StrongCorrugated cardboardRe boardStrong* Registered trademark of Re-board Technology, Swedenand sale of cardboard and packaging materials. When the company intro-duced a cutting plotter for in-house production of reinforced cardboard, it learned about Re-board*, a paper ma-terial born in Sweden, nearly 20 years ago.“It was an introduction from a trad-ing company that dealt in plotters. The advantage of Re-board is that it is overwhelmingly light and easy to process, while having the same com-pressive strength as wood products. Furthermore, it was a 100% paper ma-terial, and more than 85% of the raw material was thinned wood. At the time, understanding of the environment was not as widespread as it is today, but as a manufacturing company, Kawaguchi, president of our company, decided to adopt the product because he thought that we should choose environmentally friendly materials,” explains Yuya Sato, division manager of the Display Busi-ness Department.Re-board is as strong as wood products. The secret lies in its internal structure. The core of ordinary card-board is placed horizontally in relation Enlarged blue circleto the liner, but in Re-boards, the lin-er and core are placed vertically, and multiple layers of these are laminat-ed together, then sliced horizontally and processed into boards (Figure 2). Therefore, it is denser than ordinary cardboard. Cardboard is strong in the corrugated flow direction (arrow direc-tion in Figure 2), and therefore has su-perior strength, especially from the top and bottom directions.“Re-board is often regarded as a reinforced cardboard, but technically it belongs to a category called ‘rig-id paperboard.’ It is a material made of cardboard lined up vertically, and although it is a type of cardboard, its structure is different. We define it as a ‘paper building material’ to convey that it is as strong as wood products. Af-ter use, these products can basically be sent to a recycled paper collection like any other cardboard, and once Cross-section of Re-board▶A chair in the office of Kawaguchi Mac. They are made of Re-board.Figure 2 Structural differences between cardboard and Re-board. Cardboard is stronger in the direction of the arrow.59High-strength Re-board, easy to recycleThe company has used Re-board to create displays for exhibitions, decora-tions for department stores, and pro-motional fixtures for stores. The com-pany’s office is furnished with furniture made of Re-board, as shown in the photo below. The chair, for example, looks like wood, but it is made of pa-per material. “It’s been about six years since it was made, but I don’t see any damage to it as furniture,” says Sato.
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