Process for producing a curved laminated safety glass sheet
First Claim
1. A process for producing a bent laminated safety glass pane from a first bent glass sheet 1, a first bonding layer 2, a thermoplastic carrier foil 4 provided with a thin layer system 3, a second bonding layer and a second bent glass sheet matching the first bent sheet, comprising the steps of:
- (a) placing a foil prelaminate, comprised of the first bonding layer and the carrier foil with a bonding layer side against the first glass sheet, (b) placing a cover sheet bent to match the first glass sheet, on the foil prelaminate, (c) degassing the glass-foil stack formed from the first glass sheet and the foil prelaminate and prebonding the stack under heat and pressure, (d) removing the cover sheet, (e) applying the second bonding layer and the second glass sheet to the prebonded glass-foil stack, (f) degassing the thus formed laminate and prebonding the laminate under heat and pressure, and (g) finally bonding the prebonded laminate by the application of pressure and heat to a laminated safety glass pane.
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Accused Products
Abstract
This invention concerns a process for producing a curved, laminated safety glass sheet from a first curved glass sheet (1), a first laminated layer (2), a thermoplastic substrate sheet (4) with a biaxially drawn thin-layer system (3), a second laminated layer (5), and a second curved glass sheet (10) conforming to the first one. To avoid formation of folds in the substrate layer, the process has the following steps: (a) a prelaminated sheet consisting of the first laminated layer (2) and the substrate sheet (4) is superimposed with its laminated layer facing the first glass sheet, (b) a bend-resistant cover sheet (10) conforming to the first glass sheet (1) is superimposed on the prelaminated sheet, (c) the glass layer packet formed out of the first glass sheet (1) and the prelaminated sheet with the cover sheet (10) superimposed upon it is preliminarily bonded by removing the air and subjecting it to pressure and heat, (d) the cover sheet (10) is removed, (e) the second laminated layer (5) and the second glass sheet (10) are superimposed on the preliminarily bonded glass-film pocket, (f) the laminate so formed is preliminarily bonded by removing the air and subjecting it to pressure and heat, (g) the preliminarily bonded laminate is finally bonded into a laminated safety glass sheet by subjecting it to pressure and heat.
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Citations
13 Claims
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1. A process for producing a bent laminated safety glass pane from a first bent glass sheet 1, a first bonding layer 2, a thermoplastic carrier foil 4 provided with a thin layer system 3, a second bonding layer and a second bent glass sheet matching the first bent sheet, comprising the steps of:
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(a) placing a foil prelaminate, comprised of the first bonding layer and the carrier foil with a bonding layer side against the first glass sheet, (b) placing a cover sheet bent to match the first glass sheet, on the foil prelaminate, (c) degassing the glass-foil stack formed from the first glass sheet and the foil prelaminate and prebonding the stack under heat and pressure, (d) removing the cover sheet, (e) applying the second bonding layer and the second glass sheet to the prebonded glass-foil stack, (f) degassing the thus formed laminate and prebonding the laminate under heat and pressure, and (g) finally bonding the prebonded laminate by the application of pressure and heat to a laminated safety glass pane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification