KR102350984B1 - A medical cap and a container having the same - Google Patents

Abstract

The present invention, in the medical cap coupled to the inlet of the container, the screw thread formed on the inner wall surface of the side of the cap; It includes a rib extending downward from the inner surface of the cap upper portion of the medical cap, the length of the rib is 5mm or more relates to a medical cap and a container having the same.

Description

Medical cap and container having the same

The present invention relates to a medical cap and a container comprising the same.

In general, a medical container such as a sterile container refers to a medicine bottle or a storage container that maintains a sterile state of internal storage materials, such as a sterile injection solution, and is sealed to prevent leakage and deterioration of stored contents and to block the inflow of foreign substances from the outside. has been processed.

For example, in order to seal the sterilization container, a plastic body and a rubber stopper are combined to use a closure.

The plastic body and the rubber stopper are coupled to each other by assembling the plastic body and the rubber stopper separately, or by inserting the rubber stopper and injecting the plastic. The stopper manufactured in this way is used after the plastic body part is adhered to the end of the plastic injection bottle or injection bag sealing port by heat sealing or the like.

However, such a conventional stopper has a disadvantage in that the number of parts is large and the manufacturing process is complicated, so the manufacturing cost is high.

In addition, Korean Patent Publication No. 10-1247398 discloses a medical rubber stopper, but in the case of a stopper combined with such a medical rubber stopper, leakage occurs due to the internal pressure and contraction of the container during the sterilization process, and the stopper part Since the bonding force between them is weak, problems such as separation of the rubber transition plastic body or gaps between the stopper parts, causing air to flow into the container, may cause problems such as deterioration of the injection solution.

Republic of Korea Patent Publication No. 10-1247398

An object of the present invention is to provide a medical cap capable of providing excellent sealing force without using heat sealing and rubber seal, and a container including the same.

The present invention in a medical cap coupled to the inlet of the container,

a screw thread formed on the inner wall surface of the cap side; and a rib extending downward from the inner surface of the cap upper portion of the medical cap, wherein the length of the rib is 5 mm or more.

Preferably, the rib can extend to a maximum height up to just before the thread of the container and the thread of the cap abut.

In addition, it is preferable that the rib is formed to extend outwardly from the inlet of the container at an angle of 13° or more and 16° or less from the vertical plane.

In addition, the rib may be configured such that the thickness of the upper end in contact with the inner surface of the cap is thinner than the thickness of the lower end in contact with the inner surface of the inlet of the container.

In this case, the rib may be configured such that the upper end in contact with the inner surface of the cap has a thickness of less than 1 mm, and the lower end in contact with the inner surface of the inlet of the container has a thickness of 1 to 2 mm.

The rib may have an annular shape so that, when the medical cap is coupled to the inlet of the container, the inner circumferential surface of the inlet of the container and the outer circumferential surface of the rib contact each other.

Medical cap of the present invention is polyethylene (Poly Ethylene; PE), polyethylene terephthalate (PET), polypropylene (Poly Propylene; PP), PBT (Polybutylene terephthalate), EVA (ethylene-vinyl acetate), HDPE (High Density Polyethylene), HDPE (High Density Polyethylene), LDPE (Low Density Polyethylene), POM (Polyoxymethylene) and PA (Polyamide) may be a molded article formed from a resin composition containing at least one selected from the group consisting of.

In addition, the medical cap of the present invention is formed to extend in the longitudinal direction at the lower end of the cap side portion, and a ring having a rupture line including a plurality of bridges formed therein is disposed in a portion connected to the lower end.

A plurality of undercuts formed at regular intervals on the inner peripheral surface of the ring; and a plurality of ring tucks disposed between the bridge and the undercut may be formed.

The plurality of undercuts and ring tucks may be formed by 8 and 12, respectively.

In addition, the present invention provides a container having the above-described medical cap, and the thickness of the inlet is 1.9 to 2.0 mm.

A support ring on which the ring of the cap is seated may be further provided at a lower portion of the injection hole along the circumference of the injection hole.

The container of the present invention may have a skirting ring formed along the outer periphery of the injection hole in the lower part of the screw thread.

The container may be a sterile container in which the sterilization process is performed while the medical cap is coupled to the inlet of the container.

