US4386124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrapping materials
Assignee: Fujifilm Holdings Corp
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Filing: 1981-08-05
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Granted: 1983-05-31
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Expires: 2001-08-05
Abstract
Abstract A wrapping material is provided, which comprises two mono-axially stretched thermoplastic resin films, placed in such a manner that the stretching axes of the thermoplastic resin films cross each other at an angle of 45° to 90°, and an adhesive layer comprising an ethylene-ethyl acrylate copolymer resin sandwiched therebetween. This wrapping material has good physical strength and is suitable for use in the preparation of bags.
Inventors
- 👤 Mutsuo Akao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:22
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/03; B32B7/035; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B7/04; B32B7/12; B32B2307/00; B32B2307/20; B32B2307/21; B32B2307/50; B32B2307/514; B32B2307/516; B32B2439/00; B32B2439/40; B32B2439/46; Y; Y10; Y10S; Y10S383/00; Y10S383/908; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31507; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891; Y10T428/31909; Y10T428/31913; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
A wrapping material, comprising: first and second mono-axially stretched thermoplastic resin films on both surfaces thereof, said films laminated in such a manner that the stretching axes of the mono-axially stretched thermoplastic resin films cross each other at an angle of 45° to 90°; and an adhesive layer consisting essentially of an ethylene-ethyl acrylate copolymer resin or an ethylene-ethyl acrylate copolymer resin and light-shielding substances, which ethylene-ethyl acrylate copolymer resin has an ethylene/ethyl acrylate copolymerizing ratio of about 95/5 to about 65/35 by weight, a molecular weight of about 15,000 to about 45,000, a Vicant softening point of about 40° C. to about 80° C. and a melt index of about 1 g/10 min to about 20 g/10 min, sandwiched between said first and second films.
Claim 2
Dependent Claim
126 words
A wrapping material, comprising: first and second mono-axially stretched thermoplastic resin films on both surfaces thereof, said films laminated in such a manner that the stretching axes of the mono-axially stretched thermoplastic resin films cross each other at an angle of 45° to 90°; and an adhesive layer consisting essentially of an ethylene-ethyl acrylate copolymer resin or an ethylene-ethyl acrylate copolymer resin and light-shielding substances, which ethylene-ethyl acrylate copolymer resin has an ethylene/ethyl acrylate copolymerizing ratio of about 95/5 to about 65/35 by weight, a molecular weight of about 15,000 to about 45,000, a Vicant softening point of about 40° C. to about 80° C. and a melt index of about 1 g/10 min to about 20 g/10 min, sandwiched between said first and second films.
Claim 3
Dependent Claim
20 words
The wrapping material as claimed in claim 1, wherein the mono-axially stretched thermoplastic resin films are a polyolefin resin films.
Claim 4
Dependent Claim
28 words
The wrapping material as claimed in claim 2, wherein the polyolefin resin films are a high density polyethylene film having a density of 0.94 g/cm 3 or more.
Claim 5
Dependent Claim
28 words
The wrapping material as claimed in claim 1, wherein the thickness of the adhesive layer comprising an ethylene-ethyl acrylate copolymer resin is from about 5μ to about 30μ.
Claim 6
Dependent Claim
34 words
The wrapping material as claimed in any of claim 1, 2, 3, or 4, wherein the thickness of the adhesive layer comprising an ethylene-ethyl acrylate copolymer resin is from about 7μ to about 15μ.
Claim 7
Dependent Claim
139 words
A wrapping material having an improved antistatic property for wrapping a light-sensitive article, said wrapping material comprising: first and second mono-axially stretched thermoplastic resin films on both surfaces thereof, said films laminated in such a manner that the stretching axes of the mono-axially stretched theremoplstic resin films cross each other at an angle of 45° to 90°; and an adhesive layer consisting essentially of an ethylene-ethyl acrylate copolymer resin or an ethylene-ethyl acrylate copolymer resin and light-shielding substances, which ethylene-ethyl acrylate copolymer resin has an ethylene/ethyl acrylate copolymerizing ratio of about 95/5 to about 65/35 by weight, a molecular weight of about 15,000 to about 45,000, a Vicant softening point of about 40° C. to about 80° C. and a melt index of about 1 g/10 min to about 20 g/10 min, sandwiched between said first and second films.
Claim 8
Dependent Claim
139 words
A wrapping material having an improved antistatic property for wrapping a light-sensitive article, said wrapping material comprising: first and second mono-axially stretched thermoplastic resin films on both surfaces thereof, said films laminated in such a manner that the stretching axes of the mono-axially stretched theremoplstic resin films cross each other at an angle of 45° to 90°; and an adhesive layer consisting essentially of an ethylene-ethyl acrylate copolymer resin or an ethylene-ethyl acrylate copolymer resin and light-shielding substances, which ethylene-ethyl acrylate copolymer resin has an ethylene/ethyl acrylate copolymerizing ratio of about 95/5 to about 65/35 by weight, a molecular weight of about 15,000 to about 45,000, a Vicant softening point of about 40° C. to about 80° C. and a melt index of about 1 g/10 min to about 20 g/10 min, sandwiched between said first and second films.
Claim 9
Dependent Claim
142 words
A bag for wrapping light-sensitive material made of a wrapping material having an improved anti-static property, said wrapping material comprising: first and second mono-axially stretched theremoplastic resin films on both surfaces thereof, said films laminated in such a manner that the stretching axes of the mono-axially stretched thermoplastic resin films cross each other at an angle of 45° to 90°; and an adhesive layer consisting essentially of an ethylene-ethyl acrylate copolymer resin or an ethylene-ethyl acrylate copolymer resin and light-shielding substances, which ethylene-ethyl acrylate copolymer resin has an ethylene/ethyl acrylate copolymerizing ratio of about 95/5 to about 65/35 by weight, a molecular weight of about 15,000 to about 45,000, a Vicant softening point of about 40° C. to about 80° C. and a melt index of about 1 g/10 min to about 20 g/10 min, sandwiched between said first and second films.
Claim 10
Dependent Claim
142 words
A bag for wrapping light-sensitive material made of a wrapping material having an improved anti-static property, said wrapping material comprising: first and second mono-axially stretched theremoplastic resin films on both surfaces thereof, said films laminated in such a manner that the stretching axes of the mono-axially stretched thermoplastic resin films cross each other at an angle of 45° to 90°; and an adhesive layer consisting essentially of an ethylene-ethyl acrylate copolymer resin or an ethylene-ethyl acrylate copolymer resin and light-shielding substances, which ethylene-ethyl acrylate copolymer resin has an ethylene/ethyl acrylate copolymerizing ratio of about 95/5 to about 65/35 by weight, a molecular weight of about 15,000 to about 45,000, a Vicant softening point of about 40° C. to about 80° C. and a melt index of about 1 g/10 min to about 20 g/10 min, sandwiched between said first and second films.
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) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |