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    • 专利摘要:
    1514396 Saponified starch esters; corrugating adhesives CPC INTERNATIONAL Inc 22 July 1976 [22 July 1975 (3)] 30698/76 Heading C3U A saponified starch ester comprises the reaction product of a saponifiable starch ester characterized as having at least 30% greater area under the force time heating curve and at least 30% greater area under the force-time cooling curve compared with unmodified corn starch under the same test conditions, and sufficient alkali to substantially completely saponify the ester. The ester is used in corrugating adhesive compositions.
    公开号:SU862834A3
    申请号:SU762387751
    申请日:1976-07-21
    公开日:1981-09-07
    发明作者:Х.Клейн Гари；Л.Аронс Говард；Ф.Стеджскал Джозеф；Дж.Стивенс Дональд；Ф.Зоубел Генри；Вондоловски Лоренс
    申请人:Си Пи Си Интернэшнл, Инк (Фирма)；
    IPC主号:
    专利说明:

    (54) ADHESIVE COMPOSITION FOR CORRUGATED 1 The invention relates to starch based adhesives for the manufacture of corrugated paperboards. Corrugated cardboard is made by corrugating a strip of paper with a corrugated roll, applying glue to the tops of the corrugations of the corrugated strip on one side and pasting another strip of paper called lining to the tops of the corrugations by heating and creating pressure. This material, which is called one-sided corrugated cardboard, can be used directly after manufacture. However, it usually finds application for the production of double-sided material, also called double-faced material, by processing single-sided cardboard in the second stage, called the stage of applying the second lining in a corrugating machine. At the same time, the glue is applied to the opposing tops of the projections and the second paper facing is glued to the opposite side by heating and creating a relatively low pressure. Impact high -. --Ch, -. .
    CARDBOARD pressure when gluing the second paper strip leads to the destruction of the corrugations. A known adhesive composition for shirring comprising an aqueous suspension of partially hydrated starch in an undesirable medium. This modified starch can be obtained by passing moistened starch granules over a number of different rollers, the temperature of which is maintained below the gluing temperature of starch Cl3. i Known adhesive composition for corrugated cardboard, comprising an aqueous dispersion of starchy solid product. This dispersion is characterized by a high dry matter content and a low water content. The adhesive is applied at a high temperature (76.6786, ll-C). After cooling the laminate to a temperature of 32, 22-54, 44c, an adhesive bond 2} is formed. . Known glue for corrugation, the use of which allows to increase the speed of work (ztanka, and at least part of the filling material of such a composition is related to oxyalkyl starch of the SZZ. Such 1sley does not provide sufficient speed of the machine. The closest in technical essence and the achieved result to the proposed The adhesive composition is a Stein-Hall type adhesive, including unmodified corn starch, sodium hydroxide, borax, and DAG43. A Stein-Hall type adhesive is a two-sided adhesive. One of its components is usually obtained from a boiled or gelatinized starch product that serves as a filler. Other materials that can form relatively viscous aqueous sludges, in particular carboxymethylcellulose, can also be used as naphtha filaments. from raw, ungelatinized starch material. This component is a latent or potential adhesive phase, i.e. The adhesive properties of such a CS are incompletely hidden before this glue is applied to the tops of the ridges of the corrugated sheet material, pressing the cladding to the glue-coated tips of the ridges, heating and applying pressure, heating causes the edatinization and development of the structure of the granular starch material. The swelling and gelatinization of the latent adhesive phase occurs by passing freshly corrugated cardboard through a drying system with heating plates I and interacting with the corrugating machine. This system also partially dries the corrugated cardboard and causes sufficient hardening of the adhesive, which allows subsequent operations , in particular, cutting, longitudinal cutting and cutting sheets without peeling any individual elements. The initial degree of cohesion-ability of a corrugated corrugated cardboard joint is called the strength of an immature compound. This esarak teristics opr Yedelev e sprsob spine Sts zhesfsfmirovannogo gofrsch ovaiiogo ct tone resist mgnovvvio daySTVUYu1TsIM high force m odvvga cat rye may arise during the course of subsequent operahday process such as cutting edges, slitting and cutting the sheets, but not necessarily a an indication of the ultimate strength of a joint. The strength of an immature compound (immature strength) is the main limiting factor that governs the speed offered for the manufacture of corrugated cardboard on any type of corrugated machine. Experienced operator often sets the machine to the maximum speed at which it is able to manufacture corrugated cardboard without flaking the lining during subsequent edging, slitting and sheet cutting. Since the peel resistance is a characteristic that is directly determined by immature strength, the characteristics of glue for corrugated materials play a direct role in improving the efficiency of the machine, which in turn determines the rate of return on investment that comes from this machine. After trimming, longitudinal cutting and cutting sheets, corrugated cardboard is placed in the stack and sent to storage where the glue is opened until the joint is fully secured. Before drying and fully curing the compound, the corrugated cardboard is able to peel off due to the gradual and constant