ASTM D5372 Test Fixture

Description

ASTM D5372 – Standard Test Method for Stiffness of Nonwoven Fabrics Using the Cantilever Test

 

ASTM D5372 covers stiffness properties of nonwoven fabrics by employing the principle of cantilever bending of the fabric under its own weight.

Bending length is measured and flexural rigidity calculated.

This test method applies to most nonwoven fabrics that are treated or untreated, including those heavily sized, coated, or resin-treated.

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ASTM D5372  / Significance and Use

This test method may be used for acceptance testing of commercial shipments of nonwoven fabrics, however, caution is advised since information about

between-laboratory precision is incomplete.

This test method measures the drape stiffness of the nonwoven fabric.

This test is not, however, suitable for very limp fabrics or those that show a marked tendency to curl or twist.

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ASTM D5372  / Apparatus

Cantilever Bending Tester

Horizontal Platform, with a minimum area of 38 by 200 mm (1.5 by 8 in.) and having a smooth low-friction, flat surface such as polished metal or plastic.

A leveling bubble shall be incorporated in the platform.

Indicator, inclined at an angle of 0.724 rad (41.5°) below the plane of the platform surface.

Movable Slide, consisting of a metal bar not less than 25 by 200 mm (1 by 8 in.) by approximately 3 mm (1⁄8 in.) thick and having a mass of 270 ± 5 g (0.6 ± 0.01 lb).

Scale and Pointer, to measure the length of the overhang.

Motorized Specimen Feed Unit, set for 120 mm/min (43⁄4 in./min), preferred. Manual units are permitted.

Analytical Balance, having a capacity and sensitivity to weigh within ± 0.1 % of the weight of the specimens being tested.

 Cutting Die, 25 by 200mm ± 1 mm (1 by 8 in. ± 0.002in.)

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ASTM D5372  / Summary of Test Method

Aspecimen is slid at a specified rate in a direction parallel to its long dimension, so that its leading edge projects from the edge of a horizontal surface.

The length of the overhang is measured when the tip of the specimen is depressed under its own weight to the point where the line joining the top to the edge of

the platform makes a 0.785 rad (41.5°) angle with the horizontal.

The stiffer the fabric, the longer it takes to bend, thus, the higher numbers indicate a stiffer fabric.

*** Before conducting ASTM D5372 , 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.