A flexible wallpaper substrate, production method and application

Abstract

The present invention discloses a flexible wallpaper substrate, a production method and an application, relating to the technical field of wall coverings. A flexible wallpaper substrate includes an original substrate layer and a primer layer provided entirely on the original substrate layer. The coating amount of the primer layer is 20 - 150 g / m<supgt;2< / supgt>. The primer layer includes 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 parts of dicumyl peroxide; 0.05 - 0.15 parts of antioxidant. The wallpaper substrate has good flexibility and light resistance, and the apparent color of the prepared wallpaper substrate is controllable, which is easy to produce and convenient to apply.

Description

Technical Field

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

[0002] Wallpaper, also known as wall covering, is an interior decoration material used for wall papering. It is widely used in the interior decoration of residences, offices, hotels, and guesthouses. Because of its diverse colors, rich patterns, luxurious style, and convenient construction, it is unparalleled by other interior decoration materials. The substrate of wallpaper is not limited to paper, but also includes other materials, which is the main reason for the variety of wallpaper types.

[0003] Among the types of wallpaper, non-woven wallpaper is a relatively traditional and simple type of wallpaper. In production, non-woven paper is generally used as the substrate, and a simple non-woven wallpaper can be obtained by printing patterns on the surface. Generally, the patterns of non-woven wallpaper are set with the substrate as the background. At this time, there is a requirement for the color of the non-woven paper. At present, due to differences in batches or manufacturers, the surfaces of non-woven papers are different, and obvious color differences often occur in the finished wallpaper products. To prevent obvious color differences from occurring, in a production process, manufacturers generally print an additional layer of white slurry, dry the slurry, and then print the patterns. However, for small or micro wallpaper companies that pursue quality, an additional layer needs to be printed, which requires two additional processes, and correspondingly, an additional printing station and an additional long oven are needed, which is not effective due to site and scale limitations. Or the method of printing in batches can be adopted. This method requires additional workload for machine debugging and occupies the production of other finished wallpaper products, which instead reduces production efficiency. Developing a convenient wallpaper substrate that is easy for small wallpaper enterprises to use is of great significance. Summary of the Invention

[0004] To solve the above problems, the present invention provides a flexible wallpaper substrate, a production method and an application thereof. The wallpaper substrate has good flexibility and light resistance, and the apparent color of the obtained wallpaper substrate is controllable, easy to produce and convenient to apply.

[0005] To achieve the above object, the technical solution adopted by the present invention is to provide a flexible wallpaper substrate, which includes an original substrate layer and a primer layer provided entirely on the original substrate layer. The coating amount of the primer layer is 20-150 g / m², and 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 part of dicumyl peroxide;

[0014] 0.05 - 0.15 part of antioxidant;

[0015] 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;

[0016] Among them, the filler is composed of rutile - type 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 of 0.5 - 2 μm account for 80 - 100%;

[0017] Among them, the diluent is one or a mixture of dodecylbenzene and No. 200 solvent gasoline;

[0018] 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.

[0019] Furthermore: 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%.

[0020] Furthermore: The mildew - proof agent is an isothiazolinone - type mildew - proof agent, specifically composed of 1,2 - benzisothiazolin - 3 - one and 2 - methyl - 4 - isothiazolin - 3 - one compounded in a mass ratio of 1:1.

[0021] Furthermore: The primer layer further includes azodicarbonamide foaming agent, and the addition amount of the azodicarbonamide foaming agent is 1 - 4 parts.

[0022] Furthermore: 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.

[0023] Furthermore: A production method of a flexible wallpaper substrate includes the following steps:

[0024] S1. Prepare a common wallpaper substrate;

[0025] S2. Configure the primer:

[0026] (S21): Add ethylene-vinyl acetate copolymer resin to tetrahydrofuran for dissolution. After dissolution, a high molecular elastomer is obtained for later use.

[0027] (S22): Weigh the raw materials of the components other than ethylene-vinyl acetate copolymer resin, tetrahydrofuran and polyvinyl chloride, add them to a stirring kettle, stir at room temperature for 30 - 60 min, then add the high molecular elastomer obtained in (S21), and continue to stir evenly to obtain a premix.

[0028] (S23): Add polyvinyl chloride to the premix obtained in (S22), stir for 20 - 30 min to obtain a paste resin.

[0029] S3: Print / scrape / spray the paste resin prepared in (S23) on the surface of the substrate at 20 - 150 g / m², and dry it at 140 - 200 °C for 0.5 - 5 min. The paste resin dries and forms to obtain the wallpaper substrate.

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

[0031] Further: An application of the flexible wallpaper substrate in a mildew-proof wallpaper. Print a pattern on the flexible wallpaper substrate coated with 20 - 60 g / m² of mildew-proof primer to obtain a mildew-proof wallpaper.

[0032] Further: An application of the flexible wallpaper substrate in a high-white mildew-proof wallpaper. Print a pattern on the flexible wallpaper substrate coated with 20 - 80 g / m² of high-white mildew-proof primer to obtain a high-white mildew-proof wallpaper.

[0033] Further: An application of the flexible wallpaper substrate in a wallpaper with a three-dimensional effect. Apply ordinary paint / painting on the flexible wallpaper substrate coated with 60 - 150 g / m² of primer and subjected to high-temperature foaming and embossing to obtain a wallpaper with a three-dimensional effect.

[0034] Advantages of the present invention:

[0035] The present invention provides a flexible wallpaper substrate. By coating a primer on the original substrate, the following effects can be obtained:

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

[0037] 2. Protect the surface of the original substrate. During actual use, when the original substrate is exposed to light, the chemical fibers in the paper or cloth will age. However, through the primer setting of this solution, the primer has good weather resistance. Setting the primer on the surface of the original substrate can achieve a good sunlight isolation effect, making the treated wallpaper substrate not prone to yellowing. In addition, using this wallpaper substrate as the background to produce the finished wallpaper can maintain a good pattern presentation effect.

[0038] 3. The obtained wallpaper substrate can be directly applied. Especially for small and micro wallpaper production enterprises, it can be directly used for the production of wallpaper, which is very convenient. Description of the Drawings

[0039] Figure 1 It is a schematic structural diagram of a flexible wallpaper substrate;

[0040] Figure 2 It is a schematic structural diagram of another flexible wallpaper substrate;

[0041] Figure 3 It is an effect diagram of the original substrate layer aging and turning yellow under sunlight exposure (left) and the substrate being white without sunlight exposure (right);

[0042] Figure 4 It is an effect diagram of the ordinary polyvinyl chloride substrate in Comparative Example 2 showing a yellowish and dull appearance (left) and the high-white foamed substrate in Example 2-5 of this technical solution showing a white appearance (right).

[0043] Explanation of the reference numerals in the drawings: 1. Original substrate layer; 2. Primer layer. Detailed Embodiments

[0044] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] Since there are certain differences in the surface properties of the same / different wallpaper original substrates on the market, directly using them is likely to cause problems such as obvious color differences, poor effect presentation, and increased process steps. To reduce the aforementioned problems, the present invention provides a wallpaper substrate. By coating a primer on the original substrate, the following effects can be obtained: 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, protect the surface of the original substrate because during actual use, when the original substrate is exposed to light, the chemical fibers in the paper or cloth will age, such as Figure 3As shown on the left in the figure; then through the primer setting of this solution, the primer has good weather resistance. Setting the primer on the surface of the original substrate can achieve a good sunlight isolation effect, making the treated wallpaper substrate not easy to turn yellow. In addition, using this wallpaper substrate as the background to produce the finished wallpaper can maintain a good pattern presentation effect; third, the produced wallpaper substrate can be directly applied, especially for small and micro wallpaper production enterprises, it can be directly used for the production of wallpaper, which is very convenient.

