Anti-fog cleaning heat shrinkable film and preparation method and application thereof

Abstract

The present invention provides an anti-fog cleaning heat shrinkable film and its preparation method and application. In parts by weight, the materials of the anti-fog cleaning heat shrinkable film include 50 to 80 parts of safe heat shrinkable structural resin, 10 to 30 parts of safe water-absorbing resin, 1 to 10 parts of safe edible anti-fog surfactant and 0.1 to 1 parts of safe barrier nanomaterial. In the present invention, the anti-fog cleaning heat shrinkable film is compounded with a specific content of safe heat shrinkable structural resin, safe water-absorbing resin, safe edible anti-fog surfactant and safe barrier nanomaterial, so that the anti-fog cleaning heat shrinkable film has high safety, high anti-fog property and anti-fog durability, and is easy to clean. The anti-fog cleaning heat shrinkable film provided by the present invention has a wide range of applications, especially in the field of medical endoscopes, and solves the problem of frequent removal of endoscopes due to fogging during surgery; in addition, the anti-fog cleaning heat shrinkable film has a heat shrinking function, can be wrapped on the surface of the endoscope, and is not easy to fall off.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-fog materials, and in particular relates to an anti-fog cleaning heat shrinkable film and a preparation method and application thereof. Background Art

[0002] Transparent substrates such as glass and transparent plastics will cause water vapor in the air to condense on the surface of the substrate due to changes in internal and external temperature or humidity during use, resulting in fogging. There are many situations in daily life where fogging may occur, such as car window glass, helmet lenses or goggles, which are prone to fogging and affect the user's vision, causing great inconvenience in daily life.

[0003] In addition, fogging is often encountered in the medical field. For example, in minimally invasive surgery, auxiliary tools such as endoscopes are often used. Endoscopes, including endoscopes and laparoscopes, are widely used in the medical field because of their good treatment effects, small wounds, and fast recovery. However, due to the special use environment of the endoscope, that is, it needs to be used in the human body, and the human body has a certain temperature and humidity, which causes the endoscope to easily fog, interfering with the operation; in addition, during the operation, stains such as blood are also very easy to contaminate the lens, which requires the endoscope to be frequently taken out, cleaned, and the temperature difference eliminated. This process is not only time-consuming and labor-intensive, but also adds certain risks to the operation. In addition, the commonly used methods for eliminating temperature differences and cleaning in clinical practice include preheating the lens with hot water, wiping the greater omentum with tissue, wiping with iodine, etc., but the method is short-lived and the cleaning is not thorough, so it is still necessary to seek more efficient anti-fogging materials for use in endoscopes to improve surgical efficiency.

[0004] In the prior art, endoscope antifogging agents and disinfectants are often used, which are applied to the surface of the endoscope to achieve an antifogging effect; for example, CN115353860A discloses a medical endoscope antifogging agent, including a surfactant, a thickener, a wetting agent, a preservative, and a solvent, and each component is a food-grade material, which is used to solve the problem that there is currently no suitable endoscope defogger suitable for surgery. However, the antifogging performance and easy-to-clean performance of the antifogging agent need to be further improved, and the antifogging agent is only applied to the surface of the endoscope. As time goes by, the antifogging agent is easy to fall off, and the antifogging durability is low.

[0005] Therefore, it is a technical problem to be solved urgently in the art to develop a high-safety, good anti-fog performance, easy to clean, not easy to fall off, and highly transparent anti-fog cleaning heat shrinkable film. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an anti-fog cleaning heat shrink film and its preparation method and application. The anti-fog cleaning heat shrink film is compounded with a specific content of a safe heat shrinkable structural resin, a safe water-absorbing resin, a safe edible anti-fog surfactant and a safe barrier nanomaterial, so that the anti-fog cleaning heat shrink film is not only highly safe and non-irritating to the human body, but also has excellent anti-fog performance, high anti-fog durability, high transparency and easy cleaning. In the present invention, the anti-fog cleaning film has a wide range of applications and can be applied to various fields, especially in the field of medical endoscopes. Because of its high safety and good anti-fog performance, it solves the problem of frequent removal of endoscopes due to fogging of endoscopes during surgery, greatly improving surgical efficiency; and the anti-fog cleaning heat shrink film has a heat shrink function, can be firmly wrapped on the surface of the endoscope, is not easy to fall off, has good stability, and has a long service life.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides an anti-fog cleaning heat shrinkable film, wherein the materials of the anti-fog cleaning heat shrinkable film include, by weight, 50 to 80 parts of a safe heat shrinkable structural resin, 10 to 30 parts of a safe water-absorbing resin, 1 to 10 parts of a safe edible anti-fog surfactant material and 0.1 to 1 part of a safe barrier nanomaterial.

