Method of prepregging with resin and novel prepregs produced by such method
AssigneePolycomp, Inc.
InventorJoel A. Dyksterhouse
Life of this patent
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Abstract
Disclosed is a process of forming a prepreg material having substantially no voids. According to the process of the invention, the reinforcing material is heated to a temperature above the temperature of the impregnating resin. The prepreg formed has substantially no voids and does not require lengthy consolidation when formed into useful articles.
Claims47
A process for preparing a reinforced matrix resin composition, comprising the steps of:
- (a) heating a fibrous reinforcing material to a first temperature,
- (b) when heated, contacting said reinforcing material with a resin composition at a second temperature;
- wherein the first temperature is greater than said second temperature.
A prepreg material formed by a step of impregnating a fibrous reinforcement at a first temperature with a resin composition at a second temperature, wherein the first temperature is greater than said second temperature, and further wherein said prepreg material has substantially no voids.
An apparatus for preparing a reinforced matrix resin composition, comprising a heater for heating a fibrous reinforcing material to a first temperature and a container having an inlet and an outlet for the heated fibrous reinforcing material in which the heated reinforcing material is contacted with a resin composition;
- wherein the first temperature, as measured at said inlet, is above the melting point, softening point, or Tg of the resin composition.
An apparatus for preparing a reinforced matrix resin composition, comprising a heater for heating a fibrous reinforcing material to a first temperature and a compressing unit for pressing the heated fibrous reinforcing material together with a resin composition;
- wherein the first temperature, as measured at the point where the heated fibrous reinforcing material is first brought into contact with the resin composition, is above the melting point, softening point, or Tg of the resin composition.
Dependencies are inferred from the claim text.