Aromatic polyester-based resin foam particles for in-mold foam molding, method for producing same, in-mold foam molded body, composite structural member, and member for automobile

A technology for aromatic polyester and foam moldings, which is applied to synthetic resin layered products, chemical instruments and methods, transportation and packaging, and can solve the problem of storage time (short molding life, insufficient foaming Eliminate miscellaneous problems, and achieve the effect of excellent mechanical strength and appearance, and long molding life

Inactive Publication Date: 2014-04-30
SEKISUI PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] As shown in the comparative example, the above-mentioned primary expanded particles are produced by cutting the strand-shaped foam using a granulator or the like, and are formed in a substantially cylindrical shape, and have poor filling properties into the mold. a question
In addition, although the pre-expanded particles obtained by re-expanding (pre-expanding) the primary expanded particles have improved the above-mentioned problems, they still have an approximately cylindrical shape and poor filling properties in the mold. question
[0008] Furthermore, since the primary expanded particles are produced by cutting the cooled strand-shaped foam, the resulting primary expanded particles and pre-expanded particles expose the cell section at the cut surface, and the primary expanded particles and the pre-expanded particles are used. The foamed molded product obtained by in-mold foam molding of foamed particles has a state in which bubbles are partially scattered on the surface, and there is a problem that a patchy pat

Method used

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  • Aromatic polyester-based resin foam particles for in-mold foam molding, method for producing same, in-mold foam molded body, composite structural member, and member for automobile
  • Aromatic polyester-based resin foam particles for in-mold foam molding, method for producing same, in-mold foam molded body, composite structural member, and member for automobile
  • Aromatic polyester-based resin foam particles for in-mold foam molding, method for producing same, in-mold foam molded body, composite structural member, and member for automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0167] used figure 1 and figure 2 Fabrication setup shown. First, a single-screw extruder with a diameter of 65 mm and an L / D ratio of 35 supplied polyethylene terephthalate (trade name "SA-135" manufactured by Mitsui Chemicals Co., Ltd., melting point: 247.1°C, properties Viscosity: 0.88) 100 parts by weight, masterbatch containing talc in polyethylene terephthalate (polyethylene terephthalate content: 60% by weight, talc content: 40% by weight, polyethylene terephthalate content: 40% by weight, polyethylene terephthalate Intrinsic viscosity of ethylene terephthalate: 0.88) A polyethylene terephthalate composition comprising 1.8 parts by weight and 0.20 parts by weight of pyromellitic anhydride was melt-kneaded at 290°C.

[0168] Next, butane composed of 35% by weight of isobutane and 65% by weight of n-butane was pressed into the molten state at 0.7 parts by weight relative to 100 parts by weight of polyethylene terephthalate from the middle of the extruder. In the poly...

Embodiment 2）

[0179] On the way from the extruder, butane composed of 35% by weight of isobutane and 65% by weight of n-butane was injected into the polyethylene terephthalate in a molten state at 0.3 parts by weight relative to 100 parts by weight of polyethylene terephthalate. In the polyethylene terephthalate composition, it was uniformly dispersed in polyethylene terephthalate, except that, the same operation as in Example 1 was carried out to obtain polyethylene terephthalate for in-mold foam molding. Ethylene glycol diformate foamed particles.

Embodiment 3）

[0181] On the way from the extruder, butane composed of 35% by weight of isobutane and 65% by weight of n-butane was injected into the polyethylene terephthalate in a molten state at 0.65 parts by weight relative to 100 parts by weight of polyethylene terephthalate. In the polyethylene terephthalate composition, it was uniformly dispersed in polyethylene terephthalate, except that, the same operation as in Example 1 was carried out to obtain polyethylene terephthalate for in-mold foam molding. Ethylene glycol diformate foamed particles.

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PUM

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Abstract

The present invention provides aromatic polyester-based resin foam particles for in-mold foam molding, whereby it is possible to produce an in-mold foam molded body having a long post-production storage life and also offering excellent mechanical strength and outer appearance. These aromatic polyester-based resin foam particles for in-mold foam molding are characterized in comprising an aromatic polyester-based resin and in that the residual ratio of carbon dioxide when 7 hours have elapsed since 24 hours of impregnation with the carbon dioxide under conditions of 25 DEG C and 1 MPa is 5 wt% or more.

Description

technical field [0001] The present invention relates to aromatic polyester resin foamed particles for in-mold foam molding, a method for producing the same, an in-mold foam molded article, a composite structural member, and a member for automobiles. In the following description, "foamed aromatic polyester-based resin particles for in-mold foam molding" may be simply referred to as "foamed aromatic polyester-based resin particles". Background technique [0002] In-mold foam molding has been conventionally used as a method of producing an aromatic polyester resin foam molded article by foaming the foamed aromatic polyester resin particles. In-mold foam molding refers to a molding method that includes the following steps: the process of filling the foamed particles of aromatic polyester resin in the mold; Secondary foamed particles obtained by heating and foaming the foamed resin particles, and secondary foaming of the foamed aromatic polyester resin particles by the foaming p...

Claims

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Application Information

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IPC IPC(8): C08J9/16
CPCB29C44/3461C08J9/18C08J9/228C08J2367/02C08J9/16B29B9/065B29B9/12B29B2009/125Y10T428/249953B32B5/18B32B27/36C08G63/183C08J9/122
Inventor 桑原佑辅川守田祥介諌山显大胁皓树福崎裕太
Owner SEKISUI PLASTICS CO LTD
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