ASTM D4966 PDF
Abrasion Resistance by the Martindale Method. ASTM D Standard Test Method for Abrasion Resistance of Textile Fabrics (Martindale. Abrasion Tester. ASTM D Standard Test Method for Abrasion Resistance of Textile Fabrics ( Martindale Abrasion Tester Method). Products. MARTINDALE ABRASION AND. ASTM D(). Standard Test Method for Abrasion Resistance of Textile Fabrics (Martindale Abrasion Tester Method). standard by.
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Turn the power on. With disposable abradants, the abradant d49966 used only once or changed after limited use. The abradant must be changed accordingly at frequent intervals or checked periodically against a standard.
It is not surprising, therefore, to find that there are many different types of abrasion testing machines, abradants, testing conditions, testing procedures, methods axtm evaluation of abrasion resistance, and interpretation of results.
Placing the cut specimen with the technical face down into the gold ring. Preparation of Test Apparatus see manual 1.
ASTM D Test Method for Abrasion Resistance of Textile Fabrics
Observe and record the results after each batch of movements until you have Reached the desired number of movements total of Screw the handle back on. Note that all three parts of the specimen holders handle, face, and ring are numbered and correspond to numbers on top of the Martindale tester. Put specimens back on the machine and continue with the test.
While “abrasion resistance” and “durability” frequently are related, the relationship varies with different end uses, and different factors d496 be necessary in any calculation when trying to predict durability based on findings from specific abrasion tests.
As a minimum, the two astn should take a group of test specimens that are as homogeneous as possible and that are from a lot of material of the type in question. State that the specimens were tested as directed in Test Method D Fabrics of all types may be tested by this method, including woven, non-woven, and knit apparel fabrics, household fabrics, industrial fabrics, and floor coverings, but difficulties may arise with fabrics with a pile depth greater astj 2mm.
Resistance to abrasion is evaluated by various means, including comparison to visual aids in the form of photographs or actual samples. Competent statistical assistance is recommended for the investigation of bias. Assemble the holder by: Link to Active This link will always route to the current Active version of the standard. Make all tests in the standard atmosphere for testing. The between-laboratory precision of this test method is poor and, because of the nature of abrasion testing itself, technicians frequently fail to obtain results in agreement on the same type of testing instrument, both within and between laboratories.
Removing the silver covers held on by the black knobs. The resistance of textile materials to abrasion as measured on a testing machine in the laboratory is generally only one of several factors contributing to wear performance or durability as experienced in the actual use of the material. The average results from the two laboratories should be compared using Students t-test for unpaired data and an acceptable probability level chosen by the two parties before the testing is begun.
Push the green button to start the batch 3. In general, they should not be relied upon for prediction of actual wear-life in specific-end uses unless there are data showing the specific relationship between laboratory abrasion tests and actual wear in the intended end-use. Agreement between laboratories conducting this test is poor, but it is used widely, especially outside the United States. Permanent abradants also may change due to pick up of finishing or other material from test fabrics and must accordingly be cleaned at frequent intervals.
The test specimens then should be assigned randomly in equal numbers to each laboratory for testing. Fabrics of all types may be tested by this method but difficulties may arise with fabrics satm a pile depth greater than 0. Although this test method is not recommended for acceptance testing, it is useful because it is used widely, especially outside the United States. There are three adtm for testing abrasion resistance included in this method.
Standard Test Method f Report the type of abradant and the mass of the weights used. Weigh one specimen to determine pre-test mass.
The face must sit flush and square inside the ring. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in light of the known bias. State the average number of movements required to rupture two or more yarns in a woven fabric or develop a hole in a knitted fabric. Awtm permanent abradants that use hardened metal or equivalent surfaces, it is assumed that the abradant will not change appreciably in a specific series of tests, but obviously similar abradants used in different laboratories will ast, likely change at the same rate due to differences in usage.
Abrasion Resistance of Textile Fabrics Using Martindale
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Abrasion resistance is measured by subjecting the specimen to rubbing motion in the form of a geometric figure.
The end point is reached for a woven fabric when two or more yarns have broken, or for a knitted fabric when a hole appears. The measurement of the relative amount of abrasion also may be affected by the method of evaluation and may be influenced by the judgment of the operator. Using the smallest cutting die, cut six circular specimens from the fabric to be tested with each specimen being 1. Lifting the specimen holders out 3.
Loosening and lifting off the black knobs on top of the tester. The machine should already be programmed to run a batch atsm movements.
After the first batch is complete take specimen holders off of the machine and observe D4966 record the results and changes in specimens. This test method covers the determination of the abrasion resistance of textile fabrics.
Starting the abrasion tester 1.
Describe the material or product sampled and the method of sampling used. When using this equipment for scientific purposes, the fabric must be prepared according to ASTM F4966 The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
For the purposes of the Quality Assurance Class, you will be using Option 1. Historical Version s – view previous versions of standard. Add the required weight 9kpa for apparel, 12kPa for atsm by resting the weights on the ends of the handles. The end point if reached for a woven when two or more yarns have broken, or for a knitted fabric when a hole appears.