Ink Printing Printing Failure Analysis - Not Resistant Cooking/Smell

After the printing and compounding, the packaging is not resistant to cooking, and most of the images are blurred, faded, faded, or residual solvent odor due to the imprinted (dyed) blot or the migration of the amide-based resin with a lower softening point after sterilization. Slowly moving inwards or outwards Generally, this phenomenon is caused by the fact that the ink itself is not heat-resistant, and the heat and pressure become more pronounced. Odor is caused by the addition of butanone or toluene solvent in the printing process or the use of polyisocyanate compound glue. After the hot air and cold air are blown, the printing and compounding process is completed, but the free cyano group remaining in the rubber compound is inevitably generated again when the package is used in the secondary and tertiary sterilization processes. The same reason. If the above materials are used, the fault will also repeat itself. It is very difficult for the solvent compound to completely evaporate and the ink film and the compound to dry out completely because the printing compound is compounded for a moment. In particular, under the condition that the detection and control instruments are not perfect, it is more difficult for small package printing manufacturers to solve them.

For this reason, the following treatment is recommended:
1 In the ink should be as little as possible with or without the above solvent or adhesive.
2 Increase the number of hot air blows and cold air blows, especially after going dry and then re-filming.
3 Ink should be diluted with quick-drying solvent or extrusion compounded.
4Invert the ink type of heat-resistant pigments. When making ink, choose a small acid value, resin or light-resistant transparent dye, use non-azo-type pigments and dyes, avoid poisoning or carcinogenic substances, or add 1% of the ink factory production Fixative.
5 During the printing process, a cap can be placed on the fountain to infiltrate with water-repellent molecules (especially the ingress dyeing of acidic substances).
6 Control the residual volatilization of different solvents.

Failure (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)