JPS602426B2 - Method of manufacturing suede-like fabric - Google Patents

Description

Detailed Description of the Invention The present invention has a soft texture, a slimy touch,
Natural suede "Also, it relates to a method for manufacturing a suede Chofu obi that has an elegant luster like natural velour, and a small area with random hair direction.

In recent years, the demand for natural leather has increased, and many techniques for artificially manufacturing natural leather Chofufu have been proposed.

It is also known that in order to manufacture an excellent natural Tsujishibagusa Chofu curtain, the thickness of the fibers that make it up is an important factor, and it is preferable to use ultrafine fibers with a fineness of 1 denier or less.

However, the manufacturing and handling of ultrafine fibers
Compared to conventional fibers, it is difficult to make sheet-like products such as knitted fabrics and non-woven fabrics, and various proposals have been made not only regarding manufacturing techniques but also regarding this point.

The present applicant has also previously proposed various manufacturing methods that have excellent processability and are extremely advantageous industrially. As an example, ultrafine fibers are directly made into tow-like paper threads, cut into short fibers of 8 ribs or less, and then dispersed in water and made into paper sheets to obtain a sheet made of ultrafine short fibers.

Next, there is a method in which the sheet is stacked on a substrate having a large number of voids, and a strong jet fluid is applied to the surface of the sheet to obtain a composite sheet-like product in which the substrate and the ultrafine fibers are intertwined and integrated.

However, the composite sheet-like product obtained by cross-crossing ultra-fine fibers obtained in this way is not based on ultra-fine fibers (although it has excellent gloss and touch, the surface after cross-cross treatment As it was, it could not be said to be sufficient as a product because there were few fibers that were crossed and raised, and there were traces of intertwining treatment.

The purpose of the present invention is to remove treatment marks on the entangled surface of a composite sheet made of ultrafine fibers, and to create a suede that has the unique texture and appearance of ultrafine fibers by nuffling the ultrafine fibers on both sides of the sheet.
The purpose of the invention is to provide a method for manufacturing dechofu tail, and the gist of the invention is that ultrafine fibers with a weave of 1 denier or less and a fiber length of 8 ribs or less and a heat-shrinkable base fabric are three-dimensionally formed by the action of a jetting fluid. While moving the composite sheet-like material formed by intersecting and integrating in a liquid, a fluid at a pressure 0.3 to 40 k9' higher than the pressure of the fluid is injected from a high-pressure fluid injection port provided in the liquid. ``This is a common manufacturing method of Suede Chofu, which is characterized by fluffing the surface of the composite sheet by spraying the composite sheet.

Hereinafter, the structure of the present invention will be explained in detail. First, the properties of the object to be processed are as follows: weave is 1 denier or less and fiber length is 8 or less, preferably fineness is 0.5 denier or less and fiber length is 5 or less. It is a composite sheet-like product formed by three-dimensionally intertwining and integrating one or more types of ultrafine staple fibers with a base fabric.

If the weave exceeds 1 denier, the suede-like texture and appearance that is the object of the present invention cannot be obtained, so the weave is preferably as thin as possible.

On the other hand, if the fiber length exceeds 8 sides, the length of the pile obtained by removing the entanglement and raising the pile will be too long, and the appearance will be extremely deteriorated.

On the other hand, if the fiber length is too short, the shedding due to the treatment of the present invention will be too large, and the interlacing treatment itself will be difficult, so the lower limit is preferably about 0.5 fibers. There are no particular limitations on the materials, including fibrillated leather, split or partially melted silk, wool, etc., ultra-fine fibers that have been artificially graded, or those obtained by splitting or melting. The base fabric may be any material such as ultrafine fibers. Also, two or more of these may be mixed. On the other hand, the base fabric may be any material such as nonwoven fabric, knitted fabric, woven fabric, porous sheet, etc. Any material having a diameter of 4 mm and a large number of voids may be used.

Regarding the properties of the voids, they are holes with a diameter of 0.01 to 20 ribs, preferably 0.2 to 0.8 ribs, and the entire surface or part of the sheet is filled with these voids, and preferably most of these voids are filled with the sheet. It is better to have one that penetrates to the back side rather than the front side. Further, this base fabric is preferably heat-shrinkable in order to further strengthen the three-dimensional entanglement with the ultrafine fibers.

The means for three-dimensionally intertwining these ultrafine fibers and the base fabric usually uses a jetting fluid.

That is, a sheet-like material of ultrafine short fibers is obtained by dispersing ultrafine short fibers in a liquid and forming them onto a suitable support, or by dispersing them in a gas and then aggregating them on a support. A preferred method is to overlap the ultrafine short fiber sheet produced in the above manner with a base fabric, and apply a columnar jet fluid formed on the surface of the sheet made of ultrafine short fibers to intersect with each other. More preferably, the ultrafine short fiber sheet is again superimposed on the side where the ultrafine short fiber sheet was first overlapped and intersected, or on the opposite side thereof, and the columnar jet fluid is again applied from the sheet side to intertwine the sheets.

