Manufacture of marbled detergent bars

Details Manufacture of marbled detergent bars Manufacture of marbled detergent bars

1978-08-22

1980-09-16

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Random variegated coloring during molding

By extrusion

264148, 264171, 264245, 264294, 264325, 4251311, B29F 312

Patent

active

042229790

ABSTRACT:
A liquid component can be introduced into a detergent bar by injecting liquid within or immediately downstream of a multi-apertured plate positioned before the compression cone of an extruder. The method can be used to produce marbled bars with the aid of a colored liquid and is described in U.K. Pat. No. 1,387,567.
When a double extruder is used together with a common compression cone the injected liquid becomes unevenly distributed within the detergent. Even distribution of the liquid as striations is achieved by use of a partition in the cone to ensure each detergent stream is subjected to separate compression during movement down the cone. The partition extends to the final extrusion plate; the velocities of the two streams are equalized by having a common extrusion volume between after the two screw extruders.

REFERENCES:
patent: 3779676 (1973-12-01), Bernard
patent: 3884605 (1975-05-01), Grelon
patent: 3890419 (1975-06-01), Kaniecki
patent: 3923438 (1975-12-01), Perla
patent: 3947200 (1976-03-01), Fischer

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