阅读说明：本技术 一种耐高温型热敏医用胶片及其制备方法 (High-temperature-resistant thermosensitive medical film and preparation method thereof ) 是由 张洪涛 于 2021-08-18 设计创作，主要内容包括：本发明提供了一种耐高温型热敏医用胶片及其制备方法,依次包括保护层、热敏成像层、基材层与背层；保护层包括：聚氨酯、聚乙烯醇、微米颗粒改性助剂、环三羟甲基丙烷甲缩醛丙烯酸酯与去离子水。本发明通过将聚氨酯胶黏剂与聚乙烯醇体系混合,可以使得保护层在耐高温、抗刮性能、透明性、降低摩擦系数,发色密度指标方面更加优异,同时本发明加入了微米颗粒改性助剂,通过微米颗粒浸入膜孔,填补膜孔,与体系产生牢固的互锁效应,增加水的传质阻力,降低水的渗透性,从而提高防水性能,耐高温型热敏医用胶片具有优良的防水性并且弹性好、柔韧性强、抗划伤性能好的保护层,提升热敏成像的显色效果,大大提高了胶片成像的稳定性,便于保存。(The invention provides a high-temperature-resistant thermosensitive medical film and a preparation method thereof, and the high-temperature-resistant thermosensitive medical film sequentially comprises a protective layer, a thermosensitive imaging layer, a base material layer and a back layer; the protective layer includes: polyurethane, polyvinyl alcohol, a micron particle modification auxiliary agent, cyclotrimethylolpropane methylal acrylate and deionized water. The high-temperature-resistant thermosensitive medical film has the advantages that the polyurethane adhesive is mixed with a polyvinyl alcohol system, so that the protective layer is more excellent in high-temperature resistance, scratch resistance, transparency, friction coefficient reduction and color development density index, meanwhile, the micron particle modification auxiliary agent is added, micron particles are immersed into film holes to fill the film holes, a firm interlocking effect is generated with the system, the mass transfer resistance of water is increased, and the water permeability is reduced, so that the waterproof performance is improved.)

1. The high-temperature-resistant thermosensitive medical film is characterized by sequentially comprising a protective layer, a thermosensitive imaging layer, a base material layer and a back layer; the protective layer comprises the following raw materials in parts by weight: 50-60 parts of polyurethane, 25-35 parts of polyvinyl alcohol, 4-12 parts of a micro-particle modification auxiliary agent, 3-5 parts of cyclotrimethylolpropane methylal acrylate and 20-30 parts of deionized water.

2. The high-temperature-resistant thermosensitive medical film according to claim 1, wherein the protective layer comprises the following raw materials in parts by weight: 55-60 parts of polyurethane, 30-35 parts of polyvinyl alcohol, 4-8 parts of a micro-particle modification auxiliary agent, 3-5 parts of cyclotrimethylolpropane methylal acrylate and 20-30 parts of deionized water.

3. The high-temperature-resistant thermosensitive medical film according to claim 1, wherein the protective layer comprises the following raw materials in parts by weight: 55-60 parts of polyurethane, 30-35 parts of polyvinyl alcohol, 6-8 parts of a micro-particle modification auxiliary agent, 3-5 parts of cyclotrimethylolpropane methylal acrylate and 20-30 parts of deionized water.

4. The high-temperature-resistant thermosensitive medical film according to claim 1, 2 or 3, wherein the method for preparing the micron-sized particle modification auxiliary agent comprises: weighing 0.5-0.8mmol of 2-aminoterephthalic acid and 0.2-0.4mmol of zirconium compound, respectively dissolving the two compounds in 30-50mL of N, N-dimethylformamide, respectively carrying out ultrasonic treatment on the solutions for 30-45 minutes, then placing the solutions in a reaction kettle, heating the solutions at 130-150 ℃ for 24 hours, and cooling the obtained solutions to room temperature; then centrifugally separating, washing for 3 times by 50-100mL of absolute ethyl alcohol to remove unreacted N, N-dimethylformamide, centrifugally separating again, and drying in a drying oven at 95-120 ℃ for 3-4 hours to obtain the micron particle modification auxiliary agent.

5. The heat-resistant thermosensitive medical film according to claim 4, wherein the zirconium compound is zirconium tetrachloride.

