The Effect of Face and Adhesive Types on Mechanical Properties of Sandwich Panels Made from Honeycomb Paper

Sandwich panels are new kind of layered composites that usually are composed of three layers and their core layer''s thickness is higher and the outer layers are determinative in determination of the products strength and stiffness. The core layer is commonly made of honeycomb paper، corrugated paper and polyurethane etc. In this study، effects of face and adhesive types on mechanical properties of sandwich panels made from honeycomb paper were investigated. The variables included three types; beech face، poplar face and hardboard (S2S face، veneer less) and adhesive type (two types; epoxy and PVA). Out of experimental panels specimens were cut and tested according to DIN E 326-1 standard. Mechanical properties of panels، included modulus of elasticity as well as modulus of rupture at the edge and surface (based on DIN EN 310 standard) and Impact Bending Strength (IBS) of the panels (based on ASTM D 3499 standard) were measured. The gathered data were analyzed as completely randomized factorial design. Highest mechanical properties were reported for panels glued with epoxy resin and containing fiberboard at the middle. According to results، optimum condition of producing sandwich panels was observed in uses of epoxy resin and fiberboard S2S face، veneer less) at the middle.