SU142014A1 - A method of making colored wood plastic from sawdust without a binder - Google Patents

Description

Methods for making colored plastic from sawdust without a binder Known.

In order to obtain a dark brown water resistant surface, a method is proposed for the production of magnet wood plastic from a mixture of softwood and hardwood sawdust. The essence of the proposal is that sawdust with a particle size of 0.25-1 mm, containing 18-20% moisture, is treated with 5% aqueous solution and hydroxylamine sulphate solution. Then the mass is kept for 20-24 hours to complete the hydrolysis process. After that, the resulting mass is dried at a temperature of 60 ° to a residual moisture content of 5-6% and subjected to hot compression at a temperature of 150 ° under a pressure of 250 kg / cm. The time required for pressing depends on the thickness of the wood plastic, being equal to one minute for every millimeter of thickness.

The fabricated material has a smooth, hard, water-resistant surface of a dark brown color. Such wood plastic and has the following specifications: Volume weight is 1350 kg / m.

Strength on compression - 500-800 kg / cm. Heat conductivity coefficient - 0,258-0,267 kcal / m. hail. hour.

Wood plastic can be used as a substitute for parquet and facing ceramics.

Subject invention

A method of manufacturing colored wood plastic from sawdust without a binder, characterized in that, in order to obtain a dark brown waterproof surface, sawdust with a size of yo 142014-2 -:

particles from 0.25-1 mm, containing moisture, are treated with a 5% aqueous solution of hydroxylamine sulphate, after which the mass is kept for 20-24 hours to prevent hydrolysis, then dried at 60 ° to a residual moisture content of 5-6% and The plastic molding process is subjected to hot pressing at a temperature in the order of 150 °, under a pressure of 250 kg / cm for one minute for every millimeter of the thickness of the wood plastic.