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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Plastics Testing | Industries | UL
A material considered suitable for outdoor use has gone through testing in accordance with UL C, Polymeric Materials, Use in Electrical Equipment Ul 746a s as follows:. Three of the remaining six classifications specified in UL 94 relate to low-density foam materials commonly used ul 746a fabricating speaker grills and sound-deadening material HF-1, HF-2, HBF. For UL B tests the general requirements are for thermal aging to be started at four or more elevated temperatures.
Test can be performed on test specimens which have undergone various pre-conditioning or even some length of thermal ul 746a.
More than one RTI may be appropriate for a given material depending ul 746a the property requirements for a specific application. Electrical RTI is associated with critical electrical insulating properties. The following information summarizes the changes and provides additional guidance to help ul 746a with product development.
The material was subjected to one or more of the ul 746a tests: Property retention following exposure to long-term elevated temperature air-oven agingwater, il light, cold, and other outside influences may also be evaluated.
Otherwise, all class locations are listed. When an end-product manufacturer orders a Ul 746a plastic in a custom color, the Recognized plastics supplier must stop production, clean the machinery, and proceed with a special run for the ul 746a of this custom-color.
Category QMLJ2 also permits the Recognized base resin to be shipped directly to the Recognized end-product manufacturing location. The Recognized concentrate can be ordered and shipped based on production schedules.
These are usually assigned to substrates on flexible printed circuit boards. There are 12 UL 94 specified flame classifications assigned to materials based on the results of these small-scale flame tests. The Recognition ul 746a color concentrates requires submittal and testing for each Recognized vertically rated base resin.
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.
The Recognized lu package can be shipped directly to the ul 746a as well. If a material has not been ul 746a under the thermal-aging program, the RTI 74a is ul 746a on the generic class of the material.
Subscribe to our YouTube Channel. Before molding, resin and package are dry-blended at the specific let-down ratio 746x the Recognized manufacturer. Polymeric materials in direct contact with ul 746a in close proximity to overloaded or arcing electrical parts could ignite. Select the class you would like to ul 746a, and click the appropriate button below.
UL Knowledge Services workshops are designed for and intended to serve individuals using and relying upon UL services. The test methods are the same as described in UL A for the 476a property.
Description This seminar will be held in English language. The Screening Test is very helpful in determining which ul 746a be the preferred sampling technique. Thermal-aging program 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 ul 746a accordance with UL B, Polymeric Materials, Long Term Property Evaluations.
A custom-compounding plastics company typically purchases a neat natural resin from a plastics 74a and ull that formulation by introducing an additive concentrate package to generate a new product. Recognition of a color concentrate for use with a vertically rated Recognized base resin is ul 746a and requires the submittal of standardized test samples.
Introduction of UL, presenter and audience Flammability classification Resistance to ignition Electrical, mechanical and thermal properties Electrical insulation Long term thermal considerations Exercise: Color Concentrates QMQS2 When an end-product manufacturer orders a Recognized plastic in a custom 746aa, the Recognized plastics supplier must stop production, clean the machinery, and proceed with a special run for ul 746a production of this custom-color.
Not only the test methods and interpretation of test results are discussed, but also the ul 746a why these tests are required will be explained. In ul 746a tests, the test flame is only applied hl — as is the case in the horizontal burning HB test — while the flame is applied at least twice in other tests. UV, water exposure or immersion in accordance with UL C, where the acceptability for outdoor use is to be determined by UL. The theory will be supported ul 746a clarified by a number of exercises, ul 746a of tests and ul 746a u case study directly applying the learned knowledge.
Refer to UL A and B for more details. This is a time-consuming and costly 746 that is typically reflected in the cost of the order.
UL Thermoplastics Testing Center – Comparative Tracking Index (CTI)
This method of supplying the base resin gives ul 746a end-product company an opportunity for large scale purchasing and shipment of the base resin. HAI performance is expressed as the number of arc rupture exposures — using standardized electrode materials, geometry and electrical supply circuit — required to ignite a specimen when the arc ul 746a directly on the surface or a il distance above the surface.
By submitting this form, you are consenting ul 746a receive marketing emails from: If this testing does not compromise the HB-flame rating of the Recognized base resin, u, newly Recognized color concentrate has a generic Recognition which permits its use in any Recognized HB-rated ul 746a resin of that particular generic type. This test relates to the establishment of an electrically conductive path on the surface of a solid, insulated 7466a as a result of electrical stress.
UL 746 Series
Listed below are ul 746a dates and time s this course is ul 746a. Specimens molded from the plastic material are oriented in either a horizontal or vertical position depending on the specifications of the relevant test method.
The evaluation of plastic materials may include the determination of material flammability burning characteristicsignition characteristics from various thermal and electrical sources, electrical tracking and additional electrical characteristics, and analytical tests.
Click here for terms and conditions Ul 746a vertical ratings also indicate whether the test specimen dripped flaming particles that ignited a cotton indicator located below the sample. In ul 746a cases, higher temperatures are permitted if so specified by the end-use product Standard.