JPH0559664A - Method for resin finishing of fiber product - Google Patents

Abstract

PURPOSE:To enable a resin finishing method of fiber product of providing the fiber product with flexibility, high wrinkle preventing ability and shrink preventing ability without lowering strength in subjecting a cellulosic fiber product to resin finishing with formaldehyde vapor by using a polyhydric alcohol having a specific boiling point. CONSTITUTION:A cellulosic fiber-containing fiber product is immersed, for example in an aqueous solution of a polyhydric alcohol having >=150 deg.C boiling point (preferably ethylene glycol or polyethylene glycol having 90-5,000 molecular weight), uniformly dried, the cloth is exposed to formaldehyde vapor, then provided with a catalyst such as sulfur dioxide gas, heat-treated, and crosslinking bond of cellulose molecules with formaldehyde is caused and the amount of the remaining formaldehyde is suppressed to a low content to provide the cellulosic fiber-containing fiber product with excellent wrinkle preventing properties and shrink preventing properties without reducing strength.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin processing method for imparting wrinkle resistance, shrink resistance, and permanent pressing to a fiber product containing a cellulosic fiber, and more specifically, it is exposed to formaldehyde vapor and the presence of a catalyst. The present invention relates to an improved resin processing method for a textile product which is heat-treated below.

[0002]

BACKGROUND OF THE INVENTION For the purpose of imparting permanent wrinkle resistance, shrink resistance, and pressing by treating a cellulosic fiber-containing product such as cotton or cotton blend with formaldehyde to cause permanent cross-linking of cellulose molecules. Many methods have been proposed. However, these methods tend to lack reproducibility because it is difficult to control the cross-linking reaction with formaldehyde. That is, if the modification is not sufficient, wrinkle resistance, shrinkage resistance, etc. are not satisfied, and if the modification proceeds too much, the texture may become hard and the strength may be significantly reduced. In addition, these methods required persistent soaping to reduce the residual formaldehyde. In order to solve this problem, the moisture content of the cellulose fiber-containing product is adjusted before the formaldehyde treatment, or steam is introduced during the treatment to control the moisture present in the cellulosic material during the formaldehyde-cellulose reaction. There is a way to try. These methods allow cross-linking with formaldehyde in a state where the cellulose fibers are swollen, so that modification with less decrease in strength is possible, however, it is difficult to accurately control water content in the cellulose fibers, and rather water content There is a problem that the difference in the rate affects the variation in reforming. Further, repeated soaping has a problem in that the processing steps become complicated and the cost increases, and in particular, in the processing of sewn products, simplification of soaping is desired.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and in the steam treatment of formaldehyde, cellulose fiber-containing products have a high degree of wrinkle resistance, shrink resistance, permanent press and excellent properties. The purpose of the present invention is to reduce the strength (w & w property) after washing, to give a soft texture, and to keep the residual formaldehyde low.

[0004]

The present invention achieves the above object and has the following structure. That is, the present invention is a resin processing of a fiber product, characterized in that when a fiber product containing a cellulosic fiber is exposed to formaldehyde vapor and heat-treated in the presence of a catalyst, a polyhydric alcohol having a boiling point of 150 ° C. or higher is used in combination. The method is the gist. Hereinafter, the present invention will be described in detail.

The cellulosic fibers referred to in the present invention are cotton,
Natural cellulosic fibers such as hemp, regenerated cellulosic fibers such as rayon and polynosic, and fiber products include cotton,
It means a thread, a woven fabric, a knitted fabric, a non-woven fabric, a sewn product and the like, and these fiber products may be cellulosic fibers alone or a mixed product with other fibers such as synthetic fibers.

The polyhydric alcohol used in the present invention has a boiling point of 150 ° C. or higher, and is, for example, glycerin, ethylene glycol, diethylene glycol, polyethylene glycol or polypropylene glycol, and other alkylene having an ethyleneoxy group and a propyleneoxy group. Such as glycol. The polyhydric alcohol used in the present invention preferably has a molecular weight in the range of 60 to 6000. More preferably, the molecular weight is 90 to 500.
It is 0.

The amount of the polyhydric alcohol used in the present invention is usually 0.1 to 10% by weight based on the weight of the fiber to be treated. In this case, if the amount is less than 0.1% by weight, the effect of the present invention is low. Further, even if it exceeds 10% by weight, not only the effect corresponding thereto is not obtained, but also it is not preferable in terms of feel, which is not desirable. These polyhydric alcohols may be used alone or in combination of two or more.

In the present invention, the polyhydric alcohol may be applied to the product to be treated by any method as long as the polyhydric alcohol is uniformly attached to the cellulose fibers. Any time before exposure to formaldehyde vapor. Therefore, in the woven or knitted state, an aqueous solution of polyhydric alcohol is applied by a normal pad-dry method or the like so that a necessary amount of polyhydric alcohol adheres, and then formaldehyde vapor treatment is performed as it is, or after fabric cutting and sewing, formaldehyde is formed. It may be steamed. Alternatively, the product obtained by cutting and sewing the cloth may be sprayed with an aqueous solution of a polyhydric alcohol so that a necessary amount of the polyhydric alcohol may adhere to the product and subjected to formaldehyde vapor treatment. Further, when applying the polyhydric alcohol, a softening agent for fiber processing, a sewability improving agent and the like (polysiloxane, polyethylene emulsion, etc.) may be applied at the same time or before the application.