[0046] The present invention provides a wallpaper substrate, as shown in Figure 1-2 , including an original substrate layer 1 and a primer layer 2 provided entirely on the original substrate layer 1. The coating amount of the primer layer 2 is 20 - 150 g / m², and the primer layer 2 includes the following components in parts by mass:

[0047] Polyvinyl chloride resin 30 - 60 parts;

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

[0049] Diisononyl phthalate 20 - 40 parts;

[0050] Tetrahydrofuran 15 - 30 parts;

[0051] Filler 30 - 60 parts;

[0052] Diluent 1 - 10 parts;

[0053] Compound stabilizer 2 - 5 parts;

[0054] Dicumyl peroxide 0.1 - 0.5 parts;

[0055] Antioxidant 0.05 - 0.15 parts;

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

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

[0058] The ethylene-vinyl acetate copolymer resin is selected from EVA 150, EVA 40W of Mitsui Chemicals, Inc. of Japan or EVA V5110J, V4110F of Yangzi BASF Co., Ltd. The ethylene-vinyl acetate copolymer resin is obtained by copolymerizing the crystalline ethylene monomer and the non-crystalline vinyl acetate monomer. The change in the content of vinyl acetate will result in different macroscopic properties of the resin. By adding the ethylene-vinyl acetate copolymer resin to the polyvinyl chloride resin, the flexibility of the primer can be effectively improved. The vinyl acetate content of the four selected grades of ethylene-vinyl acetate copolymer resin ≥20% is better for achieving the flexible effect of the primer.

[0059] The use of 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 to the primer slurry, the resulting primer is more flexible, and the properties such as the crease recovery angle and tensile load of the primer are significantly improved. However, the addition amount of the plasticizer should not be too large; in addition, in this technical solution, the addition of the ethylene-vinyl acetate copolymer resin and the blending with polyvinyl chloride further improve the plasticity and toughness of the primer.

[0060] The greatest advantages of adding the ethylene-vinyl acetate copolymer to the polyvinyl chloride resin system are as follows: First, it is non-volatile; second, it endows the primer with some elastomeric properties; third, it can also reduce the dosage of the plasticizer and has better durability. In addition, adding an appropriate amount of tetrahydrofuran can better dissolve the ethylene-vinyl acetate copolymer resin.

[0061] The filler is a mixed composition obtained from 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%. Regarding the rutile titanium dioxide: Compared with anatase titanium dioxide, rutile titanium dioxide not only has a significant ultraviolet shielding effect, can absorb ultraviolet light with a wavelength less than 410 nm, can reflect or refract most visible light, has the greatest protective effect on polymers, helps to reduce color, and at the same time delays yellowing and blocks the loss of physical properties, but also has characteristics such as high hiding power, high weather resistance, and high gloss. Adding rutile titanium dioxide in the above proportion can, on the one hand, save costs, and on the other hand, improve the surface of the wall covering substrate, make the substrate brighter, cover the color of the substrate, so as to achieve a primer with a softer white color. In addition, the addition of rutile titanium dioxide reduces the direct irradiation of light on the substrate, thereby reducing the yellowing of the substrate and extending the service life of the substrate.

[0062] The diluent is one or a mixture of dodecylbenzene and No. 200 solvent gasoline; the diluent can be used to adjust the viscosity of the PVC paste, making the viscosity of the primer suitable, so as to meet the required coating amount.

[0063] The composite stabilizer is composed of epoxidized soybean oil and barium-zinc stabilizer mixed in a mass ratio of (1 - 2):1.5. Specifically, the epoxidized soybean oil has the brand KD-82, which is an environmentally friendly vegetable oil plasticizer and stabilizer. Epoxidized soybean oil has good compatibility with PVC resin. The epoxy groups in the molecule play a stabilizing role when PVC decomposes to produce hydrogen chloride. Epoxidized soybean oil has low volatility and small migration, and adding epoxidized soybean oil can significantly improve the physical properties of the product and extend the aging time. It has good synergistic effects when used with metal salt stabilizers such as barium and zinc. It reduces the generation of irritating gases and the use of heavy metal compounds during the processing. It has good physical and chemical properties and good stability, and the prepared slurry is suitable for the coating and sizing process.

