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High-density polyethylene mixed resin particles, composite resin particles, foamed particles and foamed molded body

一种高密度聚乙烯、混合树脂的技术，应用在高密度聚乙烯混合树脂颗粒、复合树脂颗粒、发泡颗粒和发泡成形体领域，能够解决温度依赖性高等问题，达到改善耐冲击性的效果

Active Publication Date: 2016-09-07
SEKISUI PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a molded foam has a problem that the temperature dependence of mechanical properties is high.

Method used

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  • High-density polyethylene mixed resin particles, composite resin particles, foamed particles and foamed molded body
  • High-density polyethylene mixed resin particles, composite resin particles, foamed particles and foamed molded body
  • High-density polyethylene mixed resin particles, composite resin particles, foamed particles and foamed molded body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0151] 100 parts by weight have 936kg / m 3 High-density polyethylene (product model 09S53B, manufactured by Tosoh Corporation) with a density of 2.6 g / 10 minutes, an MFR of 2.6 g / 10 minutes, a melting point of 123° C. and a softening temperature of 118° C. and 67 parts by weight of ethylene-vinyl acetate copolymer (ethylene copolymer Copolymer of aliphatic saturated monocarboxylic acid vinyl ester and ethylene: product model LV115, manufactured by Japanese Polyethylene Corporation, MFR: 0.3 g / 10 minutes, melting point: 108°C, softening temperature: 80°C, and source of vinyl acetate The content of the component: 4% by weight) was supplied to the drum mixer and mixed for 10 minutes.

[0152] Next, the resin mixture is supplied to an extruder, melt-kneaded at a temperature of 230-250° C., pelletized according to the water cutting method, and cut into ellipsoidal (oval) shapes to obtain high-density polyethylene mixed resin pellets (seed particles). The average weight of the high...

Embodiment 2

[0161] In addition to changing the bulk density of the expanded particles and the density of the expanded molded body to 21kg / m 3 Except, in the same manner as in Example 1, a foamed molded body having a fusion rate of 90% or more was obtained. The obtained expanded molded article had a good appearance.

Embodiment 3

[0163] In addition to changing the bulk density of the expanded particles and the density of the expanded molded body to 33kg / m 3 Except, in the same manner as in Example 1, a foamed molded body having a fusion rate of 90% or more was obtained. The obtained expanded molded article had a good appearance.

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Abstract

These high-density polyethylene mixed resin particles are used as seed particles during seed polymerization, and contain a mixed resin of 100 parts by weight high-density polyethylene and 20-100 parts by weight of an ethylene copolymer, wherein the aforementioned high-density polyethylene has a density of 935-960 kg / m3 and has a softening temperature of 115-130 DEG C; the aforementioned ethylene copolymer is a copolymer of ethylene and an ester monomer selected from an acrylic acid alkyl ester and an aliphatic saturated monocarboxylic acid vinyl, contains 1-20 wt% of the ester monomer-derived component, and has a softening temperature of 75-110 DEG C; the aforementioned acrylic acid alkyl ester is selected from methyl acrylate and ethyl acrylate; and the aforementioned aliphatic saturated monocarboxylic acid vinyl is selected from vinyl acetate and vinyl propionate.

Description

technical field [0001] The present invention relates to high-density polyethylene mixed resin particles, composite resin particles, expanded (expanded) particles and expanded (expanded) molded bodies. More specifically, the present invention relates to an expanded molded body having improved mechanical properties even at a high expansion ratio, expanded particles capable of applying the expanded molded body without requiring high-pressure foam molding, for Composite resin particles producing the expanded particles, and high-density polyethylene mixed resin particles used as seed particles when the composite resin particles are obtained by a seed polymerization method. Background technique [0002] It is known that foamed molded articles comprising polystyrene-based resins are excellent in rigidity, thermal insulation, light weight, cement resistance, and foamed moldability. Therefore, the foamed molded body has been widely used as a cushioning material and a heat insulating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08J9/18C08J9/228
CPCC08J9/0014C08J9/0019C08J9/0023C08J9/0061C08J9/141C08J9/232C08J2203/14C08J2205/052C08J2325/06C08J2423/06C08J2423/08C08J2433/04C08J2431/02C08F255/02C08F285/00C08L23/06C08L25/06C08J9/18C08L23/0853C08F212/08C08J9/0028C08J2431/04C08J2433/08
Inventor 大脇皓树权藤裕一
Owner SEKISUI PLASTICS CO LTD