JPH08269872A - Production of fiber structural material having shape stability - Google Patents

Abstract

PURPOSE: To obtain a fiber structural material having excellent shape stability without lowering of strength, and further having excellent feeling and hygroscopicity. CONSTITUTION: A mercerizing treatment is applied to yarn containing cellulosic fibers with an aqueous solution of caustic alkali, and cloth or fabric is woven or knitted by using the resultant mercerized yarn, and a resin is applied to the resultant cloth or the fabric. Otherwise, the mercerizing treatment is applied to the yarn containing cellulosic fibers with the aqueous solution of caustic alkali, and cloth or fabric is woven or knitted by using the resultant mercerized yarn, and the mercerizing treatment is re-applied to the resultant cloth or fabric again, then the resin is applied to the resultant cloth or fabric.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber structure having shape stability, that is, wrinkle resistance, W & W property and shrink resistance.

[0002]

2. Description of the Related Art Fiber structures, such as cellulosic fibers or fiber structures composed of cellulosic fibers and polyester staple fibers, are widely used for clothes and the like. It is required to have a property of removing wrinkles generated during wearing or washing and a property of not shrinking during washing without any additional operation.

Such performance is called morphological stability,
Clothes with shape stability are less likely to wrinkle when worn,
It can be worn without ironing after washing and is easy to handle without shrinking after washing. Thus, various processes have been conventionally performed for imparting morphological stability to a cellulosic fiber or a fiber structure composed of a cellulosic fiber and a polyester staple fiber.

For example, a resin processing method in which a cellulosic fiber-reactive resin is applied and a dry heat treatment is performed with an acidic catalyst. A method in which N-methylol acrylamide resin is used for wet crosslinking with a polymerization catalyst and then dry crosslinking with a condensation catalyst (JP-B-36-3142). A method in which N-methylol resin is used, and after drying, a strong acid such as hydrochloric acid is used as a catalyst, water is added, and then batch-up is performed to perform moist cure (JP-A-
No. 198). There is a method (US Pat. No. 3811834-1974, JP-A-51-60799) in which N-methylol resin is used to perform resin processing at a low pickup rate by one-side processing or MA process.

[0005]

However, such conventional methods have various drawbacks. That is, the fiber structure treated in the usual preparatory step, which has been subjected to the above-mentioned processing, has a large degree of decrease in strength, sufficient morphological stability cannot be obtained, and a soft texture can be obtained. It has the drawback of not having it. Therefore, in a fiber structure composed of a cellulosic fiber and a polyester staple fiber, the mixing ratio of the polyester fiber is increased to reduce the amount of the resin to obtain a swelling feeling and to improve the shape stability. However, polyester has a drawback that it is uncomfortable to wear due to its low hygroscopicity. Further, in a fiber structure composed of a cellulosic fiber or a cellulosic fiber and a polyester staple fiber, in order to improve the morphological stability in resin processing, after performing mercerization treatment with a caustic aqueous solution in a woven or knitted state. Resin processing has been performed, but if the mercerization treatment is performed in the state of woven or knitted fabric,
Due to the slow penetration rate of caustic alkali into the cellulosic fibers and tension in the warp or weft direction,
It is difficult for the cellulosic fibers to swell uniformly without being constrained, and the mercerization treatment becomes non-uniform, so that the strength of the fiber structure is greatly reduced during resin processing.

The present inventors have arrived at the present invention as a result of intensive investigations aimed at improving such a conventional technique. That is, an object of the present invention is to provide a method capable of obtaining a fiber structure which is excellent in morphological stability, has no decrease in strength, and has good feeling and hygroscopicity.

[0007]

In order to achieve the above object, the present invention has the following arrangement. That is, the first invention is to mercerize a cellulosic fiber-containing yarn with an aqueous solution of caustic alkali, weave or knit a woven or knitted fabric using this yarn, and then woven or knit the woven or knitted fabric. A gist of the present invention is to provide a method for producing a fiber structure having morphological stability, which is characterized by applying a resin, and a second aspect of the invention is to mercerize a yarn containing cellulosic fibers with a caustic aqueous solution. And weaving or knitting a woven fabric or knitted fabric using this yarn, and then subjecting this woven fabric or knitted fabric to mercerization treatment again with an aqueous caustic alkali solution, and then applying a resin. The gist is a method for producing a fiber structure having morphological stability.

