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FORFARANDE FOR BEHANDLING AV MEKANISKA MASSOR OCH/ELLER DERAV FRAMSTELLDA PRODUKTER
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Title:
FORFARANDE FOR BEHANDLING AV MEKANISKA MASSOR OCH/ELLER DERAV FRAMSTELLDA PRODUKTER
Subjects:
CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES
;
DISINFECTION, STERILISATION, OR DEODORISATION OF AIR
;
FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
;
HUMAN NECESSITIES
;
HYGIENE
;
IMPREGNATING OR COATING OF PAPER
;
MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES
;
MEDICAL OR VETERINARY SCIENCE
;
METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL
;
PAPER NOT OTHERWISE PROVIDED FOR
;
PAPER-MAKING
;
PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D
;
PRODUCTION OF CELLULOSE
;
PULP COMPOSITIONS
;
TEXTILES
;
TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G
Description:
1515865 Treating mechanical pulp PAPIRINDUSTRIENS FORSKNING-SINSTITUTT 12 Sept 1975 [12 Sept 1974] 37605/75 Heading D2W Mechanical wood pulp is impregnated with a buffer agent (other than a borate) which buffers in the pH range 6-10, the buffer agent being present in an amount of at least 0.2% by wt., based on the dry wt. of the pulp. The buffer, which may be added in the form of an aqueous solution, may be introduced into a refiner or grinder, the white water system of a paper machine, or by injection into the pulp. The buffer may be an alkali metal salt or ammonium salt of phosphoric acid, carbonic acid, citric acid or tartaric acid. The examples describe the use of sodium phosphate, ammonium carbonate, sodium citrate, and sodium borate (for comparison only) buffer solutions. The mechanical pulp may be a refiner pulp, ground wood pulp or, a thermomechanical pulp, which may have been treated with ozone. The treated pulps are stated to be easily wet defiberised, and show a high water absorption rate.
Creation Date:
1976
Language:
Swedish
Source:
esp@cenet
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