Medical aseptic cotton piece

Abstract

The invention belongs to the field of medical supplies, and particularly relates to a medical disinfection cotton piece. The aseptic cotton piece comprises a packaging bag and a cotton piece body contained in the packaging bag in a sealed mode, the packaging bag is made of deformable springback materials, a tearing indentation and a notch are formed in the top of the packaging bag, after the packaging bag is torn, a bag opening can be automatically and stably opened by extruding the two sides of a bag body, and a non-contact taking channel is formed. The cotton piece is in a fingerstall shape, a folded shape or a double-piece independent fixing structure, is connected with the inner wall of the packaging bag, forms a disinfection space after being unfolded, can stably wrap medical instruments such as a catheter connector and the like, and prevents slippage and displacement. The main body layer of the packaging bag can be made of PET, kraft paper or PE, the barrier layer is made of aluminum foil or EVOH, and the packaging bag has the advantages of high rebound resilience, high barrier property and low cost. The device effectively avoids hand pollution, improves the stability and efficiency of disinfection operation, and is suitable for clinical disinfection scenes of interfaces of central venous catheters, hemodialysis catheters and the like.

Description

Technical Field

[0001] The present invention relates to medical supplies, and more particularly to a medical disinfection cotton pad. Background Art

[0002] In clinical medical operations, disinfection of invasive medical device interfaces is a key step in preventing infection. According to relevant operating standards, such interfaces require continuous mechanical friction disinfection using disinfectant cotton pads containing a specific concentration of ethanol. However, existing disinfectant cotton pads have many problems in practical applications. Traditional alcohol cotton pads are packaged in a fully sealed package, and medical staff need to tear open the package and use the cotton pads directly with their hands, which can easily lead to contamination of the cotton pads with hand microorganisms. Especially in high-pressure medical environments, when compliance with aseptic hand operations decreases, the risk of contamination will increase significantly.

[0003] During the disinfection process, medical devices such as central venous catheters require a certain amount of pressure and multi-directional friction. However, ordinary cotton pads lack a support structure and are prone to wrinkling and shifting when force is applied, resulting in a reduced effective contact area. Furthermore, the low coefficient of friction between the damp cotton pad and the gloves makes it easy for the pad to slip during the procedure, which not only interrupts the disinfection process but may also require repeated procedures.

[0004] The main defects of existing alcohol cotton pads are manifested in several aspects: first, after tearing the seal, you need to put your fingers into the bag to take out the cotton pad, which is very easy to contaminate the working surface of the cotton pad; second, ordinary cotton pads are simple flat sheet structures and lack effective grip auxiliary structures, which are easy to slip or fall off when force is applied; third, traditional packaging bags lack deformation resilience, and the bag opening will close automatically after tearing, making contactless access impossible.

[0005] In specific application scenarios, such as hemodialysis catheter care, a cotton pad needs to be able to completely wrap and rotate to wipe the catheter interface containing threaded recesses. However, because existing cotton pads cannot be firmly fixed on the fingers, the grip position often needs to be adjusted multiple times during operation, which prolongs the exposure time. Another example is when disinfecting needleless infusion connectors, where the connector diameter is small, a cotton pad may fall off, allowing disinfectant to seep into the connector and cause equipment corrosion.

[0006] While some products have emerged on the market to attempt optimization, such as cotton pad sets with attached plastic tweezers, these solutions fail to fundamentally address the problem. The additional tools require separate sterilization, and the tweezers can cause pressure, accelerating the evaporation of the alcohol. Furthermore, these solutions increase costs, violating the principle of low-cost medical consumables. Furthermore, the packaging bag cannot be opened automatically after being squeezed.

[0007] In view of the above problems, the existing technology is in urgent need of improvement. Summary of the Invention

[0008] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a medical disinfection cotton pad and its packaging structure, which has the advantages of avoiding contamination caused by direct contact of the hands with the cotton pad, keeping the bag opening stably open for contactless use, and providing a disinfection space support structure to prevent the cotton pad from shifting and slipping.

[0009] A medical disinfection cotton pad comprises a packaging bag and a cotton pad, wherein the cotton pad is sealed and stored in the packaging bag. The invention is characterized in that the packaging bag is made of a deformable and resilient material, the cotton pad has a disinfection space, the entrance of the disinfection space corresponds to the bag opening of the packaging bag, and after the packaging bag is torn open, the bag opening can be opened by squeezing both sides of the packaging, and the entrance of the disinfection space can be opened along with the bag opening.

