JPH04174759A - Processing for softening cloth - Google Patents

Abstract

PURPOSE:To impart a cloth with softness while preventing development of fine, wavy processing wrinkles and/or cloth damages, by introducing a cloth, in such a state as to be subjected to a specified high tension, in between a hot cylinder roll and an endless rubber belt. CONSTITUTION:A cloth F is introduced, in such a state as to be subjected to a high tension of 80-160 (pref. 100-130) kg/m, in between a hot cylinder roll 1 and an endless rubber belt 5.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for softening fabrics used for various clothing or industrial purposes, particularly thin fabrics with a high weave density.

Conventional Technology Traditionally, one of the processing methods for increasing the commercial value of final textile products is softening processing. In addition to mechanical softening methods such as a shrink machine that runs in contact with the fabric, there are also methods that soften the material using a softening agent and chemical methods that reduce the amount of polyester fabric with alkali.

Problems to be Solved by the Invention In recent years, with the development of synthetic fibers, products made of synthetic fibers, or products made of synthetic fibers and blends of synthetic fibers with other fibers, and mixed woven products have been on the market in large numbers for general clothing and industrial use, and have now become necessities. It has become.

However, if the fibers that make up the fabric are 100% or close to 100% synthetic fibers, the fabric is made up of uniform fibers, so it is difficult for fibers to shift, and conventional machines cannot be used to soften these fabrics. Traditional processing methods tend to cause wrinkles, while chemical treatments tend to cause variations in flexibility. In particular, even among synthetic fibers, fabrics made of polyamide-based synthetic fibers are softened by rotation, not only through chemical treatment, but also through physical processing, and taffeta fabrics have the problem of being susceptible to wrinkles during processing.

The present invention is a method using a shrink processing device in which an endless rubber belt runs in contact with a heated cylinder roll, which is highly productive and prevents fine wavy processing wrinkles, generally called rubber marks, from appearing on nylon taffeta or the like. It is an object of the present invention to provide a fabric softening method that can impart flexibility to a fabric without damaging the fabric.

Means for Solving the Problems In order to solve the above-mentioned problems, the fabric softening method of the present invention uses a shrink processing device in which an endless rubber belt runs while being pressed against a part of the circumferential surface of a rotating thermal cylinder roll. When the fabric is introduced between the thermal cylinder roll and the endless rubber belt, the fabric is introduced under a high tension of 80 to 160 kg/m.

Fabrics that can be applied in the present invention include synthetic fibers such as polyamide, polyester, polyolefin, polyacrylonitrile, polyvinyl chloride, and polyvinyl alcohol, cellulose chemical fibers such as rayon and acetate, cotton, and hemp. , cellulose natural fibers such as pulp, etc. alone, blended, blended, mixed knitted fabrics, non-woven fabrics, etc., but it is especially applicable to fabrics made of long fibers, nylon taffeta, etc. to eliminate rubber marks and make them flexible. It is preferable because it exhibits a softening effect.

As the processing device used in the present invention, for example, the first
As shown in the figure, a heat cylinder roll is placed in the center, a pressure roll is placed above the roll, and guide rolls are placed below and behind the roll with their rotating axes parallel to each other, and an endless rubber belt having a predetermined thickness is placed on the back side of the roll. The pressure roll is stretched so that its side is in contact with the pressure roll and each guide roll, and its front side is in contact with at least half the circumferential surface of the heat cylinder roll so that it can run freely, and a rubber layer is provided on the surface of the pressure roll. However, it is preferable to use a shrink processing device that can press the endless rubber belt into contact with the heat cylinder roll so that the thickness becomes about 50%.

In the present invention, by introducing a fabric between the heat cylinder roll of the shrink processing device and the endless rubber belt that is in pressure contact with the heat cylinder roll, the fabric is made to have a diameter due to the expansion and contraction behavior of the surface of the endless rubber belt. It can be pushed in the direction to give a kneading effect and impart flexibility. However, with thin and dense fabrics such as nylon taffeta, wrinkles called minute wavy rubber marks may occur on the fabric surface due to the difference in the coefficient of friction between the endless rubber belt, the thermal cylinder roll, and the fabric, and minute cracks on the surface of the endless rubber belt. Occur. To counter this, methods have been taken such as absorbing moisture into the fabric, uniformly drying it, changing the temperature of the heat cylinder, and even lowering the pressure of the pressure roll, but it has not been possible to obtain sufficient flexibility for materials such as nylon taffeta. No conditions were found that would prevent rubber marks from appearing.

The inventors of the present invention have conducted extensive research to solve such problems, and have found that when introducing the fabric into the above-mentioned shrink processing device, the tension is 80~3 times the normal tension of 30~60 kg/m.
Discovered a fabric softening method that eliminates drawbacks such as rubber marks by applying a high tension of 160 kg/m to the fabric, which is flexible and hardly exhibits dimensional changes in the length direction. It was. In particular, the effects of the present invention are particularly noticeable in polyamide-based nylon taffeta and fill having a high weave density.

