Process for producing polyvinyl alcohol articles

摘要

The present invention relates to novel polyvinyl alcohol non-woven films and fabrics which have been modified so as to have a breathable coalesced lower porosity surface polyvinyl alcohol layer attached to a fibrous polyvinyl alcohol layer by a transition layer. The fabrics are useful as clothing or wraps for inert articles.

主权项

1. A non-woven breathable polyvinyl alcohol article comprising
three polyvinyl alcohol layers each formed from a common fibrous polyvinyl alcohol material, the article comprising:
a first layer consisting of the fibrous polyvinyl alcohol material as coalesced to have a reduced porosity relative to the fibrous polyvinyl alcohol material, and that is more susceptible to thermal transfer than the fibrous polyvinyl alcohol material;a second layer consisting of the fibrous polyvinyl alcohol material in an unmodified state and having a higher porosity than the first layer; anda transition layer interposed between the second layer of fibrous polyvinyl alcohol and the first layer and formed during modification of the fibrous polyvinyl alcohol to make the first layer, wherein the transition layer comprises a mixture of the fibrous polyvinyl alcohol and coalesced polyvinyl alcohol; wherein the article comprises polyvinyl alcohol from the fibrous polyvinyl alcohol material extending throughout the first layer and transition layer.