PROCESS FOR THE ECONOMIC PRODUCTION OF PAPER COMPRISING WASTE MATERIALS WITH A SPECIAL MIXTURE OS MINERALS

摘要

The proposed method improved economy of mfr., without reducing the strength of the paper. The proposed mixt. contains mineral material with large sorption capacity, such as cation-contg. polyelectrolyte, aluminium-ion-contg. salts and cation-contg. starch (soluble in cold water), which act synergistically. - The majority of components will be built into the structure of the paper. The proposed mixt. may be applied as an aq. suspension, so conventional technology can be used. The mixt. is added to the suspension of fibrous material directly before the sheets of paper are formed