Process For Preparing An Elastic Nonwoven Web
Patent #: 7,713,894
Inventor(s): De-Sheng Tsai and Te-Hsin Tsai
Company: E.I. Dupont De Nemours and Company
Patented recently is a process of preparing an elastic thermally bonded nonwoven web, whereby the process is characterized by the following steps: (i) providing a thermally bonded nonwoven precursor web containing thermoplastic fibers, (ii) subjecting the precursor web of step (i) to a drawing treatment in a machine direction at a drawing rate of from 45 to 70%, and a strain rate within a range of from 1000 to 2400%/min at a temperature between the softening point and the melting point of the fibers for preparing the elastic thermally bonded nonwoven web.
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