Multiple pane sealed glazing unit.

摘要

Glazing sheets 41A, 41B are maintained parallel and spaced apart by a resilient spacing and sealing assembly which runs around the periphery of the sheets. An insulating airspace is thus formed between the sheets. The assembly includes an inner spacer 40 sandwiched between the sheets and located inwardly of the glazing edges, creating an outwardly facing perimeter channel. The inner spacer 40 is comprised of a moisture permeable foam material which may be flexible or semi-rigid. The spacer contains desiccant material and has a pressure sensitive adhesive pre-applied on two opposite sides 43 adjacent the sheets. The inwardly directed face 49 of the spacer is resistant to ultra-violet radiation and the spacer can be coiled for storage. The assembly also has an outer sealing filling 47 in the channel. In a preferred embodiment the spacer is substantially backed with a flexible vapour and gas barrier coating, sheet or film 46.