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Functional gradient foamed sole material and preparation method thereof

A functional gradient and shoe sole material technology, applied in shoe soles, footwear, applications, etc., can solve the problems of cumbersome procedures, not conducive to environmental protection, large shrinkage, etc., and achieve the effect of comfortable wearing and conducive to energy return.

Active Publication Date: 2013-09-25
CHINA LEATHER & FOOTWEAR IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of this operation process: (1) the process is more cumbersome and the production cycle is long
Different foam sheets must be foamed separately, and the production cycle is longer
(2) Labor costs are high
(3) Not conducive to environmental protection
However, because one side of the foam material has high elasticity and low hardness, the shrinkage rate will be larger as the storage time prolongs; the other side has moderate elasticity and high hardness, and the shrinkage rate will be smaller as the storage time prolongs
The shrinkage rate of different foam layers is different, which causes the foamed material to warp to the side with a larger shrinkage rate; and after repeated experiments, it is also found that the greater the difference in hardness and elasticity between layers, the greater the warpage of the foamed material. serious

Method used

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  • Functional gradient foamed sole material and preparation method thereof
  • Functional gradient foamed sole material and preparation method thereof
  • Functional gradient foamed sole material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The composition (mass ratio) is: 100 parts of EVA, 20 parts of talcum powder, 3.5 parts of AC, 5 parts of zinc oxide, 3 parts of zinc stearate, and 1.5 parts of crosslinking agent DCP.

[0034] Weigh the material according to the above ratio, mix with an internal mixer within the range of 80°C-110°C, and the rotor speed is at 30-60 rpm, after mixing evenly, quickly open the mixer within the range of 80°C-110°C The roll distance is 1mm, and the sheet is released, and it is parked at room temperature for more than 24 hours. The mixed rubber is cut to be consistent with the length and width of the mold, and the flat vulcanizer is used for molding and foaming. : 6min~12min, take it out and cool it down to make foam. The sample was tested at 23°C for more than 24 hours. According to the GB / T1681-1991 standard tester, the impact rebound rate was 40%; according to the GB / T531.1-2008 standard, the Shore C hardness was 60.

Embodiment 2

[0036] The composition (mass ratio) is: 90 parts of EVA, 10 parts of POE, 20 parts of talcum powder, 3.5 parts of AC, 5 parts of zinc oxide, 3 parts of zinc stearate, and 1.5 parts of crosslinking agent DCP.

[0037] Weigh the material according to the above ratio, mix with an internal mixer within the range of 80°C-110°C, and the rotor speed is at 30-60 rpm, after mixing evenly, quickly open the mixer within the range of 80°C-110°C The roll distance is 1mm, and the sheet is released, and it is parked at room temperature for more than 24 hours. The mixed rubber is cut to be consistent with the length and width of the mold, and the flat vulcanizer is used for molding and foaming. : 6min~12min, take it out and cool it down to make foam. The sample was tested at 23°C for more than 24 hours. According to the GB / T1681-1991 standard tester, the impact rebound rate was 42%; according to the GB / T531.1-2008 standard, the Shore C hardness was 56.

Embodiment 3

[0039]The composition (mass ratio) is: 80 parts of EVA, 20 parts of POE, 20 parts of talcum powder, 3.5 parts of AC, 5 parts of zinc oxide, 3 parts of zinc stearate, and 1.5 parts of crosslinking agent DCP.

[0040] Weigh the material according to the above ratio, mix with an internal mixer within the range of 80°C-110°C, and the rotor speed is at 30-60 rpm, after mixing evenly, quickly open the mixer within the range of 80°C-110°C The roll distance is 1mm, and the sheet is released, and it is parked at room temperature for more than 24 hours. The mixed rubber is cut to be consistent with the length and width of the mold, and the flat vulcanizer is used for molding and foaming. : 6min ~ 12min, take it out and cool it down to make foam. The sample was tested at 23°C for more than 24 hours. According to the GB / T1681-1991 standard tester, the impact rebound rate was 45%; according to the GB / T531.1-2008 standard, the Shore C hardness was 50.

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Abstract

The invention relates to an insole material of a sneaker and a preparation method thereof, and particularly relates to a functional gradient insole material of the sneaker and the preparation method thereof. The sole material mainly comprises ethylene-vinyl acetate copolymer (EVA), ethylene-octene copolymer (POE), a crosslinking agent, a filler, a foaming agent, and a foaming promoter. Two-layer or multi-layer heterogeneous expandable rubber compound of which the performance continuously changes in the thickness or length direction of the material is foamed and molded to prepare the foamed sole material in a once mold pressing manner on the basis that EVA and POE are foamed. The foamed sole material has the advantages that (1) the functionality (for example, rebound resilience and hardness) of the prepared foamed sole material forms gradient change along the thickness direction, the hardness of the foamed material at one side near pelma is small, the rebound resilience is high, energy feedback is facilitated, the foamed material at one side near outsoles is large and the elasticity is low so as to provide enough support, thus, the foamed sole material is more comfortable to wear in maximal extent; (2) compared with the comfortable foamed sole material in the market at present and the preparation method, the material cost of the binder is saved, labor charges are saved, the molding period is shortened, and environment protection is facilitated.

Description

(1) Technical field [0001] The invention relates to a sports shoe midsole material and a preparation method thereof, in particular to a functionally gradient foamed sole material and a preparation method thereof. (2) Background technology [0002] Functional Gradient Materials (Functional Gradient Materials abbreviated as FGM) is to make the elements of the material (composition, structure, porosity, concentration) change continuously along the thickness direction from one side to the other during the manufacturing process, so that there is no obvious internal Interface, so that the properties and functions of the material are also a new material that changes continuously. Compared with composite materials, the composition of functionally graded materials changes gradually from one side to the other, and there is no specific interface, so that the properties of the material change smoothly, thus easing the stress between the surface layer and the bottom layer, resulting in b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08K5/14C08K3/22C08K3/26C08K3/34C08K3/36A43B13/04
Inventor 常素芹王旭贯丽华
Owner CHINA LEATHER & FOOTWEAR IND RES INST
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