UV crystal number digital printing film
By introducing a modified acrylic pressure-sensitive adhesive layer and a glass fiber mesh with a three-dimensional network cross-linked structure into the UV crystal label digital printing film, the problem of unstable adhesion of UV crystal labels was solved, and the stable bonding of high-transparency PVC film and the long-term firmness of the finished product were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGYI (FUJIAN) HEAT TRANSFER SCI & TECH CO LTD
- Filing Date
- 2025-08-27
- Publication Date
- 2026-06-23
Smart Images
Figure CN224392111U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of printing film technology, specifically relating to a UV crystal label digital printing film. Background Technology
[0002] Currently, with the explosive growth in demand for brand personalization, ordinary screen printing products, with their cumbersome steps and long waiting times, can no longer meet people's needs. UV crystal labels, with their high gloss, immediate use, and environmentally friendly characteristics, have become the preferred choice for signage in the packaging, gift, and electronics industries. Their characteristics include: the ability to peel off the film while retaining the image, leaving no residue; bright and vibrant images with rich colors, strong three-dimensionality, and high gloss; perfectly solving the problem of irregular shapes in inkjet printing, breaking through the limitation that images can only be printed on flatbed surfaces; saving labor costs, as one person can complete the printing process compared to screen printing and transfer printing, thus reducing labor costs for businesses; and reduced pollution, as UV inks significantly reduce pollution compared to the unpleasant odor of weak solvents and screen printing. However, existing UV crystal label products generally suffer from unstable adhesion: in traditional printing film processes, the bonding strength between the film adhesive layer and the high-transparency PVC film interface is insufficient, leading to residues or incomplete image peeling during transfer; simultaneously, the adhesive strength decreases significantly under high temperature and humidity environments, affecting the long-term durability of the finished product. Utility Model Content
[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a UV crystal label digital printing film with good interfacial bonding with high-transparency PVC film, which can be peeled off after application without leaving any residue.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a UV crystal label digital printing film, characterized in that: it includes a high-transparency PVC film, a modified acrylic pressure-sensitive adhesive layer and a release film, wherein the high-transparency PVC film, the modified acrylic pressure-sensitive adhesive layer and the release film are arranged sequentially from top to bottom, and the modified acrylic pressure-sensitive adhesive layer has a three-dimensional network cross-linked structure.
[0005] The modified acrylic pressure-sensitive adhesive layer contains a fiberglass mesh.
[0006] The thickness of the modified acrylic pressure-sensitive adhesive layer is 25-35 μm.
[0007] The release film is a transparent PET film with a thickness of 75 μm.
[0008] A patterned layer is provided between the modified acrylic pressure-sensitive adhesive layer and the high-permeability PVC film.
[0009] The high-permeability PVC film has a polyurethane primer layer on the side facing the pattern layer.
[0010] Compared with the prior art, the present invention has the following beneficial effects:
[0011] This utility model discloses a UV crystal label digital printing film. The modified acrylic pressure-sensitive adhesive layer forms a three-dimensional network cross-linked structure, which increases the cohesive strength and tack of the adhesive. It has good interfacial bonding with the high-transparency PVC film, and after application, it can be peeled off without leaving any adhesive residue. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of the printing film of this utility model;
[0013] Figure 2 This is a schematic diagram of the structure of the modified acrylic pressure-sensitive adhesive layer of this utility model.
[0014] The markings in the diagram are: 1. High-transparency PVC film; 2. Modified acrylic pressure-sensitive adhesive layer; 3. Fiberglass mesh; 4. Pattern layer; 5. Polyurethane primer layer. Detailed Implementation
[0015] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.
[0016] like Figure 1 and Figure 2 As shown, this embodiment provides a UV crystal label digital printing film, characterized by comprising a high-transparency PVC film 1, a modified acrylic pressure-sensitive adhesive layer 2, and a release film, arranged sequentially from top to bottom. The modified acrylic pressure-sensitive adhesive layer 2 has a three-dimensional network cross-linked structure. Specifically, the modified acrylic pressure-sensitive adhesive layer 2 forms a three-dimensional network cross-linked structure through a reaction between a hardener and the active groups on the modified acrylic molecular chain. Preferably, the hardener is isocyanate, and the modified acrylic pressure-sensitive adhesive is acrylic acid with a glass transition temperature (Tg) < 30℃, which has the advantages of high initial tack and good creep resistance, and is stable over time. Furthermore, the addition and curing of the hardener cross-links it into a three-dimensional network cross-linked structure, increasing the cohesive strength and tack of the adhesive, resulting in good interfacial bonding with the high-transparency PVC film 1. After application, the high-transparency PVC film 1 is peeled off without leaving any residue.
[0017] Furthermore, a fiberglass mesh 3 is provided within the modified acrylic pressure-sensitive adhesive layer 2. The fiberglass mesh 3 serves as an embedded skeleton structure within the modified acrylic pressure-sensitive adhesive layer 2, suppressing environmental deformation of the modified acrylic pressure-sensitive adhesive layer 2 and uniformly distributing transfer stress. In the manufacturing process, a first layer of modified acrylic pressure-sensitive adhesive layer 2 is first applied, then the fiberglass mesh 3 is attached to the modified acrylic pressure-sensitive adhesive layer 2, and finally a second layer of modified acrylic pressure-sensitive adhesive layer 2 is covered on the fiberglass mesh 3.
[0018] Furthermore, the thickness of the modified acrylic pressure-sensitive adhesive layer 2 is 25-35 μm. Preferably, the thickness of the modified acrylic pressure-sensitive adhesive layer 2 is 30 μm.
[0019] Furthermore, the release film is a transparent PET film with a thickness of 75μm.
[0020] Furthermore, a patterned layer 4 is provided between the modified acrylic pressure-sensitive adhesive layer 2 and the high-permeability PVC film 1. Specifically, a polyurethane primer layer 5 is provided on the side of the high-permeability PVC film 1 facing the patterned layer 4. By providing the polyurethane primer layer 5 as a transition layer that forms a chemical bond or physical bond between the high-permeability PVC film 1 and the modified acrylic pressure-sensitive adhesive layer 2, the bonding strength between the two is enhanced.
[0021] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.
Claims
1. A UV crystal label digital printing film, characterized in that: It includes a high-permeability PVC membrane, a modified acrylic pressure-sensitive adhesive layer, and a release film, which are arranged sequentially from top to bottom. The modified acrylic pressure-sensitive adhesive layer has a three-dimensional network cross-linked structure.
2. The UV crystal label digital printing film according to claim 1, characterized in that: The modified acrylic pressure-sensitive adhesive layer contains a glass fiber mesh.
3. The UV crystal label digital printing film according to claim 1, characterized in that: The thickness of the modified acrylic pressure-sensitive adhesive layer is 25-35 μm.
4. The UV crystal label digital printing film according to claim 1, characterized in that: The release film is a transparent PET film with a thickness of 75 μm.
5. The UV crystal label digital printing film according to claim 1, characterized in that: A patterned layer is provided between the modified acrylic pressure-sensitive adhesive layer and the high-permeability PVC film.
6. The UV crystal label digital printing film according to claim 5, characterized in that: The high-permeability PVC film has a polyurethane primer layer on the side facing the pattern layer.