Title:
【発明の名称】包材の製造方法
Document Type and Number:
Japanese Patent JP3033784
Kind Code:
B2
Abstract:
PURPOSE:To efficiently produce a packaging material having an improved layer-to-layer adhesive strength and pressure resistance without causing the lowering of transparency, the increasing of manufacturing costs and the reduction of workability. CONSTITUTION:A jet of an ozone-containing gas is directed toward the resin extruded in a molten state at least from a T-die 15 in the form of a thin film to form a second resin layer and/or the surface of a first resin layer 4 laminated on an anchor coat layer 3 provided on a supporting base material 2 to accelerate air oxidation of the surface laminated with at least the first resin layer 4 of the second resin layer forming resin, whereby the packaging material having an improved layer-to-layer adhesive strength and pressure resistance is efficiently produced without causing the lowering of transparency, the increasing of the manufacturing costs and the reduction of workability.
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Inventors:
Hideharu Yamagishi
Fumihisa Kubota
Fumihisa Kubota
Application Number:
JP8260891A
Publication Date:
April 17, 2000
Filing Date:
April 15, 1991
Export Citation:
Assignee:
Dai Nippon Printing Co.,Ltd.
International Classes:
B29C47/06; B32B7/04; B32B27/16; B32B37/15; B29C47/02; B29L9/00; (IPC1-7): B32B31/30; B29C47/02; B29C47/06; B32B7/04; B32B27/16
Attorney, Agent or Firm:
Yasuo Ishikawa (2 outside)