Repulpable corrugated box and process for making same
AssigneeInterstate Corrpack LLC
InventorsPete Bugas, Lawrence C. Nykwest, Scott Stoltzmann
Life of this patent
Estimating the term…
Abstract
A repulpable moisture resistant poultry box having a composite structure with a fluted medium, a top backing board secured to one side of the fluted medium and a bottom backing board secured to the other side of the fluted medium. The backing boards and the fluted medium are impregnated with a hydrogenated triglyceride. The backing boards each have an outer surface coated with an emulsion of hydrogenated triglyceride and styrene acrylic to provide moisture resistance repulpable and recyclable box.
Claims23
A repulpable moisture resistant paper product comprising a composite corrugated paper structure with a fluted medium, a top paper backing liner secured to one side of said fluted medium and a bottom paper backing liner secured to the other side of said fluted medium, with at least one of said paper backing liners and said fluted medium being impregnated with a hydrogenated triglyceride or a blend of natural, partially and fully hydrogenated triglycerides, at least one of said impregnated paper backing liners having an outer surface coated with an emulsified mixture of styrene acrylic copolymer and hydrogenated triglyceride to provide moisture resistance and wet strength to said paper product, said paper product being repulpable, recyclable and compostable.
(canceled)
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A wax free repulpable recyclable moisture resistant paper box intended for use in wet food processing conditions comprising a corrugated paper product having a composite structure with a fluted medium and liner sheets secured to each side of said fluted medium, said liner sheets and fluted medium being impregnated with vegetable hydrogenated triglyceride and said liner sheet's outer surfaces being coated with an emulsified mixture of styrene acrylic copolymer and hydrogenated triglyceride, said coating having a hydrogenated triglyceride content ranging from about 5% to about 25% by wet coating weight and a pH ranging from about 8 to about 9, imparting improved moisture resistance and wet strength to said paper box allowing said paper box to be repulpable and recyclable.
(canceled)
A process for making a repulpable and recyclable poultry box comprising the steps of:
- a). impregnating a corrugated paper medium with hydrogenated triglyceride;
- b). impregnating a first paper liner board with hydrogenated triglyceride;
- c). impregnating a second paper liner board with hydrogenated triglyceride;
- d). coating said impregnated first paper liner board with a coating of emulsified styrene acrylic co-polymer and hydrogenated triglyceride on one side;
- e). coating said impregnated second paper liner board with a coating of emulsified styrene acrylic co-polymer and hydrogenated triglyceride on one side;
- f). securing said first impregnated and coated liner board, said impregnated corrugated medium and said second impregnated and coated liner board together with an adhesive to form a composite sheet;
- and
- e). curing said composite sheet with a dryer to cure said adhesive.
Dependencies are inferred from the claim text.