Frequently Asked Questions
The information provided by Arpa Industriale S.p.A. ("Arpa") in this document is solely indicative. Arpa is unable to warrant the accuracy and completeness of this information. No rights can be derived from the information provided; the use of the information is at the other party's risk and responsibility.
This document does not guarantee any properties of Arpa's products.
1. Production of ARPA HPL
It consists of about 60-70% paper and about 30-40% thermosetting resins. The latter are of two different types; the inner layers of paper are impregnated with phenolic resin and the outer layers with melamine.
2. How is a sheet of high-pressure laminate made?
HPL laminates consist of superimposed layers of paper, impregnated with thermosetting resins and permanently bonded together by simultaneously applying heat (greater than 120° C) and pressure (greater than 5 MPa) for periods of 40 / 50 minutes.
3. Do the levels of heat and pressure the materials are subjected to in the presses affect the properties of the finished product? If so, how and to what extent?
The quality of HPL laminates is influenced by the levels of heat and pressure applied during manufacture. Arpa employs a pressure greater than 7 MPa and a temperature of about 150° C. The surface and structural qualities of the laminates achieve a high standard as a result.
4. What makes a low-quality HPL different from an excellent one?
Poor resistance to scratching, impact, wear, steam, heat, stains and light are indicative of poor quality raw materials and/or manufacturing processes employing lower pressures or temperatures and shorter heating times. The minimum performance requirements are set out in EN 438.