Verfahren zur Herstellung eines Imprägnierten Holzstücks, mit einem Solchen Verfahren Erhältliches Imprägniertes Holzstück und Bleistift mit einer Hülle aus einem Solchen Imprägnierten Holzstück

Details

Veröffentlichungs-Nr.

EP4122661

Aktenzeichen

EP21187319

Anmeldetag

22. Juli 2021

Veröffentlichung

15. Oktober 2025

Erteilung

15. Oktober 2025

Rechtsraum

EP

IPC

B27K3/02B27K3/15B27K5/00B43K19/00C08L91/00

Abstract

The present invention relates to a process for the production of impregnated wood pieces, in particular for use in pencil production, wherein the process comprises two process stages, namelya) 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, and- a subsequent curing step, in which the impregnated wood piece is cured in a hot steam atmosphere at an elevated temperature above 100°C, andb) 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.The invention further relates to an impregnated wood piece obtainable by such a process and a pencil having a lead and a shaft, wherein the shaft is made from or comprises such an impregnated wood piece obtainable by such a process.

Anmelder

Firma

Faber- Castell AG

Land

🇩🇪 Deutschland

Fachgebiete