Processing Factors and Properties of Thermal Insulation Boards Made of Plant Fillers = Технологические факторы и свойства теплоизоляционных плит из растительных наполнителейProcessing Factors and Properties of Thermal Insulation Boards Made of Plant Fillers = Технологические факторы и свойства теплоизоляционных плит из растительных наполнителей Wood processing soft waste is mainly used in the production of fuel briquettes,
irrecoverable (non-recyclable) waste from spinning flax and cotton are incinerated or sent to
dump. The development of methods for recycling non-recyclable cellulosic waste through
the product manufacturing is relevant, both from the resource conservation perspective, as
well as the environmental point of view. The issues of plant waste recycling through the
manufacturing of various types of products are widely developed in the Russian and foreign
scientific research practice. Researchers deal with the processing of wheat, rice straw, bamboo
stalks, and other cellulosic materials. There is a plenty of published information on methods of
soft wood waste recycling. However, no research on recycling irrecoverable waste of spinning
flax and cotton fibers had been carried out before this paper. We propose to produce thermal
insulation boards based on phenol-formaldehyde resol binder using flax and cotton spinning
waste and soft wood processing waste. The wet production method used here involves mixing
the filler with water, a precipitant solution and a binder. After spinning the material is dried.
The paper presents the results of determining the physical and mechanical properties and
thermal conductivity coefficient of boards made of plant waste. The research was carried out
according to the B-plan of the second order. Adequate regression mathematical models of the
dependences of physical and mechanical parameters of the boards on the varying factors of
the production process were developed according to the experimental data processing results.
Using the developed regression models we built the response surfaces of the composite
parameters: the bending strength of the boards, the thickness swelling of the boards after
24 h of exposure in water and the thermal conductivity coefficient. Nomograms of the
dependencies of board parameters on the values of varying factors have been developed based
on the mathematical models analysis. The nomograms are the basis for the development of
practical recommendations for determining the rational values of the parameters of insulation
board materials production from irrecoverable waste of spinning flax and cotton and soft
wood processing waste.
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