Coating liquid for protecting heat-sensitive material of medical film and preparation method of coating liquid

Abstract

The invention discloses a coating liquid for protecting a heat-sensitive material of a medical film and a preparation method of the coating liquid, and belongs to the technical field of coating liquids. The anti-static coating comprises the following raw materials in parts by weight: 0.5-4 parts of a lubricant, 1-5 parts of a filler, 1-8 parts of an adhesive, 0.2-9 parts of polymer resin, 0.01-0.5 part of an anti-static agent, 2-4 parts of a plasticizer, 0.1-3 parts of a surfactant and 7-28 parts of deionized water. The thermosensitive dry film produced by using the coating liquid disclosed by the invention has relatively strong adhesive force, so that a protective layer and a thermosensitive imaging layer have relatively good adhesion and strong flexibility, and meanwhile, the thermosensitive dry film produced by using the coating liquid disclosed by the invention has good waterproofness and antistatic property, so that the film is effectively prevented from being affected with damp or absorbing water, and the service life of the film is prolonged. Dust is not easily adsorbed on the film, and the film quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coating liquids, and in particular relates to a coating liquid for protecting heat-sensitive materials of medical films and a preparation method thereof. Background Art

[0002] With the continuous development of medical imaging technology, the demand for medical films has gradually increased. Medical films are divided into medical wet films and medical dry films. Medical wet films are traditional films, mainly referring to silver halide photosensitive medical films. This type of medical film is easily affected by external environmental factors, is difficult to preserve, and requires developer and fixer to complete the development and fixing process during use. Medical dry film is a medical film that is processed by thermal, laser, and inkjet printing. This film can be processed without the use of developer and fixer, and is currently the main medical imaging recording material.

[0003] Medical dry film is divided into inkjet dry film, laser dry film and thermal dry film according to the imaging method. Inkjet dry film is a medical film made using inkjet technology. It uses a blue 7-mil polyester film base, has a high black density and is completely waterproof. Laser dry film is a film specially used for dry laser printers. The photosensitive imaging layer contains silver salt imaging particles and can be developed without darkroom technology processing. Thermal dry film is made by coating a photosensitive emulsion and a thermal layer on one side of a transparent film base. It is used to record, display and store medical images. Thermal dry film includes a protective layer, a thermal imaging layer, a bonding layer, a support layer, an absorption layer, and a backing layer. In a thermal printer, it is an image recording medium that forms an image based on the different temperatures of the thermal print head.

[0004] It shows that the protective layer of the current thermal dry film has poor waterproof performance, is easily affected by moisture, and is prone to static electricity, which affects the quality of the film. In view of this, it is necessary to provide a coating liquid for protecting the thermal sensitive material of medical film and a preparation method thereof to coat it into a protective film. Summary of the invention

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

[0006] A coating liquid for protecting a heat-sensitive material of a medical film comprises the following raw materials in parts by weight:

[0007] 0.5-4 parts of lubricant, 1-5 parts of filler, 1-8 parts of adhesive, 0.2-9 parts of polymer resin, 0.01-0.5 parts of antistatic agent, 2-4 parts of plasticizer, 0.1-3 parts of surfactant, and 7-28 parts of deionized water.

[0008] As a further improvement of the technical solution, the following raw materials are included by weight:

[0009] 2 parts of lubricant, 3 parts of filler, 5 parts of adhesive, 6 parts of polymer resin, 0.3 parts of antistatic agent, 3 parts of plasticizer, 1.5 parts of surfactant, and 17 parts of deionized water.

[0010] As a further improvement of the technical solution, the lubricant includes silicone oil, polyethylene wax and oleic acid amide.

[0011] As a further improvement of the technical solution, the adhesive includes polyvinyl alcohol and hydroxypropyl methylcellulose.

[0012] As a further improvement of the technical solution, the antistatic agent includes a polythiophene dispersion and an alkyl phosphate diethanolamine salt.

[0013] As a further improvement of the technical solution, the filler is one or more of calcium carbonate, magnesium carbonate, kaolin, aluminum hydroxide, and nano-silicon dioxide.

