JP3176529B2 - Injection molded shoe jacket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection-molded shoe which can be integrally molded with a shoe sole without a bonding treatment having good air permeability, high sustained water repellency and stain resistance. It is about the shell.

[0002]

2. Description of the Related Art Injection-molded shoes made of cotton fabric and treated with a fluorine-based water repellent have been put on the market.

[0003]

Injection-molded shoes made by treating a cotton fabric with a fluorine-based water repellent to form a shoe cap have been repeatedly washed, resulting in reduced water repellency and antifouling properties, and are considered practical. And the durability was not enough.

[0004] A shoe upper obtained by treating a cotton fabric with a fluorine-based water repellent has poor water wetting due to the water repellency and oil repellency of the outer cloth. Unfortunately, it was necessary to apply an adhesive to the cap, and to use a specially-blended thermoplastic resin for the bottom material as described in JP-A-6-62907.

In general, when used as a fabric cap,
It can not be used alone with woven fabric, it is usually used by laminating from shoemaking, there is a limit to giving breathability,
It was not possible to completely eliminate foot stuffiness.

[0006]

According to the present invention, the surface is treated with a fluorine-based water repellent, and the pore volume ratio measured according to JIS L1096 General Textile Test Methods 6 and 10 is 50 to 9%.
The first feature is a shoe shell covering made of a mesh knitted fabric in which a mesh-like structure and a ground structure are connected to each other with a connecting yarn so as to be 7%. A second feature is that one side of the mesh structure of the shell material has 2 to 60 courses. or,
A third feature is that the mesh structure and the ground structure of the shell material are synthetic fibers. A fourth feature is that the shell material is used for an injection molded shoe shell.

[0007] In practicing the present invention, if one side of the mesh structure is less than 2 courses, it is not worth as a mesh, and if it exceeds 60 courses, the size of the mesh becomes excessively large, and the mesh is not stable and has no shape stability. Low practical value. The connecting yarn for connecting the mesh structure and the ground structure preferably has a fineness of 100 denier or more. If the denier is less than 100 denier, there is no waist as a shoe cap and shape stability is poor.

[0008] The pore volume ratio of the mesh knitted fabric is 50 to 9
It is necessary to be 7%, and if the pore volume ratio is less than 50%, the thread-like density is high, it is difficult to form a mesh shape, and it is disadvantageous to make the shell have air permeability,
Also, when integrally molded with the sole material, the anchoring effect is hindered,
It is also difficult to obtain strong adhesion between the shell and the bottom material.

On the other hand, if the pore volume ratio exceeds 97%, the density of the filaments is too low, the shape stability is poor, and it is difficult to hold a three-dimensional mesh. It is important to treat a sheath with a mesh structure and a ground structure, which is a synthetic fiber of polyamide, polyester, acrylic, etc., with a fluorine-based water repellent in order to provide highly persistent water repellency and stain resistance. is there.

Examples of the fluorine-based water repellent include dispersions of polytetrafluoroethylene, tetrafluoroethylene / hexafluoropropylene copolymer, polyvinyl fluoride, vinylidene fluoride, chlorotrifluoroethylene / vinylidene fluoride copolymer and the like. Emulsions and the like are used, and diamide-based compounds, melamine-based compounds, and isocyanate-based compounds are used as the cross-linking agent, and melamine-based compounds with little discoloration are used most frequently.

Synthetic fibers have excellent antifouling properties, such as less hygroscopicity and less entanglement of the fibers themselves, as compared to cotton materials, so that dirt is less likely to adhere and dirt is more likely to be removed during washing. . By treating this synthetic fiber having excellent antifouling properties with the above-mentioned fluorine-based compound, a molecule is formed around the fiber in a shield-like protective film, thereby imparting highly persistent water repellency and antifouling property. be able to.

[0012]

As described above, the injection-molded shoe cap of the present invention connects the mesh structure and the ground structure each having 2 to 60 courses with the connecting yarn, and has a pore volume ratio defined by JIS L1096 of 50. -97%, and the raw material is a mesh knitted fabric made of synthetic fibers such as polyamide, polyester, acrylic, etc., treated with a fluorine-based water repellent.
Injection-molded shoes with this as a cover have a strong adhesion to the shoe sole due to the anchoring effect, good shape retention, good ventilation, no stuffiness, hard to get dirty, easy to wash Numerous effects such as easy falling and quick drying can be provided to the wearer.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view schematically showing an outline of a shoe shell material of the present invention. FIG. 2 is a schematic perspective view of an injection molded shoe using the shoe shell material of FIG.

As shown in FIG. 1, the mesh knitted fabric has a structure in which a mesh structure 1a and a ground structure 1b are connected by a connecting yarn 1c. The mesh structure 1a is made of polyester multifilament yarn of 400 denier / 96 filaments, and each side has 5 courses.
The mesh knitted fabric 1 was knitted by a double Russell knitting machine using a denier / 96 filament polyester multifilament yarn and a 220 denier polyester filament yarn as the connecting yarn 1c.

[0015] The mesh knitted fabric was dyed at 100 ° C, dried, and set at 150 ° C for 30 seconds. The pore volume ratio at this time was calculated by (1−W / 1,000 × t × s) × 100, the basis weight W: 360 g / m ² , the fiber density s: 1.27
g / cm ³ and thickness t: 90.5% at 3 mm.

The above-mentioned mesh knitted fabric is coated with 4 parts by weight of an emulsion of polytetrafluoroethylene (manufactured by DuPont, Teflon (registered trademark)), 0.2 parts by weight of a melamine crosslinking agent, and 100 parts by weight of fluorine containing water. Dipped in a water-repellent agent, passed between rubber rolls and squeezed 120-140
And dried with hot air at a temperature of 170-190 ° C.
The mixture was cured for minutes, washed with water to remove the unreacted crosslinking agent, and dried.

The mesh knitted fabric thus treated for water repellency and stainproofing is cut, sewn, and sewn to an insole to obtain a bag-like shell commonly called California shell. This cap was hung in a last mold and combined with a side mold and a bottom mold to form a cavity for forming a shoe sole. 100 parts by weight of polyvinyl chloride, 90 parts by weight of a plasticizer (dioctyl phthalate), mercapto Sn
A base material compound for injection molding consisting of 2.5 parts by weight of a system stabilizer, 10 parts by weight of a filler (CaCO ₃ ), and 5 parts by weight of a pigment (titanium white) is injected by an injection molding machine at an injection temperature of 190 ° C. At the same time as the sole was formed, the shoe sole was attached to a shell, and after cooling, a shoe product was obtained.

The shoe product manufactured in this manner had a well-fitted shell in the last mold and a good finish as a shoe. In addition, a 10 mm wide sample was taken from the bonded part between the upper cover and the sole of the shoe, and a peeling test was performed using a shopper type tensile tester under the conditions of an opening angle of 180 ° C. at the time of tension and a speed of 50 mm / min. The strength is 3.8kg / cm,
There was no problem as a shoe at all. In addition, the shoes were washed with a commercially available detergent in a washing machine, drained after washing, dried in a dryer set at 60 ° C., completely dried in 30 minutes, and had good drying properties after washing. there were.

The steps of washing and drying the shoe cap constituting the shoe using a commercially available detergent in a washing machine were repeated 10 times, and the water repellency and oil repellency were measured. The following results were obtained. For comparison, the tissue was (10/2 × 10/2) / (45 × 3
The same washing test as above was carried out on the raw fabric obtained by treating the plain cotton woven fabric of 4) with the same fluorine-based water repellent and then bonding the same, and the results of measuring the water repellency and oil repellency are also shown below.

Water repellency ^{* 1} Oil repellency ^{* 2} Before washing After washing 10 times After washing Before washing 10 times After laundering of the present invention 100 100 5th grade 5th comparative example (cotton plain woven fabric) 100 70 5th grade 4th * 1 : Based on JIS L1092 spray method water repellency test method * 2: AATCC method 118 oil repellency test method

[0021]

When the shoe of the present invention is formed integrally with the shoe sole material by the injection molding method to form a shoe, the adhesiveness between the shoe jacket and the shoe sole is good.
The shoes were free from stuffiness when worn, did not easily adhere to dirt, easily removed when repeatedly washed, and dried quickly.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an outline of a shoe shell material according to the present invention.

FIG. 2 is a schematic perspective view of an injection-molded shoe using the shoe shell material of FIG.

[Explanation of symbols]

 1 mesh knitted fabric 1a mesh structure 1b ground structure 1c connecting thread 2 shoe sole

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A43B 1/00-23/30 B29D 31/50

Claims (4)

(57) [Claims] 1. A mesh-like structure and a ground structure having a surface treated with a fluorine-based water repellent so that a pore volume ratio measured by JIS L1096 General Textile Test Methods 6 and 10 is 50 to 97%. Is a mesh knitted fabric that is connected with connecting yarns. 2. The shoe covering material according to claim 1, wherein one side of the mesh structure has 2 to 60 courses. 3. The shoe jacket according to claim 1, wherein the mesh structure and the ground structure are synthetic fibers. 4. The shoe shell material according to claim 1, wherein the shoe shell material is used for an injection molded shoe shell.