What is a UL 94 HB rating?
UL 94 is a plastics flammability standard released by the Underwriters Laboratories (USA)….UL 94 Classification and Flame-Retardant Thermoplastics.
| UL 94 Rating | Definition of Rating |
|---|---|
| HB | Slow burning on a horizontal part |
What is a UL 94 rating?
DEFINITION OF UL 94 RATING. HB. A horizontal burning test, where burning stops before 100mm. V-2. Burning stops within 30 seconds on a vertical part, permitting drops of vertical flammable plastic.
How do you do a flammability test?
Test Procedure: The various flammability tests are all similar in that they (1) orient a test sample either horizontally or vertically and place it in the test chamber; (2) apply a flame from a Bunsen Burner for a specified time; and (3) measure the time or distance that the flame propagates.
When should a flammability test be done?
Different materials require different flammability tests. Because a single product can be made of many distinct materials, the whole item is usually subjected to flammability testing only when conducting a failure analysis — determining why a product did not perform to expectations when exposed to fire.
What MVS 302?
302 (FMVSS 302), Flammability of Interior Materials, is used to determine the burn resistance capabilities of materials used in the occupant compartments of motor vehicles. This test is typically performed on materials in passenger cars, trucks, and buses.
What is UL requirements?
The UL Listed seal means that the product has been tested by UL to nationally recognized safety and sustainability standards. Additionally, it has been found to be free from a reasonably foreseeable risk of fire, electric shock in a Division 2 environment.
What is UL in measurement?
A measure of volume for a liquid, using the metric system. One μL is equal to a millionth of a liter. Also called microliter.
What is the yellow card for materials?
A Yellow Card is issued when polymeric materials have successfully undergone our testing procedures and received a UL Recognized Component Mark. Our tests include: Ignition and burning characteristics from thermal and electrical sources. Electrical, physical and mechanical characteristics.
What is a yellow card production?
Yellow-Card Productions shall be defined as those major stage events which employ stage technicians under traveling agreements with the International Alliance of Theatrical Stage Employees and Moving Picture Technicians, Artists, and Allied Crafts of the United States, its Territories, and Canada (IATSE).
Why is flammability testing important?
Flammability testing is a critical part of ensuring safe and trustworthy consumer products. Industry applications for flammability test methods include textiles and consumer goods, aerospace and transportation, bedding, and furniture materials.