Holographic pattern effect architectural wall covering paper and method of making same

Abstract

The application discloses a holographic pattern effect building wall surface decoration paper and a preparation method thereof. The preparation method comprises the following steps: preparing a BOPP laser film with laser holographic patterns, printing decoration patterns on a decoration base paper, coating an SA20 surface-coated melamine glue layer on the decoration pattern surface of the decoration base paper, transferring the laser holographic patterns on the BOPP laser film to the SA20 surface-coated melamine glue layer, and coating a back-coated glue layer on the back surface of the decoration base paper to obtain the building wall surface decoration paper. The laser radiation effect is added to the building wall surface decoration paper, and the SA20 surface-coated melamine glue layer can be well combined with the laser holographic patterns on the BOPP laser film, so that the function of adding the laser radiation effect to the building wall surface decoration paper is realized.

Description

Technical Field

[0001] This invention relates to the field of architectural decorative materials, and in particular to a holographic pattern effect architectural wall decorative paper and its preparation method. Background Technology

[0002] As people's living standards continue to improve, their demands for the performance and aesthetics of decorative materials are also increasing. Artificial board veneer technology is developing steadily and continuously, gradually evolving from single-function to multi-functional and higher-quality development, showing promising prospects for growth and application. However, existing surface decorative materials offer limited finishes, mostly solid colors and natural marble textures. Even digital printing only provides visual patterns on a two-dimensional surface. In the decorative paper industry, pattern design has reached a bottleneck. In the future, further research is needed to enrich functional artificial board veneer technologies and effects, as well as to cater to the personalized and diversified needs of consumers.

[0003] Low-grammage titanium dioxide paper is commonly used for decorative paper. This material has a loose paper fiber structure and stable surface whiteness. The traditional processing method involves printing the paper, impregnating both sides with melamine resin, and then thermally bonding it to a substrate. After curing, the melamine resin strengthens the paper structure and helps it bond to the substrate, while also forming a scratch-resistant, abrasion-resistant, and waterproof protective layer on the paper surface. Adding a laser holographic effect layer to the paper can give the paper a glossy surface, increase the depth of the design, and create a better visual effect. However, the traditional impregnation process, which involves impregnating both sides of the paper with melamine resin, is not compatible with the adhesive used when transferring the melamine resin to the laser holographic effect paper. The two materials do not bond well, and the varnish used to create the laser holographic effect is prone to peeling off during the thermal bonding process with the substrate.

[0004] Currently, laser holographic effects can only be achieved through lamination, but lamination cannot achieve accurate registration and requires full-page lamination, which is costly. Furthermore, lamination wastes a layer of PET film, which may separate from the paper in humid environments, making it unsuitable for use on architectural wallpaper.

[0005] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the present invention provides a method for preparing holographic pattern effect architectural wall decorative paper to solve the problem of achieving laser holographic effect on architectural wall decorative paper.

[0007] The technical solution of the present invention is as follows: This invention provides a method for preparing holographic pattern effect architectural wall decorative paper, comprising: Fabrication of BOPP laser film with laser holographic images; Print decorative graphics on decorative base paper; A layer of SA20 melamine adhesive is applied to the decorative graphic surface of the decorative base paper. The laser holographic images on the BOPP laser film are transferred to the SA20 surface-coated melamine adhesive layer; A backing adhesive layer is applied to the back of the decorative base paper to make architectural wall decorative paper.

[0008] In the method for preparing the holographic pattern effect architectural wall decoration paper, the step of making the BOPP laser film with laser holographic effect includes: Making laser embossing plates; Unwind the BOPP base film and melt the surface of the BOPP base film; Laser holographic images are embossed onto a BOPP base film using a laser embossing plate. After the BOPP base film is cooled, it is peeled off to form a BOPP laser film.

[0009] In the method for preparing the holographic pattern effect architectural wall decoration paper, the step of unwinding the BOPP base film and melting the surface of the BOPP base film includes: Unwind the BOPP base film and heat its surface with a preheating roller at 120-130℃ to melt it.

