High-gram-weight folding-resistant transfer paperboard and preparation method thereof

Abstract

The invention provides a high-gram-weight folding-resistant transfer paperboard and a preparation method thereof.The preparation method comprises the steps that one surface of a carrier base film is coated with a first emulsion, drying is conducted to form a transfer assisting layer, and the first emulsion is formed by an acrylate copolymer, a styrene-maleic anhydride copolymer and water; forming a laser film layer comprising a UV film pressure information layer on the surface of the rotation assisting layer, wherein the UV film pressure information layer comprises epoxy resin, polyester acrylate, polyurethane acrylate and a photoinitiator; the thin paper layer is bonded to the laser film layer through second emulsion, the second emulsion is styrene, butadiene and acrylic acid polymerized emulsion, and the gram weight of the thin paper layer ranges from 80 g / m < 2 > to 120 g / m < 2 >; the paperboard layer is bonded to the thin paper layer through a third emulsion, the third emulsion is formed by mixing an acrylic acid copolymer emulsion of butyl acrylate-acrylic acid and a copolymer emulsion of styrene-acrylic acid, and the gram weight of the paperboard layer is 200-500 g / m < 2 >. The transfer paperboard provided by the invention has the advantage that the creases are not easy to burst, so that the problem of color burst of the creases after printing is solved.

Description

Technical Field

[0001] The invention relates to the technical field of application and processing of printing and packaging materials, and in particular to a high-weight, fold-resistant transfer cardboard and a preparation method thereof. Background Art

[0002] At present, laser transfer paper has been maturely applied to low grammage (80g / m 2 -250g / m 2 ) paper. Lay the laser transfer paper directly on 250g / m 2 When the above paper jams, the fold position will burst into color after printing, which cannot meet the folding requirements of the packaging box. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a high-weight, fold-resistant transfer card paper and a preparation method thereof. The high-weight, fold-resistant transfer card paper provided in the present application has the advantage of not being easy to burst at the crease, which is conducive to solving the problem of color bursting at the crease after printing.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] A method for preparing high-weight folding-resistant transfer cardboard comprises the following steps:

[0006] Applying a first emulsion on one surface of the carrier base film and drying to form a rotation-assisting layer, wherein the first emulsion is formed by an acrylic copolymer, a styrene-maleic anhydride copolymer and water;

[0007] A laser film layer is formed on the surface of the rotation-assisting layer away from the carrier base film, wherein the laser film layer comprises a UV film embossing information layer, and the UV film embossing information layer comprises epoxy resin, polyester acrylate, polyurethane acrylate and a photoinitiator;

[0008] The thin paper layer is bonded to the surface of the laser film layer away from the rotation-assisting layer by using a second emulsion, wherein the second emulsion is a polymerized emulsion of styrene, butadiene and acrylic acid, and the gram weight of the thin paper layer is 80-120 g / m 2 ;

[0009] The cardboard layer is bonded to the surface of the thin paper layer away from the laser film layer by using a third emulsion, wherein the third emulsion is formed by mixing a butyl acrylate-acrylic acid copolymer emulsion and a styrene-acrylic acid copolymer emulsion, and the gram weight of the cardboard layer is 200-500 g / m 2 ;

[0010] The carrier base film is peeled off.

[0011] In some possible embodiments, the ratio of the acrylic copolymer to styrene-maleic anhydride copolymer to water is 1.5:1:7.5 by weight, the acrylic copolymer is a copolymer of butyl acrylate and styrene, and the dry coating amount of the rotation-assisting layer is 1.2 g / m 2 .

[0012] In some possible embodiments, the photoinitiator includes photoinitiator 369 and photoinitiator 819, and the weight ratio of the epoxy resin: the polyester acrylate: the polyurethane acrylate: the photoinitiator 369: the photoinitiator 819 is 6:1.5:1.5:0.5:0.5.

[0013] In some possible implementations, the weight ratio of styrene:butadiene:acrylic acid is 2:2:6, and the wet coating amount of the second emulsion is 5.8-6.5 g / m 2 The curing temperature of the second emulsion is 60-100° C., and the laminating speed of the thin paper layer is 90-130 m / min.

