Moisture resistant, repulpable paper products and method of making same
AssigneeEvCo Research LLC
InventorScott O. Seydel
Life of this patent
Estimating the term…
Abstract
Hydrogenated triglycerides having melting points above 50° C. are substituted for paraffin as a coating material for the surface of paper products and the resulting paper products have improved wet strength and moisture resistance in addition to being repulpable thereby providing a distinct environmental advantage over paraffin coated products.
Claims20
A repulpable moisture resistant paper product comprising:
- a) a paper substrate having a surface;
- b) a coating on said surface, said coating comprising a hydrogenated triglyceride having a minimum melting point of at least about 50° C.;
- c) said coating imparting improved moisture resistance and wet strength to said paper;
- and
- d) said coated paper being repulpable and recyclable.
The repulpable moisture resistant paper product wherein the melting point of the hydrogenated triglyceride is in the range from about 55° C. to about 65° C.
In the process of making a moisture resistant paper product the improvement comprising the steps of:
- a) providing a paper product with surface to be coated;
- and
- b) coating said surface with a hydrogenated triglyceride having a melting point of at least about 5020 C.
A process of making paper from a coated, moisture resistant paper product comprising the steps of:
- a) providing a paper product having a surface coated with a hydrogenated triglyceride having a melting point above about 50° C.;
- b) repulping said paper product and reclaiming the pulp fibers;
- and
- c) including said reclaimed pulp fibers in the pulp stock for a paper making process.
A process of moisture-proofing a water absorbent surface material by applying a coating of a hydrogenated triglyceride having a minimum melting temperature of about 50° C. to said surface.
Dependencies are inferred from the claim text.