Composite resin particle and its manufacturing method

Abstract

A project of the invention provides composite resin particles and a manufacturing method thereof. Through the composite resin particles, a foamed particle molded article which has good internal fusion, compression rigidity and flexibility resistance, and which can be protected from being broken due to deformation is obtained. The foamed particle molded article has less styrene monomer left, has good foaming ability during foaming, and has excellent forming property during forming. The project is solved by providing composite resin particles (1) taking a composite resin which is made by impregnating a polystyrene monomer in an ethylene resin as a basic resin and a manufacturing method of the composite resin particles (1). The composite resin comprises 100-900 parts by mass of a structural unit deriving from a styrene monomer based on 100 parts by mass of the ethylene resin. The content of the styrene monomer existing as a monomer in the composite resin particles is 0-500 ppm by mass. The ratio WXY of a xylene insoluble component in the composite resin particles (1) is 0-40% by mass. During manufacturing of the composite resin particles, two polymerization initiators with different 10 h half-life period temperatures are adopted.

Description

technical field [0001] The present invention relates to composite resin particles using, as a base resin, a composite resin obtained by impregnating and polymerizing a styrene-based monomer in a vinyl-based resin, and a method for producing the same. Background technique [0002] Expanded particle moldings are used in a wide range of applications such as packaging materials, building materials, and vehicle parts, due to their excellent characteristics in terms of cushioning, light weight, vibration resistance, sound insulation, and heat insulation. The expanded particle molded body is obtained by fusing a plurality of expanded particles with each other in a molding die. In addition, the foamed particles are foamed by heating or the like to foam the resin particles in which organic physical foaming agents such as propane, butane, pentane, etc., or inorganic physical foaming agents such as carbon dioxide, nitrogen, and air are impregnated into the resin particles. get. As th...

AI Technical Summary

Problems solved by technology

However, in recent years, as the size of the panel has increased, the weight of the packaging has also increased, and when a foamed particle molded product containing propylene resin is used as a packaging container, there has been a problem of increased deflection in the packaged state.

If the deflection during packaging is large, the both ends of the packaged container may fall off when supported by a transfer machine, etc., and the liquid crystal panel may be damaged due to the deflection.

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