JPH11200248A - Processing method of woven or knitted fabric containing cellulosic fiber - Google Patents

Abstract

(57) Abstract: A cellulosic fiber-containing woven or knitted fabric is treated with liquid ammonia, a resin processing agent is applied, and then one or both of a heat calendering treatment and a heat treatment are performed. A method for processing a woven or knitted fabric containing a cellulosic fiber, which comprises performing a water treatment. According to the present invention, an excellent cellulosic fiber-containing woven or knitted fabric having excellent form stability such as wrinkle resistance or shrink resistance even after washing and free from problems such as residual formaldehyde can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a woven or knitted fabric containing a cellulosic fiber, and more particularly to a method for improving the form stability of a woven or knitted fabric containing a cellulosic fiber, such as shrinkage resistance and wrinkle resistance, and formaldehyde. The present invention relates to a method for processing a woven or knitted fabric containing cellulose-based fibers having a low residual formaldehyde even when a system-based resin processing agent is used.

[0002]

2. Description of the Related Art Various resin processing agents and resin processing methods have been studied in order to impart morphological stability such as wrinkle resistance or shrink resistance to cellulosic fiber woven or knitted fabrics. ing.

[0003] By the way, the cause of wrinkles or shrinkage of the dough is that hydrogen bonds in the non-crystalline region of cellulose are broken and deformed by the action of external force or water, and hydrogen bonds are generated again in that state. Is what happens.

[0004] Providing wrinkle-proof or shrink-proofing properties of a fabric by resin processing involves forming cross-links between cellulose molecules by a resin,
Utilizing the fact that the hydrogen bond is hardly broken by the action of external force or water due to the introduction of this crosslinking, and in this case, as a resin processing agent, a method using a so-called cellulose-reactive resin such as a glyoxal resin is used. General.

[0005] However, in the conventional resin processing method, when the amount of resin applied is increased for the purpose of improving wrinkle resistance or shrink resistance, the amount of residual formaldehyde increases. On the contrary, when the amount of resin applied is reduced, A conflicting problem such as a decrease in wrinkle resistance or shrink resistance occurs, and in practice, resin processing is performed within a range in which the contradictory properties of wrinkle resistance or shrink resistance and increase in residual formaldehyde can be compromised.

For example, as a means for preventing the passage of feathers from the duvet, a method of reducing the air permeability of the cotton fabric by high-pressure calendering a cotton fabric for the duvet is adopted. However, cotton fabric is easy to wrinkle,
Washing shrinkage occurs. In this case, when the cotton fabric is treated with liquid ammonia, wrinkles are reduced and shrinkage can be prevented, but when washed, the air permeability increases, and there is a risk of feather passage. On the other hand, if a resin is used in combination, the air permeability can be kept low to some extent even after washing, but it is still not enough, the feel is hard, and the formaldehyde resin is usually used for resin processing as described above, so residual There is a problem of formaldehyde, and there has been a problem that it is difficult to perform resin processing itself in an application where the regulation of residual formaldehyde is strict such as a duvet.

The present invention has been made in order to improve the above circumstances, and gives a woven or knitted fabric containing cellulosic fibers morphological stability such as shrinkage resistance or wrinkle resistance while maintaining practical strength, and has no problem of residual formaldehyde. It is another object of the present invention to provide a method of processing a woven or knitted fabric containing a cellulose-based fiber, which has a good feel and a small change in properties due to washing.

[0008]

Means for Solving the Problems and Embodiments of the Invention The present inventors have conducted intensive studies to achieve the above object, and as a result, after treating a cellulose fiber-containing woven or knitted fabric with liquid ammonia, Imparted, then subjected to one or both of the heat calendering treatment and heat treatment, and finally subjected to hot water treatment, the morphological stability of the woven or knitted fabric is improved, compared to the case where only resin treatment is performed This form stability is remarkably improved, the initial form stability is sufficiently maintained even after repeated washing, and even if a formaldehyde resin is used as a resin processing agent, there is no problem of residual formaldehyde, Was found to be good, and the present invention was accomplished.

[0009] Accordingly, the present invention provides a method for treating a cellulosic fiber-containing woven or knitted fabric with liquid ammonia, applying a resin processing agent, and then performing one or both of a heat calendering treatment and a heat treatment, and Provided is a method for processing a woven or knitted fabric containing a cellulosic fiber, which is characterized by performing a treatment. In this case, depending on the use, it is effective to apply a resin processing agent, perform a heat calendering treatment, and then perform a heat treatment.

