A sublimation-proof silica gel printing lettering film and a preparation method thereof

Abstract

This invention relates to the technical field of silicone-based printing materials for patterns or lettering, and particularly to an anti-sublimation silicone printing lettering film and its preparation method, comprising the following steps: Step 1, coating an ink-absorbing layer on the matte side of a matte PET release film and drying it; Step 2, coating a coloring layer on the surface of the ink-absorbing layer and drying it; Step 3, coating an anti-sublimation layer on the surface of the coloring layer and drying it; Step 4, coating a cross-linking layer on the surface of the anti-sublimation layer and drying it; Step 5, coating a hot melt adhesive film on the surface of the cross-linking layer and drying it to obtain the anti-sublimation silicone printing lettering film. In summary, this printing lettering film can possess high elasticity, high vibrancy and color, high abrasion resistance, high washability, and high environmental safety. It can also prevent fabric color sublimation migration to the surface of the lettering film, isolating or absorbing sublimated dyes, making the film surface invisible of color variations or fabric color penetration.

Description

Technical Field

[0001] This invention relates to the technical field of material films for printing patterns or lettering using silicone, and in particular to an anti-sublimation silicone printing lettering film and its preparation method. Background Technology

[0002] Heat transfer printing is an emerging printing process. This process involves first printing a transfer film, where the image or text is printed onto the surface of a thin film. Then, using heat transfer equipment, the image or text on the film is transferred onto the substrate through heating and pressure. It is widely used in the decoration of clothing, T-shirts, advertising shirts, sportswear, care labels, gloves, shoes, hats, bags, and textiles.

[0003] With the improvement of people's living standards and aesthetic values, and the growing desire for a higher quality of life, decorative materials for clothing have begun to flourish, especially heat transfer decorative films. Due to their simple and convenient operation, high flexibility in colors and patterns, and ability to meet various clothing design requirements, they have been widely promoted, and personalized decorative elements are also very popular with consumers. Currently, decorative film products on the market are mainly of two types: PVC and TPU. In practical applications, it has been found that on some polyester, cotton, nylon, and blended fabrics, especially dark-colored fabrics, the fabric color sublimates and migrates to the surface of the decorative film after it is applied, resulting in yellow spots, black spots, or other discolored spots. This seriously affects the appearance quality of the product and the decorative effect of the clothing.

[0004] For example, Chinese patent document CN107443945B discloses an elastic heat transfer lettering film, including a substrate, a protective back coating liquid, a release layer pressure-sensitive adhesive, a color layer ink, and an adhesive layer hot melt adhesive. The formula of the protective back coating liquid is: 14 parts amino resin, 4 parts acrylic resin, 3 parts silica, 1 part amino resin crosslinking agent, and 78 parts mixed solvent; the formula of the release layer pressure-sensitive adhesive is: 10 parts silicone pressure-sensitive adhesive, 15 parts silicone, 2 parts platinum catalyst, and 73 parts 120# solvent; the formula of the color layer ink is: 25 parts high-elasticity high-temperature resistant TPU resin, 10 parts color powder, 3 parts wetting, dispersing, and leveling aid, and 62 parts mixed solvent; the formula of the adhesive layer hot melt adhesive is: 65 parts high-elasticity low-temperature TPU resin, 30 parts high melt index low-temperature TPU resin, and 5 parts TPU opening agent.

[0005] In addition, lettering films made of PVC or TPU materials are prone to problems such as poor weather resistance, extremely poor anti-sublimation effect, poor tensile strength and resilience, easy deformation, and poor wash fastness of printed colors, which are easy to fade. Summary of the Invention

[0006] To overcome the shortcomings mentioned above, the present invention aims to provide a technical solution that can solve the above problems.

[0007] This invention provides a method for preparing an anti-sublimation silicone printing lettering film, comprising the following steps: Step 1, coating an ink-absorbing layer on the matte side of a matte PET release film and drying it; Step 2, coating a coloring layer on the surface of the ink-absorbing layer and drying it; Step 3, coating an anti-sublimation layer on the surface of the coloring layer and drying it; Step 4, coating a crosslinking layer on the surface of the anti-sublimation layer and drying it; Step 5, coating a hot melt adhesive film on the surface of the crosslinking layer and drying it to obtain the anti-sublimation silicone printing lettering film.

