An automated device and method for post-treatment of a surgical drape after preparation

Abstract

The present invention discloses an automated device and method for post-treatment of surgical drapes, which relates to the field of fabric drying treatment. The method includes the following steps: S1. Freeze-treat the surgical drapes to be dried; S2. Use medium and low temperature hot air circulation to remove surface water and melt the inner ice crystals; S3. Disconnect from the low temperature hot air circulation for a period of time; S4. Use far-infrared radiation and utilize the absorption characteristics of silver ions in specific wavelength bands to achieve post-treatment drying of the surgical drapes. Through the multi-step collaborative drying combining freeze-treatment, hot air circulation, standing, and far-infrared radiation, not only is the moisture diffusion efficiency greatly improved and deep moisture residue reduced, but also the antibacterial performance decline caused by high-temperature oxidation or agglomeration of nano-silver particles in the antibacterial layer is effectively avoided, while fiber deformation is inhibited, ensuring the dimensional stability and antibacterial persistence of the drapes, thus achieving dual optimization of better drying efficiency and material property protection.

Description

Technical Field

[0001] The present invention relates to the technical field of fabric drying treatment, and particularly relates to an automated device and method for post-treatment of surgical drapes after preparation. Background Art

[0002] In surgical operations, maintaining the cleanliness and sterility of the surgical area is one of the key factors to ensure the success of the operation and the recovery of the patient. To achieve this goal, surgical drapes are widely used during the operation to cover the surgical area, prevent external microorganisms from invading, and absorb liquids such as blood and body fluids generated during the operation to keep the surgical site dry.

[0003] With the progress of technology, traditional surgical drapes have gradually been replaced by drapes with special functions. Among them, surgical drapes with a silver ion antibacterial layer are favored due to their excellent antibacterial properties. The surgical drape with a silver ion antibacterial layer embeds nano-scale silver particles into the fibers and utilizes the broad-spectrum antibacterial characteristics of silver ions to effectively kill or inhibit the growth of bacteria in the surgical area, thereby reducing the risk of surgical site infection.

[0004] After the base material layer (non-woven fabric / composite film) is compounded with the silver ion antibacterial layer and before being compounded with the washing liquid layer, the surgical drape needs a washing step to remove impurities and contaminants. After washing, the drape needs to be dried to restore its service performance. However, for the drape with a silver ion antibacterial layer, high-temperature drying will cause the nano-silver particles to accelerate oxidation or agglomeration, thereby reducing the density of their active sites and causing the antibacterial performance to decline.

[0005] Therefore, it is necessary to improve the deficiencies in the prior art to solve the above problems. Summary of the Invention

[0006] The present invention overcomes the deficiencies of the prior art and provides an automated device and method for post-treatment of surgical drapes after preparation.

[0007] To achieve the above object, the technical solution adopted by the present invention is: a post-treatment method for the preparation of surgical drapes, comprising the following steps:

[0008] S1. Freeze the surgical drape to be dried so that water changes from a liquid state to solid ice crystals;

[0009] S2. Use medium and low-temperature hot air circulation for the frozen surgical drape to remove the surface water and melt the inner ice crystals;

[0010] S3. Disconnect from the low-temperature hot air circulation for a period of time to allow the water inside the surgical drape to diffuse to the surface;

[0011] S4. Adopt far-infrared radiation, utilize the absorption characteristics of silver ions in specific wavebands, and achieve the post-treatment of drying the surgical drape.

[0012] In a preferred embodiment of the present invention, in the step of S1, the surgical drape is made of a non-woven fabric / composite film material containing a silver ion antibacterial layer.

[0013] In a preferred embodiment of the present invention, in the step of S1, the temperature of the freezing treatment is -30~-50°C, and the time is 1~5 min.

[0014] In a preferred embodiment of the present invention, in the step of S2, the temperature of the hot air circulation is 40~45 °C, the wind speed is 2~4 m / s, and the time is 3~5 min.

[0015] In a preferred embodiment of the present invention, in the step of S3, the time for separating from the low-temperature hot air circulation is 30~50 s.

[0016] In a preferred embodiment of the present invention, in the step of S4, the wavelength of the far-infrared radiation is 3~5μm, the power is 0.5~1.2 W / cm², and the time is 40~80 s.

