PET Panel Fixing by Plastic Welding for Adhesive-Free Recycling
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Solution Overview
Problem
Existing methods for attaching needle punched PET panels to walls or furniture often damage the panels when removed, and the use of adhesives contaminates the panels, preventing them from being recycled.
Innovation Solution
A method involving plastic welding of PET fixing components to the rear surface of PET panels, allowing these components to be securely attached to complementary components on a support without adhesives, enabling easy recycling of the panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is used to attach PET panel to support, then the panel is securely fixed, but the panel cannot be recycled due to contamination
Solution Approach 1:
The harmful adhesive is extracted from the attachment system and replaced with a mechanical fixing component made of PET. The fixing component is attached to the panel rear surface through plastic welding, creating a secure mechanical connection without chemical contamination that would prevent recycling.
Solution Approach 2:
The attachment method changes from chemical bonding (adhesive) to mechanical bonding (fixing component). The fixing component is made from the same PET material as the panel, and is attached through plastic welding, changing the fundamental parameter of attachment mechanism while maintaining recyclability.
2Object-affected harmful factors
If screws are used to attach PET panel to support, then the panel can be removed and recycled, but the panel is damaged and becomes unsightly
Solution Approach 1:
The attachment system is segmented into two parts: a fixing component attached to the panel rear surface, and a complementary component attached to the support. This segmentation allows the panel face to remain intact and undamaged, preserving its appearance while enabling removal and recycling.
Solution Approach 2:
The attachment mechanism is moved from the panel front surface to the panel rear surface. By attaching the fixing component to the rear surface through plastic welding, the attachment hardware is hidden from view, preserving the panel's aesthetic appearance on the visible front surface.
3Strength
If adhesive is used to secure PET panel, then the panel is firmly attached, but removal damages the underlying support
Solution Approach 1:
The adhesive is extracted from the system and replaced with a mechanical fixing component. The fixing component creates a mechanical interlock between the panel and support without chemical bonding, allowing removal without damaging the underlying support structure.
Solution Approach 2:
The fixing component acts as an intermediary between the panel and the support. It is attached to the panel through plastic welding and connects to the complementary component on the support, distributing attachment forces and preventing direct damage to the support structure during removal.
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 allows for the secure attachment and subsequent recycling of PET panels without contamination, preserving the material's recyclability and maintaining the panel's integrity during removal.
Implementation Method 1
a PET fixing component is attached to the rear surface of the PET panel by plastic welding
Implementation Method 2
The preferred method of plastic welding is friction/spin welding
Implementation Method 3
The preferred method of plastic welding is friction/spin welding particularly if the components are to be welded on site
Data Source
AI summary
A method of recycling/upcycling needle punched PET panels or baffles makes use of a plurality of injection moulded PET components capable of being attached to a needle punched PET panel by plastic welding and to be removably attachable to complementary components fixed or fixable to a support. Spin welding allows the injection moulded PET components to be installed on site or in the factory. The PET panel with its now welded PET components can be press fitted to the complementary components fixed on the wall. A modified form of PET fixing component allows for a suspended baffle or panel. The PET panel or baffle with its PET components welded thereto can be recycled/upcycled without needing to remove the PET components from the panel as they are uncontaminated by any adhesive.