[0010] In the method for preparing holographic pattern effect architectural wall decoration paper, the step of molding laser holographic images onto a BOPP base film using a laser molding plate includes: Use 30-50kg / cm 2 The pressure is applied at a speed of 25m / min-35m / min to transfer the laser holographic image on the laser molding plate onto the BOPP film; during the transfer, the workshop temperature is 25-30℃ and the humidity is 50%-70%.

[0011] In the method for preparing the holographic pattern effect architectural wall decoration paper, the step of printing decorative graphics on the decorative base paper includes: Decorative graphics and text are printed on the decorative base paper using a gravure printing machine at a printing speed of not less than 100m / min; Use hot air drying at a temperature of 40-70℃.

[0012] The method for preparing holographic pattern effect architectural wall decoration paper includes the step of transferring laser holographic images from the BOPP laser film to the SA20 melamine adhesive layer, comprising: Apply molding varnish over the melamine adhesive layer on the SA20 surface; The laser holographic image on the BOPP laser film is transferred onto the molding varnish and then cured.

[0013] In the preparation method of the holographic pattern effect architectural wall decoration paper, the molding varnish includes: 5-15 parts of acrylic resin, 45-70 parts of acrylic emulsion, 0.5-1.5 parts of leveling agent, 5-20 parts of neutralizing agent, 10-30 parts of water, and 5-15 parts of reinforcing material, wherein the reinforcing material is inorganic whisker powder with a particle size of 10nm-50nm.

[0014] In the method for preparing the holographic pattern effect architectural wall decorative paper, the step of coating the back of the decorative base paper with a backing adhesive layer to form the architectural wall decorative paper includes: A back coating adhesive layer is applied to the back of the decorative base paper at a coating speed of 100 m / min. The back coating adhesive layer is dried at a temperature of 120-150℃.

[0015] In the method for preparing the holographic pattern effect architectural wall decoration paper, the step of making the laser molding plate includes: Laser patterns are set on nickel plates using laser direct writing or photomask exposure processes; UV varnish is applied to the resin plate, and the laser image on the nickel plate is transferred to the resin plate. UV varnish is applied to the seamless die-pressing roller to transfer the laser graphics on the resin plate to the seamless die-pressing roller to form a laser die-pressing plate.

[0016] A type of architectural wall decoration paper includes, in sequence, a BOPP laser film, an SA20 melamine-coated adhesive layer, decorative graphics, decorative base paper, and a back-coated adhesive layer; wherein the BOPP laser film is prepared using the preparation method described above, and the laser holographic graphics on the BOPP laser film are transferred to the SA20 melamine-coated adhesive layer using the preparation method described above.

[0017] Beneficial effects: This invention creates a BOPP laser film with laser holographic graphics, prints decorative graphics on decorative base paper, coats the decorative graphic surface of the base paper with an SA20 melamine adhesive layer, transfers the laser holographic graphics from the BOPP laser film onto the SA20 melamine adhesive layer, and then coats the back of the base paper with a back-coating adhesive layer to create architectural wall decoration paper. This achieves the addition of a laser effect to the architectural wall decoration paper, and the SA20 melamine adhesive layer can be well integrated with the laser holographic graphics on the BOPP laser film, thus realizing the function of adding a laser effect to the architectural wall decoration paper. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 A flowchart illustrating the preparation method of holographic pattern effect architectural wall decoration paper provided in this embodiment of the invention; Figure 2 This is a flowchart of step S10 in the method for preparing holographic pattern effect architectural wall decoration paper provided in an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the BOPP laser film in the preparation method of holographic pattern effect architectural wall decoration paper provided in the embodiments of the present invention.

[0020] Figure 4 This is a schematic diagram of the laser holographic image transfer process in the preparation method of holographic pattern effect architectural wall decoration paper provided in the embodiments of the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of the architectural wall decoration paper prepared according to an embodiment of the present invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0023] The method for preparing holographic pattern effect architectural wall decorative paper provided by this invention can not only enrich the style of decorative paper, but also provide multiple display layers and beautiful appearance with the laser effect, especially under light, it has a different visual experience from traditional decorative paper. It breaks through the bottleneck of traditional decorative paper pattern design, and can also meet the original performance requirements of decorative paper such as impregnation and hot pressing.

[0024] The method for preparing holographic pattern effect architectural wall decorative paper of the present invention is mainly used to give wall decorative paper a laser holographic effect. For decorative paper with laser holographic effect, firstly, the paper must have a certain pattern printing effect, and then it must also have a laser holographic effect. At the same time, it must also meet the requirements of subsequent processes such as gluing and hot pressing. This kind of decorative paper with special surface effect not only has a visual effect different from the patterns of traditional decorative paper, but can also be used in the construction industry such as furniture decoration, floor decoration, and wall decoration.

[0025] The preparation method of holographic pattern effect architectural wall decorative paper firstly involves preparing a BOPP laser film with laser holographic effect, then performing surface printing and double-sided high-speed coating and impregnation on the decorative base paper, and finally transferring the laser holographic effect on the BOPP laser film onto the decorative paper using the varnish of this invention.

[0026] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0027] Please see Figure 1 The method for preparing holographic pattern effect architectural wall decoration paper provided in this embodiment of the invention includes: S10. Fabricate BOPP laser film with laser holographic images.

[0028] The BOPP (Biaxially Oriented Polypropylene) laser film has high tensile strength, impact strength, rigidity, and toughness, and the laser holographic images on it have multiple display layers and a strong three-dimensional effect.

[0029] Please refer to the following: Figure 2 In an optional embodiment, step S10 includes: S101. Make laser embossing plates.

[0030] In practice, when making the laser embossing plate, laser images can be set on a nickel plate using laser direct writing or photomask exposure processes. After development, a laser holographic pattern structure is formed. Then, UV varnish is applied to a resin plate, and the laser images on the nickel plate are transferred to the resin plate. Finally, UV varnish is applied to a seamless molding roller, and the laser images on the resin plate are transferred to the seamless molding roller to form a laser embossing plate. This makes the laser holographic images on the BOPP laser film continuous without any visible seams.

[0031] S102. Unwind the BOPP base film and melt the surface of the BOPP base film.

[0032] The BOPP base film is a three-layer co-extruded BOPP film with a molded functional layer of EVA material on its surface. The film thickness is uniform, typically 22-25 μm, and it exhibits good imaging transparency with a surface tension of approximately 32 mN / m. In an optional embodiment, the BOPP base film is unwound and its surface is heated using a preheating roller at 120-130°C to melt it to a thickness of 2 μm, facilitating subsequent molding. Alternatively, solid-state electronic thermostatic heating oil can be used for heating.

[0033] S103, laser holographic images are embossed onto BOPP base film using a laser embossing plate.

[0034] Optionally, during molding, a pressure of 30-50 kg / cm² can be used. 2 The pressure, at a speed of 25m / min-35m / min, transfers the laser holographic image from the laser molding plate onto the BOPP film, such as... Figure 3 As shown; during the transfer printing, the workshop temperature is 25-30℃ and the humidity is 50%-70%, which yields the desired result.

[0035] For example, a pressure of 45 kg / cm2 and a speed of 30 m / min can be used to transfer the laser holographic images on the laser molding plate onto the BOPP film; during the transfer, the workshop temperature is 25-30℃ and the humidity is 50%-70%, so that the laser holographic images on the laser molding plate can be transferred onto the BOPP base film.

[0036] Furthermore, step S103 also includes: using a laser molding plate to mold a first molded graphic layer on the BOPP base film in one step, then shifting the first molded graphic layer by 0.01-0.1mm, and using the laser molding plate to mold a second molded graphic layer in a second step, and repeating this operation several times to create a laser holographic graphic with a light pillar effect.

