Before the textile coating, it is necessary to pretreat the textile surface to ensure the adhesion and quality of the coating. Common surface treatment methods are: cleaning, degreasing, polishing and so on. Cleaning can be done with hot water or solvents, degreasing can be done with alkaline or acid degreasing agents, and polishing is done by mechanical removal of surface hair. The choice of coatings should be selected according to the material, use and appearance requirements of textiles. Commonly used coatings are: polyurethane, acrylic, carbon fiber and so on. The coating method is selected according to the thickness and uniformity of the coating. The commonly used coating methods are: dipping, rolling coating, spraying, scraping coating and so on. Among them, the scraping coating method is more suitable for the coating with higher thickness requirements. Drying method is also one of the important factors affecting the quality of the coating. Commonly used drying methods are: natural drying, drying room, hot air drying and so on. Among them, hot air drying can quickly complete the drying process, but it will affect the shape and appearance of the textile, which needs attention. After the coating, it is necessary to cut, sew, iron and other post-processing to make the appearance and use of the textile to achieve the ideal state In short, the textile coating process needs to consider a number of factors, including surface treatment, paint selection, coating method, drying method and post-treatment.

There are several main reasons for water-based emulsion breaking: 1.Large temperature changes, water-based emulsion is easy to separate into water phase and oil phase at high temperature, and easy to crystallize at low temperature. 2.The selection of emulsifier is improper, and the type and dosage of emulsifier are different, which has a great impact on the stability of emulsification. The choice of emulsifier should be based on the nature of the emulsifying system. 3.Emulsion particles are too large, particle size and stability are important factors affecting emulsion demulsification, when the particle size is too large, easy to appear demulsification phenomenon. 4.Water-based emulsion preparation is improper, such as uneven mixing, emulsification time is too long. Second, measures to prevent water-based emulsion breaking In order to prevent water-based emulsion breaking, the following measures can be taken: 1.Select the right emulsifier, and select the right emulsifier according to the nature of the emulsifying system. 2.Control the particle size of water-based emulsion, the particle size is generally controlled between 0.1 and 1 micron, and the particle size is too large to directly affect the stability. 3.Avoid high and low temperature environments and store at room temperature. 4.In the preparation process, we should strictly follow the process requirements, such as selecting appropriate emulsifier, improving the particle distribution of emulsion, controlling the emulsion time, etc., which can improve the stability of emulsion. In short, the phenomenon of water-based emulsion breaking is a common problem in the process of emulsion storage and use, but as long as the reasonable formula and operation skills are mastered, the impact of emulsion breaking can be effectively prevented. Sinograce Chemical production of water-based emulsion, including water based polyurethane, water based acrylic and other coatings and paint, welcome to consult

First, water-based lotion Aqueous emulsion is a colloidal dispersion system with water as the continuous phase and oil or other non-aqueous substances as the dispersing phase. It is a stable dispersion system formed by tiny oil droplets coated with surfactants. Water-based emulsion has many significant advantages, such as its low viscosity, easy to brush, easy to clean, non-toxic and harmless. Therefore, it has been widely used in various industrial fields, such as coatings, textiles, plastics and so on. Second, dispersion Dispersion is a colloidal dispersion system consisting of solid or liquid particles dispersed in liquid. Compared with water-based emulsions, the dispersion has a weak interaction force between particles, so it is easy to disperse and not easy to gather. Dispersions have a wide range of applications, such as pharmaceutical preparation of oral suspensions or sustained-release agents; In the preparation of pigments or automotive paints, dispersions can be used as thickeners and stabilizers. Third, the performance difference between water-based emulsion and dispersion 1.Stability The stability of water-based emulsions is higher than that of dispersions. Because the attraction between particles in water-based coatings is greater, it is easy to coagulate and precipitate. However, the particles in the dispersion have less interaction force and are easy to aggregate and precipitate. 2.Water resistance Water-based emulsion has better water resistance, and can form emulsion in water, without stratification; Dispersions generally do not have water resistance. 3.Transparency The transparency of dispersions is generally higher than that of water-based emulsions, which makes dispersions have a wide range of application prospects. However, due to the dispersion of oil droplets in the emulsion, water-based emulsions tend to have better covering power than dispersive emulsions. 4.Economy In the case of the same performance, the cost of the dispersion is lower than that of the water-based emulsion, because the preparation of the dispersion system does not require surfactants and other special additives. In short, water-based emulsions and dispersions have their special properties and advantages. According to the actual needs and application scenarios, it is particularly important to choose a suitable decentralized system.

In the process of UV flexographic printing, the viscosity of the ink is one of the key factors that affect the printing quality and effect. Choosing the right viscosity UV flexographic ink is crucial to ensure printing quality and efficiency. When adjusting viscosity, it is usually necessary to consider many factors such as printing equipment, printing materials, image details and the expected printing effect. The viscosity of UV flexographic inks is usually between 200 and 600 centipoise (cps). This range helps to achieve good flow and transfer performance during flexographic printing. The exact viscosity value will vary depending on the brand and application needs, so referring to the ink manufacturer's technical data sheet is an effective way to obtain an accurate viscosity value. When we cannot obtain data from the ink manufacturer, we need to detect the viscosity of the ink through some technical means. So what effect does the viscosity of ink have on printing? Below we compare high viscosity and low viscosity inks from various aspects: 1.Printing quality The viscosity of the ink directly affects the printing quality: High viscosity: May lead to poor transfer of ink between the plate and the substrate, resulting in defects such as blurred images or ink accumulation. Low viscosity: May lead to excessive ink flow, resulting in uneven printing, color inconsistency or leakage problems. 2.Dot reproduction Viscosity affects dot reproduction:High viscosity: may cause the reproduction ability of small dots to decline, dot increase or deformation, affecting the image fineness. Low viscosity: It is easier to reproduce small dots, but too low viscosity can cause the printed image to be unclear. 3.Color saturation and brightness Viscosity has a significant effect on color performance: High viscosity: Usually provides high color saturation and brightness because the high viscosity ensures that sufficient ink volume is transferred to the substrate. Low viscosity: May lead to insufficient color saturation and brightness, dull printing effect. 4.Drying rateViscosity affects the drying speed of the ink: High viscosity: Longer UV curing times may be required because of the higher concentrations of photoinitiators and resins in high viscosity inks and the slower curing process. Low viscosity: usually the drying speed is faster, but too low viscosity may lead to too thin ink layer, affecting the curing effect. 5.Adaptability of printing equipment Viscosity affects the adaptability of ink to printing equipment: High viscosity: It may be necessary to adjust the Settings of the printing equipment, such as greater pressure or speed, to ensure uniform ink transfer. Low viscosity: It is generally easier to adapt to various printing equipment, but it still needs to be adjusted appropriately according to the specific situation.