• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    TO PREPARE A PLUFFY PULP SHEET, PLUFFY PULP SHEET, PAPER PRODUCT, PERSONAL CARE PRODUCT, MEDICAL PRODUCT, INSULATION PRODUCT, CONSTRUCTION PRODUCT, STRUCTURAL MATERIAL, CEMENT, FOOD PRODUCT, VETERINARY PRODUCT, PACKAGING PRODUCT, DIAPER, CAP , FEMALE ABSORBENT, GAUZE, BANDAGE, FLAME RETARDANT, OR A COMBINATION THEREOF Provides a process for making a sheet of fluff pulp, comprising forming a mat comprising fluff pulp fibers, and applying at least one anti-binder surfactant to the mat to manufacture the fluffy pulp sheet. A fluff pulp sheet is also provided, comprising a mat comprising fluff pulp fibers; at least one anti-binding surfactant; and a fiber breakout energy of 145 KJ / Kg. Fluffy pulp sheet products and uses are also provided.
    公开号:BR112012002427B1
    申请号:R112012002427-2
    申请日:2010-08-05
    公开日:2021-08-31
    发明作者:Jianer Jiang；James E. Sealey
    申请人:International Paper Company；
    IPC主号:
    专利说明:

    Invention history Field of Invention
    [001] The present invention refers to sheets of fluffy pulp ("fluff"), processes for its manufacture and its use. Brief description of the drawings
    [002] Several embodiments are described in conjunction with the attached drawing, where: Figure 1 shows a schematic example of an embodiment of a papermaking machine, where A is an input box; B is a composition (eg comprising fluff pulp fibers) applied to a frame C of headbox B; D is a training shower; And it's a suction box; F is a first press; G is a second press or transition to dryer H; I is a training shower; J is a spool for collecting the finished fluffy pulp sheet K; and L is an arrow showing the direction of the product in the machine as it progresses from headbox A to blanket J. Detailed description of the various achievements
    [003] An embodiment of the object claimed in the present invention results in a significant reduction in operational risk, such as sheet breakage, in the manufacture of soft pulp sheets. Another embodiment of the object claimed in the present invention results in the improvement of the shredding quality of soft pulp sheets. Another embodiment of the object claimed in the present invention results in improved fragmentation ("singulation of fluff pulp fiber in fluff pulp sheets. Another embodiment of the object claimed herein results in reduction of energy expended in the disaggregation process in fluff pulp sheet fibers". Another embodiment of the object claimed here results in satisfactory Mullen values of fluffy pulp sheets.
    [004] Another embodiment of the object claimed here results in a fluffy pulp sheet with reduced energy in the fiber disintegration process, but which maintains a satisfactory Mullen value. Another embodiment of the object claimed herein is a fluffy pulp sheet with improved surfactant retention. Another embodiment of the object claimed herein is a fluffy pulp sheet or absorbent product obtained therefrom, with improved absorbency and low absorption times. In one embodiment, the fluffy pulp sheet can be processed at high speeds without sheet breakage or other processing problems occurring. In another embodiment, the object claimed here avoids the disadvantages of conveying a mechanically weak sheet by a papermaking machine.
    [005] An embodiment of the invention relates to a process for making a sheet of fluff pulp comprising: forming a web comprising fluff pulp fibers; and apply at least one anti-binding surfactant to the mat to make the fluffy pulp sheet.
    [006] In one embodiment, forming comprises one or more steps of contacting a fluff pulp mixture comprising fluff pulp fibers and water with a frame in a papermaking machine, removing at least a portion of water from a fluff pulp mixture comprising fluff pulp fibers and water with a suction box under a frame in a papermaking machine, at least partially drying a fluff pulp mixture comprising fluff pulp fibers and water in a flotation dryer, heating a fluff pulp blend comprising fibers of soft pulp and water, heat the anti-binding surfactant or a combination thereof.
    [007] The anti-binder surfactant can be properly applied to the mat. For example, the anti-binding surfactant can be appropriately sprayed onto the mat using a training shower or spray bar on the frame, employing coating methods known in the prior art of paper making, or the mat can be immersed in the anti-ligand surfactant. Combinations of application methods are possible.
    [008] In one embodiment, the anti-binder surfactant is sprayed onto the mat.
    [009] In one embodiment, the spraying step is conducted using one or more training showers on a frame in a papermaking machine.
    [0010] In one embodiment, the batt may be dried in a dryer to form a batt or sheet of dry fluff pulp. The mat can be properly dried in a drying section. Any drying method commonly known in the state of the art of fluff pulp papermaking can be used. The drying section can include and contain a drying vessel, flotation dryer, roller drying, Condebelt drying, infrared, or other drying means and mechanisms known in the prior art. The fluffy pulp sheet can be dried to contain any selected amount of water. In one embodiment, the mat is dried using a flotation dryer.
    [0011] In one embodiment, the application comprises applying the anti-binder surfactant to the dry mat.
    [0012] In another embodiment, an anti-binder surfactant can be additionally and optionally applied to the fluff pulp sheet. The second anti-binding surfactant so applied may be the same as or different from the anti-binding surfactant applied to the mat. In one embodiment, the second anti-binder surfactant is applied to the fluffy pulp sheet before the sheet is collected on the spool. The second anti-binding surfactant can suitably be applied by spraying, for example, from a second forming shower or spray bar located in the dry section.
    [0013] The blanket can be properly dried until it reaches a moisture content between 0 and 70%. This range includes all values and subranges in between, including 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 , 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70 % or any combination or range thereof. In one embodiment, the blanket is dried to a moisture content of <70%. In another embodiment, the blanket is dried to a moisture content of <50%. In another embodiment, the blanket is dried to a moisture content of <25%. In another embodiment, the batt is dried to a unit content of < 10%. In another embodiment, the blanket is dried to a moisture content of < 7%. In another embodiment, the blanket is dried until it reaches a moisture content of about 6.3%
    [0014] In one embodiment, the mat may have a grammage ranging from 100 to 1100 g/m2. This range includes all values and their subranges, for example, 100, 125, 150, 175, 200, 225, 250, 275, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, or any combination or range thereof.
