| 摘要 |
PURPOSE: A manufacturing method of a Braille block is provided to extend the service life thereof by preventing discoloration and decoloration caused by moisture and ultraviolet rays. CONSTITUTION: A manufacturing method of a Braille block is as follows. A composition for an upper block of a Braille block is injected into a mold. The composition comprises unsaturated polyester resin, unsaturated ester gel coat, talc, and a hardener. A block for a lower plate of the Braille block is put into the mold and molded and semi-cured. The surface of the semi-cured block is washed with acetone and sanded. The surface of the sanded block is coated with a coating composition.
|
