JPS62177286A - Wrinkle imparting processing method - 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 producing textile products that have good hand feel, excellent dimensional stability, and wrinkle fixation properties. More specifically, the tear strength and bending abrasion strength of the fabric are hardly reduced.
The present invention relates to a method of providing obtuse angle wrinkles that are highly flexible.

[Conventional technology]

Although natural fibers and regenerated cellulose fibers have excellent hygroscopic properties, they have the drawbacks of being easily wrinkled and having poor dimensional stability against water. Natural fibers such as cotton are subjected to wrinkle processing to take advantage of the above-mentioned drawbacks.
It has poor ability to retain wrinkles during washing and poor dimensional stability.

Furthermore, there is a method that utilizes a crosslinking reaction with a resin in order to impart wrinkle retention properties. However, although these methods can impart dimensional stability against water to natural fibers and regenerated cellulose fibers, the tear strength, bending abrasion strength, etc. of the fabric, especially in the wrinkled area, decrease due to the crosslinking reaction. As a result of this, the drapability decreases significantly, and the texture becomes rough and hard.

[Problem that the invention seeks to solve]

The present inventors have provided natural fibers and regenerated cellulose fibers with wrinkle retention properties, a highly flexible texture, excellent dimensional stability and drape properties, and also with tear strength. As a result of extensive research into a processing method that hardly reduces bending wear strength, etc., the present invention was achieved.

[Means for solving problems]

That is, in the present invention, after a natural fiber and/or regenerated cellulose fiber fabric is treated to suppress the penetration of a polyurethane elastomer, a solution mainly composed of a polyurethane elastomer is applied, the polyurethane elastomer is coagulated, and then the fabric is rubbed with a cloth. The present invention will be described in more detail below, which is a wrinkle processing method characterized by wrinkle fixing.

Natural fibers used in the present invention, regenerated cellulose fibers,
Cotton, linen, wool, silk, viscose rayon (including polynosic), copper ammonia rayon, and mixtures thereof are available. Among them, cotton, viscose rayon, and copper ammonia rayon are preferable for wrinkle retention. . Moreover, the rutted fiber cloth hanging refers to fabrics such as woven fabrics, knitted fabrics, non-woven fabrics, etc., and is not particularly limited. Furthermore, within the limits that do not substantially impair the characteristics of natural fibers and regenerated cellulose fibers, fibers of other types may be blended, blended, or interwoven.
The permissible mixing limit for other types of fibers is generally 50% by weight or less.

The penetration degree of the polyurethane elastomer in the present invention is
In the thickness direction of the base fabric, the thickness is preferably 1/2 or less,
If it exceeds this range, the tear strength and flexibility of the fabric may decrease, and the wrinkle resistance may decrease.

There are three methods for suppressing the penetration of polyurethane elastomer.

■ Method of applying polyurethane elastomer non-solvent to fabric.

For example, in the case of water, it is 15 to 80 ii based on the absolute dry weight of the fabric.
11%, preferably 20 to 70% by weight. If the moisture content of the fabric is 15% by weight or less, the effect of suppressing the penetration of the polyurethane elastomer solution into the fabric is poor. Moreover, if it is 80% by weight or more, the polyurethane elastomer will coagulate on the surface layer of the fabric, resulting in a rough and hard feel and the polyurethane elastomer coating will be likely to peel off.

As a non-solvent for the polyurethane elastomer, glycerin, ethylene glycol, polyethylene glycol, etc. may be used in addition to the water plate, but water is most preferable for its permeation inhibiting effect.

■ A method of applying a water repellent such as silicone or fluorine to the fabric.

Adhesion t of water repellent to fabric is 0.01 to 1.0% by weight
It is preferable to treat within this range. The amount of water repellent applied is 0.
If the amount is less than 0.01 wt %, the effect of suppressing the penetration of a solution mainly composed of polyurethane elastomer into the base fabric will be poor. Father, 100
If the thickness is higher than t, the penetration suppressing effect is large, but the peel strength is reduced.

■ A method of heat-pressing or calendering the fabric.

For the press treatment, for example, a rotary press machine or a flat press machine is applied, and for the calender treatment, for example, a rotary press machine or a flat press machine is applied.
□ξ Me Calendar Calenders such as felt calenders and iron rolls are applied, and by flattening the fabric through press treatment or calender treatment, penetration of the polyurethane elastomer is suppressed. Pressing or calendering varies depending on the type of fabric, but
o℃, 15-100Kg/cm", 5-50m of fabric
Process in / minute.

In particular, a cold press or cold calender is sufficient for the treatment temperature, but heating up to 180° C. is possible depending on the type and mixing ratio of other fibers mixed with the natural fibers and/or regenerated cellulose fibers.

In the present invention, as described above, a solution mainly containing a polyurethane elastomer is applied to a pretreated fabric.

The concentration of 4-urethane elastomer in the solution mainly composed of polyurethane elastomer used in the present invention is 5 to 5.
The amount is preferably 10 to 30%. If it is less than 5% by weight, sufficient wrinkle retention cannot be obtained. Moreover, if the weight is 50 weight or more, the texture becomes rough and hard, and the tear strength, abrasion strength, etc. are significantly reduced.

The polyurethane elastomer used in the present invention may be of the polyester type or polyether. The polyurethane elastomer solution is used by dissolving a polyurethane elastomer in N,N dimethylformamide, dimethyl sulfoxide, toluene, methyl ethyl ketone, or the like. The polyurethane elastomer coating may be of a perforated type or a non-perforated type having a diameter of 0.5 to 5 μm, but between wet coagulation and dry coagulation, wet coagulation gives a softer texture. In the case of dry coagulation, a foaming agent is added to the polyurethane elastomer solution to foam the polyurethane coating and form fine pores to obtain a soft texture. The blowing agents used include decomposed amorphous blowing agents such as sodium hydrogen carbonate and ammonium carbonate, decomposed organic blowing agents such as azo compounds, nitrone compounds, and sulfonyl compounds, and solvents such as halogenated hydrocarbons, aliphatic or cyclic hydrocarbons. It is a foaming agent.

The method for applying the solution mainly composed of polyurethane elastomer includes a method of contacting the fabric with a belt-like material containing the solution, a method of coating the solution, a method of spraying the solution,
Any immersion method may be used.

Next, a solution mainly containing polyurethane elastomer is applied to the fabric, and then the solvent is removed and solidified using a dry method using hot air drying.

In the present invention, in order to wrinkle and fix the fabric by rolling it, the rolling is carried out in a wet state, and the rubbing device may be any device capable of rolling the fabric, such as a jet dyer, a wince, or a washer. Father, the bath ratio during rubbing treatment is ■=5 to 100.
If it is less than 1:5, the fabric may be seriously damaged, and if it is more than 1:100, a sufficient wrinkle effect may not be obtained. Preferably, the temperature and time of the rubbing treatment are 15 to 120°C for 15 to 90 minutes, and the cloth speed during the rubbing is 20 to 120 m/min.

〔Example〕

The present invention will be further explained below with reference to Examples.

Example 1 Water was sprayed onto a plain woven fabric made of No. 40 double-ply cotton yarn to bring the moisture content of the fabric to over 40% by weight.

The fabric was coated with the following treatment solution, and then heated at 100°C.
The polyurethane elastomer was coagulated by drying and removing the solvent for 5 minutes.

<Treatment liquid> Weight% Weight% Methyl ethyl ketone/toluene = 13/18 16
Water/methyl ethyl ketone = 5015 29
Rezamin X-Crosslinker 1
Subsequently, the fabric was rubbed with an aqueous solution containing 1% by weight of Softex A-1017 (manufactured by Kao Atlas Co., Ltd., bath softener) at a bath ratio of 1:15.80°C for 20 minutes to remove wrinkles. It was coated, dehydrated, and dried.

For comparison, a flat fabric made of No. 40 double thread was
Example 1: Gin AR-2 (manufactured by Sumitomo Chemical Co., Ltd., acrylic acid ester resin) in a rotary washer with a 1% by weight aqueous solution
Wrinkle treatment was performed under the same conditions.

