Double spray cloth and its manufacturing process

Abstract

The invention belongs to the field of printing technology, and specifically relates to a double-spray cloth and a manufacturing process thereof, comprising a substrate layer, a shielding coating, a flame-retardant white coating, and a double-sided printing coating. The raw materials of the double-sided printing coating include 20 to 30 parts of an aqueous fluorocarbon resin, 1 to 2 parts of a mildewproof agent, 1 to 2 parts of a cross-linking agent, and 1 to 2 parts of an anti-sticking agent. The preparation process is simple and easy to operate. The prepared double-spray cloth can be stored for a long time, is non-sticky, has good mechanical properties, is not easy to mold, is solvent-resistant, and prevents curling. It dries quickly after printing, thereby improving printing efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of printing, and in particular relates to a double-spray cloth and a manufacturing process thereof. Background Art

[0002] With the development of the economy, more and more double-spray UV machines / photo machines have appeared, and more and more materials need to be printed on both sides. There are more and more demands for the same picture on the front and back, or different pictures on the front and back, which puts higher requirements on double-spray cloth.

[0003] Existing double-spray cloths are prone to mold, have a short service life, and dry too slowly when printing on both sides at the same time, affecting the printing speed. When printing different pictures on the front and back, the coating is not resistant to ink corrosion and is prone to curling toward the ink-heavy side. The pictures are also prone to curling when hung high in the air. In addition, unprinted rolls cannot be stored for a long time and are prone to sticking. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a double-spray cloth and a manufacturing process thereof. The preparation process is simple and easy to operate. The prepared double-spray cloth is not easy to stick, not easy to mold, dries quickly, is not easy to curl, can be preserved for a long time, and is suitable for more scenarios.

[0005] The technical solution of the present invention is as follows:

[0006] A double-sprayed cloth comprises a substrate layer, a shielding coating, a flame-retardant white coating and a double-sided printing coating. The raw materials of the double-sided printing coating comprise 20 to 30 parts of water-based fluorocarbon resin, 1 to 2 parts of mildewproofing agent, 1 to 2 parts of cross-linking agent and 1 to 2 parts of anti-sticking agent by weight.

[0007] Preferably, the water-based fluorocarbon resin is FEVE water-based fluorocarbon resin, which has excellent solvent resistance. The system using the resin and its compounding materials is stable, the prepared double-spray cloth can be scrubbed, dries quickly after printing, and does not curl when hung in the air.

[0008] Preferably, the mildew preventer is a mixture of any proportion of 4,5-dichloro-N-octyl-4-isothiazoline-3-one, iodopropynyl butyl carbamate, and n-butyl-1,2-benzisothiazolin-3-one. Further preferably, the mass ratio of 4,5-dichloro-N-octyl-4-isothiazoline-3-one, iodopropynyl butyl carbamate, and n-butyl-1,2-benzisothiazolin-3-one is 13 to 17:5 to 7:10. The three substances in this specific ratio are selected as mildew preventers, which have the highest inhibitory activity against Aspergillus niger and have high stability with the water-based coating compound system. The mildew preventer is added to the double-spray printing coating to prepare a double-spray cloth, which will not mold even if it is left for a long time during the rainy season.

[0009] Preferably, the crosslinking agent is trimethylolpropane trimethacrylate, and the anti-sticking agent is aluminum silicate. The use of the crosslinking agent can increase the degree of crosslinking and the solvent resistance, and at the same time, together with silicate, increase the anti-sticking effect, so that the double-sprayed cloth will not stick during long-term storage.

[0010] Preferably, the substrate layer is 150D / 48F, black yarn, substrate inch density 50*50, gram weight 140gsm / m 2 , 220~260um, light weight, high strength, easy construction, and also makes the prepared double spray cloth have more application scenarios.

[0011] Preferably, the shielding coating is prepared from a shielding paint, and the shielding paint raw materials include, by weight: 35-45 parts of VAE emulsion (vinyl acetate-ethylene copolymer emulsion), 26-33 parts of compounded light-shielding dispersion, 1-2 parts of defoaming agent A, 4-6 parts of carbon black, 1-2 parts of wetting agent, 1-2 parts of leveling agent, 1-2 parts of thickener, and 15-25 parts of deionized water;

[0012] The components of the composite light-shielding dispersion include: titanium dioxide, defoamer B, dispersant A, and deionized water, and the mass ratio thereof is 42-47:2-3:2-3:50;

[0013] After the above raw materials are mixed evenly, the pH value is adjusted to between 7 and 8 with ammonia water to obtain a shielding coating with a viscosity of 6000 to 8000 cps / 4#30R and a solid content of 50%.

[0014] Preferably, the flame retardant white coating is prepared from a flame retardant white paint, and the flame retardant white paint raw materials include, by weight: 25-35 parts of acrylic resin A, 48-53 parts of compound flame retardant, 1-3 parts of defoamer A, 1-2 parts of wetting agent, 1-2 parts of leveling agent, 1-2 parts of thickener, 1-3 parts of brightener, and 5-15 parts of deionized water;

[0015] The components of the compound flame retardant include: decabromodiphenylethane, antimony trioxide, zinc hydroxystannate, defoamer A, dispersant B, thickener, deionized water, and the mass ratio thereof is: 40-45:10-15:4-6:1-2:1-3:1-2:35;

[0016] After the above raw materials are mixed evenly, the pH value is adjusted to between 7 and 8 with ammonia water to obtain a flame retardant white coating with a viscosity of 6000 to 8000 cps / 4#30R and a solid content of 52%.

