CN114114823A - Waterproof and fade-proof PET medical film and preparation method thereof - Google Patents
Waterproof and fade-proof PET medical film and preparation method thereof Download PDFInfo
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- CN114114823A CN114114823A CN202111479982.3A CN202111479982A CN114114823A CN 114114823 A CN114114823 A CN 114114823A CN 202111479982 A CN202111479982 A CN 202111479982A CN 114114823 A CN114114823 A CN 114114823A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/7614—Cover layers; Backing layers; Base or auxiliary layers characterised by means for lubricating, for rendering anti-abrasive or for preventing adhesion
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/85—Photosensitive materials characterised by the base or auxiliary layers characterised by antistatic additives or coatings
- G03C1/89—Macromolecular substances therefor
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Abstract
The invention relates to the technical field of biomedical industry, in particular to a waterproof and fade-proof PET medical film and a preparation method thereof, wherein the film comprises a film base, wherein the surfaces of two ends of the film base are coated with a photosensitive emulsion, and one end of the photosensitive emulsion is coated with a waterproof and fade-proof coating, a polyimide film, an ultraviolet-proof heat-insulating film and a protective film; the medical film has good waterproof and anti-fading performance by coating the polyvinyl chloride waterproof and anti-fading coating. The waterproof and fade-proof coating of polyvinyl chloride is formed by adding cerium oxide, calcium and nano composite epoxy resin into polyvinyl chloride, wherein the calcium can reduce the reaction activity of the cerium oxide, so that the cerium oxide reduces the oxidation of the waterproof and fade-proof coating, and the addition of the cerium oxide and the calcium can prevent the polyvinyl chloride from being irradiated by ultraviolet rays for a long time and being automatically catalyzed and decomposed, so that the discoloration and the waterproof performance are reduced, the PET medical film is corroded and oxidized by water vapor, the discoloration and the fade of the medical film are caused, and the observation and the service life of the medical film are influenced.
Description
Technical Field
The invention relates to the technical field of biomedical industry, in particular to a waterproof and anti-fading PET medical film and a preparation method thereof.
Background
The biomedical industry is composed of biotechnology industry and pharmaceutical industry, and the main contents of the biomedical industry include: enzyme engineering, biochip technology, gene sequencing technology, tissue engineering technology, biological information technology and the like, wherein a Polyethylene Glycol Terephthalate (PET) medical film belongs to a medical product, and the conventional medical film has a layered structure as follows: the film comprises a protective layer, an upper layer of photosensitive emulsion, a filter layer, an interlayer, a middle layer of photosensitive emulsion, a lower layer of photosensitive emulsion, a bonding layer, a substrate and an anti-halation electrostatic layer, wherein the image component of the film, namely the photosensitive emulsion layer, is a core part and is composed of gelatin, silver salt and an additive.
When the current PET medical film is used, the film is placed in a humid environment for a long time, and the medical film is possibly corroded by moisture in the air, so that the medical film is oxidized, faded and discolored, and the use of the medical film is influenced.
Disclosure of Invention
The invention aims to provide a waterproof and fade-proof PET medical film and a preparation method thereof, wherein the film comprises a film base, photosensitive emulsion is coated on the surfaces of two ends of the film base, one end of the photosensitive emulsion is coated with a waterproof and fade-proof coating, a polyimide film, an ultraviolet-proof heat-insulating film and a protective film, and the photosensitive emulsion comprises the following raw material components in percentage by weight: 35-45% of silver nitrate solvent; 20-30% of bromide; 25-45% of gelatin, wherein the waterproof and anti-fading coating comprises the following raw materials in parts by weight: 0.5-3% of cerium oxide, 0.1-0.5% of calcium, 2-3.6% of inorganic nano composite epoxy resin and the balance of polyvinyl chloride.
Optionally, S1, preparing an emulsion: adding silver nitrate solvent and bromide into gelatin solvent, and stirring;
s2, coating the processed emulsion on two sides of the film base;
s3, after the photosensitive emulsion is coated, a waterproof fade-proof coating is coated on the surface of the photosensitive layer;
and S4, sequentially coating a polyimide film, an ultraviolet-proof heat-insulating film and a protective film on one side of the coated waterproof fading-proof coating, and drying and collecting the coated film base.
