US4906517A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging material for photosensitive materials
Assignee: Fujifilm Holdings Corp
•
Filing: 1988-01-22
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Granted: 1990-03-06
•
Expires: 2008-01-22
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, 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 13:47
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/02; B32B7/027; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/20; B32B27/32; B32B7/04; B32B7/12; G; G03; G03C; G03C3/00; B32B2255/00; B32B2255/10; B32B2255/20; B32B2255/205; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/50; B32B2307/514; B32B2307/70; B32B2307/732; B32B2311/00; B32B2311/24; B32B2323/00; B32B2323/04; B32B2323/043; B32B2323/10; B32B2553/00; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
79 words
A packaging material for photosensitive materials comprising a coextruded multilayer film layer comprising a light-shielding ethylene copolymer resin film layer containing a light-shielding material and a high Young's modulus thermoplastic resin film layer having a Young's modulus of more than 40 kg/mm 2 and a hygroscopicity of less than the light shielding ethylene copolymer resin film layer, and a flexible sheet layer laminated through an adhesive layer on the side of the high Young's modulus thermoplastic resin film layer.
Claim 2
Dependent Claim
79 words
A packaging material for photosensitive materials comprising a coextruded multilayer film layer comprising a light-shielding ethylene copolymer resin film layer containing a light-shielding material and a high Young's modulus thermoplastic resin film layer having a Young's modulus of more than 40 kg/mm 2 and a hygroscopicity of less than the light shielding ethylene copolymer resin film layer, and a flexible sheet layer laminated through an adhesive layer on the side of the high Young's modulus thermoplastic resin film layer.
Claim 3
Dependent Claim
49 words
The packaging material of claim 1 wherein the ethylene copolymer resin of said light-shielding ethylene copolymer resin film layer is selected from the group consisting of linear low density polyethylene resin, ethylene vinyl acetate copolymer resin, ethylene-ethyl acrylate copolymer resin, ethylene-methyl acrylate copolymer resin and ethylene-acrylic acid copolymer resin.
Claim 4
Dependent Claim
34 words
The packaging material of claim 1 wherein the ethylene copolymer resin of said light-shielding ethylene copolymer resin film layer is the linear low density polyethylene resin of which α-olefin is 4-methylpentene-1, hexene-1 or octene-1.
Claim 5
Dependent Claim
22 words
The packaging material of claim 1 wherein said light-shielding ethylene copolymer resin film layer contains carbon black and or another light-shielding material.
Claim 6
Dependent Claim
22 words
The packaging material of claim 1 wherein the thickness of said light-shielding ethylene copolymer resin film layer is thicker than 10 μm.
Claim 7
Dependent Claim
36 words
The packaging material of claim 1 wherein said high Young's modulus thermoplastic resin film layer is a polyolefin resin film layer, a polyester resin film layer or a polyamide resin film layer, containing a light-shielding material.
Claim 8
Dependent Claim
52 words
The packaging material of claim 1 wherein the thermoplastic resin of said high Young's modulus thermoplastic resin film layer is selected from the group consisting of linear low density polyethylene resin, low density polyethylene resin, high density polyethylene resin and polypropylene resin, having a density of higher than 0.930 g/cm 3 .
Claim 9
Dependent Claim
22 words
The packaging material of claim 1 wherein the thermoplastic resin of said high Young's modulus thermoplastic resin film layer is polypropylene resin.
Claim 10
Dependent Claim
28 words
The packaging material of claim 2 wherein the content of a light-shielding material of said high Young's modulus thermoplastic resin film layer is 0.1 to 20 wt. %.
Claim 11
Dependent Claim
22 words
The packaging material of claim 2 wherein said high Young's modulus thermoplastic resin film layer contains a white or light yellow pigment.
Claim 12
Dependent Claim
23 words
The packaging material of claim 1 wherein the thickness of said high Young's modulus thermoplastic resin film layer is thicker than 10 μm.
Claim 13
Dependent Claim
20 words
The packaging material of claim 1 wherein the thickness of said coextruded multilayer film layer is greater than 35 μm.
Claim 14
Dependent Claim
21 words
The packaging material of claim 1 wherein said flexible sheet layer is an uniaxially or biaxially stretched thermoplastic resin film layer.
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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) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |