Medical reagent-resistant plastic wall covering and manufacturing method therefor

Abstract

Disclosed in the present invention is a medical reagent-resistant plastic wall covering, comprising a substrate layer, a medical reagent-resistant PVC layer, a texture layer, a pattern layer and a medical reagent-resistant reinforcing layer. The provision of the medical reagent-resistant PVC layer and the medical reagent-resistant reinforcing layer endows the plastic wall covering with excellent resistance to alcohol, iodophor and peracetic acid, so that when the plastic wall covering is accidentally exposed to medical reagents such as alcohol or iodophor, said two layers can effectively protect the inner structure of the plastic wall covering and prevent the surface layer from being damaged by the medical reagents, thereby avoiding accelerated aging of the plastic wall covering and ensuring the service life of the plastic wall covering. Moreover, during cleaning, not only can ordinary cleaning agents be used, but disinfectants can also be used, thus making the cleaning process more convenient and achieving a better cleaning effect.

Description

Resistant Medical Reagent Wall Plastic and Its Preparation Method Technical Field

[0001] This invention relates to the field of wallpaper technology, and in particular to a medical reagent-resistant wall coating and its preparation method. Background Technology

[0002] There are many types of wall decoration materials, such as inorganic decorative materials like natural stone and ceramic tiles; paints; decorative wall panels; decorative wallpaper and wall coverings; and wall PVC materials, all of which can achieve excellent wall decoration effects. Among them, wall PVC materials are made from vinyl as a base material, printed with colorful patterns, and then coated with a wear-resistant layer. They are characterized by their beauty, durability, wide variety of colors and patterns, and colorfastness. Some wall PVC materials are also made with various patterns and textures, giving them a strong sense of texture; they are similar to wallpaper and wall coverings but not the same. Wall PVC materials have wide applications, including but not limited to interior walls in rooms and offices, and are also suitable for places such as medical rooms, wards, and sanatoriums. The rich patterns create a comfortable and warm environment for patients and those under health monitoring, or alleviate anxiety, and also provide some protection for the walls.

[0003] Wallpaper and wall coverings currently offer limited protection against common stains (such as dust, water, and detergents), making their functionality relatively simple. In places like clinics, wards, and sanatoriums, medical reagents such as iodine, alcohol, and peracetic acid are frequently used for local disinfection of patients and those under health monitoring. This inevitably leads to some contamination of the walls. Existing wallpaper and wall coverings are prone to having their wear-resistant protective layer damaged by these medical reagents, thus accelerating the aging of the wall material and ultimately shortening its lifespan. Therefore, it is necessary to research a new technical solution to address these issues. Summary of the Invention

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a medical reagent resistant wall coating and its preparation method, which can effectively solve the problems of existing wall coatings having limited functionality, easy damage to the protective layer when contaminated with medical reagents, and short service life.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A medical reagent-resistant wall coating includes a base layer, a medical reagent-resistant PVC layer, a texture layer, a pattern layer, and a medical reagent-resistant reinforcing layer; the medical reagent-resistant PVC layer is disposed on the surface of the base layer; the texture layer is disposed on the surface of the medical reagent-resistant PVC layer; the pattern layer is disposed on the surface of the texture layer; and the medical reagent-resistant reinforcing layer is disposed on the surface of the pattern layer.

[0007] As a preferred embodiment, the medical reagent resistant reinforcing layer is plasticized from a first medical reagent resistant slurry, which includes PVC resin powder, plasticizer, metal stabilizer, and epoxidized soybean oil; the mass parts are respectively: 80-120 parts of PVC resin powder, 50-70 parts of plasticizer, 2-4 parts of metal stabilizer, and 1-3 parts of epoxidized soybean oil.

[0008] As a preferred embodiment, the medical reagent-resistant PVC layer is plasticized from a second medical reagent-resistant slurry, which includes PVC resin powder, plasticizer, metal stabilizer, epoxidized soybean oil, foaming agent, zinc oxide, and filler; the mass parts are as follows: 80-120 parts of PVC resin powder, 50-70 parts of plasticizer, 2-4 parts of metal stabilizer, 0.5-1.5 parts of epoxidized soybean oil, 3-5 parts of foaming agent, 1-3 parts of zinc oxide, and 60-80 parts of filler.