[0010] Furthermore, both sides of the packaging bag have inwardly recessed folding portions, which are used to open the bag opening.

[0011] Furthermore, the bottom of the packaging bag has an inwardly recessed folding portion, which is used to open the bag opening.

[0012] Furthermore, elastic strips are provided on both sides of the bag opening of the packaging bag, and the elastic strips are used to support and open the bag opening.

[0013] Furthermore, the packaging bag has a V-shaped or inverted eight-shaped fold corresponding to the bag opening.

[0014] Furthermore, the top of the packaging bag has corresponding tear indentations and tear notches, and the tear indentations and tear notches are both located above the elastic strip.

[0015] Furthermore, the cotton piece is in the shape of a fingertip, and two side surfaces of the cotton piece are respectively connected to the inner wall of the packaging bag.

[0016] Furthermore, the cotton sheet is folded in half, and the two folded surfaces of the cotton sheet are respectively connected to the inner sides of the packaging bag.

[0017] Furthermore, the cotton sheet has two pieces and is respectively connected to the inner wall of the packaging bag.

[0018] Furthermore, the packaging bag includes a main layer and a barrier layer, the main layer is made of kraft paper, PE or PET material, and the barrier layer is made of aluminum foil or EVOH material.

[0019] By adopting the above technical solution, the beneficial effects of the present invention are: 1. Achieve contactless access, significantly reducing contamination risks: This application utilizes a deformable, resilient material and a linkage structure design, allowing the bag opening to automatically and stably open after the packaging bag is torn open by squeezing the two sides of the bag, creating a contactless access channel. This design completely eliminates direct contact between medical staff and the cotton pad working surface, effectively preventing the risk of cross-infection caused by hand microbial contamination. It is particularly suitable for aseptic operations in high-pressure medical scenarios.

[0020] 2. Improve operational stability and prevent cotton pads from slipping and shifting: The cotton pads are secured in a fingertip-shaped, folded-in-half, or double-piece configuration to form a support frame for the sterilization space within the packaging bag. When the bag is opened, the fixed connection between the cotton pads and the inner wall of the packaging bag allows them to unfold synchronously, forming a stable, wrapped contact surface. This structure significantly increases the effective contact area between the cotton pads and the instrument surface, and through multi-point support and distributed force, it completely eliminates the problem of disinfection interruptions caused by wrinkling and slipping of traditional cotton pads, ensuring complete wiping of complex interfaces such as catheter threads and needleless connectors.

[0021] 3. Optimizing material and structural synergy to balance performance and cost: Utilizing a PET / aluminum foil (or EVOH) composite material, the main layer provides high-strength deformation resilience, while the barrier layer achieves zero ethanol volatility and zero microbial penetration, extending the shelf life of the cotton pad. Furthermore, the geometric design of the elastic strip and V-shaped folds ensures a stable opening angle, enabling single-handed operation and reducing handling time. Craft paper or PE materials are available, respectively meeting environmental degradation requirements and high-frequency use scenarios, thereby reducing costs.

[0022] 4. Adapt to complex clinical scenarios and improve disinfection efficiency: The finger-shaped cotton pad tightly wraps around the catheter interface and rotates to wipe the thread depression. The folded structure enhances the grip of tiny connectors, and the dual-pad design enables simultaneous disinfection of both sides. For example, in hemodialysis catheter care, the cotton pad can complete 360° wrapping and disinfection in one go, shortening the operation time. When disinfecting needle-free infusion connectors, the folded structure prevents disinfectant from seeping into the connection port, reducing the risk of equipment corrosion.

[0023] 5. Reduce the burden of medical waste disposal: The optional kraft paper main layer and EVOH barrier layer combination achieves fully biodegradable packaging, which meets environmental medical standards; the bending resistance of the PE material reduces the packaging breakage rate and reduces the frequency of use of sharps boxes.

[0024] To sum up, this application adopts the linkage design of the packaging bag made of deformable resilient material and the entrance of the disinfection space. After tearing open the package, the bag opening is kept open by squeezing, thereby realizing non-contact removal of cotton pads. At the same time, the support structure of the disinfection space ensures that the cotton pads are stably attached to the surface of the instrument during operation, which has the advantages of avoiding hand contamination, preventing the cotton pads from slipping, and improving the efficiency of the disinfection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of Example 1.

