The ZBY Combustion Tester for Flame-Retardant Paper and Paperboard is a high-precision, microcontroller-operated laboratory testing apparatus engineered to evaluate the flammability, char length, afterflame time, and afterglow time of flame-retardant treated, water-leached, coated, or printed paper and paperboard (thickness ≤ 1.6 mm).
Designed in compliance with GB/T 14656-2009, TAPPI T 461, ASTM D777, and GB/T 10739-2023, this tester features a standard 10 mm Bunsen burner with adjustable 0–45° tilt angles, automatic 12-second flame application, high-precision timing (±0.01 s resolution), and a digital display for tracking glowing combustion. It serves as an essential quality control instrument for specialty paper mills, protective packaging producers, and material testing laboratories.
Governing Standards & Test Method Compatibility
The ZBY Flame Resistance Tester allows accredited laboratories to certify paper and paperboard products according to multiple national and international flammability protocols:
| Standard Code |
Standard Description |
Testing Scope |
| GB/T 14656-2009 |
Test method for burning behaviour of flame-retardant paper and paperboard |
Primary national standard for assessing char length, afterflame, and afterglow of treated paper products |
| TAPPI T 461 |
Flame resistance of treated paper and paperboard |
Global pulp & paper association standard for fire-retardant paper materials |
| ASTM D777 |
Standard test method for flammability of treated paper and paperboard |
North American standard testing specification for paper products under 1.6 mm thickness |
| GB/T 10739-2023 |
Paper, board and pulp — Standard atmosphere for conditioning and testing |
Defines sample pre-conditioning environmental specifications prior to ignition testing |
Key Functional & Engineering Highlights
- Microcontroller Control & Precision Timing: Automated flame exposure timer preset to 12.00 seconds with ±0.01 s accuracy, eliminating manual operator timing error.
- Multi-Angle Adjustable Bunsen Burner: Features a standard Ø10 mm ± 0.2 mm inner diameter tube capable of tilting from 0° to 45° across 8 indexed steps (5° increments).
- Dual Digital Timer Readouts: Automatically captures and holds afterflame (flaming combustion) and afterglow (glowing combustion) durations up to 99 min 99 s.
- Integrated Flame Calibration: Includes a dedicated flame-height gauge to accurately adjust the blue propane inner flame between 15 mm and 175 mm.
- Corrosion-Resistant Test Chamber: Compact footprint (670 × 300 × 800 mm) housing rigid sample holders sized specifically for standard 210 mm × 70 mm specimens.
Technical Specifications of ZBY Paper Combustion Tester
| Test Specimen Dimensions |
210 mm × 70 mm (Thickness ≤ 1.6 mm) |
| Bunsen Burner Nozzle Diameter |
Inner diameter Ø10 mm ± 0.2 mm |
| Burner Inclination Angle |
0° to 45° adjustable (8 indexed positions in 5° steps) |
| Flame Application Time |
12 seconds (Accuracy: ±0.01 s) |
| Afterflame / Afterglow Timer |
0 to 99 min 99 s with digital display |
| Flame Height Adjustment |
15 mm to 175 mm (Blue flame), includes flame height gauge |
| Fuel Gas Supply |
Liquefied propane gas (Purity ≥ 95%) |
| Power & Dimensions |
AC 220 V ±10%, 50 Hz (<100 W); Overall size: 670 × 300 × 800 mm; Weight: ~40 kg |
Standard Operating Workflow
- Condition the paper/paperboard specimens (210 mm × 70 mm) in accordance with GB/T 10739-2023.
- Mount the specimen vertically into the specimen holder inside the combustion chamber.
- Adjust the Bunsen burner flame height using the provided ruler and tilt angle if required by the testing standard.
- Initiate the automatic test sequence: the burner applies the propane flame to the specimen for 12 seconds before returning.
- The digital controller logs the afterflame time and glowing combustion (afterglow) duration, allowing immediate recording of the specimen’s char length.
Frequently Asked Questions (FAQ)
Q1: What types of materials can be tested with the ZBY Combustion Tester?
A: It is designed for flame-retardant treated paper, water-leached paperboard, coated packaging paper, printed fire-resistant paper, and decorative wall paper with a thickness of 1.6 mm or less.
Q2: What is the significance of measuring “Afterglow Time”?
A: Afterglow (glowing combustion) measures the time a material continues to smolder or glow without a visible flame after the burner is removed. High afterglow indicates residual thermal risks in packaging or building materials.
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