• 专利附录
  • 专利说明
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    • 专利摘要:
    FIBER, SHORT FIBER SPIN YARN, CONTINUOUS FILAMENT YARN AND FLAME RETARDANT CLOTH. These are technical yarns and fibers made with partially aromatic polyamides and non-halogenated flame retardant additives. Cloths made of such fibers and yarns demonstrate superior flame retardancy over conventional flame retardant nylon cloths. In addition, the disclosed fibers and yarns, when mixed with other flame retardant fibers, do not demonstrate the common "structural effect" danger with blended 6.6 flame retardant nylon cloths.
    公开号:BR112013006887B1
    申请号:R112013006887-6
    申请日:2011-09-21
    公开日:2020-12-08
    发明作者:Deborah M. Sarzotti；Andrew W. Briggs；Thomas E. Schmitt
    申请人:Invista Textiles (U.K.) Limited；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    The invention relates to yarns, technical fibers, and cloths in general, and in particular to yarns, flame retardant fibers and cloths made from them which comprise partially aromatic polyamides and non-halogenated flame retardant additives. TECHNOLOGY BACKGROUND
    Flame retardant (FR) cloths are crucial in both military and non-military environments. Firefighters, race car drivers and petrochemical workers are just a few of the non-military groups that benefit from the added protection of flame retardant cloths. However, the real benefit of flame retardant cloths lies with the armed forces. In addition to the relentless surroundings in which our military troops must operate, the advent of modern, unconventional wars creates an even more hostile environment. Specifically, the use of improvised explosive devices (“lEDs”) to immobilize large convoys of soldiers makes protection of individual troops critically important.
    In addition to ballistics and vest cloths, flame retardant cloths serve as a crucial role in protecting LED soldiers. lEDs are constructed from numerous materials (for example, highly explosive charges, flammable liquids, piece of projectile, etc.), with some acting as projectiles and others acting as arsonists by detonation. Therefore, military cloths need to be of varying construction to deal with the multitude of dangers of an IED.
    There are basically two types of flame retardant cloths used in protective clothing: (1) cloths made from organic flame retardant fibers (eg, aramid, real flame retardant silk, polybenzimidazole, modacrylic, etc.); and (2) Flame retardant cloths made from conventional materials (for example, cotton) that have been post-treated to provide flame retardancy. The aromatic polyamides of Nomex® and Kevlar® are among the most common types of synthetic flame retardant fibers. These are made by solution spinning of a meta or para-aromatic polyamide polymer fiber. Aromatic polyamides do not melt under extreme heat, they are naturally flame retardant, but need to be spun by solution. Unfortunately, Nomex® is not very comfortable and is difficult and costly to produce. Kevlar® is also difficult and costly to produce.
    Post-treatment flame retardants are applied to cloths and can be broken down into two basic categories: (1) durable flame retardants; and (2) non-durable flame retardants. For protective clothing, the treatment needs to endure washing, so only durable treatments are selected. Today, more often than not, durable flame retardant chemistry relies on phosphorus-based FR agents and chemicals or resins to fix FR agents on the cloth.
    A polymer fiber that has been studied extensively because of its processability and strength is nylon fiber 6.6. A small amount - about 12% of aliphatic nylon fibers can be mixed with cotton and chemically treated to produce a flame retardant cloth. Because cotton is the main fiber component, this cloth is called “FR cotton” cloth. Nylon fibers provide superior wear resistance to FR cotton cloths and suits. However, because nylon is processable by fusion (ie thermoplastic) and does not offer inherent flame resistance, the amount of nylon fiber in an FR cloth is limited. Attempts to chemically modify aliphatic nylon fibers and increase the nylon fiber content, while still achieving adequate flame retardancy, have been successful. Indeed, Deopura and Alagirusamy declare in their recent book Polyesters and Polyamides (The Textile Institute 2008, on page 320) that “it seems unlikely that any great progress will be made in relation to improved reactive flame retardant comonomers and / or new or retardant additives. of conventional flames for use in nylon fibers ”. BRIEF DESCRIPTION OF THE INVENTION
    The problem with the use of blends of thermoplastic fibers with non-melting flame resistant fibers (for example, aliphatic polyamides and FR treated cotton) is the so-called “structural effect”, (see Horrocks et al., Fire Retardant Materials in 148, § 4.5.2 (2001)). In general, thermoplastic fibers, which include those treated or modified with RF agents, self-extinguish themselves away from the flame source or molten polymer drips away from the flame source and extinguishes. FR polyester fiber is a fiber with such behavior. When the FR polyester fiber is mixed with a non-melting flame retardant fiber, such as FR-treated cotton, the non-melting fiber forms a carbonaceous structure (the “frame effect”) and the thermoplastic FR polyester fiber is constricted in the flames and will continue to burn. Mainly, during the vertical flammability test, the thermoplastic fiber polymer melts and proceeds through the non-thermoplastic mesh and feeds the flames and the cloth burns completely. Additionally, in clothing, the molten polymer can drip and stick to human skin and result in additional injuries to the wearer.
