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Application US20190249369
Published 2019-08-15
Recyclable Composition For Waterproofing Paper Utilizing A Plant Derived Wax, Pellets Of The Composition, Recyclable Waterproof Paper Laminate Including The Composition, Recyclable Hot Beverage Cup Including The Laminate, Pod For Making Hot Beverages Including The Laminate, And Drinking Straw Including The Laminate
A composition that includes plant derived wax having a melting point of at least 70° C. can be used to waterproof cellulose based materials like paper and board. Suitable waxes include sugarcane wax and rice-bran wax. A surfactant such as stearic acid improves the adhesion of the composition to the underlying material. The resulting waterproof laminate can be economically recycled. Hot beverage cups made from the laminate are waterproof and recyclable without first being separated into components. Coffee pods and drinking straws that are waterproof and recyclable are manufactured with the waterproof laminate.
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USPTO Full Text Publication >
- 1. A composition for waterproofing paper, comprising:
a first plant-derived wax having a melting point above 70° C.; and a second plant-derived wax having a melting point above 70° C.
- 15. A pellet for use in a PET pellet machine, comprising:
a pellet having a size with a five-millimeter diameter; said pellet including a plant-derived wax having a melting point above 70° C.
- 18. Pellets of a composition for waterproofing paper made according to a method, which comprises:
grinding a first plant derived wax having a melting point above 70° C.; grinding a second plant derived wax having a melting point above 70° C.; grinding a surfactant; mixing said rice bran wax, said sugarcane wax, and said calcium stearate into a mixture after grinding; extruding said mixture; and chopping said mixture after extruding into pellets.