The present invention uses a medical cap including a rib of a specific structure and a container having an inlet of a specific thickness range having the medical cap, so that the inlet of the container in contact with the cap is completely sealed by the shrinkage of the container during the sterilization process. It can provide the effect that leakage does not occur even during distribution and storage under conditions.

In addition, the present invention can prevent the problem that the ring is attached to the cap separated from the container by significantly lowering the defect rate in which the bridge of the ring does not break when the cap is opened.

1 is a cross-sectional view showing a medical cap coupled to the inlet of the container according to an embodiment of the present invention.
2 is a view showing a medical cap in a state separated from the inlet of the container according to an embodiment of the present invention.
FIG. 3 is an enlarged view of a detailed portion of the medical cap of FIG. 1 .
4 is a view showing a ring of a medical cap according to an embodiment of the present invention.
5 is a photograph showing an example of the control 3 in Experimental Example (2).

Hereinafter, with reference to the drawings, an embodiment of the present invention will be described in more detail. However, the following drawings attached to the present specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the above-described content of the present invention, so the present invention is described in such drawings It should not be construed as being limited only to the matters.

1 is a cross-sectional view showing a medical cap coupled to the inlet of the container according to an embodiment of the present invention, Figure 2 is a view showing the medical cap in a state separated from the inlet of the container according to an embodiment of the present invention, 3 is an enlarged view of the detailed portion of the medical cap of FIG. 1, and FIG. 4 is a view showing the ring of the medical cap according to an embodiment of the present invention.

The medical cap 100 of the present invention, as a cover for sealing the container, is coupled to the inlet 210 of the container 200 .

1 to 2, the medical cap 100 of the present invention is a cap upper portion 110 disposed above the injection port 210 of the container 200, and downward from the outer periphery of the cap upper portion 110. It extends and has a cap side portion 120 disposed to surround the outer periphery of the injection hole (210).

The medical cap 100 is to seal the injection port 210 of the container by coupling to the outer peripheral surface of the injection port 210 of the container provided with the screw thread 220 . Accordingly, on the inner wall surface of the cap side portion 120, a screw thread 130 that engages with the screw thread 220 formed on the outer circumferential surface of the inlet of the container is formed.

Each screw thread provided on the inner wall surface of the injection port 210 of the container and the cap side portion 120 of the medical cap acts as a male screw on one side and a female screw on the other side.

A rib 140 is provided on the inner surface of the cap upper part 110 . The rib 140 is configured to completely seal the container by being in close contact with the injection port 210 due to the contraction of the container during the sterilization process. To this end, preferably, the rib 140 has an annular shape so that, when the medical cap 100 is coupled to the inlet 210 of the container, the inner circumferential surface of the inlet 210 of the container and the outer circumferential surface of the rib 140 abut, can have

3, the medical cap 100 according to the present invention is a container when the internal pressure (F) applied to the inner surface 140c of the rib 140 is greater than the pressure applied between the rib 140 and the container. It is possible to effectively prevent leakage of liquid by pressurization and cap loosening. In this aspect, the rib length (L) of the present invention may be formed to a length of 5 mm or more.

On the other hand, after the screw thread 130 of the cap is fastened to the screw thread 220 of the container, the uppermost end 140d of the rib 140 must touch the uppermost end 210a of the container so that capping can be efficiently performed, If the length of the rib 140 is excessive, the efficiency of capping may be reduced. Therefore, the maximum length of the rib 140 is preferably a length corresponding to the height (A) just before the screw thread of the container and the screw thread of the cap contact.

For example, the length (L) of the rib 140 is more preferably formed to be 5mm or more to less than 6mm.

In one embodiment of the present invention, in order for the outer circumferential surface of the rib 140 to effectively adhere to the inner circumferential surface of the container, the rib 140 is positioned outside the inlet port of the container at an angle of 13° or more from the vertical surface of the cap upper part 110 . It is preferable to extend in the direction.

When the angle of the rib 140 is too large, excessively high strength is required when the cap coupled to the container through the sterilization process is opened, and capping may not occur. Accordingly, the angle of the rib of the present invention is preferably 13˚ to 16˚. More preferably, the rib angle of the present invention may be formed to 13˚.

