JP3477507B2 - Woven and knitted cotton with special feathers and method for producing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cotton woven knitted fabric having peach skin touch and a method for producing the same.

[0002]

2. Description of the Related Art The conventional method for giving a peach skin touch to a woven or knitted cotton has been limited to a method using emery paper or needle cloth. However, in order to obtain a peach skin touch by this method, it was necessary to nap the engine mounting bracket or needle cloth having a fine mesh 4 to 5 times. Moreover, the peach skin touch was completely unsatisfactory.

In Japanese Patent Laid-Open No. 6-200269, a woven or knitted material made of cellulosic fibers is raised using 50-300 mesh emery paper and then 100-350 g /
l alkali metal hydroxide aqueous solution, and then,
A method of raising using an emery paper of 400 to 800 mesh is proposed. However, this method is quite complicated and time-consuming, and its peach skin touch is also insufficient.

Further, in JP-A-6-235175, a regenerated cellulosic fiber structure and a lump having a rough surface harder than the fiber structure are packed together in a bag and kneaded with a washer using a cellulase enzyme solution. It is processing. This aims to obtain a stone wash tone and a peach skin touch at the same time. However, although this method is directed to regenerated cellulosic fiber structures, it cannot include woven or knitted cotton.

[0005]

SUMMARY OF THE INVENTION The present invention addresses the above-mentioned situation, and in particular, a woven or knitted cotton fabric is subjected to the required processing, and is a cotton fabric with a special feather having an excellent peach skin touch texture. The purpose is to provide a woven or knitted fabric.

[0006]

Means for Solving the Problems That is, the characteristics of the present invention which meet the above-mentioned object are a cotton having a lamella formed by peeling off a part of the lamella layer of a cotton fiber surface layer which is under-exposed or mercerized. A woven or knitted fabric, wherein the lamella has an apparent width in the range of 0.01 to 20 µ, and has various apparent widths within the range infinitely, and the length thereof is 100 µ or less. The presence density of lamellas in the above is 300 lines / cm ² or more. The present invention also provides a cotton fiber by the first step of reducing the tensile strength retention rate to a range of 30 to 70% by treating the woven or knitted cotton woven or knitted fabric finished with mercerization with a cellulase enzyme and the subsequent rubbing action. And a second step of peeling off a part of the surface lamella layer to form a lamella, and a method for producing a woven or knitted cotton having special feathers. Here, the lamellarization of the surface of the woven or knitted cotton material is obtained by lamellarizing the fiber surface constituting the lamella, and the lamella obtained has various widths and lengths of various widths. It has a length.

The width and length of the lamella referred to in the present invention are those measured as follows. That is, an electron micrograph of the surface of a woven or knitted cotton lamella is copied together with a standard scale, and the width and length of the copied lamella are measured with a microscope and the apparent magnification from the magnification of the electron microscope and the standard scale. And ask for the length. The width of the lamella has various widths infinitely means that the width does not have a width that is an integral multiple of a specific width or a width that is a fraction of an integer. And has various widths infinitely. In order to raise the lamella formation, the binding force between the lamellas is reduced by the cellulase enzyme treatment and the subsequent massage with a washer is combined. The peach skin touch is based on sensory evaluation by 10 expert judges.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below. The woven or knitted cotton used in the present invention means 50% by weight of cotton.
In addition to the above, the others are allowed to include mixed spinning or mixed weaving of hemp, rayon, polyester, nylon and the like, but a woven or knitted fabric of 100% cotton is preferable from the viewpoint of the effect of the invention and the utility value.

If necessary, the woven or knitted fabric of the cotton is fried,
Pretreatments such as desizing, refining and bleaching are performed. Further, mercerization treatment with an alkali metal hydroxide solution may be included. After their pretreatment, the cotton woven or knitted fabric is first subjected to cellulase enzyme treatment as a first step.