[0014] In some possible implementations, the thin paper layer is naturally aged for at least 8 hours after being bonded together before bonding the cardboard layer.

[0015] In some possible implementations, the ratio of the butyl acrylate-acrylic acid copolymer emulsion to the styrene-acrylic acid copolymer emulsion is 1:1 by weight, and the wet coating amount of the third emulsion is 7.98-10 g / m 2 The heating temperature of the third emulsion is 60-90° C., and the laminating speed of the cardboard layer is 80-120 m / mim.

[0016] In some possible implementations, the laser film layer further includes a dielectric layer, and the dielectric layer covers the surface of the UV film embossing information layer facing away from the carrier base film.

[0017] The present application also provides a high-weight, fold-resistant transfer card paper, comprising:

[0018] A rotation-assisting layer, wherein the rotation-assisting layer is obtained by drying a first emulsion, wherein the first emulsion is formed by an acrylic copolymer, a styrene-maleic anhydride copolymer and water;

[0019] A laser film layer covers a surface of the rotation-assisting layer, wherein the laser film layer comprises a UV film embossing information layer, and the UV film embossing information layer comprises epoxy resin, polyester acrylate, polyurethane acrylate and a photoinitiator;

[0020] The thin paper layer is bonded to the surface of the laser film layer away from the rotation-assisting layer through a second emulsion, wherein the second emulsion is a polymerized emulsion of styrene, butadiene and acrylic acid, and the gram weight of the thin paper layer is 80-120 g / m 2 ;as well as

[0021] The cardboard layer is bonded to the surface of the thin paper layer away from the laser film layer through a third emulsion, wherein the third emulsion is formed by mixing an acrylic acid copolymer emulsion of butyl acrylate-acrylic acid and a styrene-acrylic acid copolymer emulsion, and the gram weight of the cardboard layer is 200-500 g / m 2 .

[0022] In some possible implementations, the ratio of the acrylic acid ester copolymer: styrene-maleic anhydride copolymer: water is 1.5:1:7.5 by weight, and the acrylic acid ester copolymer is a copolymer of butyl acrylate and styrene;

[0023] The photoinitiator includes a photoinitiator 369 and a photoinitiator 819, and by weight, the epoxy resin: the polyester acrylate: the polyurethane acrylate: the photoinitiator 369: the photoinitiator 819 is 6:1.5:1.5:0.5:0.5;

[0024] By weight, the styrene: the butadiene: the acrylic acid is 2:2:6;

[0025] By weight, the ratio of the butyl acrylate-acrylic acid copolymer emulsion to the styrene-acrylic acid copolymer emulsion is 1:1.

[0026] In some possible implementations, the dry coating amount of the rotation-assisting layer is 1.2 g / m 2 The wet coating amount of the second emulsion is 5.8-6.5 g / m 2 The wet coating amount of the third emulsion is 8-10g / m 2 .

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] In the present application, the resins of each functional layer are formed by selecting the first emulsion, the second emulsion, the third emulsion and the UV film embossing information layer with similar shrinkage ratios and systems, so as to reduce the breakage of the film-forming layer due to different shrinkages, and adopt a multi-layer lamination method in which the thin paper layer is laminated by the second emulsion and the cardboard layer is laminated by the third emulsion, so that the second emulsion and the third emulsion cooperate to improve the flexibility between the paper layers and make the paper layers elastic, so that the creases are not easy to burst, thereby solving the problem of color bursting at the creases after printing.

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a cross-sectional view of forming a rotation-assisting layer on a carrier base film according to an embodiment of the present application;

[0031] Figure 2 For Figure 1 A cross-sectional view of a laser film layer formed on the rotation-assisting layer shown;

[0032] Figure 3 For Figure 2 A cross-sectional view of the laser film layer bonded to the thin paper layer is shown;

[0033] Figure 4 For Figure 3 A cross-sectional view of a thin paper layer bonded to a cardboard layer is shown;

[0034] Figure 5 For peeling Figure 4 A cross-sectional view of the carrier base film shown;

[0035] Figure 6 The test results of the comparative samples after printing and folding;

[0036] Figure 7 The test results are shown in Figure 2 after the samples of the embodiment are printed and folded.

[0037] Description of Figure Numbers:

[0038] 10 - carrier base film; 20 - transfer-assisting layer; 30 - laser film layer; 31 - UV film embossing information layer; 32 - medium layer; 40 - thin paper layer; 50 - cardboard layer. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can be a centered element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a centered element. When an element is referred to as "arranged on" another element, it can be arranged on the other element or there can be a centered element.

[0041] An embodiment of the present application provides a method for preparing a high-weight, fold-resistant transfer cardboard, comprising the following steps:

[0042] Step 1, refer to Figure 1 , a first emulsion is coated on one surface of the carrier base film 10 and dried to form a rotation-assisting layer 20, wherein the first emulsion is formed by an acrylic copolymer, a styrene-maleic anhydride copolymer and water. Exemplarily, the first emulsion can be dried naturally or in an oven. Exemplarily, the carrier base film 10 can be made of a plastic material, such as polyurethane, polyester, polyimide, polyethylene or polypropylene.

[0043] In some embodiments, by weight, the ratio of the acrylic copolymer to the styrene-maleic anhydride copolymer to water is 1.5:1:7.5, and the acrylic copolymer is a copolymer of butyl acrylate and styrene. Exemplarily, the acrylic copolymer may be ZFT-001 provided by Shanghai Weike Optoelectronics New Materials Co., Ltd. Exemplarily, the styrene-maleic anhydride copolymer may be ZFT-002 provided by Shanghai Weike Optoelectronics New Materials Co., Ltd. The dry coating amount of the transfer-assisting layer is 1.2 g / m 2 The selection of the above-mentioned acrylic copolymer and the adjustment of the configuration of the first emulsion are conducive to adjusting the shrinkage ratio of the rotation-assisting layer 20, so that the shrinkage ratios of the resins in different layers are closer, thereby further reducing the probability of the film-forming layer breaking due to different shrinkage.

[0044] Step 2, refer to Figure 2 A laser film layer 30 is formed on the surface of the transfer-assisting layer 20 away from the carrier base film 10. The laser film layer 30 includes a UV film embossing information layer 31. The UV film embossing information layer 31 includes epoxy resin, polyester acrylate, polyurethane acrylate and a photoinitiator. Specifically, UV varnish can be applied on the transfer-assisting layer 20 and then molded and cured using a UV molding machine, so that the laser information on the laser nickel plate is copied to the cured UV varnish to form the UV film embossing information layer 31. The UV varnish can be cured using an ultraviolet lamp.

[0045] In some embodiments, the photoinitiator includes a photoinitiator 369 and a photoinitiator 819, and the weight ratio of the epoxy resin: the polyester acrylate: the polyurethane acrylate: the photoinitiator 369: the photoinitiator 819 is 6:1.5:1.5:0.5:0.5. The component setting of the UV film pressed information layer 31 is also conducive to adjusting the shrinkage ratio, thereby further reducing the probability of the film forming layer breaking due to different shrinkage.

[0046] For example, the epoxy resin may be an acrylic epoxy resin. The resins of the UV film embossed information layer 31 can be purchased from Shanghai Weikai Optoelectronic New Materials Co., Ltd.

[0047] In some embodiments, the laser film layer 30 also includes a dielectric layer 32, which covers the surface of the UV film information layer 31 facing away from the carrier base film 10. For example, the dielectric layer 32 can be formed by vacuum evaporation of aluminum or zinc sulfide, so that the laser film layer 30 has a metallic texture or color effect.

[0048] Step 3, refer to Figure 3 The thin paper layer 40 is bonded to the surface of the laser film layer 30 away from the transfer-assisting layer 20 by using the second emulsion. The second emulsion is a polymerized emulsion of styrene, butadiene and acrylic acid. The weight of the thin paper layer 40 is 80-120 g / m 2 For example, the thin paper layer 40 can be coated paper, corrugated paper, grey paperboard or white paper. In this embodiment, the thin paper layer 40 is bonded to the surface of the medium layer 32 away from the rotation-assisting layer 20 .

[0049] In some embodiments, the ratio of styrene to butadiene to acrylic acid is 2:2:6 by weight, and the wet coating amount of the second emulsion is 5.8-6.5 g / m 2 The curing temperature of the second emulsion is 60-100° C., and the laminating speed of the thin paper layer 40 is 90-130 m / min.

[0050] In some embodiments, the thin paper layer 40 is naturally aged after lamination for at least 8 hours before the following steps are performed. The natural aging operation is conducive to the penetration of the glue layer and the paper surface, thereby improving stability.

[0051] Step 4, refer to Figure 4 The cardboard layer 50 is bonded to the surface of the thin paper layer 40 away from the laser film layer 30 by using the third emulsion. The third emulsion is formed by mixing butyl acrylate-acrylic acid copolymer emulsion and styrene-acrylic acid copolymer emulsion. The cardboard layer 50 has a gram weight of 200-500 g / m 2 .

[0052] In some embodiments, the ratio of the butyl acrylate-acrylic acid copolymer emulsion to the styrene-acrylic acid copolymer emulsion is 1:1 by weight, and the wet coating amount of the third emulsion is 7.98-10 g / m 2 The heating temperature of the third emulsion is 60-90°C, and the laminating speed of the cardboard layer 50 is 80-120m / mim. The process parameters of the third emulsion are also conducive to adjusting the shrinkage ratio, thereby further reducing the probability of the film-forming layer breaking due to different shrinkage. In addition, the process parameters of the third emulsion are also conducive to reducing the water content of the product.

[0053] For example, the butyl acrylate-acrylic acid copolymer emulsion may be ZFT-1001 provided by Shanghai Weikai Optoelectronic New Materials Co., Ltd.

[0054] For example, the styrene-acrylic copolymer emulsion may be ZFT-2001 provided by Shanghai Weikai Optoelectronic New Materials Co., Ltd.

[0055] Step 5, refer to Figure 4 and Figure 5 The carrier base film 10 is peeled off to obtain a high-weight, fold-resistant transfer card paper.

[0056] It is understandable that the selection of specific grammages of the thin paper layer 40 and the cardboard layer 50 does not affect the flexibility between the layers, but only changes the grammages of the finished products.

[0057] Reference Figure 5 Another embodiment of the present application also provides a high-weight folding-resistant transfer card paper, which includes a transfer-assisting layer 20, a laser film layer 30, a thin paper layer 40 and a card paper layer 50. The transfer-assisting layer 20 is obtained by drying a first emulsion, and the first emulsion is formed by an acrylic copolymer, a styrene-maleic anhydride copolymer and water. The laser film layer 30 covers a surface of the transfer-assisting layer 20, and the laser film layer 30 includes a UV film embossing information layer 31, and the UV film embossing information layer 31 includes an epoxy resin, a polyester acrylate, a polyurethane acrylate and a photoinitiator. The thin paper layer 40 is bonded to the surface of the laser film layer 30 that is away from the transfer-assisting layer 20 through a second emulsion. The second emulsion is a styrene, butadiene and acrylic polymer emulsion, and the weight of the thin paper layer 40 is 80-120 g / m 2 The cardboard layer 50 is bonded to the surface of the thin paper layer 40 away from the laser film layer 30 by the third emulsion. The third emulsion is formed by mixing butyl acrylate-acrylic acid copolymer emulsion and styrene-acrylic acid copolymer emulsion. The cardboard layer 50 has a gram weight of 200-500 g / m 2 .

[0058] In some embodiments, the laser film layer 30 further includes a dielectric layer 32 . The dielectric layer 32 covers the surface of the UV film embossed information layer 31 facing away from the transfer-assisting layer 20 .

[0059] In some embodiments, by weight, the ratio of the acrylate copolymer: styrene-maleic anhydride copolymer: water is 1.5:1:7.5, and the acrylate copolymer is a copolymer of butyl acrylate and styrene. The photoinitiator includes photoinitiator 369 and photoinitiator 819, and by weight, the ratio of the epoxy resin: the polyester acrylate: the polyurethane acrylate: the photoinitiator 369: the photoinitiator 819 is 6:1.5:1.5:0.5:0.5. By weight, the ratio of styrene: the butadiene: the acrylic acid is 2:2:6. By weight, the ratio of the butyl acrylate-acrylic acid acrylic copolymer emulsion: the styrene-acrylic acid copolymer emulsion is 1:1.