In the present invention, the medical cap 100 is an upper end that is in contact with the inner circumferential surface of the cap upper part 110 so that the rib 140 easily comes into contact with the inner circumferential surface of the container inlet 210 when the internal pressure rises due to the sterilization process and/or external pressurization. The thickness (width) of (140a) may be formed thinner than the thickness (width) of the lower end (140b) in contact with the inner surface of the inlet of the container. In this case, the upper end 140a of the rib 140 has relatively increased flexibility compared to the lower end 140b, so that it can be in closer contact with the inside of the container inlet.

To this end, in the rib 140 of the present invention, the upper end 140a in contact with the inner surface of the cap upper portion 110 has a thickness of less than 1 mm, and the lower end 140b in contact with the inner surface of the inlet of the container is 1 to 2 It may be configured to have a thickness of mm. More preferably, when the upper end of the rib is 0.5 mm and the lower end is 1 mm, the leakage rate can be significantly reduced.

The medical cap 100 of the present invention is used as a sterile container cap for accommodating a sterile injection, and the material is not particularly limited, but in consideration of the shrinkage rate during the sterilization process, polyethylene ( Poly Ethylene; PE), Polyethylene terephthalate (PET), Poly Propylene (PP), PBT (Polybutylene terephthalate), EVA (ethylene-vinyl acetate), HDPE (High Density Polyethylene), HDPE (High Density) Polyethylene), LDPE (Low Density Polyethylene), POM (Polyoxymethylene), PA (Polyamide), and the like is preferably formed of a resin composition containing at least one selected from the group consisting of. For example, the medical cap 100 of the present invention may be a molded body formed from the resin composition containing the above-described components, and may preferably contain polypropylene (PP).

The medical cap 100 is mounted in a sterilization container and the effect is maximized when the sterilization process is performed. However, the use of the medical cap 100 is not limited to the sterile container.

Raw material name mold shrinkage PP (Polypropylene) 1.0-2.5 PET (Polyethylene terephthalate) 2.0~2.5 Polybutylene terephthalate (PBT) 1.3~2.4 EVA (ethylene-vinyl acetate) 0.5~1.5 HDPE (High Density Polyethylene) 1.2~2.2 LDPE (Low Density Polyethylene) 1.5~3.0 Polyoxymethylene (POM) 0.8~3.5 PA (Polyamide) 0.6~2.5

2 and 4, the medical cap 100 of the present invention is formed to extend in the longitudinal direction at the lower end of the cap side portion 120, and a rupture line including a plurality of bridges 151 at a portion connected to the lower end ( A ring 150 on which 152 is formed is disposed.

A plurality of undercuts 153 formed at regular intervals and a plurality of ring tucks 154 disposed between the bridge 151 and the undercut 153 are formed on the inner circumferential surface of the ring 150 . For example, the plurality of ring tucks 154 may be formed with each of the ring tucks spaced apart from each other at regular intervals.

In the present invention, when the medical cap 100 coupled to the inlet 210 of the container is rotated in the open direction, the bridge 151 is cut and the rupture line 152 is ruptured, at this time formed on the inner surface of the ring 150 A plurality of undercuts 153 and the ring tuck 154 are caught by the inlet 210 of the container and the cap 100 is separated from the ring 150 by rotation and rises, while the ring 150 prevents upward movement. do. That is, when the medical cap rotates, a tensile force is applied to the bridge 151 connecting the lower end of the cap 100 and the ring 150, the bridge 151 is broken, and the ring 150 is separated from the lower end of the cap. The cap 100 is configured to open.

In the present invention, the ring tuck 154 and the undercut 153 are provided in a specific number so that the ring does not come out of the cap separated from the container by significantly reducing the defect rate in which the bridge 151 of the ring 150 does not break when the cap is opened. can be

For example, the undercut 153 of the present invention maintains the fixed state of the ring 150 and may be preferably formed in eight pieces so that the cap is not arbitrarily loosened. As such, when the number of undercuts 153 is 8, the cap and the ring can be smoothly separated when the cap is opened. In the present invention, when the number of undercuts 153 is formed to be less than 8, a problem in which the ring 150 is not fixed may occur. When the number of undercuts 153 exceeds 8, the ring 150 is not caught on the skirt ring 240 when the cap is opened, so that the ring 150 is not separated from the lower end of the cap. There may be a problem with the ring coming out of the cap separated from the container.