[0017] Preferably, the double-sided printing coating is prepared from a double-sided printing coating, and the raw materials of the double-sided printing coating include, by weight: 20 to 30 parts of water-based fluorocarbon resin, 15 to 20 parts of acrylic resin B, 28 to 33 parts of compound dispersion liquid, 1 to 2 parts of mildewproof agent, 1 to 2 parts of cross-linking agent, 1 to 2 parts of anti-adhesive agent, 1 to 2 parts of defoaming agent A, 1 to 2 parts of thickener, 1 to 2 parts of brightener, and 15 to 23 parts of deionized water;

[0018] The components of the composite dispersion include: silicon dioxide, dispersant B, defoamer B, and deionized water, and the mass ratio thereof is 18-22:1-3:1-2:75;

[0019] After the above raw materials are uniformly mixed, the pH is adjusted to 7-8 with ammonia water to obtain a double-sided printing coating with a viscosity of 6000-8000cps / 4#30R and a solid content of 35%. The double-sided printing coating prepared by the present invention has high storage stability and does not delaminate.

[0020] Preferably, the defoamer A is a copolymer of ethylene oxide and propylene oxide, the defoamer B is a polysiloxane defoamer prepared from polyether and dodecyl methacrylate modified silicone oil, the wetting agent is a siloxane surfactant with a twin structure, the leveling agent is a polyether modified silicone leveling agent, the thickener is a hydrophobically associating sodium acrylate thickener, the dispersant A is a sodium polyacrylate (co)polymer, the dispersant B is tristyrylphenol polyoxyethylene ether phosphate, the whitening agent is 4,4′-bis(4,6-diphenylamine triazine-2-amino) diphenylethylene-2,2′-disulfonic acid sodium salt, the acrylic resin A is a pure acrylic resin with a Tg value of -25°C, and the acrylic resin B is a pure acrylic resin with a Tg value of 15°C.

[0021] A double-spraying fabric production process comprises the following steps:

[0022] S1 substrate shaping: a 3.6m wide needle plate machine is used. During shaping, the temperature of the first section oven is controlled at 120-150℃, the temperature of the second section oven is controlled at 150-180℃, the temperature of the third and fourth sections ovens is controlled at 180-200℃, the temperature of the fifth, sixth and seventh sections ovens is controlled at 200-205℃, the temperature of the eighth section oven is controlled at 200-205℃, the temperature of the ninth section oven is controlled at 120-125℃, the speed is controlled at 30-33m / min, and the substrate shaping can prevent the substrate itself from curling, which is conducive to subsequent coating;

[0023] S2 shielding coating: scraping method is adopted, and the scraper is a 2mm flat knife. The shielding coating is scraped on one side of the substrate. A 3.6m wide needle plate machine is used. During coating, the temperature of the first section oven is controlled at 50-60℃, the temperature of the second section oven is controlled at 100-120℃, the temperature of the third and fourth sections ovens is controlled at 120-150℃, the temperature of the fifth, sixth and seventh sections ovens is controlled at 150-155℃, the temperature of the eighth section oven is controlled at 150-155℃, the temperature of the ninth section oven is controlled at 70-75℃, the vehicle speed is controlled at 15-18m / min, and the feeding weight is controlled at 20-30gsm / m 2 , coating thickness 100 ~ 200um, repeat the above process, coat the other side of the substrate, control this gram weight range, keep the front and back consistent, which can be used for shielding and also helps to prevent curling in the later stage;

[0024] S3 flame retardant white coating: scraping method is adopted, and the scraper is a 2mm flat knife. The flame retardant white coating is scraped on the surface of the shielding coating. A 3.6m wide needle plate machine is used. During coating, the temperature of the first section oven is controlled at 50-60℃, the temperature of the second section oven is controlled at 100-120℃, the temperature of the third and fourth sections oven is controlled at 120-150℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150-155℃, the temperature of the eighth section oven is controlled at 150-155℃, the temperature of the ninth section oven is controlled at 70-75℃, the vehicle speed is controlled at 15-18m / min, and the feeding weight is controlled at 50-60gsm / m 2 , coating thickness 200 ~ 300um, repeat the above process, and apply another shielding coating on the surface, control the gram weight, keep the front and back consistent, prevent curling, and at the same time shield the black coating, making the product surface look whiter and increasing the printing effect;

[0025] S4 double-sided printing coating: scraping method is adopted, and the scraper adopts 2mm flat knife to scrape the double-sided printing coating on the surface of the flame retardant white coating. A 3.6m wide needle plate machine is used. During coating, the temperature of the first section oven is controlled at 50-60℃, the temperature of the second section oven is controlled at 100-120℃, the temperature of the third and fourth sections oven is controlled at 120-150℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150-155℃, the temperature of the eighth section oven is controlled at 150-155℃, the temperature of the ninth section oven is controlled at 70-75℃, the vehicle speed is controlled at 15-18m / min, and the feeding weight is controlled at 10-15gsm / m 2 , coating thickness 100 ~ 150um, repeat the above process, and apply another flame retardant white coating on the surface, control the gram weight, keep the front and back consistent, prevent curling, mildew and adhesion, and ensure that both sides will not curl after printing.

[0026] The double-spray cloth of the present invention adopts a substrate layer with high strength and light weight, which can meet the strength requirements for use in multiple scenarios, improves the supporting force of the double-spray cloth, expands the application scenarios, and is easy to construct; a shielding coating is adopted, which is a black coating, for front and back shielding, and the shielding can be closely combined with the substrate layer, thereby improving the flatness and facilitating the subsequent continued scraping of the coating; a flame-retardant coating is adopted, which not only shields the black coating, but also increases the flame retardancy of the double-spray cloth, so that the flame retardancy of the double-spray cloth reaches DIN EN 13501-1 level; a double-sided printing coating is adopted, which has good solvent resistance, can be scrubbed, effectively prevents adhesion, does not adhere or mold after being left for a long time, and is not easy to curl (curl) when suspended in the air; in the present invention, the prepared coating is stable and not stratified, and the bonding performance between the layers of the composed double-spray cloth is good, and it is not easy to delaminate, and finally a double-spray cloth with excellent performance is prepared.

