Title:
HIGH FREQUENCY FUSING METHOD FOR POLYPROPYLENE SHEET AND INSULATING MATERIAL USED THEREIN
Document Type and Number:
Japanese Patent JP3673901
Kind Code:
B2
Abstract:
PURPOSE: To simply fuse a polypropylene sheet of which the high frequency fusion is considered to be difficult by high frequency fusion and to provide an insulating material used in high frequency fusion.
CONSTITUTION: An insulating material 5 obtained by impregnating a fiber base material with varnish of which the dielectric constant and dielectric loss are higher than those of polypropylene is placed on a base stand 1 and a plurality of polypropylene sheets 6 are placed thereon and a mold 2 heated to temp. higher than 50°C but lower than the m.p. of polypropylene is pressed to the sheets from above to apply high frequency voltage across the mold and the base stand.
Inventors:
Kosuke Iida
Yoji Sumino
Katsumi Miyaura
Yoji Sumino
Katsumi Miyaura
Application Number:
JP9982695A
Publication Date:
July 20, 2005
Filing Date:
March 31, 1995
Export Citation:
Assignee:
Takiron Co., Ltd.
International Classes:
B29C65/04; B29K23/00; B29L7/00; (IPC1-7): B29C65/04
Domestic Patent References:
| JP62074628A | ||||
| JP62261423A |
Attorney, Agent or Firm:
Hiroyuki Nakai