A package for ethylene oxide sterilization

Abstract

The utility model discloses a kind of packaging bags for ethylene oxide disinfection, belong to sanitary product and medical instrument packaging technical field, including packaging body, air hole, dialysis patch, gluing layer and article entrance and exit;Air hole is set on packaging body, dialysis patch is covered on air hole by gluing layer, article entrance and exit are set to the edge of packaging body and with air hole area physical isolation.The utility model provides packaging bag for ethylene oxide disinfection, realizes gas exchange in disinfection stage and microbial barrier dual function in storage stage.The working principle used in the utility model is that the microporous structure of dialysis patch realizes gas selective permeation, and gluing layer is used to ensure the firm combination of dialysis patch and packaging body.

Description

Technical Field

[0001] This utility model belongs to the field of packaging technology for hygiene products and medical devices, specifically a packaging bag for ethylene oxide sterilization. Background Technology

[0002] In the production of hygiene products and medical devices, ethylene oxide sterilization is a commonly used sterilization method. Traditional processes employ a "packaging before sterilization" approach, but existing packaging structures have significant drawbacks: firstly, completely sealed aluminized film bags, multi-layer polyethylene composite film bags, and multi-layer polypropylene film bags make it difficult for ethylene oxide gas to permeate, easily leading to incomplete sterilization and long desorption cycles; secondly, packaging with simple ventilation holes cannot effectively prevent the intrusion of environmental pollutants. Existing products on the market generally suffer from unstable sterilization effects and short shelf lives. Although some solutions attempt to use dialysis paper materials, the lack of precise protection and sealing design for the ventilation area leads to issues such as dialysis paper detachment and seal failure during actual use. This invention addresses these technical problems by proposing a packaging bag for ethylene oxide sterilization. Utility Model Content

[0003] To address the above problems, this utility model provides a packaging bag for ethylene oxide sterilization, which solves the contradiction between the ability of traditional hygiene product and medical device packaging bags to simultaneously meet the requirements of breathability for ethylene oxide sterilization and airtightness for long-term preservation.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A packaging bag for ethylene oxide sterilization includes a packaging body, a vent, a dialysis patch, an adhesive layer, and an inlet / outlet for items; the vent is formed on the packaging body, the dialysis patch is covered by the adhesive layer over the vent, and the inlet / outlet for items is located at the edge of the packaging body and is physically isolated from the vent area.

[0006] As a further improvement to the above solution, the diameter of the vent hole is 2mm-100mm.

[0007] As a further improvement to the above solution, the vent holes are formed by laser drilling or mechanical stamping.

[0008] As a further improvement to the above solution, the dialysis patch is circular or square in shape, with a diameter or side length of 10mm-120mm. The dialysis patch can be placed inside or outside the packaging.

[0009] As a further improvement to the above solution, a glue-free area is provided at the contact point between the adhesive layer and the vent hole, and the width of the glue-free area is 2mm-100mm.

[0010] As a further improvement to the above scheme, the dialysis patch has a micropore diameter ≤ 5 μm.

[0011] As a further improvement to the above solution, the packaging body is composed of a single layer or multiple layers of composite materials, such as plastic, aluminized, metal film, paper, and pure metal.

[0012] As a further improvement to the above solution, the packaging body is composed of an outer polypropylene film, a middle layer of aluminized PET film, and an inner polypropylene film.

[0013] As a further improvement to the above solution, the adhesive layer is made of polyurethane hot melt adhesive material.

[0014] As a further improvement to the above solution, the inlet and outlet of the item are sealed using heat sealing, ultrasonic waves, and adhesive coating.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model provides a packaging bag for ethylene oxide sterilization, achieving the dual functions of gas exchange during the sterilization stage and microbial barrier during the storage stage. The working principle of this embodiment is to achieve selective gas permeation through the microporous structure of the dialysis paper, while using an adhesive layer to ensure a firm bond between the dialysis paper and the packaging body.

[0017] 2. Leave a 2mm-100mm un-adhesive area between the adhesive layer and the air vents to prevent the adhesive from clogging the micropores of the dialysis paper and improve gas flow efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention (item entrance / exit closed).

[0019] Figure 2 for Figure 1 A cross-sectional view of the BB plane.

[0020] Figure 3 This is a three-dimensional schematic diagram of the present invention (with the item entrance / exit in the open state).

[0021] Figure 4 This is a three-dimensional schematic diagram of the present invention (showing the dialysis patch).

[0022] Figure 5 for Figure 4 Enlarged diagram of point A in the middle.

[0023] In the diagram: 1. Packaging body; 2. Vent hole; 3. Dialysis patch; 4. Adhesive layer; 5. Item inlet / outlet. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to the embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0025] Example 1

[0026] The packaging body 1 is a three-layer co-extruded composite consisting of an outer 25μm polypropylene printed film, a middle 12μm aluminized PET film, and an inner 25μm polypropylene film. A 5mm diameter vent hole 2 is created on the composite film using a CO2 laser. A 25mm diameter circular dialysis patch 3 is selected, with a micropore size of 0.5μm and a porosity of 50%. The dialysis patch 3 is aligned with the center of the vent hole 2 using a ring-shaped adhesive layer 4 on its back, ensuring that the φ8mm adhesive-free area is directly opposite and completely covers the vent hole 2. The remaining 8.5mm wide annular area is coated with a 0.1mm thick polyurethane hot melt adhesive, forming an adhesive layer 4 with an outer diameter of 25mm and an inner diameter of 8mm. The item inlet / outlet 5 is located at the top of the bag and is pulse-sealed with a width of 6mm. After sterilization, the ethylene oxide residue is ≤10μg / g, and the sterility is maintained for 600 days.