[0009] Since the surfactant materials commonly used in the existing anti-fog technology are divided into two categories, one category has good anti-fog performance, but poor safety and irritation to the human body, and the other category has better safety but poor anti-fog performance. In addition, the anti-fog surfactant materials in the prior art can be used alone as anti-fog agents, or can be used as anti-fog additives mixed with other film materials to prepare anti-fog products; however, when used alone as anti-fog agents, the surfactant materials are easy to fall off and the anti-fog durability is low; and when used as anti-fog additives and mixed with other film materials, the anti-fog effect cannot be fully exerted, and the obtained film material has poor anti-fog effect and low anti-fog durability; therefore, in the present invention, the safe water-absorbing resin has a water-absorbing anti-fog function, and the safe edible anti-fog surfactant has an anti-fog function, is edible, and is highly safe for the human body. , non-irritating; by using the two together, synergistically enhancing the effect, the anti-fog performance of the anti-fog cleaning heat shrinkable film is better and the anti-fog durability is higher, which solves the problem that the anti-fog material in the prior art cannot have both safety and anti-fog performance, and has slightly poor anti-fog property and low anti-fog durability; the safety barrier nanomaterial has a barrier function, which can prevent liquid from penetrating inwardly, and at the same time can prevent the anti-fog material from precipitating and falling off, thereby improving the anti-fog durability of the anti-fog film, and the safety heat-shrinkable structural resin has a heat-shrinking function, and can be attached to the surface of the product that needs to have an anti-fog function after simple heat treatment, and is not easy to fall off.

[0010] In the present invention, the anti-fog cleaning heat shrink film is particularly suitable for medical endoscopes due to its high safety and anti-fog performance; due to the presence of safety barrier nanomaterials, body fluids are prevented from penetrating into the surface of the endoscope during surgery, polluting and corroding the lens, and causing the lens clarity to deteriorate, and the anti-fog cleaning heat shrink film can be firmly adhered to the surface of the endoscope after a simple heat treatment, so that the film is not easy to fall off, and the anti-fog cleaning heat shrink film is adhered to the surface of the endoscope through the mutual cooperation and coordinated use of the various components through the heat treatment. After entering the human body, the surface of the endoscope does not fog, and the clarity is high, the anti-fog durability is high, it is easy to clean, not easy to fall off, has good stability, high safety, and no irritation to the human body, which greatly improves the surgical efficiency.

[0011] Preferably, the material of the anti-fog cleaning heat shrinkable film includes 50 to 80 parts of a safety heat shrinkable structural resin, by weight, for example, 52 parts, 54 parts, 56 parts, 58 parts, 60 parts, 62 parts, 64 parts, 66 parts, 68 parts, 70 parts, 72 parts, 74 parts, 76 parts, 78 parts, etc.

[0012] Preferably, the material of the anti-fog cleaning heat shrinkable film includes 10 to 30 parts of a safe water-absorbing resin, by weight, for example, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, etc.

[0013] In the present invention, when the content of the safety water-absorbing resin is within a specific range, the anti-fog performance of the anti-fog cleaning heat shrinkable film is better, especially when used in a medical endoscope, it can fit more closely with the endoscope without problems such as wrinkles and deformation, and is not easy to fall off; if the amount of the safety water-absorbing resin is too much, the mechanical strength of the film will be reduced and wrinkles and deformation will easily occur, affecting the use time and surgical efficiency; if the amount of the safety water-absorbing resin is too little, the anti-fog performance of the film will deteriorate, which will also affect the surgical efficiency.

[0014] Preferably, the material of the anti-fog cleaning heat shrinkable film includes 1 to 10 parts of safe, edible anti-fog surfactant materials, by weight, for example, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts, 8.5 parts, 9 parts, 9.5 parts, etc.

[0015] In the present invention, the safe edible anti-fog surfactant has better anti-fog performance, clearer vision and higher efficiency within a specific content range; if the content of the safe edible anti-fog surfactant is too much, it is easy to cause the anti-fog material to seep out, causing oily substances to appear on the surface of the film or turn it white, resulting in unclear vision and affecting the use efficiency; if the content of the safe edible anti-fog surfactant is too little, the anti-fog performance of the film will deteriorate.

[0016] Preferably, in parts by weight, the material of the anti-fog cleaning heat shrinkable film includes 0.1 to 1 parts of safety barrier nanomaterials, for example, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, 0.5 parts, 0.55 parts, 0.6 parts, 0.65 parts, 0.7 parts, 0.75 parts, 0.8 parts, 0.85 parts, 0.9 parts, 0.95 parts, etc.

[0017] In the present invention, the content of the safety barrier nanomaterial is within a specific range, which can not only ensure the clarity of the anti-fog cleaning heat shrink film, but also ensure that it has a certain barrier effect; if the content of the safety barrier nanomaterial is too much, the transparency of the film will deteriorate, and if the amount is too much, the barrier effect will be too strong, and the surfactant material will be prevented from seeping out to prevent fogging, thereby reducing the anti-fog performance; if the content of the safety barrier nanomaterial is too small, the barrier effect is poor, which can easily lead to the seepage of the anti-fog material, thereby leading to poor anti-fog durability; especially when applied to medical endoscopes, the poor barrier effect can easily lead to external body fluids penetrating into the surface of the endoscope, contaminating and corroding the lens, and reducing the service life of the endoscope lens.

[0018] Preferably, the safety heat-shrinkable structural resin includes at least one of heat-shrinkable polyethylene resin, heat-shrinkable polyvinyl chloride resin, heat-shrinkable polyester resin or heat-shrinkable polypropylene resin.

[0019] Preferably, the safe water-absorbing resin includes at least one of polyacrylamide, polyvinyl alcohol, polymethylpyrrolidone, polyethylene glycol, polyethylene glycol acrylate, sodium polyacrylate or polyvinyl butyral.

[0020] Preferably, the safe edible anti-fog surfactant material includes at least one of food-grade Span series, food-grade Tween series, food-grade glyceryl monostearate, food-grade fatty acid sucrose polyester or food-grade silicone.

[0021] Preferably, the safe edible anti-fog surfactant material includes at least one of glycerol fatty acid esters, sucrose fatty acid esters, soybean lecithin, acetic acid, tartaric acid, diacetyltartaric acid, diglycerides, citrates, polyglycerol fatty acids, ricinoleic acid, stearoyl citric acid, tartrates, calcium stearoyl lactylate, sodium stearoyl lactylate, sodium stearoyl fumarate, sorbitan fatty acid esters, polyoxyethylene 20 stearate, polyoxyethylene 40 stearate, sodium alginate, sodium pectate or chitosan water-soluble protein.

[0022] Preferably, the safety barrier nanomaterial comprises at least one of graphene, graphene oxide or zirconium phosphate;

[0023] Preferably, the sheet diameter of the safety barrier nanomaterial is 100-2000nm, for example, it can be 150nm, 200nm, 250nm, 300nm, 350nm, 400nm, 450nm, 500nm, 550nm, 600nm, 650nm, 700nm, 750nm, 800nm, 850nm, 900nm, 950nm, 1000nm, 1100nm, 1200nm, 1300nm, 1400nm, 1500nm, 1600nm, 1700nm, 1800nm, 1900nm, etc.

[0024] In the present invention, the sheet diameter of the safety barrier nanomaterial is within a specific range, and the barrier effect is moderate, so that the anti-fog cleaning heat shrink film has high transparency and better anti-fog effect; if the sheet diameter is too small, the barrier effect is poor, and the anti-fog material is easy to seep out, which leads to poor anti-fog durability; at the same time, the barrier effect is poor, which easily leads to external liquid penetrating into the interior, affecting the use effect; if the sheet diameter is too large, the transparency of the anti-fog cleaning heat shrink film is poor, and at the same time, the sheet diameter is too large, the barrier effect is too strong, which prevents the surfactant from seeping out, thereby causing the anti-fog performance to decrease.

[0025] In a second aspect, the present invention provides a method for preparing the anti-fog cleaning heat shrinkable film according to the first aspect, the preparation method comprising the following steps:

[0026] According to the formula, the safe heat-shrinkable structural resin, the safe water-absorbing resin, the safe edible anti-fog surfactant material and the safe barrier nanomaterial are mixed, extruded and blown to obtain the anti-fog clean heat-shrinkable film.

[0027] Preferably, the mixing temperature is 120-180°C, for example, 130°C, 140°C, 150°C, 160°C, 170°C, etc.; the extrusion temperature is 180-220°C, for example, 190°C, 200°C, 210°C, 220°C, etc.

[0028] Preferably, the inflation ratio is 1:(3-10), for example, it can be 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, etc.

[0029] Preferably, the inflation step further includes cooling, shaping and rolling.

[0030] In a third aspect, the present invention provides an application of the anti-fog cleaning heat shrinkable film as described in the first aspect in an anti-fog scenario.

[0031] Preferably, the anti-fog cleaning heat shrinkable film is used in the fields of medical endoscopes, glasses, automobile glass, optical devices or greenhouse materials.

[0032] Preferably, the anti-fog cleaning heat shrinkable film is particularly suitable for medical endoscopes.

[0033] Preferably, the medical endoscope includes at least one of a laparoscope, a choledochoscope, a gastroscope, a colonoscope, a cystoscope, a laryngoscope, a bronchoscope or a thoracoscope.

[0034] Preferably, the anti-fog cleaning heat shrinkable film is coated on the surface of the medical endoscope after heat treatment.

[0035] The anti-fog products in the prior art are mostly prepared by applying anti-fog materials on the surface of the product or pasting anti-fog films on the surface of the product. However, in both methods, the anti-fog materials are easy to fall off, resulting in the product having no anti-fog function and low anti-fog durability. In the present invention, the anti-fog cleaning heat shrinkable film can be firmly wrapped on the surface of the product after a simple heat treatment (such as treatment with a hair dryer, an oven, etc.), is not easy to fall off, has good stability, and improves the anti-fog durability and service life of the product.

[0036] The anti-fog cleaning heat shrinkable film provided by the present invention can be firmly wrapped on the surface of the product after a simple heat treatment due to the presence of the safe heat shrinkable structural resin, and is especially used for medical endoscopes. When entering the human body, the safe water-absorbing resin and the safe edible anti-fog surfactant cooperate with each other to synergistically enhance the effect, so that the water on the surface of the film is moistened and diffused, thereby playing an anti-fog effect, without fogging, and with high anti-fog durability and good safety; combined with the barrier function of the safe barrier nanomaterial, it can prevent the surfactant from penetrating to the outside in large quantities, ensure the durability of the anti-fog film, and reduce the precipitation of the surfactant to further avoid unnecessary safety problems; on the other hand, it can also prevent external liquids from penetrating inwards, prevent body fluids from contaminating and corroding the lens, and extend the service life of the endoscope lens.

[0037] The numerical range described in the present invention not only includes the point values ​​listed above, but also includes any point values ​​between the above numerical ranges that are not listed. Due to space limitations and for the sake of simplicity, the present invention no longer exhaustively lists the specific point values ​​included in the range.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] (1) The anti-fog cleaning heat shrinkable film provided by the present invention is made of materials that are all highly safe or edible, so that the anti-fog cleaning heat shrinkable film is safe and non-irritating to the human body; and through the mutual cooperation and synergistic effect of various components, the anti-fog cleaning heat shrinkable film has a high anti-fog grade and anti-fog durability, and is easy to clean;

[0040] (2) The anti-fog cleaning heat shrinkable film provided by the present invention can be heat-shrunk and attached to the surface of the product that needs to have an anti-fog function after a simple heat treatment. It has good stability, is not easy to fall off, and has a long service life;

