Title:
【発明の名称】写真感光材料用包装材料
Document Type and Number:
Japanese Patent JP2731958
Kind Code:
B2
Abstract:
PURPOSE:To obtain the packaging material which can freely control the adhesive strength of blocking by using a tackiness imparting agent and a polyolefin resin of a low degree of polymn. to the innermost layer of multilayered coextruded inflation films. CONSTITUTION:The innermost layers 2 have the laminated films of the vertically symmetrical structure formed by having the multilayered coextruded inflation films 3 of a thermoplastic resin compsn. contg. 0.05 to 10wt.% polyolefin resin of the low degree of polymn., 0.05 to 10wt.% tackiness imparting agent and 0.01 to 0.8wt.% antioxidant and adhering the innermost layers 2 of the inflation films to each other by the blocking B. Pseudo adhesion is caused by the blocking in a soft state to some extent in the blocking adhesion of the innermost layers 2 without using any adhesive agent at all, by which the physical strength is improved and curling is prevented. The adhesive strength by the blocking is freely controlled by the amt. of the polyolefin resin of the low degree of polymn. and tackiness imparting agent used. The packaging material which can be surely blocked over the entire surface is thus obtd.
Inventors:
AKAO MUTSUO
Application Number:
JP26218089A
Publication Date:
March 25, 1998
Filing Date:
October 09, 1989
Export Citation:
Assignee:
FUJI SHASHIN FUIRUMU KK
International Classes:
B29C47/06; B29C55/28; G03C3/00; B32B27/32; B29K23/00; B29L9/00; (IPC1-7): G03C3/00; G03C3/00
Domestic Patent References:
| JP194341A | ||||
| JP1156741A | ||||
| JP652402B2 |
Attorney, Agent or Firm:
Masahiro Tanaka