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US 5,177,840 AGranted
Production of hybrid yarn
AssigneeBASF SE
InventorRegina Laws
Life of this patent
Estimating the term…
Abstract
Hybrid yarn is produced from thermoplastic and reinforcing fibers by spreading the fibers separately to form a band and combining and homogeneously intermixing the two bands on rolls or rods. The spreading is carried out in such a way that the reinforcing fiber band will be from 20 to 100% wider than the thermoplastic fiber band. The hybrid yarn can be sized and processed into fabrics which can be molded to produce fiber composites.
Claims8
A process for the preparation of hybrid yarn containing continuous reinforcing fibers and continuous thermoplastic fibers, comprising the steps of:
- a) spreading a first thermoplastic fiber bundle to form a band of thermoplastic filaments;
- b) spreading a second reinforcing fiber bundle to form a band of reinforcing filaments, the width of said second band being from 20 to about 100 percent greater than the width of the first band of thermoplastic filaments;
- c) homogeneously intermixing said bands;
- and
- d) sizing said bands and recompacting the bundles into a bundle of compact cross-section.
2 more elements
Dependencies are inferred from the claim text.