The formaldehyde vapor treatment in the present invention can be carried out by a usual method, and the catalyst used can also be a usual catalyst and is not particularly limited. For example, a product to which a required amount of polyhydric alcohol has been added has a moisture content (4 to 20% based on the weight of cellulose fiber in the product) that is considered preferable for formaldehyde vapor treatment.
After adjusting to, and exposing to formaldehyde vapor, apply a catalyst such as sulfurous acid gas and hydrogen chloride gas, and the temperature is 50 to 160 ° C.
It is a method of heat treatment in. Alternatively, a method of applying the catalyst before exposing it to formaldehyde vapor may be used.

According to the resin processing method for a fiber product of the present invention, the cross-linking of cellulose molecules by formaldehyde is caused in a state where the polyhydric alcohol penetrates into the cellulose fiber, so that the product containing a cellulose fiber is highly protected. Wrinkle resistance, shrink resistance, permanent press and excellent appearance after washing (W & W property) can be imparted with a low softening strength, a soft texture, and a low residual formaldehyde. In addition, in terms of wrinkle resistance, the effect of improving wrinkle resistance particularly when wet is remarkable, and even in the appearance after washing, it is easy to achieve 3.5, which was very difficult to achieve with conventional 100% cotton. You can

[0011]

EXAMPLES The present invention will be described in more detail below with reference to examples, but various performances in the examples were measured by the following methods. (A) Wrinkle resistance Compliant with JIS L-1096 B method (Monsanto method) (b) Tear strength Compliant with JIS L-1096 D method (Pendulum method) (c) Bursting strength JIS L-1018 A method (Mullen type method) ) (D) Appearance of washing JIS L-1096 A method (method using a stirring type washing machine) ・ Conforming to line drying (e) Amount of free formaldehyde JIS L-1041 Conforming to acetylacetone method

Example 1 After scouring and bleaching, Hakkol BRK having a solution concentration of 0.4%
A cotton broad cloth using a # 40 cotton thread dyed with (Showa Kagaku Co., Ltd. fluorescent dye) was immersed in an aqueous solution of polyethylene glycol (average molecular weight 1000) having a solution concentration of 5%, and then uniformly squeezed with a mangle. The draw ratio at this time was 70%. Then, it is dried at 105 ° C for 2 minutes, and then in an environment (25 ° C,
The humidity was adjusted to 65% RH). Then put the cloth in the reactor,
It was exposed to formaldehyde vapor generated from paraformaldehyde for 4 minutes. The temperature of the reactor during the exposure was 45 ° C. Subsequently, sulfurous acid gas was introduced into the reactor to expose the cloth, and then the temperature of the reactor was raised to 150 ° C. for curing. Steam was then poured into the reactor and the fabric was exposed for 2 minutes.

Comparative Example 1 Comparative Example 1 was carried out in the same manner as in Example 1 except that the polyethylene glycol aqueous solution was not immersed.

Example 2 Example 2 was carried out in the same manner as in Example 1 except that 3% of POLON MF-7 (manufactured by Shin-Etsu Chemical Co., Ltd.) as a softening agent was added to the polyethylene glycol aqueous solution.

Example 3 Sumifix Supr having a solution concentration of 1% after scouring and bleaching
a Blue BRF (a reactive dye manufactured by Sumitomo Chemical Co., Ltd.) is used to fabricate a cotton cloth using a 60th cotton yarn and a polyalkylene glycol (ethyleneoxy group: propyleneoxy group = 30: 70 (weight ratio)) having a solution concentration of 2%. Molecular weight about 370
0) Immersed in an aqueous solution, and then squeezed uniformly with a mangle.
The draw ratio at this time was 95%. Then, it was dried at 105 ° C. for 3 minutes and conditioned under the environment (25 ° C., 65% RH). The cloth was then placed in the reactor and exposed to formaldehyde vapor generated from paraformaldehyde for 6 minutes.
The temperature of the reactor during exposure was 55 ° C. Sulfurous acid gas is then introduced into the reactor to expose the cloth, and then
The temperature of the reactor was raised to 150 ° C. for curing.
Steam was then poured into the reactor and the fabric was exposed for 2 minutes.

Comparative Example 2 Comparative Example 2 was carried out in the same manner as in Example 3 except that the polyalkylene glycol aqueous solution was not immersed.

Example 4 The same treatment as in Example 4 was carried out except that 0.3% of Mecatex HP-600 (manufactured by Meisei Chemical Co., Ltd.) was added to the polyalkylene glycol aqueous solution as a sewing aid in Example 3. did. Table 1 shows the measurement results of various physical properties of the obtained processed product.

[0018]

[Table 1]

[0019]

Industrial Applicability According to the resin processing method of the present invention, there is little reduction in mechanical strength, and high degree of wrinkle resistance, shrink resistance, flexibility,
Further, it is possible to obtain a textile product having an excellent appearance (W & W property) after washing and having less residual formaldehyde.

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Claims (1)

[Claims] 1. A resin processing of a fiber product, which comprises using a polyhydric alcohol having a boiling point of 150 ° C. or more when exposing a fiber product containing a cellulosic fiber to formaldehyde vapor and heat treating the same in the presence of a catalyst. Method.