Aromatic Polyamide Cable Wrap Tape for Cut and Impact Resistance
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Solution Overview
Problem
Adhesive tapes for wrapping cables in automobiles face challenges in providing adequate puncture resistance and impact resistance while maintaining high abrasion resistance, noise-damping properties, and ease of processing, particularly in scenarios like side impacts where electrical cables may be cut or damaged.
Innovation Solution
The adhesive tape features a textile substrate band with a woven fabric layer facing outward and a nonwoven layer made from aromatic polyamides, such as Kevlar or Twaron, facing inward, which enhances impact and cut resistance, and a polymer layer or adhesive connecting the two, allowing the woven fabric to absorb abrasion stresses and the nonwoven to absorb impact and cutting stresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a nonwoven layer made from conventional materials is used, then the tape provides adequate abrasion resistance, but the impact resistance and cut resistance are insufficient
Solution Approach 1:
The patent applies composite materials by combining a nonwoven layer made from aromatic polyamide (such as Kevlar or Twaron) with the existing woven fabric layer. The aromatic polyamide nonwoven provides superior impact resistance and cut resistance compared to conventional materials, while the woven fabric layer maintains abrasion resistance. This composite structure resolves the contradiction by selecting materials with complementary protective properties.
2Strength
If additional protective layers are added to increase impact resistance, then the puncture resistance improves, but the device complexity increases
Solution Approach 1:
The patent makes the nonwoven layer multi-functional by selecting aromatic polyamide material that simultaneously provides impact resistance, cut resistance, and puncture resistance. This single nonwoven layer performs multiple protective functions that would otherwise require separate layers, thereby improving puncture resistance without increasing device complexity.
Data Source
AI summary
The subject matter of the invention is an adhesive tape, in particular a wrapping tape for sheathing cables (1) in automobiles, comprising a strip-type fabric backing (2, 3) that has at least one first layer (2) made of a woven fabric and a second layer (3) made of a nonwoven, the two layers being coupled together by a polymer layer (4) and/or by threads that penetrate both layers (2, 3), and comprising an adhesive layer (5) applied to at least one side of the backing (2, 3), characterised in that the nonwoven is produced from an aromatic polyamide.