Film clarity and rheological breadth in polyethylene resins
AssigneeFina Technology, Inc.
InventorsMichael McLeod, Gerhard Guenther, Nguong van Nguyen
Life of this patent
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Abstract
A method of modifying a polyethylene material is accomplished by providing a polyethylene resin. The initial rheological breadth of the polyethylene resin is determined. The resin is then modified to adjust the rheological breadth of the polyethylene from the initial rheological breadth to a different rheological breadth that corresponds to a desired resin property, such as haze. A method for predicting clarity and rheological breadth properties is also provided, which utilizes a template of measured properties for polyethylene resins.
Claims18
A method of modifying a polyethylene material comprising:
- providing a polyethylene resin;
- determining the initial rheological breadth of the polyethylene resin;
- and
- modifying the resin to adjust the rheological breadth of the polyethylene from the initial rheological breadth to a different rheological breadth that corresponds to a desired resin property.
A method of modifying a polyethylene material to change haze properties of the material, the method comprising providing a polyethylene resin and modifying the resin to adjust the rheological breadth of the resin so that the modified resin exhibits a haze that is different than that of the unmodified resin when formed into a film or sheet.
A method for predicting haze properties in a polyethylene resin material comprising:
- determining the rheological breadth of a polyethylene resin of interest;
- providing a polyethylene resin template of measured rheological breadths having corresponding measured haze properties;
- matching the rheological breadth of the polyethylene resin of interest to a corresponding rheological breadth from the polyethylene resin template;
- and
- determining the corresponding measured haze properties from the polyethylene resin template.
A method for predicting rheological breadth properties in a polyethylene resin material comprising:
- determining the clarity of a polyethylene resin;
- providing a polyethylene resin template of measured clarity having corresponding measured rheological breadth properties;
- matching the clarity of the polyethylene resin of interest to a corresponding clarity from the polyethylene resin template;
- and
- determining the corresponding measured rheological breadth properties from the polyethylene resin template.
Dependencies are inferred from the claim text.