[0008] As a further aspect of the present invention: In step one, the ink-absorbing layer is coated using a 250-mesh quadrilateral anilox roller, wherein the coating speed is 35-45 meters / minute, the coating thickness is 3-5 grams / square meter, the baking time is 6-10 minutes, and the oven temperature is set in segments from 130°C to 190°C.

[0009] As a further aspect of the present invention: In step two, the coloring layer is coated using a comma-shaped doctor blade coater, wherein the coating speed is 25-35 meters / minute, the coating thickness is 0.4-0.8 micrometers, the baking time is 6-10 minutes, and the oven temperature is set in segments from 60°C to 200°C.

[0010] As a further aspect of the present invention: In step three, the anti-sublimation layer is coated using a comma-shaped doctor blade coater, wherein the coating speed is 25-35 meters / minute, the coating thickness is 0.2-0.7 micrometers, the baking time is 6-10 minutes, and the oven temperature is set in segments from 60°C to 200°C.

[0011] As a further aspect of the present invention: In step four, the bridging layer is coated using a 150-mesh quadrilateral anilox roller, wherein the coating speed is 6-12 meters / minute, the coating thickness is 7-14 grams / square meter, the baking time is 6-10 minutes, and the oven temperature is set in segments from 130°C to 190°C.

[0012] As a further aspect of the present invention: before step one, a PET film is used as a substrate, and a matte resin SS646 is coated on its surface using a 200-mesh quadrilateral anilox roller, wherein the coating speed is 30-50 meters / minute, the coating thickness is 3-7 grams / square meter, the baking time is 2-6 minutes, and the oven temperature is set in stages from 100°C to 170°C; after coating, it is cured for more than 72 hours, and after curing, a matte PET film is obtained.

[0013] As a further aspect of the present invention: a release resin SS501 is coated onto the matte surface of a matte PET film using a 200-mesh quadrilateral anilox roller, wherein the coating speed is 40-60 m / min, the coating thickness is 3-7 g / m², the baking time is 6-10 minutes, and the oven temperature is set in segments from 130°C to 180°C, and a matte PET release film is obtained after drying.

[0014] As a further aspect of the present invention: after step five, an adhesive positioning film is coated onto the surface of the hot melt adhesive film layer using a laminating machine.

[0015] The present invention also provides an anti-sublimation silicone printing lettering film, comprising a silicone printing lettering film prepared using the above-mentioned method for preparing an anti-sublimation silicone printing lettering film, wherein the silicone printing lettering film comprises an ink-absorbing layer, a coloring layer, an anti-sublimation layer, a crosslinking layer and a hot melt adhesive film layer stacked sequentially from top to bottom.

[0016] As a further aspect of the present invention: the anti-sublimation layer comprises the following components by weight: 75-85 parts methyl vinyl, 12-17 parts activated carbon, 2-5 parts siloxane, and 1-3 parts curing agent.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. By introducing silicone material into the coloring layer, the ink can be printed better on the lettering film, making the lettering film highly elastic, highly vibrant and colorful, highly wear-resistant, highly washable, and highly environmentally friendly and safe.

[0019] 2. Furthermore, by setting an anti-sublimation layer, the sublimation of fabric color is prevented from migrating to the surface of the lettering film. This layer can isolate or absorb sublimated dye, making the printed lettering film surface free of shading or fabric color penetration.

[0020] 3. Coating methods such as anilox roller coating, comma blade coating, and laminating machine coating are used to complete each coating process with appropriate process parameters, ensuring precise control, uniform coating amount, and proper methods.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the lettering film of the present invention;

[0024] Figure 2 This is a schematic diagram of the release film and lettering film of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the self-adhesive positioning film and the lettering film of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the matte PET release film of the present invention;

[0027] Figure 5 This is a schematic diagram of the preparation process of the present invention.

[0028] The reference numerals and names in the figure are as follows:

[0029] 10- Matte PET release film; 11- PET film; 12- Matte base resin; 13- Release resin; 20- Ink absorption layer; 30- Coloring layer; 40- Anti-sublimation layer; 50- Crosslinking layer; 60- Hot melt adhesive film layer; 70- Self-adhesive positioning film. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 5 In Embodiment 1 of the present invention, a method for preparing an anti-sublimation silicone printing lettering film includes the following steps: Step 1, coating an ink-absorbing layer 20 on the matte side of a matte PET release film 10 and drying it; Step 2, coating a coloring layer 30 on the surface of the ink-absorbing layer 20 and drying it; Step 3, coating an anti-sublimation layer 40 on the surface of the coloring layer 30 and drying it; Step 4, coating a crosslinking layer 50 on the surface of the anti-sublimation layer 40 and drying it; Step 5, coating a hot melt adhesive film layer 60 on the surface of the crosslinking layer 50 and drying it to obtain the anti-sublimation silicone printing lettering film.

