EP0010592A1
Expired / Lapsed
EP
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A process for extruding ethylene polymers
Assignee: Union Carbide Corp
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Filing: 1979-09-05
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Granted: —
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Expires: 1999-09-05
Abstract
Abstract A process comprising forming an extrudate, preferably in the form of a film, from an ethylene polymer which melts rapidly and experiences slow shear thinning by melt extruding said polymer through an extruder having an extrusion screw (3) therein with a length (A) to diameter (B) ratio of between about 15:1 to 21:1.
Inventors
- 👤 John Clark Miller
- 👤 Archibald Louis Burnett
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 17:47
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/022; B29C48/25; B29C48/36; B29C48/395; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B29K; B29K2023/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
42 words
A process comprising forming an extrudate from a rapidly melting ethylene polymer which experiences , slow shear thinning by melt extruding said polymer through an extruder having an extrusion screw with a length to diameter ratio of between about 15:1 to 21:1.
Claim 2
Dependent Claim
42 words
A process comprising forming an extrudate from a rapidly melting ethylene polymer which experiences , slow shear thinning by melt extruding said polymer through an extruder having an extrusion screw with a length to diameter ratio of between about 15:1 to 21:1.
Claim 3
Dependent Claim
17 words
A process as in claim 1 in which said ethylene polymer is a hydrocarbon copolymer of ethylene.
Claim 4
Dependent Claim
27 words
A process according to any of the claims 1 to 2 in which ethylene polymer has a density of about 0.91 to 0.94 grams per cubic centimeter.
Claim 5
Dependent Claim
29 words
A process according to any of the claims 1 to 3 in which said ethylene polymer has a melt index of about 0.1 to 10 grams per 10 minutes.
Claim 6
Dependent Claim
26 words
A process according to any of the claims 1 to 4 in which said ethylene polymer has a molecular weight distribution of about 2 to 10.
Claim 7
Dependent Claim
38 words
A process according to any of the claims 1 to 5 in which said ethylene polymer has a melt index of about 0.1 to 5.0 grams per 10 minutes, a molecular weight distribution of about 2 to 4.
Claim 8
Dependent Claim
32 words
A process according to any of the claims 1 to 6 in which said ethylene polymer is a copolymer of ethylene and at least one C 3 to C 8 alpha olefin.
Claim 9
Dependent Claim
34 words
A process as in claim 7 in which said ethylene polymer is a copolymer of ≥90 mol percent ethylene and ≤10 mol percent of at least one C 3 to C 8 alpha olefin.
Claim 10
Dependent Claim
29 words
A process according to any of the claims 7 to 8 in which said ethylene polymer has a total unsaturation content of about >0.1 to ≤0.3 C=C/1000 C atoms.
Claim 11
Dependent Claim
26 words
A process according to any of the claims 7 to 9 in which said ethylene polymer has a melt flow ratio of about >18 to ≤36.
References Cited (Backward Citations)
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