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Polymeric blends useful in ballistic applications

A technology of bulletproof fabrics and thermoplastic polymers, applied to the structure of fabrics, protective equipment, armor plates, etc., can solve the problems of not solving heat resistance, not involving the advantages of thermoplastic resin blends, not suitable for exposure, etc.

Inactive Publication Date: 2013-02-13
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] For example, WO2009048674 (A2) covers rigid armor applications reinforced with thermoplastic matrix materials, but does not address the advantages of using thermoplastic resin blends, nor does it address the need for heat resistance
Additionally, a selected resin will not be suitable for exposure to temperatures above the typical 60°C to 80°C where softening and stressed flow will occur

Method used

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  • Polymeric blends useful in ballistic applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0108] Reference Example R1 :

[0109] Pre-impregnated with 400g / m by the following method 2 area weight and is composed of fibers with a decitex linear quality of 3140 and can be trademarked 129 Commercially available polyparaphenylene terephthalamide plain weave fabric from DuPont de Nemours, USA: according to military standard MIL-DTL-62474F, it is compared with 2 B-stepped PVB / phenolic resin films of areal density were calendered together to obtain a pre-impregnated parylene terephthalamide fabric.

[0110] Eighteen layers of the polyparaphenylene terephthalamide pre-impregnated fabric obtained by the method described above were stacked and compression molded in a parallel plate automatic press using a pressure of 10 bar and a temperature of 165° C. for 15 minutes.

[0111] The resulting 18-layer stack was removed from the heat press and allowed to cool to room temperature. The 18-layer composite panels obtained by the above method were conditioned at 25°C and 50% rela...

Embodiment E2

[0122] The two ingredients used for the umbrella bag are:

[0123] 1. Can trademark 129 from DuPont de Nemours, the commercially available polyparaphenylene terephthalamide plain weave fabric of USA, it has 400g / m 2 of areal weight and consist of fibers with a decitex linear quality of 3140.

[0124] 2. A cast extruded sheet of a thermoplastic composition having a thickness of 50 μm and a melting point of 178° C. and consisting of 60% by weight of nylon 12 and 40% by weight of zinc ionomer, based on the weight of the thermoplastic composition, said nylon 12 has a melting point of 180°C and is commercially available from Arkema under the trademark Rilsan AESNO; the zinc ionomer has a melting point of 95°C, has a neutralization percentage of 60% and comprises ethylene (83% by weight), methacrylic acid (11 % by weight) and maleic anhydride (6% by weight).

[0125] The umbrella case was made of 18 layers of parylene terephthalamide fabric combined with 18 layers of cast extrud...

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Abstract

The present invention provides a use of a thermoplastic composition for manufacturing a ballistic protection system, wherein the thermoplastic composition comprises at least a first thermoplastic polymer that has a melting point superior to the melting point of a second thermoplastic polymer, and wherein the second thermoplastic polymer is dispersed in a continuous or co-continuous phase of the first thermoplastic polymer. Further, the present invention provides a ballistic protection system comprising c. at least one ballistic fabric and; d. at least one thermoplastic composition for use in ballistic applications, wherein the thermoplastic composition as set forth above.

Description

field of invention [0001] The present invention relates to materials comprising polymer blends having utility in the manufacture of articles intended for use in civilian and / or military protection systems. Background of the invention [0002] Aramid fibers are a class of heat-resistant and strong synthetic fibers. They are used in demanding applications such as aerospace and military applications, ballistic protection, tires and as an asbestos replacement. [0003] In ballistic protection applications, aramid fibers are often present in multiple superimposed woven layers. Unlike most polymer fibers, the high tensile strength of aramid fibers makes them the material of choice for ballistic protection systems, especially when exposed to harsh environmental conditions. [0004] Composite armor is widely used in, for example, vehicle applications to protect the user from bullets, splinters or any other type of impact or related threats. [0005] Composite armor combines balli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L77/00F41H5/04
CPCC08L23/0876C08L77/02F41H5/0485C08L77/00Y10T442/2623
Inventor L.布格N.蓬S.勒布瓦拉L.P.罗兰
Owner EI DU PONT DE NEMOURS & CO
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