| 摘要 |
PROBLEM TO BE SOLVED: To produce multi-layer woody plates different in color and hardness having excellent dimensional stability and good forming properties and to provide the plates as engraving plate products. SOLUTION: A material in which a colored inorganic pigment is added/mixed into a simple substance or a composite material of vegetable fiber waste such as crushed used paper, wood powder, Manila hemp, and bagasse, crushed desulfurized waste rubber, and a soft resin are mixed, kneaded, extruded, and molded by a plurality of extruders to produce the multi-layer woody plates different in color and hardness. The plates are cut in a prescribed size to manufacture engraving plates. |
