JPS62240075A - Air permeable waterproof shoes and material and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides shoes and materials that are breathable and waterproof;
and its manufacturing method.

(Conventional technology and problems) In recent years, the use of processed parts such as synthetic resin has increased for shoe materials, and resin paint has become the mainstream for natural leather lining materials.
The manufacturing process for shoemaking and sole materials has changed to a shoemaking method in which adhesives that inhibit moisture permeability are used in various places, and the excellent moisture absorption and permeability that leather originally has has been secretly reduced.

On the other hand, consumer orientation toward footwear tends to be soft9.
In addition to the use of footwear, sole materials have also become softer, and batted soles have become preferred, and the traditional ventilation function provided by the collar when walking has been lost. In addition, there is a strong demand in the market for shoes to be water resistant, and shoes made of artificial leather, shoes made of water-repellent natural leather, and shoes made of moisture-permeable film for the second lining have been developed. It is marketed as an all-weather shoe. However, these manufacturing methods significantly reduce the moisture permeability of shoes, further increasing the dissatisfaction of Japanese consumers who are already suffering from a humid climate. There are also breathable shoes such as mesh-knitted shoes and shoes with perforated holes, but these can cause dirt on the feet due to dust from the perforations, rainwater flowing in, etc.
There are restrictions on when and where to wear it, so it is less common.

As a countermeasure against such stuffiness, current efforts are being made to alleviate this by replacing the backing material, the mid-sole material, with a highly moisture-absorbing material. However, there is a limit to the amount of moisture absorbed, and discomfort increases over time, contributing to cold feet in cold regions.

On the other hand, waterproof materials with high moisture permeability that can be used as lining materials have been developed, and there are also high-performance materials that also have breathability, but as mentioned above, the moisture permeability of natural leather used as a cover material decreases. In the current situation, the moisture permeability of the lining material is limited, and the lining material only functions as a waterproof material. In short, the only way to prevent foot stuffiness is to exhaust the humid air caused by sweat inside the shoes.

(Means for Solving the Problem) In the present invention, as a ninth step to solving the above-mentioned problem, as a method of making the jacket have both contradictory functions of water resistance and breathability, two different materials are organically combined, each of which is We devised a method to take advantage of each other's characteristics while also complementing each other's weaknesses. In other words, the outer material has a new breathability function in addition to its appearance and durability, and by layering and integrating a lining material that is both breathable and water resistant on the back side, breathability and waterproofness have been added. The surface materials are synthesized and the joints between the parts are waterproofed by heat-pressure welding using a thermoplastic adhesive material with more water-resistant adhesive strength, without using solvent-based adhesives. It offers a revolutionary all-weather shade that has never existed before.

(Structure of the invention) First, natural leather or synthetic leather (including artificial leather; the same shall apply hereinafter) is used as the surface material, and it has water repellency on the surface and also has a water absorption rate of 10% (1 hour) on the floor surface. ) The following materials,
Or use processed materials. This prevents water from spreading laterally through the floor and making the shoes heavier due to the nine decorative holes and fine ventilation holes when used as breathable and waterproof shoes. It is a lick that can be used locally on the back side of the ventilation section of the surface material.

The ventilation holes should be made in a way that does not reduce the product value of the shoe, and there are two methods: using decorative holes as part of the design, and creating countless microscopic ventilation holes. There are two types of processing: one is carried out during the manufacturing process of the facing material, and the other is processing of ready-made materials.

Made of soft synthetic leather material with a surface finish layer of Q and Q511T.
When using materials of n or less, needle holes on the surface are not noticeable due to fine needle-like processing, but they are easily noticeable in the case of shell materials. Therefore, both natural leather and artificial leather are processed in advance by embossing or shrinking. It is better to drill holes in processed material. Another method is to perform embossing or shrink processing after forming the needle-like ventilation holes.

However, it is most desirable to provide ventilation holes during the rolling process of natural leather or during the manufacturing of synthetic leather flooring, and to create a ventilation finishing layer on the top surface.

Post-processing methods for forming these microholes include attaching needles to a plate-shaped or roller-shaped substrate and drilling the holes while applying pressure or rotating them, or attaching needles in a row horizontally to the needle bar of a sewing machine and drilling the holes. There is a way to do that. The distance between the needles is 2 mm! p 4
mm is appropriate, and the openings from the back of the material do not make the stitches noticeable.

These breathable surface materials do not use waterproof lining materials,
Taking advantage of its breathability, it can also be used for indoor wear, sports chaise, casual chaise, safety shoes, etc.
In addition, the polyurethane direct sole makes the bottom adhesive strong and can be made into a washable chaise that can be washed in a washing machine.