Here, before measuring the various physical properties of the fabric, each sample was left in an atmosphere of 20° C. and relative humidity of 65° C. for 48 hours or more to condition the humidity and use it as a test sample. Father, bending resistance is JIS-L-1076A method (450 cantilever method), wrinkle retention is after washing wrinkle JIS-L-1
096A method (method using an agitating type washer), and the evaluation was carried out by photographing the interference fringes of wrinkles using Moire Topography (manufactured by Fuji Shashinsha Co., Ltd.). Tear strength is JIS-L-1
096D method (Kinjiram method), shrinkage rate is JIS-L-0
Measured using the 217-10 method.

Table 1 shows the physical properties of each fabric obtained as described above. The wrinkle retention shown in Table 1 was evaluated by the number of moire fringes using moire topography as follows. As the number and height of wrinkles increases, the number of moiré contour lines also increases. (See Figure 1) The evaluation criteria for wrinkle retention is 1.
According to the diagram.

(A) shows almost no wrinkles (no moire stripes).

(B) is a state in which obtuse-angled wrinkles have occurred (there are few moiré contour lines and the intervals between contour lines are wide).

(C) is a state in which sharp wrinkles have occurred (there are many moiré contour lines and the intervals between the contour lines are narrow).

From the results in Table 1, the products obtained by the method of the present invention are:
It can be seen that it is flexible, has excellent dimensional stability, wrinkle retention, and has little decrease in tear strength.

Example 2 A plain woven fabric consisting of 120 d of viscose rayon for the warp and No. 40 button cotton single yarn for the weft was calendered at a pressure of 60 h/cm.
It was processed at 20 wL/min.

The fabric was coated with the following treatment solution and then treated with warm water at 20° C. for 15 minutes to wet coagulate the polyurethane elastomer.

<Treatment liquid> Weight% N, N-
Dimethylformamide 50 Then, Softex A-1017 was added to 1% by weight owf bath ratio 1:
10, it was rubbed and wrinkled for 30 minutes at 80°C using a jet dyeing machine.

For comparison, a plain woven fabric without calendering was coated, rubbed, and wrinkled under the same conditions as in Example 2 to provide a comparison sample.

Table 2 shows the physical properties of each fabric obtained as described above. The wrinkle retention was evaluated using the same method as described in Example 1.

From the results in Table 2, the products obtained by the method of the present invention are flexible, have excellent dimensional stability, wrinkle retention, and have a small decrease in tear strength, whereas the comparative products have a significant decrease in tear strength. Yes, the texture is rough and hard.

(The following is a blank space) [Effects of the Invention] According to the present invention, natural fibers and regenerated cellulose fiber fabrics are highly flexible and have obtuse angles without substantially reducing their tear strength, bending abrasion strength, etc. It is possible to provide a fabric that can be wrinkled, has excellent wrinkle retention properties, and has dimensional stability.

In other words, by pre-treating the fabric in advance, the penetration of the polyurethane elastomer can be controlled, and by applying the polyurethane elastomer to the cloth, the once reduced tear strength and bending abrasion strength can be reduced to almost the same as that of the polyurethane elastomer. Recover to the level before granting,
Moreover, it is used to wrinkle and fix the cloth while it is being kneaded. The wrinkles fixed by these methods have obtuse angle wrinkles and are excellent in retaining wrinkles after washing.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of moire fringe contour lines based on moire topography, (AJ is a state with almost no wrinkles, (B)
(C) shows a state in which obtuse-angled wrinkles have occurred, and (C) shows a state in which acute-angled wrinkles have occurred. Patent applicant: Asahi Kasei Industries, Ltd. Figure 1 (A) (B) (C)

Claims (1)

[Claims] After the natural fiber and/or regenerated cellulose fiber fabric is treated to suppress the penetration of the polyurethane elastomer,
Applying a solution mainly composed of polyurethane elastomer,
A wrinkle processing method characterized by coagulating polyurethane elastomer, then rubbing it and fixing the wrinkles.