A wear-resistant laser transfer paper with high transparency and pearl cross-line effect

Abstract

The utility model discloses a kind of laser transfer paper with wear-resistant high-transparency and pearlescent cross grain effect, it includes from top to bottom sequentially laminated and arranged easy-to-peel film layer, wear-resistant light-transmitting layer, figure function coating, aluminized reflection layer, adhesive layer and base paper layer, the easy-to-peel film layer includes PET film layer at upper surface and easy-to-peel adhesive layer below the PET film layer, the upper surface of the figure function coating is embossed and formed with pearlescent texture area and cross grain texture area.The utility model has the advantages that the laser transfer paper has easy-to-peel film layer, and the wear-resistant light-transmitting layer and figure function coating are not damaged when peeling the PET film layer of surface layer, the quality of laser transfer paper is good, and the defective rate is low;Pearlescent texture area and cross grain texture area are embossed on the figure function coating of the laser transfer paper, the former presents pearlescent effect when light, and the latter presents cross grain light column effect, successfully realizes dynamic color change with laser and pearlescent, and decoration and anti-fake effect are better.

Description

Technical Field

[0001] This utility model belongs to the field of special paper technology for packaging, specifically relating to a wear-resistant, highly transparent laser transfer paper with a pearlescent horizontal stripe effect. Background Technology

[0002] Laser transfer paper, also known as laser holographic transfer paper, is commonly used as packaging material for cigarettes and alcohol. It is dazzling when illuminated or displays specific patterns, providing a degree of anti-counterfeiting. The manufacturing process of laser transfer paper is typically as follows: A layer of resin is coated onto a PET film (forming a coating). Using a specialized molding machine, a specially designed laser holographic pattern is copied onto the resin (forming a laser transfer coating). After aluminum plating, adhesive is applied to the aluminum layer to bond the film and paper together. Finally, the PET film is peeled off, resulting in the final product.

[0003] Conventional laser transfer paper typically consists of a base paper layer, an adhesive layer, an aluminized layer, and a laser transfer coating layer, stacked sequentially from bottom to top. During the manufacturing process, the laser transfer coating is first formed and attached to a PET film. After the aluminized layer is bonded to the base paper layer via the adhesive layer, the PET film needs to be peeled off. However, due to the adhesive strength between the PET film and the laser transfer coating, a small amount of laser transfer coating often comes off with the peeled PET film, resulting in defects in the finished laser transfer paper. Furthermore, the exposed laser transfer coating is easily damaged by friction and other external forces after the PET film is peeled off. Additionally, existing laser transfer papers generally only produce horizontal stripes or other relatively simple effects when illuminated, making it difficult to achieve dynamic color changes that combine laser and pearlescent effects. Utility Model Content

[0004] This invention provides a wear-resistant, highly transparent laser transfer paper with a pearlescent horizontal stripe effect, aiming to overcome, to some extent, the aforementioned shortcomings of the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A wear-resistant, high-transparency laser transfer paper with pearlescent horizontal stripe effect, which includes an easy-peel film layer, a wear-resistant and light-transmitting layer, a patterned functional coating layer, an aluminum-plated reflective layer, an adhesive layer and a base paper layer stacked from top to bottom. The easy-peel film layer includes a PET film layer on the upper surface and an easy-peel adhesive layer below the PET film layer. The upper surface of the patterned functional coating layer is embossed with a pearlescent texture area and a horizontal stripe texture area.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the easy-peel film layer also includes an anti-detachment adhesive layer located between the PET film layer and the easy-peel adhesive layer.

[0008] Furthermore, there are multiple pearlescent texture areas and horizontal stripe texture areas, and two adjacent pearlescent texture areas are separated by one of the horizontal stripe texture areas.

[0009] Furthermore, there are multiple horizontal texture areas that are arranged parallel to each other and spaced apart, and there is one pearlescent texture area that surrounds all of the horizontal texture areas.

[0010] Furthermore, both the pearlescent texture area and the horizontal texture area are laser holographic patterns formed by embossing.

[0011] Furthermore, the thickness of the patterned functional coating is 3-8 μm, and the depth of the pearlescent texture area and the horizontal texture area formed by embossing is 0.85-1.25 μm.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The laser transfer paper provided by this utility model has an easy-peel film layer, which can be easily peeled off before leaving the factory or during use. Peeling off this layer does not remove the pattern functional coating, resulting in high-quality laser transfer paper with a low defect rate. An abrasion-resistant and translucent layer is also provided between the pattern functional coating and the easy-peel film layer. This separates the easy-peel film layer from the pattern functional coating, further preventing the impact of peeling off the easy-peel film layer on the pattern functional coating. It also increases the abrasion resistance of the laser transfer paper, ensuring greater durability. The easy-peel film layer includes an easy-peel adhesive layer and an anti-detachment adhesive layer. The anti-detachment adhesive layer firmly bonds the PET film layer to the easy-peel adhesive layer, which in turn bonds to the abrasion-resistant and translucent layer. When peeling off the easy-peel film layer, the significantly stronger adhesion of the anti-detachment adhesive layer ensures that all the easy-peel adhesive layers are completely peeled off from the abrasion-resistant and translucent layer without damaging the pattern functional coating or the abrasion-resistant and translucent layer.

