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Enhanced ballistic performance of polymer fibers

A polymer, bulletproof fabric technology, used in fabrics, protective equipment, the structure of armor plates, etc.

Active Publication Date: 2013-02-13
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, as the range of projectile threats continues to widen and the population of people who feel the need to protect themselves against such threats rapidly expands, there is a continuing need in the art to reduce ballistic the weight of the material without reducing the effectiveness of the material in defending against projectile threats

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] To prepare the high modulus fibers of the present invention, 60 filament bundles were gel spun and assembled. The denier of the 60 filament bundle is 650 (10.83 dpf). The 60 monofilament tow was then subjected to a first drawing step, a single-pass double drawing process according to the method described in Example 1 of U.S. Patent 7,344,668, thereby reducing the denier of the tow to 215 (3.58 dpf) . The 60 monofilament tow was then subjected to a second drawing step, another single-pass double drawing process according to the method described in Example 1 of U.S. Patent 7,344,668, thereby reducing the denier of the tow to 163 (2.71 dpf).

Embodiment 2

[0075] The procedure of Example 1 was repeated to assemble a bundle comprising 480 individual filaments and having a denier of 1300 (2.71 dpf). This bundle is indicated in Table 1 as "HMF fibers". The tenacity of the formed fibers was 39 g / denier and the tensile modulus was 1449 g / denier.

Embodiment 3 and 4

[0076] Embodiment 3 and 4 (comparative example) and embodiment 5

[0077] Ballistic shooting bags were prepared from three different types of high modulus polyethylene fibers, denoted in Table 1 as "Standard Fiber", "PLUS Fiber" and "HMF Fiber" for testing the ballistic performance of each fabric type. Standard fibers are high tenacity multifilament polyethylene fibers with a tenacity of 34.3 and drawn to a denier / filament of 5.4. PLUS fibers are high tenacity multifilament polyethylene fibers with a tenacity of 36 and drawn to a denier of 4.6 per filament. Both Standard fiber and PLUS fiber were supplied by Honeywell International Inc., Morristown, NJ. HMF fiber is the high-tenacity multifilament polyethylene fiber obtained in Example 2 of the present invention. Table 1 lists the measured properties for all three fiber types. A comparison of each property listed for each fiber type is shown.

[0078] Prior to forming the shot pack, fiber layers are cut from a continuous...

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Abstract

Ballistic resistant materials having improved strength and lighter weights. More particularly, improved ballistic resistant fabrics produced from drawn, high modulus fibers having a reduced fiber diameter and improved physical strength properties, without changing other properties such as fiber chemistry, binder resin type and binder resin content. The fabrics incorporate low denier per filament monofilament fibers, low denier per filament multifilament fibers, or a combination of low denier per filament monofilament fibers and low denier per filament multifilament fibers in a specialized fabric construction to form fine fiber layers and fabrics having enhanced strength and fiber areal density without altering the fabric weight, or having reduced fabric weight without a corresponding reduction in ballistic performance.

Description

Background of the invention [0001] field of invention. [0002] The present invention relates to ballistic resistant materials with increased strength and reduced weight. More specifically, the present invention relates to improved ballistic resistant fabrics produced from tensile high modulus fibers having reduced fiber diameter and enhanced physical strength properties without altering other properties such as fiber chemical composition, binder resin type, and tackiness. Mixture resin content. [0003] Description of related technologies [0004] Ballistic resistant articles containing high strength fibers having excellent ballistic resistant properties are well known. Articles such as bulletproof vests, helmets, vehicle fenders and structural elements of military installations are typically made from fabrics containing high strength fibers. Conventionally used high-strength fibers include polyethylene fibers, aramid fibers such as poly(phenylenediamine terephthalamide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H13/00D04H3/12D04H3/007D04H3/02D04H3/04F41H1/02F41H5/04
CPCB32B5/26B32B27/02B32B27/04B32B27/32Y10T442/2615
Inventor A.巴特纳加B.D.阿维森C.B.C.谭L.L.瓦格纳
Owner HONEYWELL INT INC
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