Load leveling yarns and webbings

Details Load leveling yarns and webbings Load leveling yarns and webbings

1998-03-13

2000-05-02

Morris, Terrel

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Woven fabric

Woven fabric is characterized by a particular or...

57243, 280805, 297471, D03D 300

Patent

active

060572523

ABSTRACT:
The present invention provides load leveling and impact energy absorption webbing comprising warp yarn. If the webbing is used in seat belts, the webbing provides load leveling behavior from about 450 pounds (about 2,000 Newtons) to about 1,800 pounds (about 8,000 Newtons) in vehicle collision. The yarn has a force-displacement profile such that: (a) when the yarn is subjected to an initial barrier stress of from about 0.2 gram/denier to less than or equal to about 1.4 grams/denier, the yarn elongates to less than 3 percent and the initial modulus ranges from about 20 grams/denier to about 150 grams/denier; (b) upon subjecting the yarn to greater than the initial barrier stress and less than or equal to 1.8 grams/denier, the yarn elongates further to at least about 10 percent and the energy absorbed from 0 to the elongation at 1.8 grams/denier is at least about 0.0008 Joule/denier.multidot.meter; and (c) upon subjecting the yarn to greater than 1.8 grams/denier, the modulus increases sharply and the yarn elongates further until the yarn breaks at a tensile strength of at least about 5 grams/denier, wherein the yarn comprises a multiplicity of fibers, all of said warp yarns having substantially the same force-displacement profile, are made from polymer having a glass transition temperature in the range from about -40.degree. C. to about +70.degree. C., and are not made from polybutylene terephthalate homopolymer.
The web may be used for safety restraining webs for seat belts, parachute harnesses and lines, shoulder harnesses, cargo handling, safety nets, trampolines, safety belts or harnesses for workers at high attitudes, military arrestor tapes for slowing aircraft, ski tow lines, and in cordage applications such as for yacht mooring or oil derrick mooring.

REFERENCES:
patent: 3296062 (1967-01-01), Truslow
patent: 3322163 (1967-05-01), Hughes
patent: 3464459 (1969-09-01), Ballard
patent: 3486791 (1969-12-01), Stoffel et al.
patent: 3530904 (1970-09-01), Ballard
patent: 3550957 (1970-12-01), Radke et al.
patent: 3756288 (1973-09-01), Seo et al.
patent: 3823748 (1974-07-01), Allman et al.
patent: 3872895 (1975-03-01), Takada
patent: 3926227 (1975-12-01), Takada et al.
patent: 3927167 (1975-12-01), Reese
patent: 3957905 (1976-05-01), Sumoto et al.
patent: 4031165 (1977-06-01), Saiki et al.
patent: 4045401 (1977-08-01), Steumark et al.
patent: 4110411 (1978-08-01), Imanaka et al.
patent: 4138157 (1979-02-01), Pickett et al.
patent: 4228829 (1980-10-01), Kikuchi
patent: 4500686 (1985-02-01), Kobayashi et al.
patent: 4584353 (1986-04-01), Kobayashi et al.
patent: 4670498 (1987-06-01), Furusawa et al.
patent: 4670510 (1987-06-01), Kobayashi et al.
patent: 4694049 (1987-09-01), Morita et al.
patent: 4710423 (1987-12-01), Imamura
patent: 5376440 (1994-12-01), Koseki
patent: 5397527 (1995-03-01), Rim et al.
patent: 5547143 (1996-08-01), Miller, III et al.
patent: 5645077 (1997-07-01), Matsunega et al.
patent: 5656700 (1997-08-01), Kagi et al.
patent: 5716568 (1998-02-01), Kaegi et al.
patent: 5830811 (1998-11-01), Tang et al.
Journal of Polymer Science 12, (1974) "Viscosity-Molecular Weight Relationship for Fractional Poly(ethylene Terephthalate", by William L. Hergenrother & Charles J. Nelson, pp. 2905-2915.
Textile Research Journal 66(11), (1996) "Effects of Molecular Weight on Melt Spinning and Mechanical Properties of High Performance Poly(ethylene Terephthalate) Fibers", by Andrzej Ziabicki, pp. 705-712.
Journal of Applied Polymer Science 22 (1978) "Molecular Weight-Viscosity Relationships for Poly (1 4-butylene Terephthalate)", by W.F.H. Borman, pp. 2119-2126.
Principles of Polymer Chemistry by Paul J. Flory (1953) pp. 308-310.
Textile Research Institute, "Identifying Critical Process Variables in Poly(ethylene Terephthalate Melt Spinning", by A. Dutta & V. Nadkarni, (Jan. 1984) pp. 35-42.
International Search Report for PCT/US97/23673 (dated Jun. 29, 1998).

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