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Method for manufacturing rubber sheet

A manufacturing method and technology for rubber sheets, applied in the field of rubber sheet manufacturing, can solve the problems of low service life, instability, poor cold resistance, etc., and achieve the effects of good viscosity, prolonging service life and enhancing viscose ability.

Inactive Publication Date: 2015-05-06
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of chloroprene rubber are electrical insulation performance, poor cold resistance, raw rubber is unstable during storage, and when used to manufacture rubber sheets for centrifugal pumps or diaphragm pumps in slurry transportation, the service life is low and the ductility is not good. Well, this invention changes these disadvantages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of manufacture method of rubber sheet, its processing step is as follows:

[0020] (1) mastication: get neoprene raw powder 145g, nitrile rubber raw powder 45g to carry out mastication, improve its plasticity, the addition of acetonitrile rubber increases ductility;

[0021] (2) Mixing: Add carbon black 30g, short fiber 10g, stearic acid 5g, anti-aging agent 1.5g and accelerator DM44.0g in the plasticized butadiene rubber raw powder and nitrile rubber raw powder. The mixing and mixing conditions in the machine are 8MPa, 190°C, 20min;

[0022] (3) Molding: Pour the molten slurry obtained from mixing into the mold under heat, and cool and dry it in a vacuum environment at 25°C for 24 hours to form a rubber sheet. The air bubbles in the rubber mixture can be removed under vacuum conditions, and slowly cooled at room temperature , it is not easy to make the colloid crack when drying, making it more compact;

[0023] (4) Treatment: Take two pieces of 0.1mm polyureth...

Embodiment 2

[0031] Example 2: the rest are the same as in Example 1, the difference is that in (2) step, the mixing condition is 8MPa, 100°C, 1h, but at such temperature, prolonging the time can not enhance the mixing As a result, the obtained mixed rubber is easy to crack.

Embodiment 3

[0032] Embodiment 3: all the other are identical with described embodiment 1, and difference is, in (5) step, the thickness of isocyanate glue is coated a little thinner, is the same with pregelatinized thickness, and polyurethane film is easy to come off.

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Abstract

The invention discloses a method for manufacturing a rubber sheet and relates to the field of manufacturing of rubber. The preparation of the rubber sheet is completed by seven steps, namely, plastifying, mixing, molding, processing, coating, gluing and drying, wherein in the preparation of the rubber sheet, the plastifying is firstly performed to improve the plasticity of the rubber so that rubber can be well mixed together with other substances in the subsequent steps; acetonitrile rubber is added to increase the ductility of the rubber; in the molding step, under a vacuum environment, the rubber is cooled and dried for 24 hours at 25 DEG C, bubbles in mixed rubber can be stripped under vacuum condition, the rubber is slowly cooled at room temperature so that cracks are hardly caused during the drying of colloid and the rubber is more compact; the phenomenon that the middle part is easily worn compared to the both end parts although the effectiveness of chloroprene rubber is better is mainly considered, two polyurethane films are adopted and added so as to prolong the service life of the rubber sheet.

Description

technical field [0001] The invention relates to the field of rubber manufacturing, in particular to a method for manufacturing a rubber sheet. Background technique [0002] Rubber: A highly elastic polymer material with reversible deformation. It is elastic at room temperature, can produce large deformation under a small external force, and can return to its original shape after the external force is removed. Rubber is a completely amorphous polymer, its glass transition temperature (T g) is low, and its molecular weight is often large, greater than hundreds of thousands. made by co-aggregation. Such as high tensile strength, excellent heat resistance, light resistance, aging resistance, and oil resistance are superior to natural rubber, styrene-butadiene rubber, and butadiene rubber. It has strong flame resistance and excellent flame retardancy resistance, high chemical stability and good water resistance. The disadvantages of chloroprene rubber are electrical insulatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/12B32B25/08C08L11/00C08L9/02C08K13/04C08K7/06C08K3/04C08K5/09
CPCB32B37/1284B32B25/08B32B27/40C08K3/04C08K5/09C08K7/06C08K13/04C08L9/02C08L11/00
Inventor 崔强军刘新亮
Owner GUANGXI UNIV
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