Long fiber thermoplastic formed with recycled and renewable content
US9499688B2 · kind B2 · utility
1Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2013 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | Apr 17, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2207/20
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A molding composition formulation is provided that includes polypropylene, glass fiber, and a polypropylene substitute including recycled sheet molding composition transfer film. The polypropylene substitute is present from 1 to 35 total weight percent also may include natural cellulosic fibers or powders. A process is provided by which the polypropylene substitute is mixed and homogenized and then mixed with polypropylene and additives, and thereafter glass fiber. A reduction in the amount of virgin polypropylene used is reduced compared to conventional thermoplastic glass fiber filled moldings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.