[0026] Figure 2 This is a schematic cross-sectional view of the first embodiment.

[0027] Figure 3 This is a structural diagram of Example 2.

[0028] Figure 4 This is a schematic cross-sectional view of the second embodiment.

[0029] Figure 5 This is a structural diagram of Example 3.

[0030] Figure 6 This is a schematic cross-sectional view of the structure of Example 3 when a folded cotton sheet is used.

[0031] Figure 7 Schematic diagram of the fingertip-shaped cotton cloth structure.

[0032] Figure 8 This is a schematic cross-sectional view of the structure of the third embodiment using two cotton sheets.

[0033] Figure 9 Schematic diagram of the cross-sectional structure of the packaging bag material.

[0034] Reference numerals: packaging bag 1 , cotton sheet 2 , elastic strip 3 , V-shaped fold 4 , tear indentation 5 , tear notch 6 , main layer 11 , barrier layer 12 , folded portion 13 , bag opening 101 , disinfection space 201 . DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0037] A medical disinfection cotton pad includes a packaging bag 1 and a cotton pad 2. The cotton pad 2 is sealed within the packaging bag 1, which is made of a deformable and resilient material. The cotton pad 2 defines a disinfection space 201, the entrance of which corresponds to the bag opening 101 of the packaging bag 1. After the packaging bag 1 is torn open, the bag opening 101 can be opened by squeezing the sides of the packaging, and the entrance of the disinfection space 201 can also open along with the bag opening 101. A solution containing 2% chlorhexidine and 70% ethanol by mass, or a solution containing 75% alcohol, is added to the cotton pad 2.

[0038] Among them, the deformable resilient material is a material that can return to its original shape after elastic deformation under the action of an external force. Specifically, it can be realized by using a composite material of PET and elastomer. This material enables the packaging bag 1 to automatically open to form an operating channel after being squeezed. The disinfection space 201 is a cavity structure formed by the cotton sheet 2 to accommodate the disinfection object. Specifically, it can be realized by a fingertip-shaped or folded cotton sheet 2 structure, which enables the cotton sheet 2 to wrap around the disinfection area to prevent slipping. The entrance corresponds to the bag opening 101, and the opening direction of the disinfection space 201 is consistent with the opening direction of the packaging bag 1. Specifically, this can be achieved by adjusting the fixed position of the cotton sheet 2 and the inner wall of the packaging bag 1. This setting ensures that the entrance of the disinfection space 201 is simultaneously expanded when the bag opening 101 is opened.

[0039] Specifically, after being torn open, the packaging bag 1 undergoes elastic deformation through squeezing on both sides, and the bag opening 101 remains open due to the material's rebound force, forming a contactless access channel. The entrance to the disinfection space 201 of the cotton pad 2 is arranged corresponding to the bag opening 101. When the bag opening 101 is opened, the entrance size is simultaneously expanded to facilitate the entry of the disinfected object into the space during operation. The cotton pad 2 wraps the disinfection area through a spatial structure, forming multiple points of contact during the wiping process, avoiding slippage caused by insufficient friction coefficient. The elastic properties of the packaging material and the spatial structure of the cotton pad 2 form a linkage mechanism, achieving operational stability while maintaining sealing.

[0040] The packaging bag 1 comprises a main body layer 11 and a barrier layer 12. The main body layer 11 is made of PET, and the barrier layer 12 is made of aluminum foil. The main body layer 11 is the primary structural support layer of the packaging bag 1 and can be made of polyethylene terephthalate (PET). It possesses high mechanical strength and deformation resilience, allowing it to return to its original shape after being squeezed, ensuring that the bag opening 101 can be opened repeatedly. The barrier layer 12 is the sealing and protective layer of the packaging bag 1 and can be made of aluminum foil. It is highly dense and chemically inert, effectively blocking the penetration of external moisture, oxygen, and microorganisms, while also preventing the volatilization of the internal disinfectant.

[0041] Specifically, the main layer 11 leverages the rigidity of PET material to provide structural support for the packaging bag 1, maintaining its shape during squeezing and preventing rupture due to applied force. The barrier layer 12, through the dense structure of aluminum foil, forms a physical barrier, preventing environmental factors from affecting the disinfectant components of the cotton pad 2. This composite structure maintains the packaging bag 1's deformable function while protecting the internal cotton pad 2 from contamination during storage.

