Patent US4909975A successfully refreshed from Google Patents.
US4909975A
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US
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Fine denier fibers of olefin polymers
Assignee: DIAMOND TECHNOLOGY PARTNERSHIP Co
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Filing: 1989-02-01
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Granted: 1990-03-20
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Expires: 2009-02-01
Abstract
Abstract Fine denier fibers and/or multi-filaments prepared from linear low density polyethylene copolymers (LLDPE) are found to offer advantages over other forms of polyolefins.
Inventors
- 👤 Lawrence H. Sawyer
- 👤 George W. Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:03
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/30; C; C08; C08L; C08L2203/00; C08L2203/12; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/298; Y10T442/00; Y10T442/60; Y10T442/68
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
116 words
A method of forming ethylene copolymer fibers by extruding the ethylene copolymer at a temperature above its melting point through filament-forming dies to form a filaments of the ethylene copolymer, melt-drawing the filaments to form fibers, and collecting the fibers, wherein the ethylene copolymer comprises a linear copolymer of ethylene and from about 1% to about 30% of at least one ethylenically unsaturated alpha-olefin of C 3 to C 12 carbon atoms, said copolymer having a melt flow value in the range of about 0.01 to about 400 gms/10 min. and a density in the range of about 0.86 to about 0.95 gms/cc, whereby the melt-drawing of the filaments to form fibers produces fine denier fibers.
Claim 2
Independent Claim
116 words
A method of forming ethylene copolymer fibers by extruding the ethylene copolymer at a temperature above its melting point through filament-forming dies to form a filaments of the ethylene copolymer, melt-drawing the filaments to form fibers, and collecting the fibers, wherein the ethylene copolymer comprises a linear copolymer of ethylene and from about 1% to about 30% of at least one ethylenically unsaturated alpha-olefin of C 3 to C 12 carbon atoms, said copolymer having a melt flow value in the range of about 0.01 to about 400 gms/10 min. and a density in the range of about 0.86 to about 0.95 gms/cc, whereby the melt-drawing of the filaments to form fibers produces fine denier fibers.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the copolymer has a density in the range of about 0.90 to about 0.94 gms/cc.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein the copolymer has a melt flow value in the range of about 6 to about 300 gms/10 min.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the alphaolefin comprises at least one in the range of C 4 -C 8 .
Claim 6
Dependent Claim
24 words
The method of claim 1 wherein the copolymer has a melt flow value in the range of about 6 to about 50 grams/ten minutes.
Claim 7
Dependent Claim
30 words
The method of claim 1 wherein the copolymer has a melt flow value in the range of about 6 to about 50 grams/ten minutes and wherein the alpha-olefin comprises 1-octene.
Claim 8
Dependent Claim
13 words
The method of claim 1 wherein the fibers are collected as fiber bundles.
Claim 9
Dependent Claim
21 words
The method of claim 1 wherein the meltdrawn fibers are given additional cold-draw to reduce the denier size of the fibers.
Claim 10
Dependent Claim
13 words
The method of claim 1 wherein the fibers are drawn to sub-denier sizes.
Claim 11
Dependent Claim
14 words
The method of claim 1 wherein the fibers are collected as a bondable web.
Claim 12
Dependent Claim
82 words
The process comprising extruding molten LLDPE as molten filaments and melt-drawing the filaments to fine denier size, then cooling and collecting the fine denier fibers, wherein the LLDPE comprises a linear copolymer of ethylene and from about 1% to about 30% of at least one ethylenically unsaturated alpha-olefin having 3-12 carbons, said copolymer having a melt flow value in the range of about 0.1 to about 400 gms/10 min and a density in the range of about 0.86 to about 0.95 g/cc.
Claim 13
Dependent Claim
82 words
The process comprising extruding molten LLDPE as molten filaments and melt-drawing the filaments to fine denier size, then cooling and collecting the fine denier fibers, wherein the LLDPE comprises a linear copolymer of ethylene and from about 1% to about 30% of at least one ethylenically unsaturated alpha-olefin having 3-12 carbons, said copolymer having a melt flow value in the range of about 0.1 to about 400 gms/10 min and a density in the range of about 0.86 to about 0.95 g/cc.
Claim 14
Dependent Claim
21 words
The method of claim 11 wherein the copolymer has a density in the range of about 0.90 to about 0.94 gms/cc.
Claim 15
Dependent Claim
24 words
The method of claim 11 wherein the copolymer has a melt flow value in the range of about 6 to about 300 gms/10 min.
Claim 16
Dependent Claim
21 words
The method of claim 11 wherein the alpha-olefin comprises at least one in the range of C 4 -C 8 .
Claim 17
Dependent Claim
24 words
The method of claim 11 wherein the copolymer has a melt flow value in the range of about 6 to about 50 grams/ten minutes.
Claim 18
Dependent Claim
30 words
The method of claim 11 wherein the copolymer has a melt flow value in the range of about 6 to about 50 grams/ten minutes and wherein the alpha-olefin comprises 1-octene.
Claim 19
Dependent Claim
13 words
The method of claim 11 wherein the fibers are collected as fiber bundles.
Claim 20
Dependent Claim
21 words
The method of claim 11 wherein the melt-drawn fibers are given additional cold-draw to reduce the denier size of the fibers.
Claim 21
Dependent Claim
13 words
The method of claim 11 wherein the fibers are drawn to sub-denier sizes.
Claim 22
Dependent Claim
14 words
The method of claim 11 wherein the fibers are collected as a bondable web.
References Cited (Backward Citations)
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