Medical film coating method

Abstract

The invention discloses a medical film coating method, and belongs to the technical field of medical film production. The coating method comprises the following steps: coating an inner layer on one side of a film substrate, wherein the thickness of the inner layer is 0.5-1.5 microns; coating a photosensitive layer on one side, far away from the film substrate 1, of the inner layer, wherein the thickness of the photosensitive layer is 13-22 microns; the bottom layer is prepared from the following raw materials in parts by weight: 10 to 20 parts of polyacrylate, 10 to 15 parts of epoxy resin, 3 to 8 parts of silica sol and a proper amount of water; when in use, the polyacrylate, the epoxy resin and the silica sol are respectively weighed and then added into water, and the mixture can be used for coating after being uniformly stirred; the photosensitive layer comprises the following raw materials in parts by weight: 30-45 parts of silver halide, 75-95 parts of gelatin and a proper amount of water; when in use, the silver halide and the gelatin are respectively weighed and then added into water, and the mixture can be used for coating after being uniformly stirred. The medical film provided by the invention is composed of the film substrate, the inner layer, the photosensitive layer and the outer layer, the adhesion between the layers is good, and the medical film has good wear resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of medical film production, and in particular relates to a coating method of a medical film. Background Art

[0002] Medical films can be used to obtain medical images with the help of imaging technologies such as X-rays, CT scans, MRI, and ultrasound, which plays an important role in doctors' diagnosis of diseases and formulation of treatment plans. However, existing medical films have poor wear resistance and poor coating adhesion during use, which leads to coating shedding during film cutting. This results in poor quality of medical films and affects the imaging effect. Summary of the invention

[0003] The present invention provides a coating method for a medical film to solve the above technical problems.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A coating method for a medical film comprises the following steps:

[0006] Coating an inner layer on one side of the film substrate, wherein the thickness of the inner layer is 0.5-1.5 μm;

[0007] Coating a photosensitive layer on the side of the inner layer away from the film substrate, wherein the thickness of the photosensitive layer is 13-22 μm;

[0008] The bottom layer comprises the following raw materials in parts by weight: 10-20 parts of polyacrylate, 10-15 parts of epoxy resin, 3-8 parts of silica sol, and an appropriate amount of water; when used, the polyacrylate, epoxy resin, and silica sol are weighed separately, added into water, stirred evenly, and then used for coating;

[0009] The photosensitive layer comprises the following raw materials in parts by weight: 30-45 parts of silver halide, 75-95 parts of gelatin, and an appropriate amount of water. When in use, the silver halide and gelatin are weighed separately, added into water, stirred evenly, and then used for coating.

[0010] Furthermore, the bottom layer also includes carboxylated styrene-butadiene rubber in an amount of 0.5-2 parts.

[0011] Furthermore, the photosensitive layer also includes a vanadium developer in an amount of 4-8 parts.

[0012] Furthermore, a protective layer is coated on the outer side of the photosensitive layer, and the thickness of the protective layer is 1.5-2 μm.

[0013] Furthermore, the protective layer of the film comprises the following raw materials in parts by weight: 15-25 parts of polyurethane, 5-9 parts of chlorinated polypropylene, 2-4 parts of polymethyl methacrylate, and an appropriate amount of water.

[0014] Furthermore, when the protective layer is used, polyurethane, chlorinated polypropylene, and polymethyl methacrylate are weighed separately, and then polyurethane is added to water and stirred evenly, and then chlorinated polypropylene and polymethyl methacrylate are added in sequence, stirred evenly, and then it can be used for coating.

[0015] Furthermore, the other side of the film substrate corresponding to the inner layer is coated with the inner layer.

[0016] Furthermore, the film also includes an outer layer; the outer layer is arranged on the inner layer at a side away from the film substrate, and the outer layer and the photosensitive layer are located on both sides of the film substrate; the thickness of the outer layer is 1.5-2.5 μm.

[0017] Furthermore, the outer layer comprises the following raw materials in parts by weight: 8-16 parts of epoxy resin, 0.8-1.5 parts of carboxylated styrene-butadiene rubber, 3-8 parts of silica sol, 3-5 parts of ethylene oxide, and an appropriate amount of water; when the outer layer is used, each raw material is weighed, added into water, stirred evenly, and then the coating process can be carried out.

