Multilayered material sheet and process for its preparation

Patent metadata

Field	Value
Publication number	US-2016290769-A1
Application number	US-201615178561-A
Country	US
Kind code	A1
Filing date	Jun 9, 2016
Priority date	Apr 26, 2006
Publication date	Oct 6, 2016
Grant date	—

Abstract

The invention relates to ballistic resistant article having a multilayered material sheet which includes a consolidated stack of unidirectional monolayers of drawn polymer, whereby the draw direction of two subsequent monolayers in the stack differs. At least one monolayer comprises a plurality of unidirectional tapes of the drawn polymer, aligned in the same direction, whereby adjacent tapes do not overlap. The invention also relates to a process for the preparation of the multilayered material sheet, and to a ballistic resistant article comprising the multilayered material sheet.

First claim

1 . A ballistic resistant article comprising a multilayered material sheet which is comprised of:
a consolidated stack of unidirectional monolayers of drawn polymer, wherein two subsequent monolayers in the stack have draw directions which differ from one another, and wherein at least one monolayer comprises at least one unidirectional tape of the drawn polymer, each tape comprises longitudinal edges, wherein the monolayer is free of an area of elevated thickness adjacent to and along the substantial length of the longitudinal edges of the at least one unidirectional tape, wherein the monolayer contains more than one unidirectional tape of the drawn polymer whereby adjacent tapes do not overlap, and a binder, wherein the binder comprises less than 20% of the weight of the monolayer or a consolidated stack comprising the monolayer.

2 . The ballistic resistant article according to claim 1 , comprising at least 40 unidirectional monolayers.

3 . The ballistic resistant article according to claim 1 , comprising a further sheet of inorganic material selected from the group consisting of ceramic, steel, aluminum, magnesium titanium, nickel, chromium and iron or their alloys, glass and graphite, or combinations thereof.

4 . The ballistic resistant article according to claim 3 , wherein the further sheet of inorganic material is positioned at an outside of the stack of monolayers at least at the strike face thereof.

5 . The ballistic resistant article according to claim 3 , whereby the thickness of the further sheet of inorganic material is at most 50 mm.

6 . The ballistic resistant article according to claim 3 , further comprising a bonding layer between the further sheet of inorganic material and the material sheet, the bonding layer comprising a woven or non-woven layer of inorganic fiber.

7 . The ballistic resistant article according to claim 1 , wherein the binder includes polyethylene, cross linked polyethylene, polypropylene, ethylene copolymers, propylene copolymers and other olefin polymers and copolymers.

8 . A ballistic resistant article comprising a multilayered material sheet which is comprised of:
a consolidated stack of unidirectional monolayers of drawn polymer, wherein the draw direction of two subsequent monolayers in the stack differs, wherein at least one monolayer comprises at least one unidirectional tape of the drawn polymer, each tape comprises longitudinal edges, wherein the monolayer is free of an area of elevated thickness adjacent to and along the substantial length of the longitudinal edges of the at least one unidirectional tape, wherein the monolayer contains more than one unidirectional tape of the drawn polymer whereby adjacent tapes do not overlap, and a binder, wherein the binder includes at least one elastomer with a modulus, measured at 23° C., of less than about 41,300 kPa.

9 . The ballistic resistant article according to claim 8 , comprising at least 40 unidirectional monolayers.

10 . The ballistic resistant article according to claim 8 , comprising a further sheet of inorganic material selected from the group consisting of ceramic, steel, aluminum, magnesium titanium, nickel, chromium and iron or their alloys, glass and graphite, or combinations thereof.

11 . The ballistic resistant article according to claim 8 , wherein the further sheet of inorganic material is positioned at an outside of the stack of monolayers at least at the strike face thereof.

12 . The ballistic resistant article according to claim 8 , whereby the thickness of the further sheet of inorganic material is at most 50 mm.

13 . The ballistic resistant article according to claim 8 , further comprising a bonding layer between the further sheet of inorganic material and the material sheet, the bonding layer comprising a woven or non-woven layer of inorganic fiber.

