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16 Sep, 2025 17 Views Author: Cherry Shen

Application of Flammability Testing Labs in Flame Retardancy Testing of Equipment and Materials Across Multiple Fields

Abstract​
In the electrical and electronic industry as well as the field of material research and development, the flame retardant safety performance of products is directly related to their safety and reliability during use. As professional flame retardant performance testing equipment, flammability testing labs can accurately simulate the needle – shaped flame scenarios caused by local overheating or short circuits inside equipment. They conduct scientific testing on the flame retardant performance of various types of equipment, such as lighting equipment, low – voltage electrical appliances, household appliances, and a variety of materials, including insulating materials, engineering plastics, and solid flammable materials. This paper takes the LISUN ZY – 3 Flammability Testing Lab  as the core research object, conducts in – depth analysis from aspects such as the equipment’s working principle, technical parameters, application scope, and practical testing cases, and intuitively presents its testing capabilities with the help of table data. It provides a strong reference for product safety certification and quality control in related industries.

1. Introduction​
With the popularization of electrical and electronic equipment and the diversification of material applications, fire accidents caused by local overheating of equipment and insufficient flame retardant performance of materials occur from time to time. For example, the overheating of lamp holders due to long – term operation of lighting equipment, the ignition of surrounding materials by arc at the contacts of low – voltage electrical appliances, and the generation of sparks due to internal circuit short circuits in household appliances may all lead to potential safety hazards. At the same time, insulating materials, engineering plastics, and other components, as important parts of equipment, their flame retardant performance also directly affects the overall safety level of the equipment.​

Traditional flame retardant testing methods are difficult to accurately simulate the needle – shaped flame risks in actual use. However, flammability testing labs, with their standardized needle – flame generation systems, can reproduce the local flame scenarios inside equipment and conduct tests under different environmental conditions, effectively filling the gap of traditional testing methods. As an excellent flammability testing lab in the industry, the LISUN ZY – 3 Flammability Testing Lab, with its precise flame control and flexible parameter settings, has become an important equipment for flame retardant testing in industries such as lighting, home appliances, and electronics.​

Application of Flammability Testing Labs in Flame Retardancy Testing of Equipment and Materials Across Multiple Fields

ZY-3 Needle Flame Test

2. Working Principle and Technical Characteristics of Flammability Testing Labs​
2.1 Working Principle​
The LISUN ZY – 3 Flammability Testing Lab, as a typical flammability testing lab, realizes flame retardant performance testing through the process of “needle – flame generation – flame action – effect observation”, and its core working process is as follows:​
• Needle – flame Generation Stage: High – purity butane gas is used as fuel, and a specially made needle – shaped burner (with precisely controlled inner diameter) is used to generate a needle – shaped flame. The burner can be adjusted in angle and position according to testing requirements to ensure that the flame can accurately act on the key parts of the sample.​
• Flame Parameter Control: The equipment uses a temperature sensor to monitor the flame temperature in real – time, ensuring that the flame stably reaches the standard temperature of 950℃±10℃ within 30 seconds. At the same time, the flame height is precisely controlled to 12mm±1mm with a scale, meeting the requirements for needle flames in standards such as GB/T 5169.5 and IEC 60695 – 11 – 5.​
• Sample Testing and Observation: The sample is fixed on an adjustable sample stage, and the needle – flame is applied to the designated position of the sample for a set period of time (usually 30 seconds). During the test, real – time observations are made on whether the sample catches fire, the flame spread, the extinction time, and whether flammable drips are produced, so as to determine the flame retardant performance of the sample.​

2.2 Core Technical Parameters of the LISUN ZY – 3 Flammability Testing Lab​

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The technical parameters of the LISUN ZY – 3 Flammability Testing Lab directly determine its testing accuracy and application scope. The specific parameters are shown in the table below, and all indicators meet the requirements of relevant domestic and international standards:

