Water based polyurethane adhesive is a kind of high-grade adhesive, with excellent flexibility, impact resistance, chemical resistance and wear resistance, the most important is its low temperature resistance.It has adsorption and chemical bonding effect on many kinds of materials. It can not only bond porous materials, but also bond smooth surface materials. It is widely used. Polyurethane adhesives have strong adhesion, most water based polyurethane adhesives do not contain NCO group, but there are ammonia ester bond urea bond ether bond ionic bond, so the adhesion of a variety of substrates is strong, good affinity, because waterborne polyurethane contains carboxyl hydroxyl and other active groups, under appropriate conditions can form crosslinking, improve adhesion.The viscosity of waterborne polyurethane is generally adjusted by water-soluble thickener and water, which is easy to operate and easy to clean up the residual glue. Can be mixed with a variety of water-based resins, conducive to improve performance and reduce costs, but pay attention to ionic properties and acid alkaline, to prevent condensation. In addition to the added polymer thickener, the main factors affecting the viscosity of water based polyurethane adhesives are ion charge particle size and so on.The viscosity of water-based adhesives is lower than that of solvent-based adhesives with the same solid content.Due to the poor volatility of water than organic solvents, waterborne polyurethane adhesives dry slowly, and due to the large surface tension of water, the wetting ability of surface hydrophobic substrate is poor, when most of the water is not volatilized into the air from the adhesive layer or absorbed by porous substrate heating and drying, it is not easy to get a continuous adhesive layer.Because most waterborne polyurethane adhesives are made of hydrophilic polyurethane as the main solid component, and sometimes also contain water-soluble polymer thickener adhesives, after drying the film, if there is not a certain degree of crosslinking, the water resistance is not good.In recent years, a great deal of research has been carried out and great progress has been made on problems such as slow drying speed of waterborne polyurethane adhesives, poor wettability of non-polar substrates, low initial viscosity and poor water resistance.The results show that if the solid content is increased to more than 50%, the drying speed is similar to that of common solvent-based polyurethane adhesive at the drying temperature of 40~60.Blends with other emulsions (such as EVA acrylate emulsion, etc.) to form interpenetrating network or graft structure, which can improve the initial viscosity and bonding performance, and reduce the cost. Crosslinking method can improve water resistance and heat resistance.Polyurethane adhesives have the advantages of adjustable softness and hardness, low temperature resistance, good flexibility, high bonding strength and so on. They can bond a variety o...

Water - based ink is composed of adhesives pigment additives and other substances such as uniform slurry material,Binders provide ink with the necessary transfer properties, pigments give ink color. Water-based ink linker is mainly divided into two types: water dilution and water dispersion.The former can be used in many types of resin, such as maleic acid resin lac maleic acid resin modified shellac ulatan water-soluble acrylic resin and water-based amino resin, etc.The water-dispersed linker is obtained by polymerization of emulsified monomer in water. It is a two-phase system, in which the oil phase is dispersed in the water phase in granular form. Although it can not be dissolved by water, it can be diluted by water, so it can also be considered as oil-in-water emulsion. 1.water-based ink Water-based ink, ink stability, bright color water-based ink by water-based resin deployment, soluble in water, water dilution, the advantage is no organic solvents, reduce solvent volatilizing, can prevent air pollution, does not affect human health, not easy to burn, belongs to environmental protection ink.Waterborne ink is important, cheap, good post-press adhesion, fast drying, water resistance is usually used in food, drugs, beverages and other industries, packaging and printing industry is also widely used. 2.oil-based ink oil-based ink, solvent-based ink, insoluble in water, soluble in organic solvents.oil-based ink can be diluted with organic solvent, can be printed on absorption surface and non-absorption surface, not easy to fade after printing.Oil-based ink is characterized by large ink viscosity, and fast dry water resistance soft light resistance is quite good.When using ink is more economical, effective cost saving oil-based ink, but also environmentally friendly oil-based ink, without machine solution can be sprayed.It is mainly used on the surface of metal, plastic, wood, aluminum foil boxes and building materials. Anhui Sinograce Chemical Co., Ltd.(Sinograce Chemical) is mainly engaged in the business of chemical products,such as printing ink.Sinograce Chemical is mainly engaged in the business of screen printing ink and other product series.Good materials, advanced production technology, and fine manufacturing techniques are used in the production of chemical liquids. It is of fine workmanship and good quality and is well sold in the domestic market.This is our mailbox sales@sinogracechem.com, welcome to consult.

