BIAXIALLY ORIENTED POLYPROPYLENE FILM

Title:

BIAXIALLY ORIENTED POLYPROPYLENE FILM

Document Type and Number:

WIPO Patent Application WO/1998/003579

Kind Code:

A1

Abstract:

A biaxially oriented polypropylene film in which the relation among a melt viscosity $g(h)�0? thereof measured when a melt flow rate and a shear speed determined by a rotary rheometer are 1-12 g/10 min and 0 rad/sec respectively, a melt viscosity $g(h)�10? thereof measured when a shear speed is 10 rad/sec and MFR satisfies the following expression (1): log(($g(h)�0?-$g(h)�10?)/$g(h)�10?)+0.7 logMFR$m(F)0.7. Therefore, a biaxially oriented polypropylene film having a high sealing strength of a melt seal portion, small scatter of the sealing strength, a high rigidity enabling the bag manufacturing efficiency and material filling efficiency to be improved, and high transparency and glossiness is obtained.

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Inventors:

SHIRAISHI YASUHIRO (JP)
ANDOU YUJI (JP)
SAITOU NORIAKI (JP)

Application Number:

PCT/JP1997/002533

Publication Date:

January 29, 1998

Filing Date:

July 22, 1997

Export Citation:

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Assignee:

CHISSO CORP (JP)
SHIRAISHI YASUHIRO (JP)
ANDO YUJI (JP)
SAITO NORIAKI (JP)

International Classes:

B29C55/12; B29D7/01; C08J5/18; C08L23/10; C08L23/16; B29K23/00; B29L7/00; (IPC1-7): C08J5/18; B29C55/12; B32B27/32

Foreign References:

JPH09169050A	1997-06-30
JPH08119292A	1996-05-14

Other References: