Food packaging composite film has "small pockmark"
Cause Analysis:
1. There are impurities in the adhesive. There is too much dust in the air in the workshop environment. There is also dust in the hot air blown out in the drying tunnel after the glue is applied. The dust adheres to the rubber layer and is sandwiched between the two base films.
2, the two-component reactive adhesive solvent is easily affected by temperature and becomes white and turbid, resulting in an increase in "small pockmarks".
Corrective and corrective actions:
1. Filter the adhesive; keep the environment clean; keep the rubber bucket and glue tray clean; remove the dust from the hot air with a high mesh filter or other filter material at the air inlet of the drying tunnel.
2, "cloudy white" glue can not be used again.
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