Patent · US Expired

Granules of fiber-reinforced thermoplastic

US5700556A · kind A · utility

1Cited by

13References

19Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Detlef Skaletz · Mainz, DE
Horst Heckel · Mainz, DE
Bruno Wagner · Brechen, DE
Joachim Heydweiller · Gerolzhofen, DE

Key dates

Filing date	Jun 7, 1995
Grant date	Dec 23, 1997
Priority date	—
Expiry date	Jun 7, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2998
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In granules of fiber-reinforced thermoplastic material, a multiplicity of individual filaments of the reinforcing fiber (e.g. glass) are arranged in parallel in a matrix of the thermoplastic material (e.g. polypropylene). The fiber length corresponds to the granule length and is in the range from 3 mm to 8 mm. The melt viscosity of the thermoplastic material is above 100 Pa.s, the diameter of the granules (measured perpendicular to the fiber direction) is 1.7 to 5 mm and the ratio diameter:length of the granules is 0.4 to 1.66.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.