POLYSTYRENE FOAM SHEET FOR FORMING DEEP DRAWN ARTICLES, AND THE DEEP DRAWN ARTICLES MADE THEREFROM

摘要

A polystyrene foam Sheet (A) for thermoforming deep drawn articles. The polystyrene foam sheet contains 0.5 to 15 wt.% of a rubber component, from 0.5 to 2.0 wt.% of a nucleating agent, has a uniform thickness of from 0.060 to 0.250 inches with a tolerance of ~ 0.10 inches, a density in the range of 4 to 18 lb/ft3, and an average cell size of 0.12 to 0.34 mm. Optionally, one or more films (22) may be extrusion coated or laminated to the foam sheet prior to thermoforming. The resulting deep drawn articles have draw ratios greater than 1.0, have good heat insulation capacity with an attractive appearance.