Claims
- 1. A foamed thermoplastic polymeric resinous article substantially free of swirl-patterns in its surface comprising:
- a thermoplastic polymeric resinous material selected from the group consisting of polystyrene, polypropylene, and polyethylene having a finely divided inorganic material comprising about 30% zinc sulfide and about 70% barium sulfate intimately associated therewith in a range between about 0.001% and about 50% based upon the total weight of the thermoplastic polymeric resin and the inorganic material.
- 2. The foamed thermoplastic polymeric resinous article substantially free of swirl-patterns in its surface of claim 1 wherein said inorganic material is present in a range of between about 1.0% and about 10% based upon the total weight of said thermoplastic polymeric resin and said inorganic material.
- 3. The article of claim 1 wherein the thermoplastic polymeric resinous material is polystyrene.
- 4. The article of claim 1 wherein the thermoplastic polymeric resinous material is polypropylene.
- 5. The article of claim 1 wherein the thermoplastic polymeric resinous material is polyethylene.
Parent Case Info
This is a division, of application Ser. No. 149,022, filed June 1, 1971, now abandoned.
US Referenced Citations (2)
Divisions (1)
|
Number |
Date |
Country |
Parent |
149022 |
Jun 1971 |
|