Composite material

Patent metadata

Field	Value
Publication number	US-2016288457-A1
Application number	US-201414778543-A
Country	US
Kind code	A1
Filing date	Mar 21, 2014
Priority date	Mar 22, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A damped composite material comprising a damping material, a bonding material structural layer which comprises fibres and a structural resin material.

First claim

1 . A damped composite material comprising a damping material, a bonding material and a structural layer which comprises fibres and a structural resin material.

2 . A damped composite material according to claim 1 wherein the bonding material on the first face of the damping material increases adhesion between the damping material and the prepreg.

3 . A damped composite material according to claim 1 wherein the damping material comprises a vulcanised rubber.

4 . A damped composite material according to claim 1 wherein the damping material has a maximum elongation between 300 and 800% when measured in accordance with ASTM D1456-86(2010) standard test method.

5 . A damped composite material according to claim 1 wherein the damping material is a continuous sheet.

6 . A damped composite material according to claim 1 wherein the bonding material comprises a thermosetting resin, preferably an epoxy resin.

7 . (canceled)

8 . A damped composite material according to claim 1 wherein the damping material has a thickness of 0.1-0.2 mm.

9 . A damped composite material according to claim 1 wherein the fibres comprise glass or carbon fibres having unidirectional alignment.

10 . A damped composite material according to claim 1 wherein the structural resin comprises an epoxy resin.

11 . A damped composite material according to claim 1 wherein the structural resin and fibres comprise a prepreg or semi-preg.

12 . A damped composite material according to claim 1 wherein damping material comprises surface powder or a backing layer.

13 . (canceled)

14 . A damped composite material according to claim 1 wherein bonding material is a thermoset resin film with areal weight of 1 to 50 g/m 2 .

15 . A damped composite material according to claim 1 wherein the damping layer further comprises a surface layer for increasing the surface tack, wherein the surface layer is a thermosetting resin film of areal weight 6 to 10 g/m 2 .

16 . A damped composite material according to claim 1 wherein the bonding material comprises a thermoplastic veil.

17 . (canceled)

18 . (canceled)

19 . A damped composite material according to claim 1 comprising a polymer backing on one or both faces.

20 . A damped composite material according to claim 1 wherein the bonding material comprises resin of the structural layer.

21 . A method for producing a damped composite material comprising:
a structural layer comprising fibres and a structural resin material; a damping material; a bonding material; and a surface layer;
comprising the steps of:
a) combining a bonding material with a first face of the damping material;
b) combining the bonding material and first face of the damping material with the structural layer; and
c) combining surface layer with the second face of the damping material.

22 . A method for producing a damped composite material according to claim 21 wherein the damping material is supplied with a powder coating, and the bonding material and/or surface layer are applied without removing the powder.

23 . (canceled)

24 . A method for producing a damped composite material according to claim 21 wherein the bonding material is applied to damping material prior to combining with structural layer.

25 . A method for producing a damped composite material according to claim 21 wherein the bonding material is applied to structural layer before combining with the damping material.

26 . (canceled)

27 . (canceled)

Assignees

• Hexcel Composites Ltd

Inventors

• Ellis John
• Hadley Philip

Classifications

• B32B2260/046

  Synthetic resin · CPC title

• B32B2305/076

  Prepregs · CPC title

• B32B25/10

  next to a fibrous or filamentary layer · CPC title

• B32B2307/102

  Insulating · CPC title

• B32B2605/18

  Aircraft · CPC title