Improving hydrophobic and oleophobic performances of high-pressure laminates
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High-pressure laminates are decorative materials that are widely used in furnishing and building industries. One of their major handicaps, especially in the case of high gloss laminates, is the ease of staining by fingerprints. This problem can a priori be minimized by increasing the hydrophobicity and oleophobicity of the surface. To improve hydrophobicity, the chemical composition of the resin used for impregnation of the laminate’s top layer decorative paper was modified. A melamine-benzoguanamine-formaldehyde resin was used as starting point, and caprinoguanamine was added as a comonomer at different stages of the synthesis. Addition at the end of the synthesis process showed to be the most promising approach for achieving a water contact angle of 91.2°, while the contact angle for a commercial laminate, impregnated with a standard melamine–formaldehyde resin, is 58°. Regarding oleophobicity, several commercial additives were tested with the previously formulated resin. A fluorocarbon additive showed the best result, leading to contact angles of 114° for water and 76° for an artificial fingerprint liquid. In addition, it was shown that fingerprints were easier to clean from the modified laminate surface.
This work was financially supported by Project POCI-01-0145-FEDER-006939 (Laboratory for Process Engineering, Environment, Biotechnology and Energy – LEPABE) funded by FEDER funds through COMPETE2020 - Programa Operacional Competitividade e Internacionalização (POCI) - and by national funds through FCT - Fundação para a Ciência e a Tecnologia. Ana Henriques wishes to thank FCT and EuroResinas – Indústrias Químicas, S.A for PhD Grant SFRH/BDE/93642/2013. The authors acknowledge the collaboration to Isabel Antunes in the acquisition of the SEM-EDS images.
- Adam WD, Ott JD, Scholl F, Schön MD, Wolf A (2000) Melamine formaldehyde impregnating resins for foils and edges. Eur Pat 0710682:A3Google Scholar
- Binder WH, Dunky M (2002) Melamine–formaldehyde resins. In: Encyclopedia of polymer science and technology. Wiley, New York. https://doi.org/10.1002/0471440264.pst498
- European Standard EN438-1 (2016) High-pressure decorative laminates (HPL)—sheets based on thermosetting resins (usually called laminates)—part 1: Introduction and general information. European Committee for Standardization, BelgiumGoogle Scholar
- European Standard EN438-2 (2005) High-pressure decorative laminates (HPL)—sheets based on thermosetting resins (usually called laminates)—part 2: determination of properties. European Committee for Standardization, BelgiumGoogle Scholar
- Hoenigman T (1996) An introduction to high pressure laminates. In: Plastic Laminates Symposium, Atlanta, 19th–22nd August 1996. Technical Association of the Pulp and Paper IndustryGoogle Scholar
- Magina S, Santos M, Ferra J, Cruz P, Portugal I, Evtuguin D (2016b) High pressure laminates with antimicrobial properties materials 9(2):100Google Scholar
- Pizzi A, Mittal KL (2003) Handbook of adhesive technology. M. Dekker, New YorkGoogle Scholar
- Williams JT (2017) Waterproof and water repellent textiles and clothing. Elsevier, LondonGoogle Scholar