Low Microgel Surface Protection Film
AssigneeTredegar Film Products Corporation
InventorsCarl Douglas Ray, Shailesh Chunilal Patel, Bankim Bhupendra Desai, James Mason Yourshaw
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Abstract
A method of refining a polymer resin material is provided. The method comprises melting and subjecting the resin material to shear stresses in a range of 250 kPa to 400 kPa to form a refined resin material. The refined resin material may be extruded, solidified and cut into reduced microgel resin pellets, which may be subsequently melted and extruded to form a reduced microgel film.
Claims22
A method of refining a polymer resin material, the method comprising:
- melting and subjecting the resin material to shear stresses in a range of 250 kPa to 400 kPa to form a refined resin material.
A method of forming a polymer film, the method comprising:
- providing a polymer resin material consisting primarily of polyethylene;
- mixing the polymer resin material with one or more antioxidants to form a resin material mixture;
- melting and subjecting the resin material mixture to shear stresses in a range of 250 kPa to 400 kPa to form a refined resin material;
- and
- extruding the refined resin material to form the polymer film.
A resin material consisting essentially of polyethylene, the resin material being substantially free of microgels having a largest dimension greater than 100 microns.
A thermoplastic polymer film consisting essentially of polyethylene, the film being substantially free of microgels having a largest dimension greater than 100 microns.
A multilayer thermoplastic polymer film comprising:
- a release layer defining a first outer film surface;
- and
- an adhesion layer defining a second outer film surface opposite the first outer film surface,
- wherein at least one of the release layer and the adhesion layer consists essentially of polyethylene and is substantially free of microgels having a largest dimension greater than 100 microns.
Dependencies are inferred from the claim text.