Ink-resistant advertising cloth and its preparation process

Abstract

The invention discloses an advertising cloth that does not drop ink and a preparation process thereof, belonging to the field of advertising cloth. The advertising cloth comprises a chemical fiber cloth layer, a dip-coated waterproof coating, a primer coating, a foaming coating and a top coating, wherein the dip-coated waterproof coating is coated on the surface of the chemical fiber cloth layer, and the dip-coated waterproof coating is coated with a primer coating, a foaming coating and a top coating in sequence. The raw materials of each coating on the surface of the advertising cloth of the present application are appropriately proportioned, and the coating thickness is uniform, which solves the problem of ink drop caused by poor adsorption, UV resistance and waterproof ability of the surface coating.

Description

Technical Field

[0001] The invention belongs to the field of advertising cloths, and in particular relates to an ink-resistant advertising cloth and a preparation process thereof. Background Art

[0002] Conventional foam advertising cloth products on the market currently have the problem of ink falling off with a slight rubbing after printing. The main reasons are as follows: (1) The surface coating of the advertising cloth has poor adsorption, which will cause poor ink adhesion; (2) The advertising cloth is stored indoors and outdoors for a long time, and the advertising cloth and its surface coating have poor anti-ultraviolet and waterproof functions, resulting in serious ink loss, affecting subsequent use.

[0003] Following up on the relevant actual situation, the advertising cloths currently on the market have not effectively solved this problem. Therefore, a new foaming system process has been developed to solve the problem of ink loss on advertising cloths, which is of great significance. Summary of the invention

[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide an advertising cloth that does not drop ink and its preparation process. The raw materials of each coating on the advertising cloth surface are properly proportioned and the coating thickness is uniform, which solves the problem of ink drop caused by poor adsorption, UV resistance and waterproof ability of the surface coating.

[0005] On one hand, the present invention provides an advertising cloth that does not drop ink, the advertising cloth comprising a chemical fiber cloth layer, a dip-coated waterproof coating, a primer coating, a foaming coating and a top coating, the dip-coated waterproof coating is coated on the surface of the chemical fiber cloth layer, and the dip-coated waterproof coating is coated with the primer coating, the foaming coating and the top coating in sequence;

[0006] The dip-coated waterproof coating comprises the following components in mass percentage: 0.6-0.8% of 6C waterproofing agent, 0.02-0.04% of brightener, and 99.2-99.6% of deionized water;

[0007] The primer coating comprises the following components in percentage by mass: 45-50% textile emulsion, 0.5-1% ammonia water, 45-50% compound flame retardant, 1.5-2% carbon black, 0.2-0.3% defoamer, and 0.8-1.2% thickener;

[0008] The foaming coating comprises the following components in percentage by mass: 45-50% textile latex, 20-25% compound flame retardant, 15-20% dispersion, 2%-3% crosslinking agent, 0.5-1% brightener, 10-12% foaming stabilizer, and 0.8-1.2% thickener;

[0009] The surface coating comprises the following components in percentage by mass: 40-50% of textile emulsion, 10-15% of polyurethane emulsion, 40-45% of dispersion liquid, 0.8-1.2% of defoamer, 0.8-1.2% of thickener and 0.5-1% of ammonia water.

[0010] Another aspect of the present invention provides a process for preparing the above-mentioned ink-resistant advertising cloth, the preparation process comprising the following steps:

[0011] Step 1: Preparation of waterproof coating by dipping

[0012] Mix 0.6-0.8% by mass of 6C waterproofing agent, 0.02-0.04% of brightener, and 99.2-99.6% of deionized water and stir evenly, adjust the pH value to 5-6 with acetic acid, apply the coating on the surface of the chemical fiber cloth layer by padding and dipping, and form a dip-coated waterproof coating after drying and setting;

[0013] Step 2: Preparation of primer coating

[0014] 45-50% by mass of textile emulsion, 0.5-1% ammonia water, 45-50% of compound flame retardant, 1.5-2% of carbon black, 0.2-0.3% of defoamer, and 0.8-1.2% of thickener are mixed evenly, the pH value is adjusted to 7-8 with ammonia water, the viscosity is adjusted to 8000cps / 4#30R with the thickener, and the coating is evenly scraped on the dip-coated waterproof coating by a flat knife, and dried and cured to form a primer coating;

[0015] Step 3: Preparation of foaming coating

[0016] 45-50% by mass of textile emulsion, 20-25% of compound flame retardant, 15-20% of dispersion, 2%-3% of crosslinking agent, 0.5-1% of brightener, 10-12% of foaming stabilizer, and 0.8-1.2% of thickener are mixed evenly, the pH value is adjusted to 9 with ammonia water, the viscosity is adjusted to 1200-1600cps / 4#60R with the thickener, and the coating is evenly applied on the primer coating by straight scraping with a foaming E-type knife, and dried and cured to form a foaming coating;

[0017] Step 4: Preparation of topcoat

[0018] 40-50% by mass of textile emulsion, 10-15% by mass of polyurethane emulsion, 40-45% by mass of dispersion, 0.8-1.2% by mass of defoamer, 0.8-1.2% by mass of thickener and 0.5-1% by mass of ammonia water are uniformly mixed, the pH value is adjusted to 7-8 by ammonia water, the viscosity is adjusted to 6500-7000cps / 4#30R by mass of thickener, the coating is uniformly scraped on the foaming coating by straight scraping with a D-type knife, and a top coating is formed after drying and curing.

[0019] The beneficial effects of the present invention include at least one of the following:

[0020] 1. The application provides an ink-resistant advertising cloth, comprising a chemical fiber cloth layer, a dip-coated waterproof coating, a primer coating, a foaming coating and a top coating. The raw materials of each coating are appropriately proportioned and the coating thickness is uniform, which solves the ink-shedding problem caused by poor adsorption, UV resistance and waterproofing of the surface coating;

[0021] 2. The present application provides an ink-resistant advertising cloth, wherein the polyester chemical fiber cloth is woven with 150D / 48F light mesh yarn, which solves the problem of poor firmness of the surface coating of the advertising cloth and poor ink adhesion;

[0022] 3. The present application provides an ink-resistant advertising cloth, whose dip-coated waterproof coating improves the overall waterproof ability of the advertising cloth;

[0023] 4. The ink-resistant advertising cloth provided in this application has a suitable ratio of base material, which enhances the flame retardancy and can achieve high flame retardancy;

[0024] 5. The present application provides an ink-resistant advertising cloth, wherein the foam coating is stabilized by controlling the temperature of the foaming coating entering the oven and the wind speed during foaming;

[0025] 6. The application provides an ink-resistant advertising cloth, the surface coating of which includes textile emulsion, polyurethane emulsion, dispersion, defoamer, thickener and ammonia water, which enhances the overall anti-scratch ability of the advertising cloth;

[0026] 7. The application provides a process for preparing ink-resistant advertising cloth, which uses batch raw materials, has strong versatility, is easy to mass-produce, and has good prospects for industrial application. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below by way of examples.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0029] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0030] Hereinafter, an ink-resistant advertising cloth and a preparation process thereof according to the present invention will be described in detail in conjunction with exemplary embodiments.

[0031] In an exemplary embodiment of the present invention, a process for preparing an ink-resistant advertising cloth can be achieved by the following steps:

[0032] Step 1: Preparation of waterproof coating by dipping

[0033] 0.6-0.8% by mass of 6C waterproofing agent, 0.02-0.04% of brightener and 99.2-99.6% of deionized water are mixed and stirred evenly, the pH value is adjusted to 5-6 with acetic acid, and the coating is applied to the surface of the chemical fiber cloth layer by padding and dipping. The padding pressure is 0.3 MPa, the wet material amount is 70-90 gsm, and it is dried and shaped at 200°C to form a dip-coated waterproof coating.

[0034] The chemical fiber cloth layer is polyester chemical fiber cloth, and the polyester chemical fiber cloth is woven with 150D / 48F light mesh yarn. The 6C waterproofing agent is any one of a fluorocarbon copolymer and a hydroxymethyl melamine derivative, but the present invention is not limited thereto. The brightener is any one of 1-o-cyanostyryl and phthalimide, but the present invention is not limited thereto.

[0035] Step 2: Preparation of primer coating

[0036] 45-50% by mass of textile emulsion, 0.5-1% ammonia water, 45-50% of compound flame retardant, 1.5-2% of carbon black, 0.2-0.3% of defoamer and 0.8-1.2% of thickener are mixed evenly, the pH value is adjusted to 7-8 with ammonia water, the viscosity is adjusted to 8000cps / 4#30R with the thickener, the coating is evenly scraped on the dip-coated waterproof coating by a flat knife, and dried and cured at 150°C to form a primer coating.

[0037] Wherein, the textile emulsion is any one of a modified acrylic resin with a TG value of -22°C, a modified acrylic resin with a TG value of -15°C, and an aqueous polycarbonate aliphatic polyurethane emulsion, but the present invention is not limited thereto. The compound flame retardant is prepared by compounding decabromodiphenylethane, ammonium polyphosphate, cyanuric acid melamine salt and water in a weight ratio of 3:3:1:3. The defoamer is any one of an emulsified polysiloxane compounded with metal stearate and polydimethylsiloxane, but the present invention is not limited thereto. The thickener is any one of an acrylic polymer and a polyurethane thickener, but the present invention is not limited thereto.

[0038] Step 3: Preparation of foaming coating

[0039] 45-50% by mass of textile emulsion, 20-25% of compound flame retardant, 15-20% of dispersion, 2%-3% of crosslinking agent, 0.5-1% of brightener, 10-12% of foaming stabilizer and 0.8-1.2% of thickener are mixed evenly, the pH value is adjusted to 9 with ammonia water, the viscosity is adjusted to 1200-1600cps / 4#60R with the thickener, the coating is evenly applied on the primer coating by straight scraping with a foaming E-type knife, and dried and cured under the conditions of temperature of 160°C and wind speed of 800-1000r / min to form a foaming coating.

[0040] Among them, the textile emulsion is any one of a modified acrylic resin with a TG value of -22°C and a water-based polycarbonate aliphatic polyurethane emulsion, but the present invention is not limited thereto. The compound flame retardant is prepared by compounding decabromodiphenylethane, ammonium polyphosphate, cyanuric acid melamine salt and water in a weight ratio of 3:3:1:3. The dispersion is prepared by compounding glassy silica and water in a weight ratio of 10:2. The crosslinking agent is any one of a high-efficiency amino-modified crosslinking agent and an isocyanate crosslinking agent, but the present invention is not limited thereto. By introducing different amounts of tube energy groups with different reactivities, its curing performance is improved. The whitening agent is any one of 1-o-cyanophenylene and phthalimide, but the present invention is not limited thereto. The foaming stabilizer is a phosphorylated polyol ester. The thickener is any one of an acrylic polymer and a polyurethane thickener, but the present invention is not limited thereto.

[0041] Step 4: Preparation of topcoat

[0042] 40-50% by mass of textile emulsion, 10-15% by mass of polyurethane emulsion, 40-45% by mass of dispersion, 0.8-1.2% by mass of defoamer, 0.8-1.2% by mass of thickener and 0.5-1% by mass of ammonia water are uniformly mixed, the pH value is adjusted to 7-8 by ammonia water, the viscosity is adjusted to 6500-7000cps / 4#30R by mass of thickener, the coating is uniformly scraped on the foaming coating by straight scraping with a D-type knife, and dried and cured at 160°C to form a top coating.

[0043] Wherein, the textile emulsion is any one of a modified acrylic resin with a TG value of -22°C and a modified acrylic resin with a TG value of -15°C, however, the present invention is not limited thereto. The polyurethane emulsion is a modified water-based polycarbonate aliphatic polyurethane emulsion. The dispersion is prepared by compounding glassy silica and water in a weight ratio of 10:2. The defoamer is any one of an emulsified polysiloxane compounded with metal stearate and polydimethylsiloxane, however, the present invention is not limited thereto. The thickener is any one of an acrylic polymer and a polyurethane thickener, however, the present invention is not limited thereto.

[0044] The advertising cloth prepared by the above preparation process includes a chemical fiber cloth layer, a dip-coated waterproof coating, a primer coating, a foaming coating and a top coating. The dip-coated waterproof coating is coated on the surface of the chemical fiber cloth layer, and the dip-coated waterproof coating is coated with a primer coating, a foaming coating and a top coating in sequence.

[0045] Example 1

[0046] In this embodiment, an ink-resistant advertising cloth 1# is prepared, which includes a chemical fiber cloth layer, a dip-coated waterproof coating, a primer coating, a foam coating and a top coating. The dip-coated waterproof coating is coated on the surface of the chemical fiber cloth layer, and the dip-coated waterproof coating is coated with a primer coating, a foam coating and a top coating in sequence. The chemical fiber cloth layer is a polyester chemical fiber cloth, and the polyester chemical fiber cloth is woven with 150D / 48F light mesh yarn. The remaining coatings are prepared using the following process:

[0047] Step 1: Preparation of waterproof coating by dipping

[0048] 0.8% by mass of fluorocarbon copolymer, 0.04% of 1-o-cyanostyryl and 99.6% of deionized water were mixed and stirred evenly, the pH value was adjusted to 5-6 with acetic acid, and the coating was applied to the surface of the chemical fiber cloth layer by padding and dipping. The padding pressure was 0.3 MPa, the wet material amount was 90 gsm, and it was dried and shaped at 200°C to form a dip-coated waterproof coating.

[0049] Step 2: Preparation of primer coating

[0050] 50% by mass of modified acrylic resin with a TG value of -22°C, 1% ammonia water, 50% compound flame retardant, 2% carbon black, 0.3% emulsified polysiloxane compound metal stearate, and 1% acrylic polymer are mixed evenly, the pH value is adjusted to 7-8 with ammonia water, the viscosity is adjusted to 8000cps / 4#30R with acrylic polymer, the coating is evenly scraped on the dip-coated waterproof coating with a flat knife, and dried and cured at 150°C to form a primer coating.

