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Processing method of sponge rubber

A technology of sponge rubber and processing method, applied in the field of rubber material processing, can solve the problems of controlling the density, pore structure, size, and starting rate of the sponge rubber surface flatness, etc., and achieves good rubber surface condition, reduced shrinkage rate, The effect of large air volume

Active Publication Date: 2014-02-05
ANHUI TONGFENG RUBBER & PLASTIC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]Sponge rubber is a kind of foaming agent added to solid and liquid raw rubber. During the vulcanization process, the foaming agent is thermally decomposed while vulcanizing. Porous vulcanized rubber produced by gas generation, rubber sponge products are widely used, such as automotive door and window sealing strips, cushions, gaskets for building materials, vibration isolation materials, life jackets and shoes for leisure or construction, etc., the application number is 200810068002.9 The document discloses a sponge rubber composition and a preparation method thereof. The sponge rubber composition consists of EPDM rubber, filler, active agent, plasticizer, polar additive, vulcanizing agent, accelerator, foaming agent, Hygroscopic agent composition, wherein, the active agent includes zinc oxide, stearic acid, organic tellurium, the organic tellurium is at least dipropyl tellurium, dibutyl tellurium, n-butyl tellurium, methallyl tellurium One, while improving production efficiency, solves the corrosion problem of sponge rubber, but this preparation process cannot solve the problem of how to control the density, pore structure, size, firing rate and surface smoothness of sponge rubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A processing method of sponge rubber, the processing method comprises the steps:

[0020] (1) Baking glue: Put the neoprene rubber in the drying room for heating. The glue baking temperature is 24°C and the time is 4h, which can reduce the hardness and melt the crystals, which is convenient for cutting, and at the same time, it can volatilize the water. Lose.

[0021] (2) Cutting rubber: Take out the heated raw rubber from the rubber drying room, first peel off the outer skin of the rubber bag or brush to remove the sand and other debris on the surface, so that the raw rubber is pure and the size of the pores of the produced sponge rubber is large. Uniform and stable in structure, then put into the glue cutter for cutting.

[0022] (3) Glue breaking: Use a glue breaker to break the cut glue block. When breaking glue, the roller temperature is 44°C, and the roller distance is kept at 2mm, which can improve the production efficiency of sponge glue and ensure the quality ...

Embodiment 2

[0028] The rest is the same as in Example 1, except that in the step (1), the raw rubber is natural rubber, the baking temperature is 60°C, and the time is 6h. The roll temperature is kept at 40°C and the roll distance is kept at 3mm. In the step (4), the rubber roll is first plasticized for 15 minutes, then unloaded, cooled and parked for 8 hours, and the plasticization is repeated 3 times. In (5), the roll distance of the mill is adjusted to 10mm, and the mixing time is 5min. In the step (6), the temperature of the first-stage vulcanization mold is 120°C, and the temperature of the second-stage vulcanization mold is 160°C , in the step (7), the obtained sponge glue is parked for 200h in an environment with a temperature of 65°C.

Embodiment 3

[0030] The rest are the same as in Example 1, except that in the step (1), the raw rubber is natural rubber, the baking temperature is 30°C, and the time is 5h. The roller temperature is 37°C and the roller distance is kept at 2.5mm. In the step (4), the rubber roll is plasticized for 11 minutes, then unloaded, cooled and parked for 6 hours. In the step (5), Adjust the roll distance of the mill to 9mm, and the mixing time is 4.5min. In the step (6), the temperature of the first-stage vulcanization mold is 110°C, and the temperature of the second-stage vulcanization mold is 140°C. In (7), the obtained sponge glue was parked for 170h in an environment with a temperature of 68°C.

[0031] In the above three embodiments, the aging resistance and fatigue resistance of the obtained sponge glue are 20% higher than those of ordinary sponge glue, the heat generation under dynamic conditions is small, the shrinkage rate is increased by 17%, the surface is smooth, the hole size is unifor...

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Abstract

Relating to the processing field of rubber materials, the invention discloses a processing method of sponge rubber. The method includes the following seven steps of rubber drying, rubber cutting, rubber breaking, plastication, mixing, molding and vulcanization, and shrinkage treatment, etc. Crude rubber is placed in a drying room for heating so as to decrease hardness and melt crystals, thus facilitating cutting and making moisture volatilized at the same time. Before plastication, a well cut rubber block is subjected to rubber breaking by a rubber breaking machine, thus improving the production efficiency of sponge rubber, ensuring the quality of sponge rubber and production equipment safety. By adopting multi-stage plastication glue, the plastication temperature is low, the plasticization effect is good, and arbitrary plasticity requirement can be met. The rubber has good aging resistance and fatigue resistance, and low thermogenesis under a dynamic condition.

Description

technical field [0001] The invention relates to the field of rubber material processing, in particular to a processing method of sponge rubber. Background technique [0002] Sponge rubber is a kind of porous vulcanized rubber made by adding foaming agent to solid and liquid raw rubber. During the vulcanization process, the foaming agent is thermally decomposed to generate gas during vulcanization. Rubber sponge products are widely used. Such as automobile door and window sealing strips, buffer pads, gaskets for building materials, vibration isolation materials, life jackets and shoes for leisure or construction, etc., the application number is 200810068002.9 The document discloses a sponge rubber composition and a preparation method thereof, The marine surface rubber composition is composed of EPDM rubber, filler, active agent, plasticizer, polar additive, vulcanizing agent, accelerator, foaming agent, and hygroscopic agent, wherein the active agent includes zinc oxide, hard...

Claims

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Application Information

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IPC IPC(8): B29C35/02B29B7/74B29B15/02C08L11/00C08L7/00C08J9/10C08K13/02C08K3/22
Inventor 项宗武
Owner ANHUI TONGFENG RUBBER & PLASTIC IND
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