Hardboard from Extracted Juniper Chips

Chips from western juniper that had been steam-distilled for recovery of volatile oil were ground in an attrition mill and then made into hardboard–some without additives, some with resin, and some with resin plus wax. Juniper boards (both with and without additives, and at both pressing temperatures), when compared with boards made from lodgepole pine and Douglas-fir, were found to possess exceptional bending strength and water resistance but their toughness properties were generally inferior. The inferior toughness probably can be traced to the extended chip steaming times (5-8 hours). The impact strength and toughness of most wood is impaired by exposure to high temperatures for extended periods of time. The juniper boards were noticeably more uniform in specific gravity than were boards from other species pressed under the same conditions. Superior fiber flow characteristic was evidenced by the uniformly colored, semiglossy surface of all boards, without the use of water spray on the surface.

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