[0032] Specifically, to identify and differentiate the origin of goods, certain markings or symbols are usually added to them. For example, many products bear their own brand trademarks, some in words and others in images. For clothing, footwear, and other goods that come into contact with the body, the addition of trademarks must also consider health factors, as well as the need for increased washability due to the frequent washing required. While existing needle and thread sewing technology offers excellent results in terms of health and washing considerations, its production cost is relatively high. Therefore, many clothing products still use adhesive methods to fix trademarks, such as the commonly used printed lettering film.

[0033] Secondly, to address some shortcomings of traditional lettering films made of PVC or TPU materials, a superior lettering film can be obtained by adding silicone material to the coloring layer 30. Moreover, the silicone material also has a soft feel, which can better highlight the quality of high-end products.

[0034] Furthermore, for some polyester, cotton, nylon, and blended fabrics, especially dark-colored fabrics, the color of the fabric will sublimate and migrate to the surface of the lettering film after the lettering film is pressed on. An anti-sublimation layer 40 can be set up, and silicone and activated carbon materials can be combined to isolate or absorb the sublimated pigments, so that the pattern color on the surface of the lettering film remains bright.

[0035] In step one, the ink-absorbing layer 20 is coated using a 250-mesh quadrilateral anilox roller, with a coating speed of 35-45 meters per minute, a coating thickness of 3-5 grams per square meter, a baking time of 6-10 minutes, and a drying tunnel temperature set in segments of 130°C-190°C.

[0036] Specifically, the ink-absorbing layer 20 is formed by coating with environmentally friendly nano-ink-absorbing material SS647. The purpose of coating the ink-absorbing layer 20 is to ensure good ink application during inkjet printing or offset printing, preventing ink spread and accumulation, and ensuring vibrant colors in the pattern.

[0037] In step two, the coloring layer 30 is coated using a comma-shaped doctor blade coater, wherein the coating speed is 25-35 meters / minute, the coating thickness is 0.4-0.8 micrometers, the baking time is 6-10 minutes, and the oven temperature is set in segments from 60℃ to 200℃.

[0038] Specifically, environmentally friendly silicone SS513 is used to coat the colored layer 30, which can be made of silicone material. When printing and engraving, the surface of the colored layer 30 can be printed using various methods, such as UV offset printing, UV inkjet printing, mild solvent inkjet printing, and screen printing, all of which can be perfectly combined, and its wash fastness can reach level 4 or above.

[0039] In step three, the anti-sublimation layer 40 is coated using a comma-shaped doctor blade coater, wherein the coating speed is 25-35 meters / minute, the coating thickness is 0.2-0.7 micrometers, the baking time is 6-10 minutes, and the oven temperature is set in segments from 60℃ to 200℃.

[0040] Specifically, an anti-sublimation layer 40 is formed by coating with environmentally friendly silicone SS538. The anti-sublimation layer 40 can be made by combining silicone and activated carbon materials, preferably using nano-grade silicone and activated carbon materials. This allows the anti-sublimation layer 40 to have an adsorption function under certain temperature or humidity conditions, which can absorb and isolate sublimation dyes on the fabric. This prevents the lettering film from showing the yin-yang colors or colors that have penetrated the fabric on the pattern surface, thereby improving the aesthetics of the pattern.

[0041] In step four, the bridging layer 50 is coated using a 150-mesh quadrilateral anilox roller, with a coating speed of 6 to 12 meters per minute, a coating thickness of 7 to 14 grams per square meter, a baking time of 6 to 10 minutes, and a drying tunnel temperature set in segments of 130°C to 190°C.

[0042] Specifically, an environmentally friendly silicone SS662 is used to coat a bridging layer 50. The purpose of coating the bridging layer 50 is to ensure that the hot melt adhesive film layer 60 applied later can be perfectly bonded to the anti-sublimation layer 40 in the front section, so that the water wash fastness of the silicone printing lettering film can reach level 5 or above, and ensure that no delamination will occur after multiple washes in hot water above 60 degrees Celsius.

[0043] In step five, the hot melt adhesive film layer 60 is coated using a laminating machine, wherein the coating temperature of the laminating machine is 170–190°C.

[0044] Specifically, an environmentally friendly hot melt adhesive film 2109 can be used to coat the hot melt adhesive film layer 60, preferably using a laminating machine in the prior art.

[0045] like Figure 4 As shown, preferably, before step one, a PET film 11 is used as a substrate, and a matte base resin 12SS646 is coated onto its surface using a 200-mesh quadrilateral anilox roller. The coating speed is 30-50 m / min, the coating thickness is 3-7 g / m², the baking time is 2-6 minutes, and the oven temperature is set in stages from 100℃ to 170℃. After coating, it is cured for more than 72 hours to obtain a matte PET film 11. A release resin 13SS501 is then coated onto the matte surface of the matte PET film 11 using a 200-mesh quadrilateral anilox roller. The coating speed is 40-60 m / min, the coating thickness is 3-7 g / m², the baking time is 6-10 minutes, and the oven temperature is set in stages from 130℃ to 180℃. After drying, a matte PET release film 10 is obtained.

[0046] Specifically, after the matte base coat is applied, the substrate must be cured for at least 72 hours to ensure that the matte base resin 12SS646 is fully dry. The purpose of applying the matte base coat is to ensure that the product surface is matte, reflecting a high-end and luxurious visual effect, while also making the surface smooth to the touch, like the feel of a baby's skin. The purpose of applying the release resin 13 is to ensure that the product can be peeled off from the PET film 11 during subsequent processing.

[0047] like Figure 3 As shown, preferably, after step five, a self-adhesive positioning film 70 is coated onto the surface of the hot melt adhesive film layer 60 using a laminating machine. Specifically, a high-viscosity silicone-specific self-adhesive positioning film 70 can also be coated onto the surface of the hot melt adhesive film layer 60, which facilitates the user in flattening the printed lettering film during the subsequent printing process and in facilitating positioning operations such as laser cutting of the printed lettering film.

[0048] Embodiment 2 of the present invention

[0049] like Figure 5 As shown, a preferred method for preparing an anti-sublimation silicone printing lettering film includes the following steps:

[0050] Step 1: Apply environmentally friendly nano-ink-absorbing layer 20 material SS647 to the matte side of the matte PET release film 10 to form the ink-absorbing layer 20, and then dry it. The ink-absorbing layer 20 is coated using a 250-mesh quadrilateral anilox roller, with a coating speed of 40 meters / minute, a coating thickness of 4 grams / square meter, a baking time of 8 minutes, and the oven temperature is set in segments from 150 to 180°C.

[0051] Step 2: Apply environmentally friendly silicone SS513 to the surface of the ink absorption layer 20 to form a coloring layer 30, and then dry it. The coloring layer 30 is applied using a comma-shaped doctor blade coater, with a coating speed of 25-35 meters / minute, a coating thickness of 0.5-0.6 micrometers, a baking time of 8 minutes, and a drying tunnel temperature set in segments from 80℃ to 180℃.

[0052] Step 3: Apply environmentally friendly silicone SS538 to the surface of the coloring layer 30 to form an anti-sublimation layer 40, and then dry it. The anti-sublimation layer 40 is applied using a comma-shaped doctor blade coater, with a coating speed of 25-35 meters / minute, a coating thickness of 0.4-0.5 micrometers, a baking time of 8 minutes, and a drying tunnel temperature set in segments from 80℃ to 180℃.

[0053] Step 4: Apply environmentally friendly silicone SS662 to the surface of the anti-sublimation layer 40 to form a crosslinking layer 50, and then dry it. The crosslinking layer 50 is coated using a 150-mesh quadrilateral anilox roller, with a coating speed of 9 meters / minute, a coating thickness of 10 grams / square meter, a baking time of 8 minutes, and the oven temperature is set in segments from 150℃ to 160℃.

[0054] Step 5: Apply environmentally friendly hot melt adhesive film 2109 to the surface of the bridging layer 50 to form a hot melt adhesive film layer 60. After drying, an anti-sublimation silicone printing lettering film is obtained. The hot melt adhesive film layer 60 is coated using a laminating machine, wherein the coating temperature of the laminating machine is 175℃~185℃.

