Preparation method of waste tire rubber/polyethylene foam material

A waste tire rubber and polyethylene foaming technology is applied in the field of preparation of polymer blend materials, which can solve the problems of lack of competitive advantages, easy deformation of products, poor physical properties, etc., and improve interface interaction and compatibility. , the preparation process is simple, the production cost is low

Inactive Publication Date: 2010-10-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low hardness of polyolefin foam, the product is easy to deform, and its phys

Method used

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  • Preparation method of waste tire rubber/polyethylene foam material
  • Preparation method of waste tire rubber/polyethylene foam material
  • Preparation method of waste tire rubber/polyethylene foam material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0044] Example 1

[0045] (1) Drying of waste tire rubber powder

[0046] Spread a thin layer of waste tire rubber powder with an average particle size of 100μm in a blast oven and dry it at 100℃ for 0.5h;

[0047] (2) Solid phase mixture

[0048] Add 20 parts of dried waste tire rubber powder and 100 parts of recycled low-density polyethylene pellets into a mechanochemical reactor for solid-phase blending and shearing. The static pressure of the two grinding discs is controlled at 12000kN, the rotating speed is 150rpm, and the process is repeated 20 times. After the milling cycle, a uniformly mixed powdered compound is formed for use;

[0049] (3) Thermoplastic processing

[0050] Add 1 part of sodium bicarbonate, 1 part of antioxidant 1010, 2 parts of dicumyl peroxide, 2 parts of zinc oxide and 1 part of zinc stearate to the Brabender plasticizer. Melt blending, mixing temperature 150℃, rotor speed 30rpm, time 6min;

[0051] (4) Molded foam

[0052] 15 parts of the blended material aft...

Example Embodiment

[0053] Example 2

[0054] (1) Drying of waste tire rubber powder

[0055] Spread a thin layer of waste tire rubber powder with an average particle size of 180μm in a blast oven and dry it at a temperature of 60℃ for 2h;

[0056] (2) Solid phase mixture

[0057] Add 30 parts of dried waste tire rubber powder and 100 parts of high-density polyethylene pellets into a mechanochemical reactor for solid-phase blending and shearing. The static pressure of the two grinding discs is controlled at 18000kN, the rotating speed is 80rpm, and after 20 times of grinding After the grinding cycle, a uniformly mixed powdered compound is formed for use;

[0058] (3) Thermoplastic processing

[0059] Mix the above-mentioned materials uniformly with 2 parts of calcium bicarbonate, 10102 parts of antioxidants, 1 part of 2,5-dimethyl-2,5-bis(tert-butperoxy) hexane, 1 part of zinc oxide and hard Add 1 part of calcium fatty acid to the Brabender plasticizer for melt blending, the mixing temperature is 120°C, t...

Example Embodiment

[0062] Example 3

[0063] (1) Drying of waste tire rubber powder

[0064] Spread a thin layer of waste tire rubber powder with an average particle size of 250μm in a blast oven and dry it at 80℃ for 1h;

[0065] (2) Solid phase mixture

[0066] Add 40 parts of dried waste tire rubber powder and 100 parts of low-density polyethylene pellets into a mechanochemical reactor for solid-phase blending and shearing. The static pressure of the two grinding discs is controlled at 22000kN, the rotation speed is 30rpm, and after 20 times of grinding After the grinding cycle, a uniformly mixed powdered compound is formed for use;

[0067] (3) Thermoplastic processing

[0068] Add 5 parts of azodicarbonamide, 2 parts of dicumyl peroxide, 4 parts of zinc oxide, 1.5 parts of stearic acid, and 10102 parts of antioxidants to the Brabender plasticizer. Melt blending, mixing temperature 135℃, rotor speed 50rpm, time 10min;

[0069] (4) Molded foam

[0070] Put 15 parts of the blended material after thermopl...

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Abstract

The invention discloses a preparation method of waste tire rubber/polyethylene foam material, which is characterized in that: 20 to 40 weight parts of waste tire rubber and 100 weight parts of polyethylene are added into a dynamic chemical reactor (ZL95111258.9) to be milled at room temperature so that part of the waste tire rubber (WTR) is desulfurized and the surface thereof is activated; simultaneously, the WTR and the PE are mixed at high efficiency to obtain the WTR/PE composite powder which is uniformly mixed with the average grain size of 10 to 100mu m; the composite powder is added into a mixer, then is sequentially added with 1 to 5 weight parts of foaming agent, 1 to 3 weight parts of cross linker, 0.5 to 2 weight parts of antioxidant, 0.5 to 4 weight parts of zinc oxide and 0.5 to 2 weight parts of lubricant to be melted and mixed to obtain the mixture of the waste tire rubber/polyethylene foam material; and then the mixture is put into a plate rheometer to be stamped, foamed and formed to obtain the waste tire rubber/polyethylene foam material. The foam material has the advantages of environmental protection, low energy consumption, high production efficiency and relative lower production cost.

Description

technical field [0001] The invention relates to a preparation method of waste tire rubber powder / polyethylene foam material, which belongs to the field of preparation of polymer blend materials. Background technique [0002] With the rapid development of the automobile industry, the disposal of waste tires has become a major problem in today's society. At present, there are three main ways to deal with waste tires: burning, landfilling and recycling. Among them, recycling is the most environmentally friendly and effective way to solve the problem of waste tires. Since waste tire rubber is a three-dimensional cross-linked polymer after vulcanization of rubber, it cannot be melt-processed, let alone blended with other thermoplastic materials as a matrix. Waste tire rubber contains a large amount of elastomer, carbon black, zinc oxide, stearic acid, vulcanizing agent, process oil and other substances. Most tire rubber contains natural rubber and styrene-butadiene rubber, whi...

Claims

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Application Information

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IPC IPC(8): B29C67/20
Inventor 卢灿辉梁梅朱健张新星
Owner SICHUAN UNIV
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