Transfer film with digitally printed pattern

Abstract

The utility model discloses a kind of transfer film with digital printing pattern, from top to bottom sequentially include: base film layer, release layer, bearing layer group, digital graphics layer, connecting layer and hot melt adhesive layer, digital graphics layer is set to the lower end surface of bearing layer group by digital printing or digital spraying, connecting layer connects hot melt adhesive layer and digital graphics layer, digital graphics layer can be variable graphics and color is used flexibly, without plate making, production preparation is flexible, greatly facilitate the production requirement of small batch or short construction period, by setting bearing layer group for the spraying or printing of digital graphics layer, the stability of the graphics of digital graphics layer can be improved, and by connecting layer connecting hot melt adhesive layer and digital graphics layer, the adhesion strength between ink and hot melt adhesive layer is improved, reduce the case that digital graphics falls off or deforms when heat transfer printing occurs.

Description

Technical Field

[0001] This utility model relates to the field of transfer film technology, and in particular to a transfer film with digitally printed patterns. Background Technology

[0002] Traditional heat transfer film manufacturing processes, such as gravure printing, while suitable for mass production, have limitations such as long delivery cycles, high costs, and inability to meet the needs of small-batch customization and variable information printing. The continuous advancement of digital printing technology has provided technical support for the innovation of heat transfer films. Digital printing machines can achieve high-precision printing and easily realize the printing of infinitely variable data, such as QR codes, serial numbers, and personalized patterns. However, in practical applications, heat transfer films require heat transfer, and digital patterns have poor stability during the heat transfer process, making them prone to peeling, deformation, and other problems. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a transfer film with digitally printed patterns.

[0004] According to a first aspect of the present invention, a transfer film with a digitally printed pattern comprises, from top to bottom: a base film layer, a release layer, a carrier layer assembly, a digital graphic layer, a connecting layer, and a hot melt adhesive layer. The digital graphic layer is disposed on the lower end face of the carrier layer assembly by digital printing or digital spraying, and the connecting layer connects the hot melt adhesive layer and the digital graphic layer.

[0005] The transfer film with digitally printed patterns according to the embodiments of the present utility model has at least the following beneficial effects: by setting a carrier layer group for spraying or printing the digital graphic layer, the stability of the graphic in the digital graphic layer can be improved, and by connecting the hot melt adhesive layer and the digital graphic layer through the connecting layer, the adhesion strength between the ink and the hot melt adhesive layer is improved, and the occurrence of digital graphic peeling or deformation during heat transfer is reduced.

[0006] According to some embodiments of the present invention, the carrier layer group includes a protective layer and a digital base layer. The protective layer is located between the release layer and the digital base layer, and the digital graphic layer is applied to the lower end surface of the digital base layer by digital printing or digital spraying.

[0007] According to some embodiments of this utility model, the protective layer is a modified acrylic resin layer.

[0008] According to some embodiments of this utility model, the digital base layer is a water-soluble polymer layer.

[0009] According to some embodiments of the present invention, the connecting layer is a polyamide layer.

[0010] According to some embodiments of this utility model, the combined thickness of the connecting layer and the hot melt adhesive layer is 2μm-4μm.

[0011] According to some embodiments of the present invention, the transfer film further includes an anti-sticking layer, which is disposed above the base film layer.

[0012] According to some embodiments of this utility model, the anti-stick layer is a polyethylene wax layer.

[0013] According to some embodiments of the present invention, the base film layer is a PET film layer.

[0014] According to some embodiments of the present invention, the thickness of the base film layer is 12μm-50μm. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0016] Figure 1 This is a cross-sectional structural diagram of a transfer film with digitally printed patterns according to an embodiment of the present invention.

[0017] Figure label:

[0018] Base film layer 100, release layer 200, carrier layer group 300, protective layer 310, digital base coating layer 320, digital graphic layer 400, connecting layer 500, hot melt adhesive layer 600, anti-stick layer 700. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] The following is for reference. Figure 1 This invention describes a transfer film with a digitally printed pattern according to an embodiment of the present invention.