    [0015] In one embodiment, the solids content of the fluffy pulp batt and/or sheet at the point or points of application of the anti-binder surfactant may suitably range from 1 to 100%. This range includes all values and subranges in between, including 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 , 60, 65, 70, 75, 80, 85, 90, 95, 99, 100%, or any combination or range thereof. In one embodiment, the solids content of the batt and/or fluff pulp sheet at the point or points of application of one or more anti-binding surfactants is > 1%. In another embodiment, the solids content of the batt and/or fluff pulp sheet at the point or points of application of one or more anti-binding surfactants is >25%. In another embodiment, the solids content of the batt and/or fluff pulp sheet at the point or points of application of one or more anti-binding surfactants is >50%.
    In one embodiment, the fluff pulp mixture further comprises one or more additives such as bleach, dye, pigment, optical bleaching agent, wetting agent, binder, bleaching agent, other additive or a combination thereof. If present, the amount of additive is not particularly limited. In one embodiment, the additive can be present in amounts ranging from about 0.005 to about 50 percent by weight, based on the weight of the fluffy pulp mixture. This range includes all values and subranges in between, including about 0.005, 0.006, 0.007, 0.008, 0.009, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0 .07, 0.08, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 2 , 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40, 45 and 50 percent by weight, or any combination thereof, based on the weight of the fluffy pulp.
    [0017] In one embodiment, the mat comprises a solids content >1% by weight. This range includes all values and subranges thereof, including 100, 99, 98, 97, 96, 95, 94, 93, 92, 91, 90, 85, 80, 75, 65, 60, 55, 45, 40, 35, 30, 25, 15, 10, 9, 8, 7, 6, 5, 4, 3, 2, >1% or any combination or range thereof.
    [0018] In one embodiment, the anti-binder surfactant is applied neat or in purchased form. In another embodiment, the anti-binding surfactant is used in combination with one or more anti-binding surfactants. In another embodiment, the anti-binding surfactant is applied from a solution, dispersion, emulsion or the like. In one embodiment, if applied in solution, dispersion, emulsion or the like, the concentration of the anti-binder surfactant may suitably range from 1 to 50% by weight of the solids content of the anti-binder surfactant with respect to the weight of the solution, dispersion, emulsion or the like. This range includes all values and subranges in between, including 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 , 18, 19, 20, 25, 30, 35, 40, 45, 50% or any combination or range thereof.
    [0019] In one embodiment, the anti-binding surfactant is in the form of a composition further comprising water and optionally one or more pH adjusting agents, bleach, dye, pigment, optical bleaching agent, wetting agent, binder, bleaching agent, cationic metal trivalent, alum, another additive, or a combination thereof. If present, the amount of additive is not particularly limited. In one embodiment, the additive can be present in amounts ranging from about 0.005 to about 50 percent by weight, based on the weight of the anti-binder surfactant composition. This range includes all values and subranges in between, including about 0.005, 0.006, 0.007, 0.008, 0.009, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0 .07, 0.08, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 2 , 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40, 45 and 50 percent by weight, or any combination thereof, based on the weight of the composition of anti-binding surfactant.
    [0020] Anti-binding surfactants are known in the state of the art of fluff pulp and fluff pulp fiber. Any anti-binding surfactant is suitable for use in this order, and its choice is at the discretion of one skilled in the fluff pulp and fluff fiber technique. Some examples, which are not intended to be limiting, include linear or branched monoalkyl amine, linear or branched dialkyl amine, linear or branched tertiary alkyl amine, straight or branched alkyl quaternary amine, ethoxylated alcohol, saturated or unsaturated, straight or branched hydrocarbon surfactant, fatty acid amide, fatty acid amide quaternary ammonium salt, dialkyl dimethyl quaternary ammonium salt, dialkylimidazolinium quaternary ammonium salt, dialkyl ester quaternary ammonium salt, triethanolamine-ditallow fatty acid, fatty acid ester of ethoxylated primary amine, ethoxylated quaternary ammonium salt, fatty acid dialkylamide, cationic surfactant, nonionic surfactant, ethoxylated unsaturated alkyl alcohol C16-C18, compound marketed under CAS Registry No. 68155-01-1, compound marketed under CAS Registry No. 26316-40-5, F60TM commercially available, flex letter TS LIQTM commercially available, F639TM available commercially Mercium, Hercules PS 9456TM commercially available, Cellulose Solutions 840TM commercially available, Cellulose Solutions 1009TM commercially available, EKA 509TM commercially available, EKA 639TM commercially available, alone, or in combination. Other examples of anti-binding surfactants are described in U.S. Patent No. 4,425,186, the contents of which are incorporated herein by reference.
    [0021] Considering the teachings described herein, and the knowledge of those skilled in the technique of manufacturing paper with fluff pulp, one can easily determine the method of application of the anti-binder surfactant to the mat, and the amount, composition, temperature, time of residence, and the like, to perform the object here claimed. For example, the total amount of anti-binding surfactant in the batt and/or the finished fluff pulp sheet can be increased or reduced or otherwise controlled by controlling the various points of addition. For example, the amount of anti-bonding surfactant applied to the wet section can be increased or reduced by respectively reducing or increasing the amount applied to the dry section. In addition, one or more of the same or different type of anti-binder surfactant, or any combination thereof, may be applied at any point in the process.
    [0022] In another embodiment, the mat further comprises water and optionally one or more of an anti-binder surfactant, pH adjusting agent, whitener, dye, pigment, optical bleaching agent, wetting agent, binder, whitening agent, trivalent cationic metal , alum, another additive or a combination thereof.
    [0023] In one embodiment, the finished fluff pulp sheet can be fiber-disintegrated or shredded according to methods known in the state of the art. For example, fiber de-aggregation or shredding can be conducted in a hammer mill.
    [0024] In one embodiment, the fluff pulp sheet and/or the fluff pulp sheet disaggregated into fibers or shredded, or a combination thereof, may be appropriately incorporated into one or more of an adsorbent product, paper product, paper product. personal care, medical product, insulating product, construction product, structural material, cement, food product, veterinary product, packaging product, diaper, tampon, tampon, gauze, bandage, flame retardant, or a combination thereof. These products and methods for their manufacture and use are well known in the state of the art.
    [0025] Another embodiment refers to a sheet of fluffy pulp, manufactured by the process described herein.
    [0026] Another embodiment relates to a sheet of fluff pulp, comprising: a mat comprising fluff pulp fibers; at least one anti-binding surfactant; and a fiber breakdown energy of < 145 kJ/kg.
    [0027] The fiber disaggregation energy, sometimes called the shredding energy, of the fluff pulp sheet is suitably less than 145 kJ/kg. This range includes all values and subranges in between, including 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 , 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145 kJ/kg, or any combination or range thereof. In one embodiment, the fiber breakdown energy of the fluff pulp sheet is less than 135 kJ/kg. In another embodiment, the fiber breakdown energy of the fluff pulp sheet is 120 to less than 145 kJ/kg. In another embodiment, the fiber breakage energy of the fluff pulp sheet is less than 120 kJ/kg. In another embodiment, the fiber breakdown energy of the fluff pulp sheet is 100 to 120 kJ/kg. In another embodiment, the fiber breakdown energy of the fluff pulp sheet is less than 100 kJ/kg. In another embodiment, the fiber breakage energy of the fluff pulp sheet is less than 95 kJ/kg
    In one embodiment, the fluffy pulp sheet has a SCAN-C 33:80 absorption time of < 4.0 s. This range includes all values and subranges in between, including 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 , 2, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.0, 3 .1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, < 4.0 s or any range contained therein.
    [0029] In one embodiment, the fluffy pulp sheet in sieve fractionation has a % Good > 50%. This range includes all values and subranges in between, including 50, 55, 60, 65, 70, 75, 80, 90, 95, 100% or any range contained therein.
    [0030] In one embodiment, fluff pulp sheet in sieve fractionation has a % of Fines < 40%. This range includes all values and subranges in between, including 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 30, 35, 40% or any combination or any range of same.
    [0031] In one embodiment, fluff pulp sheet in sieve fractionation has a % Fragments of < 30%. This range includes all values and subranges in between, including 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30%, or any combination or range thereof.
    In one embodiment, the fluffy pulp sheet has a Mullen value of >620 kPa (90 psi). This range includes all values and subranges in between, including 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 150, 155, 160, 165, 170, 175, 180, 185 , 190, 195, 200, 205, 210, 215, 220, 225, 230, 235, 240, 245, 250 psi and above, or any range contained therein.
    [0033] In one embodiment, the fluff pulp sheet contains the anti-binder surfactant in an amount of >0.45 kg (1 lb) of anti-binder surfactant solids per ton of the fluff pulp fibers. This range includes all values and subranges in between, including 0.45, 0.5, 0.54, 0.59, 0.64, 0.68, 0.73, 0.77, 0.82, 0 .86, 0.91, 0.95, 1.0, 1.04, 1.09, 1.14, 1.18, 1.22, 1.27, 1.32, 1.36, 1.41 , 1.45, 1.5, 1.54, 1.59, 1.63, 1.68, 1.72, 1.77, 1.81, 1.81, 2.27, 2.27, 2 .72, 3.18, 3.63, 4.08, 4.54, 6.80, 9.07 kg (1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.0, 5, 5.0, 6, 7, 8, 9, 10, 15, 20 lb) of anti-binder surfactant solids per ton of fluff pulp fibers, and above or any range contained therein. In one embodiment, if more than one anti-binding surfactant is used, this range will be the total amount with respect to all anti-binding surfactants present in the fluff pulp sheet.
    [0034] In one embodiment, the fluffy pulp sheet has a moisture content of 25% or less. This range includes all values and subranges in between, including 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 , 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 25% or any combination or range thereof. In another embodiment, the fluffed pulp sheet has a unit content of or less. In another embodiment, the fluffy pulp sheet has a moisture content of 10% or less. In another embodiment, the fluffed pulp sheet has a unit content of 7% or less. In another embodiment, the fluffy pulp sheet has a moisture content of 6.3%.
    [0035] In one embodiment, the fluffy pulp sheet has a density of 0.5 to 0.75 g/cm3. This range includes all values and subranges in between, including 0.5, 0.55, 0.6, 0.65, 0.7 and 0.75 g/cm3 or any range contained therein.
    [0036] In one embodiment, the fluffy pulp sheet has a gauge of 40 to 70 mm. This range includes all values and subranges in between, including 40, 45, 50, 55, 60, 65, 70 mm and any range contained therein.
    [0037] In one embodiment, the fluffy pulp sheet may have a grammage ranging from 100 to 1100 g/m2. This range includes all values and subranges contained therein, for example 100, 125, 150, 175, 200, 225, 250, 275, 300, 400, 500, 600, 700, 800, 900, 1000, 1100 or any combination or range thereof.
    [0038] Another embodiment relates to an adsorbent product, paper product, personal care product, medical product, insulating product, construction product, structural material, cement, food product, veterinary product, packaging product, diaper, tampon , feminine-absorbent, gauze, bandage, flame retardant, or a combination thereof, comprising the fluffed pulp sheet and/or the fiber-disaggregated or shredded fluff pulp sheet, or a combination thereof.
    [0039] Another embodiment refers to the use of an adsorbent product, paper product, personal care product, medical product, insulating product, construction product, structural material, cement, food product, veterinary product, packaging product, diaper , tampon, tampon, gauze, bandage, flame retardant, or a combination thereof, comprising the fluffed pulp sheet and/or "fluffed" pulp sheet disaggregated into fibers or defibrated, or a combination thereof.
    [0040] Fluffy pulp and fluffy pulp fibers are known in the state of the papermaking art. Any fluff pulp or fluff pulp fiber is suitable for use in this order, and its choice is at the discretion of one skilled in the fluff pulp and fluff fiber technique. One or more than one, or any combination, of fluff pulp and/or fluff pulp fibers can be used. The fluff pulp and fluff pulp fibers may be treated or untreated, and may optionally contain one or more than one additive, or combination thereof, known in the prior art. Considering the teachings contained herein, the level of treatment, if desired, and the amount of additives can be readily determined by one skilled in the fluff pulp and fluff fiber art.
    [0041] Similarly, the formation of a fluff pulp or fluff pulp fiber mat or a fluff pulp mixture or supply on a headbox frame in a paper making machine is part of the state of the pulp art fluff and fluffy pulp fiber.
