This method is used to determine the UL 94 VTM-0, VTM-1 and VTM-2 flammability ratings of thin materials. Failure to pass the UL 94 V test is a precondition of all VTM ratings. The test evaluates both the burning and afterglow times and dripping of the burning test specimen.

UL 94 is a safety standard to determine the flammability of plastic materials. This test is released by Underwriters Laboratories of the United States. It measures: The ability of the plastic part to extinguish or spread the flame after ignition.

Sep 25, 2024 · UL94 V and UL94 VTM ratings differ in test setup and sample type. Both assess flammability, with V-0 being ideal, as it avoids dripping and extinguishes flames quickly.

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. [1]

UL 94 VTM Test (Thin Material Vertical Burning Test) Sheet 또는 필름 형태 시편 20 개, 200 x 50 x 신청 두께(mm) (여러 색상 인증 등의 경우에는. 1. 시편을 13mm 직경의 봉(mandrel)에 말아서 윗 부분을 테이핑하고, 클램프를 이용하여. 2. 버너 및 시험 방법은 V 시험과 유사하나, 시편에 3 초간 2 회의 접염을 실시 한 후 제품의. 4. UL 94 HB Test (Horizontal Burning Test) Bar 시편 6개, 125 x 13 x 신청 두께(mm) (여러 색상 인증 등의 경우에는 엔지니어와 상담)

Jul 15, 2019 · Two UL 94 ratings that code officials commonly run across are HB and V (V-0, V-1, or V-2). These ratings are established using small-scale tests in which approximately 5 by ½ inch samples are subject to a ¾ inch, 50W tirrel burner flame ignition source.

Products now need to be V-0 or V-1, before a 5VA or 5VB rating is granted. See appendix for details on HB, VTM, and 5V tests. Two sets of five specimens at 23 + 2°C/50 + 5% RH/48 hrs. Two sets of five specimens at 70 + 1°C for seven days and cooled in desiccator for 4 hours. Lab atmosphere of 15-35°F/45-75% RH. Calibrate flame.

Mar 23, 2021 · UL 94 (Underwriters Laboratories test standard UL 94) is one of the most widely used flammability tests for determining relative flammability for plastic materials. It measures the ability of a plastic part to extinguish the flame after ignition and its dripping behaviour in response to a small open flame or radiant heat source under controlled ...

UL 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. These small-scale tests measure the propensity of a material to extinguish or spread flames once it becomes ignited.

The UL 94 Standard provides a method for rating the ignition characteristics of plastic materials. Two UL 94 ratings that code officials commonly run across are HB and V (V-0,