METHOD OF MANUFACTURING PRODUCTS FROM PAPIER-MACHE Russian patent published in 2018 - IPC D21F3/10 

FIELD: human vital needs satisfaction.

SUBSTANCE: paper material is wound on the blank corresponding to the shape of the product, layer by layer coated with the adhesive, pressed, dried, the preform is impregnated with a vegetable oil, dried, cut into pieces corresponding to the dimensions of the product, and the product surface is handled. New features are layer-by-layer gluing the paper material, carried out with flour paste made from wheat flour with a mass fraction of wet gluten of not less than 28% and water in the ratio of 1:3.5. Sides of the wound paper material glued on the blank of a rectangular cross section is subjected to compression under a pressure of 490*10⁴ PA for 10-15 min, and before drying the preform with a moisture content of 65-70% is removed from the blanks, impregnated at a temperature of 75-80°C for 90-130 min with linseed oil with the addition of up to 3% by volume isopropyl alcohol with the further drying of the preform by heating to constant weight, in the mode - 6 days not less than 60°C with a subsequent increase in temperature by 10°C, bringing the temperature up to 110°C.

EFFECT: shortening the duration of the technological process by accelerating the impregnation of the preform while maintaining the shape while increasing the strength of papier-mache products.

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