| 摘要 |
A spacer for separating panes of glass in a sealed window unit is formed of a thermosetting resin reinforced longitudinally with continuously extending glass fibers. A layer of a foil material is introduced into the part during the pultrusion process so that the foil is embedded within the pact and defines a moisture impermeable layer in the outer wall of the part. The foil can be carried into the part on a layer of paper or polyester which combines with the resin in a bonding action. The rovings forming a top surface of the spacer have one or two of the rovings introduced without impregnation by the resin so as to produce a more permeable central section of the top surface.
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