UL A: UL Standard for Safety Polymeric Materials – Short Term Property Evaluations. Standards for. CTI/trackingUL A ASTM D IEC or equivalent standards. Animation: CTI / tracking. UL Performance Materials Electronics Brochure. UL Series – A / B / C / D / E. Section 1: General. Dry Arc Test Closeup One of the most referenced Standards for evaluation of Polymeric.
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This includes exposure to various types of ultraviolet UV radiation. Select the class you ul 746a like to attend, and click the appropriate button below. The second program measures the ignition resistance of the plastic to electrical ignition sources.
Charles, MO Email 7466a. Three of the remaining six classifications relate to low-density foam materials commonly ul 746a in fabricating speaker grills and sound-damping material HF-1, HF-2, HBF.
In some tests, the test flame is only applied once — as is the case in the horizontal burning HB test — while the flame is uk ul 746a least ul 746a in other tests. The component-concentrates category QMLJ2 permits the Recognition of the additive concentrate package that was blended with the Recognized neat base resin to produce the newly yl Recognized plastic. This usually means the test specimens are to be tested are to undergo some length ul 746a thermal aging prior to testing.
Similarly, Recognition for use with HB-rated Recognized base resins involves the submittal of standardized test samples of the color concentrate let-down into a Recognized HB-rated base resin for testing.
UL Knowledge Solutions – Plastics – and the right selection in accordance with UL 94 & UL A-D
An HB flame rating indicates that the material was tested in a horizontal position and found to burn at a rate less than a specified maximum. Ul 746a This seminar will be held in English language. Electrical RTI is associated with critical electrical insulating properties.
The preferred test sampling method is the Fixed Time Frame Method. To ensure reproducibility of the Recognized concentrate package, identification testing consisting of infrared spectroscopy IRthermogravinetry TGAand differential scanning calorimetry DSC testing is conducted on the Recognized concentrate package let-down into its generic carrier.
This method also provides the plastics supplier with the capability of large-scale ul 746a runs of the base resin rather than custom compounding ul 746a. This does not mean that all long term thermal aging projects can be completed within the minimum hour requirement; the length of time needed for completion is to be agreed upon by all parties involved. Also, these specimens ul 746a not drip any flaming particles.
The newly ul 746a Recognized material designation, file number and company name are also noted.
Polymeric materials in ul 746a contact with or in close proximity to overloaded or arcing electrical parts could ignite. Test results may lead to one of the following outcomes: A tabulation of the temperature indices according to the generic material class is ul 746a in UL B and is based on the past field-test 746w and chemical structure.
Relative temperature index RTI is the maximum service temperature for a material where a class of critical property will not be unacceptably compromised through chemical thermal degradation.
When an end-product manufacturer orders a Recognized plastic in a custom color, the Recognized plastics supplier must stop production, 7446a the machinery, and proceed with a special run for the ul 746a of this custom-color.
In addition, the Recognized plastics supplier may require a large minimum order unless the order is for a neat natural resin. For early enrollment or multiple participant discounts, please email: HAI performance is expressed as the number of arc rupture exposures ul 746a using standardized electrode materials, geometry and electrical supply circuit — required to ignite a specimen when the arc occurs directly on the surface or a specified distance above the surface.
By dry blending the two materials without exceeding the published maximum let-down ratio, end-product manufacturers can produce the contracted part, which is typically more cost-effective than ordering a custom Recognized plastic.
They kl ul 746a subjected to a defined flame ignition source for ul 746a specified period of time.
Uk 94 also describes a method in which the test flame is applied for up to five applications in testing for a 5VA or 5VB classification.
You can unsubscribe anytime. This can occur in the presence of open switch contacts or in the event of the failure of an electrical connection. Specimens ul 746a from the plastic material are oriented in either jl horizontal or vertical position depending on the specifications of the relevant test method. Ul 746a retention following exposure to long-term ul 746a temperature air-oven agingwater, ultraviolet light, cold, and other outside influences may also be evaluated. In addition, Ul 746a Knowledge Services reserves the right to change, reschedule or cancel any workshop at any time.
These are usually assigned to ul 746a on flexible printed circuit boards. The three vertical ratings — V2, V1 and V0 — indicate that the material was tested in a vertical position and self-extinguished within a specified time after the ignition 76a was removed.
IEC ball pressure temperature, in accordance with IECis expressed as the temperature in ul 746a C at which a 5-millimeter diameter ball causes a 2-millimeter ull or less impression on the material surface.