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. 31, 1978
Filed:
Mar. 17, 1977
August J Van Paesschen, Antwerp, BE;
Lucien J Van Gossum, Kontich, BE;
Agfa-Gevaert N.V., Mortsel, BE;
Abstract
The adherence of hydrophilic layers to dimensionally stable polyester films is improved by means of an adhesive layer by a process comprising applying the adhesive layer to an at most monoaxially stretched polyester film, stretching the thus covered polyester film biaxially or in a direction perpendicular to the first stretching direction and heat-setting the thus treated film at 180.degree.-225.degree. C, whereafter a hydrophilic coating is applied to the heat-set adhesive layer. This adhesive layer consists essentially of about 25-60% by weight of a chlorine-containing copolymer, 15-40% by weight of a butadiene copolymer, and 2-10% by weight of a water-soluble melamine-formaldehyde or hydandoin-formaldehyde resin and is free of gelatin.