[0014] The present application also provides a method for preparing a coating liquid for protecting a heat-sensitive material of a medical film, comprising the following steps:

[0015] Step 1: Weigh lubricant, filler, adhesive, polymer resin, antistatic agent, plasticizer, surfactant, and deionized water according to corresponding weight parts;

[0016] Step 2: Add filler, adhesive, polymer resin, lubricant, plasticizer, surfactant and antistatic agent into deionized water in sequence and stir evenly to obtain a mixed solution;

[0017] Step 3: Centrifuge and degas the mixed solution in step 2 to obtain a coating solution.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The thermal dry film produced using the coating liquid of the present application has strong adhesion, so that the protective layer and the thermal imaging layer have good adhesion and strong flexibility. At the same time, the thermal dry film produced using the coating liquid of the present application has good waterproofness and anti-static properties, which effectively prevents the film from getting damp or absorbing water, and is not easy for dust to be adsorbed on the film, thereby improving the quality of the film. DETAILED DESCRIPTION

[0020] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples described. The experimental methods for specific adjustments not specified in the following examples are selected according to the product specifications. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs.

[0021] Embodiment 1:

[0022] A coating liquid for protecting a heat-sensitive material of a medical film comprises the following raw materials in parts by weight:

[0023] Lubricant 200G, filler 300G, adhesive 500G, polymer resin 600G, antistatic agent 30G, plasticizer 300G, surfactant 150G, deionized water 1700G. In this embodiment, the filler is calcium carbonate.

[0024] Preferably, the lubricant includes silicone oil, polyethylene wax and oleic acid amide.

[0025] Preferably, the binder comprises polyvinyl alcohol and hydroxypropyl methylcellulose.

[0026] Preferably, the antistatic agent comprises a polythiophene dispersion and an alkyl phosphate diethanolamine salt.

[0027] The preparation method of the coating solution comprises the following steps:

[0028] Step 1: Weigh lubricant, filler, adhesive, polymer resin, antistatic agent, plasticizer, surfactant, and deionized water according to corresponding weight parts;

[0029] Step 2: Add deionized water into a stirrer, then start the stirrer to stir, and add fillers, adhesives, polymer resins, lubricants, plasticizers, surfactants and antistatic agents to the stirrer in sequence, the stirring speed of the stirrer is 1200r / min, the stirring time is at least 20 minutes, and a mixed solution is obtained after uniform stirring;

[0030] Step 3: Place the mixed solution in step 2 in a centrifuge for centrifugal degassing at a centrifugal speed of 1600 r / min for at least 20 minutes to obtain a coating solution.

[0031] Embodiment 2:

[0032] A coating liquid for protecting a heat-sensitive material of a medical film comprises the following raw materials in parts by weight:

[0033] Lubricant 400G, filler 500G, adhesive 800G, polymer resin 900G, antistatic agent 50G, plasticizer 400G, surfactant 300G, deionized water 2800G. In this embodiment, the filler is magnesium carbonate.

[0034] Preferably, the lubricant includes silicone oil, polyethylene wax and oleic acid amide.

[0035] Preferably, the binder comprises polyvinyl alcohol and hydroxypropyl methylcellulose.

[0036] Preferably, the antistatic agent comprises a polythiophene dispersion and an alkyl phosphate diethanolamine salt.

[0037] The preparation method of the coating solution comprises the following steps:

[0038] Step 1: Weigh lubricant, filler, adhesive, polymer resin, antistatic agent, plasticizer, surfactant, and deionized water according to corresponding weight parts;

[0039] Step 2: Add deionized water into a stirrer, then start the stirrer to stir, and add fillers, adhesives, polymer resins, lubricants, plasticizers, surfactants and antistatic agents to the stirrer in sequence, the stirring speed of the stirrer is 1200r / min, the stirring time is at least 20 minutes, and a mixed solution is obtained after uniform stirring;

[0040] Step 3: Place the mixed solution in step 2 in a centrifuge for centrifugal degassing at a centrifugal speed of 1600 r / min for at least 20 minutes to obtain a coating solution.

[0041] Embodiment 3:

[0042] A coating liquid for protecting a heat-sensitive material of a medical film comprises the following raw materials in parts by weight:

[0043] Lubricant 50G, filler 100G, adhesive 100G, polymer resin 20G, antistatic agent 30G, plasticizer 200G, surfactant 10G, deionized water 700G, in this embodiment, the filler is kaolin.

[0044] Preferably, the lubricant includes silicone oil, polyethylene wax and oleic acid amide.

