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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This test method covers the determination of asfm abrasion resistance of textile fabrics. Using the smallest cutting die, cut six circular specimens from the fabric to be tested with each specimen being 1.

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. With permanent abradants that use hardened metal or equivalent f4966, 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 not likely change at the same rate due to differences in usage.

Place the assembled holders into the machine, replacing silver caps and black knobs. 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.

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. Lifting the specimen holders out 3. The end point if reached for a woven when two or more yarns have broken, or for a knitted fabric when a hole appears.

Push the green button to start the batch 3. There are three options for testing abrasion resistance included in this method.

ASTM D – Test Method for Abrasion Resistance Martndale | Rycobel

The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

Loosening and lifting off the black knobs on top of the tester. 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 than 2mm.

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. State the average number of movements required to rupture two or wstm yarns in a woven fabric or develop a hole in a knitted fabric. Fabrics of all types may be tested by this method but difficulties may arise with fabrics with d44966 pile depth greater than 0.

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Assemble the holder by: As a minimum, the two parties 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. While “abrasion resistance” and “durability” frequently are related, the relationship varies d4696 different end uses, and different factors may be necessary in any calculation when trying to predict d496 based on findings from specific abrasion tests.

Removing the silver covers held on by the black knobs. atm

Observe and record the results after each batch of movements until you have Reached the desired number of movements total of Historical Version s – view previous versions of standard. The resistance of textile materials to abrasion as measured on a testing machine in the laboratory is astn only one of several factors contributing to wear performance or durability as experienced in the actual use of the material.

Abrasion Resistance of Textile Fabrics Using Martindale

Take care not to apply too much pressure on the cutting die as it d44966 break the razor blades. The machine should already be programmed to run a batch of movements. Describe the material or product sampled and the method of sampling used.

After the first batch is complete take specimen holders off of the machine and observe And record the results and changes in specimens. Resistance to abrasion is evaluated by various means, including comparison to visual aids d496 the form of photographs or actual samples. Avoid getting oil, water, grease, etc. Competent statistical assistance is recommended for the investigation of bias. 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.

Weigh one specimen to determine pre-test mass. The face must sit qstm and square inside the ring. It is not surprising, therefore, to find that there are many different types of abrasion testing machines, abradants, testing conditions, testing procedures, methods of evaluation of abrasion resistance, and interpretation of results. State that the specimens were tested as directed in Test Method D Placing the cut specimen with the technical face down into the gold ring.

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Screw the handle back on. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Agreement between laboratories conducting this test is poor, but it is used widely, especially outside the United States.

ASTM D Test Method for Abrasion Resistance of Textile Fabrics

Standard Test Method f The abradant must be changed accordingly qstm frequent intervals or checked periodically against a standard. Set the counter system to record the desired movements using the third black button from the right. With disposable abradants, the abradant is used only once or changed after limited use.

The end d4966 is reached for a woven fabric when two or more yarns have broken, or for a knitted fabric when a hole appears. Remove the specimen holders from the Martindale tester aztm a. When using this equipment for scientific purposes, the fabric must be prepared according to ASTM D The test specimens then should be assigned randomly in equal numbers to each laboratory for testing. Report the type of abradant and the mass of the weights used. 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.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and d9466 the applicability of regulatory limitations prior to use. Add the required weight 9kpa for apparel, 12kPa for upholstery by resting the weights on the ends of the handles.

Make all tests in the standard atmosphere d496 testing. Put specimens back on the machine and continue with the test. Starting the abrasion tester 1.

Preparation of Test Apparatus see manual 1. 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.