Optionally, the method is characterized in that: after the photosensitive emulsion is well mixed, heating the photosensitive emulsion to 50-75 ℃, and stirring for 20-30 min at the stirring speed of 350-600 r/min.
Optionally, the photosensitive emulsion is coated on the surface of the substrate by a coating machine, and the coating thickness of the photosensitive emulsion is 0.2-0.5 mm.
Optionally, the base sheet is made of linear low-density polyethylene and polyurethane, and the base sheet comprises the following components in parts by weight: 75-85% of linear low-density polyethylene and 15-25% of polyurethane.
Optionally, the waterproof and fade-proof coating comprises the following raw material components in parts by weight: 0.5-3% of cerium oxide, 0.1-0.5% of calcium and 2-3.6% of inorganic nano composite epoxy resin, and the balance of polyvinyl chloride organic solution, uniformly mixing the polyvinyl chloride organic solution added with the cerium oxide, the calcium and the inorganic nano composite epoxy resin, standing for 1-2.5 h, precipitating the polyvinyl chloride organic solution through standing, and after the polyvinyl chloride organic solution is completely precipitated, putting the polyvinyl chloride organic solution into a low-temperature chamber for condensation treatment, wherein the condensation temperature is 10-15 ℃.
Optionally, after the waterproof fading-resistant coating is coated, the substrate is placed into a dryer to be dried for 1-2 hours at the drying temperature of 90-100 ℃, and after the substrate is dried, the polyimide film, the ultraviolet-resistant heat-insulating film and the protective film are sequentially coated on the surface of the waterproof fading-resistant coating through the coating machine respectively.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the polyvinyl chloride waterproof anti-fading coating is coated, so that the medical film has good waterproof anti-fading performance, and the cerium oxide and the calcium are added (wherein the calcium can reduce the reaction activity of the cerium oxide, so that the cerium oxide reduces the oxidation of the waterproof anti-fading coating), thereby enhancing the scattering of the waterproof anti-fading coating on ultraviolet rays, preventing the polyvinyl chloride from being irradiated by the ultraviolet rays for a long time and being automatically catalyzed and decomposed to cause the color change and the waterproof performance reduction, so that the PET medical film is corroded and oxidized by water vapor to cause the problem of the color change and the fading of the medical film, and influencing the observation and the service life of the medical film; by adding the nano composite epoxy resin, the stretch resistance and the impact resistance of the waterproof fading-resistant coating are enhanced, and the service life of the waterproof fading-resistant coating is prolonged.
2. According to the invention, the polyimide film and the inorganic nano composite epoxy resin are added, so that the PET medical film has good corona resistance, and the PET medical film is prevented from being influenced during imaging.
Drawings
FIG. 1 is a schematic structural view of a waterproof fade-proof PET medical film of the invention;
FIG. 2 is a flow chart of the waterproof fade-proof PET medical film and the preparation method thereof.
The reference numbers illustrate:
1. a substrate; 2. an emulsion; 3. a polyimide film; 4. an ultraviolet-proof heat-insulating film; 5. a protective film; 6. waterproof fade-proof coating.
The objects, features, and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1-2, the present invention provides a waterproof and fade-proof PET medical film and a preparation method thereof, including a substrate 1, wherein both end surfaces of the substrate 1 are coated with a photosensitive emulsion 2, and one end of the photosensitive emulsion 2 is coated with a waterproof and fade-proof coating 6, a polyimide film 3, an ultraviolet-proof heat-insulating film 4 and a protective film 5.
In this example, emulsion 2 is prepared from silver nitrate solvent, bromide and gelatin. The raw materials for preparing the photosensitive emulsion 2 comprise the following components in percentage by weight: 35-45% of silver nitrate solvent; 20-30% of bromide; 25-45% of gelatin; in the preparation process, a silver nitrate solvent and bromide are mixed to generate silver bromide, wherein the bromide can be hydrogen bromide, ammonium bromide, sodium bromide and the like, the mass ratio of the silver nitrate in the silver nitrate solvent is 2%, and the balance of distilled water is preferably used.