[0051] Step 3: Preparation of foaming coating

[0052] 50% by mass of water-based polycarbonate aliphatic polyurethane emulsion, 25% of compound flame retardant, 20% of dispersion, 3% of high-efficiency amino-modified crosslinking agent, 1% of 1-o-cyanostyrene, 12% of phosphorylated polyol ester and 1% of acrylic polymer are mixed evenly, the pH value is adjusted to 9 with ammonia water, the viscosity is adjusted to 1600cps / 4#60R with acrylic polymer, the coating is evenly applied on the primer coating by straight scraping with a foaming E-type knife, and dried and cured at a temperature of 160°C and a wind speed of 800r / min to form a foaming coating.

[0053] Step 4: Preparation of topcoat

[0054] 50% by mass of modified acrylic resin with a TG value of -22°C, 15% of modified water-based polycarbonate aliphatic polyurethane emulsion, 45% of dispersion, 1% of emulsified polysiloxane compounded metal stearate, 1% of acrylic polymer and 1% of ammonia water are mixed evenly, the pH value is adjusted to 7-8 with ammonia water, the viscosity is adjusted to 7000cps / 4#30R with acrylic polymer, and the coating is evenly scraped on the foaming coating by a D-type knife in a straight scraping manner, and dried and cured at 160°C to form a top coating.

[0055] Example 2

[0056] This embodiment prepares another non-ink-removing advertising cloth 2#, including a chemical fiber cloth layer, a dip-coated waterproof coating, a primer coating, a foaming coating and a top coating. The dip-coated waterproof coating is coated on the surface of the chemical fiber cloth layer, and the dip-coated waterproof coating is coated with a primer coating, a foaming coating and a top coating in sequence. The chemical fiber cloth layer is a polyester chemical fiber cloth, and the polyester chemical fiber cloth is woven with 150D / 48F light mesh yarn. The remaining coatings are prepared using the following process:

[0057] Step 1: Preparation of waterproof coating by dipping

[0058] 0.6% by mass of hydroxymethyl melamine derivative, 0.02% of 1-o-cyanostyryl and 99.2% of deionized water are mixed and stirred evenly, the pH value is adjusted to 5-6 with acetic acid, and the coating is applied to the surface of the chemical fiber cloth layer by padding and dipping. The padding pressure is 0.3 MPa, the wet material amount is 70 gsm, and it is dried and shaped at 200°C to form a dip-coated waterproof coating.

[0059] Step 2: Preparation of primer coating

[0060] 45% by mass of water-based polycarbonate aliphatic polyurethane emulsion, 0.5% ammonia water, 45% compound flame retardant, 1.5% carbon black, 0.2% emulsified polysiloxane compound metal stearate and 1% acrylic polymer are mixed evenly, the pH value is adjusted to 7-8 with ammonia water, the viscosity is adjusted to 8000cps / 4#30R with acrylic polymer, and the coating is evenly scraped on the dip-coated waterproof coating by straight scraping with a flat knife, and dried and cured at 150°C to form a primer coating.

[0061] Step 3: Preparation of foaming coating

[0062] 45% by mass of modified acrylic resin with a TG value of -22°C, 20% of a compound flame retardant, 15% of a dispersion, 2% of an isocyanate crosslinking agent, 0.5% of 1-o-cyanostyryl, 10% of a phosphorylated polyol ester, and 1% of an acrylic polymer are mixed evenly, the pH value is adjusted to 9 with aqueous ammonia, the viscosity is adjusted to 1200cps / 4#60R with an acrylic polymer, the coating is evenly applied on the primer coating by a foaming E-type knife straight scraping method, and the coating is dried and cured at a temperature of 160°C and a wind speed of 850r / min to form a foaming coating.

[0063] Step 4: Preparation of topcoat

[0064] 40% by mass of modified acrylic resin with a TG value of -15°C, 10% of modified water-based polycarbonate aliphatic polyurethane emulsion, 40% of dispersion, 1% of polydimethylsiloxane, 1% of polyurethane thickener, and 0.5% of ammonia water are mixed evenly, the pH value is adjusted to 7-8 with ammonia water, and the viscosity is adjusted to 6500cps / 4#30R with a polyurethane thickener. The coating is evenly scraped on the foaming coating with a D-type knife, and dried and cured at 160°C to form a top coating.

