Patent · US Expired

Thin walled tubing formed of a melt spinnable synthetic polymer and process for the manufacturing thereof

US4305983A · kind A · utility

12Cited by

6References

18Claims

0Family size

Assignee

Akzo N.V. · NL

Inventors

Hans Hoppe · Weingarten, DE
Karl Ostertag · Zell am Harmersbach, DE

Key dates

Filing date	Sep 21, 1979
Grant date	Dec 15, 1981
Priority date	—
Expiry date	Sep 21, 1999

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2975
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Thin walled tubing formed of a melt spinnable synthetic polymer having a flow-through cross-section amounting to 30 to 95% of the total tubular cross-section and a breaking elongation of less than 100% prepared by melt spinning a synthetic polymer so as to form a tube and then drawing off the tube thus formed at a velocity which is greater than 3500 m/min. Preferably the process is carried out under utilization of the phenomena of natural fiber bending whereby the distance between the spinning means and the take-off means can be decreased.

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