The waterproof fade-proof coating 6 is formed by adding cerium oxide, calcium and nano composite epoxy resin into polyvinyl chloride organic solution. Wherein the weight ratio of each component is as follows: 0.5-3% of cerium oxide, 0.1-0.5% of calcium, 2-3.6% of nano composite epoxy resin and the balance of polyvinyl chloride organic solution. The polyvinyl chloride organic solution is formed by adding polyvinyl chloride into one or two organic solvents of tetrahydrofuran, dioxane and cyclohexanone, and the waterproof and anti-fading performance of the PET medical film is enhanced by coating the waterproof and anti-fading coating 6, wherein the polyvinyl chloride has good waterproof performance but poor stability to light and heat. The cerium oxide can strengthen the scattering of the waterproof fading-resistant coating 6 to ultraviolet rays, but the cerium oxide has stronger reactivity, the oxidation of the waterproof fading-resistant coating 6 can be accelerated without being added through treatment, the aging of the waterproof fading-resistant coating 6 is accelerated, the reactivity of the cerium oxide can be reduced by calcium, the reactivity of the cerium oxide is reduced, the oxidation of the waterproof fading-resistant coating 6 is reduced by the cerium oxide, the scattering of the waterproof fading-resistant coating 6 to ultraviolet rays is enhanced, the waterproof fading-resistant coating 6 of the PET medical film is prevented from being automatically catalyzed and decomposed by the irradiation of ultraviolet rays for a long time, the color change and the waterproof performance are reduced, the PET medical film is corroded and oxidized by water vapor, the color change and fading problem of the medical film is caused, and the observation and the service life of the medical film are influenced. The nano composite epoxy resin is prepared by dispersing one or more nano materials such as nano silicon dioxide, nano titanium dioxide, nano zinc oxide and the like in epoxy resin and mixing, wherein the epoxy resin can be tetrabromobisphenol A-glycidyl ether type epoxy resin (brominated epoxy), polyamide resin and the like. The nano composite epoxy resin can enhance the tensile resistance and the impact resistance of the waterproof fading-resistant coating 6, enhance the service life of the waterproof fading-resistant coating 6 and prevent the waterproof fading-resistant coating 6 from being damaged due to bending so as to influence the waterproof fading-resistant performance.
In this embodiment, calcium is added to the polyvinyl chloride organic solution in the form of calcium carbonate, and calcium ions are separated and doped into cerium oxide by heating the calcium carbonate to react with the cerium oxide, so that the valence of 2+ calcium is lower and the ionic radius is larger, thereby stabilizing the octahedral structure of cerium in the cerium oxide, reducing the formation of oxygen vacancies, and further weakening the reactivity of the cerium oxide.
The ultraviolet-proof heat-insulating film 4 can be a metal magnetron sputtering film, an amber optical nano ceramic heat-insulating film and the like, and the amber optical nano ceramic heat-insulating film is preferably selected, so that the heat-insulating effect is good, the oxidation is difficult to occur, and the service life is long. The protective film 5 can be a Polyvinyl Chloride (PVC) protective film, an Anti-reflection (AR) protective film and an Oriented Polypropylene (OPP) protective film, the AR protective film is preferably selected, and the AR protective film is soft and has strong friction resistance and scratch resistance; the polyimide film can enable the PET medical film to have good corona resistance, and the PET medical film is prevented from being influenced during imaging.
The thickness of the film base 1 is 0.4mm-0.6mm, the thickness of the photosensitive emulsion 2 is 0.2mm-0.5mm, the thickness of the polyimide film 3 is 0.01mm-0.2mm, the thickness of the ultraviolet-proof heat-insulating film 4 is 0.1mm-0.6mm, the thickness of the protective film 5 is 0.2mm-0.6mm, and the thickness of the waterproof fading-proof coating 6 is 0.05mm-0.3 mm. In some embodiments, the substrate 1 has a thickness of 0.5mm, the emulsion 2 has a thickness of 0.2mm, the polyimide film 3 has a thickness of 0.01mm, the uv-blocking film 4 has a thickness of 0.1mm, the protective film 5 has a thickness of 0.2mm, and the water-and discoloration-preventing coating 6 has a thickness of 0.05 mm.
The preparation method of the waterproof and fade-proof PET medical film comprises the following steps:
s1, preparing the photosensitive emulsion 2.
