Heat-Shielding Coated PVB Laminated Glass
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing laminated glass with heat-shielding properties face challenges such as the need for multiple layers of film, limited recyclability, difficulty in maintaining nanoparticle distribution, and increased complexity, which affect production costs and optical consistency.
Innovation Solution
A method involving thin films based on low or plasticizer-free polyvinyl acetal with a heat-shielding coating applied directly to the glass surface, combined with a layer of plasticized polyvinyl acetal, allowing for direct contact between the film and glass, enabling efficient heat-shielding without dispersing nanoparticles in the film volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nanoscale semiconductor particles are dispersed in the volume of the interlayer film to achieve heat-shielding properties, then heat-shielding functionality is provided, but the film recyclability is limited and production costs increase
Solution Approach 1:
The heat-shielding function is extracted from the bulk film material and concentrated into a surface coating layer. This allows the film itself to remain simple and recyclable, while the coating provides the heat-shielding properties. The coating can be applied to one or both sides of the film, creating a layered structure where the functional property is separated from the structural material.
Solution Approach 2:
The invention creates a composite structure combining a polyvinyl acetal film with a heat-shielding coating layer. The coating contains heat-absorbing or heat-reflecting materials (such as metal oxides or metallic layers) applied on top of the film, forming a multi-layer composite that provides both the structural integrity of the film and the heat-shielding functionality of the coating.
2Reliability
If nanoscale particles are distributed evenly throughout the film volume, then heat-shielding properties are achieved, but maintaining nanoparticle distribution during extrusion is difficult and agglomeration results in unacceptable haze
Solution Approach 1:
The nanoparticle dispersion problem is avoided by extracting the heat-shielding function to a surface coating rather than dispersing nanoparticles throughout the film bulk. The coating is applied after film production, eliminating the need to maintain nanoparticle distribution during the extrusion process and avoiding agglomeration-related haze issues.
Solution Approach 2:
The invention transitions from a three-dimensional volume dispersion of nanoparticles to a two-dimensional surface coating. By moving the heat-shielding functionality to the surface dimension, the complex problem of maintaining uniform distribution during bulk processing is avoided, while still achieving effective heat-shielding through the coating layer.
3Reliability
If at least 3 layers of film (1 x functionalized PET, 2 x PVB film) are used to achieve heat-shielding properties, then heat-shielding functionality is provided, but the structure becomes more complex and production costs increase
Solution Approach 1:
The invention merges the heat-shielding function with the existing film structure by applying a coating to the film surface, rather than requiring separate functionalized layers. This integration reduces the total number of layers needed, as the coating provides heat-shielding without requiring an additional functionalized PET layer or multiple PVB layers with embedded particles.
Solution Approach 2:
A composite structure is created by combining a standard polyvinyl acetal film with a heat-shielding coating. This composite approach provides heat-shielding functionality while maintaining film simplicity, avoiding the need for multiple complex layers of functionalized materials.
4Reliability
If printing heat-absorbing nanoparticles on PVB film is used to achieve heat-shielding, then heat-shielding properties are provided, but adhesion properties to glass surface are affected and optical consistency is compromised
Solution Approach 1:
The invention extracts the heat-shielding function to a dedicated coating layer applied on the film surface, rather than printing nanoparticles directly on the film. This separation ensures that the film's adhesion and optical properties remain unaffected, while the coating provides the heat-shielding function independently.
Solution Approach 2:
By moving the heat-shielding functionality to a surface coating dimension rather than integrating it into the film bulk or printing it on the film surface, the invention preserves the film's inherent adhesion and optical properties. The coating is applied in a controlled manner that maintains optical consistency while providing heat-shielding.
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 approach achieves effective heat-shielding properties while maintaining the required safety features of laminated glass, reducing production complexity and costs, and ensuring optical consistency by applying a heat-shielding coating to the surface of one film, which is then bonded between glass panes.
Implementation Method 1
thin IR-absorbing or IR-reflecting coated PET films
Implementation Method 2
thin IR-absorbing or IR-reflecting coated PET films
Implementation Method 3
heat-shielding properties
Implementation Method 4
thin films based on low or plasticizer-free polyvinyl acetal with at least one heat-shielding layer arranged thereon can be melted directly onto one of the glass surfaces
Implementation Method 5
bonding two transparent panes with at least one film A and at least one film B
Data Source
AI summary
The invention relates to a process for producing laminated glass composites that provide heat-shielding, by adhesive bonding of two transparent panes with at least one foil A and with at least one foil B, characterized in that the foils A and B are positioned between the two transparent panes and bond these adhesively to one another, where foil A is a polyvinyl acetal PA and comprises from 0 to 16% by weight of at least one plasticizer WA, and also a coating that provides heat shielding, and foil B is a polyvinyl acetal PB and comprises at least 16% by weight of at least one plasticizer WB.