[0041] (3) The anti-fog cleaning heat shrink film provided by the present invention is particularly suitable for medical endoscopes because of its high safety, excellent anti-fog performance, and not easy to fall off. It avoids the problem of frequent removal of the endoscope due to fogging during surgery, thereby improving surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is an anti-fog effect diagram of the anti-fog cleaning heat shrinkable film provided in Example 1 of the present invention;

[0043] Figure 2 This is an anti-fog effect diagram of the anti-fog cleaning heat shrinkable film provided in Example 2 of the present invention;

[0044] Figure 3 This is an anti-fog effect diagram of the anti-fog cleaning heat shrinkable film provided in Example 3 of the present invention;

[0045] Figure 4 This is an anti-fog effect diagram of the anti-fog cleaning heat shrinkable film provided in Example 4 of the present invention;

[0046] Figure 5 This is an anti-fog effect diagram of the anti-fog cleaning heat shrinkable film provided in Example 5 of the present invention;

[0047] Figure 6 This is an anti-fog effect diagram of the anti-fog cleaning heat shrinkable film provided in Example 6 of the present invention;

[0048] Figure 7 This is an anti-fog effect diagram of the anti-fog cleaning heat shrinkable film provided in Comparative Example 1 of the present invention;

[0049] Figure 8 This is an anti-fog effect diagram of the anti-fog cleaning heat shrinkable film provided in Comparative Example 2 of the present invention;

[0050] Fig. 9 This is an anti-fog effect diagram of the anti-fog cleaning heat shrinkable film provided in Comparative Example 3 of the present invention;

[0051] Fig.10This is an anti-fog effect diagram of the anti-fog cleaning heat shrinkable film provided in Comparative Example 4 of the present invention;

[0052] Fig.11 This is an anti-fog effect diagram of the anti-fog cleaning heat shrinkable film provided in Comparative Example 5 of the present invention;

[0053] Fig.12 This is an anti-fog effect diagram of the anti-fog cleaning heat shrinkable film provided in Comparative Example 6 of the present invention;

[0054] Fig.13 This is a diagram showing the anti-fog effect of the anti-fog cleaning heat shrinkable film provided in Example 1 of the present invention after immersion;

[0055] Fig.14 This is a diagram showing the anti-fog effect of the anti-fog cleaning heat shrinkable film after immersion provided in Example 5 of the present invention;

[0056] Fig.15 This is a diagram showing the anti-fog effect of the anti-fog cleaning heat shrinkable film after immersion provided in Example 6 of the present invention;

[0057] Fig.16 This is a diagram showing the anti-fog effect of the anti-fog cleaning heat shrinkable film provided in Comparative Example 1 of the present invention after immersion;

[0058] Fig.17 This is a diagram showing the anti-fog effect of the anti-fog cleaning heat shrinkable film provided in Comparative Example 3 of the present invention after immersion;

[0059] Fig.18 This is a diagram showing the anti-fog effect of the anti-fog cleaning heat shrinkable film provided in Comparative Example 4 of the present invention after immersion;

[0060] Fig.19 This is a diagram showing the anti-fog effect of the anti-fog cleaning heat shrinkable film provided in Comparative Example 5 of the present invention after immersion;

[0061] Fig. 20 This is a diagram of the device of the present invention in which the anti-fog cleaning heat shrink film is wrapped on the surface of the endoscope after heat treatment and placed in the abdominal surgery simulation trainer;

[0062] Among them, A is an endoscope simulator wrapped in a heat shrink film after heat treatment; B is a lens enlarged view of the endoscope simulator wrapped in a heat shrink film after heat treatment; C is an abdominal surgery simulation trainer; and D is a human body model. DETAILED DESCRIPTION

[0063] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0064] The materials used in the present invention are as follows:

[0065] Polyethylene resin: PetroChina Co., Ltd., brand: 2426H

[0066] Polyvinyl chloride resin: Sinopec, brand: PVC S-1000

[0067] PET resin: DuPont, USA, brand: FR515

[0068] Polyacrylamide: Shanghai Aladdin Biochemical Technology Co., Ltd. Brand: P108471

[0069] Polyethylene glycol acrylate: Shanghai Aladdin Biochemical Technology Co., Ltd. Brand: P136232

[0070] Polyvinyl butyral: Sekisui Chemical, Japan, brand: PVB BM-1

[0071] Glycerol fatty acid ester: Shandong Yousuo Chemical Technology Co., Ltd.