[0017] The present invention provides a post-treatment automation device for the post-treatment method of preparing a surgical drape, including: a material placement table, a freezing mechanism, a material conveying mechanism, and a transfer robotic arm;

[0018] The material placement table is used for placing the surgical drape to be dried;

[0019] The freezing mechanism is used for freezing the surgical drape to be dried;

[0020] The material conveying mechanism is used for conveying the surgical drape. Among them, a hot air drying component for medium-low temperature hot air circulation drying of the surgical drape and a radiation drying component for far-infrared radiation drying of the surgical drape are sequentially installed on the top of the material conveying mechanism;

[0021] The transfer robotic arm is used for transferring the surgical drape between the material placement table, the freezing mechanism, and the material conveying mechanism.

[0022] In a preferred embodiment of the present invention, the material conveying mechanism includes: an equipment frame, a conveyor belt installed on the equipment frame, and a power source installed on the equipment frame for driving the conveyor belt to achieve circumferential cyclic rotation; a plurality of rubber strips for reducing the contact area of the surgical drape on the surface of the conveyor belt are fixed on the side of the conveyor belt.

[0023] In a preferred embodiment of the present invention, the hot air drying assembly includes: a hot air drying frame fixed to the top of the equipment rack, a hot air blower installed on the top of the hot air drying frame, and a shunt pipe fixed to the inner top of the hot air drying frame; the side of the shunt pipe is fixed to the output end of the hot air blower, and a plurality of air outlets are fixed to the side facing the top of the conveyor belt; a plurality of ventilation fans for air circulation are provided on the side of the hot air drying frame.

[0024] In a preferred embodiment of the present invention, the radiation drying assembly includes: a radiation drying frame fixed to the top of the equipment rack, a plurality of ceramic infrared heaters fixed to the inner top of the radiation drying frame for heating by infrared rays, and a controller installed on the top of the radiation drying frame for controlling the plurality of ceramic infrared heaters to achieve heating.

[0025] The present invention solves the defects existing in the background technology, and the present invention has the following beneficial effects:

[0026] (1) The present invention provides a post-treatment method for the preparation of surgical drapes. Through the multi-step coordinated drying combining freezing treatment, hot air circulation, static setting and far-infrared radiation, not only the moisture diffusion efficiency is greatly improved, the deep moisture residue is reduced, but also the antibacterial performance decline caused by the high-temperature oxidation or agglomeration of nano-silver particles in the silver ion antibacterial layer is effectively avoided. At the same time, the fiber deformation is inhibited, ensuring the dimensional stability and antibacterial persistence of the drape, so as to achieve low-temperature, efficient and gentle drying treatment, with double optimization of better drying efficiency and material property protection.

[0027] (2) In the post-treatment method of the present invention, through the staged dehydration optimization and accurate energy delivery, while ensuring the drying efficiency, the far-infrared radiation time can be compressed to the lowest necessary range, and the risk of performance decline of the silver ion antibacterial layer can be avoided, so as to maintain the high antibacterial performance of the surgical drape before treatment.

[0028] (3) In the post-treatment method of the present invention, by first performing freezing treatment, using the ice crystal expansion to squeeze the amorphous region of the fiber to form a porous structure, making the fiber fluffy, improving the subsequent moisture diffusion efficiency, reducing the deep moisture residue, and then after the medium-low temperature hot air circulation, performing static setting to make the internal moisture migrate to the surface to form a moisture gradient diffusion, which can avoid the sudden increase in the concentration of nano-silver particles in a certain part, avoid the formation of larger particles, and reduce the possibility of physical agglomeration.

[0029] (4) The present invention provides an automated post-processing equipment for the preparation of surgical drapes. By integrating a material placement table, a freezing mechanism, a material conveying mechanism and a transfer robot arm, a complete automated processing equipment is formed. The equipment can realize multi-step automated operations such as loading, freezing, transfer, hot air circulation, standing and far-infrared radiation for surgical drapes to be dried. The entire process is coordinated by the various components of the mechanism, and only manual loading is required to realize the fully automated processing of surgical drapes from pretreatment to drying, thereby improving the processing efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 is a flow chart of a post-processing method according to a preferred embodiment of the present invention;

[0032] Figure 2 It is an overall structural diagram of the post-processing automation equipment of the preferred embodiment of the present invention;

[0033] Figure 3 is a side structural diagram of a post-processing automation device according to a preferred embodiment of the present invention;

[0034] Figure 4 It is a half-section structural diagram of a hot air drying frame and a radiation drying frame of a preferred embodiment of the present invention;

[0035] In the figure: 1. Material placement table; 2. Refrigeration mechanism; 3. Material conveying mechanism; 31. Equipment frame; 32. Conveyor belt; 33. Rubber strip; 4. Transfer robot arm; 5. Hot air drying component; 51. Hot air drying frame; 52. Hot air blower; 53. Diverter pipe; 54. Air outlet; 55. Ventilation fan; 6. Radiation drying component; 61. Radiation drying frame; 62. Ceramic infrared heater; 63. Controller. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0037] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways than those described herein. Therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application 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 thus should not be construed as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0039] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood through specific situations.