[0064] Adding a small amount of diisopropylbenzene peroxide makes the compatibility of the system higher on the one hand; on the other hand, it can make the cell pores in the foaming process of ethylene-vinyl acetate copolymer resin more fine and uniform.

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

[0066] Preferably, 0.2 - 1 part by mass of a mildew-proof agent is added to the primer to improve the mildew-proof and antibacterial effects of the primer, providing long-term use possibilities for the subsequent use of the wallpaper substrate. Specifically, the mildew-proof agent selected for this primer is an isothiazolinone-based mildew-proof agent, specifically composed 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-proof agent is ≥5%.

[0067] Preferably, the primer further includes 1-4 parts by mass of azodicarbonamide foaming agent. Among them, azodicarbonamide foaming agent is a yellow powdery solid, which has a low price, a large gas generation volume, and the foamed product is non-toxic and pollution-free, and is widely used. It is widely used in the production of foamed wallpaper. In order to ensure the effect and controllability of the base material, this technical solution uses azodicarbonamide foaming agent as a component of the primer for research. Azodicarbonamide foaming agent decomposes at about 200°C, which is higher than the softening temperature and decomposition temperature of polyvinyl chloride resin and ethylene-vinyl acetate copolymer resin. In production, in order to promote the decomposition of azodicarbonamide foaming agent, it is necessary to increase the processing temperature, which will cause the product to discolor and age due to azodicarbonamide foaming agent; in this technical solution, zinc oxide is used in the filler, which has high dispersibility and can reduce the decomposition temperature of azodicarbonamide foaming agent to 130-170°C. In actual production, the foaming temperature can be reduced to reduce the discoloration or aging caused by high temperature. When the amount of zinc oxide is increased, the amount of gas generated by azodicarbonamide foaming agent increases, and the pore density of the foam is large. However, as the amount of zinc oxide continues to increase, there are more and more bubbles in the foaming system, and multiple small holes merge into large holes, resulting in a decrease in elasticity. By adding zinc oxide in the amount used in this technical solution, the surface of the obtained primer is soft and has moderate elasticity.

[0068] Preferably, the primer further includes a whitening agent, and the mass ratio of the addition amount of the whitening agent to the primer is (0.0001-0.0005):1. Among them, the whitening agent is 2,2-(4,4-distyryl)bisbenzoxazole; the whitening agent can absorb invisible ultraviolet light and be converted into visible light with a longer wavelength of blue or purple. The reflected visible light usually has a wavelength between 400-600nm, which can compensate for the inevitable slight yellow color in the raw materials, such as azodicarbonamide foaming agent, that is, the blue or purple visible light converted by the whitening agent is mixed with the slight yellow light reflected by the slightly yellow raw materials to form white light favored by the human eye; thus making the substrate layer appear whiter, brighter and more vivid. As the amount of the whitening agent increases, the whiteness of the primer increases accordingly. However, when too much whitening agent is added, such as when the mass ratio of the addition amount of the whitening agent to the primer is 0.0006:1, the fading resistance of the prepared wallpaper substrate becomes correspondingly worse, and the difference can reach 2 grades.

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

[0070] The production method includes the following steps:

[0071] S1. Prepare a common wallpaper substrate;

[0072] S2. Configure the primer:

[0073] (S21): Add ethylene-vinyl acetate copolymer resin to tetrahydrofuran for dissolution. After dissolution, a high molecular elastomer is obtained for later use.

[0074] (S22): Weigh the raw materials of the components other than ethylene-vinyl acetate copolymer resin, tetrahydrofuran and polyvinyl chloride, and add them to a stirring kettle. Stir at room temperature for 30 - 60 min, then add the high molecular elastomer obtained in (S21), and continue to stir evenly to obtain a premix.