[0045] Preferably, the binder comprises polyvinyl alcohol and hydroxypropyl methylcellulose.

[0046] Preferably, the antistatic agent comprises a polythiophene dispersion and an alkyl phosphate diethanolamine salt.

[0047] The preparation method of the coating solution comprises the following steps:

[0048] Step 1: Weigh lubricant, filler, adhesive, polymer resin, antistatic agent, plasticizer, surfactant, and deionized water according to corresponding weight parts;

[0049] Step 2: Add deionized water into a stirrer, then start the stirrer to stir, and add fillers, adhesives, polymer resins, lubricants, plasticizers, surfactants and antistatic agents to the stirrer in sequence, the stirring speed of the stirrer is 1200r / min, the stirring time is at least 20 minutes, and a mixed solution is obtained after uniform stirring;

[0050] Step 3: Place the mixed solution in step 2 in a centrifuge for centrifugal degassing at a centrifugal speed of 1600 r / min for at least 20 minutes to obtain a coating solution.

[0051] Embodiment 4:

[0052] A coating liquid for protecting a heat-sensitive material of a medical film comprises the following raw materials in parts by weight:

[0053] Lubricant 200G, filler 300G, adhesive 500G, polymer resin 600G, antistatic agent 30G, plasticizer 300G, surfactant 150G, deionized water 1700G. In this embodiment, the filler is aluminum hydroxide.

[0054] Preferably, the lubricant includes silicone oil, polyethylene wax and oleic acid amide.

[0055] Preferably, the binder comprises polyvinyl alcohol and hydroxypropyl methylcellulose.

[0056] Preferably, the antistatic agent comprises a polythiophene dispersion and an alkyl phosphate diethanolamine salt.

[0057] The preparation method of the coating solution comprises the following steps:

[0058] Step 1: Weigh lubricant, filler, adhesive, polymer resin, antistatic agent, plasticizer, surfactant, and deionized water according to corresponding weight parts;

[0059] Step 2: Add deionized water into a stirrer, then start the stirrer to stir, and add fillers, adhesives, polymer resins, lubricants, plasticizers, surfactants and antistatic agents to the stirrer in sequence, the stirring speed of the stirrer is 1200r / min, the stirring time is at least 20 minutes, and a mixed solution is obtained after uniform stirring;

[0060] Step 3: Place the mixed solution in step 2 in a centrifuge for centrifugal degassing at a centrifugal speed of 1600 r / min for at least 20 minutes to obtain a coating solution.

[0061] Embodiment 5:

[0062] A coating liquid for protecting a heat-sensitive material of a medical film comprises the following raw materials in parts by weight:

[0063] Lubricant 200G, filler 300G, adhesive 500G, polymer resin 600G, antistatic agent 30G, plasticizer 300G, surfactant 150G, deionized water 1700G. In this embodiment, the filler is nano-silicon dioxide.

[0064] Preferably, the lubricant includes silicone oil, polyethylene wax and oleic acid amide.

[0065] Preferably, the binder comprises polyvinyl alcohol and hydroxypropyl methylcellulose.

[0066] Preferably, the antistatic agent comprises a polythiophene dispersion and an alkyl phosphate diethanolamine salt.

[0067] The preparation method of the coating solution comprises the following steps:

[0068] Step 1: Weigh lubricant, filler, adhesive, polymer resin, antistatic agent, plasticizer, surfactant, and deionized water according to corresponding weight parts;

[0069] Step 2: Add deionized water into a stirrer, then start the stirrer to stir, and add fillers, adhesives, polymer resins, lubricants, plasticizers, surfactants and antistatic agents to the stirrer in sequence, the stirring speed of the stirrer is 1200r / min, the stirring time is at least 20 minutes, and a mixed solution is obtained after uniform stirring;

[0070] Step 3: Place the mixed solution in step 2 in a centrifuge for centrifugal degassing at a centrifugal speed of 1600 r / min for at least 20 minutes to obtain a coating solution.

[0071] Comparative Example 1:

[0072] Thermal dry film available on the market.

