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.

Screen printing UV pressure sensitive adhesive and screen printing water-based pressure sensitive adhesive, has the following different characteristics: because UV curable pressure sensitive adhesive does not contain water or organic solvent, so it can be cured without heating drying channel, and water-based pressure sensitive adhesive to water as diluent, need a lot of heat to volatilizing water;UV curable pressure sensitive adhesive uses acrylic monomer as diluent, has low surface tension, and water-based pressure sensitive adhesive, because water surface tension up to 72dyne/cm, need to use low surface energy surfactant to reduce surface tension, so UV curing pressure sensitive adhesive is more suitable for screen printing on the surface of low surface energy than water pressure sensitive adhesive, For example, it is applied to PE, PP plastic, or coated with printing ink surface; UV curing type of pressure sensitive adhesive has better water resistance, and water-based pressure sensitive adhesive because it contains a certain amount of emulsifier and other hydrophilic additives, often reduce its water resistance. Table 1 simply compares the difference between UV pressure sensitive adhesive and water pressure sensitive adhesive. Table 1: UV pressure sensitive adhesive and water-based pressure sensitive adhesive comparison UV curing pressure sensitive adhesive Water-based pressure sensitive adhesive Solids Content 100% 50%-70% Volatile matter NO Water Substrate wettability Better General Curing condition uv curing Oven heating Workplace Compact equipment Long heating and drying path is required Energy consumption Low High Glue price Higher Lower Peel Strength High High Cohesion strength Excellent Good High temperature and high humidity resistance Better General To sum up, UV curing pressure sensitive adhesive and water-based pressure sensitive adhesive with its obvious product characteristics, used in all kinds of screen printing occasions, water-based pressure sensitive adhesive with its long application experience, for the general customer recognition, UV curing pressure sensitive adhesive as an emerging technology, in the future application, will play a more and more important role.

Classification and characteristics of screen-printable pressure sensitive adhesives Ⅱ Classification of screen-printable pressure sensitive adhesives Because of the simple screen printing equipment, convenient operation, simple printing, plate making and low cost, for the application of coating pressure sensitive adhesive, also often consider the use of screen printing process to coating.The commonly used screen-printing pressure sensitive adhesives on the market can be divided into: Water-based pressure sensitive adhesive: Currently the more common water-based screen printing pressure sensitive adhesive is represented by 3M company SP-7533, SP-7533 has higher peel strength and better high temperature resistance, and occupies an important position in the market.This product is based on acrylic emulsion as the main body, solid content of 65%, viscosity of 35000cps, mainly used in various industrial label applications. Solvent-based screen printing pressure sensitive adhesive: Although the heat curing solvent-based screen printing pressure sensitive adhesive has a higher balance of peeling strength and shear strength than water-based pressure sensitive adhesive, and the water resistance and silkscreen operation are better than water-based screen printing pressure sensitive adhesive, due to the requirements of environmental protection in various countries, the restriction of VOC emission is more and more strict, and the solvent is harmful to the body of the operator. Currently, solvent - based pressure - sensitive adhesives are rarely used in screen printing.UV curing type screen printing pressure sensitive adhesive: As a concept that contains neither water nor organic solvents, UV solidified pressure-sensitive adhesive is environmentally friendly. Over the years, many world-renowned chemical companies, such as BASF, Hankel and 3M, have invested more research and development efforts to develop UV solidified pressure-sensitive adhesive. Universities and other scientific research institutes have also invested in a large number of basic researches. At present, the more mature application is mainly UV curing hot melt pressure sensitive adhesive, such as used in the printing of trademark labels. As a UV curing pressure sensitive adhesive suitable for screen printing, it needs to maintain a state suitable for printing at room temperature, so it needs lower viscosity, requiring the addition of a large number of UV monomers as active diluent in the formula.Generally, it is difficult to obtain both high peel strength and high shear strength in a short UV curing time, thus limiting the application of UV pressure sensitive adhesive in high performance industrial tapes. High performance UV pressure sensitive adhesive, should have high peel strength and high shear strength, and can meet the requirements of low UV energy and fast curing, and has good water resistance, temperature resistance and weather resistance and other physical properties. EcoPSA-1125 as a UV...