FIRST STUFF FROM NON-WOODEN RAW MATERIALS FOR PAPER PRODUCTION

Abstract

The main objectives of scientific work is to study the technological parameters of the sodium hydroxide method  of  delignification  of  non-wood  raw  materials  and  production  of  fibrous  first  stuff   for  the  manufacturing  of packaging types of paper. Methodology. For the research, rapeseed stalks, sodium hydroxide cooking, anthraquinone catalyst were used. The  brews  were  cooked  in  steel  autoclaves,  which  were  lowered  into  a  glycerin  bath.  Standard  methods  for  the
determination of the quality indicators (yield and residual lignin content) of non-wood fiber first stuff  were used. As a mathematical  data  processing  method,  the  generalized  reduced  gradient  method  was  used.  Laboratory  samples  of castings of fibrous first stuff  and paper were made on a LA-2 sheet-making apparatus, the mechanical parameters of the outturn sheet were determined according to the standard methods using appropriate instruments. Results. The expediency of using rapeseed stalks for processing of fibrous first stuff  under alkaline conditions
has been proven. It was found that the greatest influence on the delignification of raw materials has the raise of cooking temperature from 80 to 120 ° C and the use of the anthraquinone catalyst. It has been shown that the obtained rapeseed first stuff  have sufficient paper-forming properties and are suitable for use in the production of MS 5B brand paper for the use in the production of fluting paper or board of B-3 grade.
The scientific novelty of the work is due to the environmental friendliness of the agrowaste processing as an alternative raw material for the production of fibrous first stuff  at low cooking temperatures. Using rapeseed stalks as an example, the influence of technological parameters on the quality indicators of first stuff  was studied. Using the
mathematical methods of the processing of experiment data, the optimal ratio of fibrous first stuff /waste paper at which the strength indicators of fluting paper or board will meet the standards was determined.
Practical significance. Research results has shown the expediency of using oilseed wastes for processing of fibrous first stuff , with the aim of expanding the raw material base of cardboard and paper production.