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博文

目前显示的是 四月, 2019的博文

How The Martindale Test Goes On

The Martindale test involves rubbing a piece of worsted wool cloth in a circular motion on a flat mounted fabric sample. Each pass is one cycle, and the number of cycles the test fabric can withstand before showing a change in appearance (such as thread breakage or pilling) is its abrasion rating. At the beginning of the test checks are made every 1,000 cycles, and if no wear is apparent, the fabric is put through another 1,000 rub cycle. As the test goes on, sometimes these intervals will increase. How does the Martindale test work? The fabric being tested is pulled taut and loaded onto the lower plates of the Martindale machine.  Small discs of worsted wool or wire mesh (the abradant) are continually rubbed against the test specimens in a Lissajous figure – a wandering, oscillating circle.  The fabric is continually inspected for wear and tear, and the test ends when two yarns break or when there is a noticeable change in appearance. How can you read a Martindale test result? T

Classfication Of The Textile Testing

Textile testing is the term for a whole series of tests that examine the physical, mechanical and chemical properties of textiles. These tests are sometimes done before a textile goes into widespread use, or they're done on textiles arriving from other countries for sale in US markets. Countries like the United States have established standards for what should and should not be in textile products. Tests can show whether companies making textiles are in compliance or not. Many textile tests have many types. Some of them are physical tests, in which a sample of textile material is examined closely for feel and appearance. Such tests are done on individual fibers or strands of material and on yarns, threads made of several fibers twisted together. Textiles are subjected to light and other elements to see how they react. Some of these tests are done in a weather-ometer, a machine that tests for weathering and lightfastness of textiles. It's basically an enclosed box. Textiles

Tips For Hydrostatic Head Testing

    The  Hydrostatic Head Test apparatus  consists essentially of an inverted conical well equipped with a coax-ial ring clamp to fasten the cloth specimen un-der the well bottom.Hydrostatic Head Tester is used to test the resistance of permeability of synthetic blood for materials used in protective clothing. Dynamic, static, custom mode for different test requirements. One side of the specimen is subjected to a hydrostatic pressure that increasing at a constant rate, then will be ended until three points of leakage appear on its other side.    The  Hydrostatic Head test instrument  contains a high precision pressure control system, which could produce the test pressure in an internal water tank. Real-time pressure curve displays on the screen. Easy to use of build-in test mode for different standards.                              The apparatus introduces water from above the specimen over an area 114 mm in diameter and at a rate of 10.0 – 0.5 mm of hydrostatic head per secon

The Test Principle of Cone Calorimeter

 Traditionally it has been very difficult to measure and more recently full scale testing of items (e.g. furniture) has been possible by burning these articles and measuring the evolved heat using a technique called oxygen depletion calorimetry. Now the Cone Calorimeter is the most significant bench scale instrument in the field of fire testing.Heat release is the key measurement required to assess the fire development of materials and products. cone calorimeter is a fire test apparatus based on the amount of heat released during the combustion process, which is directly related to the oxygen consumption in the combustion process. The amount of heat generated is directly proportional to the severity of the fire, such as the rate of fire growth. In order to obtain the flammability of the material, the material is exposed to an external radiation heat source. Therefore, since this is a forced combustion test, the cone value is generally considered to reflect the second ignitability

The Scratch Tester Working Principle From Qinsun LAB

The scratch test machine is used to evaluate the shear, scratch, planing, scraping and engraving performance of the material. Its applications include rigid organic materials, plastics and glass, and so on. The test parameters, such as the speed of scratches, the length of scratches, the distance between scratches and the number of lines, are the test equipment with strong applicability and convenience. scratch tester Working principle: Coating has three aspects: the action of protection, decoration, and hide the defects of products, and the three main hardness has a lot to do with paint, paint film hardness is said film one of the important properties of mechanical strength, is an important indicator of measuring coating product quality, and measure the coating hardness is an important index of the scratch resistance of determination; Coating good product in the process of packaging, transport and use will draw by hard brush, not row brush the paint film is often leave scratc