Summary: The weave structure is loose and it is easy to form pilling on the surface of the fabric during wear. Therefore, it is very important to objectively and accurately evaluate the pilling performance of knitted fabrics. This document uses the Standard Group (Hong Kong) Co., Ltd. G235 Martindale Abrasion Tester to test the pilling performance of a company\'s polyester-cotton knitted fabrics, briefly describes the experimental process and introduces information such as equipment parameters and scope of application. It can be a reference for scientific research units, testing institutes and textile companies to test the performance of evaluate products.
Keywords: Polyester Cotton Knit Fabric, Pilling Performance, Martindale Abrasion Tester
1, meaning
knitted fabric There are many variants.During the actual wearing and washing process of these knitted fabrics, due to continuous friction, the fibers on the surface of the fabric become visible on the surface of the fabric, and the surface of the fabric appears fluffy.This phenomenon is called \"pilling\". . If these hairs can\'t fall off in time during continuous wearing, they will become entangled and kneaded into many small spherical particles, which is commonly called \"pilling\". surface of the fabric, are very easy to adhere dirt and dust, which improves the wearability andseriously affects the appearance of the fabric.
Polyester/cotton and polyester/viscose blend fabrics are durable, beautiful and comfortable to wear. Friction, polyester-cotton blended knitted fabrics are more serious than natural fibers in pilling, and the feel and appearance of the fabric will deteriorate, causing pilling Affected performance. It is very important to objectively and accurately assess the pilling performance of polyester and cotton knitted fabrics.
This document introduces the test method for testing the pilling performance of a polyester-cotton knitted fabric by the Martindale abrasion method, which can be used for research It provides a reference for the test of the pilling performance of the material.
2, standards and methods
There are four major fabric pilling test methods: random-turning pilling test method, Martindale abrasion test method, rolling box pilling method and circular track pilling method. This article mainly introduces the wear resistance test of fabrics by the Martindale method, which is based on the standard GB/T4802.2.For more other pilling test methods, please contact Standard Group (Hong Kong) Co., Ltd.
3Test Sample
Polyester-cotton knitted fabric from a particular company
4, test equipment
G235 Martindale Abrasion Tester (Standard Group (Hong Kong) Co., Ltd. independent research and development)
Instrument parameters:
l 1. Number of stations: 9 stations;
l 2. Count range: 0～999999 times
l 3. Maximum stroke : horizontal 60.5 ± 0.5 mm, vertical 24 ± 0.5 mm
l 4. The amount of pressurized material:
a. Gripper: 200±1g
b. Fabric sample weight: 395±2g
c Furniture decoration sample weight: 594±2g
d. Stainless steel disc: 260 ±1g
l 5. Effective friction diameter of grinding block:
Type A 200g (1.96N) friction head (9kPa)￠28.8－0.084mm
Type B 155g (1.52N) friction head (12kPa)￠90－0.10mm
l 6. Relative movement speed between gripper and grinding table: 20-70r/min (adjustable)
l 7. Mass of loading hammer: 2385±10g
4.1ExperimentPrinciple
Using the Martindale method to test fabric pilling performance, under the specified pressure, the circle on the sample holder The sample and the abrasive on the grinding table (the same cloth or wool abrasive as the sample under test) is rubbed according to the Lisaru curve. The sample is free to rotate around the central axis perpendicular to the sample plane. After the specified friction stage, the fuzzing - and pilling level of the sample is judged by visual description.
4.2Scope
Default group ( Hong Kong) The G235 Martindale Abrasion Tester supplied by Co., Ltd. cantesting the abrasion resistance and pilling performance of various fabrics. Passes ASTMD4970, ISO12945.2, GB/T4802.2/13775/21196.1/21196.2, ASTMD4966, ISO12947, FZ/T20020, BS3424-24/5690, ISO12947.1/12947.2, M&SP17/P19/18a, NEXTP19C, /10b-2, ISO4TO4TO4TO-2 , JISL10968.17.5MethodE, WoolmarkTM112/196, BSEN388/530/13770, ISO20344 and other testing requirements.
5, test process
5.1 Sample Preparation
Place it in a standard environment for 24 hours in a flat, unstretched state according to different standards.
5.2 Selection of Swatches
Cut from full fabric width a sample from different parts of the body, and the sample must be representative. If it\'s a nice fabric, the sample should include all the different textures and colors thatthe cloth surface;
5.3 Remove the load and load shaft from the test machine;
5.4 Remove the top plate and test fixture;
5.5 Example device:
Unscrew the fixing ring on the test fixture, remove the sample gland and well. The specimen is placed in the base of the test setup. When the tested substance does not exceed 500 g/m2, a piece of polyester foam is placed between the sample and the metal plug of the sample clamp; when it exceeds 500 g/m2, or a composite fabric, no foam is required. The samples on each sample holder must be subjected to the same voltage.
5.6 Installation of wool felt and abrasive cloth:
Put the felt and abrasive on the sanding table, put the weight on it Place the washer on the abrasive and tighten the nut so that the washer fixes the abrasive on the grinding table.
5.7 Place the grinding head on the abrasive to pressurize;
5.8 Place the test stand with the sample facing down and place it on the base stand, adjust the circular groove of the test stand to align with the load axis so that Insert the load shaft into the circular groove of the test fixture;
5.9 Set the number of times according to the standard, start the switch, start the test, and stop automatically after reaching the set number of times:
5.10 Pull down the preview and compare it to the default photo in the review box
6, test results
Evaluation of pilling level: under standard light source, compare with standard samplethere are pictures, that is, let several judges In the judgment box, compare and analyze the sample with the standard sample, and use the result as the pilling degree of the sample. The example photo method uses five numbers, 1-5 respectively. The smaller the number, the more severe the pilling and the better the anti-pilling performance.
7 Conclusion
This article uses the Standard Group (Hong Kong) Co., Ltd. G235 Martindale Abrasion Tester to Test a Pilling Properties of Polyester and Cotton Knitted Fabrics. The test shows that the equipment has the advantages of wide application range, simple operation, high test accuracy and good repeatability of experimental results.
Standard Group (Hong Kong ) Co., Ltd. is a comprehensive supplier specializing in providing materials testing instruments and general laboratory solutions. It is committed to providing of professional one-stop technical laboratory services for manufacturers and traders.In addition to air permeability testers for fabrics, Standard Group The provides the equipment provided includes color fastness tester, pilling tester, water repellency and waterproof tester, thermal resistance and moisture resistance tester, combustion tester and so on.By the most advanced products in the world introduce, integrate technology and service advantages, absorb common experience in solving problems, provide domestic customers with optimal solutions, promote the improvement of domestic scientific research and related industries.You can log on www.standard-groups.cn to view relevant equipment information, or call 021-64208466 directly for consultation.
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