| 摘要 |
<p>A method for forming a bilayer glazing panel which comprises: providing an optically clear prelaminate of stretched polyester film coated with a cross-linked, self-healing polyurethane layer; assembling the prelaminate with a layer of plasticized partial polyvinyl butyral with the side of the polyester film without the polyurethane layer in facing contact with a subjacent textured surface of the partial polyvinyl butyral layer; clamping the assembled layers in a perimeter anchoring system; sequentially carrying out the following steps (i), (ii), (iii), and optionally the above clamping step within an air autoclave; (i) deairing the interface between the polyester film and plasticized partial polyvinyl butyral; (ii) forcing localized regions of the layers within the perimeter anchoring system against a sheet of glass; and (iii) subjecting the assembly of step (ii) to elevated temperature and pressure while the plastic layers remain clamped within the perimeter anchoring system to firmly bond the plastic layers and glass sheet together. The apparatus for forming a bilayer glazing panel comprises: a) an autoclavec chamber; b) a thermoforming assembly within the autoclave chamber comprising: (i) a perimeter anchoring system for a multi-layer composite sheet; (ii) a support bed within the periphery of the perimeter anchoring system; and (iii) means associated with the support bed for imposing a negative pressure on the thermoforming assembly; c) means for creating positive pressure within the autoclave chamber; d) means for creating negative pressure within the autoclave chamber; and e) means for controllably heating the atmosphere within the autoclave chamber.</p> |
