Flexible wallpaper base material, production method therefor and use thereof

Abstract

The present invention relates to the technical field of wall cloths. Disclosed are a flexible wallpaper base material, a production method therefor and the use thereof. The flexible wallpaper base material comprises an original base material layer (1) and a primer layer (2), the whole surface of which is arranged on the original base material layer (1). The coating amount of the primer layer (2) is 20-150 g / m2, and the primer layer (2) comprises the following components in parts by mass: 30-60 parts of a polyvinyl chloride resin; 10-20 parts of an ethylene-vinyl acetate copolymer resin; 20-40 parts of diisononyl phthalate; 15-30 parts of tetrahydrofuran; 30-60 parts of a filler; 1-10 parts of a diluent; 2-5 parts of a composite stabilizer; 0.1-0.5 parts of dicumyl peroxide; and 0.05-0.15 parts of an antioxidant. The wallpaper base material has good flexibility and good light fastness, and the prepared wallpaper base material is controllable in terms of apparent color, easy to produce and convenient to use.

Description

Flexible wallpaper substrate, production method and application Technical Field

[0001] The present invention relates to the technical field of wall cloth, in particular to a flexible wallpaper substrate, a production method and an application thereof. Background Art

[0002] Wallpaper, also known as wall paper, is an interior decoration material used for wall coverings. It is widely used in the interior decoration of homes, offices, guesthouses, and hotels. Its diverse colors, rich patterns, luxurious style, and easy installation make it unmatched by other interior decoration materials. Wallpaper base materials are not limited to paper and can also be made from other materials, which is the main reason for its diverse variety.

[0003] Among wallpaper types, non-woven paper wallpaper is a relatively traditional and simple wallpaper. In production, non-woven paper is generally used as the base material, and a simple non-woven paper wallpaper is obtained by printing a pattern on the surface. Generally, the pattern of non-woven paper wallpaper is set with the base material as the background. At this time, there is a demand for the color of the non-woven paper. However, the surface of the current non-woven paper varies from batch to batch or manufacturer to manufacturer, and the finished wallpaper often has obvious color differences. To prevent the occurrence of obvious color differences, manufacturers generally print an extra layer of white slurry in a production process, dry the slurry, and then print the pattern. However, for small or micro-sized wallpaper companies that pursue quality, printing an extra layer requires two more processes, and accordingly, an extra printing station and an extra long drying oven are required, which is not effective due to the site and scale. Alternatively, a batch printing method can be used, which requires an extra workload of debugging the machine and occupies the production of other wallpaper products, but reduces production efficiency. It is of great significance to develop a convenient wallpaper substrate that is convenient for small wallpaper companies to use. Summary of the Invention

[0004] To solve the above problems, the present invention provides a flexible wallpaper substrate and its production method and application. The wallpaper substrate has good flexibility and light resistance, and the surface color of the prepared wallpaper substrate is controllable, easy to produce and convenient to use.

[0005] To achieve the above object, the technical solution adopted by the present invention is to provide a flexible wallpaper substrate, comprising an original substrate layer and a primer layer entirely provided on the original substrate layer, wherein the coating amount of the primer layer is 20-150g / m 2 , the primer layer includes the following components in parts by mass:

[0006] 30-60 parts of polyvinyl chloride resin;

[0007] 10-20 parts of ethylene-vinyl acetate copolymer resin;

[0008] 20-40 parts of diisononyl phthalate;

[0009] 15-30 parts of tetrahydrofuran;

[0010] 30-60 parts of filler;

[0011] 1-10 parts of diluent;

[0012] 2-5 parts of composite stabilizer;

[0013] 0.1-0.5 parts of dicumyl peroxide;

[0014] 0.05-0.15 parts of antioxidant;

[0015] The composite stabilizer is a mixture of epoxidized soybean oil and barium zinc stabilizer in a mass ratio of 1-2:1.5;

[0016] The filler is composed of rutile titanium dioxide, light calcium carbonate and zinc oxide in a mass ratio of 1:8:(0.01-0.05), the particle size of the filler is 0.5-5 μm, and the filler particles with a particle size of 0.5-2 μm account for 80-100%;

[0017] Wherein, the diluent is one of dodecylbenzene, No. 200 solvent gasoline or a mixture thereof;

[0018] The antioxidant is composed of 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane and dilauryl thiodipropionate in a mass ratio of 2:1.

