Refer to the flow diagram located in the appendix a. Materials testing material testing offered by ul include the most popular standard tests for all major plastics, rubbers, and film applications. Ul 94, the standard for safety of flammability of plastic materials for parts in devices and appliances testing there are two types of preselection test programs conducted on plastic materials to measure flammability characteristics. This method is used to determine the ul 94 v0, v1 and v2 flammability ratings. Understanding ul 94 certifications and limitations lets shed some light on what the ul 94 standard and its associated flammability ratings are and, more importantly, what they are not. It conforms to all five ul 94 horizontal and vertical bunsen burner tests and to the associated us and international. Ul 94 vertical horizontal flammability testing equipment. Astm d3801 20 standard test method for measuring the. Test for flammability of plastic materials for parts in devices and appliances. It screening procedure for comparing the relative burning behaviour specimens made from plastic and other nonmetallic materials. Ecliptek, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors.
Specimens that do not exhibit a burn through hole are classified 945v a specimens that burn through hole are. Test procedures specified have been determined to be applicable to small components with an overall volume of less than 2500 mm. D5025 specification for laboratory burner used for smallscale burning tests on plastic materials. This test is mainly used for quality control, production control and material comparisons. Plastic is a high molecular weight material composed of repeating organic molecules monomers. Ul standard 94 identifies test methods for flammability of plastic materials for parts in devices and appliances. Specifications ul t est procedures horizontal burning t est for 94hb classification 94hb horizontal flame class requirements thickness burning rate 18in 112 inmin test procedures and requirements ul94hb specimen. It is also applicable in the horizontal, vertical flammability test of the relative combustion characteristic of foam plastics whose density is noless than 250kgm according to iso845 test method. Ul 1581 reference standard for electrical wires, cables, and flexible cords. This is solely based on their response to a small open flame under controlled laboratory conditions. Failure to pass the ul 94 v test is a precondition of all vtm ratings. The 94hb test describes the horizontal burn method. Emi ul94 test for flammability of plastic materials for parts in devices and appliances technical note download free download as pdf file. Perform flammability classification in accordance with paragraph 8 of ul 94 fifth edition, test for flammability of plastic materials for parts in devices and appliances 50w 20 mm vertical burning test.
The flammability test is used to determine the relative rate of burning of selfsupporting plastics. Flammability ul 94 v ul thermoplastics testing center. Ul 94 vertical burning classification test of superchute. This article is the first in a series intended to answer some common questions regarding this standard, and is based upon the ul standard 94 text. These revisions to ansiul 94 are being issued to address the following changes in. Test procedures in ul 1694 are applicable to small components with an overall volume of less than 2500 mm3 0. Ul94 test for flammability of plastic materials for parts. Test procedures for evaluating flammability of interior. Comparisons between experimental and simulated results of ignition times showed that edge effects were significant in the ignition process of the ul94 test and the convective heat transfer ignition model considering edge effects. Ul 94, the standard for safety of flammability of plastic materials for parts in devices and appliances testing. The test evaluates both the burning and afterglow times.
It is mainly used in plastic and other nonmetallic material sample, solid material. Ul 94 is defined as the standard for safety of flammability of plastic materials for parts in devices and appliances testing. Ul 94, the standard for safety of flammability of plastic. Understanding ul 94 certifications and limitations.
Ul 94 flammability testing is the first step toward obtaining a plastic recognition and subsequent listing in the plastics recognized component directory former known as yellow cards. An investigation of the ul94v plastics flammability test. The standard determines the materials tendency to either extinguish or spread the flame once the specimen has been ignited. This standard contains revisions through and including may 22, 2001. Ul 94 test for flammability of plastic materials for parts in devices and appliances by caroline gold overview plastics have become one of the most useful types of material known to mankind. Although the test methods and desired fire performance vary between tests, they. This method is used to determine the ul 94 vtm0, vtm1 and vtm2 flammability ratings of thin materials. To find information about ul certified products and components quickly and easily, use ul product iq, an expansion of the former online certification directory.
Test procedures for evaluating flammability of interior materials. This version of the report has been produced from a. The ul 94 flammability test is intended to provide an indication of the acceptability of polymeric materials used in devices and appliances based on their flammability characteristics. This document explains the underwriters laboratory standard for testing the flammability properties of plastic materials used for parts in devices and appliances. D5048 test method for measuring the comparative burning characteristics and resistance to burnthrough of solid plastics using a 125mm flame. Ul 94 standard for tests for flammability of plastic materials for. D4804 test method for determining the flammability characteristics of nonrigid solid plastics. Filmed at western washington university, 11242014, featuring bradley fenbert and john. Model building, life safety and fire codes include numerous requirements that products and materials include specified minimum flammability ratings. Ul 94 flammability tests of plastic materials for parts in devices and applications.
