Material analysis of shrink film label

Currently, the shrink film label is mainly PVC shrink film, from an environmental point of view, the urgent need to develop OPS and PET based shrink film as a substitute for PVC. OPS because of light weight, shrinkage, printing performance, widely used in polyester bottles of soft drinks labeling and full sealing label and optical disc shrink packaging. PET shrink labels can be used for daily necessities, edible oil packaging container label sets and other industrial shrink packaging.

Determined film thickness is based on the application of the label and cost factors. Of course, the price is not a decisive factor, because each film has its uniqueness, users and trademarks of the printing plant before signing the film must be clear and the most suitable materials technology. In addition, the processing equipment required indicators and other process factors also directly affect the thickness of the choice. Usually require the production of shrink film label film thickness of 30 ~ 70UM, of which the application of 4 0um, 50um film more.

In printing heat shrinkable film, how to control the drying temperature is very important. Drying temperature is too high, the material heat shrinkage; temperature is too low, the ink drying is not thorough, leading to the final adhesion and back dirty. Our company is currently in the gravure printing machine equipped with color drying device, to ensure that each color ink dry completely. At the same time, in order to make the material do not deform in the drying process, a cold air channel is required between the color groups to control the influence of residual heat.