Polymeric replacement for a glass drinking container
A polymeric replacement vessel, or container, for glassware and glass containers and a method of making the same. polymeric drinking container simulates a glass drinking container having a glass drinking container volume. The polymeric drinking container comprises a base and an enclosed wall composed of the polymer. The wall is formed with the base and extends from the base while defining an opening opposite the base. The enclosed wall includes an inside surface and an outside surface. The base and enclosed wall form a polymeric drinking container volume made of the polymeric material. This polymeric drinking container volume is equal to the glass component drinking container volume plus an amount equal to the glass component drinking container volume multiplied times the ratio of the specific gravity of the glass to the specific gravity of the polymer.
1. A method of manufacturing a polymeric drinking container, comprising
providing a core layer constructed of a first polymeric material;
inserting the first core into a cavity;
applying at least one over molded layer constructed of a second polymeric material to the core layer;
cooling the at least one over molded layer and the core layer;
inserting the cooled layers into an incrementally larger cavity; and
applying at least one additional over molded layer constructed of a third polymeric material to the applied at least one over molded layer;
providing a mold for molding a molten thermoplastic polymer into a drinking container, the mold having at least two separable mold portions adjoined along a seam, the adjoined mold portions forming mold walls and a mold core that define a mold cavity;
providing a plurality of first cooling lines adjacent to the mold walls and the seam and a plurality of second cooling lines adjacent to the mold walls but separated from the seam by at least one of the plurality of first cooling lines;
cooling the plurality of first cooling lines to a first temperature and cooling the plurality of second cooling lines to a second temperature, wherein the first temperature is lower than the second temperature;
injecting molten thermoplastic polymer into the cavity; and
cooling the molten thermoplastic polymer to form the core layer of polymeric material.
2. The method of claim 1 , wherein at least one of the first polymeric material, the second polymeric material, and the third polymeric material is a clear engineering thermoplastic.
3. The method of claim 2 , wherein at least one of the first polymeric material, the second polymeric material, and the third polymeric material is chosen from polyethylene terephthalate, polyethylene terephthalate glycol, styrene acrylonitrile, polycarbonate, polymethylpentene, and polyvinylchloride.
4. The method of claim 3 , wherein at least one of the first polymeric material, the second polymeric material, and the third polymeric material is chosen from polypropylene, polyethylene, polyethylene terephthalate, and polyvinylchloride and further includes at least one additive chosen from calcium carbonate, talc, aluminum silicate.
5. A method of manufacturing a polymeric drinking container, the method comprising:
providing a mold for molding a molten thermoplastic polymer into a drinking container, the mold having at least two separable mold portions adjoined along a seam, the adjoined mold portions forming mold walls and a mold core that define a mold cavity;
providing a plurality of first cooling lines adjacent to the mold walls and the seam and a plurality of second cooling lines adjacent to the mold walls but separated from the seam by at least one of the plurality of first cooling lines;
cooling the plurality of first cooling lines to a first temperature and cooling the plurality of second cooling lines to a second temperature, wherein the first temperature is lower than the second temperature;
injecting molten thermoplastic polymer into the cavity.
6. The method of claim 5 , wherein the thermoplastic polymer is a clear engineering thermoplastic when solid.
7. The method of claim 6 , wherein the thermoplastic polymer is chosen from polyethylene terephthalate, polyethylene terephthalate glycol, styrene acrylonitrile, polycarbonate, polymethylpentene, and polyvinylchloride.
8. The method of claim 6 , wherein the thermoplastic polymer is chosen from polypropylene, polyethylene, polyethylene terephthalate, and polyvinylchloride and further includes at least one additive chosen from calcium carbonate, talc, aluminum silicate.