[0075] (S23): Add polyvinyl chloride to the premix obtained in S2, and stir for 20 - 30 min to obtain a paste resin.

[0076] (S24): Print / coat by scraping / spray the product obtained in S2 on the surface of the substrate, and dry at 140 - 200 °C for 0.5 - 5 min. The paste resin dries and forms to obtain the wallpaper substrate.

[0077] S3. The primer is applied to the ordinary wallpaper substrate at a coating amount of 20 - 150 g / m² and dried.

[0078] Preferably, the production method of the wallpaper substrate further includes foaming the wallpaper substrate obtained in (S24) at 150 - 180 °C, and then hot embossing while it is hot to obtain a wallpaper base material with a texture effect. Preferably, intaglio printing in printing can be used for the coating of the primer. At the above coating amount, when using intaglio printing, it is not easy to produce missing printing, and the primer adheres more evenly, and the overall surface flatness of the obtained substrate is good.

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

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

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

[0082] Polyvinyl chloride resin: The grades are P450 and EL-33, which are respectively from Shanghai Shenhua Industry Co., Ltd. and Nippon Zeon Co., Ltd. in Japan, and are mixed in a mass ratio of 1:1.

[0083] Ethylene-vinyl acetate copolymer resin: The grade is 40W, the vinyl acetate content is 40%, and it is from Mitsui & Co., Ltd. in Japan.

[0084] Diisononyl phthalate: From Zhuhai United Chemical Industry Co., Ltd.

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

[0086] Filler 1: Rutile titanium dioxide, grade TiO2-R-03, sourced from Zhejiang Asia-America Nano-Tech Co., Ltd.;

[0087] Filler 2: Anatase titanium dioxide, grade TiO2-0005, sourced from Zhejiang Asia-America Nano-Tech 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: Solvent naphtha No. 200; sourced from Hubei Chengfeng Chemical Co., Ltd.;

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

[0092] Mildew-proof agent: ACTICIDE MBS mildew-proof agent, sourced from Thor Specialties (Zhenjiang) Co., Ltd.;

[0093] Azodicarbonamide blowing agent: Grade AC-9000, sourced from Guangzhou Kemanian New Materials Technology Co., Ltd.;

[0094] Whitening agent: 2,2-(4,4-distyryl)bisbenzoxazole, sourced from Hebei Bangtai Chemical Co., Ltd.

[0095] The following are specific examples:

[0096] Example 1

[0097] This example provides a wallpaper substrate, and its production method includes the following steps:

[0098] S1. Prepare a common wallpaper substrate. In this example, the original substrate uses non-woven paper;

[0099] S2. Configure the primer:

[0100] (S21): Add ethylene-vinyl acetate copolymer resin to tetrahydrofuran for dissolution. After dissolution, a high molecular elastomer is obtained for later use;

[0101] (S22): Weigh the raw materials of the above components except ethylene-vinyl acetate copolymer resin, tetrahydrofuran, and polyvinyl chloride (diisononyl phthalate; filler; diluent; composite stabilizer; dicumyl peroxide; antioxidant; mildew-proof agent; azodicarbonamide blowing agent; whitening agent), and add them to a stirring kettle. Stir at room temperature for 40 min, then add the high molecular elastomer obtained in (S21), and continue to stir evenly to obtain a premix;

[0102] (S23): Add polyvinyl chloride to the premix obtained in (S22), and stir for 25 min to obtain paste resin.

[0103] S3: Apply the paste resin prepared in (S23) to the surface of a common wallpaper substrate at 60 g / m² by gravure printing, and dry it at 160 °C for 3 min. 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 it is hot to obtain a wallpaper substrate with a texture effect.

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

[0105] Table 1 Components (parts by weight) and ratios of the primer in each example

[0106]

[0107] Comparative Examples 1-6

[0108] Adopt the same production method as Example 1, and wallpaper substrates are respectively produced according to the raw material ratios described in Table 2 below.

