| 摘要 |
<p>A syringe (10) includes an outer cylinder (12), a gasket (20) having at least one part (28, 30) which slidably contacts the inner wall of the cylinder (12) and being made of an elastomer material including a block copolymer having styrene units at both terminal ends, and means (36) for sliding the gasket (20) inside the cylinder (12). The slidable contacting part (28, 30) is compressed within the cylinder (12) at a compressibility C (%) of a predetermined range selected according to a particular inner diameter of the cylinder (12). The product of the total contact area S (mm<2>) at the compressibility C (%) of the contacting part (28, 30) with the inner wall of the cylinder (12) with the compressibility C (%) is about 350 to about 900.</p> |
