• Feb 16, 2022 Ten Application Fields Of Vinyl Resin
    Vinyl resin has relatively stable chemical properties, and has excellent insulation and corrosion resistance. We would like to share some applications to you as follows: 1. GRP pipes and storage tanks All kinds of glass fiber reinforced plastic products such as cans, pipes and containers with anti-corrosion requirements. 2. Flue gas desulfurization All coal-fired thermal power plants have FRP chimneys for flue gas desulfurization, which are typical applications of vinyl resin. 3. Iron and Steel Industry Vinyl resin is used for maintenance coatings. It is used in the pickling section area, waste acid tank and area of stainless steel cold rolling and hot rolling production line, FRP grid, cover plate, dilute acid tank, waste water tank, etc. Office. 4. Chemical industry Used in lining of titanium dioxide plant, fertilizer plant, phosphate plant and other equipment, acid-resistant bricks and ground granite joints. 5. Petrochemical industry, papermaking, printing and dyeing industry Vinyl resin is used for storage tank lining FRP, wastewater tank lining, pipeline coating anticorrosion, wall surface, steel structure anticorrosion, etc. 6. Overall Mortar Floor One is the overall anti-corrosion floor that is resistant to acid, alkali and salt; the other is the anti-static, dust-proof, food-grade clean floor. 7. Chemical fiber and textile industry Vinyl resin is used in equipment linings, wastewater ponds, pipeline coatings, etc. 8. Solvent resistance and flame retardant Vinyl resin is suitable for the requirements of solvent resistance in most occasions, and is suitable for flame retardant requirements of buildings below B1. 9. Wind power blades Vinyl resin can replace epoxy resin because of its good toughness and fatigue resistance. 10. Electrolytic cell (pool), electroplating In the non-ferrous metal smelters, the most commonly used electrolytic copper, electrolytic nickel pools and tanks are often made of vinyl resin to make resin concrete integrated electrolytic tanks, or as the first choice for glass fiber reinforced plastic lined resin, and are used in workshop floor, FRP grille, cover Board and other places. Vinyl resin is often used in the plating tank lining and floor of the plating workshop.
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  • Jan 28, 2022 Lunar New Year 2022 Holiday Notice
    Dear All Partners and Customers, Lunar New Year is on the way and it has been an amazing year working with you. In the Year of the Tiger, Sunman would like to wish all our valued patrons and partners – with a Tiger's ferocity and grit – to achieve their vaulting ambitions and soar to new heights. Please be informed that our office will be closed from 29th Jan.2022 to 6th Feb.2022 for Lunar New Year holiday. Our business operation will back to normal on Monday 7th Feb.2022 Happy New Year 2022! Best regards, Sino Sunman
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  • Jan 20, 2022 General Information about Screen Printing Plastisol Inks
    Plastisol ink is a PVC (polyvinyl chloride) based system that essentially contains no solvent at all. Along with UV ink used in graphic screen printing, it is referred to as a 100% solid ink system. Plastisol is a thermoplastic ink in that it is necessary to heat the printed ink film to a temperature high enough to cause the molecules of PVC resin and plasticizer to cross-link and thereby solidify, or cure. The temperature at which most plastisol for textile printing cures at is in the range of 149 °C to 166 °C (300 °F to 330°F). Plastisol ink can be printed on many items that can withstand the heat required to cure the ink and is porous enough to permit good ink adhesion. They do not dye the threads of a fabric like traditional dye material. Plastisol screen printing ink wraps around the fibers and makes a mechanical bond with the fabric. Screen printing plastisols will not adhere to non-porous substrates such as plastic, metal, wood and glass. They also will not adhere to water-proof nylon material without adding a bonding agent/catalyst. Plastisol ink is made up PVC particles suspended in a liquid plasticizer, it is very durable, flexible, and is commonly used in apparel printing. Plastisol is thick and opaque and it can be mixed easily to create just about any color imaginable. With plastisol ink, we can create special effects like suede, glow-in-the-dark, glitter, shimmer, or metallic. Plastisol is most commonly used on dark-colored fabrics, and it is ideal when printing designs that are less detailed and very colorful. The four major components that go into the formulation of Plastisol inks are (1)Polyvinyl Chloride (PVC)  (2)Plasticizers  (3)Fillers  (4) pigments. Additives A word of caution about ink additives, it’s easy to upset the chemical balance of plastisol inks by using the wrong additives, or by adding too much of an additive – even if it is the correct type of additive. The result can be t-shirt ink that never cures properly, a problem that may not be discovered until your customer washes a shirt and the design falls (i.e. color lose, adhesion or cracking). To avoid this problem, use only those additives recommended by the manufacturer, and read the Technical Data Sheets for each ink and additive, and carefully follow their instructions. Never add mineral spirits to plastisol ink. Although mineral spirits will make it easier to print at first, soon the ink will become even stiffer and harder to print than before. Also, it is possible that mineral spirits will prevent the ink from curing properly. Ink Storage Store plastisol inks at room temperature. Prolonged exposure to temperatures above 90º F (32º C) can cause the ink to start to cure while it's still in the container.
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  • Jan 11, 2022 What factors affect the printing products of gravure printing don't dry?
    The gravure printing has a thick ink layer, so the problem of poor drying always exists. The printing feature of gravure printing is wet and wet. Although there is a long drying path, the ink of the previous color group is not dry when the gravure is stacked, but a film is formed on the surface of the ink layer to prevent the next color. The inks of the group reverse the stickiness of the ink of the previous color when the ink is stacked. We would like to tell you the following summarizes the gravure printing products do not dry reasons for your reference; 1. The gravure mesh is deep, sometimes the depth reaches 60μm, the amount of ink is large, and it will be difficult to dry. 2. In order to ensure the transfer of high-gloss small dots, a slow-drying agent must be added in the gravure process, which will also affect the drying effect of the ink. 3. The comprehensive balance of mixed solvents is not easy to grasp, resulting in a large amount of slow-drying agent retention. 4. In some inner printing processes, the last color is printed with white ink, and then it is rolled up. The distance between the drying and the winding station is too short, and the drying is difficult. In addition, the white ink base requires the ink to have good hiding power, and can only thicken the ink layer. In general, the amount of white ink is the largest of all colors. 5. During the printing of pe gravure composite film, the temperature of the drying device must not be too high, and the drying channel should not be too long, otherwise the film will be stretched and deformed, which will affect the overprint accuracy and product length. The commonly used method is to use low temperature and large air volume, and adopt the volatilization method in the drying process to abandon evaporation. 6. Dependence of solvent volatility on environmental conditions. When the ambient air pressure is relatively low, it is difficult to effectively control the drying efficiency with a mechanical exhaust device. 7. There is a boundary layer between the ink layer on the surface of the print and the contact surface with the atmosphere (foreign counterparts call it "Boundarylayer", some people translate it as "mirror film"). This layer contains hot air and solvent vapor. Mixture, the temperature is higher. When the ink is dried under the action of high temperature, the liquid solvent therein will evaporate and move to the boundary layer. If there is no solvent in the boundary layer, the solvent vapor is easily transferred to the atmosphere. However, as the concentration of the solvent vapor in the boundary layer continues to increase, the evaporation ratio of the solvent will decrease. When the solvent vapor in the boundary layer tends to be saturated, the evaporation process will stop. The traditional gravure drying process does not pay attention to the existence of the boundary layer and ignores the role of evaporation in drying. Although the industry has made some improvements to the curv...
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