Title:
METHOD FOR CONTINUOUSLY FORMING SHEET CONTAINING LATEX OR SIMILAR SUBSTANCE AND/OR PHENOPLAST OR AMINOPLAST FROM FIBROUS MATERIAL IN AQUEOUS MEDIUM, FORMED SHEET AND REGENERATIVE UTILIZATION THEREOF
Document Type and Number:
Japanese Patent JPS57199896
Kind Code:
A
Abstract:
A new process for manufacturing sheets made of fibrous material containing latex is characterized in that the pulp containing the fibrous material is prepared in the following way:-adjustment of the pH between 4 and 5.5 and preferably between 4 and 4.5,-addition of an electrolyte, the polarity of which is of the opposite sign to that of the latex used,-addition of a foam inhibitor,-re-adjustment of the pH between 4 and 5.5, if necessary,-addition, preferably by injection, of latex,-second addition of an electrolyte having the same characteristics as indicated above,-possibly addition of resins (phenoplasts or aminoplasts),-re-adjustment of the pH to the previously indicated value, if necessary. The new sheets obtained by this process find use in the field of paper manufacture.
Inventors:
RUNE BARUTOUROONI
Application Number:
JP6704282A
Publication Date:
December 07, 1982
Filing Date:
April 21, 1982
Export Citation:
Assignee:
PAPETOURII DOU JIYANDOUURU SA
International Classes:
D21C5/02; D21H17/03; D21H17/33; D21H17/35; D21H17/37; D21H17/46; D21H17/48; D21H17/50; D21H17/51; D21H23/00; D21H23/10; (IPC1-7): D21C5/02; D21H3/02; D21H3/48
Domestic Patent References:
| JPS5540895A | 1980-03-22 | |||
| JPS556587A | 1980-01-18 | |||
| JP45022966A | ||||
| JPS4923243A | 1974-03-01 |