[0109] Table 2 Components (parts by weight) and ratios of the primer in the comparative examples

[0110]

[0111] Apply the primers prepared in the above examples and comparative examples to the surface of non-woven paper at a brushing amount of 60 g / m² to obtain corresponding flexible wallpaper substrates, and conduct tests on hand touch feeling, crease recovery angle, tensile load, mildew resistance, antibacterial property, whiteness, and color fastness respectively.

[0112] The specific test methods / standards are as follows:

[0113] 1. Hand touch feeling: Measured by finger touch.

[0114] 2. Crease recovery angle: Crease recovery angle test: Conduct the test according to the method specified in GB / T 3819-1997 Determination of Crease Recovery of Textiles - Recovery Angle Method.

[0115] 3. Tensile load: Tested with a universal tensile machine.

[0116] 4. Mildew resistance: Determined according to the method of GB / T 34844.

[0117] 5. Antibacterial property: Determined according to the method of JIS Z 2801.

[0118] 6. CIE Whiteness: Tested according to the method of GB / T 22879;

[0119] 7. Fading Resistance: Mainly determined according to the method of QB / T 4034, and the test time is changed to 200h.

[0120] The test results are shown in Table 3

[0121] Table 3 Performance Test Table of Wallpaper Substrates Prepared in Examples and Comparative Examples

[0122]

[0123] Since there are the following differences between the materials used in the examples and comparative examples of this application:

[0124] First, the comparative example uses non-woven paper as a common wallpaper substrate.

[0125] Second, in this application, the grades of polyvinyl chloride are P450 and / or EL-33; the grades of ethylene-vinyl acetate copolymer resin are one or more of EVA 150, EVA 40W, EVA V5110J, and V4110F; the filler is a mixed composition obtained from rutile titanium dioxide, light calcium carbonate, and zinc oxide in a mass ratio of 1:8:(0.01 - 0.05); the diluent is one or a mixture of dodecylbenzene and 200# solvent gasoline; the composite stabilizer is a mixture of epoxy 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-proof agent; the brightening agent is 2,2-(4,4-distyryl)bisbenzoxazole. And there are no restrictions on diisononyl phthalate, tetrahydrofuran, azodicarbonamide, and dicumyl peroxide blowing agent. The above raw materials can all reduce the realization of surface differences between substrates and obtain the effect that the obtained wallpaper substrate has good flexibility.

[0126] Specifically, according to the test results, the primers in Example 1 and Example 2 adopt the compounding of ethylene-vinyl acetate copolymer resin and polyvinyl chloride resin, compared with the pure polyvinyl chloride resin in Comparative Example 1 (traditional), see Figure 1 , the wallpaper substrate prepared with the primer of this example has a slightly elastic hand feel, a large crease recovery angle, and a large tensile load, indicating that the primer of this application has better flexibility; in addition, the fading resistance effect is good.

[0127] In Example 2 and Example 3, as well as Example 4 and Example 5, and Example 6 and Example 7, by adding the mildew-proof agent described in the present invention, and adding azodicarbonamide blowing agent and whitening agent, and combining with the production process: at a temperature of 160 °C for at least 3 minutes, good mildew-proof and antibacterial activity can still be maintained, and the fading effect is good.

[0128] 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 addition amount is too much, the fading effect of the obtained wallpaper substrate will decline.

[0129] The flexible wallpaper substrate provided by this application has excellent performance and can be applied in different wallpaper productions, such as:

[0130] 1. Apply the flexible wallpaper substrate produced by this application to a mildew-proof wallpaper. Print a pattern on the flexible wallpaper substrate coated with 20 - 60 g / m² of mildew-proof primer to obtain a mildew-proof wallpaper.

[0131] 2. Apply the flexible wallpaper substrate produced by this application to a high-white mildew-proof wallpaper. Print a pattern on the flexible wallpaper substrate coated with 20 - 80 g / m² of high-white mildew-proof primer to obtain a high-white mildew-proof wallpaper.

