Process of making resin-impregnated material webs
OwnerKurt Heldinventor
Life of this patent
Estimating the term…
Abstract
The invention is directed to an apparatus and process for the continuous fabrication of resin impregnated material webs in which low-solvent resin is extruded to form a film which is joined with the material web to form a layer formation, or the resin is spread on the material web. The layer formation is subsequently subjected to an area pressure. The apparatus including an extruder or a spreading device, and a continuously operating double band press exerting an area pressure.
Claims28
A process for the continuous fabrication of resin impregnated material webs, comprising the steps of:
- winding off a substantially resin-free material web from a first roll means;
- providing a low-solvent or solvent-free solid resin in the form of flakes or powder, wherein said resin is heat treatable and can be cured by heat, chemical reactions or cooling;
- extruding a film from the resin;
- joining the extruded film with the substantially resin-free material web to form a layer formation;
- and
- subjecting the layer formation to heat and area pressure.
A process for the continuous fabrication of resin impregnated material webs, comprising the steps of:
- winding off a substantially resin free material web from a first roll means;
- providing a low-solvent or solvent-free solid resin in the form of flakes or powder, wherein said resin is heat-treatable and can be cured by heat, chemical reactions or cooling;
- spreading the resin on the substantially resin-free material web;
- and
- subjecting the resin-covered material web to heat and area pressure.
The process of 26, wherein a prepeg is produced and wherein a woven glass fiber web is used as material web and an epoxy resin is used as resin.
Dependencies are inferred from the claim text.