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xiao1236	Wood-plastic composite material processing problems in the solution! Nov 10 2016, 9:45pm Color consistency and durability for wood-plastic composites, especially outdoor wood-plastic products is essential. Therefore, manufacturers of wood-plastic products are very concerned about the recipes and processing conditions, these products for the final appearance and anti-aging is critical. [url=http://wpcfloordecking.com/blog/install-a-simple-pvc- fence.html]Install a simple PVC fence[/url] As the wood powder does not adsorb ordinary mineral-based pigments, the color of wood powder depends entirely on the wood powder is good or bad wet resin and wood fiber dispersion in the polymer matrix is ??good or bad. Inadequate dispersion will result in the appearance of no visible white spots of colored wood flour. [url=http://wpcfloordecking.com/blog/durable-outdoor-garden- decking.html]outdoor garden decking[/url] The surface of the wood powder particles will not be protected by the resin, and easy to wet and attack by microorganisms, and thus loss of mechanical properties. [url=http://wpcfloordecking.com/blog/corrosion-long-life-outdoor- decking.html]outdoor decking[/url] The colorant must be well dispersed in the WPC matrix polymer. Thus, poor mixing means that the problem is either in the process or in the presence of auxiliary dispersing aids such as lubricants and processing aids. To solve these problems first check the barrel temperature, melt temperature, screw speed. If these parameters are within the specification, the interaction between the formulation and the material needs to be checked. Check the barrel temperature, WPC extrusion is usually conical twin-screw extruder, there are four heating zones.[url=http://wpcfloordecking.com/blog/cheap- outdoor-floor-installation-method.html]Cheap outdoor floor[/url] Temperatures in Zone 1 and Zone 2 are usually high to help compress, melt and mix wood flour. Zone 3 and Zone 4 are used to control the melt temperature. If the temperatures in Zone 1 and Zone 2 are too low, they often result in very poor mixing. 11 views   0 replies   Reply     Quote