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US 2006/0216501 A1Published application
Polymer interlayers comprising antiblocking layers
AssigneeSolutia Inc.
InventorsChiah-chang Lin, Ping Yuan
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Abstract
The present invention is in the field of polymer interlayers used in multiple layer glass panels, and specifically the present invention is in the field of antiblocking agents for polymer interlayers and methods of effectively incorporating such agents into interlayers.
Claims30
An interlayer, comprising:
- a polymer stack comprising a first polymer sheet, wherein said first polymer sheet is substantially free of antiblocking agent;
- and,
- a second polymer sheet disposed in contact with said polymer stack, wherein said second polymer sheet comprises an antiblocking agent and has a thickness of less than 0.4 millimeters.
An interlayer, comprising:
- a polymer sheet, wherein said polymer sheet comprises an antiblocking region and a non antiblocking region, wherein said antiblocking region comprises an antiblocking agent and has a thickness of less than 0.4 millimeters, and said non antiblocking region is substantially free of antiblocking agents.
A method for making a polymer sheet, comprising:
- coextruding a first melt and a second melt to form said polymer sheet, wherein said polymer sheet comprises an antiblocking region formed from said first melt and a non antiblocking region formed from said second melt, wherein said antiblocking region has a thickness of less than 0.4 millimeters, wherein said first melt comprises an antiblocking agent, and wherein said second melt is substantially free of antiblocking agent.
A method for making an interlayer, comprising:
- providing a polymer stack, wherein said polymer stack comprises a first polymer sheet, wherein said first polymer sheet is substantially free of antiblocking agent;
- disposing a second polymer sheet in contact with said polymer stack, wherein said second polymer sheet comprises an antiblocking agent and has a thickness of less than 0.4 millimeters;
- and,
- laminating said polymer stack and said second polymer sheet to form an interlayer.
1 more element
Dependencies are inferred from the claim text.