14 . The ballistic resistant article according to claim 1 , wherein the binder comprises less than 10% of the weight of the monolayer or a consolidated stack comprising the monolayer.

15 . The ballistic resistant article according to claim 1 , wherein the binder comprises less than 5% of the weight of the monolayer or a consolidated stack comprising the monolayer.

16 . The ballistic resistant article according to claim 1 , wherein the binder comprises less than 2% of the weight of the monolayer or a consolidated stack comprising the monolayer.

17 . The ballistic resistant article according to claim 8 , wherein the elastomer is at least one selected from the group consisting of polybutadiene, polyisoprene, natural rubber, ethylene-propylene copolymers, ethylene-propylene-diene terpoymers, polysulphide polymer, polyurethane elastomer, chlorosulphonated polyethylene, polychloroprene, plasticized polyvinylchloride, butadiene acrylonitrile elastomer, poly(isobutylene-co-isoprene), polyacrylate, polyester, polyether, fluoroelastomer, silicone elastomer, thermoplastic elastomers, and ethylene copolymers.

18 . The ballistic resistant article according to claim 8 , wherein the elastomer is a block copolymer of a conjugated diene and a vinyl aromatic monomer.

19 . The ballistic resistant article according to claim 8 , wherein the binder comprises less than 20% of the weight of the monolayer or a consolidated stack comprising the monolayer.

20 . A ballistic resistant article comprising a multilayered material sheet which is comprised of:
a consolidated stack of unidirectional monolayers of drawn polymer, wherein two subsequent monolayers in the stack have draw directions which differ from one another, and wherein at least one monolayer comprises at least one unidirectional tape of the drawn polymer, each tape comprising longitudinal edges, wherein the monolayer is free of an area of elevated thickness adjacent to and along a substantial length of the longitudinal edges of the at least one unidirectional tape, wherein when the monolayer contains more than one unidirectional tape of the drawn polymer whereby adjacent tapes do not overlap, and a binder, wherein the binder is a thermoplastic film bonded to an outer layer of the monolayer, wherein the binder comprises less than 20% of the weight of the unidirectional monolayer or a consolidated stack comprising the monolayer.

21 . The ballistic resistant article according to claim 20 , wherein the thermoplastic film is a thin polyethylene film.

22 . The ballistic resistant article according to claim 20 , wherein the thermoplastic film is a polyethylene film with a thickness of 0.35 mils.

23 . A ballistic resistant article comprising a multilayered material sheet which is comprised of:
a consolidated stack of unidirectional monolayers of drawn polymer, wherein the draw direction of two subsequent monolayers in the stack differs, wherein at least one monolayer comprises at least one unidirectional tape of the drawn polymer, each tape comprising longitudinal edges, wherein the monolayer is free of an area of elevated thickness adjacent to and along a substantial length of the longitudinal edges of the at least one unidirectional tape, wherein when the monolayer contains more than one unidirectional tape of the drawn polymer whereby adjacent tapes do not overlap, and a binder, wherein the binder is at least one elastomer selected from the group consisting of polybutadiene, polyisoprene, natural rubber, ethylene-propylene copolymers, ethylene-propylene-diene terpoymers, polysulphide polymer, polyurethane elastomer, chlo

Assignees

• Dsm Ip Assets Bv

Inventors

• Marissen Roelof
• Simmelink Joseph Arnold Paul Maria
• Steeman Reinard Jozef Maria
• Calis Gijsbertus Hendrikus Maria
• Mencke Jacobus Johannes
• Beugels Jean Hubert Marie
• Vanek David
• Van Elburg Johann
• Peters Alexander Volker
• Tanderup Steen
• Dorschu Marko

Classifications

• F41H5/0485

  all the layers being only fibre- or fabric-reinforced layers · CPC title

• B32B15/14

  next to a fibrous or filamentary layer · CPC title

• Y10T428/2913

  Rod, strand, filament or fiber · CPC title

• B32B5/022

  Non-woven fabric · CPC title

• F41H5/04 Primary

  composed of more than one layer {(outerwear resistant to mechanical aggressions A41D31/24; layered products B32B; shaping reinforced articles B29C67/00)} · CPC title