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Method for preparing leather carving foamed material

A foamed material and leather carving technology, applied in the field of foamed materials, can solve the problems of insufficient softness and shock resistance, insufficient resilience and low development density, and achieve safe production process, improved performance, and fewer production processes. Effect

Inactive Publication Date: 2018-11-06
ANHUI SOYA DECORATIVE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ethylene-vinyl acetate copolymer (EVA) foaming material has the advantages of light specific gravity, softness, shock absorption, non-toxicity, chemical resistance, etc., and is widely used in the production of leather carving foaming materials. As a lightweight material, EVA foam materials still have defects such as easy deformation, low tear resistance, and insufficient rebound performance, which limit its use, resulting in low development density and insufficient soft shock resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of leather carving foam material, the method includes the following steps:

[0029] S1. Pre-adjust the internal cavity temperature of the internal mixer to 100°C, and graft EVA resin, soluble starch graft vinyl acetate copolymer, modified attapulgite powder, and modified sepiolite clay into a mass ratio of 1:2.6:0.4:3.3 , After mixing evenly, add bis-tert-butylperoxycumene, carbon dioxide, and tetrabutyl titanate, mix for 10 minutes, and the internal mixer rotates at 30 rpm;

[0030] S2. After mixing, add the mixture to a two-roll two-roll mill to form a 0.5mm sheet, and then load the sheet after cooling to room temperature;

[0031] S3. The mixed flakes are cut and put into a mold sprayed with a release agent beforehand. After the water vapor evaporates, the module is put into a vulcanizer for molding and foaming. The molding temperature is 150°C and the molding time is 800s. The pressure is 22Mpa, the pressure is relieved and the mold is jumped, and the...

Embodiment 2

[0046] A preparation method of leather carving foam material, the method includes the following steps:

[0047] S1. Pre-adjust the internal cavity temperature of the internal mixer to 100°C, and graft EVA resin, soluble starch grafted with vinyl acetate copolymer, modified attapulgite powder, and modified sepiolite clay according to the mass ratio of 1:3.2:0.7:3.8 , After mixing evenly, add bis(2,4-dichlorobenzoyl) peroxide, azodicarbonamide, sodium bicarbonate, triallyl isocyanate, and mix for 15 minutes, and the mixer speed is 30rpm;

[0048] S2. After mixing, add the mixture to a two-roll two-roll mill to form a 0.8mm sheet, and then load the sheet after cooling to room temperature;

[0049] S3. The mixed flakes are cut and put into a mold sprayed with a release agent beforehand. After the water vapor evaporates, the module is put into a vulcanizer for molding and foaming. The molding temperature is 160°C and the molding time is 900s. The pressure is 30Mpa, the pressure is releas...

Embodiment 3

[0064] A preparation method of leather carving foam material, the method includes the following steps:

[0065] S1. Pre-adjust the internal cavity temperature of the internal mixer to 100°C, graft EVA resin, soluble starch graft vinyl acetate copolymer, modified attapulgite powder, and modified sepiolite clay into a mass ratio of 1:2.9:0.6:3.5 , After mixing evenly, add bis-tert-butylperoxycumene, bis(2,4-dichlorobenzoyl) peroxide, freon, triallyl isocyanate, and mix for 10-15min, and the mixer speed is 30rpm ;

[0066] S2. After the mixing, the mixture is added to a two-roll two-roll mill to form a 0.6mm sheet, and the sheet is cooled to room temperature and then mounted;

[0067] S3. The mixed flakes are cut and put into a mold sprayed with a release agent beforehand. After the water vapor evaporates, the module is put into a vulcanizer for molding and foaming. The molding temperature is 155°C and the molding time is 850s. The pressure is 26Mpa, the pressure is released and the m...

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Abstract

The invention discloses a method for preparing a leather carving foamed material. The method comprises the following steps: uniformly mixing an EVA ((Ethylene Vinyl Acetate) resin, a soluble starch grafted vinyl acetate copolymer, modified attapulgite powder and modified sepiolite clay, adding a foaming agent, a cross-linking agent and foaming aids, melting, putting a mixture into a double-rolleropen mill, pressing so as to obtain thin pieces, cutting the thin pieces, putting into a mold which is coated by a demolding agent in advance, evaporating off moisture completely, and carrying out molding foaming in a vulcanizing machine. An EVA product prepared by using the method not only has the property that the EVA foamed material is light in weight, good in thermal insulation and moisture resistance, free of toxicity, good in vibration resistance, and the like, but also can be foamed and molded at one time, is free of tedious preparation process, is relatively safe and scientific, good in comprehensive property, simple in preparation method, simple in production procedure, low in equipment investment and safe and environmentally friendly in production process, the use range of the EVA foamed material is widened, and use properties of a conventional foamed material are improved.

Description

Technical field [0001] The invention belongs to the technical field of foaming materials, and particularly relates to a preparation method of a leather carving foaming material. Background technique [0002] Polymer foam material is a gas / solid two-phase composite material composed of polymer matrix and gas molecules. In this two-phase composite material, the bubbles can be the dispersed phase and the polymer is the continuous phase; or the bubbles and the polymer are both continuous phases. The specific conditions are determined by the different connection modes between the bubbles. Ethylene-vinyl acetate copolymer (EVA) foam material has the advantages of light specific gravity, softness, shock absorption, non-toxicity, and chemical resistance. It is widely used in the production of leather carving foam materials and used as a lightweight material. EVA foam material still has defects such as easy deformation, low tear resistance, and insufficient resilience, which limits its u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/02C08L23/08C08K9/00C08K9/04C08K9/02C08K9/06C08K3/34C08F251/00C08F218/08C08J9/12C08J9/10C08J9/14
CPCC08F251/00C08J9/009C08J9/103C08J9/122C08J9/144C08J2203/06C08J2203/142C08J2351/02C08J2423/08C08K3/34C08K9/00C08K9/02C08K9/04C08K9/06C08F218/08
Inventor 李华令刘华平
Owner ANHUI SOYA DECORATIVE MATERIALS
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