JPS6278270A - Treatment of cloth - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for treating fabric. More specifically, the present invention relates to a method for treating a fabric containing cellulose fibers, the purpose of which is to impart wash and wear properties without reducing the strength of the fabric.

(Prior Art) When cellulose fibers are washed with water and dried, they become hard and wrinkled. Therefore, fabrics made of cellulose fibers cannot remain wrinkle-free and beautiful unless they are ironed after washing. For this reason, cellulose fiber fabrics must be ironed after each wash. However, ironing clothes every time you wash clothes is a hassle. Therefore, attempts were made to improve the garment so that it could be worn as is without ironing.

Fabrics that do not require ironing are said to have wash-and-wear properties because they can be worn immediately after washing with water.

It is known that in order to impart wash-and-wear properties (hereinafter referred to as W-W properties) to a fabric made of cellulose fibers, it is sufficient to perform resin processing. There are various resins that can be used in that case. Among these, N-methylol-based resins, epoxy-based resins, and the like have been widely used. However, no matter which resin is used, the fabric obtained by resin processing has the disadvantage that it has low tear strength and tensile strength, and in the extreme, it becomes easily tearable like paper. Ta. Therefore, there was a desire for a method to impart WW properties without causing a decrease in strength.

In the conventional method described above, it was thought that a decrease in U+ degree occurred because resin processing was mainly performed only on the surface of the fiber. That is, it has been thought that the decrease in elongation occurs because resin processing is not uniformly applied to the inside of the fibers, but only locally on the surface. Therefore, by performing some kind of surface treatment on the fibers before resin processing to reduce the hydroxyl groups in the cellulose molecules located on the surface of the fibers, it is possible to prevent the later resin processing from occurring on the fiber surfaces. An attempt was made. However, in the previous attempts, surface treatment made it difficult for the resin liquid to penetrate during subsequent resin processing, resulting in the drawback that the subsequent resin processing could not be carried out smoothly.

Therefore, until now it has not been possible to impart WW properties without resulting in a decrease in strength. Therefore, this inventor
An attempt was made to develop a method for imparting WW properties without reducing strength.

As a result of research according to the above-mentioned plan, this inventor discovered that W-W
We discovered a treatment agent suitable for imparting properties and developed a method in which cellulose fiber-containing fabric is pre-treated with this treatment agent and then processed with a resin, and we have previously proposed this method. The proposal is described in Japanese Unexamined Patent Publication No. 59-168186 and is already known to the public.

(Problems to be Solved by the Invention) As mentioned above, the proposal described in Japanese Unexamined Patent Publication No. 59-168186 is that, in order to prevent resin processing from being carried out locally only on the surface, cellulose is treated before resin processing. The idea is to pre-treat the fibers with a treatment agent and chemically modify the cellulose fibers before resin processing.

Therefore, it is said that the preliminary treatment must be performed separately from, and even before, resin processing.

Therefore, in order to implement the above proposal, it was necessary to go through the steps of immersing the cloth in a pre-treatment liquid, drying it, heat-treating it, and then immersing it in a resin processing liquid again, drying it, and heat-treating it. That is, it was necessary to repeat the same steps of immersion, drying, and heat treatment for the treatment agent and resin, respectively. For this reason, the above proposition must be met.
Although the product was satisfactory, the method was cumbersome and there seemed to be room for improvement.

The above proposal requires the use of a compound having one or more hydrophilic groups, a long-chain alkyl group, and two or more functional groups in the molecule as a treatment agent. Among them, it is said that the hydrophilic group may be any of a hydroxyl group, a carboxyl group, a sulfonic acid group, a salt thereof, and a polyoxyethylene group. In addition, long-chain alkyl groups are
It is said that any alkyl group having 12 or more carbon atoms is sufficient. The functional group is a group that has the property of reacting with a hydroxyl group in a cellulose molecule, and is specifically limited to a cyclic oxyethylene group and an isocyanate group. Accordingly, the treatment agents disclosed by this proposal cover a wide range. Some of them are soluble in water and some are not.

Such a wide range of compounds can be used because the processing agent and the resin are used in a separate process.
This is because there was no need to consider the relationship with W.

