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Materials, Methods & Technologies, Volume 8, 2014

Laura Laiveniece, Andris Morozovs
Pages: 84-89
Published: 2 Jun 2014
Views: 2,338
Downloads: 929
Abstract: Wood is one of the key raw materials that are used in constructions. The research of the adhesive joint properties is important to characterize the overall design of the wood construction. To achieve good joint performance and durability it is important to adhesive penetrate into wood substrate deep enough. Adhesive penetration is influenced by many factors such as wood, adhesive and process factors. The objective of the present paper is comparison of the polyurethane (PU) glues penetration depth into Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies) wood depending on applied pressure. Penetration depth of cured adhesive was determined using fluorescence microscopy. Obtained results of the bond-line width had the good correlation with applied pressure value.
Keywords: softwood, polyurethane glue, applied pressure, penetration, fluorescence microscopy
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