Penetration of urea-formaldehyde adhesives in wood tissue, part I: Radial penetration of UF adhesives into beech
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چکیده
منابع مشابه
Adhesive penetration in Beech wood Part II: Penetration Model
We propose an analytical model to predict the adhesives penetration into hard wood. Penetration of hard wood is dominated by the vessel network which prohibits porous medium approximations. Our model considers two scales: a one dimensional capillary fluid transport of a hardening adhesive through a single, straight vessel with diffusion of solvent through its walls and a mesoscopic scale based ...
متن کاملAdhesive Penetration in Beech Wood Part I: Experiments
A study with synchrotron radiation X-ray tomographic microscopy (SRXTM) of PUR, PVAC, and UF adhesive bond lines in beech wood, bonded under various growth ring angles is presented. After determining the hardening characteristics of the adhesives, we evaluate the bond line morphologies, and the adhesive penetration into the wood structure. We find distinct bond line imperfections for the differ...
متن کاملMicrostructural and Micromechanical Characterization of Modified Urea-Formaldehyde Resin Penetration into Wood
Characterization of the adhesive penetration behavior in wood is highly desired for optimizing the manufacturing processes and product properties. In this study, modified urea-formaldehyde (UF) adhesive was used to prepare glued laminated timber (Cryptomeria fortunei Hooibrenk). The depth of gross penetration was measured by fluorescence microscopy (FM), which showed the UF passed through 1.5 t...
متن کاملMelamine–Glyoxal–Glutaraldehyde Wood Panel Adhesives without Formaldehyde
Abstract: (MGG’) resin adhesives for bonding wood panels were prepared by a single step procedure, namely reacting melamine with glyoxal and simultaneously with a much smaller proportion of glutaraldehyde. No formaldehyde was used. The inherent slow hardening of this resin was overcome by the addition of N-methyl-2-pyrrolidone hydrogen sulphate ionic liquid as the adhesive hardener in the glue ...
متن کاملFluoride penetration from three orthodontic adhesives: an experimental study
OBJECTIVE To examine the prophylactic potential of 3 orthodontic bonding adhesives: Fuji Ortho SC, Illuminate, and Resilience. METHODS Thirty-six Wistar Wag rats were randomly divided into 4 groups consisting of 9 rats each. One of the groups received no treatment and was used as a control. In the other groups, individual bands coated with one of the 3 adhesives were cemented to the lower inc...
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ژورنال
عنوان ژورنال: Glasnik Sumarskog fakulteta
سال: 2008
ISSN: 0353-4537,2217-8600
DOI: 10.2298/gsf0898039g