Medical airtight cloth antibacterial and anti-drop detection device and detection process

Abstract

This invention belongs to the field of medical airtight fabric testing, specifically a medical airtight fabric antibacterial and drop-resistant testing device and process, including: a frame and a fixed base; a counterweight assembly, set on one side of the frame, including a water tank that slides vertically along the frame and an inlet hose and an outlet hose set on the water tank; a lifting assembly, set on the other side of the frame, including a support plate that slides vertically along the frame, the surface of the support plate having a through groove that matches the outer contour of the fixed base; and a connecting assembly for connecting the counterweight assembly and the lifting assembly in series, including a first pulley rotated on the top of the frame and a steel wire rope in contact with the first pulley. By setting the support plate, when the sample falls, it can pass through the through groove on the surface of the support plate and collide with the fixed base, that is, the sample falls directly after hovering, which can improve the stability of the sample's posture when falling, thereby improving the consistency of the posture of each fall and the repeatability of the test.

Description

Technical Field

[0001] This invention relates to the field of medical airtight fabric testing, specifically a medical airtight fabric antibacterial and impact-resistant testing device and testing process. Background Technology

[0002] Medical airtight fabric is a composite medical packaging material with good gas barrier properties and physical strength. In packaging applications, this material is made into bag-shaped or blister box lids to seal medical devices inside. After terminal sterilization by ethylene oxide, irradiation or steam, it maintains an internal sterile environment during transportation and storage until it is opened for clinical use.

[0003] Because the packaged product may be subjected to physical stresses such as dropping during loading and unloading, stacking and squeezing, and transportation vibrations during the entire logistics process, these stresses may cause material damage, coating peeling, or seal cracking, thereby weakening its microbial barrier efficacy or antibacterial activity. Therefore, it is necessary to conduct joint testing of its drop resistance and antibacterial performance before it leaves the factory. The core testing principle is: first, apply controlled mechanical damage to the finished packaging through a physical challenge test simulating transportation; then, take samples of the fabric after the challenge, and use bacterial inoculation film culture combined with ATP bioluminescence method to determine the residual activity of bacteria surviving on the surface. By comparing the difference in antibacterial rate between damaged and intact samples, the actual impact of physical damage on antibacterial function can be quantitatively evaluated.

[0004] The aforementioned existing technologies have the following drawbacks: The common drop resistance testing method currently involves placing the sample on a deflectable support plate and triggering a mechanism to instantly flip the support plate and release the sample, allowing it to fall freely and impact a rigid base. However, this flipping action itself will apply unnecessary lateral disturbances to the sample, causing the sample to tilt or rotate uncontrollably when it leaves the support plate, ultimately impacting the ground in a non-repeatable posture. This results in poor consistency in the drop posture of samples from the same batch, interferes with the standardized control of the collision point and the direction of force, and reduces the comparability and reproducibility of the test results.

[0005] Therefore, a medical airtight fabric antibacterial and impact-resistant testing device and testing process are proposed to address the above problems. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The medical airtight antibacterial and anti-fall testing device of the present invention includes: a frame and a fixed base; a counterweight assembly, disposed on one side of the frame, including a water tank that slides vertically along the frame and an inlet hose and an outlet hose disposed on the water tank; a lifting assembly, disposed on the other side of the frame, including a support plate that slides vertically along the frame, the surface of the support plate having a through groove that matches the outer contour of the fixed base; and a connecting assembly for connecting the counterweight assembly and the lifting assembly in series, including a first pulley that is rotatably disposed on the top of the frame and a steel wire rope that contacts the first pulley, wherein one end of the steel wire rope is fixedly connected to the support plate and the other end is fixedly connected to the water tank.

[0008] Preferably, the counterweight assembly further includes a baffle and several mounting slots, wherein the mounting slots are disposed on the surface of the frame and are detachably connected to the baffle.

[0009] Preferably, the counterweight assembly also includes several anti-sloshing plates installed inside the water tank to suppress the sloshing and impact of the liquid inside the water tank.

[0010] Preferably, the counterweight assembly also includes several buffer pads disposed at the bottom of the water tank to reduce the impact generated when the water tank and the baffle come into contact.

[0011] Preferably, the connecting assembly further includes a bracket and a second pulley, wherein the bracket is fixedly disposed on the top of the frame, and the second pulley is rotatably disposed on the bottom of the bracket and located directly above the first pulley.

[0012] Preferably, the lifting assembly also includes several contour grooves disposed on the surface of the tray to adapt to different postures of the sample.

[0013] This invention also provides a medical airtight fabric antibacterial and drop-resistant testing process, using a medical airtight fabric antibacterial and drop-resistant testing device, including the following steps: S1. Sample preparation: The test samples of packaging products made of medical airtight fabric are randomly divided into test group and control group, and the condition is adjusted. S2. Drop test: Place the test sample on the contour groove of the tray, drive the tray to move using the connecting components and counterweight components, adjust the drop height of the sample by controlling the water inlet or outlet speed of the water tank, and perform a free drop test simulating transportation stress on the test group samples. S3. Sampling: After the drop test is completed, the test samples are visually inspected, and fabric samples are cut from the test group samples and control group samples that have passed the visual inspection. S4. Antibacterial performance test: The antibacterial performance of each fabric sample obtained in S3 was tested to obtain the bacterial residual activity data of the test group and the control group. S5. Judgment: Calculate the antibacterial rate of the test group based on the bacterial residual activity data obtained in S4. If the antibacterial rate is not lower than the predetermined threshold, it is determined that the medical airtight cloth still maintains effective antibacterial performance after undergoing physical challenges.

[0014] Preferably, the antibacterial performance test in S4 includes the following steps: S41. Preparation and inoculation of bacterial suspension: Prepare bacterial suspension using standard strains, and evenly drop the bacterial suspension into the central area of ​​each fabric sample obtained in S3. S42. Film-coated culture: Cover the sample surface with a sterile film and adhere it, then place it in an incubator for constant temperature and humidity culture for 4 to 6 hours. S43. Surface sample collection: After the culture is completed, remove the film, wipe the original inoculation area of ​​the sample with a sterile swab, and transfer the swab head to a centrifuge tube containing sterile physiological saline and elute by shaking. S44, ATP fluorescence detection: Take the eluent from S43 and mix it with the luciferin-luciferase reaction solution, place it in an ATP fluorescence detector and measure the relative luminescence unit value. The relative luminescence unit value is used to characterize the bacterial residual activity.

[0015] The advantages of this invention are: 1. The medical airtight fabric antibacterial and drop-resistant testing device and testing process of the present invention, by setting a tray, when the sample falls, it can pass through the through groove on the surface of the tray and collide with the fixed seat. That is, the sample falls directly after hovering, which can improve the stability of the sample's posture when falling, thereby improving the consistency of the posture of each fall and the repeatability of the test.

[0016] 2. The medical airtight fabric antibacterial and anti-fall testing device and testing process of the present invention, wherein the baffle is installed to the mounting groove at different heights by bolts, the installation height of the baffle can be adjusted, thereby adjusting the initial lowest point position of the water tank, and thus adjusting the initial suspension height of the support plate. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the main body of the present invention; Figure 2 This is a schematic diagram of the frame structure in this invention; Figure 3 This is a schematic diagram of the structure of the tray in this invention; Figure 4This is a schematic diagram of the water tank structure in this invention; Figure 5 This is a schematic diagram of the contour groove in this invention.

[0019] In the diagram: 1. Frame; 12. Pallet; 13. Water tank; 14. First pulley; 15. Steel wire rope; 16. Fixing seat; 2. Baffle; 22. Mounting groove; 3. Anti-surge plate; 4. Buffer pad; 5. Bracket; 52. Second pulley; 6. Contouring groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Specific implementation examples are given below.