Alternatively, it may be more effective to repeat this operation several more times. Further, it is preferable that the composite sheet material is subjected to hot water shrinkage treatment in order to further strengthen the intertwining of the ultrafine fibers and the base fabric.

Next, while moving the composite sheet-like material obtained in this way through the liquid, a liquid having a pressure of 0.3 to 40 k9/cm is applied from the high-pressure fluid injection port provided in the liquid. It is treated by spraying it onto a composite sheet-like material.

Water is usually used as the clarification liquid. On the other hand, as a device for processing a composite sheet-like material, a continuous reaper normally used in a color washing factory is preferable.

In addition, dyeing machines such as Zitzker, Wins, etc., and liquid flow dyeing machines such as Nuyace, Loco, Circular KS type, Dashline, etc. can also be used. In any case, it is essential to have a high-pressure fluid injection device, and a portion of the processing machine described above is provided with a high-pressure fluid injection port.

The high pressure fluid injection port has a slit of 0.1 to 1 shipboard,
The slit may be circular with a diameter of 50 to 500 ribs so as to enclose the treated cloth, or may be a straight or curved slit.

Alternatively, the nozzle may have an orifice with a diameter of 0.01 to 1 mm and a diameter of 1 to 1000 mm. Further, in order to enhance the effect of these high-pressure fluids, it is preferable to provide a support to prevent the treated cloth from escaping.

A flat plate or a cylindrical roll can be used as the support. These may be non-perforated plates, but preferably perforated plates are used, and the support itself can be moved or rotated so that the sheet-like material can be easily moved.
Further, the number of times of treatment may be just one, but it is usually preferable to treat several groups, and a large number of high-pressure injection ports may be provided, or
Alternatively, it is preferable to process the material while circulating it.

At this time, moving the soaking liquid in the same direction as the processed material is also effective in reducing processing tension and improving the texture.

It is also effective to heat the bonding liquid and shrink the composite sheet at the same time. Usually, depending on the treated fabric,
Process at temperatures below zero.

Further, in order to facilitate the separation of fibers, a surfactant may be added or dyeing may be performed simultaneously with the treatment. In the present invention, in addition to the liquid jetting process, it is also effective to implement two or more of the following steps in combination.

That is, '1' resin application treatment step: polyurethane resin, polyester resin, polyacrylic acid ester resin, polyvinyl acetate resin, silicone resin, melamine resin,
Emulsion of acetal resin, urea resin, etc., or
A treatment process in which a treatment solution is applied by spraying, coating, immersion treatment, etc.

'2} Fleece treatment process: A treatment process in which a part of the criss-crossing is canceled using cloth or sandpaper.

Complimentary dyeing process; The process of dyeing by commonly practiced means.

Preferred examples of these combined steps include a jet entanglement treatment step using a columnar flow → a drying step → a shrinkage treatment step → a liquid-in-liquid jet treatment step of the present invention → a polyurethane resin application step → a napping step → a dyeing step. be. The effects obtained by the treatment of the present invention described above are that both sides are covered with naps of ultra-fine fibers, the direction of the naps is random over a small area, and the unique luster of ultra-fine fibers, vicuña-like luster. It has a soft, slimy touch, and shades based on the directionality of natural suede or velour-like fluff, and the texture is flexible and has excellent drape, giving it an unprecedented natural leather-like feel. It has the ease of handling that synthetic fibers have.

Hereinafter, the structure and effects of the present invention will be explained in more detail by giving examples.

Example 1 A polymer having an intrinsic viscosity of 1.7 (measured in 2yo of dimethylformamide) consisting of 92% by weight of acrylonitrile and 8% by weight of methyl acrylate was dissolved in dimethylacetamide to prepare a 16% by weight stock solution.

Its viscosity was 70 poise. This was filtered using a Pall Filter Rigimesh sheet (a sheet made of stainless steel fibers made by Pall Trinity Micro Co., Ltd.) with a filtering accuracy of 5 μm, and then immersed in a dimethylacetamide 6 wt% aqueous solution. A paper thread with a hole diameter of 30 mm and a number of holes of 40,000 facing upward was threaded at 8/m.
The film was taken up by Jn, and further stretched 4 times in hot K at 80°C and dried. Continue to dry at 170°C. The fangs were stretched and further subjected to relaxation treatment in saturated steam at 120°C. The obtained fiber has a single fiber warp weave of 0.1 denier and a total denier of 0.1 denier.
The tow was 4,000 denier.

