EP 0413736 B1 19930915 - METHOD OF MAKING MECHANICAL AND CHEMI-MECHANICAL PAPERMAKING PULP
Title (en)
METHOD OF MAKING MECHANICAL AND CHEMI-MECHANICAL PAPERMAKING PULP
Publication
Application
Priority
SE 8801731 A 19880506
Abstract (en)
[origin: WO8910998A1] The invention relates to a method of manufacturing mechanical and chemi-mechanical papermaking pulp with low energy input by disintegrating and beating wood material in at least two steps. According to the invention, the material is coarse-disintegrated in a first step at a concentration exceeding 20 %, acid groups in the wood material are neutralized, the material is diluted to a concentration of 1-10 % and beaten in one or several steps.
IPC 1-7
IPC 8 full level
D21B 1/12 (2006.01); D21B 1/14 (2006.01); D21B 1/16 (2006.01); D21D 1/20 (2006.01)
CPC (source: EP)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 8910998 A1 19891116; CA 1320067 C 19930713; DE 68909231 D1 19931021; DE 68909231 T2 19940428; EP 0413736 A1 19910227; EP 0413736 B1 19930915; FI 905482 A0 19901105; FI 91787 B 19940429; FI 91787 C 19940810; JP H03504256 A 19910919; SE 461103 B 19900108; SE 8801731 D0 19880506; SE 8801731 L 19891107
DOCDB simple family (application)
SE 8900172 W 19890405; CA 598482 A 19890502; DE 68909231 T 19890405; EP 89905472 A 19890405; FI 905482 A 19901105; JP 50517689 A 19890405; SE 8801731 A 19880506