Medical reagent resistant wall plastic and preparation method thereof

Abstract

The medical reagent-resistant wall plastic comprises a substrate layer, a medical reagent-resistant PVC (polyvinyl chloride) layer, a texture layer, a pattern layer and a medical reagent-resistant reinforcing layer, by arranging the medical reagent-resistant PVC layer and the medical reagent-resistant reinforcing layer, the wall plastic has good alcohol resistance, iodophor resistance and peracetic acid resistance, when a user carelessly stands on the medical reagent such as alcohol or iodophor, the inner layer structure of the wall plastic can be effectively protected, the surface layer cannot be damaged by the medical reagent, the accelerated aging process of the wall plastic is avoided, and the service life of the wall plastic is prolonged. According to the wall plastic, the service life of the wall plastic is guaranteed, meanwhile, during cleaning, not only can common cleaning agents be adopted for cleaning, but also disinfectant can be adopted for cleaning, the cleaning process is more convenient, and the cleaning effect is better.

Description

Technical Field

[0001] The invention relates to the technology of wallpaper field, in particular to a medical reagent resistant wall plastic and a preparation method thereof. Background Art

[0002] There are many kinds of wall decoration materials, such as natural stone, ceramic tile and other inorganic decorative materials; coatings; decorative wall panels; decorative wallpaper and wall cloth; wall plastics and other materials, all of which can achieve good wall decoration effects. Among them, wall plastics are made of vinyl as the base material, printed with colorful patterns and coated with a wear-resistant layer on the surface. They are beautiful, durable, with a variety of colors and no fading. Some wall plastics are made into various patterns and concave and convex textures, giving them a strong texture. They are similar to wallpaper and wall cloth, but not the same. Wall plastics have a wide range of practical applications, including but not limited to the interior walls of rooms and offices, and are also suitable for medical rooms, wards, sanatoriums and other places. The rich patterns create a comfortable and warm environment for patients and health monitors or relieve anxiety, and also have a certain wall protection effect.

[0003] The protective effect of wallpaper and wall plastic is limited to the protection against common stains (such as dust, water and detergent, etc.), and the functionality is relatively simple. In places such as medical offices, wards, and nursing homes, iodine tincture, medical alcohol, peracetic acid and other medical reagents are often used to disinfect patients and health monitoring personnel locally, which will inevitably be contaminated on the wall. Existing wallpaper and wall plastics are easily contaminated with medical reagents to destroy the wear-resistant protective layer on the surface of the wall plastic, thereby accelerating the aging of the wall material and ultimately shortening the service life of the wall plastic. Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the invention

[0004] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a medical reagent-resistant wall plastic and a preparation method thereof, which can effectively solve the problems of the existing wall plastic having a single functionality, easily damaging the protective layer when contaminated with medical reagents, and having a short service life.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A medical reagent-resistant wall plastic comprises a base material layer, a medical reagent-resistant PVC layer, a texture layer, a pattern layer and a medical reagent-resistant reinforcement layer; the medical reagent-resistant PVC layer is arranged on the surface of the base material layer; the texture layer is arranged on the surface of the medical reagent-resistant PVC layer; the pattern layer is arranged on the surface of the texture layer; and the medical reagent-resistant reinforcement layer is arranged on the surface of the pattern layer.

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

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

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

[0010] As a preferred embodiment, the organic tin stabilizer is one of methyl tin mercaptan, dioctyl tin dimaleate or dibutyl tin dilaurate.

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

[0012] As a preferred solution, the filler includes 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 solution, the first medical agent-resistant slurry further includes an antimicrobial agent, wherein the mass fraction of the antimicrobial agent is 2-3 parts.

[0014] As a preferred solution, the second medical agent-resistant slurry further comprises an antimicrobial agent, wherein the mass fraction of the antimicrobial agent is 2-3 parts.

