Anti stick phenomenon 1: ink itself resin temperature resistance and formula problem
It is the printing under a certain pressure, and the temperature reaches or exceeds the temperature limit of ink resin, which will happen. If the printing materials are stacked too high in the warehouse, the phenomenon of anti sticking and decolorization will also occur, especially in the plum rain season. Soft packaging enterprises should strengthen the ventilation of transportation and warehouse to avoid high temperature. Secondly, we can put forward improvement suggestions to the ink supplier. The ink supplier can adjust according to the printing equipment.
Anti sticking phenomenon 2: it appears after the printing and winding up.
When the second process, such as laminating, bag making or slitting, there is a phenomenon of anti sticking. This kind of anti sticking is basically serious, and some slight ones can be cleaned after compounding.
Causes of anti sticking
1. The tension is too tight during winding up.
2. Ink drying is not complete.
3. The mixed solvent is impure, especially ethyl ester, ethanol and so on.
4. The solvent ratio is not suitable for the speed and drying temperature of printing equipment.
5. The temperature control of printing drying equipment is unstable or the air inlet and exhaust air are not matched.
6. Printing layout design.
7. Product placement after printing.
resolvent
1. The workshop should adjust the appropriate winding tension according to different printing materials, and record the relevant data. The best tension of the machine is to press by hand with moderate hardness and softness. In particular, do not use transparent ink roll to press.
2. Choose dry ink, pay attention to communicate with ink supplier, product structure and ink requirements. If there is extra color deck, printing film can be more than a few, with cold air to deal with.
3. The purity of solvent should be tested for each batch, and the specific requirements for the solvent supplier should be put forward. And the storage and extraction of solvents should pay attention not to operate in wet areas. Ventilation and cool storage area is the best storage location.
4. Solvent ratio to pay attention to its solubility, volatile speed, and pay attention to the type of resin ink itself to match. Pay attention to the viscosity of the ink, ink layer thickness also has a certain impact on the anti adhesion.
5. Pay attention to check whether the drying temperature of printing equipment is normal and stable, especially whether the air volume of inlet and exhaust air is matched.
6. The layout design should pay attention to the ink lines, the best not to overprint, and then pay attention to the dryness of metal ink and ink viscosity control.
7. Do not stack the printed products horizontally, but hang or vertical.
8. The color on the surface of the package which has been stacked or packed is transferred to the back of another bag (with or without printing). This phenomenon only occurs in purple or a few colors. This is usually related to the storage environment and the performance of the ink itself. Its main reason is color penetration, that is to say, after printing with this color of ink, the printed matter will be permeated quickly under certain time, pressure or other special circumstances, such as PE bags for packing clothes (printed with surface printing ink). In terms of these products, flexible packaging enterprises should fully understand the packaging form and requirements of the products, select the appropriate ink for trial production, and confirm the ink that meets the product requirements before mass production, which can effectively reduce the occurrence of quality problems such as anti sticking and reduce losses.
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.