[0037] Furthermore, step S103 also includes: coating a pyridine guanidine antibacterial agent layer onto the BOPP laser film. The pyridine guanidine antibacterial agent can rapidly inhibit the synthesis of bacterial nucleic acid proteins, preventing harmful bacteria from multiplying, thereby achieving the purpose of antibacterial and bacteriostatic effects. It also has the characteristic of purifying air, and can use light energy to decompose harmful substances such as formaldehyde, toluene, and sulfur dioxide into inorganic substances and substances such as water and oxygen that are harmless to the human body. It can also decompose smoke, carbon dioxide, and TVOC, rapidly reduce PM2.5 concentration, achieve long-lasting air purification, increase indoor oxygen content, and make the ambient air fresh.

[0038] S104. After cooling, the BOPP base film is peeled off to form a BOPP laser film.

[0039] During cooling, it can be cooled naturally or by blowing cold air, and then rolled up for use after the BOPP laser film is peeled off.

[0040] S20. Print decorative graphics on decorative base paper.

[0041] During printing, gravure printing technology can be used to print patterns or designs on paper. This may include: using a gravure printing machine to print decorative graphics on decorative base paper at a printing speed of not less than 100 m / min, followed by drying with hot air at a temperature of 40-70℃.

[0042] Specifically, a gravure printing machine can be used for roll-to-roll production. The printing roller is a soft roller, the wall decoration base paper can be 70-120g titanium dioxide paper, and the printing ink is water-based ink with a viscosity greater than 30 (T4 cup), an ink fineness less than 20, a color retention of 4-5, and good melamine resistance. During printing, the doctor blade is angled with an angle between 55° and 60°, and the printed patterns include, but are not limited to, solid colors and natural textures.

[0043] Furthermore, after step S20, the method further includes: embossing the decorative graphic area to form raised or recessed graphics.

[0044] In this embodiment, embossing is performed on a portion or all of the area on the decorative base paper where decorative graphics are printed, using embossing rollers or molding devices, to create a raised or recessed texture that corresponds to the pattern on the surface of the decorative material. This creates a sense of depth that echoes the laser holographic graphics, thereby increasing the visual richness.

[0045] Furthermore, step S40 further includes: using foaming ink to print raised or recessed images on partial or all areas of the laser hologram and / or decorative images.

[0046] In practice, after printing embossed foaming ink on a partial or complete area, the ink is heated and cured to make the ink marks on the foaming ink raised and have a certain height. Then, inhibitor ink is applied to a partial area of ​​the foaming ink layer and heated to make the inhibitor ink area recessed.

[0047] This invention involves coating a portion or all of a laser holographic image and / or decorative image with a PVC coating containing a foaming agent, followed by low-temperature baking to form a PVC foam layer. Then, a portion or all of the PVC foam layer is coated with a PVC coating containing an inhibitor, causing some areas of the PVC foam layer to become concave. This creates a raised or recessed relief image that is in sync with the laser holographic image, thus achieving a good integration of the raised / recessed effect with the laser holographic image.

[0048] Specifically, PVC coatings using foaming agents are printed on partial or all areas of the decorative graphics. Afterward, they are baked in a low-temperature oven at 30-80℃ to form a PVC foam layer, which is then cooled. For areas requiring recessed areas, coatings containing inhibitors are applied and then placed in an oven at 120-150℃. After foaming, embossed graphics with a textured surface matching the design are created. These embossed graphics can create a harmonious effect with the laser effect, thus increasing visual richness.

[0049] Furthermore, printing decorative graphics on the base paper also involves using lightfast ink with a lightfastness rating of 5. This ensures that the graphics will not fade due to sunlight, even when used on balconies or outdoor walls or floors, thus increasing the lifespan of the decorative wall paper and reducing maintenance costs for users.

[0050] Furthermore, the decorative graphics or embossed graphics also include: applying a waterproof layer to the decorative graphics and / or embossed graphics, thereby increasing the waterproof and moisture-proof performance of the building wall decorative paper.

[0051] Furthermore, printing decorative graphics on decorative base paper also includes adding fluorescent powder, photochromic powder, etc., to the ink to achieve different effects under different lighting conditions or in different weather conditions. This invention, by adding special components such as fluorescent powder and photochromic powder to the ink of the decorative paper, enables it to exhibit different effects under different lighting conditions or in different weather conditions. For example, at night or under low light conditions, the decorative paper can display a bright fluorescent effect, or the photochromic powder allows the decorative paper to change with environmental changes.

[0052] S30. Apply an SA20 melamine adhesive layer to the decorative graphic surface of the decorative base paper.

[0053] The SA20 surface-coated melamine adhesive layer can adhere well to the laser holographic images on the BOPP laser film. During coating, a coating machine is used to apply the melamine adhesive at a speed of 100 m / min, followed by drying in an oven at a temperature of 120-150℃.

[0054] The preparation method of the holographic pattern effect architectural wall decoration paper of the present invention also includes the preparation of SA20 surface-coated melamine adhesive with good bonding strength, and it has properties such as high temperature resistance and fire resistance. The SA20 surface-coated melamine adhesive comprises 80% water-based melamine-formaldehyde resin, 3% softener (polybutyl acrylate), 2% stress dispersant (organosilicon microspheres), 0.5% wetting agent (glycerin), 8% water, 2% phenolic resin, and 4.5% polyphosphate melamine auxiliary additive, which are prepared by mixing and stirring.

[0055] During the preparation process, the stress dispersant releases internal stress in the board, reducing the impact on the surface melamine decorative paper. The wetting agent reduces the surface energy of the stress dispersant, making it easier to be wetted by water, thus assisting in dispersion and preventing sedimentation. The phenolic resin maintains structural integrity and dimensional stability even at extreme temperatures. Using these components enhances the crack resistance, high-temperature resistance, and fire resistance of the melamine adhesive, while other properties such as surface bonding strength, scratch resistance, and abrasion resistance remain unaffected. Furthermore, it eliminates the need to modify existing multilayer board impregnation and hot-press lamination processes. Water-based melamine-formaldehyde resin has a high nitrogen content, high flame retardant efficiency, and good thermal stability.

[0056] The results of the adhesion tests on SA20 surface-coated melamine adhesive and conventional melamine adhesive using M tape, green tape, and a cross-cut adhesion tester used in the laboratory are shown in Table 1. The strength of the M tape, green tape, and cross-cut adhesion tester increases in that order.

[0057] Surface coating with melamine adhesive 3M tape Green tape 100-grid cutter + 3M tape Heat-resistant pressing temperature Conventional melamine adhesive × × × 180℃ SA20 melamine adhesive for surface coating √ √ √ 200℃ S40: Transfer the laser holographic image on the BOPP laser film to the SA20 melamine adhesive layer.

[0058] Please refer to the following: Figure 4 Step S40 includes: S401, applying molding varnish to the melamine adhesive layer on the SA20 surface; S402, transferring the laser holographic image on the BOPP laser film onto the molding varnish and curing it.

[0059] Optionally, the preparation method of the holographic pattern effect architectural wall decoration paper of the present invention further includes preparing a molding varnish for BOPP laser film, which is firmly bonded to the SA20 surface-coated melamine adhesive layer and has properties such as high temperature resistance, scratch resistance, and water resistance.

[0060] The molding varnish is a laser transfer varnish comprising: 5-15 parts acrylic resin, 45-70 parts acrylic emulsion, 0.5-1.5 parts leveling agent, 5-20 parts neutralizing agent, 10-30 parts water, and 5-15 parts reinforcing material. The reinforcing material is inorganic whisker powder with a particle size of 10nm-50nm, which enhances mechanical properties. After the varnish dries, the randomly arranged whisker fibers act as a skeleton in the varnish layer, significantly improving the abrasion resistance and tensile strength of the water-based varnish, thereby meeting the abrasion resistance requirements of high-end products.

[0061] Preferably, after applying the laser transfer varnish to the SA20 surface using a melamine adhesive layer at a speed of 60-80 m / min, the varnish coating thickness is 4-6 cm. 3 / m 2 Then, BOPP laser film is used to transfer the laser holographic pattern onto the laser transfer varnish, and the transfer is carried out while curing. The molding pressure is 30-50 kg / cm2, the curing power is 70%-90%, and the curing method is UV curing.

