Water resistant, caustically removable coating, paper label and recyclable labeled glass bottle
AssigneeConsolidated Papers, Inc.
InventorFuushern Wuu
Life of this patent
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Abstract
A water resistant, caustically removable coating and method for making the same is disclosed. The coating is utilized to make a paper label which is water resistant but can be repulped in conventional caustic bottle washing solution. The coated paper label is applied to a bottle, the bottle used and then recycled using conventional caustic bottle washing solution to remove and repulp the paper label, permitting recycling of the bottle, and if desired, making paper from the recovered pulp.
Claims55
A method for making a water resistant caustically soluble aqueous paper coating to be applied to a top side of a paper label for a glass object recyclable in a caustic washing solution, comprising the steps of mixing with water:
- (a) a binder made of at least 40% caustic-soluble material to provide dissolvability in the caustic washing solution,
- (b) a water repelling agent for adding water repellency to the coating, and
- (c) pigment including one or more of clay, TiO2, calcium carbonate, and calcined clay, for providing opacity and brightness to the coating,
- to a solids level of at least 45%, whereby said paper label coating is water repellent but permits disintegration of the water repellent coating to permit the caustic washing solution to dissolve and repulp the coated paper label from the glass object.
A water resistant, top coating to be applied to a paper label for a glass object recyclable in a caustic washing solution comprising:
- (a) a binder made of at least 40% caustic soluble material to provide dissolvability in the caustic washing solution,
- (b) a water repelling agent for adding water repellency to the coating,
- (c) a pigment, including one or more of clay, TiO2, calcium carbonate, and calcined clay for providing opacity and brightness to the coating, and
- (d) said coating having a solids level of at least 45%,
- whereby said paper label coating is made water repellent but permits disintegration of the water repellent coating to permit the caustic washing solution to remove and repulp the paper label from the glass object.
A method for making a water resistant paper label for a glass object recyclable in a caustic washing solution comprising the steps of:
- forming a label base of paper repulpable in a caustic washing solution, and
- applying a water resistant top coating onto said paper base having a binder dissolvable in caustic washing solution,
- whereby said paper label coating is made water repellent but permits disintegration of the water repellent coating to permit the caustic washing solution to remove and repulp the paper label from the glass object.
A water resistant paper label for a bottle recyclable in a caustic bottle washing solution, comprising:
- a label base of paper repulpable in a caustic bottle washing solution, and
- a top coating applied onto said label base, said top coating having binder dissolvable in caustic bottle washing solution and a water repelling agent to make it water resistant,
- whereby said label top coating is made water repellent but permits disintegration of the water repellent top coating to permit the caustic bottle washing solution to remove and repulp the paper label from the bottle.
A paper labeled glass bottle capable of being recycled in a caustic bottle washing solution, comprising:
- a glass bottle,
- a paper label for said glass bottle including:
- a paper base
- an adhesive to hold said paper base to said bottle
- a water repellent, caustic soluble top coating on said paper base and including a binder providing caustic solubility to said paper label and a water repelling agent providing water repellency to said paper label, and pigment, and
- printing indicia on said upper surface of said paper label,
- whereby said paper label on said bottle may be recycled in caustic bottle washing solution and said binder of said top coating is dissolved to permit said paper label to be repulped by said caustic bottle washing solution at the same time said bottle is washed.
A method of making a paper labeled glass bottle and recycling the paper label, comprising the step of applying caustically dissolvable top coating containing caustically dissolvable binder in a caustic bottle washing solution onto a paper base, printing indicia on said top surface of the label, applying adhesive to one of the bottom of said paper base and said bottle to attach the printed paper label to the bottle, fling the bottle with useful product, consuming the useful product and recycling the glass bottle, including the step of subjecting the paper labeled glass bottle to a caustic bottle washing solution, causing the caustic washing solution to dissolve the top coating and dissolve the paper base to produce paper pulp capable of being made again into paper.
Dependencies are inferred from the claim text.