[0042] Example 1:

[0043] like Figure 1 and Figure 2As shown, the packaging bag 1 can be composed of one or two rectangular pieces of material. The two sides of the packaging bag 1 are folded inward to form a pair of inwardly concave folded portions 13. The two ends of the rectangle are bonded and sealed together, thus forming a cylindrical bag body. The bottom end of the cylindrical bag body is first heat-sealed to form a bottom seal. A cotton pad soaked in disinfectant (2% chlorhexidine + 70% ethanol, or 75% alcohol) is placed into the bag body in a fingertip-shaped, folded-in-half-shaped, or two-piece independent fixed structure. The left and right sides are fixed to the inner wall of the packaging bag using point-shaped hot melt adhesive or ultrasonic welding to ensure that the entrance of the cotton pad's disinfection space is directly opposite the bag opening. Subsequently, the top of the cylindrical bag body is heat-sealed to form a top seal, completing the sealed storage of the cotton pad. The top of the packaging bag 1 is provided with a tear indentation 5 and a tear notch 6. The tear indentation 5 is inclined. The packaging bag 1 is also provided with an auxiliary inverted figure-eight fold.

[0044] When the top seal of the packaging bag 1 is torn open via the preset tear marks 5 and tear notches 6, the folded portion 13 expands outward due to the deformation and rebound properties of the material (the main layer is made of PET, kraft paper, or PE, and the barrier layer is made of aluminum foil or EVOH), causing the bag opening to automatically and stably open, forming a contactless access channel. The inclined tear marks avoid the top seal of the packaging bag 1, ensuring that the packaging bag 1 can be torn open. During the bag opening process, the cotton sheet, through its fixed connection with the inner wall of the packaging bag, simultaneously expands and forms a disinfection space, facilitating direct entry and wrapping of medical device interfaces for disinfection, avoiding the problem of traditional cotton sheets easily slipping and shifting. The gradually expanding structure of the inverted eight-shaped fold generates a reverse restraining force during the material rebound process, maintaining the bag opening in an open state.

[0045] Example 2:

[0046] like Figure 3 and Figure 4 As shown, the packaging bag is made of a rectangular piece of material that is folded into a W shape, forming an inwardly concave and raised folded portion 13. The two sides of the packaging bag are then sealed using a heat-melting or ultrasonic welding process. Finally, a cotton pad is placed into the packaging bag and the top of the bag is sealed, ultimately forming a medical sterilization pad. Alternatively, the packaging bag can be made of three sheets of material forming the bag body and the support portion, which are then bonded and sealed.

[0047] Once the top of the packaging bag 1 is torn open, the bag opening 101 opens due to the elastic material. The operator then inserts their fingers into the bottom of the bag to prop open the folded portion 13, and then presses on both sides of the bag 1, further opening the bag opening and creating a contactless access channel. During this opening process, the cotton pad, through its fixed connection to the inner wall of the packaging bag, simultaneously unfolds and forms a disinfection space, facilitating direct entry and sterilization of medical device interfaces, avoiding the slippage and displacement issues of traditional cotton pads.

[0048] Example 3:

[0049] like Figure 5 、 Figure 6 and Figure 8 As shown, the packaging bag is made of two pieces of rectangular material, and the four edges of the packaging bag are bonded and sealed. Elastic strips 3 are provided on both sides of the bag opening 101 of the packaging bag 1, and the elastic strips 3 are used to support and open the bag opening 101. Among them, the elastic strip 3 is a strip structure with deformation rebound ability, which can be specifically realized by silicone or thermoplastic polyurethane material, and its elastic modulus range can be controlled between 0.5-3MPa. The elastic strip 3 is fixed to the edge of the bag opening 101 of the packaging bag 1 through a pre-pressing process. Among them, the two sides of the bag opening 101 are two symmetrical areas along the length direction of the open end of the packaging bag 1. Specifically, ultrasonic welding or gluing process can be used to fix the elastic strip 3 at a distance from the edge of the bag opening 101. This arrangement ensures that the elastic strip 3 produces symmetrical elastic deformation when the packaging bag 1 is squeezed, forming a stable opening angle of the bag opening 101.