[0009] As a preferred embodiment, the PVC resin powder is preferably P-450 resin; the metal stabilizer is an organotin stabilizer, a mixture of zinc stearate and calcium stearate, or a mixture of organotin stabilizer and zinc stearate and calcium stearate.

[0010] As a preferred embodiment, the organotin stabilizer is one of methyltin mercaptan, dioctyltin monooctyl maleate, or dibutyltin dilaurate.

[0011] As a preferred embodiment, the foaming agent is AC foaming agent.

[0012] As a preferred embodiment, the filler comprises heavy calcium carbonate and titanium dioxide, wherein the mass ratio of heavy calcium carbonate to titanium dioxide is 10-15:1-2, and the particle size of the heavy calcium carbonate is 400 mesh.

[0013] As a preferred embodiment, the first medical reagent slurry further includes an antimicrobial agent, wherein the antimicrobial agent is present in 2-3 parts by mass.

[0014] As a preferred embodiment, the second medical reagent slurry further includes an antimicrobial agent, wherein the antimicrobial agent is present in 2-3 parts by mass.

[0015] A method for preparing a medical reagent-resistant wall coating includes the following steps:

[0016] S1. Preparation of the first medical reagent slurry premix: First, place the plasticizer, metal stabilizer, and epoxidized soybean oil in a container, then add PVC resin powder to the container and stir evenly to obtain the first medical reagent slurry premix.

[0017] S2. Preparation of the second medical reagent slurry premix: First, plasticizer, metal stabilizer, epoxidized soybean oil, filler, AC powder and zinc oxide are added simultaneously and stirred evenly. Then, PVC resin powder is added to the container and stirred evenly to obtain the second medical reagent slurry premix.

[0018] S3. Antimicrobial agents are added in steps S1 and S2 respectively to form new first medical reagent resistant slurry premix and second medical reagent resistant slurry premix;

[0019] S4: Preparation of the medical reagent resistant PVC layer: The second medical reagent resistant slurry premix obtained in step S2 or S3 above is applied using a coating device. The premix is ​​pumped into the coating device, and the device is controlled to print 250-350 g / m² on the surface of the substrate layer. 2 At room temperature, the molecules of the above-mentioned second medical reagent PVC slurry can flow. When heated to 95-105℃, the PVC resin particles in the premix absorb the plasticizer. When the temperature continues to rise to above 160℃, the plasticization of the slurry is completed.

[0020] S5. Preparation of the texture layer: While still hot, the surface of the medical reagent resistant PVC layer prepared in step S4 is embossed using an embossing device to form a texture layer;

[0021] S6. Preparation of the pattern layer: The texture layer surface obtained in step S5 is printed with a pattern using a printing press to form a pattern layer;

[0022] S7. Preparation of the medical reagent resistant reinforcing layer: The premix obtained in S1 or S3 is printed onto the product after the pattern layer preparation using a printing machine. Specifically, the premix is ​​pumped into the coating device, and the equipment is controlled to operate at a rate of 20 g / m². 2 The printing process involves two printing cycles, with the paste being heated to 95-105℃ and then plasticized at 160℃ or higher.

[0023] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0024] By incorporating a medical reagent-resistant PVC layer and a medical reagent-resistant reinforcing layer, the wall plastic exhibits excellent resistance to alcohol, iodine, and peracetic acid. When accidentally exposed to medical reagents such as alcohol or iodine, it effectively protects the inner structure of the wall plastic, preventing damage to the surface and accelerating aging, thus ensuring its lifespan. Furthermore, it can be cleaned not only with ordinary cleaning agents but also with disinfectant, making the cleaning process more convenient and effective.

[0025] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0026] Figure 1 is a cross-sectional schematic diagram of a preferred embodiment of the present invention.

