Téma: Nadační fond - ONE MORE DAY FOR CHILDREN / WPC additive Comments

Additives: As wood flour has strong water absorption, and very polar, and inexpensive outdoor flooring mostly non-polar, hydrophobic, so poor compatibility between the two interfacial adhesion is very small, often need to use a suitable additive to the surface of the modified polymer and wood flour, wood flour and the resin in order to improve the interface between the affinity and capacity. Moreover, the high amount of wood flour filled with molten thermoplastic plastics dispersion is poor, often in the form of some kind of aggregation state of existence, so that the melt flow is poor, extrusion processing difficulties, surface treatment agent to be added to improve the liquidity in order to facilitate extrusion. At the same time, the plastic substrate is also necessary to add various additives to improve their performance and processing properties of the finished product, to improve the adhesion and mechanical properties of the composite wood flour and polymer. Common additives include the following categories:

Coupling enables the environmentally friendly wall board strong interfacial bonding between the surface and produce composite pontoon decking; water absorption while reducing flour, wood flour and plastic to improve compatibility and dispersion, so that the mechanical properties of composites improved significantly. Common coupling agents are: isocyanates, dicumyl peroxide, aluminum esters, phthalate esters, silane coupling agent, a maleic anhydride-modified polypropylene agent (MAN-g-PP), ethylene – acrylate (EAA). 1wt% ~ 8wt% wood flour addition amount is generally added in an amount of coupling agent, such as silane coupling agents can improve adhesion plastic and wood powder, wood powder to improve dispersibility, reduced water absorption, and with an alkaline treated wood meal can only improve the dispersibility of the wood powder, wood flour does not improve its water-absorbing plastic adhesion. It should be noted that the maleate salt of stearic acid coupling and repulsion lubricant will react when used together resulting in product quality and yield.