Glue treasure
Overview：
Artificial board including plywood, particleboard and fiberboard. Mainly to the single board, grass, wood chips and other fibres or powders as the raw material, a kind of practical, beautiful, cheap and save resources of the composite formed by bonding and pressing of. The use of urea formaldehyde resin adhesive is usually a resin orphenol glue. The synthetic technology of urea formaldehyde resin adhesive has the advantages of simple, abundant raw material, low price, convenient use, strongadhesion of lignocellulose, accounting for 65%~75% of the total synthetic resinadhesive for artificial board industry in the. Wood processing industry in China withthe amount of glue 70% ~ 75%, with more than 90% the amount of glue plywood production. But the urea formaldehyde resin adhesive has two inherent shortcomings: one is the weather resistance, water resistance is poor; two is the existence of free formaldehyde, indoor environment pollution, harm to human health. How to reduce therelease amount of urea formaldehyde resin adhesive used in the process of free formaldehyde, to expand its application fields, improve the indoor environment and health level of the dweller, it is particularly important to improve the quality and marketcompetitiveness of plywood.
The plywood as filler for urea formaldehyde resin varieties, using large amount of glueafter the resin content is usually 35% ~ 38%. Flour is our country plywood productionin general packing, glue after the resin content is 40% ~ 49%. But because of the major components of flour is starch, and the crosslinked weak hydroxymethyl, when the added amount increases, bonding strength decreased obviously. And because ofthe water resistance of urea formaldehyde resin adhesive is poor, flour filler mildew in moist environment, the accelerated aging of plywood, strength decline, glue and other phenomena, and release the acidified formaldehyde more (CH2OH+), therefore, the flour packing is difficult to effectively solve the harm of free formaldehyde. WhileChina's arable land has been to ensure residents basic ration of the red line, food prices continued high into a long-term trend, but with a large amount of food as theplywood filler, is obviously not suitable for the situation of our country, with the production of the technology of plywood competitiveness in the market will be more and more weak, until it is eliminated.
Product introduction:
The products of our company have been promoting the use of success, with specialgreen pollution-free raw materials combined with plant fiber and other materials, the use of modified and crosslinking technology is made. The active additive activated alumina has developed pore structure and large specific surface area, largeadsorption resin residual harmful substance such as formaldehyde (arsenic ions such as drinking water purification filter plays a role in most water purifier is the use of activated alumina, can filter water impurities and can adsorb harmful) and can form aspace network link and resin to improve the adhesion strength of plywood, andactivated alumina in oxygen atomic energy and hydroxyl Methyl Residues in urea formaldehyde resin (-CH2OH) association formed in the hydrogen atom, theassociation can prevent excessive infiltration of glue, reduce resin during curingshrinkage stress, migration velocity slows down water vapor in the layer, reduce the breeding of microorganisms, thereby enhancing the plywood durability and water resistance. In addition, the active alumina having a catalytic, unit cell with a partialnegative charge, can absorb the acidification of formaldehyde by electrostatic attraction (CH2OH+) function, the insertion of urea, melamine, aniline andformaldehyde can easily polymerized in the alumina crystal layers or natural poreforming macromolecular material, non-toxic, can further reduce the number of free formaldehyde the. This is the flour and other inorganic filler is difficult to achieve.
Product advantage:
1, 100% alternative flour, usage and flour used exactly the same.
2, reduce the production cost of more than 30%.
3, reduce the release amount of formaldehyde and other harmful substances.
4, in addition to the condition of the same other conditions flour than adding flourplywood of good quality.
