Title:
SEALING MATERIAL
Document Type and Number:
Japanese Patent JP3941897
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a sealing material containing a polyolefin as a main component which is excellent in sealability, transparency, mechanical strength, and others, is capable of a high frequency seal, and can be used as a substitute for a polyvinyl chloride material.
SOLUTION: A high frequency sealing material is prepared by a method in which (A) on one side or both sides of a layer which is prepared from an ethylene-carbon monoxide copolymer and/or an ethylene-vinyl acetate copolymer and has the product of a dielectric constant of 13.56 MHz frequency and a dielectric loss tangent of at least 0.1, (B) an ethylene-α-olefin copolymer sealing layer which is prepared by a single site catalyst and has a density of 860-905 kg/m3 is formed.
Inventors:
Kenichi Yoshikawa
Kamikatsu Akira
Kamikatsu Akira
Application Number:
JP26124597A
Publication Date:
July 04, 2007
Filing Date:
September 26, 1997
Export Citation:
Assignee:
Mitsui DuPont Polychemical Co., Ltd.
International Classes:
B32B27/28; B32B27/32; C08G67/02; C09J131/04; C09J173/00; (IPC1-7): B32B27/28; B32B27/32; C08G67/02; C09J131/04; C09J173/00
Domestic Patent References:
| JP60501218A |
Attorney, Agent or Firm:
Kazu Yamaguchi