Adding silver nitrate solvent and bromide into gelatin solvent according to the above proportion, and stirring; respectively adding a silver nitrate solvent and a bromide into a gelatin solvent, and stirring, wherein the weight percentages of the silver nitrate solvent, the bromide and the gelatin are as follows: 35-45% of silver nitrate solvent; 20-30% of bromide; 25-45% of gelatin, after the photosensitive emulsion 2 is well mixed, the photosensitive emulsion 2 is heated to 50-75 ℃, the stirring is carried out for 20-30 min, the stirring speed is 350-600 r/min, the silver nitrate solvent and bromide react more fully during the stirring through a heating container, the mixing of the photosensitive emulsion 2 can be accelerated, the photosensitive emulsion is more uniformly mixed, the quality of the photosensitive emulsion is better, the photosensitive effect of the photosensitive emulsion is better, and the PET medical film can be used for better imaging.
S2, coating the processed photosensitive emulsion 2 on both sides of the base 1.
The base sheet 1 is made of linear low-density polyethylene and polyurethane, and the base sheet 1 comprises the following components in parts by weight: 75-85% of linear low-density polyethylene and 15-25% of polyurethane. The thickness of the film base 1 is 0.4-0.6 mm, the photosensitive emulsion 2 is coated on the surface of the film base 1 through a coating machine, the coating thickness of the photosensitive emulsion 2 is 0.2-0.5 mm, after the photosensitive emulsion 2 is coated, the film base 1 is placed into a drying machine to be dried for 1-2 hours, and the drying temperature is 90-100 ℃.
S3, after the photosensitive emulsion 2 is coated, the surface of the photosensitive layer is coated with the waterproof fade-proof coating 6.
Adding 0.5-3 wt% of cerium oxide, 0.1-0.5 wt% of calcium and 2-3.6 wt% of nano composite epoxy resin into a polyvinyl chloride organic solution, uniformly mixing the polyvinyl chloride organic solution with the cerium oxide, the calcium and the nano composite epoxy resin, standing for 1-2.5 h, precipitating undissolved cerium oxide particles in the polyvinyl chloride organic solution by standing, and filtering the undissolved cerium oxide particles by a Buchner funnel. After the waterproof and fade-proof solvent is prepared, the waterproof and fade-proof solvent is coated on the surface of the photosensitive layer to form the waterproof and fade-proof coating 6. The waterproof and fade-proof performance of the PET medical film is enhanced by coating the waterproof and fade-proof coating 6, and the coating thickness of the waterproof and fade-proof coating 6 is 0.05mm-0.3 mm.
According to an embodiment of the present invention, the weight ratio of cerium oxide with respect to the waterproof and discoloration-preventing coating 6 is not more than 3%, for example, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.5%, 2%, 2.5%, etc., and when the weight ratio of cerium oxide with respect to the waterproof and discoloration-preventing coating 6 is more than 3%, the oxidation of the waterproof and discoloration-preventing coating 6 is accelerated, resulting in discoloration of the waterproof and discoloration-preventing coating 6, and the change in the weight ratio of cerium oxide adjusts the intensity of the ultraviolet irradiation resistance of the waterproof and discoloration-preventing coating 6.
According to an embodiment of the present invention, the weight ratio of calcium to the waterproof and discoloration-preventing coating 6 is not more than 0.5%, for example, 0.1%, 0.15%, 0.2%, 0.25%, 0.3%, 0.35%, 0.4%, etc., and when the weight ratio of calcium to the waterproof and discoloration-preventing coating 6 is more than 0.5%, an excessive amount of calcium remains after the calcium and cerium oxide have sufficiently reacted, the structure of the waterproof and discoloration-preventing coating 6 is destroyed, the waterproof property of the waterproof and discoloration-preventing coating 6 is affected, and a change in the weight ratio of calcium affects the reactivity of cerium oxide.
According to one embodiment of the present invention, the weight ratio of the nanocomposite epoxy resin to the waterproof fade-resistant coating 6 is not greater than 3.6%, e.g., 2%, 2.5%, 3%, 3.5%, etc., and variations in the weight ratio of the nanocomposite epoxy resin may affect the stretch-resistance and impact-resistance properties of the waterproof fade-resistant coating 6.
