System and method for constructing composite building boards using thermoplastic films
First Claim
1. A system for manufacturing building boards along a production line, the system comprising:
- a roll of a first glass mat, the first mat having interior and exterior surfaces;
a coating apparatus and a supply of a hot melt thermoplastic, the coating apparatus being configured to apply a thin layer of the hot melt thermoplastic on the exterior surface of the first glass mat;
guide rollers for inverting the first glass mat after the application of the hot melt thermoplastic, the guide rollers configured to allow the applied thermoplastic coating to partially cool;
a series of forming tables positioned downstream of the coating apparatus, the guide rollers configured to deliver the first mat with the thermoplastic coating to a forming table, wherein the adhered thermoplastic coating faces the forming table and the interior surface of the first mat is exposed.
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Accused Products
Abstract
Disclosed are building board manufacturing techniques that minimize the build-up of slurry on associated forming equipment and also produce panels with enhanced physical properties. The methods involve applying a dissolvable film laminate to one or more fiber mats at the outset of the forming process. In the undissolved state, the film acts as a containment envelope for the gypsum slurry and any free floating glass fibers. During subsequent curing, the film is dissolved by vaporized water. In its dissolved state, the film is liquefied and coats the fibers of the underlying mat. This results in a building board with improved physical properties.
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Citations
17 Claims
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1. A system for manufacturing building boards along a production line, the system comprising:
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a roll of a first glass mat, the first mat having interior and exterior surfaces; a coating apparatus and a supply of a hot melt thermoplastic, the coating apparatus being configured to apply a thin layer of the hot melt thermoplastic on the exterior surface of the first glass mat; guide rollers for inverting the first glass mat after the application of the hot melt thermoplastic, the guide rollers configured to allow the applied thermoplastic coating to partially cool; a series of forming tables positioned downstream of the coating apparatus, the guide rollers configured to deliver the first mat with the thermoplastic coating to a forming table, wherein the adhered thermoplastic coating faces the forming table and the interior surface of the first mat is exposed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 16, 17)
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11. A system for manufacturing building boards, the system utilizing a forming table and a mixer for supplying a slurry, the system further comprising:
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a roll of a mat, the mat having interior and exterior surfaces; a coating apparatus positioned in-line with the forming table and the mixer, the coating apparatus containing a supply of a thermoplastic and configured to supply a layer of the thermoplastic on the exterior surface of the mat. - View Dependent Claims (12, 13, 14, 15)
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Specification