[0055] Specifically, it is understandable that after the above preparation steps, further steps such as quality confirmation, slitting, winding, and packaging for shipment can be performed. These steps are all existing production steps and will not be elaborated upon here. The anti-sublimation layer 40 comprises the following components by weight: 75-85 parts methyl vinyl, 12-17 parts activated carbon, 2-5 parts siloxane, and 1-3 parts curing agent. The coloring layer 30 comprises the following components by weight: 68-80 parts methyl vinyl, 17-25 parts titanium dioxide, 2-4 parts siloxane, and 1-3 parts curing agent. The ink-absorbing layer 20 comprises the following components by weight: 76-88 parts polypropylene, 10-18 parts silica, 1-3 parts siloxane, and 1-3 parts curing agent.

[0056] Embodiment 3 of the present invention

[0057] like Figure 1 As shown, an anti-sublimation silicone printing lettering film includes a silicone printing lettering film prepared using the above-described preparation method, comprising an ink-absorbing layer 20, a coloring layer 30, an anti-sublimation layer 40, a crosslinking layer 50, and a hot melt adhesive film layer 60 sequentially attached together.

[0058] Specifically, Embodiment 3 is a state of the finished printed lettering film, which is also the lowest layer state. It is a state where the matte PET release film 10 has been peeled off according to user requirements. Users can directly print patterns on the machine, thereby reducing production steps and saving production costs. The anti-sublimation layer 40 may include the following components by weight: 81 parts methyl vinyl, 14 parts activated carbon, 3 parts siloxane, and 2 parts curing agent. The coloring layer 30 may include the following components by weight: 74 parts methyl vinyl, 21 parts titanium dioxide, 3 parts siloxane, and 2 parts curing agent. The ink-absorbing layer 20 includes the following components by weight: 82 parts polypropylene, 14 parts silica, 2 parts siloxane, and 2 parts curing agent.

[0059] Embodiment 4 of the present invention

[0060] like Figure 2 As shown, an anti-sublimation silicone printing lettering film includes a silicone printing lettering film prepared using the above-described preparation method, comprising a matte PET release film 10, an ink-absorbing layer 20, a coloring layer 30, an anti-sublimation layer 40, a crosslinking layer 50, and a hot melt adhesive film layer 60 sequentially attached together.

[0061] Specifically, Embodiment 4 represents one of the most common states of the printed lettering film in its factory-produced form. It does not involve peeling off the matte PET release film 10, resulting in better stability, no need for special storage conditions, and greater versatility, making it suitable for a wider range of printing equipment. The anti-sublimation layer 40 may include the following components by weight: 75 parts methyl vinyl, 17 parts activated carbon, 5 parts siloxane, and 3 parts curing agent. The coloring layer 30 may include the following components by weight: 68 parts methyl vinyl, 25 parts titanium dioxide, 4 parts siloxane, and 3 parts curing agent. The ink-absorbing layer 20 may include the following components by weight: 76 parts polypropylene, 118 parts silica, 3 parts siloxane, and 3 parts curing agent.

[0062] Embodiment 5 of the present invention

[0063] like Figure 3 As shown, an anti-sublimation silicone printing lettering film includes a silicone printing lettering film prepared using the above-described preparation method, comprising a matte PET release film 10, an ink-absorbing layer 20, a coloring layer 30, an anti-sublimation layer 40, a crosslinking layer 50, a hot melt adhesive film layer 60, and an adhesive positioning film 70, which are sequentially attached together.

[0064] Specifically, Embodiment 5 describes one state of the finished printed lettering film. According to customer requirements, a layer of self-adhesive positioning film 70 is applied to the surface of the hot melt adhesive film layer 60. This added self-adhesive positioning film 70 assists in leveling or positioning during printing or cutting, thereby accelerating production efficiency and improving product quality. The anti-sublimation layer 40 may include the following components by weight: 85 parts methyl vinyl, 12 parts activated carbon, 2 parts siloxane, and 1 part curing agent. The coloring layer 30 may include the following components by weight: 80 parts methyl vinyl, 17 parts titanium dioxide, 2 parts siloxane, and 1 part curing agent. The ink-absorbing layer 20 may include the following components by weight: 88 parts polypropylene, 10 parts silica, 1 part siloxane, and 1 part curing agent.

