Cross-linked polypropylene microcellular foam material and production method thereof

A technology of microcellular foaming material and cross-linked polypropylene, applied in the direction of coating, can solve the problems of small elastic recovery and inability to adapt to the resilience performance, and achieve the effect of good resilience and fine hand feeling

Active Publication Date: 2014-01-08
浙江新恒泰新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing non-crosslinked polypropylene foaming material is easy to produce irreversible plastic deformation when stressed due to its internal non-network structu

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1:

[0027] A cross-linked polypropylene microcellular foam material, comprising the following components: 100 parts by weight of polypropylene resin, 0.5 part by weight of radiation sensitizer, and 0.1 part by weight of antioxidant.

[0028] The polypropylene resin is long-chain branched polypropylene with a melt index of 1.5g / 10min, the radiation sensitizer is trimethylolpropane triacrylate, and the antioxidant is tris(3,5-di-tert-butyl- 4-hydroxybenzyl) isocyanurate.

[0029] The production method adopted by the above-mentioned cross-linked polypropylene microcellular foamed material comprises the following steps:

[0030] a): mixing of raw materials: the polypropylene resin, the radiation sensitizer and the antioxidant are melt-mixed through a twin-screw extruder, and extruded to obtain a polypropylene foam substrate;

[0031] b):CO 2 Gas-impregnated substrate: put the polypropylene foamed substrate produced in step a) into a high-pressure foaming mold, t...

Example Embodiment

[0036] Embodiment 2:

[0037] A cross-linked polypropylene microcellular foam material, comprising the following components: 100 parts by weight of polypropylene resin, 1 part by weight of radiation sensitizer, and 0.2 part by weight of antioxidant.

[0038] The polypropylene resin is long-chain branched polypropylene with a melt index of 1.7g / 10min, the radiation sensitizer is neopentyl glycol dimethacrylate, and the antioxidant is tetra(3,5-di-tert-butyl) - 4-Hydroxy) phenylpropionate pentaerythritol.

[0039]The production method adopted by the above-mentioned cross-linked polypropylene microcellular foamed material comprises the following steps:

[0040] a): mixing of raw materials: the polypropylene resin, the radiation sensitizer and the antioxidant are melt-mixed through a twin-screw extruder, and extruded to obtain a polypropylene foam substrate;

[0041] b):CO 2 Gas-impregnated substrate: put the polypropylene foamed substrate produced in step a) into a high-pressu...

Example Embodiment

[0046] Embodiment three:

[0047] A cross-linked polypropylene microcellular foam material, comprising the following components: 100 parts by weight of polypropylene resin, 1.5 parts by weight of radiation sensitizer, and 0.5 part by weight of antioxidant.

[0048] The polypropylene resin is long-chain branched polypropylene with a melt index of 2g / 10min, the radiation sensitizer is 1,6-hexanediol diacrylate, and the antioxidant is tris(2,4-di-tert-butyl) phenyl) phosphite.

[0049] The production method adopted by the above-mentioned cross-linked polypropylene microcellular foamed material comprises the following steps:

[0050] a): mixing of raw materials: the polypropylene resin, the radiation sensitizer and the antioxidant are melt-mixed through a twin-screw extruder, and extruded to obtain a polypropylene foam substrate;

[0051] b):CO 2 Gas-impregnated substrate: put the polypropylene foamed substrate produced in step a) into a high-pressure foaming mold, the foaming ...

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Abstract

The invention relates to a cross-linked polypropylene microcellular foam material. The cross-linked polypropylene microcellular foam material comprises the following raw materials in parts by weight: 99-100 parts of polypropylene resin, 0.1-2 parts of irradiation sensitizer and 0.1-3 parts of antioxidant and is produced through the following steps: mixing the raw materials; dipping a substrate with CO2 gas; foaming the substrate; performing irradiation treatment on the foam material; performing high-temperature annealing; detecting the foam material. The cross-linked polypropylene microcellular foam material has the advantages that the polypropylene resin, the irradiation sensitizer and the antioxidant are subjected to the steps of mixing the raw materials, dipping the substrate with CO2 gas, foaming the substrate, performing irradiation treatment on the foam material, performing high-temperature annealing and detecting the foam material in sequence to obtain a high-resilience polypropylene microcellular foam product with small cell size and high cell density; the cross-linked polypropylene microcellular foam material prepared by the method has the characteristics of good resilience, fine handfeel, no toxicity and no smell, and can be widely applied to the fields with high requirements on the resilience and the sanitation level of the foam material.

Description

technical field [0001] The invention relates to a cross-linked polypropylene microporous foam material and a production method thereof. Background technique [0002] Polypropylene microporous foam material refers to the pore size less than 100μm and the pore density greater than 1.0×10 6 piece / cm 3 The porous polypropylene foam material, a large number of micron-sized cells in the material endows the polypropylene foam material with excellent properties such as light weight, high strength, low thermal conductivity, and high diffuse reflectivity, so the polypropylene microcellular foam material has a wide range of applications. field of application. [0003] Using supercritical CO 2 As a foaming agent, the solid-state foaming technology makes polypropylene foam in the deformable region lower than its melting point, which is an effective means to form a large number of tiny cells in the polypropylene matrix. By using supercritical CO 2 The polypropylene microcellular foam...

Claims

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Application Information

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IPC IPC(8): C08F255/02C08L51/06C08K5/134C08K5/526C08K5/3492C08J9/12C08J9/36C08J3/28C08J3/24
Inventor 陈春平
Owner 浙江新恒泰新材料股份有限公司
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