PROBLEM TO BE SOLVED: To provide biodegradable particles of which material is smoothly decomposed after passing through a specific period and the decomposed components can be finally absorbed or discharged to the outside of a body, capable of being molded without being aggregated or agglomerated among particles, conveyed or injected, in a fine caliber tube of a catheter, needle or syringe of mainly medical or medicinal use or in blood vessel, having a smaller inner diameter than the particle size without causing clogging by their aggregation.SOLUTION: The biodegradable particles are characterized by having &le10 MPa compressive elasticity modulus under a water-saturated state. Preferably, the biodegradable particles are characterized by consisting of a water-insoluble polymer A having &ge1 and <50 MPa tensile elastic modulus of its film under the water-saturated state and a water-insoluble polymer B having &ge50 MPa tensile elastic modulus of its film under the water-saturated state.COPYRIGHT: (C)2007,JPO&INPIT【課題】本発明は、粒子間で凝集あるいは固結することなく成形することが可能であり、主に医薬医療用途であるカテーテルやニードル、注射器などの器具が有する、その粒子サイズよりも小さい内径を持つ微小口径の管内、あるいは血管内において凝集詰まりを起こすことなく搬送・注入でき、特定期間経過後に材料がスムーズに分解し、最終的に分解成分が吸収され得る、または体外へ排出可能であるような生分解性粒子を提供することを目的とする。【解決手段】飽和含水状態での粒子の圧縮弾性率が10MPa以下であることを特徴とする生分解性粒子。【選択図】 なし
