What Is Metal Detector?
Direct Answer
A metal detector in hygiene manufacturing is an in-line QC device that screens finished products for metal fragments from broken needles or machine wear.
Key Takeaways
- A metal detector in hygiene manufacturing is an in-line QC device that screens finished products for metal fragments from broken needles or machine wear.
- How it works: The detector passes every product or its raw stream through an electromagnetic field and auto-ejects any item with detectable ferrous or non-ferrous metal..
- Final-bag metal detection on diaper lines
- Detection catches common metals, but very small non-ferrous fragments may pass below threshold
How Metal Detector Works
The detector passes every product or its raw stream through an electromagnetic field and auto-ejects any item with detectable ferrous or non-ferrous metal.
Examples and Applications
- Final-bag metal detection on diaper lines
- Raw material screening for SAP and fluff
Metal Detector vs. Related Terms
| Term | What it is | Key difference |
|---|---|---|
| Online vision inspection | Metal Detector | Vision detects shape/color defects; metal detection targets metallic contaminants |
Limitations and Common Misconceptions
- Detection catches common metals, but very small non-ferrous fragments may pass below threshold
- It does not replace visual and X-ray inspection for other foreign matter
Why do diaper factories use metal detectors?
To catch metal fragments from broken needles or machine parts before they reach consumers — a core food- and baby-product safety checkpoint.
References
- EDANA - What are nonwovens? (ISO 9092 / CEN EN 29092 definition) — EDANA (accessed 2026-08-02)
- JP CIA (industry) - Baby diaper material: key components and their functions — 行业媒体 (accessed 2026-08-02)