[0072] Sorbitan fatty acid esters: New Future Biological Products Chengdu Co., Ltd.

[0073] Zirconium phosphate: Mianzhu Yaolong Chemical Co., Ltd.

[0074] Graphene: Shandong Chongshan Optoelectronic Materials Co., Ltd.

[0075] Example 1

[0076] The present embodiment provides an anti-fog cleaning heat shrinkable film. The materials of the anti-fog cleaning heat shrinkable film include, by weight, 70 parts of safe heat shrinkable structural resin polyethylene resin, 24 parts of safe water-absorbing resin polyacrylamide, 5.5 parts of safe edible anti-fog surfactant material glycerol fatty acid ester and 0.5 parts of safe barrier nanomaterial zirconium phosphate.

[0077] This embodiment provides a method for preparing an anti-fog cleaning heat shrinkable film, which specifically includes the following steps:

[0078] According to the formula, polyethylene resin, polyacrylamide, glycerol fatty acid ester and zirconium phosphate are mixed in a twin-screw extruder at 160° C., extruded at 200° C., inflated at a blowing ratio of 1:5, cooled and shaped, and then rolled up to obtain the anti-fog cleaning heat shrinkable film.

[0079] Example 2

[0080] The present embodiment provides an anti-fog cleaning heat shrinkable film. The materials of the anti-fog cleaning heat shrinkable film include, by weight, 62 parts of safe heat shrinkable structural resin polyvinyl chloride resin, 28 parts of safe water-absorbing resin polyethylene glycol acrylate, 9.2 parts of safe edible anti-fog surfactant material sorbitan fatty acid ester and 0.8 parts of safe barrier nanomaterial graphene.

[0081] This embodiment provides a method for preparing an anti-fog cleaning heat shrinkable film, and the specific steps are the same as those in Embodiment 1.

[0082] Example 3

[0083] The present embodiment provides an anti-fog cleaning heat shrinkable film. The materials of the anti-fog cleaning heat shrinkable film include, by weight, 80 parts of safe heat shrinkable structural resin PET resin, 16 parts of safe water-absorbing resin polyvinyl butyral ester, 3.6 parts of safe edible anti-fog surfactant material tartrate, and 0.4 parts of safe barrier nanomaterial zirconium phosphate.

[0084] This embodiment provides a method for preparing an anti-fog cleaning heat shrinkable film, and the specific steps are the same as those in Embodiment 1.

[0085] Example 4

[0086] The present embodiment provides an anti-fog cleaning heat shrinkable film. The materials of the anti-fog cleaning heat shrinkable film include, by weight, 59 parts of safe heat shrinkable structural resin polyethylene resin, 30 parts of safe water-absorbing resin polyacrylamide, 10 parts of safe edible anti-fog surfactant material glycerol fatty acid ester and 1 part of safe barrier nanomaterial zirconium phosphate.

[0087] This embodiment provides a method for preparing an anti-fog cleaning heat shrinkable film, and the specific steps are the same as those in Embodiment 1.

[0088] Example 5

[0089] This embodiment provides an anti-fog cleaning heat shrinkable film, which is different from the embodiment 1 only in that the diameter of the zirconium phosphate sheet is 100 nm, and the other components, dosage and preparation method are the same as those in the embodiment 1.

[0090] Example 6

[0091] This embodiment provides an anti-fog cleaning heat shrinkable film, which is different from the embodiment 1 only in that the diameter of the zirconium phosphate sheet is 3000 nm, and the other components, dosage and preparation method are the same as those in the embodiment 1.

[0092] Comparative Example 1

[0093] This comparative example provides an anti-fog cleaning heat shrinkable film, which is different from Example 1 only in that the content of the polyacrylamide is 5.5 parts, the content of the glycerol fatty acid ester is 24 parts, and the other components, amounts and preparation methods are the same as those in Example 1.

