IEC 60695-2-11 defines the glow-wire flammability test method applied to end-products for fire-hazard assessment. For the purpose of this test method, an end-product includes: The purpose of the glow-wire test is to evaluate whether a part exposed to an abnormal thermal stress: The test is particularly relevant to polymeric and insulating parts used in electrical…
6.5 Tension 6.5.1 Three samples of MPT shall withstand a tension of 156 N (35 Ibf) for one minute applied in accordance with 6.5.5 – 6.5.6 Each sample shall be approximately 457 mm (18 inches) in length Following the test, there shall be no splits, cracks, tears, separation of convolutions, or other openings when it…
First thing we need to do is to analyze pure polymer. In this example, polymers A and B are heated up in DSC, and the heat for melting is recorded. It is a specific enthalpy meaning measurement is presented as per mg of material. We use this information to quantify the mixture contents. Here is…
4 Apparatus4.1 Testing machine capable of applying load in vertical and/or horizontal direction and with a measuringaccuracy of ± 3 %.4.2 The accuracy of positioning of components shall be within ± 2 mm.4.3 Devices to have the pallets secured for test 6.3 and 6.5.4.4 Instrument for measuring deformation with an accuracy of 0,2 mm.4.5 Determination…
6 Apparatus6.1 Depth Gauge—The depth gauge shall consist of three components that conform the requirements of this section; a dial indicator, a setting block and a contact point with extension. 6.1.1 Dial Indicator—capable of measuring to depth of at least 2.5 mm [0.10 in.] with an accuracy of 60.025 mm [0.001 in.].6.1.2 Setting Block—the setting…
The Cleveland Open Cup (COC) Tester is used to determine the flash point and fire point of petroleum products under controlled laboratory conditions according to ASTM D92. The method is particularly intended for petroleum products with flash points above 79°C (175°F) and below 400°C (752°F), subject to the applicability limitations specified by the standard. What…
How can we evaluate whether polyethylene has been adequately crosslinked? One of the most widely used approaches is to determine its Gel Content and, when required, its Swell Ratio. ASTM D2765 describes test methods for determining the insoluble fraction produced by crosslinking in ethylene plastics. The methods are applicable to crosslinked polyethylene materials of different…
11.1 ObjectThis test method is intended to establish the ability of a fibre optic cable to withstand mechanical twisting. The primary purpose of this procedure is to measure any variation in the optical power transmittance of a fibre when the cable is subjected to torsional forces external to the cable jacket. A secondary purpose is…
faces. A jig as shown in Fig. 1 and capable of notching the specimens in accordance with 10.2 shall be used.NOTE 4—It is recommended that the jig be permanently mounted to ensure notching consistency.6.3 Specimen Holders—Lengths of hard or half-hard brass channel having the dimensions shown in (B) of Fig. 2 shall be used. The…
7 Apparatus7.1 Testing Machine— The apparatus shall be constructed essentially as shown in Fig. 2 and Fig. 3 and shall consist of the following: suitable base to withstand the impact shock; steel rod impact weight weighing 8 ± 0.2 lb (3.6 ± 0.1 kg);hardened steel impactors as specified in 7.1.1; a slotted guide tube 40…
