Investigation on the Scratch Strength of Clear Paints Used in Furniture Industries on the Wood Species Beech, Elm, Alder and Spruce

• Main Authors: Mohammad Ghofrani, Gholamhossein Manavi, Ahmad Mirshokrai
• Format: Article
• Language: fas
• Published: Iranian Scientific Association of Wood and Paper Industries 2014-05-01
• Series: Iranian Journal of Wood and Paper Industries
• Subjects: : Scratch strength; Clear paints; Wood species; Nitrocellulose lacquers; Acid catalyst lacquers
• Online Access: http://www.ijwp.ir/article_11260_96bcb34c9c76bccf0dccd15de700f4b3.pdf

In This research, the scratch strength (Cross-Cut Test) of clear paints (nitrocellulose lacquers and acid catalyst lacquers) of wood species Beech, Elm, Alder and spruce were studied as a function of moisture content (MC) of the samples. For this purpose, lumbers (550×110×12 mm) were cut from sapwood in tangential surfaces and were air dried for one month according to wood drying procedures. Then, for pre-conditioning of moisture content, at the levels of 8%, 12% and 15%, the samples were placed in three clima rooms. Then, finish applied and strength tests were performed. The results revealed that for acid catalyst lacquers the highest scratch strength (10.4%) belongs to Elm wood with 8% moisture content, and the lowest scratch strength (53.6%) belongs to Spruce wood with nitrocellulose lacquers having 15% moisture content.