Title:
IMPROVED PRODUCTION OF POLYURETHANE FOR FOAM BLOCK
Document Type and Number:
Japanese Patent JPS5497666
Kind Code:
A
Abstract:
Method for eliminating the densification of the bottom zone, in the manufacture of blocks of polyurethane foam, characterized in that: a) the belt or endless belt of the foam producing installation is operated, without feeding the foam components, during a suitable period of time, while heating said band in a substantially homogeneous way from the ambient temperature ta up to a certain temperature tm b) the operation of the belt is interrupted for a suitable period of time δ tp, at the same time that the feeding of the foam components is begun, in which interval the temperature decreases from tm to a to value, and c) the feeding of the components of the foam continues, and the running of the foam is resumed. Endless belt, maintaining the temperature of said endless belt in motion at the to value, whereby a continuous block of substantially polyurethane foam is obtained entity lacking a densified fund. (Machine-translation by Google Translate, not legally binding)
Inventors:
ROMAN YARUZA RUASESU
Application Number:
JP3279978A
Publication Date:
August 01, 1979
Filing Date:
March 22, 1978
Export Citation:
Assignee:
TEC FOAM SA
International Classes:
B29B7/00; B29C39/00; B29C39/16; B29C39/38; B29C39/44; B29C44/28; (IPC1-7): B29D27/04
Domestic Patent References:
| JPS50126764A | 1975-10-06 |