[0019] Furthermore, the primer layer further comprises a mildew preventer, the addition amount of the mildew preventer is 0.2-1 parts, and the active ingredient of the mildew preventer is ≥5%.

[0020] Furthermore: the mildew preventer is an isothiazolinone mildew preventer, specifically a compound of 1,2-benzisothiazolin-3-one and 2-methyl-4-isothiazolin-3-one in a mass ratio of 1:1.

[0021] Furthermore, the primer layer further comprises an azodicarbonamide foaming agent, and the added amount of the azodicarbonamide foaming agent is 1-4 parts.

[0022] Furthermore: the primer layer also includes a whitening agent, and the mass ratio of the added amount of the whitening agent to the primer is (0.0001-0.0005):1.

[0023] Furthermore: A method for producing a flexible wallpaper substrate comprises the following steps:

[0024] S1. Prepare ordinary wallpaper substrate;

[0025] S2. Prepare primer:

[0026] (S21): adding ethylene-vinyl acetate copolymer resin into tetrahydrofuran to dissolve it, and after the dissolution is complete, obtaining a polymer elastomer for standby use;

[0027] (S22): weighing the raw materials of the components except the ethylene-vinyl acetate copolymer resin, tetrahydrofuran and polyvinyl chloride, adding them to a stirring kettle, stirring at room temperature for 30-60 minutes, then adding the polymer elastomer obtained in (S21), and continuing to stir evenly to obtain a premix;

[0028] (S23): adding polyvinyl chloride to the premix obtained in (S22), stirring for 20-30 minutes to obtain a paste resin;

[0029] S3, the paste resin prepared in (S23) is heated to 20-150 g / m 2 Print / scalpel / spray the paste onto the surface of the substrate, dry it at 140-200° C. for 0.5-5 minutes, and dry the paste resin into a shape to obtain the wallpaper substrate.

[0030] Furthermore: the method further comprises foaming the wallpaper substrate obtained in (S3) at 150-180°C, and then embossing while hot to obtain a wallpaper substrate with a texture effect.

[0031] Further: A flexible wallpaper substrate produced by the method for producing a flexible wallpaper substrate according to claim 6 or 7 is used in a mildew-proof wallpaper, wherein the flexible wallpaper substrate is coated with 20-60g / m 2 Patterns are printed on a flexible wallpaper substrate with an anti-mildew primer to obtain anti-mildew wallpaper.

[0032] Further: A flexible wallpaper substrate produced by the method for producing a flexible wallpaper substrate according to claim 6 or 7 is used in a high white mildew proof wallpaper, wherein the flexible wallpaper substrate is coated with 20-80g / m 2 Patterns are printed on a flexible wallpaper substrate with a high-white mildew-proof primer to obtain high-white mildew-proof wallpaper.

[0033] Further: A flexible wallpaper substrate produced by the method for producing a flexible wallpaper substrate according to claim 6 or 7 is used in wallpaper with a three-dimensional effect, when coated with 60-150g / m 2 Apply ordinary paint / color painting on the flexible wallpaper substrate that has been primed, foamed at high temperature and embossed to obtain wallpaper with a three-dimensional effect.

[0034] Beneficial effects of the present invention:

[0035] The present invention provides a flexible wallpaper substrate, which is coated with a primer on the original substrate to obtain the following effects:

[0036] 1. It can effectively reduce the color difference of the original substrate surface and obtain a wallpaper substrate with relatively stable surface properties;

[0037] 2. Protect the surface of the original substrate. In actual use, when the original substrate is exposed to light, the chemical fibers in the paper or cloth will age. The primer provided in this solution has good weather resistance. Applying the primer on the surface of the original substrate can achieve a good sunlight isolation effect, making the treated wallpaper substrate less likely to turn yellow. In addition, the finished wallpaper made with this wallpaper substrate as the background can maintain a good pattern presentation effect.

