Back to results
US 11,891,488 B2Granted
Polypropylene sheets and articles
AssigneeBerry Global, Inc.
InventorsYucheng Peng, Jonathan Eickhoff, Ryan Dewig, Jeffrey A. Mann, Debra R. Wilson
Life of this patent
Estimating the term…
Abstract
A sheet of polymeric material is made using an extruding process and articles are formed from the sheet of polymeric material. The sheet of polymeric material and the articles comprise one or more polypropylene resins. In some embodiments, the sheet of polymeric material and the articles formed form the sheet of polymeric material are transparent.
Claims19
A sheet made of polymeric materials, the sheet comprising
- a polypropylene base resin that comprises rubber, wherein the polypropylene base resin comprises a polypropylene impact copolymer,
- wherein the sheet has a first transparency defined at least by a haze between about 10% and about 50% as measured using ASTM D 1003 procedure B,
- wherein a predetermined portion of the sheet includes stress concentrator joints that extend upwardly away from a body of the sheet, the stress concentrator joints are arranged to move from a first arrangement in which the predetermined portion of the sheet has the first transparency to a second arrangement in which the stress concentrator joints extend downwardly relative to the first arrangement and the predetermined portion of the sheet has a second transparency that is different than the first transparency in response to a downward deformation force being applied to the stress concentrator joints, wherein a haze of the second transparency is greater than the haze of the first transparency so that the predetermined portion is at least partially opaque.
An article made of polymeric materials, the article comprising
- a polypropylene base resin that comprises rubber,
- wherein the article has a first transparency defined at least by a haze between about 10% and about 50% as measured using ASTM D 1003 procedure B,
- wherein the article includes a body and a deformable feature that extends away from the body, the deformable feature of the article is arranged to move from a first arrangement in which the deformable feature has the first transparency to a second arrangement in which the deformable feature has a second transparency that is different than the first transparency in response to a downward deformation force being applied to the deformable feature.
Dependencies are inferred from the claim text.