RU203827U1 - Medical vial stopper - Google Patents

Abstract

The utility model relates to the field of medical equipment and concerns stoppers for hermetic sealing of medical vials. The technical result is the possibility of manufacturing a cork stopper for a medical vial by injection molding, excluding the stage of vulcanization. The capping stopper for a medical vial contains a cap and a cylindrical base, connected as a whole, and installed in the neck of the vial, the stopper being made of a thermoplastic elastomer material.

Description

The utility model relates to the field of medical equipment and concerns stoppers for hermetic sealing of medical vials.

Known cork for sealing medical vials, containing interconnected as a whole cap and installed in the neck of the bottle base, the upper part of which is cylindrical and goes into the lower part, made in the form of a truncated cone, while the cork is made of rubber [https: // ametistglass.com/kryshki-i-nasadki/rezinovaya-probka-32-mm-soil-dlya-flakonov/].

The closest to the claimed utility model is a stopper for sealing vials with blood, its substitutes and infusion solutions, containing a cap and a cylindrical base connected together as a whole and installed in the neck of the bottle, while the stopper is made of rubber, and the cap contains a recess for fixing protective aluminum cap with a plastic cap on the medical bottle. [https://www.vipsmed.ru/sections/mediczinskie-izdeliya/ukuporochnyie-materialyi/probki-mediczinskie/probki-rezinovyie-mediczinskie-4cz].

The disadvantage of the above plugs is that their manufacturing technology includes a vulcanization stage, which is a laborious process.

The objective of the utility model is to reduce the production cost of a closure for a medical bottle due to the possibility of multiple recycling of waste in the manufacture of products.

The technical result is the possibility of manufacturing a cork stopper for a medical vial by injection molding, excluding the stage of vulcanization.

The technical result is achieved in that the stopper for a medical vial contains a cap and a cylindrical base, connected as a whole, and installed in the neck of the vial, the stopper being made of thermoplastic elastomer material.

There is a variant in which the cork is made of a material based on a styrenic block copolymer.

There is a variant in which the cork is made of a material based on a block copolymer of styrene and butadiene.

There is a variant in which the cork is made of a material based on a block copolymer of styrene, ethylene and butadiene.

There is an option in which the cork material additionally contains thermoplastic.

There is an option in which polyethylene or polypropylene is used as a thermoplastic.

There is an option in which the cap contains a recess for attaching a protective aluminum cap with a plastic cap to the medical vial.

FIG. 1 shows a closure for a medical vial in a private version (section, front view).

FIG. 2 shows a closure for a medical vial in a private version (top view).

The closure plug for a medical vial contains a cap 1 (Fig. 1, 2) and a cylindrical base 2 (Fig. 1), interconnected as a whole. In a private embodiment, the head 1 contains a recess 3.

When used together with a medical vial, the cork is pierced with a needle.

The plug is manufactured in a single structure by injection molding. The technological process includes injection of a melt of polymer material under pressure into an injection mold, followed by its cooling. As equipment for carrying out the technological process, an injection molding machine is used, consisting of a cylinder and a screw with a reciprocating motion. When the area of the cylinder is filled with molten polymer material, the screw is pushed forward to push the material through the channels of the casting hole into the mold reservoir. Process parameters are selected based on the physical properties of the polymer material. In particular, when thermopoelastoplastic materials are used, which are mixtures of styrene block copolymers (for example, a block copolymer of styrene and butadiene; a block copolymer of styrene, ethylene and butadiene) with thermoplastics (for example, polyethylene, polypropylene), the melt temperature is 190-200 ° C, the injection pressure is 1.0 - 5.5 MPa, the temperature in the mold is 22–32 ° C, and the shrinkage level is 0.3–0.5%.

Making the plug from thermoplastic elastomer material allows it to be manufactured by injection molding, excluding the stage of vulcanization, with the possibility of multiple recycling of waste, which in turn leads to a decrease in the cost of the product.

The use of styrene block copolymers as a thermoplastic elastoplastic material of the cork makes it possible to obtain a product with properties such as wear resistance, impact resistance, and elasticity at low temperatures. In addition, the material has good fluidity and is excellent for injection molding. Strength properties are due to the presence of styrene homopolymer blocks in the material structure, while elasticity is achieved due to the presence of ethylene and butadiene homopolymer blocks in the material structure. In addition, the elasticity and flowability can be further increased by adding thermoplastics such as polyethylene or polypropylene to the styrenic block copolymers.

The presence of a recess in the cap of the cork allows the protective aluminum cap with a plastic cap to be attached to the medical vial.

Claims (3)

1. A stopper for a medical vial, containing a cap and a cylindrical base, connected as a whole, installed in the neck of the vial, characterized in that the stopper is made of a material based on a block copolymer of styrene and butadiene with the addition of a thermoplastic. 2. A closure according to claim 1, characterized in that polyethylene is used as the thermoplastic. 3. A closure according to claim 1, characterized in that polypropylene is used as the thermoplastic.

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