    Enhanced flame retardant nylon blends are required that eliminate the “structure effect”, provide good flame retardancy, prevent dripping and adhesion, and are wear resistant. Therefore, it is desirable to find a melt-processed polymer combination that can be mixed with flame retardant additives in a fiber that can be knitted or woven or prepared in a suit, quilting or wear-resistant, wear-resistant flame retardant cloth and non-woven self-extinguishing.
    The invention disclosed in this document provides a flame retardant cloth made from a melt-processed polyamide and a non-halogen flame retardant additive. Surprisingly, it has been observed that partially aromatic polyamides, when mixed with flame retardant additives, are processable by melting into fibers that exhibit superior flame retardancy over aliphatic polyamide (for example, nylon 6.6) when mixed with the same flame retardants. This is unexpected because partially aromatic polyamides are thermoplastic (that is, melted upon heating), which are associated with the “structure effect” and poor flame retardancy.
    In one aspect, a flame retardant fiber is disclosed, comprising a partially aromatic polyamide and a non-halogenic flame retardant. The partially aromatic polyamide can comprise aromatic diamine monomers and aliphatic diacid monomers. In addition, the partially aromatic polyamide may comprise polymers or copolymers of aliphatic and aromatic diacids and diamines, which include MXD6. For example, MXD6 refers to polyamides produced from m-xylenediamine (MXDA) and adipic acid.
    In another aspect, flame retardant cloths and yarns made with the revealed flame retardant fibers are revealed. The yarns can also comprise additional fibers, either natural or synthetic, which includes short fibers and continuous filament. The additional fibers can be inherently flame retardant or treated with flame retardants. Cloths may also comprise additional yarns, either natural, synthetic, or a mixture of both. The additional yarns can be treated with flame retardants or contain fibers treated with flame retardants. Cloths can be dyed and also have additional finishes applied, both flame retardant and non-flame retardant. BRIEF DESCRIPTION OF THE FIGURES
    Figures 1a to 1h show the flame retardancy of various aspects of the disclosed flame retardant polymer and conventional nylon 6.6 flame retardant polymers.
    Figure 2 shows the problem of structure effect.
    Figures 3a to 3c show the flame retardancy of two aspects of the revealed cloth when mixed with real flame retardant silk, and 6.6 flame retardant nylon mixed with real flame retardant silk.
    Figure 4 compares the MXD6 after-flame time against nylon 6.6 with a variety of additives. DETAILED DESCRIPTION OF THE INVENTION
    The terms "flame resistant", "flame retardant" and "FR" have subtle differences in technique. Differences in the use of the terms refer to describing cloths that either resist burning, burn at a slower rate and are capable of self-extinguish under conditions such as a vertical flame test. For the purposes of this invention the terms “flame resistant” and “flame retardant” are used interchangeably and are intended to include any cloth that has one or more of the properties such as burn resistance, slow combustion, self-extinguishing, etc.
