Plastic And Foam Horizontal/Vertical Burning Tester
 
 
Product Introduce
 
UL94 horizontal/vertical burning tester is a kind of testing equipment specially used to evaluate the flame retardant properties of plastics and foam materials. It is widely used in electronic and electrical, household appliances, automotive parts, building materials and other industries. The tester classifies the combustion characteristics of materials according to the UL94 standard, including horizontal combustion (HB), vertical combustion (V0-V2), harsh environment combustion (5VA/5VB), etc. It is also suitable for special tests of foam materials (HF1-HF2) and film materials (VTM0-VTM2).
The equipment not only complies with the US UL94 standard system, but also is compatible with many international standards, such as IEC 60695-11-10 (fire hazard test), ISO 9772/9773 (foam and thin material combustion test), ASTM D635/D4804 (plastic and foam combustion performance test), etc. In addition, it is also applicable to regional standards such as German DIN 695 and VDE 0471 to ensure the global recognition of test results.
The UL94 combustion tester is suitable for solid materials with a thickness of 0.1~13mm, and the test sample is usually a standard specification of 125mm×13mm×3mm. By precisely controlling parameters such as flame height and burning time, the equipment can accurately evaluate the flame retardancy level of the material and provide key data support for product safety certification (such as UL, CE, IEC, etc.).
 
 

 
fig 1 Horizontal combustion method
 
 

 
fig 2 Vertical combustion method
 
 

 
Standard
 
‌1.UL94 standard system‌
 
Core standards developed by the U.S. Safety Laboratory (UL), including grading methods such as HB (horizontal combustion), V0-V2 (vertical combustion), and 5VA/5VB (harsh environment test)‌
 
‌2.IEC International Electrotechnical Commission Standards‌
 
IEC 60695-11-10:1999/2003 Fire Hazard Test Methods‌
 
IEC 60950-1 Information Technology Equipment Safety Standards‌
 
3.ASTM American Society for Testing and Materials Standards‌
 
ASTM D635 Determination of Horizontal Combustion Characteristics of Plastics‌
 
ASTM D4804 Test of Combustion Performance of Foam Materials‌
 
ASTM D5048 Test of Plastic Combustion under High Stress Conditions‌
 
‌4.ISO International Organization for Standardization Standards‌
 
ISO 9772:2001 Vertical Combustion Test of Foam Materials‌
 
ISO 9773 Determination of Combustion Characteristics of Thin Materials‌
 
5.Other regional standards‌
 
DIN 695 German Industrial Standard (related to glow wire test)‌
 
VDE 0471 German Electrical Engineers Association Standards
 
Note: The special test standard for foam materials is the HF1-HF2 classification in UL94, and thin materials are applicable to the VTM0-VTM2 test method. The design of the test instrument must meet the requirements of UL94, IEC and ASTM for parameters such as combustion box structure and flame height control.
 
 
Application
 
1‌.Electronic and electrical products‌
 
Plastic parts such as electronic equipment housings and power plugs‌
Electrical products such as household appliances, machine tool appliances, and power tools‌
Information technology equipment (such as computer components) and electrical connectors‌
‌
2.Material types‌
 
Injection molding plastic materials (such as ABS, PC, etc.)‌
 
Film materials (VTM-0 to VTM-2 classification)‌
 
Foaming materials (HF-1/HF-2/HBF classification)‌
 
Insulating materials and engineering plastics‌
‌
3.Industry standard testing‌
 
Complies with UL94's assessment of 12 flame retardant grades such as HB/V0-V2/5VA-5VB‌
Also compatible with IEC 60695-11-10, ISO 1210 and other international standard tests ‌
 
4‌.Special application scenarios ‌
 
Fireproof protective housing for mobile/stationary equipment ‌
 
Wire and cable insulation materials (need to be tested in combination with UL1581 standard) ‌
 
Note: The test object is usually a solid material with a thickness of 0.1-13mm, and the sample size must meet standard specifications such as 125mm×13mm×3mm ‌
 
 
Main features of the instrument:
1 PLC + touch screen program control is adopted, and the test data can be automatically stored for more than 20 groups, automatically read, and automatically timed;
 
2 The volume of the test box is greater than 0.5 cubic meters, and the inner wall of the box is black;
 
3 Large transparent observation window, convenient for fully observing the combustion state of the sample;
 
4 Humanized large door and window design, convenient for installation and debugging of samples and burners;
 
5 The burner angle can be easily adjusted to 45 and 90 degrees to meet the needs of various standards;
 
6 High-precision regulating valve is used to adjust the gas pressure required by the standard;
 
7 Top exhaust device to extract the exhaust gas generated by combustion;
 
8 Equipped with ASTM D5207 standard temperature calibration device
 
 
Main performance parameters:
 
1 Combustion box:
 
1.1 Box: Volume ≥ 0.5m3, processed by CNC machine tools, with beautiful arc shape. High-quality steel plate electrostatically sprayed with high-temperature paint, with beautiful anti-rust and anti-corrosion characteristics;
 
1.2 A strong exhaust system is installed on the top of the box, and the exhaust gas is discharged to the outside when the test is completed; during the test, this system is stopped;
 
1.3 The front of the box is equipped with a tempered glass observation window that can be sealed during the test, which is convenient for observing the test situation.
 
2 Burning torch:
 
2.1 The burning power of the Bunsen burner is 50W, which meets the requirements of IEC 60695-11-4:2004 flame A, B or C and ISO10093:1998P/PF2;
 
2.2 The inner diameter of the flame nozzle: Ф9.5±0.1mm, the steam nozzle: Ф0.9±0.03mm, and the height of the nozzle from the air inlet is 100±10mm;
 
2.3 The angle of the torch: 45 degrees for horizontal method and 90 degrees for vertical method;
 
2.4 The flame height: 15mm~45mm can be adjusted at will;
 
2.5 Gas: methane gas, purity not less than 98%.
 
3 Temperature measurement system:
 
3.1 Copper block: diameter: Ф5.5±0.01mm, mass 1.76g±0.01g;
 
3.2 K-type thermocouple, armored thermocouple with wire diameter of 0.5mm, suitable for measuring temperature above 1050°C. Meet the requirements of GB/T16839-1997 standard;
 
3.3 Handheld thermometer matches K-type thermocouple. Its reading can be greater than 1000℃;
 
3.4 The whole test system is: movable, placed in the test box for temperature measurement;
 
3.5 Equipped with electronic stopwatch: accurate to 0.1S (standby during temperature measurement calibration).
 
4 Gas control:
 
4.1 Flowmeter: glass rotor flowmeter, flow range: 0~160mL/min adjustable;
 
4.2 Pressure gauge: suitable for pressure measurement in the range of 0~7.5kpa;
 
4.3 Regulating valve: adjust gas flow.
 
Sample fixture:
 
1 Test bracket: Made of stainless steel, divided into horizontal bracket and vertical bracket. There is a wire mesh under the horizontal bracket. The wire mesh is made of steel wire with a diameter of 0.40mm. The mesh is made of 20 holes per 25mm. The vertical bracket is parallel to the plane where the blowtorch is located and the plane of the observation window, which is convenient for observation and operation.
 
2 Maximum clamping thickness of the sample clamp: ≤13mm
 
3 Vertical adjustment distance of the sample clamp: ≤100mm;
 
4 Horizontal adjustment distance of the sample clamp: ≤70mm;
 
5 Equipped with a set of rulers that can measure the inner and outer flames during horizontal and vertical combustion.