JPH11124768A - Durable creasing of cellulosic fiber structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for carrying out wrinkling or pleating of a cellulosic fiber structure, capable of imparting wrinkles or pleating excellent in durability to a cellulosic fiber structure without using a finishing agent and accompanying lowering of the strength and capable of applying also to dyed products and printed products. SOLUTION: This method for carrying out durable wrinkling or pleating comprises subjecting a cellulosic fiber structure to liquid ammonia treatment and then carrying out wrinkling or pleating treatment and subjecting the structure to steaming treatment at 98 deg.C to 150 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for durable creasing or pleating a cellulosic fiber structure without using a resin processing agent.

[0002]

2. Description of the Related Art As a method of wrinkling a cellulosic fiber structure, a method of applying wrinkles using a special wrinkling machine has been proposed (for example, Japanese Patent Publication No. Sho 56-5867).
And JP-B-59-39548). However, although the method of the present invention can provide temporary wrinkles, there is a problem that washing durability is lacking.

[0003] A method is also known in which a cellulosic fibrous structure provided with a cellulose-reactive resin or the like is wrinkled with a wrinkling machine or the like, and then the wrinkles are fixed by heat treatment. In many cases, strength is reduced and washing durability is not sufficient.

Further, as a method of improving the washing durability of wrinkling, a refining kiar is filled with about 10% of the total volume of a wrinkled fiber structure, and a cloth or the like is overlaid thereon to perform ordinary refining. Methods are also known. However, in this method, since a refining aid such as caustic soda is used, it is difficult to apply the method to a dyed product or a printed product, and there are drawbacks such as a hard texture.

On the other hand, as a method for pleating a cellulosic fibrous structure, for example, a method is known in which a fibrin-reactive resin or the like is applied to a fabric, pleated, and then heated to set. However, this method has drawbacks in that the strength of the pleated portion is reduced and formalin remains.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide wrinkles or pleats having excellent durability without using a resin processing agent and without reducing the strength of a cellulosic fibrous structure. Another object of the present invention is to provide a method for wrinkling or pleating a cellulosic fibrous structure applicable to dyed or printed products.

[0007]

Means for Solving the Problems and Embodiments of the Invention The present inventors have made various studies to solve the above-mentioned problems. As a result, the cellulosic fibrous structure was treated with liquid ammonia, and then wrinkled or pleated. It has been found that by performing processing and then steaming, it is possible to impart wrinkles or pleats having excellent durability to the cellulosic fibrous structure, thereby completing the present invention.

Hereinafter, the present invention will be described in more detail. In the wrinkling method of the present invention, a cellulosic fibrous structure is subjected to liquid ammonia treatment, followed by wrinkling or pleating, followed by steam treatment. .

Here, examples of the cellulosic fiber structure include structures made of natural fibers or regenerated cellulose fibers such as cotton, hemp, rayon, polynosic, cupra, and high-strength regenerated cellulose fibers (for example, Tencel). Composite fibers obtained by mixing synthetic fibers such as polyester and polyamide with these natural or regenerated cellulose fibers can also be used. In this case, the conjugate fiber preferably has a high content of cellulosic fiber, and the proportion of the cellulosic fiber in the conjugate fiber is generally desirably 50% by weight or more. Structures include textiles,
Knitted fabrics, non-woven fabrics and the like can be mentioned. As a pretreatment for these cellulosic fibrous structures, if necessary, baking, desizing,
Known processes such as scouring, bleaching and mercerizing can be applied. The structure may be dyed or printed.

The liquid ammonia treatment can be carried out, for example, by impregnating the cellulosic fibrous structure with liquid ammonia maintained at a temperature of -33 ° C. or less at normal pressure. As the impregnation method, a method of dipping in a liquid ammonia bath, a method of spraying or coating with liquid ammonia, and the like can be used. Generally, the liquid ammonia impregnation time is suitably from 5 to 40 seconds.

Although it is most common to use liquid ammonia, lower alkylamines such as methylamine and ethylamine may be used in some cases. The liquid ammonia-treated cellulosic fiber structure removes the attached ammonia by heating.

The wrinkling or pleating of the cellulosic fibrous structure may be carried out by using a wrinkling machine or a pleating machine, by hand massaging, or by pushing the cellulosic fibrous structure into a bag, box, or tubular body. It can be performed by a method of wrinkling, a method of binding and squeezing the dough using a thread, a so-called tie-dyeing method, or the like. There are no particular restrictions on the wrinkling machine or pleating machine that can be used here. For example, Japanese Patent Publication No. 52-8920, Japanese Patent Publication No. 56-5867, Japanese Patent Publication No. 59-39548, Japanese Patent Application Laid-Open No. Hei. What is described in 2015573 gazette etc. can be used. In addition, pleating in the present invention,
Pleating in conventional pleating without applying a cellulose-reactive resin or the like.

The steam treatment is carried out by bringing the cellulosic fibrous structure into contact with steam having a temperature of usually 98 to 150 ° C., preferably 98 to 130 ° C. Specifically, a device capable of maintaining wrinkles or pleats in a desired state and capable of performing a steam treatment is preferable, and can be performed by introducing a wrinkled or pleated cellulose-based fiber structure into these devices. it can. This is done by using the can body of a high-pressure container, such as a high-pressure cheese dyeing machine, a high-pressure beam dyeing machine, or a high-pressure liquid jet dyeing machine, which is originally used for other purposes, and installing an appropriate jig in this, or Can be implemented by devising, for example, putting on.

[0014] The time of the steam treatment differs depending on the temperature of the steam and the like, and cannot be unconditionally specified.
Usually 5 minutes to 4 hours, preferably 15 minutes to 2 hours.

[0015] The steam-treated cellulosic fiber structure can be subjected to final finishing such as tentering and texture adjustment as required.

[0016]

According to the method of the present invention, highly durable wrinkles or pleats can be imparted to a cellulosic fibrous structure, and the wrinkles or pleats do not disappear even after repeated washing. Moreover, the method of the present invention does not require the use of alkaline or acidic auxiliaries such as caustic soda and acetic acid, so that it can be applied to dyed or printed cellulosic fiber structures.
Further, the use of a resin processing agent can be eliminated, and in this case, there is an advantage that wrinkles and a decrease in the strength of the pleated portion do not occur.

[0017]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to the following examples.

[Example 1] A 100% cotton 50th plain fabric (warp density: 148 yarns / inch, weft density: 80 yarns / inch) is bleached by a conventional method, and is impregnated with liquid ammonia at -34 ° C for 10 seconds. The liquid ammonia was removed by heating.

Subsequently, it is rubbed by hand and wrinkled to such an extent that a crush-like sharp wrinkle is present in the whole woven fabric. Thereafter, it is subjected to high-pressure steam treatment in a high-pressure high-temperature steamer at a temperature of 130 ° C. for 1 hour, dehydrated, dried and dried with a tenter. Finished.

Comparative Example 1 A treatment was performed in the same manner as in Example 1 except that the high-pressure steam treatment was not performed.

Comparative Example 2 The same treatment as in Example 1 was performed except that the liquid ammonia treatment was not performed.

Wash the fabrics of Examples and Comparative Examples (JIS
After the L1042F2 method), tumble drying was performed, and the degree of wrinkling (visual judgment) was evaluated. Table 1 shows the results.

[0023]

[Table 1]

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Ishikawa 45 characters, Miai-cho, Okazaki-shi, Aichi Pref.

Claims (2)

[Claims] 1. A durable wrinkling or pleating method for a cellulosic fibrous structure, comprising subjecting a cellulosic fibrous structure to liquid ammonia treatment, wrinkling or pleating, and then steaming. 2. The method according to claim 1, wherein the temperature of the steam treatment is 98 to 150 ° C.