Properties and Applications of Paper-plastic Composite adhesives (V)

Properties and Applications of Paper-plastic Composite adhesives (V)

2022-12-06

Eight, filling

The concept of filling is rarely mentioned in the application of laminating glue, but can never be ignored.The surface of the paper inevitably exists in some depression. When compounding, if the depression in the paper cannot be fully filled, it will also cause the weak.

(Excellent filling effect) (Poor filling effect)

The main factors affecting the filling effect are as follows:
1) The glue is hard, and the rubber layer lacks the ability to deform
2) The amount of glue is small, and the amount of glue is not enough to fill the depression in the paper or the gap in the ink
3) The temperature and pressure of the pressure roller are low, so that the rubber layer cannot be fully deformed and infiltrated
4) Paper or ink pores are too thick.
Nine, fish eyes
Fish eye is a common problem in the process of covering. It is mainly manifested in the gap in the shape of the crater in the film during the glue layer during the upper glue process.

Note: There are many types of holes, such as oil nests, shrinking holes, needle eyes and so on! But the main reason is the following.

(Fish Eyes Phenomenon)

The principle of fish eye is that the film or paper contains materials that are incompatible with glue during the film or paper. These materials are mainly various types of organic oils that are not compatible with water, including: organic solvents, lubricants, elimination, eliminates, eliminates, eliminates, eliminates, eliminates, eliminates, elimination, and elimination agents. Bubble. These types of materials are common raw materials for film -covered enterprises, which are easily mixed in glue during the production process.
Other reasons for fish -eye problems are:
1) Film electro -dizziness has a leakage point or a thin film placement time causes a decrease in electricity value
2) Mix with other types or different brands of glue
3) The glue viscosity is thinner