ASTM D1335 Test Fikstürü

ASTM D1335 – Standard Test Method for Tuft Bind of Pile Yarn Floor Coverings

 

ASTM D1335 covers the measurement of force required to pull or break a tuft from a pile floor covering sample.

This test method is applicable to both cut and loop pile yarn floor covering.

Test Method ASTM  D1335 for tuft bind of pile yarn floor coverings is being used for acceptance testing of commercial shipments.

In case of a dispute arising from differences in reported test results using this test method, the purchaser and the supplier should conduct comparative tests to

determine if there is a statistical bias between their laboratories.

Competent statistical assistance is recommended from the investigation of bias.

As a minimum, the two parties should take a group of test samples that are homogeneous as possible and are from a lot of material of the type in question.

The test samples should then be randomly assigned in equal numbers to each laboratory for testing.

The average results from the two laboratories should be compared using appropriate statistical analysis, and a probability level chosen by the two parties before

testing begun.

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 with consideration to the known bias.

The satisfactory performance of a pile yarn floor covering depends to a considerable extent on the maintenance of its original appearance.

In a cut pile yarn floor covering an inadequate tuft bind may result in complete loss of pile in areas exposed to severe wear.

In a looped pile yarn floor covering with inadequate tuft bind the pile loops may be pulled out to form unsightly long loops which may be hazardous

The satisfactory performance of a pile yarn floor covering depends to a considerable extent on the maintenance of its original appearance.

In a cut pile yarn floor covering an inadequate tuft bind may result in complete loss of pile in areas exposed to severe wear.

In a looped pile yarn floor covering with inadequate tuft bind the pile loops may be pulled out to form unsightly long loops which may be hazardous.

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ASTM D1335 / Apparatus

ASTM D1335 / Tensile Testing Machine

Constant-rate-of-extension (CRE) type, conforming to Specification D 76, with a capacity selected such that the force required to complete the test falls within

15 to 85 % of full scale.

A full scale ranging from 4.45 N to 111 N (1 lbf to 25 lbf) is generally adequate.

For constant-rate-of-extension (CRE) type and constant-rate-oftraverse (CRT) type machines, the rate is 300 ± 10 mm/min (12 ± 0.5 in./min).

In case of controversy the CRE type tensile testing machine shall prevail.

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ASTM D1335 Metal Cylindrical Sample Holder

150 mm (6.0 in.) long made from 40 mm (1.5 in.) outside diameter tubing with a section 50 mm (2.0 in.) long portion of the tubing cut away.

The sample holder should be constructed in a manner that will permit clamping the test sample in the nonmeasuring, pulling clamp of the tensile testing machine or replacement of the nonmeasuring clamp by the sample holder.

Tuft Clamp, for use only with cut pile, consisting of tweezer-like clamp that can be used to grip a single tuft tightly enough to assure removal of the whole tuft from the pile yarn floor covering without slippage of the tuft in the tuft clamp. Alternatively, a hemostat3 can be used.

Loop Hook, for use only with loop pile, consisting of a hook which can be readily passed through the loop and hooked under the top of the loop. The hook should be made of wire having a diameter of at least 0.8 mm (1⁄32 in.) and should be constructed so that it can be clamped/attached to, or replace, the measuring clamp of the test machine