Method of producing bottles of saturated polyester

Details Method of producing bottles of saturated polyester Method of producing bottles of saturated polyester

1984-05-07

1986-01-14

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Differential temperature conditioning

425526, B29C 1707

Patent

active

045644977

ABSTRACT:
A method of producing a saturated polyester resin bottle having a white-patterned wall by bringing at least one heat absorbing member into partial contact with a transparent tubular parison of a saturated polyester resin, when the tubular parison is heated, so that the portions of the saturated parison other than that contacting with the heat absorbing member may be heated to a relatively high temperature and may be locally crystallized to leave a desired white pattern. The bringing operation of the heat absorbing member is accomplished by inserting the heat absorbing member attached to a stem into the tubular parison thereby to prevent the portion of the tubular parison contacting with the heat absorbing member from turning locally white. The aforementioned relatively high temperature is higher than the glass transition temperature and lower than the crystallization temperature of the saturated polyester resin used. Moreover, the heating treatment is interrupted while the parison portion contacting with the heat absorbing member is left under its uncrystallized transparent condition.

REFERENCES:
patent: 2560855 (1951-07-01), Flanagan
patent: 2985915 (1961-05-01), Winstead
patent: 4179488 (1979-12-01), Nishikawa et al.

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