Patent EP0286430A2 successfully refreshed from Google Patents.
EP0286430A2
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EP
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Flexible stretch/shrink film
Assignee: Cryovac LLC
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Filing: 1988-04-08
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Granted: —
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Expires: 2008-04-08
Abstract
Abstract A multi-layered thermoplastic polyolefin film having an improved combination of physical characteristics is disclosed. In particular, the multi-layered film evidences an improved combination of abuse resistance, elongation, and flexibility. Preferred five layer embodiments of the film comprise (1) a core layer of very low density polyethylene; (2) two adjacent intermediate layers of a linear low density polyethylene and (3) two outer layers of an ethylene vinyl acetate copolymer or very low density polyethylene.
Inventors
- 👤 Vincent Wayne Herran
- 👤 George Dean Wofford
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 12:01
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B2250/00; B32B2250/05; B32B2323/00; B32B2323/04; B32B2323/046; B32B2553/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/26; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A multilayer thermoplastic packaging film having at least five layers comprising (a) a core layer comprising a very low density polyethylene; (b) intermediate layers adjacent each side of the core layer and each comprising a linear low density polyethylene; and (c) two outer layers each bonded to a respective intermediate layer and each comprising a polymeric material selected from the group consisting of: (1) ethylene vinyl acetate copolymer, and (2) very low density polyethylene.
Claim 2
Dependent Claim
74 words
A multilayer thermoplastic packaging film having at least five layers comprising (a) a core layer comprising a very low density polyethylene; (b) intermediate layers adjacent each side of the core layer and each comprising a linear low density polyethylene; and (c) two outer layers each bonded to a respective intermediate layer and each comprising a polymeric material selected from the group consisting of: (1) ethylene vinyl acetate copolymer, and (2) very low density polyethylene.
Claim 3
Dependent Claim
12 words
The film as claimed in claim 1 wherein each layer is cross-linked.
Claim 4
Dependent Claim
21 words
The film as claimed in claim 1 or 2 wherein the two outer layers each comprise an ethylene vinyl acetate copolymer.
Claim 5
Dependent Claim
27 words
The film as claimed in claim 3 having a modulus at 73°F (23°C) of less than about 23500 p.s.i. (162.0 MPa) in the longitudinal and transverse directions.
Claim 6
Dependent Claim
19 words
The film as claimed in claim 1 wherein the two outer layers each comprise a very low density polyethylene.
Claim 7
Dependent Claim
32 words
The film as claimed in claim 5 having a modulus of less than about 17000 p.s.i. (117.2 MPa) in the longitudinal direction and about 13500 p.s.i. (93.1 MPa) in the transverse direction.
Claim 8
Dependent Claim
31 words
The film of claim 5 or 6 having an elongation, at break at 73°F (23°C) of at least about 220% in the longitudinal direction and about 240% in the transverse direction.
References Cited (Backward Citations)
No citation records indexed.
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