In general, the tension applied in the continuous processing process is usually carried out at a low introduction tension so that the fabric is not stretched as much as possible, and the tension is usually adjusted to a level that does not cause slack or wrinkles in the edges of the introduced fabric. It applies tension. Generally, this tension is adjusted within the range of 30 to 60 kg/m.

The high tension employed in the present invention is 80 to 160 kg/m, but if it is less than 80 kg/m, wrinkled rubber marks are likely to occur, and if it is more than 160 kg/m, it is preferable because it will damage the machine or the processed fabric. do not have. Preferably 10
0 to 130 kg/m.

Effect: With the above configuration, if the fabric is introduced between the heat cylinder roll and the endless rubber belt while a high tension of 80 to 150 kg/m is applied to the fabric, minute wrinkles called rubber marks will be formed on the fabric. The fabric can be softened without forming.

Example The present invention will be explained in detail below.

FIG. 1 is a schematic side view showing an example of a shrink processing apparatus used in the present invention. In Fig. 1, the thermal cylinder roll 1
A pressure roll 2 is disposed above and close to the roller so that its axis of rotation is parallel to the pressure roll 2, and guide rolls 3.degree. 4A and 4b are disposed similarly close to and below and behind the roller. The pressure roll 2 and each guide rail 3.4A, 4B
An endless rubber belt 5 having a predetermined thickness is stretched so that the back side thereof is in contact with the belt, and the front side is in contact with approximately half the circumferential surface of the thermal cylinder roll 1 so as to be freely runnable.

A rubber layer 2a is provided on the surface of the pressure roll 2, and the endless belt 5 is sandwiched between the pressure roll 2 and the heat cylinder roll 1 so that the thickness thereof is In~50%. 6A and 6B are fabric introduction guide rolls, 7 is a fabric lead-out roll, and 8 is an introduction tension adjustment device.

In the above device, the fabric F is applied with a predetermined tension by an introduction tension adjustment device 8, and is passed through a fabric introduction guide roll 6, and rotates between a thermal cylinder roll 1 and an endless rubber belt 5.
The fabric is introduced into the press-contact part between the belt and the elasticity of the surface of the endless rubber belt is used to impart flexibility.
It is derived by

Next, a specific example of the present invention using the above-mentioned apparatus will be described.

Example 1 In the shrink processing apparatus shown in FIG. 1, an introduction tension adjustment device 8 using a powder brake is installed at the introduction part of the fabric,
Thermal cylinder roll 1 has a diameter of 300 mm and a width of 2000 mm.
, the pressure roll 2 has a diameter of 330 mm.

The rubber layer 2A has a thickness of 50-1 and a width of 2000 mm, and the endless rubber belt 5 has a thickness of 50 mm, a width of 1800 mm, and a circumference of 39 mm.
Using a 50 mm device, softening processing was performed using dyed and set nylon taffeta with a single fiber fineness of 2 denier and a basis weight of 70 g/rrf. That is, under the conditions that the temperature of the thermal cylinder roll 1 is 120° C., the speed is 15 m/min, and the thickness of the endless rubber belt 5 is 40 mm (8Q%), a tension of 120 kg/m is applied to the nylon taffeta using the tension adjusting device 8. The heated cylinder roll 1 is introduced into the pressure contact part between the endless rubber belt 5 and processed, and then the fabric is introduced into the roll 7 for leading out the fabric.
The tension was adjusted and taken out, and a softened fabric was produced without any rubber marks or damage.

For comparison with this example, the following comparative example was processed.

Comparative Example 1 Using the same nylon taffeta as used in Example 1 above, a softening process was performed under the same conditions as Example 1, except that the introduced tension was 30 kg/m. As a result, although the nylon taffeta was softened, the surface had latitudinal wrinkles and could not be used as a product.

Effects of the Invention As described above, the fabric softening method of the present invention is highly flexible and can also provide an anti-shrink effect at the same time, and does not cause minute wrinkles called rubber marks, which can damage the fabric. Therefore, it is possible to easily obtain fabrics suitable for lining materials for clothing and interior materials for industrial purposes.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing essential parts of an example of a shrink processing apparatus used in the present invention. 1... Heat cylinder roll, 5... Endless rubber belt, 8... Introducing tension adjustment device. Agent Yoshihiro Morimoto-10=

Claims (1)

[Claims] 1. When introducing a fabric between the endless rubber belt and the thermal cylinder roll of the shrink processing device in which the endless rubber belt runs while being pressed against a part of the circumferential surface of the rotating thermal cylinder roll, the fabric is A fabric softening method characterized by introducing the fabric under a high tension of ~160 kg/m.