[0040] It should be noted that the automatic post-treatment equipment and method for the preparation of the surgical drape of the present invention are preferably applicable to the post-drying treatment of the surgical drape after the composite washing of the base material layer (non-woven fabric / composite film) and the silver ion antibacterial layer.

[0041] As Figure 1 shown, a method for post-treatment of the preparation of a surgical drape includes the following steps:

[0042] S1. Freeze the surgical drape to be dried so that water changes from a liquid state to solid ice crystals.

[0043] S2. Use medium and low temperature hot air circulation for the frozen surgical drape to remove the surface water and melt the inner ice crystals.

[0044] S3. Disconnect from the low temperature hot air circulation for a period of time to allow the water inside the surgical drape to diffuse to the surface.

[0045] S4. Use far-infrared radiation and the absorption characteristics of silver ions on specific bands to achieve post-drying processing of surgical drapes.

[0046] In some specific embodiments, in step S1, the surgical drape is made of a non-woven fabric / composite membrane material containing a silver ion antibacterial layer.

[0047] In some specific embodiments, in step S1, the freezing treatment temperature is -30 to -50°C and the time is 1 to 5 min.

[0048] In some specific embodiments, in step S2, the temperature of the hot air circulation is 40-45° C., the wind speed is 2-4 m / s, and the time is 3-5 min.

[0049] In some specific implementations, in step S3, the time for leaving the low-temperature hot air circulation is 30 to 50 seconds.

[0050] In some specific embodiments, in step S4, the wavelength of the far-infrared radiation is 3-5 μm, the power is 0.5-1.2 W / cm², and the time is 40-80 s.

[0051] In order to further make the purpose and effect of the present invention simple and easy to understand, the present invention is further described in combination with the following specific examples and comparative examples. Among them, the surgical drape is composed of a non-woven fabric containing a silver ion antibacterial layer, and the water content of the surgical drape after washing is 30%.

[0052] Example 1

[0053] S1. Freeze the surgical drape with a water content of 30% at -30°C for 3 min to convert the water from liquid to solid ice crystals.

[0054] S2. Dry the frozen surgical drapes with medium-low temperature hot air circulation at 40°C and a wind speed of 3 m / s for 4 min to remove surface water and melt the inner ice crystals.

[0055] S3, discontinue the low-temperature hot air circulation for 40 seconds to allow the water inside the surgical drape to diffuse to the surface;

[0056] S4. Use far-infrared radiation, through the far-infrared radiation wavelength of 4 μm, take advantage of the absorption characteristics of silver ions to specific bands, radiate drying at a power of 0.8 W / cm² for 40 s, so that the moisture content of the surgical drape can be reduced to less than 2%, and post-drying treatment can be achieved.

[0057] Example 2

[0058] This embodiment is basically the same as Embodiment 1, except that: the steps of S4 are specifically as follows: far-infrared radiation is adopted, through a far-infrared radiation wavelength of 4 μm, using the absorption characteristics of silver ions for specific bands, with a power of 0.8 W / cm², and radiation drying is carried out for 60 s to reduce the water content of the surgical drape to less than 2%, so as to achieve post-drying treatment.

[0059] Embodiment 3

[0060] This embodiment is basically the same as Embodiment 1, except that: the steps of S4 are specifically as follows: far-infrared radiation is adopted, through a far-infrared radiation wavelength of 4 μm, using the absorption characteristics of silver ions for specific bands, with a power of 0.8 W / cm², and radiation drying is carried out for 80 s to reduce the water content of the surgical drape to less than 2%, so as to achieve post-drying treatment.

[0061] Comparative Example 1

[0062] For the surgical drape with a water content of 30%, high-temperature hot air circulation is adopted, at a temperature of 60 °C and a wind speed of 3 m / s, and hot air drying is carried out for 7 min to reduce the water content of the surgical drape to less than 2%, so as to achieve post-drying treatment.