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

[0016] S1. Preparation of the first medical reagent resistant slurry premix: firstly put a plasticizer, a metal mold stabilizer, and epoxy soybean oil in a container, then add PVC resin powder into the container, stir evenly, and obtain the first medical reagent resistant slurry premix;

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

[0018] S3, adding antimicrobial agents in steps S1 and S2 respectively to form new first medical agent resistant slurry premix and second medical agent resistant slurry premix respectively;

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

[0020] S5, preparation of texture layer: embossing the surface of the medical reagent-resistant PVC layer prepared in step S4 while hot by an embossing device to form a texture layer;

[0021] S6, preparation of pattern layer: printing a pattern on the surface of the texture layer obtained in step S5 by a printing machine to form a pattern layer;

[0022] S7, preparation of medical agent resistant reinforcement layer: the premix obtained in S1 or S3 is printed on the product after the pattern layer is prepared by using a printing machine, specifically, the premix obtained in S1 or S3 is pumped into the coating device, and the control device is controlled to press 20g / m 2 Printing is performed twice, and the slurry is plasticized after being heated at 95-105°C and above 160°C respectively.

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

[0024] By providing a medical reagent-resistant PVC layer and a medical reagent-resistant reinforcement layer, the wall plastic has good resistance to alcohol, iodine and peracetic acid. When accidentally standing on medical reagents such as alcohol or iodine, it can effectively protect the inner layer structure of the wall plastic, and the surface will not be damaged by the medical reagents, thereby avoiding the accelerated aging process of the wall plastic and ensuring the service life of the wall plastic. At the same time, when cleaning, it can not only be cleaned with ordinary cleaning agents, but also with disinfectants. The cleaning process is more convenient and the cleaning effect is better.

[0025] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Description of the accompanying drawings:

[0028] 10. Base material layer; 20. Medical reagent resistant PVC layer; 30. Texture layer; 40. Pattern layer; 50. Medical reagent resistant reinforcement layer. DETAILED DESCRIPTION

[0029] Please refer to Figure 1 As shown, it shows the specific structure of a preferred embodiment of the present invention, which includes a base material layer 10, a medical agent resistant PVC layer 20, a texture layer 30, a pattern layer 40 and a medical agent resistant reinforcement layer 50.

[0030] The medical reagent-resistant PVC layer 20 is arranged on the surface of the base material layer 10; in the present embodiment, the medical reagent-resistant PVC layer is plasticized by a second medical reagent-resistant slurry, and the second medical reagent-resistant slurry includes PVC resin powder, plasticizer, metal mold stabilizer, epoxy soybean oil, foaming agent, zinc oxide and filler; their mass proportions are respectively: 80-120 parts of PVC resin powder, 50-70 parts of plasticizer, 2-4 parts of metal mold stabilizer, 0.5-1.5 parts of epoxy soybean oil, 3-5 parts of foaming agent, 1-3 parts of zinc oxide and 60-80 parts of filler; preferably, their mass proportions are respectively 100 parts of PVC resin powder, 60 parts of plasticizer, 2 parts of metal mold stabilizer, 1 part of epoxy soybean oil, 4 parts of foaming agent, 2 parts of zinc oxide and 68 parts of filler.

[0031] The foaming agent is an AC foaming agent. Since the decomposition temperature of the AC foaming agent is generally between 190°C and 205°C, and the plasticization temperature of the slurry is between 160°C and 180°C, it can be seen that the decomposition temperature of the AC foaming agent is much higher than the plasticization temperature of the slurry. In order to facilitate foaming, a small amount of zinc oxide can be added to the slurry to reduce the decomposition temperature of the AC foaming agent.

[0032] The filler includes 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 meshes. The grade of titanium dioxide is one of R-258, PTA-100 or PTA-120. Among them, the grade of titanium dioxide R-258 is preferred. The titanium dioxide of this grade is subjected to surface treatment by multi-element inorganic coating of zirconium, silicon, aluminum and phosphorus and organic treatment technology, which can reduce the contact between titanium dioxide particles, so that it has good dispersibility and low oil absorption. In addition, adding titanium dioxide under this amount can make the whiteness of the PVC layer good and also have partial mildew and antibacterial effects.

[0033] The texture layer 30 is disposed on the surface of the medical reagent-resistant PVC layer 20 .

[0034] The pattern layer 40 is disposed on the surface of the texture layer 30 .

[0035] The medical reagent-resistant reinforcing layer 50 is arranged on the surface of the pattern layer 40; in the present embodiment, the medical reagent-resistant reinforcing layer 10 is plasticized by a first medical reagent-resistant slurry, and the first medical reagent-resistant slurry includes PVC resin powder, plasticizer, metal mold stabilizer and epoxy soybean oil; the mass proportions thereof are respectively: 80-120 parts of PVC resin powder, 50-70 parts of plasticizer, 2-4 parts of metal mold stabilizer and 1-3 parts of epoxy soybean oil.

[0036] The first medical agent resistant slurry and the second medical agent resistant slurry also include an antimicrobial agent, wherein the mass fraction of the antimicrobial agent is 2-3 parts. The antimicrobial agent is preferably ACTICIDE PLT. Specifically, the main component of ACTICIDE PLT is 2-n-octyl-4-isothiazoline-3-one, with a boiling point of 304.5±25.0°C, and is a light yellow transparent viscous liquid (active matter content 20-45%), with a relatively light color. Applying it on the surface of the pattern layer will not affect the presentation of the pattern of the pattern layer. According to the amount of antimicrobial agent added in the present application, good mildew and antibacterial (Staphylococcus aureus, Escherichia coli) effects can be achieved. In addition, at the plasticizing temperature of the present application, the antimicrobial agent can maintain good thermal stability.

[0037] 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 a large intermolecular force, so the softening temperature and melting temperature of polyvinyl chloride are relatively high, and generally 160-210°C is required for processing. In the polyvinyl chloride molecule, there are chlorine substituents, which easily lead to the polyvinyl chloride degradation reaction caused by the dehydrochlorination of the polyvinyl chloride resin, and the decomposition of polyvinyl chloride will also be aggravated in an oxygen-rich atmosphere, thereby affecting the processing of polyvinyl chloride; in actual production, generally adding additives can reduce the dehydrochlorination reaction of polyvinyl chloride molecules. For example, adding a heat stabilizer, the stabilizers suitable for polyvinyl chloride resin are various, and the commonly used heat stabilizers include basic lead salts (such as tribasic lead sulfate, dibasic lead phosphite), fatty acid soaps (such as barium stearate, copper stearate, lead stearate, etc.), organic tin compounds (such as dibutyltin dilaurate, etc.); using can achieve a good stabilizing effect. Therefore, as a specific example, the PVC resin powder is preferably P-450 resin, which has a milky white appearance.

[0038] The metal stabilizer is an organotin stabilizer, a mixture of zinc stearate and calcium stearate or an organotin stabilizer and a mixture of zinc stearate and calcium stearate. Wherein, the organotin stabilizer is one of methyl tin mercaptide, dioctyl tin dimaleate, and dibutyl tin dilaurate. When using methyl tin mercaptide, the stabilizer can form a tin salt with the hydrogen chloride released during PVC degradation to achieve the effect of absorbing hydrogen chloride. In addition, methyl tin mercaptide can also replace the unstable allyl chloride ions on the PVC chain by its special coordination chemistry to prevent the generation of hydrogen chloride. Zinc stearate is highly active, and a small amount of addition in this ratio can improve the hue and phase of the PVC layer, and has significant anti-sulfurization pollution and anti-precipitation characteristics. In addition, when the organotin stabilizer is used alone, good alcohol resistance and anti-iodophor dyeing effect can be achieved. When the organotin stabilizer is used together with zinc stearate and calcium stearate, there is a good synergistic effect, and good alcohol resistance and anti-iodophor dyeing effect can also be achieved.

[0039] Specifically, the use of epoxy soybean oil in the above-mentioned proportioned components can not only be used as an auxiliary plasticizer to provide good plasticizing effect on polyvinyl chloride, but also as an auxiliary heat stabilizer to improve the weather resistance and heat resistance of polyvinyl chloride. Since the heat stability and weather resistance of epoxy soybean oil are poor when used alone, when used with zinc stearate and calcium stearate, epoxy soybean oil can be used as an intermediate to transfer the allyl chlorine atom to the above-mentioned metal stabilizer to delay the generation of metal chloride, so that the highly active metal stabilizer can be regenerated, and the generation of metal chloride that has the effect of promoting degradation and removing hydrogen chloride is delayed. Therefore, the presence of epoxy soybean oil can improve the internal heat stability and weather resistance of the metal stabilizer system, that is, the metal stabilizer and the epoxy soybean oil play a synergistic effect.

