Laminating film peeling force is not enough 
Composite film peeling force is not enough, according to its phenomenon category can be divided into: batch full-width peeling force is not enough, local peeling force is not enough (such as local non-curing or poor curing), transfer phenomenon (such as ink transfer or aluminized layer transfer) and so on. The causes are various, but mainly belong to the physical causes.

How to effectively reduce the phenomenon of insufficient peel strength of composite film? 
Try to use qualified materials (qualified surface tension, strong adhesion of the adhesive layer), if necessary or possible, install online corona equipment. 
Choose the most suitable brand of adhesive for your company's product characteristics. 
Strictly in accordance with the instructions and requirements of the use of adhesives, adhesive warehousing, and in accordance with the relevant regulations and requirements of the correct use of adhesives. 
Try to use automatic mixing machine mixing, strictly according to the regulations of the correct use of mixing machine, and ensure that the mixing machine is in a normal state.

Table 1 Reasons and solutions for insufficient peeling force of composite film

On the composite film “transfer” phenomenon, there are “ink transfer” and “aluminum transfer” two kinds, sometimes a single phenomenon, sometimes at the same time. But the performance is often one of them, because when one of the phenomena (the weakest intensity) appeared, the other is often covered up and ignored.

1, the reasons for the generation of transfer 
Any change in the shape of the object will produce stress. Solvent-free adhesive curing process, in fact, is also the adhesive from the liquid state into a solid state, this process produces “deformation stress”. Composite film to produce “ink transfer” or “aluminum transfer” is the direct cause of the adhesive curing process “deformation stress” caused by: when the ink or aluminum layer and plastic film between When the adhesion between the ink or aluminum layer and the plastic film is much smaller than the deformation stress generated during the curing of the adhesive, it is easy to produce transfer.

2、Prevention and improvement methods 
Transfer phenomenon can be prevented, improved or resolved through a variety of initiatives. 
First, the use of surface corona better substrate for printing, to ensure that the printing ink adhesion is higher; composite aluminized film when the choice of higher adhesion of aluminized film. 
Secondly, a series of process adjustment measures such as fine-tuning the ratio of A/B adhesive, adjusting the order of three-layer lamination, and appropriately lowering the curing temperature (prolonging the curing time to alleviate the intensity of “deformation stress”) can prevent, improve or solve the phenomenon of ink transfer/aluminum transfer.