Modified EVA microporous elastomer composite material and preparation method thereof

A technology of microcellular elastomers and composite materials, applied in the field of elastomer composite materials, can solve the problems of inability to meet the use in special fields, poor uniformity of material cells, low tensile strength of EVA microcellular elastomers, etc., and achieves easy operation. , the effect of improved tensile modulus and simple preparation method

Inactive Publication Date: 2009-10-14
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tensile strength of the EVA microcellular elastomer prepared by the above method is lo

Method used

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  • Modified EVA microporous elastomer composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

[0041] Mix 200g of EVA on an open two-roll mixer with a roll temperature of 90°C through a triangular bag repeatedly for 5 minutes, and then mix the mass percentages to 6%, 0.6%, 0.2%, 0.4% and 0.2% respectively. Add foaming agent, DCP, zinc oxide, zinc stearate and stearic acid to the EVA, and then continue mixing on the open two-roll mixer with a triangular bag for 25 minutes;

[0042] Coat the inner wall of the metal mold with release agent evenly, and then heat the metal mold to 150°C; put the mixed modified EVA material into the metal mold, seal the mold and put it in an oven to heat to 150, keep warm After cooling for 20 minutes, the mold was released to obtain an EVA microporous elastomer material. The tensile strength of the prepared material is 1.97 MPa, and the elongation at break is 84.39%.

Example Embodiment

[0043] Example 2

[0044] EVA 200g, 20g polyurethane and 15g styrene-butadiene rubber were repeatedly mixed for 25min on an open two-roll mixer with a roll temperature of 90℃ through a triangular bag, and then the mass percentages were 6%, 0.6%, 0.2% , 0.4% and 0.2% de foaming agent, DCP, zinc oxide, zinc stearate and stearic acid are added to EVA, and then continue to be repeatedly mixed for 25 minutes on the open two-roller mixer with a triangular bag;

[0045] Coat the inner wall of the metal mold with release agent evenly, and then heat the metal mold to 150°C; put the mixed modified EVA material into the metal mold, seal the mold and put it in an oven to heat to 150, keep warm After cooling for 20 minutes, the mold was released to obtain an EVA microporous elastomer material. The tensile strength of the prepared material is 2.23 MPa, and the elongation at break is 104.23%.

Example Embodiment

[0046] Example 3

[0047] 200g of EVA, 20g of polyurethane and 15g of styrene butadiene rubber were repeatedly mixed for 25 minutes on an open two-roll mixer with a roll temperature of 90℃ in a triangular bag, and then 1% organic montmorillonite was added to the modified The EVA material is continuously mixed on an open two-roller mixer with a triangular bag for 25 minutes;

[0048] Add the mass percentages of 6%, 0.6%, 0.2%, 0.4% and 0.2% de foaming agent, DCP, zinc oxide, zinc stearate and stearic acid to the modified EVA material, and then continue to open Repeated mixing for 25 minutes on a double-roll mixer with a triangular bag;

[0049] Coat the inner wall of the metal mold with release agent evenly, and then heat the metal mold to 150°C; put the mixed modified EVA material into the metal mold, seal the mold and put it in an oven to heat to 150, keep warm After cooling for 20 minutes, demoulding to obtain modified EVA microporous elastomer material. The tensile strength of ...

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Abstract

The invention provides a modified EVA microporous elastomer composite material and a preparation method thereof. In the prior art, the properties of the EVA microporous elastomer composite material are modified mainly by mixing fillings in the EVA, which cannot satisfy the use of the composite material in special fields. The formula includes EVA material, organic montmorillonite, polyurethane, styrene-butadiene rubber, foaming agent, zinc oxide, zinc stearate and stearic acid; and the preparation method comprises the steps of: adding the montmorillonite in the EVA for melting, shearing and dispersion treatment; mixing with the polyurethane and the styrene-butadiene rubber on a double-roller mixing machine after cooling; and adding auxiliary agent, thin-passing for more than ten times, taking off sheets and cutting; coating parting agent on the inner wall of a metal mould, heating, drying, adding the cut mixture to the mould, sealing, heating for 20 minutes, cooling and demoulding. By adopting a nano-intercalation technology, the invention greatly improves the tensile modulus of the modified EVA microporous elastomer material on the premise of basically not decreasing the toughness.

Description

technical field [0001] The invention belongs to the field of elastomer composite materials, and in particular relates to a modified EVA microporous elastomer composite material and a preparation method thereof, in particular to a modified EVA microporous elastomer composite material reinforced by nano fillers and a preparation method thereof. Background technique [0002] Ethylene-vinyl acetate copolymer resin (EVA) is a kind of thermoplastic with rubber elasticity. In EVA molecules, due to the presence of vinyl acetate (VAc), the regularity of polyethylene (PE) molecular chains is reduced, and its crystallinity decreases accordingly, so that the molecular chains have a great ability to internally rotate during thermal motion. The improvement of its flexibility is significantly improved, and its macroscopic performance is very high elasticity. EVA with a VAc content of 12% to 30% can be used to manufacture high-rate independent cell room temperature foam plastics. It is wid...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08K13/02C08K3/34C08K3/22C08K5/098C08K5/09C08J9/04
Inventor 马建中赫玉欣张玉清高党鸽吕斌
Owner SHAANXI UNIV OF SCI & TECH
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