[0040] The plasticizer is DOTP and / or TXIB. When DOTP is used as the plasticizer, the physical and mechanical properties are better because the DOTP molecule has a linear symmetrical structure. When TXIB is used as the plasticizer, the environmental protection is better.

[0041] The preparation method of this embodiment is described in detail as follows:

[0042] S1. Preparation of the first medical reagent resistant slurry premix: firstly put a plasticizer, a metal mold stabilizer, and epoxy soybean oil in a container, then add PVC resin powder into the container, stir evenly, and obtain the first medical reagent resistant slurry premix;

[0043] S2. Preparation of the second medical reagent resistant slurry premix: firstly, plasticizer, metal stabilizer, epoxy soybean oil, filler, AC powder and zinc oxide are added simultaneously, and stirred evenly, and then PVC resin powder is added into the container, and stirred evenly to obtain the second medical reagent resistant slurry premix;

[0044] S3, adding antimicrobial agents in steps S1 and S2 respectively to form new first medical agent resistant slurry premix and second medical agent resistant slurry premix respectively;

[0045] S4: Preparation of medical reagent resistant PVC layer: The second medical reagent resistant slurry premix prepared in the above step S2 or step S3 is applied to the coating device, and the prepared second medical reagent resistant premix is ​​pumped into the coating device, and the control device is controlled to print 250-350g / m on the surface of the substrate layer. 2 At room temperature, the molecules of the second medical reagent-resistant PVC slurry can flow. When heated at 95-105°C, the PVC resin particles in the premix absorb the plasticizer. When the temperature continues to rise to above 160°C, the slurry is plasticized.

[0046] S5, preparation of texture layer: embossing the surface of the medical reagent-resistant PVC layer prepared in step S4 while hot by an embossing device to form a texture layer;

[0047] S6, preparation of pattern layer: printing a pattern on the surface of the texture layer obtained in step S5 by a printing machine to form a pattern layer;

[0048] S7, preparation of medical agent resistant reinforcement layer: the premix obtained in S1 or S3 is printed on the product after the pattern layer is prepared by using a printing machine, specifically, the premix obtained in S1 or S3 is pumped into the coating device, and the control device is controlled to press 20g / m 2 Printing is performed twice, and the slurry is plasticized after being heated at 95-105°C and above 160°C respectively.

[0049] In the preparation process of the first medical reagent resistant slurry, a suitable temperature can be used to achieve a good slurry 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 discolors, reducing its transparency. In order to further ensure the presentation of the finished product pattern, the amount of medical reagent resistant slurry needs to be controlled to obtain a finished product with a better presentation effect.

[0050] Test methods of embodiments and comparative examples:

[0051] 1. Appearance: Test by visual inspection.

[0052] 2. Lightfastness: According to Appendix A of GB / T 34844-2017.

[0053] 3. Heavy metal element content test: Barium, cadmium, chromium, lead, arsenic, mercury, selenium and antimony are tested in accordance with Appendix A of GB 18585-2023.

[0054] 4. Iodine resistance test: Cut 4 samples of appropriate size from similar parts of the coil, such as 50mm*50mm in size, use a dropper to drop 1 drop of 0.5% iodine reagent on the front of the sample, let it stand for 4 hours, then use a white cotton cloth dampened with water to wipe off the remaining iodine, repeat 2-3 times until the cotton cloth is not obviously stained with color, 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.

[0055] 5. Reagent resistance test: alcohol resistance, peracetic acid resistance and 84 disinfectant resistance test method summary: Cut 3 samples of 50mm*50mm in size from the coil, flatten the samples and place them in a culture dish, drop 0.5-1ml of the test agent in the middle of the sample, cover the surface of the sample with polypropylene film after the dropping is completed, press evenly, cover the culture dish cover, and place it in a cool place for 24 hours; after taking out the sample, dip the white cotton cloth in the test agent again, wipe the middle of the sample back and forth 50 times, and observe the color change under sufficient light indoors.