Technical Parameters

Index Range

Accuracy Requirement

Function Description

Needle – flame Burner

Inner diameter: 0.5mm±0.1mm, Length: 35mm

Made of stainless steel, resistant to high temperature and corrosion, ensuring stable flame shape

Flame Temperature

950℃±10℃

±5℃

Rapidly heats up to the set temperature within 30 seconds, with small temperature fluctuation

Flame Height

12mm±1mm

±0.5mm

Equipped with a high – definition scale for intuitive adjustment and observation of flame height

Flame Action Time

0~999.9s

±0.1s

Programmable setting to meet the testing duration requirements of different samples

Sample Stage Adjustment

Three – dimensional adjustment (up – down, left – right, front – back), Angle: 0~90°

Can accurately adjust the sample position to ensure the flame acts on the key testing points

Fire Extinguishing Device

Automatic air – jet fire extinguishing system

Automatically starts fire extinguishing when the flame is abnormal or the test is completed to ensure testing safety

Data Recording

Equipped with a high – definition camera and temperature recorder

Records the testing process and temperature changes in real – time for subsequent analysis

Standard Compliance

GB/T 5169.5, IEC 60695 – 11 – 5, UL 94, etc.

Meets the testing requirements of multiple national safety certifications and has a wide application range

3. Application Scope of Flammability Testing Labs​
As a comprehensive flammability testing lab, the LISUN ZY – 3 Flammability Testing Lab can be applied to a wide range of equipment and materials, which can be specifically divided into two categories: equipment testing and material testing.​
3.1 Equipment Flame Retardancy Testing​
This instrument can conduct flame retardant testing on equipment in multiple fields such as lighting equipment and low – voltage electrical appliances. The testing focus and typical products of different types of equipment are shown in the table below:

Equipment Category
Typical Product Examples
Core Testing Parts
Testing Purpose
Lighting Equipment
LED ceiling lights, outdoor floodlights, stage spotlights
Lamp holder terminals, power cord insulation layers, lamp housings
To verify the flame retardant ability of key parts of the equipment after being exposed to flames during long – term operation or abnormal conditions
Low – voltage Electrical Appliances
Miniature circuit breakers, AC contactors, wall sockets
Insulating components around contacts, housings, insulation sleeves of terminal posts
To evaluate the flame retardant performance of surrounding components when flames are caused by arc at the contacts or overheating of electrical appliances, so as to prevent fire spread
Household Appliances
Drum washing machines, wall – mounted air conditioners, microwave ovens
Internal circuit insulation layers, control panel housings, motor insulation housings
To detect the flame retardant performance of relevant components when flames are generated due to internal short circuits or component overheating in household appliances, so as to ensure use safety
Electric Tools
Handheld electric drills, electric grinders, jigsaws
Power cords, components around motor carbon brushes, switch housings
To test the safety of key components of electric tools after being exposed to flames when used outdoors or in harsh environments
Electronic Instruments
Digital oscilloscopes, signal generators, spectrum analyzers
Circuit board insulation coatings, instrument housings, interface parts
To ensure the flame retardant performance of electronic instruments when flames are caused by local overheating in complex circuit environments
Electronic Meters
High – precision multimeters, pressure transmitters, temperature sensors
Meter housings, insulation layers of internal terminals
To verify the flame retardant ability of key components of meters during long – term operation or environmental fluctuations, so as to ensure measurement accuracy and safety

3.2 Material Flame Retardancy Detection​
In addition to equipment testing, this instrument can also determine the flame retardant grade of various materials such as insulating materials and engineering plastics. The testing indicators and application scenarios of different materials are shown in the table below:

Material Category

Typical Material Examples

Core Testing Indicators

Correlation with Material Application Scenarios

Insulating Materials

Epoxy resin boards, polyimide films, silicone rubber insulation sleeves

Flame extinction time, combustion duration, maintenance of insulation performance