[0027] Explanation of the labels in the attached diagram: 10, substrate layer; 20, medical reagent resistant PVC layer; 30, texture layer; 40, pattern layer; 50, medical reagent resistant reinforcing layer. Detailed Implementation

[0028] Please refer to Figure 1, which shows the specific structure of a preferred embodiment of the present invention, including a substrate layer 10, a medical reagent resistant PVC layer 20, a texture layer 30, a pattern layer 40, and a medical reagent resistant reinforcing layer 50.

[0029] The medical reagent-resistant PVC layer 20 is disposed on the surface of the substrate layer 10. In this embodiment, the medical reagent-resistant PVC layer is plasticized from a second medical reagent-resistant slurry, which includes PVC resin powder, plasticizer, metal stabilizer, epoxidized soybean oil, foaming agent, zinc oxide, and filler. The mass fractions are as follows: 80-120 parts of PVC resin powder, 50-70 parts of plasticizer, 2-4 parts of metal stabilizer, 0.5-1.5 parts of epoxidized soybean oil, 3-5 parts of foaming agent, 1-3 parts of zinc oxide, and 60-80 parts of filler. Preferably, the mass fractions are as follows: 100 parts of PVC resin powder, 60 parts of plasticizer, 2 parts of metal stabilizer, 1 part of epoxidized soybean oil, 4 parts of foaming agent, 2 parts of zinc oxide, and 68 parts of filler.

[0030] The foaming agent is AC foaming agent. Since the decomposition temperature of AC foaming agent is generally between 190℃ and 205℃, while the plasticizing temperature of slurry is between 160℃ and 180℃, it can be seen that the decomposition temperature of AC foaming agent is much higher than the plasticizing temperature of slurry. In order to facilitate foaming, a small amount of zinc oxide can be added to the slurry to lower the decomposition temperature of AC foaming agent.

[0031] The filler comprises heavy calcium carbonate and titanium dioxide, wherein the mass ratio of heavy calcium carbonate to titanium dioxide is (10-15):(1-2), and the particle size of the heavy calcium carbonate is 400 mesh. The titanium dioxide is selected from R-258, PTA-100, or PTA-120. Preferably, the titanium dioxide is R-258, which undergoes surface treatment using a zirconium-silicon-aluminum-phosphorus multi-element inorganic coating and organic treatment technology. This reduces the contact between titanium dioxide particles, resulting in good dispersibility and low oil absorption. Furthermore, adding this amount of titanium dioxide improves the whiteness of the PVC layer and provides some anti-mildew and antibacterial effects.

[0032] The textured layer 30 is disposed on the surface of the medical reagent resistant PVC layer 20.

[0033] The pattern layer 40 is disposed on the surface of the texture layer 30.

[0034] The medical reagent resistant reinforcing layer 50 is disposed on the surface of the pattern layer 40; in this embodiment, the medical reagent resistant reinforcing layer 10 is plasticized from a first medical reagent resistant slurry, which includes PVC resin powder, plasticizer, metal stabilizer and epoxidized soybean oil; the mass parts are respectively: 80-120 parts of PVC resin powder, 50-70 parts of plasticizer, 2-4 parts of metal stabilizer and 1-3 parts of epoxidized soybean oil.

[0035] The first and second medical reagent resistant slurries also include antimicrobial agents, wherein the antimicrobial agent comprises 2-3 parts by mass. The antimicrobial agent is preferably ACTICIDE PLT. Specifically, the main component of ACTICIDE PLT is 2-n-octyl-4-isothiazolin-3-one, with a boiling point of 304.5±25.0℃, and is a light yellow, transparent, viscous liquid (active ingredient content 20-45%). Its relatively light color means that applying it to the surface of the pattern layer will not affect the pattern's appearance. Based on the amount of antimicrobial agent added in this application, good anti-mildew and antibacterial (Staphylococcus aureus, Escherichia coli) effects can be achieved. Furthermore, at the plasticizing temperature of this application, the antimicrobial agent maintains good thermal stability.

