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Browse Prior Art Database

Subbing Composition for Polyester Supports

IP.com Disclosure Number: IPCOM000093555D
Original Publication Date: 1967-Nov-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Gipstein, E: AUTHOR

Abstract

A polymeric coating can be applied to the surface of an untreated polyethylene terephthalate film by an acid or alkali etch.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

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Subbing Composition for Polyester Supports

A polymeric coating can be applied to the surface of an untreated polyethylene terephthalate film by an acid or alkali etch.

The untreated polyethylene terephthalate film is coated with a thin layer 0.1 - 0.3 microns, of a polyester adhesive, such as adhesives 46910, 46950 manufactured by E. I. du Pont de Nemours and Co. or VITEL* adhesives 100, 200 end 207. The coating is applied by bead or meniscus coating from a 1-3% solution of the adhesive in a solvent such as tetrahydrofuran. The coating is allowed to air dry for about 10 minutes before applying the polymeric coating.

Next, the polymeric coating, such as cellulose acetate butyrate, polystyrene, polymethylecrylate, polyvinylacetate, polyvinylchloride, polyvinylcarbazole, end polysulfone is applied from a 5-10% solution in a solvent such as tetrahydrofuran by kiss coating to the desired thickness, e.g., 12-15 microns. The solvent used in this step must be able to be volatilized at the temperature used for drying so that the finished coating is not sticky or tacky.

The adhesion of the layers to each other and to the polyethylene terephthalate is excellent. Also, the optical clarity of the coated film is the same as that of the uncoated film. *Trademark of Goodyear Tire and Rubber Co.

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