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Manufacturer / Exporter / Supplier / Retailer Of Digital Tearing Strength Tester, Schopper Type Tensile Tester, Rapid Sheet Dryer, Pulp Disintegrator, Patra Type Fluff Tester, Lab Valley Beater, Lab Hydrapulper, horizontal tensile tester, Gurley Type Smoothness & Porosity Tester, Flotation cell, En... Read More
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Mr. Shafiq Rehman
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Tensile Strength, the maximum force developed a test specimen before rupture on the tensile test carried to rupture under prescribed conditions. Tensile Strength (as used here) is the force per unit width of test specimen. Stretch, the maximum tensile strain developed in the test specimen before ruptrure in a tensile test carried to rupture under prescribed conditions. The stretch (or percentage elongation) is expressed in a percentage i.e. one hundred times the ratio of the increase in length of the test specimen to the original test span. Details : Tensile energy absorption (TEA), the work done when the specimen is stressed to rupture in tension under prescribed conditions as measured by the integral of the tensile strength over the range of tensile strain from zero to maximum strain. The TEA is expressed as energy per unit area (test sapn X width) of test specimen. Breaking Length, the calculating limiting length of strip of uniform width, beyond which, if sucha strip were suspended by one end, it would break of its own weight. Tensile Index, the tensile strength in N/m divided by grammage.
The model is having three search unit (sensor unit) determines the reflectance of the surface of the objects, as well as the colour, by measuring the light reflected from their surface and then comparing to standards. The instrument consists of a Sensor Unit and a Photometer. The Sensor Unit provides the light source and the measurement transducers (Photocells). The outputs of the Sensor Unit are fed to photometer where they are processed and converted into a digital reading, which is displayed on the front panel. Applications : A useful comprehensive list of application is given in other literature along with appropriate S.U., filters, and applicable standard methods. Below, some of these applications are put into prospective, with only the most widespread and important ones mentioned. Paper Industry - Our instrument is widely used to measure the “paper brightness” using S.U. “W”, which has a blue filter built in. gloss measurement using S.U. “P” and opacity measurement using S.U. “Y” with green tristimulus filter are also possible. For opacity the instrument is first set to read 100, with the sample placed on white plaque. Then a reading is taken with the sample on black surface this reading is % opacity.
The moisture content of the paper is defined as the loss of weight of sample, dried under specified conditions to constant weight at a temperature of 1050C ï ± 20C and is expressed as a percentage of the weight of the moist sample. Scope : This method applies to papers and do not contain appreciable quantities of material, other than water, that will escaper from the paper at the temperature specified for the test. After drying enclose the sample quickly in the container and allow to cool for 45 min (Note 3). Equalize the air pressure outside and inside the container by momentarily opening and closing it. Weigh the container and its contents. Empty the container and reweigh it immediately, together with its lid.
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