Unlock instant, AI-driven research and patent intelligence for your innovation.

Resin expanded particles, resin expanded molded bodies, and laminates

A technology of foam molding and foam particles, which is applied in the direction of synthetic resin layered products, layered products, transportation and packaging, etc., to achieve the effect of high sound absorption performance

Active Publication Date: 2022-08-09
ASAHI KASEI KK
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] The foamed molded article with a skin described in Patent Document 12 is a laminate obtained by making a skin material made of a raw material that does not have or lacks air permeability, or the outer surface is made of a woven fabric or a nonwoven fabric. After the formed skin material is installed in the mold, the mold is filled with particles, fragments, and pulverized materials composed of thermoplastic resin foam, the foam is fused, and the foam and the skin material are fused and integrated at the same time. Thus, a laminate is obtained. As a skin material capable of in-mold molding by selecting the shape of the particles so that the space ratio is high, a skin material made of a nonwoven fabric on the outer surface is described. There is no description of a laminate of thermoplastic foam and nonwoven fabric, and specific examples are only resin sheets such as polypropylene-based thermoplastic elastomers, so there is no suggestion that the sound-absorbing effect can be improved by lamination.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Resin expanded particles, resin expanded molded bodies, and laminates
  • Resin expanded particles, resin expanded molded bodies, and laminates
  • Resin expanded particles, resin expanded molded bodies, and laminates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0205] Polyamide 6 resin (UBE Nylon "1022B", manufactured by Ube Industries, with a surface tension of 46 mN / m at 20°C) was melted using an extruder, and image 3 The strand discharged from the profiled extrusion die having the cross-sectional shape described in (a1) was pelletized by a pelletizer to obtain pellets having an average particle diameter of 1.4 mm. The obtained pellets were put into an autoclave at 10° C., and carbon dioxide gas of 4 MPa was blown in and absorbed for 3 hours. Next, the carbon dioxide-impregnated small pellets were transferred to a foaming device, and air at 240° C. was blown in for 20 seconds to obtain a polyamide resin foamed particle aggregate. The average particle diameter of the polyamide resin expanded particles contained in the obtained polyamide resin expanded particle aggregate was 2.0 mm. When the polyamide resin foamed particle was cut and observed, a large number of closed cells were uniformly formed on one surface of the cross section...

Embodiment 2～5

[0208] Polyphenylene ether resin (trade name: Zylon TYPE S201A, manufactured by Asahi Kasei Co., Ltd., surface tension at 20°C: 40 mN / m) 60% by mass, non-halogen flame retardant (bisphenol A-bis(diphenylphosphoric acid) Ester) (BBP)) 18 mass %, rubber concentration of 6 mass % of impact-resistant polystyrene resin (HIPS) 10 mass % (rubber component content in base resin 0.6 mass %) and general-purpose polystyrene resin (PS) (trade name: GP685, manufactured by PS Japan Co., Ltd.) 12% by mass, heated, melt-kneaded using an extruder, and image 3 The strands discharged from the profiled extrusion die are pelletized by a pelletizer to obtain pellets. According to the method described in Example 1 of Japanese Patent Application Laid-Open No. 4-372630, the above-mentioned pellets as the base resin were accommodated in a pressure-resistant container, the gas in the container was replaced with dry air, and then injected as a foaming agent. carbon dioxide (gas) of 3.2 MPa pressure and...

Embodiment 6

[0212] 100 parts by weight of a polycondensate of ethylene glycol, isophthalic acid and terephthalic acid (2% by weight of isophthalic acid, 43 mN / m of surface tension at 20°C), 0.3 part by weight of pyromellitic dianhydride, and A mixture of 0.03 parts by weight of sodium carbonate was melted and kneaded with an extruder at 270 to 290°C, and at the same time, butane as a foaming agent was injected at a rate of 1.0% by weight relative to the mixture in the middle of the barrel, and passed through image 3 (f1) Immediately after pre-expanding the profiled extrusion die described in (f1), it was cooled in a cooling water tank and cut into small pellets using a pelletizer to produce resin foam pellets. The cross-section of the obtained resin foam particles is image 3 (f2).

[0213] The bulk density of the obtained resin foam particles was 0.14 g / cm 3 , The average particle size is 1.5mm.

[0214] The above-mentioned resin foam particles were put into a closed container, and c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
glass transition temperatureaaaaaaaaaa
particle sizeaaaaaaaaaa
surface tensionaaaaaaaaaa
Login to View More

Abstract

An object of the present invention is to provide a resin foamed particle capable of molding a sound-absorbing member having excellent sound-absorbing performance based on a resin foamed molded body. Another object of the present invention is to provide a laminate using a resin foam molding as a base material, which can obtain high sound absorbing performance even with a thin material. The resin foam particle of the present invention is a resin foam particle containing a resin and having a concave outer shape portion, wherein the density ρ of the resin is 0 The true density ρ of the above-mentioned resin foamed particles 1 ratio ρ 0 / ρ 1 is 2 to 20, the true density ρ of the above-mentioned resin foam particles 1 with the bulk density ρ of the above-mentioned resin foamed particles 2 ratio ρ 1 / ρ 2 is 1.5 to 4.0.

Description

technical field [0001] The present invention relates to foamed resin particles of a special shape, and resin foamed molded bodies and laminates having continuous voids and excellent sound absorbing properties obtained by fusing and molding the foamed resin particles. Background technique [0002] Resin foamed materials are used as structural materials for parts and containers of automobiles or electronic equipment as an alternative to existing solid resin materials and metal materials. As the characteristics of these resin foam materials, there are low density, high thermal insulation properties, and cushioning properties, and these properties are mainly used effectively. On the other hand, as the properties expected in the resin foam material, the sound absorption property and the sound barrier property can be mentioned, but the application range thereof has been limited until now. [0003] The reason for this is that the sound absorption and sound barrier properties are n...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/16B29C44/00B29C67/20
CPCB29C44/00B29C67/20C08J9/16C08J9/0095C08J9/232C08J9/18C08J2377/12C08J2371/12C08J2367/03B32B5/245B32B2266/0228B32B5/08B32B5/26B32B2262/12B32B2307/102B32B2262/0261B32B5/022B32B2307/3065B32B2307/402B32B2262/0253B32B2307/724B32B2266/0242B32B2266/0257B32B7/12B32B2266/0235B32B5/024B32B2266/0285B32B5/18B32B2307/732B32B2250/04B32B27/12B32B2266/025B32B2262/0284B32B2266/0264B32B2307/73B32B2605/00B32B27/20B32B2307/72B32B2307/718B32B2262/14B32B2266/0278C08J2201/03C08J9/122C08J2323/16C08J9/228B29C44/3461B29K2071/12B29K2077/00B29K2105/0026B32B2266/0214B32B2305/022C08J2367/02C08J2377/02
Inventor 中本哲生
Owner ASAHI KASEI KK