What is UL 94 HBF?
Flammability UL 94 HBF – Horizontal Burning Foamed Material.
Is thermoplastic fire retardant?
Although no plastic can be rendered entirely fire proof, flame retardant thermoplastics can delay ignition and fire spread, which increases escape time, making them a critical part of product design.
What is a glow wire test?
Glow wire testing is an example of the indirect flame method. Test results from applying these methods provide a way to compare the materials’ tendency to resist ignition, self-extinguish flames (should ignition occur), and ability to not spread or propagate fire via dripping.
What does VW 1 mean on wire?
VW-1 is a vertical flame rating that measures the resistance of insulating materials to the propagation of a fire. The test involves mounting lengths of wire vertically in a ventilated chamber and attempting to ignite the wire with a gas flame.
What country is UL?
UL, LLC is a global safety certification company headquartered in Northbrook, Illinois….UL (safety organization)
| The UL logo | |
|---|---|
| Formerly | Underwriters Laboratories |
| Founder | William Henry Merrill |
| Headquarters | Northbrook, Illinois , U.S. |
| Area served | 125 countries |
What is the UL symbol?
From appliances, smart devices and furniture to home construction material and fire and carbon monoxide detectors, the UL Mark is a symbol of trusted safety and performance. The UL safety Mark means a product has been certified to meet scientific safety, quality or security standards.
What is UL F1 Rating?
To be F1 rated, Underwriters Laboratories (UL) specifies a 1,000 hr accelerated UV plus high temperature water exposure test to qualify polymer enclosures for outdoor industrial use. UL results for Engineered Polymer housing: Emerson has done testing on the complete molded enclosure.
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).
What are fire retardant resins?
Fire-retardant (FR) resins can be divided into several formulation categories: halogenated, inorganic FR, organophosphorus FR, and nitrogen-containing FR. These resin systems are represented within two major groups of FR – Halogenated FR and halogen-free FR.
How are flame retardants added to polymers?
Flame retardants (FR) are chemical compounds added with an objective to inhibit/retard the ignition/burning of the plastic….Types of Flame Retardants Used Today in Polymers.
| Additive Flame Retardants | Reactive Flame Retardants |
|---|---|
| Added to the polymer through physical mixing | Are added to the polymer via chemical reactions |
What is GWIT?
GWIT stands for glow wire ignition temperature (IEC 60695-2-13). This is a property associated with raw material used in the end product. This property is determined by conducting the glow wire test on a test plate of a raw material of a given thickness.
What is democracy?
Meaning “rule by the people,” democracy is a system of government that not only allows but requires the participation of the people in the political process to function properly.
What was the original form of democracy?
The original form of democracy was a direct democracy. The most common form of democracy today is a representative democracy, where the people elect government officials to govern on their behalf such as in a parliamentary or presidential democracy. [2]
What is UL-94?
UL-94 is the Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances. Within this standard, materials are subjected to various burning tests to see their performance in flammable conditions.
What are the basic features of a democracy?
While their opinions vary, a consensus of political scientists agree that most democracies are based on six foundational elements: Popular sovereignty: The principle that the government is created and maintained by the consent of the people through their elected representatives.