[0056] (1) Alcohol resistance test: the test agent is 75% alcohol;

[0057] (2) Peracetic acid resistance test: the test agent is 0.1% peracetic acid reagent;

[0058] (3) 84 disinfectant resistance test: Prepare the test agent in the ratio (by mass ratio) of 84 disinfectant stock solution: water = 1:9 for use.

[0059] 6. Anti-mildew performance: according to ASTM G21-15;

[0060] 7. Antibacterial performance: According to JIS Z 2801:2012, the bacteria used are Staphylococcus aureus and Escherichia coli.

[0061] Materials used in the embodiments and comparative examples.

[0062] The specific dosage of the medical reagent resistant PVC layer and the medical reagent resistant reinforcement layer is shown in Table 1:

[0063] Table 1

[0064]

[0065] The materials and related grades used in Table 1 are as follows:

[0066] PVC resin powder: brand P-450 resin;

[0067] Plasticizers: DOTP and TXIB;

[0068] Metal stabilizer 1: methyltin mercaptan;

[0069] Metal stabilizer 2: dibutyltin maleate;

[0070] Metal stabilizer 3: calcium stearate;

[0071] Metal stabilizer 4: zinc stearate;

[0072] Metal stabilizer 5: copper stearate;

[0073] Other stabilizers 1: triisodecyl phosphite;

[0074] Filler: The filler is in a mass ratio of heavy calcium carbonate: titanium dioxide = 10:1, the particle size of heavy calcium carbonate is 400 mesh; the grade of titanium dioxide is rutile titanium dioxide R-258;

[0075] Foaming agent: AC foaming agent.

[0076] The test results of the embodiments and comparative examples are shown in Table 2 and Table 3:

[0077] Table 2

[0078]

[0079] Table 3

[0080]

[0081] In Table 1 and Table 2, Examples 1-8 and Comparative Examples 1-2 are studies on the medical agent-resistant reinforcement layer, and Examples 9-12 are studies on the medical agent-resistant PVC layer.

[0082] First, through Example 4 and Comparative Examples 1 and 2 in Table 1 and Table 2, the differences and similarities in the use of stabilizers will affect the fading performance and iodine resistance of the layer structure.

[0083] Second, the explanation of anti-iodine tinting is that iodine is generally an amorphous complex formed by iodine with a surfactant as a carrier and a cosolvent. Specifically, the components of iodine tin are complexes formed by intermolecular affinity or electrostatic attraction. Iodine is located in the middle of the micelle formed by the surfactant. In water, free iodine can be gradually released. Therefore, after iodine tin is dripped on the surface of the wall plastic for a period of time, a small part of the iodine tin will adhere to the surface of the medical reagent resistant reinforcement layer. When wiped with clean water, part of the iodine tin on the surface of the wall plastic is cleaned by water, and part of it cannot be cleaned by clean water or detergent, so there is still brown print on the surface of the wall plastic. At this time, the remaining metal stabilizer in the medical reagent resistant reinforcement layer will react with the residual iodine in a wet environment, so that the iodine tin on the residual surface fades. Generally, the first / second medical reagent resistant layer using an organic tin stabilizer as the stabilizer will have a brown print that will fade or disappear by itself within 24-72 hours and will not reappear. In addition, not all stabilizers can cause rapid fading of iodine tin. According to Example 7, no organotin stabilizer is used, and its fading speed and effect are slow. It should also be noted that in the same component ratio of the medical reagent-resistant reinforcing layer, the use of organotin stabilizers can achieve a good iodine tin fading effect. The effect of the organotin stabilizer on the iodine tin fading is weakened after being compounded with other stabilizers.

[0084] Third, explanation on the resistance to reagent friction of Examples 9-12: The surface of the medical reagent-resistant PVC layer becomes fluffy through foaming, and it is easy to produce scratches by rubbing with cotton cloth after soaking in medical reagents. However, in the actual medical reagent-resistant wall plastic, the medical reagent-resistant reinforcement layer is set on the surface, which can effectively avoid the generation of scratches.

[0085] In summary, by adopting the components and proportions of the structure of the present application, the characteristics of good fading resistance, heavy metal compliance, resistance to iodine and resistance to other medical reagents can be obtained.

