Zhengzhou powdered urea-formaldehyde resin manufacturers

Urea-formaldehyde resin powder (specification) Usage: plywood, veneer, bentwood furniture manufacturing, increase the solids content of liquid urea-formaldehyde glue, die casting, grinding wheel manufacturing. Features: BX-100 is a powdered urea-formaldehyde resin, before use it is dissolved in water and then reacted with the appropriate modifier (such as flour), curing agent blended into the adhesive can be widely used in wood processing industry. It is used in cold bonding, heat bonding and high-frequency heating. The adhesive bonding strength with good use, easy to haul, easy-to-save features. Technical indicators Appearance white, free flowing powder Viscosity 25 ℃ (glue: water = 2: 1) 2500-3500 mPa · S PH 25 ℃ (glue: water = 2: 1) 7.5-8.0 specific gravity 25 ℃ (glue: water = 2: 1) to about 1.220g / cm3 Packaging: standard bag, net weight 25kg. Storage: Resin shall be sealed in its original container inside, and should strictly be stored in a suitable temperature (ideal temperature is 15-30 ℃) and dry place. Under such conditions storage is 12 months. BX-100 non-combustible. Preparation of a mixture of glue before use, the powdered resin is dissolved in water, a suitable temperature of the water is 15-30 ℃. When the resin dissolved in hot water, it is important that the solution was cooled in the first resin prior to curing agent added grease, glue or active period will be shortened. Glue mixture ratio (by weight) of: BX-100 100 40-60 modifiers appropriate amount of water curing agent right amount of activity: with the variety and amount of modifier and hardener different active period is also different. Preparation of wood planks should be glued uniform thickness, the surface must be removed grease, dust and other pollutants, wood moisture content should be 6-13%. The amount of glue: glue depends on the surface quality of gluing materials, general adhesive capacity of 150-200g / m. On (such as medium density fiberboard) very smooth surface or on a stick mask, can amount to reduce the amount of glue. On the contrary, in some rough surfaces, such as veneer surface, then use more glue. Aging time: the shorter the better aging. The maximum allowable assembly time depends on the amount of adhesive, the type of timber, temperature, relative humidity and air velocity (ventilation and displacement). Under normal circumstances, the pressure must be carried out when there is also tacky glue. Pressure: Pressure depends on the density of the adherend, surface smoothness, thickness tolerances and auxiliary equipment time. Normal pressure is 0.5-1.6Mpa (5-16kg / cm 2). Pressing time: cold is 6-8h, hot due to material and heating conditions. High-density and low-absorbent material, such as hardwood, special particleboard (water), and other pressing needs more time. Formaldehyde emission: urea-formaldehyde powder stick into a formaldehyde product volume depends on many factors. The most important factors are as follows: trees, rubber mixture of Formulation (type modifier / hardener and how much), the amount of adhesive, coating speed, and humidity of the glue from the glue line to the surface of the distance, Pavement time and pressure. In addition, increasing the modifier may be effective in reducing formaldehyde emission. Cleaning: Glue and coating equipment to be cleaned before and after the glue set. The most easily done with warm water. Once the adhesive curing is insoluble. If the glue residue and for cleaning water is discharged into the sewer, it will cause pollution, so deal with them to take appropriate action. Safety precautions: BX-100 can be safely operate. To avoid skin can not yet hardened plastic direct contact, which affects people have skin allergies should wear impervious gloves, the same way, pay attention to eye protection to splash into the eyes. Before meals and after work to wash their hands thoroughly washed skin should be dry with paper towels. When emptied transport bags, to avoid inhaling dust. Also good ventilation strip is very important, especially in mixed plastic, adhesive, load and pressure areas.