Science and Technology of Energetic Materials

Vol.69, No.4 (2008)

Research paper

Developments of shell case for fire works aerial shell made by biodegradable plastic (I) – Study of biodegradable plastic compound for shells case –(*in Japanese)
Makoto Kudo, Kenji Murata, Satoru Kamata, and Fumio Hamada


Seeking to improve the safety of fireworks, we developed a new and high-safety aerial shell made of biodegradable plastic, which will be shattering into fragments when it explodes in midair. In order to regulate the size of fragments of the plastic at explosion, it was found that an addition of non-compatible powder, which was made from plant chaff, was effective. It was recognized that an addition of polyvinyl alcohol (PVA) was effective to increase adhesion of water-soluble glue. In this study, we found concerning the method of designing of the aerial shell for the safety fireworks by tensile strength test and impact test results, which would be broken into very fine fragments at explosion and could be used for a wide range of chrysanthemum-style fireworks ranging from 2.5 gou(70 mm) to 10 gou(270 mm) shells. In addition, it seems that those shells can be used for signal flares.

> Full text (Open access*)


Arial Shell, Biodegradable plastic, Shell case, Safety engineering.  

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