[0022] Please see Figures 1 to 5 As shown in the embodiment of the present invention, a medical airtight antibacterial and anti-fall testing device includes: a frame 1 and a fixed base 16; a counterweight assembly disposed on one side of the frame 1, including a water tank 13 that slides vertically along the frame 1 and an inlet hose and an outlet hose disposed on the water tank 13; a lifting assembly disposed on the other side of the frame 1, including a support plate 12 that slides vertically along the frame 1, wherein the surface of the support plate 12 has a through groove that matches the outer contour of the fixed base 16; and a connecting assembly for connecting the counterweight assembly and the lifting assembly in series, including a first pulley 14 rotatably disposed on the top of the frame 1 and a steel wire rope 15 that contacts the first pulley 14, wherein one end of the steel wire rope 15 is fixedly connected to the support plate 12 and the other end is fixedly connected to the water tank 13; Initially, the packaged sample can be placed on top of the tray 12, with a portion of the sample positioned within a groove on the surface of the tray 12. At this point, a fixed amount of liquid (such as water) is injected into the water tank 13. The liquid's gravity pulls down one end of the cable directly connected to the steel wire rope 15, which converts this force into an upward pull applied to the other end of the tray 12. Thus, the tray 12 is initially suspended. After the sample is placed, the liquid in the water tank 13 can be extracted using a pump connected to a water outlet hose (located on the side wall or bottom of the water tank 13). As the liquid in the water tank 13 decreases, the downward pull exerted by the water tank 13 on the steel wire rope 15 will be less than the downward pull exerted by the tray 12 on the steel wire rope 15. A counterweight can be placed on the tray 12. When the liquid in the water tank 13 decreases to a certain level (e.g., completely extracted or with only a small amount remaining), the downward pull exerted by the tray 12 on the steel wire rope 15 becomes dominant. This force is much greater than the downward pull exerted by the water tank 13 on the steel wire rope 15, allowing the sample on the pallet 12 to fall with the pallet 12 under the influence of gravity. During the descent, the fixing seat 16 can pass through the through groove on the surface of the pallet 12 and cause the sample to collide with the fixing seat 16, thus completing the drop test on one side of the sample. Subsequently, liquid can be delivered into the water tank 13 through the delivery pump connected by the water inlet hose to reset the pallet 12 to its initial position. Then, the sample is switched to one side and placed on top of the pallet 12, such as switching the sample from bottom to side to face the fixing seat 16 to complete the drop test on the end face and side of the sample, simulating the most unfavorable impact situation during sample transportation. By setting the pallet 12, the sample can pass through the through groove on the surface of the pallet 12 and collide with the fixing seat 16 when falling, that is, the sample falls directly after hovering, which can improve the stability of the sample's attitude during the fall, thereby improving the consistency of the attitude of each fall and the repeatability of the test.

[0023] Please see Figure 2 and Figure 3 As shown, the counterweight assembly also includes a baffle 2 and several mounting slots 22, wherein the mounting slots 22 are disposed on the surface of the frame 1 and are detachably connected to the baffle 2; Before the sample is loaded, the water tank 13 contains liquid and is at its lowest point. This lowest point is marked by the position of the baffle 2. Specifically, the baffle 2 is bolted to the mounting slots 22 at different heights, which allows for adjustment of the installation height of the baffle 2, thereby adjusting the initial lowest point position of the water tank 13, and consequently adjusting the initial suspension height of the support plate 12.

[0024] Please see Figure 4 As shown, the counterweight assembly also includes several anti-surge plates 3 installed inside the water tank 13 to suppress the sloshing and impact of the liquid inside the water tank 13. The wave deflector 3 has holes to ensure that the liquid in the water tank 13 flows between adjacent wave deflectors 3. After the sample completes the drop test, liquid needs to be added to the water tank 13. During this process, the water tank 13 descends and collides with the baffle 2. The collision can be transmitted to the liquid inside the water tank 13. If the liquid inside the water tank 13 is not full, it will shake. The wave deflector 3 can divide the shaking liquid into several water flows, thereby weakening the overall impact of the liquid.

