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High-temperature-resistant heat shrinkage silicon rubber and EVA rubber plastic blending closed hole molding pressing high-temperature secondary foaming material and preparation method thereof

A secondary foaming and silicone rubber technology, applied in the field of foaming materials, can solve the problems of easy foaming and low foaming ratio

Pending Publication Date: 2019-05-28
YIBAO FUJIAN POLYMER MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the density of existing silicone rubber foam materials is still relatively high, and the expansion ratio is low. If the expansion ratio is increased, high temperature secondary foaming is bound to be required, and foaming is very easy to occur. At the same time, the thermal shrinkage rate is very high when resisting high temperatures. , has always been a hot issue in the research of the molded silicone rubber foaming industry. At present, there is no report on the high-temperature heat-shrinkable silicone rubber and EVA rubber-plastic blended closed-cell molded high-temperature secondary foaming material.

Method used

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  • High-temperature-resistant heat shrinkage silicon rubber and EVA rubber plastic blending closed hole molding pressing high-temperature secondary foaming material and preparation method thereof
  • High-temperature-resistant heat shrinkage silicon rubber and EVA rubber plastic blending closed hole molding pressing high-temperature secondary foaming material and preparation method thereof
  • High-temperature-resistant heat shrinkage silicon rubber and EVA rubber plastic blending closed hole molding pressing high-temperature secondary foaming material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A preparation method of high-temperature heat-shrinkable silicone rubber and EVA rubber-plastic blended closed-cell molded high-temperature secondary foaming material:

[0050] (1) EVA refining with internal mixer:

[0051] According to the proportion by weight, put 100 parts of EVA and 0.2 parts of stearic acid into the internal mixer, pressurize to 7 kg, knead for 15 minutes, and discharge when the temperature reaches 110 ° C ± 5 ° C;

[0052] (2) Open mill EVA open refining:

[0053]Put the plain rubber into the open mill, control the temperature at 90°C ± 5°C, turn over the 5mm material for 180 seconds, and cut it with a thickness of 2mm into the corresponding weight for temporary storage.

[0054] (3) Internal mixer mixing:

[0055] a. According to the formula weight parts, silicone rubber, 50 parts of EVA obtained in step (2), 9 parts of reinforcing agent, 15 parts of auxiliary reinforcing agent, 8 parts of cell stabilizer, 8 parts of high temperature resistant ...

Embodiment 2

[0069] A preparation method of high-temperature heat-shrinkable silicone rubber and EVA rubber-plastic blended closed-cell molded high-temperature secondary foaming material:

[0070] (1) EVA refining with internal mixer:

[0071] According to the proportion by weight, put 100 parts of EVA and 0.2 parts of stearic acid into the internal mixer, pressurize to 7 kg, knead for 15 minutes, and discharge when the temperature reaches 110 ° C ± 5 ° C;

[0072] (2) Open mill EVA open refining:

[0073] Put the plain rubber into the open mill, control the temperature at 90°C ± 5°C, turn over the 5mm material for 180 seconds, and cut it with a thickness of 2mm into the corresponding weight for temporary storage.

[0074] (3) Internal mixer mixing:

[0075] a. According to the formula weight parts, silicone rubber, 20 parts of EVA obtained in step (2), 10 parts of reinforcing agent, 10 parts of auxiliary reinforcing agent, 10 parts of cell stabilizer, 5 parts of high temperature resista...

Embodiment 3

[0089] A preparation method of high-temperature heat-shrinkable silicone rubber and EVA rubber-plastic blended closed-cell molded high-temperature secondary foaming material:

[0090] (1) EVA refining with internal mixer:

[0091] According to the proportion by weight, put 100 parts of EVA and 0.2 parts of stearic acid into the internal mixer, pressurize to 7 kg, knead for 15 minutes, and discharge when the temperature reaches 110 ° C ± 5 ° C;

[0092] (2) Open mill EVA open refining:

[0093] Put the plain rubber into the open mill, control the temperature at 90°C ± 5°C, turn over the 5mm material for 180 seconds, and cut it with a thickness of 2mm into the corresponding weight for temporary storage.

[0094] (3) Internal mixer mixing:

[0095] a. According to the formula weight parts, silicone rubber, 80 parts of EVA obtained in step (2), 5 parts of reinforcing agent, 20 parts of auxiliary reinforcing agent, 5 parts of cell stabilizer, 10 parts of high temperature resistan...

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Abstract

The invention relates to a foaming material, and provides a high-temperatureresistant heat shrinkage silicon rubber and EVA rubber plastic blending closed hole molding pressing high-temperature secondary foaming material and a preparation method thereof. Through blending, a proper recipe and process are matched; crosslinking foaming is performed to obtain a secondary foaming material with smallerdensity, lighter weight, higher softness and small heat shrinkage rate during high-temperature resistance. The problems of easy foaming and great high-temperature-resistant heat shrinkage rate duringthe existing silicon rubber and EVA rubber plastic blending high-temperature molding pressing closed hole foaming are solved.

Description

technical field [0001] The invention relates to a foaming material, in particular to a high-temperature thermal-shrinkage-resistant silicon rubber and EVA rubber-plastic blended closed-cell molded high-temperature secondary foaming material and a preparation method thereof. Background technique [0002] Patent No. ZL201310193119.0 "VMQ Silicone Rubber / EVA Closed Cell Foaming Material and Its Preparation Method" describes a material blended with once-foamed silicone rubber and EVA rubber and plastic, which reduces the density of vulcanized silicone rubber, but The bubble ratio is small, and the heat shrinkage rate of high temperature resistance is relatively large. Silicone rubber foam material has excellent low-temperature flexibility, moisture resistance, weather resistance and electrical insulation, so it is widely used in aerospace, automotive electronics, instrumentation and other fields, as heat insulation materials, shockproof materials, sound-absorbing materials, insu...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L23/08C08K13/02C08K3/36C08K3/22C08K5/09C08K5/14C08J9/10B29C44/08B29C44/60B29C69/02
Inventor 侯汝红陈奕汲
Owner YIBAO FUJIAN POLYMER MATERIALS
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