[0027] The FEVE water-based fluorocarbon resin selected in the present invention is a two-component room-temperature cross-linked polymer prepared using emulsion synthesis technology with chlorotrifluoroethylene and other functional monomers as raw materials. The active functional group carbonyl in the fluoropolymer emulsion undergoes a curing cross-linking reaction with hydrazides to form a uniform, transparent coating. The fluorocarbon emulsion has a relatively regular molecular arrangement, and the main chain contains fluorine atoms, rather than side chains or other forms. The FEVE water-based fluorocarbon resin of the present invention can be one of Changshu Zhonghao ZH-01, Dalian Zhenbang F600, Qingdao Hongfeng HFS-F-3301, and Changxing Chemical 4312.

[0028] At present, the double-spray cloths on the market are prone to adhesion and mildew, have a short service life, are easily damaged by scrubbing if they are slightly dirty, take a long time to dry after printing, and are prone to curling (curling) after being hung in the air, resulting in poor visual effects and dissatisfaction among users. In order to solve the various problems existing in the current double-spray cloths, the inventors have prepared a double-spray cloth after research. By selecting a specific substrate to match each layer of coating, the prepared double-spray cloth completely overcomes the above problems. The present invention selects a specific substrate layer so that the prepared double-spray cloth can meet the needs of multiple scenarios, selects a shielding coating that is tightly combined with the substrate layer, improves the flatness, and is conducive to the continued scraping of subsequent coatings, selects a flame-retardant white coating, effectively increases the flame retardant effect, and selects a double-sided printing coating, which can effectively solve most of the defects of the current double-spray cloths.

[0029] The water-based fluorocarbon resin selected in the double-sided printing coating of the present invention has excellent solvent resistance. When used together with a cross-linking agent, the cross-linking agent can increase the cross-linking effect, and together with the water-based fluorocarbon resin, the solvent resistance effect is increased, so that the prepared double-spray cloth has a significant solvent resistance effect, so that when the product is dirty, it can be scrubbed with alcohol wipes to remove the dirt without causing damage or bulging of the coating, so that the product is scrub-resistant; conventional double-spray cloths have poor solvent resistance, and the coating is a non-continuous interface with gaps inside. Especially when heavy color images need to be printed, due to the high solvent content in red, black and other inks, the solvent evaporates during drying after printing, and the coating shrinks, so that the product will curl toward the side with heavy ink. The present invention uses water-based fluorocarbon resin and a cross-linking agent to make the product have good solvent resistance During printing, the coating is less affected by the solvent of the ink. After printing, the coating is dried and the solvent evaporates. The coating basically does not shrink and will not cause the product to curl, which effectively solves the current problem of curling of the double-spray cloth. After adopting the water-based fluorocarbon resin, more silicon dioxide can be added to the water-based coating, so that the double-spray cloth dries quickly after printing, effectively shortening the drying time. In the present invention, a specific mildew inhibitor is added, and the mildew inhibitor and the water-based fluorocarbon resin compound system has high stability and no stratification, so that the mildew inhibitor can effectively exert its activity, improve the mildew resistance of the product, and increase the use time of the product. A cross-linking agent is added to effectively increase the degree of cross-linking, and an anti-sticking agent is added to effectively increase the anti-sticking effect. The cross-linking agent and the anti-sticking agent work together to make the product have the best anti-sticking effect, and can be stored for a long time without sticking.

[0030] The present invention provides a double-spray cloth and a manufacturing process thereof, the process is simple and easy to operate, the prepared double-spray cloth is flat (not curled), non-sticky, has excellent mechanical properties, good flame retardancy, and is not easy to mold, effectively prolongs the storage and use time of the double-spray cloth, expands the application scenarios, and shortens the drying time after printing, improves production efficiency, effectively improves production capacity, improves benefits, is solvent-resistant, scrubbable, can be suspended in the air, and does not curl, thereby improving the user experience, improving the visual effect, and improving the user satisfaction, and has a high market promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the double spray cloth of the present invention;

[0032] Figure 2 This is a comparison chart of the curling of the double-spray cloth of Example 1 and the ordinary commercially available competitive products after printing and drying.

[0033] In the figure, 1 is the substrate layer, 2 is the shielding coating, 3 is the flame-retardant white coating, and 4 is the double-sided printing coating. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with specific embodiments. It is pointed out that the following embodiments cannot be understood as limiting the scope of protection of the present invention. Simple substitutions or adjustments made by ordinary technicians in the field based on the contents of the present invention are all within the scope of protection of the present invention.

[0035] The defoamer A in the present invention is a copolymer of ethylene oxide and propylene oxide, the defoamer B is a polysiloxane defoamer made from polyether and dodecyl methacrylate modified silicone oil, the dispersant A is a sodium polyacrylate (co)polymer dispersant, the leveling agent is a polyether modified organic silicon leveling agent, the thickener is a hydrophobic associating sodium acrylate thickener, and the wetting agent is a siloxane surfactant with a twin structure. The specific further selection is as follows: the defoamer A is Datian Chemical, the polyether modified defoamer DT-250, the defoamer B is Evonik Degussa defoamer TEGO Antifoam 204, the dispersant A is BASF Dispex N40, the leveling agent is Evonik Tego Foamex 842, the thickener is TEGO ViscoPlus 3030, and the wetting agent is TEGOTwin 4000, dispersant B is tristyrylphenol polyoxyethylene ether phosphate, whitening agent is 4,4′-bis(4,6-diphenylaminotriazine-2-amino)stilbene-2,2′-disulfonic acid sodium salt, crosslinking agent is trimethylolpropane trimethacrylate, anti-sticking agent is aluminum orthosilicate nanoparticles (10-30nm), acrylic resin A is pure acrylic resin (Tg value is -25°C), acrylic resin B is (Tg value is 15°C); FEVE water-based fluorocarbon resin can use Changshu Zhonghao ZH-01.