[0025] Please see Figure 4 As shown, the counterweight assembly also includes several buffer pads 4 disposed at the bottom of the water tank 13 to reduce the impact generated when the water tank 13 and the baffle 2 come into contact. The buffer pad 4 can absorb the impact generated when the water tank 13 and the baffle 2 collide through its own elastic structure, thereby reducing the damage to the baffle 2 and the water tank 13 during operation.

[0026] Please see Figure 2 As shown, the connecting assembly also includes a bracket 5 and a second pulley 52, wherein the bracket 5 is fixedly mounted on the top of the frame 1, and the second pulley 52 is rotatably mounted on the bottom of the bracket 5 and located directly above the first pulley 14; The second pulley 52 can work with the first pulley 14 to constrain and limit the wire rope 15, thereby ensuring that the wire rope 15 moves along a preset trajectory when sliding with the pallet 12 or the water tank 13, reducing the possibility of the wire rope 15 falling off the first pulley 14.

[0027] Please see Figure 5 As shown, the lifting assembly also includes several contour grooves 6 disposed on the surface of the tray 12 to adapt to different postures of the sample. The tray 12 can be pre-cut with contour grooves 6, and several contour grooves 6 can be specifically adapted to the length of different sides of the sample, thereby improving the stability of the sample when it is placed in different postures.

[0028] This invention also provides a medical airtight fabric antibacterial and drop-resistant testing process, using a medical airtight fabric antibacterial and drop-resistant testing device, including the following steps: S1. Sample preparation: The test samples of packaging products made of medical airtight fabric are randomly divided into test group and control group, and the condition is adjusted. S2. Drop test: Place the test sample on the contour groove 6 of the tray 12, drive the tray 12 to move using the connecting component and the counterweight component, adjust the drop height of the sample by controlling the water inlet or outlet speed of the water tank 13, and perform a free drop test simulating transportation stress on the test group samples. S3. Sampling: After the drop test is completed, the test samples are visually inspected, and fabric samples are cut from the test group samples and control group samples that have passed the visual inspection. S4. Antibacterial performance test: The antibacterial performance of each fabric sample obtained in S3 was tested to obtain the bacterial residual activity data of the test group and the control group. S5. Judgment: Calculate the antibacterial rate of the test group based on the bacterial residual activity data obtained in S4. If the antibacterial rate is not lower than the predetermined threshold, it is determined that the medical airtight cloth still maintains effective antibacterial performance after undergoing physical challenges.

[0029] The antimicrobial performance test in S4 includes the following steps: S41. Preparation and inoculation of bacterial suspension: Prepare bacterial suspension using standard strains, and evenly drop the bacterial suspension into the central area of ​​each fabric sample obtained in S3. S42. Film-coated culture: Cover the sample surface with a sterile film and adhere it, then place it in an incubator for constant temperature and humidity culture for 4 to 6 hours. S43. Surface sample collection: After the culture is completed, remove the film, wipe the original inoculation area of ​​the sample with a sterile swab, and transfer the swab head to a centrifuge tube containing sterile physiological saline and elute by shaking. S44, ATP fluorescence detection: Take the eluent from S43 and mix it with the luciferin-luciferase reaction solution, place it in an ATP fluorescence detector and measure the relative luminescence unit value. The relative luminescence unit value is used to characterize the bacterial residual activity.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A medical airtight cloth antibacterial and anti-drop detection device, characterized in that: include: Frame (1), mounting base (16); The counterweight assembly is located on one side of the frame (1) and includes a water tank (13) that slides vertically along the frame (1) and an inlet hose and an outlet hose located on the water tank (13). The lifting assembly is located on the other side of the frame (1) and includes a support plate (12) that slides vertically along the frame (1). The surface of the support plate (12) is provided with a through groove that matches the outer contour of the fixed seat (16). A connecting assembly for connecting the counterweight assembly and the lifting assembly in series includes a first pulley (14) rotatably mounted on the top of the frame (1) and a wire rope (15) in contact with the first pulley (14), wherein one end of the wire rope (15) is fixedly connected to the pallet (12) and the other end is fixedly connected to the water tank (13).

