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A kind of thermoplastic elastomer physical foaming coil and its semi-continuous preparation method

A thermoplastic elastomer and thermoplastic elastic technology, which is applied in the field of thermoplastic elastomer physical foaming coil and its semi-continuous preparation, can solve the limitation of large-scale preparation of TPU foaming film coil, TPU foaming process is unstable, and affects TPU Foaming behavior and other issues, to achieve the effect of large-scale continuous production, suppression of desorption phenomenon, low density

Active Publication Date: 2022-02-11
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are reports in the existing literature that the interfacial adhesion strength between the barrier film and the TPU film will affect the foaming behavior of TPU, resulting in different expansion behavior and cell morphology. Therefore, the technology of using gas barrier film to improve the foaming of TPU film is in Difficulties in large-scale implementation
At the same time, the price of the barrier film is high, and the use of such raw materials will also lead to higher product processing costs
In addition, the TPU film impregnated with high-pressure fluid foaming agent is prone to desorption when it is placed at room temperature and pressure for a long time. The escape of a large amount of foaming agent leads to unstable foaming process of TPU, which also limits the large-scale production of TPU foamed film coils. preparation

Method used

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  • A kind of thermoplastic elastomer physical foaming coil and its semi-continuous preparation method
  • A kind of thermoplastic elastomer physical foaming coil and its semi-continuous preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Embodiments of the semi-continuous preparation method of the thermoplastic elastomer physical foaming web of the present invention include the following steps:

[0064] (1) 100 parts of the TPU particles (Shaw's hardness of 80A), 5 parts of talc powder and 0.5 parts of antioxidants were sequentially dried, premixed, twin-screw continuous extrusion, calendering and retracted, and the thickness was 1 mm before Thermoplastic elastomeric coil;

[0065] (2) Place the step (1) before the previously driven plastic elastomer web filled with CO 2 In the high pressure container of the fluid, impregnate the impregnated thermoplastic elastomeric web having a high pressure fluid content of 9%, and then remove the impregnated thermoplastic elastomer web into the cooling chamber with liquid nitrogen by fast refrigeration lock gas treatment, at which time the temperature in the cooling cavity is -60 ° C, then low temperature at -20 ° C for 1 h, the temperature of the high pressure fluid in...

Embodiment 2

[0069] Embodiments of the semi-continuous preparation method of the thermoplastic elastomer physical foaming web of the present invention include the following steps:

[0070] (1) 100 parts of TPU particles (Shaw's hardness of 80A), 10 parts of EVA particles and 0.5 parts of antioxidants were sequentially dry, premixed, twin-screw continuous extrusion, calendering, and retracted, the thickness was 0.3mm. Formerly driven thermoplastic elastomerical coil;

[0071] (2) Place the step (1) before the previously driven plastic elastomer web filled with CO 2 In the high pressure container of the fluid, impregnate the impregnated thermoplastic elastomeric web having a high pressure fluid content of 9%, and then remove the impregnated thermoplastic elastomer web into the cooling chamber with liquid nitrogen by fast refrigeration lock gas treatment, at which time the temperature in the cooling cavity is -60 ° C, then low temperature at -20 ° C for 6 h, low temperature storage for 6 h after ...

Embodiment 3

[0075] Embodiments of the semi-continuous preparation method of the thermoplastic elastomer physical foaming web of the present invention include the following steps:

[0076] (1) 100 parts of TPEE particles (Shaw's hardness 85a), 0.5 parts of antioxidants are sequentially dried, premixed, twin-screw continuous extrusion, calendering, and retaining, the thickness is 0.5mm before driving a plastic elastic body roll material;

[0077] (2) Place the step (1) before the previously driven plastic elastomer web filled with CO 2 In the high pressure container of the fluid, impregnate the impregnated thermoplastic elastomeric web having a high pressure fluid content of 8.5%, and then remove the impregnated thermoplastic elastomer web into the cooling chamber with liquid nitrogen to perform a fast refrigeration lock gas treatment, at which time the temperature in the cooling cavity is -60 ° C, then at -20 ° C low temperature storage 24 h, a low temperature storage 24 h then impregnated the...

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Abstract

The invention discloses a thermoplastic elastomer physically foamed roll material and a semi-continuous preparation method thereof, belonging to the field of thermoplastic elastomer foamed leather. In the semi-continuous preparation method of the thermoplastic elastomer physical foaming coil described in the present invention, by controlling the solubility content of the high-pressure fluid in the thermoplastic elastomer coil, and then performing rapid freezing and air-locking treatment on the material at a specific temperature, the high pressure is suppressed. The desorption phenomenon of the fluid, the obtained impregnated coil can be stored at low temperature for a long time or carried out long-distance transportation, and at the same time, it can perform continuous heating and foaming stably, and it will not happen like the existing technology in the process of storage or foaming Obvious high-pressure fluid escapes, and the implementability is significantly improved; the method can realize large-scale continuous production, and is safe and environmentally friendly. The invention also discloses the thermoplastic elastomer physical foaming coil prepared by the preparation method, the thickness of the product is 0.1-3mm, and the density is 0.1-0.6g / cm 3 , the size of the foaming cells is 1-200 μm, and the Shore hardness is 20-60C.

Description

Technical field [0001] The present invention relates to the field of thermoplastic elastomers, and more particularly to a thermoplastic elastomer physical foaming web and a semi-continuous preparation method. Background technique [0002] General polymer foam (such as PVC leather, PU leather, etc.) involves a large number of chlorides, sulfides, solvents, plasticizers during processing, existing product VOC release problems, in automobile sofa, interior Revolution and other fields are limited. [0003] Thermoplastic elastomer such as thermoplastic polyurethane (TPU), polyester elastomer (TPAE), nylon elastomer (TPAE) is a class of materials compared to conventional polymers, and it has excellent wear resistance, scratching resistance Differential, mechanical strength, gas permeability, water resistance, gas resistance, and melt recovery can be carried out. Typically, TPU foam films prepared using TPU resins are a human leather material having a wide application prospect. [0004]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/12C08L75/04C08K3/34C08L23/08C08L67/00C08L29/04
CPCC08J9/122C08J9/0066C08J9/0061C08J2375/04C08J2423/08C08J2367/00C08J2429/04B29C44/00C08J2201/03C08J2203/06C08J2205/044C08J2300/22C08J2300/26
Inventor 翟文涛
Owner SUN YAT SEN UNIV
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