Patent EP0552810A2 successfully refreshed from Google Patents.
EP0552810A2
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EP
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Resilient, high shrinkage propylene polymer yarn and articles made therefrom
Assignee: Basell North America Inc
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Filing: 1993-01-23
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Granted: —
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Expires: 2013-01-23
Abstract
Abstract Resilient yarn produced from fibers of propylene polymer material. More particularly, the invention relates to yarn and pile fabric such as carpeting made therefrom, in which the fiber is a propylene terpolymer or copolymer and mixtures thereof. Specifically, it relates to yarn produced from propylene polymer compositions based on terpolymers of propylene with ethylene and C₄-C₈ alpha-olefin; compositions of copolymers of propylene with C₄-C₈ alpha-olefin together with copolymers of propylene and ethylene or terpolymers of propylene-ethylene-C₄-C₈ alpha-olefin; compositions of terpolymers of propylene, ethylene and C₄-C₈ alpha-olefin in combination with copolymers of propylene and C₄-C₈ alpha-olefin as well as copolymers of ethylene and C₄-C₈ alpha-olefin; random crystalline propylene copolymers with ethylene or a C₄-C₈ alpha-olefin as well as such compositions containing elastomeric propylene copolymers. In particular, the invention relates to yarn produced from blends of such copolymers and terpolymers and compositions with crystalline polypropylene homopolymer.
Inventors
- 👤 Luciano Clementini
- 👤 Adam F. Galambos
- 👤 Lesca Giuseppe
- 👤 Kumar Ogale
- 👤 Leonardo Spagnoli
- 👤 Michael E. Starsinic
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 12:30
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/32; D01; D01F; D01F6/00; D01F6/28; D01F6/30; Y; Y10; Y10S; Y10S526/00; Y10S526/916; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2915; Y10T428/2973
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
365 words
Polyolefin yarn capable of increased resiliency and shrinkage comprising continuous strand of multiple monofilament fibers or staple fibers of propylene polymer material optionally blended with polypropylene homopolymer, said propylene polymer material selected from the group consisting of, amounts expressed as weight %: (I) (a) random crystalline terpolymer consisting essentially of from about 96.0% to about 85.0% of propylene, from about 1.5% to about 5.0% of ethylene and from about 2.5% to about 10.0% of an olefin selected from the group consisting of C₄-C₈ alpha-olefins; and (b) compositions of random crystalline propylene polymers comprising: (1) from about 30 to about 65% of a copolymer of from about 80 to about 98% propylene with a C₄-C₈ alpha-olefin; and (2) from about 35 to about 70% of a copolymer of propylene and ethylene and optionally from about 2 to about 10% of a C₄-C₈ alpha-olefin; said copolymer containing from about 2 to about 10% ethylene when said C₄-C₈ alpha-olefin is not present and from about 0.5 to about 5% ethylene when said C₄-C₈ alpha-olefin is present; and (c) compositions of random crystalline propylene polymers in combination with a predominantly ethylene copolymer consisting essentially of: (1) about 15-35% of a terpolymer of from about 90-93% propylene and about 2-3.5% ethylene and about 5-6% C₄-C₈ alpha-olefin; and (2) about 30-75% of a copolymer of from about 80-90%, propylene with a C₄-C₈ alpha-olefin; and (3) about 20-60% of a copolymer of from about 91-95% ethylene with a C₄-C₈ alpha-olefin; and (d) random crystalline propylene polymer comprising from about 1.5 to about 20.0 weight percent ethylene or a C₄-C₈ alpha-olefin; and blends of (a), (b), (c) or (d); or (II) (a) 90-55 parts polypropylene homopolymer having an isotactic index greater than 90 and/or crystalline copolymer of propylene with (i) ethylene and/or (ii) an α-olefin of formula CH₂=CHR, where R is a C₂-C₆ alkyl radical, comprising less than 10% of ethylene and/or α-olefin; and (b) 10-45 parts of an elastomeric copolymer of propylene with comonomers of ethylene and/or an α-olefin of formula CH₂=CHR, where R is a C₂-C₆ alkyl radical containing from 50 to 70 parts by weight of comonomers, and from 10 to 40% by weight insoluble in xylene at ambient temperature.
Claim 2
Dependent Claim
45 words
The yarn of claim 1 comprising from about 50 to about 250 fibers, said fibers twisted together, bulked and heat set to form a carpet yarn, and having particularly from about 0.5 to about 6.0 twists per linear inch, wherein said fibers are particularly pigmented.