[0036] In this embodiment, the PVC resin powder in the medical reagent resistant PVC layer 20 and the medical reagent resistant reinforcing layer 50 is preferably P-450 resin. Pure polyvinyl chloride resin is a highly polar polymer with strong intermolecular forces. Therefore, the softening temperature and melting temperature of polyvinyl chloride are relatively high, generally requiring 160-210℃ for processing. Polyvinyl chloride molecules contain chlorine substituents, which easily lead to the dehydrochlorination of polyvinyl chloride resin, causing a degradation reaction. In an oxygen-rich atmosphere, the decomposition of polyvinyl chloride is also accelerated, thus affecting its processing. In actual production, additives are generally added to reduce the dehydrochlorination reaction of polyvinyl chloride molecules. For example, heat stabilizers can be added. Various stabilizers are suitable for polyvinyl chloride resin, commonly including basic lead salts (such as tribasic lead sulfate, dibasic lead phosphite), fatty acid soaps (such as barium stearate, copper stearate, lead stearate, etc.), and organotin compounds (such as dibutyltin dilaurate, etc.). These can achieve good stabilization effects. Therefore, specifically, the PVC resin powder is preferably P-450 resin, which has a milky white appearance.

[0037] The metal stabilizer is an organotin stabilizer, a mixture of zinc stearate and calcium stearate, or a mixture of an organotin stabilizer and zinc stearate and calcium stearate. The organotin stabilizer is one of methyltin mercaptan, dioctyltin monooctyl maleate, or dibutyltin dilaurate. When methyltin mercaptan is used, this stabilizer can form a tin salt with the hydrogen chloride released during PVC degradation, achieving the effect of absorbing hydrogen chloride. Additionally, methyltin mercaptan can also replace unstable allyl chloride ions on the PVC chain through its special coordination chemistry, preventing the generation of hydrogen chloride. Zinc stearate has high activity; a small amount added in this formulation can improve the hue of the PVC layer and has significant anti-sulfurization and anti-precipitation characteristics. Furthermore, when the organotin stabilizer is used alone, it can achieve good resistance to alcohol and iodine staining. When the organotin stabilizer is used in combination with zinc stearate and calcium stearate, it has a good synergistic effect and can also achieve good resistance to alcohol and iodine staining.

[0038] Specifically, epoxidized soybean oil, when used in the above-mentioned formulation, not only acts as an auxiliary plasticizer to provide good plasticizing effects for PVC, but also as an auxiliary heat stabilizer to improve the weather resistance and heat resistance of PVC. Since epoxidized soybean oil has poor thermal stability and weather resistance when used alone, when used with zinc stearate and calcium stearate, it can act as an intermediate medium to transfer allyl chloride atoms to the aforementioned metal stabilizers, thus delaying the formation of metal chlorides. This allows for the regeneration of highly active metal stabilizers and delays the formation of metal chlorides that promote the degradation and release of hydrogen chloride. Therefore, the presence of epoxidized soybean oil can improve the internal thermal stability and weather resistance of the metal-stabilized system, meaning that the metal stabilizers and epoxidized soybean oil exert a synergistic effect.

[0039] The plasticizer is DOTP and / or TXIB. When DOTP is used as a plasticizer, its physical and mechanical properties are better because the DOTP molecule has a linear symmetrical structure. When TXIB is used as a plasticizer, it is more environmentally friendly.

[0040] The preparation method of this embodiment is described in detail below:

[0041] S1. Preparation of the first medical reagent slurry premix: First, place the plasticizer, metal stabilizer, and epoxidized soybean oil in a container, then add PVC resin powder to the container and stir evenly to obtain the first medical reagent slurry premix.

[0042] S2. Preparation of the second medical reagent slurry premix: First, plasticizer, metal stabilizer, epoxidized soybean oil, filler, AC powder and zinc oxide are added simultaneously and stirred evenly. Then, PVC resin powder is added to the container and stirred evenly to obtain the second medical reagent slurry premix.

[0043] S3. Antimicrobial agents are added in steps S1 and S2 respectively to form new first medical reagent resistant slurry premix and second medical reagent resistant slurry premix;

[0044] S4: Preparation of the medical reagent resistant PVC layer: The second medical reagent resistant slurry premix obtained in step S2 or S3 above is applied using a coating device. The premix is ​​pumped into the coating device, and the device is controlled to print 250-350 g / m² on the surface of the substrate layer. 2 At room temperature, the molecules of the above-mentioned second medical reagent PVC slurry can flow. When heated to 95-105℃, the PVC resin particles in the premix absorb the plasticizer. When the temperature continues to rise to above 160℃, the plasticization of the slurry is completed.

