US4980200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing printed containers for retortable materials
Assignee: Resonac Holdings Corp
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Filing: 1988-11-30
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Granted: 1990-12-25
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Expires: 2008-11-30
Abstract
Abstract A method of producing printed containers for retortable material comprising subjecting the outer surfaces of sheets or container of polyolefin to a flame treatment to produce a wet index of 45 dyne/cm or higher and then printing the outer surfaces. The polyolefin used comprises an olefin polymer compound comprising a mixture of (a) 100 parts by weight of a crystalline propylene polymer having a melt flow index of 0.1-100 g/10 min and (b) 3.0-30 parts by weight of an ethylene polymer having a density of 0.925-0.975 g/cc and a melt index of 0.1-20 g/10 min; or an olefin polymer compound comprising a mixture of (a) 100 parts by weight of a crystalline propylene polymer having a melt flow index of 0.1-100 g/10min, (b) 3.0-30 parts by weight of an ethylene polymer having a density of 0.925-0.975 g/cc and a melt flow index of 0.1-20 g/10 min, and (c) 2.0-25 parts by weight of an ethylene-propylene copolymer rubber having a Mooney viscosity (ML 1+4·100° C.) of 140 or less and containing 20-70 weight percent propylene.
Inventors
- 👤 Takeshi Takahashi
- 👤 Yoshitsugu Hamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:02
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; B; B29; B29C; B29C59/00; B29C59/08; C08L23/14; C08L23/142; B29K; B29K2023/00; B29K2023/10; B29K2023/12; C08L2205/00; C08L2205/03; C08L23/04; C08L23/06; C08L23/08; C08L23/0807; C08L23/0815; C08L23/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
190 words
A method of producing printed containers for retortable materials comprising subjecting the outer surfaces of sheets or containers of polyolefin to a flame treatment to produce a wet index of 45 dyne/cm or higher according to the JIS K 6768 test and then printing said outer surfaces, wherein said polyolefin comprises (1) an olefin polymer compound comprising a mixture of (a) 100 parts by weight of a crystalline propylene polymer having a melt flow index of 0.1-100 g/10 min and (b) 3.0-30 parts by weight of an ethylene polymer having a density of 0.925-0.975 g/cc and a melt index of 0.1-20 g/10 min; or (2) an olefin polymer compound comprising a mixture of (a) 100 parts by weight of a crystalline propylene polymer having a melt flow index of 0.1-100 g/10 min, (b) 3.0-30 parts by weight of an ethylene polymer having a density of 0.925-0.975 g/cc and a melt flow index of 0.1-20 g/10 min, and (c) 2.0-25 parts by weight of an ethylene-propylene copolymer rubber having a Mooney viscosity (ML1+4·100° C.) of 140 or less according to the JIS K 6300 test and containing 20-70 weight percent propylene.
Claim 2
Independent Claim
190 words
A method of producing printed containers for retortable materials comprising subjecting the outer surfaces of sheets or containers of polyolefin to a flame treatment to produce a wet index of 45 dyne/cm or higher according to the JIS K 6768 test and then printing said outer surfaces, wherein said polyolefin comprises (1) an olefin polymer compound comprising a mixture of (a) 100 parts by weight of a crystalline propylene polymer having a melt flow index of 0.1-100 g/10 min and (b) 3.0-30 parts by weight of an ethylene polymer having a density of 0.925-0.975 g/cc and a melt index of 0.1-20 g/10 min; or (2) an olefin polymer compound comprising a mixture of (a) 100 parts by weight of a crystalline propylene polymer having a melt flow index of 0.1-100 g/10 min, (b) 3.0-30 parts by weight of an ethylene polymer having a density of 0.925-0.975 g/cc and a melt flow index of 0.1-20 g/10 min, and (c) 2.0-25 parts by weight of an ethylene-propylene copolymer rubber having a Mooney viscosity (ML1+4·100° C.) of 140 or less according to the JIS K 6300 test and containing 20-70 weight percent propylene.
Claim 3
Independent Claim
190 words
A method of producing printed containers for retortable materials comprising subjecting the outer surfaces of sheets or containers of polyolefin to a flame treatment to produce a wet index of 45 dyne/cm or higher according to the JIS K 6768 test and then printing said outer surfaces, wherein said polyolefin comprises (1) an olefin polymer compound comprising a mixture of (a) 100 parts by weight of a crystalline propylene polymer having a melt flow index of 0.1-100 g/10 min and (b) 3.0-30 parts by weight of an ethylene polymer having a density of 0.925-0.975 g/cc and a melt index of 0.1-20 g/10 min; or (2) an olefin polymer compound comprising a mixture of (a) 100 parts by weight of a crystalline propylene polymer having a melt flow index of 0.1-100 g/10 min, (b) 3.0-30 parts by weight of an ethylene polymer having a density of 0.925 -0.975 g/cc and a melt flow index of 0.1-20 g/10 min, and (c) 2.0-25 parts by weight of an ethylene-propylene copolymer rubber having a Mooney viscosity (ML 1+4·100° C.) of 80 according to the JIS K 6300 test and containing 20-70 weight percent propylene.
Claim 4
Independent Claim
190 words
A method of producing printed containers for retortable materials comprising subjecting the outer surfaces of sheets or containers of polyolefin to a flame treatment to produce a wet index of 45 dyne/cm or higher according to the JIS K 6768 test and then printing said outer surfaces, wherein said polyolefin comprises (1) an olefin polymer compound comprising a mixture of (a) 100 parts by weight of a crystalline propylene polymer having a melt flow index of 0.1-100 g/10 min and (b) 3.0-30 parts by weight of an ethylene polymer having a density of 0.925-0.975 g/cc and a melt index of 0.1-20 g/10 min; or (2) an olefin polymer compound comprising a mixture of (a) 100 parts by weight of a crystalline propylene polymer having a melt flow index of 0.1-100 g/10 min, (b) 3.0-30 parts by weight of an ethylene polymer having a density of 0.925 -0.975 g/cc and a melt flow index of 0.1-20 g/10 min, and (c) 2.0-25 parts by weight of an ethylene-propylene copolymer rubber having a Mooney viscosity (ML 1+4·100° C.) of 80 according to the JIS K 6300 test and containing 20-70 weight percent propylene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-24 | 1994-06-25 | 1994-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-24 | 1998-06-25 | 1998-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-24 | 2002-06-25 | 2002-12-25 | $7700.00 | Window Closed / Lapsed |