Foamed-wall container having a silvery appearance
AssigneePlastic Technologies, Inc.
InventorFrank Semersky
Life of this patent
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Abstract
A container comprises a micro cellular foamed polymer, and a non-reactive gas contained within the micro cellular foam cells, wherein the container has a silvery appearance. The process for making the container comprises injection molding a polymer preform having a non-reactive gas entrapped within the walls thereof, cooling the preform to a temperature below the polymer softening temperature, reheating the preform to a temperature above the polymer softening temperature, and blow molding the preform, to prepare a container comprising a micro cellular foamed polymer having a non-reactive gas contained within the micro cellular foam cells.
Claims30
A container, comprising:
- a micro cellular foamed polymer;
- and
- a non-reactive gas contained within the micro cellular foam cells;
- wherein the container has a silvery appearance.
A container, comprising:
- a micro cellular foamed polymer, comprising one or more of a polyester, polypropylene, acrylonitrile acid ester, vinyl chloride, polyolefin, polyamide, or a derivative or copolymer thereof;
- and
- a non-reactive gas comprising one or more of carbon dioxide, nitrogen, or argon;
- wherein the color of the container is about Pantone Color Formula Guide number 420, 421, 422, 423, 424, 425, 877, 8001, 8400, or 8420.
A container, comprising:
- a micro cellular foamed polyethylene terephthalate;
- and
- a non-reactive gas comprising nitrogen contained within the micro cellular foam cells;
- wherein the color of the container is about Pantone Color Formula Guide number 877.
A process for preparing a container, comprising the steps of:
- injection molding a polymer preform having a non-reactive gas entrapped within the walls thereof;
- cooling the preform to a temperature below the polymer softening temperature;
- reheating the preform to a temperature greater than the polymer softening temperature;
- and
- blow molding the preform, to prepare a container consisting essentially of a micro cellular foamed polymer having a non-reactive gas contained within the micro cellular foam cells;
- wherein the container has a silvery appearance.
A process for preparing a container, comprising the steps of:
- injection molding a preform comprising one or more of a polyester, polypropylene, acrylonitrile acid ester, vinyl chloride, polyolefin, polyamide, or a derivative or copolymer thereof, the preform having a non-reactive gas comprising one or more of carbon dioxide, nitrogen, or argon entrapped within the walls thereof;
- cooling the preform to a temperature below about 70 degrees Centigrade;
- reheating the preform to a temperature above about 90 degrees Centigrade;
- and
- blow molding the preform, to prepare a container comprising the micro cellular foamed polymer having the non-reactive gas contained within the micro cellular foam cells;
- wherein the container has a silvery appearance.
A process for preparing a micro cellular preform comprising the steps of:
- injection molding a micro cellular polymer preform having a non-reactive gas entrapped within the walls thereof;
- cooling the preform to a temperature below the polymer softening temperature;
- and
- reheating the preform to a temperature above the glass transition temperature of the polymer and below the temperature at which the increasing pressure of the micro cellular gas bubbles exceeds that of the ability of the material properties to resist and the micro cellular bubbles expand to result in a distorted preform.
A plastic container having a foamed structure wherein the insulating characteristics of the container are proportional to the foam in the preform from which the container is produced.
Dependencies are inferred from the claim text.