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

Like water-soluble resin, easier to cure, cured resin non-toxic, colorless

Good light resistance, long-term use does not change color, heat molding does not change color, can add a variety of colorants to prepare a variety of brightly colored products. Urea-formaldehyde resin hard, scratch-resistant, weak acid weak alkali and grease and other media, cheap, with a certain toughness, but it is easy to absorb water, and thus poor water resistance and electrical properties, heat resistance is not high. Urea-formaldehyde is widely used in water-resistant and dielectric properties of the products are not demanding, such as plug-in board, switches, machine handles, instrument shell, knobs, daily necessities, decorations, mahjong card, toilet cover, can also be used for some tableware The Urea is used as a toilet cover material, so that the toilet has a good heat resistance, not easy to burn, acid, alkali resistance, natural fire-retardant properties, anti-scratch, not yellow, easy to clean, easy to install, Beauty and other characteristics.