    [0042] The type of fluff pulp or fluff pulp fiber suitable for use in the present invention is not intended to be restrictive. Fluffy pulp typically includes cellulosic fiber. The type of cellulosic fiber is not critical, and any such fiber known or suitable for use in soft pulp paper can be used. For example, fluff pulp can be made from pulp fibers derived from hardwood trees, softwood trees, or a combination of hardwood and softwood trees.
    [0043] Fluffy pulp fibers can be prepared by any of the known or appropriate operations of digestion, refining and/or bleaching, such as, for example, mechanical, thermomechanical, chemical and/or semichemical pulping, and/or other well-known pulping processes. The term "hardwood pulps" as used herein includes fibrous pulp derived from the woody substance of deciduous trees (angiosperms) such as birch, oak, beech, maple and eucalyptus. The term "softwood pulps" as used herein includes fibrous pulps derived from the woody substance of coniferous trees (gymnosperms) such as the fir, spruce, and pine varieties such as, for example, the American loblolly pine , pinus elliotti, Colorado spruce, balsamic spruce and Douglas fir.
    [0044] In some embodiments, at least a portion of the pulp fibers may be supplied by non-woody herbaceous plants including, but not limited to, hibiscus (Kenaf), hemp, flax, sisal or Philippine banana, although legal and other restrictions considerations may make the use of hemp and other sources of fiber impractical or impossible. Both bleached and unbleached fluff pulp fiber can be used. Recycled fluff pulp fibers are also suitable for use.
    The fluff pulp sheet may suitably contain from 1 to 99% by weight of fluff pulp fibers based on the total weight of the fluff sheet. In one embodiment, the fluff pulp sheet may contain from 5 to 95% by weight fluff pulp fibers based on the total weight of the fluff sheet. These ranges include any and all values and subranges in between, for example, 1, 5, 10, 15, 20, 25, 30, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 and 99% by weight.
    [0046] The soft pulp sheet may optionally contain from 1 to 100% by weight of soft pulp fibers originating from softwood species, based on the total weight of the soft pulp fibers in the soft pulp sheet. In one embodiment, the soft pulp sheet may contain from 10 to 60% by weight of soft pulp fibers originating from softwood species, based on the total amount of soft pulp fibers in the soft pulp sheet. These ranges include 1, 2, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 and 100% by weight, and any and all bands and sub-bands contained therein, based on the total amount of soft pulp fibers in the soft pulp sheet.
    All or part of the softwood fibers may optionally originate from softwood species with a CSF ("Canadian Standard Freeness") refining degree of 300 to 750. fluff pulp of a softwood species having a CSF of 400 to 550. These ranges include any and all values and subranges in between, for example, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, 430, 440, 450, 460, 470, 480, 490, 500, 510, 520, 530, 540, 550, 560, 570, 580, 590, 600, 610, 620, 630, 640, 650, 660, 670, 680, 690, 700, 710, 720, 730, 740 and 750 CSF. CSF refining degree is measured according to TAPPI T-227 standard assay.
    [0048] The soft pulp sheet may optionally contain from 1 to 100% by weight of soft pulp fibers originating from hardwood species based on the total amount of soft pulp fibers in the soft pulp sheet. In one embodiment, the soft pulp sheet may contain from 30 to 90% by weight of soft pulp fibers originating from hardwood species, based on the total amount of soft pulp fibers in the soft pulp sheet. These ranges include 1, 2, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 and 100% by weight, and any and all values and subranges contained therein, based on the total amount of soft pulp fibers in the soft pulp sheet.
    [0049] All or part of the hardwood fibers may optionally be derived from hardwood species with a CSF refining degree of 300 to 750. In one embodiment, the soft pulp sheet may contain fibers from hardwood species having CSF values of 400 to 550. These ranges include 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, 430, 440, 450, 460, 470, 480, 490, 500, 510 , 520, 530, 540, 550, 560, 570, 580, 590, 600, 610, 620, 630, 640, 650, 660, 670, 680, 690, 700, 710, 720, 730, 740 and 750 CSF and any and all tracks and subtracks contained therein.
    The softwood sheet may optionally contain less refined softwood fibers such as less refined softwood fibers, less refined hardwood fibers, or both. Combinations of less refined and more refined fibers are possible. In one embodiment, the fluff pulp sheet contains fibers that are at least 2% less refined than the fluff pulp fibers used in conventional fluff pulp sheets. This range includes all values and subranges in between, including at least 2, 5, 10, 15 and 20%. For example, if a conventional fluff pulp sheet has fibers, softwood and/or hardwood, with a CSF of 350, then, in one embodiment, the fluff pulp sheet may contain fibers with a CSF of 385 (i.e., 10 % less refined than conventional).
    [0051] When the fluff pulp sheet has both hardwood fluff pulp fibers and softwood fluff pulp fibers, the hardwood/softwood fluff pulp fiber weight ratio may optionally range from 0.001 to 1000. In one embodiment, the hardwood/softwood ratio can range from 90/10 to 30/60. These ranges include all values and subranges in between, including 0.001, 0.002, 0.005, 0.01, 0.02 , 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75 , 80, 85, 90, 95, 100, 200, 300, 400, 500, 600, 700, 800, 900 and 1000.
    [0052] Softwood fibers, hardwood fibers, or both, can be optionally modified through physical and/or chemical processes, to obtain the fluff pulp. Examples of physical processes include, but are not limited to, electromagnetic and mechanical processes. Examples of electrical modifications include, but are not limited to processes involving contacting the fibers with a source of electromagnetic energy such as light and/or electrical current. Examples of mechanical modifications include, but are not limited to processes involving contacting an inanimate object with fibers. Examples of such inanimate objects include objects with sharp edges or blunt (blunt) edges. Such processes also involve, for example, cutting, kneading, grinding, impaling and the like, and combinations thereof.
    [0053] Non-restrictive examples of chemical modifications include conventional chemical fiber processes, such as crosslinking and/or precipitation of complexes thereon. Other examples of suitable fiber modifications include those found in US Pat. 6,592,717, 6,592,712, 6,582,557, 6,579,415, 6,579,414, 6,506,282, 6,471,824, 6,361,651, 6,146,494, H1704, 5,731,080, 5,698,688, 5,698. 074, 5,667,637, 5,662,773, 5,531,728, 5,443,899, 5,360,420, 5,266,250, 5,209,953, 5,160,789, 5,049,235, 4,986,882, 4,496,427, 4,431,481, 4,174,417, 4,166,894, 4,075,136 and 4,022,965, the contents of which are independently incorporated herein by reference.
