Title:
ポリプロピレンまたはポリ(エチレン/プロピレン)及び炭酸カルシウムを含んだ剛性及び耐衝撃性を有する組成物とそれよりなる蓋、ポリプロピレンまたはポリ(エチレン/プロピレン)と組成物及び蓋の剛性及び耐衝撃性を高める方法、及び蓋の耐衝撃性を測定する方法
Document Type and Number:
Japanese Patent JP2004502613
Kind Code:
A
Abstract:
Stiff and impact resistant closures derived from the stiff and impact resistant blends including poly(propylene) or poly(ethylene/propylene) and calcium carbonate; stiff and impact resistant compositions including poly(propylene) or poly(ethylene/propylene) and calcium carbonate; methods for increasing stiffness and impact resistance of a poly(propylene) or poly(ethylene/propylene) resin, or a closure; and a method for measuring the impact strength of a closure or a resin at a reduced temperature are disclosed. A presently preferred blend contains from about 40 to about 60 weight percent of poly(propylene) or poly(ethylene/propylene) and from about 25 to about 35 weight percent of calcium carbonate particles treated with fatty acid, the treated particles having a particle size of from about 2.5 to about 3.5 microns.
Inventors:
Goldman, Anatoly
Application Number:
JP2002509415A
Publication Date:
January 29, 2004
Filing Date:
July 11, 2001
Export Citation:
Assignee:
Alcoa Closure Systems International, Inc.
International Classes:
B29B7/48; B29C48/12; B29C48/40; B65D41/04; B65D41/34; C08J3/20; C08K9/04; C08L23/10; C08L23/16; B29C48/00; (IPC1-7): B65D41/34; B29B7/48; C08J3/20; C08K9/04; C08L23/10; C08L23/16
Domestic Patent References:
| JPS59122533A | 1984-07-16 | |||
| JPH0429953U | 1992-03-10 | |||
| JPS62279927A | 1987-12-04 | |||
| JPS58166048A | 1983-10-01 | |||
| JPH10168250A | 1998-06-23 | |||
| JPH0987447A | 1997-03-31 | |||
| JP2001064458A | 2001-03-13 | |||
| JPH06157836A | 1994-06-07 | |||
| JPH06172593A | 1994-06-21 |
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito