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High-magnification thermoplastic polyurethane microporous foamed plate and production method thereof

A thermoplastic polyurethane and microcellular foaming technology, which is applied in the field of high-rate thermoplastic polyurethane microcellular foamed sheets, can solve the problems of low foaming ratio and achieve the effects of large foaming ratio, shortened foaming time, and shortened diffusion distance

Inactive Publication Date: 2016-11-23
ZHEJIANG XINHENGTAI ADVANCED MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a high-magnification thermoplastic polyurethane microcellular foamed sheet and its production method, so as to solve the defect of low foaming ratio of existing TPU bead molding products

Method used

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  • High-magnification thermoplastic polyurethane microporous foamed plate and production method thereof
  • High-magnification thermoplastic polyurethane microporous foamed plate and production method thereof
  • High-magnification thermoplastic polyurethane microporous foamed plate and production method thereof

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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a high-magnification thermoplastic polyurethane microcellular foamed sheet includes the following components: 100 parts by weight of TPU, the molecular weight of the TPU is 60,000, the hardness is shore A 75, and the TPU is polyester TPU particles.

[0030] A method for producing a high-magnification thermoplastic polyurethane microcellular foamed sheet, comprising the following steps:

[0031] a) After dehumidifying and drying the TPU, add it to the extruder, then shape it through a hanger-type die, cool it, cut it to length, and cut it into a TPU solid plate with a width of 150mm, a length of 400mm, and a thickness of 10mm;

[0032] b) Put the TPU solid plate obtained in step a) into a high-pressure foaming mold, and the volume ratio of the mold cavity in the mold to the TPU solid plate is 3:1, the mold is clamped by hydraulic pressure, and the mold is protected by a sealing ring. Force sealing, the mold is heated to 140°C through heat tran...

Embodiment 2

[0035] Such as figure 2 As described, a high-magnification thermoplastic polyurethane microcellular foamed sheet includes the following components: 95 parts by weight of TPU, 5 parts by weight of polydimethylsiloxane, the molecular weight of TPU is 65,000, and the hardness is shore A 80 , TPU is polyether TPU particles, and polydimethylsiloxane is double-terminated amino polydimethylsiloxane.

[0036] A method for producing a high-magnification thermoplastic polyurethane microcellular foamed sheet, comprising the following steps:

[0037] a) Mix TPU and polydimethylsiloxane, dehumidify and dry it, add it to the extruder, then shape it through a hanger-type die, cool it, cut it to length, and cut it into a solid TPU with a width of 150mm, a length of 400mm, and a thickness of 10mm plate;

[0038] b) Put the TPU solid plate obtained in step a) into a high-pressure foaming mold, and the volume ratio of the mold cavity in the mold to the TPU solid plate is 2:1, the mold is clampe...

Embodiment 3

[0041] Such as image 3 As shown, a high-magnification thermoplastic polyurethane microcellular foamed board includes the following components: 100 parts by weight of TPU, the molecular weight of the TPU is 80,000, the hardness is shore A 85, and the TPU is polyether TPU particles.

[0042] A method for producing a high-magnification thermoplastic polyurethane microcellular foamed sheet, comprising the following steps:

[0043] a) After dehumidifying and drying the TPU, add it to the extruder, and then shape it through a hanger-type die, cool it, cut it to length, and cut it into a TPU solid plate with a width of 500mm, a length of 1500mm, and a thickness of 20mm;

[0044] b) Put the TPU solid plate obtained in step a) into a high-pressure foaming mold, and the volume ratio of the mold cavity in the mold to the TPU solid plate is 3:2, the mold is clamped by hydraulic pressure, and the mold is protected by a sealing ring. Force sealing, the mold is heated to 155°C through heat...

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Abstract

The invention relates to a high-magnification thermoplastic polyurethane microporous foamed plate which is prepared from the following components in parts by weight: 70-100 parts of TPU (thermoplastic polyurethane) and 0-30 parts of polydimethylsiloxane. The high-magnification thermoplastic polyurethane microporous foamed plate has the advantages that, as a supercutical fluid has relative high solubility in the polydimethylsiloxane and the polydimethylsiloxane has relatively low interfacial tension, a little polydimethylsiloxane mixed in the TPU greatly accelerates the diffusion velocity of the supercutical fluid in the TPU; a diffusion equilibrium time of the supercutical fluid in the TPU is shortened; the volume of a die cavity is slightly more than that of a TPU plate; moreover, a die made of a breathable metal material is laid on a surface of a die, so that the supercutical fluid can synchronously diffuse to enter the TPU plate through the upper surface and the lower surface of the TPU plate; in comparison with that the supercutical fluid can diffuse to enter the TPU plate through the upper surface only, a diffusion distance is shortened; the diffusion equilibrium time is shortened; the production efficiency is improved; in addition, the invention also provides a production method of the high-magnification thermoplastic polyurethane microporous foamed plate.

Description

technical field [0001] The invention relates to a high-magnification thermoplastic polyurethane microporous foam board and a production method thereof. Background technique [0002] The soft elastic polymer foam made by foaming technology has excellent shock absorption and buffering, heat insulation, noise reduction and sound absorption, dustproof and waterproof performance, and is widely used in shoe materials, furniture, electronic equipment, vehicles, sports equipment, protective It is widely used in packaging and other fields. The porous structure and the chemically cross-linked network structure formed inside are the basic characteristics of soft elastic polymer foams, such as cross-linked EVA foam materials, various rubber foam materials, PVC foam materials, etc. These soft elastic materials formed by chemical cross-linking and foaming have complicated manufacturing process, high pollution, poisonous and peculiar smell, and are difficult to recycle and reuse, causing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08J9/14C08L75/06C08L75/08C08L75/04C08L83/08
CPCC08J9/122C08J9/141C08L75/08C08J2375/04C08J2375/08C08J2203/182C08J2203/14C08J2205/044C08J2203/06C08J2203/08C08J2475/08C08J2483/08C08L83/08C08J9/12C08J9/14C08L75/06C08J2375/12C08J2483/04C08J9/0061C08J9/18C08J2201/032
Inventor 姜修磊
Owner ZHEJIANG XINHENGTAI ADVANCED MATERIAL
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