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 |
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.
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