Cut this tow into 3 pieces and put it in water to get 0.005
A dispersion liquid having a fiber concentration of % by weight was prepared and sanded with a wire mesh to obtain an ultrafine staple fiber sheet having a basis weight of 30 ta'.
On the other hand, an undrawn yarn made of polyethylene terephthalate polymer at a spinning speed of 2000 M/min was stretched at a draw ratio of 2.2 times between a roll at 80 CO and a roll at room temperature.
A high shrinkage polyester fiber of denier/36 filament was obtained, and this was knitted with a 26 gauge circular knitted fabric to obtain a base fabric.

Next, this base fabric was placed on a 90-mesh wire mesh, and the ultrafine short fiber sheet was further placed on top of this.

Thereafter, a columnar water jet treatment was performed from the ultrafine short fiber sheet side. In the columnar water jet treatment, water was jetted at a pressure of 25 k9/ground using three nozzles with a hole diameter of 0.15 mm and a distance of 1 mm. The distance between the injection hole and the sheet was 4 arcs, and the wire mesh carrying the sheet was moved at a speed of 5 m/min.

The ultrafine short fiber sheet was further placed on the water-jet-treated surface of the composite sheet that had been subjected to such treatment, or on the opposite surface thereof, and the sheet surface was subjected to the same water-jet treatment as before.

The obtained composite sheet had a basis weight of 120 ta'.

Next, this composite sheet was introduced into scale water and the area shrinkage rate was 4.
It was shrunk by 0% to strengthen the intertwining of the ultrafine short fibers and the base fabric.
The obtained composite sheet has ultra-fine short fibers intertwined with each other in a complicated manner, and columnar water jet marks remain in the form of lines on the final water jet treatment surface, so it cannot be said to be sufficient as a product as it is. It was something.

On the other hand, on the back side of the final water-sprayed surface, the ultrafine fibers were separated individually, resulting in a surface with a high fluff density and excellent touch. This composite sheet-like material (30 skins) was dyed using a dyeing machine with a circular slit nozzle having a diameter of 7 mm, at the slit gap, fabric speed, processing temperature, liquid flow pressure difference, and processing time shown in Table 1. After that, it was dyed brown using a cationic disperse dye using a Loco jet dyeing machine.

The obtained composite sheet had a natural suede-like appearance on both the front and back sides, with excellent texture, appearance, gloss, and touch.
On the other hand, it is shown in Table-1. In treatment (2) OU02, which was outside the conditional limit range of the present invention, a cloth tail having a simulated fluff state on both sides could not be obtained. Table - 1 Example 2 An ultrafine short fiber sheet was obtained in the same manner as in Example 1.

On the other hand, high shrinkage polyester fibers of 30 denier/12 filaments and 75 denier/36 filaments were used as warp 3.
0 denier/15 filament warp density 100/inch weft 75 denier/36 filament weft density 5
A base fabric was obtained by weaving 0 pieces/inch of "Shiya".

Next, in the same manner as in Example 1, the ultrafine short fibers and the base fabric were entangled with each other by columnar water jet treatment from one side or both sides to obtain a composite sheet.

Next, this composite sheet was batched 200 times using a high-pressure zipper so that the final columnar water jetting surface was inside.
The treatment was carried out under the conditions shown below.

Here, the installed high-pressure flow jetting device performed the treatment with various slit gaps and jetting pressure differences as shown in Table 2.

The belt installed at the bottom of the composite sheet is made of 90-mesh stainless steel wire gauze and is designed to move in the same direction and at the same speed as the composite sheet.

Further, the distance between the belt and the high-pressure liquid injection port was set to one distance. The treated fabrics within the scope of the present invention shown in Table 2 are:
The linear traces on the columnar liquid jet treated surface have disappeared, and the intricately intertwined ultrafine fibers have separated, resulting in a high fluff density.
A natural suede-like fabric with excellent texture, appearance, gloss, and touch is obtained. On the other hand, in the case of the leg 23 which fell outside the limited range of the treatment according to the present invention, the fluff fell off so much that the base fabric was visible, and conversely, the entanglement of the ultrafine fibers could not be removed.

Therefore, it was not possible to obtain a fabric having excellent fluffiness on both sides. Table-2

Claims (1)

[Claims] 1. While moving in a liquid a composite sheet-like product in which ultrafine fibers with a fineness of 1 denier or less and a fiber length of 8 mm or less and a heat-shrinkable base fabric are three-dimensionally intertwined and integrated by the action of a jetting fluid, A fluid with a pressure 0.3 to 40 kg/cm^2 higher than the pressure of the fluid is injected onto the composite sheet from a high-pressure fluid injection port provided in the composite sheet to fluff the surface of the composite sheet. A method for manufacturing a suede fabric characterized by: