Interlayers for laminated safety glass with superior de-airing and laminating properties and process for making the same
First Claim
1. A glass/adhesive sheet laminate comprising at least one layer of glass and a sheet of plastic interlayer, said plastic interlayer having at least one surface with a pattern which provides relatively uninterrupted channels for de-airing in at least two intersecting directions, said channels having depth between 20 μ
- m and 80 μ
m, and width 30 μ
m to 300 μ
m and spaced between 0.1 mm and 1 mm apart.
3 Assignments
0 Petitions
Accused Products
Abstract
This invention relates to thermoplastic interlayers for laminated safety glass with superior vacuum de-airing at elevated temperatures and superior tacking and edge sealing properties. The sheeting has surface pattern on at least one of the surfaces characterized by flat surfaces with substantially uninterrupted channels for air flow in at least two intersecting directions. The channels allow for rapid de-airing while the area roughness parameter ratio ARp/ARt in the range of 0.52 to 0.62, ARt being less than 32 μm, and area kurtosis less than 2.5, allow for ease of tacking of the interlayer onto glass and edge sealing after de-airing has been completed. Said surface pattern may also be superimposed onto a pattern which is generated by melt fracture or other means on at least one side to enhance de-airing and aid edge sealing.
24 Citations
7 Claims
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1. A glass/adhesive sheet laminate comprising at least one layer of glass and a sheet of plastic interlayer, said plastic interlayer having at least one surface with a pattern which provides relatively uninterrupted channels for de-airing in at least two intersecting directions, said channels having depth between 20 μ
- m and 80 μ
m, and width 30 μ
m to 300 μ
m and spaced between 0.1 mm and 1 mm apart. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- m and 80 μ
Specification