ISO 1210 | UL 94 Horizontal Vertical Flame Test Machine for Plastics

D337 ISO 1210 | UL 94 Horizontal Vertical Flame Test Machine for Plastics

Fundamental assessment of Plastics for Fire Performance

UL 94 (Underwriters Laboratories test standard UL 94) is one of the most used flammability tests for determining comparative flammability for plastic materials. It measures the ability of sample to extinguish the flame after ignition and its dripping behavior in response to a mini flame or radiant heat source under controlled environmental conditions.

The tests results are intended to serve as a primary assessment of the material’s suitability with respect to flammability for a particular application, such as plastic materials used for parts in electronic devices and appliances.

The flammability is influenced by several factors such as:

Ignition time – time for a sample to take flames
Flame propagation – how far flame propagates
Fire resistance – how long the material can resist the flame from penetration
Rate of heat release – heat energy released per second

Ease of extinction – how rapidly the flame chemistry leads to extinction
Smoke release &
Toxic gas generation

Hence, plastic burning behavioral study is a major area of research to industry:

The behavior of the burning process in plastics
Various methods to reduce plastics flammability, and
Methods to test flammability
Main Types of Testing & Flammability Ratings to Classify Plastics

The UL standard classifies plastics according to the minimum thickness at which it stops burning when tested in a horizontal or vertical orientation.

Types of testing/flammability ratings covered in the UL 94 standard for flammability of plastic materials include:

• Vertical burning tests (V-0, V-1, V-2, 5V, 5VA, 5VB, VTM-0, VTM-1, VTM-2)
• Horizontal burning tests (HB, HBF, HF-1, HF-2)

The UL test methods are aligned with IEC 60707, IEC 60695-11- 10, IEC 60695-11-20, ISO 9772 and ISO 9773 standards used to determine fire properties.

UL 94 VTM Rating: VTM-0, VTM-1 and VTM-2 – Thin Material Vertical Burning Testing

This test method is used for thin specimen or materials that are too flexible or may distort, shrink or flex during the traditional vertical testing (failure to pass the UL 94 V test is a precondition of all VTM ratings). This test is similar to the vertical burning test except that the material is wrapped around a mandrel before clamping to the stand and the flame application is reduced. In this test, the flame is applied only for 3 seconds.

UL 94 5V Rating: 5V, 5VA, 5VB – Vertical Testing is done on both bar and plaque samples

For any Plastic material to achieve 5V classification, the test samples must not burn with flaming and/or glowing combustion for more than 60 sec after the fifth flame. Also, the test samples must not drip.

Horizontal Burning Test for Classifying Plastic material

Samples molded from the Plastic material are oriented in either a horizontal depending on the specifications of the relevant test method, and they are subjected to a defined flame ignition source for a specified period of time.

UL 94 HB Rating

A Plastic material having a thickness between 3 and 13mm will be classified as a HB Plastic material if it does not have a burning rate exceeding 40mm per minute. For Plastic material with thickness less than 3mm the burning rate should not exceed 75mm per minute. The Plastic material will also be rated as HB if it ceases to burn before the 100mm mark independent of thickness.

UL 94 HBF: HBF, HF-1 and HF-2 – Horizontal Burning Foamed Plastic material

This test grants three different types of ratings depending on burning rates and or afterflame times. A Plastic material will be classified as a HBF Plastic material if it does not have a burning rate exceeding 40mm per minute over a 100 mm span or if ceases to burn before flaming or glowing reach the 125mm mark.

 

D337 | UL 94 Horizontal Vertical Flame Test Machine for Plastics

Specifications:-

Warranty:-1 year

Customized support:-OEM, ODM

Volume of test chamber:-≥ 0.5 m3

Nozzle inner diameter:-0.375 inches (9.5mm)

Standard:-ISO 1210, UL 94

Model Number:-D337

Power:-Electronic, 500 W

Certification:-CSA, pock, Reach, IECEE, sock, UL, EPA, GS

Spray fire mode:-Automatic electronic fire

Timer:-0 ~ 99.99 s arbitrary setting

Test Material:-Plastics

Dimension:-L1200 * W600 * H1260 mm

Material:-Baking finish

Technical Parameters
Nozzle diameter	0.375 inches (about 9.5mm); tube length 100mm
Metal mesh	Square for the side length 125mm, the web plate is made of 0.45 steel wires with diameter of 0.7mm.
Volume of the test chamber	Greater than or equal to 0.5 m3
Outer box size	L1200 x W600 x H1260 mm, high quality material baking paint
Spray fire mode	Automatic electronic fire
Timer	0 ~ 99.99 s arbitrary setting
Working power	AC220V, 50HZ, and the total power is 500W.

 

D337  | ISO 1210 | UL 94 Horizontal Vertical Flame Test Machine for Plastics

Frequently Asked Questions:-

What is UL 94 Horizontal Vertical Flame Test Machine For Plastic?

The FTT UL 94 on plastic materials to measure Chamber tests are conducted flammability characteristics suitability for a particular application. The apparatus is, giving a preliminary indication of their supplied as a complete necessary for ease of use and system incorporating all the features safety.

What does UL 94 v0 mean?

V-0: burning stops specimen; drips of particles allowed as within 10 seconds on a vertical long as they are not inflamed. 5VB: on a vertical specimen; no drips allowed; plaque burning stops within 60 seconds specimens may develop a hole.

What is UL flammability rating?

UL 94 is a plastics the Underwriters Laboratories (USA). The standard flammability standard released by classifies plastics orientations and part thicknesses from the according to how they burn in various lowest flame-retardant to most flame-retardant in six different classifications.

 

D337 Horizontal Vertical Flame Test Machine for Plastics