Thermally reversible polymer sheets and method of forming the sa

Details Thermally reversible polymer sheets and method of forming the sa Thermally reversible polymer sheets and method of forming the sa

1989-04-21

1993-06-15

Nutter, Nathan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 65, 528 76, C08G 1881, C08G 1810, C08G 1832, C08G 1852

Patent

active

052199746

ABSTRACT:
The invention provides fibers and sheets formed from a polymer having a thermally reversible bond which is adapted to evanesce at an elevated temperature and revert to a thermally reversible bond upon cooling to ambient temperature so that said polymer is adapted, upon being heated to said elevated temperature, to dissociate into melt processable polymer fragments and, upon being cooled from said elevated temperature to ambient temperature, to re-associate. The polymer fibers may be meltblown fibers which may be formed into a coherent nonwoven web or sheet. The meltblown fibers may include microfibers. The meltblown web may also include at least one type of secondary fiber, particulates or a mixture of fibers and particulates.

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S. Petersen, Annalen, 562, 205 (1949) (Chemical Abstracts, vol. 44, cols. 115-118).
Y. Iwakura and K. Hayashi, Yuki Gosei Kagaku Kyokai Shi, 16, 533 (1958) (Abstract).

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