Medical liquid preparation packaging bag with sealing strip structure

Abstract

The utility model relates to a medical liquid preparation packaging bag with a sealing strip structure. Comprising three heat sealing edges, a clamping chain, an easy-to-tear opening and a bag wall and further comprises a sealing strip, the sealing strip is arranged above the clamping chain, the sealing strip structurally comprises a polyethylene film layer, a nylon film layer and a bonding layer for fixedly bonding the polyethylene film layer and the nylon film layer, a polyethylene thin layer is arranged on the outer side of the nylon film layer, the polyethylene film layer is fixedly bonded with the inner wall of the bag wall on one side, and the sealing strip is arranged on the outer side of the nylon film layer. The polyethylene thin layer is fixedly bonded with the inner wall of the bag wall on the other side, and the thickness of the polyethylene thin layer is far smaller than that of the polyethylene film layer on the sealing strip. The two sides of the additionally arranged sealing strip have heat sealability, but due to the fact that the thicknesses of the heat sealability materials on the two sides are obviously different, the thin spraying film side of the heat sealability materials can achieve the heat sealing and complete anti-seepage effects, and the other side of the heat sealability materials has lower heat sealing strength. And the required force value during opening is relatively low.

Description

Technical Field

[0001] The utility model relates to the technical field of medical preparation packaging bag processing, in particular to a medical liquid preparation packaging bag with a sealing strip structure. Background Art

[0002] Medical preparation packaging bags are one of the common packaging forms in the medical field. Compared with bottled or canned packaging, bag packaging often has lower costs and higher cost-effectiveness while also meeting the physical and mechanical properties and barrier properties required by the packaging materials. Therefore, the share of medical preparation packaging bags in the entire packaging market is also expanding. Continuous research and improvement of them is also one of the important topics in the field of packaging technology.

[0003] The bag walls of traditional medical preparation packaging bags are often made of "composite materials". The so-called "composite materials" refer to materials obtained by bonding and laminating two or more films of different properties with adhesives. Such materials often have the characteristics and advantages of various base films, so as to better meet packaging needs.

[0004] Traditional medical preparation packaging bag styles are as follows Figure 1 As shown in the figure, it consists of a bag wall, three heat-sealed edges, a zipper and an easy-tear opening. The top of the bag is open, and the medical preparation manufacturer can seal the bag after filling the contents before leaving the factory. The addition of the zipper can meet the need for repeated opening and closing of the bag after tearing the easy-tear opening. The typical composite material used for the bag wall of medical preparation packaging bags is often composed of an outer nylon film layer and an inner polyethylene film layer, and also includes a glue layer that can play a bonding role. The nylon film layer can provide the main barrier properties required for packaging, and the polyethylene film layer can provide the heat sealing properties required for bag making.

[0005] The above-mentioned traditional medical preparation packaging bags can usually meet the actual use needs when the packaging contents are solid or powder, but when the packaging contents are liquid preparations, they often have the following disadvantages:

[0006] 1. Since it is difficult for the zipper to be completely impermeable to liquids, the liquid preparations in the package often seep through the zipper to the area at the easy-tear opening at the bottom of the zipper. Medical liquid preparations (such as biological buffer solutions, dye solutions, etc.) often have certain acidity, alkalinity or irritation. When the bag is torn open from the easy-tear opening in actual use, the seeped liquid preparations often directly stain or splash onto the user's skin or body, which at best brings a bad user experience and at worst erodes the user's skin.

[0007] Second, since the thickness of the zipper is much thicker than that of the composite material, the sealing edges on both sides of the zipper often leak when making bags. Once this happens, the liquid preparation in the package will leak out of the package, causing mutual contamination of the products or contamination of the outer packaging box, resulting in quality accidents. Summary of the invention

[0008] In order to solve the above technical problems, the main purpose of the utility model is to provide a medical liquid preparation packaging bag with a special sealing strip structure to overcome the defects of traditional bags that are easy to leak after containing liquid preparations or easy to stain the skin during use, thereby achieving the purpose of improving the sealing integrity and safety performance of the product and enhancing the customer experience.

[0009] A medical liquid preparation packaging bag with a sealing strip structure comprises three heat-sealed edges, a zipper, an easy-tear opening and a bag wall, and also comprises a sealing strip, wherein the sealing strip is arranged above the zipper, and the sealing strip structure comprises a polyethylene film layer, a nylon film layer, and an adhesive layer for fixing and bonding the polyethylene film layer and the nylon film layer, a polyethylene thin layer is arranged on the outer side of the nylon film layer, the polyethylene film layer is fixedly bonded to the inner wall of the bag wall on one side, and the polyethylene thin layer is fixedly bonded to the inner wall of the bag wall on the other side, and the thickness of the polyethylene thin layer is much lower than the thickness of the polyethylene film layer on the sealing strip.

[0010] The polyethylene thin layer is arranged on the outer side of the nylon film layer by laminating.

[0011] The polyethylene film layer is fixedly bonded to the inner wall of the bag wall on one side by heat sealing, and the polyethylene thin layer is fixedly bonded to the inner wall of the bag wall on the other side by heat sealing.

[0012] The bag wall has a structure of an outer nylon film layer and an inner polyethylene film layer, and the outer layer and the inner layer are fixedly connected by gluing.

[0013] The width of the sealing strip is between 8 and 12 mm.

[0014] The thickness of the polyethylene thin layer is between 10 and 20 microns.

[0015] The thickness of the nylon membrane layer is between 15 and 25 microns.

[0016] The thickness of the polyethylene film layer is between 60 and 90 microns.

[0017] Compared with the prior art, the utility model can bring the following beneficial effects:

[0018] 1) Both sides of the sealing strip added by the utility model are heat-sealable, but due to the significant difference in thickness of the heat-sealable materials on both sides, the side with the relatively thinner film of the heat-sealable material can achieve the effect of heat sealing and complete impermeability, and has a lower heat-seal strength than the other side, and the force required for opening is lower. Therefore, after the user actually uses the package to open the zipper, it is also easier to open the sealing strip; 2) The utility model is provided with a special sealing strip structure, and the sealing strip is hot-sealed inside the bag and is sealed with the inner walls on both sides. Tightly melt-sealed, so when containing liquid medical preparations, the liquid inside the bag will be completely prevented from contacting the zipper, thus overcoming the defect that leakage often occurs at the heat-sealed edges on the left and right sides of the zipper of traditional medical preparation packaging bags; 3) Since the utility model is provided with a special sealing strip structure, even if liquid medical preparations are contained, no liquid will appear in the internal space of the easy-tear portion below the zipper of the bag, thus overcoming the defect that when customers use traditional medical preparation packaging bags to open the easy-tear portion, the zipper exudate is easily stained or splashed onto the user's skin or body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a traditional medical preparation packaging bag style diagram;

[0020] Figure 2 It is a structural diagram of the utility model;

[0021] Figure 3 The structural diagram of the sealing strip is shown in Figure 2.

[0022] In the figure: 1. heat-sealed edge, 2. zipper, 3. easy-tear edge, 4. bag wall, 5. sealing strip, 6. polyethylene film layer, 7. nylon film layer, 8. adhesive layer, 9. polyethylene thin layer. DETAILED DESCRIPTION

[0023] like Figure 2-3 As shown, a medical liquid preparation packaging bag with a sealing strip structure includes three heat-sealed edges 1, a zipper 2, an easy-tear edge 3 and a bag wall 4, and also includes a sealing strip 5. The sealing strip 5 is arranged above the zipper 2. The sealing strip 5 structure includes a polyethylene film layer 6, a nylon film layer 7, and an adhesive layer 8 for fixing the polyethylene film layer 6 and the nylon film layer 7. A polyethylene thin layer 9 is provided on the outer side of the nylon film layer. The polyethylene film layer 6 is fixedly bonded to the inner wall of the bag wall 4 on one side, and the polyethylene thin layer 9 is fixedly bonded to the inner wall of the bag wall 4 on the other side. The thickness of the polyethylene thin layer 9 is much lower than the thickness of the polyethylene film layer 6 on the sealing strip.

[0024] The polyethylene thin layer 9 is disposed on the outer side of the nylon film layer 7 by lamination.

[0025] The polyethylene film layer 6 is fixedly bonded to the inner wall of the bag wall 4 on one side by heat sealing, and the polyethylene thin layer 9 is fixedly bonded to the inner wall of the bag wall 4 on the other side by heat sealing.

[0026] The bag wall has a structure of an outer nylon film layer and an inner polyethylene film layer, and the outer layer and the inner layer are fixedly connected by gluing.

[0027] The width of the sealing strip 5 is 8 mm.

[0028] The thickness of the polyethylene thin layer 9 is 10 microns.

[0029] The thickness of the nylon membrane layer 7 is 20 microns.

[0030] The thickness of the polyethylene film layer 6 is 80 microns.

Claims

1. A medical liquid preparation packaging bag with a sealing strip structure, comprising three heat-sealed edges, a zipper, an easy-tear opening and a bag wall, characterized in that: It also includes a sealing strip, which is arranged above the zipper. The sealing strip structure includes a polyethylene film layer, a nylon film layer, and a bonding layer that fixes the polyethylene film layer and the nylon film layer. A polyethylene thin layer is provided on the outer side of the nylon film layer. The polyethylene film layer is fixedly bonded to the inner wall of the bag wall on one side, and the polyethylene thin layer is fixedly bonded to the inner wall of the bag wall on the other side. The thickness of the polyethylene thin layer is much lower than the thickness of the polyethylene film layer on the sealing strip.

2. A medical liquid preparation packaging bag with a sealing strip structure as claimed in claim 1, characterized in that: The polyethylene thin layer is arranged on the outer side of the nylon film layer by laminating.

3. A medical liquid preparation packaging bag with a sealing strip structure as claimed in claim 1, characterized in that: The polyethylene film layer is fixedly bonded to the inner wall of the bag wall on one side by heat sealing, and the polyethylene thin layer is fixedly bonded to the inner wall of the bag wall on the other side by heat sealing.

4. A medical liquid preparation packaging bag with a sealing strip structure as claimed in claim 1, characterized in that: The bag wall has a structure of an outer nylon film layer and an inner polyethylene film layer, and the outer layer and the inner layer are fixedly connected by gluing.

5. A medical liquid preparation packaging bag with a sealing strip structure as claimed in claim 1, characterized in that: The width of the sealing strip is between 8 and 12 mm.

6. A medical liquid preparation packaging bag with a sealing strip structure as claimed in claim 1, characterized in that: The thickness of the polyethylene thin layer is between 10 and 20 microns.

7. A medical liquid preparation packaging bag with a sealing strip structure as claimed in claim 1, characterized in that: The thickness of the polyethylene film layer is between 60 and 90 microns.

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