[0036] Example 1

[0037] A double spray cloth production process, the specific steps are as follows:

[0038] S1 substrate shaping:

[0039] The base material layer is 150D / 48F, black yarn, base material inch density 50*50, gram weight 140gsm / m 2 , thickness is 230um; 3.6m width needle plate machine is used, only needle plate machine has this width, drying method: natural gas direct combustion heating, can better conduct heat and improve production efficiency, during coating, the temperature of the first section oven is controlled at 120℃, the temperature of the second section oven is controlled at 150℃, the temperature of the third and fourth sections oven is controlled at 180℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 200℃, the temperature of the eighth section oven is controlled at 200℃, the temperature of the ninth section oven is controlled at 120℃, and the speed is controlled at 30m / min;

[0040] S2 shielding coating:

[0041] The raw materials of the masking coating include: 40g of VAE emulsion (vinyl acetate-ethylene copolymer emulsion), 30g of compound light-shielding dispersion, 2g of defoamer A, 5g of carbon black, 1g of wetting agent, 1g of leveling agent, 1g of thickener, and 20g of deionized water.

[0042] Compound shading dispersion: titanium dioxide (pigment grade chloride rutile type with a fineness of 5 microns) 45g, defoamer B2g, dispersant A3g, deionized water 50g;

[0043] The above raw materials are mixed evenly, and the pH value is adjusted to between 7 and 8 with ammonia water to obtain a masking coating with a viscosity of 6000cps / 4#30R and a solid content of 50%;

[0044] The scraping method is adopted. The scraper uses a 2mm flat knife to scrape the masking paint on one side of the substrate. A 3.6m wide needle plate machine is used. Only the needle plate machine has this width. Drying method: natural gas direct combustion heating can better conduct heat and improve production efficiency. During coating, the temperature of the first section oven is controlled at 50℃, the temperature of the second section oven is controlled at 100℃, the temperature of the third and fourth sections oven is controlled at 150℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150℃, the temperature of the eighth section oven is controlled at 150℃, the temperature of the ninth section oven is controlled at 70℃, the vehicle speed is controlled at 15m / min, and the feeding weight is controlled at 20gsm / m 2 , coating thickness 100um,

[0045] Repeat the above process to coat the other side of the substrate;

[0046] S3 flame retardant white coating:

[0047] The raw materials of flame retardant white coating include: 30g of acrylic resin A, 50g of compound flame retardant, 2g of defoamer A, 2g of wetting agent, 2g of leveling agent, 1g of thickener, 3g of brightener, and 10g of deionized water;

[0048] The compound flame retardant is: 45g of decabromodiphenylethane, 10g of antimony trioxide, 5g of zinc hydroxystannate, 2g of defoamer A, 2g of dispersant B, 1g of thickener, and 35g of deionized water;

[0049] The above raw materials are mixed, and the pH value is adjusted to between 7 and 8 with ammonia water to obtain a flame retardant white coating with 8000cps / 4#30 and a solid content of 52%;

[0050] The scraping method is adopted, and the scraper uses a 2mm flat knife to scrape the flame retardant white paint on the surface of the shielding coating. A 3.6m wide needle plate machine is used. Only the needle plate machine has this width. Drying method: natural gas direct combustion heating can better conduct heat and improve production efficiency. During coating, the temperature of the first section oven is controlled at 50℃, the temperature of the second section oven is controlled at 120℃, the temperature of the third and fourth sections oven is controlled at 150℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150℃, the temperature of the eighth section oven is controlled at 150℃, the temperature of the ninth section oven is controlled at 70℃, the vehicle speed is controlled at 15m / min, and the feeding weight is controlled at 50gsm / m 2 , coating thickness 200um;

[0051] Repeat the above process to apply another shielding coating on the surface;

[0052] S4 double-sided printing coating:

[0053] The raw materials of the double-sided printing coating include: 25g of FEVE water-based fluorocarbon resin, 20g of acrylic resin B, 30g of compound dispersion liquid, 1g of mildew inhibitor, 1g of cross-linking agent, 1g of anti-sticking agent, 1g of defoaming agent A, 1g of thickener, 1g of brightener, and 19g of deionized water;

[0054] The compound dispersion liquid includes: 20g of ultrafine silicon dioxide (20um), 3g of dispersant B, 2g of defoamer B, and 75g of deionized water;

[0055] The mildew preventer is a mixture of 4,5-dichloro-N-octyl-4-isothiazoline-3-one, iodopropynyl butyl carbamate, and n-butyl-1,2-benzisothiazolin-3-one, with a mass ratio of 15:6:10;

[0056] After the above raw materials are mixed evenly, the pH is adjusted to 7-8 with ammonia water to obtain a double-sided printing coating with a viscosity of 7000cps / 4#30R and a solid content of 35%;

[0057] The scraping method is adopted, and the scraper uses a 2mm flat knife to scrape the double-sided printed paint on the surface of the flame-retardant white coating. A 3.6m wide needle plate machine is used. Only the needle plate machine has this width. Drying method: natural gas direct combustion heating can better conduct heat and improve production efficiency. During coating, the temperature of the first section oven is controlled at 60℃, the temperature of the second section oven is controlled at 120℃, the temperature of the third and fourth sections oven is controlled at 150℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150℃, the temperature of the eighth section oven is controlled at 150℃, the temperature of the ninth section oven is controlled at 70℃, the vehicle speed is controlled at 15m / min, the feeding weight is controlled at 15gsm / m 2 , coating thickness 100-150um,

[0058] Repeat the above process to apply another flame retardant white coating on the surface, and finally obtain the structural diagram of the product as shown in the figure. Figure 1 shown.

[0059] Example 2

[0060] A double spray cloth production process, the specific steps are as follows:

[0061] S1 substrate shaping:

[0062] The base material layer is 150D / 48F, black yarn, base material inch density 50*50, gram weight 140gsm / m 2 , thickness is 220um; 3.6m width needle plate machine is used, only needle plate machine has this width, drying method: natural gas direct combustion heating, can better conduct heat and improve production efficiency, during shaping, the temperature of the first section oven is controlled at 120℃, the temperature of the second section oven is controlled at 150℃, the temperature of the third and fourth sections oven is controlled at 180℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 200℃, the temperature of the eighth section oven is controlled at 200℃, the temperature of the ninth section oven is controlled at 120℃, and the speed is controlled at 30m / min;

[0063] S2 shielding coating:

[0064] The raw materials of the masking coating include: 35g of VAE emulsion (vinyl acetate-ethylene copolymer emulsion), 26g of compound light-shielding dispersion, 1g of defoaming agent A, 4g of carbon black, 1g of wetting agent, 1g of leveling agent, 1g of thickener, and 15g of deionized water.

