A kind of cross-linked polypropylene microporous foam material and its production method

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...

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 structure, and the elastic recovery is small, so it cannot adapt to the requirements of relatively high resilience performance. high field, thereby providing a cross-linked polypropylene microcellular foam material and a production method thereof

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