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A kind of high-gloss barium and talcum powder blend modified EVA foaming material and its preparation

A foaming material, blending and modification technology, applied in the field of foaming materials, can solve problems such as poor smoothness, limited application, and insufficient surface density, and achieve good operability, better operability, and finer Effect of Surface Density

Active Publication Date: 2020-08-11
SANSD JIANGSU ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the EVA foam material prepared by filling with calcium carbonate has the problem of porous interlayer, its surface density is not fine enough, the smoothness is not good, and its application is limited.

Method used

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  • A kind of high-gloss barium and talcum powder blend modified EVA foaming material and its preparation
  • A kind of high-gloss barium and talcum powder blend modified EVA foaming material and its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A high-gloss barium and talcum powder blended modified EVA foam material, including the following preparation raw materials calculated by weight: ethylene-vinyl acetate copolymer EVA70Phr, high-gloss barium 20Phr, talcum powder 30Phr, foaming agent 5.0Phr, zinc oxide 2.0 Phr, stearic acid 1.0Phr, peroxide crosslinking agent 0.65Phr, pigment 1.0Phr.

[0029] The EVA is 18J3 produced by Yanshan Petrochemical, and the acetic acid content is 18%. The high-gloss barium is submicron ultrafine barium sulfate, with a mesh number of 3000 mesh or more; the silicon content of the talc powder exceeds 46%, and the mesh number exceeds 1500 mesh; the foaming agent is azodicarbonamide; The peroxide crosslinking agent is dicumyl peroxide or di-tert-butylperoxycumene.

[0030] The preparation of the above-mentioned high-gloss barium and talcum powder blended modified EVA foam material comprises the following steps:

[0031] (1) Weighing: Accurately weigh the required raw materials acco...

Embodiment 2-3

[0038] Concrete preparation raw material ratio is as shown in Table 1, and all the other are identical with embodiment 1.

[0039] Table 1 embodiment 2-3 preparation raw material formula unit Phr

[0040] raw material EVA talcum powder High Gloss Barium Foaming agent DCP stearic acid Zinc oxide pigment Example 2 80 25 25 6.0 0.7 1.2 3.0 2.0 Example 3 90 20 30 7.0 0.8 1.5 4.0 3.0

[0041] Remarks: Among them, DCP is a peroxide crosslinking agent.

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Abstract

The invention discloses a high light barium sulfate and talcum powder blending modified EVA (ethylene) foaming material and preparation thereof. By weight, 70 to 100Phr of EVA, 15 to 30Phr of high light barium sulfate, 15 to 30Phr of talcum power, 4.0 to 10.0Phr of foaming agent, 2.0 to 4.0Phr of zinc oxide, 1.0 to 1.5Phr of stearic acid, 0.6 to 1.0Phr of peroxide cross-linking agent and 0.6 to 1.0Phr of pigment are prepared into the high light barium sulfate and talcum powder blending modified EVA foaming material through technical processes of weighing, banburying, open milling, slice discharging, curing and foaming, cooling molding and processing. By high light barium sulfate and talcum powder blending modified EVA foaming, the material has very good dispersity, thermal conductivity and lubricity, mixing effect and operability in banburying and open milling technologies are better, physical properties are better, surface density of the EVA foaming material is effectively refined, furthermore, on the premise that the hardness is not changed, the foaming size is increased by 20 percent or more, cost is effectively reduced, and the problem of a loose hole interlayer caused by uneven heat transmission in a die foaming process, which is common in EVA foaming, is also solved. Furthermore, a preparation process is simple, and industrial degree is high.

Description

technical field [0001] The invention relates to the field of foaming materials, in particular to a high-gloss barium and talcum powder blended modified EVA foaming material and its preparation. Background technique [0002] Foaming material refers to the foaming material that can gasify inside the material to generate bubbles to make it a porous material, such as making foamed plastics, foamed rubber, foamed resin, etc. Foamed materials are widely used in various industries, especially packaging materials, because the interior of the material is filled with gas, and has the advantages of light weight, good elasticity, and soft density. [0003] EVA foam materials are widely used in shoe materials, packaging materials, toy materials and other fields, and are relatively mature and common materials today. In the EVA foaming system, it is necessary to add filler materials to modify, generally choose calcium carbonate to fill. However, the EVA foam material prepared by filling ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K13/02C08K3/30C08K3/34C08J9/10
CPCC08J9/103C08J2203/04C08J2323/08C08K3/30C08K3/34C08K13/02C08K2003/3045C08K2201/003C08L2203/14C08L23/0853
Inventor 陈渠鍫丁华雄刘春林
Owner SANSD JIANGSU ENVIRONMENTAL PROTECTION TECH
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