Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PLASTIC BOARD USING SPENT PLASTIC AS RAW MATERIAL AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP3528841
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a plastic board generating no adverse effect even when spent plastics containing a foreign substance is foamed to a lightweight multi-cellular structure.
SOLUTION: The plastic board has a central layer 1 and surface layers 2 and 2 formed on both surfaces of the central layer 1. The central layer 1 has the multi-cellular structure in which the spent plastics in which the foreign substances not melted by a melting, a kneading and a heating are mixed are foamed while being melted and kneaded as a raw material. A matrix resin for the surface layers 2 and 2 is composed of a resin having compatibility with the main component of the central layer 1. The surface layers 2 and 2 interrupt the deaeration of a gas from the central layer 1 even when the foreign substances are mixed in the spent plastics, a blowing gas is fixed and stabilized to the central layer 1 and a lightweight foamed structure is formed, and a smooth board surface is formed.


Inventors:
Furuta, Akihiko
Kato, Takayuki
Tsuruta, Hidekazu
Kamisaki, Akimasa
Suzuki, Katsunori
Kawasaki, Takeshi
Application Number:
JP2002225871A
Publication Date:
May 24, 2004
Filing Date:
August 02, 2002
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NKK CORP
International Classes:
E04G9/05; B32B5/18; (IPC1-7): E04G9/05; B32B5/18
Attorney, Agent or Firm:
石川 泰男