In this aspect, it is most preferable that the undercut 153 of the present invention is formed in eight pieces.

Also, in the present invention, the number of ring tucks 154 may be 8 to 12. When the number of ring tucks 154 exceeds 12, the ring tuck 154 may rise above the skirt ring 240 and come out with the separated cap when the cap is opened, and the number of ring tucks 154 is less than 8. If it is formed as a problem that the ring is not fixed may occur. It is more preferable that the ring tuck 154 of the present invention is formed in 12 pieces in order to minimize the defect rate that may occur when the cap is opened.

In one embodiment, the container 200 of the present invention is provided with the medical cap 100 described above.

The container 200 of the present invention is used as a sterile container for accommodating a sterile injection and its material is not particularly limited, but in consideration of the shrinkage rate during the sterilization process, it may be made of the same material as the medical cap 100 described above. .

For example, polyethylene (Poly Ethylene; PE), polyethylene terephthalate (PET), polypropylene (PP), PBT (Polybutylene terephthalate), EVA (ethylene-vinyl acetate), ), HDPE (High Density Polyethylene), HDPE (High Density Polyethylene), LDPE (Low Density Polyethylene), POM (Polyoxymethylene), PA (Polyamide), etc. formed of a resin composition containing at least one selected from the group consisting of it is preferable The container 200 of the present invention may be a molded article formed from the resin composition containing the above-described components, and more preferably contain polypropylene (PP).

When the container is formed of the above material, there is a possibility that the inlet 210 of the container is deformed during the sterilization process due to the shrinkage rate of the material, resulting in leakage of fluid. However, the present invention can minimize the shrinkage rate even through the sterilization process by optimizing the thickness of the inlet 210 of the container to 1.9 to 2.0mm. For this reason, the present invention can improve physical properties such as leakage and open strength of the cap by minimizing the gap between the screw threads of the container and the cap.

If necessary, in the container 200 of the present invention, a support ring 230 on which the ring 150 is seated along the circumference of the injection hole 210 may be formed at the lower portion of the injection hole 210 . In the present invention, as long as the support ring 230 has a structure in which the ring 150 can be seated, its shape and structure are not particularly limited.

In the present invention, a skirt ring 240 is formed along the outer periphery of the injection hole 210 under the screw thread 220 of the container 200 . The skirting 240 may have a shape in which a plurality of serrated protrusions are formed.

The serrated protrusion 240 is configured to engage the ring tuck 154 formed on the inner circumferential surface of the ring 150 when the cap is opened, thereby preventing the ring 150 from rotating and cutting the bridge 151 efficiently. have.

Example

Hereinafter, the present invention will be described in more detail by way of Examples, but the present invention is not limited to these Examples.

(1) Test to confirm the occurrence of leakage according to the length of the rib

For the sample preparation for this experiment, a total of 700 samples were evaluated for each of the control groups 1 to 4 and the experimental groups 1 to 3, 100 each. The cap prepared as a sample has a height of 22 mm, an outer diameter of approximately 40 mm, and an inner diameter of 36 mm, and the height occupied by the ring in the entire cap is approximately 7 mm. The top of the rib was 0.5mm, the bottom of the rib was 1mm, and the rib angle was 13°, and a medical cap was manufactured using various resins including PP. At this time, the rib lengths of the control groups 1 to 4 and the experimental groups 1 to 3 were prepared with the numerical values shown in Table 2. In addition, as the container, a container having an inlet thickness of 1.9 to 2 mm was used.

First, 1L of water or a chemical solution was filled in the containers of each of the control and experimental groups prepared above, and then capped with a force of 82 kgf·cm using a capping device. After sterilization at 121° C. for about 30 minutes, 10 boxes were packaged and cooled for 5 days. Next, each control and experimental group was laid on its side, and then the tear was visually confirmed by pressing with a weight of 50 to 70 kg while loosening it step by step by 1 mm. The degree of loosening (length) just before tearing was indicated, and the degree of loosening (length) was checked with a tape measure, and the average value is shown in Table 2 (check the minimum and maximum values after checking 100 samples of each control and experimental group).

division Rib length (mm) Degree of loosening caused by leakage when the cap is opened Control 1 3.0 1mm or less Control 2 3.6 about 2mm Control 3 4.0 about 5mm Control 4 4.5 about 8mm Experimental group 1 5.0 Approx. 15-25mm Experimental group 2 5.5 Approx. 16-28mm Experimental group 3 6.0 Approx. 18-32mm

Referring to Table 2, when the rib length is less than 5 mm (control groups 1 to 4), it was confirmed that there is a risk of leakage that may occur when the skirting ring of the container is loosened to the ring tuck. And, when the rib length is 5mm or more, it can be seen that the loosening length of the medical cap until leakage occurs rapidly increases.

