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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


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Requested Product

Title: Processing behavior, morphology and benefits of using low-density hollow glass microspheres in polymer wood composites

Source: Proceedings of the 11th international conference on wood and biofiber plastic composites & nanotechnology in wood composites symposium, 2011 May 16-17, Madison, WI. Madison, WI : Forest Products Society, 2011: [6] p. [1 flash drive]

Author(s)Amos, Steve E.; D’Souza, Andy; Yalcin, Baris; Ista, Troy K.; Clemons, Craig M.

Publication Year: 2011  View PDF »

Category: Not Classified
Associated Research Project(s):   FPL-4706-2A

Abstract: Low to moderate strength, low density hollow microspheres have been produced and used in various thermoset applications for decades. The advent of high strength, low density glass microspheres that can survive high shear/pressure polymer processing operations, such as extrusion and injection molding, is now allowing thermoplastics processors to successfully process these functional fillers with high survival rates making target weight reductions possible. In this presentation, we will discuss the compounding methodology of hollow glass microspheres with high density polyethylene/wood flour in a twin screw extruder with subsequent die profiling and demonstrate processing and end use benefits. Morphology of the composites, mechanical and physical properties will be presented. The major benefits can be summarized as reduced density (lower than 1 g/cc) with no, to minimal, sacrifice from moisture uptake and mechanical properties. Other end use benefits include sharper contours of the extruded profiles and improved nail-ability and screw-ability. Thermal behavior of the glass bubble/ HDPE/wood composite profiles during processing and after the fact, i.e. thermal conductivity and diffusivity will also be discussed.

Keywords: Extrusion process, polymers, composite materials, mechanical properties, injection molding of plastics, thermoplastic composites, plastics, extrusion, wood flour, wood-plastic composites, glass, fillers, polyethylene, moisture, thermal properties, thermal conductivity, wood-plastic materials, glass microspheres, strength, HDPE, high density polyethylene, density

Publication Review Process: Non-Refereed (Other)

File size: 1,700 kb(s)

Date posted: 09/27/2011
RITS Product ID: 40116
Current FPL Scientist associated with this product
Clemons, Craig M.
Materials Research Engineer

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