A. The reason why the scraping is not clean
1. The high speed printing ink has too much pressure on the scraper.
2. Poor solubility of ink, poor lubricity.
3. The hardness of the scraper is not enough, and the wear is fast, which makes the scraping performance of the blade not good.
4. The installation method of scraper is improper, or the knife rest is deformed and uneven.
5. Version of the roundness is not good, rough surface treatment.
6. The influence of mechanical accuracy (shaft runout, vibration).
7. The drying speed of ink printing is too slow.
A. Countermeasures for scraping unclean
1. Reduce printing speed, ink viscosity (viscosity down) to reduce pressure.
2. Adjust the formulation of ink and solvent to increase the solubility and lubricity of ink.
3. Choose the scraper with good hardness, such as ceramic knife.
4. Rationalize the air pressure of the scraper, pay attention to the installation of the scraper and the inspection of the knife rest to ensure the flatness of the scraper.
5. Check whether the plate is eccentric, polish the surface of the plate and reverse if necessary.
6. Check the accuracy of the machine to ensure that there is no runout and vibration.
7. Fast, special ink dry, not dry parts of the ink. (the same is true of plate blowing).
B. Causes of paste
1. Printing environment high temperature and humidity, easy to produce.
2. Poor ink formula design, and plate and affinity is too good.
3. Ink solubility is too good, drying too slow.
4. The auxiliaries precipitated from the printing substrate are dissolved by solvent and have a good affinity with the ink, and the scraper is not easy to scrape off.
B. Solutions to paste up
1. The printing environment has great influence, so we should pay attention to the temperature and humidity control of the production workshop.
2. If necessary, adjust the formula to improve the affinity between ink and plate, b813 is very effective in ink.
3. Adjust the solvent ratio, add a point of poor solubility solvent, improve the drying speed of the ink (prevent and base material additives precipitation, solvent solubility is good, easy to dissolve from the substrate.
4. Pay attention to the storage environment of the substrate, avoid storage under high temperature and high humidity, and choose a better substrate for printing.
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.