A kind of preparation process of foamed product and foamed product

A preparation process and a technology for foaming products, applied in the field of polymer material processing, can solve the problems of destroying the internal structure of the elastomer, blurring the surface three-dimensional structure, weak stability, etc., achieving excellent performance, colorless and odorless environment, foaming The effect of large magnification

Active Publication Date: 2022-07-26
SHINCELL NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is to overcome the low foaming ratio of thermoplastic elastomers such as thermoplastic polyurethane, thermoplastic polyester and thermoplastic nylon elastomer in the prior art when preparing surface three-dimensional structure foamed products, and traditional methods will destroy The internal structure of this type of elastomer may cause defects in the surface three-dimensional structure and poor stability, thus providing a process for preparing foamed products with a surface three-dimensional structure by one-step molding

Method used

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  • A kind of preparation process of foamed product and foamed product
  • A kind of preparation process of foamed product and foamed product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The present embodiment provides a preparation method of a foamed product, specifically a sports shoe midsole with a pattern on the surface, comprising the following steps:

[0034] (1) According to the outer dimension of the midsole of the sports shoes to be prepared, use the breathable steel to process and manufacture the mould with the same inner cavity outer dimension and after the mirror image conversion of the surface pattern;

[0035] (2) Choose the hardness as 85A, the melting point as 165℃, and the density as 1.15g / cm 3 The TPU resin was used as the material, and the solid foam embryo was prepared by the injection molding method. The injection temperature was 200°C, the mold temperature was 80°C, and the injection speed was 20cm. 3 / s.

[0036] (3) Put the solid foamed embryo into the mold, and under the condition of 160°C and 15MPa, the supercritical fluid is introduced for immersion for 150min, wherein the volume ratio of carbon dioxide and nitrogen is 10Mpa,...

Embodiment 2

[0038] The present embodiment provides a preparation method of a foamed product, specifically a sports shoe midsole with a pattern on the surface, comprising the following steps:

[0039] (1) According to the outer dimension of the midsole of the sports shoes to be prepared, use the breathable steel to process and manufacture the mould with the same inner cavity outer dimension and after the mirror image conversion of the surface pattern;

[0040] (2) Select the hardness as 98A, the melting point as 160°C, and the density as 1.07g / cm 3The TPEE resin was used as the material, and the solid foamed embryo was prepared by the injection molding method. The injection temperature was 205°C, the mold temperature was 90°C, and the injection speed was 30cm. 3 / s.

[0041] (3) Put the solid foamed embryo into the mold, and immerse it in supercritical fluid for 20 minutes at 155 ° C and 25 MPa, wherein the volume ratio of carbon dioxide and nitrogen is 4:1, and then release the pressure ...

Embodiment 3

[0043] The present embodiment provides a preparation method of a foamed product, specifically a sports shoe midsole with a pattern on the surface, comprising the following steps:

[0044] (1) According to the outer dimension of the midsole of the sports shoes to be prepared, use the breathable steel to process and manufacture the mould with the same inner cavity outer dimension and after the mirror image conversion of the surface pattern;

[0045] (2) Select the hardness as 94A, the melting point as 170°C, and the density as 1.02g / cm 3 The TPAE resin was used as the material, and the solid foamed embryo was prepared by the injection molding method. The injection temperature was 210°C, the mold temperature was 70°C, and the injection speed was 30cm. 3 / s;

[0046] (3) Put the solid foamed embryo into the mold, and feed supercritical N under the condition of 167°C and 40MPa. 2 After immersion for 80min, the pressure was released at a rate of 1000MPa / s. The solid foamed embryo ...

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Abstract

The invention discloses a preparation process of a foamed product, which comprises the following steps: firstly preparing a solid foaming embryo; then putting the solid foaming embryo into a closed space, pouring it into a supercritical fluid to impregnate it, and then releasing the pressure to make it Foamed to completely fit with the inner side of the closed space to obtain a foamed product. The invention also discloses the foamed product prepared by the above process. In the present invention, the solid foamed embryo is foamed in the mold. When it expands to contact the inner wall of the mold, the expansion is limited, and thermal pressure is formed between the solid foamed embryo and the inner wall of the mold, so that the surface of the solid foamed embryo forms a mold. The shape of the inner wall, according to the characteristics of thermoplastic elastomers such as thermoplastic polyurethane, thermoplastic polyester and thermoplastic nylon elastomer, avoids the shrinkage of the foam material caused by secondary molding, resulting in an increase in density and a decrease in elastic performance; the use of molds to control the structure of the surface of the foam material , Improve the dimensional accuracy, the surface structure of the foamed products is fine, and there will be no problems of blurring and poor stability.

Description

technical field [0001] The invention relates to the field of polymer material processing, in particular to a preparation process of a foamed product and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane (TPU), thermoplastic polyester (TPEE), thermoplastic nylon elastomer (TPAE) and other high-performance thermoplastic elastomers, the main chain of which is composed of soft segments with a glass transition temperature lower than room temperature and a glass transition temperature higher than room temperature. hard segment blocks. Due to the strong polarity of the hard segment and the strong mutual attraction, the hard segment and the soft segment have a tendency to spontaneously separate thermodynamically. Phase separation structure. The crystalline structure and strong hydrogen bonding force formed in the hard segment act as a physical cross-linking point, restricting the movement of molecular chains, while the soft segment contributes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/12C08L75/04C08L67/00C08L77/00
CPCC08J9/122C08J2203/06C08J2203/08C08J2205/052C08J2375/04C08J2367/00C08J2377/00
Inventor 姜修磊李期筠余加保葛鑫奇
Owner SHINCELL NEW MATERIAL CO LTD
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