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Title: Effects of press sizes on internal steam pressure during particleboard hot-pressing process

Source: Forest Prod. J. 59(4):40-44. April 2009

Author(s)Cai, Zhiyong; Birkeland, Michael; Wescott, James M.; O'Dell, Jane; Winandy, Jerrold E.

Publication Year: 2009  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4706-1A

Abstract: Internal steam pressure produced during the hot-pressing cycle in particleboard production is critical to the newly developed bond strength that will determine the overall performance of particleboard. The difference between the accumulation of internal steam pressure for small panels made in the laboratory and that of large commercial-sized panels makes it difficult to transfer knowledge gained from the laboratory to the commercial plant. The objective of this research project is 2-fold: first, to investigate the effect of panel size on the initial development and subsequent dissipation of internal steam pressure during the hot-pressing cycle; and second, to learn how to improve of small laboratory presses to better mimic conditions experienced in the large press used in the manufacturing plant. In this study, changes in the panel size from 56 by 56 cm to 86 by 86 cm resulted in changes in the maximum steam pressure of up to 3.5-fold. A collar made from a steel rod was used, which prevented steam from escaping and helped to build higher internal steam pressure in smaller panels. Finally, the effects of a ‘‘burp’’ (briefly opening the press during the press cycle) or use of a forming screen were also studied in relation to internal steam pressure.

Keywords: Particleboard, equipment, supplies, heat treatment, mechanical properties, temperature, presses, strength, physical properties, steam pressure, hot pressing, press size, bond strength, mat construction

File size: 567 kb(s)

Date posted: 06/26/2009

This publication is also viewable on Treesearch:  view
RITS Product ID: 29713
Current FPL Scientist associated with this product
Cai, Zhiyong
Supervisory Research Materials Engineer
  

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