[0065] In addition, the curing agent mentioned above may include one or a mixture of at least two of 2-ethyl-4-methylimidazole, 2-phenylimidazole, 2-isopropylimidazole, tetrachlorophthalic anhydride, hexahydrophthalic anhydride, triethylenetetramine, dimethylaminopropylamine, and diethylaminopropylamine.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A method for preparing an anti-sublimation silicone printing lettering film, characterized in that, Includes the following steps: Step 1: Apply an ink-absorbing layer to the matte side of the matte PET release film and then dry it. Step 2: Apply a coloring layer to the surface of the ink-absorbing layer and then dry it. Step 3: Apply an anti-sublimation layer to the surface of the coloring layer and then dry it. Step 4: Apply a bridging layer to the surface of the anti-sublimation layer and then dry it. Step 5: Apply a hot melt adhesive film to the surface of the bridging layer and dry it to obtain an anti-sublimation silicone printing lettering film. The thickness of the anti-sublimation layer is 0.2–0.7 micrometers; The coloring layer comprises the following components by weight: 68-80 parts methyl vinyl, 17-25 parts titanium dioxide, 2-4 parts siloxane, and 1-3 parts curing agent; The anti-sublimation layer comprises the following components by weight: 75-85 parts methyl vinyl, 12-17 parts activated carbon, 2-5 parts siloxane, and 1-3 parts curing agent.

2. The method for preparing an anti-sublimation silicone printing lettering film according to claim 1, characterized in that, In step one, the ink-absorbing layer is coated using a 250-mesh quadrilateral anilox roller, with a coating speed of 35-45 meters per minute, a coating thickness of 3-5 grams per square meter, a baking time of 6-10 minutes, and a drying tunnel temperature set in segments from 130°C to 190°C.

3. The method for preparing an anti-sublimation silicone printing lettering film according to claim 1, characterized in that, In step two, the coloring layer is applied using a comma-shaped doctor blade coater, with a coating speed of 25-35 meters per minute, a coating thickness of 0.4-0.8 micrometers, a baking time of 6-10 minutes, and a drying tunnel temperature set in segments from 60°C to 200°C.

4. The method for preparing an anti-sublimation silicone printing lettering film according to claim 1, characterized in that, In step three, the anti-sublimation layer is applied using a comma-shaped doctor blade coater, with a coating speed of 25-35 meters per minute, a baking time of 6-10 minutes, and a drying tunnel temperature set in segments from 60°C to 200°C to form a uniform adsorption and isolation layer that absorbs and isolates the sublimation dyes on the fabric.

5. The method for preparing an anti-sublimation silicone printing lettering film according to claim 1, characterized in that, In step four, the bridging layer is coated using a 150-mesh quadrilateral anilox roller, with a coating speed of 6-12 meters per minute, a coating thickness of 7-14 grams per square meter, a baking time of 6-10 minutes, and a drying tunnel temperature set in segments from 130°C to 190°C.

6. The method for preparing an anti-sublimation silicone printing lettering film according to claim 1, characterized in that, Before step one, a PET film is used as the substrate, and a matte resin is coated on its surface using a 200-mesh quadrilateral anilox roller. The coating speed is 30-50 meters / minute, the coating thickness is 3-7 grams / square meter, the baking time is 2-6 minutes, and the oven temperature is set in stages from 100℃ to 170℃. After coating, the film is cured for more than 72 hours to obtain a matte PET film.

7. The method for preparing an anti-sublimation silicone printing lettering film according to claim 6, characterized in that, Release resin is coated onto the matte surface of a matte PET film using a 200-mesh quadrilateral anilox roller. The coating speed is 40–60 m / min, the coating thickness is 3–7 g / m², the baking time is 6–10 minutes, and the oven temperature is set in stages from 130°C to 180°C. After drying, a matte PET release film is obtained.

8. The method for preparing an anti-sublimation silicone printing lettering film according to claim 1, characterized in that, After step five, an adhesive positioning film is applied to the surface of the hot melt adhesive film layer using a laminating machine.

9. A type of anti-sublimation silicone printing lettering film, characterized in that, The invention includes a silicone printing lettering film prepared using the method for preparing an anti-sublimation silicone printing lettering film according to any one of claims 1-8, wherein the silicone printing lettering film comprises an ink-absorbing layer, a coloring layer, an anti-sublimation layer, a crosslinking layer, and a hot melt adhesive film layer stacked sequentially from top to bottom.

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