INVESTIGATION OF THE STRENGTH PROPERTIES OF COMPOSITE MATERIALS BASED ON PAPER HONEYCOMB
INVESTIGATION OF THE STRENGTH PROPERTIES OF COMPOSITE MATERIALS BASED ON PAPER HONEYCOMB

Summary/Abstract: Composite materials based on paper honeycomb structure do have a potential in today’s fast changing markets and within the present context as sustainable products the demand for more economical and environmentally friendly products is highly increasing and stands out for environmental issues but must outstand the strength properties as the alternative products used in packaging industry. Strength properties of composite materials made of paper honeycomb were investigated experimentally. Static compression tests were made using testing machines “Zwick/Roell”. Composite materials were made with different honeycomb properties: cell high, cell size, various grammage of laminate layer. Honeycombs were dried and soaked before testing their strength properties. It was confirmed and determined that moisture is important factor for paper honeycombs. It was determined that strength properties are quite different for dried honeycombs and depend signific on the drying time which was adjusted for the specimens. Dried honeycombs hade higher resistance to compression up to 70% and depended on the increased drying time and other honeycomb structure aspects as the cell height and the laminated layer in the composite structure. Strength of all investigated composite materials was higher using honeycombs with smaller size cells (with same cell high). Sandwich panels with bigger laminated layer grammage had higher strength characteristics especially panels with smaller cell high honeycombs.

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