Examples of the cellulase enzyme used in the first step of the present invention include cellulase A ₃ (commercially available product of Amano Pharmaceutical Co., Aspergillus genus) cellulase T-AP ₄ (commercially available product of Amano Pharmaceutical Co., bacterium Trimaderma genus) Memorase (Meiji Pharmaceutical Co., Ltd. commercial product, Cellular Trimaderma genus) Cellulase XP-4256 (Nagase Sangyo Co., Ltd. commercial product, Cellular Trimaderma genus) Cell Crust (Novo Co., Ltd. commercial product, Cellular Trimaderma genus) Ethylon CM, 10L (Nakuto Kasei Kogyo Co., Ltd. commercial product) Bacterium Trimaderma).

Such cellulase enzymes are usually 1-5
Using 0 g / l aqueous solution with acetic acid, acetate, etc., pH 3-6
The cellulase enzyme-treated solution is preferably adjusted to. or,
It does not interfere with the combined use with cellulase and protease.

Using such a cellulase enzyme treatment solution, in order to keep the tensile retention of a cotton woven or knitted fabric in the range of 30 to 70%, a low-speed washer whose concentration, humidity and time of the cellulase enzyme treatment solution are appropriately selected. The object can be easily achieved by stirring in the air. Rotation speed of the washer at that time: 1 to 10 times, bath ratio 1: 5 to 1:30,
Temperature: Selected from the range of 20 to 60 ° C. After the completion, the temperature is raised to 80 to 90 ° C. to deactivate the enzyme. After the treatment with the cellulase enzyme treatment solution, the cotton woven and knitted fabric is continuously transferred to the rubbing process. The washer rotation number at that time was 10 to 50 times / min, bath ratio 1: 5 to 1:30, temperature:
20-80 degreeC aqueous solution, time: 0.5-24 hr is preferable.

When the cellulase enzyme treatment solution treatment conditions and the above-mentioned rubbing conditions are not satisfied, a desired tensile strength retention cannot be obtained and a desired peach skin touch cannot be obtained.

When rubbing with a washer, the woven or knitted cotton is placed in a net bag. The net bag for bagging is not particularly limited, and a net made of polyester, nylon or hemp can be used.

It is not advisable to simultaneously put the hard rough surface agglomerates as disclosed in JP-A-6-235175 in the net bag. It may be inside or outside the bag, or may not be used at all. This is a characteristic when rubbing the cellulase enzyme-treated solution with water.

The woven and knitted cotton fabric that has been kneaded in the hot water is passed through an ordinary texture finishing machine to reveal the texture. This step is extremely effective in obtaining a peach skin touch texture.

Thus, the present invention causes lamellar formation by the mechanism as described above, and an apparent width: 0.01 to 20 μm, a length: 100 μm or less, and a thickness: 0.01 to 1.6 μm. preferable. It has a characteristic surface as a cotton woven or knitted fabric showing a density of 300 fibers / cm ² or more.
This is the tensile retention rate by cellulase enzyme treatment: 30 to 7
The object can be achieved by combining the first step of keeping the content within 0% and the second step of lamella formation by rubbing with washer.

Next, the mechanism relating to the present invention will be described in detail. The cotton fiber is composed of lamella that concentrically surrounds the central lumen. Therefore, lamellarization is indicated as opposed to fibrillation in polynosic fibers. In order to impart lamellarity to the surface of a woven or knitted cotton fabric, it is necessary to reduce the adhesive force between the lamellae of the monofilament surface. About 30 layers of lamellae are concentrically arranged on one single filament of cotton. The cellulase enzyme effectively acts to reduce the adhesive force between the lamellas. For the purpose of lamella formation, it is sufficient to reduce the adhesive strength between the lamellas on the 1st to 4th layers of the surface, but in the state of underexposure or mercerization, the enzyme may penetrate into the vicinity of the center of the fiber. In many cases, this leads to a considerable reduction in the tensile strength of the monofilaments. At this time, an inverse correlation is established between the tensile strength retention rate and the degree of lamella formation. In this way, the one in which the adhesive force between the lamellas on the fiber surface is reduced is subjected to a rubbing process with a washer. Due to the repeated action of the huge impact shearing force generated here, the lamella on the surface is separated and the lamella is generated.

When a cotton woven or knitted fabric is woven into a washer-rubbing process with a cellulase enzyme solution as described in JP-A-6-235175, no lamella formation occurs at all. This is because the lamella of cotton has a very low enzyme resistance, and even if a lamella is produced, it is disassembled by an enzyme and disappears successively.

