MULTI-LAYER BLOW MOLDED PRODUCT

Japanese Patent JP3800716

B2

PROBLEM TO BE SOLVED: To make surface characteristics, heat insulation, a vibration control property, and a recycling property excellent by a method wherein a surface hardness of a surface layer is made a specific value, a thickness of the surface layer is made to have a specific ratio to a thickness of a base layer, and inside layer is made of a foam, and adhesion strength of each layer is made a specific value.
SOLUTION: A surface hardenness of a surface layer (a) is made HB or higher pencil hardness, a thickness T1 of the surface layer (a) is made 50% or under of a thickenss T2 of a base layer (b), an inside layer (c) is made of a foam, and adhesion strength of each layer is made 1 kgf or higher. Further, a wall thickness of the surface layer (a) is preferably 0.5 mm or over, and a tensile strength of a raw material of a base layer (b) is preferably 800 kg/cm2 or higher in a user region at 20 to 75°C. Further, a density of the foam layer (c) is preferably 10 to 500 kg/m2. Thermoplastic resin capable of being used for a multi-layer blowed product is, for example, polyethylene polypropylene, polystyrene, polyethylene terephthalate, nylon, ABS resin, etc., and preferably crystalline resin.

Kumamoto Mitsuyoshi
Fumio Kurihara
Yasuhito Ito

JP10661397A

July 26, 2006

April 08, 1997

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JSR CORPORATION

B29C49/22; B32B5/18; B29C49/04; B29C49/20; B29C49/48; B29C51/14; B29K105/04; B29K105/06; (IPC1-7): B29C51/14; B32B5/18

JP7112480A
JP2227210A
JP8276434A
JP6182862A
JP9156054A
JP8309834A
JP6126814A
JP3084112U

Akio Maruyama

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