1. Generally speaking, the ratio provided by the adhesive manufacturer is a reasonable ratio obtained through a large number of tests conducted by the adhesive manufacturer. Therefore, there will be no inaccurate proportioning. If the adhesive itself quality reasons must be replaced;
2. Reduce the total content of water and alcohol in ethyl acetate (replace ethyl acetate with good quality, the total content of water and alcohol is less than 0.2%);
3. When NY and cellophane films which are easy to absorb moisture are compounded, the proportion of curing agent (5-10%) should be adjusted and increased, and the damp film should not be used;
4. Reduce the amount of residual solvent in printing ink as far as possible;
5. When using polyurethane ink: the first is to solve the components of diluting solvent in polyurethane ink, and try to avoid alcohol dilution solvent. If the alcohol diluent must be used in printing, it should also minimize the residual solvent during printing.
Secondly, if there is a white ink low printing film, it is best to add a small amount of hardener in the white ink, which can increase the composite fastness. However, the service life of the ink added with hardener is short, if there is surplus and the interval is long, it should not be reused in principle (but this operation wastes a lot, only for reference).
6. Finally, the purity of ethyl acetate for diluting adhesive should be high, and the content of water and alcohol should be as low as possible, which is the quality assurance of cooking bag and dry composite. In addition, when preparing the adhesive, the amount of curing agent should be increased appropriately (the increase ratio is between 5% and 10% of the curing dosage) to ensure the full crosslinking between the main agent and the curing agent.
7. It is necessary to control the compound environment, such as placing the exhaust fan indoors to strengthen the indoor air circulation, but pay attention not to blow to the compound machine. When compounding, always pay attention to the scraper and guide roller near the rubber groove to see if there are water droplets, and reduce the speed at the same time. Because the vehicle speed is too fast, the solvent evaporation speed in the glue tank should be accelerated, and the local temperature near the glue tank is too low, which should cause steam condensation;
8. Shorten the storage time of the prepared adhesive, reduce the amount of preparation each time, increase the preparation times, shorten the storage time, increase the drying channel temperature and reduce the amount of residual solvent. In this way, the influence of water and alcohol on curing agent can be reduced, and as much water and alcohol as possible can be volatilized in the drying channel.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.

We uphold the integrity of cooperation, good quality, good service business philosophy, won the industry's approval, products sold to all over the world; welcome friends from all walks of life to inquire, visit our factory to investigate guidance and business negotiations.