[0045] S5. Preparation of the texture layer: While still hot, the surface of the medical reagent resistant PVC layer prepared in step S4 is embossed using an embossing device to form a texture layer;

[0046] S6. Preparation of the pattern layer: The texture layer surface obtained in step S5 is printed with a pattern using a printing press to form a pattern layer;

[0047] S7. Preparation of the medical reagent resistant reinforcing layer: The premix obtained in S1 or S3 is printed onto the product after the pattern layer preparation using a printing machine. Specifically, the premix obtained in S1 or S3 is pumped into the coating device, and the equipment is controlled to operate at a rate of 20 g / m². 2 The printing process involves two printing cycles, with the paste being heated to 95-105℃ and then plasticized at 160℃ or higher.

[0048] In the preparation of the first medical reagent slurry, a suitable temperature can achieve a good transparency effect. As the temperature increases, the transparency of the slurry first increases and then decreases. When the temperature is too high, the PVC resin degrades and changes color, reducing its transparency. In order to further ensure the presentation of the finished pattern, the amount of medical reagent slurry used needs to be controlled to obtain a finished product with better presentation effect.

[0049] Test methods for examples and comparative examples:

[0050] 1. Appearance: Tested visually.

[0051] 2. Lightfastness: As per Appendix A of GB / T 34844-2017.

[0052] 3. Heavy metal element content test: Barium, cadmium, chromium, lead, arsenic, mercury, selenium and antimony were tested according to Appendix A of GB 18585-2023.

[0053] 4. Iodine resistance test: Cut four samples of suitable size from similar parts of the roll material, such as 50mm*50mm. Use a dropper to drop one drop of 0.5% iodine reagent onto the front of the sample and let it stand for 4 hours. Then wipe off the residual iodine with a damp white cotton cloth. Repeat 2-3 times until the cotton cloth is no longer obviously stained. Then let the sample stand for 72 hours and use a colorimeter to test the ΔE value of the sample after standing and the original sample.

[0054] 5. Reagent Resistance Tests: Summary of test methods for alcohol resistance, peracetic acid resistance, and 84 disinfectant resistance: Cut three 50mm*50mm samples from the roll material, flatten the samples, and place them in a petri dish. Add 0.5-1ml of the test reagent to the center of the sample. After adding the reagent, cover the sample surface with a polypropylene film, press it evenly, and cover the petri dish with the petri dish lid. Place the sample in a cool place for 24 hours. After removing the sample, use a white cotton cloth to re-dip the test reagent and wipe the center of the sample back and forth 50 times. Observe the color change under sufficient indoor light.

[0055] (1) Alcohol resistance test: The test reagent is 75% alcohol;

[0056] (2) Peracetic acid resistance test: The test reagent is 0.1% peracetic acid reagent;

[0057] (3) Resistance to 84 disinfectant: Prepare the test reagent according to the usage ratio (by mass ratio) of 84 disinfectant stock solution: water = 1:9.

[0058] 6. Anti-mildew performance: As per ASTM G21-15;

[0059] 7. Antibacterial properties: Tested according to JIS Z 2801:2012, using Staphylococcus aureus and Escherichia coli strains.

[0060] Materials used in the examples and comparative examples.

[0061] The specific dosages of the medical reagent-resistant PVC layer and the medical reagent-resistant reinforcing layer are shown in Table 1:

[0062] Table 1

[0063] The materials and related grades used in Table 1 are as follows:

[0064] PVC resin powder: Grade P-450 resin;

[0065] Plasticizers: DOTP and TXIB;

[0066] Metal type stabilizer 1: Thiol methyltin;

[0067] Metal type stabilizer 2: dibutyltin maleate;

[0068] Metal type stabilizer 3: calcium stearate;

[0069] Metal type stabilizer 4: Zinc stearate;

[0070] Metal type stabilizer 5: Copper stearate;

[0071] Other stabilizer 1: Triisodecyl phosphite;

[0072] Filler: The filler is in a mass ratio of heavy calcium carbonate to titanium dioxide of 10:1, with a particle size of 400 mesh for the heavy calcium carbonate; the titanium dioxide is rutile titanium dioxide R-258.

