Partially Translucent Polypropylene Vehicle Panel With Perforated Coating
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Solution Overview
Problem
Existing plastic panels for vehicle front grilles, typically made of PMMA, polycarbonate, or acrylic glass, face challenges in meeting pedestrian protection and pendulum test requirements due to their material properties.
Innovation Solution
A method involving a base body of polypropylene plastic with a transparent or translucent coating, perforated to enable translucency, sealed with a polyurethane layer, and optionally enhanced with decorative or functional films and light sources, to produce a partially translucent panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If transparent or translucent plastic materials (PMMA, polycarbonate, acrylic glass) are used for the base body, then the panel achieves good translucency and design flexibility, but the mechanical properties and safety compliance (pedestrian protection, pendulum tests) deteriorate
Solution Approach 1:
The patent uses a composite structure combining a polypropylene base body with a transparent or translucent coating layer. The polypropylene provides the necessary mechanical strength and safety compliance, while the coating layer delivers the desired translucency and design flexibility. This composite approach resolves the contradiction by integrating materials with complementary properties.
2Adaptability or versatility
If an opaque coating is applied to the visible side of the base body, then design flexibility and appearance are improved, but the translucency of the base body deteriorates
Solution Approach 1:
The patent applies a transparent or translucent coating rather than a fully opaque one, creating local quality variation where the coating provides design flexibility and appearance enhancement while maintaining light transmission properties. The coating can have different optical properties in different regions or layers, allowing both aesthetic customization and translucency to coexist.
3Illumination intensity
If perforations are introduced into the coating to enable translucency, then the translucency is improved, but the structural integrity and sealing requirements of the coating deteriorate
Solution Approach 1:
The patent introduces a plurality of perforations through the coating layer to enable translucency while maintaining structural integrity. The perforations are designed with specific dimensions, distribution patterns, and geometries that allow light transmission while preserving the coating's protective and sealing functions. The coating material and application method are selected to ensure that the perforated structure maintains adequate strength and reliability.
Data Source
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AI summary
The invention relates to a method for producing a partially translucent front panel for a vehicle, comprising the following steps: providing a base body (1) defining the front panel, wherein the base body (1) consists of a plastic material that is transparent or translucent to visible light and has a designated visible side (A) and a rear side (B) opposite the visible side (A); applying at least one opaque coating (2) to the visible side (A) of the base body (1); introducing a plurality of perforations (3) into the coating, wherein the perforations (3) completely penetrate the coating (2) to thereby enable translucency of the base body (1); applying a sealing layer (4) sealing the coating (2) and the perforations (3), wherein the sealing layer (4) comprises polyurethane or is made of polyurethane;wherein the transparent or translucent plastic material of the base body (1) comprises or is polypropylene.,