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Publication numberCA2500958 A1
Publication typeApplication
Application numberCA 2500958
PCT numberPCT/US2003/031673
Publication date15 Apr 2004
Filing date1 Oct 2003
Priority date3 Oct 2002
Also published asCA2500958C, CN1703545A, CN1703545B, DE60333767D1, EP1546442A1, EP1546442B1, US7127879, US20040065072, WO2004031462A1
Publication numberCA 2500958, CA 2500958 A1, CA 2500958A1, CA-A1-2500958, CA2500958 A1, CA2500958A1, PCT/2003/31673, PCT/US/2003/031673, PCT/US/2003/31673, PCT/US/3/031673, PCT/US/3/31673, PCT/US2003/031673, PCT/US2003/31673, PCT/US2003031673, PCT/US200331673, PCT/US3/031673, PCT/US3/31673, PCT/US3031673, PCT/US331673
InventorsReiyao Zhu, Richard H. Young
ApplicantE. I. Du Pont De Nemours And Company, Reiyao Zhu, Richard H. Young
Export CitationBiBTeX, EndNote, RefMan
External Links: CIPO, Espacenet
Ply-twisted yarn for cut resistant fabrics
CA 2500958 A1
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.
Description  available in
Claims(11)
1. 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 +/-turns per inch.
2. The process of claim 1 wherein the first yarn comprises aramid filaments and the second yarn comprises steel filament(s).
3. 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.
4. The ply-twisted yarn of claim 3 wherein the first yarn comprises aramid filaments.
5. The ply-twisted yarn of Claim 3 wherein the first yarn of the cut-resistant yarn component comprises poly (p-phenylene terephthalamide) filaments.
6. The ply-twisted yarn of claim 3 wherein the inorganic filaments comprise steel filament(s).
7. 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.
8. A woven fabric useful in protective apparel made from yarn components comprising:
a) a body fabric yarn component, b) a cut-resistant yarn component comprising a ply-twisted yarn comprising a first multifilament yarn comprising continuous organic filaments, and a second yarn comprising 1 to 5 continuous inorganic filament(s); said ply-twisted yarn having a positive overall effective twist , the body fabric yarn component and the cut-resistant yarn component being comprised of individual warp and fill yarns in the fabric, and wherein every fifth to ninth orthogonal warp and/or fill yarn component is a cut-resistant yarn component.
9. A process for making a woven fabric useful in protective apparel made from warp and fill yarn components comprising:

a) weaving a fabric from a body fabric yarn component, and b) inserting into the weave at every fifth to ninth warp and fill component a cut-resistant yarn component comprising a ply-twisted yarn comprising a first multifilament yarn comprising continuous organic filaments, and a second yarn comprising 1 to 5 continuous inorganic filament(s); said ply-twisted yarn having a positive overall effective twist.
10. A process for making a woven fabric useful in protective apparel made from warp and fill yarn components comprising:
a) weaving a fabric from a body fabric yarn component, and b) inserting into the weave at every fifth to ninth warp or fill component a cut-resistant yarn component to create an array of cut resistant yarn components, each component comprising a ply-twisted yarn comprising a first multifilament yarn comprising continuous organic filaments, and a second yarn comprising 1 to 5 continuous inorganic filament(s); said ply-twisted yarn having a positive overall effective twist.
11. A firefighting garment containing 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.
Classifications
International ClassificationD02G3/28, D02G3/44
Cooperative ClassificationD02G3/442, D02G3/28
European ClassificationD02G3/44B, D02G3/28
Legal Events
DateCodeEventDescription
15 Jul 2008EEERExamination request