(c) Means for Solving Problem) The inventor has discovered that by selecting an appropriate treatment agent from the wide variety of treatment agents mentioned above, the treatment agent can be applied to the fabric at the same time as resin processing. That is, if a material containing a polyoxyethylene group as a hydrophilic group is used, and moreover, a material containing 60 weight or more polyoxyethylene groups is used, it is included in the resin processing liquid and resin processing is performed. It has been found that it is possible to reduce the number of processing steps and impart WW properties without reducing the strength of the fabric. Also,
It has been found that even though a treatment agent and a resin are used in combination, neither the effect of the treatment agent nor the effect of the resin is significantly reduced, and the same effect as when each is used alone can be brought about. This invention was made based on such knowledge.

This invention provides polyoxyethylene groups containing 60% by weight or more in one molecule, one or more alkyl groups having a carbon number of 12 gA or more, and two or more functional groups consisting of a cyclic oxyethylene group or an isocyanate group. The compound is added to and mixed with a conventionally known resin processing liquid, and the fabric containing cellulose fibers is impregnated with this mixed liquid and heat-treated.
This invention relates to a method for treating fabric.

The treatment agent used in the method of this invention can be said to be a compound having two functional groups, at least an IWJ hydrophobic group, and at least one hydrophilic group in one molecule. Among these, the hydrophilic groups are limited to polyoxyethylene groups, and their content is extremely limited in that they account for 60% by weight or more. The functional group means a cyclic oxyethylene group or incyanate group, and the water dispersion group is a long-chain alkyl group having 12 or more carbon atoms, which is the same as the treatment agent proposed earlier.

A shaped oxyethylene group means: A compound containing a cyclic oxyethylene group can be prepared, for example, by using glycidyl alcohol and etherifying or esterifying it. Incyanate group is -N-C-
0, but for use in the process of the invention it is preferably used in the sodium bisulfite-sequestered form, ie, for example, the form 11-N-C-8O,N a . These functional groups are
It is present at the end of the processing agent molecule.

Long chain alkyl groups are present in the treatment agent in the form of alkyl amines or fatty acid esters or ethers. A long chain alkyl group is one having 12 or more carbons Wi. The long-chain alkyl group may be one in which carbon atoms are connected in a straight chain or may be branched. One or more long-chain alkyl groups may be contained in one molecule of the processing agent.

The polyoxyethylene group has the general formula -(CHt CHt
O) is a group represented by r. The polyoxyethylene group is required to be contained in one molecule at 60% or more. One or more polyoxyethylene groups may be contained in one molecule of the processing agent. The hydrophilic group may be located at the end or in the middle of the molecule of the treatment agent.

Specific examples of the processing agent used in the method of this invention have the following molecular formula. R
3 and R1 represent long-chain alkyl groups, n+ + nt
+ ns + n< represents a positive integer.

(However, n, +n2≧6) The above-mentioned treatment agent has a hydrophilic polyoxyethylene group of 60
Since it contains more than % by weight, it has the property of being easily soluble in water. Therefore, this compound can be used by dissolving it in water. In addition, this treatment agent has two functional groups.
Because the fibers contain more than 1,000 hydroxyl groups, the functional groups bond with the hydroxyl groups in the cellulose molecules and have the property of suppressing the reaction of the cellulose molecules on the fiber surface.

The above-mentioned processing agent preferably has a molecular weight of 4,000 or more and 40,000 or less. The reason is that the molecular weight is 4000
If it is less than this, the treatment agent tends to penetrate into the cellulose fibers too quickly, and the fiber density becomes high, resulting in a hard texture of the fabric. On the other hand, if the molecular weight is 40,000
If it exceeds the processing agent, the number of functional groups per molecule will decrease, and the crosslinking density will become too low, resulting in poor durability. It is an aqueous solution. As the resin, N-methylol resin, epoxy thread resin, etc. are used. The N-methylol resin is, for example, an initial condensate of a urea resin or an initial condensate of a melamine resin.

