US5261472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester filaments, yarns and tows
Assignee: Invista North America LLC
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Filing: 1991-09-03
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Granted: 1993-11-16
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Expires: 2011-09-03
Abstract
Abstract Drawing, especially cold-drawing, or hot-drawing or other heat-treatments of spin-oriented crystalline polyester filaments, and particularly polyester feed yarns, that have been prepared by spinning at speeds of, e.g., 4 kg/min, and have low shrinkage and no natural draw ratio in the conventional sense, provides useful technique for obtaining uniform drawn filaments of desired denier and thereby provides improved flexibility to obtain filaments and yarns of various denier. The resulting uniform filaments have useful properties that are improved in certain respects.
Inventors
- 👤 Benjamin H. Knox
- 👤 James B. Noe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:29
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/14; D01D; D01D10/00; D01D10/02; D01D5/00; D01D5/08; D01D5/082; D01D5/22; D01D5/24; D01F8/12; D02; D02G; D02G1/00; D02G1/18; D02G3/00; D02G3/02; D02J; D02J1/00; D02J1/22; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T442/00; Y10T442/30; Y10T442/3976
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
147 words
Improved polyester filament warp yarns of elongation-to-break (E B ) about 20 to about 90%, tenacity at 7% elongation (T 7 ) at least about 1 gram/denier, post yield modulus (PYM) such that its square root (√PYM) is about 2.5 to 5, boil-off shrinkage (S 1 ) less than about 10%, thermal stability as shown by an S 2 value less than about +2%, net shrinkage (S 12 ) less than about 8%, maximum shrinkage tension (ST) less than about 0.5 grams/denier, density (ρ) about 1.355 to about 1.415 grams/cubic centimeter, crystal size (CS) about 60 to about 90 Å and also at least about the following value in relation to the density: CS>(250 ρ-282.5)Å and Relative Disperse Dye Rate (RDDR) at least about 0.075 and also at least about the following value in relation to the square root of the post yield modulus (√PYM) RDDR>0.165-0.025 √PYM.
Claim 2
Dependent Claim
147 words
Improved polyester filament warp yarns of elongation-to-break (E B ) about 20 to about 90%, tenacity at 7% elongation (T 7 ) at least about 1 gram/denier, post yield modulus (PYM) such that its square root (√PYM) is about 2.5 to 5, boil-off shrinkage (S 1 ) less than about 10%, thermal stability as shown by an S 2 value less than about +2%, net shrinkage (S 12 ) less than about 8%, maximum shrinkage tension (ST) less than about 0.5 grams/denier, density (ρ) about 1.355 to about 1.415 grams/cubic centimeter, crystal size (CS) about 60 to about 90 Å and also at least about the following value in relation to the density: CS>(250 ρ-282.5)Å and Relative Disperse Dye Rate (RDDR) at least about 0.075 and also at least about the following value in relation to the square root of the post yield modulus (√PYM) RDDR>0.165-0.025 √PYM.
Claim 3
Dependent Claim
29 words
Warp yarns according to claim 1, characterized in that each of the boil-off shrinkage (S 1 ) and the net shrinkage (S 12 ) is less than about 6%.
Claim 4
Dependent Claim
38 words
Warp yarns according to claim 1, characterized in that the elongation-to-break (E B ) is about 20 to about 60%, and the post yield modulus (PYM) is such that its square root (√PYM) is about 3 to 5.
Claim 5
Dependent Claim
20 words
Warp yarns according to claim 1, characterized in that the Relative Disperse Dye Rate (RDDR) is at least about 0.09.
Claim 6
Dependent Claim
20 words
Warp yarns according to claim 1, characterized in that the maximum shrinkage tension (ST) is less than about 0.15 grams/denier.
Claim 7
Dependent Claim
21 words
Warp yarns according to claim 1, characterized in that the density (ρ) is about 1.37 to about 1.415 g/cm 3 .
