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Ultrasonically-assisted bonding of plastics to surfaces of solid material and product formed thereby

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A method of bonding plastic or polymer to a lignocellulosic material, such as wood, flax, sisal or kenaf fibers, having voids disposed across the surfaces thereof utilizes an ultrasonic radiator to induce ultrasonic vibrations throughout a mixture or layup of the material and molten plastic or polymer during formation of a resulting product, such as a wood fiber polymer composite product. To this end, molten plastic or polymer and the material are placed into contact with one another, and ultrasonic vibrations which are induced throughout the material and the molten plastic or polymer by the ultrasonic radiator urges the plastic or polymer to flow into the voids defined across the surface of the material so that when the plastic or polymer is cooled to a solid condition, the plastic or polymer is in a strong interlocked relationship with the material at the material/plastic or material/polymer interface.
Han, Qingyou (Knoxville, TN), Wang, Siqun (Knoxville, TN)
UT-Battelle, LLC
11/ 228,774
September 16, 2005
[0001] This invention was made with Government support under Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy to UT-Battelle, LLC, and the Government has certain rights to the invention.