ASTM D2724 Test Fikstürü

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ASTM D2724 – Standard Test Method for Bond Strength of Bonded, Fused, and Laminated Apparel Fabrics

 

ASTM D2724 covers procedures for characterizing the bond strength of bonded, fused, and laminated apparel fabrics before or after drycleaning and laundering.

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ASTM D2724 / Summary of Test Methods

Bench marks are placed at specified distances on the fabrics, which are then measured, and subsequently drycleaned, or laundered and dried, or both, through

a prescribed cycle that is repeated a specified number of times.

The drycleaned or washed specimens are examined for appearance and delamination and measured to determine any accompanying shrinkage and, if desired,

tested to determine the strength of the bond.

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Significance and Use

These test methods for the determination of properties of bonded, fused, or laminated apparel fabrics, are considered satisfactory for acceptance testing of commercial

shipments of bonded and laminated apparel fabrics since the methods have been used extensively in the trade for acceptance testing.

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ASTM D2724 / Apparatus

Tensile Testing Machine, conforming to Specification  ASTM D76, either a constant rate of traverse type9 or a constant rate of extension type, equipped with

clamps having a width of 76.2 mm (3.00 in.) and preferably calibrated in kilograms with a range from 0 to 4.5 kg (0 to 160 oz).

The constant rate of extension type machine is preferred because of the inherentlylower machine-induced errors in this type of machine.

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ASTM D2724 / STRENGTH OF BOND (OPTIONAL)

Bond strength tests may be made on the fabric as bonded or laminated, or after the three specified drycleaning cycles or after the five specified laundering cycles.

These tests also may be made on dry specimens (conditioned in the standard atmosphere for testing textiles for a minimum of 4 h), or on wet specimens

(saturated with perchlorethylene at room temperature following the drycleaning tests or saturated with water at room temperature following the laundering tests).

Alternatively, following the drycleaning tests, wet strength-of-bond tests may be made on flame-laminated fabrics with the specimens saturated in water instead of

perchlorethylene.

An interlaboratory test run in 1975 showed no significant differences between perchlorethylene and water in wet tests on flamelaminated fabrics.

However, there were significant differences on adhesive-bonded fabrics.

Therefore, water is not a suitable substitute for perchlorethylene in wet tests on these fabrics

*** Before conducting ASTM D2724 , it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.

 

***PARSROS  offers several types of grips and fixtures which will enable you to perform a variety of tests

  that are accurate and repeatable.