[0014] The laser transfer paper features a patterned coating with pearlescent and horizontal stripe textures. The former exhibits a pearlescent effect when illuminated, while the latter displays a horizontal stripe light column effect, successfully achieving dynamic color changes that combine laser and pearlescent elements, resulting in superior decorative and anti-counterfeiting effects. Attached Figure Description

[0015] Figure 1 A cross-sectional view of a wear-resistant, highly transparent laser transfer paper with a pearlescent horizontal stripe effect provided for this utility model (the easy-peel film layer is shown as a whole).

[0016] Figure 2 for Figure 1 The cross-sectional view of the peelable film layer of the laser transfer paper shown;

[0017] Figure 3 for Figure 1The diagram shows a top view of the pearlescent texture area and the horizontal texture area embossed on the surface of the patterned functional coating of the laser transfer paper, wherein the two horizontal texture areas are separated from the middle by the pearlescent texture area.

[0018] Figure 4 This is a top view of the pearlescent texture area and the horizontal texture area embossed on the surface of the pattern functional coating of laser transfer paper, wherein each horizontal texture area is surrounded by the pearlescent texture area.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Easy-peel film layer; 2. Wear-resistant and light-transmitting layer; 3. Patterned functional coating; 4. Aluminized reflective layer; 5. Adhesive layer; 6. Base paper layer; 101. PET film layer; 102. Easy-peel adhesive layer; 103. Anti-detachment adhesive layer; 301. Pearl texture area; 302. Horizontal texture area. Detailed Implementation

[0021] The technical solution provided by this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In the description of this utility model, if terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", and "outer" are used to indicate the orientation or positional relationship, the orientation or positional relationship indicated is based on the orientation 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.

[0023] like Figures 1 to 4 As shown, this utility model provides a wear-resistant, highly transparent laser transfer paper with a pearlescent horizontal stripe effect, which includes an easy-peel film layer 1, a wear-resistant and light-transmitting layer 2, a patterned functional coating layer 3, an aluminum-plated reflective layer 4, an adhesive layer 5, and a base paper layer 6 stacked sequentially from top to bottom. The easy-peel film layer 1 includes a PET film layer 101 on the upper surface and an easy-peel adhesive layer 102 below the PET film layer 101. The upper surface of the patterned functional coating layer 3 is embossed with a pearlescent texture area 301 and a horizontal stripe texture area 302.

[0024] Understandably, depending on the needs, the easy-peel film layer can be peeled off either before the laser transfer paper leaves the factory or not at the factory but peeled off before use.

[0025] It should be noted that the patterned functional coating is a paint made by mixing acrylic resin and carboxymethyl cellulose in a mass ratio of 8.15:0.95. The coating thickness is controlled at 3-8 μm, the molding temperature is 172-182℃, and the pressure roller pressure is 0.40-0.45 MPa. The master plate used for printing is made by photolithography, on which corresponding pearlescent texture areas and horizontal texture areas are photolithographically etched at corresponding positions. Among them, the pearlescent texture areas are randomly scattered small dots at different angles (about 0.01 mm in diameter), while the horizontal texture areas are strip-shaped micro-grooves or multi-faceted protrusions.

[0026] It should be noted that the main component of the wear-resistant and translucent layer in this invention is polyurethane, which is formed by coating and curing a polyurethane coating. The polyurethane coating is composed of 65 parts (by weight, the same below) of polyolefin polyol (hydroxyl-terminated polybutadiene), 45-50 parts of non-aromatic isocyanate (dicyclohexylmethane diisocyanate), 5-10 parts of curing agent (propylene glycol), 1-2 parts of ultraviolet absorber, 0.2-0.5 parts of leveling agent, and 300-400 parts of solvent (toluene or cyclohexanone). This polyurethane coating can be sprayed onto the surface of a patterned functional coating. The wear-resistant and translucent layer formed after curing not only has strong adhesion, wear resistance, and weather resistance, but also has excellent light transmittance, exceeding 99%.

[0027] In this invention, the bonding layer that serves to bond the aluminized reflective layer and the composite paper layer is formed by curing carboxylated styrene-butadiene latex, with a thickness of about 3.2 μm. After the aluminized reflective layer is formed, carboxylated styrene-butadiene latex is coated on it and then laminated with the base paper layer. The ambient temperature is controlled at 85-95℃ during the lamination process.

[0028] In one embodiment of this utility model, such as Figure 2 As shown, the easy-peel film layer 1 also includes an anti-detachment adhesive layer 103 located between the PET film layer 101 and the easy-peel adhesive layer 102.

[0029] It should be noted that the anti-detachment adhesive layer is formed by rapidly curing a strong adhesive coating containing polyurethane applied to the surface of the PET film. This strong adhesive coating is composed of polyurethane, polymethyl methacrylate, and ethyl acetate (solvent) in a weight ratio of 18-20:8-10:25-35. The easy-peel adhesive layer is formed by applying a methyl methacrylate adhesive coating containing graphene and nano-silica onto the cured anti-detachment adhesive layer. This adhesive coating is composed of 18-20 parts methyl methacrylate, 2-3 parts free radical initiator, 40-45 parts acetone (solvent), 10-12 parts methyl silicone oil, 3-5 parts nano-silica, and 0.1-0.2 parts graphene. All "parts" refer to parts by weight.

[0030] In one embodiment of this utility model, such as Figure 3As shown, there are multiple pearlescent texture areas 301 and horizontal texture areas 302, and two adjacent pearlescent texture areas 301 are separated by one horizontal texture area 302.

[0031] It should be noted that in this embodiment, the pearlescent texture area and the horizontal stripe texture area are arranged alternately, and different pearlescent texture areas are separated by the horizontal stripe texture area, and similarly, different horizontal stripe texture areas are also separated by the pearlescent texture area.

[0032] In one embodiment of this utility model, such as Figure 4 As shown, there are multiple horizontal texture areas 302 that are arranged in parallel and spaced apart from each other, and there is one pearlescent texture area 301 that surrounds all of the horizontal texture areas 302.

[0033] It should be noted that in this embodiment, the pearlescent texture area is not separated by the horizontal texture areas, but rather forms a unified whole. The horizontal texture areas are located within the area enclosed by the pearlescent texture area, and adjacent horizontal texture areas are spaced parallel to each other. It is understood that, if necessary, the horizontal texture areas can also be arranged to intersect each other, for example, to form text or specific patterns.

[0034] In one embodiment of this utility model, the pearlescent texture area 301 and the horizontal texture area 302 are both laser holographic patterns formed by embossing.

[0035] It should be noted that the patterns on the pearlescent texture area and the horizontal texture area are first laser-engraved onto the master plate. After the master plate is made into a molding master plate, the surface of the film layer corresponding to the pattern functional coating is then hot-pressed in the molding equipment.

[0036] In one embodiment of this utility model, the thickness of the patterned functional coating 3 is 3-8 μm, and the depth of the pearlescent texture area 301 and the horizontal texture area 302 formed by embossing is 0.85-1.25 μm.

[0037] It should be noted that the above-mentioned patterned functional coating of a specific thickness and the pearlescent or horizontal textured area of ​​a specific depth can ensure a better display of the laser horizontal light column and the dynamic color effect of the pearlescent.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wear-resistant, highly transparent laser transfer paper with a pearlescent horizontal stripe effect, characterized in that, The material includes, from top to bottom, an easy-peel film layer (1), a wear-resistant and light-transmitting layer (2), a patterned functional coating layer (3), an aluminum-plated reflective layer (4), an adhesive layer (5), and a base paper layer (6). The easy-peel film layer (1) includes a PET film layer (101) on the upper surface and an easy-peel adhesive layer (102) below the PET film layer (101). The upper surface of the patterned functional coating layer (3) is embossed with a pearlescent texture area (301) and a horizontal texture area (302).

2. The laser transfer paper with wear resistance, high transparency, and pearlescent horizontal stripe effect according to claim 1, characterized in that, The easy-peel film layer (1) also includes an anti-detachment adhesive layer (103) located between the PET film layer (101) and the easy-peel adhesive layer (102).

3. The laser transfer paper with wear resistance, high transparency, and pearlescent horizontal stripe effect according to claim 2, characterized in that, There are multiple pearlescent texture areas (301) and horizontal texture areas (302), and two adjacent pearlescent texture areas (301) are separated by one horizontal texture area (302).

4. The laser transfer paper with wear resistance, high transparency, and pearlescent horizontal stripe effect according to claim 1, characterized in that, There are multiple horizontal texture areas (302) that are arranged parallel to each other and spaced apart, and there is one pearlescent texture area (301) that surrounds all of the horizontal texture areas (302).

5. The laser transfer paper with wear resistance, high transparency, and pearlescent horizontal stripe effect according to claim 1, characterized in that, The pearlescent texture area (301) and the horizontal texture area (302) are both laser holographic patterns formed by embossing.

6. A laser transfer paper with wear resistance, high transparency, and pearlescent horizontal stripe effect according to any one of claims 1 to 5, characterized in that, The thickness of the patterned functional coating (3) is 3-8 μm, and the depth of the pearlescent texture area (301) and the horizontal texture area (302) formed by embossing is 0.85-1.25 μm.

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