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Title:
FUSION-BONDABLE PROPYLENE POLYMER COMPOSITION, FUSION-BONDABLE FILM, AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2007/046307
Kind Code:
A1
Abstract:
A fusion-bondable propylene polymer composition characterized by comprising: a propylene polymer composition (A) comprising a propylene polymer component (a1) and a propylene/ethylene random copolymer component (a2) having a propylene unit content of 63-77 mol% and an ethylene unit content of 23-37 mol%; an ethylene/α-olefin random copolymer (B); and a flexible propylene polymer (C) which has an ethylene content of 0-30 mol% and an α-olefin content of 0-30 mol% and which, when examined with a differential scanning calorimeter (DSC), has a melting point of 100°C or lower or no melting point. It is further characterized in that the amount of the propylene polymer composition (A) is 50-90 mass%, that of the ethylene/α-olefin random copolymer (B) is 3-25 mass%, and that of the flexible propylene polymer (C) is 0.5-40 mass% [(A)+(B)+(C)=100 mass%]. Also provided are a fusion-bondable film comprising the composition and a packaging bag comprising the film. The film has high heat-sealing strength and decreases little in heat-sealing strength even after a heat treatment. It is excellent in antiblocking properties, rigidity, and low-temperature impact strength.

Inventors:
MARUYAMA KAZUHIDE (JP)
TAKEISHI ICHIRO (JP)
INOUE NORIHIDE (JP)
HOYA HIROSHI (JP)
Application Number:
PCT/JP2006/320503
Publication Date:
April 26, 2007
Filing Date:
October 13, 2006
Export Citation:
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Assignee:
MITSUI CHEMICALS INC (JP)
TOHCELLO CO LTD (JP)
MARUYAMA KAZUHIDE (JP)
TAKEISHI ICHIRO (JP)
INOUE NORIHIDE (JP)
HOYA HIROSHI (JP)
International Classes:
C08L23/10; B65B55/04; B65D1/00
Foreign References:
JPH11293062A1999-10-26
JP2000230088A2000-08-22
JP2003096251A2003-04-03
JPH08283491A1996-10-29
JP2001172402A2001-06-26
JPH11291279A1999-10-26
JP2000129053A2000-05-09
JP2000255012A2000-09-19
JP2003096251A2003-04-03
JPH11293062A1999-10-26
JP2000230088A2000-08-22
Other References:
See also references of EP 1947142A4
Attorney, Agent or Firm:
SUZUKI, Shunichiro (Gotanda Yamazaki Bldg. 6F, 13-6, Nishigotanda 7-chome, Shinagawa-ku Tokyo31, JP)
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