Specimens that do not exhibit a burn through hole are classified 94 5v a specimens that burn through hole are. Ul 94 flame chamber the ftt ul 94 tests for flammability of plastic materials giving a preliminary indication of their suitability for a particular application. Ul 94 flammability testing is the first step toward obtaining a plastics recognition and subsequent listing in the plastics recognized component directory former known as yellow cards. May 08, 2014 what does the ul94 flammability rating mean. The test evaluates both the burning and afterglow times and dripping of the burning test specimen. Test for flammability of plastic materials for parts in. Test for flammability of plastic materials for parts.
The first determines the materials tendency either to extinguish or to spread the flame once the. The test evaluates both the burning and afterglow times and dripping of. The horizontal burning test is used to determine the hb flammability rating of a material. Document was downloaded by yun feng wei for use by suzhou. Ul 94 vertical and horizontal flammability tester youtube. Ul94 test for flammability of plastic materials for parts in devices and appliances by caroline gold overview plastics have become one of the most useful types of material known to mankind. It is a flammability specification issued by the underwriters laboratories inc. Jul 01, 2018 ul 94 flame retardant tester is used for the flammability testing of plastic materials such as v0 v1 v2, hb, 5v, hf1 hf2, hbf material or foam, and used in consumer electric devices and. Posted on may 8, 2014 by phil ul is the abbreviation for the underwriters laboratories, this is an independent organisation in the united states to control and certificate product safety. A total of 10 specimens 2 sets are tested per thickness. Ul 94 flammability of plastic materials ecosafene have rich experience to provide ul 94 flammability of plastic materials ul 94. The range of analytical, chemical resistance, electrical, flammability, mechanical, optical, physical, rheological, and thermal tests.
The apparatus is supplied as a complete system incorporating all the features necessary for ease of use and safety. Ul 1694 standard for tests for flammability of small. Ul 94, the standard for safety of flammability of plastic materials for parts in devices and appliances testing, is a plastics flammability standard released by underwriters laboratories of the united states. Ul 94 underwriters laboratories test standard ul 94 is one of the most widely used flammability tests for determining relative flammability for plastic materials. Ul 94 flame classifications ul94 flame ratings for plastics. Ul94 standard operating procedures university of texas. An experimental procedure was proposed to measure ignition times of two polymers under the ul94 test condition. Materials testing for manufacturers and retailers ul. This plastics flammability standard is issued by underwriters laboratories of the usa. It measures the ability of plastic part to extinguish the flame after ignition and its dripping behavior in response to a small open flame or radiant heat source under controlled.
However, components within the envelope that have less than ul 94 v1 are subject to a needle flame test. A burner flame is applied to the free end of the specimen for two intervals separated by the time it takes for flaming combustion to cease after the first application. Ul 94 flammability rating summary 5va surface burn burning stops within 60 seconds after. Standard for tests for flammability of plastic materials for parts in. Ul international thermoplastics testing center website test methods. Materials testing and sample preparation services for. This test uses specimen which is held at one end in the vertical or horizontal position. Astm d 4804, test method for determining the flammability. Ul94 vertical flame test instructional video youtube.
Quartz crystal clock oscillators xo spxo lvpecl pecl 2. It screening procedure for comparing the relative burning behaviour specimens made from. Five specimens of each thickness are tested after conditioning for 48 hours at 23 degrees c and 50% rh. Ul 94 the test for flammability of plastic material used in parts for electronic devices and appliances is commonly known as ul 94. An experimental procedure was proposed to measure ignition. Ul94 flame retardant tester is used for the flammability testing of plastic materials such as v0 v1 v2, hb, 5v, hf1 hf2, hbf material or foam, and used in consumer electric devices and. Burning rate ul 94 hb horizontal burning rate ul 94 hbf horizontal burning rate ul 94 5v vertical burning rate ul 94 v vertical burning rate ul 94 vtm vertical flame propagation of elastomers astm c 1166 flammability, enclosure ul 746c, sect. The tests in the standard for tests for flammability of small polymeric component materials should be used to evaluate small components which contain materials that can not be fabricated into standardized specimens in the minimum use thickness and subjected to applicable preselection tests in ul 94. Analysis and modeling of ignitability of polymers in the ul. Test for flammability of plastic materials for parts in devices and appliances ul94 flammability of plastic mat. Ul94 standard for tests for flammability of plastic. Ul 94, the standard for tests for flammability of plastic materials for parts in.
Ul product iq features an intuitive and userfriendly design that gives users free access to all certification information. Emi ul94 test for flammability of plastic materials for. This is a short instructional video about how to set up and execute a ul 94 standard vertical flame test. Cone calorimeter test has an advantage over bunsen. Jul 03, 2018 ul 94 vertical horizontal flammability testing equipment. Determine test procedures and performance criteria that demonstrate improved repeatability over. Ul94 test for flammability of plastic materials for. Test procedures for evaluating flammability of interior materials barbara c. Refer to the flow diagram located in the appendix a for an illustration of the testing required for. Tests for flammability of plastic materials for parts in devices and. Test procedures in ul 1694 are applicable to small components with an. Ul 94 standard for tests for flammability of plastic.
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