[0063] Comparative Example 2

[0064] For the surgical drape with a water content of 30%, far-infrared radiation is adopted, through a far-infrared radiation wavelength of 4 μm, using the absorption characteristics of silver ions for specific bands, with a power of 0.8 W / cm², and radiation drying is carried out for 4 min to reduce the water content of the surgical drape to less than 2%, so as to achieve post-drying treatment.

[0065] Comparative Example 3

[0066] This comparative example is basically the same as Embodiment 1, except that: there is no step of S1; the water content of the surgical drape is not reduced to less than 2%.

[0067] Comparative Example 4

[0068] This comparative example is basically the same as Comparative Example 3, except that: the radiation drying time is 100 s, the water content of the surgical drape is reduced to less than 2%, so as to achieve post-drying treatment.

[0069] Comparative Example 5

[0070] This comparative example is basically the same as Embodiment 1, except that: step S3; the water content of the surgical drape is reduced to less than 2%, so as to achieve post-drying treatment.

[0071] Performance detection: The unwashed surgical drapes with the non-woven fabric and silver ion antibacterial layer composite were used as the blank group, and the antibacterial rate tests were carried out on Examples 1-3, Comparative Examples 1-2, and Comparative Examples 4-5. Comparative Example 3 gave up the experiment because it did not achieve complete drying. The test results are shown in Table 1.

[0072] Antibacterial rate: Cut a sample with a diameter of 3 cm in the middle of the surgical drape to be tested. Place the 3 cm circular sample surgical drape on the bacterial culture dish and observe and measure its prevention and treatment effectiveness after 12 hours of culture.

[0073] Table 1: Antibacterial rate test results

[0074]

[0075] It can be seen from Table 1 that:

[0076] By comparing Examples 1-3 with the blank group, it can be known that the drying process of the present invention realizes the maintenance of antibacterial performance for the surgical drapes after drying treatment through the multi-step collaborative drying of combining freeze treatment, hot air circulation, standing, and far-infrared radiation. First, the ice crystal expansion is utilized to generate extrusion on the amorphous region of the fiber, forming a porous structure, making the fiber fluffy, improving the subsequent moisture diffusion efficiency, reducing the residual moisture in the deep layer. Then, medium and low-temperature hot air is used to remove the surface moisture and melt the internal ice crystals, shortening the subsequent drying treatment time of far-infrared radiation. And through standing, the formed fiber porous structure is utilized to promote the migration of internal moisture to the surface, reducing the difficulty of deep drying. Finally, the absorption characteristics of silver ions in a specific wavelength band are utilized, and far-infrared radiation is used to further realize deep drying. Thereby, not only the moisture diffusion efficiency is greatly improved and the residual moisture in the deep layer is reduced, but also the antibacterial performance decline caused by the high-temperature oxidation or aggregation of nano-silver particles in the silver ion antibacterial layer is effectively avoided. At the same time, the fiber deformation is inhibited, ensuring the dimensional stability and antibacterial durability of the drape, thus realizing low-temperature, high-efficiency, and gentle drying treatment, and having the dual optimization of better drying efficiency and material performance protection.

[0077] By comparing Example 1 with Comparative Example 1, it can be known that for the traditional high-temperature hot air drying, although the treatment is simple and the efficiency is better, the silver ion antibacterial layer that realizes long-term antibacterial in the surgical drape is embedded in the fiber through nano-particles. After high-temperature drying treatment, it will cause the silver ions to accelerate oxidation and aggregation, reducing the density of active sites and making the antibacterial property decline.

[0078] It can be seen from the comparison between Example 1 and Comparative Example 2 that by utilizing the absorption characteristics of silver ions in a specific wavelength band through far-infrared radiation, although a relatively fast deep drying effect can be achieved, the thermal effect and photochemical effect generated by long-term far-infrared radiation, on the one hand, the thermal effect increases the temperature, accelerating the oxidation reaction of silver nanoparticles with oxygen to generate substances such as silver oxide, reducing the antibacterial performance; on the other hand, the photochemical effect enables silver nanoparticles to absorb photon energy and transition to a higher energy level, making it easier to react with oxygen to generate free radicals, further promoting oxidation. At the same time, the significant evaporation of moisture increases the concentration of silver nanoparticles, making physical aggregation more likely to occur, forming larger particles and reducing the effective surface area, thereby decreasing the antibacterial effect of the surgical drape.

