Composite foamed shoe material formed by polyolefin and polyolefin elastomers grafted with starch in dry process

A technique of grafting polyolefins and polyolefins, which is applied in the field of dry-process grafting of starch to polyolefins and polyolefin-based elastomer composite foam shoe materials, can solve the problem of poor mechanical properties of materials, no use value, relative Poor compatibility and other problems, achieve good compatibility problems, solve compatibility problems, and achieve the effect of small compression deformation

Active Publication Date: 2012-11-21
福建省卓睿新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since starch contains a large number of hydroxyl groups, it is a hydrophilic substance, and EVA is an ethylene-vinyl acetate copolymer, which is a hydrophobic substance, so the compatibility between the two is poor. If the two are not treated, they will easily dissolve in the EVA matrix. Agglomeration or falling off under the action of external force, resulting in poor mechanical properties of the prepared material, and basically no use value

Method used

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  • Composite foamed shoe material formed by polyolefin and polyolefin elastomers grafted with starch in dry process
  • Composite foamed shoe material formed by polyolefin and polyolefin elastomers grafted with starch in dry process

Examples

Experimental program
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Effect test

Embodiment 1-5

[0030] Take each raw material according to the composition of raw materials, and mix plasticized starch with EVA, elastomer, inorganic filler, stearic acid, zinc stearate, zinc oxide, starch initiator ammonium persulfate, polyolefin and polyolefin elastomer initiator Add BPO, foaming agent, and crosslinking agent to the internal mixer, and mix and plasticize at 110-130°C for 5-10 minutes to obtain a plasticized composite material of starch-grafted polyolefin and polyolefin elastomer, and then use open The mill pulls down the sheet at 45-90°C, and finally foams at 170-180°C with a flat vulcanizer to obtain the composite foamed shoe material of starch dry grafted polyolefin and polyolefin elastomer.

[0031] Table 1 Cassava starch composite foam shoe material formula (by mass parts)

[0032]

[0033] Among them, the specific ratio of other additives is: 0.8 parts of stearic acid, 1.2 parts of zinc stearate, 3 parts of zinc oxide, and 1.6 parts of EVA quick-ripening agent CH-0...

Embodiment 6-10

[0035] According to the composition of the raw materials in Table 2, each raw material was taken, and the processing steps and process parameters were the same as those in Examples 1-5, and the composite foamed shoe material of starch dry-grafted polyolefin and polyolefin elastomer was obtained.

[0036] Table 2 Corn starch composite foam shoe material formula (by mass parts)

[0037]

[0038] Among them, the specific proportions of other additives are: 0.8 parts of stearic acid, 1.2 parts of zinc stearate, 3 parts of zinc oxide, and 1.6 parts of EVA quick-curing agent CH-09.

Embodiment 11-15

[0040] According to the composition of the raw materials in Table 3, each raw material was taken, and the processing steps and process parameters were the same as those in Examples 1-5, and a composite foamed shoe material of starch dry-grafted polyolefin and polyolefin elastomer was obtained.

[0041] Table 3 Potato starch composite foam shoe material formula (by mass parts)

[0042]

[0043] Among them, the specific proportions of other additives are: 0.8 parts of stearic acid, 1.2 parts of zinc stearate, 3 parts of zinc oxide, and 1.6 parts of EVA quick-curing agent CH-09.

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Abstract

The invention provides a composite foamed shoe material formed by polyolefin and polyolefin elastomers grafted with starch in a dry process and a preparation method thereof. According to the invention, widely available and fully degradable starch is used for dry graft copolymerization with EVA resin and elastomers in an internal mixer, additives like an inorganic filler, a cross-linking agent and a foaming agent are added, and then specific process flow is employed so as to prepare the composite foamed shoe material formed by polyolefin and polyolefin elastomers grafted with starch in a dry process. The method provided by the invention can well overcome the problem of compatibility of starch with EVA resin, a solvent is not needed in the process of grafting, an obtained grafted copolymer does not need to be separated, and the method has the advantages of simple operation, convenient processing and high practicability.

Description

technical field [0001] The invention provides a method for preparing composite foamed shoe materials grafted with starch dry-process polyolefin and polyolefin elastomer. Background technique [0002] Ethylene-vinyl acetate (EVA) has the advantages of good plasticity, elasticity, light weight after foaming, good mechanical properties, easy coloring and comfortable wearing, and is deeply loved by the shoe material industry. However, EVA belongs to the elastomer of polyolefin, which has stable performance in the natural environment, is difficult to degrade, and is easy to cause white pollution, threatening the living environment of human beings. And starch comes from green plants, which is inexhaustible, and has complete biodegradability in various environments, and the development of starch application is conducive to increasing farmers' income and promoting the development of rural economy. More importantly, relevant literature shows that starch can promote the degradation o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L3/02C08L53/02C08L7/00C08L23/16A43B1/14C08K13/06C08K9/06C08K9/04C08K3/34C08J9/10
Inventor 郑玉婴林锦贤张由芳
Owner 福建省卓睿新材料科技有限公司
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