Aqueous based image receptive coating and process for producing same
AssigneeA*Ware Technologies, L.C.
InventorsDerric T. Overcash, Richard C. Wallace
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Abstract
This invention relates to an economical coating composition for porous substrates that provides extremely glossy surfaces, is capable of supporting holographic images, provides good oxygen barrier properties as well as good oil, grease, solvent and water resistance. Said coatings on paper substrates are printable, biodegradable, recyclable, and repulpable. They are also suitable for use in conjunction with food products. This invention also relates to a process for applying said coatings onto porous substrates as well as a process for the economical production of inexpensive holographic images on substrates such as paper and cardboard containers.
Claims28
A method for forming a high gloss coating on a porous substrate comprising the steps of
- (a) forming a high gloss coating composition by blending a waterborne, crosslinkable polymer that is resistant to water penetration when dried and cured with a water dispersible film forming polymer of at least 5,000 molecular weight in an aqueous medium;
- (b) applying said high gloss coating composition onto a smooth non-porous surface of a carrier substrate so as to provide a uniform, pin hole free coating at a rate equal to or greater than 0.3 lbs per 1000 square feet of carrier surface;
- (c) partially or fully curing said coating;
- and
- (d) transferring the cured high gloss coating from the carrier to the surface of a porous sheet material so as to provide a coated sheet material with a gloss rating equal to or greater than about 50.
A method for making a holographic image supporting coating on the surface of a porous substrate sheet material comprising the steps of
- (a) forming a coating composition by blending a waterborne, crosslinkable polymer that is resistant to water penetration when dried and cured with a water dispersible film forming polymer of at least about 5,000 molecular weight in an aqueous medium;
- (b) applying said coating composition onto a carrier substrate wherein said carrier surface has inscribe etchings or embossed patterns capable of providing a holographic image, wherein said coating is applied so as to provide a uniform, pin hole free coating at a rate equal to or greater than 0.4 lbs per 1000 square feet of etched or embossed carrier surface;
- (c) partially or fully curing said coating sufficiently to allow the coating to form a casting of the imprint on the carrier surface;
- and
- (d) transferring the cured coating, with the imprint of the carrier surface, from the carrier to at least one surface of a porous sheet material so as to produce a holographic image on the surface of said sheet material.
Dependencies are inferred from the claim text.