Claim 3
Dependent Claim
43 words
The yarn of claim 2 wherein the cross-section of each of said fibers is substantially round or n-lobal wherein n is an integer of at least 2, said n-lobal cross-section fiber contains particularly a cavity in each lobe of substantially equal cross-section therein.
Claim 4
Dependent Claim
9 words
The yarn of claim 2 further comprising polypropylene homopolymer.
Claim 5
Dependent Claim
78 words
The yarn of claim 2 wherein said propylene polymer material is (a) and includes from about 91.7 to about 93.3 weight % propylene and from about 2.2 to about 2.7 weight % of ethylene and from about 4.5 to about 5.6 weight % butene-1 wherein said propylene polymer material is particularly a component of a blend further comprising up to about 70 weight % polypropylene homopolymer based on the total weight of propylene polymer material and polypropylene homopolymer.
Claim 6
Dependent Claim
41 words
The yarn or claim 5 wherein said homopolymer polypropylene is present at a concentration of from about 10 to about 70 weight % and wherein said blend has been visbroken to a melt flow rate of from about 5 to 100.
Claim 7
Dependent Claim
31 words
A polyolefin pile fabric of increased resiliency and appearance retention comprising a backing and yarn secured to said backing and extending outwardly therefrom, as claimed in any one of claims 1-6.
Claim 8
Dependent Claim
20 words
The pile fabric of claim 7 wherein said backing comprises a scrim having needled thereto a web of staple fibers.
Claim 9
Dependent Claim
49 words
The pile fabric of claims 4-7 wherein said pile is formed by yarn tufts extending from said backing and forming a fabric face, further including a backsizing coating, said coating serving to lock substantially each said yarn tuft into said fabric backing, wherein said tufts are preferably yarn loops.
Claim 10
Dependent Claim
15 words
The pile fabric of claims 7-9 including a secondary backing layer secured to said fabric.
Claim 11
Dependent Claim
35 words
A material selected from the group consisting of woven textile, nonwoven textile and geotextile prepared from a polyolefin fiber or yarn capable of increased resiliency and shrinkage as claimed in any one of claims 1-6.
Claim 12
Dependent Claim
100 words
Thermoshrinkable fibers of claim 1 comprising, by weight: (a) 80-60 parts polypropylene homopolymer having an isotactic index greater than 90 and/or crystalline copolymer of propylene with (i) ethylene and/or (ii) an α-olefin of formula CH₂=CHR, where R is a C₂-C₆ alkyl radical, comprising less than 10% of ethylene and/or α-olefin; and (b) 20-40 parts of an elastomeric copolymer of propylene with comonomers of ethylene and/or an α-olefin of formula CH₂=CHR, where R is a C₂-C₆ alkyl radical containing from 50 to 70 parts by weight of comonomers, and from 10 to 40% by weight insoluble in xylene at ambient temperature.
Claim 13
Dependent Claim
27 words
Polyolefin continuous or staple yarn that, when utilized in a carpet product is capable of twist retention according to Test Method A, greater than about 30 percent.
Claim 14
Dependent Claim
57 words
Polyolefin continuous or staple yarn that, when utilized in a carpet product, has a shrinkage response during heat setting of at least about 15 percent at 143°C, wherein said shrinkage is preferably obtained on yarn which has been plied and bulked and preferably exceeds the shrinkage of isotactic polypropylene homopolymer yarn by at least about ten percent.
Claim 15
Dependent Claim
15 words
The yarn of claim 14 consisting essentially of carpet fibers or substantially uniform shrinkage properties.
Claim 16
Dependent Claim
15 words
The yarn of claim 13 or 14 Wherein said yarn comprises a propylene polymer composition.
Claim 17
Dependent Claim
67 words
A saxony carpet comprising a primary backing and twisted, evenly sheared, heat-set pile yarn, said yarn being in the form of individual lengths of plied yarn or tufts, each of which is attached to and projects upwardly from said backing and terminates as a cut end, said pile yarn prior to heat setting thereof being characterized in comprising substantially homogeneous polyolefin carpet fibers capable of high shrinkage.
Claim 18
Dependent Claim
17 words
The carpet of claim 17 wherein said yarn is comprised of bulk continuous fibers or staple fibers.
Claim 19
Dependent Claim
43 words
The carpet of claim 17 or 18 wherein the shrinkage of said fibers is such that, following at least 6,000 cycles of Hexapod testing, the appearance rating of said carpet is better than corresponding saxony carpet consisting of polyolefin, low shrinkage carpet fibers.
References Cited (Backward Citations)
No citation records indexed.
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