Adhesive Tape for Cable Harnesses with Low Tg Acrylate
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Solution Overview
Problem
Existing adhesive tapes for cable harnesses in automobiles face challenges in achieving easy unwinding while maintaining good flagging resistance and compatibility across all temperature classes, as properties like adhesion and unwinding force are often mutually exclusive.
Innovation Solution
An adhesive tape with a textile carrier and a pressure-sensitive adhesive composed of 98.0 to 99.0% n-butyl acrylate and/or 2-ethylhexyl acrylate, along with specific ethylenically unsaturated monomers like acrylic acid, formulated to have a glass transition temperature below +15 °C, ensuring strong adhesion and removability without adhesive resins, and optionally enhanced with light stabilizers and anti-aging agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive tapes with good adhesion strength are used to ensure flagging resistance, then flagging resistance is improved, but unwinding force increases making the tape difficult to unwind
Solution Approach 1:
The patent applies parameter changes by carefully controlling the glass transition temperature of the pressure-sensitive adhesive to be below +15°C. This temperature parameter optimization allows the adhesive to maintain strong bonding (good flagging resistance) while remaining sufficiently soft and pliable for easy unwinding and application. The specific monomer composition (98-99% n-butyl acrylate and/or 2-ethylhexyl acrylate with 1-2% ethylenically unsaturated monomer) is designed to achieve this precise temperature window that balances both requirements.
2Strength
If robust carrier materials are used to protect cables against abrasion, then abrasion resistance is improved, but the tape becomes stiffer affecting unwinding and bending
Solution Approach 1:
The patent employs composite materials by combining a textile carrier (providing abrasion resistance and structural strength) with a specifically formulated pressure-sensitive adhesive layer (providing flexibility and ease of handling). This composite structure allows the tape to maintain the strength needed for cable protection while the adhesive layer contributes to overall flexibility, enabling easy unwinding and bending around cable bundles without excessive stiffness.
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 adhesive tape provides excellent flagging resistance, easy unwinding, and compatibility across all four temperature classes, ensuring a flexible and durable cable harness wrapping solution.
Implementation Method 1
The adhesive tapes are used to bundle a large number of electrical cables... high adhesive strength... the adhesive connection can hold up even under the influence of tension
Implementation Method 2
formulated to have a glass transition temperature below +15 °C, ensuring strong adhesion and removability without adhesive resins
Data Source
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AI summary
The invention relates to an adhesive tape for, in particular, wrapping cables, made from preferably a textile support and from an adhesive mass which is in the form of a dried polymer dispersion and which is applied to at least one side of the support. The polymer is made from: (a) 95.0 - 100.0wt.% n-butylacrylate and/or 2-ethylhexylacrylate, (b) 0.0 - 5.0 wt.% ethylenically unsaturated monomer having an acid or acid anhydride function.