Composite application of the hottest two-component

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With the development of social economy, the flexible packaging industry has developed rapidly. The improvement of living standards has also prompted people to pay special attention to topics related to their own health, so the requirements for food and packaging safety and hygiene are becoming more and more strict. Most plastic packaging materials are used for food packaging, so the health, safety and environmental protection of plastic packaging are closely related to the health of consumers. At present, domestic food packaging composite films are basically compounded with solvent-based adhesives, so there will be solvent volatilization and a small amount of solvent residues in the compounding process. Food packaging containing solvent residues will produce peculiar smell in the packaging and deteriorate the food. Solvent volatilization in the compounding process not only pollutes the environment, but also endangers the health of field operators. Therefore, reducing the solvent volatilization and solvent residue in the process of food packaging and compounding, while ensuring the quality of products, reducing costs, improving enterprise efficiency, and seeking a path that is in line with the environmental protection and health of food packaging, but also suitable for the development of enterprises themselves, has become the common goal of domestic food packaging enterprises. Shanghai Longhong Chemical Technology Co., Ltd., adhering to its sense of society and environment and confidence in its own strong technology, has vigorously developed two-component water-based adhesives, and successfully introduced two-component water-based adhesives into the flexible packaging market, bringing a revolution in environmental protection and cost to China's flexible packaging industry. Two component water-based adhesive, commonly known as water glue, is a kind of water-based polymer lotion. In the production process of composite packaging, it emits 100% water vapor instead of harmful solvents. The finished packaging product fundamentally eliminates the residual solvents and will not produce any peculiar smell. For flexible packaging manufacturers, the biggest advantage of this two-component water-based adhesive is that it can be applied to the existing dry composite production line, and it can be used directly without equipment transformation or additional investment. The comprehensive cost of two-component water-based adhesives is also lower than that of existing domestic solvent based adhesives. There is no need to worry about the hygienic performance index when using the two-component water-based adhesive. This adhesive fully conforms to the FDA standard of the U.S. Food and drug administration

characteristics of two-component aqueous adhesive: first, when gluing, only the main agent and curing agent need to be mixed, with simple operation process and low cost. 2、 It is a composite finished product, which can be suitable for food, medicine, daily chemical and other products. 3、 It is the short ripening time of finished products, and the post-processing such as cutting and bag making can be carried out after 12 hours of ripening. This feature is especially suitable for the current needs of food manufacturers to shorten the supply cycle. 4、 Is processing simple packaging machine 'target=_ Blank> the composite performance of transparent film is more prominent, with high transparency and peel strength. 5、 When it is a composite aluminized structure product, it not only has good composite strength, but also has no aluminized transfer phenomenon. 6、 It has good versatility. It can compound different product structures without cleaning the corrugated roller, and has high production efficiency

composite application process requirements of two-component aqueous adhesive: 1 The dyne on the surface of the substrate needs to be greater than 38 dyne/cm. 2. Select 170200 linear roller for gluing. 3. Solid content: 42%, he said: "We can take many measures from the technical level. 4. Compounding speed: 70 140m/min. 5. Oven temperature: 60 ℃ ~ 70 ℃, 70 ℃ ~ 80 ℃, 80 ℃ ~ 90 ℃. 6. Compounding roll temperature: 60 ℃ ~ 70 ℃. 7. Compounding roll pressure: 4 kg

links to pay attention to when compounding two-component water-based adhesives: 1. Because the gluing amount of two-component water-based adhesives is very small, it is necessary to choose a corrugated roller with dense and shallow lines and large eye shape opening, so as to ensure water Adhesive can be better transferred to the film. 2. Before using the two-component water-based adhesive, it is necessary to stir it slowly in the barrel for 5 ~ 10 minutes to ensure that a variety of additives in the two-component water-based adhesive are mixed evenly. 3. Try to use the rubber leveling roller with reverse rotation. 4. When compounding, the oven temperature reaches the set temperature and starts up. The inlet and exhaust air of the oven is turned on at the maximum to ensure that the adhesive coating also points out the direction for the development of lightweight and green automotive materials. The drying of the layer. 5. In order to prevent blocking, loosen the scraper as much as possible when stopping the machine, and keep the wrinkle roll soaked in water-based adhesive and rotating. 6. In order to prevent bubbles caused by too high machine speed, put a uniform ink stick in the glue groove

physical properties of composite products: physical property test table product structure composite appearance peel strength heat sealing strength gluing amount (dry basis) bopp/vmcpp good 1.6n/15mm 2.3n/15mm 1.8g/㎡ bopp/cpp good 2.6n/15mm 2.9n/15mm 2.0g/㎡ bopp/cpe good 2.4n/15mm 2.6n/15mm 1.8g/㎡ it can be seen that the physical properties of products using water-based adhesive composite when producing the same product with the same material reach the level of solvent based adhesive composite, However, its glue amount is far less than that of solvent glue composite. And after the application of the two-component aqueous adhesive compounding technology, the residual solvent in the compounding process not only does not increase, but also volatilizes the original solvent of the printing film. As long as this point is controlled, the product can meet the requirements of the national and industrial food packaging solvent residue after it is off the machine, so as to ensure the hygiene, safety and environmental protection of food packaging

economic benefits: according to statistics, the use of two-component aqueous adhesives can save about% of the use cost for enterprises

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