Back to results
US 9,422,424 B2Granted
Consistent slip masterbatch for polyethylene films
AssigneeIngenia Polymers Corp.
InventorsSushant D. Roy, Edward G. Hindy
Life of this patent
Estimating the term…
Abstract
A masterbatch of additives is useful for maintaining a constant and reduced coefficient of friction in polyethylene (PE) based films. The masterbatch is a compounded blend of siloxane additive in conjunction with a mineral, a cyclic olefin copolymer and, optionally, an antioxidant. These additives are different from the polar additives used in the past to reduce COF of PE films and do not have inherent incompatibility with the nonpolar PE matrix.
Claims24
An additive blend, comprising:
- a siloxane formulation, in an amount of about 30% to about 50% by weight of the additive blend, wherein the siloxane formulation comprises siloxane in an amount of about 50% by weight of the siloxane formulation;
- cyclic olefin copolymer (COC), in an amount of about 50% to about 70% by weight of the additive blend;
- mineral additive, in an amount of about 9 to about 10% in the additive blend;
- and
- one or more antioxidants in an amount of about 0.1% to about 1% by weight of the additive blend.
2 more elements
A polyethylene based film, comprising:
- polyethylene;
- and
- an additive blend, wherein the additive blend is dispersed throughout at least a portion of the polyethylene, wherein the additive blend comprises a siloxane formulation, cyclic olefin copolymer (COC), mineral additive, and one or more antioxidants, wherein the siloxane formulation comprises siloxane and polyethylene, and wherein the polyethylene based film has a dynamic coefficient of friction of about 0.25.
A method for preparing a polyethylene based film, comprising:
- preparing an additive blend, wherein the additive blend comprises a siloxane formulation, cyclic olefin copolymer (COC), mineral additive, and one or more antioxidants, and wherein the siloxane formulation comprises siloxane and polyethylene;
- dispersing the additive blend in polyethylene to faun modified polyethylene;
- and
- forming the modified polyethylene into a polyethylene based film, wherein the polyethylene based film has a dynamic coefficient of friction of about 0.25.
1 more element
Dependencies are inferred from the claim text.