Patent US5110643A successfully refreshed from Google Patents.
US5110643A
Expired / Lapsed
US
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Packaging material for photosensitive materials
Assignee: Fujifilm Holdings Corp
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Filing: 1989-12-04
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Granted: 1992-05-05
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Expires: 2009-12-04
Abstract
Abstract The packaging materials for photosensitive materials having particular coextruded multilayers and a flexible sheet. According to the composition, the packaging material is excellent in curl resistance, in physical strength particularly tear strength or in tearability by hand. These packaging materials have various properties necessary for packaging photosensitive materials, and are excellent in bag-making ability for automatic bag-making machine.
Inventors
- 👤 Mutsuo Akao
- 👤 Takuichi Komatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:10
CPC Classifications
G; G03; G03C; G03C3/00; B; B32; B32B; B32B27/00; B32B27/32; B32B7/00; B32B7/02; B32B7/027; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1359; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/31504; Y10T428/31786; Y10T428/3179; Y10T428/31797
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
127 words
A packaging material for photosensitive materials comprising a coextruded multilayer film layer having a Young's modulus in longitudinal direction of more than 40 kg/mm 2 comprising a polyolefin resin film layer having a density of 0.941 to 0.970 g/cm 3 , a melt index of 0.1 to 5 g/10 minutes and a Young's modulus in longitudinal direction of more than 50 kg/mm 2 and a ethylene copolymer resin film layer having a density of 0.870 to 0.939 g/cm 3 and a melt index of 0.1 to 15 g/10 minutes, a metallized flexible sheet layer laminated on said coextruded multilayer film layer, and a flexible sheet layer laminated on said metallized flexible sheet layer,and said polyolefin resin film layer is located on the side of a packaged product.
Claim 2
Dependent Claim
127 words
A packaging material for photosensitive materials comprising a coextruded multilayer film layer having a Young's modulus in longitudinal direction of more than 40 kg/mm 2 comprising a polyolefin resin film layer having a density of 0.941 to 0.970 g/cm 3 , a melt index of 0.1 to 5 g/10 minutes and a Young's modulus in longitudinal direction of more than 50 kg/mm 2 and a ethylene copolymer resin film layer having a density of 0.870 to 0.939 g/cm 3 and a melt index of 0.1 to 15 g/10 minutes, a metallized flexible sheet layer laminated on said coextruded multilayer film layer, and a flexible sheet layer laminated on said metallized flexible sheet layer,and said polyolefin resin film layer is located on the side of a packaged product.
Claim 3
Dependent Claim
20 words
The packaging material of claim 1 wherein the thickness of said coextruded multilayer film layer is 30 to 150 μm.
Claim 4
Dependent Claim
46 words
The packaging material of claim 1 wherein the thickness of said polyolefin resin film layer is 30 to 70% of the coextruded multilayer film layer and the thickness of said ethylene copolymer resin film layer is 70 to 30% of the said coextruded multilayer film layer.
Claim 5
Dependent Claim
24 words
The packaging material of claim 1 wherein said metallized flexible sheet layer is an aluminum metallized uniaxially or biaxially oriented thermoplastic resin film layer.
Claim 6
Dependent Claim
23 words
The packaging material of claim 1 wherein the heat resistances of said flexible sheet layer is higher than said polyolefin resin film layer.
Claim 7
Dependent Claim
34 words
The packaging material of claim 1 wherein said flexible sheet layer is selected from the group consisting of a white or light color, paper, synthetic paper, nonwoven fabric and molecularly oriented thermoplastic resin films.
Claim 8
Dependent Claim
16 words
The packaging material of claim 1 which contains 0.5 to 50 g/m 2 of light-shielding material.
Claim 9
Dependent Claim
20 words
The packaging material of claim 7 wherein the mean particle size of said light-shielding material is less than 200 mμ.
Claim 10
Dependent Claim
91 words
A packaging material comprising a coextruded multilayer film layer comprising a high density high crystallinity polyethylene resin film layer having a melt index of 0.2 to 4 g/10 minutes and a density of more than 0.941 g/cm 3 and a ethylene copolymer resin film layer having a melt index of higher than said polyethylene resin film layer and a density of lower than said polyethylene resin film layer, and a biaxially stretched thermoplastic resin film layer having a thickness of 7 to 60 μm laminated on said coextruded multilayer film layer.
Claim 11
Dependent Claim
91 words
A packaging material comprising a coextruded multilayer film layer comprising a high density high crystallinity polyethylene resin film layer having a melt index of 0.2 to 4 g/10 minutes and a density of more than 0.941 g/cm 3 and a ethylene copolymer resin film layer having a melt index of higher than said polyethylene resin film layer and a density of lower than said polyethylene resin film layer, and a biaxially stretched thermoplastic resin film layer having a thickness of 7 to 60 μm laminated on said coextruded multilayer film layer.
Claim 12
Dependent Claim
33 words
The packaging material of claim 9 wherein the resin composing said high density high crystallinity polyethylene resin film layer is a mixture of high density polyethylene resin and linear low density polyethylene resin.
Claim 13
Dependent Claim
22 words
The packaging material of claim 9 wherein the resin composing said ethylene copolymer resin film layer is linear low density polyethylene resin.
Claim 14
Dependent Claim
72 words
The packaging material of claim 9 wherein the resin composing said biaxially stretched thermoplastic resin film layer is selected from the group consisting of polyester resin, polyamide resin, polyethylene resin, polystyrene resin, polypropylene resin, polyvinyl chloride resin, polyvinylidene chloride resin, polyvinyl alcohol resin, binary and more copolymer resins of a monomer of the above resins and other monomers being random and block and blended resins of the above resins and other resins.
Claim 15
Dependent Claim
17 words
The packaging material of claim 9 which contain 0.5 to 50 g/m 3 of a light-shielding material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-05 | 1995-11-04 | 1996-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-05 | 1999-11-04 | 2000-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-05 | 2003-11-04 | 2004-05-05 | $7700.00 | Window Closed / Lapsed |