    A flame retardant fiber is disclosed comprising a partially aromatic polyamide and a non-halogen flame retardant additive. The partially aromatic polyamide can include polymers or copolymers that include monomers selected from the group consisting of aromatic diamine monomers, aliphatic diamine monomers, aromatic diacid monomers, aliphatic diacid monomers and combinations thereof. The partially aromatic polyamide can also include or be exclusively MXD6 which includes an aromatic diamine and non-aromatic diacid. Another partially aromatic polyamide can be based on an aromatic diacid such as terephthalic acid (polyamide 6T) or isophthalic acid (polyamide 61) or mixtures thereof (polyamide 6T / 6I). Melting or processing temperatures for partially aromatic polyamides are in the range of about 240 ° C (for MXD6) to about 355 ° C (for polyamideimide), which includes about 260 ° C, 280 ° C, 300 ° C, 320 ° C and 340 ° C. Nylon 6 and Nylon 6.6 have melting temperatures of about 220 ° C and 260 ° C, respectively. The lower the melting temperature, the easier it is for the polyamide polymer to process into fiber. Below is a list of common partially aromatic and certain comparative non-aromatic polymers and their associated melting temperatures.

    The partially aromatic polyamides can also include copolymers or mixtures of multiple partially aromatic amides. For example, MXD6 can be mixed with 6 / 6T nylon before forming a fiber. In addition, partially aromatic polymers can be mixed with an aliphatic polyamide or copolymers or mixtures of multiple aliphatic polyamides. For example, MXD6 can be mixed with Nylon 6.6 before forming a fiber.
    Non-halogen flame retardant additives can include: melamine condensation products (which include melam, melem and melon), melamine phosphoric acid reaction products (which include melamine phosphate, melamine pyrophosphate and melamine polyphosphate (MPP) ), reaction products of melamine condensation products with phosphoric acid (which include melam polyphosphate, melem polyphosphate, melon polyphosphate), melamine cyanide (MC), zinc diethylphosphinate (DEPZn), aluminum diethylphosphinate (DEPAI) , calcium diethylphosfinate, magnesium diethylphosfinate, bisphenol-A bis (dipheniphosphinate) (BPADP), resorcinol bis (2,6-dixylenyl phosphate) (RDX), resorcinol bis (diphenyl phosphate) (RDP), phosphorous oxinitride, borate zinc, zinc oxide, zinc stannate, zinc hydroxystannate, zinc sulfide, zinc phosphate, zinc silicate, zinc hydroxide, zinc carbonate, zinc stearate, magnesium stearate, ammonium octamolybdate, molybdate that of melamine, melamine octamolybdate, barium metaborate, ferrocene, boron phosphate, boron borate, magnesium hydroxide, magnesium borate, aluminum hydroxide, alumina trihydrate, glycoluril and 3-amino-1 melamine salts, 2,4-triazole-5-thiol, urazol salts of potassium, zinc and iron, 1,2-ethanediyl-4-4'-bis-triazolidine-3,5, dione, silicone, oxides of Mg, Al, Ti , Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Mo, Sn, Sb, Ba, W and Bi, polyhedral oligomeric silsesquioxanes, silicotungstic acid (SiTA), phosphotungstic acid, melamine salts of tungstic acid, phosphonates or cyclic, branched or linear phosphates, spirobisphosphonates, spirobisphosphates and nanoparticles, such as carbon nanotubes and nanoargyls (which include, without limitation, those based on montmorillonite, haloisite and laponite).
    The flame retardant additive is present in an amount of about 1% to about 25% w / w, which includes from about 5% to about 20% w / w, about 5% to about 10%, and about 10%. The average particle size of the flame retardant additive is less than about 3 microns, which includes less than about 2 microns, and less than about 1 micron.
    The particle size of the flame retardant additive can be prepared by a grinding process that comprises air-jet grinding of each component, or by mixing components of the component to reduce the particle size. Other wet or dry grinding techniques known in the art (e.g., medium grinding) can also be used to reduce particle size of fiber spinning additive. If appropriate, grinding may involve the injection of liquid grinding aids, possibly under pressure, into the mill at any suitable point in the grinding process. These liquid auxiliaries are added to stabilize the flame retardant system and / or prevent agglomeration. Additional components to aid in particle wetting and / or prevent re-agglomeration can also be added at any suitable point during the grinding of flame retardant additive, the blending of the flame retardant additive and polymer, and / or the fiber spinning process .
