The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 1984
Filed:
Jul. 08, 1983
Larry Ballard, Columbia, SC (US);
Shakespeare Company, Columbia, SC (US);
Abstract
The invention disclosed herein provides a process for the high temperature extrusion of polyvinyl alcohol monofilament soluble in water comprising the steps of blending from about 80 to 98 percent by weight polyvinyl alcohol resin having a number average molecular weight of from about 10,000 to 200,000 and a degree of hydrolysis of from about 85 to 91 percent with from about 20 to 2 percent by weight of a plasticizer selected from the group consisting of hydroxyethers, diols, triols and other polyols and mixtures thereof, reducing the moisture content of the resin to a level of less than about one percent and the volatile content thereof to a level of less than about two percent and, melt extruding the blend to form monofilaments. A novel high temperature extruded polyvinyl alcohol monofilament, soluble in water, comprises from about 80 to 98 percent by weight polyvinyl alcohol resin having a number average molecular weight of from about 10,000 to 200,000 and a degree of hydrolysis of from about 85 to 91 percent and from about 20 to 2 percent by weight of a plasticizer selected from the group consisting of hydroxyethers having an average molecular weight of less than 325 and greater than 550 and having the formula ##STR1## wherein R is hydrogen or methyl and R.sub.1 is hydrogen, an alkyl group having from one to about 12 carbons and aromatic groups having from six to about 10 carbon atoms and n is an integer that will provide the aforementioned average molecular weight, diols, triols and other polyols having from two to about 10 carbons including mixtures thereof.