What are the factors affecting the stability or shelf life of UV ink?

An important factor affecting the stability of ink is the storage of ink. UV inks are usually stored in plastic cartridges rather than metal cartridges, because the plastic container has a certain oxygen permeability, which can ensure that there is a certain air gap between the ink surface and the container cover. This air gap - especially the oxygen in the air - helps Z greatly reduce the early crosslinking of the ink. In addition to packaging, the temperature of ink containers also plays a vital role in maintaining their stability. High temperature will cause early reaction and crosslinking of ink. The adjustment of the original ink formula may also affect the stability of the ink on the shelf. Additives, especially catalysts and photoinitiators, may shorten the shelf life of inks.

2. What is the difference between in mold labeling (IML) and in mold decoration (IMD)?

The basic meaning of in mold labeling and in mold decoration is the same, that is, put the label or decorative film (prefabricated and non prefabricated) into the mold, and the molten plastic will support it when the part is formed. The labels used in the former are produced by different printing technologies, such as gravure, offset, flexo or screen printing. These labels are usually printed only on the upper surface of the material, while the unprinted side is connected to the injection mold. In mold decoration is mostly used to produce durable parts and is usually printed on the second surface of the transparent film. In mold decoration is generally printed by screen printing machine, and the film and UV ink used must be compatible with the injection mold.

3. What happens if a nitrogen curing unit is used to cure Color UV ink? The curing system that uses nitrogen to solidify printed matter appeared as early as ten years ago. These systems are mainly used in the curing process of textiles and membrane switches. The reason why people use nitrogen to replace oxygen is mainly because oxygen will inhibit the curing of ink. However, due to the limited illumination of bulbs in such systems, the curing effect of pigments or color inks is not very good. Polyketones are secondary metabolites produced by bacteria, fungi, plants and animals. These substances are not necessary for biological development and growth, but can be used for defense or communication between cells. Polyketones are derived from the polymerization of acetyl and propionyl. The possible effects are antibiotics, antifungals, cytostatic or natural pesticides. It has commercial value.