Patent JPS574074A successfully refreshed from Google Patents.
EP0247897A1
Expired / Lapsed
EP
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Sealable films
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1987-05-29
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Granted: —
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Expires: 2007-05-29
Abstract
Abstract A sealable film having superior seal strength comprising a base layer comprising a polyolefin, e.g. polypropylene, said layer having on at least one surface thereof l to 20 weight % of a film layer comprising a linear polyethylene of density between 0.875 and 0.9l5 gm/cc and comprises less than 96 mol % by weight of ethylene.
Inventors
- 👤 Bernhard Louis Luc Bossaert
- 👤 Stefan Bertil Ohlsson
- 👤 William F.M.J. Willems
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 14:58
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/08; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2323/00; B32B2323/04; B32B2323/046; B32B2323/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
A sealable film comprising a base layer which comprises a polyolefin, said layer having on at least one surface thereof l to 20 weight % based on the weight of the base layer, of a film layer comprising a linear low density polyethylene containing less than 96 mol % ethylene and of density between 0.875 and 0.9l5 grams/cc.
Claim 2
Dependent Claim
58 words
A sealable film comprising a base layer which comprises a polyolefin, said layer having on at least one surface thereof l to 20 weight % based on the weight of the base layer, of a film layer comprising a linear low density polyethylene containing less than 96 mol % ethylene and of density between 0.875 and 0.9l5 grams/cc.
Claim 3
Dependent Claim
31 words
A film according to claim l wherein the polyolefin in the base layer is a polymer of a mono alpha olefin containing 2 to 4 carbon atoms per molecule, preferably polypropylene.
Claim 4
Dependent Claim
45 words
A film according to claim 2 wherein the polypropylene is an isotactic polypropylene with a density of from 0l.86 to 0.92 g/cc and a melt flow index of from l to l5 g/l0 min as determined according to ASTM Dl238 (conditions 230°C and 2.l6 kg).
Claim 5
Dependent Claim
44 words
A film according to any one of the preceding claims wherein the base layer has on each surface l to l0 weight per cent based on the base layer of the film comprising linear low density polyethylene of density between 0.875 and 0.9l5 grams/cc.
Claim 6
Dependent Claim
45 words
A film according to any one of the preceding claims wherein the very low density polyethylene is a linear copolymer of ethylene and butene, hexene or octene having a density of from 0.900 to 0.9l5 and comprising at least 92 mol per cent of ethylene.
Claim 7
Dependent Claim
14 words
A film according to any one of the preceding claims which is biaxially orientated.
Claim 8
Dependent Claim
33 words
A film according to any one of the preceding claims which is l0 to 60 microns thick and wherein the thickness of the or each outer film layer is 0.05 to 2.5 microns.
References Cited (Backward Citations)
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