JPS5953399B2 - Manufacturing method of perforated fabric - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for manufacturing a perforated fabric.

More specifically, the present invention relates to a perforated fabric formed by partially printing or applying a fiber dissolving agent and heat-treating the same, and a method for producing the same.

Originally, a method called "punching" is commonly used to make holes that penetrate to the back side of fiber fabrics, nonwoven fabrics, sheets, paper, leather, etc.

Other methods other than punching include melt forming, weaving,
There is a method of forming it by the pattern structure during knitting, or a method of dissolving it.

The punching method for textile products has a problem in that the cutting blade has poor sharpness, making it extremely difficult to punch holes, especially in soft fabrics such as thin synthetic fiber fabrics and knitted fabrics.

Therefore, a method is used in which a hard finish is applied in advance by resin treatment, gluing, backing, etc., and then punching is performed.

Furthermore, products with holes made by the current punching method have defects such as fraying and cracking around the cut holes, so it is necessary to take measures such as bonding the holes with a resin finish or the like.

From an equipment point of view, many original plates and force meters are required depending on the type of punching pattern, resulting in huge costs and long production times, which is very economically disadvantageous in small-lot production.

On the other hand, it is also possible to print a fiber-dissolving agent and create pores in the printed area, but this method is particularly useful for dyed products, as the entire surface of the fabric may be discolored or discolored due to bleeding or halation of the dissolving agent to the non-opened areas. It was difficult to produce products with commercial value due to the embrittlement.

In view of these current circumstances, the present inventors conducted extensive research to improve this problem, and as a result, devised a method for producing a perforated fabric that is less prone to discoloration and strength embrittlement and has improved fraying resistance.

In order to achieve the above object, the present invention has the following configuration.

(1) When printing a printing agent containing sulfuric acid on a knitted fabric made of synthetic fibers selected from polyester fibers, polyamide fibers, or polyacrylic fibers and opening holes in the printed area, A method for producing a perforated fabric, characterized by subjecting at least the peripheral portion to an alkali pretreatment.

(2) The method for producing a perforated fabric according to claim 1, wherein the printing agent contains a ring agent and/or an organic acid.

Next, a method for producing a perforated fabric according to the present invention will be explained.

The fiber dissolving agent applicable to the present invention may be any agent as long as it can be mixed into the viscosity agent and maintains a viscosity that allows printing or coating.

Therefore, it is appropriate to use a viscous agent that is resistant to these chemicals, and preferably one that can be removed in the subsequent washing step.

The fiber dissolving agent varies depending on the type of fiber to be used, and it is necessary to select and use the most effective one.

For example, polyester fibers, polyamide fibers or polyacrylic fibers can be used, and sulfuric acid can be used as a solvent for these fibers.

As a pre-treatment agent, for example, if a black fabric dyed with a disperse dye is treated with an aqueous sodium carbonate solution, bleeding can be completely prevented and discoloration can be prevented by applying a strong acidic and viscous substance followed by heat treatment. .

Furthermore, when the concentration of sodium carbonate used changes, the state of the pores changes and the shape of the pore walls changes.

In addition, the present invention has a feature of improving the fraying property by significantly reducing the elastic repulsive force inherent in the fibers by applying a chemical to the tips of the fibers in the openings, thereby preventing the fibers from dispersing or separating during elongation and bending.

In particular, in the method of the present invention, when an organic acid, a reducing agent, or both are used in combination with the fiber dissolving agent, not only the pore properties are improved, but also the fiber ends at the pores become plasticized, making them more difficult to fray. .

As the reducing agent used in combination here, a reducing discharge printing agent is effective, and as the organic acid, mainly nonvolatile organic acids such as malic acid, citric acid, tartaric acid, etc. are preferable, but other acids such as formic acid and acetic acid may also be used together. Brings good effects.

Furthermore, the addition of a black substance, for example activated carbon such as carbon black, or a heat radiation aid such as a black dye, is also advantageous in improving penetration.

However, the increase in viscosity caused by the addition of large amounts of these compounds has the opposite effect.

Other auxiliaries commonly used in the composition, such as penetrants,
It is also possible to mix wetting agents, workability improving agents, carriers, coloring agents, etc.

Furthermore, by changing the dye used for background dyeing, the present inventors can vary the coloring hue around the aperture, making the outlines of the non-aperture and the area around the aperture different hues in a so-called glasses shape. It is possible.

In particular, the different color effect gives remarkable results in strong acid/disperse dye systems, and its effectiveness can only be demonstrated by pre-alkali pretreatment.

The fabric may be pretreated by any method such as a padding method, a submerged treatment method, or a coating method.

This pretreatment has extremely effective effects on preventing discoloration, achieving a different color effect, and configuring the shape of the aperture walls, making it possible to stabilize the quality and adjust the shape of the apertures.

The printing composition prepared as described above is printed on a fabric by screen printing, roller printing, gravure printing, or the like.

After printing, it is dried according to a conventional method, and then heat treatment is performed to embrittle, melt, or carbonize the printed area.

After the heat treatment, if necessary, a process having a brushing or kneading effect is performed to remove the brittle parts and a cleaning finish is performed.

Heat treatment includes dry heat treatment, saturated steam treatment, superheated steam treatment (H
T-steamer) or a combination method of these is effective.

In particular, steaming treatment or HT steamer treatment after dry heat treatment improves the ability of the embrittled portion to fall off, making it possible to reduce black discoloration of the carbonized portion.

In addition, if the hole is opened in the state of white cloth, then it is dyed and finished according to a conventional method.

When the method of the present invention is applied to dyed products, only the walls of the apertures are bleached or discolored.
The following clear edges are created, which strengthens the contrast between the open and non-open areas, resulting in a unique design.

Of course, in the elution hole method without pretreatment, the discoloration area is disturbed due to bleeding of the dissolving agent, and a perforated fabric with commercial value cannot be obtained.

It goes without saying that if it is desired to obtain a dyed fabric with different color tones without edges, dyeing may be carried out after elution opening.

Next, the method of the present invention will be specifically explained with reference to Examples.

Of course, the present invention is not limited to these examples.

Example 1 Dyed product of single-sided brushed horizontal knit thin fabric made of 100% polyester fiber (front: Tetron 50 denier, 48 filament manufactured by Toshi Co., Ltd., back: Tetron 30 denier 12 filament manufactured by Toshi Co., Ltd.) (disperse dye black dyed product) and padded with 1% sodium carbonate aqueous solution as alkali pretreatment. 1 dip, 1 nip, 2.5℃ bath, squeezing pressure 2.0kg/Cr112) 12
It was dried at 0°C for 4 minutes.

The following composition was printed on this raised surface using a rotary screen to obtain a printed fabric with a polka dot pattern.

After drying the printed material (120℃ x 4 minutes),
Heat treated in a baking machine at 0°C for 10 minutes, followed by H
It was treated with a T steamer at 170°C for 8 minutes.

After that, sodium carbonate 2biha, sanded) (, -29
(Manufactured by Sanyo Chemical Co., Ltd.) 80℃ x 20 minutes in a cleaning bath containing IgHa
Perform the processing for a few minutes and finish.

The finished product has small polka dots perforated all over the other parts, and the flower pattern has a design with perforated polka dots on the core and thread line, and non-perforated parts on the other parts, which is an innovative design that is completely impossible with conventional punching methods. The new product was well received.

In particular, against the black background color, the aperture wall and its outline of about 0.25 mm exhibited a yellow-green ring-shaped hue, and the different color effect was clear.

Most of the single fibers in the aperture walls were tapered due to the dissolution action, and the cross section of the aperture formed a wasp-like shape.

For comparison, the fabric that was not pretreated with alkali had a marked yellowish brown color on the entire surface and had no commercial value.

In addition, the strength of the non-porous portion was significantly weakened.

Example 2 Polyester brushed nine-knit fabric (front: manufactured by Toshi Co., Ltd.
Tetron 30 denier 24 filament, back:
Tetron (30 denier, 12 filaments) manufactured by Toshi Co., Ltd. was ground-dyed with the following dye.

CI, //6. Despers Blue 106
13.0% CI, A Despere Red Feather
0.3% CI, A Despers Orange 31
After 60 minutes at 3.5% at 120°C, the sample was pretreated with alkali according to Example 1 and printed using an autoscreen.

After that, finish by heat-treating at 180°C for 15 minutes.

The finished product was a perforated product with a unique color in which the outline of the perforated part was red, contrasting with the black background color.

It was confirmed that different coloring effects can be obtained by changing the dye used for background dyeing.

Also, under alkaline pretreatment conditions, i.e., when the amount of sodium carbonate used is increased, does the red color of the ring become smaller? It was found that the smaller the amount, the larger the size.

