| 摘要 |
A generally planar, structural insulated panel for building construction includes a pair of outer facings disposed on opposed surfaces of a plastic foam core. One of the outer facings is of a gypsum or cementous composite for use on the panel's inner surface, while the other outer facing is of oriented strand board (OSB) or other conventional building material which forms the panel's outer surface. Disposed between and laminated to the inner surface of the gypsum or cementous composite facing and the plastic foam core by a conventional bonding agent is a sheet of paper impregnated with urethane or polyisocyanurate plastic. The impregnated sheet of paper serves as a vapor barrier near the panel's inner surface to prevent moisture from permeating from the warm interior of the structure through the plastic foam insulation to the outside. The plastic impregnated sheet of paper bonded to the foam core and the panel's inner facing also substantially increases the tensile strength of the panel to withstand large transverse loads.
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