[0050] Specifically, after the packaging bag 1 is torn open, to access the cotton sheet 2, the user squeezes the outer walls of the packaging bag 1 with their fingers, causing the elastic strips 3 to bend and deform, further expanding the bag opening 101 to form an access channel. During this process, the bilaterally symmetrical structure of the elastic strips 3 provides stable mechanical support, providing contactless access to the working surface of the cotton sheet 2.

[0051] Furthermore, the elastic strip 3 can be secured to the edge of the bag opening 101 through a pre-compression process. After the bag opening 101 is torn, the material's own resilience maintains the bag opening 101 open. Specifically, after the bag 1 is torn, the pre-compression of the elastic strip 3 is released, and its resilience drives the bag opening 101 outward. To access the cotton pads 2, the outer walls of the bag 1 are squeezed with fingers, causing the elastic strip 3 to bend and deform, further expanding the bag opening 101 to form an access channel. After the external force is removed, the residual resilience of the elastic strip 3 maintains the bag opening 101 open, preventing it from spontaneously closing.

[0052] The packaging bag 1 has a V-shaped or inverted figure-eight fold that corresponds to the bag opening 101. The V-shaped fold 4 is a downward-pointing geometric guide formed by two fold lines intersecting at a preset angle. This can be achieved by forming a weakened line on the surface of the packaging bag 1 through an indentation process. This structure produces directional deformation during compression packaging. The inverted figure-eight fold is a non-parallel structure with two fold lines symmetrically spaced and a greater distance between the upper ends than the lower ends. This can be produced through a hot pressing process. Its spatial arrangement enhances the support stiffness of the edge of the bag opening 101.

[0053] Specifically, when the sides of the packaging bag 1 are squeezed, the crease area creates a stress concentration zone due to the material thickness difference, guiding the packaging material to unfold along a predetermined path. The tip of the V-shaped crease 4 deforms preferentially, causing the two sides of the bag opening 101 to flip outward to form an open channel. The gradually expanding structure of the inverted figure-eight crease generates a reverse restraining force during the material's rebound, maintaining the bag opening 101 open. Both crease configurations control deformation direction through geometric configuration, ensuring that the bag opening 101 maintains a stable opening angle even after the external force is removed, avoiding the phenomenon of bag opening 101 closing due to stress dispersion that occurs with traditional straight creases.

[0054] The top of the packaging bag 1 has a corresponding tear mark 5 and tear notch 6, both located above the elastic strip 3. The tear mark 5 is a pre-formed linear weakening structure on the top of the packaging bag 1, which can be achieved through laser scribing or mechanical indentation, and serves to guide the tearing action along a predetermined path. The tear notch 6 is an initial opening provided at the top edge of the packaging bag 1, which can be achieved through punching or die-cutting, and serves to provide the initial point of application of the tearing force.

[0055] Specifically, the tear mark 5 acts as a stress concentration line, preferentially breaking during the tearing process, causing the packaging bag 1 to tear along a straight path and preventing the bag opening 101 from closing due to irregular tearing. The tear notch 6, serving as the starting point for force application, forms a spatial correspondence with the tear mark 5, ensuring that the operator can precisely control the tearing direction. This structure, positioned above the elastic strip 3, ensures that the torn bag opening 101 area is directly within the elastic support range of the elastic strip 3. The tearing path and the bag opening 101 support structure work synergistically to achieve contactless access.

[0056] like Figure 7 As shown, the cotton sheet 2 is finger-shaped, with its two side surfaces connected to the inner wall of the packaging bag 1. The finger-shaped structure refers to the cotton sheet 2 being formed into a cylindrical structure with an open end. Specifically, a hot pressing process can be used to process a non-woven fabric into a hollow structure that fits the end of the medical device. This structure can wrap around the surface of the object being operated on, achieving multi-angle contact. The two side surfaces are connected to the inner wall of the packaging bag 1 by fixing the left and right edges of the cotton sheet 2 to the inner wall of the packaging bag 1 via adhesive or hot melt. Specifically, this can be achieved through a point-type gluing process. This connection method ensures that the deformation of the packaging bag 1 causes the cotton sheet 2 to unfold synchronously.

