Posted on May 2, 2019

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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Fabrics of all types may be tested by this method but difficulties may arise with fabrics with a pile depth greater than 0.

ASTM D Test Method for Abrasion Resistance of Textile Fabrics

Standard Test Method f With permanent abradants that use hardened metal d44966 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 not likely change at the same rate due to differences in usage.

With disposable abradants, the abradant is used only once or changed after limited use. There are three options for testing abrasion resistance included in atm method. When using this equipment for scientific purposes, the fabric must be prepared according to ASTM D It is not d44966, 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.

Loosening and lifting off the black knobs on top of the tester. Remove the specimen holders from the Martindale tester by sstm. Observe and record the results after each batch of movements until you have Reached the desired number of movements total of It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability sstm regulatory limitations prior to use.

Report the type of abradant and the mass of the weights used. Historical Version s – view previous versions of standard. The machine should already be programmed to run a batch of movements. As a minimum, the two parties should take a group of test specimens that are as homogeneous as asym and that are from a lot of material of the type in question.

Push the green button to start the batch 3. 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 d466 in light of the known bias. 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.

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For the purposes of the Quality Assurance Class, you will be using Option 1. Although this test method is not recommended for acceptance testing, it is useful because it is used widely, especially outside the United States.

Link to Active This link will always route to the current Active version of the standard. The end point is asm for a woven fabric when two or more yarns have broken, or for a knitted fabric when a hole appears. Abrasion resistance is measured by subjecting the specimen to rubbing motion atm the form of a geometric figure. 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.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Screw the handle back on. Make all tests in the standard atmosphere for testing. The end point if reached for a woven when two or more yarns have broken, or for a knitted fabric when a hole appears. Weigh one specimen to determine pre-test mass. Assemble the holder by: Resistance to abrasion is evaluated by various means, including comparison to visual aids in the form of photographs or actual samples.

State that the specimens were tested as directed in Test Method D Take care not to apply too much pressure on the cutting die as it will break the razor blades. Put specimens back on the machine and continue with the test. The face must sit flush and square inside the ring.

ASTM D4966

Agreement between laboratories conducting this test is poor, but it is used widely, especially outside the United States. 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. 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.

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Placing the cut specimen with the technical face down into the gold ring. Describe the material or product sampled and the method of sampling used.

Competent statistical assistance is recommended for the investigation of bias. 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.

Starting the abrasion tester 1. After the first batch is complete take specimen holders off of the machine and observe And record the results and changes in specimens. How the Test Works: 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. Add the required weight 9kpa for apparel, 12kPa for upholstery by resting the weights on the ends of the handles.

Lifting the specimen holders out 3. Using the smallest cutting die, cut six circular specimens from the fabric to be tested with each specimen being 1.

ASTM D – Test Method for Abrasion Resistance Martndale | Rycobel

This test method covers the determination of the abrasion resistance of textile fabrics. The test specimens then should be assigned randomly in equal numbers to each laboratory for testing. Place the assembled holders into the machine, xstm silver caps and black knobs. Set the counter system to record the desired movements wstm the third black button from the right. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

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. 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. Preparation of Test Apparatus see manual 1.