JPH0546458Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is applicable to intravenous infusions such as carbohydrate infusions, electrolyte infusions, plasma expanders, osmotic collapsing diuretics, amino acid infusions, fat emulsions, and high-calorie infusions. This invention relates to a stopper for a plastic container for infusion containing infusions for injection.

[Prior Art] As a stopper for this type of plastic container for infusions, a rubber stopper is tightly fitted into the stopper welded to the mouth of the container body to seal it, and the bottom surface is further covered with a thin plastic film. The structure is, for example, Jikko 58
It is described in the -37396 publication.

[Problem to be solved by the invention] In the stopper of the conventional plastic container for infusion, as shown in FIG. 4, the stopper b protrudes from the container body a, and there is a The rubber plug c is tightly fitted, and the lower surface of the rubber plug c is covered with a thin film d made of a plastic film, and the peripheral edge of the plastic thin film d covering the lower surface of the rubber plug c is gripped. Therefore, when a syringe needle is inserted into the rubber stopper c during infusion, the thin plastic film d may come off and fall into the container body a, resulting in the inconvenience that infusions often become impossible.

In view of the problems with conventional stoppers for plastic containers for infusions of this type, the present invention involves inserting a rubber elastic sealing body during injection molding of the outer stopper, and inserting the bottom surface of the container body side into the rubber elastic sealing body. By laminating plastic thin films that cover at least the circumferential surface, and by welding and integrating the peripheral surface of the plastic thin film corresponding to the circumferential surface of the rubber elastic sealing body to the outer stopper, it is possible to inject into the rubber elastic sealing body during infusion. There is no risk of the plastic thin film falling off when the needle is inserted, and the rubber elastic sealing body is completely covered with a plastic thin film whose outer circumferential surface is welded to the outer stopper to ensure that the infusion solution enters the rubber elastic sealing body. It is an object of the present invention to provide a stopper for a plastic container for infusion, which can prevent such problems and maintain excellent sanitary conditions.

[Means for solving the problem] The present invention is configured as follows as a technical means for achieving the object.

That is, the structure is that of a plastic container for infusion, in which a cylindrical outer stopper that is fixed to the mouth of the container body contains a rubber elastic sealing body that seals the opening, and the outer stopper is equipped with an opening means. In the stopper body, a rubber elastic sealing body is inserted during injection molding of the outer stopper, and a thin plastic film is laminated to the rubber elastic sealing body to cover the lower surface and at least the circumferential surface of the container body side, and the rubber elastic sealing body is This is a stopper for a plastic container for infusion, characterized in that the peripheral surface of a corresponding plastic thin film is integrally welded to the outer stopper.

[Function] Since the stopper of the plastic container for infusion according to the present invention is constructed as described above, the plastic thin film laminated and covering the bottom surface of the rubber elastic sealing body and at least the circumferential surface thereof has a circumferential portion that is external. It is integrally welded to the stopper, and its grip is perfect. Therefore, there is no risk of the plastic thin film falling off when a syringe needle is inserted into the rubber elastic seal during infusion. Further, since the rubber elastic sealing body is completely covered with a thin plastic film that is integrally welded to the outer stopper, the infusion liquid does not penetrate into the rubber elastic sealing body, and the infusion liquid is kept sanitary.

[Example] Embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an outer stopper of a plastic container for infusion, and this outer stopper 1 has a cylindrical shape that is fixed to the opening of the container body 2. As shown in FIG. 3 is a welded portion with the opening of the container body 2. The outer plug 1 is formed by injection molding. During the injection molding, a rubber elastic seal 4 is inserted and enclosed, and the opening of the outer plug 1 is sealed. A plastic thin film 5 is laminated on the lower surface 4a and peripheral surface 4b of the container body 2, and the peripheral surface 5a of the plastic thin film 5 is welded and integrated with the outer plug 1. A step portion 4c is formed at the center of the lower surface of the rubber elastic sealing body 4 for positioning during insertion. 6 is a rubber elastic sealing body 4 of the outer plug 1
This is the gripping part. The top wall 7 of the outer stopper 1 is sealed, and the center part thereof is an unsealing part by a pull ring 8, and 9 is formed into an annular thin part by the score of the pull ring 8. The plastic constituting the outer plug 1 is a thermoplastic plastic such as polyethylene or polypropylene, but the plastic thin film 5
The material used is the same as that of the outer plug 1, or if it is a different material, one that is highly compatible with the material of the outer plug 1 is used. The rubber elastic sealing body 4 is preferably one that has high heat resistance and can withstand high temperatures during injection molding.