Furthermore, when the rib length is 6 mm or more, it was confirmed that no leakage occurs even if the rib is loosened from 18 mm to 32 mm. However, since capping is efficient only when the rib touches the top of the container after the container screw is fixed to the cap screw, the upper limit of the rib length is preferably the length (height) until just before the container screw and the cap screw contact. it can be seen that

(2) Test to confirm leakage according to rib angle

In this experiment, the same container while changing the angle of the rib for a cap that has the same material and appearance as the test to confirm leakage according to the rib length, has a rib length of 5 mm, and has a width of 0.5 mm and 1 mm at the top and bottom of the rib, respectively was tested for leakage. The samples used in the experiment were evaluated using a total of 500 samples, 100 for each of the control groups 1 to 3 and the experimental groups 1 and 2, respectively.

The evaluation conditions and evaluation method are the same as the test to confirm the occurrence of leakage according to the rib length, but in this experiment, after cooling, check the open strength, open the cap 15mm, pressurize the container to 50~70kg, and visually inspect it. Leakage was checked.

division rib angle open strength tear results Control 1 0° Approx. 8 kgf cm Leakage rate when pressurized after 15mm open: 100% Control 2 10° About 16 kgf cm Leakage rate when pressurized after 15mm open: 100% Control 3 17° About 45 kgf·cm Leakage rate when pressurized after 15mm open: 0% Experimental group 1 13° Approximately 24 kgf cm Leakage rate when pressurized after 15mm open: 0% Experimental group 2 16° About 30 kgf cm Leakage rate when pressurized after 15mm open: 0%

Referring to Table 3, if the direction of the ribs is not oblique (control group 1), the cap cannot be completely in close contact with the container only by the internal pressure of the container. Able to know. On the other hand, even when the rib angle was inclined, when the inclination angle was less than 13° (control group 2), as in the control group 1, leakage occurred in the entire sample. On the other hand, when the rib angle is 13° or more (experimental groups 1 and 2), it can be seen that no leakage occurs even when the cap is opened at 15 mm and pressurized.

On the other hand, when the angle of the rib is formed at 17° as in Control 3, as shown in FIG. 5 , the rib is pressed to the inlet of the container and pressed outward from the inlet of the container during capping, or even if the cap is properly capped in the container, the cap It was confirmed that a relatively high strength of about 45 kgf·cm is required for opening, which causes a problem in cap openability.

That is, the angle of the rib of the present invention is most preferably formed at 13° in terms of preventing the problem that excessive force is not required when the cap is opened and that the cap is not made.

(3) Test to confirm leakage according to rib width

In this experiment, for a cap with a rib length of 5mm and a rib angle of 13°, with the same material and appearance as the experiment to confirm leakage according to the rib length, while changing the width of the top and bottom of the rib, leakage in the same container The occurrence was tested. The samples used in the experiment were evaluated using a total of 400 samples, 100 for each of the control groups 1 and 2 and the experimental groups 1 and 2, respectively.

The evaluation conditions and methods were the same as the tests to confirm the occurrence of leakage according to the length of the ribs, however, in this experiment, with the cap 3mm open, the container was pressurized with 50~70kg, and leakage was visually checked.

division Rib width (mm) result Top lower Control 1 1.4 1.4 Leakage rate when pressurized after 3mm open: 100% Control 2 One 2 Leakage rate when pressurized after 3mm open: 100% Experimental group 1 0.5 One Leakage rate when pressurized after 3mm open: 0% Experimental group 2 0.5 2 Leakage rate when pressurized after 3mm open: 5%

