- All
- Product Management
- News and Information
- Introduction content
- Enterprise outlets
- Frequently Asked Questions
- Corporate Video
- Company Portfolio
News details
Jinxi Popular Science | Is PA6 Sold as PA66? Three Quick Ways to Distinguish Authenticity!
Release time:
2026-05-28
01 Method 1: Burning Test (On-site Rapid Identification)
This is the most intuitive and quickest method: simply take a small sample and ignite it with a lighter. Note, however, that this method works poorly for blended materials and carries certain safety risks.
| Identification Features | PA6 (Nylon 6) | PA66 (Nylon 66) | Reliability |
|---|---|---|---|
| Flame Color | Pale yellow / light yellow | Blue | Medium-High |
| Odor | Burnt wool & fingernail odor (Both produce this smell, hard to distinguish) | Burnt wool & fingernail odor | Low |
| Melt Drawing | Capable of filament drawing; drawn fiber does not shrink | Capable of filament drawing; fiber shrinks noticeably upon cooling | Medium |
| Combustion Behavior | Yellow flame tip with blue base, molten dripping, foaming | Yellow flame tip with blue base, molten dripping, foaming | — |
02 Method 2: Professional Instrument Testing (Precision Laboratory Identification)
For disputed cases or applications with stringent requirements, precise chemical composition analysis relying on professional instruments is required, with an accuracy rate close to 100%.
| Test Method |
Principle | Advantages |
|---|---|---|
| Melting Point / Thermal Analysis (DSC) | PA6 and PA66 have distinct melting points: PA6 melts at 215–225 °C, while PA66 ranges from 255–265 °C. Precise identification can be achieved via DSC testing. | Test normally completed within 1–2 days; fast and reliable, an effective method for authenticity verification. |
| Pyrolysis & Spectroscopic Analysis | Adopt GC-MS, FTIR and other instruments to analyze characteristic fingerprint spectra of small pyrolytic fragments or specific functional group absorption peaks (e.g., amide bonds) generated under high temperature, enabling accurate differentiation of nylon grades. | Authoritative test results, acceptable as arbitration evidence.
|
03 Method 3: Physical Observation Method (Auxiliary Identification via Appearance Inspection)
This method serves only as a preliminary screening measure and cannot be adopted as the final judgment basis.
Cross-section Inspection (Most Intuitive):
Visual Appearance Check:
Relevant information
Exploring the Benefits of PPS Plastic in Electrical and Electronic Applications
PPS (Polyphenylene Sulfide) plastic is increasingly gaining recognition in the electronic and electrical components sector due to its remarkable properties. It is a high-performance thermoplastic known for its excellent thermal stability, chemical resistance, and electrical insulating capabilities. These characteristics make PPS plastic an ideal choice for a variety of applications, particularly i
Learn more
Anhui Jinxi New Materials Technology Co., Ltd.
Contact Us