Next, there are 2 inning materials to make the surface material water resistant, but they can be roughly divided into three types: film systems made of porous resin membranes, high-density woven fabrics made of hydrophobic fibers, etc., and nonwoven water-repellent treated materials made of fine fibers. In some cases, reprocessed products of each type are used. Because these materials require contradictory characteristics, such as breathability and water resistance, each material tends to have advantages and disadvantages9 in terms of composition, and it is desirable to use a different one depending on the purpose of the shoe.

As an example of the performance of each material, the following is a method of processing the lining material for the 9° micro-ventilation hole: There is a method of using it on the back side of the surface material, the entire surface, but it is also possible to save material and add hanging material. This can cause water leakage due to elongation, so it is best to apply local waterproofing. For ventilation adhesion, it is integrated with the surface material using a point adhesion method using a resin such as EVA, polyurethane, or polyester. However, if only point bonding is used, there is a risk that rainwater will run horizontally through the gaps between the bonding surfaces. Watertight seal with 6) (hereinafter referred to as waterproof film). Further, as shown in FIG. 1 (b), a thermoplastic film (hereinafter referred to as double-sided adhesive film) (6) that can be bonded on both sides is pasted 9 on the periphery of the adhesive inner surface, and a dot-adhesive lining material (4 ) is also available.

As a physical property test, we tested unperforated natural leather and 2
In comparison with a processed product in which Asahi Kasei's Microwave was bonded at all points to a perforated material with a spacing of rrIrr1, the air permeability of the infinity material was reduced to 0.2 seq/1oocc in the air permeability test (Gurley dog), and the moisture permeability was 1.080 g/lr. ? /day is 3,060
g/i/day, which improved dramatically. In addition, in the bending test, there was no peeling or tearing after 380,000 cycles of FLEXO.
There was no decrease in water pressure. In addition, in the water absorption test of Microwave bonded product of Clarino porous material, it was 11.
1% water absorption, 1 decimal size, (10tyx x I
QcIR) With 1g of water absorption, the weight increase of the shoes is negligible even when worn during rain.

When waterproofing decorative holes (punch holes) and ventilation holes, water pressure and other external pressures are likely to be applied directly to the lining material, so it is necessary to strengthen the adhesive especially around the openings. In this method, a double-sided adhesive film is fused on the back surface of the face material at the planned opening position, punch holes are made, and a lining material is heat fused to the punch holes. In the case of artificial leather, this alone produces enough adhesive strength to break the material in a peel test. However, with water-repellent treated natural leather, the floor material tends to be fluffy and has poor adhesion.If you apply a urethane adhesive to the floor surface in advance and use the processing method described above, strong adhesive strength can be obtained. In addition, when using a non-woven fabric as the lining material, insert a hydrophobic woven fabric in the middle to reinforce the lining material.
A 4-stop piece was made by using tl- and a parent-child hole (parent hole diameter 3 mm) was made in the overlap margin (9) of the wing tip (Fig. 4) 9゛;. A bending test was conducted on five pieces of each of Kanebo's high-density woven Zapina processed products. 500,000 times at YSS (normal temperature), FLE
There were no abnormalities even at XO (room temperature) up to 300,000 times. This test involves two innings of thin, soft bonding on an opening in a location where the surface material is hard and has a thick overlap, and the bending strain is concentrated in the lining material of the opening, which is a severe condition. The durability is thought to be affected by the softening of the material, the sanding process of the overlap, the size of the decorative holes, etc.

(Example) First, an example of processing fine ventilation holes in the ventilation surface material will be described0.
The main material is Clarino soft material (thickness l mm).
Using a material with a surface finish layer of O, Q l mm and a smooth material of natural leather (thickness 1.5 mm), the original fabric was stamped with roller pressure at intervals of 2 mm x 2 mm. The needle-shaped ventilation holes were processed from the back side of the material. When the natural leather was embossed with even smaller irregularities, needle holes were not visible on the surface of both the painting material and only a few needle holes were found on the natural leather when it was pulled strongly.

As an example of shoe processing, a fine ventilation covering material' will be explained. As for the design, the vamp part of the - letter ventilated shoes (
Figure 3) Toshitomo. As the ventilation material, we used Clarino soft material (thickness: 1rffr, water absorption: 10%) with one hole perforated by a microperforated roller, cut it into 7 bump (11) shapes, and bonded the back side with Asahi Kasei's Microwave. The materials were fused together. The head (12), the waist (13), and the band (14) are made of Clarino NS (thickness 1.5 mm, water absorption rate 4%).First, only the outer material is seamed, then the band is sewn, and each seam is sewn. The back of the seam (10) is waterproofed with a 20mm wide waterproof film, the heel is sewn together, and a waterproof film is applied from the inside.Finally, British-made camprel is sewn together at the opening of the shoe as a breathable lining material. It was then covered with ventilation. The bottom was attached using cement, and neoprene adhesive with different concentrations was applied twice to both the cover side and the urethane bottom, so there was no water seepage during the 24-hour water splash test.

