Abstract There is provided a fibrillated continuous filament yarn comprised of random-length fibrils of a synthetic organic high polymer wherein: the average width/thickness ratio of cross sections of the fibrils (the ''''aspect ratio'''') is from about 2/1 to about 12/1, and the aspect ratios of the cross sections of the fibrils range from about 0.5/1 to about 20/1; the fibrils in the yarn exceeding 40 centimeters in length comprise at least 70 percent (by weight) of the yarn; the tenacity of the yarn is from about 0.1 to about 10 grams per denier; the total denier of the yarn is from 30 to about 10,000, and the average denier per fibril of the fibrils comprising the yarn is from about 0.5 to about 60; the elongation of the yarn is from about 0.5 to about 75 percent; and the initial modulus of the yarn is from about 2 to about 300. The yarn of this invention has high tenacity, a soft hand, and good cover.
The yarn of claim 1, wherein said yarn is essentially comprised of polymer selected from the group consisting of poly(ethylene terephthalate) polymer, poly(trimethylene terephthalate) polymer, and poly(tetramethylene terephthalate) polymer; said yarn contains less than 4 free fibril ends per centimeter.
Claim 2
Dependent Claim
11 words
The yarn of claim 2, wherein said polymer is poly(ethylene terephthalate).
Claim 3
Dependent Claim
139 words
The yarn of claim 3, wherein said polymer has an intrinsic viscosity of from about 0.4 to about 0.8; the average aspect ratio of the yarn is from about 2.5 to about 7.0 and the average aspect ratio of fibrils comprising the yarn is from about 3/1 to about 5/1; the tenacity of the yarn is from about 0.5 to about 7 grams per denier; the elongation of the yarn is from about 1 to about 20 percent; the initial modulus of the yarn is from about 30 to about 200 grams per denier; the fibrils comprising the yarn have a tenacity of from about 2 to abOut 6 grams per denier and an elongation at break of from about 2 to about 25 percent; and the boiling water shrinkage of said yarn is up to about 20 percent.
Claim 4
Dependent Claim
32 words
The yarn of claim 4, wherein said initial modulus is from about 50 to about 120 grams per denier and said boiling water shrinkage is from about 5 to about 10 percent.