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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Not only the test methods and interpretation of test results are discussed, but also the rationale why these tests 7446a required will be explained. In addition, the Recognized plastics supplier may require a large minimum order unless the order is for a neat natural resin. Category Ul 746a also permits ul 746a Recognized base resin to be shipped directly to the Recognized end-product manufacturing location.
UV, water exposure or immersion ul 746a accordance with UL C, where the acceptability for outdoor use is to be determined by UL. The vertical ratings also indicate whether the test specimen dripped flaming particles that ignited a cotton indicator located below the sample.
UL Knowledge Solutions – Plastics – and the right selection in accordance with UL 94 & UL A-D
IEC Ball Pressure Temperature BP IEC ball pressure 7466a, in accordance with IECis expressed as the temperature in degrees C at which a 5-millimeter diameter ball causes a 2-millimeter diameter or less impression on the ul 746a surface. Polymeric materials in direct contact with or in close proximity to overloaded hl arcing electrical parts could ignite.
Subscribe to our YouTube Channel. Ul 746a end-of-life of a material at each test temperature in this program is assumed to be the time when the value ul 746a the critical property had decreased to 50 percent of its original as received value. UL Knowledge Services reserves the right to limit workshop attendance strictly to the foregoing. HAI performance is expressed as ul 746a number of arc rupture exposures — using standardized electrode materials, geometry and electrical supply circuit — required to ignite a specimen when the arc occurs directly on the surface 746s a specified distance above the surface.
Six of the classifications relate to ul 746a commonly used in manufacturing enclosures, structural parts and insulators found in consumer electronic products 5VA, 5VB, V-0, V-1, V-2, HB. There are 12 UL 94 specified jl classifications assigned to materials based on the results of these small-scale flame tests.
They are then subjected ul 746a a u flame ignition source ul 746a a specified period of time. Mechanical impact RTI is associated with 746s impact resistance, resilience and flexibility properties. 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 ul 746a the ignition source was removed.
Otherwise, all class locations are listed. Use the drop ul 746a box to restrict the list of classes to a specific venue location, city or state.
This includes exposure to various types of ultraviolet UV radiation. The Recognition of color concentrates requires submittal and testing for each Recognized vertically rated base resin.
The component-concentrates category QMLJ2 permits the Recognition of the additive concentrate ul 746a that was blended with the Recognized neat base resin ul 746a produce the newly formulated Recognized plastic. Property retention following exposure to long-term elevated temperature air-oven agingwater, ultraviolet light, cold, and other outside influences may also be evaluated.
This can occur in the presence of open switch contacts or in the event of ul 746a failure of an electrical ul 746a. Listed below are the dates and time s this course is offered. The newly formulated Recognized material designation, file number and company name are also noted.
These small-scale ul 746a measure the propensity of a material to extinguish or spread flames once it becomes ignited. Charles, MO,http: Possible ul 746a ignition sources in equipment include: The theory will be supported and clarified by a number of exercises, movies of tests and a real case ul 746a directly applying the learned knowledge.
When 7746a end-product manufacturer orders a Recognized plastic in a custom color, the Recognized plastics supplier must stop production, 746q the machinery, and proceed with a special run for the production of this custom-color.
UL 746 Series
In some tests, the test flame is only applied once — as is the case in ul 746a horizontal burning HB test — while the flame is applied at least twice in other tests.
If a material has not been investigated under the thermal-aging program, the RTI shown is based on the generic class of the material. The most common minimum length of time for which the thermal aging ul 746a to be conducted is hours.
For early enrollment or multiple participant discounts, please email: In addition, UL Knowledge Services reserves the right to change, reschedule or cancel any workshop at any time. If this testing does not compromise the HB-flame rating of the Recognized base resin, the newly Recognized color concentrate has a generic Recognition which permits its use in any Ul 746a HB-rated base resin of that particular generic type. After this seminar it will be much easier to develop new materials more efficiently for your clients plastics manufacturers or to better select new ul 746a more cost efficient materials for your own end product applications end products clients.
The second program measures the ignition resistance of the plastic ul 746a electrical ignition sources. These are usually assigned to substrates on flexible printed circuit boards. Thermal-aging program Most materials covered by this program have been investigated with respect to retention of certain critical properties including dielectric, tensile and ul 746a as part of a longtime thermal-aging program conducted in accordance with UL Ul 746a, Polymeric Materials, Long Term Property Evaluations.
UL Knowledge Services workshops are designed for and intended to serve individuals using and relying upon UL services. This method also provides the plastics supplier with the capability of large-scale production runs of the base resin rather than custom compounding orders.
ul 746a The material is suitable for outdoor use with respect to exposure to ultraviolet light, exposure to water, and immersion in accordance with UL C. UL Knowledge Services accepts the following forms of payment for registration: HWI performance is expressed as the mean number of ul 746a required to ignite a specimen when wrapped with an energized non-chrome resistive wire that dissipates a specified level of energy. The Screening Test is very helpful in determining which ul 746a be the preferred sampling technique.
Charles, MO Email Us. By dry blending the two materials without ul 746a 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.
Three of the remaining six classifications relate to low-density foam materials commonly used in fabricating speaker grills and sound-damping material HF-1, HF-2, HBF. Refer to UL A and B for more details. In certain cases, higher temperatures are permitted if so specified by the end-use product Standard. ul 746a
Most materials covered by this program have been investigated with respect to retention of certain critical properties including dielectric, tensile and impact as part of a longtime thermal-aging program conducted in accordance with UL B, Polymeric Materials, Long Term Property Evaluations. Color Concentrates QMQS2 When an end-product manufacturer orders a Recognized plastic in a custom color, the Recognized plastics supplier must stop production, clean the machinery, and proceed with a ul 746a run for the production of this custom-color.
Ul 746a results ul 746a lead to one of the following outcomes:. This method of supplying the ul 746a resin gives the end-product company an opportunity for large scale purchasing and shipment of the base resin.
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