According to the present invention, the reason why the form stability performance represented by anti-wrinkling or shrink-prevention is enhanced and the residual formaldehyde is extremely reduced is considered to be as follows. That is, at the same time as the fiber swells due to the liquid ammonia treatment, the crystal structure is changed to cellulose I or II.
To cellulose III. In the present invention, the resin processing is performed while maintaining the fiber in a swollen state, and then further subjected to hot water treatment. By this processing, a more stable crystal structure can be obtained from the cellulose III while maintaining the form formed by the resin processing. Cellulose I or cellulose II
It is believed that the crystal structure can be returned to a more stable structure as compared with the case where the fiber is simply treated with liquid ammonia, and that residual formaldehyde is removed.

Hereinafter, the present invention will be described in more detail.
The method for processing a cellulose-based fiber-containing woven or knitted fabric of the present invention comprises treating a cellulose-based fiber-containing woven or knitted fabric in the following process sequence. (1) Liquid ammonia treatment step (2) Resin processing agent application step (3) Hot calender treatment step (4) Heat treatment step (5) Hot water treatment step In this case, the heat calender treatment step (3) or (4) Heat treatment Any of the steps may be omitted as needed.

The fibers constituting the woven or knitted fabric containing cellulosic fibers include natural fibers or regenerated cellulose fibers such as cotton, hemp, rayon, polynosic, cupra, high-strength regenerated cellulose fibers (for example, Tencel). Also, composite fibers obtained by mixing synthetic fibers such as polyester, acrylic, and nylon with these natural or regenerated cellulose fibers can be used. In this case, the proportion of the cellulosic fiber in the conjugate fiber is generally 20% by weight or more, preferably 40% by weight or more. As pretreatment for these cellulosic fiber-containing woven or knitted fabrics,
If necessary, known treatments such as calcining, desizing, scouring, bleaching and mercerizing can be applied. The woven or knitted fabric may be dyed or printed.

The step (1) of the present invention is a liquid ammonia treatment step, which is a step of impregnating liquid ammonia maintained at a temperature of -33 ° C. or less at normal pressure. As the impregnation method, a method of immersing the woven or knitted material in a liquid ammonia bath, a method of spraying or coating the woven or knitted material with liquid ammonia, or the like can be used. The impregnation time is appropriately selected, but is usually about 5 to 40 seconds. After the liquid ammonia treatment, the ammonia adhering to the woven or knitted fabric is removed by heating.

After the above liquid ammonia treatment, the resin processing agent of (2) is applied. In this case, the resin processing agent may be any one as long as it reacts with a hydroxyl group of cellulose to form a crosslink. Examples of such a compound include aldehydes such as formaldehyde, glyoxal and glutaraldehyde, and diglycidyl. Epoxy compounds such as ethers, polycarboxylic acids such as tetrabutanecarboxylic acid, dimethylol urea, trimethylol melamine,
Cellulose-reactive N-methylol compounds such as dimethylol ethylene urea, dimethylol dihydroxyethylene urea, etc., among them, especially the fibrin-reactive N-methylol compounds are improved in wrinkle resistance or shrink resistance due to resin processing, fabrics It is preferable because the balance with the decrease in strength is good.

The amount of the resin processing agent is preferably 0.5 to 10% by weight, more preferably 1 to 8% by weight, based on the weight of the cellulosic fiber-containing woven or knitted material to be resin-processed. It is. If the addition amount is less than 0.5% by weight, the effect as resin processing may not be sufficiently exhibited,
If it exceeds 8% by weight, the strength may be significantly reduced due to resin processing.

A catalyst can be added to the resin processing agent of the present invention in order to enhance the reaction activity between the above-mentioned resin processing agent and cellulose and to perform resin processing quickly. The catalyst is not particularly limited as long as it is a catalyst usually used for resin processing. For example, fluorinated compounds such as ammonium borofluoride, sodium borofluoride, potassium borofluoride, zinc borofluoride, and magnesium chloride , Magnesium sulfate, and neutral metal salt catalysts such as magnesium nitrate; and inorganic acids such as phosphoric acid, hydrochloric acid, sulfuric acid, sulfurous acid, hyposulfuric acid, and boric acid. These catalysts may be used together with an organic acid such as citric acid, tartaric acid, malic acid or maleic acid as a cocatalyst, if necessary.

[0017] If necessary, an auxiliary agent for promoting the reaction between cellulose and the resin can be added to the resin processing agent. That is, the auxiliary agent has a function as a reaction solvent, such as accelerating the reaction between the resin processing agent and the cellulose, and evenly promoting the reaction in the cross-linking reaction, and further, a function of swelling the cellulose.

Examples of the above auxiliary agents include glycerin,
Polyhydric alcohols such as ethylene glycol, polyethylene glycol and polypropylene glycol, ether alcohols such as ethylene glycol monoethyl ether, diethylene glycol monoethyl ether, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether and diethylene glycol monobutyl ether, dimethylformamide, morpholine, Nitrogen-containing solvents such as pyrrolidone, dimethylacetamide, N-methylpyrrolidone, ethyl acetate, isopropyl acetate,
Esters such as butyl acetate, amyl acetate, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, and γ-butyrolactone.

In the case where the air permeability of a duvet, a down jacket or the like is particularly reduced as the form stability, a finishing agent (clogging agent) can be added to the resin processing liquid. As the finishing agent (filling agent), known materials such as silicone / acrylic resin, silicone / polyurethane resin, acrylic resin, polyurethane resin, and reactive silicone can be used. The solid content is preferably 0.5 to 3% by weight, more preferably 1 to 2% by weight, based on the weight of the cellulosic fiber-containing woven or knitted fabric, and is appropriately selected according to the desired air permeability of the woven or knitted fabric. You.

Further, in addition to the above-mentioned chemicals, a softening agent for adjusting texture, a formalin catcher for reducing the concentration of free formalin, and the like can be added to the resin processing agent of the present invention, if necessary.

In the present invention, the resin processing agent is applied to the woven or knitted fabric containing cellulosic fibers, but the application method is not particularly limited, and a known method such as an ordinary pad dry method or a gas phase reaction (VP reaction) is employed. can do.

In the pad dry method, a woven or knitted material is immersed in a preparation liquid containing a resin processing agent, and then squeezed at a squeezing rate of 40 to 120%.
The moisture is dried at an ambient temperature of about 70 to 100 ° C. If the ambient temperature is lower than 70 ° C., a long drying time is required, and 1
When the temperature exceeds 00 ° C., migration of the resin processing agent occurs, which may cause inconvenience such as uneven distribution of the processing agent.

After the application of the resin processing agent, a heat calendering treatment is performed if necessary. In particular, in a duvet or the like in which a decrease in air permeability is required, the blinding effect is more effectively obtained, and at the same time, the resin reaction proceeds.

This heat calendering treatment can be carried out by a conventional method, usually at a temperature of 120 to 200 ° C. and a nip pressure of 200 to 200.
The conditions are 300 kg / cm, the speed is 5 to 15 m / min, and the conditions can be selected according to the desired air permeability of the woven or knitted fabric.

Next, heat treatment is performed to complete the resin reaction. Here, heat calendering is performed as described above,
If this allows the resin reaction to be sufficiently completed, this heat treatment can be omitted. The heat treatment is performed by heating the woven or knitted fabric at 120 to 170 ° C, preferably 130 to 170 ° C.
At a temperature of ~ 160 ° C for 1-15 minutes, preferably 2 ~ 1
Heat treatment for 0 minutes to generate cross-linking, the temperature and time of this heat treatment depends on the type of resin to be added, the amount of resin used, the type of catalyst, the amount of catalyst added, etc. The reaction progresses slowly, and if it exceeds 170 ° C., inconveniences such as yellowing of the dough may occur.

In the present invention, the hot water treatment is carried out lastly, whereby the anti-wrinkle and shrink resistance of the woven or knitted material achieved by the above-mentioned processes (2), (3) and / or (4) is improved. The representative form stability is remarkably improved, and the form stability is effectively maintained even when washed, and there is no problem of formaldehyde residue caused by the resin processing, and a woven or knitted fabric having a good touch can be obtained. . In this case, if the air permeability is required to be reduced, such as a duvet, this performance is maintained.

Here, the hot water treatment can be carried out by treating the above-mentioned cellulosic fiber-containing woven or knitted fabric with hot water or steam at a temperature of usually 98 ° C. or higher. Specifically, any device capable of performing hot water treatment at high pressure may be used, for example, using a high-pressure liquid jet dyeing machine, a high-pressure paddle dyeing machine, a high-pressure drum dyeing machine, a high-pressure Jigger dyeing machine, a high-pressure beam dyeing machine, a high-pressure steamer, or the like. Depending on the type of the fabric and the application, it can be processed under tension without using a high-pressure liquid dyeing machine, high-pressure paddle dyeing machine, high-pressure drum dyeing machine, or a high-pressure jigger dyeing machine or high-pressure beam. Using a dyeing machine, a high-pressure steamer or the like, it can be carried out while keeping the fabric smooth under slight tension.

In this case, when hot water treatment is performed without tension using a high-pressure jet dyeing machine, a high-pressure paddle dyeing machine, a high-pressure drum dyeing machine, etc., the stress of the woven or knitted structure is relaxed, and the shrink resistance is improved. In addition to the advantage, the set effect of the hot water treatment improves the wet wrinkle resistance, and provides advantages such as imparting a feeling of abrasion and squeezing, and giving a change to the surface feeling.

When hot water treatment is performed under slight tension using a high-pressure beam dyeing machine, a high-pressure jigger dyeing machine, or a high-pressure steamer, the fabric is kept flat during the hot water treatment. There is an advantage that wrinkles and irregularities do not enter the ears, the ears do not wind, and a large amount of processing can be performed at the same time.

The time of the hot water treatment is appropriately selected. Specifically, the conditions of the hot water treatment are preferably as follows. (A) 98 ° C or more and less than 105 ° C: 2 hours or more, preferably 2.5 hours or more (b) 105 ° C or more and less than 115 ° C: 1 hour or more, preferably 1.5 hours or more (c) 115 ° C or more and 125 ° C Less than: 40 minutes or more, preferably 1 hour or more (d) 125 ° C or more and less than 135 ° C: 30 minutes or more, preferably 1 hour or more (e) 135 ° C or more and less than 150 ° C: 20 minutes or more, preferably 1 hour or more The upper limit of the processing time is preferably 5 hours.

In the above-mentioned hot water treatment, a softening agent can be added to the hot water to perform the treatment, whereby the woven or knitted fabric can be imparted with flexibility. As the softener, the composition does not change when treated at a high temperature for a long period of time, as long as it imparts a soft texture.For example, a known compound such as a fatty acid amide condensed compound or a fatty acid ester-based compound may be used. The amount added to the hot water can be 0.1 to 10% by weight, particularly 0.3 to 3% by weight.

[0032] The method of the present invention is suitably adopted for those in which morphological stability of a woven or knitted fabric is required. In this case, the air permeability of the final processed woven or knitted fabric is selected as desired, but in the case of a woven fabric used for a duvet, a down jacket, or the like,
It is preferable that it is 1 cc or more and less than 3 cc. If the air permeability is too low, the feeling of wearing when sweating may be reduced.

[0033]

According to the present invention, an excellent cellulose fiber-containing woven or knitted fabric having excellent form stability such as wrinkle resistance or shrink resistance even after washing and free from problems such as residual formaldehyde can be obtained.

[0034]

EXAMPLES The present invention will be described below in detail with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[Example 1] Using 160/2 cotton yarn, the number of yarns to be driven, 231 warp / 2.54 cm, weft 200 /
5 pieces of 2.54 cm sashimi are burnt, desizing, etc.
After scouring and bleaching, the mixture was treated with liquid ammonia at -34 ° C for 20 seconds, and then the attached ammonia was removed by heating.

Next, the resin processing liquid shown in Table 1 was impregnated, the excess liquid was squeezed out with a mangle, and the amount was adjusted so that the adhesion amount shown in Table 1 was obtained. Subsequently, after drying, 160 ° C. × 200 kg
/ Cm × 5m / min.
Heat treatment was performed at 60 ° C. for 2 minutes. Thereafter, a hot water treatment (130 ° C. × 2 hours) was performed by a winding method, and the film was dried.

