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Title:
LAMINATE
Document Type and Number:
WIPO Patent Application WO/1997/002141
Kind Code:
A1
Abstract:
A laminate comprising at least four layers, i.e., an innermost seal layer (A) made of a polypropylene having a melting point of 160�C or above as the first layer, an adjacent layer (B) made of a mixture comprising 20 to 90 wt.% of polypropylene and 80 to 10 wt.% of a 4-methylpentene-1 resin as the second layer, an interlayer (C) made of a polypropylene having a melting point of 160�C or above and a melt index of 0.5 to 30 as the third layer, and an outermost base layer (D) made of a polypropylene having a melting point of 160�C or above and a melt index of 0.01 to 4, wherein the melt index of the seal layer (A) is at least 1.1 times that of the interlayer (C), the melt index of the interlayer (C) is larger than that of the base layer (D), the peeling strength between the layers (A) and (B) is lower than that between the layers (B) and (C), and the peeling strength between the layers (A) and (B) is 0.2 to 2.5 kg/15 mm (as determined at a rate of pulling of 300 mm/min).

Inventors:
TATUMI YASUO (JP)
YOSHIMOTO MAMORU (JP)
AKAZAWA SEIGOU (JP)
Application Number:
PCT/JP1996/001793
Publication Date:
January 23, 1997
Filing Date:
June 28, 1996
Export Citation:
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Assignee:
SUMITOMO BAKELITE CO (JP)
TATUMI YASUO (JP)
YOSHIMOTO MAMORU (JP)
AKAZAWA SEIGOU (JP)
International Classes:
B65D81/34; B32B1/02; B32B27/32; B65D65/40; B65D77/38; C08L23/10; C08L23/12; C08L23/18; B65D77/20; C08L23/20; (IPC1-7): B32B27/32; B32B1/02; B32B7/06; B65D41/44
Foreign References:
JPH08230120A1996-09-10
JPH072409B21995-01-18
Other References:
See also references of EP 0870603A4
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