EP0444340A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Film having metallizable surface
Assignee: Mobil Oil AS
•
Filing: 1990-03-02
•
Granted: —
•
Expires: 2010-03-02
Abstract
Abstract An oriented, heat sealable polypropylene film is provided having a metallizable surface. The film includes a core layer derived from isotactic polypropylene containing an effective amount of adhesion promoting agent. A copolyester layer is bonded to the core layer, the adhesion promoting agent protecting against the delamination thereof. A heat sealable layer formed from an ethylene-propylene random copolymer is bonded to the opposite side of the core layer. The film is formed as a coextrudate and is biaxially oriented.
Inventors
- 👤 Eldridge Milford Mount, Iii
- 👤 Alan James Benedict
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 13:52
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/32; B32B27/36; B32B38/00; B32B38/0012; B32B2038/0028; B32B2255/00; B32B2255/10; B32B2255/20; B32B2255/205; B32B2255/26; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/50; B32B2307/514; B32B2307/518; B32B2307/70; B32B2307/702; B32B2323/00; B32B2323/10; B32B2367/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
44 words
A metallizable, oriented plastics film which comprises: (i) a core layer comprising an isotactic polypropylene; (ii) a coextruded copolyester layer bonded to one side of the core layer; and (iii) a coextruded heat sealable layer bonded to the opposite side of the core layer.
Claim 2
Dependent Claim
44 words
A metallizable, oriented plastics film which comprises: (i) a core layer comprising an isotactic polypropylene; (ii) a coextruded copolyester layer bonded to one side of the core layer; and (iii) a coextruded heat sealable layer bonded to the opposite side of the core layer.
Claim 3
Dependent Claim
16 words
A film according to claim 1 wherein the core layer (i) comprises an adhesion promoting agent.
Claim 4
Dependent Claim
16 words
A film acording to claim 1 or 2 wherein the copolyester comprising layer (ii) is amorphous.
Claim 5
Dependent Claim
16 words
A film according to any preceding claim wherein the copolyester layer (ii) comprises ethylene-1, 4-cyclohexylene-dimethylene terephthalate.
Claim 6
Dependent Claim
18 words
A film according to any preceding claim wherein the copolyester layer (ii) is subjected to corona discharge treatment.
Claim 7
Dependent Claim
19 words
A film according to any preceding claim which comprises a vinylidene chloride copolymer coating upon the copolyester layer (ii).
Claim 8
Dependent Claim
17 words
A film according to claim 1 wherein the coextruded sealable layer (iii) comprises an ethylene-propylene random copolymer.
Claim 9
Dependent Claim
19 words
A film according to claim 1 or 7 wherein the coextruded heat sealable layer (iii) comprises an anti-blocking agent.
Claim 10
Dependent Claim
10 words
A film according to claim 1 which is biaxially oriented.
Claim 11
Dependent Claim
18 words
A film according to claim 1 which is stretched from four to eight times in the longitudinal direction.
Claim 12
Dependent Claim
19 words
A film according to any preceding claim which is stretched from seven to nine times in the transverse direction.
Claim 13
Dependent Claim
26 words
A metal coated, oriented plastics film which comprises a film according to any preceding claim having (iv) a metal coating upon the coextruded copolyester layer (ii)
Claim 14
Dependent Claim
18 words
Use of a copolyester layer (ii) in bonding a metal coating (iv) to a polypropylene core layer (i).
Claim 15
Dependent Claim
18 words
Use of a copolyester layer (ii) in bonding a metal coating (iv) to a polypropylene core layer (i).
References Cited (Backward Citations)
EP0096581A1
Cited
US4493872A
Cited
EP0153081A2
Cited
EP0220620A2
Cited
EP0282917A2
Cited
FR2618726A1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.