[0060] In some embodiments, the dry coating weight of the rotation-assisting layer 20 is 1.2 g / m 2 The wet coating amount of the second emulsion is 5.8-6.5 g / m 2 The wet coating amount of the third emulsion is 8-10g / m 2 .

[0061] Since the components of each layer in this embodiment are the same as the components of each corresponding layer in the preparation method, they will not be described in detail.

[0062] Embodiment 1:

[0063] A first emulsion is applied to one surface of the carrier base film 10 and dried to form a rotation-assisting layer 20. The first emulsion is formed by an acrylic copolymer, a styrene-maleic anhydride copolymer and water. The weight ratio of the acrylic copolymer: the styrene-maleic anhydride copolymer: the water is 1.5:1:7.5. The acrylic copolymer is a copolymer of butyl acrylate and styrene. The dry coating weight of the rotation-assisting layer 20 is 1.2 g / m 2 The acrylic copolymer is ZFT-001 provided by Shanghai Weikai Optoelectronic New Materials Co., Ltd. The styrene-maleic anhydride copolymer is ZFT-002 provided by Shanghai Weikai Optoelectronic New Materials Co., Ltd.

[0064] A laser film layer 30 is formed on the surface of the rotation-assisting layer 20 away from the carrier base film 10. The laser film layer 30 includes a UV film-pressed information layer 31. The UV film-pressed information layer 31 includes epoxy resin, polyester acrylate, polyurethane acrylate and a photoinitiator. Specifically, UV varnish can be applied on the rotation-assisting layer and then cured by molding with a UV molding machine, so that the laser information on the laser nickel plate is copied to the cured UV varnish to form the UV film-pressed information layer 31. The laser film layer 30 also includes a dielectric layer 32, which covers the surface of the UV film-pressed information layer 31 away from the rotation-assisting layer 20. The dielectric layer 32 can be formed by vacuum evaporation of aluminum. The photoinitiator includes a photoinitiator 369 and a photoinitiator 819. By weight, the epoxy resin: the polyester acrylate: the polyurethane acrylate: the photoinitiator 369: the photoinitiator 819 is 6:1.5:1.5:0.5:0.5. The epoxy resin is ZFT-1002 provided by Shanghai Weike Optoelectronic New Materials Co., Ltd., the polyester acrylate is ZFT-1003 provided by Shanghai Weike Optoelectronic New Materials Co., Ltd., and the polyurethane acrylate is ZFT-1004 provided by Shanghai Weike Optoelectronic New Materials Co., Ltd.

[0065] The thin paper layer 40 is bonded to the surface of the laser film layer 30 away from the rotation-assisting layer 20 by using a second emulsion, wherein the second emulsion is a polymerized emulsion of styrene, butadiene and acrylic acid, and the gram weight of the thin paper layer is 115 g / m 2 The thin paper layer is single copper paper, and the ratio of styrene:butadiene:acrylic acid is 2:2:6 by weight, and the wet coating amount of the second emulsion is 6 g / m 2 The curing temperature of the second emulsion is 105° C., and the laminating speed of the thin paper layer 40 is 105 m / min. The thin paper layer 40 is naturally aged for 8 hours after lamination.

[0066] The cardboard layer 50 is bonded to the surface of the thin paper layer 40 away from the laser film layer 30 by using a third emulsion, wherein the third emulsion is formed by mixing a butyl acrylate-acrylic acid copolymer emulsion and a styrene-acrylic acid copolymer emulsion. The cardboard layer 50 has a gram weight of 200 g / m 2 By weight, the ratio of the butyl acrylate-acrylic acid copolymer emulsion to the styrene-acrylic acid copolymer emulsion is 1:1, and the wet coating amount of the third emulsion is 8.22 g / m 2 The heating temperature of the third emulsion is 90°C, and the laminating speed of the cardboard layer 50 is 80m / mim. The butyl acrylate-acrylic acid copolymer emulsion is FH-035 provided by Shantou Xinyuan Chemical Technology Co., Ltd. The styrene-acrylic acid copolymer emulsion is FH-036 provided by Shantou Xinyuan Chemical Technology Co., Ltd.

[0067] The carrier base film 10 is peeled off to obtain a high-weight folding-resistant transfer cardboard, and the corresponding measured moisture content of the product is 7.05%.

[0068] Embodiment 2:

[0069] The difference from Example 1 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The curing temperature of the second emulsion is 115°C, and the laminating speed of the thin paper layer is 115 m / min. The wet coating amount of the third emulsion is 8.25 g / m 2 The laminating speed of the cardboard layer is 90 m / min. The corresponding measured moisture content of the product is 7.15%.

[0070] Embodiment 3:

[0071] The difference from Example 1 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The laminating speed of the thin paper layer 40 is 115 m / min. The wet coating amount of the third emulsion is 8.12 g / m 2 The heating temperature of the third emulsion is 80° C., and the laminating speed of the cardboard layer 50 is 100 m / mim. The corresponding measured moisture content of the product is 7.33%.

[0072] Embodiment 4:

[0073] The difference from Example 1 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The laminating speed of the thin paper layer 40 is 115 m / min. The wet coating amount of the third emulsion is 8.10 g / m 2 The heating temperature of the third emulsion is 70° C., and the laminating speed of the cardboard layer 50 is 110 m / mim. The corresponding measured moisture content of the product is 7.38%.

[0074] Embodiment 5:

[0075] The difference from Example 1 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The laminating speed of the thin paper layer 40 is 115 m / min. The wet coating amount of the third emulsion is 8.05 g / m 2 The heating temperature of the third emulsion is 70° C., and the laminating speed of the cardboard layer 50 is 120 m / mim. The corresponding measured moisture content of the product is 7.35%.

[0076] Embodiment 6:

[0077] The difference from Example 1 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The laminating speed of the thin paper layer 40 is 115m / min. The weight of the cardboard layer 50 is 300g / m 2The wet coating amount of the third emulsion is 8.05 g / m 2 The heating temperature of the third emulsion is 60° C., and the laminating speed of the cardboard layer 50 is 120 m / mim. The corresponding measured moisture content of the product is 7.55%.

[0078] Embodiment 7:

[0079] The difference from Example 6 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The laminating speed of the thin paper layer 40 is 115 m / min. The wet coating amount of the third emulsion is 8.31 g / m 2 The laminating speed of the cardboard layer 50 is 90 m / mim, and the heating temperature of the third emulsion is 70° C. The corresponding measured moisture content of the product is 7.58%.

[0080] Embodiment 8:

[0081] The difference from Example 6 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The laminating speed of the thin paper layer 40 is 125 m / min. The wet coating amount of the third emulsion is 8.28 g / m 2 The laminating speed of the cardboard layer 50 is 100 m / mim, and the heating temperature of the third emulsion is 60° C. The corresponding measured moisture content of the product is 7.92%.

[0082] Embodiment 9:

[0083] The difference from Example 6 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The laminating speed of the thin paper layer 40 is 125 m / min. The wet coating amount of the third emulsion is 8.11 g / m 2 The laminating speed of the cardboard layer 50 is 110 m / mim, and the heating temperature of the third emulsion is 60° C. The corresponding measured moisture content of the product is 8.05%.

[0084] Embodiment 10:

[0085] The difference from Example 6 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The laminating speed of the thin paper layer 40 is 115 m / min. The wet coating amount of the third emulsion is 8.05 g / m 2 The laminating speed of the cardboard layer 50 is 120 m / mim, and the heating temperature of the third emulsion is 60° C. The corresponding measured moisture content of the product is 8.11%.

[0086] Embodiment 11:

[0087] The difference from Example 1 is that the wet coating amount of the second emulsion is 6.5 g / m 2The laminating speed of the thin paper layer 40 is 115m / min. The gram weight of the cardboard layer 50 is 350g / m 2 The wet coating amount of the third emulsion is 8.67 g / m 2 The laminating speed of the cardboard layer 50 is 90 m / mim, and the heating temperature of the third emulsion is 80° C. The corresponding measured moisture content of the product is 7.88%.