6. The heat-resistant thermosensitive medical film according to claim 4, wherein the thermosensitive imaging layer comprises color-developing microcapsules, dye microcapsules, color-developing auxiliary and binder, the particle size of the color-developing microcapsules is 0.2-0.5 micron, and the particle size of the dye microcapsules is 0.3-0.8 micron.

7. The high-temperature-resistant thermosensitive medical film according to claim 4, wherein the back layer comprises 50-60 parts by weight of modified epoxy resin, 15-18 parts by weight of matting agent, 10-12 parts by weight of cross-linking agent, 8-10 parts by weight of antistatic agent and 15-25 parts by weight of deionized water.

8. The preparation method of the high-temperature-resistant thermosensitive medical film is characterized by comprising the following steps of:

1) preparing a substrate layer and preparing a backing layer according to the formulation of claim 7;

2) preparing a protective layer: weighing the raw materials according to the formula of the protective layer of any one of claims 1 to 5, preparing the micron particle modification auxiliary agent into an aqueous solution, ultrasonically dispersing, adding polyurethane, polyvinyl alcohol, cyclotrimethylolpropane formal acrylate and deionized water, and uniformly stirring for later use;

3) preparing a thermographic layer according to the formulation of claim 6;

4) respectively coating the thermosensitive imaging layer obtained in the step 3) and the back layer obtained in the step 1) on two sides of the base material layer obtained in the step 1) in a coating mode, then coating the protective layer obtained in the step 2) on the other side of the thermosensitive imaging layer, and carrying out heat setting and rolling to obtain the high-temperature-resistant thermosensitive medical film.

9. The method for preparing a high temperature resistant thermosensitive medical film according to claim 8, wherein the thickness of the protective layer is 1-3 μm, the thickness of the thermosensitive imaging layer is 6-8 μm, the thickness of the substrate layer is 200-260 μm, and the thickness of the backing layer is 0.8-1.2 μm.

10. The method for preparing a high temperature resistant thermosensitive medical film according to claim 8, wherein in the step 2), the polyurethane is added and stirred for 20-30min, then the polyvinyl alcohol is added and stirred for 30-40min, and then the cyclotrimethylolpropane formal acrylate and the deionized water are added.

Technical Field

The invention belongs to the technical field of thermosensitive printing materials, relates to a thermosensitive medical film, and particularly relates to a high-temperature-resistant thermosensitive medical film which is high-temperature-resistant and can improve the waterproof performance and the scratch resistance of the film and a preparation method thereof.

Background

The thermosensitive recording material can realize miniaturization of a recording apparatus as compared with a conventional silver salt recording material, and has advantages of simple processing technique and equipment, low cost, no need of development, easy obtainment of higher image density, no noise in a recording process, and the like, thereby achieving rapid development.

Early thermal recording materials formed images by directly applying a developer and a leuco dye to one layer or adjacent layers of a support by means of addition, much like pressure-sensitive techniques. Although the image quality is roughly good, graininess, gradation, and resolution are inferior to those of conventional silver salt recording materials. In order to search for more efficient and inexpensive information recording materials, heat-sensitive microcapsule technology based on microcapsule technology has been studied.

The prior thermosensitive recording material has a mature technology internationally, the thermosensitive medical film adopting the microcapsule technology occupies a large market share of Fuji and Sony companies, the domestic Lekai group company 2005 completes the development of the thermosensitive medical film, the image quality can be comparable with the products of the Fuji companies, and the product is marketized and obtains considerable benefits.

The thermosensitive medical film can realize the processing of images in a direct heating mode while meeting the advantages of the traditional thermosensitive recording materials, is convenient and quick, ensures the requirements of multilevel, high-quality and high-capacity image information recording, and has become the mainstream in medical image recording. Meanwhile, with the increasing use requirements, higher requirements are put on the comprehensive performance of the thermal film, and many research subjects are increasingly focused on the industry. Such as us patent 5529891, chinese patent CN200610012671.5 by leksha, china, for the study of friction coefficient and print head contamination. And as foreign researchers, have conducted detailed studies on the resolution and stability of the thermo-sensitive film and the static electricity and adhesion occurring during the use, and have proposed various solutions.