And S4, sequentially coating a polyimide film 3, an ultraviolet-proof heat-insulating film 4 and a protective film 5 on one side of the coated waterproof and anti-fading coating, and drying and collecting the coated film base 1.
After the substrate 1 is dried, the coated polyimide film 3, the ultraviolet-proof heat-insulating film 4 and the protective film 5 are respectively coated on the surface of the waterproof fading-proof coating 6 sequentially through a coating machine. The thickness of the polyimide film 3 is 0.01mm-0.2mm, the thickness of the ultraviolet-proof heat-insulating film 4 is 0.1mm-0.6mm, and the thickness of the protective film 5 is 0.2mm-0.6 mm. The ultraviolet-proof heat-insulating film 4 can be a metal magnetron sputtering film and an amber optical nano ceramic heat-insulating film, the amber optical nano ceramic heat-insulating film is preferably selected, the heat-insulating effect is good, the oxidation is difficult, the service life is long, the protective film 5 can be a PVC protective film, an AR protective film and an OPP protective film, the AR protective film is preferably selected, the AR protective film is soft, and has strong friction resistance and scratch resistance, and the polyimide film can enable the PET medical film to have good corona resistance and prevent the PET medical film from being influenced during imaging.
Example 1
Adding silver nitrate solvent and bromide into gelatin solvent, and stirring; respectively adding a silver nitrate solvent and a bromide into a gelatin solvent, and stirring, wherein the weight percentages of the silver nitrate solvent, the bromide and the gelatin are as follows: 40% of silver nitrate solvent; 25% of bromide; 35% of gelatin, after the photosensitive emulsion 2 is well mixed, the photosensitive emulsion 2 is heated to 65 ℃, the stirring speed is 20min, the stirring speed is 400r/min, the silver nitrate solvent and bromide react more fully when the stirring can be realized through a heating container, the mixing of the photosensitive emulsion 2 can be accelerated, the photosensitive emulsion is more uniformly mixed, the quality of the photosensitive emulsion is better, the photosensitive effect of the photosensitive emulsion is better, and the PET medical film can be used for better imaging.
After the preparation of the photosensitive emulsion 2 is finished, the processed photosensitive emulsion 2 is coated on two sides of the film base 1, the material of the film base 1 is linear low-density polyethylene and polyurethane, and the weight ratio of the components of the film base 1 is as follows: 80% of linear low-density polyethylene and 20% of polyurethane. Coating the photosensitive emulsion 2 on the surface of the film base 1 through a coating machine, and after the coating of the photosensitive emulsion 2 is finished, putting the film base 1 into a drying machine for drying for 1 hour, wherein the drying temperature is 90 ℃.
In the process of manufacturing the waterproof and anti-fading coating 6, 1.2% of cerium oxide, 0.5% of calcium and 2.5% of nano composite epoxy resin by weight are added into a polyvinyl chloride organic solution, the polyvinyl chloride organic solution added with the cerium oxide, the calcium and the nano composite epoxy resin is uniformly mixed and stands for 2 hours, the polyvinyl chloride organic solution is precipitated, undissolved cerium oxide particles are precipitated and precipitated, the undissolved cerium oxide particles precipitated are filtered through a Buchner funnel, and after the waterproof and anti-fading solvent is prepared, the waterproof and anti-fading solvent is coated on the surface of the photosensitive layer, and the waterproof and anti-fading performance of the PET medical film is enhanced by coating the waterproof and anti-fading coating 6.
And respectively coating a polyimide film 3, an amber optical nano ceramic heat insulation film and an AR protective film on one side of the coated waterproof and anti-fading coating by a coating machine, and drying and collecting the coated film base 1. The polyimide film can enable the PET medical film to have good corona resistance, and the PET medical film is prevented from being influenced during imaging.
In the above embodiment: the thickness of the film base 1 is 0.4mm, the thickness of the photosensitive emulsion 2 is 0.2mm, the thickness of the polyimide film 3 is 0.05mm, the thickness of the amber optical nano ceramic heat insulation film is 0.1mm, the thickness of the AR protective film is 0.2mm, and the thickness of the waterproof and anti-fading coating 6 is 0.05 mm.