[0038] 3. The prepared wallpaper substrate can be used directly, especially for small and micro wallpaper production enterprises, it can be directly used for wallpaper production, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] FIG1 is a schematic structural diagram of a flexible wallpaper substrate;

[0040] FIG2 is a schematic structural diagram of another flexible wallpaper substrate;

[0041] Figure 3 shows the original substrate layer exposed to sunlight and aging and yellowing (left) and the substrate layer not exposed to sunlight and remaining white (right);

[0042] FIG4 is a rendering of the ordinary polyvinyl chloride substrate of comparative example 2, which appears yellowish and dark (left), and the high-white foamed substrate of examples 2-5 of the present technical solution, which appears white (right).

[0043] Explanation of the accompanying figures: 1. Original substrate layer; 2. Primer layer. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] Since the surface properties of the same / different wallpaper original substrates on the market are somewhat different, direct use is prone to problems such as obvious color difference, poor effect, and increased process steps. In order to reduce the aforementioned problems, the present invention provides a wallpaper substrate, which is coated with a primer on the original substrate to obtain the following effects: first, it can effectively reduce the color difference on the surface of the original substrate and obtain a wallpaper substrate with relatively stable surface properties; second, it protects the surface of the original substrate, because in actual use, when the original substrate is exposed to light, the chemical fibers in the paper or cloth will age, as shown on the left side of Figure 3; then, through the primer setting of this scheme, the primer has good weather resistance, and setting the primer on the surface of the original substrate can play a good sunlight isolation effect, so that the treated wallpaper substrate is not easy to turn yellow. In addition, the wallpaper finished product made with this wallpaper substrate as the background can maintain a good pattern presentation effect; third, the prepared wallpaper substrate can be directly used, especially for small and micro wallpaper production enterprises, it can be directly used in wallpaper production, which is very convenient.

[0046] The present invention provides a wallpaper substrate, as shown in Figures 1-2, comprising an original substrate layer 1 and a primer layer 2 entirely disposed on the original substrate layer 1, wherein the coating amount of the primer layer 2 is 20-150 g / m 2 , the primer layer 2 includes the following components in parts by mass:

[0047] 30-60 parts of polyvinyl chloride resin;

[0048] 10-20 parts of ethylene-vinyl acetate copolymer resin;

[0049] 20-40 parts of diisononyl phthalate;

[0050] 15-30 parts of tetrahydrofuran;

[0051] 30-60 parts of filler;

[0052] 1-10 parts of diluent;

[0053] 2-5 parts of composite stabilizer;

[0054] 0.1-0.5 parts of dicumyl peroxide;

[0055] 0.05-0.15 parts of antioxidant;

[0056] Wherein, the original substrate layer 1 includes but is not limited to non-woven paper, base paper, and non-woven fabric.

[0057] The grades of polyvinyl chloride are P450 and / or EL-33. Preferably, the grades P450 and EL-33 are compounded in a mass ratio of 1:1. The resins of the above two grades are white powders, which can effectively reduce the change in the color of the primer layer.

[0058] The ethylene-vinyl acetate copolymer resin is selected from EVA 150 and EVA 40W from Mitsui & Co., Ltd. of Japan, or EVA V5110J and V4110F from BASF-YPC. Ethylene-vinyl acetate copolymer resins are obtained by copolymerizing crystalline ethylene monomers with non-crystalline vinyl acetate monomers. Varying the vinyl acetate content results in different macroscopic properties of the resin. Adding ethylene-vinyl acetate copolymer resin to polyvinyl chloride resin effectively improves the flexibility of the primer. The four selected ethylene-vinyl acetate copolymer resins with a vinyl acetate content of 20% or greater achieve better primer flexibility.

[0059] The diisononyl phthalate has good plasticizing properties, can reduce the van der Waals force between polyvinyl chloride molecules, and improve the migration of polyvinyl chloride molecular chains. By adding 20-40 parts of it to the primer slurry, the obtained primer is more flexible, and the specific properties of the primer such as the crease recovery angle and tensile load are significantly improved. However, the amount of plasticizer added should not be too large. In addition, the present technical solution further improves the plasticity and toughness of the primer by adding ethylene-vinyl acetate copolymer resin and blending it with polyvinyl chloride.

[0060] The key advantages of adding ethylene-vinyl acetate copolymer to polyvinyl chloride resin systems are as follows: First, it is non-volatile; second, it imparts elastomeric properties to the primer; and third, it reduces the amount of plasticizer used, resulting in improved durability. Furthermore, adding an appropriate amount of tetrahydrofuran can further dissolve the ethylene-vinyl acetate copolymer resin.

[0061] The filler is a mixture of rutile titanium dioxide, light calcium carbonate, and zinc oxide in a mass ratio of 1:8:(0.01-0.05), with the filler particle size ranging from 0.5-5 μm, and filler particles with a particle size of 0.5-2 μm accounting for 80-100%. Regarding the use of rutile titanium dioxide: Compared with anatase titanium dioxide, rutile titanium dioxide not only has significant UV shielding effects, but also absorbs UV light with a wavelength less than 410 nm and can reflect or refract most visible light, providing the greatest protection for polymers, helping to reduce color, while delaying yellowing and preventing physical property loss. It also has high hiding power, high weather resistance, and high gloss. Adding rutile titanium dioxide in the above proportion can save costs on the one hand, and improve the surface of the wall cloth substrate on the other hand, making the substrate brighter and masking the color of the substrate to achieve a softer white primer. In addition, the addition of rutile titanium dioxide reduces direct light exposure to the substrate, thereby reducing the yellowing of the substrate and extending the service life of the substrate.

[0062] The diluent is one of dodecylbenzene, No. 200 solvent gasoline or a mixture thereof; the diluent can be used to adjust the viscosity of the PVC paste so that the viscosity of the primer is appropriate, thereby meeting the required coating amount.

[0063] The composite stabilizer is a mixture of epoxy soybean oil and barium zinc stabilizer in a mass ratio of (1-2):1.5. Specifically, the epoxy soybean oil is branded KD-82 and is an environmentally friendly plant oil plasticizer and stabilizer. Epoxidized soybean oil has good compatibility with PVC resin, and the epoxy groups within the molecule act as a stabilizer when PVC decomposes to produce hydrogen chloride. Epoxidized soybean oil has low volatility and low migration. The addition of epoxy soybean oil can significantly improve the physical properties of the product and prolong the aging time. It also exhibits a good synergistic effect when used with stabilizers such as barium zinc salts. It reduces the generation of irritating gases and the use of heavy metal compounds during processing. It has excellent physical and chemical properties and good stability, and the formulated slurry is suitable for coating and sizing processes.

[0064] Adding a small amount of dicumyl peroxide can, on the one hand, make the system more compatible; on the other hand, it can make the cells of the ethylene-vinyl acetate copolymer resin more fine and uniform during the foaming process.

[0065] The antioxidant is a mixture of 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane and dilauryl thiodipropionate in a mass ratio of 2:1.

[0066] Preferably, 0.2-1 parts by weight of a mildew preventer is added to the primer to improve the mildew and antibacterial effects of the primer, thereby providing long-term use possibility for the subsequent use of the wallpaper substrate. Specifically, the mildew preventer selected for this primer is an isothiazolinone mildew preventer, specifically a compound composition of 1,2-benzisothiazolin-3-one and 2-methyl-4-isothiazolin-3-one in a mass ratio of 1:1, and the active ingredient of the mildew preventer is ≥5%.

[0067] Preferably, the primer also includes 1-4 parts by weight of an azodicarbonamide foaming agent. The azodicarbonamide foaming agent is a yellow powdered solid with low price, high gas emission, and a non-toxic, pollution-free foamed product. It is widely used, especially in the production of foamed wallpaper. To ensure the effectiveness and controllability of the substrate, this technical solution uses an azodicarbonamide foaming agent as a component of the primer for research. The azodicarbonamide foaming agent decomposes at around 200°C, which is higher than the softening temperature and decomposition temperature of polyvinyl chloride resin and ethylene-vinyl acetate copolymer resin. To promote the decomposition of the azodicarbonamide foaming agent during production, the processing temperature needs to be increased, causing the azodicarbonamide foaming agent to cause discoloration and aging of the product. In this technical solution, zinc oxide is used in the filler, which has high dispersibility and can reduce the decomposition temperature of the azodicarbonamide foaming agent to 130-170°C. In actual production, the foaming temperature can be lowered to reduce discoloration or aging caused by high temperatures. When the amount of zinc oxide is increased, the amount of gas generated by the azodicarbonamide foaming agent increases, and the density of the foamed pores increases. However, as the amount of zinc oxide continues to increase, more and more bubbles appear in the foaming system, and multiple small pores merge into large pores, which reduces the elasticity. By adding the amount of zinc oxide used in this technical solution, the primer surface obtained is soft and has moderate elasticity.

[0068] Preferably, the primer also includes a whitening agent, with the whitening agent added at a mass ratio of (0.0001-0.0005):1 to the primer. The whitening agent is 2,2-(4,4-diphenylethylene)bisbenzoxazole. The whitening agent absorbs invisible ultraviolet light and converts it into longer-wavelength blue or violet visible light. The reflected visible light typically has a wavelength between 400-600 nm, compensating for the inevitable yellowish tint in the raw materials. For example, the azodicarbonamide foaming agent converts the blue or violet visible light into a mixture with the yellowish light reflected by the yellowish raw materials to form a white light that is pleasing to the human eye. This makes the substrate layer appear whiter, brighter, and more vibrant. As the amount of whitening agent increases, the whiteness of the primer increases accordingly. However, if too much whitening agent is added, such as when the whitening agent addition mass ratio to the primer is 0.0006:1, the resulting wallpaper substrate's fading resistance deteriorates, with the difference being as much as two levels.

[0069] The present invention also provides a method for producing a wallpaper substrate, specifically:

[0070] The production method comprises the following steps:

[0071] S1. Prepare ordinary wallpaper substrate;

[0072] S2. Prepare primer:

[0073] (S21): adding ethylene-vinyl acetate copolymer resin into tetrahydrofuran to dissolve it, and after the dissolution is complete, obtaining a polymer elastomer for standby use;

[0074] (S22): weighing the raw materials of the components except the ethylene-vinyl acetate copolymer resin, tetrahydrofuran and polyvinyl chloride, adding them to a stirring kettle, stirring at room temperature for 30-60 minutes, then adding the polymer elastomer obtained in (S21), and continuing to stir evenly to obtain a premix;

[0075] (S23): adding polyvinyl chloride to the premix obtained in S2 and stirring for 20-30 minutes to obtain a paste resin;

[0076] (S24): Printing / scalpel coating / spraying the paste obtained in S2 on the surface of the substrate, drying at 140-200° C. for 0.5-5 min, and drying and forming the paste resin to obtain the wallpaper substrate;

[0077] S3, apply the primer at a rate of 20-150g / m 2 The paper is dried on a normal wallpaper substrate.

[0078] Preferably, the wallpaper substrate production method further includes foaming the wallpaper substrate obtained in (S24) at 150-180°C, and then embossing it while hot to obtain a wallpaper substrate with a textured effect. Preferably, the primer can be applied by gravure printing in printing. Under the above-mentioned coating amount, gravure printing is used, which is less likely to cause missing prints, and the primer adheres more evenly, so that the overall surface of the obtained substrate is smooth.

[0079] The production method of the substrate is simple, the apparent color of the obtained wallpaper substrate is controllable, and the obtained coating has good surface effect, flexibility and light resistance.

[0080] The sources of the raw materials used in the examples of this application are as follows:

[0081] The following is an example of specific components:

[0082] Polyvinyl chloride resin: P450 and EL-33, sourced from Shanghai Shenshen Industrial Co., Ltd. and Japan Kanebuchi Corporation, respectively, mixed in a mass ratio of 1:1;

[0083] Ethylene-vinyl acetate copolymer resin: brand 40W, vinyl acetate content is 40%, sourced from Mitsui Co., Ltd. of Japan;

[0084] Diisononyl phthalate: from Zhuhai Liancheng Chemical Industry Co., Ltd.

[0085] Tetrahydrofuran: from Ningxia Meibang Huanyu Chemical Co., Ltd.

[0086] Filler 1: rutile titanium dioxide, brand TiO2-R-03, from Zhejiang Yamei Nanotechnology Co., Ltd.

[0087] Filler 2: anatase titanium dioxide, brand TiO2-0005, from Zhejiang Yamei Nanotechnology Co., Ltd.

[0088] Filler 3: Light calcium carbonate, sourced from Jingxian Weida New Materials Co., Ltd.

[0089] Filler 4: zinc oxide, sourced from Hebei Tengge Chemical Technology Co., Ltd.

[0090] Diluent: No. 200 solvent gasoline; sourced from Hubei Chengfeng Chemical Co., Ltd.

[0091] Antioxidant: 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane and dilauryl thiodipropionate mixed in a mass ratio of 2:1, commercially available;

[0092] Antifungal agent: ACTICIDE MBS antifungal agent is used, which is sourced from Thor Specialty Chemicals (Zhenjiang) Co., Ltd.

[0093] Azodicarbonamide foaming agent: brand AC-9000, sourced from Guangzhou Kemani New Material Technology Co., Ltd.

[0094] Brightener: 2,2-(4,4-diphenylethylene)bisbenzoxazole, sourced from Hebei Bangti Chemical Co., Ltd.

[0095] The following are specific embodiments:

[0096] Example 1

[0097] This embodiment provides a wallpaper substrate, the production method of which includes the following steps:

[0098] S1. Prepare ordinary wallpaper substrate. In this embodiment, the original substrate is non-woven paper;

[0099] S2. Prepare primer:

[0100] (S21): adding ethylene-vinyl acetate copolymer resin into tetrahydrofuran to dissolve it, and after the dissolution is complete, obtaining a polymer elastomer for standby use;

[0101] (S22): weighing the raw materials of the components other than the ethylene-vinyl acetate copolymer resin, tetrahydrofuran, and polyvinyl chloride (diisononyl phthalate; filler; diluent; composite stabilizer; dicumyl peroxide; antioxidant; mildew inhibitor; azodicarbonamide foaming agent; whitening agent), adding them to a stirring vessel, stirring at room temperature for 40 minutes, and then adding the polymer elastomer obtained in (S21), continuing to stir evenly, to obtain a premix;

[0102] (S23): adding polyvinyl chloride to the premix obtained in (S22), stirring for 25 minutes to obtain a paste resin;

[0103] S3, the paste resin prepared in (S23) is pressurized to 60g / m 2 The surface of an ordinary wallpaper substrate is gravure printed and dried at 160° C. for 3 minutes, and the paste resin is dried and formed to obtain the wallpaper substrate. In some embodiments, the dried wallpaper substrate is foamed at 160° C. and then embossed while hot to obtain a wallpaper base material with a textured effect.

[0104] Examples 2-8 adopt the same production method as Example 1, and produce wallpaper base materials according to the raw material ratios described in Table 1 below.

[0105] Table 1 Components (parts by weight) and proportions of primers in each embodiment

[0106] Comparative Examples 1-6

[0107] The same production method as in Example 1 was adopted, and wallpaper substrates were produced according to the raw material ratios described in Table 2 below.

[0108] Table 2 Components (parts by weight) and proportions of primers in comparative examples

[0109] The primers prepared in the above examples and comparative examples were applied in an amount of 60 g / m 2 The corresponding flexible wallpaper substrate was obtained by brushing on the surface of non-woven paper, and the tactile feel, crease recovery angle, tensile load, mildew resistance, antibacterial property, whiteness and fading resistance were tested respectively.

[0110] The specific test methods / standards are as follows:

[0111] 1. Touch: measured by finger touch;

[0112] 2. Crease recovery angle: Crease recovery angle test: The test shall be carried out in accordance with the method specified in GB / T 3819-1997 "Determination of crease recovery of textile fabrics - Recovery angle method".

[0113] 3. Tensile load: tested using a universal tensile testing machine;

[0114] 4. Anti-mildew performance: measured according to GB / T 34844 method;

[0115] 5. Antibacterial properties: measured according to JIS Z 2801 method;

[0116] 6. CIE whiteness: Tested according to GB / T 22879 method;

[0117] 7. Fading resistance: Mainly measured according to QB / T 4034 method, with the test time changed to 200h.

[0118] The test results are shown in Table 3

[0119] Table 3 Performance test table of wallpaper substrates prepared in Examples and Comparative Examples

[0120] The materials used in the examples of the present application and the comparative examples are different as follows:

[0121] First, the comparative example uses non-woven paper as an ordinary wallpaper substrate.