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

[0019] The medical film of the invention consists of a film matrix, an inner layer, a photosensitive layer and an outer layer. The layers have good adhesion and good wear resistance, ensuring that the quality of the produced film can meet the requirements of medical institutions.

[0020] The main raw materials used for the inner layer are polyacrylate, epoxy resin, and silica sol. After being evenly mixed with water, they are coated on the film substrate and have good adhesion. Coating the photosensitive layer on the inner layer can better adhere to the photosensitive layer and avoid the phenomenon of coating falling off when cutting the film. The protective layer protects the photosensitive layer of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the structure of the film of the present invention.

[0023] Figure numerals: 1 - film substrate, 2 - inner layer, 3 - photosensitive layer, 4 - protective layer, 5 - outer layer. DETAILED DESCRIPTION

[0024] To facilitate a better understanding of the present invention, the following examples are provided to illustrate the present invention in conjunction with the accompanying drawings. These examples belong to the protection scope of the present invention, but do not limit the protection scope of the present invention.

[0025] Example 1

[0026] A coating method for medical film, such as Figure 1 As shown, the following steps are included:

[0027] An inner layer 2 is coated on one side of the film substrate 1, and the thickness of the inner layer 2 is 0.5 μm;

[0028] A photosensitive layer 3 is coated on the side of the inner layer 2 away from the film substrate 1, and the thickness of the photosensitive layer 3 is 13 μm;

[0029] The bottom layer 2 comprises the following raw materials in parts by weight: 10 parts of polyacrylate, 10 parts of epoxy resin, 3 parts of silica sol, and an appropriate amount of water; when used, the polyacrylate, epoxy resin, and silica sol are weighed separately, added into water, stirred evenly, and then used for coating;

[0030] The photosensitive layer 3 comprises the following raw materials in parts by weight: 30 parts of silver halide, 75 parts of gelatin, and an appropriate amount of water. When in use, the silver halide and gelatin are weighed separately, added into water, stirred evenly, and then used for coating.

[0031] The bottom layer 2 also includes carboxylated styrene-butadiene rubber in an amount of 0.5 parts.

[0032] The photosensitive layer 3 also includes a vanadium developer in an amount of 4 parts.

[0033] A protective layer 4 is coated on the outer side of the photosensitive layer 3, and the thickness of the protective layer 4 is 1.5 μm.

[0034] like Figure 1 As shown, the film protective layer 4 includes the following raw materials in parts by weight: 15 parts of polyurethane, 5 parts of chlorinated polypropylene, 2 parts of polymethyl methacrylate, and an appropriate amount of water.

[0035] When the protective layer 4 is used, polyurethane, chlorinated polypropylene and polymethyl methacrylate are weighed respectively, and then polyurethane is added into water and stirred evenly, and then chlorinated polypropylene and polymethyl methacrylate are added in sequence and stirred evenly before coating.

[0036] like Figure 1 As shown, the other side of the film substrate 1 corresponding to the inner layer 2 is coated with the inner layer 2.

[0037] like Figure 1 As shown, the film further includes an outer layer 5; the outer layer 5 is arranged on the inner layer 2 at a side away from the film substrate 1; the thickness of the outer layer 5 is 1.5 μm.

[0038] The outer layer 5 comprises the following raw materials in parts by weight: 8 parts of epoxy resin, 0.8 parts of carboxylated styrene-butadiene rubber, 3 parts of silica sol, 3 parts of ethylene oxide, and an appropriate amount of water.

