Wood Plastic Composite Technical Characteristics

in Rules Tue Apr 19, 2016 4:30 am
by qizhenwang123 • Bestseller Writer | 53 Posts | 530 Points

Builders prize wood composites in particular for their durability and comparative low cost. Composite products come in a variety of

colors and textures. The composites hold up well as materials for outdoor projects, those that will stand up to long exposures to weather.

The reason: they are largely impervious to temperature fluctuations and moisture. According to the International Convention of Society of

Wood Science and Technology, "these composites are transformed by extrusion processes to obtain applications including profiles,

sheathings, decking, roof tiles and window trims, with improved thermal and creep performance compared with unfilled plastics.


Composite products, as the name suggests, differ from their all-synthetic counterparts in that they do have an organic

component in their mixture. As explained by the International Convention of Society of Wood Science and Technology, manufacturers

create wood plastic composite products by "mixing wood flour and plastics to produce a material that can be processed similar to

100% plastic-based products." The addition of real wood flour gives the product a more realistic grain and texture than its all

plastic counterpart.

Types of wood
The types of wood used in the mixture vary with the types of wood most common to the area in which the manufacturers make the
composite. For example, in Chile and many other countries pine is a common species. Therefore, manufacturers often use its pulp in

creating composite products. Other woods can help create different consistencies, textures and hues.

Tensile Strength and Durability and Different Results

Manufacturers can create wood plastic composites by using a variety of polymers as well as wood pulps. Additionally,

different extrusion machines will have different effects on density and tensile strength. According to Douglas J Gardner at the

University of Maine and David Murdock at Fiber Composites, "Poly vinyl chloride provides the greatest strength and stiffness

for wpc composites followed by polypropylene and polyethylene. The greater the wood content, the better the stiffness properties

of the composite. However, there is a direct trade-off between wood content and the moisture-resistant properties of the wpc lumber.

So for projects which will have a greater exposure to weather and moisture, choose a wood plastic composite with a lower wood content.

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