There are three mainstream shielding structures in the industry, with clear performance ranging from low to high.
1. Single layer aluminum foil shielding (weakest)
Structure: The core wire is wrapped with a layer of aluminum foil and a ground wire
Advantages:
Full coverage without dead corners, high frequency anti-interference is also good
Cheap price, thin wire, suitable for fixed wiring
Disadvantages:
Completely unable to withstand low-frequency magnetic field interference
Aluminum foil is prone to breakage, and after bending several times, the shielding will directly fail
Cannot drag chains, cannot move, cannot vibrate
Applicable to: ordinary weak current, indoor communication, and environments without frequency converters
2. Single layer copper braided shielding (medium, commonly used in industry)
Structure: Tin plated copper braided mesh on the outer layer of the core wire
Performance only depends on one data: weaving density
60% density: entry-level, only slightly anti-interference
80% density: sufficient for conventional industries
90% -95% Density: Industrial High Quality, Anti Interference and Stable
Advantage:
Soft and durable, suitable for mobile wiring of equipment
The shielding effect of low-frequency magnetic field is much better than that of aluminum foil
Grounding is continuous and not easily broken
Disadvantages: The woven mesh has small mesh holes, and ultra-high frequency interference cannot be completely blocked
Applicable: Ordinary automation equipment, PLC control lines, sensor lines
3. Aluminum foil+copper braided double shielding (strongest, heavy-duty specific)
Double layer structure of inner aluminum foil and outer copper mesh
This is currently the highest anti-interference configuration for both civilian and industrial use
Inner aluminum foil: 100% coverage, blocking high-frequency interference
Outer copper weaving: suppresses low-frequency magnetic fields and protects aluminum foil from being broken
Advantage:
Full frequency anti-interference (high and low frequency universal)
Resistant to bending, vibration, and oil stains
Heavy industry, frequency conversion intensive environment without floating signal
Applicable: frequency converter matching, servo equipment, medical instruments, precision testing equipment, chemical plants, metallurgical equipment
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