On the other hand, in the case of regenerated cellulosic fibers, the produced fibrils have a sufficiently high enzyme resistance and are hardly destroyed by the enzyme, so that the produced fibrils remain and a peach skin touch is obtained. For this reason, in the case of a cotton woven or knitted fabric, a peach skin touch can be obtained by separating it into a first step of enzyme solution treatment for reducing the bonding force between lamellas and a second step of rubbing for lamella formation. Succeeded for the first time. First of enzyme solution processing
The process can be applied by any method capable of low speed stirring.

The fundamental difference between cotton and regenerated cellulosic fibers as described above is that the latter is formed by highly aligned and dense fibrils due to uniaxial extension, whereas the former is formed by layering of cellulose molecules. It is caused by being formed from a lamella having a sparse tissue formed.

[0022]

The present invention will be described in more detail with reference to the following examples, but it goes without saying that the present invention is not limited to these examples.

Example 1 Wool knitting, desizing, refining, and bleaching of 100/2% cotton woven 80/2 × 80 / s / 133 × 74 were carried out by commonly known methods.
The vertical tensile strength at that time was 50.71 kg / inch. Entilon CM-40 as cellulase enzyme
L to 20 g / l solution to give a pH of 4.7, washer:
After treating for 20 minutes under the conditions of 10 rpm, 60 ° C. and liquid ratio: 1/20, the mixture was deactivated at 80 ° C. for 0.5 hr, washed with water and dried. The vertical tensile strength at that time was 22.2 kg / inch, and the tensile strength retention ratio was 43.0%. This is 6
Water at 0 ° C, liquid ratio: 1/20, washer 3 at 30 rpm
When processed for a time, the apparent width of the generated lamella is 10μ
Hereinafter, a length of 50 μm or less and a density of 400 lines / cm ² were measured, and it was determined that the peach skin touch was also good.

COMPARATIVE EXAMPLE 1 The same procedure as in Example 1 was carried out except that the solution of Entilon CM-40L was changed to 1 g / l instead of hot water at 60 ° C., and no lamella was observed at all. As a matter of course, the peach skin touch texture did not appear.

Comparative Example 2 In Example 1, entyrone C was used as a cellulase enzyme.
When M-40L was changed to 5 g / l, the tensile strength retention was 81.2%, the lamella after the lamella formation process was small, and the peach skin touch texture was also unsatisfactory.

Comparative Example 3 Entilon CM was used as the cellulase enzyme in Example 1.
When the -40L treatment was extended to 60 minutes, the vertical tensile strength retention rate was 20% and the peach skin touch after the lamella formation process was excellent, but the vertical tensile strength was 5.2 g / inch, which was too low for practical use. It became impossible.

[0027]

As described above in detail, the present invention provides a woven or knitted cotton fabric with an apparent width of 0.01 to 20 μm, a length of 100 μm or less, and a density of 300 fibers / cm ² or more. It is possible to give a peach skin touch that cannot be given at all by the conventional emery paper method and the napped cloth raising method, and it is possible to obtain a cotton woven or knitted fabric excellent in the peach skin touch which has been conventionally regarded as difficult. It should be noted that the present invention can reproduce the same for knit products as well as woven and knit products.

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Claims (2)

(57) [Claims] 1. A woven or knitted fabric of cotton having a lamella formed by peeling off a part of a lamella layer of a cotton fiber surface layer which has been exposed under the surface or mercerized, and the lamella has an apparent width of 0.01 to 20 μm Within the range, having various apparent widths within the range and having a length of 100 μ or less, and the density of lamellae present on the surface of the woven or knitted fabric is 300 strands / cm ² or more. A woven or knitted cotton having special feathers characterized by the above. 2. A first step in which a tensile strength retention rate is reduced to a range of 30 to 70% by treating a woven or knitted cotton woven or bleached under finish with a cellulase enzyme and a subsequent rubbing action of cotton fibers A second step of peeling a part of the surface lamella layer to form a lamella, and a method for manufacturing a woven or knitted cotton having special feathers.