| 摘要 |
Weatherable building products containing consolidated partially digested lignocellulosic fibers in admixture with a primary, in situ-generated binder, a secondary phenol/formaldehyde binder preferably of the novolac type, and a post press tertiary binder comprising a water repellant but water vapor transmissive impregnating coating. The building materials exhibit only minor thickness swelling when exposed to water, and in addition maintain a significant portion of their initial strength properties after environmental cycling. The products are suitable for use as exterior building materials, particularly entry door components such as door skins, jambs, thresholds, and the like.
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