How to solve the bubble in the stretch film
Source：How to solve the bubble in the stretch filmTime：2020-11-18Visitors：
Many stretch film manufacturers will have many bubbles in the stretch film during production, which has a great impact on the quality of the product. The quality inspection of stretch film with bubbles is definitely unqualified and cannot be sold as a finished product. This will not only waste production The material will also waste a lot of time, so avoid this situation during the production process.
In order to avoid the occurrence of these situations, it is necessary to find out the cause of the bubbles. Through research on them, Zhiteng stretch film manufacturers have found some solutions. Let me introduce you to everyone and welcome everyone to discuss them together.
First, select the appropriate ink to increase the coating amount
Appropriate ink can be selected according to needs, increase the coating amount to strengthen the wetting of the glue to the film, and improve the defects of poor local sizing. This can increase the temperature and pressure of the axis, and reduce the speed of compliance. Increase the wetting time and gluing time Wait.
Then, strengthen the management of coating amount and roller
When the stretch film is processed, the glue can be preheated to increase the temperature of the composite pressing roller, and at the same time, the coating roller can be cleaned to strengthen the management of the coating amount and the pressing roller. For the coating rollers of general new rollers, after use, after reaching 5 million meters, they must be aluminum-plated, and then chrome-plated three times and then engraved to prevent poor appearance and peeling caused by insufficient coating rollers. The problem of low intensity.
Next, the coating roller should be replaced regularly
In order to adjust the viscosity of the protective film, attention should be paid to the regular replacement of the coating roller. On the premise that the viscosity meets the process requirements, the coating volume requirements can be achieved through the cooperation of the solid content of the glue and the coating roller. And adjust the drying conditions, such as wind speed, temperature, etc. In addition, the amount of coating film and the temperature and pressure of the composite pressing roller used to make the stretch film are increased, so that the rubber hardness of the pressing roller is increased to between 80-85°C. In addition, the angle adjustment of the "wrap angle" of the film is introduced before the pressing roller to make the composite roller tangent as much as possible.
Finally, moisture-proof measures are required
Moisture-proof measures should be taken during the forming process of the stretch film, such as dry environment, curing agent sealing, etc., which also have a certain effect on improving the bubble problem of the stretch film, thereby greatly improving the quality and use effect of the stretch film.
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