Vehicle components formed with epoxidized chopped glass bonded to a thermoset matrix
A process is provided for molding a resin matrix around a distribution of well distributed epoxy coated glass fibers to produce an article. The article is mass produced by the molding process based on a one or more layer structure, with an outer panel having a high degree of surface smoothness common to automotive body panels and a comparatively high tensile strength joinder thereto. The epoxy coated glass fibers are present in a single panel of an article or all such panels of a multiple layer article. The epoxy coated glass fibers can be present in an articles in a form of: chopped glass fibers that are intermixed and vary in orientation, a woven roving containing predominately epoxy glass fibers with carbon fibers dispersed there through, or non-woven fiber mats.
1. A dual layer cured composite article comprising:
an outer part having an outer part thickness composed of a first resin matrix having between 50 and 70 total weight percent of said outer part of an outer part mixed fiber filler, said mixed fiber filler having an outer part primary fiber:carbon fiber ratio of 0.05-20:1;
an inner part complementary to said outer part and having an inner part thickness composed of a second resin matrix having between 40 and 60 total weight percent of said inner part of an inner mixed fiber filler, said inner mixed fiber filler having an inner part primary fiber:carbon fiber ratio of less than said outer part primary fiber:carbon fiber ratio, the inner part primary fiber being epoxy coated glass fibers; and
a joinder between said outer part and said inner part.
2. The article of claim 1 wherein said outer part mixed fiber filler are a woven fabric or a nonwoven fabric of combined primary fiber and carbon fiber.
3. The article of claim 1 wherein said outer part mixed fiber filler are chopped fibers from a combined tow of primary fiber and carbon fiber.
4. The article of claim 3 wherein said chopped fibers have a length of between 10 mm and 100 mm.
5. The article of claim 3 further comprising a thermoplastic overmolding defining a preform.
6. The article of claim 1 wherein said inner part mixed fiber filler are chopped fibers.
7. The article of claim 1 wherein said outer part primary fiber:carbon fiber ratio is 0.6-1.3:1.
8. The article of claim 1 wherein said outer part has a density of 1.1 to 1.3.
9. The article of claim 1 wherein said inner part has a density of 1.1 to 1.6.
10. The article of claim 1 wherein said outer part is adapted to receive an automotive body panel surface gloss.
11. The article of claim 1 wherein said joinder is a contact adhesive.
12. The article of claim 1 having a shape of a vehicle deck lid, a vehicle door, a vehicle roof, a vehicle fender, or a vehicle floor.
13. The article of claim 1 wherein carbon fiber in said inner is recycled.