Claim 8
Dependent Claim
147 words
Improved polyester filament tow, of elongation-to-break (E B ) about 20 to about 90%, tenacity at 7% elongation (T 7 ) at least about 1 gram/denier, post yield modulus (PYM) such that its square root (√PYM) is about 2.5 to 5, boil-off shrinkage (S 1 ) less than about 10%, thermal stability as shown by an S 2 value less than about +2%, net shrinkage (S 12 ) less than about 8%, maximum shrinkage tension (ST) less than about 0.5 grams/denier, density (ρ) about 1.355 to about 1.415 grams/cubic centimeter, crystal size (CS) about 60 to about 90 Å and also at least about the following value in relation to the density: CS>(250 ρ-282.5) Å. and Relative Disperse Dye Rate (RDDR) at least about 0.075 and also at least about the following value in relation to the square root of the post yield modulus (√PYM) RDDR>0.165-0.025 √PYM.
Claim 9
Dependent Claim
147 words
Improved polyester filament tow, of elongation-to-break (E B ) about 20 to about 90%, tenacity at 7% elongation (T 7 ) at least about 1 gram/denier, post yield modulus (PYM) such that its square root (√PYM) is about 2.5 to 5, boil-off shrinkage (S 1 ) less than about 10%, thermal stability as shown by an S 2 value less than about +2%, net shrinkage (S 12 ) less than about 8%, maximum shrinkage tension (ST) less than about 0.5 grams/denier, density (ρ) about 1.355 to about 1.415 grams/cubic centimeter, crystal size (CS) about 60 to about 90 Å and also at least about the following value in relation to the density: CS>(250 ρ-282.5) Å. and Relative Disperse Dye Rate (RDDR) at least about 0.075 and also at least about the following value in relation to the square root of the post yield modulus (√PYM) RDDR>0.165-0.025 √PYM.
Claim 10
Dependent Claim
29 words
A tow according to claim 7, characterized in that each of the boil-off shrinkage (S 1 ) and the net shrinkage (S 12 ) is less than about 6%.
Claim 11
Dependent Claim
38 words
A tow according to claim 7, characterized in that the elongation-to-break (E B ) is about 20 to about 60%, and the post yield modulus (PYM) is such that its square root (√PYM) is about 3 to 5.
Claim 12
Dependent Claim
20 words
A tow according to claim 7, characterized in that the Relative Disperse Dye Rate (RDDR) is at least about 0.09.
Claim 13
Dependent Claim
20 words
A tow according to claim 7, characterized in that the maximum shrinkage tension (ST) is less than about 0.15 grams/denier.
Claim 14
Dependent Claim
21 words
A tow according to claim 7, characterized in that the density (ρ) is about 1.37 to about 1.415 g/CM 3 .
Claim 15
Dependent Claim
116 words
Improved polyester filament yarns, of elongation-to-break (E B ) about 20 to about 90%, tenacity at 7% elongation (T 7 ) at least about 1 gram/denier, post yield modulus (PYM) such that its square root (√PYM) is about 2.5 to 5, boil-off shrinkage (S 1 ) less than about 10%, thermal stability as shown by an S 2 value less than about +2%, net shrinkage (S 12 ) less than about 8%, maximum shrinkage tension (ST) less than about 0.5 grams/densier, density (ρ) about 1.355 to about 1.415 grams/cubic centimeter, and of crystal size (CS) about 60 to about 90 Angstroms and also at least about the following value in relation to density; CS>(250 ρ-282.5) Angstroms
Claim 16
Dependent Claim
116 words
Improved polyester filament yarns, of elongation-to-break (E B ) about 20 to about 90%, tenacity at 7% elongation (T 7 ) at least about 1 gram/denier, post yield modulus (PYM) such that its square root (√PYM) is about 2.5 to 5, boil-off shrinkage (S 1 ) less than about 10%, thermal stability as shown by an S 2 value less than about +2%, net shrinkage (S 12 ) less than about 8%, maximum shrinkage tension (ST) less than about 0.5 grams/densier, density (ρ) about 1.355 to about 1.415 grams/cubic centimeter, and of crystal size (CS) about 60 to about 90 Angstroms and also at least about the following value in relation to density; CS>(250 ρ-282.5) Angstroms
Claim 17
Dependent Claim
38 words
Yarns according to claim 13, wherein each of the boil-off shrinkage (S 1 ) and the net shrinkage (S 12 ) is less than about 6%, and the density is about 1.37 to about 1.415 g/cm 3 .
