To provide biodegradable plastics, for which it is desirable that a mold member is brought to a biodegradable state from the problem of a waste and which have a small strength and have physical properties as the substitute of conventional general-purpose plastics.
The mold member for forming an irregular pattern is used for a construction method in which the mold member is stuck on a section, to which the recessed section of a surface to be constructed must be formed, a coating material is applied, the coating material is cured and the mold member is removed. A main body is composed of the foam of a biodegradable cross-linking type polyester cross-linked by the emission of an ionizing radiation, and constituted of a material mainly comprising a substance having an expansion ratio of 1.5 to 25 times.
OKA YOSHIYUKI
OSADA HIDEHARU
SHIBAMOTO HIRONOBU
OSADA GIKEN CO LTD