Advances in plastic technologies allow use of wood fiber as an inexpensive filler material for recycled plastics, such as bottles and PVC-siding. These mixtures are used for products like decking, mouldings and rails. The quantities produced and the range of applications will significantly increase in the years to come.
For this reason, a better understanding of the properties of such materials in regard to machining and surface quality is necessary.
For this reason, a better understanding of the properties of such materials in regard to machining and surface quality is necessary.
This publication presents results obtained from ongoing research at North Carolina State University about the characterization of wood fiberplastic composites used in secondary manufacturing applications. Focus is given to commercially available wpc products materials.
Results from sanding, and tool wear testing were obtained.This study was conducted to obtain first indications of these new materials secondary processing properties. Five commercial wood plastic wall decking materials were subjected to tool wear and sanding tests at North Carolina State University's Wood Machining and Tooling
Research Program. This publication presents the results from these tests and offers suggestions for future research projects. Since the research was conducted in two separate projects, one being the assessment of tool wear and the other one being sanding of woodfiber-plastic composites, this paper contains two separate sections, TOOL WEAR ASSESSMENT and SANDING PROPERTIES ASSESSMENT, followed by a brief GENERAL DISCUSSION AND CONCLUSIONS section.
Woodfiber plastic composites materials wear carbide tools more than solid wood does. Some products wear the tool up to six times as much compared to white pine. Also, large differences in material removal rates when sanding were detected. The largest difference between products, however, was detected when sanding belt life was compared. Some products caused a three times shorter belt life than did others.
Pressure treated wood (mostly chromate copper arsenate [CCA] treated pine), the traditional outdoor-building product for a wide range of applications, is facing growing dissatisfaction among users for reasons ranging from health and environmental, as well as product properties related issues. These perceived or real negative attributes fuel an increased interest in alternative materials. Recently, a variety of new products (wood plastic flower boxes) to replace pressure treated decking materials surfaced on the market. Decking materials do not require high structural properties and are therefore easier to replace with other materials that are cost-competitive.
Woodfiber plastic composites materials wear carbide tools more than solid wood does. Some products wear the tool up to six times as much compared to white pine. Also, large differences in material removal rates when sanding were detected. The largest difference between products, however, was detected when sanding belt life was compared. Some products caused a three times shorter belt life than did others.
Pressure treated wood (mostly chromate copper arsenate [CCA] treated pine), the traditional outdoor-building product for a wide range of applications, is facing growing dissatisfaction among users for reasons ranging from health and environmental, as well as product properties related issues. These perceived or real negative attributes fuel an increased interest in alternative materials. Recently, a variety of new products (wood plastic flower boxes) to replace pressure treated decking materials surfaced on the market. Decking materials do not require high structural properties and are therefore easier to replace with other materials that are cost-competitive.
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