Laminate for a safety glazing
First Claim
1. A laminate which is substantially free of reflected distortion when used in a safety glazing comprising:
- a transparent, thermoplastic substrate layer, optionally surface treated or coated, bearing one or more functional performance layers; and
at least one layer of plasticized polyvinyl butyral bonded on one side to a functional performance layer or the substrate layer and having a roughened deairing surface on its other side characterized by a roughness value, Rz, of at least 10 micrometers;
said at least one plasticized polyvinyl butyral layer, before bonding to the substrate layer or functional performance layer, possessing low surface waviness on each side characterized by a wave index value, WI, of less than 15,000 square micrometers.
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Accused Products
Abstract
A laminate which is substantially free of distortion when used in a safety glazing comprising a transparent, thermoplastic substrate layer, optionally surface treated or coated to improve adhesion, bearing one or more functional performance layers, such as an infra-red radiation reflecting stack, and at least one layer of plasticized polyvinyl butyral bonded on one side to a functional performance layer or the substrate layer having a roughened deairing surface on its other side characterized by a roughness value, Rz, of at least 10 micrometers, such plasticized polyvinyl butyral layer, before bonding to the substrate layer or functional performance layer, possessing low surface waviness on each side characterized by a wave index value, WI, of less than 15,000 square micrometers.
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Citations
17 Claims
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1. A laminate which is substantially free of reflected distortion when used in a safety glazing comprising:
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a transparent, thermoplastic substrate layer, optionally surface treated or coated, bearing one or more functional performance layers; and at least one layer of plasticized polyvinyl butyral bonded on one side to a functional performance layer or the substrate layer and having a roughened deairing surface on its other side characterized by a roughness value, Rz, of at least 10 micrometers; said at least one plasticized polyvinyl butyral layer, before bonding to the substrate layer or functional performance layer, possessing low surface waviness on each side characterized by a wave index value, WI, of less than 15,000 square micrometers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 16, 17)
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8. A laminate which is substantially free of reflected distortion when used in a safety glazing for controlling solar radiation comprising:
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a flexible, transparent, thermoplastic substrate layer, optionally treated or coated to improve adhesion, having a carrier surface and an opposite back surface; a multi-layer stack on the carrier surface for reflecting infra-red radiation and transmitting visible light comprising one or more metal layers and one or more cooperating dielectric layers, any of said metal or dielectric layers having been optionally surface modified or coated to improve one or more properties; a first, flexible layer of plasticized polyvinyl butyral having a bonding surface adhered to the back surface of the substrate layer; a second, flexible layer of plasticized polyvinyl butyral having a bonding surface adhered to the outermost layer of the multi-layer stack; each of said first and second polyvinyl butyral layers having opposite, unbonded, roughened deairing surfaces characterized by a roughness value, RZ, of at least 10 micrometers; and each of said first and second polyvinyl butyral layers before bonding to the substrate layer and the stack possessing low surface waviness on each side characterized by a wave index value, WI, of less than 15,000 square micrometers. - View Dependent Claims (9, 10, 11)
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- 12. A laminate substantially free of reflected distortion when used in a safety glazing comprising two layers of plasticized polyvinyl butyral and an intermediate layer of metallized plastic film interposed therebetween, each plasticized polyvinyl butyral layer having i) an exposed deairing surface characterized by a roughness value, RZ, of at least 10 micrometers and ii) before inclusion in the laminate, another deairing surface opposite the exposed surface also characterized by a roughness value, RZ, of at least 10 micrometers and surface waviness on each side characterized by a wave index value, WI, less than 15,000 square micrometers.
Specification