[0094] Comparative Example 2

[0095] This comparative example provides an anti-fog cleaning heat shrinkable film, which is different from Example 1 only in that the content of the polyacrylamide is 35 parts, the content of the glycerol fatty acid ester is 0.5 parts, and the other components, amounts and preparation methods are the same as those in Example 1.

[0096] Comparative Example 3

[0097] This comparative example provides an anti-fog cleaning heat shrinkable film, which is different from Example 1 only in that the total amount of polyacrylamide and glycerol fatty acid ester remains unchanged, there is no polyacrylamide, and other components, amounts and preparation methods are the same as those in Example 1.

[0098] Comparative Example 4

[0099] This comparative example provides an anti-fog cleaning heat shrinkable film, which is different from Example 1 only in that the total amount of polyacrylamide and glycerol fatty acid ester remains unchanged, glycerol fatty acid ester is not included, and other components, amounts and preparation methods are the same as those in Example 1.

[0100] Comparative Example 5

[0101] This comparative example provides an anti-fog cleaning heat shrinkable film, which is different from Example 1 only in that the content of zirconium phosphate is 2 parts, and other components, dosages and preparation methods are the same as those in Example 1.

[0102] Comparative Example 6

[0103] This comparative example provides an anti-fog cleaning heat shrinkable film. The materials of the anti-fog cleaning heat shrinkable film include, by weight, 40 parts of safe heat shrinkable structural resin polyethylene resin, 40 parts of safe water-absorbing resin polyacrylamide, 15 parts of safe edible anti-fog surfactant glycerol fatty acid ester and 5 parts of safe barrier nanomaterial zirconium phosphate. The preparation method is the same as that in Example 1.

[0104] Performance Testing

[0105] (1) Anti-fog performance test: The sample film is placed on an endoscope simulator and heat-treated to completely cover the endoscope; the lens treated with heat shrink film is placed in a laparoscopic surgery simulator, and the ambient temperature in the simulator is controlled at 40°C and the humidity is 95%. After 30 seconds, the transmitted image is observed to see if it is clear;

[0106] (2) Anti-fog durability test: Place the lens treated with heat shrink film in a laparoscopic surgery simulator, and control the ambient temperature in the simulator to 40°C and the humidity to 95%. After the lens is placed in the simulator for 30 minutes, observe whether the transmitted image is clear.

[0107] (3) Anti-fog performance test after immersion: The lens treated with heat shrink film was soaked in physiological saline for 1 hour, and then placed in a laparoscopic surgery simulator. The ambient temperature in the simulator was controlled at 40°C and the humidity was 95%. The lens was placed in the simulator for 30 seconds, and the fogging of the sample and whether the surface turned white were observed.

[0108] Anti-fog level: Level 1 represents completely transparent without water droplets; Level 2 represents good transparency, with a small amount of uneven large water droplets, and the water droplet area does not exceed 5%; Level 3 represents basically transparent, with more water droplets, and the water droplet area does not exceed 30%; Level 4 represents translucent, with many small water droplets, and the water droplet area is more than 50%; Level 5 represents completely opaque;

[0109] (4) Easy to clean: Dip the endoscope head treated with anti-fog clean heat shrink film into melted butter, leave it for 5 minutes, then rinse it with clean water for 5 minutes, and observe whether there is any residual grease on the surface of the endoscope;

[0110] Among them, level 1 means no residual grease on the surface, level 2 means a small amount of residual grease, and level 3 means that the solidified grease is almost impossible to wash off;

[0111] (5) Transparency: Tested with a haze meter in accordance with GB / T 2410-2008;

[0112] (6) Barrier property: After the endoscope head wrapped with anti-fog clean heat shrink film is immersed in physiological saline for 1 hour, the film is peeled off from the endoscope to observe whether there is leakage between the interlayers.

[0113] In the present invention, the anti-fog cleaning heat shrink film is installed on the medical laparoscope simulation lens and heat-shrunk. The treated lens is placed in a laparoscopic surgery simulation trainer, and the ambient temperature in the simulator is controlled to be 40°C and the humidity is 95%. The anti-fog performance is judged by the clarity of the image transmitted by the lens; the schematic diagram of the device is shown in FIG. Fig. 20 shown.

