초록 ▼

A rigid thermoformable packaging material is provided which includes an outer layer of a nonfoamed oriented polystyrene and an inner layer of a functional polymer resin. The laminated packaging material can be produced by either thermal lamination or coextrusion. The packaging material is readily th

A rigid thermoformable packaging material is provided which includes an outer layer of a nonfoamed oriented polystyrene and an inner layer of a functional polymer resin. The laminated packaging material can be produced by either thermal lamination or coextrusion. The packaging material is readily thermoformed into containers for medical or dental products or foods and is heat sealable, tough, resistant to chemicals, and resistant to cracking and tearing during handling by thermoforming equipment.

대표청구항 ▼

A rigid, thermoformable packaging material for medical, dental, and food packages comprising of an outer layer consisting essentially of a nonfoamed biaxially oriented polystyrene having a thickness of between about 1 to about 30 mils, and an inner layer laminated to said outer layer of a polymer re

A rigid, thermoformable packaging material for medical, dental, and food packages comprising of an outer layer consisting essentially of a nonfoamed biaxially oriented polystyrene having a thickness of between about 1 to about 30 mils, and an inner layer laminated to said outer layer of a polymer resin selected from the group consisting of low density polyethylene, high density polyethylene, polypropylene and nylon, said inner layer having a thickness of between about 0.5 to about 10 mils, and wherein said oriented polystyrene comprises from about 78% to about 96.5% by weight of said packaging material.