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2 015 878

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C1

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IPC

(21) (22)

Application

93005428/15, 1993-02-01

(22)

Actual filing date

1993-02-01

(45)

Published

1994-07-15

(72)

Inventor

Kirillov A.N.Birjukov V.G.Birjukov A.G.Sobolev A.V.

(73)

Holder

Moskovskij Lesotekhnicheskij Institut

METHOD FOR PRODUCTION OF FIRE-PROOF PLYWOOD Russian patent published in 1994 - IPC

Abstract RU 2015878 C1

FIELD: wood-working industry. SUBSTANCE: raw birch veneer with moisture content of 70-130% is dried off up to moisture content of 30-60%. Impregnation of dried off veneer is carried out in solution of fire-proofing compound, e.g., of diammonium phosphate. In so doing, impregnation results in somewhat reduction of impregnating solution. After impregnation of veneer, the solution of fire-proofing compound is raised to working concentration by addition of more concentrated solution or dry salt. Veneer impregnated with fire-proofing compound is dried to moisture content of 8 ∓ 2%. Then, binding agent is applied to veneer odd sheets, and pack is assembled and hot-pressed. EFFECT: higher efficiency.

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RU 2 015 878 C1

Authors

Kirillov A.N.

Birjukov V.G.

Birjukov A.G.

Sobolev A.V.

Dates

1994-07-15—Published

1993-02-01—Filed

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