Patent · US Active

Method and apparatus for heating nonwoven webs

US8129297B2 · kind B2 · utility

0Cited by

10References

7Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

John Cleary · Hockessin, US
Michael Davis · Midlothian, US
Todd McCoy · Hendersonville, US
Edgar N. Rudisill · Nashville, US

Key dates

Filing date	Jul 29, 2002
Grant date	Mar 6, 2012
Priority date	—
Expiry date	Aug 7, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/641
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for drying/heat-treating nonwoven webs in which the web is partially dried under tension in a first drying zone and further heat treated under low tension or in a substantially tensionless state a second drying zone. The process significantly reduces the occurrence of stretch-type defects in the nonwoven webs.

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