2. The medical airtight cloth antibacterial and anti-drop detection device and detection process according to claim 1, characterized in that: The counterweight assembly also includes a baffle (2) and several mounting slots (22), wherein the mounting slots (22) are disposed on the surface of the frame (1) and are detachably connected to the baffle (2).

3. The medical airtight antibacterial and impact-resistant testing device according to claim 2, characterized in that: The counterweight assembly also includes several anti-surge plates (3) installed inside the water tank (13) to suppress the sloshing and impact of the liquid inside the water tank (13).

4. The medical airtight antibacterial and impact-resistant testing device according to claim 2, characterized in that: The counterweight assembly also includes several buffer pads (4) set at the bottom of the water tank (13) to reduce the impact generated when the water tank (13) and the baffle (2) come into contact.

5. The medical airtight antibacterial and impact-resistant testing device according to claim 1, characterized in that: The connecting assembly also includes a bracket (5) and a second pulley (52), wherein the bracket (5) is fixedly mounted on the top of the frame (1), and the second pulley (52) is rotatably mounted on the bottom of the bracket (5) and located directly above the first pulley (14).

6. The medical airtight antibacterial and impact-resistant testing device according to claim 1, characterized in that: The lifting assembly also includes several contour grooves (6) set on the surface of the tray (12) to adapt to different postures of the sample.

7. A medical airtight fabric antibacterial and drop-resistant testing process, using the medical airtight fabric antibacterial and drop-resistant testing device according to any one of claims 1-6, characterized in that: Includes the following steps: S1. Sample preparation: The test samples of packaging products made of medical airtight fabric are randomly divided into test group and control group, and the condition is adjusted. S2, Drop test: Place the test sample on the contour groove (6) of the tray (12), drive the tray (12) to move using the connecting component and the counterweight component, adjust the drop height of the sample by controlling the water inlet or outlet speed of the water tank (13), and perform a free drop test simulating transportation stress on the test group sample. S3. Sampling: After the drop test is completed, the test samples are visually inspected, and fabric samples are cut from the test group samples and control group samples that have passed the visual inspection. S4. Antibacterial performance test: The antibacterial performance of each fabric sample obtained in S3 was tested to obtain the bacterial residual activity data of the test group and the control group. S5. Judgment: Calculate the antibacterial rate of the test group based on the bacterial residual activity data obtained in S4. If the antibacterial rate is not lower than the predetermined threshold, it is determined that the medical airtight cloth still maintains effective antibacterial performance after undergoing physical challenges.

8. The medical airtight fabric antibacterial and impact-resistant testing process according to claim 7, characterized in that: The antimicrobial performance test in S4 includes the following steps: S41. Preparation and inoculation of bacterial suspension: Prepare bacterial suspension using standard strains, and evenly drop the bacterial suspension into the central area of ​​each fabric sample obtained in S3. S42. Film-coated culture: Cover the sample surface with a sterile film and adhere it, then place it in an incubator for constant temperature and humidity culture for 4 to 6 hours. S43. Surface sample collection: After the culture is completed, remove the film, wipe the original inoculation area of ​​the sample with a sterile swab, and transfer the swab head to a centrifuge tube containing sterile physiological saline and elute by shaking. S44, ATP fluorescence detection: Take the eluent from S43 and mix it with the luciferin-luciferase reaction solution, place it in an ATP fluorescence detector and measure the relative luminescence unit value. The relative luminescence unit value is used to characterize the bacterial residual activity.

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