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Propylene-based resin foam particle and foam particle molded body

A technology of acrylic resin and expanded particles, which is applied in the direction of coating, etc., can solve the problems of difficult forming and processing, and achieve the effects of excellent fusion, excellent heat resistance, and excellent secondary foaming

Active Publication Date: 2016-08-24
JSP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the in-mold molding using expanded propylene-based resin particles, due to the crystallinity and heat resistance of propylene-based resins, it is difficult to mold such that the molding pressure of a heating medium such as water vapor becomes high. Need to improve

Method used

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  • Propylene-based resin foam particle and foam particle molded body
  • Propylene-based resin foam particle and foam particle molded body
  • Propylene-based resin foam particle and foam particle molded body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5、 comparative example 1 and comparative example 2

[0176] 1. Selection of low melting point propylene resin (resin a1) for the core layer

[0177] 1) Low melting point propylene resin 1

[0178] An ethylene-propylene random copolymer (ethylene content 2.8% by weight, melting point 135° C., melt flow rate 8 g / 10 minutes) obtained by polymerization in the presence of a metallocene polymerization catalyst was used.

[0179] 2) Low melting point propylene resin 2

[0180] An ethylene-propylene random copolymer (ethylene content 2.6% by weight, melting point 137° C., melt flow rate 7 g / 10 min) obtained by polymerization in the presence of a metallocene-based polymerization catalyst was used.

[0181] 3) Low melting point propylene resin 3

[0182] An ethylene-propylene random copolymer (ethylene content 4.0% by weight, melting point 138° C., melt flow rate 8 g / 10 min) obtained by polymerization in the presence of a Ziegler-Natta type polymerization catalyst was used.

[0183] 2. Selection of high melting point propylene resin (r...

Embodiment 6

[0247] In the manufacture of the expanded propylene resin particle molded body, except that a flat plate molding die with a length of 200 mmⅹ a width of 250 mm×a thickness of 50 mm is used, and the molding pressure is set to 0.14 MPa (G), other conditions are the same as in the above-mentioned embodiment 1, and An expanded particle molded body was obtained. Table 3 shows the physical properties of the expanded beads and expanded bead molded body.

[0248] [Table 2]

[0249] Table 2

[0250]

[0251] *1) Amount based on 100 parts by weight of the total of cladding layer and core layer

[0252] [table 3]

[0253]

[0254] In Table 3, [Percentage of Main / Full] is a value calculated according to the following method. According to the heat flux differential scanning calorimetry measurement, the "main endothermic peak heat" column and "full endothermic peak heat" in Table 3 are obtained from the first DSC curve obtained when the expanded particles are heated from normal te...

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Abstract

The present invention is a propylene-based resin foam particle which includes a foamed ocre layer containing (a) a propylene-based resin composition that satisifies (i) and (ii) and a coating layer containing (b) an olefin-based resin that satisifies (iii) or (iv). (i) A mixture of (al) 75-98 wt.% of a propylene-based resin having a melting point of 100-140 DEG C and (a2) 25-2 wt.% of a propylene-based resin having a melting point of 140-165 DEG C. (ii) The difference between the melting point of the resin (a2) and that of the resin (a1) is 15 DEG C or more. (iii) A crystalline olefin-based resin which has a melting point (TmB) that is lower than the melting point (TmA) of the composition (a), and in which 0 DEG C<[TmA-TmB]<=80 DEG C. (iv) A non-crystalline olefin-based resin which has a softening point (TsB) that is lower than TmA, and in which 0 DEG C<[TmA-TsB]<=100 DEG C.

Description

technical field [0001] The present invention relates to expanded propylene resin particles and expanded particle molded articles. Background technique [0002] Foamed resin particles are lightweight, cushioning, and heat insulating, and the three-dimensional shape of the molded body obtained by in-mold molding has a high degree of freedom in shape design, so it is used as a cushioning material, container, heat insulating material, vibration-proof material, etc. It can be used in multi-purpose fields such as packaging, daily necessities materials, civil construction materials, and vehicle parts materials. The expanded resin particles can be broadly classified into expanded resin particles comprising a styrene-based resin as a base resin and expanded resin particles comprising an olefin-based resin as a base resin. Among them, foamed resin particles using styrene resin as the base resin have a good balance between light weight and compressive strength, easy in-mold molding, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/16
CPCC08J2323/14C08J9/0061C08J9/232C08J2423/06C08J9/16C08J2201/034C08J2203/06C08J2323/10C08J2423/14C08J2323/16C08J2423/16C08J9/224C08J9/22C08J9/365C08J2423/10C08J2423/04
Inventor 小野通俊北原泰三鹤饲和男
Owner JSP CORP
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