Electronic Theses and Dissertation

High pressure laminates (HPL) merupakan salah satu aplikasi dari resin termoseting terhadap material berbahan kayu sebagai panel protektif serta dekoratif melapisi furnitur bangunan. Resin melamin-formaldehid (MF) adalah salah satu resin yang berperan dalam produksi high pressure laminates. Resin ini memiliki stabilitas penyimpanan yang rendah akibat cross-linking antar metiol melamin bebas diiringi penurunan pH selama proses penyimpanan. Penelitian ini bertujuan untuk meningkatkan stabilitas penyimpanan resin melamin-formaldehid dengan penambahan boraks sebagai agen buffer. Sintesis resin MF dilakukan melalui tahapan polimerisasi dan kondensasi dilanjutkan dengan adanya penambahan boraks dengan konsentrasi 0, 0.5 1, 1.5, & 2 % saat titik akhir tercapai. Karakterisasi resin meliputi analisa parameter fisik dan kimia resin serta analisa gugus fungsi resin dengan FT-IR. Studi stabilitas penyimpanan resin MF dilakukan dengan pengamatan visual harian serta penentuan perubahan pH dan viskositas harian. Resin MF selanjutnya digunakan dalam produksi high pressure laminates. Karakterisasi HPL meliputi analisa kualitas berdasarkan SNI ISO 4586-7:2017 dan analisa tingkat gloss. Pada penelitian ini, resin MF boraks 1.5 % memiliki stabilitas penyimpanan tertinggi yaitu 11 hari. Analisis kualitas HPL memenuhi standar SNI ISO 4586-7:2017. High pressure laminates dari resin MF boraks 1.5 % memiliki tingkat gloss tertinggi yaitu 115.

High pressure laminates (HPL) is one of the applications of thermosetting resins for wood-based materials as protective and decorative panels covering building furniture. Melamine-formaldehyde (MF) resin is one of the resins that plays a role in the production of high pressure laminates. This resin has low storage stability due to cross-linking between free melamine methylols accompanied by a decrease in pH during the storage process. This study aims to improve the storage stability of melamine-formaldehyde resin by adding borax as a buffering agent. The synthesis of MF resin was carried out through the stages of polymerization and condensation followed by the addition of borax with a concentration of 0, 0.5, 1, 1.5, & 2 % when end point achieved. Characterization of the resin includes analysis of the physical and chemical parameters of the resin as well as the analysis of resin functional groups by FT-IR. Storage stability study of MF resin was carried out by daily visual observation and determination of daily changes in pH and viscosity. MF resins are further used in the production of high pressure laminates. High pressure laminates characterization includes quality analysis based on SNI ISO 4586-7:2017 and gloss level analysis. In this study, 1.5 % MF borax resin had the highest storage stability, namely 11 days. High pressure laminates quality analysis complies with SNI ISO 4586-7:2017 standards. High pressure laminates of MF borax 1.5 % resin has the highest gloss level of 115