    [0054] Some examples of fluffy pulp, which are not intended to be restrictive, include commercially available RW SupersoftTM, Supersoft LTM, RW Supersoft PlusTM, GT Supersoft PlusTM, RW Fluff LITETM, RW Fluff 110TM, RW Fluff 150TM, RW Fluff 160TM, GP 4881TM, GT pulpTM, RW SSPTM, GP 4825TM, alone or in any combination.
    [0055] As discussed herein, if desired, additives such as a pH adjusting agent, bleach, dye, pigment, optical bleaching agent, wetting agent, binder, bleaching agent, trivalent cationic metal, alum, other additive, or a combination of them can be used. Such compounds are known in the art and commercially available. Considering the teachings contained herein, one skilled in the fluff pulp technique and fluff pulp papermaking are able to select and use them as appropriate.
    [0056] If present, the amount of additive is not particularly limited. In one embodiment, the additive can be present in amounts ranging from about 0.005 to about 50 percent by weight, based on the weight of the fluff sheet. This range includes all values and subranges in between, including about 0.005, 0.006, 0.007, 0.008, 0.009, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0 .07, 0.08, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 2 , 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 35, 40, 45 and 50 percent by weight, or any combination thereof, based on the weight of the failure. finished fluffy pulp.
    [0057] One or more optical bleaching agents may optionally be present. Typically, optical bleaching agents are fluorescent dyes or pigments that absorb ultraviolet radiation, re-emitting it at higher wavelengths in the visible (blue) spectrum, thus imparting a white and clear appearance to the paper sheet when added to the bulk composition of paper, although any optical bleaching agent can be used. Examples of optical bleaches include, but are not limited to, azoles, biphenyls, coumarins, furans, stilbenes, ionic bleaches, including anionic, cationic and anionic (neutral) compounds such as the EccobriteTM and EccowhiteTM compounds manufactured by Eastern Color & Chemical Co. (Providence, RI); naphthalimides; pyrazenes; substituted stilbenes, such as the LeucophorTM line of optical bleaches from Clariant Corporation (Muttenz, Switzerland) and TinopalTM from Ciba Specialty Chemicals (Basel, Switzerland); salts of such compounds including, but not limited to, alkali metal salts, alkaline earth metal salts, transition metal salts, organic salts and ammonium salts of such bleaching agents; and combinations of one or more of the aforementioned agents.
    [0058] Examples of optional fillers include, but are not limited to, clay, calcium carbonate, calcium sulfate hemihydrate, and calcium sulfate dehydrate, chalk, GCC, PCC, and the like.
    [0059] Examples of optional binders include, but are not limited to polyvinyl alcohol, Amres (Kymene type), Bayer Parez, polychloride emulsion, modified starch such as hydroxyethyl starch, starch, polyacrylamide, modified polyacrylamide, polyol, polyol adduct carbonyl, ethanedial/polyol condensate, polyamide, epichlorohydrin, glyoxal, glyoxal urea, ethanedial, aliphatic polyisocyanate, isocyanate, 1,6-hexamethylene diisocyanate, diisocyanate, polyisocyanate, polyester, polyester resin, polyacrylate, polyacrylate resin , acrylate and methacrylate. Other optional substances include, but are not limited to, silicas such as colloids and/or sols. Examples of silicas include, but are not limited to, sodium silicate and/or boron silicates.
    [0060] The composition may optionally and additionally include one or more pigments. Non-limiting examples include calcium carbonate, kaolin clay, calcined clay, aluminum trihydrate, titanium dioxide, talc, plastic pigment, earth calcium carbonate, precipitated calcium carbonate, amorphous silica, modified calcium carbonate, modified calcined clay, aluminum silicate, zeolite, aluminum oxide, colloidal silica, colloidal alumina slurry, modified calcium carbonate, modified earth calcium carbonate, modified precipitated calcium carbonate, or a mixture thereof.
    [0061] In one embodiment, the modified calcium carbonate is modified earth calcium carbonate, modified precipitated calcium carbonate, or a mixture thereof. In the present invention, the term "modified" is sometimes referred to as "structured". These types of pigments are known to those skilled in the papermaking art.
    [0062] Fluffy pulp fibers can be formed into a single-layer or multi-layer batt in a papermaking machine, such as a Fourdrinier machine or any other suitable papermaking machine known in the prior art. The basic methodologies involved in manufacturing fluff pulp sheets in various papermaking machine configurations are known in the prior art and therefore will not be described in detail in the present invention. In one embodiment, the fluff pulp mixture or fluff pulp fibers may be in the form of a relatively low consistency aqueous slurry of the pulp fibers, optionally together with one or more additives. In one embodiment, the fluff pulp mixture or fluff pulp fiber slurry is ejected from a headbox onto a frame, eg a continuous mobile porous forming sheet or fabric, where the liquid, eg water, is gradually drained through small holes in the screen, optionally with the help of one or more suction boxes, until a mat of pulp fibers and, optionally, the other materials, are formed on the screen. The anti-binding surfactant can be applied to the mat at any point along the frame, for example, by spraying from a forming shower. In one embodiment, the still wet mat is transferred from the fabric to a wet press where more fiber-to-fiber consolidation occurs and moisture is further reduced. In one embodiment, the mat is then passed to a drying section to remove a portion or most or substantially all of the retained unit, further consolidating the fibers in the mat. After drying, the dry fluff batt or sheet may be further treated with one or more of the same or different anti-binding surfactants, or any combination thereof, with a forming shower, spray bar, or the like.
