Laminated Glass Interlayer Frame to Prevent Thin-Glass Breakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The silk screen printing of pigmented enamels on thin glass sheets for windshields leads to increased breakage rates and temperature inhomogeneity during bending, complicating the production of laminated glass with pigmented edge regions.
Innovation Solution
A pigmented edge region is applied to the interlayer film instead of the glass surface, using a thin PVB film with low plasticizer content, coated with pigments to provide UV protection without sintering, and combined with a plasticized PVB film to create a laminated glass structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If silk screen printing of pigmented enamels is applied on thin glass sheets, then pigmented edge regions are achieved, but breakage rates increase and temperature inhomogeneity occurs during bending
Solution Approach 1:
The patent introduces an interlayer film as an intermediary carrier for the pigmented frame, replacing direct glass surface printing. The interlayer film absorbs the pigmentation function while allowing the glass sheets to remain free of printed enamel layers, thereby eliminating the breakage and temperature inhomogeneity issues associated with printing directly on thin glass sheets.
Solution Approach 2:
The patent segments the pigmented frame function from the glass sheets and transfers it to a separate interlayer film component. This segmentation allows the glass sheets to be processed independently without the complications of printed enamel, while the interlayer film carries the pigmented frame design.
2Manufacturing precision
If silk screen printing of pigmented enamels is applied on thin glass sheets, then pigmented edge regions are achieved, but temperature inhomogeneity occurs during bending
Solution Approach 1:
The interlayer film serves as a mediator that carries the pigmented frame function without requiring high-temperature sintering on the glass surface. This eliminates the source of temperature inhomogeneity during the bending process, as the pigmentation is applied to the interlayer film rather than the glass.
3Weight of moving object
If thin glass sheets are used to minimize weight, then weight reduction is achieved, but breakage rates increase during printing and bending
Solution Approach 1:
The interlayer film acts as a protective intermediary that allows thin glass sheets to be used for weight reduction while preventing breakage. By transferring the pigmented frame function to the interlayer film, the thin glass sheets are freed from the mechanical stress and thermal stress of enamel printing and sintering processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method reduces breakage and temperature inhomogeneity issues, ensuring stable bending and adherence to safety standards while providing effective UV protection without the need for sintering enamels on glass surfaces.
Implementation Method 1
a pigmented band to protect the sealing or the adhesive which mechanically connects the windshield with the chassis from UV radiation
Implementation Method 2
thin PVB-films having a low or no plasticizer content with coatings or electrically conductive structures
Data Source
Figure 1~2
AI summary
The invention is directed to Laminated glass obtained by laminating at least one film A containing a polyvinyl acetal PA and optionally at least one plasticiser WA and at least one film B containing a polyvinyl acetal PB and at least one plasticiser WB between two glass sheets, characterised in that prior to lamination; - the amount of plasticiser WA in film A is less than 22 % by weight; - the amount of plasticiser WB in film B is at least 22 % by weight and - film A comprises at least on one surface a non-transparent region.