In addition, the container body 2 of the plastic container for infusion
is manufactured by blow molding thermoplastic plastic such as polyethylene or polypropylene.

According to the stopper of the plastic container for infusion configured as described above, the lower surface 4a of the rubber elastic sealing body 4
The plastic thin film 5 laminated and covering the circumferential surface 4b can be completely gripped because the circumferential surface 5a is integrally welded to the outer plug 1. Therefore,
There is no risk that the plastic thin film 5 will fall off when a syringe needle is inserted into the rubber elastic sealing body 4 during infusion.
Further, the rubber elastic sealing body 4 has a peripheral surface 5a connected to the outer plug 1.
Since it is completely covered with the plastic thin film 5 which is integrally welded to the rubber elastic sealing body 4, the infusion liquid does not penetrate into the rubber elastic sealing body 4, and the infusion liquid is kept sanitary.

FIGS. 2 and 3 show other examples of the above embodiment, respectively.

In another example shown in FIG. 2, the entire surface of the rubber elastic seal 4 is laminated with a plastic thin film 5, and a circumferential groove 4d is formed on the circumferential surface of the rubber elastic seal 4. It is engaged with a circumferential convex portion 10 formed on the inner circumferential surface of the stopper 1. Therefore, the circumferential surface portion 5a of the plastic thin film 5 is welded and integrated with the circumferential groove 4d and the circumferential convex portion 10 while being firmly held. Further, the top surface of the outer plug 1 is opened and sealed with an easily openable film 11.

Another example shown in FIG.
A wedge-shaped circumferential convex portion 4e is formed on the circumferential surface of the outer plug 1, and a wedge-shaped circumferential concave portion 12 is formed on the inner circumferential surface of the outer plug 1 to maintain a more solid engagement state.

[Effects of the invention] As described above, the present invention includes a cylindrical outer plug that is fixed to the mouth of the container body, and a rubber elastic sealing body that seals the opening thereof, and a means for opening the outer plug. In the stopper of the plastic container for infusion, a rubber elastic sealing body is inserted during injection molding of the outer stopper, and a thin plastic film is laminated to the rubber elastic sealing body to cover the lower surface and at least the circumferential surface of the container body side. In addition, since the peripheral surface of the plastic thin film corresponding to the peripheral surface of the rubber elastic sealing body is integrally welded to the outer stopper, the plastic thin film will fall off when a syringe needle is inserted into the rubber elastic sealing body during infusion. In addition, the rubber elastic sealing body is completely covered with a thin plastic film that is welded on the entire circumference to the outer stopper, which reliably prevents infusion from entering the rubber elastic sealing body, thereby providing excellent hygiene. It is possible to obtain a stopper for a plastic container for infusion that can be maintained.

[Brief explanation of the drawing]

1 to 3 each show an embodiment of the present invention, FIGS. 1 and 2 are longitudinal sectional front views of a part of the plastic container for infusion, and FIG. 3 is a longitudinal sectional view showing a part of the stopper. It is a front view. FIG. 4 is a longitudinal sectional front view of a part of a conventional plastic container for infusion. DESCRIPTION OF SYMBOLS 1...Outer plug, 2...Container body, 4...Rubber elastic sealing body, 5...Plastic thin film, 8...Pull ring, 11...Easy-to-open film.

Claims (1)

[Scope of utility model registration request] In the closure body of a plastic container for infusion, the outer closure is comprised of a cylindrical outer closure that is fixed to the mouth of the container body, and a rubber elastic sealing body that seals the opening of the closure, and the outer closure is equipped with an opening means. At the same time as inserting a rubber elastic sealing body during injection molding, a thin plastic film covering the lower surface and at least the circumferential surface of the container body side is laminated to the rubber elastic sealing body, and a plastic film corresponding to the circumferential surface of the rubber elastic sealing body is laminated to the rubber elastic sealing body. A stopper for a plastic container for infusions, characterized in that a peripheral surface of a thin film is integrally welded to an outer stopper.