Method and device for the continuous manufacture of slabstock po

Details Method and device for the continuous manufacture of slabstock po Method and device for the continuous manufacture of slabstock po

1996-09-18

1998-09-08

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 458, 264101, 425 4C, 425 73, 425143, B29C 4428

Patent

active

058041133

ABSTRACT:
A method and device for continuously producing slabstock polyurethane foam wherein a polymerizable reaction mixture containing a blowing agent is applied onto a moving conveyor and allowed a free rise expansion and polymerization within a substantially closed space. The pressure in this space is maintained within a predetermined pressure range by continuously supplying gas to the space, in addition to the blowing gas produced by the reaction and by simultaneously exhausting gas from said space. In this way, pressure fluctuations are reduced in the space and further parameters such as the temperature can be controlled so as to enable production of a foam with constant properties.

REFERENCES:
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patent: 4278624 (1981-07-01), Kornylak
patent: 4486369 (1984-12-01), Schafler et al.
patent: 4487731 (1984-12-01), Kobayashi
patent: 4530807 (1985-07-01), Vreenegoor
patent: 4601864 (1986-07-01), Vreenegoor
patent: 4777186 (1988-10-01), Stang et al.
patent: 5375988 (1994-12-01), Klahre

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