[0024] like Figure 1 As shown, the transfer film with digitally printed patterns according to an embodiment of the present invention includes, from top to bottom: a base film layer 100, a release layer 200, a carrier layer group 300, a digital graphic layer 400, a connecting layer 500, and a hot melt adhesive layer 600. The digital graphic layer 400 is disposed on the lower end surface of the carrier layer group 300 by digital printing or digital spraying, and the connecting layer 500 connects the hot melt adhesive layer 600 and the digital graphic layer 400.

[0025] By setting up a carrier layer group 300 for spraying or printing on the digital graphic layer 400, the stability of the graphics on the digital graphic layer 400 can be improved. Furthermore, by connecting the hot melt adhesive layer 600 and the digital graphic layer 400 through the connecting layer 500, the adhesion strength between the ink and the hot melt adhesive layer 600 can be improved, reducing the occurrence of digital graphics falling off or deforming during heat transfer.

[0026] Specifically, the support layer 300 is used to support and protect the digital graphic layer 400, reducing the occurrence of graphic deformation in the digital graphic layer 400.

[0027] In traditional processes, the adhesion between digital graphics and hot melt adhesive layers is poor. After the hot melt adhesive is heat-transferred to the product, it is easy for it to delaminate or detach. With the addition of the connecting layer 500, the connecting layer 500 serves as a bridging layer between the hot melt adhesive layer 600 and the digital graphics layer 400, thereby improving the stability of the layer structure and making it less likely for the graphics to fall off or deform.

[0028] The images and text on the transfer film of this utility model are formed through digital printing / spraying processes, which allows for more flexible color matching, enabling rich color transitions and delicate color gradations. It can accurately reproduce the colors of the designed images with high color fidelity and can also display patterns (or variable information graphics) in millions of colors. Furthermore, the combination of digital printing and thermal transfer eliminates the need for plate making. After the image is designed on the computer, it can be directly printed onto the thermal transfer paper using a digital printer, saving the plate making process and costs, making the production process simpler and significantly improving efficiency.

[0029] In some embodiments of this utility model, after the heat transfer of the transfer film, the base film layer 100 and the release layer 200 need to be peeled off. If the carrier layer group 300 is not configured, the digital graphic layer 400 is directly formed on the lower end surface of the release layer 200. When the base film layer 100 and the release layer 200 are peeled off, the digital graphic layer 400 is easily damaged. Therefore, in this utility model, by configuring the carrier layer group 300, the digital graphic layer 400 can be better protected and the stability of the digital graphic layer 400 can be improved.

[0030] like Figure 1 As shown, in some embodiments of this utility model, the carrier layer group 300 includes a protective layer 310 and a digital base layer 320. The protective layer 310 is located between the release layer 200 and the digital base layer 320. The digital graphic layer 400 is applied to the lower end surface of the digital base layer 320 by digital printing or digital spraying. That is, the digital base layer 320 is used to support the digital graphic layer 4000, and the protective layer 310 is used to protect the digital base layer 320 and the digital graphic layer 400 from damage, thereby improving the stability and reliability of the digital graphic layer 400 in the transfer film.

[0031] Specifically, the main function of the digital base layer 320 is to improve the adhesion of electronic ink and optimize the surface adaptability of the substrate, so that the digital graphic layer 400 has a better printing effect. The protective layer 310 is located above the digital base layer 320 to protect the digital graphic layer 400.

[0032] In some embodiments of this utility model, the release layer 200 is located above the protective layer 310. When the base film layer 100 is peeled off from the release layer 200, the release layer 200 separates from the protective layer 310, which is less likely to damage the digital graphic layer 400, thus ensuring the normal application effect of the transfer film.

