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WPC additive Comments
Topic Started: Jul 7 2015, 02:31 AM (5 Views)
wei2xian


<p>Additives: As wood flour has a strong water absorption, and very polar, and most of the non-polar thermoplastic, hydrophobic, so poor compatibility between the two, interfacial adhesion is Small, often need to use suitable additives to modify the surface of polymers and wood flour, wood flour and resin in order to improve the interface between the affinity and capacity. Moreover, the high amount of wood flour filled thermoplastics melt dispersed in poor, often in the presence of some form of state of aggregation, so the melt flow is poor, extrusion processing difficulties must be added to the surface treatment agent to improve liquidity in order to facilitate extrusion. Meanwhile, the plastic substrate is also necessary to add various additives to improve the performance of its processing performance and finished products, improve the adhesion and the mechanical properties of the composite wood flour and polymer. Common additives include the following categories: marine composite wpc</p>

<p>Produce a strong coupling enables interfacial bonding between the plastic and wood flour; while reducing flour water absorption, improve wood flour and plastic compatibility and dispersion, so that the mechanical properties of the composites increased significantly. Commonly used coupling agents are: isocyanates, cumene peroxide, aluminum esters, phthalic acid esters, silane coupling agent, maleic anhydride-modified polypropylene agent (MAN-g-PP), ethylene - acrylate (EAA). 1wt% ~ 8wt% of the amount of flour is generally added in an amount of coupling agent, such as silane coupling agents can improve adhesion plastic and wood powder, wood flour of improved dispersibility, reduced water absorption, but with an alkaline treated wood meal can only improve the dispersibility of wood flour, wood flour does not improve its water-absorbing plastic adhesion. It should be noted that the maleate salt of stearic acid coupling agent and lubricant will react repulsion, when used together resulting in product quality and yield. wood plastic composite pellets usa</p>

<p>Plasticizer for some of the higher glass transition temperature and the viscosity of the resin melt flow such as hardness PVC, with the wood flour composite processing difficulties, often need to add a plasticizer to improve its workability. Plasticizer molecular structure containing non-polar and non-polar genes, shear at high temperatures, it can enter the polymer chains by genetic polarity attract each other forming a uniform and stable system, but it is longer polar molecules inserted weakened mutual attraction of the polymer molecule, making processing easy. In WPC often be added plasticizers dibutyl phthalate (DOS) and the like. As in PVC Wood Flour Composites, adding plasticizers DOP can reduce the processing temperature, reducing the decomposition of wood flour and fuming, improving by agents DOP content increases, the tensile strength of the composite decline increased elongation at break . perforated plastic panels for pool deck screen</p>
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