[0039] Example 2

[0040] A coating method for medical film, such as Figure 1 As shown, the following steps are included:

[0041] An inner layer 2 is coated on one side of the film substrate 1, and the thickness of the inner layer 2 is 0.5 μm;

[0042] A photosensitive layer 3 is coated on the side of the inner layer 2 away from the film substrate 1, and the thickness of the photosensitive layer 3 is 13 μm;

[0043] The bottom layer 2 comprises the following raw materials in parts by weight: 10 parts of polyacrylate, 10 parts of epoxy resin, 3 parts of silica sol, and an appropriate amount of water; when used, the polyacrylate, epoxy resin, and silica sol are weighed separately, added into water, stirred evenly, and then used for coating;

[0044] The photosensitive layer 3 comprises the following raw materials in parts by weight: 30 parts of silver halide, 75 parts of gelatin, and an appropriate amount of water. When in use, the silver halide and gelatin are weighed separately, added into water, stirred evenly, and then used for coating.

[0045] The bottom layer 2 also includes carboxylated styrene-butadiene rubber in an amount of 0.5 parts.

[0046] The photosensitive layer 3 also includes a vanadium developer in an amount of 4 parts.

[0047] A protective layer 4 is coated on the outer side of the photosensitive layer 3, and the thickness of the protective layer 4 is 1.5 μm.

[0048] like Figure 1 As shown, the film protective layer 4 includes the following raw materials in parts by weight: 15 parts of polyurethane, 5 parts of chlorinated polypropylene, 2 parts of polymethyl methacrylate, and an appropriate amount of water.

[0049] When the protective layer 4 is used, polyurethane, chlorinated polypropylene and polymethyl methacrylate are weighed respectively, and then polyurethane is added into water and stirred evenly, and then chlorinated polypropylene and polymethyl methacrylate are added in sequence and stirred evenly before coating.

[0050] like Figure 1 As shown, the other side of the film substrate 1 corresponding to the inner layer 2 is coated with the inner layer 2.

[0051] like Figure 1 As shown, the film further comprises an outer layer 5; the outer layer 5 is arranged on the inner layer 2 at a side away from the film substrate 1; the thickness of the outer layer 5 is 1.5 μm.

[0052] The outer layer 5 comprises the following raw materials in parts by weight: 16 parts of epoxy resin, 1.5 parts of carboxylated styrene-butadiene rubber, 8 parts of silica sol, 5 parts of ethylene oxide, and an appropriate amount of water.

[0053] Example 3

[0054] A coating method for medical film, such as Figure 1 As shown, the following steps are included:

[0055] An inner layer 2 is coated on one side of the film substrate 1, and the thickness of the inner layer 2 is 0.8 μm;

[0056] A photosensitive layer 3 is coated on the side of the inner layer 2 away from the film substrate 1, and the thickness of the photosensitive layer 3 is 19 μm;

[0057] The bottom layer 2 comprises the following raw materials by weight: 15 parts of polyacrylate, 12 parts of epoxy resin, 6 parts of silica sol, and an appropriate amount of water; when used, the polyacrylate, epoxy resin, and silica sol are weighed separately, added into water, stirred evenly, and then used for coating;

[0058] The photosensitive layer 3 comprises the following raw materials in parts by weight: 38 parts of silver halide, 82 parts of gelatin, and an appropriate amount of water. When in use, the silver halide and gelatin are weighed separately, added into water, stirred evenly, and then used for coating.

[0059] The bottom layer 2 also includes carboxylated styrene-butadiene rubber in an amount of 1.5 parts.

[0060] The photosensitive layer 3 also includes vanadium developer in an amount of 6 parts.

[0061] A protective layer 4 is coated on the outer side of the photosensitive layer 3 , and the thickness of the protective layer 4 is 1.8 μm.

[0062] like Figure 1 As shown, the film protective layer 4 includes the following raw materials in parts by weight: 20 parts of polyurethane, 7 parts of chlorinated polypropylene, 3 parts of polymethyl methacrylate, and an appropriate amount of water.

[0063] When the protective layer 4 is used, polyurethane, chlorinated polypropylene and polymethyl methacrylate are weighed respectively, and then polyurethane is added into water and stirred evenly, and then chlorinated polypropylene and polymethyl methacrylate are added in sequence and stirred evenly before coating.

[0064] like Figure 1 As shown, the other side of the film substrate 1 corresponding to the inner layer 2 is coated with the inner layer 2.

[0065] like Figure 1 As shown, the film further includes an outer layer 5; the outer layer 5 is arranged on the inner layer 2 at a side away from the film substrate 1; the outer layer 5 has a thickness of 2 μm.