[0033] In practical applications, the transfer film is heated and hot-stamped onto the designated product. The hot melt adhesive layer 600 forms an adhesive force after heating, causing the transfer film to adhere to the designated product. Then, by peeling off the base film layer 100 and the release layer 200, the digital graphic layer 400 is transferred onto the designated product. At this time, the protective layer 310 of the transfer film is located on the top, which can protect the transfer film.

[0034] In some embodiments of this utility model, the protective layer 310 is a modified acrylic resin layer, which has good stability and protects the digital graphic layer 400.

[0035] Specifically, the modified acrylic resin layer is generally composed of basic monomers, modifying components, functional additives, etc. For example, it can be copolymerized from methyl methacrylate (MMA), butyl acrylate (BA) and glycidyl methacrylate (GMA), which has good temperature resistance (up to 230℃) and is not easy to crack, thus meeting the heat transfer requirements of the transfer film.

[0036] Of course, in the specific implementation process, the protective layer 310 can also be an organosilicon-modified acrylic resin layer, an epoxy resin layer, etc., all of which have good high-temperature stability and can better protect the digital graphic layer 400.

[0037] In some embodiments of this utility model, the protective layer 310 can be printed onto the lower end surface of the release layer 200 by printing methods such as gravure printing and flexographic printing.

[0038] In some embodiments of this utility model, the release layer 200 can be printed onto the lower end surface of the base film layer 100 by printing methods such as gravure printing and flexographic printing.

[0039] In some embodiments of this utility model, the digital base layer 320 is a water-soluble polymer layer, which has high ink adhesion and improves the stability of the digital graphic layer 400.

[0040] Specifically, the water-soluble polymer layer can be a water-based polyurethane acrylate layer, a water-based acrylate-polyurethane composite resin layer, etc., which has good adhesion to the inks used in digital spraying or printing, thus giving the digital graphic layer 400 high stability.

[0041] Of course, in the specific implementation process, the digital base layer 320 can also be a silane coupling agent modified layer or an isocyanate base layer, which can have good adhesion to digital ink.

[0042] In some embodiments of this invention, the digital base coating 320 can be formed by in-line coating with digital printing equipment or by offline coating.

[0043] In some embodiments of this utility model, the connecting layer 500 is a polyamide layer, which can improve the adhesion between the hot melt adhesive layer 600 and the digital graphic layer 400.

[0044] Specifically, the polyamide layer is formed by coating the base film layer 100, which has already been digitally printed, using methods such as gravure printing, flexographic printing, and screen printing. This can improve the adhesion of the hot melt adhesive, and also has certain heat resistance and flexibility, thereby improving the structural stability of the transfer film.

[0045] It is understood that, in some embodiments of this utility model, the connecting layer 50 may also be a polyester-type thermoplastic polyurethane layer, a polyether-type thermoplastic polyurethane layer, etc.

[0046] In some embodiments of this utility model, the superposition thickness of the connecting layer 500 and the hot melt adhesive layer 600 is 2μm-4μm, that is, the printing or coating thickness of the connecting layer 500 and the hot melt adhesive layer 600 is 2μm-4μm. This avoids the effect of excessive thickness on the heat conduction efficiency of the transfer film (excessive thickness requires a higher heat transfer temperature), ensures the interface bonding strength, and has good economic benefits.

[0047] like Figure 1 As shown, in some embodiments of this utility model, the transfer film further includes an anti-stick layer 700, which is disposed above the base film layer 100 and can reduce the adhesion phenomenon during the winding, stacking and transfer of the transfer film.

[0048] In some embodiments of this utility model, the anti-adhesive layer 700 is a polyethylene wax layer, which can be applied to the upper surface of the base film layer 100 using printing methods such as gravure printing or flexographic printing, so that the upper surface of the base film layer 100 is not easily adhered to other objects.

[0049] It is understood that, in some embodiments of this utility model, the anti-stick layer 700 may also be a fluorocarbon compound coating or an organosiloxane coating.

