[[TitleIndustry]]

TPU film flame retardant level introduction

Date:Jun 29, 2019

TPU film has a very important parameter, that is, the flame retardant level of TPU film, let's take a look at the flame retardant level of TPU film!


Flammability UL94 rating is the most widely used flammability performance standard for plastic materials.

It is used to evaluate the ability of a material to extinguish after it has been ignited.

There are various evaluation methods depending on the burning speed, the burning time, the drip resistance, and whether the beads are burned.

Each material to be tested can obtain many values depending on the color or thickness.

When a material of a product is selected, its UL rating should meet the thickness requirements of the wall portion of the plastic part.

The UL rating should be reported along with the thickness value. It is not enough to report only the UL rating without thickness.

The flame retardant grade of plastic is gradually increased from HB, V-2, V-1, V-0, 5VB to 5VA:


HB: The lowest flame retardant rating in the UL94 standard. For samples from 3 to 13 mm thick, the burning speed is less than 40 mm per minute; for samples less than 3 mm thick, the burning speed is less than 70 mm per minute; or it is extinguished before the 100 mm mark.

V-2: After two 10 second burn tests on the sample, afterflame & afterburning is extinguished within 60 seconds. The dripping particles can ignite the cotton.

V-1: After two 10 second burn tests on the sample, afterflame and afterburning were extinguished within 60 seconds. The dripping particles do not ignite cotton.

V-0: After the sample was subjected to two 10 second burn tests, the afterflame & afterburning was extinguished within 30 seconds. The dripping particles do not ignite cotton.

5VB: After five 5 second burn tests on the sample, afterflame & afterburning is extinguished within 60 seconds. The dripping particles do not ignite cotton. For block samples it is allowed to be burned through.

5VA: After five 5 second burn tests on the sample, afterflame & afterburning is extinguished within 30 seconds. The dripping particles do not ignite cotton. Blocked samples are not allowed to be burned through.

The above is about the flame retardant level of TPU film. Have you learned it?

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