Introduction to the 針炎テスト

The Needle Flame Test is a standardized flammability assessment designed to evaluate the fire resistance of materials and components used in electrical and electronic equipment. This test simulates small ignition sources, such as overheated components or electrical faults, to determine whether a material sustains combustion or self-extinguishes within specified parameters. Compliance with international flammability standards, including IEC 60695-11-5, UL 94, and GB/T 5169.5, is critical for manufacturers across industries such as automotive electronics, household appliances, and aerospace components.

その リスン ZY-3 Needle Flame Test Apparatus is a precision instrument engineered to conduct these assessments with high repeatability and adherence to regulatory requirements. Its design ensures controlled flame application, accurate timing, and reproducible results, making it indispensable for quality assurance and certification processes.

Testing Principles and Methodology

Flame Application and Observation Criteria

The Needle Flame Test involves exposing a test specimen to a calibrated flame from a butane-fed needle burner for a predetermined duration (typically 30 seconds). The flame is applied at a 45° angle, and post-ignition behavior is monitored for:

• Afterflame Time (t₁): Duration of sustained combustion after flame removal.
• Afterglow Time (t₂): Persistent glowing post-flame extinction.
• Damage Length: Charred or melted extent along the specimen.

Materials are classified based on their reaction:

Key Components of the LISUN ZY-3 Apparatus

その LISUN ZY-3 integrates advanced features to ensure compliance with IEC 60695-11-5 and related standards:

• Adjustable Flame Height: 12 ± 1 mm (calibrated via a precision gauge).
• Programmable Timer: 0–999.9s with ±0.1s accuracy.
• Specimen Holder: Adjustable for vertical/horizontal positioning.
• Gas Flow Control: Butane supply with pressure stabilization (0.1 MPa ± 5%).
• Safety Mechanisms: Flame arrestors and exhaust ventilation.

Industry Applications and Compliance Requirements

Electrical and Electronic Equipment

Components such as PCBs, connectors, and insulating materials must resist ignition from internal faults. The ZY-3 verifies compliance with IEC 62368-1 (AV/IT equipment) and IEC 60730 (automatic controls).

Automotive Electronics

Flammability risks in wiring harnesses, control modules, and infotainment systems necessitate adherence to ISO 3795 and FMVSS 302. The ZY-3’s repeatability ensures consistency across production batches.

Medical Devices

Materials in enclosures or wearable electronics must meet ISO 10993-10 biocompatibility and UL 94 V-0 ratings to minimize fire hazards in oxygen-rich environments.

Aerospace and Aviation

Cabin components, such as seat fabrics and overhead panels, are tested per FAR 25.853. The ZY-3’s controlled flame application aligns with Airbus ABD0031 and Boeing BSS 7239.

Competitive Advantages of the LISUN ZY-3

1. Enhanced Reproducibility: Automated flame positioning reduces operator-dependent variability.
2. Multi-Standard Compatibility: Configurable for IEC, UL, GB, and ISO requirements.
3. Data Logging: Integrated software records test parameters for audit trails.
4. Durability: Stainless steel construction resists corrosion in lab environments.

Case Study: Insulation Material Testing

A manufacturer of industrial control systems tested silicone rubber gaskets using the ZY-3. Results demonstrated a V-0 classification (afterflame < 2s), validating suitability for high-temperature applications.

FAQ Section

Q1: What is the typical calibration frequency for the ZY-3?
A: Annual calibration is recommended, with monthly flame height verification per IEC 60695-11-5.

Q2: Can the ZY-3 test non-planar specimens?
A: Yes, the adjustable holder accommodates irregular shapes (e.g., cable jackets).

Q3: How does the ZY-3 compare to horizontal/vertical flame testers?
A: The needle flame test simulates small ignition sources, whereas larger flame tests assess bulk material behavior.

Q4: Is butane the only permitted fuel source?
A: Per IEC 60695-11-5, butane (≥95% purity) is mandatory for standardized results.

Q5: What industries mandate needle flame testing?
A: Telecommunications (EN 50399), lighting (IEC 60598), and consumer electronics (IEC 62368-1) commonly require it.