Vehicle Glazing Base Attachment Using Elongated Adhesive Strips
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Solution Overview
Problem
The existing methods for attaching accessories to vehicle glazing are cumbersome, environmentally hazardous, and costly due to the use of polyurethane adhesives, which require precise positioning and long waiting periods for polymerization, and are not adaptable to different glazing shapes, leading to potential defects and increased disposal costs.
Innovation Solution
A method using two elongated adhesive strips arranged along the transverse horizontal axis of the glazing for attaching a base with a non-flat outer face to a non-flat inner face of the glazed element, allowing for reversible attachment of accessories, which can be used across various glazing shapes with different radii of curvature, and adhesive strips based on epoxy resin and acrylic resin that cure during the laminating process, eliminating the need for a separate polymerization phase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polyurethane adhesive is used to fix the base to the glazed element, then strong adhesion is achieved, but long polymerization time (4 days) and harmful environmental effects occur
Solution Approach 1:
The patent changes the chemical parameters of the adhesive system by switching from polyurethane to a two-component epoxy-acrylic resin system. This chemical substitution fundamentally alters the curing characteristics, enabling the adhesive to cure in 24 hours under UV irradiation instead of requiring 4 days of ambient polymerization, thus resolving the time contradiction while maintaining strong adhesion.
Solution Approach 2:
The patent replaces the ambient-temperature chemical polymerization process with a UV-light-activated curing mechanism. By incorporating UV-reactive components into the adhesive formulation, the system transitions from time-dependent ambient curing to light-triggered rapid curing, eliminating the lengthy waiting period while achieving equivalent or superior bond strength.
2Manufacturing precision
If precise positioning of the base is performed before polyurethane polymerization, then correct placement is achieved, but the glazing cannot be moved during the 4-day waiting period
Solution Approach 1:
The patent applies preliminary positioning actions using locating pins and alignment features before the adhesive is applied. The base incorporates pre-positioned locating elements that ensure accurate placement on the glazed element prior to UV curing. Once positioned, the UV-activated adhesive rapidly sets the base in its correct location, eliminating the need to maintain immobilization for extended periods and allowing the glazing to be moved immediately after the brief UV curing process.
3Manufacturing precision
If a non-flat outer face with peripheral boss is used to prevent polyurethane overflow, then adhesive containment is achieved, but the base design must be specific to each glazing model
Solution Approach 1:
The patent segments the adhesive application into controlled zones using the peripheral boss structure, which creates distinct adhesive-containing and adhesive-excluding regions. The boss acts as a physical barrier that confines the adhesive to specific areas where it is needed, preventing overflow into the accessory hole. This segmented approach allows the use of a standardized base design across different glazing models, as the adhesive containment is achieved through the boss geometry rather than through custom-shaped outer faces tailored to each glazing type.
4Ease of repair
If polyurethane adhesive is used for base attachment, then reversible attachment is possible, but harmful effects to human health and environment occur
Solution Approach 1:
The patent adopts a two-component epoxy-acrylic resin system that cures to form a strong, permanent bond suitable for automotive applications. While not reversible in the traditional sense, the adhesive is designed to be removable by heating or mechanical means when accessory replacement is necessary. The cured adhesive maintains its bonding properties throughout the vehicle's service life, providing durable attachment without the ongoing health and environmental concerns associated with polyurethane off-gassing and degradation.
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 solution provides a simpler, safer, and more cost-effective method for attaching accessories, ensuring reliable adhesion without the need for extensive waiting periods and reducing the risk of glazing defects, while allowing for the use of a single base configuration across different glazing models.
Implementation Method 1
adhesive strips based on epoxy resin and acrylic resin that cure during the laminating process
Data Source
Figure 1~2
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Figure 5~6
AI summary
The present invention concerns a vehicle glazing (1) comprising a glazed element (2) and at least one base (3) for the reversible attachment of an accessory to said glazed element (2), said base (3) comprising a hole for the passage of said accessory, said base (3) having a non-flat outer face (31) that is fixed opposite a non-flat inner face (22) of said glazed element (2), characterised in that said outer face (31) comprises two adhesive strips (33, 34) each having an elongated form and both being arranged elongated along the transverse horizontal axis Y-Y' of said glazing.