[0066] The outer layer 5 comprises the following raw materials in parts by weight: 12 parts of epoxy resin, 1.3 parts of carboxylated styrene-butadiene rubber, 6 parts of silica sol, 4 parts of ethylene oxide, and an appropriate amount of water.

[0067] Example 4

[0068] A coating method for medical film, such as Figure 1 As shown, the following steps are included:

[0069] An inner layer 2 is coated on one side of the film substrate 1, and the thickness of the inner layer 2 is 1.5 μm;

[0070] A photosensitive layer 3 is coated on the side of the inner layer 2 away from the film substrate 1, and the thickness of the photosensitive layer 3 is 20 μm;

[0071] The bottom layer 2 comprises the following raw materials by weight: 17 parts of polyacrylate, 12 parts of epoxy resin, 5 parts of silica sol, and an appropriate amount of water; when used, the polyacrylate, epoxy resin, and silica sol are weighed separately, added into water, stirred evenly, and then used for coating;

[0072] The photosensitive layer 3 comprises the following raw materials in parts by weight: 41 parts of silver halide, 90 parts of gelatin, and an appropriate amount of water. When in use, the silver halide and gelatin are weighed separately, added into water, stirred evenly, and then used for coating.

[0073] The bottom layer 2 also includes carboxylated styrene-butadiene rubber in an amount of 2 parts.

[0074] The photosensitive layer 3 also includes vanadium developer in an amount of 6 parts.

[0075] A protective layer 4 is coated on the outer side of the photosensitive layer 3, and the thickness of the protective layer 4 is 1.5 μm.

[0076] like Figure 1 As shown, the film protective layer 4 includes the following raw materials in parts by weight: 23 parts of polyurethane, 8 parts of chlorinated polypropylene, 3 parts of polymethyl methacrylate, and an appropriate amount of water.

[0077] When the protective layer 4 is used, polyurethane, chlorinated polypropylene and polymethyl methacrylate are weighed respectively, and then polyurethane is added into water and stirred evenly, and then chlorinated polypropylene and polymethyl methacrylate are added in sequence and stirred evenly before coating.

[0078] like Figure 1 As shown, the other side of the film substrate 1 corresponding to the inner layer 2 is coated with the inner layer 2.

[0079] like Figure 1 As shown, the film further includes an outer layer 5; the outer layer 5 is arranged on the inner layer 2 at a side away from the film substrate 1; the thickness of the outer layer 5 is 2 μm.

[0080] The outer layer 5 comprises the following raw materials in parts by weight: 13 parts of epoxy resin, 1.2 parts of carboxylated styrene-butadiene rubber, 5 parts of silica sol, 4 parts of ethylene oxide, and an appropriate amount of water.

[0081] Example 5

[0082] A coating method for medical film, such as Figure 1 As shown, the following steps are included:

[0083] An inner layer 2 is coated on one side of the film substrate 1, and the thickness of the inner layer 2 is 0.9 μm;

[0084] A photosensitive layer 3 is coated on the side of the inner layer away from the film substrate 1, and the thickness of the photosensitive layer 3 is 20 μm;

[0085] The bottom layer 2 comprises the following raw materials by weight: 16 parts of polyacrylate, 13 parts of epoxy resin, 5 parts of silica sol, and an appropriate amount of water; when used, the polyacrylate, epoxy resin, and silica sol are weighed separately, added into water, stirred evenly, and then used for coating;

[0086] The photosensitive layer 3 comprises the following raw materials in parts by weight: 40 parts of silver halide, 88 parts of gelatin, and an appropriate amount of water. When in use, the silver halide and gelatin are weighed separately, added into water, stirred evenly, and then used for coating.

[0087] The bottom layer 2 also includes carboxylated styrene-butadiene rubber in an amount of 1.6 parts.

[0088] The photosensitive layer 3 also includes a vanadium developer in an amount of 7 parts.

[0089] A protective layer 4 is coated on the outer side of the photosensitive layer 3 , and the thickness of the protective layer 4 is 72 μm.

