Method of recycling carbon fiber prepreg waste

Patent metadata

Field	Value
Publication number	US-10328610-B2
Application number	US-201715680981-A
Country	US
Kind code	B2
Filing date	Aug 18, 2017
Priority date	Aug 18, 2017
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

The method of recycling carbon fiber prepreg waste includes collecting uncured carbon fiber prepreg waste, where the carbon fiber prepreg waste still includes the backing film associated with the carbon fiber prepreg (typically in the form of a colored polyethylene layer). The uncured carbon fiber prepreg waste is then shredded and inserted into either an open or a closed mold. The mold is then inserted into a hot press, where the shredded carbon fiber prepreg waste is cured under selected temperature and pressure for a selected period of time, dependent upon the particular volume of waste and the desired recycled product. Alternatively, the shredded carbon fiber prepreg waste may be rolled in a hot metallic roller or extruded in a hot melt extruder.

First claim

We claim:

1. A method of recycling carbon fiber prepreg waste, comprising the steps of:
shredding a volume of carbon fiber prepreg waste, wherein the carbon fiber prepreg waste includes a backing film associated with the carbon fiber prepreg;
providing a mold, wherein the mold has interior surfaces adapted to receive the the volume of carbon fiber prepreg waste;
lining the interior mold surfaces with a release agent;
filling the mold with the shredded volume of carbon fiber prepreg waste;
providing a hot press;
heating the hot press for 30 minutes at 100° F.;
inserting the mold into the hot press;
curing the shredded volume of carbon fiber prepreg waste in the hot press to produce a recycled element, wherein the curing is at a predetermined pressure and at a temperature of 270° F. and for 30 minutes; and
removing the mold from the hot press and letting it cool at room temperature.

2. The method of recycling carbon fiber prepreg waste as recited in claim 1 , wherein the step of filling the mold with the shredded volume of carbon fiber prepreg waste comprises filling an open mold with the shredded volume of carbon fiber prepreg waste.

3. The method of recycling carbon fiber prepreg waste as recited in claim 1 , wherein the predetermined pressure is 1500 lbs.

4. The method of recycling carbon fiber prepreg waste as recited in claim 1 , wherein the step of filling the mold with the shredded volume of carbon fiber prepreg waste comprises filling a closed mold with the shredded volume of carbon fiber prepreg waste.

5. The method of recycling carbon fiber prepreg waste as recited in claim 1 , wherein the release agent is wax coated aluminum foil.

Assignees

• Univ United Arab Emirates

Inventors

• Ahmed Waleed K
• Hilal-Alnaqbi Ali
• Almazrouei Aamna Salem Saeed
• Almarzooqi Lamia Aziz Alh Mohamed
• Al Jamal Dina
• Genena Farah Ashraf Ahmed

Classifications

• B29C48/91

  Heating, e.g. for cross linking · CPC title

• B29B17/0042 Primary

  for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic · CPC title

• B29K2105/0872

  Prepregs · CPC title

• B29C48/277

  of materials · CPC title

• B29B2017/0468

  Crushing, i.e. disintegrating into small particles · CPC title