[0073] Foaming agent: AC foaming agent.

[0074] The test results of the examples and comparative examples are shown in Tables 2 and 3:

[0075] Table 2

[0076] Table 3

[0077] In Tables 1 and 2, Examples 1-8 and Comparative Examples 1-2 are studies on medical reagent-resistant reinforcing layers, and Examples 9-12 are studies on medical reagent-resistant PVC layers.

[0078] First, through the comparison of Example 4 with Comparative Examples 1 and 2 in Tables 1 and 2, the differences in the use of stabilizers affect the fading performance and iodine resistance of the layer structure.

[0079] Secondly, regarding the explanation of anti-iodine staining, iodine is generally an amorphous complex formed by iodine with a surfactant as a carrier and a solubilizer. Specifically, the components of iodine form a complex through intermolecular affinity or electrostatic attraction. Iodine is located in the micelles formed by the surfactant and can gradually release free iodine in water. Therefore, when iodine is dropped onto the surface of the wall coating for a period of time, a small portion of the iodine will adhere to the surface of the medical reagent resistant reinforcing layer. When wiped with water, some of the iodine on the wall coating surface is removed by water, but some cannot be removed by water or detergent, so a brown mark remains on the wall coating surface. At this time, the remaining metallic stabilizer in the medical reagent resistant reinforcing layer will react with the residual iodine in a humid environment, causing the residual iodine on the surface to fade. Generally, organotin stabilizers are used as the first / second medical reagent resistant layers. Within 24-72 hours, the brown mark will fade or disappear on its own and will not reappear. In addition, not all stabilizers can cause rapid fading of povidone-iodine. According to Example 7, no organotin stabilizer was used, and the fading speed and effect were slow. It should also be noted that in the same composition ratio of the medical reagent resistant reinforcing layer, the use of organotin stabilizers achieved better fading effect of povidone-iodine. The effect of organotin stabilizers on fading povidone-iodine is weakened when combined with other stabilizers.

[0080] Third, regarding the explanation of reagent abrasion resistance in Examples 9-12: Through foaming, the surface of the medical reagent resistant PVC layer becomes fluffy. After being soaked in medical reagent, it is easy to produce scratches when rubbed with cotton cloth. However, in actual medical reagent resistant wall plastic, the medical reagent resistant reinforcing layer is set on the surface, which can effectively avoid the generation of scratches.

[0081] In summary, the components and proportions of the structure described in this application can produce a product with good fading properties, compliance with heavy metals, and resistance to iodine tincture and other medical reagents.

[0082] The key design feature of this invention is that by incorporating a medical reagent-resistant PVC layer and a medical reagent-resistant reinforcing layer, the wall plastic exhibits excellent resistance to alcohol, iodine, and peracetic acid. When accidentally exposed to medical reagents such as alcohol or iodine, it effectively protects the inner structure of the wall plastic, preventing damage to the surface and thus avoiding accelerated aging and ensuring its lifespan. Furthermore, it can be cleaned not only with ordinary cleaning agents but also with disinfectant, making the cleaning process more convenient and achieving better results.

[0083] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A wall coating resistant to medical reagents, characterized in that: It includes a substrate layer, a medical reagent-resistant PVC layer, a texture layer, a pattern layer, and a medical reagent-resistant reinforcing layer; the medical reagent-resistant PVC layer is disposed on the surface of the substrate layer; the texture layer is disposed on the surface of the medical reagent-resistant PVC layer; the pattern layer is disposed on the surface of the texture layer; and the medical reagent-resistant reinforcing layer is disposed on the surface of the pattern layer.

2. The medical reagent-resistant wall coating according to claim 1, characterized in that: The medical reagent resistant reinforcing layer is plasticized from a first medical reagent resistant slurry, which includes PVC resin powder, plasticizer, metal stabilizer and epoxidized soybean oil; the mass parts are: 80-120 parts of PVC resin powder, 50-70 parts of plasticizer, 2-4 parts of metal stabilizer and 1-3 parts of epoxidized soybean oil.

