The Effect of Soy-Flour Mesh Size and its Adhesive Acidity Changes on Shear Strength of Plywood

Document Type : Research Paper

Authors

1 PhD Student, Department of Wood and Paper Science and Technology, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Iran

2 Associate Professor., Department of Wood and Paper Science and Technology, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Iran

3 Professor, Department of Chemistry, Payam Nour University, Iran

4 Assistant Professor., Department of Wood and Paper Science and Technology, Zbol University, Iran

Abstract

In this study the effect of soy flour mesh size and the change of adhesive’s acidity made from its on shear strength of plywood was evaluated. For this aim, soy flour particles classified in three levels mesh size (60, 100 and 140 mesh) by ASTM Sieves. Also, the acidity of soy adhesives changed by sodium hydroxide and sulfuric acid. Results showed that the mesh size of soy flour effected on shear strength of plywood made from soy flour adhesives. The shear strength of plywood made from soy flour with 140 mesh was higher than other specimens. Also, the increase of soy flour adhesive’s acidity by sodium hydroxide resulted in increase of shear strength of plywood. The shear strength of plywood made from soy adhesives compare to plywood made from urea formaldehyde resin was low but it was acceptable according to EN-314 standard.

Keywords

References

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Iranian Journal of Wood and Paper Industries
Volume 7, Issue 3 - Serial Number 3
December 2016
Pages 377-386

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