Knox Benjamin H. (West Chester PA) Noe James B. (Wilmington NC)
출원인 / 주소
E. I. Du Pont de Nemours and Company (Wilmington DE 02)
인용정보
피인용 횟수 :
3인용 특허 :
0
초록▼
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 se
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.
대표청구항▼
Improved polyester filament warp yarns of elongation-to-break (EB) about 20 to about 90%, tenacity at 7% elongation (T7) 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 (S1) less than about 10%, thermal stability as shown
Improved polyester filament warp yarns of elongation-to-break (EB) about 20 to about 90%, tenacity at 7% elongation (T7) 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 (S1) less than about 10%, thermal stability as shown by an S2 value less than about +2%, net shrinkage (S12 ) less than about 8%, maximum shrinkage tension (ST) less than about 0.5 grams/denier, density (r1.355 to about 1.415 grams/cubic centimeter, crystal size (CS) about 60 to about 90 Åand also at least about the following value in relation to the density: CS>(250 r)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. A fabric of polyester filament yarns, the improvement characterized in that said fabric has a Mullen Burst Strength (lbs.*yd2/oz.*in.) as measured on the fabric after boil-off (ABO) of at least about 31[1-EB(ABO)/100]and said polyester filament yarns are of elongation-to-break (EB) about 20 to about 90%, tenacity at 7% elongation (T7) 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 (S1) less than about 10%, thermal stability as shown by an S2 value of less than about 2%, net shrinkage (S12) less than about 8%, maximum shrinkage tension (ST) less than about 0.5 grams/denier, density (r1.355 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 r) Angstroms
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허를 인용한 특허 (3)
Fare',Rosaldo, Apparatus and method for treating synthetic yarns.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.