    The flame retardant can be composed with the polymeric material in an extruder. An alternative method involves dispersing the polymer flame retardant composition at a higher than desired concentration in the final polyamide fiber product, and forming a standard mixture. The standard mixture can be ground or pelletized and the resulting particulate dry mixed with additional polyamide resin and this mixture is used in the fiber spinning process. Yet another alternative method involves adding some or all of the components of the flame retardant additive to the polymer at any suitable point in the polymerization process.
    The flame retardant fiber can be a short fiber or continuous filament. The flame retardant fiber can also be contained in a non-woven cloth such as cloth connected by spinning and blowing in fusion or combination thereof. The filament cross section can be any shape, which includes rounded, triangle, star, square, oval, bilobal, tri-lobal or flat. In addition, the filament can be textured using known texturing methods. As discussed above, fiber-spun partially aromatic polyamides can also include additional aliphatic or partially aromatic polymers. When such 5 fibers are spun, a mixture of more than one polyamide polymer can be mixed prior to spinning in yarn or a multi-filament yarn can be produced, containing at least one partially aromatic polyamide polymer and a polyamide polymer partially aromatic additional or aliphatic polymer in a bicomponent form such as a side-by-side or core / sheath configuration.
    The short flame retardant fiber can be spun into a flame retardant yarn. The yarn can comprise 100% flame retardant fiber, or it can be a blend of additional short fibers, both flame retardant and non-flame retardant, to make a short fiber spun yarn. Additional fibers may include cotton, wool, linen, hemp, silk, nylon, lyocell, polyester and real silk. The short fiber spun yarn above may also comprise other thermoplastic or non-thermoplastic fibers, such as cellulose, aramides, novoloid, phenolic, polyesters, oxidized acrylic, modacrylic, melamine, poly (p-phenylene benzobisoxazole) (PBO), polybenzimidazole 20 ( PBI), or polysulfonamide (PSA), oxidized polyacrylonitrile (PAN), such as partially oxidized PAN, and mixtures thereof. As used herein, cellulose includes cotton, real silk, and lyocell. Thermoplastic / non-thermoplastic fibers can be flame retardant. Certain fibers, such as aramid, PBI, or PBO, maintain resistance after exposure to flames and, when used in mixed yarns and cloths, are effective in reducing the charred length of cloth after an inflammability test.
    Cloths comprising the flame retardant yarn made with the revealed flame retardant fiber will self-extinguish in vertical textile flammability tests (ASTM D6413). Self-extinguishing behavior is achieved in cloths made from 100% of the revealed flame retardant fiber or in blends of the flame retardant fiber and short fiber spun fibers as revealed above. Cloths made with flame retardant yarn can also include additional yarns, such as cellulose fibers, aramids, phenolic, polyester, oxidized acrylic, modacrylic, melamine, cotton, silk, linen, hemp, wool, royal silk, lyocell, poly (p-phenylene benzobisoxazole) (PBO), polybenzimidazole (PBI), and polysulfonamide (PSA), partially oxidized acrylic (which includes partially oxidized polyacrylonitrile), novoloid, wool, linen, hemp, silk, nylon (whether FR or not), polyester (whether FR or not), antistatic fibers, and combinations thereof. The cloth can be treated with additional flame retardant additives and finishes if necessary. An exemplificative method for treating cotton is found in the technical information "Fabric Flame Retardant Treatment" (2003), published by Cotton Incorporated, Cary, North Carolina, in this document incorporated by reference in its entirety. Cloths can be woven, sewn, and non-woven cloths. Non-woven cloths include those made from untangled, wet-laid blankets, or fusing / spinning blowing processes.
    The fibers, threads and cloths can also contain additional components such as: UV stabilizers, antimicrobial agents, bleaching agents, optical brighteners, antioxidants, pigments, dyes, soil repellents, stain repellents, nanoparticles and water repellents, water stabilizers. UV, antimicrobial agents, optical brighteners, antioxidants, nanoparticles, and pigments can be added to the flame retardant fiber prior to melt spinning or added as a post-treatment fiber formation. Dyes, soil repellents, stain repellents, nanoparticles and water repellents can be added as a post-treatment after cloth and / or fiber formation. For yarns and cloths, the additional component can be added as an after-treatment. Cloths made with the revealed flame retardant fiber can also have a coating or laminated film applied for abrasion resistance or for liquid / vapor permeation control.
