WelcomeWebsite! If you have any questions, please call !
Flammability tester,burning tester,Fire Retardant Fabrics Tester_QINSUN

Hotline:

Product

News

Company:-Qinsun Instruments Co., Ltd.
Phone:+86-17740808215
Tell:+86-21-6780 0179
Email:info@qinsun-lab.com
Address:No.2578 Minhang District Gu Dai Road, Shanghai

UL 94 flammability tests explained

Position: Home > Technical

UL 94 flammability tests explained

Author: Date :2018-12-06 Views: order
UL 94  is defined as the "Standard for Safety of Flammability of Plastic Materials for Parts in Devices and Appliances testing". This plastics flammability standard is issued by Underwriters Laboratories of the USA.
 
The standard classifies plastics according to how they burn in various orientations and thicknesses. From the lowest (least flame-retardant) to the highest (most flame-retardant). The classifications are summarised below.
 
UL 94 HB:
Slow burning on a horizontal specimen; burning rate < 76 mm/min for thickness < 3 mm and burning stops before 100 mm. 
Unless listed below, most OKW products carry this rating. Please see individual product pages for details. 
 
UL 94 V-2:
The test samples are extinguished within 25 seconds average time (mean of 10 successive tests). None of the test samples burn longer than 30 seconds. The test samples emit some burning particles.
 
UL 94 V-1:
The test samples are extinguished within 25 seconds average time (mean of 10 successive tests). None of the test samples burn longer than 30 seconds. None of the test samples emit burning particles.
 
UL 94 V-0:
The test samples are extinguished within 5 seconds average time (mean of 10 successive tests). None of the test samples burn longer than 10 seconds. None of the test samples emit burning particles.
 
UL94 5VB:
Burning of the test sample stops within 60 seconds on a vertical specimen; no drips allowed; plaque specimens may develop a hole.
 
UL94 5VA:
Burning of the test sample stops within 60 seconds on a vertical specimen; no drips allowed; plaque specimens may not develop a hole.

UL 94 flammability tests explained(图1)

Phone:+86-17740808215 Tell:+86-21-6780 0179 Address:No.2578 Minhang District Gu Dai Road, Shanghai Email:info@qinsun-lab.com sitemap