[0132] 3. Apply the flexible wallpaper substrate produced by this application to a wallpaper with a three-dimensional effect. On the flexible wallpaper substrate coated with 60 - 150 g / m² of primer and subjected to high-temperature foaming and embossing, apply ordinary paint / painting to obtain a wallpaper with a three-dimensional effect.

[0133] In summary, the first aspect of the present invention provides a wallpaper substrate. The obtained wallpaper substrate has good flexibility and light resistance, and the apparent color of the obtained wallpaper substrate is controllable. This wallpaper substrate can be directly put into use, which is convenient for small wallpaper production enterprises to use and achieves the goal of efficient wallpaper production.

[0134] The second aspect provides a method for producing a wallpaper substrate. Through this method, under the original wallpaper production conditions, wallpaper substrates with different flexible effects can be obtained.

[0135] The third aspect provides an application method for the wallpaper substrate, providing application schemes for the wallpaper substrate in mildew-proof wallpapers, in mildew-proof wallpapers with higher vividness, and in painted wallpapers / painted wallpapers with a three-dimensional effect.

[0136] The above embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should fall within the protection scope 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, the coating amount of the primer layer being 20 - 150 g / m², and the primer layer comprising the following components in parts by mass: Polyvinyl chloride resin 30 - 60 parts; Ethylene - vinyl acetate copolymer resin 10 - 20 parts; Diisononyl phthalate 20 - 40 parts; Tetrahydrofuran 15 - 30 parts; Filler 30 - 60 parts; Diluent 1 - 10 parts; Compound stabilizer 2 - 5 parts; Dicumyl peroxide 0.1 - 0.5 parts; Antioxidant 0.05 - 0.15 parts; Among them, The compound 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 solvent naphtha No. 200; 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; Among them, the primer layer further comprises a mildew - proof agent, the addition amount of the mildew - proof agent being 0.2 - 1 part; and the active ingredient of the mildew - proof agent ≥ 5%; Among them, the primer layer further comprises azodicarbonamide blowing agent, the addition amount of the azodicarbonamide blowing agent being 1 - 4 parts; Among them, the primer layer further comprises a whitening agent, the addition amount of the whitening agent and the mass ratio of the primer being (0.0001 - 0.0005):

1.

2. The flexible wallpaper substrate according to claim 1, 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.

3. A flexible wallpaper substrate according to claim 1, wherein: The production method of the flexible wallpaper substrate comprises the following steps: S1. Prepare a common wallpaper substrate; S2. Configure the primer: (S21): Add ethylene - vinyl acetate copolymer resin to tetrahydrofuran for dissolution. After dissolution, a high - molecular elastomer is obtained for later use; (S22): Weigh the raw materials of the above components except ethylene - vinyl acetate copolymer resin, tetrahydrofuran and polyvinyl chloride, and add them to 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 to the premix obtained in (S22), and stir for 20 - 30 min to obtain a paste resin; S3. Print / scrape / spray the paste resin prepared in (S23) on the surface of the substrate at 20 - 150 g / m², and dry at 140 - 200 °C for 0.5 - 5 min. The paste resin dries and forms to obtain the wallpaper substrate; S4. Foam the wallpaper substrate obtained in S3 at 150 - 180 °C, and then emboss while it is hot to obtain a wallpaper base material with a texture effect.

4. An application of the flexible wallpaper substrate described in claim 3 in a mildew-proof wallpaper, characterized in that: Print a pattern on a flexible wallpaper substrate coated with 20 - 60 g / m² of mold-proof primer to obtain a mold-proof wallpaper.

5. An application of the flexible wallpaper substrate according to claim 3 in a wallpaper with a three-dimensional effect, characterized in that: Apply ordinary paint / artwork on a flexible wallpaper substrate coated with 60 - 150 g / m² of primer and subjected to high-temperature foaming and embossing to obtain a wallpaper with a three-dimensional effect.

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