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An integrated multipane window sash is fabricated from a sash frame having an inside perimeter. An adhesive material is applied to the inside perimeter. The adhesive material has sufficient stiffness to function as a mounting structure for glazing panes, and may also function as a spacing structure.

An integrated multipane window sash is fabricated from a sash frame having an inside perimeter. An adhesive material is applied to the inside perimeter. The adhesive material has sufficient stiffness to function as a mounting structure for glazing panes, and may also function as a spacing structure. A first glazing pane is mounted to a first side of the adhesive mounting structure. A second glazing pane is mounted to a second side of the adhesive mounting structure or to a separate adhesive mounting structure. The adhesive mounting structure can be applied by co-extrusion with the sash profile, by post-extrusion, manually or automatically and can comprise, for example, at least one of a bead of adhesive, a preformed adhesive foam, a preformed adhesive tape, or a chemical sealant. The adhesive mounting structure can be combined with a desiccant.

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An integrated multipane window sash is fabricated from a sash frame having an inside perimeter. An adhesive material is applied to the inside perimeter. The adhesive material has sufficient stiffness to function as a mounting structure for glazing panes, and may also function as a spacing structure.

An integrated multipane window sash is fabricated from a sash frame having an inside perimeter. An adhesive material is applied to the inside perimeter. The adhesive material has sufficient stiffness to function as a mounting structure for glazing panes, and may also function as a spacing structure. A first glazing pane is mounted to a first side of the adhesive mounting structure. A second glazing pane is mounted to a second side of the adhesive mounting structure or to a separate adhesive mounting structure. The adhesive mounting structure can be applied by co-extrusion with the sash profile, by post-extrusion, manually or automatically and can comprise, for example, at least one of a bead of adhesive, a preformed adhesive foam, a preformed adhesive tape, or a chemical sealant. The adhesive mounting structure can be combined with a desiccant. Bibliography: Composites from Plastics and Wood-Based Fillers, USDA Forest Products Laboratory, Madison, WI, pp. 1-27 odds (1991). Myers et al., Effects of Composition and Polypropylene Melt Flow on Polypropylene--Waste Newspaper Composites, ANTEC, 1984, pp. 602-604. Pornnimit et al., Extrusion of Self-Reinforced Polyethylene, Advances in Polymer Technology, vol. 11, No. 2, pp. 92-98. Raj et al., Use of Wood Fiber as Filler in Common Thermoplastics: Studies on Mechanical Properties, Science and Engineering of Composite Materials, vol. 1 No. 3, 1989, pp. 85-98. Raj et al., Use of Wood Fibers in Thermoplastics. VII. The Effect of Coupling Agents in Polyethylene--Wood Fiber Composites, Journal of Applied Polymer Science, vol. 37, pp. 1089-1103 (1989). Resin Stretching: Accent on Performance, Modern Plastic International, Jan. 1974, pp. 58-60. Rogalski et al., Poly(Vinyl-Chloride) Wood Fiber Composites, ANTEC, 1987, pp. 1436-1441. Sonwood Outline, Apr., 1975. Sonwood: a new PVC wood-flour alloy for Extrusions and other Plastic Processing Techniques, Sonesson Plast AB, Malmo, Sweden. Thomas et al., Wood Fibers for Reinforcing Fillers for Polyolef