[0062] This invention uses BOPP laser film to transfer laser holographic patterns, which can achieve local laser effects, and has high registration accuracy. Compared with the lamination method, it is less expensive and will not separate from the paper, thus having good reliability.

[0063] When transferring laser holographic images, the material is first unwound using an unwinding device. A tension sensor ensures that the tension remains within a preset range throughout the process. Then, a heat-pressing assembly consisting of a UV curing unit, a finished product peeling mechanism, and a roller cleaning scraper mechanism is used. During the transfer process, a molding varnish is applied to the printed decorative paper, which has been coated with an SA20 melamine adhesive layer. The varnish application speed is 60-80 m / min, and the varnish application amount is 10 g / m. 2 Then, using a pressure roller with a hardness of HS85 or higher, the laser holographic image on the BOPP laser film is transferred onto the paper, with a molding pressure of 30-50 kg / cm². 2Furthermore, when the BOPP laser film enters the pressure roller, the angle between it and the printed material should be maintained at 45°-50°. Then, it is cured using three 5.6-6.5KW UV lamps at 70%-90% power.

[0064] The following tests were conducted by heating the hot stamping panel to 180°C and then hot-pressing water-based varnish, UV varnish, and laser transfer varnish with SA20 melamine adhesive. The test results are shown in Table 2. SA20 melamine adhesive for surface coating 10 seconds at 180°C Continuous exposure to 140℃ for 30 minutes Remark Water-based varnish × × It will melt at 180℃, and the holographic laser effect will disappear. UV varnish √ × At 180℃, the laser holographic effect will be weakened, and the adhesion between the varnish and the substrate will also be reduced. Laser transfer varnish √ √ The laser holographic effect remains unchanged at a temperature of 180℃, and the adhesion between the varnish and the substrate remains unchanged. S50. Apply a back coating adhesive layer to the back of the decorative base paper to make architectural wall decorative paper.

[0065] When applying the back coating adhesive layer, a coating speed of 100 m / min can be used to apply the back coating adhesive layer to the back of the decorative base paper; then, the back coating adhesive layer is dried at a temperature of 120-150℃. The present invention adopts a high-speed coating method, which has higher production efficiency compared with the existing double-sided impregnation method.

[0066] The back coating adhesive layer includes melamine, urea, methanol, formaldehyde, polyvinyl alcohol, and sodium hydroxide. In addition, the back coating melamine adhesive also contains some curing agents, penetrants, dust inhibitors, defoamers, and antistatic agents.

[0067] In summary, this invention achieves the addition of a laser holographic effect to architectural wall decorative paper. Furthermore, the coating method results in higher production efficiency, and the SA20 melamine adhesive layer effectively integrates with the laser holographic graphics on the BOPP laser film, thus realizing the function of adding a laser holographic effect to the architectural wall decorative paper. Simultaneously, the architectural wall decorative paper of this invention also possesses properties such as strong adhesion, high temperature resistance, scratch resistance, water resistance, and flame retardancy.

[0068] Based on the above-described method for preparing holographic pattern effect architectural wall decorative paper, this invention also provides an architectural wall decorative paper, characterized in that it comprises, from top to bottom, a BOPP laser film 10, an SA20 melamine-coated adhesive layer 20, decorative graphics 30, decorative base paper 40, and a back-coated adhesive layer 50. The BOPP laser film is manufactured using the above-described method, and the laser holographic graphics on the BOPP laser film are transferred onto the SA20 melamine-coated adhesive layer.

[0069] The contents already described herein in this specification and accompanying drawings include examples of methods for preparing architectural wall decoration paper with holographic pattern effects. Of course, it is not possible to describe every conceivable combination of elements and / or methods for the purpose of describing the various features of this disclosure, but it will be appreciated that many other combinations and substitutions of the disclosed features are possible. Therefore, it will be apparent that various modifications can be made to this disclosure without departing from the scope or spirit of this disclosure. Furthermore, or in alternatives, other embodiments of this disclosure may become apparent from consideration of this specification and accompanying drawings and from practice of this disclosure as presented herein. It is intended that the examples presented in this specification and accompanying drawings be considered illustrative rather than limiting in all respects. Although specific terminology is used herein, it is used in a general and descriptive sense and is not intended for limiting purposes.

