Ply-twisted yarn for cut resistant fabrics
AssigneeE. I. Du Pont de Nemours and Company
InventorsReiyao Zhu, Richard H. Young
Life of this patent
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Abstract
A ply-twisted yarn useful in cut resistant fabrics is made by providing a first multifilament yarn of continuous organic filaments having a tensile strength of at least 4 grams per denier and having a twist in a first direction of from 0.5 to 10 turns per inch; providing a second yarn comprising 1 to 5 continuous inorganic filament(s); and ply-twisting the first yarn and the second yarn about each other 2 to 15 turns per inch in a second direction opposite to that of the twist in the first yarn to form a ply-twisted yarn having an overall effective twist of +/−5 turns per inch.
Claims21
A process for making a cut-resistant ply-twisted yarn comprising:
- a) providing a first multifilament yarn having a tensile strength of at least 4 grams per denier and comprising continuous organic filaments, said first yarn having a twist in a first direction of from 0.5 to 10 turns per inch;
- b) providing a second yarn comprising 1 to 5 continuous inorganic filament(s);
- and
- c) ply-twisting the first yarn and the second yarn about each other 2 to 15 turns per inch in a second direction opposite to that of the twist in the first yarn to form a ply-twisted yarn having an overall effective twist of +/−5 turns per inch.
A cut-resistant ply-twisted yarn comprising:
- a) a first multifilament yarn having a tensile strength of at least 4 grams per denier and comprising continuous organic filaments, said first yarn having twist in a first direction of from 0.5 to 10 turns per inch;
- b) a second yarn comprising 1 to 5 continuous inorganic filament(s);
- and
- c) the first yarn and the second yarn having a ply-twist about each other of 2 to 15 turns per inch in a second direction opposite to that of the twist in the first yarn,
- said cut-resistant ply-twisted having an overall effective twist of +/−5 turns per inch.
A woven fabric useful in protective apparel made from yarn components comprising:
- a body fabric yarn component,
- a cut-resistant yarn component comprising a ply-twisted yarn comprising a first multifilament yarn having a tensile strength of at least 4 grams per denier and comprising continuous organic filaments, and a second yarn comprising 1 to 5 continuous inorganic filament(s);
- said ply-twisted yarn having an overall effective twist of +/−5 turns per inch,
- the body fabric yarn component and the cut-resistant yarn component each being comprised of at least one yarn and each yarn component distinguished from the adjacent yarn component by interweaving orthogonal yarn components.
Dependencies are inferred from the claim text.