[0088] Embodiment 12:

[0089] The difference from Example 11 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The wet coating amount of the third emulsion is 8.51 g / m 2 The laminating speed of the cardboard layer 50 is 90 m / mim, and the heating temperature of the third emulsion is 70° C. The corresponding measured moisture content of the product is 7.92%.

[0090] Embodiment 13:

[0091] The difference from Example 11 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The wet coating amount of the third emulsion is 8.32 g / m 2 The laminating speed of the cardboard layer 50 is 100 m / mim, and the heating temperature of the third emulsion is 70° C. The corresponding measured moisture content of the product is 8.05%.

[0092] Embodiment 14:

[0093] The difference from Example 11 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The wet coating amount of the third emulsion is 8.09 g / m 2 The laminating speed of the cardboard layer 50 is 110 m / mim, and the heating temperature of the third emulsion is 70° C. The corresponding measured moisture content of the product is 8.11%.

[0094] Embodiment 15:

[0095] The difference from Example 11 is that the wet coating amount of the second emulsion is 6.5 g / m 2 The wet coating amount of the third emulsion is 7.98 g / m 2 The laminating speed of the cardboard layer 50 is 120 m / mim, and the heating temperature of the third emulsion is 70° C. The corresponding measured moisture content of the product is 8.25%.

[0096] Comparative Example 1:

[0097] The difference from Example 6 is that the step of bonding the thin paper layer 40 with the second emulsion is omitted, and the cardboard layer 50 is directly bonded to the surface of the laser film layer 30 away from the transfer-assisting layer 20 with the third emulsion.

[0098] The transfer cardboard of the above-mentioned embodiment and comparative example can be cut into samples of the same direction and size (for example, 25cm*15cm in size, and the size can be adjusted according to the size of the color display instrument), and then the samples of the embodiment and comparative example are simultaneously displayed by an offset color display instrument or an offset printing press, and then the temporary color samples are folded 180° and observed for cracking at the crease, thereby measuring the color explosion of the samples.

[0099] The moisture content can be measured by the moisture content (water content) test standard (GB / T462-2003 "Determination of moisture content of paper and paperboard").

[0100] The test results of the above comparative examples and embodiments are as follows Figure 6 and Figure 7 shown.

[0101] From the folding test results, it can be seen that the high-weight folding-resistant transfer cardboard provided by the present application can solve the problem of crease color explosion after printing. A comparative test was conducted. From the test process, it can be seen that with the same weight of base paper, the speed increased, the amount of glue gradually decreased, and the overall moisture content of the paper increased.

[0102] In the present application, the resins of each functional layer are formed by selecting the first emulsion, the second emulsion, the third emulsion and the UV film embossing information layer 31 with similar shrinkage ratios and systems, so as to reduce the breakage of the film-forming layer due to different shrinkages, and adopt a multi-layer lamination method in which the thin paper layer 40 is laminated by the second emulsion and the cardboard layer 50 is laminated by the third emulsion, so that the second emulsion and the third emulsion cooperate to improve the flexibility between the paper layers and make the paper layers elastic, so that the creases are not easy to burst, thereby solving the problem of color bursting at the creases after printing.

[0103] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A method for preparing high-weight folding-resistant transfer cardboard, characterized in that: The steps include: Applying a first emulsion on one surface of the carrier base film and drying to form a rotation-assisting layer, wherein the first emulsion is formed by an acrylic copolymer, a styrene-maleic anhydride copolymer and water; A laser film layer is formed on the surface of the rotation-assisting layer away from the carrier base film, wherein the laser film layer comprises a UV film embossing information layer, and the UV film embossing information layer comprises epoxy resin, polyester acrylate, polyurethane acrylate and a photoinitiator; The thin paper layer is bonded to the surface of the laser film layer away from the rotation-assisting layer by using a second emulsion, wherein the second emulsion is a polymerized emulsion of styrene, butadiene and acrylic acid, and the gram weight of the thin paper layer is 80-120 g / m 2 ; The cardboard layer is bonded to the surface of the thin paper layer away from the laser film layer by using a third emulsion, wherein the third emulsion is formed by mixing a butyl acrylate-acrylic acid copolymer emulsion and a styrene-acrylic acid copolymer emulsion, and the gram weight of the cardboard layer is 200-500 g / m 2 ; The carrier base film is peeled off.