What is nano coating? What are the advantages? Nano paint is a new high-tech coating, is the nano raw materials and coating material, in addition to add silicon oxide single slurry nano technology emulsion nano technology pesticides fungicide and other modifiers.The metope paint with relative tradition not only lacquer face is meticulous and extraordinary, and price also is cost-effective.The metope paint with relative tradition not only lacquer face is meticulous and extraordinary, and price also is cost-effective What are the advantages of nano coatings? 1.Self-cleaning effect Because of the increased activity of the coating surface, the nano-coating can improve its chemical catalytic reaction and photocatalytic reaction, and make the coating self-cleaning under the effect of ULTRAVIOLET light and CO2. 2. scratch resistant Nano coating surface activity and demulsification material fusion, can greatly increase the compressive strength of the coating, so the coating has a good scratch resistance, in addition, nano coating surface modified material has the characteristics of moisture-proof and oil resistance, whether used for the inner wall, or the wall, can improve the wall pollution resistance and weather resistance 3. Protection against electromagnetic radiation The coating with particle size less than 100nm can absorb and transmit Y radiation, so it can improve the ability of coating against electromagnetic radiation 4. high paint gloss and high transmittance If the nano coating is used for finishing paint, not only can improve the adhesion of finish paint and plate, but also can improve the impact toughness, and because of the design of nano coating, after painting can produce very little film layer on the surface, so that the transmittance is greatly improved, more than 70%.Application at home not only more spacious line of sight, application is also more convenient and fast. 5. Anti-bacteria, anti-aging Nano coating silicon dioxide, not only can make the wall more resistant to cleaning, but also can make the wall paint weather resistance and aging resistance are greatly improved.Nano zinc oxide in the natural nano coating also has the effect of shielding uv light absorption infrared induction sterilization and anti-virus.This is nano coating why so many customers hold the reason. 6. Energy saving, environmental protection, health and safety Nano coating has thermal insulation effect, can adjust the temperature difference between inside and outside of the room, thus can exceed the effect of energy saving.Reghana material coating belongs to water-soluble coating, so it is not easy to contain indoor formaldehyde lead and other harmful substances, very low carbon environmental protection. Sinograce chemical produces nano coating and Super hydrophobic coating, welcome to consult, contact email is sales@sinogracechem.com.

When waterborne polyurethane is used as adhesive, it must be mixed generally. Based on waterborne polyurethane, crosslinking agent, thickening agent, filler, plasticizer, pigment and other additives can be added. Other types of waterborne resin and water can be added.In order to obtain higher resistance to water Heat resistance and bonding strength, at present a lot of waterborne polyurethane systems have been popular use of crosslinking agent, a two-component system, and this single component solvent (volatile) polyurethane adhesive system is similar to the sizing methods of waterborne polyurethane adhesive and solvent adhesive basic same, such as manual brush mechanical roller coating, etc.When spraying, the particle size and viscosity of emulsion should not be too large. Adhesive is the key factor affecting the quality and performance of composite film, adhesive composite packaging film using the base material has plastic aluminum foil, and plastic is divided into many types, to these different surface characteristics of the film together, adhesive must have the ability to bond two different film materials at the same time.The main reason for the popularity of plastic-based composites is their lightness and flexibility.This in addition to its own to be flexible and foldable, the adhesive itself should also have this property if the hard film is brittle and not foldable, it loses the meaning of packaging. Heat resistance Many food packages are subjected to high temperatures (180~220) during manufacturing operations ), for example, heat sealing bag, packaged food by high temperature sterilization and cooking food, which not only requires a variety of substrate film to withstand the test of high temperature, the adhesive used can also withstand the test of high temperature, otherwise, after high temperature treatment of the film layered peel, is not a composite packaging film.This must be carefully considered in the selection of adhesive cold resistance many food packaging to low temperature refrigeration or cryopreservation, which requires the packaging film itself can withstand low temperature.If the adhesive becomes hard and brittle under low temperature, it does not meet the requirements of the phenomenon of delamination and degumming, dielectric resistance food itself is a very complex substance, containing oil salt wine, spicy spices, and even acetic acid citric acid lactic acid sugar sulfide oxide.In the face of these complex ingredients, packaging and then to the high and low temperature test of processing and long-term storage, to maintain the packing film is perfect, in addition to the base material good medium erosion resistance of the film itself, the stability of the adhesive is very important also, need to be able to resist a variety of media, otherwise it will cause composite film layer stripping, lost package.The safety and health of food packaging compound film is to protect the packaging of the thing is direct entry, in order to...