Furthermore, it was observed that the shape of the opening became longer as the amount of use increased, the tapered part of the slit became longer, and as the amount of use increased, the shape became closer to a vertical shape.

On the other hand, as a result of examining the effects of reducing agents and organic acids, we found that those with these added had very good penetration during opening, resulting in plasticity of the fiber ends on the opening wall, suppressing hole formation, and causing tissue collapse. I was reluctant.

Example 3 Dyed fabric of Toshi Co., Ltd.'s Nisneed “Exaine” (
(dark brown) was immersed in a 0.7% sodium carbonate aqueous solution and dehydrated and dried.

Next, sulfuric acid (98%) 18%, malic acid 4%, PEG-4
003%, Sootous Chloride 8%, Maypro Gum NP (1
18 by screen printing a viscous agent consisting of 5%) and 60%.
It was heat-treated at 0°C for 12 minutes and then treated with saturated steam at 120°C for 15 minutes to finish cleaning.

When the fabric was printed from the back side, the perforation of the perforations was better.

The finished product fully exhibited the effects of the present invention as a perforated product.

Example 4 A 50-denier nylon fabric was dyed a dark red with an acid dye.

The print was dried in the same manner as in Example 1, heat treated for 3 minutes in a baking machine at 150°C, and then washed and finished.

The finished product had good polka dot openings.

In the conventional punching method, the fabric is very flexible, which causes the fabric to slip, making it difficult to make holes without hard finishing, but the method of the present invention has no such problems.

Example 5 Front: Nylon 50 denier, 40 filament,
Back: Cationic dyeable °° Tetron “30 denier 6
A raised knitted fabric (brown) made of filament (all manufactured by Toshi Co., Ltd.) was printed and finished in accordance with Example 4.

However, in the printing composition, Astrazon Red 6B (B
(manufactured by Y Company) was added at 5%.

The finished product had a polka dot pattern with only the nylon dissolved and the ``Tetron'' on the back remaining, and the ``Tetron'' was colored red.

Therefore, we obtained a product with very deep irregularities of four parts, in which the bottom of the open part was red and the non-porous part of the nylon was brown, and it attracted attention.

Example 6 The polyester raised nine-knit fabric of Example 2 was dyed pink, dried, padded with a 0.5% IJum aqueous solution, and set at 170°C.

The effect of the reducing agent was examined according to the treatment in Example 1.

As reducing agents, stannous chloride and dechlorin (manufactured by BASF) were added in an amount of 10% each.

With no reducing agent added, sharp pores could not be obtained unless a considerable fir effect was applied in the cleaning process after the pore opening process, but with stannous chloride and dechlorin added, carbonization was easily achieved during the cleaning process. The effectiveness of adding a reducing agent was confirmed.

Example 7 A georgette cloth made of 100% polyester fiber (both vertically and horizontally "Tetron" 50D-24F: manufactured by Toshi Co., Ltd.) that had been scoured and set was padded with an aqueous solution of 20 g of sodium carbonate and dried. .

Next, a polka dot pattern was printed on this white fabric using an autoscreen printing machine using the following composition.

The following units (parts) indicate parts by weight. Indal Riki 226 (manufactured by Chugai Boeki Co., Ltd.: solid content 20% by weight) 18 parts Tancil Gum A (manufactured by Dainippon Pharmaceutical Co., Ltd.: solid content 15% by weight) 41 parts H2SO
418 parts malic acid 4 parts 1st chloride
Tin 3 parts glycerin
1 part water
15 parts total
The fabric printed with 100 parts of the above composition was heated at 140°C.
The film was dried with a pin tenter, and then treated with a pin tenter at 180°C for 50 seconds, which was repeated twice.

However, during the second treatment, steam was blown from one side of the fabric to absorb moisture, and the above heat treatment was performed.

After the treatment, the printed portion of the fabric was carbonized and turned into powder to the extent that it could be removed just by being lightly kneaded.

The fabric in this state was washed and finished according to Example 1.

The finished product was a Tetron Georgette blouse with a very elegant perforated pattern.

Claims (1)

[Claims] 1. Polyester fiber 1. When printing a printing agent containing sulfuric acid on a knitted fabric made of synthetic fibers selected from polyamide fibers or polyacrylic fibers and opening holes in the printed area, an alkali solution is applied to at least the peripheral area of the printed area. A method for producing a perforated fabric, which is characterized by subjecting it to a treatment. 2. The method for producing a perforated fabric according to claim 1, wherein the printing agent contains a reducing agent and/or an organic acid.