Plastic article or earthenware shaping or treating: apparatus – With mechanical means forming or expanding pores
Patent
1997-10-20
1999-07-27
Kuhns, Allan R.
Plastic article or earthenware shaping or treating: apparatus
With mechanical means forming or expanding pores
425817C, C08J 922
Patent
active
059286741
ABSTRACT:
The subject invention pertains to an apparatus with the continuous expansion of thermoplastic minipellets, particularly polypropylene. The apparatus comprises a mixing means for mixing the thermoplastic minipellets in water to form a slurry, which is connected to a pressurizing means to form a flow of pressurized slurry to a junction which in trains a blowing agent to form a pressurized slurry mixture, which is connected to a heating means to heat the pressurized slurry mixture. Once the pressurized slurry mixture is impregnated with the blowing agent, it flows through water more orifice plates for expansion of thermoplastic minipellets into an expansion vessel.
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Hall, III Thomas N.
Trivedi Yogesh C.
Drake James J.
Kuhns Allan R.
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