[0079] It can be seen from the comparison between Example 1 and Comparative Example 3 and Comparative Example 4 that after canceling the freezing treatment of the surgical drape to be dried in Comparative Example 3, it is difficult to achieve efficient drying with the moisture content of the surgical drape reduced to less than 2% on the basis of Example 1 on the corresponding process basis. After increasing the drying treatment time of far-infrared radiation in Comparative Example 4, although drying treatment is achieved, it will also face the influence of over-long far-infrared radiation, resulting in oxidation and aggregation of silver nanoparticles, and unable to maintain the high antibacterial performance of the surgical drape before treatment. Furthermore, through staged dehydration optimization and precise energy delivery, while ensuring the drying efficiency, the medium and far-infrared radiation time can be compressed to the minimum necessary range, which can avoid the risk of performance decline of the silver ion antibacterial layer, thereby maintaining the high antibacterial performance of the surgical drape before treatment.

[0080] It can be seen from the comparison between Example 1 and Comparative Example 5 that after medium and low-temperature hot air circulation and then standing still to make the internal moisture migrate to the surface to form a moisture gradient diffusion, it is possible to avoid a sudden increase in the concentration of silver nanoparticles in a certain local area, avoid the formation of larger particles, and reduce the possibility of physical aggregation.

[0081] As Figure 2 shown, a post-processing automation device for the post-processing method of preparing a surgical drape includes: a material placement table 1, a freezing mechanism 2, a material conveying mechanism 3, and a transfer robotic arm 4; the material placement table 1 is used to place the surgical drape to be dried; the freezing mechanism 2 is used to freeze the surgical drape to be dried; the material conveying mechanism 3 is used to convey the surgical drape, wherein a hot air drying assembly 5 for medium and low-temperature hot air circulation drying of the surgical drape and a radiation drying assembly 6 for far-infrared radiation drying of the surgical drape are sequentially installed on the top of the material conveying mechanism 3; the transfer robotic arm 4 is used to transfer the surgical drape among the material placement table 1, the freezing mechanism 2, and the material conveying mechanism 3.

[0082] It should be noted that the transfer robotic arm 4 is located among the material placement table 1, the refrigeration mechanism 2, and the material conveying mechanism 3. A negative pressure suction cup for adsorbing materials is provided at the transfer moving end. The refrigeration mechanism 2 at least includes a housing and a refrigeration system inside the housing. The refrigeration system at least includes a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration process for providing freezing treatment is as follows: The refrigerant enters the compressor in a gaseous form, compresses the gaseous refrigerant, increasing its temperature and pressure. The high-temperature and high-pressure refrigerant gas is discharged from the compressor and enters the condenser, where it releases heat and turns into a liquid after cooling. The liquid refrigerant passes through the expansion valve, and the pressure drops suddenly, causing part of the liquid to evaporate rapidly and the temperature to drop. At this time, the refrigerant becomes a low-temperature and low-pressure mixed state (liquid and gas). The low-temperature and low-pressure refrigerant flows into the evaporator, absorbs heat from the air inside the housing, and rapidly evaporates into a gaseous state. The evaporation process absorbs the heat inside the housing, reducing the temperature inside the housing. This entire process is repeated continuously to maintain the freezing treatment environment inside the housing.

[0083] Specifically, by integrating the material placement table 1, the refrigeration mechanism 2, the material conveying mechanism 3, and the transfer robotic arm 4, a complete automated processing device is formed. The material placement table 1 is used for initially placing the surgical drapes to be processed. The refrigeration mechanism 2 uses the refrigeration system to perform freezing treatment on the surgical drapes to achieve a specific pretreatment effect. The material conveying mechanism 3 is responsible for transporting the surgical drapes from one place to another. During this process, medium and low-temperature hot air circulation drying and far-infrared radiation drying are respectively carried out through the hot air drying component 5 and the radiation drying component 6. Through the transfer robotic arm 4, which is the bridge connecting each processing link, the automated transfer of the surgical drapes is realized. Furthermore, multi-step automated operations such as feeding, freezing treatment, transfer, hot air circulation, standing, and far-infrared radiation can be achieved for the surgical drapes to be dried. Through the collaborative work of each mechanism component in the entire process, only manual feeding is required to achieve the full automation of the surgical drapes from pretreatment to drying, improving the processing efficiency and accuracy.