[0050] In some embodiments of this utility model, the base film layer 100 is a PET film layer, which has good mechanical support, dimensional stability and thermal properties, and meets the application requirements of transfer film.

[0051] It is understood that, in some embodiments of this utility model, the base film layer 100 may also be a polyimide (PI) film layer or a biaxially oriented polyethylene naphthalate (PEN) film layer.

[0052] In some embodiments of this utility model, the thickness of the base film layer 100 is 12μm-50μm, which has good structural stability and can meet the requirements of thermal transfer of the transfer film.

[0053] To better understand the above technical solution, the following will provide a detailed explanation of the technical solution in conjunction with specific implementation methods.

[0054] Example 1

[0055] The transfer film is prepared through the following steps:

[0056] S1. Prepare a PET film with a thickness of 25μm to obtain a base film layer 100. Print / coat a water-wax coating on the lower end face of the base film layer 100 to form a release layer 200.

[0057] S2. A modified acrylic resin coating is printed / coated on the lower end face of the release layer 200 to form a protective layer 310;

[0058] S3. Print / coat a polyethylene wax coating on the upper surface of the base film layer 100 to form an anti-stick layer 700;

[0059] S4. A water-soluble polymer coating is printed / coated on the lower end face of the protective layer 310 to form a digital base coating 320;

[0060] S5. Digital graphics are sprayed or printed on the lower surface of the digital base layer 320 to form a digital graphic layer 400.

[0061] S6. Print / coat a polyamide coating on the lower end face of the digital graphic layer 400 to form a connecting layer 500;

[0062] S7. Print / apply hot melt adhesive to the lower end face of the connecting layer 500 to form a hot melt adhesive layer 600. The total thickness of the connecting layer 500 and the hot melt adhesive layer 600 is 2μm.

[0063] This process yields a transfer film with digitally printed patterns, consisting of, from top to bottom, an anti-stick layer 700, a base film layer 100, a release layer 200, a protective layer 310, a digital base coating layer 320, a digital graphic layer 400, a connecting layer 500, and a hot melt adhesive layer 600.

[0064] When using the heat transfer film, the heat transfer temperature is 180±5℃ and the heating time is 18±1 seconds. The base film layer can be easily peeled off. The heat transfer pattern is stable, the digital graphics are stable and without deformation, and there is no peeling of the digital graphics. Scratching the heat transfer pattern will not damage it.

[0065] Example 2

[0066] The transfer film is prepared through the following steps:

[0067] S1. Prepare a PET film with a thickness of 35μm to obtain a base film layer 100. Print / coat a water-wax coating on the lower end face of the base film layer 100 to form a release layer 200.

[0068] S2. Print / apply an epoxy resin coating to the lower end face of the release layer 200 to form a protective layer 310;

[0069] S3. Print / coat an organosiloxane coating on the upper surface of the base film layer 100 to form an anti-stick layer 700;

[0070] S4. A water-soluble polymer coating is printed / coated on the lower end face of the protective layer 310 to form a digital base coating 320;

[0071] S5. Digital graphics are sprayed or printed on the lower surface of the digital base layer 320 to form a digital graphic layer 400.

[0072] S6. Print / coat a polyamide coating on the lower end face of the digital graphic layer 400 to form a connecting layer 500;

[0073] S7. Print / apply hot melt adhesive to the lower end face of the connecting layer 500 to form a hot melt adhesive layer 600. The total thickness of the connecting layer 500 and the hot melt adhesive layer 600 is 3μm.

[0074] This process yields a transfer film with digitally printed patterns, consisting of, from top to bottom, an anti-stick layer 700, a base film layer 100, a release layer 200, a protective layer 310, a digital base coating layer 320, a digital graphic layer 400, a connecting layer 500, and a hot melt adhesive layer 600.

[0075] When using the heat transfer film, the heat transfer temperature is 190±5℃ and the heating time is 19±1 seconds. The base film layer can be easily peeled off. The heat transfer pattern is stable, the digital graphics are stable and without deformation, and there is no peeling of the digital graphics. Scratching the heat transfer pattern will not damage it.

