| 摘要 |
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≤10 MPa compressive elasticity modulus under a water-saturated state. Preferably, the biodegradable particles are characterized by consisting of a water-insoluble polymer A having≥1 and <50 MPa tensile elastic modulus of its film under the water-saturated state and a water-insoluble polymer B having≥50 MPa tensile elastic modulus of its film under the water-saturated state. COPYRIGHT: (C)2007,JPO&INPIT
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