An injection-blow molding method for manufacturing a colored pol

Details An injection-blow molding method for manufacturing a colored pol An injection-blow molding method for manufacturing a colored pol

1988-09-28

1991-01-29

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including application of internal fluid pressure to hollow...

26432817, 26432818, B29C 4906

Patent

active

049884778

ABSTRACT:
A colored container of polyester obtained by injection molding of a preform starting from colorless polyester granulate to which a particulate dyestuff composition is fed. The particulate dyestuff composition used is a particulate intimate mixture of a dyestuff and/or a pigment and a solid wax-like carrier having a melting point above 45.degree. C. The preform obtained is converted to the final shape by blow molding.

REFERENCES:
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patent: 3972665 (1976-08-01), Andrews, III
patent: 3978036 (1976-08-01), Pollard
patent: 4271211 (1981-06-01), Knepper
patent: 4495128 (1985-01-01), Stoffelsma
"Predrying Molding Powers", by W. E. Rahm, M. L. Macht and G. M. Kuettel.

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