Laminated Glass Interlayer Layout for Bubble and Wrinkle Reduction
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Solution Overview
Problem
Wrinkles and air bubbles form in laminated glass when functional members with higher rigidity than the interlayers are sealed, especially on curved surfaces, leading to decreased adhesion and increased delamination risk.
Innovation Solution
Laminated glass design with first and second functional members spaced apart by a distance of at least 15 mm, with interlayers in contact with the glass substrates, reducing air bubbles and wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If functional members are disposed dividedly inside the interlayers, then wrinkle occurrence is suppressed, but air bubbles remain in the gaps between functional members
Solution Approach 1:
The functional member is divided into multiple separate functional members (first functional member and second functional member) that are spaced apart from each other. This segmentation allows the interlayer to be in direct contact with the glass substrate in the gap regions, enabling air bubbles to escape during the lamination process while maintaining the wrinkle suppression benefit of divided functional members.
Solution Approach 2:
The interlayer acts as an intermediary medium that facilitates air bubble removal. By allowing the interlayer to contact the glass substrate directly in the gaps between functional members, the interlayer serves as a pathway for air bubbles to escape during lamination, thus resolving the air bubble residue problem while maintaining the divided functional member configuration.
2Adaptability or versatility
If functional members with higher rigidity than interlayers are sealed, then functional performance is improved, but wrinkles occur especially on curved surfaces
Solution Approach 1:
The functional member is segmented into multiple smaller functional members spaced apart from each other. This segmentation reduces the overall rigidity of the functional member assembly, allowing it to better conform to curved glass substrates and suppress wrinkle formation while retaining the necessary functional performance through the distributed configuration.
Solution Approach 2:
Instead of using a single large functional member that provides excessive rigidity, the invention uses multiple smaller functional members that provide sufficient functional performance with reduced rigidity. This partial action approach allows the functional members to flex and conform to curved surfaces without wrinkling.
3Manufacturing precision
If functional members are spaced apart, then wrinkle occurrence is reduced, but adhesion between functional members and interlayers decreases
Solution Approach 1:
The configuration creates different local qualities in different regions: in the gap regions between functional members, the interlayer contacts the glass substrate directly to allow air bubble escape; in the contact regions, the interlayer adheres to the functional members to maintain adhesion strength. This local differentiation resolves both the wrinkle reduction and adhesion maintenance requirements.
Data Source
AI summary
To provide laminated glass that can significantly reduce air bubbles remaining inside.Laminated glass having a first glass substrate and a second glass substrate laminated to each other, which has a first interlayer disposed between the first glass substrate and the second glass substrate and being in contact with the first glass substrate, a second interlayer disposed between the first glass substrate and the second glass substrate and being in contact with the second glass substrate, first and second functional members disposed between the first interlayer and the second interlayer and being in contact with the first interlayer and the second interlayer, wherein the first and second functional members have a higher rigidity than the first and second interlayers, and the first and second functional members are spaced apart from each other by a distance d when the laminated glass is viewed in plan view, and said distance d is at least 15 mm.