Claim 18
Dependent Claim
17 words
Yarns according to claim 13, wherein the maximum shrinkage tension (ST) is less than about 0.15 grams/denier.
Claim 19
Dependent Claim
49 words
Yarns according to claim 13, wherein each of the boil-off shrinkage (S 1 ) and the net shrinkage (S 12 ) is less than about 6% and the density is about 1.37 to about 1.415 g/cm 3 and the maximum shrinkage tension (ST) is less than about 0.15 grams/denier.
Claim 20
Dependent Claim
35 words
Yarns according to claim 13, wherein the elongation-to-break (E B ) is about 20 to about 60%, and the post yield modulus (PYM) is such that its square root (√PYM) is about 3 to 5.
Claim 21
Dependent Claim
17 words
Yarns according to claim 13, wherein the Relative Disperse Dye Rate (RDDR) is at least about 0.09.
Claim 22
Dependent Claim
47 words
Yarns according to claim 13, wherein the elongation-to-break (E B ) is about 20 to about 60%, and the post yield modulus (PYM) is such that its square root (√PYM) is about 3 to 5, and the Relative Disperse Dye Rate (RDDR) is at least about 0.09.
Claim 23
Dependent Claim
152 words
A fabric of polyester filament yarns, the improvement characterized in that said fabric has a Mullen Burst Strength (lbs.*yd 2 /oz.*in.) as measured on the fabric after boil-off (ABO) of at least about 31[1-E B (ABO)/100] and said polyester filament yarns are of elongation-to-break (E B ) about 20 to about 90%, tenacity at 7% elongation (T 7 ) at least about 1 gram/denier, post yield modulus (PYM) such that its square root (√PYM) is about 2.5 to about 5, boil-off shrinkage (S 1 ) less than about 10%, thermal stability as shown by an S 2 value of less than about 2%, net shrinkage (S 12 ) less than about 8%, maximum shrinkage tension (ST) less than about 0.5 grams/denier, density (ρ) about 1.355 to about 1.415 grams/cubic centimeter, crystal size (CS) about 60 to about 90 Angstroms and also at least about the following relation to density: CS>(250 ρ-282.5) Angstroms
Claim 24
Dependent Claim
152 words
A fabric of polyester filament yarns, the improvement characterized in that said fabric has a Mullen Burst Strength (lbs.*yd 2 /oz.*in.) as measured on the fabric after boil-off (ABO) of at least about 31[1-E B (ABO)/100] and said polyester filament yarns are of elongation-to-break (E B ) about 20 to about 90%, tenacity at 7% elongation (T 7 ) at least about 1 gram/denier, post yield modulus (PYM) such that its square root (√PYM) is about 2.5 to about 5, boil-off shrinkage (S 1 ) less than about 10%, thermal stability as shown by an S 2 value of less than about 2%, net shrinkage (S 12 ) less than about 8%, maximum shrinkage tension (ST) less than about 0.5 grams/denier, density (ρ) about 1.355 to about 1.415 grams/cubic centimeter, crystal size (CS) about 60 to about 90 Angstroms and also at least about the following relation to density: CS>(250 ρ-282.5) Angstroms
Claim 25
Dependent Claim
47 words
A fabric according to claim 20, wherein asid polyester filament yarns comprising said fabric are of Relative Disperse Dye Rate (RDDR) at least about 0.075 and also at least about the following value in relation to the square root of the post yield modulus (√PYM): RDDR>(0.165-0.025 √PYM).
References Cited (Backward Citations)
US3771307A
Cited
US3772872A
Cited
US4134882A
Cited
US4195051A
Cited
US4156071A
Cited
US4407767A
Cited
DE3018373A1
Cited
DE3328449A1
Cited
US5066447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-11-15 | 1997-05-17 | 1997-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-15 | 2001-05-17 | 2001-11-16 | $3760.00 | Window Closed / Lapsed |
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