PURPOSE: To provide an injection syringe having no seepage of an eluate into a medicine and excellent in chemical resistance, transparency, and size stability by forming the syringe with a random copolymer of ethylene and a tetracyclo[4. 4. 0. l2.5. 12.5. 17.10-3-dodecene derivative.
CONSTITUTION: This plastic injection syringe has no seepage of an eluate from a plastic into the medicine stored in the syringe and is excellent in steam cutoff property. The syringe is formed with a random copolymer (PETD) of ethylene and a tetracyclo[4. 4. 0. 12.5. 17.10-3-dodecene derivative (TCD). The inner face and outer face of the syringe are made roughened surfaces, and the average roughness of the roughened surfaces is preferably set to 0.1μm or above. A gasket is made of a polyethylene. The material expressed by the formula is properly used for the TCD, where R is the hydrogen atom or CnH2n+1 group (n=1-180.
FUTAGAWA JUN
ARAMATA AKIFUMI
ARIFUKU HIROSHI
YAGI HIDEKI
