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US 2018/0009153 A1Published application
Polymeric Material for Container
AssigneeBerry Plastics Corporation
InventorsDavid Dezhou Sun, Philip A. Driskill, Rolland Strasser
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Abstract
A formulation for producing a polymeric material including polypropylene, a chemical blowing agent, and optional components as described.
Claims20
A method of forming an insulative cellular non-aromatic polymeric container comprising the steps of
- heating a mixture of
- at least 85% (w/w) of at least one polypropylene resin,
- up to about 15% (w/w) of at least one nucleating agent, and
- injecting a blowing agent into the mixture,
- extruding the mixture to form a core layer,
- extruding a skin layer on the core layer to establish a multi-layer parison, and
- blow molding the multi-layer parison with air to form an insulative cellular non-aromatic container,
- wherein the multi-layer parison has a density of about 0.4 g/cm3 to about 0.8 g/cm3.
5 more elements
The method of claim 14, wherein the ratio of the two polypropylene base resins is 50% to 50%.
A method of forming an insulative cellular non-aromatic polymeric container comprising the steps of
- heating a mixture of
- at least 85% (w/w) of at least one polypropylene resin,
- up to about 15% (w/w) of at least one nucleating agent, and
- injecting a blowing agent into the mixture,
- extruding the mixture to form a core layer,
- extruding a skin layer on the core layer to establish a multi-layer structure, and
- using the multi-layer structure to form an insulative cellular non-aromatic container,
- wherein the multi-layer structure has a density of about 0.4 g/cm3 to about 0.8 g/cm3.
5 more elements
Dependencies are inferred from the claim text.