The thermal lamination is the irreversible process which gives origin to the HPL: the impregnated sheets of decorative and kraft paper undergo a simultaneous pressing and heating process at high levels of heat and pressure.
The process provides the flowing of the thermosetting resins throuht the paper fibers and subsequent its curing to obtain a homogenous non-porous material (> 1.35 g/cm³) with the required surface finish.
Multi-dayligh Press:
- Temperature 140°/150° C
- Pressure > 7 MPa
- Press Cycle 40/50 minutes
The resins are irreversibly interreacted through cross linked chemical bonds formed during the curing process producing a non- reactive, stable material with characteristics which are totally different from those of its component parts.
Quality control at the end of the production process.
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