3. The medical reagent-resistant wall coating according to claim 1, characterized in that: The medical reagent resistant PVC layer is plasticized from a second medical reagent resistant slurry, which includes PVC resin powder, plasticizer, metal stabilizer, epoxidized soybean oil, foaming agent, zinc oxide, and filler; the mass parts are as follows: 80-120 parts of PVC resin powder, 50-70 parts of plasticizer, 2-4 parts of metal stabilizer, 0.5-1.5 parts of epoxidized soybean oil, 3-5 parts of foaming agent, 1-3 parts of zinc oxide, and 60-80 parts of filler.

4. The medical reagent-resistant wall coating according to claim 2 or 3, characterized in that: The PVC resin powder is preferably P-450 resin; the metal stabilizer is an organotin stabilizer, a mixture of zinc stearate and calcium stearate, or a mixture of organotin stabilizer and zinc stearate and calcium stearate.

5. The medical reagent-resistant wall coating according to claim 4, characterized in that: The organotin stabilizer is one of methyl tin mercaptan, dioctyl tin monooctyl maleate, or dibutyl tin dilaurate.

6. The medical reagent-resistant wall coating according to claim 3, characterized in that: The foaming agent is AC foaming agent.

7. The medical reagent-resistant wall coating according to claim 3, characterized in that: The filler comprises heavy calcium carbonate and titanium dioxide, wherein the mass ratio of heavy calcium carbonate to titanium dioxide is 10-15:1-2, and the particle size of heavy calcium carbonate is 400 mesh.

8. The medical reagent-resistant wall coating according to claim 2, characterized in that: The first medical reagent slurry also includes an antimicrobial agent, wherein the antimicrobial agent is present in 2-3 parts by mass.

9. The medical reagent-resistant wall coating according to claim 3, characterized in that: The second medical reagent slurry also includes an antimicrobial agent, wherein the antimicrobial agent is present in 2-3 parts by mass.

10. A method for preparing a medical reagent-resistant wall coating as described in any one of claims 1-9, characterized in that: It includes the following steps: S1. Preparation of the first medical reagent slurry premix: First, place the plasticizer, metal stabilizer, and epoxidized soybean oil in a container, then add PVC resin powder to the container and stir evenly to obtain the first medical reagent slurry premix. S2. Preparation of the second medical reagent slurry premix: First, plasticizer, metal stabilizer, epoxidized soybean oil, filler, AC powder and zinc oxide are added simultaneously and stirred evenly. Then, PVC resin powder is added to the container and stirred evenly to obtain the second medical reagent slurry premix. S3. Antimicrobial agents are added in steps S1 and S2 respectively to form new first medical reagent resistant slurry premix and second medical reagent resistant slurry premix; S4: Preparation of the medical reagent resistant PVC layer: The second medical reagent resistant slurry premix obtained in step S2 or S3 above is applied using a coating device. The premix is ​​pumped into the coating device, and the device is controlled to print 250-350 g / m² on the surface of the substrate layer. 2 At room temperature, the molecules of the above-mentioned second medical reagent PVC slurry can flow. When heated to 95-105℃, the PVC resin particles in the premix absorb the plasticizer. When the temperature continues to rise to above 160℃, the plasticization of the slurry is completed. S5. Preparation of the texture layer: While still hot, the surface of the medical reagent resistant PVC layer prepared in step S4 is embossed using an embossing device to form a texture layer; S6. Preparation of the pattern layer: The texture layer surface obtained in step S5 is printed with a pattern using a printing press to form a pattern layer; S7. Preparation of the medical reagent resistant reinforcing layer: The premix obtained in S1 or S3 is printed onto the product after the pattern layer preparation using a printing machine. Specifically, the premix obtained in S1 or S3 is pumped into the coating device, and the equipment is controlled to operate at a rate of 20 g / m². 2 The printing process involves two printing cycles, with the paste being heated to 95-105℃ and then plasticized at 160℃ or higher.

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