[0114] The specific test results are shown in Table 1:

[0115] Table 1

[0116]

[0117] It can be seen from the above table that the anti-fog and clean heat shrinkable film provided by the present invention is compounded with specific contents of safe heat shrinkable structural resin, safe water-absorbing resin, safe edible anti-fog surfactant and safe barrier nanomaterial, so that the anti-fog and clean heat shrinkable film is not only highly safe and non-irritating to the human body, but also has excellent anti-fog performance and high anti-fog durability, and is particularly suitable for medical endoscopes, avoiding the problem of frequent removal of endoscopes due to fogging of endoscopes during surgery, thereby greatly improving surgical efficiency; and the anti-fog and clean heat shrinkable film is easy to clean, has a heat shrinkage function, can be firmly wrapped on the surface of the endoscope, is not easy to fall off, has good stability, and can be used for a long time.

[0118] It can be seen from Example 1 and the comparative example that, without a specific formulation, the anti-fog cleaning heat shrinkable film has a poor anti-fog effect.

[0119] In summary, the anti-fog cleaning heat shrinkable film obtained by adopting the formula of the present invention is safe and non-irritating to the human body, and has good anti-fog performance, high durability, long service life, easy cleaning, stable product, and wide application field.

[0120] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. An anti-fog cleaning heat shrinkable film for medical endoscopes, characterized in that: In parts by weight, the materials of the anti-fog cleaning heat shrinkable film include 50-80 parts of safe heat shrinkable structural resin, 10-30 parts of safe water-absorbing resin, 1-10 parts of safe edible anti-fog surfactant material and 0.1-1 parts of safe barrier nanomaterial; The safe water-absorbing resin is polyacrylamide, the safe heat-shrinkable structural resin is polyethylene resin, and the safe edible anti-fog surface active material is glycerol fatty acid ester; or The safe water-absorbing resin is polyethylene glycol acrylate, the safe heat-shrinkable structural resin is polyvinyl chloride resin, and the safe edible anti-fog surface active material is sorbitan fatty acid ester; or The safe water-absorbing resin is polyvinyl butyral ester, the safe heat-shrinkable structural resin is PET resin, and the safe edible anti-fog surfactant is tartrate; The sheet diameter of the safety barrier nanomaterial is 200-2000 nm; The safety barrier nanomaterial includes at least one of graphene, graphene oxide or zirconium phosphate; The anti-fog cleaning heat shrinkable film is prepared by the following method, and the preparation method comprises the following steps: According to the formula, a safe heat-shrinkable structural resin, a safe water-absorbing resin, a safe edible anti-fog surfactant material and a safe barrier nanomaterial are mixed, extruded and inflated to obtain the anti-fog clean heat-shrinkable film; The mixing temperature is 120-180°C, and the extrusion temperature is 180-220°C; The inflation ratio is 1:(3-10).

2. A method for preparing the anti-fog cleaning heat shrinkable film for medical endoscopes according to claim 1, characterized in that: The preparation method comprises the following steps: According to the formula, a safe heat-shrinkable structural resin, a safe water-absorbing resin, a safe edible anti-fog surfactant material and a safe barrier nanomaterial are mixed, extruded and inflated to obtain the anti-fog clean heat-shrinkable film; The mixing temperature is 120-180°C, and the extrusion temperature is 180-220°C; The inflation ratio is 1:(3-10).

3. The preparation method according to claim 2, characterized in that: After the inflation, the process also includes the steps of cooling, shaping and rolling.

4. An application of the anti-fog cleaning heat shrinkable film for medical endoscopes as claimed in claim 1 in anti-fog scenarios.

5. According to the use of claim 4, the medical endoscope comprises at least one of a laparoscope, a choledochoscope, a gastroscope, a colonoscope, a cystoscope, a laryngoscope, a bronchoscope or a thoracoscope.

6. The use according to claim 4, wherein the anti-fog cleaning heat shrinkable film is coated on the surface of the medical endoscope after heat treatment.

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