Claims

1. A method for preparing holographic pattern effect architectural wall decorative paper, characterized in that... The preparation method includes: Fabrication of BOPP laser film with laser holographic images; Print decorative graphics on decorative base paper; A layer of SA20 melamine adhesive is applied to the decorative graphic surface of the decorative base paper. The laser holographic images on the BOPP laser film are transferred to the SA20 surface-coated melamine adhesive layer; A backing adhesive layer is applied to the back of the decorative base paper to make architectural wall decorative paper; The steps for fabricating the BOPP laser film with laser holographic effect include: Making laser embossing plates; Unwind the BOPP base film and melt the surface of the BOPP base film; Laser holographic images are embossed onto a BOPP base film using a laser embossing plate. After the BOPP base film is cooled, it is peeled off to form a BOPP laser film.

2. The method for preparing holographic pattern effect architectural wall decoration paper according to claim 1, characterized in that, The step of unwinding the BOPP base film and melting the surface of the BOPP base film includes: Unwind the BOPP base film and heat its surface with a preheating roller at 120-130℃ to melt it.

3. The method for preparing holographic pattern effect architectural wall decoration paper according to claim 1, characterized in that, The step of using a laser molding plate to mold laser holographic images onto a BOPP base film includes: Using a pressure of 30-50 kg / cm2 and a speed of 25 m / min-35 m / min, the laser holographic image on the laser molding plate is transferred onto the BOPP film; during the transfer, the workshop temperature is 25-30℃ and the humidity is 50%-70%.

4. The method for preparing holographic pattern effect architectural wall decoration paper according to claim 1, characterized in that, The step of printing decorative graphics on the decorative base paper includes: Decorative graphics and text are printed on the decorative base paper using a gravure printing machine at a printing speed of not less than 100m / min; Use hot air drying at a temperature of 40-70℃.

5. The method for preparing holographic pattern effect architectural wall decoration paper according to claim 1, characterized in that, The step of transferring the laser holographic image on the BOPP laser film to the SA20 surface-coated melamine adhesive layer includes: Apply molding varnish over the melamine adhesive layer on the SA20 surface; The laser holographic image on the BOPP laser film is transferred onto the molding varnish and then cured.

6. The method for preparing holographic pattern effect architectural wall decoration paper according to claim 5, characterized in that, The molding varnish comprises: 5-15 parts acrylic resin, 45-70 parts acrylic emulsion, 0.5-1.5 parts leveling agent, 5-20 parts neutralizing agent, 10-30 parts water, and 5-15 parts reinforcing material, wherein the reinforcing material is inorganic whisker powder with a particle size of 10nm-50nm.

7. The method for preparing holographic pattern effect architectural wall decoration paper according to claim 1, characterized in that, The step of coating the back of the decorative base paper with a backing adhesive layer to produce architectural wall decorative paper includes: A back coating adhesive layer is applied to the back of the decorative base paper at a coating speed of 100 m / min. The back coating adhesive layer is dried at a temperature of 120-150℃.

8. The method for preparing holographic pattern effect architectural wall decoration paper according to claim 1, characterized in that, The steps for making the laser molding plate include: Laser patterns are set on nickel plates using laser direct writing or photomask exposure processes; UV varnish is applied to the resin plate, and the laser image on the nickel plate is transferred to the resin plate. UV varnish is applied to the seamless die-pressing roller to transfer the laser graphics on the resin plate to the seamless die-pressing roller to form a laser die-pressing plate.

9. A type of architectural wall decoration paper prepared by the preparation method as described in claim 5, characterized in that, The product comprises, in sequence, a BOPP laser film, an SA20 melamine-coated adhesive layer, decorative graphics, decorative base paper, and a back-coated adhesive layer; wherein the BOPP laser film is manufactured using the preparation method described in claim 1, and the laser holographic graphics on the BOPP laser film are transferred to the SA20 melamine-coated adhesive layer using the preparation method described in claim 1.

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