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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.
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.
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
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
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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.
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