Gester Instruments | Professional Textile, Footwear and PPE Testing Equipments Manufacturers Since 1997
Martindale wear tester operation and precautions
Machine Model: G235 Product Name: Martindale Abrasion Resistance and Pilling Tester Purpose: It can detect the abrasion resistance and pilling performance of various fabrics. Meet the standards: ASTMD 4970; ISO12945.2; GB/T4802.2 /13775/21196.1/21196.2; ASTMD4966; ISO 12947; FZ/T 20020; BS3424-24/5690; ISO 12947.1/12947.2; Mu0026S; P17/P19/P19C; NEXT 18/18a/18b; ISO5470-2; IWTO-40 ；JIS L10968.17.5 MethodE; Woolmark TM112/196; BS EN 388/530/13770; ISO20344 Test principle: 1) Rubbing resistance test The round fabric sample is fixed on the grinding table, and the friction head fixed with standard friction cloth Perform a friction test. There are three evaluation methods: determination of sample damage, determination of quality loss, and evaluation of appearance changes. 2) Pilling test. The pilling test method adopted on Martindale was developed in conjunction with EMPA. The test is suitable for knitted and woven fabrics (woven from spun yarn). Use the test instrument to simulate the pilling that occurs during normal wear. Under slight pressure, rub the sample mounted on the sample holder and the fabric on the grinding table in a certain geometric pattern, and then rub the sample after grinding. Contrast level with standard sample photos. According to the types of tested samples, it can be simply divided into: knitting fuzzing and pilling review sample photos, and woven fabric fuzzing and pilling review sample photos. And according to the jealous condition of pilling, it is divided into five levels. 5-No pilling? 4-Slight pilling? 3-Medium pilling 2-Severe pilling 1-Very severe pilling Test method: The test sample is under the specified pressure After rubbing with a standard rubbing cloth, after reaching a predetermined number of rotations, to evaluate the wear resistance of the sample. Product features: 1) Number of stations: 9 can significantly improve the test efficiency; 2) Movable sample fastening components: a friction sample can be taken out at any time without affecting other samples, improving test flexibility; 3) Friction Counting range: 0~999999 times, which can be adapted to different wear-resistant materials and standard test requirements; 4) Stroke: horizontal 60.5±0.5mm, longitudinal 24±0.5mm, which can meet the needs of different sizes of materials to be tested; 5) Two An effective friction diameter: can be selected according to actual needs. 6) The relative movement speed of the gripper and the grinding table is adjustable: 20-70r/min. Operation method 1. The preparation of the sample is in a standard environment, in a flat, unstretched state Place for a period of time according to different standards. Such as 24 h (GB/T 4 80 2.2-19 97), 16h (EN ISO 12947-4:1998) 2. Selection of sample Representative. If it is a fancy fabric, the sample should include all the different structures and colors presented on the cloth surface; 3. Remove the load and load shaft from the testing machine; 4. Remove the top plate and test fixture; 5. The device of the sample : Loosen the fixing ring on the test fixture, take off the sample pressing sheet, and put the sample into the test fixture base. When the fabric to be tested is not more than 500 g/m2, a piece of polyester foam is placed between the sample and the metal plug of the sample holder; when it is more than 500 g/m2 or a composite fabric, no foam is required. The specimens on each specimen holder shall be subjected to the same tension. 6. The device of wool felt and friction cloth: put the felt and abrasive on the grinding table, put the weight on the abrasive, then put on the pressure ring, tighten the nut, so that the pressure ring will fix the abrasive on the grinding table. 7. Put the grinding head on the abrasive and pressurize; 8. Put the test fixture with the sample face down and place it on the base fixture, adjust the circular groove of the test fixture to align with the load shaft, so that the load shaft is inserted In the circular groove of the test fixture; 9. Set the number of times according to the standard, start the switch, start the test, and automatically stop after the set number of times: 10. Remove the sample and compare the standard sample in the grading box to Martindale Precautions for the operation of the abrasion tester: 1. The friction cloth cannot be used repeatedly, and a piece of friction cloth needs to be replaced every time the test is completed; 2. The wool felt can be used repeatedly, if the surface is worn or stained, it can be replaced. Use; 3. The insole should be clothed first, and then the Martindale wear test; 4. After the test is completed, the surface of the sample has abrasion, yarn breakage, fuzzing or serious pilling, serious abrasion and other abnormal phenomena, it is judged as Unqualified. 5. When preparing samples, pay special attention to cutting edges to avoid hairy changes to avoid unnecessary quality loss and appearance changes. 6. Pay attention to operating specifications and personnel safety during the operation of the instrument. Maintenance of Martindale wear-resistant testing machine 1. The external cleaning and cleaning of the instrument must be carried out regularly to ensure the cleanliness of the testing instrument. 2. The testing instrument should be inspected regularly to see if there is any abnormality; 3. Each user is in In the process of use, it should be used in accordance with the correct method of use, and should not be used in violation of regulations, so as not to damage the instrument and shorten the life of the instrument; 4. After using the test instrument, all users must place the instrument and respond accordingly To ensure the cleanliness of the instrument; 5. When the instrument is not in use, turn off the power of the instrument and keep the instrument clean. More about Martindale Wear Tester: http://www.standard-groups.com/TextileGarment/
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Results are influenced by raw materials, yarn properties,
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