Highly sealed PVC liquid bag

Abstract

The utility model discloses a PVC liquid bag with high sealing performance, comprising a bag body, one end of the bag body is provided with an opening, the opening is installed with a joint, one end of the joint close to the bag body is provided with a docking portion, the docking portion is flat, the docking portion and the joint are an integrally formed mechanism, the docking portion is bonded at the opening by glue, and relates to the technical field of PVC infusion bags. By setting the portion where the joint and the infusion device are docked as a flat docking portion, when infusion is performed, the opening end of the VC liquid bag faces downward, and when the opening end is squeezed by the gravity of the liquid, the opening end will still maintain its flatness, so that the opening end is not easy to be deformed, thereby maintaining a good sealing effect; and when transporting, the infusion bag is laid flat, and at this time the opening end will also be impacted by the liquid, and at this time the opening end will still maintain its flatness, so that the opening end is not easy to be deformed, thereby maintaining a good sealing effect.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC infusion bags, in particular to a PVC liquid bag with high sealing performance. Background Art

[0002] An infusion bag is a container used for intravenous infusion. It delivers nutrient solution and medicine to the patient's veins by temporarily storing and mixing nutrient solution and therapeutic medicine. It can be divided into general intravenous nutrition infusion bags and pressurized infusion bags. Infusion bags are mainly used to hold liquids during intravenous infusion, and can also be used to prevent pressure sores, hysteroscopic transurethrometrotomy, etc. Infusion bags can be divided into intravenous nutrition infusion bags, pump infusion bags, etc. Intravenous nutrition infusion bags are mainly used to hold medicines, liquids, etc. during intravenous infusion, and pressurized infusion bags are mainly used to pressurize general infusion bags or blood bags to help bagged liquids such as blood, plasma, and cardioplegia enter the human body as quickly as possible. Intravenous infusion mainly uses the principles of atmospheric pressure and liquid static pressure to inject sterile liquids, electrolytes, drugs, etc. into the body through veins.

[0003] The existing PVC infusion bag is flat as a whole, but the connector at its open end that connects with the infusion device is cylindrical. The connector is inserted into the open end of the PVC infusion bag, and then the open end of the PVC infusion bag is bent until it is in full contact with the outer surface of the connector, and then glue is used to bond the connector to the open end of the PVC infusion bag. Since the open end of the PVC infusion bag is bent, the open end of the PVC infusion bag has a tendency to return to a flat shape, especially when the infusion is being performed, the open end of the PVC infusion bag faces downward, which will aggravate the separation stress between the open end of the PVC infusion bag and the connector, so that the connector and the open end of the PVC infusion bag are easily separated, resulting in a poor sealing effect. Utility Model Content

[0004] In view of the problems existing in the existing high-sealing PVC liquid bags, the utility model is proposed.

[0005] Therefore, the purpose of the utility model is to provide a PVC liquid bag with high sealing performance, which solves the problem of the existing PVC infusion bag, which is flat as a whole, but the connector at its open end that connects with the infusion set is cylindrical, the connector is inserted into the open end of the PVC infusion bag, and then the open end of the PVC infusion bag is bent until it is in full contact with the outer surface of the connector, and then glue is used to bond the connector to the open end of the PVC infusion bag; since the open end of the PVC infusion bag is bent, the open end of the PVC infusion bag has a tendency to return to a flat shape, especially when performing infusion, the open end of the PVC infusion bag faces downward, which will aggravate the separation stress between the open end of the PVC infusion bag and the connector, so that the connector and the open end of the PVC infusion bag are easily separated, resulting in a poor sealing effect.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A highly airtight PVC liquid bag comprises a bag body, one end of which is provided with an opening, a joint is installed on the opening, an end of the joint close to the bag body is provided with a docking portion, and the docking portion is flat.

[0008] As a preferred solution of the high-sealability PVC liquid bag described in the utility model, the butt joint and the joint are an integrally formed structure.

[0009] As a preferred solution of the high-sealability PVC liquid bag described in the utility model, wherein: the butt joint is bonded to the opening by glue, and a first bonding layer is formed between the outer wall of the butt joint and the inner wall of the opening.

[0010] As a preferred solution of the high-sealability PVC liquid bag described in the utility model, the two ends of the butt joint are cambered.

[0011] As a preferred solution of the high-sealability PVC liquid bag described in the utility model, a reinforcement layer is provided at the inner wall of the opening, the reinforcement layer is bonded to the docking part by glue, and a second adhesive layer is formed between the inner wall of the reinforcement layer and the outer wall of the docking part.

[0012] As a preferred solution of the high-sealability PVC liquid bag described in the utility model, wherein: the reinforcement layer is annular, and the reinforcement layer and the bag body are integrally formed.

[0013] Compared with existing technologies:

[0014] 1. By setting the docking part between the connector and the infusion set to a flat docking part, when the infusion is performed, the opening end of the VC liquid bag faces downward, and when the opening end is squeezed by the gravity of the liquid, the opening end will still maintain its flat shape, so that the opening end is not easy to deform, thereby maintaining a good sealing effect;

[0015] 2. During transportation, the infusion bag is placed flat, and the open end will also be impacted by the liquid. At this time, the open end will still maintain its flat shape, so that the open end is not easy to deform, thereby maintaining a good sealing effect;

[0016] 3. A reinforcement layer is provided at the opening of the infusion bag. The second adhesive layer can more firmly bond the butt joint to the opening of the infusion bag, thereby avoiding rupture at the opening and helping to further improve the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure provided for Example 1 of the utility model;

[0018] Figure 2 Provided for the utility model embodiment 1 Figure 1 A top cross-sectional view of

[0019] Figure 3 Provided for the utility model embodiment 1 Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 A schematic diagram of the structure provided for Embodiment 2 of the present utility model;

[0021] Figure 5 Provided for Example 2 of the utility model Figure 4 A top cross-sectional view of

[0022] Figure 6 Provided for Example 2 of the utility model Figure 5 Enlarged view of point B in the middle.