[0057] Specifically, when the packaging bag 1 is squeezed, the bag opening 101 opens due to the elastic material. This creates traction at the connection between the two sides of the cotton pad 2 and the inner wall of the packaging bag 1, causing the finger-shaped cotton pad 2 to unfold along the direction of the bag opening 101, forming an operating channel. The operator can directly insert the medical device into the finger-shaped pad without touching the working surface of the cotton pad 2, and complete the wiping and disinfection through the contact surface between the inner wall of the cotton pad 2 and the object being operated. During this process, the fixed connection between the cotton pad 2 and the packaging bag 1 ensures that the cotton pad 2 maintains a stable shape after unfolding, preventing displacement or dislodging during operation.

[0058] like Figure 6 As shown, the cotton sheet 2 is folded in half, with the two folded surfaces of the cotton sheet 2 respectively connected to the inner side of the packaging bag 1. The folded shape refers to the cotton sheet 2 being folded along its longitudinal midline to form a double-layered structure. Specifically, a hot press forming process can be used to shape the fold line. This configuration allows the cotton sheet 2 to form a self-supporting frame when subjected to stress, preventing wrinkles and deformation in a single-layer material. The two folded surfaces are respectively connected to the inner side of the packaging bag 1 by bonding or heat-sealing the two outer side surfaces of the folded cotton sheet 2 to the inner wall of the packaging bag 1. Specifically, this can be achieved using a hot melt adhesive matrix or ultrasonic welding process. This connection method ensures that the cotton sheet 2 maintains a symmetrical stress state when the packaging bag 1 is squeezed and deformed, preventing deflection during operation.

[0059] Specifically, when the packaging bag 1 is squeezed and opened, the simultaneous expansion of the inner walls on both sides drives the folded surface to unfold, forming a stable unfolded plane. The V-shaped clamping space created by the folded structure encloses the medical device interface during sterilization. The enhanced rigidity at the fold line ensures that the cotton pad 2 maintains a flat contact state when vertical pressure is applied. The symmetrical connection on both sides provides two fixed supports for the cotton pad 2 within the packaging bag 1. During operation, external forces are evenly transmitted to both sides of the cotton pad 2 through the side walls of the packaging bag 1, avoiding stress concentration and material tearing caused by one-sided connection.

[0060] like Figure 8 As shown, the two cotton sheets 2 are each connected to the inner wall of the packaging bag 1. These two cotton sheets 2 form two independently provided disinfectant material units. Specifically, they can be made by impregnating non-woven fabric with disinfectant and then cutting it into symmetrical shapes. The separate structure forms a double-sided clamping surface during operation. The two cotton sheets 2 are each fixed to corresponding positions on the inner wall of the packaging bag 1. This can be achieved by hot pressing or dot-coating with medical glue. The independent bilateral fixation creates a force-balanced structure.

[0061] Specifically, when the packaging bag 1 is squeezed, causing the bag opening 101 to open, the two cotton pads 2 simultaneously separate as the inner wall of the packaging bag 1 expands, forming disinfection work surfaces symmetrically distributed on both sides of the bag opening 101. During the wiping process, the two cotton pads 2 are independently supported and frictionally applied by the inner wall of the packaging bag 1, preventing displacement or wrinkling caused by unilateral force. For example, when a catheter interface is inserted between the two cotton pads 2, the deformation and rebound force of the inner wall of the packaging bag 1 ensures that the two cotton pads 2 continue to adhere to the surface of the instrument, forming a stable, wrap-around disinfection contact.

[0062] The main body layer 11 can also be made of kraft paper or polyethylene (PE). Kraft paper is a paper material processed from natural fibers. Its interwoven fiber structure can moderately deform and recover when compressed. PE is a polyethylene polymer material, specifically low-density polyethylene (LDPE) or linear low-density polyethylene (LLDPE). The flexibility of its molecular chains allows the material to quickly rebound after being compressed.

[0063] Specifically, when kraft paper is used for the main layer 11 of the packaging bag 1, the packaging bag 1 can produce controllable deformation when squeezed by fingers through the sliding and hydrogen bonding between the fibers. When the external force is removed, the bag opening 101 is restored to a closed state by the elasticity of the fibers. This characteristic can ensure that the bag opening 101 opens the operating channel while reducing material costs in conventional disinfection scenarios that require moderate rebound force. When PE material is used, the free rotation characteristics of its molecular chain segments enable the packaging bag 1 to maintain stable rebound performance during repeated squeezing, ensuring that the bag opening 101 can be reliably opened with each operation. The use of these two materials expands the applicable scenarios of the packaging bag 1 and meets different strength requirements through the physical properties of the materials themselves.