pulling of the lining from the corrugated sheet. Edges of a certain class, when used as an adhesive compound in an adhesive composition for corrugated materials, have been found to exhibit excellent properties. This allows the use of corrugating machines at a speed that is 50-100% higher than the speed / possible in the case of using adhesive compositions of the Stein-Hall type or proposed at a later time non-refractory adhesive compositions for corrugated materials subject to the use of glue in almost the same quantities. However, the Stein-Hall type adhesive does not provide a sufficiently high initial bonding strength and therefore cannot be used in high-speed crimping machines,. The aim of the invention is to increase the initial bonding strength. The goal is achieved in that the adhesive composition, including starch, sodium hydroxide, borax and WATER, additionally contains saponified starch acetosuccinate in the following ratio of components, wt.% -: 2.98-3.34 starch. The saponified acetosuccinate 16.42-16.75 starch Hydroxide 0.57-0.66 sodium 0.46-0.6 78.65-79, -57 Saponified starch acetosuccinate not only exhibit unusually high viscosity when gelling, but, moreover, ensures the achievement of high immature strength without the need for evaporation of the solvent; Boer is usually used. glue paste glue structure. However, its excess may have the opposite effect on the strength of the cured adhesive. In addition, borax tends to increase the temperature of the gel composition. Usually, approximately up to 10 mol of borax can be introduced into the composition. Alkali is used to reduce the gel temperature of the adhesive composition to a relatively acceptable value, generally to 62.78-65, 56 ° C, however, in some cases, the temperature may be 60-71.11 ° C. In any adhesive composition for the manufacture of corrugated materials, it is not possible to use significant amounts of alkali in accordance with both the conventional technology and the invention, since the alkali weakens the gel structures of the adhesive paste. Any plant source can be used to produce the acetosucate starch citrate. Preferred are starches, semi-finished FROM non-waxed cereals or cereals, in particular maize, wheat, rice, and sorghum grain. The term starch or starch is used in a broad sense, as it covers flour, modified starch, and descent. Corn starch is the primary starch feed product. The water content in the adhesive composition must be such that immediately after gelatinization the glue ({has an extreme stickiness. This means that in order to be completely complete and gelatinization, the presence of a sufficient amount is necessary, more preferably it is necessary to achieve tackiness when exposed to heat in the corrugating device. adhesive compositions include the same amount of starch of 1FODUKT that is associated with known adhesive compositions. Usually the granular starch component in the adhesive composition Type of Stein-Hall contains approximately 10-25% of starch. The final adhesive mixture usually includes approximately 12-25% of starch from its total amount in the form of a latinized filler, Example. Comparative experiments on the manufacture of corrugated cardboard. Before desiccated unmodified starch adhesive compositions of Stein-Hall, it is necessary to determine the limit of scrosce above which conventional starch adhesives could not sufficiently combine these ementy corrugated cardboard, t, e. to the extent that prevents their spontaneous exfoliation during the subsequent stages, and then determine the speed of the machine, when the machine is broken in the process of manufacturing corrugated cardboard using the proposed composition, the corrugated cardboard made in this example is two-sided cardboard from a corrugated sheet weighing 11.79 kg, located between two Kraft cardboard sheets weighing 19.05 kg. For the experiment, bets were used to make double-faced corrugated paperboard. The temperature of the hot plates is maintained at 148 / VEB. Initially, the adhesive gap of the adhesive application unit is 0.356 mm. Glue of the type of Stein-Hall, used as a control, and the proposed adhesive compositions receive the following image. To prepare the control glue, 37.85 liters of water are added to the primary blender, 9.07 kg (9.68%) of corn starch is added and heated to 65.56 ° C. Then 1.497 kg (1.6%) of hydrate oxide is added sodium dissolved in 7.571 l of water and stirred for 15 minutes. Then 37.85 l of cooled water are poured, stirred for 10 minutes and kept at 43.33 ° C, Bo secondary liquid is poured onto 113.56 l of water and heated to 32.22 seconds, then 1.54 kg (10 mol, 0) is added. , 57%) Bourd and 45.36 kg (16.73%) non-modus {Dirovac corn starch ... .,. Then the mixture from the primary mixer is introduced into the wood from the secondary mixer for 30 minutes and the oil held at 43/33-C. Viscosity is adjusted to 60 with gfilding of 17.03 L of water. The composition that is prepared by loteeByio is prepared next; 37.85 l of water is poured into the primary forestr, 8.62 kg of 9.21% unmodified corn starch is added and heated to 65, followed by 1.77 kg (0.65%) of sodium hydroxide dissolved in in 7.571 liters of water and stirred for -. 15 min. Next, 37.85 l of cooled water is made out and kept at 43 ,. 113.56 l of water is poured into the secondary system and heated to 32, then we add 0.68 kg (10 mol) of borax, 5.36 kg (16.75%) of rachmaly acetosuccinate (for acetate, degree (G3) 0.027 and for succinate sz, 01). The mixture from the primary mixer is added to the mixture from the secondary mixer within 3 minutes and held at 43 33Ci. Lured for 5 minutes and 0.68 kg (10 mol) 0.25%) borax is added. 15.14 liters of water are then poured in and the viscosity is adjusted to 60 seconds.
