Paper Information

Journal:   IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH   summer 2016 , Volume 31 , Number 2 (55) #f00641; Page(s) 248 To 260.
 
Paper: 

Investigation on the effect of different methods of applying transparent coatings on adhesion strength of coating in wooden surfaces

 
 
Author(s):  GHOFRANI M., Mohammad Moradi z., KHOJASTEH KHOSRO S.*
 
* DEPARTMENT OF WOOD GROUP, FACULTY OF CIVIL ENGINEERING, SHAHID RAJAEE TEACHER TRAINING UNIVERSITY, TEHRAN, IRAN
 
Abstract: 
In present study the effect of different methods of applying transparent coatings on adhesion strength of coating on Walnut (Juglans regia), Maple (Acer velutinum) and Pine (Pinus eldarica) wood was investigated. For this purpose, samples were prepared with dimension of 200×100×20 mm and 8% moisture content. Samples’ surfaces were sanded with 100, 120 and 180 grate sizes sandpaper significantly. Then after preparation of wooden samples with sealer, their surfaces were covered with clear and acid catalyzed transparent finish in separate processes using spray gun and applicator. Adhesion strength of coating was measured with Pull-Off method based on ASTM D4541 standard. Fluorescence microscopy test was used for the investigation of coating penetration in spray gun and applicator method. Results showed that the method of applying coating on wooden surfaces has significantly affected adhesion strength, and highest adhesion strength between all samples was observed in samples coated with applicator method. Investigation of coating penetration indicated that applicator method had good penetration in wood substrate in comparison to spray gun method. Highest differences in adhesion strength of coating between spray gun and applicator method were observed in Walnut and Maple samples. In general, highest adhesion strength of coating was found in Walnut samples covered with acid catalyzed transparent finish by using applicator method.
 
Keyword(s): Transparent coatings,adhesion strength of coating,penetration of coating,coating applying method,applicator,spray gun
 
References: 
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