[0086] The design focus of the present invention is that by providing a medical reagent-resistant PVC layer and a medical reagent-resistant reinforcement layer, the wall plastic has good alcohol resistance, iodine resistance and peracetic acid resistance. When it is accidentally stained with medical reagents such as alcohol or iodine, it can effectively protect the inner layer structure of the wall plastic, and the surface layer will not be damaged by the medical reagents, thereby avoiding the accelerated aging process of the wall plastic and ensuring the service life of the wall plastic. At the same time, when cleaning, it can be cleaned not only with ordinary cleaning agents but also with disinfectants, so the cleaning process is more convenient and the cleaning effect is better.

[0087] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A medical reagent resistant wall plastic, characterized in that: It includes a base material layer, a medical reagent-resistant PVC layer, a texture layer, a pattern layer and a medical reagent-resistant reinforcement layer; the medical reagent-resistant PVC layer is arranged on the surface of the base material layer; the texture layer is arranged on the surface of the medical reagent-resistant PVC layer; the pattern layer is arranged on the surface of the texture layer; and the medical reagent-resistant reinforcement layer is arranged on the surface of the pattern layer.

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

3. The medical reagent resistant wall plastic according to claim 1, characterized in that: The medical reagent-resistant PVC layer is plasticized by a second medical reagent-resistant slurry, which includes PVC resin powder, plasticizer, metal mold stabilizer, epoxy soybean oil, foaming agent, zinc oxide and filler; the mass proportions thereof are: 80-120 parts of PVC resin powder, 50-70 parts of plasticizer, 2-4 parts of metal mold stabilizer, 0.5-1.5 parts of epoxy 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 plastic according to claim 2 or 3, characterized in that: The PVC resin powder is preferably P-450 resin; the metal stabilizer is an organic tin stabilizer, a mixture of zinc stearate and calcium stearate, or a mixture of an organic tin stabilizer, zinc stearate and calcium stearate.

5. The medical reagent resistant wall plastic according to claim 4, characterized in that: The organic tin stabilizer is one of methyl tin mercaptan, dioctyl tin dimaleate or dibutyl tin dilaurate.

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

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

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

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

10. A method for preparing a medical reagent-resistant wall plastic according to any one of claims 1 to 9, characterized in that: The following steps are included: S1. Preparation of the first medical reagent resistant slurry premix: firstly put a plasticizer, a metal mold stabilizer, and epoxy soybean oil in a container, then add PVC resin powder into the container, stir evenly, and obtain the first medical reagent resistant slurry premix; S2. Preparation of the second medical reagent resistant slurry premix: firstly, plasticizer, metal stabilizer, epoxy soybean oil, filler, AC powder and zinc oxide are added simultaneously, and stirred evenly, and then PVC resin powder is added into the container, and stirred evenly to obtain the second medical reagent resistant slurry premix; S3, adding antimicrobial agents in steps S1 and S2 respectively to form new first medical agent resistant slurry premix and second medical agent resistant slurry premix respectively; S4: Preparation of medical reagent resistant PVC layer: The second medical reagent resistant slurry premix prepared in the above step S2 or step S3 is applied to the coating device, and the prepared second medical reagent resistant premix is ​​pumped into the coating device, and the control device is controlled to print 250-350g / m on the surface of the substrate layer. 2 At room temperature, the molecules of the second medical reagent-resistant PVC slurry can flow. When heated at 95-105°C, the PVC resin particles in the premix absorb the plasticizer. When the temperature continues to rise to above 160°C, the slurry is plasticized. S5, preparation of texture layer: embossing the surface of the medical reagent-resistant PVC layer prepared in step S4 while hot by an embossing device to form a texture layer; S6, preparation of pattern layer: printing a pattern on the surface of the texture layer obtained in step S5 by a printing machine to form a pattern layer; S7, preparation of medical agent resistant reinforcement layer: the premix obtained in S1 or S3 is printed on the product after the pattern layer is prepared by using a printing machine, specifically, the premix obtained in S1 or S3 is pumped into the coating device, and the control device is controlled to press 20g / m 2 Printing is performed twice, and the slurry is plasticized after being heated at 95-105°C and above 160°C respectively.

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