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A thermoplastic polyurethane foam product with different gradient densities and its molding process

A technology of thermoplastic polyurethane and foamed products, which is applied in the field of material processing, can solve the problem of single function of foam materials, and achieve the effects of environmentally friendly molding methods, pollution-free molding methods, and simple molding methods

Active Publication Date: 2022-04-08
NINGBO GMF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a thermoplastic polyurethane foam material with different gradient densities and its molding process, so as to solve the problem of single function of the foam material in the prior art

Method used

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  • A thermoplastic polyurethane foam product with different gradient densities and its molding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Put 5703TPU into the autoclave and feed CO 2 , the pressure of the high-pressure reactor is 12Mpa, the temperature is 40°C, and the pressure is maintained for 3 hours. After the pressure is released, it is quickly put into the foaming equipment, heated and foamed at 110°C for 4 minutes, and the density is 0.38g / cm3. 3 foamed particles;

[0027] Put 5703TPU into the autoclave and feed CO 2 , the pressure of the high-pressure reactor is 15Mpa, the temperature is 45°C, and the pressure is maintained for 3 hours. After the pressure is released, it is quickly put into the foaming equipment, heated and foamed at 115°C for 6 minutes, and the density is 0.33g / cm 3 foamed particles;

[0028] Put 5703TPU into the autoclave and feed CO 2 , the pressure of the high-pressure reactor is 20Mpa, the temperature is 45°C, and the pressure is maintained for 4 hours. After the pressure is released, it is quickly put into the foaming equipment, heated and foamed at 120°C for 8 minutes, a...

Embodiment 2

[0032] Put 5703TPU into the autoclave and feed CO 2, the pressure of the high-pressure reactor is 12Mpa, the temperature is 40°C, and the pressure is maintained for 3 hours. After the pressure is released, it is quickly put into the foaming equipment, heated and foamed at 110°C for 4 minutes, and the density is 0.38g / cm3. 3 foamed particles;

[0033] Put 5703TPU into the autoclave and feed CO 2 , the pressure of the high-pressure reactor is 15Mpa, the temperature is 45°C, and the pressure is maintained for 3.5 hours. After the pressure is released, it is quickly put into the foaming equipment, and heated and foamed at 115°C for 7 minutes to obtain a density of 0.31g / cm 3 foamed particles;

[0034] Put 5703TPU into the autoclave and feed CO 2 , the pressure of the high-pressure reactor is 20Mpa, the temperature is 45°C, and the pressure is maintained for 4 hours. After the pressure is released, it is quickly put into the foaming equipment, heated and foamed at 120°C for 8 mi...

Embodiment 3

[0037] Put 5703TPU into the autoclave and feed CO 2 , the pressure of the high-pressure reactor is 12Mpa, the temperature is 40°C, and the pressure is maintained for 3 hours. After the pressure is released, it is quickly put into the foaming equipment, heated and foamed at 110°C for 4 minutes, and the density is 0.38g / cm3. 3 foamed particles;

[0038] Put 5703TPU into the autoclave and feed CO 2 , the pressure of the high-pressure reactor is 14Mpa, the temperature is 45°C, and the pressure is maintained for 3 hours. After the pressure is released, it is quickly put into the foaming equipment, heated and foamed at 115°C for 5 minutes, and the density is 0.35g / cm 3 foamed particles;

[0039] Put 5703TPU into the autoclave and feed CO 2 , the pressure of the high-pressure reactor is 15Mpa, the temperature is 45°C, and the pressure is maintained for 3.5 hours. After the pressure is released, it is quickly put into the foaming equipment, and heated and foamed at 115°C for 7 minu...

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Abstract

The invention relates to a thermoplastic polyurethane foam product with different gradient densities and a molding process thereof, belonging to the field of material processing. The foamed product is composed of 3-10 layers of thermoplastic polyurethane foaming materials with different densities, wherein the density of the thermoplastic polyurethane foaming material of the highest density layer is different from the density of the thermoplastic polyurethane foaming material of the lowest density layer by 0.06-0.3g / cm 3 , the thermoplastic polyurethane foaming materials with different densities are made by supercritical carbon dioxide foaming.

Description

technical field [0001] The invention relates to a thermoplastic polyurethane foam product with different gradient densities and a molding process thereof, belonging to the field of material processing. Background technique [0002] Functional Gradient Materials (Functional Gradient Materials abbreviated as FGM) is to make the elements of the material (composition, structure, porosity, concentration) change continuously along the thickness direction from one side to the other during the manufacturing process, so that there is no obvious internal Interface, so that the properties and functions of the material are also a new material that changes continuously. Compared with composite materials, the composition of functionally graded materials changes gradually from one side to the other, and there is no specific interface, so that the properties of the material change smoothly, thus easing the stress between the surface layer and the bottom layer, resulting in better performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C44/04B29C44/34B29C44/60
CPCB29C44/0415B29C44/34B29C44/60
Inventor 秦柳俞淞腾高晗许袁
Owner NINGBO GMF TECH
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