[0065] Compound shading dispersion: titanium dioxide (pigment grade chloride rutile type with a fineness of 5 microns) 42g, defoamer B2g, dispersant A3g, deionized water 50g;

[0066] The above raw materials are mixed evenly, and the pH value is adjusted to between 7 and 8 with ammonia water to obtain a masking coating with a viscosity of 6500cps / 4#30R and a solid content of 49%;

[0067] The scraping method is adopted. The scraper uses a 2mm flat knife to scrape the masking paint on one side of the substrate. A 3.6m wide needle plate machine is used. Only the needle plate machine has this width. Drying method: natural gas direct combustion heating can better conduct heat and improve production efficiency. During coating, the temperature of the first section oven is controlled at 60℃, the temperature of the second section oven is controlled at 120℃, the temperature of the third and fourth sections oven is controlled at 150℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150℃, the temperature of the eighth section oven is controlled at 150℃, the temperature of the ninth section oven is controlled at 70℃, the vehicle speed is controlled at 15m / min, and the feeding weight is controlled at 30gsm / m 2 , coating thickness 200um,

[0068] Repeat the above process to coat the other side of the substrate;

[0069] S3 flame retardant white coating:

[0070] The raw materials of flame retardant white coating include: 25g acrylic resin A, 48g compound flame retardant, 1g defoamer A, 1g wetting agent, 1g leveling agent, 1g thickener, 1g whitening agent, 6g deionized water, and the compound flame retardant includes: 40g decabromodiphenylethane, 10g antimony trioxide, 4g zinc hydroxystannate, 1g defoamer A, 1g dispersant B, 1g thickener, 35g deionized water.

[0071] The above raw materials were mixed, and the pH value was adjusted to between 7 and 8 with ammonia water to obtain a flame retardant white coating with a solid content of 51% and 6000cps / 4#30.

[0072] The scraping method is adopted, and the scraper uses a 2mm flat knife to scrape the flame retardant white paint on the surface of the shielding coating. A 3.6m wide needle plate machine is used. Only the needle plate machine has this width. Drying method: natural gas direct combustion heating can better conduct heat and improve production efficiency. During coating, the temperature of the first section oven is controlled at 55℃, the temperature of the second section oven is controlled at 100℃, the temperature of the third and fourth sections oven is controlled at 120℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150℃, the temperature of the eighth section oven is controlled at 150℃, the temperature of the ninth section oven is controlled at 70℃, the vehicle speed is controlled at 16m / min, and the feeding weight is controlled at 55gsm / m 2 , coating thickness 250um,

[0073] Repeat the above process to apply another shielding coating on the surface;

[0074] S4 double-sided printing coating:

[0075] The raw materials of the double-sided printing coating include: 20g of FEVE water-based fluorocarbon resin, 15g of acrylic resin B, 28g of compound dispersion liquid, 1g of mildew inhibitor, 1g of cross-linking agent, 1g of anti-sticking agent, 1g of defoaming agent A, 1g of thickener, 1g of brightener, and 15g of deionized water;

[0076] The compound dispersion liquid includes: 18g of ultrafine silicon dioxide (20um), 1g of dispersant B, 1g of defoaming agent B, and 75g of deionized water;

[0077] The mildew preventer is a mixture of 4,5-dichloro-N-octyl-4-isothiazoline-3-one, iodopropynyl butyl carbamate, and n-butyl-1,2-benzisothiazolin-3-one, with a mass ratio of 17:5:10;

[0078] After the above raw materials are mixed evenly, the pH is adjusted to 7-8 with ammonia water to obtain a double-sided printing coating with a viscosity of 6000cps / 4#30R and a solid content of 34%;

[0079] The scraping method is adopted, and the scraper uses a 2mm flat knife to scrape the double-sided printed paint on the surface of the flame-retardant white coating. A 3.6m wide needle plate machine is used. Only the needle plate machine has this width. Drying method: natural gas direct combustion heating can better conduct heat and improve production efficiency. During coating, the temperature of the first section oven is controlled at 50℃, the temperature of the second section oven is controlled at 100℃, the temperature of the third and fourth sections oven is controlled at 120℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150℃, the temperature of the eighth section oven is controlled at 150℃, the temperature of the ninth section oven is controlled at 70℃, the vehicle speed is controlled at 18m / min, and the feeding weight is controlled at 15gsm / m 2 , coating thickness 150um,

[0080] Repeat the above process to apply another flame retardant white coating surface.

[0081] Example 3

[0082] A double spray cloth production process, the specific steps are as follows:

[0083] S1 substrate shaping:

[0084] The base material layer is 150D / 48F, black yarn, base material inch density 50*50, gram weight 140gsm / m 2 , thickness is 260um; 3.6m width needle plate machine is used, only needle plate machine has this width, drying method: natural gas direct combustion heating, can better conduct heat and improve production efficiency, during shaping, the temperature of the first section oven is controlled at 150℃, the temperature of the second section oven is controlled at 180℃, the temperature of the third and fourth sections oven is controlled at 200℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 200℃, the temperature of the eighth section oven is controlled at 200℃, the temperature of the ninth section oven is controlled at 120℃, and the speed is controlled at 33m / min;

[0085] S2 shielding coating:

[0086] The raw materials of the masking coating include: 45g of VAE emulsion (vinyl acetate-ethylene copolymer emulsion), 33g of compound light-shielding dispersion, 2g of defoamer A, 6g of carbon black, 2g of wetting agent, 2g of leveling agent, 2g of thickener, and 25g of deionized water.