[0090] like Figure 1 As shown, the film protective layer 4 includes the following raw materials in parts by weight: 20 parts of polyurethane, 7 parts of chlorinated polypropylene, 3 parts of polymethyl methacrylate, and an appropriate amount of water.

[0091] When the protective layer 4 is used, polyurethane, chlorinated polypropylene and polymethyl methacrylate are weighed respectively, and then polyurethane is added into water and stirred evenly, and then chlorinated polypropylene and polymethyl methacrylate are added in sequence and stirred evenly before coating.

[0092] like Figure 1 As shown, the other side of the film substrate corresponding to the inner layer 2 is coated with the inner layer 2.

[0093] like Figure 1 As shown, the film further includes an outer layer 5; the outer layer 5 is arranged on the inner layer 2 at a side away from the film substrate 1; the thickness of the outer layer 5 is 2.3 μm.

[0094] The outer layer comprises the following raw materials in parts by weight: 14 parts of epoxy resin, 1.4 parts of carboxylated styrene-butadiene rubber, 8 parts of silica sol, 5 parts of ethylene oxide, and an appropriate amount of water; when the outer layer is used, each raw material is weighed, added into water, stirred evenly, and then the coating process can be carried out.

[0095] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the statement "including an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0096] 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 protection scope of the present invention.

Claims

1. A method for coating a medical film, characterized in that: The following steps are involved: An inner layer (2) is coated on one side of the film substrate (1), wherein the thickness of the inner layer (2) is 0.5-1.5 μm; A photosensitive layer (3) is coated on the side of the inner layer (2) away from the film substrate (1), wherein the thickness of the photosensitive layer (3) is 13-22 μm; The bottom layer (2) comprises the following raw materials in parts by weight: 10-20 parts of polyacrylate, 10-15 parts of epoxy resin, 3-8 parts of silica sol, and an appropriate amount of water; when used, the polyacrylate, epoxy resin, and silica sol are weighed separately, added into water, stirred evenly, and then used for coating; The photosensitive layer (3) comprises the following raw materials in parts by weight: 30-45 parts of silver halide, 75-95 parts of gelatin, and an appropriate amount of water. When used, the silver halide and gelatin are weighed separately, added into water, stirred evenly, and then used for coating.

2. A method for coating a medical film according to claim 1, characterized in that: The bottom layer (2) also includes carboxylated styrene-butadiene rubber in an amount of 0.5-2 parts.

3. A coating method for a medical film according to claim 2, characterized in that: The photosensitive layer (3) also includes a vanadium developer in an amount of 4-8 parts.

4. A method for coating a medical film according to claim 3, characterized in that: A protective layer (4) is coated on the outer side of the photosensitive layer (3), and the thickness of the protective layer (4) is 1.5-2 μm.

5. A method for coating a medical film according to any one of claims 1 to 4, characterized in that: The protective layer (4) comprises the following raw materials in parts by weight: 15-25 parts of polyurethane, 5-9 parts of chlorinated polypropylene, 2-4 parts of polymethyl methacrylate, and an appropriate amount of water.

6. A method for coating a medical film according to claim 5, characterized in that: When the protective layer (4) is used, polyurethane, chlorinated polypropylene and polymethyl methacrylate are weighed respectively, and then polyurethane is added into water and stirred evenly, and then chlorinated polypropylene and polymethyl methacrylate are added in sequence and stirred evenly before coating.

7. The method for coating a medical film according to claim 1, characterized in that: The other side of the film substrate (1) corresponding to the inner layer (2) is coated with the inner layer (2).

8. The method for coating a medical film according to claim 2, characterized in that: Also includes an outer layer (5); The outer layer (5) is arranged on the inner layer (2) at a side away from the film substrate (1); The thickness of the outer layer (5) is 1.5-2.5 μm.

9. A method for coating a medical film according to claim 8, characterized in that: The outer layer (5) comprises the following raw materials in parts by weight: 8-16 parts of epoxy resin, 0.8-1.5 parts of carboxylated styrene-butadiene rubber, 3-8 parts of silica sol, 3-5 parts of ethylene oxide, and an appropriate amount of water.

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