Low distortion interlayer
First Claim
Patent Images
1. A polymer sheet, comprising:
- poly(vinyl butyral); and
,a plasticizer,wherein said polymer sheet has a surface with a waviness index of less than 20,000 square micrometers, an embossed Rz value of at least 20 micrometers, and a permanence of between 10 and 40 percent.
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Abstract
The present invention is in the field of multiple layer glass panels comprising a polymer sheet having desirable surface properties, and more specifically, the present invention is in the field of multiple layer glass panels comprising poly(vinyl butyral) having a finished surface of relatively low waviness and high roughness disposed in contact with poly(ethylene terephthalate) and/or other poly(vinyl butyral) type layers.
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Citations
22 Claims
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1. A polymer sheet, comprising:
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poly(vinyl butyral); and
,a plasticizer, wherein said polymer sheet has a surface with a waviness index of less than 20,000 square micrometers, an embossed Rz value of at least 20 micrometers, and a permanence of between 10 and 40 percent. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A multiple layer glass panel, comprising;
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a glass sheet; and
,a polymer sheet, comprising; poly(vinyl butyral); and
,a plasticizer, wherein said polymer sheet has a surface with a waviness index of less than 20,000 square micrometers, an embossed Rz value of at least 20 micrometers, and a permanence of between 10 and 40 percent. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A polymer sheet, comprising:
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poly(vinyl butyral); and
,a plasticizer, wherein said polymer sheet has a surface with a waviness index of less than 20,000 square micrometers, an embossed Rz value of at least 20 micrometers, and a permanence of between 30 and 50 percent. - View Dependent Claims (14, 15, 16, 17)
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18. A multiple layer glass panel, comprising;
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a glass sheet; and
,a polymer sheet, comprising; poly(vinyl butyral); and
,a plasticizer, wherein said polymer sheet has a surface with a waviness index of less than 20,000 square micrometers, an embossed Rz value of at least 20 micrometers, and a permanence of between 30 and 50 percent. - View Dependent Claims (19, 20, 21, 22)
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Specification