[0087] Compound shading dispersion: titanium dioxide (pigment grade chloride rutile type with a fineness of 5 microns) 47g, defoamer B 3g, dispersant A 3g, deionized water 50g;

[0088] The above raw materials are mixed evenly, and the pH value is adjusted to between 7 and 8 with ammonia water to obtain a masking coating with a viscosity of 8000cps / 4#30R and a solid content of 51%;

[0089] The scraping method is adopted. The scraper uses a 2mm flat knife to scrape the masking paint on one side of the substrate. A 3.6m wide needle plate machine is used. Only the needle plate machine has this width. Drying method: natural gas direct combustion heating can better conduct heat and improve production efficiency. During coating, the temperature of the first section oven is controlled at 50℃, the temperature of the second section oven is controlled at 100℃, the temperature of the third and fourth sections oven is controlled at 120℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150℃, the temperature of the eighth section oven is controlled at 150℃, the temperature of the ninth section oven is controlled at 70℃, the vehicle speed is controlled at 18m / min, and the feeding weight is controlled at 20gsm / m 2 , coating thickness 150um, repeat the above process to coat the other side of the substrate;

[0090] S3 flame retardant white coating:

[0091] The raw materials of flame retardant white coating include: acrylic resin A35g, compound flame retardant 53g, defoamer A3g, wetting agent 2g, leveling agent 2g, thickener 2g, brightener 2g, deionized water 15g, compound flame retardant is: decabromodiphenylethane 45g, antimony trioxide 15g, hydroxy zinc stannate 6g, defoamer A2g, dispersant B3g, thickener 1g, deionized water 35g,

[0092] The above raw materials were mixed, and the pH value was adjusted to between 7 and 8 with ammonia water to obtain a flame retardant white coating with a solid content of 53% and 7500cps / 4#30.

[0093] The scraping method is adopted, and the scraper uses a 2mm flat knife to scrape the flame retardant white paint on the surface of the shielding coating. A 3.6m wide needle plate machine is used. Only the needle plate machine has this width. Drying method: natural gas direct combustion heating can better conduct heat and improve production efficiency. During coating, the temperature of the first section oven is controlled at 60℃, the temperature of the second section oven is controlled at 120℃, the temperature of the third and fourth sections oven is controlled at 150℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150℃, the temperature of the eighth section oven is controlled at 150℃, the temperature of the ninth section oven is controlled at 70℃, the vehicle speed is controlled at 15m / min, and the feeding weight is controlled at 60gsm / m 2 , coating thickness 300um,

[0094] Repeat the above process to apply another shielding coating on the surface;

[0095] S4 double-sided printing coating:

[0096] The raw materials of the double-sided printing coating include: 30g of FEVE water-based fluorocarbon resin, 20g of acrylic resin B, 33g of compound dispersion liquid, 2g of mildew inhibitor, 2g of cross-linking agent, 2g of anti-sticking agent, 2g of defoaming agent A2g, 2g of thickener, 2g of brightener, and 23g of deionized water;

[0097] The compound dispersion liquid includes: 22g of ultrafine silicon dioxide (20um), 3g of dispersant B, 2g of defoamer B, and 75g of deionized water;

[0098] The mildew preventer is a mixture of 4,5-dichloro-N-octyl-4-isothiazoline-3-one, iodopropynyl butyl carbamate, and n-butyl-1,2-benzisothiazolin-3-one, with a mass ratio of 13:7:10;

[0099] After the above raw materials are mixed evenly, the pH is adjusted to 7-8 with ammonia water to obtain a double-sided printing coating with a viscosity of 8000cps / 4#30R and a solid content of 36%;

[0100] The scraping method is adopted, and the scraper uses a 2mm flat knife to scrape the double-sided printed paint on the surface of the flame-retardant white coating. A 3.6m wide needle plate machine is used. Only the needle plate machine has this width. Drying method: natural gas direct combustion heating can better conduct heat and improve production efficiency. During coating, the temperature of the first section oven is controlled at 60℃, the temperature of the second section oven is controlled at 120℃, the temperature of the third and fourth sections oven is controlled at 150℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150℃, the temperature of the eighth section oven is controlled at 150℃, the temperature of the ninth section oven is controlled at 70℃, the vehicle speed is controlled at 15m / min, and the feeding weight is controlled at 10gsm / m 2 , coating thickness 100um,

[0101] Repeat the above process to apply another flame retardant white coating surface.

[0102] Comparative Example 1

[0103] The difference from Example 1 is that water-based acrylic acid (pure acrylic emulsion) is selected to replace the perfluorocarbon water-based acrylic resin, 20 g of the composite dispersion is added, and the rest is the same as Example 1.

[0104] Comparative Example 2

[0105] The difference from Example 1 is that methyl benzimidazole carbamate (carbendazim) is selected to replace the mildew inhibitor, and the rest is the same as Example 1.

[0106] Comparative Example 3

[0107] The difference from Example 1 is that hexamethoxymethyl melamine resin is selected to replace trimethylolpropane trimethacrylate, and the rest is the same as Example 1.

[0108] Comparative Example 4

[0109] The difference from Example 1 is that polyethylene wax (10-30 um) is selected to replace the aluminum orthosilicate nanoparticles, and the rest is the same as Example 1.

[0110] Comparative Example 5 (Example 4)

[0111] The difference from Example 1 is that 100D / 48F, black yarn, base material inch density 60*50, gram weight 100gsm / m 2 , thickness is 230um, the substrate layer is replaced, and the rest is the same as Example 1.

[0112] Test example

[0113] In the dual-spray cloths of Example 1, Comparative Examples 1-3 and common commercially available competitive products, weak solvent ink (Epson weak solvent ink) was used, 10 passes were printed, and dried to obtain inkjet products.

[0114] 1. Adhesion test

[0115] The double spray cloths prepared in Example 1 and Comparative Example 4 and common commercially available competitive products were tested for anti-adhesion properties according to the FZ / T 01063-2008 test method. The results showed that the product of Example 1 had no adhesion, the product of Comparative Example 4 had adhesion, and the common commercially available competitive products had adhesion.