[0084] As Figure 2 and Figure 3 shown, in some specific embodiments, the material conveying mechanism 3 includes: an equipment frame 31, a conveyor belt 32 installed on the equipment frame 31, and a power source installed on the equipment frame 31 for driving the conveyor belt 32 to achieve circumferential cyclic rotation; several rubber strips 33 are fixed on the side of the conveyor belt 32 to reduce the contact area of the surgical drapes on the surface of the conveyor belt 32.

[0085] It should be noted that the power source at least includes several conveying rollers rotatably connected to the equipment frame 31 and a driving device for driving the several conveying rollers. The inner side of the conveyor belt 32 should be sleeved on the sides of the several conveying rollers, and the driving device can be a power element including a stepper motor and a servo motor. As the driving device of the conveying rollers, it drives the conveying rollers to rotate and then drives the conveyor belt 32 to achieve circumferential cyclic rotation, which can be realized by technical means known to those skilled in the art, so it will not be elaborated here.

[0086] Specifically, when the surgical drape is transported to the top of the conveyor belt 32 on the equipment frame 31, the power source composed of several conveying rollers and a driving device can drive the conveyor belt 32 to rotate circumferentially in a cycle to realize the transportation of the surgical drape. At the same time, the rubber strips 33 fixed on the conveyor belt 32 are used to reduce the contact area between the surgical drape and the surface of the conveyor belt 32, which may help reduce friction and keep the surgical drape flat.

[0087] Such as Figure 4 As shown, in some specific embodiments, the hot air drying assembly 5 includes: a hot air drying frame 51 fixed to the top of the equipment frame 31, a hot air blower 52 installed on the top of the hot air drying frame 51, and a shunt pipe 53 fixed to the inner top of the hot air drying frame 51; the side of the shunt pipe 53 is fixed to the output end of the hot air blower 52, and several air outlets 54 are fixed to the side facing the top of the conveyor belt 32; several ventilation fans 55 for air circulation are provided on the side of the hot air drying frame 51.

[0088] It should be noted that the hot air drying frame 51 is a rectangular structure with an open bottom, and openings are provided at the bottoms of both sides facing the conveying direction of the conveyor belt 32 to avoid obstacles when the conveyor belt 32 transports the surgical drape into it; several air outlets 54 are evenly distributed on the side of the shunt pipe 53 in a linear array to provide uniform air supply and drying conditions for the surgical drape; the hot air blower 52 at least includes a blower, a heater and a control circuit for realizing the regulation of working temperature and air volume. During the drying operation, the blower in the hot air blower 52 blows air into the heater, so that the air passes evenly through the inside and outside of the spiral heating wire. After the heating wire is electrified, the heat generated is exchanged with the passing cold air to raise the air temperature at the air outlet, thus realizing the increase of air temperature and air blowing.

[0089] Specifically, the hot air drying assembly 5 uses the hot air blower 52 on the top of the hot air drying frame 51 to blow air into the heater for heating by using the blower and the heater therein. The control circuit is used to regulate the working temperature and air volume to generate hot air, and the hot air is evenly blown onto the surgical drape through the shunt pipe 53 and the air outlets 54 to realize medium and low temperature hot air circulation drying. The setting of the ventilation fans 55 helps to realize air circulation and improve the drying efficiency.

[0090] As shown Figure 4 In some specific embodiments, as shown, the radiation drying assembly 6 includes: a radiation drying frame 61 fixed to the top of the equipment frame 31, a plurality of ceramic infrared heaters 62 fixed to the inner top of the radiation drying frame 61 for heating by infrared rays, and a controller 63 installed on the top of the radiation drying frame 61 for controlling the plurality of ceramic infrared heaters 62 to achieve heating.

[0091] It should be noted that the radiation drying frame 61 is a rectangular structure with an open bottom, and openings are provided at the bottoms of both sides facing the conveying direction of the conveyor belt 32 to avoid obstacles when the conveyor belt 32 conveys the surgical drape to the inside; the plurality of ceramic infrared heaters 62 are evenly distributed in a linear array on the inner top of the radiation drying frame 61 to provide uniform radiation drying conditions for the surgical drape. The ceramic infrared heater 62 is a device that uses artificial ceramic materials to emit far-infrared radiation for heating. Through the heating effect of long-wave infrared rays, the molecular vibration on the surface of the object to be heated can generate heat energy and increase its temperature; the controller 63 is a control circuit for setting heating parameters to achieve heating, which can be realized by simple programming by those skilled in the art and belongs to the common knowledge in the art. The control method and circuit connection are not explained in detail in this application document and will not be specifically described here.

