MULTIPLE LAYER INTERLAYERS HAVING ENHANCED PROPERTIES

摘要

Multiple layer interlayers comprising pairs of alternating polymer layers are provided, along with methods of making and using the same. Multiple layer interlayers according to embodiments of the present invention may include more than three polymer layers and may exhibit desirable acoustic and optical properties, which may make them suitable for use in various types of multiple layer panels, including safety glass for automotive and architectural applications.

主权项

1. A multiple layer interlayer comprising:
a first polymer layer comprising a first poly(vinyl acetal) resin; a second polymer layer comprising a second poly(vinyl acetal) resin; a third polymer layer comprising a third poly(vinyl acetal) resin; a fourth polymer layer comprising a fourth poly(vinyl acetal) resin; and a fifth polymer layer comprising a fifth poly(vinyl acetal) resin, wherein said second polymer layer is disposed between and in contact with each of said first and said third polymer layers and wherein said fourth polymer layer is disposed between and in contact with each of said third and said fifth polymer layers, wherein each of said second and said fourth polymer layers has a glass transition temperature that is at least 3° C. different than the glass transition temperature of at least one of said first, third, and fifth polymer layers, and wherein at least one of said second and said fourth polymer layers has a thickness of less than 50 microns.