Patent US4331725A successfully refreshed from Google Patents.
US4331725A
Expired / Lapsed
US
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Wrapping materials
Assignee: Fujifilm Holdings Corp
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Filing: 1981-06-17
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Granted: 1982-05-25
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Expires: 2001-06-17
Abstract
Abstract A wrapping material, which has excellent physical strength and which is suitable for use in making a bag, comprising two uniaxially-stretched thermoplastic resin films which are disposed in such a manner that the stretching directions of the two films intersect each other at an angle of 45° to 90° and an adhesive layer sandwiched between the two films wherein the adhesive layer has a plurality of holes perforating the adhesive layer in the form of a net.
Inventors
- 👤 Mutsuo Akao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:16
CPC Classifications
B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/32; B32B37/00; B32B37/12; B32B37/1207; B32B2037/1215; B32B2250/00; B32B2250/03; B32B2250/40; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/516; B32B2323/00; B32B2323/04; B32B2323/043; B32B2553/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249981; Y10T428/249982; Y10T428/249984; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/249993
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
66 words
A wrapping material comprising at least (1) two uniaxially-stretched thermoplastic resin films which are disposed in such a manner that the stretching directions of the two films intersect each other at an angle of 45° to 90° and (2) an adhesive layer sandwiched between the two films wherein the adhesive layer has a plurality of holes perforating the adhesive layer in the form of a net.
Claim 2
Dependent Claim
66 words
A wrapping material comprising at least (1) two uniaxially-stretched thermoplastic resin films which are disposed in such a manner that the stretching directions of the two films intersect each other at an angle of 45° to 90° and (2) an adhesive layer sandwiched between the two films wherein the adhesive layer has a plurality of holes perforating the adhesive layer in the form of a net.
Claim 3
Dependent Claim
36 words
A wrapping material as in claim 1 additionally comprising an adhesive layer without holes sandwiched between one of the two films and the adhesive layer having a plurality of holes in the form of a net.
Claim 4
Dependent Claim
34 words
A wrapping material as in claim 2 additionally comprising a flexible sheet sandwiched between the adhesive layer having a plurality of holes in the form of a net and the adhesive layer without holes.
Claim 5
Dependent Claim
85 words
A wrapping material as in claim 1 comprising the following laminate: (a) an uniaxially stretched thermoplastic resin film; (b) an adhesive layer having a plurality of holes in the form of a net; (c) a flexible sheet; (d) an adhesive layer having a plurality of holes in the form of a net; and (e) an uniaxially-stretched thermoplastic resin film disposed in such a manner that the stretching directions of the two films (a) and (e) intersect each other at an angle of 45° to 90°.
Claim 6
Dependent Claim
18 words
A wrapping material as in claim 1, wherein the uniaxially-stretched thermoplastic resin film is a polyolefin resin film.
Claim 7
Dependent Claim
27 words
A wrapping material as in claim 5, wherein the polyolefin resin film is a high density polyethylene film having a density of 0.94 g/cm 3 or more.
Claim 8
Dependent Claim
31 words
A wrapping material as in claim 1, wherein the adhesive layer having a plurality of holes in the form of a net has a space ratio of about 5 to 90%.
Claim 9
Dependent Claim
41 words
A wrapping material as in claim 1, wherein the adhesive layer having a plurality of holes in the form of a net is formed by extrusion coating after adding a foaming agent to a thermoplastic resin or a hot melt adhesive.
Claim 10
Dependent Claim
24 words
A wrapping material as in claim 8, wherein water is added as a foaming agent in an amount of 0.1 to 10% by weight.
Claim 11
Dependent Claim
60 words
A wrapping material as in claim 3 or 4, wherein one of the uniaxially-stretched film, the adhesive layer having a plurality of holes in the form of a net, the adhesive layer without holes, and the flexible sheet contains therein at least one of (i) an antistatic agent, (ii) an light-shielding agent, (iii) a slip agent, and (iv) an antioxidant.
Claim 12
Dependent Claim
56 words
A wrapping material as in claim 1, 5, 6, 7, 8 or 9, wherein one of the uniaxially-stretched film and the adhesive layer having a plurality of holes in the form of a net contains therein at least one of (i) an antistatic agent, (ii) a light-shielding agent, (iii) a slip agent, and (iv) an antioxidant.
Claim 13
Dependent Claim
55 words
A wrapping material as in claim 2, wherein one of the uniaxially-stretched film, the adhesive layer having a plurality of holes in the form of a net and the adhesive layer without holes contains therein at least one of (i) an antistatic agent, (ii) a light-shielding agent, (iii) a slip agent, and (iv) an antioxidant.
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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |