Ceramic faced ballistic panel construction

A bulletproof plate and ceramic layer technology, which is applied to the structure of armor plates, ceramic layered products, protective clothing, etc., can solve the problems of no pre-qualification and achieve the effect of high flexibility and cost reduction

Inactive Publication Date: 2009-06-03
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This substitution may also not be pre-qualified for a specific application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Embodiment 1 (comparison)

[0081] Ceramic-clad panels are produced from ceramic tiles. The tiles were silicon carbide ceramics (SiC-N, available from Cercom Ceramics, with a bulk density reported by the manufacturer of 3.20 g / cm 3 , average grain size (average grain size) 3-5μm, flexural strength (4-pt MOR, room temperature) is 85ksi (586MPa)). Four tiles were used, each 0.145 inches (3.68mm) thick, with an areal density of 2.50psf (12.2ksm), in the form of 5.25 x 5.25 inch (13.34 x 13.34cm) pieces.

[0082] The fiber layer is composed of four-layer high molecular weight polyethylene fiber composite material (SPECTRASHIELD PCR, purchased from Honeywell International Inc.). This material is a matrix resin (16% by weight Kraton D1107, a nonwoven unidirectional structure of isoprene-styrene-isoprene block copolymer) available from Kraton Polymer LLC. The 4-sheet structure includes individual sheets cross-laminated in a 0° / 90° / 0° / 90° manner. SPECTRA The polyeth...

Embodiment 2

[0086] Embodiment 2 (comparison)

[0087] Example 1 was repeated using a different fiber backing material. Lining material by GOLDSHIELD Formed from RS (available from Honeywell International Inc.), which is a 4-sheet aramid nonwoven with a base resin (16% by weight thermoplastic polyurethane resin, described by the manufacturer as a copolymer blend of polyurethane resin in water) Unidirectional orientation structure. The 4-sheet structure includes individual sheets laminated at 0° / 90° / 0° / 90° crosswise. The fineness of the aramid fiber is 1000 denier, and the tenacity is 26 g / d.

[0088] A total of 44 layers of the 4-ply prepreg were cut to the same dimensions as in Example 1 and stacked, with each prepreg oriented at 90° to the adjacent prepreg layer. The layup of prepreg was molded at 240°F (116°C) for 10 minutes at 1500 psi (10.3 MPa) and then cooled. The fiber backing layer has an areal density of 2.00 psf (9.76 ksm), a thickness of 0.324 inches (8.23 mm), and a fle...

Embodiment 3

[0092] Example 1 was repeated, but using both the first high molecular weight polyethylene fiber layer and the second aramid fiber layer as the backing layer. The high molecular weight polyethylene layer was formed from a total of 20 layers of the 4-ply high molecular weight polyethylene prepreg of Example 1 and was used as the first fibrous backing layer. The aramid layer was formed from a total of 22 layers of the 4-ply aramid prepreg of Example 2 and was used as the second fibrous backing layer.

[0093] The combined plies were cut to the same size as in Example 1 and laminated with adjacent sheets of high molecular weight polyethylene fibers and aramid fibers turned 90° to each other. The combined layers were molded under the conditions in Example 1. The combined fibrous backing layer had an areal density of 2.02 psf (9.86 ksm), a thickness of 0.374 inches (9.50 mm), and a flexural modulus of 211.6 ksi (1457.9 MPa).

[0094] Four ceramic sheets were placed on the molded ...

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Abstract

The present invention provides a ballistic resistant panel which is formed from a ceramic layer and a plurality of fibrous backing layers. A first fibrous backing layer is adjacent to the ceramic layer and a second fibrous backing layer is adjacent to the first fibrous backing layer. Each of the fibrous backing layers are formed from a network of high tenacity fibers, but the fibers of each of the backing layers have a different composition. Preferably, the first fibrous layer is stiffer than the second fibrous layer. The panel has a ballistic resistance which is substantially equivalent to or higher than the ballistic resistance of a comparable ceramic panel construction that has only a single fibrous layer of the same type of high tenacity fibers as are in the first and second fibrous backing layers for substantially the same areal density.

Description

technical field [0001] The present invention relates to ballistic armor comprising a ceramic facing layer. Background technique [0002] Various types of ballistic armor structures have been designed and utilized in different application areas. These include armor for land vehicles, aircraft, body armor, stationary objects and more. In one known type of ballistic armor construction, eg for land vehicles and aircraft, ceramic sheets are adhered to layers of high tenacity fibers. In said structure the ceramic sheets are designed to face outwards and serve as a primary layer providing initial protection against ballistic projectiles. Such structures are known as ceramic faced panels. These plates are generally effective in absorbing and dissipating kinetic energy from projectiles and projectile fragments. [0003] High tenacity fibers suitable for this application include high molecular weight polyethylene fibers, aramid fibers, and the like. However, high-tenacity fibers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/26B32B5/28B32B7/02F41H5/04B32B18/00B32B7/022
CPCB32B7/02B32B5/26F41H5/0428B32B5/28F41H5/0435Y10T428/24124Y10T428/24033Y10T442/2623Y10T442/2615Y10T442/659B32B7/022B32B2262/101B32B2262/106B32B5/12B32B9/047B32B7/14B32B2571/02B32B2307/546B32B2315/02B32B9/005B32B2262/0253B32B2262/0269
Inventor A·巴特纳加L·L·沃纳H·L·小默里B·D·阿维森M·拉穆菲
Owner HONEYWELL INT INC
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