[0122] Second, the brand of polyvinyl chloride in this application is P450 and / or EL-33; the brand of ethylene-vinyl acetate copolymer resin is one or more of EVA 150, EVA 40W, EVA V5110J, and V4110F; the filler is a mixture of rutile titanium dioxide, light calcium carbonate, and zinc oxide in a mass ratio of 1:8:(0.01-0.05); the diluent is one of dodecylbenzene and No. 200 solvent gasoline, or a mixture thereof; the composite stabilizer is a mixture of epoxidized soybean oil and barium zinc stabilizer in a mass ratio of (1-2):1.5; the antioxidant is a mixture of 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane and dilauryl thiodipropionate in a mass ratio of 2:1; the mildew inhibitor is a whitening agent of 2,2-(4,4-distyryl)bisbenzoxazole. There is no limit on diisononyl phthalate, tetrahydrofuran, azodicarbonamide, and dicumyl peroxide foaming agents. The above raw materials can reduce the surface differences between substrates, and the obtained wallpaper substrate has good flexibility.

[0123] Specifically, according to the test structure, the primers in Examples 1 and 2 adopt a compound of ethylene-vinyl acetate copolymer resin and polyvinyl chloride resin, and compared with the pure polyvinyl chloride resin in Comparative Example 1 (traditional), as shown in Figure 1, the wallpaper substrate prepared by using the primer of this embodiment has a slightly elastic feel, a large crease recovery angle, and a large tensile load, indicating that the primer of the present application has better flexibility; in addition, the fading effect is good.

[0124] In Examples 2 and 3, as well as Examples 4 and 5, and Examples 6 and 7, the mildew inhibitor of the present invention is added, and in combination with the addition of azodicarbonamide foaming agent and brightener, and in combination with the production process, good mildew and antibacterial activity can be maintained at a temperature of 160° C. for at least 3 minutes, and the fading effect is good.

[0125] According to Example 6, Example 7, Example 8 and Comparative Example 6, adding a large amount of whitening agent can effectively enhance the whiteness of the wallpaper substrate. However, at this ratio, if the amount added is too much, the fading effect of the obtained wallpaper substrate will decrease.

[0126] The flexible wallpaper substrate provided in this application has excellent performance and can be used in the production of different wallpapers, such as:

[0127] 1. The flexible wallpaper substrate produced in this application is applied to mildew-proof wallpaper, and 20-60g / m 2 Patterns are printed on a flexible wallpaper substrate with an anti-mildew primer to obtain anti-mildew wallpaper.

[0128] 2. The flexible wallpaper substrate produced in this application is applied to high white mildew proof wallpaper, and 20-80g / m 2 Patterns are printed on a flexible wallpaper substrate with a high-white mildew-proof primer to obtain high-white mildew-proof wallpaper.

[0129] 3. The flexible wallpaper substrate produced in this application is applied to wallpaper with three-dimensional effect, and the wallpaper is coated with 60-150g / m 2 Apply ordinary paint / color painting on the flexible wallpaper substrate that has been primed, foamed at high temperature and embossed to obtain wallpaper with a three-dimensional effect.

[0130] In summary, the first aspect of the present invention provides a wallpaper substrate, which has good flexibility and light resistance, and the surface color of the wallpaper substrate is controllable. The wallpaper substrate can be put into use directly, which is convenient for small wallpaper production enterprises to use and achieve the goal of efficient wallpaper production.

[0131] The second aspect provides a wallpaper substrate production method, through which wallpaper substrates with different flexibility effects can be produced under the original wallpaper production conditions.

[0132] The third aspect provides an application method of wallpaper substrates, and provides application solutions of wallpaper substrates on mildew-proof wallpapers, mildew-proof wallpapers with higher vividness, and painted wallpapers / painted wallpapers with three-dimensional effects.