[0076] Example 3

[0077] The transfer film is prepared through the following steps:

[0078] S1. Prepare a PET film with a thickness of 20μm to obtain a base film layer 100. Print / coat a water wax coating on the lower end face of the base film layer 100 to form a release layer 200.

[0079] S2. A modified acrylic resin coating is printed / coated on the lower end face of the release layer 200 to form a protective layer 310;

[0080] S3. A water-soluble polymer coating is printed / coated on the lower end face of the protective layer 310 to form a digital base coating 320;

[0081] S4. Digital graphics are sprayed or printed on the lower end surface of the digital base layer 320 to form a digital graphic layer 400.

[0082] S5. Print / apply hot melt adhesive to the lower end face of the digital graphic layer 400 to form a hot melt adhesive layer 600 with a thickness of 2μm.

[0083] This produces a transfer film with digitally printed patterns, consisting of a base film layer 100, a release layer 200, a protective layer 310, a digital base layer 320, a digital graphic layer 400, and a hot melt adhesive layer 600, from top to bottom. This film lacks the anti-stick layer 700 and the connecting layer 500 compared to Examples 1 and 2.

[0084] When the transfer film is rolled up and stored, if the storage temperature is higher than 30℃, the hot melt adhesive layer 600 and the base film layer 100 are very likely to stick together. Occasionally, the hot melt adhesive layer 600 may adhere to the upper surface of the base film layer 100, rendering the transfer film unusable.

[0085] When using heat transfer printing, the heat transfer temperature is 180±5℃ and the heating time is 15±1 seconds. The base film layer 100 can be peeled off, but occasionally the digital graphics separate from the hot melt adhesive layer 600, and the digital graphics layer 400 is partially peeled off or damaged.

[0086] Of course, this invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A transfer film with a digitally printed pattern, characterized in that, include: Base film layer (100); A release layer (200) is disposed below the base film layer (100); A support layer assembly (300) is disposed below the release layer (200); A digital graphic layer (400) is disposed below the carrier layer group (300); a connecting layer (500) is disposed below the digital graphic layer (400); A hot melt adhesive layer (600) is disposed below the connecting layer (500); The digital graphic layer (400) is applied to the lower end face of the carrier layer group (300) by digital printing or digital spraying, and the connecting layer (500) connects the hot melt adhesive layer (600) and the digital graphic layer (400).

2. The transfer film with digitally printed patterns according to claim 1, characterized in that, The carrier layer group (300) includes a protective layer (310) and a digital base layer (320). The protective layer (310) is located between the release layer (200) and the digital base layer (320). The digital graphic layer (400) is applied to the lower end surface of the digital base layer (320) by digital printing or digital spraying.

3. The transfer film with digitally printed patterns according to claim 2, characterized in that, The protective layer (310) is a modified acrylic resin layer.

4. The transfer film with digitally printed patterns according to claim 2, characterized in that, The digital base coating (320) is a water-soluble polymer layer.

5. The transfer film with digitally printed patterns according to claim 1, characterized in that, The connecting layer (500) is a polyamide layer.

6. The transfer film with digitally printed patterns according to claim 1 or 5, characterized in that, The combined thickness of the connecting layer (500) and the hot melt adhesive layer (600) is 2μm-4μm.

7. The transfer film with digitally printed patterns according to claim 1, characterized in that, The transfer film also includes an anti-stick layer (700), which is disposed above the base film layer (100).

8. The transfer film with digitally printed patterns according to claim 7, characterized in that, The anti-stick layer (700) is a polyethylene wax layer.

9. The transfer film with digitally printed patterns according to claim 1, characterized in that, The base film layer (100) is a PET film layer.

10. The transfer film with digitally printed patterns according to claim 1 or 8, characterized in that, The thickness of the base film layer (100) is 12μm-50μm.

Images