Mineral-Core Cable Tie With Self-Locking Fire Resistance

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Solution Overview

Problem

Existing fire-resistant cable ties fail to maintain their functionality and structural integrity during a fire, as they are either too wide for bending, lack self-locking mechanisms, or use materials that burn easily, posing risks to electrical systems.

Innovation Solution

A fire-resistant cable clamp with a core made of continuous fire-resistant mineral material, such as basalt or ceramic fibers, coated with a polymer that maintains its structural integrity even when the polymer material burns, featuring a self-locking mechanism and easy installation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If polyamide-based materials are used for cable ties, then ease of manufacture and flexibility are improved, but fire resistance deteriorates as polyamide is easily burnable

Engineering Contradiction:
Improveease of manufactureVSAvoidfire resistance
Core Design Contradiction:
Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The cable tie uses a composite structure with a fire-resistant mineral core (ceramic or basalt fiber) coated with polymer material. This composite design combines the fire resistance of mineral materials with the flexibility and ease of manufacture of polymers, resolving the contradiction between ease of manufacture and fire resistance.

Inventive Principle:
Principle #40Composite materials

2Object-affected harmful factors

If flame-retardant straps are used for telecommunication cables, then fire resistance is improved, but adaptability deteriorates as they are too wide for bending

Engineering Contradiction:
Improvefire resistanceVSAvoidadaptability
Core Design Contradiction:
Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The cable tie uses a thin polymer coating over a mineral core, creating a flexible structure that can be bent and tightened around cables of various sizes. This flexible shell design maintains fire resistance while enabling adaptability for different cable types and installation scenarios.

Inventive Principle:
Principle #30Flexible shells and thin films

3Object-affected harmful factors

If ceramic cable ties are used for fire protection, then fire resistance is improved, but device complexity deteriorates as they lack self-locking mechanisms

Engineering Contradiction:
Improvefire resistanceVSAvoiddevice complexity
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The invention merges the fire-resistant mineral core with a polymer coating that incorporates modern self-locking mechanisms. This combination integrates the fire protection function with the ease-of-use self-locking feature in a single unified structure, reducing device complexity while maintaining fire resistance.

Inventive Principle:
Principle #5Merging (Combining)

4Object-affected harmful factors

If materials that delay deterioration in fire are used, then fire resistance is improved, but reliability deteriorates as no attachment means remain after severe fire

Engineering Contradiction:
Improvefire resistanceVSAvoidreliability
Core Design Contradiction:
Object-affected harmful factorsVSReliability

Solution Approach 1:

The invention extracts the fire-resistant functional core from the polymer material, creating a mineral core that maintains structural integrity independently. The polymer coating serves only as a protective layer that can burn away, leaving the mineral core intact to continue providing attachment functionality even after severe fire exposure.

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentEP4329120A1Fire resistant cable tie
Publication Date: 2024.02.28 NEXANS SA
  • EP4329120A1 patent drawingFigure 1~3
  • EP4329120A1 patent drawing
  • EP4329120A1 patent drawing

AI summary

The present invention relates to a hose clamp comprising a structure (1) having a relief (2), typically a notched relief, and a through opening (3) adapted to cooperate with said relief (2) to close the hose clamp, characterized in that said structure (1) comprises at least one core (4) having a through orifice (5), the orifice and the through opening (5,3) of the structure (1) defining a passage to retain the relief (2), said core (4) comprising at least one continuous thread of fire-resistant mineral material, said core (4) delimiting said through orifice (5) and extending continuously to the relief (2), and in that said core (4) is coated in whole or in part by a polymer material (8).