Trioxane-Modified Interlayer for Glass Lamination Film
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Solution Overview
Problem
Multilayer films for laminating glass often experience melt fracture during extrusion, leading to optical defects like distortion, and existing solutions fail to simultaneously enhance moisture resistance and optical properties.
Innovation Solution
Incorporating a trioxane-based compound, such as 2,4,6-tripropyl-1,3,5-trioxane, into the interlayer of the film, which improves fluidity and reduces melt fracture, while maintaining moisture resistance and optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multilayer films for laminating glass are extruded, then the film can be manufactured, but melt fracture occurs leading to optical defects like distortion
Solution Approach 1:
The patent changes the chemical composition parameter of the interlayer by incorporating a trioxane-based compound (specifically 2,4,6-tripropyl-1,3,5-trioxane) at controlled concentrations (0.01-5 wt%). This parameter change modifies the rheological properties of the polymer melt during extrusion, reducing melt fracture and improving optical quality while maintaining manufacturability
Solution Approach 2:
The patent creates a composite interlayer material combining polyvinyl acetal resin with a trioxane-based compound. This composite formulation leverages the fluidity-enhancing properties of the trioxane compound while maintaining the adhesive and structural properties of the polyvinyl acetal, resolving the contradiction between ease of manufacture and manufacturing precision
2Productivity
If the interlayer composition is modified to improve fluidity, then melt fracture is reduced, but moisture resistance may be compromised
Solution Approach 1:
The patent carefully controls the concentration parameter of the trioxane-based compound within a specific range (0.01-5 wt%, preferably 0.1-2 wt%). This precise parameter control optimizes fluidity improvement while preventing excessive compound content that could compromise moisture resistance, thus resolving the contradiction between productivity and reliability
Solution Approach 2:
The trioxane-based compound is specifically localized in the interlayer portion of the multilayer film, particularly at the interfaces between the interlayer and glass sheets. This local concentration provides fluidity benefits where needed during extrusion while maintaining overall moisture resistance properties of the film structure
3Ease of operation
If plasticizer content is increased to improve flexibility, then the film becomes more pliable, but the structural integrity may be reduced
Solution Approach 1:
The patent creates a composite system where the trioxane-based compound works synergistically with the polyvinyl acetal resin and plasticizer. The trioxane compound enhances fluidity and processability without interfering with the plasticizer-resin interaction, allowing optimal plasticizer content to be maintained for flexibility while preserving structural integrity through the stabilizing presence of the trioxane compound
Data Source
AI summary
A film for laminating glass includes a first surface layer, a second surface layer opposite the first surface layer, and an interlayer disposed between the first surface layer and the second surface layer, wherein the interlayer includes a trioxane-based compound.