JPH05247350A - Polymer composition for boot sole - Google Patents

Abstract

PURPOSE:To obtain a polymer composition capable of providing boot soles having leather-like appearance and touch free from oozing of water into the interior of shoes even in rainy weather. CONSTITUTION:100 pts.wt. natural rubber, diene-based rubber such as styrene butadiene copolymer rubber or plastic such as polyurethane is blended with 10-80 pts.wt. leather powder to give a polymer composition consisting essentially of the blend.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polymer composition for shoe soles, which is capable of producing shoe soles having a leather-like appearance and physical properties.

[0002]

2. Description of the Related Art Leather or polymers are most often used for the outer sole of men's leather shoes. The leather outsole fits comfortably on the foot when wearing shoes, and also has a good texture (feel), while the polymer outsole, for example, the rubber outsole, does not soak into the inside of the shoe even when worn in rainy weather. It can be worn at all times regardless of the weather, and most men's leather shoes use either of the above as the material for the outsole.

[0003]

However, when a leather outer sole is used, rainwater cannot escape from the inside of the shoe when it is raining, and it is unavoidable.
If you use a rubber outsole, there is no luxury appearance,
In addition, there is a defect that it is difficult to fit the foot when wearing shoes and the texture (feel) is bad. The present invention aims to solve all of the above problems.

[0004]

The present invention provides a polymer 10
The gist of the present invention is a polymer composition for shoe soles, which is characterized by comprising 0 parts by weight, 10 to 80 parts by weight of leather powder, and other required polymer compounding agents. Then, 20 to 60 parts by weight is particularly suitable. Here, the polymer is a natural rubber, polyisoprene rubber, styrene / butadiene copolymer rubber, polybutadiene rubber, acrylonitrile / butadiene copolymer rubber, polychloroprene rubber or other diene rubber, or polyurethane, polyvinyl chloride, ethylene / vinyl acetate copolymer. Polymer, ethylene
A propylene / diene copolymer or the like is used. If the amount of the leather powder is less than 10 parts by weight based on 100 parts by weight of the polymer, the appearance will not be the same as that of leather, and it will not be familiar to the foot when wearing shoes, and the texture (feel) will be reduced. ) Is bad, and if it exceeds 80 parts by weight, the physical properties are deteriorated and the durability is lost.

[0005]

When the polymer composition for shoe sole of the present invention is press-vulcanized to be molded into the shoe sole or the like, the leather is present in the polymer in a matrix form on the surface of the shoe sole. The appearance and the familiarity (feel) to the feet can be exhibited. In addition, since the polymer always exists around each leather powder, water does not soak into the shoe even when it is immersed in rain water during wearing.

[0006]

[Examples] No.1 No.2 No.3 No.4 No.5 No.6 No.7 Cowhide − − − − − 100 − Polychloroprene 100 100 100 − − − 100 Natural rubber − − − 70 − − − Polybutadiene rubber − − − 30 − − − Polyurethane ^{* 1} − − − − 100 − − Leather powder ^{* 2} 10 40 80 40 40 − − Stearic acid 0.5 0.5 0.5 1 − − 0.5 Zinc white 4 4 4 5 − − 4 Magnesia 5 5 5 − − − 5 Anti-aging agent ^{* 3} − − − 0.8 − − − Wax − − − − 0.5 − − − Coumaron resin − − − 3 − − − White carbon − − − 37.5 − − − Polyethylene glycol − − − 3 − − − Spindle oil − − − 3 − − − Vulcanization accelerator M − − − 0.2 − − − Vulcanization accelerator DM − − − 1.6 − − − Vulcanization accelerator TS − − − 0.13 − − − Sulfur − − − 2 − − − Tensile strength ^{* 4} 180 110 160 105 95 −213 Elongation ^{* 4} 850 400 320 420 380 − 860 300% stress ^{* 4} 25 35 102 430 97-20 Hardness ^{* 4} 57 85 91 82 85-48 Water absorption ^{* 5} Volume increase rate 3.2 4.1 5.1 4.3 4.7 9.8 3.0 Volume increase rate 3.7 4.6 4.9 4.8 4.8 11.2 3.5 Feel ^{* 6} ○ ○ ○ ○ ○ ○ × Water stain ^{* 7} ○ ○ ○ ○ ○ × ○ * 1: Butylene adipate polyester polyol manufactured by Dainippon Ink and Chemicals Co., Ltd., and polyurethane containing 1.4 butanediol and methylene diisocyanate as main components were used. * 2: Anglen K100 from Daicel Huls Ltd.
P was used. * 3: Wing Stay L manufactured by Goodyear C0 was used. * 4: According to JIS K6301 vulcanized rubber physical test method. * 5: Immersed in water at 40 ° C. for 22 hours and sufficiently wiped for measurement. * 6: The outer sole of the shoe is formed by the press vulcanization method, and the shoe is attached to the underside of the instep and worn for 3 hours a day. The feel on the foot and the leather-like appearance are examined. ○, and vice versa are indicated by ×. * 7: The same shoes as * 6 were worn in rainy weather, and the water stains inside the shoes were examined. Those that did not soak into the shoes were indicated by ◯, and those soaked in were indicated by x.

No. 1, No. 2,
No.3, No.4, and No.7 were kneaded with a roll machine, aged at room temperature for one day, rolled into a predetermined thickness, and after cutting, the outer bottom was obtained by a press vulcanization method according to a conventional method. No. 5 was obtained by the casting method and No. 6 was cut into the shape of the outer bottom to obtain the outer bottom. The same test piece as the outer sole thus obtained was prepared, and each physical test was performed. The results are shown below the formulation table. According to such an example, the intended purpose of the present invention could be achieved.

[0008]

[Effect] By carrying out the present invention, despite having a polymer outer sole, it has the same feel and appearance as a leather outer sole, and even if it is worn in the rain, it remains inside the shoe. It was possible to have an outsole that does not soak water.

Claims (1)

[Claims] 1. Polymer 100 parts by weight, leather powder 10
A polymer composition for an outer sole of a shoe, comprising 80 parts by weight and other required polymer compounding agents.