US 11,745,439 B2
Hybrid veil as interlayer in composite materials
Carmelo Luca Restuccia, Chester (GB); and Robert Blackburn, Hull (GB)
Assigned to CYTEC INDUSTRIES INC., Princeton, NJ (US)
Appl. No. 15/771,532
Filed by CYTEC INDUSTRIES INC., Princeton, NJ (US)
PCT Filed Nov. 11, 2016, PCT No. PCT/US2016/061506
§ 371(c)(1), (2) Date Apr. 27, 2018,
PCT Pub. No. WO2017/083631, PCT Pub. Date May 18, 2017.
Claims priority of provisional application 62/254,224, filed on Nov. 12, 2015.
Prior Publication US 2018/0311912 A1, Nov. 1, 2018
Int. Cl. B29C 70/02 (2006.01); B29C 70/54 (2006.01); B29C 70/00 (2006.01); B29C 70/08 (2006.01); B29C 70/16 (2006.01); B29C 70/30 (2006.01); B29C 70/50 (2006.01); B32B 5/02 (2006.01)
CPC B29C 70/025 (2013.01) [B29C 70/003 (2021.05); B29C 70/08 (2013.01); B29C 70/16 (2013.01); B29C 70/30 (2013.01); B29C 70/50 (2013.01); B29C 70/547 (2013.01); B32B 5/022 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A hybrid veil that is flexible, self-supporting, and is permeable to liquid and gas, comprising:
(a) intermingled, randomly arranged carbon fibres in the form of a nonwoven structure;
(b) polymeric particles dispersed throughout the nonwoven structure, wherein a majority of the polymeric particles are penetrating through the thickness of the nonwoven structure; and
(c) a polymeric or resinous binder present throughout the veil,
wherein the fibres of the nonwoven structure are chopped fibres having lengths in the range of about 3 mm to about 18 mm and cross-sectional diameters in the range of about 3.0 μm to about 15 μm, and
wherein the particles are polyamide or polyimide particles consisting of polyamide or polyimide.