Back to results
US 2010/0170620 A1Published application
Prepregs for use in building lay-ups of composite materials and processes for their preparation
AssigneeHexcel Holding GmbH
InventorsStephan Kruger, Gerhard Entholzer
Life of this patent
Estimating the term…
Abstract
The invention concerns a process for making a scrim-reinforced prepreg for use in building low-porosity lay-ups, characterized in that a conventional prepreg is formed of a fibrous reinforcement and a heat-curable resin, the prepreg having suitable viscosity and sufficient tackiness to hold a scrim which is adhered to the prepreg by applying light pressure, so that the scrim is impressed onto the prepreg to such a degree, that less than half of the circumference of the scrim strands becomes coated by the prepreg-resin.
Claims19
A method for making a scrim-reinforced prepreg comprising the steps of:
- providing a first prepreg ply comprising a fibrous reinforcement located in a heat-curable resin matrix, said first prepreg ply having a surface;
- providing a second prepreg ply comprising a fibrous reinforcement located in a heat-curable resin matrix, said second prepreg ply having a surface;
- locating a scrim between said first prepreg ply and said second prepreg ply, said scrim comprising a plurality of strands that form a grid of parallelograms comprising warp direction strands and strands that are crosswise to said warp direction strands;
- and
- pressing the surfaces of said first and second prepreg plies against said scrim so as to provide air escape channels that are located between the surfaces of said first and second prepreg plies and along said plurality of strands to form a grid of channels through which air can escape from said scrim-reinforced prepreg.
2 more elements
Dependencies are inferred from the claim text.