Composite film peel strength trouble soft package factory, from the production process, raw materials two aspects of depth analysis!

The peeling strength of composite film is a big problem troubling the soft packaging factory. There are many factors that may affect it. Once the peel strength changes, the final 

packaging quality will be questionable. This paper analyzes the factors affecting the peel strength from the production process and raw materials for reference.

First, the production process

1. The amount of glue is insufficient

(1) The concentration of glue is low. According to the structure and use of the product to determine the required amount of glue, to allocate the appropriate glue concentration.

(2) When the glue liquid is reflux on the scraper, the bubbles cannot be eliminated in time. In the two edges of the rubber roller, each bonded a piece of paper, so that the glue 

liquid on the scraper in the process of reflux to the glue groove to delay the reflux time, to provide sufficient rupture time for the glue liquid bubbles.

(3) the cots are not cleaned in time, resulting in mesh blockage. Before stopping the machine, clean the rubber roller with solvent, and in the cleaning process, brush with a capillary

 copper brush; At the same time, according to the continuous reduction of the glue amount (formulate a lower limit, such as 3 g/square meter), below this lower limit must be

 cleaned regularly.

(4) The hardness of the press roll is low.

(5) Matching the number of line roller and the amount of glue. The size of the glue amount and the line number of the line roll matching is one-to-one correspondence, so after

 determining the glue amount, must choose the matching line roll.

(6) The pressure is too large, so that the rubber roller winding deformation, resulting in insufficient local glue. Properly control the pressure of the roller, as far as possible to reduce

 the deformation of the coating roller.

(7) The glue liquid is sticky fluid. In the production process, the speed is high, resulting in insufficient local glue amount. Strictly control the line speed, do not exceed the line speed 

required by the process.