Terumo Kabushiki Kaisha

Mcpp Innovation LLC

Keiko Fukushi

Yoshihiko Abe

Kanae Karube

Tsuyoshi Yoshimoto

A syringe assembly of the present invention is composed of an outer cylinder and a seal cap. The outer cylinder has an outer cylinder body part, a piercing needle mounting part, and a piercing needle fixed to the piercing needle mounting part. The seal cap has a closed distal end part, an open proximal end part, a piercing needle mounting part-accommodating part accommodating a distal end portion of the piercing needle mounting part, a piercing needle accommodating part, and a pierceable part into which the piercing needle tip is pierceable. A polyparaxylylene coating is provided on an inner surface of the piercing needle mounting part-accommodating part of the seal cap or on an outer surface of the piercing needle mounting part of the outer cylinder. The inner surface of the piercing needle mounting part-accommodating part of the seal cap and the outer surface of the piercing needle mounting part of the outer cylinder are kept in close contact with each other through the polyparaxylylene coating.

Syringe assembly, syringe assembly packaging, outer cylinder seal cap, and prefilled syringe

An assembly of the present invention for a syringe is composed of a barrel, made of cyclic polyolefin, which has a barrel body having a distal end part and a piercing needle which has a piercing needle tip at its distal end and is fixed to a piercing needle fixing portion of the barrel and a seal cap mounted on the barrel. The seal cap is formed of a thermoplastic elastomer composition containing as its main component a mixture of a styrene-based thermoplastic elastomer and a softener, for hydrocarbon-based rubber, which has a kinematic viscosity of 1 to 5,000 mmsat 100 degrees C. and a naphthenic carbon ratio (% CN) of not more than 20% when said naphthenic carbon ratio is measured by ring analysis.

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Hadano, Japan

Keiko Fukushi