[0092] Specifically, the radiation drying assembly 6 generates infrared radiation through the ceramic infrared heaters 62. Through the heating effect of long-wave infrared rays, the molecular vibration on the surface of the object to be heated can generate heat energy and increase its temperature, so as to achieve the radiation drying of the surgical drape. The controller 63 is used to set heating parameters and implement the control circuit for heating, and the precise control of the heating process is achieved through programming.

[0093] Based on the ideal embodiments of the present invention as an inspiration, through the above description, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0094] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for preparing and post-processing a surgical drape, characterized in that: The following steps are involved: S1. Freeze the surgical drape to be dried to convert the water from liquid into solid ice crystals; S2, using medium-low temperature hot air circulation to remove surface water and melt the inner ice crystals from the frozen surgical drape; S3, disengage the low-temperature hot air circulation for a period of time to allow the water inside the surgical drape to diffuse to the surface; S4. Use far-infrared radiation and the absorption characteristics of silver ions on specific bands to achieve post-drying processing of surgical drapes.

2. A method for preparing and post-processing a surgical drape according to claim 1, characterized in that: In step S1, the surgical drape is made of a non-woven fabric / composite film material containing a silver ion antibacterial layer.

3. A method for preparing and post-processing a surgical drape according to claim 1, characterized in that: In step S1, the freezing treatment is performed at a temperature of -30 to -50°C for 1 to 5 minutes.

4. A method for post-processing a surgical drape according to claim 1, characterized in that: In step S2, the temperature of the hot air circulation is 40-45°C, the wind speed is 2-4 m / s, and the time is 3-5 min.

5. The method for preparing and post-processing a surgical drape according to claim 1, characterized in that: In the step S3, the time for leaving the low-temperature hot air circulation is 30 to 50 seconds.

6. A method for post-processing a surgical drape according to claim 1, characterized in that: In step S4, the wavelength of the far-infrared radiation is 3-5 μm, the power is 0.5-1.2 W / cm², and the time is 40-80 s.

7. A post-processing automated device for a surgical drape preparation post-processing method according to any one of claims 1 to 6, characterized in that: include: Material placement table, freezing mechanism, material conveying mechanism and transfer robot arm; The material placement table is used to place surgical drapes to be dried; The freezing mechanism is used to freeze the surgical drape to be dried; The material conveying mechanism is used to convey surgical drapes, wherein a hot air drying component for performing medium-low temperature hot air circulation drying on the surgical drapes and a radiation drying component for performing far-infrared radiation drying on the surgical drapes are sequentially installed on the top of the material conveying mechanism; The transfer robot arm is used to transfer the surgical drape between the material placement table, the freezing mechanism and the material conveying mechanism.

8. The post-processing automated equipment for the post-processing method of preparing surgical drapes according to claim 7, characterized in that: The material conveying mechanism includes: an equipment frame, a conveyor belt installed on the equipment frame, and a power source installed on the equipment frame for driving the conveyor belt to realize circumferential rotation; a plurality of rubber strips are fixed to the side of the conveyor belt for reducing the contact area of ​​the surgical drape on the surface of the conveyor belt.

9. The post-processing automated equipment for the post-processing method of preparing surgical drapes according to claim 8, characterized in that: The hot air drying component includes: a hot air drying frame fixed on the top of the equipment rack, a hot air blower installed on the top of the hot air drying frame, and a shunt pipe fixed on the top of the inner side of the hot air drying frame; the side of the shunt pipe is fixed to the output end of the hot air blower, and a plurality of air outlets are fixed on the side facing the top of the conveyor belt; and a plurality of ventilation fans for air circulation are arranged on the side of the hot air drying frame.

10. The post-processing automated equipment for the post-processing method of preparing surgical drapes according to claim 8, characterized in that: The radiation drying assembly includes: a radiation drying frame fixed on the top of the equipment rack, a plurality of ceramic infrared heaters fixed on the inner top of the radiation drying frame for heating by infrared rays, and a controller installed on the top of the radiation drying frame for controlling the plurality of ceramic infrared heaters to achieve heating.

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