Urea-formaldehyde resin is the main binder of wood industry at home and abroad, and it has been widely used because of its high bonding strength, fast curing, good operation, low production cost and abundant raw material. Urea is the polymer obtained by reacting urea with formaldehyde. Also known as urea formaldehyde resin. English abbreviation UF. Processing and forming cross-linking occurs, the product is insoluble and non-melting of the thermosetting resin. After curing urea-formaldehyde resin color than the phenolic resin is shallow, was translucent, weak acid, weak base, good insulation properties, excellent wear resistance, cheap, but the case of strong acid, alkali decomposition, poor weather resistance. Trade name Beetle. Urea-formaldehyde resin is low cost, light color, high hardness, oil resistance, anti-mildew, good insulation and temperature resistance, but weatherability and water resistance is poor. It is one of the earlier developed thermosetting resins. The amount of urea-formaldehyde resin used in making plastic products is only about 10% of the total output. (Pulp, wood flour), colorants, lubricants, curing agents, stabilizers (hexamethylenetetramine, ammonium carbonate), and the amount of formaldehyde and urea in the case of low molar ratio of urea Plastic (urea or thiourea) and other components mixed, and then after drying, crushing, milling, sieving, that was urea-formaldehyde compression molding powder. Pressed urea formaldehyde plastic temperature 140 ~ 150 ℃, pressure 25 ~ 35MPa, pressing time varies according to the thickness of the product, usually 10 ~ 60min. Plastic products are mainly electrical lighting equipment and telephone parts, etc. Urea-formaldehyde resin one

como resina soluble en agua, más fácil de curar, resina curada no tóxica, incolora

buena resistencia a la luz, el uso a largo plazo no cambia de color, el moldeo por calor no cambia de color, puede agregar una variedad de colorantes para preparar una variedad de productos de colores brillantes. Resina de urea-formaldehído duro, resistente a los arañazos, álcali débil ácido débil y grasa y otros medios, barato, con una cierta dureza, pero es fácil de absorber agua, y por lo tanto, pobre resistencia al agua y propiedades eléctricas, la resistencia al calor no es alta. urea-formaldehído es ampliamente utilizado en propiedades resistentes al agua y dieléctricas de los productos no son exigentes, como placa de conexión, interruptores, mangos de la máquina, carcasa del instrumento, perillas, necesidades diarias, decoraciones, tarjeta de mahjong, tapa del inodoro, también puede se utiliza para algunos artículos de mesa la urea se utiliza como material de la cubierta del inodoro, por lo que el inodoro tiene una buena resistencia al calor, no es fácil de quemar, ácido, resistencia a los álcalis, propiedades ignífugas naturales, anti-arañazos, no amarillo, fácil de limpio, fácil de instalar, belleza y otras características.