[0065] Example 3

[0066] This embodiment prepares another non-ink-removing advertising cloth 3#, including a chemical fiber cloth layer, a dip-coated waterproof coating, a primer coating, a foaming coating and a top coating. The dip-coated waterproof coating is coated on the surface of the chemical fiber cloth layer, and the dip-coated waterproof coating is coated with a primer coating, a foaming coating and a top coating in sequence. The chemical fiber cloth layer is a polyester chemical fiber cloth, and the polyester chemical fiber cloth is woven with 150D / 48F light mesh yarn. The remaining coatings are prepared using the following process:

[0067] Step 1: Preparation of waterproof coating by dipping

[0068] 0.7% by mass of fluorocarbon copolymer, 0.03% by mass of phthalimide and 99.4% by mass of deionized water were mixed and stirred evenly, the pH value was adjusted to 5-6 with acetic acid, and the coating was applied to the surface of the chemical fiber cloth layer by padding and dipping. The padding pressure was 0.3 MPa, the wet material amount was 80 gsm, and it was dried and shaped at 200°C to form a dip-coated waterproof coating.

[0069] Step 2: Preparation of primer coating

[0070] The modified acrylic resin with a TG value of -22°C of 48% by mass, 0.7% ammonia water, 47% compound flame retardant, 1.8% carbon black, 0.25% polydimethylsiloxane and 1% polyurethane thickener are mixed evenly, the pH value is adjusted to 7-8 with ammonia water, the viscosity is adjusted to 8000cps / 4#30R with a polyurethane thickener, and the coating is evenly scraped on the dip-coated waterproof coating by a flat knife, and dried and cured at 150°C to form a primer coating.

[0071] Step 3: Preparation of foaming coating

[0072] 48% by mass of water-based polycarbonate aliphatic polyurethane emulsion, 22% of compound flame retardant, 18% of dispersion, 2.5% of high-efficiency amino-modified crosslinking agent, 0.7% of phthalimide, 11% of phosphorylated polyol ester and 1% of polyurethane thickener are mixed evenly, the pH value is adjusted to 9 with ammonia water, the viscosity is adjusted to 1400cps / 4#60R with polyurethane thickener, the coating is evenly applied on the primer coating by straight scraping with a foaming E-type knife, and dried and cured at a temperature of 160°C and a wind speed of 900r / min to form a foaming coating.

[0073] Step 4: Preparation of topcoat

[0074] 45% by mass of modified acrylic resin with a TG value of -22°C, 13% of modified water-based polycarbonate aliphatic polyurethane emulsion, 43% of dispersion, 1% of polydimethylsiloxane, 1% of acrylic polymer, and 0.8% of ammonia water are mixed evenly, the pH value is adjusted to 7-8 with ammonia water, and the viscosity is adjusted to 6800cps / 4#30R with acrylic polymer. The coating is evenly scraped on the foaming coating by a D-type knife in a straight scraping manner, and dried and cured at 160°C to form a top coating.

[0075] Example 4

[0076] This embodiment prepares another non-ink-removing advertising cloth 4#, including a chemical fiber cloth layer, a dip-coated waterproof coating, a primer coating, a foaming coating and a top coating. The dip-coated waterproof coating is coated on the surface of the chemical fiber cloth layer, and the dip-coated waterproof coating is coated with a primer coating, a foaming coating and a top coating in sequence. The chemical fiber cloth layer is a polyester chemical fiber cloth, and the polyester chemical fiber cloth is woven with 150D / 48F light mesh yarn. The remaining coatings are prepared using the following process:

[0077] Step 1: Preparation of waterproof coating by dipping

[0078] 0.6% by mass of hydroxymethyl melamine derivative, 0.04% by mass of phthalimide and 99.5% by mass of deionized water are mixed and stirred evenly, the pH value is adjusted to 5-6 with acetic acid, and the coating is applied to the surface of the chemical fiber cloth layer by padding and dipping. The padding pressure is 0.3 MPa, the wet material amount is 85 gsm, and it is dried and shaped at 200°C to form a dip-coated waterproof coating.

[0079] Step 2: Preparation of primer coating

[0080] 48% by mass of water-based polycarbonate aliphatic polyurethane emulsion, 0.6% ammonia water, 50% compound flame retardant, 1.9% carbon black, 0.2% polydimethylsiloxane and 1% polyurethane thickener are mixed evenly, the pH value is adjusted to 7-8 with ammonia water, and the viscosity is adjusted to 8000cps / 4#30R with a polyurethane thickener. The coating is evenly scraped on the dip-coated waterproof coating with a flat knife, and dried and cured at 150°C to form a primer coating.

[0081] Step 3: Preparation of foaming coating

[0082] 48% by mass of modified acrylic resin with a TG value of -22°C, 24% of a compound flame retardant, 16% of a dispersion, 3% of an isocyanate crosslinking agent, 0.7% of 1-o-cyanostyryl, 10% of a phosphorylated polyol ester, and 1% of an acrylic polymer are mixed evenly, the pH value is adjusted to 9 with ammonia water, the viscosity is adjusted to 1500cps / 4#60R with an acrylic polymer, the coating is evenly applied on the primer coating by a foaming E-type knife straight scraping method, and the coating is dried and cured at a temperature of 160°C and a wind speed of 950r / min to form a foaming coating.

[0083] Step 4: Preparation of topcoat

[0084] 48% by mass of modified acrylic resin with a TG value of -15°C, 11% of modified water-based polycarbonate aliphatic polyurethane emulsion, 40% of dispersion, 1% of emulsified polysiloxane compounded metal stearate, 1% of polyurethane thickener, and 1% of ammonia water are mixed evenly, the pH value is adjusted to 7-8 with ammonia water, the viscosity is adjusted to 6700cps / 4#30R with a polyurethane thickener, and the coating is evenly scraped on the foaming coating by a D-type knife in a straight scraping manner, and dried and cured at 160°C to form a top coating.

[0085] Example 5

[0086] This embodiment prepares another non-ink-removing advertising cloth 5#, including a chemical fiber cloth layer, a dip-coated waterproof coating, a primer coating, a foaming coating and a top coating. The dip-coated waterproof coating is coated on the surface of the chemical fiber cloth layer, and the dip-coated waterproof coating is coated with a primer coating, a foaming coating and a top coating in sequence. The chemical fiber cloth layer is a polyester chemical fiber cloth, and the polyester chemical fiber cloth is woven with 150D / 48F light mesh yarn. The remaining coatings are prepared using the following process:

[0087] Step 1: Preparation of waterproof coating by dipping

[0088] 0.8% by mass of fluorocarbon copolymer, 0.03% by mass of phthalimide and 99.5% by mass of deionized water were mixed and stirred evenly, the pH value was adjusted to 5-6 with acetic acid, and the coating was applied to the surface of the chemical fiber cloth layer by padding and dipping. The padding pressure was 0.3 MPa, the wet material amount was 90 gsm, and it was dried and shaped at 200°C to form a dip-coated waterproof coating.

[0089] Step 2: Preparation of primer coating

[0090] The modified acrylic resin with a TG value of -22°C of 46% by mass, 0.5% ammonia water, 47% compound flame retardant, 1.6% carbon black, 0.3% emulsified polysiloxane compound metal stearate and 1% polyurethane thickener were mixed evenly, the pH value was adjusted to 7-8 with ammonia water, the viscosity was adjusted to 8000cps / 4#30R with a polyurethane thickener, and the coating was evenly scraped on the dip-coated waterproof coating by a flat knife, and dried and cured at 150°C to form a primer coating.

[0091] Step 3: Preparation of foaming coating

[0092] 46% by mass of modified acrylic resin with a TG value of -22°C, 21% of a compound flame retardant, 19% of a dispersion, 2.5% of a high-efficiency amino-modified crosslinking agent, 1% of phthalimide, 11% of a phosphorylated polyol ester, and 1% of a polyurethane thickener are mixed evenly, the pH value is adjusted to 9 with ammonia water, the viscosity is adjusted to 1300cps / 4#60R with a polyurethane thickener, the coating is evenly applied on the primer coating by a foaming E-type knife straight scraping method, and dried and cured at a temperature of 160°C and a wind speed of 1000r / min to form a foaming coating.

[0093] Step 4: Preparation of topcoat

[0094] 45% by mass of modified acrylic resin with a TG value of -15°C, 13% of modified water-based polycarbonate aliphatic polyurethane emulsion, 44% of dispersion, 1% of polydimethylsiloxane, 1% of acrylic polymer and 1% of ammonia water are mixed evenly, the pH value is adjusted to 7-8 with ammonia water, the viscosity is adjusted to 7000cps / 4#30R with acrylic polymer, and the coating is evenly scraped on the foaming coating by a D-type knife in a straight scraping manner, and dried and cured at 160°C to form a top coating.

[0095] Comparative Example 1

[0096] In this comparative example, a comparative advertising cloth D1# is prepared, which is different from Example 1 in that the polyester chemical fiber cloth woven from 150D / 48F light mesh yarn is replaced by polyethylene woven cloth.

[0097] Comparative Example 2

[0098] This comparative example prepares a comparative advertising cloth D2#, which is different from Example 1 in that the 6C waterproofing agent in the raw material for preparing the waterproof coating in step 1 is replaced by PFHS (meth)acrylate perfluorohexyl ethyl ester copolymer.

[0099] Comparative Example 3

[0100] In this comparative example, a comparative advertising cloth D3# is prepared, which is different from Example 1 in that the compound flame retardant in the raw material for preparing the primer coating in step 2 is replaced by melamine cyanurate.

[0101] Comparative Example 4

[0102] In this comparative example, a comparative advertising cloth D4# is prepared, which is different from Example 1 in that: the textile emulsion in the raw material for preparing the foaming coating in step 3 is replaced by ethylene acetate-ethylene copolymer emulsion, and the foaming stabilizer phosphated polyol ester is replaced by polyacrylamide.

[0103] Comparative Example 5

[0104] In this comparative example, a comparative advertising cloth D5# is prepared, which is different from Example 1 in that the modified water-based polycarbonate aliphatic polyurethane emulsion in the raw materials for preparing the coating on all four sides is replaced by a modified acrylic polyurethane emulsion, and the dispersion is replaced by titanium dioxide.

[0105] Test 1

[0106] The advertising cloths 1#-5# and D1#-D5# prepared in Examples 1-5 and Comparative Examples 1-5 were tested for various properties according to the industry standards or national standards for water resistance, flame retardancy, scratch resistance, and ink adsorption. The water resistance was tested according to the GB / T4745-2012 standard, and the flame retardancy was tested according to the GB8624-2012 standard. The test results are shown in Table 1.

[0107] Table 1

[0108] serial number Waterproof Flame retardant Scratch resistance level Ink adsorption 1# Level 5 and environmentally friendly B1 Level 5 powerful 2# Level 5 and environmentally friendly B1 Level 5 powerful 3# Level 5 and environmentally friendly B1 Level 5 powerful 4# Level 5 and environmentally friendly B1 Level 5 powerful 5# Level 5 and environmentally friendly B1 Level 5 powerful D1# Level 5 and environmentally friendly B1 Level 3 weak D2# Level 4 and environmentally friendly B1 Level 5 Weaker D3# Level 5 and environmentally friendly B2 Level 4 Weaker D4# Level 5 and environmentally friendly B1 Level 4 Weaker D5# Level 5 and environmentally friendly B2 Level 3 Weaker

[0109] As can be seen from Table 1, compared with advertising cloth 1#-5#, the polyester chemical fiber cloth woven from 150D / 48F light mesh yarn is replaced by polyolefin woven cloth, which has a low scratch resistance and poor ink adsorption.

[0110] Comparing advertising cloth D2# with advertising cloth 1#-5#, the 6C waterproofing agent in the raw material for preparing the waterproof coating in step 1 is replaced with PFHS (methyl) acrylate perfluorohexyl ethyl ester copolymer, and the waterproof property becomes worse, and the ink adsorption is also poor.

[0111] Comparing advertising cloth D3# with advertising cloth 1#-5#, the flame retardant in the raw materials for preparing the primer coating in step 2 is replaced with melamine cyanurate salt, the flame retardancy becomes worse, the scratch resistance level is reduced, and the ink adsorption is poor.

[0112] Comparing advertising cloth D4# with advertising cloth 1#-5#, the textile emulsion in the raw material for preparing the foaming coating in step three is replaced by ethylene acetate-ethylene copolymer emulsion, and the foam stabilizer is replaced by polyacrylamide, the scratch resistance level is reduced and the ink adsorption is poor.

[0113] Comparing advertising cloth D5# with advertising cloth 1#-5#, the modified water-based polycarbonate aliphatic polyurethane emulsion in the raw materials for preparing the coating on all four sides was replaced by modified acrylic polyurethane emulsion, and the dispersion was replaced by titanium dioxide. The flame retardancy was deteriorated, the scratch resistance level was reduced, and the ink adsorption was poor.

[0114] Test 2

[0115] The advertising cloths prepared in Examples 1-5 and Comparative Examples 1-5 were subjected to accelerated aging experiments, specifically, the advertising cloths 1#-5# and D1#-D5# were placed in a UV aging test box at the same time, the UV aging test box used a UVB-313 lamp, and the temperature was set to 40-60° C. The test results are shown in Table 2.

[0116] Table 2

[0117] serial number UV resistance level Aging time 1# A-level 12 months and above 2# A-level 12 months and above 3# A-level 12 months and above 4# A-level 12 months and above 5# A-level 12 months and above D1# C-Class 2-3 months D2# Class B 2-3 months D3# Class B 2-3 months D4# Class B 2-3 months D5# C-Class 2-3 months

[0118] As shown in Table 2, compared with advertising cloth 1#-5#, advertising cloth D1#-D5# has lower anti-ultraviolet level, and the anti-aging time is only 2-3 months before ink loss occurs, while the aging time of advertising cloth 1#-5# is more than 12 months, indicating that the advertising cloth itself has strong surface adsorption and anti-ultraviolet ability.

