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Leak stop plug against needle piretcing and method of manufacturing thereof

A technique of acupuncture and ontology, which can be applied to other household utensils, packaged foods, types of packaged items, etc., and can solve problems such as unsatisfactory results and leakage of medicinal liquid.

Inactive Publication Date: 2004-04-14
TAISEI PLAS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of relatively harsh acupuncture conditions, there is often a small amount of liquid medicine leaking out, which cannot achieve satisfactory results and may not meet the needs of users.

Method used

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  • Leak stop plug against needle piretcing and method of manufacturing thereof
  • Leak stop plug against needle piretcing and method of manufacturing thereof
  • Leak stop plug against needle piretcing and method of manufacturing thereof

Examples

Experimental program
Comparison scheme
Effect test

experiment example

[0073] Next, in order to confirm the performance of the needle-punched stopper 5 produced in the first embodiment, a test was carried out under the following conditions. In the acupuncture part 11, it is a styrene-based elastomer, and "Septon 4077" (trademark) (material: SEEPS system, molecular weight 300,000) of Kuraray Co., Ltd. is used as the base polymer; Septon 4077 / paraffin oil / polypropylene is used The combination is 40 / 50 / 10, and the material is mixed and extruded by a biaxial rolling mill, and the hardness is JISA hardness 49.

[0074] In the stopper main body 10, polypropylene (BCO3C manufactured by Nippon Polychem) was used as a thermoplastic synthetic resin, and molded under the following molding conditions.

[0075] Injection molding conditions: the injection temperature of the stopper body 10 is 210°C, the pressure is 78Mpa (800kgf / cm 2 ); the injection temperature of the acupuncture part 11 is 200°C, the pressure is 49MPa (500kgf / cm 2 ). The wall thickness of...

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Abstract

A pierceable stopper enhanced in elasticity so that the liquid in a container will not leak even after a hollow needle inserted into the container through the pierceable stopper has been removed therefrom and a method of producing the pierceable stopper are provided. A pierceable part (11) through which a hollow needle is inserted into a container (2) is molded from a thermoplastic synthetic resin elastic material. The pierceable part is heat-treated with heated air at a temperature of from 80 to 120 DEG C to remove the internal stress. The heat-treated pierceable part (11) is inserted into an injection mold (20, 21). A molten thermoplastic synthetic resin is injected into a cavity (26) corresponding to a stopper body (10), which is defined by the injection mold (20, 21) and the pierceable part (11), to form a pierceable stopper (5).

Description

technical field [0001] The present invention relates to a needle piercing stopper for a liquid container for piercing a needle from the outside to the inside, and a method for manufacturing the same. In particular, the present invention relates to a needle for injection or infusion that can be easily inserted into a liquid medicine bottle, a liquid medicine bag, etc. that contain a medical medicine liquid without leaking, and is made of a thermoplastic synthetic resin elastomer and a thermoplastic synthetic resin. Needle-punched stopper having a needle-punched portion reinforced with its elastic force and a method of manufacturing the same. Background technique [0002] A sealed container containing a drug solution for injection, a drug solution bottle or a drug solution bag filled with an intravenous drip solution, preferably the inner drug solution can be taken out without removing the cap or stopper, or injected into the interior. Therefore, the cap and the stopper are ...

Claims

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Application Information

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IPC IPC(8): A61J1/00A61J1/14
CPCB29C45/1676A61J1/1406B29L2031/565B65D51/221B65D51/002
Inventor 成富正德白石雅夫高桥正雄
Owner TAISEI PLAS CO LTD