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Technology for forming polyurethane rubber foam plastic

A technology of polyurethane rubber and foam plastics, which is applied in the field of polyurethane rubber foam plastic molding, and can solve the problems of irreversibility, high scrap rate, inability to process and utilize, etc.

Inactive Publication Date: 2010-06-23
许建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the water-based polyurethane material cannot be recovered after being foamed, it has the characteristics of one-time molding and cannot be reprocessed and utilized after molding.
Therefore, it is easy to cause a high scrap rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0007] This specific embodiment adopts the following technical scheme: first put waste water-based polyurethane into a pulverizer, and pulverize it into waste materials whose volume cannot exceed 1 cubic centimeter; It should be controlled in 3 stages, the first stage is the discharge door with a temperature of 140-150 degrees, the second stage is the most critical place, the temperature is 160 degrees, and the temperature of the material is controlled at the same time, because it is a waste material, so there will be a big Error, the moisture should be controlled within 5%, and the temperature of the third stage should be controlled at about 130 degrees, because it is the suction port, the temperature should not be too high, as long as the material is not allowed to melt; after the material comes out of the first stage, the first stage The material after it comes out will have a lot of moisture, that is, the effect of heating to more than 100 degrees, and then put the material...

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PUM

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Abstract

The invention relates to a technology for forming polyurethane rubber foam plastic, comprising the following steps: putting waste waterborn polyurethane in a grinder to grind the waste waterborn polyurethane into waste material with the volume of less than 1 cubic centimeter, putting the waste material in a plastic granulator, immediately putting plastic granules into water to cool the plastic granules for 50 seconds right after the plastic granules come out of the plastic granulator, taking the plastic granules out of water, putting the plastic granules in the grinder to fine grind the plastic granules to about the size of rice of less than about 1 cubic centimeter; and putting the ground plastic granules in an injecting and molding machine to mold the ground plastic granules into the finished product. The waste materials of semi-hard polyurethane rubber and hard foam plastic are processed with the special technology and then formed in one time into novel material.

Description

Technical field: [0001] The invention relates to a polyurethane rubber foam molding technology. Background technique: [0002] Semi-rigid and rigid foams have outstanding wear resistance properties among all current elastomeric materials. Polyurethane rubber has the best wear resistance, and the comparison of wear test results shows that the wear resistance can be 3-10 times higher than that of ordinary natural rubber, and its mechanical properties such as tensile strength, elongation, and tear strength are much better than those of ordinary natural rubber. Ordinary rubber material, good oil resistance, ozone resistance, aging resistance, radiation resistance, low temperature resistance, normal use temperature range is -20-100c. However, since the water-based polyurethane material cannot be recovered after being foamed, it has the characteristics of one-time molding and cannot be reprocessed and utilized after molding. Therefore, it is easy to cause a high reject rate. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00B29B9/06B29C47/92B29C47/60B29C48/04B29C48/92
CPCB29C48/92B29C2948/92704B29C48/04B29C48/9185B29C2948/92561B29C2948/92895B29C2948/92923
Inventor 许建
Owner 许建