By adding cerium oxide, the damage of ultraviolet rays to the waterproof and anti-fading coating 6 can be better protected, and the parameters of the PET medical film prepared by the method are as follows: heat reflectance: 83% -86%, emissivity: 90% -93%, thermal conductivity coefficient: 0.04-0.045W/m.K, ultraviolet reflectance: not less than 0.9-0.95, surface drying time: 20-26 min, and complete curing time: 20-23 h.
Example 2
Adding silver nitrate solvent and bromide into gelatin solvent, and stirring; respectively adding a silver nitrate solvent and a bromide into a gelatin solvent, and stirring, wherein the weight percentages of the silver nitrate solvent, the bromide and the gelatin are as follows: 45% of silver nitrate solvent; 28% of bromide; 27% of gelatin, after the photosensitive emulsion 2 is well mixed, the photosensitive emulsion 2 is heated to 70 ℃, the stirring is carried out for 25min, the stirring speed is 380r/min, the silver nitrate solvent and bromide react more fully when the stirring is carried out through a heating container, the mixing of the photosensitive emulsion 2 can be accelerated, the photosensitive emulsion is more uniformly mixed, the quality of the photosensitive emulsion is better, the photosensitive effect of the photosensitive emulsion is better, and the medical PET film can be used for better imaging.
After the preparation of the photosensitive emulsion 2 is finished, the processed photosensitive emulsion 2 is coated on two sides of the film base 1, the material of the film base 1 is linear low-density polyethylene and polyurethane, and the weight ratio of the components of the film base 1 is as follows: 85% of linear low-density polyethylene and 15% of polyurethane. Coating the photosensitive emulsion 2 on the surface of the film base 1 through a coating machine, and after the coating of the photosensitive emulsion 2 is finished, putting the film base 1 into a drying machine for drying for 1.5h, wherein the drying temperature is 95 ℃.
In the process of manufacturing the waterproof and anti-fading coating 6, 0.6 percent of cerium oxide, 0.15 percent of calcium and 2.5 percent of nano composite epoxy resin by weight ratio are added into polyvinyl chloride organic solution, the polyvinyl chloride organic solution added with the cerium oxide, the calcium and the nano composite epoxy resin is uniformly mixed and stands for 2 hours, the polyvinyl chloride organic solution is precipitated, undissolved cerium oxide particles are precipitated, the undissolved cerium oxide particles precipitated are filtered through a Buchner funnel, after the waterproof and anti-fading solvent is prepared, the waterproof and anti-fading solvent is coated on the surface of the photosensitive layer, and the waterproof and anti-fading performance of the PET medical film is enhanced by coating the waterproof and anti-fading coating 6.
And respectively coating a polyimide film 3, an amber optical nano ceramic heat insulation film and an AR protective film on one side of the coated waterproof and anti-fading coating by a coating machine, and drying and collecting the coated film base 1. The polyimide film can enable the PET medical film to have good corona resistance, and the PET medical film is prevented from being influenced during imaging.
In the above embodiment: the thickness of the film base 1 is 0.45mm, the thickness of the photosensitive emulsion 2 is 0.22mm, the thickness of the polyimide film 3 is 0.06mm, the thickness of the amber optical nano ceramic heat insulation film is 0.2mm, the thickness of the AR protective film is 0.25mm, and the thickness of the waterproof and anti-fading coating 6 is 0.09 mm.
By reducing the dosage of cerium oxide, the oxidation of cerium oxide to the PET medical film can be better reduced, the service life of the PET medical film is prolonged, and the parameters of the PET medical film prepared by the method are as follows: heat reflectance: 80% -82%, emissivity: 85% -87%, heat conductivity coefficient: 0.042-0.047W/m.K, ultraviolet reflectance: not less than 0.8-0.85, surface drying time: 21-25 min, and complete curing time: 22-24 h.
In conclusion, the PET medical film prepared in the embodiments 1-2 has better performance.
