Dry composite is a mature composite technology and is the leading composite process in China's flexible packaging industry. Solvent-free compounding is a green composite technology that represents the future development direction of composite processes and has been widely used in some developed countries and regions. To successfully apply both processes, management and technicians of flexible packaging companies must fully understand the differences between the two.
Technical principle difference
The difference in technical principle is mainly reflected in the coating method, the formation mechanism of the film and composite fastness, the drying and cooling process, and the curing process.
Process parameter difference
The difference in process parameters is mainly reflected in the amount of glue applied, curing temperature, composite pressure, belt tension, drying temperature, coating roll temperature, composite roll temperature, cooling roll, winding uniformity, and environmental humidity.
Appearance quality difference
In terms of appearance quality, there are some differences that can be observed by the naked eye between the solvent-free composite product and the dry composite product, which is directly related to the characteristics of the composite process itself.
Scope of application
The solvent-free composite process can not achieve the same effect as the dry composite in the composite structure, the type of the interior, and the special use, but it can replace the dry composite process in most cases.
The above content is selected from Keyin Media. Printing Technology ·Packaging and Decoration 》2012, No. 16, more journal content please pay attention to the journal channel .
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