    [0063] The precise location where the respective compositions are applied or contacted may depend on the specific equipment involved, the exact conditions of the process used and similar factors. Such factors are easily determined in accordance with the teachings cited here, together with the knowledge of a person skilled in the art of papermaking. Examples
    [0064] The claimed object can be described in more detail with reference to the examples described below. The examples are intended to be illustrative, although the claimed object is not restricted to the materials, conditions or process parameters mentioned in the examples. All parts and percentages are by unit weight unless otherwise indicated. The various tests whose results are described herein are cited below: Fluffy Pulp FIBER DISAGGREGATION TEST OR JOHNSON NIT TEST PROCEDURE: 1. 5.00 g of fiber-disaggregated pulp is placed in a Johnson Nit counter. . Air pressure is set to 689 kPa (100 psi) and test time set to 600 seconds.3. At the end of the test, the quantity retained on the No. 16 sieve is weighed and recorded.4. The quantity retained on the No. 30 sieve is then weighed and recorded.5. The difference between the initial quantity and the quantity retained in the two sieves is recorded as the quantity that passed through the No. 30 sieve. Multidose acquisition test procedure1. A 5" x 12" fluffy pulp sample was compressed to a density of 0.154 g/cm3 using a Beloit Wheeler.2 calender cylinder. A sheet of paper stock produced according to the "Make-to-Stock=MTS" method was placed on top of the compressed sample.3. A 1" diameter dosing tube weighing 1000 g was centered on top of the sample. 4. 30 ml of 0.9% saline was dosed at a flow rate of 7 ml/sec. 5. Timing started after dosing started and ended when all the saline had been absorbed. The absorption time was recorded. 6. 300 seconds after the first dose was absorbed, a second dose of saline was applied, The timing procedure was repeated and the absorption time recorded.7 300 seconds after the second dose was absorbed, a third dose was applied and the timing procedure repeated, and the absorption time recorded. KAMAS MILL - FLUFFY PULP DEFIBRATION
    [0065] The Kamas Hammer Mill is a simulation of commercial equipment manufactured and supplied by Kamas Industri AB for use in the production of soft pulp products. Like commercial equipment, it has variable rotor speed, variable slurry feed speed, and interchangeable screens. Pulp strips are manually fed into the mill and broken into fibers with free swing hammers until the resulting fluffy pulp is sufficiently fragmented to pass through the screen holes.
    [0066] Fluffy Pulp Test Chamber: controlled conditions, 72°F and (+/-5) relative humidity
    [0067] Apparatus: Kamas Laboratory Shredder Type H01
    [0068] Sample preparation: Condition the pulp sheets in the test chamber for at least 4 hours. For lab test sheets, trim about 1/2" from edges. Cut pulp sheets into strips, 5-10 strips/sample if available, 2 inches wide. Record weights. Clean dust bag if available. necessary. Ensure that the crushing chamber is clean and the desired sieve is properly inserted. Ensure that the collection funnel/sieve is properly secured in place. Adjust rotor to 3300 rpm, feed to 15cm/sec and use 10mm sieve , unless otherwise specified Feed the slurry strip into the mill Energy will be automatically measured and displayed Ensure weight is dropped correctly Collect defibered slurry in collection sieve receiver below crushing chamber maximum capacity 4- 5 strips Pour the fluffy pulp into a plastic bag Mix by hand, then close the bag and shake vigorously to obtain a homogeneous fluffy pulp mixture. FRACTIONATION OF DEFIBRATED PLUFFY PULP IN 4 SIEVES
    [0069] Purpose: To determine the fiber size distribution in the shredded dry pulp. A high velocity mobile air stream disperses the defibered pulp on a covered test and pattern sieve while individual fibers are removed through the mesh of the screen by applying a vacuum. The amount of fluff pulp retained in the sieve mesh is determined by weight. The fiber is subjected to fractionation by a series of sieves with consecutively increasing hole openings. Fractions are calculated as a percentage of the total original soft pulp weight.
    [0070] Apparatus: Air Turbulence Fluffy Pulp Separator and Generator USA Standard Test Screens: 8" diameter x 2" height. USA Standard # 200 (75 um hole opening). USA Standard # 50 (300 um hole opening) )USA Standard #14 (1400 um hole opening) USA Standard #8 (2360 um hole opening). Note: This test should be conducted in a controlled environment with relative humidity at a temperature of 70°F to 72°F .
    [0071] Procedure: (1) condition the shredded pulp for at least 4 hours in the test chamber. Mix the fluff pulp in the plastic bag by hand and vigorously shake the closed bag containing air space to obtain the most uniform distribution of fiber fractions possible, ie to obtain a representative test sample. (2) Collect pulp from various areas of the bag and weigh 5 grams (+/- 0.01 gram). Record the weight, and place on a 200 mesh (#) tared sieve. Place the sieve over the soft pulp fractionator and cover. Seal the gap formed by the sieve with the large rubber gasket. This allows for more even air/vacuum distribution. (3) Set the timer for 5 minutes and turn on the fractionator by turning the knob to "auto". Adjust compressed air to 306 kPa (30 psi) and vacuum to 4 inches using the three-hole circular plexiglass adjustment device. (Note: Vacuum/air psi may change, check sporadically). The fines pass through the sieve and into the vacuum. At the end of the set time period, the unit automatically turns off. Once the procedure is complete, remove the sieve. Remove the lid and weigh the sieve together with the pulp on the tared scale. Record the weight of the remaining pulp on the #200 sieve. The mass of the fines is the difference in the mass of the pulp before and after fractionation. (4) Tare the #50 sieve and transfer the pulp from step 3 to the #50 sieve, cover, place over the fractionator and seal as in step 2. Set the timer for 5 minutes. Reset and restart by turning the knob to "off" and then returning to "auto". Turn on the fractionator and proceed as in step 3 (adjust air and vacuum as necessary). Record the weight of the pulp retained on the #50 sieve. (5) Tare the #14 sieve and transfer the pulp from the #50 sieve to the #14 sieve, cover, place over the fractionator and seal as in step 2. Set the timer for 5 minutes. Reset and restart by turning the knob to "off" and then returning to "auto". Turn on the fractionator and proceed as in step 3 (adjust air and vacuum as necessary). Record the weight of the pulp retained in the #14 sieve. (6) Transfer the pulp from the #14 sieve to the sieve. Repeat the above process (5 minutes, 206 kPa (30 psi), vacuum at 4") and note the weight of the pulp held in the sieve #8. The percentage of pulp that passes through the sieve # 200 is reported as Fine. on sieve #200 but passing sieve #50 is reported as Good. The percentage retained on sieve #50 but passing sieve #14 is reported as Good (A totally good result is the sum of the two good fractions) The percentage retained on the #14 sieve but passing through the #8 sieve is reported as "Nits" (30-fiber pellets). The percentage retained on the #8 sieve is reported as Fragments. in sieve #20Remaining weight in sieve #50Remaining weight in sieve #14Remaining weight in sieve #8Percentage passing through the sieve
    Percentage retained in the sieve
    Percentage that passes the sieve
    Percentage that passes the sieve
    (fiber agglomerates) Percentage passing through the sieve
    Prirontanom m 10 nocco in the ninth SCAN ABSORPTION TEST
    [0072] Purpose: To determine the absorption properties of fluffy pulp specimens. The method is based on the Scandinavian standard SCAN-C 33:80. The volume ("bulk"), the absorption rate and the absorption capacity of the fluffy pulp are measured by placing a specimen over the unit, applying a uniform load and allowing the specimen to absorb liquid from the part. from below until it becomes saturated.