[0073] Performance evaluation:

[0074] Cuticle adhesion test: The coating solutions prepared in Examples 1 to 5 were applied in the production process of thermal dry films, and the cuticle adhesion test was performed with the thermal dry films in Comparative Example 1 at the same time:

[0075] (A) After the thermal dry type is made, rub it vigorously. If the thermal imaging layer does not fall off and there are no creases, it is 0; if the thermal imaging layer falls off slightly and has slight creases, it is 1; if the thermal imaging layer falls off over a large area and has a large number of creases, it is 2.

[0076] (B) In thermal dry film printing, if there is no particle shedding, the value is 0; if there is some particle shedding, the value is 1.

[0077] Waterproof performance test: the coating liquid prepared in Examples 1 to 5 was applied in the production process of thermal dry film, and the waterproof performance test was carried out with the thermal dry film in Comparative Example 1 at the same time:

[0078] After the thermal dry type is made, it is placed in an environment of 100 degrees Celsius and 100% humidity for 30 days, and then printed. Compare and observe whether it affects the color development. If there is no effect on the color development quality, it is 0, and if there is any effect on the color development, it is 1.

[0079] Anti-scratch performance test: the coating liquids prepared in Examples 1 to 5 were applied in the production process of thermal dry film, and at the same time, the anti-scratch performance test was carried out with the thermal dry film in Comparative Example 1:

[0080] After the thermal dry type is made, it is placed in an anti-scratch testing machine. The scraper scratches the surface of the film. If there is a scratch on the surface of the film, it is 1, and if there is no obvious scratch, it is 0.

[0081] Antistatic performance and smoothness test: The coating liquids prepared in Examples 1 to 5 were applied in the production process of thermal dry film, and the antistatic performance and smoothness tests were performed with the thermal dry film in Comparative Example 1:

[0082] The surface resistivity meter and Buick smoothness tester (HK-PHD) were used for testing respectively, and the testing was based on GB / T1410-2006.

[0083] Table 1 Test results

[0084]

[0085] The above test results are shown in Table 1. It can be seen from Table 1 that the thermal dry film produced using the coating liquid of the present application has strong adhesion, so that the protective layer and the thermal imaging layer have good adhesion and strong flexibility. At the same time, the thermal dry film produced using the coating liquid of the present application has good waterproofness and anti-static properties, which effectively prevents the film from getting damp or absorbing water, and is not easy for dust to be adsorbed on the film, thereby improving the quality of the film.

[0086] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the present invention.

Claims

1. A coating liquid for protecting heat-sensitive materials of medical films, characterized in that: The following raw materials are included by weight: 0.5-4 parts of lubricant, 1-5 parts of filler, 1-8 parts of adhesive, 0.2-9 parts of polymer resin, 0.01-0.5 parts of antistatic agent, 2-4 parts of plasticizer, 0.1-3 parts of surfactant, and 7-28 parts of deionized water.

2. The coating liquid for protecting the heat-sensitive material of medical film according to claim 1, characterized in that: The following raw materials are included by weight: 2 parts of lubricant, 3 parts of filler, 5 parts of adhesive, 6 parts of polymer resin, 0.3 parts of antistatic agent, 3 parts of plasticizer, 1.5 parts of surfactant, and 17 parts of deionized water.

3. The coating liquid for protecting the heat-sensitive material of medical film according to claim 1, characterized in that: The lubricant includes silicone oil, polyethylene wax and oleic acid amide.

4. The coating liquid for protecting the heat-sensitive material of medical film according to claim 1, characterized in that: The binder includes polyvinyl alcohol and hydroxypropyl methylcellulose.

5. The coating liquid for protecting the heat-sensitive material of medical film according to claim 1, characterized in that: The antistatic agent comprises a polythiophene dispersion and an alkyl phosphate diethanolamine salt.

6. The coating liquid for protecting the heat-sensitive material of medical film according to claim 1, characterized in that: The filler is one or more of calcium carbonate, magnesium carbonate, kaolin, aluminum hydroxide and nano silicon dioxide.

7. The method for preparing a coating liquid for protecting a heat-sensitive material of a medical film according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Weigh lubricant, filler, adhesive, polymer resin, antistatic agent, plasticizer, surfactant, and deionized water according to corresponding weight parts; Step 2: Add filler, adhesive, polymer resin, lubricant, plasticizer, surfactant and antistatic agent into deionized water in sequence and stir evenly to obtain a mixed solution; Step 3: Centrifuge and degas the mixed solution in step 2 to obtain a coating solution.

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