While the invention has been described in further detail in connection with specific embodiments thereof, it will be understood that the invention is not limited thereto, and that various other modifications and substitutions may be made by those skilled in the art without departing from the spirit of the invention, which should be considered to be within the scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a waterproof fade-proof PET medical film which characterized in that: including film base (1), film base (1) both ends surface coating has emulsion (2), emulsion (2) one end coating has waterproof fade-proof coating (6), polyimide film (3), ultraviolet protection heat insulating film (4) and protection film (5), emulsion (2) raw materials composition's weight ratio is: 35-45% of silver nitrate solvent, 20-30% of bromide and 25-45% of gelatin, wherein the waterproof and anti-fading coating (6) comprises the following raw materials in parts by weight: 0.5-3% of cerium oxide, 0.1-0.5% of calcium, 2-3.6% of inorganic nano composite epoxy resin and the balance of polyvinyl chloride.
2. A preparation method of a waterproof and fade-proof PET medical film comprises the following steps:
s1, preparing emulsion (2): adding silver nitrate solvent and bromide into gelatin solvent, and stirring;
s2, coating the processed photosensitive emulsion (2) on the two sides of the base (1);
s3, after the photosensitive emulsion (2) is coated, coating a waterproof fade-proof coating (6) on the surface of the photosensitive layer;
s4, coating a polyimide film (3), an ultraviolet-proof heat-insulating film (4) and a protective film (5) on one side of the coated waterproof and anti-fading coating in sequence, and drying and collecting the coated substrate (1).
3. The method for preparing a waterproof fade-proof PET medical film according to claim 2, wherein: after the photosensitive emulsion (2) is well mixed, heating the photosensitive emulsion (2) to 50-75 ℃, and stirring for 20-30 min at the stirring speed of 350-600 r/min.
4. The method for preparing a waterproof fade-proof PET medical film according to claim 2, wherein: coating the photosensitive emulsion (2) on the surface of the film base (1) through a coating machine, wherein the coating thickness of the photosensitive emulsion (2) is 0.2-0.5 mm.
5. The method for preparing a waterproof fade-proof PET medical film according to claim 2, wherein: the film base (1) is made of linear low-density polyethylene and polyurethane, and the film base (1) comprises 75-85% of the linear low-density polyethylene and 15-25% of the polyurethane in percentage by weight.
6. The method for preparing a waterproof fade-proof PET medical film according to claim 2, wherein: 0.5-3% of cerium oxide, 0.1-0.5% of calcium and 2-3.6% of inorganic nano composite epoxy resin, and the balance of polyvinyl chloride organic solution, uniformly mixing the polyvinyl chloride organic solution added with the cerium oxide, the calcium and the inorganic nano composite epoxy resin, standing for 1-2.5 h, precipitating the polyvinyl chloride organic solution through standing, and after the polyvinyl chloride organic solution is completely precipitated, putting the polyvinyl chloride organic solution into a low-temperature chamber for condensation treatment, wherein the condensation temperature is 10-15 ℃.
7. The method for preparing a waterproof fade-proof PET medical film according to claim 2, wherein: after the waterproof and fade-proof coating (6) is coated, the film base (1) is placed into a dryer to be dried for 1-2 hours at the drying temperature of 90-100 ℃, and after the film base (1) is dried, the polyimide film (3), the ultraviolet-proof heat-insulating film (4) and the protective film (5) are sequentially coated on the surface of the waterproof and fade-proof coating (6) through a coating machine respectively.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115160615A (en) * | 2022-06-23 | 2022-10-11 | 上海艾乐影像材料有限公司 | Energy-saving and environment-friendly production and processing technology of medical film |
| CN115197507A (en) * | 2022-06-10 | 2022-10-18 | 安徽理工大学环境友好材料与职业健康研究院(芜湖) | Preparation method and application of polyvinyl chloride ultraviolet shielding additive |
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2021
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115197507A (en) * | 2022-06-10 | 2022-10-18 | 安徽理工大学环境友好材料与职业健康研究院(芜湖) | Preparation method and application of polyvinyl chloride ultraviolet shielding additive |
| CN115197507B (en) * | 2022-06-10 | 2023-11-14 | 安徽理工大学环境友好材料与职业健康研究院(芜湖) | Preparation method and application of polyvinyl chloride ultraviolet shielding additive |
| CN115160615A (en) * | 2022-06-23 | 2022-10-11 | 上海艾乐影像材料有限公司 | Energy-saving and environment-friendly production and processing technology of medical film |
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