B - Operations – Transporting – 27 – N
Patent
B - Operations, Transporting
27
N
18/952
B27N 3/12 (2006.01) B27N 3/00 (2006.01) C08L 97/02 (2006.01)
Patent
CA 1211913
TITLE PROCESS FOR MANUFACTURING COMPOSITE PRODUCTS FROM LIGNOCELLULOSIC MATERIALS INVENTOR Kuo-Cheng Shen ABSTRACT OF THE DISCLOSURE A low cost process of making composite products from sugar containing lignocellulosic materials, such as sugarcane bagasse and stalks of sorghum, corn, sunflower, flax and the like, utilizing the residual sugars as bonding and bulking agent: Comminuted sugar containing lignocellulosic material wholly composed of or partially in combination with other lignocellulosic materials, in the absence of adhesive binders or bonding agents, is moulded at a temperature of at least 160°C, and a pressure for a time sufficient to compound the material into a composite product. The free sugars in lignocellulosic materials, which are chemically transformed by the application of heat, act as a thermosetting adhesive binder, and provide both bonding and bulking effect. This chemical trans- formation can be further accelerated by the addition of an acidic catalyst to the lignocellulosic material before hot moulding. The composites thus produced possess great strength and excellent dimensional stability. These results are obtained to the greatest extent when the lignocellulosic materials contain a higher proportion of sugars.
447232
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