    As shown in Figures 1a to 1h, laminates molded with the revealed flame retardant polymer show superior flame retardancy (as measured using ASTM D-6413) compared to laminates molded with conventional 6.6 nylon flame retardant fibers .
    Figure 2 is a schematic illustration of the Structure Effect associated with thermoplastic and non-thermoplastic flame retardant fibers. Figures 3a to 3c compare cloths made with flame retardant fiber and real flame retardant silk revealed to cloths made with nylon 6.6 flame retardant fibers and real flame retardant silk. In the present context, the cloths made with the revealed flame retardant fibers (Figures 3b - 3c) do not suffer from the structural problem, while the nylon 6.6 cloth (Figure 3a) suffers. Figure 4 shows the flammability data for nylon 6.6 and MXD6 polymers with various flame retardant additives in various concentrations. The figure shows the unexpected advantage with MXD6 over nylon 6.6. DEFINITIONS
    After flame means: "Persistent burning of a material after the ignition source has been removed". [Source: ATSM D6413 Standard Test Method for Textile Flame Resistance (Vertical Method)]
    Carbonized length means: "The distance from the edge of, which is directly exposed to flames to the maximum visible cloth damage, after a specified tearing force has been applied". [Source: ATSM D6413 Standard Test Method for Textile Flame Resistance (Vertical Method)]
    Drop means: "A flow of liquid that lacks sufficient quantity or pressure to form a direct current". [Source: National Fire Protection Association (NFPA) Standard 2112, Standard in Flame Resistant Suits for Protection of Industrial Personnel from Sudden Fire].
    Fusion means: "The response to heat by a material resulting in evidence of flow or dripping". [Source: National Fire Protection Association (NFPA) Standard 2112, Standard in Flame Resistant Suits for Protection of Industrial Personnel from Sudden Fire].
    Self-extinguishing means: Material that will not persistently burn after the ignition source has been removed or the burning will stop before the specimen is completely consumed. When tested by the ATSM D6413 Standard Test Method for Textile Flame Resistance (Vertical Method). TEST METHODS
    The flame retardancy was determined according to the Standard ATSM D6413 Test Method for Textile Flame Resistance (Vertical Test).
    Preparation of compression molded laminates: Polymers with or without an FR additive are molded by compression into films approximately 10 cm x 10 cm in size and weighing approximately 10 grams. Before molding, woven glass fiber meshes are placed above and below the polymer blend. Fiberglass meshes prevent polymer shrinkage or melting from the flames during the vertical flammability test and can predict the potential existence of the “structural effect”. The weight of the miles is about 7% of the final laminate. The molding temperature is approximately 25 degrees Celsius above the melting temperature of the polymer. EXAMPLES EXAMPLES 1 TO 7: RETARDANCE OF MOLDED LAMINATE FLAMES MADE WITH VARIOUS ASPECTS OF THE REVEALED FLAME RETARDANT FIBER
    The test laminates were prepared using the above technique. Example 1 is made with MXD6 and without a flame retardant additive. Example 2 is made with MXD6 and 10% w / w MPP additive (melamine polyphosphate). Example 3 is made with MXD6 and 10% w / w MC additive (melamine cyanurate). Example 4 is made with MXD6 and 10% w / w DEPZn additive (zinc diethylphosfinate). Example 5 is made with MXD6 and 10% w / w DEPAI (aluminum diethylphosfinate). Example 6 is made with MXD6 and 2% w / w SiTA (silicotungstic acid). Example 7 is made with MXD6 and 20% w / w of MC additive. The results are reported in Table 1 below. COMPARATIVE EXAMPLES 1 TO 4: MOLDED LAMINATE FLAME RETARDANCE MADE WITH Nylon 6.6 AND FLAME RETARDANT ADDITIVES
    The test laminates were prepared using the above technique. Comparative example 1 is made with nylon 6.6 and without flame retardant additive. Comparative example 2 is made with nylon 6.6 and 10% w / w MPP additive. Comparative example 3 is made with nylon 6.6 and 10% w / w of MC additive. Comparative example 4 is made with nylon 6.6 and 10% w / w DEPZn additive. Comparative example 5 is made with nylon 6.6 and without flame retardant additive. The results are reported in Table 1 below. TABLE 1 - FLAME RETARDANCE MEASUREMENTS


    As shown above in Table 1, the self-extinguishing flame retardant laminates revealed and had shorter flame times compared to the 6.6 nylon counterpart. In addition, the flame retardant laminates disclosed did not result in burning droplets either, a desired characteristic of any flame retardant cloth. Because the polymers based on MXD6 and nylon 6.6 are melt processable, the results with the MXD6 polymer above are surprising and unexpected. EXAMPLES 8 TO 18: PANEL FLAME RETARDANCE MADE WITH REVEALED FLAME RETARDANT FIBER AND FLAME RETARDANT REAL SILK
    In the following examples, the thermoplastic flame retardant yarns were combined with a real short-fiber spun FR silk thread (Lenzing FR) and sewn on a tube cloth. The merged cloth contained approximately 50 percent of each thread. Fiber and oil and sewing finishes were removed from the cloths before the flammability test.