    The final adhesive composition contains 3.18% unmodified corn starch, 0.65% sodium hydroxide, 0.25% borax (initially added to the secondary mixer), 16.75% acetate acetate succinate, and 0.25% borax Added later to the secondary mixer ).
    The adhesiveness of these compositions is determined as indicated below.
    Indicators of conventional and acetosuccinate adhesives are shown in Table 1. Table 1
    Both of these adhesive compositions are evaluated sequentially using the same crimping machine. When using control glue, the maximum speed of operation of the corrugating machine before the beginning of the flaking of the corrugated cardboard linings in the zone of impact of the cutting blade is 137.16 m / min. In the case of using acetosucdine starch as the original starch component in the composition of the Stein-Hall adhesive. Double-sided corrugated cardboard achieves an operating speed of 182.86 m / min. After this, the glue gap of the unit for the machine making the double-faced corrugated card is increased from 0.356 to 0.406 m and. the speed of operation of the corrugating machine is brought to 213.36 m / min or it is increased by 55% compared with the speed in the control experiment. As a result of non-resolution, the strength of the joint of double-faced corrugated cardboard layers is extremely high. When more kukokski skosfosti, the corrugating machine, which applies one facing layer and feeds preformed paper to the machine for making double-faced corrugated cardboard, cannot work as a result of the glue composites that were used at the stage with the machine for producing one-sided corrugated cardboard, It is a typical unmodified starch glue that is widely distributed, and the material from the machine receives an insufficient amount of heat to ensure satisfactory fast lining. 1atinization such glue. However, in cases where the web of the machine for making one-sided corrugated paperboard is refilled, the machine for double-sided corrugated paperboard can reach speeds for short periods of time that exceed 243/83 m / min. The limitations of these high-speed intervals are due to the approach of loosely glued single-sided sheets of cardboard to a machine for the manufacture of double-faced corrugated cardboard (i.e., for gluing the second facing side). Thus, starch acetosuccinate based glue makes it possible to produce good double-faced corrugated cardboard at speeds of corrugating machines that greatly exceed 213.35 m / min, Example 2. Corrugated cardboard manufacturing experiments. Next, the shirring test was carried out using the same shirring machine and under substantially the same process conditions as in Example 1. Cardboard was made using facing sheets weighing 19.05 kg and corrugated sheets weighing 26 pounds with an adhesive gap of 0.330 and 0.356 mm. The starch derivative used as the primary adhesive component is starch acetosuccinate with C3 for acetate and 0.011 for succinate as 0.015. It has been found that the adhesive composition prepared as described below can be used at a rather HIGH machine speed. The composition is prepared as follows. 8, the primary mixer is poured 189.27 liters of water, 40.82 kg (10.67%) is added, the unmodified corn edge is small, 9.07 kg (2.37%) of sodium hydroxide in 18.93 liters of water, heated to 71 11c 1l incubated for 15 minutes Then pour 124.92 liters of water. 757 liters of water are poured into the secondary blender, 4.08 kg are added (10 mop of 0.17% borax and 226.80 kg of acetate acetate. Blend. From the primary blender are introduced into the mixture from the secondary blender L for 30 minutes, after 2.27 kg (10 mol; borax. The adhesive composition obtained contains 2.98% unmodified kurus starch, 0.66% sodium hydroxide, 0.3% borax (added to the secondary blender), 16.53 acetosuccinate starch and 0.17% borax. (added later to the secondary mixer)., C. using this adhesive with a glue gap of 0.330 mm corrugated The machine can efficiently operate at a speed of 213.35 m / min, reducing the adhesive gap to 0.229 mm allows achieving a stable speed of operation of this machine, exceeding 243.83 m / min. After that, the speed of the corrugating machine reaches its y). Then, facing sheets weighing 19.05 kg were replaced with facing sheets weighing 28.12 kg. With heavier facing sheets, the corrugating machine effectively produced corrugated cardboard at a speed of 198.11 m / min at a temperature of hot plastics 176.67e. For conventional starch adhesives, the limit is 91.44-152.40 m / min at: 148.89 ° C and 106.68-121.92 m / min at 176.67 s Temperature of hot plates if such facing LI are used .STY - on this machine. The efficiency of corrugation using the proposed composition is greatly increased. Example 3. Additional experiments. Compositions of Stein-Hall Additional experiments were carried out using the same machine as in example 2, and facing sheets weighing 28.12 kg, as well as the following primary adhesive components; ala starch derivative; starch acetosuccinate (C3.dl acetate 0.013, for succinate 0.016); starch acetosuccinate (for C3 acetate 0.018, for succinate 0.014). A 1% starch derivative, which ideally differs as a, is obtained as in Example 2, and is used on a shaft machine with an adhesive gap of 0.178 mm and a hot plate temperature of 149.44 ° C. Initially, the machine reached an operating speed of 182.87 m / min. After opening the glue gap to 0.254 w, an operating speed of 228.59 m / min is achieved. Then the temperature of the hot plates will be raised to 176.6 ° C, as a result of which an operating speed of 236.21 m / min is achieved while maintaining high rates of production of corrugated cardboard. In the case where the adhesive composition described in example 2, which includes the starch derivative identified above as in, is used in practice on a general-purpose machine with a glue clearance of 0.178 NW with a hot plate of 176.67 ° C, efficiently producing (yuzirovannogo cardboard, it is possible even at a speed of 243.83 m / min. Example p. 4. Composition of non-filling type. In a small scale, use adhesive composition (1U-1),. Kotora contains 18-20%. starch acetoacetate (Sz for acetate O, 0266, dl. Succinate (0.018) as the primary adhesive component in the aqueous slurry; This is equivalent to the aqueous composition of a conventional 11-bag mixture at the factory (i.e., equivalent to compositions that contain 11 bags of adhesive component approximately 2460.46 liters of total adhesive). The second experiment is a wire t using an adhesive composition (1U-2) prepared from a mixture of unmodified corn starch and a primary adhesive component, taken in such a ratio that 2 out of 11 bags (i.e., about 18%) could fall on the factory scale modifi while the rest was the share of the primary adhesive xadponent. Stein-Hall's effect was measured for each of such compositions after their complete preparation for use. The preparation process is carried out on peers (U.S. Patent 3,355,307) as follows. 250 g of starch product is suspended in 890 ml of water at 40.56 ° C. starch slurry at room temperature for 4.5 min. 75 ml of 4.0% sodium hydroxide solution is added. The reaction is then stopped when the viscosity reaches 600 cps by adding 4.7 g of boric acid. In each case, the final paste represents a juvenile assumption of partially swollen granules. Initially, viscosity is measured at. Tane-Hall, and then each of the ne-compositions is kept for 24 hours at 37, 1, three moderate mixing. The viscosity is similar to that of an everyday composition. The viscosity of pressure-free adhesive compositions is given in TaOl. 2,
    T a C5 l and c a
    权利要求:
    Claims (4)
    [1]
    1. Patent C. 156-292,
    [2]
    2. Patent C. 156-292,
    [3]
    3. Patent class. 106-213,
    [4]
    '4. Patent 40 cells * 156-208,
    ВНИИПИ Order 6657/57 Circulation 684 Subscription
    Branch of PPP Patent *, Uzhhorod, st. Design, '4
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    同族专利:
    公开号 | 公开日
    SE7608293L|1977-01-23|
    ES449994A1|1977-12-16|
    DE2633048A1|1977-03-17|
    AU1571176A|1978-01-12|
    BR7604727A|1977-08-02|
    FR2336462A1|1977-07-22|
    FR2336414A1|1977-07-22|
    NZ181358A|1978-06-20|
    FR2336462B1|1980-06-20|
    NL7608050A|1977-01-25|
    ES461626A1|1978-12-01|
    ES461625A1|1979-01-01|
    DK328976A|1977-01-23|
    AU505900B2|1979-12-06|
    FI762080A|1977-01-23|
    GB1514396A|1978-06-14|
    FR2336414B1|1980-07-04|
    MX145707A|1982-03-25|
    AR222441A1|1981-05-29|
    NO762527L|1977-01-25|
    IE43146B1|1980-12-31|
    IE43146L|1977-01-22|
    JPS5213584A|1977-02-01|
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    JPH0410983B2|1984-04-11|1992-02-27|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US59809375A| true| 1975-07-22|1975-07-22|
    US59809475A| true| 1975-07-22|1975-07-22|
    US59809575A| true| 1975-07-22|1975-07-22|
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