Laminated Glass Interlayer Film with Controlled Color Gradient
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional colored interlayer films for laminated glass lack consideration for uniformity and aesthetic quality in color shade changes across the film, resulting in inadequate aesthetic appeal.
Innovation Solution
The interlayer film for laminated glass is designed with specific control of L*, a*, and b* changes, along with visible light transmittance (Tv) differences, ensuring ΔL*+Δa*+Δb* ≥ 0.5 and ΔTv ≥ 0.1%, with varying resin layer thickness to achieve desired aesthetic effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional colored interlayer films are used with colored layers, then the transmittance can be reduced to protect passengers from direct sunlight, but the aesthetic quality is insufficient due to lack of control over color shade changes
Solution Approach 1:
The patent applies parameter changes by precisely controlling the color shade parameters (L*, a*, b*) and visible light transmittance (Tv) of the colored interlayer film. By establishing specific ranges for these parameters and their changes across the film surface, the invention transforms the conventional approach into a scientifically controlled process that simultaneously achieves both protection function and aesthetic quality
Solution Approach 2:
The patent implements local quality by allowing different regions of the interlayer film to have different color shades and transmittance values. The colored layer can have varying L*, a*, b* values at different positions, enabling gradient effects and localized aesthetic variations while maintaining overall protection performance
2Adaptability or versatility
If the color shade changes from one end to the other end of the interlayer film, then design flexibility is improved, but the control over color uniformity and aesthetic quality becomes difficult
Solution Approach 1:
The patent systematically controls parameter changes across the film by defining maximum allowable differences in L*, a*, b* values between different regions. This structured approach to parameter variation enables design flexibility while maintaining manufacturing precision through quantifiable control criteria
Solution Approach 2:
The patent establishes feedback mechanisms by measuring and evaluating the actual L*, a*, b* values and transmittance (Tv) of the produced interlayer film against predetermined standards. This quality control feedback ensures that color uniformity and aesthetic quality requirements are met while allowing for design variations
Data Source
Figure 1~4
Figure 5~7
AI summary
An interlayer film for laminated glass comprises one or more resin layers wherein at least one of the resin layers contains a colorant, and wherein when the absolute values of the differences between the maximum and minimum values of L*, a* and b* measured from one end to the other end of a laminated glass including two sheets of clear glass with a thickness of 2.5 mm bonded through the interlayer film for laminated glass are represented by ΔL*, Δa* and Δb*, respectively, the value of ΔL*+Δa*+Δb* is 0.5% or more.