2. The preparation method according to claim 1, characterized in that By weight, the ratio of the acrylic copolymer: styrene-maleic anhydride copolymer: water is 1.5:1:7.5, the acrylic copolymer is a copolymer of butyl acrylate and styrene, and the dry coating amount of the rotation-assisting layer is 1.2 g / m 2 .

3. The preparation method according to claim 2, characterized in that: The photoinitiator includes photoinitiator 369 and photoinitiator 819. By weight, the epoxy resin: the polyester acrylate: the polyurethane acrylate: the photoinitiator 369: the photoinitiator 819 is 6:1.5:1.5:0.5:0.

5.

4. The preparation method according to claim 3, characterized in that: By weight, the ratio of styrene to butadiene to acrylic acid is 2:2:6, and the wet coating amount of the second emulsion is 5.8-6.5 g / m 2 The curing temperature of the second emulsion is 60-100° C., and the laminating speed of the thin paper layer is 90-130 m / min.

5. The preparation method according to claim 1, characterized in that: After the thin paper layer is pasted, it is naturally cured for at least 8 hours before pasting the cardboard layer.

6. The preparation method according to claim 4, characterized in that: By weight, the ratio of the butyl acrylate-acrylic acid copolymer emulsion to the styrene-acrylic acid copolymer emulsion is 1:1, and the wet coating amount of the third emulsion is 7.98-10 g / m 2 The heating temperature of the third emulsion is 60-90° C., and the laminating speed of the cardboard layer is 80-120 m / mim.

7. The preparation method according to any one of claims 1 to 6, characterized in that: The laser film layer further comprises a dielectric layer, and the dielectric layer covers the surface of the UV film pressed information layer away from the carrier base film.

8. A high-weight folding-resistant transfer cardboard, characterized in that: include: A rotation-assisting layer, wherein the rotation-assisting layer is obtained by drying a first emulsion, wherein the first emulsion is formed by an acrylic copolymer, a styrene-maleic anhydride copolymer and water; A laser film layer covers a surface of the rotation-assisting layer, wherein the laser film layer comprises a UV film embossing information layer, and the UV film embossing information layer comprises epoxy resin, polyester acrylate, polyurethane acrylate and a photoinitiator; The thin paper layer is bonded to the surface of the laser film layer away from the rotation-assisting layer through a second emulsion, wherein the second emulsion is a polymerized emulsion of styrene, butadiene and acrylic acid, and the gram weight of the thin paper layer is 80-120 g / m 2 ;as well as The cardboard layer is bonded to the surface of the thin paper layer away from the laser film layer through a third emulsion, wherein the third emulsion is formed by mixing an acrylic acid copolymer emulsion of butyl acrylate-acrylic acid and a styrene-acrylic acid copolymer emulsion, and the gram weight of the cardboard layer is 200-500 g / m 2 .

9. The high-weight folding-resistant transfer cardboard according to claim 8, characterized in that: By weight, the ratio of the acrylic ester copolymer: styrene-maleic anhydride copolymer: water is 1.5:1:7.5, and the acrylic ester copolymer is a copolymer of butyl acrylate and styrene; The photoinitiator includes a photoinitiator 369 and a photoinitiator 819, and by weight, the epoxy resin: the polyester acrylate: the polyurethane acrylate: the photoinitiator 369: the photoinitiator 819 is 6:1.5:1.5:0.5:0.5; By weight, the styrene: the butadiene: the acrylic acid is 2:2:6; By weight, the ratio of the butyl acrylate-acrylic acid copolymer emulsion to the styrene-acrylic acid copolymer emulsion is 1:

1.

10. The high-weight folding-resistant transfer cardboard according to claim 9, characterized in that: The dry coating amount of the rotation-assisting layer is 1.2 g / m 2 The wet coating amount of the second emulsion is 5.8-6.5 g / m 2 The wet coating amount of the third emulsion is 8-10g / m 2 .

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