    [0073] Apparatus: SCAN Absorption Tester consisting of a specimen former, absorption unit and timing device.
    [0074] Reagents: Saline solution (NaCl) at 0.0%
    [0075] Procedure: (1) Prepare a saline solution, 0.9% sodium chloride in DI water (eg 180g/20L) and transfer to a saline canister. (2) Preparation: Wash the electrode plate and dry it with a cloth; wash screen and reservoir to remove debris, dry, and replace in the tester. Open the cylinder valve and pour in the saline solution until it flows into the discharge container. Close the valve. It may be necessary to stabilize the instrument by operating a few samples before analyzing them. (3) Mix the fluffy pulp by vigorously shaking the air-filled sample bag. Weigh approximately 3.20 g of fluffy pulp (take several small portions from the bag to obtain a representative sample). (4) Tare the forming tube (the cylindrical plexiglass mold with the 50 mm base screen) and place it firmly onto the specimen former (ensure it is firmly supported on the gasket. Turn on the vacuum and feed carefully the pulp in the former in small amounts, allowing the fibers to separate as much as possible. Avoid feeding with pulp clumps. (5) After formation of the specimen, turn off the vacuum and remove the mold/screen assembly. tared assembly with specimen on scale and remove excess pulp to give a final weight of 3.00 g +/- 0.01. Arrange pulp as needed for uniform thickness. Fibers sometimes accumulate on one side of the tube, especially if they have high amounts of agglomerates ("nits") Remove them from this area first to get the 3.00 g, then arrange again as needed, carefully lifting the mat/fibers and transferring to the narrower area The. Gently compress the moved fibers to obtain a uniform thickness. Prepare 6-8 specimens per sample. (6) Computer preparation: Turn on the computer. Enter the sample ID and weight (ie 3.00 g). (7) Pre-wet the sample basket of the SCAN tester and use a cloth to wipe off excess. Lower the electrode plate and click “zero” on the computer to zero the height sensor. Lift and close the electrode plate. (8) Remove the bottom screen from the forming tube. Place the plexiglass tube over the SCAN wire basket; gently lower the electrode plate (with the load over the top of the shaft) onto the specimen, carefully lift the mold (held in place), click "Start" on the computer to activate the timer on the computer screen, and then shake the bracket and rest the tube on it. Avoid touching the wires and shaft with the tube. Observe the screen and start the saline flow for about 18-20 seconds. At 30 seconds, lift the reservoir with a smooth motion ( keeping in place) and immediately start the manual timer. Observe the specimen and stop the manual timer as soon as the liquid drains (capillary movement). When appears on the computer screen, carefully lower the reservoir, close the saline valve and leave the specimen drain. As soon as the word "test over" appears, lift the electrode plate up by the forming tube. If the specimen sticks to the plate, tap it lightly with the edge of the tube to release the specimen into the basket. Close the electrode plate, remove the forming tube and carefully transfer the specimen to a scale. Record wet weight. Record the wet weight of the specimen in the instrument computer. Record on a sheet the dry height (caliber, mm), specific volume (cm3/g), absorption time (sec), and absorption capacity as shown and the wet weight. Record the absorption time, absorption rate (cm/sec), specific volume (g/cm3) and capacity (g/g). Perform 6-10 tests per sample. Write down the averages and SD.
    [0076] Example 1: In Samples 719-727, a commercially available anti-binding surfactant, F60, manufactured by Akzo Nobel, was sprayed onto dry mats comprising fluff pulp fibers in accordance with one or more embodiments of the claimed object. The moisture content of dry blankets was 6.3%. Control samples LA and NB405 are provided for comparison purposes, and supplied commercially as treated and untreated fluff pulp sheets, respectively.

    [0077] Spray application of F60 produces a fluffed pulp sheet with a breakdown energy into fibers equal to a fully treated fluff pulp (NB405 as an example), however, surprisingly, the Mullen value of the sheet does not drop to a low level . This allows the sheet to remain processable on the winder at high speeds without breakage or processing problems on the sheet. Spray application took place on a fully dry sheet in this example, 6.3% MC. If desired, the chemical and sheet can both be heated to ~160°F) or room temperature during application. An advantage of adding the anti-binder to the dry fluffed pulp sheet (100 to 1100 g/m2) is to avoid transporting a mechanically weak sheet through the paper machine. Retention of the surfactant is also improved.
    [0078] Without being bound by any theory, it is possible that this application by spraying works because there is some migration or mixture of the chemical substance during the breakdown into fibers. The quality of fiber defibration or fragmentation is comparable to that of traditional methods of anti-binder application, although there is a significant improvement in processing difficulties, eg sheet breakage, etc.
    [0079] If added, the F60 will not be retained in the raw material before the inbox. Without being bound by any theory, it is possible that the chemistry needed for a surfactant that helps to reduce the energy to separate the fibers during the disaggregation process, but that does not induce a large reduction in the absorption rate of the fluff core, just be slightly cationic. Highly polar surfactants are satisfactorily retained in the pulp fiber, although they tend to create a fluffy pulp core that significantly reduces absorption properties (wetting and absorption rate). From the results shown in the tables and graphically illustrated in the Figures, it is clear that the examples within the scope of an embodiment of the invention present surprising and unexpectedly superior benefits when compared to the comparative examples.