Referring to Table 4, it can be seen that, when the rib width at the bottom is wider than the top (experimental group 1 and experimental group 2), almost no leakage occurs even when the cap is 3mm open and pressurized. On the other hand, when the width of the upper and lower ribs were the same (control group 1), it can be seen that leakage occurred in the entire sample. In addition, according to Table 4, it can be seen that the smaller the width of the upper end of the rib, the greater the leakage prevention effect. In particular, even when the lower end of the rib width is larger than the upper end, when the width of the upper end of the rib is 1 mm or more (control group 2), it can be seen that leakage occurs in the entire test sample. In addition, it can be seen that when the ratio of the width at the upper end to the lower end of the rib width is about twice or more, the occurrence of leakage can be more reliably suppressed. In particular, when the width of the upper end of the rib was 0.5 mm and the width of the lower end was 1.0 mm, no leakage occurred in all 100 samples.

From this, it can be seen that the medical cap of the present invention effectively blocks leakage by forming an optimal condition for the rib of the cap to adhere to the inner diameter of the container when the internal pressure of the container is increased by sterilization or external pressure when the rib top is 0.5 mm. .

100: medical cap
110: upper cap
120: cap side part
130: thread
140: rib
140a: rib top
140b: lower rib
140c: rib inner surface
140d: rib top
150: ring
151: bridge
152: burst line
153: undercut
154: ring tuck
200: courage
210: inlet
210a: top of container
220: thread
230: support ring
240: skirting

Claims (14)

In the sterilized container in which the sterilization process is made,
an injection hole with a thread formed on the outer circumferential surface;
A medical cap coupled to the inlet, comprising: a screw thread formed on the inner wall surface of the cap side portion; and a rib extending downward from the inner surface of the cap upper part of the medical cap, the length of the rib is 5 mm or more, and the rib is 13° or more and 16° or less from the vertical plane. an extended medical cap and
and a skirting ring formed along the outer periphery of the injection hole under the screw thread of the injection hole,
The skirting ring is made of a shape in which a plurality of serrated projections are formed, the container. The container of claim 1 , wherein the ribs extend maximally to a height just before abutment of the threads of the container and the threads of the cap. The method according to claim 1,
The rib, the thickness of the upper end in contact with the inner surface of the cap upper portion is configured to be thinner than the thickness of the lower end in contact with the inner surface of the inlet of the container, the container. 4. The method according to claim 3,
The rib is configured to have a thickness of less than 1 mm at an upper end in contact with the inner surface of the cap upper portion, and a lower end in contact with the inner surface of the inlet of the container to have a thickness of 1 to 2 mm. The method according to claim 1,
The rib has an annular shape such that, when the medical cap is coupled to the inlet of the container, the inner circumferential surface of the inlet of the container and the outer circumferential surface of the rib contact each other. The method according to claim 1,
The medical cap is, polyethylene (Poly Ethylene; PE), polyethylene terephthalate (PET), polypropylene (Poly Propylene; PP), PBT (Polybutylene terephthalate), EVA (ethylene-vinyl acetate), HDPE (High Density) Polyethylene), HDPE (High Density Polyethylene), LDPE (Low Density Polyethylene), POM (Polyoxymethylene), and PA (Polyamide) A molded body formed from a resin composition containing at least one selected from the group consisting of, a container. The method according to claim 1,
The medical cap is formed to extend in the longitudinal direction at the lower end of the cap side portion, and a ring in which a rupture line including a plurality of bridges is formed is disposed in a portion connected to the lower end. 8. The method of claim 7,
A plurality of undercuts formed at regular intervals on the inner circumferential surface of the ring; and
A container having a plurality of ring tucks disposed between the bridge and the undercut. 9. The method of claim 8,
The plurality of undercuts and ring tucks will be formed of 8 and 12, respectively, the container. 10. The method according to any one of claims 1 to 9,
The thickness of the inlet is 1.9 to 2.0 mm, the container. 11. The method of claim 10,
A support ring on which the ring of the cap is seated along the circumference of the inlet is further provided in the lower portion of the inlet, the container. The container of claim 11 , wherein the skirting ring is formed between the threaded lower portion of the container and the support ring. The method according to claim 1,
The container is a sterilization container in which the sterilization process is performed in a state in which the medical cap is coupled to the inlet of the container. delete

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