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Blown rubber for thick product and variable temperature mould pressing preparation method thereof

A technology for foaming rubber and thick products, which is applied in the field of foam rubber for thick products and its variable temperature molding preparation. It can solve the problems affecting product appearance and quality, inconsistent cell structure, and insufficient porosity, and achieve high strength, Uniform foaming and low compression set

Inactive Publication Date: 2013-05-08
JIANGYIN HAIDA RUBBER & PLASTIC GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foam rubber with large size, especially thick products, is prone to problems such as insufficient local porosity, uneven cells, and inconsistent cell structure during the production process, which affects product appearance and quality
How to overcome such problems in the actual production of thick foamed rubber has great practical significance, but there are few reports

Method used

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  • Blown rubber for thick product and variable temperature mould pressing preparation method thereof
  • Blown rubber for thick product and variable temperature mould pressing preparation method thereof
  • Blown rubber for thick product and variable temperature mould pressing preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The components and mass parts are: 100 parts of 1# smoked sheet glue, 5 parts of active zinc oxide, 5 parts of stearic acid, 2 parts of foaming agent H, 8 parts of sodium bicarbonate, 30 parts of calcium carbonate, 300# paraffin wax 20 parts of oil, 10 parts of carbon black N774, 10 parts of fumed silica, 1.5 parts of anti-aging agent RD, 1.5 parts of anti-aging agent MB 1.5, 1.5 parts of anti-aging agent 4010NA, 1.5 parts of paraffin wax, 2 parts of microcrystalline wax, 2 parts of accelerator DM, Accelerator TMTD 0.5 parts, accelerator PZ 1.2 parts, sulfur 0.8 parts.

[0041] The preparation process of Example 1 is as follows: on the 16-inch open type rubber mixing machine, the natural rubber is thinly passed 30 times with the minimum roller distance; after being fully parked, the natural rubber is thinly passed 10 times, and then the roller distance is increased to about 5mm before wrapping and feeding , and then add carbon black, plasticizer, filler, foaming agent, ...

Embodiment 2

[0044] The components and parts by mass are: 100 parts of EPDM rubber 2340A, 5 parts of activated zinc oxide, 3 parts of stearic acid, 4 parts of foaming agent OBSH, microencapsulated urea AF (produced by Zhenjiang Thorpe Group) 2 6 parts of sodium bicarbonate, 40 parts of talcum powder, 20 parts of calcium carbonate, 40 parts of 150s engine oil, 10 parts of carbon black N990, 10 parts of fumed silica, 1 part of anti-aging agent RD, 1 part of anti-aging agent 4020, promote 2 parts of accelerator DM, 1.5 parts of accelerator CZ, 0.8 parts of accelerator TMTD, 1.5 parts of accelerator PZ, 0.8 parts of accelerator M, and 1.5 parts of sulfur.

[0045] The preparation process of embodiment 2 is: on the 16-inch open-type rubber mixing machine, the low Mooney EPDM rubber is thinly passed 10 times with the minimum roll distance; then raw rubber, carbon black, plasticizer, filler, Foaming agent and anti-aging agent are added to the closed rubber mixer in proportion and mixed evenly, an...

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Abstract

The invention relates to a blown rubber for a thick product. The blown rubber comprises a raw rubber matrix, a filler, carbon black, a plasticizer, a vulcanizing agent, a vulcanization accelerator, a blowing agent and an antiager, wherein the blowing agent is compounded by an organic blowing agent, a blowing activator and an inorganic blowing agent, and the organic blowing agent is a blowing agent AC, blowing agent H or a blowing agent OBSH (p,p'-oxybis(benzenesulfonyl hydrazine)). In preparation, the raw materials are mixed and extruded to form mixed material films, the mixed films are placed in a die, the pressure of a plate vulcanizer is regulated to 13-15MPa, and the temperature is regulated according to following time ranges for sulfide forming: the first stage: 60-70 DEG C, 30-60 minutes; the second stage: 80-100 DEG C, 30-40 minutes; the third stage: 110-140 DEG C, 30-40 minutes, and then the blown rubber composite can be obtained. The product has good apparent density and strength and is uniform in foaming.

Description

technical field [0001] The invention relates to a foamed rubber for thick products and a preparation method thereof by variable temperature molding. Background technique [0002] Foam rubber has excellent cushioning, sealing, heat insulation and sound insulation properties, and can be used as shockproof, heat insulation, waterproof, and sound insulation materials in construction, transportation, medical machinery, aerospace and other fields. Natural rubber (NR) is the earliest rubber used by humans. It has good self-reinforcing properties and is easy to masticate. It is a rubber with excellent comprehensive properties; NR raw rubber and its products are easily degraded by oxygen, ozone, ultraviolet rays and other active substances during storage and use, which limits the application of foamed natural rubber. The EPDM foam rubber has very good ozone resistance and heat resistance due to the saturation of the main chain, and can be used in occasions that require good ozone re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L23/16C08K13/02C08K3/04C08K3/06C08K3/36C08K3/26C08K3/34C08J9/08C08J9/10B29C35/02B29B7/28B29B7/72B29B9/00B29C47/92B29C48/92
CPCB29C48/92B29C48/875B29C2948/92514B29C2948/92561B29C2948/92704B29C2948/92895B29C2948/92923
Inventor 李波贡健庄澎高蒙蒙徐峰
Owner JIANGYIN HAIDA RUBBER & PLASTIC GROUP
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