solvent-free compound/and solvent-based dry composite technology

The difference between the solvent-free compound and the solvent-based dry type is mainly reflected in the formation mechanism of the film and the complex fastness, the coating method, the function and requirements of each process.

Table 1 solvent-free and dry composite process technology on the principle of the difference:

Project or indicator Solvent-free compound Dry composite
Coating method Multi-roll transfer coating；

Glue thin, uniform thickness；

The coating amount is mainly determined by the rotation speed of each roller, which can be adjusted steplessly

Roll coating；

Thicker layer, for the bump (crest) -like, uneven thickness；

The amount of coating is mainly determined by the number of recessed roller lines, can only replace the concave roller limited adjustment

Film and compound fastness · Low initial viscosity

Film and composite fastness are basically formed in the machine outside the curing process;

The film is formed primarily as a chemical process for two component reactions

· After the oven heating, the initial viscosity is high

· Film and composite fastness mainly in the machine formation, curing process only play a supporting role;

The formation of the film is mainly dry and volatile and composite pressure of the physical process

Dry and cool · No need to dry

One-component glue needs to be cooled, and two-component glue is generally not required to cool

· The necessary process;

Drying is usually high temperature, and each section of the drying temperature and cooling temperature have a greater impact on the composite

Curing For critical processes, curing temperature and time on the reaction of bicomponent glue and thus have a significant impact on the composite quality Usually for the auxiliary process, temperature and time on the composite quality have a certain impact