[0133] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A flexible wallpaper substrate, comprising an original substrate layer and a primer layer entirely disposed on the original substrate layer, wherein the coating amount of the primer layer is 20-150 g / m 2 , and the primer layer comprises the following components in parts by mass: 30 - 60 parts of polyvinyl chloride resin; 10 - 20 parts of ethylene - vinyl acetate copolymer resin; 20 - 40 parts of diisononyl phthalate; 15 - 30 parts of tetrahydrofuran; 30 - 60 parts of filler; 1 - 10 parts of diluent; 2 - 5 parts of composite stabilizer; 0.1 - 0.5 part of dicumyl peroxide; 0.05 - 0.15 part of antioxidant; Among them, The composite stabilizer is composed of epoxy soybean oil and barium - zinc stabilizer mixed in a mass ratio of (1 - 2):1.5; Among them, the filler is composed of rutile titanium dioxide, light calcium carbonate and zinc oxide mixed in a mass ratio of 1:8:(0.01 - 0.05). The particle size of the filler is 0.5 - 5 μm, and the filler particles with a particle size range of 0.5 - 2 μm account for 80 - 100%; Among them, the diluent is dodecylbenzene and / or 200 - number solvent gasoline; Among them, the antioxidant is composed of 1,1,3 - tris(2 - methyl - 4 - hydroxy - 5 - tert - butylphenyl)butane and dilauryl thiodipropionate compounded in a mass ratio of 2:

1.

2. The flexible wallpaper substrate according to claim 1, wherein: The primer layer further includes a mildew - proof agent, and the addition amount of the mildew - proof agent is 0.2 - 1 part; and the effective ingredient of the mildew - proof agent ≥ 5%.

3. The flexible wallpaper substrate according to claim 2, characterized in that: The mildew - proof agent is an isothiazolinone - type mildew - proof agent, and this isothiazolinone - type mildew - proof agent is composed of 1,2 - benzisothiazolin - 3 - one and 2 - methyl - 4 - isothiazolin - 3 - one compounded in a mass ratio of 1:

1.

4. A flexible wallpaper substrate according to claim 1, characterized in that: The primer layer further includes azodicarbonamide foaming agent, and the addition amount of the azodicarbonamide foaming agent is 1 - 4 parts.

5. The flexible wallpaper substrate according to claim 3, characterized in that: The primer layer further includes a whitening agent, and the addition amount of the whitening agent and the mass ratio of the primer is (0.0001 - 0.0005):

1.

6. A production method of a flexible wallpaper base material, comprising the following steps: S1. Prepare a common wallpaper base material; S2. Configure the primer: (S21): Add ethylene - vinyl acetate copolymer resin into tetrahydrofuran for dissolution. After dissolution, a high - molecular elastomer is obtained for standby; (S22): Weigh the raw materials of the above - mentioned components except ethylene - vinyl acetate copolymer resin, tetrahydrofuran and polyvinyl chloride, and add them into a stirring kettle. Stir at room temperature for 30 - 60 min, and then add the high - molecular elastomer obtained in (S21), and continue to stir evenly to obtain a premix; (S23): Add polyvinyl chloride into the premix obtained in (S22), and stir for 20 - 30 min to obtain a paste resin; S3. Apply the paste resin prepared in (S23) at 20 - 150 g / m 2 onto the surface of the substrate by printing, scraping, or spraying, and dry it at 140 - 200 °C for 0.5 - 5 min. The paste resin dries and forms to obtain the wallpaper substrate.

7. A production method of a flexible wallpaper substrate according to claim 5, characterized in that: The method further includes foaming the wallpaper base material obtained in (S3) at 150 - 180 °C, and then hot - embossing to obtain a wallpaper base material with a texture effect.

8. Application of a flexible wallpaper substrate produced by the production method of the flexible wallpaper substrate described in claim 6 or 7 in a mildew-proof wallpaper, characterized in that: Print a pattern on a flexible wallpaper substrate coated with 20 - 60 g / m 2 mildew-proof primer to obtain a mildew-proof wallpaper.

9. Application of a flexible wallpaper substrate produced by the production method of the flexible wallpaper substrate described in claim 6 or 7 in a high-white mold-proof wallpaper, characterized in that: Print a pattern on a flexible wallpaper substrate coated with 20 - 80 g / m 2 high - white mildew - proof primer to obtain a high - white mildew - proof wallpaper.

10. Application of a flexible wallpaper substrate produced by the production method of the flexible wallpaper substrate described in claim 6 or 7 in a wallpaper with a three-dimensional effect, characterized in that: On a flexible wallpaper substrate coated with 60 - 150 g / m 2 primer and subjected to high-temperature foaming and embossing, ordinary paint / painting is applied to obtain a wallpaper with a three-dimensional effect.

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