[0119] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An ink-resistant advertising cloth, characterized in that: The advertising cloth comprises a chemical fiber cloth layer, a dip-coated waterproof coating, a primer coating, a foaming coating and a top coating. The dip-coated waterproof coating is coated on the surface of the chemical fiber cloth layer, and a primer coating, a foaming coating and a top coating are sequentially coated on the dip-coated waterproof coating; The dip-coated waterproof coating includes the following components in mass percentage: 0.6-0.8% 6C waterproofing agent, 0.02-0.04% brightener, and 99.2-99.6% deionized water; The primer coating comprises the following components in percentage by mass: 45-50% textile emulsion, 0.5-1% ammonia water, 45-50% compound flame retardant, 1.5-2% carbon black, 0.2-0.3% defoamer, and 0.8-1.2% thickener; The foaming coating comprises the following components in percentage by mass: 45-50% textile emulsion, 20-25% compound flame retardant, 15-20% dispersion, 2%-3% crosslinking agent, 0.5-1% brightener, 10-12% foaming stabilizer, and 0.8-1.2% thickener; The top coating comprises the following components in percentage by mass: 40-50% textile emulsion, 10-15% polyurethane emulsion, 40-45% dispersion, 0.8-1.2% defoamer, 0.8-1.2% thickener, and 0.5-1% ammonia water; The chemical fiber cloth layer is polyester chemical fiber cloth, and the polyester chemical fiber cloth is woven with 150D / 48F light mesh yarn; The 6C waterproofing agent is any one of a fluorocarbon copolymer and a hydroxymethyl melamine derivative; the textile emulsion is any one of a modified acrylic resin with a Tg value of -22°C, a modified acrylic resin with a Tg value of -15°C, and a water-based polycarbonate aliphatic polyurethane emulsion; the compound flame retardant is prepared by compounding decabromodiphenylethane, ammonium polyphosphate, cyanuric acid melamine salt and water in a weight ratio of 3:3:1:3; the dispersion is prepared by compounding glassy silica and water in a weight ratio of 10:2; the foaming stabilizer is a phosphated polyol ester; and the polyurethane emulsion is a modified water-based polycarbonate aliphatic polyurethane emulsion.

2. The advertising cloth according to claim 1, characterized in that: The brightener is any one of a 1-o-cyanostyryl brightener and a phthalimide brightener.

3. The advertising cloth according to claim 1, characterized in that: The defoamer is any one of emulsified polysiloxane compounded with metal stearate and polydimethylsiloxane; the thickener is any one of acrylic acid polymer and polyurethane thickener.

4. The advertising cloth according to claim 1, characterized in that: The cross-linking agent is any one of a high-efficiency amino-modified cross-linking agent and an isocyanate cross-linking agent.

5. A process for preparing the ink-resistant advertising cloth according to any one of claims 1 to 4, characterized in that: The preparation process comprises the following steps: Step 1: Preparation of waterproof coating by dipping Mix and stir 0.6-0.8% by mass of 6C waterproofing agent, 0.02-0.04% of brightener, and 99.2-99.6% of deionized water, adjust the pH value to 5-6 with acetic acid, apply the coating on the surface of the chemical fiber cloth layer by padding and dipping, and form a dip-coated waterproof coating after drying and setting; Step 2: Preparation of primer coating 45-50% by mass of textile emulsion, 0.5-1% ammonia water, 45-50% of compound flame retardant, 1.5-2% of carbon black, 0.2-0.3% of defoamer, and 0.8-1.2% of thickener are mixed evenly, pH value is adjusted to 7-8 with ammonia water, viscosity is adjusted to 8000 cps / 4#30R with thickener, and the coating is evenly scraped on the dip-coated waterproof coating by straight scraping with a flat knife, and dried and cured to form a primer coating; Step 3: Preparation of foaming coating 45-50% by mass of textile emulsion, 20-25% of compound flame retardant, 15-20% of dispersion, 2%-3% of crosslinking agent, 0.5-1% of brightener, 10-12% of foaming stabilizer, and 0.8-1.2% of thickener are mixed evenly, pH value is adjusted to 9 with ammonia water, viscosity is adjusted to 1200-1600 cps / 4#60R with thickener, and the coating is evenly applied on the primer coating by straight scraping with a foaming E-type knife, and dried and cured to form a foaming coating; Step 4: Preparation of topcoat 40-50% by mass of textile emulsion, 10-15% by mass of polyurethane emulsion, 40-45% by mass of dispersion, 0.8-1.2% by mass of defoamer, 0.8-1.2% by mass of thickener, and 0.5-1% by mass of ammonia water are uniformly mixed, the pH value is adjusted to 7-8 with ammonia water, the viscosity is adjusted to 6500-7000 cps / 4#30R with a thickener, and the coating is uniformly scraped on the foaming coating by straight scraping with a D-type knife, and after drying and curing, a top coating is formed.

6. The preparation process according to claim 5, characterized in that: During the preparation process of the dip-coating waterproof coating in step 1, the rolling pressure is 0.3 MPa and the wet material amount is 70-90 gsm.

7. The preparation process according to claim 5, characterized in that: Step 3: During the preparation of the foaming coating, the drying and curing temperature is 160°C and the wind speed is 800-1000 r / min.