    [0080] As used in every report, ranges are used in abbreviated form to describe any and all values within the range, including all subranges contained therein.
    [0081] All other references, as well as their cited references cited herein are hereby incorporated by reference, with respect to the relative portions relating to the object of the present invention and all of its embodiments.
    [0082] Several modifications and variations of the present invention are possible in light of the above teachings. It is, therefore, understood that within the scope of the appended claims, the invention may be practiced other than as specifically described herein.
    权利要求:
    Claims (13)
    [0001]
    1. A process for preparing a fluffy pulp sheet (K), comprising forming a batt (B) comprising fluff pulp fibers; drying the batt (B) to form a dry batt; spraying at least one anti-binder surfactant onto the dry mat to prepare the fluff pulp sheet (K), CHARACTERIZED by the fact that the formation comprises one or more of contacting a fluff pulp mixture (B) comprising fluff pulp fibers and water with a frame (C) in a papermaking machine, removing at least a portion of water from a fluffy pulp mixture (B) comprising fluff pulp fibers and water with a suction box (E) under a frame (C) in a papermaking machine, at least partially drying a fluff pulp mixture (B) comprising fluff pulp fibers and water in a flotation dryer (H), heating a fluff pulp mixture (B) comprising fibers of fluffy pulp and water, heating the anti-binder surfactant, or a combination thereof; wherein the anti-binder surfactant comprises one or more of linear or branched monoalkyl amine, linear or branched dialkyl amine, linear or branched tertiary alkyl amine, alcohol ethoxy ado, saturated or unsaturated hydrocarbon surfactant, straight or branched, fatty acid amide, fatty acid amide quaternary ammonium salt, dialkyl dimethyl quaternary ammonium salt, dialkyl imidazolinium quaternary ammonium salt, dialkyl quaternary ammonium salt ester, di-tallow fatty acid triethanolamine, fatty acid dialkyl amide, ethoxylated C16-C18 alkyl unsaturated alcohol, compound having CAS Registry No. 68155-01-1, compound having CAS Registry No. 26316-40-5, or a combination of them.
    [0002]
    2. Process according to claim 1, CHARACTERIZED by the fact that the spraying is conducted using one or more training showers (D, I) on a frame (C) in a paper-making machine, for example, wherein the process further comprises drying the mat in a dryer (H) to form a dry mat, in particular, wherein the application comprises applying the anti-binder surfactant to the dry mat, for example, where the mat has a moisture content of about 6.3%, for example, where the mat has a basis weight of 100 to 1100 g/m2, for example, where the mat further comprises water and optionally one or more of an anti-binding surfactant, pH adjusting agent , bleach, dye, pigment, optical bleaching agent, wetting agent, binder, bleaching agent, trivalent cationic metal, alum, other additive, or a combination thereof, for example, wherein the mat comprises a solids content of > 1% by weight, for example, where the anti-binding surfactant is pure, combin used with one or more of a second anti-binding surfactant, in solution, or combinations thereof, for example, wherein the anti-binding surfactant is in the form of a composition further comprising water and optionally one or more of a pH adjusting agent, bleach , dye, pigment, optical bleaching agent, wetting agent, binder, bleaching agent, trivalent cationic metal, alum, other additive, or a combination thereof, for example, wherein the process further comprises disaggregating into fibers or defibrating the pulp sheet fluff (K), in particular, where fiber disintegration or shredding is conducted in a hammer mill.
    [0003]
    3. Fluffy pulp sheet (K) prepared by the process as defined in claim 1, CHARACTERIZED by the fact that it comprises: a mat (B) comprising fluff pulp fibers; at least one anti-binding surfactant, as defined in claim 1; and a fiber breakdown energy of < 145 kJ/kg and a Mullen value of > 620 kPa (90 psi).
    [0004]
    4. Sheet, according to claim 3, CHARACTERIZED by the fact that it further comprises a SCAN-C 33:80 absorption time of < 4.0 s.
    [0005]
    5. Sheet, according to claim 3, CHARACTERIZED by the fact that it also comprises in the sieve fractionation a Goodde percentage > 50%.
    [0006]
    6. Sheet, according to claim 3, CHARACTERIZED by the fact that it also comprises in the sieve fractionation a percentage of Fines of < 40%.
    [0007]
    7. Sheet, according to claim 3, CHARACTERIZED by the fact that it also comprises in the sieve fractionation a percentage of Fragments of < 30%.
    [0008]
    8. Sheet according to claim 3, CHARACTERIZED by the fact that the anti-binding surfactant is present in an amount of > 0.45 kg/ton (1 Ib/ton) of fluff pulp fibers.
    [0009]
    9. Sheet, according to claim 3, CHARACTERIZED by the fact that it also comprises a moisture content of about 6.3%.
    [0010]
    10. Sheet, according to claim 3, CHARACTERIZED by the fact that it further comprises a density of 0.5 to 0.75 g/cm3.
    [0011]
    11. Sheet, according to claim 3, CHARACTERIZED by the fact that it further comprises a caliber from 40 to 70 mm.
    [0012]
    12. Sheet, according to claim 4, CHARACTERIZED by the fact that it further comprises a finished grammage of 100 to 1100 g/m2.
    [0013]
    13. Sheet, according to claim 3, CHARACTERIZED by the fact that it is used as an absorbent product, paper product, personal care product, medical product, insulating product, construction product, structural material, cement, food product, veterinary product, packaging product, diaper, tampon, tampon, gauze, bandage, flame retardant, or a combination thereof.
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    法律状态:
    2020-09-01| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-09-08| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-01-19| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2021-05-04| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-08-17| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-31| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 05/08/2010, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF, QUE DETERMINA A ALTERACAO DO PRAZO DE CONCESSAO. |
    优先权:
    申请号 | 申请日 | 专利标题
    US23139909P| true| 2009-08-05|2009-08-05|
    US61/231,399|2009-08-05|
    PCT/US2010/044553|WO2011017522A2|2009-08-05|2010-08-05|Dry fluff pulp sheet additive|BR122020024226-4A| BR122020024226B1|2009-08-05|2010-08-05|PROCESS TO PREPARE A PLUFFY PULP SHEET|
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