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目前显示的是 九月, 2019的博文

Testing With Universal Leather Friction Color Fastness Tester

      Leather Friction Color Fastness Tester   is designed to carry out a rub fastness test on the surface of leather or coated fabrics to determine the marring of the surface finish and to assess the amount of color transfer from the sample to the rubbing pad  under dry friction and wet friction. Testing Principle of  Leather Friction Color Fastness Tester  : The rubbing pad under certain load of pressure makes reciprocating friction against the leather surface to assess the amount of color transfer red  from the leather surface  to the rubbing pad . Visually assess the color rating with gray scale. Testing steps for  Leather Friction Color Fastness Tester  : When testing, place the instrument on the felt. 1.  Dry Friction   1.1 The used side of the sample faces upward, stretched in the sample holder without wrinkles. Tighten the sample clip and place it between  the long hole and felt in the...

International Standards and Wide Usge of Fogging Tester

The term “Fogging” refers to the film that collects on the inside of vehicle window glass. Of particular interest is the windshield, because this film can both limit light transmittal as well as refract the light that is transmitted, impairing visibility and creating safety concerns.  Fogging tester is designed to test the fogging phenomena of leather and fabric under specified environment conditions, suitable for the fogging property evaluation of  volatile components of the  interior trimming materials used in cars and aircrafts under high temperature, and the instrument can also be used to test the fogging property of  car xenon lamps.  Qinsun fogging tester is designed to determine the fogging value as defined in the various standards as well as compare types of materials used in vehicle cabins: DIN 75201 — Determination of the windscreen fogging characteristics of trim materials in motor vehicles ISO 6452 — Rubber- or plastic coated fabrics – determi...

Perspiration Tester For Colour Fastness Test

      Perspiration Tester is widely used in determining the color fastness of textiles to perspiration, sea water, saliva and distilled water. The colored textile specimen combined together with the prescribed  lining fabric is wet out in a simulated acid perspiration solution or others. After the wetting processed, the specimen combination is extruded to remove the excess fluid and sandwiched between the sample board, applied with specified pressure for a certain period of time. Then dry the specimen and the lining fabric seperately and observe the color change. The Perspiration Tester is designed for color fastness test to perspiration, sea water, saliva, distilled water and in colored textiles. It is applicable to dyed, printed or otherwise colored textile fibers, yarns and fabrics of all kinds and to the testing of dyestuffs as applied to textiles. AATCC  textile perspiration fastness tester  is to determine colour fastness test to wate...

Test Steps With Hydrostatic Head Tester

    Hydrostatic head tester is used to measure the water penetration resistance of fabrics and seams, providing a quick and accurate test result.     The specimen is secured by means of a hand operated clamp. Once the process is engaged the pressure is controlled in a slow and even motion to avoid extreme exertion on the material. The digital gauge can be read in either kPa (kiloPascal) or psi (pounds per square inch) or Bar. The test specimen is then visually observed for any evidence of water penetration. Test Specimens   A minimum of three fabric specimens should be taken diagonally across the width of the fabric to be representative of the material.   Cut specimens at least 200x200 mm to allow properclamping.   Handle the specimens as little as possible and avoid folding or contaminating the area to be tested.   Condition the test specimens at 21 – 2°C (70 – 5°F) air at 65 – 2% RH for at least 4 h before testing.   The surface of the fabric to be ex-p...

Learning About Multi-Finger Scratch / Mar Tester

      Taber Multi-Finger Scratch / Mar Tester is used to evaluate the scratch and mar resistance of resilient materials. A variable speed, pneumatically driven sledge is moved below five independent, weighted scratch "fingers" that are equipped with interchangeable scratch tips.      The design of   Multi-Finger Scratch / Mar Tester is based on the apparatus described in automotive specifications (including Ford BN 108-13; General Motors GMN3943; Daimler-Chrysler LP-463DD-18-01 & PF-10938; and Nissan NEW M0159 Supplement U01-1), which is commonly referred to as a five-finger (five-arm) scratch & mar tester.     The  Multifunctional Scratch Resistant Instrument  includes a pneumatically driven, moveable sledge to which the test sample is mounted. The sledge moves in a linear fashion, and is operated by a control knob for one or multiple pass testing. An electronic timer displays the rate of speed, which can be...

Digital Elmendorf Tearing Tester For Various Materials

       A tear is generally uneven and, and usually unplanned. An exception is a tear along a perforated line, such as those found on a roll of toilet paper or paper towels, which has been previously partially cut, so the effort of tearing will most likely produce a straight line. The speed at which a tear resistance test is conducted can affect the test significantly. Tear transmission resistance is common for acceptance testing with materials such as paper and rubber. Tear resistance in textiles involves the load required to spread a single "rip-tongue" type of tear or the type of tear where the material is initially cut. Materials vary in their vulnerability to tearing. Some materials may be quite resistant to tearing when they are in their full form, but when a small cut or tear is made, the material becomes compromised, and the effort needed to continue tearing along that line becomes less. Tearing Resistance Tester tests the tear force required to tear...

Tear Resistance Tester For Tear Testing

Most tear resistance tests are performed statically and commonly take one of three forms. These forms differ from one another in the configuration and preparation of the test sample, the grip placement, and the rate of testing. The first form is referred to as the trouser shape tear test and involves a rectangular sample that has a cut down the middle of one half of the sample so that two legs are formed and the sample resembles a pair of trousers. Each leg is then placed into one of the test grips and is then pulled apart so that the tear continues down the middle of the sample. The second form is the tongue tear test and requires that the sample have a tab cut in the middle. This tab is cut so that so that it is separated the rest of the sample on the bottom and sides but not the top. The tab is then placed in the top grip while the rest of the sample is placed in the bottom grip. As the top grip is moved upward the tab is pulled so that the cuts on both sides are extended upw...

Hand Abrasion Tester For Finished Products

Have you ever know what the hand abrasion tester is for ?   The hand abrasion tester is designed to perform real life testing of finished products or lab samples in respect of resistance to hand abrasion. The hand abrasion tester is set-up to exactly reproduce the complex chemomechanical system of human hand abrasion according to international standards. The flexible design of the tester allows various mechanical and chemical options. When humans touch a surface they expect a feedback. Our fingers are not sensitive in regards of pressure, however they are very sensitive for shear and friction. Therefore, when we need feedback from a surface we always perform a sliding motion by touching a surface.The tester exactly reproduces the act of a human touch on the surface.                     The human hand consists of a visco elastic material containing a rough and structured surface. The visco-elasticity of the finger is rep...