The present invention will be described in detail below.

Examples of the cellulosic fibers used in the present invention include natural cellulosic fibers such as cotton and hemp, and regenerated cellulosic fibers such as rayon, cupra, polynosic and purified cellulosic fibers (trademark: Tencel). Such cellulosic fibers may be used alone or in a mixture with other fibers by blended spinning or interwoven knitting, and in the case of admixture, it is desirable to contain 50% by weight or more of the cellulosic fibers.

The yarn made of such cellulosic fibers is first subjected to mercerization treatment with a caustic aqueous solution. As caustic, sodium hydroxide, potassium hydroxide,
Lithium hydroxide, rubidium hydroxide, cesium hydroxide and the like can be used, but sodium hydroxide is generally used. The temperature of the caustic aqueous solution is 0 to 50 ° C,
The temperature is preferably 10 to 40 ° C., and the concentration of the caustic aqueous solution is 100 to 300 g / l, preferably 150 to 25.
It is 0 g / l. The mercerization treatment is carried out by applying such caustic alkali to the yarn by the mercerization method of warp, the warp mercerization method, the single-ended mercerization method, etc., and then removing the caustic alkali with a shower, open soaper, etc. . When it is difficult to remove by washing with water, an acid such as hydrochloric acid, sulfuric acid or acetic acid having an appropriate concentration may be used as an alkali removing agent.

The mercerized yarn is then woven or knit into a woven or knitted fabric by known methods.

The woven or knitted fabric or knitted fabric is then subjected to scouring and bleaching by a known method, and then a resin is applied thereto. As the resin used in the present invention, a reactive resin that reacts with cellulose fibers, such as glyoxal resin,
Dimethylol dihydroxyethylene urea, dimethylol propylene urea, dimethylol urone, dimethylol triazone, dimethylol ethylene urea, etc., using a water-soluble urethane prepolymer having a blocked isocyanate group that regenerates two or more isocyanate groups, In addition to the resin, a catalyst and, if necessary, a softening agent, a toughening agent, a texture adjusting agent, a dye fixing agent and the like may be used. The applied amount of the resin may be appropriately selected according to the use of the fiber structure, but is preferably 2 to 20% by weight based on the weight of the fiber structure, and is applied to at least one surface of the fiber structure by a pad method, a kiss roll method, or the like. . As is known for resins, 130-180
It is heated at about ℃ and crosslinked to fix it to the fiber structure and apply it.

In the second aspect of the invention, before the above-mentioned resin processing, the mercerization treatment is performed again with a caustic aqueous solution. Regarding the type of caustic alkali, the concentration of caustic alkali, and the humidity, the same conditions as in the case of subjecting the yarn to mercerization can be adopted. The mercerization treatment is carried out by applying caustic alkali to a woven or knitted fabric by a continuous method or the like, tensioning the fabric if necessary, and then removing the caustic alkali by washing with a shower, open soaper, wince or the like. When it is difficult to remove by washing with water, an acid such as hydrochloric acid, sulfuric acid or acetic acid having an appropriate concentration may be used as an alkali removing agent.

[0014]

[Function] When a mercerization treatment is applied to a yarn containing a cellulosic fiber with an aqueous solution of caustic alkali, the caustic alkali rapidly penetrates into the cellulosic fiber, and since tension in the warp or weft direction is small, The cellulosic fibers become uniformly and sufficiently swelled without being bound. Therefore, since the mercerization treatment is performed uniformly, the strength of the woven or knitted fabric is not lowered, and since it is sufficiently swollen, it is less likely to bend and wrinkle resistance is improved. Then, when a woven or knitted fabric is further woven or knitted using such a yarn and then subjected to a mercerization treatment with a caustic aqueous solution, the cellulosic fibers are further swelled uniformly and sufficiently. Be encouraged.

