Title:
POLYPROPYLENE MULTI-LAYER SEALANT FILMS FOR RETORT PACKAGING
Document Type and Number:
WIPO Patent Application WO2000063010
Kind Code:
A3
Abstract:
Polypropylene multi-layer sealant films for retort packaging, each including a multi-layer film composed mainly of at least one polypropylene polymer and to be laminated on one surface of a heat-resisting film, the multi-layer film having a first surface facing the heat-resisting film when laminated therewith and further having a second surface on the other side, the first surface having a surface roughness as defined below in (1), and the second surface having a surface roughness as defined below in (2): (1) (i) center-line mean roughness (Ra): 0.020 to 0.250 mu m; (ii) maximum height (Rmax): 0.3 to 2.9 mu m; and (iii) ten-point mean roughness (Rz): 0.2 to 2.4 mu m; (2) (i) center-line mean roughness (Ra): 0.050 to 0.300 mu m; (ii) maximum height (Rmax): 3.0 to 13.0 mu m; and (iii) ten-point mean roughness (Rz): 2.5 to 11.5 mu m.
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Inventors:
OSAME SATOSHI (JP)
YONEYAMA TADAO (JP)
OKO TSUTOMU (JP)
YONEYAMA TADAO (JP)
OKO TSUTOMU (JP)
Application Number:
PCT/JP2000/002433
Publication Date:
January 04, 2001
Filing Date:
April 14, 2000
Export Citation:
Assignee:
TOYO BOSEKI (JP)
OSAME SATOSHI (JP)
YONEYAMA TADAO (JP)
OKO TSUTOMU (JP)
OSAME SATOSHI (JP)
YONEYAMA TADAO (JP)
OKO TSUTOMU (JP)
International Classes:
B32B3/30; B32B27/32; B65D65/40; (IPC1-7): B32B27/32
Foreign References:
| EP0011796A1 | 1980-06-11 | |||
| US4741950A | 1988-05-03 | |||
| EP0444339A1 | 1991-09-04 | |||
| EP0618070A1 | 1994-10-05 |
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