[0023] In the figure: bag body 1, joint 2, docking portion 21, opening 3, first adhesive layer 4, reinforcement layer 5, second adhesive layer 6. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the implementation methods of the present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Embodiment 1:

[0026] This utility model provides a highly sealed PVC liquid bag, please refer to Figure 1-3 , including a bag body 1, one end of the bag body 1 is provided with an opening 3, the opening 3 is installed with a joint 2, and the end of the joint 2 close to the bag body 1 is provided with a docking portion 21, and the docking portion 21 is flat. Therefore, after the docking portion 21 is bonded to the inner wall of the opening 3, the end of the PVC liquid bag with the opening 3 is still flat as a whole, especially the opening 3 is also flat. At this time, when infusion is performed, the opening 3 end of the VC liquid bag faces downward, and when the opening 3 end is squeezed by the gravity of the liquid, the opening 3 end will still maintain its flat shape, so that the opening end is not easy to deform, thereby maintaining a good sealing effect; for the same reason, when the infusion bag is transported, the infusion bag is laid flat, and at this time the opening 3 end will also be impacted by the liquid. At this time, the opening 3 end will still maintain its flat shape, so that the opening end is not easy to deform, thereby maintaining a good sealing effect.

[0027] If the docking portion 21 is cylindrical, the opening 3 needs to be bent into a circle. Therefore, after the opening 3 is connected to the cylindrical docking portion 21, the end of the opening 3 has a stress that separates it from the docking portion 21. During infusion or transportation, the end of the opening 3 is easily separated from the docking portion 21 under the gravity and impact force of the liquid, resulting in a poor sealing effect.

[0028] The butt joint 21 and the joint 2 are formed as an integral structure, so that the overall structure of the joint 2 is firm.

[0029] The butt joint 21 is bonded to the opening 3 by glue, and a first bonding layer 4 is formed between the outer wall of the butt joint 21 and the inner wall of the opening 3. Both ends of the butt joint 21 are arc-shaped, so that the butt joint 21 and the inner wall of the opening 3 are in better close contact, which helps to connect the butt joint 21 and the inner wall of the opening 3 tightly and ensure the sealing effect.

[0030] In specific use, when performing infusion, the opening 3 ends of the VC liquid bag face downwards, and when the opening 3 ends are squeezed by the gravity of the liquid, the opening 3 ends will still remain flat, so that the opening ends are not easily deformed, thereby maintaining a good sealing effect; for the same reason, when the infusion bag is transported, the infusion bag is placed flat, and at this time, the opening 3 ends will also be impacted by the liquid. At this time, the opening 3 ends will still remain flat, so that the opening ends are not easily deformed, thereby maintaining a good sealing effect.

[0031] Embodiment 2:

[0032] Refer to the attached Figure 4-6 , which is different from Example 1, is that a reinforcement layer 5 is provided at the inner wall of the opening 3, and the reinforcement layer 5 is bonded to the docking part 21 by glue, and a second adhesive layer 6 is formed between the inner wall of the reinforcement layer 5 and the outer wall of the docking part 21, and the reinforcement layer 5 is annular, and the reinforcement layer 5 and the bag body 1 are integrally formed; in the presence of the reinforcement layer 5, the second adhesive layer 6 can bond the docking part 21 and the opening 3 of the infusion bag more firmly, avoiding rupture at the opening 3, which helps to further improve the sealing effect.

[0033] In specific use, when performing infusion, the opening 3 end of the VC liquid bag faces downward, and when the opening 3 end is squeezed by the gravity of the liquid, the opening 3 end will still maintain its flat shape, so that the opening end is not easily deformed, thereby maintaining a good sealing effect; for the same reason, when the infusion bag is transported, the infusion bag is placed flat, and at this time the opening 3 end will also be impacted by the liquid. At this time, the opening 3 end will still maintain its flat shape, so that the opening end is not easily deformed, thereby maintaining a good sealing effect; and in the presence of the reinforcement layer 5, the second adhesive layer 6 can bond the docking portion 21 to the opening 3 of the infusion bag more firmly, avoiding rupture at the opening 3, which helps to further improve the sealing effect.

[0034] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A highly airtight PVC liquid bag, comprising a bag body (1), one end of the bag body (1) being provided with an opening (3), the opening (3) being provided with a joint (2), characterized in that: The end of the joint (2) close to the bag body (1) is provided with a docking portion (21), and the docking portion (21) is flat; The docking portion (21) and the joint (2) are an integrally formed structure; the docking portion (21) is bonded to the opening (3) by glue, and a first bonding layer (4) is formed between the outer wall of the docking portion (21) and the inner wall of the opening (3).

2. The highly airtight PVC liquid bag according to claim 1, characterized in that: Both ends of the butt joint (21) are in the shape of arc surfaces.

3. The highly airtight PVC liquid bag according to claim 2, characterized in that: A reinforcement layer (5) is provided on the inner wall of the opening (3), the reinforcement layer (5) is bonded to the docking portion (21) by glue, and a second adhesive layer (6) is formed between the inner wall of the reinforcement layer (5) and the outer wall of the docking portion (21).

4. The highly airtight PVC liquid bag according to claim 3, characterized in that: The reinforcement layer (5) is annular, and the reinforcement layer (5) and the bag body (1) are integrally formed.

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