Composite resin foamed particle, antistatic composite resin foamed particle and composite resin foamed particle molded body

A technology of composite resin and foamed particles, which is applied in the field of molded bodies, can solve the problems of reduced heat resistance of foamed particles, reduced fusion of foamed particles, plasticization of resin particles, etc., and achieves excellent antistatic performance and good antistatic Excellent performance and compatibility

Inactive Publication Date: 2018-03-09
JSP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the method of impregnating the antistatic agent while impregnating the volatile foaming agent, the resin particles may be excessively plasticized by the antistatic agent, and the h

Method used

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  • Composite resin foamed particle, antistatic composite resin foamed particle and composite resin foamed particle molded body
  • Composite resin foamed particle, antistatic composite resin foamed particle and composite resin foamed particle molded body
  • Composite resin foamed particle, antistatic composite resin foamed particle and composite resin foamed particle molded body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Hereinafter, expanded beads according to Examples will be described.

[0105] The expanded beads according to the examples use a composite resin obtained by impregnating and polymerizing a styrene-based monomer into a vinyl-based resin as a base resin. That is, the composite resin contains a styrene-based resin component obtained by polymerizing a vinyl-based resin component and a styrene-based monomer. Hereinafter, the manufacturing method of the expanded bead of this example is demonstrated. In addition, in this example, the obtained expanded beads were further subjected to in-mold molding to prepare a molded body.

[0106] (1) Preparation of nuclear particles

[0107] As vinyl resins, LLDPE (manufactured by Tosoh Corporation, trade name: Nipolon-Z HF 210K) polymerized by a metallocene polymerization catalyst, ethylene-vinyl acetate copolymer (manufactured by Asahi Kasei Chemical Co., Ltd., trade name) were prepared. Name: EF1531, the content of the vinyl acetate c...

Embodiment 2

[0154] In this example, the amount of LLDPE used in the preparation of the core particles was changed to 6 kg, the amount of EVA was changed to 4 kg, the foaming conditions during foaming (specifically, the CO in the container during foaming) 2 Pressure) was changed to the conditions shown in Table 2 described later, and expanded beads and molded bodies were prepared in the same manner as in Example 1.

Embodiment 3

[0156] In this example, the amount of LLDPE used in the preparation of the core particles was changed to 9.8 kg, the amount of EVA was changed to 0.2 kg, and the foaming conditions during foaming (specifically, the CO in the container during foaming) 2 Pressure) was changed to the conditions shown in Table 2 described later, and expanded beads and molded bodies were prepared in the same manner as in Example 1.

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Abstract

[Problem] To provide a composite resin foamed particle capable of stably obtaining a molded body with a relatively high proportion of a styrene resin component in a composite resin, good internal fusion and excellent antistatic property, an antistatic composite resin foamed particle and a molded body using the antistatic composite resin foamed particle. [Solution] A composite resin foamed particleusing a composite resin formed by impregnating a polymerized styrene monomer in an ethylene resin as a base material resin, an antistatic composite resin foamed particle wrapped by an antistatic agent and a molded body of the antistatic composite resin foamed particle. The composite resin contains a component derived from an ethylene resin and a component derived from a styrene monomer in a specified proportion. The ethylene resin is a mixture of straight chain-shaped low-density polyethylene and an ethylene copolymer having a polar group, and the content of the ethylene copolymer having thepolar group in the ethylene resin is adjusted to be within a specified range. The water vapor adsorption amount of the composite resin foamed particle is not less than 0.50 cm3/g.

Description

technical field [0001] The present invention relates to composite resin foamed particles, antistatic composite resin foamed particles, and antistatic composite resin foamed particles, which use composite resin obtained by impregnating and polymerizing styrene-based monomers in vinyl resin as base resin Formed bodies fused with each other. Background technique [0002] In-mold moldings of composite resin foamed particles containing ethylene-based resin components and styrene-based resin components (that is, composite resin foamed particle molded products) are used as packaging containers and cushioning packaging materials for components of electronic equipment and precision equipment. widely used. In molded articles for such applications, antistatic properties are generally imparted in order to prevent electrical damage caused by adhesion of dust and generation of overcurrent such as discharge. [0003] As a method of obtaining expanded composite resin particles, for exampl...

Claims

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Application Information

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IPC IPC(8): C08J9/18C08J9/224C08J9/228C08L23/08C08L25/06
CPCC08J9/18C08J9/224C08J9/228C08J2323/08C08J2425/06
Inventor 岛昌臣高木翔太
Owner JSP CORP
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