[0116] The double-spray cloth prepared in Example 1 will not stick to both sides within 2 years, the double-spray cloth prepared in Comparative Example 4 will not stick to both sides within 1 year, and the common commercially available product will not stick to both sides within 6 months.

[0117] Through the above comparison, it can be clearly found that compared with the product of Comparative Example 4 and ordinary commercially available products, the anti-sticking effect of Example 1 is significantly improved and the storage time is longer.

[0118] 2. Tear strength test

[0119] According to the GB / T 529-2008 test method, the double-sprayed cloth prepared in Example 1 and Comparative Example 5 has a tear strength of 100 N and a tear strength of 50 N. The mechanical properties of the product in Example 1 are significantly better than those of the product in Comparative Example 5, and the product has a wider range of application scenarios.

[0120] 3. Drying speed test

[0121] The double-spray cloth of Example 1 needs to be dried for 3 minutes after printing, the double-spray cloth of Comparative Example 1 needs to be dried for 10 minutes after printing, and the ordinary commercially available competitive product needs to be dried for 13 minutes after printing.

[0122] After printing, the drying time of the double-spray cloth of Example 1 is significantly shortened compared with the double-spray cloth of Comparative Example 1 and ordinary commercially available competitive products, which effectively improves production efficiency and capacity.

[0123] 4. Anti-mildew test

[0124] The inkjet products prepared from Example 1, Comparative Example 2 and common commercially available competing products were tested for mildew resistance according to the testing method of GB / T 24346. After the test, the mildew resistance level of the inkjet product of Example 1 was level 0, the mildew resistance level of the inkjet product of Comparative Example 2 was level 3, and the mildew resistance level of the inkjet product of common commercially available competing products was level 4.

[0125] The mildew resistance of the product in Example 1 is significantly better than that of the product in Example 2 and the ordinary commercially available competitive products, and the use time of the inkjet product in Example 1 is longer. In particular, in the rainy season in the south, in the humid weather environment, the product of the present invention is not easy to mold and has a long use time.

[0126] 5. Scrub test

[0127] The inkjet products obtained by Example 1, Comparative Example 3 and common commercial competitive products were selected, and three 10*10cm samples were selected respectively, and 75% alcohol wet wipes were used for scrubbing. After 10 minutes of scrubbing, the coating was observed to see whether it swelled. After testing, the inkjet product of Example 1 can be scrubbed 10 times, the inkjet product of Comparative Example 3 can only be scrubbed 5 times, and the inkjet product of the common commercial competitive product can be scrubbed once.

[0128] The product of Example 1 can be scrubbed more times than that of Comparative Example 3 and common commercial products. The double-spray cloth prepared by the present invention has good solvent resistance and can be scrubbed.

[0129] 6. Curl test

[0130] The inkjet products prepared by the double-spray cloth of Example 1 and the common commercial competitive products were hung after drying. The periphery of the product of Example 1 was flat and had no curling phenomenon, while the periphery of the common commercial competitive products was curled. Figure 2 As shown, the left side is the product of Example 1, and the right side is a common commercially available competitive product. Figure 2 It can be clearly seen that after the product of the present invention is hung, the periphery is flat and not curled, while ordinary products on the market are prone to curling after hanging, which has a poor visual effect and affects the use effect. The present invention has very obvious progress compared with ordinary commercially available competing products, improves the user experience, has better visual effects, and has higher market promotion value.

[0131] Through the above-mentioned tests, it can be found by comparison that the product of the present invention has better anti-adhesion effect, mildew resistance level and mechanical properties than the control examples and ordinary commercially available competing products, shortens the printing drying time, improves production efficiency, can be scrubbed, is not easy to curl (curl) after being hung at high altitude, improves user satisfaction, and has great promotion value.

[0132] The present invention provides a double-spray cloth and a manufacturing process thereof, the process is simple and easy to operate, the prepared double-spray cloth is flat (not curled), non-sticky, has excellent mechanical properties, good flame retardancy, and is not easy to mold, effectively prolongs the storage and use time of the double-spray cloth, expands the application scenarios, and shortens the drying time after printing, improves production efficiency, effectively improves production capacity, improves benefits, is solvent-resistant, scrubbable, can be suspended in the air, and does not curl, thereby improving the user experience, improving the visual effect, and improving the user satisfaction, and has a high market promotion value.

[0133] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A double-spray cloth, comprising a substrate layer, a shielding coating, a flame-retardant white coating, and a double-sided printing coating, characterized in that: The raw materials of the double-sided printing coating include 20 to 30 parts of water-based fluorocarbon resin, 1 to 2 parts of mildewproof agent, 1 to 2 parts of cross-linking agent and 1 to 2 parts of anti-sticking agent by weight. The water-based fluorocarbon resin is FEVE water-based fluorocarbon resin; The mildew preventer is a mixture of any proportion of 4,5-dichloro-N-octyl-4-isothiazoline-3-one, iodopropynyl butyl carbamate, and n-butyl-1,2-benzisothiazolin-3-one; The mass ratio of the 4,5-dichloro-N-octyl-4-isothiazoline-3-one, iodopropynyl butylcarbamate, and n-butyl-1,2-benzisothiazolin-3-one is 13-17:5-7:10; The cross-linking agent is trimethylolpropane trimethacrylate, and the anti-sticking agent is aluminum silicate; The base material layer is 150D / 48F, black yarn, base material inch density 50*50, gram weight 140gsm / m 2 , 220~260um.

