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Extruded and foamed thermoplastic polyurethane elastomer particle and preparation method thereof

A technology of thermoplastic polyurethane and thermoplastic polyester, applied in the field of foaming materials

Active Publication Date: 2018-07-03
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] One of the purposes of the present invention is to overcome the shortcomings of the existing foamed TPU particles and provide an extruded foamed thermoplastic polyurethane elastomer particle that is environmentally friendly, low shrinkage, good dimensional stability, plump appearance, and excellent mechanical properties

Method used

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  • Extruded and foamed thermoplastic polyurethane elastomer particle and preparation method thereof
  • Extruded and foamed thermoplastic polyurethane elastomer particle and preparation method thereof
  • Extruded and foamed thermoplastic polyurethane elastomer particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] (1) According to mass percentage, 90% of thermoplastic polyether polyurethane (8190RV), 9.4% of polybutylene terephthalate (1200-211L), 0.5% of compatibilizer EPDM-G-MAH and 0.1 % of talcum powder mixed evenly. the mixed composition in the Melt blending is carried out in a co-rotating twin-screw extruder, and the blending temperature is 175-235°C. After underwater granulation and drying, thermoplastic polyurethane blended alloy particles are obtained;

[0093] (2) Put the obtained thermoplastic polyurethane blended gold particles into foaming extrusion equipment, and the material is melted and plasticized in the extrusion equipment to obtain a thermoplastic polyurethane blended gold melt, and the melting temperature is 160-200° C.;

[0094] (3) supercritical carbon dioxide is injected into the blended alloy melt, the pressure of supercritical carbon dioxide is 10MPa, and the consumption is 5% of the blended alloy melt quality;

[0095] (4) Expanded particles are obt...

Embodiment 2

[0098] (1) According to mass percentage, 82.8% of thermoplastic polyether polyurethane (8190RV), 15% of polybutylene terephthalate (1100-211MD), 2% of compatibilizer POE-G-MAH and 0.2 % of nanometer calcium carbonate (NPCC-201, D50=10nm) is mixed evenly. the mixed composition in the Melt blending is carried out in a co-rotating twin-screw extruder, and the blending temperature is 175-235°C. After underwater granulation and drying, thermoplastic polyurethane blended alloy particles are obtained;

[0099] (2) Put the obtained thermoplastic polyurethane blended gold particles into foaming extrusion equipment, and the material is melted and plasticized in the extrusion equipment to obtain a thermoplastic polyurethane blended gold melt, and the melting temperature is 170-220° C.;

[0100] (3) supercritical carbon dioxide is injected into the blended alloy melt, the pressure of supercritical carbon dioxide is 15MPa, and the consumption is 10% of the blended alloy melt quality;

...

Embodiment 3

[0104] (1) According to the mass percentage, 87.5% of thermoplastic polyether polyurethane (8185RV), 2% of thermoplastic polyester elastomer ( 7246), 10% compatibilizer HDPE-G-MAH and 0.5% talcum powder are mixed evenly. the mixed composition in the The melt blending is carried out in a co-rotating twin-screw extruder, and the blending temperature is 175-230°C. After underwater granulation and drying, thermoplastic polyurethane blended alloy particles are obtained;

[0105] (2) Put the obtained thermoplastic polyurethane blended gold particles into foaming extrusion equipment, and the material is melted and plasticized in the extrusion equipment to obtain a thermoplastic polyurethane blended gold melt, and the melting temperature is 160-200° C.;

[0106] (3) supercritical carbon dioxide is injected into the blended alloy melt, the pressure of supercritical carbon dioxide is 25MPa, and the consumption is 15% of the blended alloy melt quality;

[0107] (4) Expanded particle...

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Abstract

The invention relates to an extruded and foamed thermoplastic polyurethane elastomer particle and a preparation method thereof. The particle contains the following components in percentage by mass: (A) 65%-90% of a thermoplastic polyurethane elastomer, (B) 2%-30% of a thermoplastic resin polymer, (C) 0.5%-15% of a compatilizer and (D) 0.1%-5% of a foaming nucleating agent. The preparation method of a TPU formed particle comprises the following steps: uniformly mixing the thermoplastic polyurethane elastomer, the thermoplastic resin polymer, the compatilizer and the foaming nucleating agent, putting the mixture into melt extrusion equipment, and carrying out granulation, so as to obtain a blending alloy particle; and putting the blending alloy particle into foaming extrusion equipment, carrying out melting plastification so as to obtain a melt, dissolving supercritical carbon dioxide into the melt, foaming by virtue of a mouth mold, and carrying out underwater dicing, so as to obtain the formed particle. The prepared thermoplastic polyurethane foamed particle is stable in size and basically does not shrink, the surface is bright and plumy, and the diameters of foamed holes are uniform.

Description

technical field [0001] The invention relates to extruded foamed thermoplastic polyurethane elastomer particles and a preparation method thereof, belonging to the field of foamed materials. Background technique [0002] Foamed materials have low density, high specific strength, heat and sound insulation and cushioning properties, and are widely used in packaging, industry, agriculture, transportation, military, aerospace, and daily and civilian products. Commonly used foaming materials include polystyrene (PS) foam, polyethylene (PE) foam, polypropylene (PP) foam, and polyurethane (PU) soft and rigid foams. Or chemically fill a large number of air bubbles inside the plastic. [0003] Thermoplastic polyurethane (TPU) has the advantages of good physical and mechanical properties, low temperature flexibility, hydrolysis resistance, aging resistance, environmental friendliness, and recyclability. In addition to the excellent performance of the material, it also has excellent re...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08L75/06C08L67/02C08L51/04C08L51/06C08L67/00C08L77/02C08L77/06C08L23/06C08L23/14C08K3/34C08K3/26C08J9/12C08J9/16
CPCC08J9/122C08J9/16C08J2203/06C08J2375/06C08J2375/08C08J2423/06C08J2423/14C08J2451/06C08J2467/00C08J2467/02C08J2477/06C08K2201/003C08K2201/011C08L75/06C08L75/08C08L2203/14C08L2205/03C08L2205/24C08L2207/04C08L2207/062C08L67/02C08L51/04C08K3/34C08L51/003C08L51/06C08K2003/265C08L67/00C08K3/346C08L77/02C08L77/06C08L23/06C08L23/14C08L25/06
Inventor 付小亮杨永柱黄岐善陈玉兵翟志斌咸鹤武
Owner WANHUA CHEM GRP CO LTD
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