    Example 8 is a blend of flame retardant MXD6 fiber cloth containing 2% w / w of MPP additive with real flame retardant silk fiber. Example 9 is a blend of flame retardant MXD6 fiber cloth containing 5% w / w of MPP additive with real flame retardant silk fiber. Example 10 is a mix of fiber cloth
    Flame retardant MXD6 containing 10% w / w MPP additive with real flame retardant silk fiber. Example 11 is a blend of flame retardant MXD6 fiber cloth containing 2% w / w DEPAI additive with real flame retardant silk fiber. Example 12 is a blend of flame retardant MXD6 fiber cloth containing 5% w / w DEPAI additive with real flame retardant silk fiber. Example 13 is a blend of flame retardant MXD6 fiber cloth containing 10% w / w DEPAI additive with real flame retardant silk fiber. Example 14 is a blend of flame retardant MXD6 fiber cloth containing 5% w / w DEPZn additive with real flame retardant silk fiber. Example 15 is a blend of flame retardant MXD6 fiber cloth containing 10% w / w DEPZn additive with real flame retardant silk fiber. The results are reported in Table 2 below. COMPARATIVE EXAMPLES 6 TO 8: FLAME RETARDANCE OF CLOTHES MADE WITH Nylon 6.6 FLAME RETARDANT FIBER AND FLAME RETARDANT REAL SILK
    Comparative example 6 is a blend of flame retardant 6.6 nylon fiber cloth containing 5% w / w MPP additive with real flame retardant silk fiber. Comparative example 7 is a blend of flame retardant nylon 6,6 fiber cloth containing 10% w / w MPP additive with real flame retardant silk fiber. Comparative example 8 is a blend of nylon 6.6 flame retardant cloth that contains 10% w / w DEPAI additive with real flame retardant silk fiber. The results are reported in Table 2 below. TABLE 2 - FLAME RETARDANCE MEASUREMENTS

    1 Percentage based on thermoplastic polymer fiber.
    In the present context, the blend of MXD6 and flame retardant real silk fibers showed superior results to the comparative blend of nylon 6.6 fibers and flame retardant real silk. As discussed 5 above, these results are surprising and unexpected.
    Although the invention has been described in conjunction with specific aspects of it, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Consequently, the invention is intended to encompass all of these alternatives, modifications and variations that fit the spirit and scope of the claims.
    权利要求:
    Claims (12)
    [0001]
    1. FLAME RETARDANT SHORT FIBER YARN, characterized by the fact that it comprises at least one flame retardant fiber comprising MXD6 composed or dispersed with a non-halogen flame retardant additive before or before the fiber extrusion, in which the retardant additives Non-halogen flame retardants are present in a concentration of 5% to 20% by weight of said fiber and are selected from the group consisting of melamine polyphosphate (MPP), zinc diethylphosphinate (DEPZn), aluminum diethylphosphinate (DEPAI), silicotungstic acid (SiTA) and melamine cyanurate (MC), and their combinations; said fiber having cloth properties of wear resistance and durability when formed in a cloth, gown or garment, being self-extinguishing in a vertical flammability test and exhibiting a shorter after-flame time compared to a nylon 6 counterpart , 6 with 5% or 10% MPP, 10% MC, 10% DEPAI, 10% DEPZn or 2% SiTA; and an additional fiber.
