Differentiated by medium Waterborne polyurethane: A new type of polyurethane system using water instead of organic solvent as dispersion medium, also known as water dispersed polyurethane, water polyurethane or water based polyurethane. Oily polyurethane: polyurethane system with organic solvent as dispersion medium, polyurethane system with thermoplastic linear structure. Distinguish by appearance Waterborne polyurethane is mostly opalescent transparent, blue translucent. Oil-based polyurethane is transparent. According to environmental protection distinction Waterborne polyurethane is based on water as a dispersion medium, VOC (volatile organic compounds) content is very low, minimal environmental pollution; Oily polyurethane uses organic solvent (toluene, xylene, industrial alcohol, etc.) as dispersion medium.Toluene and xylene are important items of product environmental monitoring. Oil-based polyurethane is not environmentally friendly compared with water-based polyurethane in the production, use and waste treatment process. There is a strong pungent smell and organic gas volatilization.

water-base adhesive With the development of society, the quality of glue has been pushed to a high point, which also led to the development of water-based glue. At present, the environmental protection industry is in a stage of rapid development. People pay more and more attention to health and environmental protection issues. The chemical glue industry is also in a stage of rapid change, and water based adhesive gradually begins to become the mainstream of the market. Let's briefly talk about the characteristics of water-based glue: Environment protecting The water-based adhesive is made of high polymer, water-soluble resin and other main raw materials, with water as the solvent. It is non-flammable and easy to clean up. It conforms to FDA, SGS, ROHS and other certifications. Waterborne adhesive can be safely used for packaging of food, medicine, alcohol, tobacco, children's toys and so on. The machine can be cleaned with water after using glue, not only to improve the production environment, but also to ensure the health of production personnel. Safe and reliable In practical application, some packaging and printing enterprises lack sufficient understanding of water-based adhesives, which causes some quality problems. The preparation method and production process of different types of water-based adhesives (semi-oil semi-water and pure water) are different, that is, the application index is different. The most important application indexes of water-based adhesives in packaging and printing industry include bond strength, high/low temperature resistance, moisture resistance and adhesion. Some packaging and printing enterprises reflect: Some water-based adhesives will be degumming soon after gluing; The viscosity is unstable, sometimes the bond is firm, sometimes it is not on; It works well in hot weather, but it doesn't work in cold weather. In fact, these defects occur because of the above four application indicators are not up to standard. And water-based glue, broken paper fiber in more than 90%, strong adhesion, good temperature resistance [at high temperature (60℃), low temperature (-20℃), high temperature and high humidity (60℃, 85%RH) and constant temperature conditions 48h do not unglue foaming]. Versatility and innovation  Water based adhesive products are not only easy to operate, but also widely used. At present, water-based adhesive is mainly used for bonding between UV paper/paper, polished paper/paper, PET/ paper, BOPP/ paper, PVC/ paper, coated paper/gray board, special paper/plastic box, coated paper/gray board and other substrates. Each water-based adhesive has its "inherent characteristics", which mainly include appearance (product appearance and film appearance), solid content, PH value, solvent ratio, opening time, high/low temperature resistance, viscosity, etc. The bonding methods of water-based adhesives are generally divided into three kinds: machine adhesive, hand adhesive, machine adhesive and hand adhesive. Differ...

Because the water glue is bonded together by the film forming principle, its compound effect is very stable, and the product can be cut immediately.If the composite quality is bad because of the process or substrate, it can also be seen in the first time off the machine, and it will not be found after mass production.Therefore, the composite packaging products use water-based glue instead of solvent compound glue, not only to meet the requirements of safety, health and environmental protection, shorten the delivery cycle, but also to reduce the transfer of aluminum plating film.But in the use of some process control points to pay special attention to, according to the long-term use experience of the summary, for the peer reference.But in the use of some process control points to pay special attention to, according to the long-term use experience of the summary, for the peer reference. 1, because the amount of water-based glue is very small, the rubber roller should choose the cable dense and shallow laser engraving roll. Usually 200 wire / 35μdepth, the laser roller has a large mesh shape opening, which ensures the glue is transferred to the film better 2.Before using water glue, be sure to stir the glue slowly in the bucket for 5 to 10 minutes to ensure that the various additives in the glue are mixed evenly. 3.Before gluing to detect the surface tension of the film, it is best to use Dyne liquid, rather than Dyne pen. Different film surface tension requirements are different, specific reference is as follows: Material Name Corona value PET ≥50dyne BOPA ≥52dyne BOPP ≥38dyne CPP ≥38dyne PE ≥38dyne 4. as far as possible to use the reverse rotation of the rubber roller. We have observed in the actual production that the reverse flattening roller has a great impact on the appearance, especially when the composite transparent non-printing or non-full-plate pattern products, the appearance effect can be more visible. By adjusting the speed of the rubber roller, the composite appearance can achieve excellent results. 5, the oven temperature is set from low to high, a section of temperature is generally 70~75℃, 75~80℃, 80~85℃ (the temperature to the set temperature can be turned on) The inlet air and exhaust air of the oven should be put to the maximum. The effect of the air volume on the drying of water-based glue is more important than the temperature. The temperature of some composite rollers is generally set to 70~80℃, and the pressure of composite rollers can be set to be larger. 6.It is best to have a circulating pump between the glue tank and the glue bucket. Clean up the pump before use 7.In order to prevent blocking, the scraper should be stopped and the upper rubber roller should be soaked in the glue to keep rotating. 8.the machine speed is too high will produce bubbles, you can put a glue stick in the groove. 9.After use, wipe the glue on the rubber roller with water first, and then clean it thoroughly with ethyl ester. If the plate has been...

Water-based dry coated adhesive water based bopp film lamination adhesive glue Product Model SA-228 Packing Plastic bucket (50KG/ bucket) or paper bucket Main Application Suitable for gold and silver card paper or ordinary paper and BOPP, PET composite Basic parameters 1 Main material Acrylic emulsion 2 Appearance Opalescent with blue light 3 Viscosity Coat 4 cups≥18S±3 4 PH 6.5-7.5 6 Storage life 6 months Water Based Dry Laminating Adhesive SA-228 Features: 1. This product is a set of water-based cold adhesive brightness and solvent drying advantages as one of the high performance products. 2. Suitable for gold and silver card paper or ordinary paper and various paper prints and BOPP, PET composite. 3. The product cover powder strong, good bonding fastness, excellent water resistance, suitable for paper products embossing, concave and convex, pasting fine packaging boxes, etc. 4. This product has not been found to cause inadaptability to human body. 5. The product has passed, SGS, MSDS qualified testing. Precautions: 1. Before trying this product, it is recommended to clean the rubber plate and rubber roller and other auxiliary equipment. 2. Please do not mix this glue with other glue. 3. The use of this product composite gold/silver cards, fine prints to be papered, it is recommended that the glue on the film completely dried, roller temperature is high under the condition of composite. 4. This product has advantages for gold/silver cards, wine boxes and other printed materials. 5. When making pasting products, we must pay attention to the matching problem of laminating glue and pasting glue, based on the customer's proofing. 6. Composite gold and silver ink products, because the strength is affected by the gold and silver ink itself, whether the strength is satisfied, subject to customer proofing confirmation.