Examples of decorative hole ventilated shoes include wing tips (fourth
With the design shown in Figure), ventilation is provided through the decorative hole (8).
Clarino NS (thickness 1.5 mm, water absorption rate 4%) was used as the surface material. First, sew part 1 of the outer material excluding the heel part, paste double-sided adhesive film and lume on the back side of the overlap opening part (16), punch out the parent and child holes, and use Kanebo's high-density woven fabric on the back side. Sabina was heat fused. A waterproof film was pasted on the seamed part, and after the heel was sewn together and the waterproof film was adhered, camprel was sewn as a breathable lining material to make the finished jacket. Since this cover was molded using a simple direct sole method of foamed polyurethane, there was no water leakage even during a 24-hour water splash test.

゛ Although it is easy to prove the functionality of breathable and waterproof shoes as described above in terms of materials, there is a need for a way to convince consumers that the shoes themselves are breathable and waterproof.

Therefore, in order to prove both water resistance and breathability at the same time, the shoes were placed in a water tank and air was forced out from inside the shoes.9. That is, the fifth
As shown in the figure, we installed a shank partition wall (15) using a nyuse keeper (or the last shank section cut material), supplied air with a shed compressor from the shoe opening, and released the air from the ventilation hole. I took it.

This demonstration at the shoe preview event was well received by the guests.

[Brief explanation of drawings]

Figure 1 (a) is a cross-sectional view of the waterproof outer surface of the micro-permeable facing material (b) is a cross-sectional view of the waterproof inner surface. Figure 2 is a waterproof cross-sectional view of the punch hole cover material ◎ Figure 3 is a shoe with ventilation at the bump part. Figure 4 is a shoe with a wingtip hole for ventilation. Figure 5 shows the shoe insertion device used to demonstrate breathability and waterproofing. 1...Water-resistant surface material 2...Minute ventilation treated material 3
... Fine ventilation holes 4 ... Breathable waterproof lining material 5 ... Waterproof film 6 ... Double-sided adhesive film 7 ... Hydrophobic fibers 8 ... Punched ventilation holes 9 ... Overlapping allowance 10 ...・Join seam part 11...Bump ventilation part 12...Head part 13...
・Waist part 14...Band 15...Fashion part partition wall 16...Air supply hose patent applicant Shishirimi + Diagram Co., Ltd.

Claims (1)

[Scope of Claims] 1. A shoe outer material made of natural leather or synthetic leather (including artificial leather; the same shall apply hereinafter), which has countless minute ventilation holes on a part or the entire surface, and has breathable and waterproof material on the back side. Breathable and waterproof shoes characterized by using a cover material having a lining material. 2. Use water-resistant or low water-absorbent natural leather or synthetic leather for the cover material, and partially process ventilation holes or stitch the ventilation material on the back side of the ventilation part. The waterproof lining material is partially vented and bonded, and (a) its outer periphery is waterproof sealed with a thermoplastic adhesive film or a processed material thereof (Figure 1 a), or (b) the inner periphery of the lining material is bonded. The shoe cover according to claim 1, wherein the inner surface is waterproof sealed with a thermoplastic film that can be bonded on both sides (FIG. 1b). 3. Use water-resistant or low water-absorbing natural or synthetic leather for the cover material, and use thermoplastic adhesive that can be bonded on both sides in advance to the back side of decorative holes for design or punched holes for ventilation purposes. Glue the film, apply thermoplastic adhesive, or use a combination of both, drill holes together with the front material, and then add breathable and waterproof lining material to the back of the hole.
A method for manufacturing breathable and waterproof shoe covers that are partially bonded by heat and pressure. 4. As a breathable and waterproof material, processed material of water-resistant porous resin membrane, hydrophobic fiber or water-repellent high-density woven fabric, or water-repellent microwave (fine fiber non-woven fabric)
The breathable and waterproof lining material according to claims 1 to 3, which uses a processed material thereof. 5. Use a material that has been embossed or shrink-processed on the surface of natural leather or synthetic leather, or synthetic leather with a surface finishing layer thickness of 0.05 mm or less, and countless needles that penetrate from the back side. Ventilated shoes using a cover material that is processed with shaped ventilation holes, or the material with minute ventilation holes is embossed or surface-finished so that the openings are not visible at first glance.