[Comparative Example 1] The same woven fabric as in the example was subjected to shaving, desizing, scouring, bleaching and liquid ammonia treatment, then impregnated with a finishing agent shown in Table 1, dried, and then heated under the same conditions as in the example. Calendar processing was performed.

The performance of the woven fabric (fabric for duvet) obtained by the above method was evaluated, and the results shown in Table 2 were obtained.

[0039]

[Table 1] Notes: 1) Riken Resin LNB-20 (manufactured by Miki Riken Kogyo) 2) Catalyst M (manufactured by Dainippon Ink and Chemicals) 3) Charine EFE230 (manufactured by Nissin Chemical) 4) Soft Bon P3000 (manufactured by Takemoto Yushi) 5 ) Finetex NRW (manufactured by Dainippon Ink and Chemicals, Inc.)

[0040]

[Table 2] Note: 6) JIS L1096 A method 7) JIS L1041 B method Acetylacetone method 8) JIS L1096 A method Gurley method 9) JIS L1096 D method Pendulum method 10) JIS L1096 A method Labeled strip method 11) JIS L1059

From the above results, it can be seen that the method of the embodiment shows that the air permeability hardly increases even after washing, and the initial air permeability is almost maintained. It was recognized that there was almost no residual formalin, and that there was no significant change in physical properties, wrinkle resistance and shrinkage even after washing.

Example 2 A No. 40 double thread fir (30 inch, 18 gauge) 100% cotton knit was subjected to alkali treatment and bleaching in a conventional manner, and treated with liquid ammonia for 20 seconds.・ Resin processing under heat treatment conditions, and after performing hot water treatment at 130 ° C. × 1 hour using a high-pressure liquid flow processing machine, dehydrated and dried, processed with a softener using a tenter, and finished to a predetermined width .

Example 3 In Example 2, 5.0 g / ml of a softener (AVIVAN SFC: fatty acid amide condensed compound, manufactured by Ciba Geigy) was added to hot water during hot water treatment.
The same operation as in Example 2 was carried out except that l-added product was used.

Comparative Example 2 Resin processing was performed under the resin formulation and heat treatment conditions shown in Table 3. In this case, this formulation is a formulation in which the amount of resin is reduced because the formalin concentration is kept low.

The performance of the woven fabric obtained by the above method was evaluated, and the results shown in Table 3 were obtained.

[0046]

[Table 3] Note: 12) Riken Resin LNB-20: Cellulose-reactive N-methylol resin (manufactured by Miki Riken Kogyo) 13) Cat. M: Magnesium chloride-based catalyst (manufactured by Dainippon Ink and Chemicals, Inc.) 14) Maycatex HP-780: sewability improver (manufactured by Meisei Chemical Co., Ltd.) 15) Sofmin SN-15: fatty acid ester-based softener (Miyoshi oil and fat) 16) MSW-2: Silicone softener (Matsumoto Yushi Seiyaku Co., Ltd.) 17) Sumitex Buffer FW: Formalin catcher (Sumitomo Chemical Co., Ltd.) 18) PEG-200: Polyethylene glycol (Sanyo Chemical Industries, Ltd.) 19) AVIVAN SFC: Fatty acid amide condensed compound (manufactured by Ciba-Geigy)

As described above, Examples 2 and 3 have better shrink resistance, less residual formaldehyde, and maintain practical strength as compared with Comparative Example 2. In Example 3 in which a softener was added in the bath at the time of hot water treatment, the texture became soft without impairing performance such as shrinkage resistance.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasushi Takagi 45 characters in Miai-cho, Okazaki City, Aichi Prefecture Inside the Nisshinbo Co., Ltd. Miai Plant (72) Inventor Kazuhiko Harada 45 characters in Miai-cho, Okazaki City, Aichi Prefecture Nisshinbo Miai Factory

Claims (3)

[Claims] 1. A method in which a cellulosic fiber-containing woven or knitted fabric is subjected to a liquid ammonia treatment, a resin processing agent is applied, and then one or both of a heat calendering treatment and a heat treatment is performed, and finally, a hot water treatment is performed. A method for processing a woven or knitted fabric containing a cellulosic fiber. 2. The method according to claim 1, wherein a softener is added to the liquid during the hot water treatment. 3. The method according to claim 1, wherein a heat calendering treatment is performed after applying the resin processing agent, and then a heat treatment is performed.