木材チップの圧密加工による無接着剤ボードおよび容器の製造

概要

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For effective utilization of waste wood, binderless board and cup were made of lumber chip by compressive shaping. Sugi shavings were used as lumber chip. Lumber chips were hardened by compressed in the die and heated in a furnace for a few minutes and cooled at room temperature. Binderless board could be produced when specific gravity was more than 0.4. Modulus of rapture was most high when heating temperature was 180C and heating time was 60min, and the maximum value was about 6N/(mm)^2 when specific gravity was 0.9. Conformability to the die inscribed triangular and rectangle grooves became good as forming pressure became large, but limit of conformability existed. Conforming height was most high when groove angle was 30 or 45. Binderless cup without crack could be produced when convex die was under the chip and the tip of convex die was hemisphere. Load carrying capacity of the cup was 2∿7.5kN.
2001-10-25