Composite Cable Harness Tape for Impact Protection and Flexibility
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Solution Overview
Problem
Existing adhesive tapes for cable harnesses in motor vehicles face challenges in providing high mechanical protection against notching and impact while maintaining flexibility for wrapping around thin items, often resulting in stiffness and potential damage during installation in tight spaces.
Innovation Solution
An adhesive tape with a woven fabric carrier and a second textile carrier, where the adhesive layer is applied on the bottom side of the first carrier, which protrudes on both sides relative to the second carrier, ensuring secure wrapping and protection, with specific width configurations for optimal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive tapes use thick nonwovens or foams as carriers to obtain damping properties, then protection against impact exposure is improved, but the tape becomes stiff and difficult to wrap around thin items
Solution Approach 1:
The adhesive tape is divided into multiple functional layers: a flexible woven fabric carrier layer and a separate damping layer with adhesive. This segmentation allows each layer to perform its specific function - the woven fabric provides flexibility and structural integrity, while the damping layer provides impact protection, resolving the contradiction between stiffness and flexibility.
Solution Approach 2:
The tape uses a composite structure combining woven fabric (providing flexibility and strength) with damping material layers (providing impact protection). This composite approach allows the tape to simultaneously achieve both flexibility for wrapping around thin items and sufficient damping properties for impact protection, without the stiffness problems of thick nonwoven carriers.
2Strength
If adhesive tapes use abrasion-resistant woven fabrics with coatings to achieve protection against impact exposure, then mechanical protection is improved, but the tape becomes stiffer and may cause damage during installation in tight spaces
Solution Approach 1:
The tape structure separates the protective function into distinct layers: the woven fabric carrier provides abrasion resistance and structural strength, while the damping layer provides impact protection. This segmentation allows the tape to achieve high mechanical protection without requiring excessive thickness in a single layer, maintaining flexibility for installation in tight spaces.
Solution Approach 2:
The use of woven fabric carriers and thin damping layers creates a flexible protective structure that can be easily wrapped around cable harnesses in tight spaces without causing damage during installation, while still providing the required mechanical protection against abrasion and impact.
3Reliability
If adhesive tapes use film carriers to achieve protection against ingress of fluid, then protective function is improved, but damping properties are reduced
Solution Approach 1:
The tape combines a film layer (providing fluid ingress protection) with a woven fabric carrier and damping material layers (providing mechanical strength and impact protection). This composite structure allows the tape to simultaneously achieve both fluid protection and damping properties, resolving the contradiction between these two protective functions.
4Area of stationary object
If the adhesive layer width matches the carrier width, then coverage is maximized, but the tape becomes excessively stiff and difficult to handle during wrapping
Solution Approach 1:
The adhesive layer is applied selectively in specific regions rather than uniformly across the entire carrier width. This local application of adhesive provides sufficient bonding coverage in critical areas while leaving other areas less stiff, maintaining overall tape flexibility for easy handling and wrapping during installation.
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 tape achieves high mechanical protection and flexibility, preventing flagging and damage during wrapping, while ensuring reliable securement and protection against abrasion, noise, and impact, meeting stringent standards for abrasion resistance and noise damping.
Implementation Method 1
an adhesive layer (402) of adhesive (402) applied over the full area on the bottom side of the first carrier (401)
Data Source
AI summary
Adhesive tapes, especially for lengthwise jacketing of elongate items such as cable harnesses in motor vehicles and methods for producing and using said adhesive tapes are disclosed. Each adhesive tape comprises a carrier having a width BT based on the cross direction and at least one layer of adhesive applied on a bottom side of the carrier, wherein the adhesive layer bearing a second carrier, which has a lower width BSchutz than the width BT of the first carrier. The first carrier with the adhesive layer protrudes two-sidedly relative to the side edges of the second carrier, where the first protrusion has a width of BStart and the second protrusion has a width of BHülle. The first carrier is a woven fabric having a basis weight of 50 to 200 g/m2 and the second carrier is a textile carrier having a basis weight of 300 to 1000 g/m2.