[0015]

EXAMPLES The present invention will be described in detail below with reference to examples, but the invention is not limited thereto. The test method which is the basis of the numerical values in the examples is as follows. (1) W & W property JIS L-1096 A method (dumble dry) (2) Wrinkle resistance JIS L-1096 B method (dry wrinkle) (3) Tear strength JIS L-1096 A method (strip method) (4) Tensile strength JIS L-1096 D method (Pendulum method) (5) Washing shrinkage ratio JIS L-1042 F method

Example 1 A spun yarn (100-count single yarn) made of 100% cotton was dipped in a 200 g / l sodium hydroxide aqueous solution at room temperature for 2 seconds by a single-ended mercerization method, and then squeezed with a mangle having a drawing rate of 80%. Dried, washed and dried. Using this yarn, a plain woven fabric having a warp density of 140 yarns / inch and a weft yarn density of 80 yarns / inch was woven. After that, the plain woven fabric is scoured by a known method and exposed, and then glyoxal resin (Sumitex resin NS
-19, Sumitomo Chemical Co., Ltd., active ingredient 45%) 200g
/ L, magnesium chloride salt complex salt catalyst (Catalyst G, Dainippon Ink and Chemicals, Inc., active ingredient 25%) 60
g / l, nonionic softening agent (SNX-9, manufactured by Yushisha Kogyo Co., Ltd.) 10 g / l, formalin catcher (Finetex FC-K, manufactured by Dainippon Ink and Chemicals, Inc.) 10
The treatment liquid consisting of g / l was padded at a pick-up rate of 80% and dried at 100 ° C for 2 minutes, then 150 ° C.
Then, the product was heat-treated for 3 minutes under dry heat to obtain the product of Example 1.

Example 2 In Example 1, after scouring and bleaching, the plain woven fabric was continuously immersed in 200 g / l sodium hydroxide aqueous solution at room temperature for 2 seconds, squeezed with a mangle having a squeezing ratio of 80%, and washed. A product of Example 2 was obtained by performing the same process as in Example 1 except that the mercerization treatment of drying was added.

Comparative Example 1 A plain fabric having a warp density of 140 yarns / inch and a weft yarn density of 80 yarns / inch was woven using spun yarn (50-count single yarn) made of 100% cotton which was not subjected to mercerization treatment. .
After that, the plain woven fabric was scoured by a known method, exposed, and then dipped in a 200 g / l sodium hydroxide aqueous solution at room temperature for 2 seconds by a continuous method, squeezed with a mangle having a squeezing ratio of 80%, washed and dried, Thereafter, the same resin as in Example 1 was applied, and Comparative Example 1
Got the product.

Table 1 shows W & W properties, wrinkle resistance, tear strength, tensile strength and shrink resistance of the products obtained in Examples 1 and 2 and Comparative Example 1.

[0020]

[Table 1]

As is clear from Table 1, the products obtained in the Examples, that is, the products mercerized in the yarn state, have excellent W & W property, wrinkle resistance, shrink resistance, and little decrease in strength. I understand.

[0022]

As described in detail above, the fiber structure obtained by the method of the present invention is excellent in wrinkle resistance and W & W property, does not shrink by washing, does not decrease in strength, and has a good texture. Therefore, it is very useful for casual uses such as shirts, blouses, pants, and uniforms.

Claims (2)

[Claims] 1. A yarn containing a cellulosic fiber is subjected to a mercerization treatment with a caustic aqueous solution, a woven fabric or a knitted fabric is woven or knitted using this yarn, and then the woven fabric or the knitted fabric is coated with a resin. A method for producing a fiber structure having morphological stability, which comprises providing the fiber structure. 2. A yarn containing cellulosic fibers is subjected to a mercerization treatment with a caustic aqueous solution, a woven fabric or a knitted fabric is woven or knitted using this yarn, and then the woven fabric or the knitted fabric is subjected to a caustic aqueous solution. In the mercerization process again,
A method for producing a fiber structure having morphological stability, which comprises applying a resin thereafter.