As mentioned above, the known resin processing fluid uses water as a solvent, but as mentioned above, the processing agent is also water-soluble, so the processing agent is 11! It can be dissolved in fat processing liquid and used as is. Resin processing fluid usually contains 1 resin.
The content ranges from 20% to 20% by weight. In the present invention, a processing agent can be further added to the resin processing solution at a concentration of 1 to 20% by weight and used as an aqueous solution of both. Among these, preferred is the case where the processing agent accounts for 8 to 5% by weight.

Conventionally known resin processing fluids contain catalysts and other various auxiliary agents to help the resin react with cell p-1 molecules in the fibers. For example, they may contain salts such as magnesium chloride or zinc nitrate as catalysts. Even if such substances exist, the processing agent does not cause phase separation.

Furthermore, in terms of processing agents, since the functional groups are easily reactive, there is no need to use a special catalyst, but it is also possible to increase the reactivity by adding catalysts. The catalyst in this case is
It is necessary that the material does not impair the reactivity of the resin for resin processing.

As a catalyst, when the functional group is a cyclic oxyethylene group, a rapidly fluorinating compound such as zinc difluoride is suitable;
If the functional group is an isocyanate group, pA tin compounds such as dibutyltin dilaurate are suitable.

As the cellulose fiber, a fabric made of this is used. Any fabric containing cellulose fibers can be used.

For example, the fabric may be a blend or interweave of cotton and synthetic fibers. In fact, good results have been obtained with blended fabrics of cotton and polyester fibers.

In this invention, a fabric is treated using a mixed liquid obtained by mixing the above-mentioned processing agent and a resin processing liquid.
The conventional resin processing process can be carried out as is. That is, the fabric may be immersed in the mixed solution, dried, and heat treated. For example, immerse the fabric in the mixed solution, take it out, squeeze it to 60-100% with a mangle, and heat it to 70°C to 100°C.
Dry for 0.5-15 minutes at 120°C-180°C.
The treatment is completed by heat treatment for 0.5 to 15 minutes.

According to this invention, a processing agent and a resin are contained in the mixed liquid, and the processing agent contains 60% by weight of polyoxyethylene groups.
Since it contains the above, it is water soluble and has strong penetrating power.
Therefore, it quickly penetrates into the fibers and reacts with the hydroxyl groups of cellulose molecules on the surface, thereby suppressing the reaction between the resin and cellulose molecules on the fiber surface. As a result, the processing resin penetrates into the inside of the fiber and reacts with the cellulose molecules inside, so that the fiber is evenly processed with the resin to the inside. Further, as a result of the treatment agent reacting with cellulose molecules on the fiber surface, the fiber surface becomes smooth and flexible due to the treatment agent. Therefore, according to the present invention, without reducing the strength of the cellulose fiber,
It is possible to impart WW properties to the fibers.

On the other hand, in the conventional method that does not use a treatment agent, the resin processing is not uniformly applied to the inside of the fibers, but only locally on the surface, resulting in a decrease in the strength of the fabric. Therefore, the present invention is superior to conventional methods in that it imparts WW properties to the fabric without causing a decrease in elasticity. In addition, in the previous proposal using a processing agent, it was necessary to pre-treat with a processing agent and then apply resin processing, which required a large number of processing steps and therefore had to be implemented carefully. However, in the present invention, it is sufficient to add a processing agent to the resin processing step, so it is simple and easy to implement. The present invention provides such advantages.

Examples and comparative examples are given below to explain the details of the structure and effects of the present invention. The methods for measuring WW properties and strength in Examples and Comparative Examples are as follows. First, WW property was measured according to JISL 1072 method A, tear strength was measured according to JISL 1096 method D (Pensulam method), and tensile strength was determined according to JIS L 1072 method A.
Measured according to method A (strip method) of L 1096.

'4! Example 1 In this example, a bleached fabric was used in which the warp had 12,323 yarns of 40-count cotton per inch, and the weft had 65 yarns of 40-count cotton per inch. Moreover, the compound (4) was used as the compound.

The above compound (4) is used as a treatment agent, and this treatment agent is
Contains 1% by weight, 8% by weight of a urea resin initial condensate (Sumitex Resin MS-11, manufactured by Sumitomo Chemical Co., Ltd.), and a curing catalyst (Sumitex Accelerator X, manufactured by Sumitomo Chemical Co., Ltd.).
-80) 2.4 times? % and further contains 2% by weight of a softener (ETSURIKI SILICONE AM manufactured by NICCA CHEMICAL CO., LTD.) as a processing liquid.The fabric was immersed in this aqueous solution, and the fabric was dipped with a mangle so that the squeezing rate was 80%. Squeeze at 85℃ 2
It was dried for a minute and then heat-treated at 160° C. for 8 minutes.

Thereafter, the fabric was washed with water and dried to obtain a treated fabric of the present invention.

The WW properties and strength of this treated fabric were measured. For comparison, a similar type of fabric was used and treated with resin in the same manner as above, except that it did not contain compound (4), and then washed with water and dried to obtain an ordinary resin-treated fabric. The WW properties and strength of this ordinary resin-treated cloth were measured.

The results are shown in Table 1 below.

Table 1 From this, it was confirmed that the treated fabric of the present invention had excellent WW properties and a small decrease in strength.

Example 2 In this example, a cotton lawn fabric was used as the fabric, in which 86 threads of 40-count cotton were arranged in the warp and 80 threads of 40-count cotton were arranged in the weft. Moreover, the above-mentioned compound (2) was used as a processing agent.

The processing liquid contains 3% by weight of the compound (2) and contains a urea resin initial condensate (Beccamin 31 manufactured by Dainippon Ink Co., Ltd.).
Contains 8% by weight of 1) and a curing catalyst (manufactured by Dainippon Ink Co., Ltd.).
Contains 12wt% of Catalyst FT), and also contains softener (
Using an aqueous solution containing 2% by weight of Nikka Silicone AM (manufactured by NICCA Chemical Co., Ltd.), the above fabric was immersed in this aqueous solution, squeezed at a squeezing rate of 80%, dried at 85°C for 2 minutes, and then dried for 2 minutes at 85°C.
Heat treatment was performed at 0°C for 3 minutes. Thereafter, the fabric was washed with water and dried to obtain a treated fabric of the present invention.

For comparison, the same type of fabric was resin-treated in exactly the same manner as above except that it did not contain compound (2), and then washed with water and dried to obtain an ordinary resin-treated fabric. The WW properties and strength of these treated fabrics and resin-treated fabrics were measured. The results are shown in Table 2 below.

This confirmed that the treated fabric of the present invention had excellent WW properties and had little decrease in strength.

Example 8 In this example, the same cotton lawn fabric as in Example 2 was used. In addition, the aforementioned compound (1) was used as the treatment agent.

As a processing liquid, a urea resin initial condensate containing 4% by weight of the compound f1) (Sumitex Resin 9 manufactured by Sumikata Chemical Co., Ltd.)
Contains 8% by weight of 01) and 1.6% of curing catalyst (Sumitex Accelerator X-80, manufactured by Sumikata Chemical Co., Ltd.)
Contains a softener (8fuki Kagaku Co., Ltd. Nitsuru Silicon A)
Using an aqueous solution containing 2% by weight of M), the above fabric was immersed in this aqueous solution, squeezed with a mangle to a squeezing rate of 80%, dried at 85°C for 2 minutes, and further heat-treated at 140°C for 8 minutes. I did it. This was washed with water and dried to obtain the treated fabric of the present invention.

For comparison, a normal resin-treated fabric was obtained by using the same type of fabric and resin-processing the fabric in exactly the same manner as above, except that it did not contain the compound fl). The WW properties and strength of these treated fabrics and resin-treated fabrics were measured. The results are shown in Table 8 below.

This confirmed that the treated fabric of the present invention has excellent WW properties and a small decrease in elasticity.

Claims (1)

[Claims] A compound containing in one molecule 60% by weight or more of polyoxyethylene groups, one or more alkyl groups having 12 or more carbon atoms, and two or more functional groups consisting of cyclic oxyethylene groups or isocyanate groups, A method for treating fabric, which comprises adding and mixing a conventionally known resin processing liquid, impregnating a fabric containing cellulose fibers with this mixed liquid, and subjecting the fabric to heat treatment.