Process for producing a foamed product or foam made of unmodifie

Details Process for producing a foamed product or foam made of unmodifie Process for producing a foamed product or foam made of unmodifie

1994-03-22

1995-12-19

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264148, 26421111, 26421113, 264234, 425209, B29C 4420, B29C 4456

Patent

active

054766214

ABSTRACT:
A process and device for producing a foamed product or foam made of unmodified starch is provided in which the starch is introduced through a feed opening into a treatment chamber containing a conveying device. The conveying device conveys the starch from the feed opening in an axial direction through the treatment chamber. The conveying device has an increasing effective cross section so that by increasing the volume, or by expansion foaming and/or break down of the starch is achieved. An outlet is provided at the other end of the treatment chamber for extruding the product.

REFERENCES:
patent: 3827841 (1974-08-01), Kawai et al.
patent: 3956438 (1976-05-01), Schippers
patent: 3961000 (1976-06-01), Ropiequet
patent: 4107260 (1978-08-01), Dougherty
patent: 4869911 (1989-09-01), Keller

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