    [0002]
    2. YARN, according to claim 1, characterized by the fact that said additional fiber is selected from the group consisting of: cellulose fibers, aramides, phenolic, polyester, oxidized acrylic, modacrylic, melamine, silk, linen , hemp, wool, poly (p-phenylene benzobisoxazole) (PBO), polybenzimidazole (PBI) and polysulfonamide (PSA).
    [0003]
    3. YARN according to claim 1, characterized by the fact that said additional fiber has been treated with a flame retardant.
    [0004]
    4. YARN according to claim 1, characterized by the fact that said additional fiber is cotton, real silk, polyester or lyocell.
    [0005]
    5. FLAME RETARDANT CONTINUOUS FILAMENT YARN, characterized by the fact that it comprises at least one flame retardant fiber comprising MXD6 composed or dispersed with a non-halogenic flame retardant additive before or before the fiber extrusion, in which the flame retardant additives Non-halogen flames are present in a concentration of 5% to 20% by weight of said fiber and are selected from the group consisting of melamine polyphosphate (MPP), zinc diethylphosphinate (DEPZn), aluminum diethylphosphinate (DEPAI), silicotungstic acid ( SiTA) and melamine cyanurate (MC), and their combinations; said fiber having cloth properties of wear resistance and durability when formed in a cloth, gown or garment, being self-extinguishing in a vertical flammability test and exhibiting a shorter after-flame time compared to a nylon 6 counterpart , 6 with 5% or 10% MPP, 10% MC, 10% DEPAI, 10% DEPZn or 2% SiTA; wherein said flame retardant fiber is continuous and an additional continuous filament fiber.
    [0006]
    6. YARN, according to claim 5, characterized by the fact that said additional continuous filament fiber is selected from the group consisting of: aramid fibers, phenolic, polyesters, oxidized acrylic, modacrylic, melamine, lyocell, poly (p-phenylene benzobisoxazole) (PBO), polybenzimidazole (PBI) and polysulfonamide (PSA).
    [0007]
    7. YARN according to claim 5, characterized in that said additional continuous filament fiber has been treated with a flame retardant.
    [0008]
    8. CLOTH, characterized by the fact that it comprises the thread, as defined in claim 1 or 5.
    [0009]
    9. CLOTH, according to claim 8, characterized by the fact that it additionally comprises an additional yarn.
    [0010]
    10. CLOTH, according to claim 9, characterized by the fact that said additional yarn comprises a fiber selected from the group consisting of: cellulose fibers, aramides, phenolic, polyester, oxidized acrylic, modacrylic, melamine, cotton , silk, linen, hemp, wool, royal silk, lyocell, poly (p-phenylene benzobisoxazole) (PBO), polybenzimidazole (PBI) and polysulfonamide (PSA).
    [0011]
    11. NON-WOVED FLAME RETARDANT CLOTH, 5 characterized by the fact that it comprises the thread, as defined in claim 1 or 5.
    [0012]
    12. CLOTH, according to claim 11, characterized by the fact that said non-woven fabric is made through a process selected from the group consisting of: connected by spinning, blowing in fusion and a combination thereof.
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    法律状态:
    2018-04-03| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2018-06-12| B25G| Requested change of headquarter approved|Owner name: INVISTA TECHNOLOGIES S.A R.L. (CH) |
    2018-06-26| B25A| Requested transfer of rights approved|Owner name: INVISTA TEXTILES (U.K.) LIMITED (GB) |
    2019-06-04| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|
    2020-06-02| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2020-09-01| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-12-08| 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 21/09/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US38561410P| true| 2010-09-23|2010-09-23|
    US61/385,614|2010-09-23|
    PCT/US2011/052557|WO2012040332A2|2010-09-23|2011-09-21|Flame retardant fibers, yarns, and fabrics made therefrom|
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