The main problems in the use of thermal recording films are the inherent technical problems of direct thermal imaging: contact printing, the film closely contacts with the printer head in the printing process, continuously rubs: the actual formation time of the image unit is around lOms, and high heat transfer is achieved in such a short time that relatively high pressure is inevitably required between the print head and the film. Meanwhile, the instantaneous temperature of the actual printing head can reach more than 270 ℃, the highest temperature of the printer partially requires to be higher and even reaches 340-360 ℃, although the contact time is short, the instantaneous temperature has higher requirements on the high temperature resistance and the pressure resistance of the thermosensitive film protective layer.

The thermosensitive film is generally imaged by using an organic thermosensitive coating, and the problem of poor adhesion between a film base and the thermosensitive imaging layer exists in part of the thermosensitive film, and meanwhile, the smoothness and the antistatic effect are poor, so that the adhesion phenomenon is generated in the printing process, and the machine-passing performance is poor. The polyvinyl alcohol film is used as a protective layer, so that the waterproof performance is poor, the film is easily affected with damp, the heat transfer is not uniform, the surface friction resistance is large, the color development of an imaging layer is influenced, and the key parts of thermosensitive imaging equipment are damaged in serious cases.

Disclosure of Invention

The invention aims to solve the defects that the existing thermosensitive medical film has poor waterproof performance, is easy to be affected with damp, generates uneven heat transfer, has large surface friction resistance and poor high-temperature resistance, influences the color development of an imaging layer, and seriously damages key parts of thermosensitive imaging equipment.

The invention also aims to provide a preparation method of the high-temperature-resistant thermosensitive medical film.

In order to achieve the purpose, the invention adopts the following technical scheme:

a high-temperature-resistant thermosensitive medical film comprises a protective layer, a thermosensitive imaging layer, a base material layer and a back layer in sequence; the protective layer comprises the following raw materials in parts by weight: 50-60 parts of polyurethane, 25-35 parts of polyvinyl alcohol, 4-12 parts of a micro-particle modification auxiliary agent, 3-5 parts of cyclotrimethylolpropane methylal acrylate and 20-30 parts of deionized water.

In this solution, the synthesis of polyurethane adhesives is based on the unique chemical properties of isocyanates. Isocyanates are compounds containing isocyanate groups (-NCO) in the molecule, which have a highly unsaturated bond structure with an arrangement of overlapping double bonds and are capable of reacting with various active hydrogen-containing compounds. In the field of polyurethane adhesives, isocyanates containing 2 or more-NCO characteristic groups are predominantly used.

And by mixing the polyurethane adhesive with the polyvinyl alcohol system, the protective layer has more excellent high temperature resistance, scratch resistance, transparency, friction coefficient reduction and color development density index, but the water resistance is relatively poor.

Based on the poor water resistance of the polyurethane adhesive and a polyvinyl alcohol system, the invention adds the micron particle modification auxiliary agent, fills the membrane pores by immersing the micron particles into the membrane pores, generates firm interlocking effect with the system, increases the mass transfer resistance of water, reduces the water permeability, and thus improves the waterproof performance.

As a preferable scheme of the invention, the protective layer comprises the following raw materials in parts by weight: 55-60 parts of polyurethane, 30-35 parts of polyvinyl alcohol, 4-8 parts of a micro-particle modification auxiliary agent, 3-5 parts of cyclotrimethylolpropane methylal acrylate and 20-30 parts of deionized water.

As a preferable scheme of the invention, the protective layer comprises the following raw materials in parts by weight: 55-60 parts of polyurethane, 30-35 parts of polyvinyl alcohol, 6-8 parts of a micro-particle modification auxiliary agent, 3-5 parts of cyclotrimethylolpropane methylal acrylate and 20-30 parts of deionized water.

As a preferable scheme of the invention, the preparation method of the microparticle modification auxiliary agent comprises the following steps: weighing 0.5-0.8mmol of 2-aminoterephthalic acid and 0.2-0.4mmol of zirconium compound, respectively dissolving in 30-50mL of N, N-dimethylformamide, respectively carrying out ultrasonic treatment on the solutions for 30-45 minutes, then placing the solutions in a reaction kettle, heating the solutions at 130-150 ℃ for 24 hours, and cooling the obtained solutions to room temperature; then centrifugally separating, washing for 3 times by 50-100mL of absolute ethyl alcohol to remove unreacted N, N-dimethylformamide, centrifugally separating again, and drying in a drying oven at 95-120 ℃ for 3-4 hours to obtain the micron particle modification auxiliary agent.

In the technical scheme, the zirconium compound is adopted to react with the 2-amino terephthalic acid, so that the zirconium compound can be combined with carboxyl and amino, the subsequent entering of the polyurethane adhesive and a polyvinyl alcohol system into a membrane hole is facilitated, and due to the addition of the zirconium compound, the scratch resistance and the friction coefficient can be improved while the waterproof performance of the protective layer can be improved.

In a preferred embodiment of the present invention, the zirconium compound is zirconium tetrachloride.

As a preferable scheme of the invention, the thermosensitive imaging layer comprises color developing microcapsules, dye microcapsules, a color developing auxiliary agent and a binder, wherein the particle size of the color developing microcapsules is 0.2-0.5 micron, and the particle size of the dye microcapsules is 0.3-0.8 micron.

As a preferable scheme of the invention, the back layer comprises 50-60 parts of modified epoxy resin, 15-18 parts of matting agent, 10-12 parts of crosslinking agent, 8-10 parts of antistatic agent and 15-25 parts of deionized water in parts by weight.

A preparation method of a high-temperature-resistant thermosensitive medical film comprises the following steps:

1) preparing a substrate layer and preparing a back layer according to the formula;

2) preparing a protective layer: weighing the raw materials according to the formula amount of the protective layer, preparing the micron particle modification auxiliary agent into an aqueous solution, carrying out ultrasonic dispersion, adding polyurethane, polyvinyl alcohol, cyclotrimethylolpropane methylal acrylate and deionized water, and uniformly stirring for later use;

3) preparing a thermosensitive imaging layer according to the formula;

4) respectively coating the thermosensitive imaging layer obtained in the step 3) and the back layer obtained in the step 1) on two sides of the base material layer obtained in the step 1) in a coating mode, then coating the protective layer obtained in the step 2) on the other side of the thermosensitive imaging layer, and carrying out heat setting and rolling to obtain the high-temperature-resistant thermosensitive medical film.

As a preferable mode of the invention, the thickness of the protective layer is 1-3 microns, the thickness of the thermosensitive imaging layer is 6-8 microns, the thickness of the substrate layer is 200-260 microns, and the thickness of the back layer is 0.8-1.2 microns.

As a preferable scheme of the invention, in the step 2), after adding polyurethane, stirring for 20-30min, adding polyvinyl alcohol, continuously stirring for 30-40min, and then adding the cyclotrimethylolpropane formal acrylate and deionized water.

Compared with the prior art, the invention has the following beneficial effects:

1) the polyurethane adhesive is mixed with a polyvinyl alcohol system, so that the protective layer has better high temperature resistance, scratch resistance, transparency, friction coefficient reduction and color development density index;

2) the high-temperature-resistant thermosensitive medical film prepared by the invention has a protective layer with excellent waterproofness, good elasticity, strong flexibility and good scratch resistance, improves the color development effect of thermosensitive imaging, greatly improves the imaging stability of the film and is convenient to store.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the invention, the back layer comprises 50-60 parts of modified epoxy resin, 15-18 parts of matting agent, 10-12 parts of cross-linking agent, 8-10 parts of antistatic agent and 15-25 parts of deionized water in parts by weight;

the thermosensitive imaging layer comprises color development microcapsules, dye microcapsules, a color development auxiliary agent and an adhesive, wherein the particle size of the color development microcapsules is 0.2-0.5 micron, and the particle size of the dye microcapsules is 0.3-0.8 micron;

the raw materials and preparation methods of the back layer, the raw materials and preparation methods of the color developing microcapsule, the dye microcapsule, the color developing auxiliary and the adhesive can adopt the raw materials and preparation methods of the back layer commonly used in the prior art, and the raw materials and preparation methods of the color developing microcapsule, the dye microcapsule, the color developing auxiliary and the adhesive, for example, a thermosensitive film of Chinese patent, publication No. CN 107267046A, a preparation method thereof, and formulas and preparation methods of the thermosensitive imaging layer and the back layer described in the application, which are not described in detail below.

Example 1

The embodiment provides a high-temperature-resistant thermosensitive medical film which sequentially comprises a protective layer, a thermosensitive imaging layer, a base material layer and a back layer; the protective layer comprises the following raw materials in parts by weight: 55 parts of polyurethane, 30 parts of polyvinyl alcohol, 7 parts of a micron particle modification auxiliary agent, 3 parts of cyclotrimethylolpropane methylal acrylate and 25 parts of deionized water.

