Colorant Interlayer Film with Controlled Pummel Values for Laminated Glass
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Solution Overview
Problem
Laminated glass interlayer films containing colorants experience a decrease in adhesive force due to increased water content, leading to separation from the glass members, which is not effectively addressed by existing technologies.
Innovation Solution
The interlayer film is formulated with specific pummel value ranges at 0.4% and 1.5% water content, incorporating a thermoplastic resin, dispersants, and metallic salts to maintain adhesive force, using dispersants like acrylic, amine-based, and carboxylic acid-based dispersants, and adjusting dispersant content and molecular weights to prevent separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the interlayer film contains a colorant, then aesthetic quality is improved, but adhesive force decreases when water content increases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the water content range (0.4-1.5%) and adjusting the composition ratios of resin, plasticizer, dispersant, and colorant to maintain adhesive force while preserving aesthetic quality. This resolves the contradiction by finding the optimal parameter combination that prevents both separation and excessive water absorption.
Solution Approach 2:
The patent uses composite materials by combining multiple components (resin, plasticizer, dispersant, colorant) in specific proportions to create an interlayer film that simultaneously achieves good adhesion and aesthetic appearance. The composite structure allows each component to contribute its specific function while working together to resolve the contradiction between adhesion and appearance.
2Reliability
If the adhesive force is strong, then separation is prevented, but penetration occurs when glass breaks
Solution Approach 1:
The patent resolves this contradiction by changing the adhesive force parameter to an optimal range rather than maximizing it. The controlled water content (0.4-1.5%) and composition ratios ensure sufficient adhesion to prevent separation while maintaining enough flexibility and energy absorption capacity to prevent penetration during impact.
Solution Approach 2:
The patent applies the flexibility principle (analogous to spheroidality) by ensuring the interlayer film has appropriate mechanical flexibility through plasticizer content and composition control. This allows the film to deform and absorb impact energy rather than creating rigid bonds that would cause penetration, while still maintaining sufficient adhesion to prevent separation.
3Duration of action of moving object
If water content increases, then the interlayer film becomes more flexible, but adhesive force decreases
Solution Approach 1:
The patent resolves this contradiction by changing the water content parameter to a controlled range (0.4-1.5%) rather than allowing unlimited increase. This controlled moisture level provides sufficient flexibility for impact energy absorption while preventing excessive water content that would degrade adhesive force and cause separation.
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
The formulation maintains adhesive force and prevents separation of the interlayer film from laminated glass members even with increased water content, ensuring effective penetration resistance and aesthetic quality.
Implementation Method 1
it has been confirmed that a pummel value at a water content of 0.4% of 1 or more and 7 or less and a pummel value at a water content of 1.5% of 3 or more and 9 or less can be obtained by adjusting the composition of an interlayer film for laminated glass
Implementation Method 2
A widely-known laminated glass is one obtained by integrating a pair of glass plates with an interlayer film for laminated glass interposed between them and containing a resin component such as a polyvinyl acetal resin
Data Source
AI summary
An interlayer film for laminated glass of the present invention contains a colorant and has a pummel value at a water content of 0.4% of 1 or more and 7 or less and a pummel value at a water content of 1.5% of 3 or more and 9 or less. The laminated glass of the present invention includes a first laminated glass member, a second laminated glass member, and the interlayer film for laminated glass interposed between the first laminated glass member and the second laminated glass member. According to the present invention, the interlayer film for laminated glass which is capable of preventing, even when it contains a colorant and its water content increases, the occurrence of its separation from a laminated glass member due to a decrease in its adhesive force, and a laminated glass including such an interlayer film for laminated glass can be provided.