Jivkov Vassil, Simeonova Ralitsa, Antov Petar, Marinova Assia, Petrova Boryana, Kristak Lubos
Department of Interior and Furniture Design, Faculty of Forest Industry, University of Forestry, 1797 Sofia, Bulgaria.
Department of Interior and Architectural Design, Faculty of Architecture, University of Architecture, Civil Engineering and Geodesy, 1046 Sofia, Bulgaria.
Materials (Basel). 2021 Sep 4;14(17):5064. doi: 10.3390/ma14175064.
In recent years, the furniture design trends include ensuring ergonomic standards, development of new environmentally friendly materials, optimised use of natural resources, and sustainably increased conversion of waste into value-added products. The circular economy principles require the reuse, recycling or upcycling of materials. The potential of reusing waste corrugated cardboard to produce new lightweight boards suitable for furniture and interior applications was investigated in this work. Two types of multi-layered panels were manufactured in the laboratory from corrugated cardboard and beech veneer, bonded with urea-formaldehyde (UF) resin. Seven types of end corner joints of the created lightweight furniture panels and three conventional honeycomb panels were tested. Bending moments and stiffness coefficients in the compression test were evaluated. The bending strength values of the joints made of waste cardboard and beech veneer exhibited the required strength for application in furniture constructions or as interior elements. The joints made of multi-layer panels with a thickness of 51 mm, joined by dowels, demonstrated the highest bending strength and stiffness values (33.22 N∙m). The joints made of 21 mm thick multi-layer panels and connected with Confirmat had satisfactory bending strength values (10.53 N∙m) and Minifix had the lowest strength values (6.15 N∙m). The highest stiffness values (327 N∙m/rad) were determined for the 50 mm thick cardboard honeycomb panels connected by plastic corner connector and special screw Varianta, and the lowest values for the joints made of 21 mm thick multi-layer panels connected by Confirmat (40 N∙m/rad) and Minifix (43 N∙m/rad), respectively. The application of waste corrugated cardboard as a structural material for furniture and interiors can be improved by further investigations.
近年来，家具设计趋势包括确保符合人体工程学标准、开发新型环保材料、优化自然资源利用以及可持续地将废物更多地转化为增值产品。循环经济原则要求材料的再利用、回收或升级改造。本研究探讨了利用废弃瓦楞纸板生产适用于家具和室内应用的新型轻质板材的潜力。在实验室中，用瓦楞纸板和山毛榉单板制造了两种类型的多层板，并使用脲醛（UF）树脂进行粘结。对所制作的轻质家具板的七种端角接头类型以及三种传统蜂窝板进行了测试。评估了压缩试验中的弯矩和刚度系数。由废纸板和山毛榉单板制成的接头的抗弯强度值显示出在家具结构或作为室内元素应用时所需的强度。由厚度为51毫米的多层板制成、用暗榫连接的接头表现出最高的抗弯强度和刚度值（33.22牛·米）。由21毫米厚的多层板制成、用康菲玛特连接件连接的接头具有令人满意的抗弯强度值（10.53牛·米），而米尼菲克斯连接件的强度值最低（6.15牛·米）。对于用塑料角连接件和特殊螺丝Varianta连接的50毫米厚纸板蜂窝板，测定出最高的刚度值（327牛·米/弧度），而对于用康菲玛特连接件（40牛·米/弧度）和米尼菲克斯连接件（43牛·米/弧度）连接的21毫米厚多层板制成的接头，刚度值最低。通过进一步研究，可以改进将废弃瓦楞纸板用作家具和室内结构材料的应用。