[0027] Example 2

[0028] The packaging body 1 is a three-layer composite consisting of an outer 25μm polypropylene printed film, a middle 30μm aluminum foil, and an inner 25μm polypropylene film. A 10mm diameter vent hole 2 is mechanically punched into the composite film. A 35mm square dialysis patch 3 with a micropore diameter of 0.3μm and a porosity of 55% is selected. The dialysis patch 3 is aligned with the center of the vent hole 2 by the annular adhesive layer 4 on its back, ensuring that the φ12mm adhesive-free area is directly opposite and completely covers the vent hole 2. The remaining 11.5mm wide annular area is coated with 0.2mm thick polyurethane hot melt adhesive, forming an adhesive layer 4 with an outer diameter of 35mm and an inner diameter of 12mm. The item inlet / outlet 5 is located at the top of the bag and is heat-sealed with a flat plate with a width of 8mm. After sterilization, the ethylene oxide residue is ≤10μg / g, and the sterility is maintained within acceptable limits for 600 days.

[0029] Example 3

[0030] The packaging body 1 is composed of two layers of composite material: an outer 40μm polypropylene film and an inner 40μm polypropylene film. A 20mm diameter vent hole 2 is created on the composite film using a CO2 laser. A 60mm diameter circular dialysis patch 3 with a micropore size of 0.4μm and a porosity of 60% is selected. The dialysis patch 3 is attached to the center of the vent hole 2 with its annular adhesive layer 4 on the back side aligned, ensuring that the φ24mm adhesive-free area is directly opposite and completely covers the vent hole 2. The remaining 18mm wide annular area is coated with a 1mm thick polyurethane hot melt adhesive, forming an adhesive layer 4 with an outer diameter of 60mm and an inner diameter of 24mm. The item inlet / outlet 5 is located at the top of the bag, ultrasonically welded to a width of 10mm. After sterilization, the ethylene oxide residue is ≤10μg / g, and the sterility is maintained for 600 days.

[0031] Example 4

[0032] The packaging body 1 is composed of two layers of composite material: an outer 40μm polyethylene film and an inner 40μm polyethylene film. 3mm diameter vent holes 2 are mechanically punched into the films. A 15mm square dialysis patch 3 with a micropore diameter of 0.25μm and a porosity of 45% is selected. The dialysis patch 3 is adhered to the center of the vent hole 2 with its annular adhesive layer 4 on the back, ensuring that the φ5mm adhesive-free area is directly opposite and completely covers the vent hole 2. The remaining 5mm wide annular area is coated with 0.6mm thick polyurethane hot melt adhesive, forming an adhesive layer 4 with an outer diameter of 15mm and an inner diameter of 5mm. The item inlet / outlet 5 is located at the top of the bag and is sealed with a 5mm wide heat-sealing and adhesive-backed composite process. After sterilization, the ethylene oxide residue is ≤10μg / g, and the sterility is maintained within acceptable limits for 600 days.

[0033] It should be noted that, in this document, the terms "comprising," "including," and any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the present invention. These examples are merely for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be pointed out that, due to the limitations of written expression and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or variations without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the concept and technical solution of the present invention to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A packaging bag for ethylene oxide sterilization, characterized in that, It includes a packaging body (1), a vent (2), a dialysis patch (3), an adhesive layer (4), and an item inlet / outlet (5); the vent (2) is opened on the packaging body (1), the dialysis patch (3) is covered on the vent (2) by the adhesive layer (4), and the item inlet / outlet (5) is located at the edge of the packaging body (1) and is physically isolated from the area of ​​the vent (2); The adhesive layer (4) has a ring structure and a non-adhesive area is provided at the contact point with the vent (2), and the non-adhesive area completely covers the vent (2); the packaging body (1) is composed of multiple layers of materials, consisting of an outer polypropylene film, a middle aluminum-plated PET film, and an inner polypropylene film.

2. The packaging bag for ethylene oxide sterilization according to claim 1, characterized in that, The diameter of the vent (2) is 2mm-100mm.

3. A packaging bag for ethylene oxide sterilization according to claim 2, characterized in that, The ventilation holes (2) are formed by laser drilling or mechanical stamping.

4. A packaging bag for ethylene oxide sterilization according to claim 1, characterized in that, The dialysis patch (3) is round or square in shape, with a diameter or side length of 10mm-120mm.

5. A packaging bag for ethylene oxide sterilization according to claim 1, characterized in that, The width of the glue-free area is 2mm-100mm.

6. A packaging bag for ethylene oxide sterilization according to claim 1, characterized in that, The dialysis patch (3) has a micropore diameter of ≤5μm.

7. A packaging bag for ethylene oxide sterilization according to claim 1, characterized in that, The packaging body (1) is made of plastic, aluminum plating, metal film, paper and pure metal.

8. The packaging bag for ethylene oxide sterilization according to claim 1, characterized in that, The coating layer (4) is made of polyurethane hot melt adhesive material.

9. A packaging bag for ethylene oxide sterilization according to claim 1, characterized in that, The item entrance / exit (5) is sealed using heat sealing, ultrasonic welding, and adhesive coating processes.

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