[0064] In some specific embodiments, the kraft paper can be impregnated to improve its moisture resistance, for example, by coating the surface with food-grade paraffin wax; the PE material can optionally be added with antistatic masterbatch to avoid electrostatic adsorption between the cotton sheet 2 and the inner wall of the packaging bag 1.

[0065] The barrier layer 12 can also be made of EVOH. EVOH is an ethylene-vinyl alcohol copolymer, specifically achieved by adjusting the copolymerization ratio of ethylene to vinyl alcohol. The high polarity of the vinyl alcohol structural unit in its molecular chain provides a barrier to water vapor, organic solvents, and microorganisms. This material forms a stable composite structure with the main body layer 11 during the extrusion deformation process of the packaging bag 1, preventing delamination or rupture due to differences in material rigidity.

[0066] Specifically, EVOH is co-extruded with the main layer 11 to form a continuous, dense barrier layer 12. When the packaging bag 1 is sealed, EVOH's high crystallinity prevents ethanol molecules from permeating and escaping, maintaining the moistness of the cotton sheet 2. During extrusion of the packaging bag 1, EVOH's ductility allows it to deform synchronously with the main layer 11, preventing microcracks. Compared to aluminum foil, EVOH eliminates the need for an additional protective layer during the heat-sealing process and can be directly melt-bonded to the main layer 11, simplifying the production process.

[0067] Compared to existing technologies, traditional aluminum foil barrier layer 12 is prone to cracking due to metal fatigue when repeatedly squeezed in the packaging bag 1, resulting in a decrease in barrier performance. EVOH, on the other hand, adapts to external forces through flexible deformation of its molecular chains, maintaining the integrity of barrier layer 12. Aluminum foil requires a dry lamination process to bond to the main layer 11, which carries the risk of adhesive aging. EVOH, on the other hand, is formed through melt coextrusion into a composite structure with no interfacial bonding, eliminating the risk of delamination.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A medical disinfection cotton pad, comprising a packaging bag and a cotton pad, wherein the cotton pad is sealed and contained in the packaging bag, characterized in that: The packaging bag is made of a deformable and resilient material, and the cotton sheet has a disinfection space, the entrance of which corresponds to the opening of the packaging bag. After the packaging bag is torn open, the bag opening can be opened by squeezing both sides of the package, and the entrance to the disinfection space can be opened along with the bag opening.

2. A medical disinfection cotton sheet according to claim 1, characterized in that: Both sides of the packaging bag are provided with inwardly concave folding parts, and the folding parts are used to open the bag opening.

3. A medical disinfection cotton sheet according to claim 1, characterized in that: The bottom of the packaging bag is provided with an inwardly recessed folding portion, and the folding portion is used to open the bag opening.

4. A medical disinfection cotton sheet according to claim 1, characterized in that: Elastic strips are provided on both sides of the bag opening of the packaging bag, and the elastic strips are used for supporting and opening the bag opening.

5. A medical disinfection cotton sheet according to claim 4, characterized in that: The packaging bag has a V-shaped or inverted eight-shaped fold corresponding to the bag opening.

6. A medical disinfection cotton pad according to any one of claims 1 to 5, characterized in that: The top of the packaging bag is provided with tearing indentations and tearing notches corresponding to each other, and the tearing indentations and tearing notches are both arranged above the elastic strips.

7. A medical disinfection cotton sheet according to claim 6, characterized in that: The cotton piece is in the shape of a fingertip, and two side surfaces of the cotton piece are respectively connected to the inner wall of the packaging bag.

8. A medical disinfection cotton pad according to claim 7, characterized in that: The cotton sheet is folded in half, and the two folded surfaces of the cotton sheet are respectively connected to the inner side of the packaging bag.

9. A medical disinfection cotton pad according to claim 8, characterized in that: The cotton sheets are composed of two pieces and are respectively connected to the inner walls of the packaging bag.

10. A medical disinfection cotton pad according to claim 9, characterized in that: The packaging bag comprises a main body layer and a barrier layer, wherein the main body layer is made of kraft paper, PE or PET material, and the barrier layer is made of aluminum foil or EVOH material.

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