2. A double spray cloth according to claim 1, characterized in that: The shielding coating is prepared from a shielding paint, and the shielding paint raw materials include, by weight: 35-45 parts of VAE emulsion, 26-33 parts of compounded light-shielding dispersion, 1-2 parts of defoamer A, 4-6 parts of carbon black, 1-2 parts of wetting agent, 1-2 parts of leveling agent, 1-2 parts of thickener, and 15-25 parts of deionized water. The components in the composite light-shielding dispersion include: titanium dioxide, defoamer B, dispersant A, and deionized water, and the mass ratio thereof is 42-47:2-3:2-3:50; After the above raw materials are mixed evenly, the pH value is adjusted to between 7 and 8 with ammonia water to obtain a shielding coating with a viscosity of 6000 to 8000 cps / 4#30R and a solid content of 49 to 51%; Defoamer A is a copolymer of ethylene oxide and propylene oxide, defoamer B is a polysiloxane defoamer prepared from polyether and dodecyl methacrylate modified silicone oil, and dispersant A is a sodium polyacrylate (co)polymer.

3. A double spray cloth according to claim 1, characterized in that: The flame retardant white coating is prepared from a flame retardant white paint, and the flame retardant white paint raw materials include, by weight: 25-35 parts of acrylic resin A, 48-53 parts of compound flame retardant, 1-3 parts of defoamer A, 1-2 parts of wetting agent, 1-2 parts of leveling agent, 1-2 parts of thickener, 1-3 parts of brightener, and 5-15 parts of deionized water. The components of the compound flame retardant include: decabromodiphenylethane, antimony trioxide, zinc hydroxystannate, defoamer A, dispersant B, thickener, deionized water, and the mass ratio thereof is 40-45:10-15:4-6:1-2:1-3:1-2:

35. After the above raw materials are evenly mixed, the pH value is adjusted to between 7 and 8 with ammonia water to obtain a flame retardant white coating with a viscosity of 6000-8000cps / 4#30R and a solid content of 51-53%. Acrylic resin A is pure acrylic resin with a Tg value of -25°C, defoamer A is a copolymer of ethylene oxide and propylene oxide, and dispersant B is tristyrylphenol polyoxyethylene ether phosphate.

4. A double spray cloth according to claim 1, characterized in that: The double-sided printing coating is prepared from a double-sided printing coating, and the raw materials of the double-sided printing coating include, by weight: 20 to 30 parts of water-based fluorocarbon resin, 15 to 20 parts of acrylic resin B, 28 to 33 parts of compound dispersion liquid, 1 to 2 parts of mildewproof agent, 1 to 2 parts of cross-linking agent, 1 to 2 parts of anti-adhesive agent, 1 to 2 parts of defoaming agent A, 1 to 2 parts of thickener, 1 to 2 parts of brightener, and 15 to 23 parts of deionized water; The components of the composite dispersion include: silicon dioxide, dispersant B, defoamer B, and deionized water, and the mass ratio thereof is 18-22:1-3:1-2:75; After the above raw materials are mixed evenly, the pH is adjusted to 7-8 with ammonia water to obtain a double-sided printing coating with a viscosity of 6000-8000cps / 4#30R and a solid content of 34-36%; Acrylic resin B is pure acrylic resin with a Tg value of 15°C, defoamer A is a copolymer of ethylene oxide and propylene oxide, dispersant B is tristyrylphenol polyoxyethylene ether phosphate, and defoamer B is a polysiloxane defoamer prepared from polyether and dodecyl methacrylate modified silicone oil.

5. A double-spraying fabric production process according to any one of claims 1 to 4, characterized in that: The steps include: S1 substrate shaping: a 3.6m wide needle plate machine is used. During shaping, the temperature of the first section oven is controlled at 120-150℃, the temperature of the second section oven is controlled at 150-180℃, the temperature of the third and fourth sections ovens is controlled at 180-200℃, the temperature of the fifth, sixth and seventh sections ovens is controlled at 200-205℃, the temperature of the eighth section oven is controlled at 200-205℃, the temperature of the ninth section oven is controlled at 120-125℃, and the vehicle speed is controlled at 30-33m / min; S2 shielding coating: scraping method is adopted, and the scraper is a 2mm flat knife. The shielding coating is scraped on one side of the substrate. A 3.6m wide needle plate machine is used. During coating, the temperature of the first section oven is controlled at 50-60℃, the temperature of the second section oven is controlled at 100-120℃, the temperature of the third and fourth sections ovens is controlled at 120-150℃, the temperature of the fifth, sixth and seventh sections ovens is controlled at 150-155℃, the temperature of the eighth section oven is controlled at 150-155℃, the temperature of the ninth section oven is controlled at 70-75℃, the vehicle speed is controlled at 15-18m / min, and the feeding weight is controlled at 20-30gsm / m 2 , coating thickness 100 ~ 200um, repeat the above process, and coat the other side of the substrate; S3 flame retardant white coating: scraping method is adopted, and the scraper is a 2mm flat knife. The flame retardant white coating is scraped on the surface of the shielding coating. A 3.6m wide needle plate machine is used. During coating, the temperature of the first section oven is controlled at 50-60℃, the temperature of the second section oven is controlled at 100-120℃, the temperature of the third and fourth sections oven is controlled at 120-150℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150-155℃, the temperature of the eighth section oven is controlled at 150-155℃, the temperature of the ninth section oven is controlled at 70-75℃, the vehicle speed is controlled at 15-18m / min, and the feeding weight is controlled at 50-60gsm / m 2 , coating thickness 200 ~ 300um, repeat the above process, and apply another shielding coating surface; S4 double-sided printing coating: scraping method is adopted, and the scraper adopts 2mm flat knife to scrape the double-sided printing coating on the surface of the flame retardant white coating. A 3.6m wide needle plate machine is used. During coating, the temperature of the first section oven is controlled at 50-60℃, the temperature of the second section oven is controlled at 100-120℃, the temperature of the third and fourth sections oven is controlled at 120-150℃, the temperature of the fifth, sixth and seventh sections oven is controlled at 150-155℃, the temperature of the eighth section oven is controlled at 150-155℃, the temperature of the ninth section oven is controlled at 70-75℃, the vehicle speed is controlled at 15-18m / min, and the feeding weight is controlled at 10-15gsm / m 2 , coating thickness 100 ~ 150um, repeat the above process, and apply another flame retardant white coating surface.

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