The preparation method of the micron particle modification auxiliary agent comprises the following steps: weighing 0.5mmol of 2-aminoterephthalic acid and 0.2mmol of zirconium tetrachloride, respectively dissolving the two in 30mL of N, N-dimethylformamide, respectively carrying out ultrasonic treatment on the solutions for 30 minutes, then placing the solutions in a reaction kettle, heating the solutions at 130 ℃ for 24 hours, and cooling the obtained solutions to room temperature; then, the mixture is centrifugally separated, washed 3 times by 50mL of absolute ethyl alcohol to remove unreacted N, N-dimethylformamide, centrifugally separated again and put into a drying oven to be dried for 3 hours at 95 ℃ to obtain the micron particle modification auxiliary agent.

The preparation method of the high-temperature-resistant thermosensitive medical film comprises the following steps:

1) preparing a substrate layer and a back layer;

2) preparing a protective layer: weighing the raw materials according to the formula amount of the protective layer, preparing the micron particle modification auxiliary agent into an aqueous solution, ultrasonically dispersing, adding polyurethane, stirring for 20min, adding polyvinyl alcohol, continuously stirring for 30min, continuing to stir the cyclic trimethylolpropane methylal acrylate and deionized water, and uniformly stirring for later use;

3) preparing a thermosensitive imaging layer;

4) respectively coating the thermosensitive imaging layer obtained in the step 3) and the back layer obtained in the step 1) on two sides of the base material layer obtained in the step 1) in a coating mode, then coating the protective layer obtained in the step 2) on the other side of the thermosensitive imaging layer, and carrying out heat setting and rolling to obtain the high-temperature-resistant thermosensitive medical film.

The thickness of the protective layer is 1-3 microns, the thickness of the thermal imaging layer is 6-8 microns, the thickness of the substrate layer is 200-260 microns, and the thickness of the back layer is 0.8-1.2 microns.

Example 2

The embodiment provides a high-temperature-resistant thermosensitive medical film which sequentially comprises a protective layer, a thermosensitive imaging layer, a base material layer and a back layer; the protective layer comprises the following raw materials in parts by weight: 50 parts of polyurethane, 35 parts of polyvinyl alcohol, 12 parts of a micron particle modification auxiliary agent, 5 parts of cyclotrimethylolpropane methylal acrylate and 30 parts of deionized water.

The preparation method of the micron particle modification auxiliary agent comprises the following steps: weighing 0.6mmol of 2-aminoterephthalic acid and 0.3mmol of zirconium tetrachloride, respectively dissolving the two in 45mL of N, N-dimethylformamide, respectively carrying out ultrasonic treatment on the solutions for 35 minutes, then placing the solutions in a reaction kettle, heating the solutions at 120 ℃ for 24 hours, and cooling the obtained solutions to room temperature; then, the mixture is centrifugally separated, washed for 3 times by 80mL of absolute ethyl alcohol to remove unreacted N, N-dimethylformamide, centrifugally separated again and placed in a drying oven to be dried for 4 hours at 100 ℃ to obtain the micron particle modification auxiliary agent.

The preparation method of the high-temperature-resistant thermosensitive medical film comprises the following steps:

1) preparing a substrate layer and a back layer;

2) preparing a protective layer: weighing the raw materials according to the formula amount of the protective layer, preparing the micron particle modification auxiliary agent into an aqueous solution, ultrasonically dispersing, adding polyurethane, stirring for 25min, adding polyvinyl alcohol, continuously stirring for 35min, continuing to stir the cyclic trimethylolpropane methylal acrylate and deionized water, and uniformly stirring for later use;

3) preparing a thermosensitive imaging layer;

4) respectively coating the thermosensitive imaging layer obtained in the step 3) and the back layer obtained in the step 1) on two sides of the base material layer obtained in the step 1) in a coating mode, then coating the protective layer obtained in the step 2) on the other side of the thermosensitive imaging layer, and carrying out heat setting and rolling to obtain the high-temperature-resistant thermosensitive medical film.

The thickness of the protective layer is 1-3 microns, the thickness of the thermal imaging layer is 6-8 microns, the thickness of the substrate layer is 200-260 microns, and the thickness of the back layer is 0.8-1.2 microns.