Used in the internal insulation structure of electronic equipment, it is necessary to ensure that the insulation performance is maintained after being exposed to flames to prevent electric leakage

Engineering Plastics

ABS resin, polycarbonate (PC), nylon 66 (PA66)

Flame spread length, charring area, flammability of drips

Widely used in equipment housings and structural components, they need to have good flame retardancy to prevent flame spread and drips from igniting other components

Solid Flammable Materials

Paper packaging materials, rubber sealing rings, fiber fabrics

Ignition time, combustion rate, residual combustion time

Some are used for internal filling or sealing of equipment, and it is necessary to evaluate their combustion characteristics after being exposed to flames to avoid becoming fire hazards

4. Practical Testing Cases and Data Analysis​
4.1 Case 1: Needle – flame Testing of LED Lamp Housings​
A lighting enterprise used the LISUN ZY – 3 Flammability Testing Lab to conduct flame retardant testing on the PC material housing of its newly developed outdoor LED lamp. The testing parameters and results are as follows:​
Testing Parameters: Flame temperature: 950℃, Flame height: 12mm, Action time: 30 seconds, Action position: The weak area of the housing near the lamp holder;​
Testing Results:​
• During the flame action: The housing did not catch fire, and only slight charring occurred at the contact area;​
• After the flame was removed: There was no residual flame, no spread of the charred area, and no flammable drips were produced;​
• Performance Judgment: It meets the requirements for the flame retardant performance of lamp housings in GB 7000.1 – 2015 “Luminaires – Part 1: General Requirements and Tests” and can be used for mass production.​

4.2 Case 2: Needle – flame Testing of Engineering Plastic ABS​
A material enterprise used the LISUN ZY – 3 Flammability Testing Lab to conduct flame retardant testing on an ABS engineering plastic sample (used for household appliance housings). The testing data are shown in the table below:

Testing Parameters

Set Conditions

Description of Testing Phenomena

Testing Result Judgment

Flame Temperature

950℃±10℃

The flame was stable, and the temperature fluctuation was ≤5℃

The temperature meets the standard requirements

Flame Action Time

30s

The contact area of the sample was slightly softened, and no open fire was generated

No combustion phenomenon, with good performance

After Flame Removal

No residual flame in the softened area, and no spread of charring

The flame retardant performance meets the standard

Drip Condition

No drips were produced

No ignition risk, qualified

Basis for Testing Standards

GB/T 5169.5 – 2019

Meets the judgment requirements of the standard

Conclusion: The flame retardant performance of this ABS engineering plastic sample meets the requirements for household appliance housings and can be recommended to household appliance enterprises for product production.​

4.3 Case 3: Needle – flame Testing of Insulating Material Epoxy Resin Board​
An electronic enterprise used the LISUN ZY – 3 Flammability Testing Lab to test the flame retardant performance of an epoxy resin board (used for circuit board insulation). The testing results are as follows:​
Testing Process: Flame temperature: 950℃, Action time: 30 seconds, Action position: The surface of the epoxy resin board;​
Key Results: During the flame action, the epoxy resin board did not catch fire, and only slight discoloration occurred on the surface; After the flame was removed, there was no residual combustion. The insulation resistance test showed that its insulation performance did not decrease significantly (the insulation resistance was 500MΩ before the test and 480MΩ after the test), which meets the dual requirements of flame retardancy and insulation for insulating materials of electronic equipment.​

5. Conclusions and Prospects​
As professional testing equipment for accurately simulating needle – shaped flame risks, flammability testing labs play an irreplaceable role in the flame retardant performance testing of equipment in multiple fields such as lighting equipment, low – voltage electrical appliances, household appliances, and materials such as insulating materials and engineering plastics. The LISUN ZY – 3 Flammability Testing Lab, with its stable technical performance and wide application range, provides a reliable guarantee for product safety testing in related industries, helping enterprises improve the safety level of products and meet domestic and international safety certification standards.

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