Recycled PET Cable Sheathing Tape With Controlled Unwinding

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Solution Overview

Problem

Existing adhesive tapes for cable sheathing in automobiles face challenges in achieving easy unwinding while maintaining good adhesive properties, particularly in high-temperature environments, and they often suffer from plasticizer migration leading to cable insulation embrittlement and premature failure.

Innovation Solution

An adhesive tape with a textile backing and a pressure-sensitive adhesive compound, using recycled polyethylene terephthalate fibers and a specific polymer dispersion, is designed to have adjustable unwinding forces and excellent cable compatibility across various temperature classes, minimizing plasticizer migration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If adhesive tapes are used to bundle and protect cable sets, then protective function and mechanical strength are improved, but unwinding difficulty and processing complexity increase

Engineering Contradiction:

Improveprotective functionVSAvoidunwinding ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies parameter changes by modifying the adhesive compound's formulation and application parameters to achieve optimal balance between adhesion strength and unwinding ease. The adhesive is applied in a controlled manner with specific thickness and composition to ensure it provides protection while allowing easy unwinding when needed.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamics by making the adhesive tape's bonding characteristics adaptable - the adhesive provides strong bonding during normal use but allows controlled release during processing or removal. This dynamic behavior resolves the contradiction between needing strong protection and easy unwinding.

Inventive Principle:

Principle #15Dynamics

2Temperature

If adhesive tapes provide strong adhesion under high temperature, then thermal resistance is improved, but plasticizer migration and cable insulation embrittlement worsen

Engineering Contradiction:

Improvethermal resistanceVSAvoidplasticizer migration

Core Design Contradiction:

TemperatureVSObject-affected harmful factors

Solution Approach 1:

The patent uses an intermediary approach by introducing a barrier layer or modified adhesive formulation that acts as a mediator between the adhesive tape and cable insulation. This intermediary prevents plasticizer migration while maintaining thermal resistance, resolving the harmful interaction between adhesive and cable materials at elevated temperatures.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the potential harm of plasticizer migration into a benefit by using the plasticizer migration test as a quality control mechanism. The adhesive formulation is specifically designed to resist plasticizer extraction, turning what could be a harmful interaction into a validated protective feature.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Strength

If adhesive compound is applied to textile backing, then adhesive strength is improved, but unwinding force control becomes difficult

Engineering Contradiction:

Improveadhesive strengthVSAvoidunwinding force control

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The patent applies parameter changes by precisely controlling the adhesive compound's formulation, thickness, and application parameters. By adjusting these parameters, the patent achieves the optimal balance where sufficient adhesive strength is provided for strong bonding while the unwinding force remains controllable and manageable during processing.

Inventive Principle:

Principle #35Parameter changes

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 ensures easy unwinding, strong adhesion, and resistance to plasticizer migration, providing reliable cable sheathing that maintains insulation integrity under stress and temperature variations.

Implementation Method 1

an adhesive compound applied to at least one side of the backing

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentEP4092092B1Adhesive tape for sheathing elongated goods, in particular cable sets and sheathing method

Publication Date: 2026.02.18 TESA SE

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Figure 3~4

AI summary

The application comprises an adhesive tape, in particular for wrapping cables, comprising a textile carrier and an adhesive compound applied to at least one side of the carrier, wherein the starting materials for the textile carrier are fibers made from recycled polyethylene terephthalate, wherein the proportion of recycled fibers is at least 50% by weight and wherein the fibers are staple fibers or continuous filaments or are processed into yarns.