Process for the production of an impregnated wood piece, impregnated wood piece obtainable by such a process and pencil having a sheath made of such an impregnated wood piece

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United States of America

PATENT NO 12054001
SERIAL NO

17814144

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Abstract

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A process for the production of impregnated wood pieces for use in pencil production, and pencils with shafts including such impregnated wood pieces, wherein the process comprises two process stages, namely

    a) a first process stage, comprising a first impregnation step, in which an untreated wood piece is at least partially, impregnated with a first aqueous impregnating solution of an impregnating agent selected from the group consisting of 1,3-dimethylol-4,5-dihydroxyethylene urea or a derivative or modification thereof, and a catalyst, anda subsequent curing step, in which the impregnated wood piece is cured in a hot steam atmosphere at an elevated temperature above 100° C., and b) a second process stage comprising a second impregnation step, whereby the impregnated, cured wood piece is at least partially impregnated with a second aqueous impregnating solution of a wax emulsion paraffin based as an impregnating agent.

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Patent Owner(s)

Patent OwnerAddress
FABER-CASTELL AG90546 STEIN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Amadio, Tatiane de Mattos São Carlos, BR 1 0
Barroso, Vladimir A Bazan São Carlos, BR 1 0
Lugert, Gerhard Nuremberg, DE 36 152
Schardosin, Felipe Zatt São Carlos, BR 1 0

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