Example 3

The embodiment provides a high-temperature-resistant thermosensitive medical film which sequentially comprises a protective layer, a thermosensitive imaging layer, a base material layer and a back layer; the protective layer comprises the following raw materials in parts by weight: 60 parts of polyurethane, 25 parts of polyvinyl alcohol, 4 parts of a micron particle modification auxiliary agent, 5 parts of cyclotrimethylolpropane methylal acrylate and 30 parts of deionized water.

The preparation method of the micron particle modification auxiliary agent comprises the following steps: weighing 0.8mmol of 2-aminoterephthalic acid and 0.4mmol of zirconium tetrachloride, respectively dissolving the two in 50mL of N, N-dimethylformamide, respectively carrying out ultrasonic treatment on the solutions for 45 minutes, then placing the solutions in a reaction kettle, heating the solutions at 150 ℃ for 24 hours, and cooling the obtained solutions to room temperature; then, the mixture is centrifugally separated, washed 3 times by 100mL of absolute ethyl alcohol to remove unreacted N, N-dimethylformamide, centrifugally separated again and placed in a drying oven to be dried for 4 hours at 120 ℃ to obtain the micron particle modification auxiliary agent.

The preparation method of the high-temperature-resistant thermosensitive medical film comprises the following steps:

1) preparing a substrate layer and a back layer;

2) preparing a protective layer: weighing the raw materials according to the formula amount of the protective layer, preparing the micron particle modification auxiliary agent into an aqueous solution, performing ultrasonic dispersion, adding polyurethane, stirring for 30min, adding polyvinyl alcohol, continuously stirring for 40min, continuing to stir the cyclic trimethylolpropane methylal acrylate and deionized water, and uniformly stirring for later use;

3) preparing a thermosensitive imaging layer;

4) respectively coating the thermosensitive imaging layer obtained in the step 3) and the back layer obtained in the step 1) on two sides of the base material layer obtained in the step 1) in a coating mode, then coating the protective layer obtained in the step 2) on the other side of the thermosensitive imaging layer, and carrying out heat setting and rolling to obtain the high-temperature-resistant thermosensitive medical film.

The thickness of the protective layer is 1-3 microns, the thickness of the thermal imaging layer is 6-8 microns, the thickness of the substrate layer is 200-260 microns, and the thickness of the back layer is 0.8-1.2 microns.

Comparative example 1

Comparative example 1 is the same as example 1, except that no microparticle modification aid is added.

Comparative example 2

Thermosensitive medical films are commercially available.

Evaluation of Performance

(1) Pellicle adhesion test

A. After the thermosensitive film is made, the thermosensitive imaging layer does not fall off after being kneaded with force, the number of folds is 0 if no folds exist, the number of folds is 1 if the thermosensitive imaging layer slightly falls off, and the number of folds is 2 if the thermosensitive imaging layer slightly falls off in large area and a large number of folds occur;

B. in film printing, the number of particles falling off is 0 when no particles fall off, and the number of particles falling off is 1 when some particles fall off.

(2) Test of Water resistance

After the thermal sensitive film is manufactured, the thermal sensitive film is placed in an environment with 100 ℃ and 100% humidity for 30 days, then printing is carried out, whether color development is influenced or not is respectively observed in a contrast mode, if no influence is caused on color development quality, the color development quality is 0, and if any influence is caused, the color development quality is 1.

(3) Scratch resistance test

After the thermal sensitive film is manufactured, the thermal sensitive film is placed in a scratch-resistant detection machine, a scraping needle scrapes the surface of the protective film, the scratch on the surface of the protective film is 1, and the scratch without obvious scratches is 0.

(4) Antistatic Property and smoothness test

The films prepared in examples 1-3 and comparative example 1 were tested using a surface resistance meter, a Becker smoothness tester (HK-PHD), according to GB/T1410-2006.

Specific detection results are shown in table 1:

TABLE 1 test results

As can be seen from table 1, the high temperature resistant type thermosensitive medical film of the present invention has good adhesion between the protective layer, the thermosensitive imaging layer, the substrate layer, and the backing layer; the film is not adhered in the printing process, and has good machine passing performance; meanwhile, the antistatic water-proof paint has better antistatic performance, smoothness and water-proof performance, and the comprehensive performance is more excellent; meanwhile, the micron particle modification auxiliary agent is added, and the micron particles are immersed into the membrane pores to fill the membrane pores, so that a firm interlocking effect is generated with a system, the mass transfer resistance of water is increased, and the water permeability is reduced, thereby improving the waterproof performance.

While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.