The literature recognizes rubber-coated fabrics, however the coverage is not limited to rubber, and extends to similar types of polymer coatings on textiles. Types of coatings that are commonly used include plastic material as well as teflon PTFE. This allows the material to acquire multiple hybrid properties, such as a textile becoming stronger or more stain or wear resistant. Waterproof textiles are also usually tested to one or more of these standards.
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ASTM D specifies a testing machine with three main parts: Straining mechanism Clamps for holding specimens Load and elongation recording mechanisms. ADMET universal testing machines include the straining mechanism item 1 and built in load and elongation recording mechanisms Item 3. Elongation Test is done at the same time as the breaking strength test so grips are the same. Bursting Strength This fixture holds a piece of fabric securely on the top and bottom surface an exposed a circular area of fabric.
The other part of the fixture is a polished steel ball that is mounted to the top of the machine which is used to burst the fabric. Puncture Resistance This fixture is the same as used for the bursting test but the polished steel ball is replaced with a sharp pointed instrument. Tearing Strength — Procedure B: Tongue Tear Method Same vise grips used for the Breaking Strength test but replaced the 25mm x 25mm front jaws with 25mm tall x 50mm wide jaws so you have a set of four 25mm x 50mm jaws.
Trapezoidal Tear Same vise grips used for the Tearing Strength test Adhesion Coating to Fabrics Same vise grips but jaws should be 25mm tall x 75mm wide Tack-Tear Resistance This test requires a specialized grip fixture that is used only for this test.
It is complicated, and the design can be seen in the specification. Seam Strength Same grips as described in Adhesion Coating to Fabrics test Dead Load Seam Strength Same vise grips as specified in the other tests Crush Resistance This test deflects the material over a button shaped compression platen until the material is crushed or cut.
This test requires a unique compression fixture, the exact dimensions of which can be found in the specification. Tack-tear fixture Crush resistance test fixture. Of course, not all of these are needed if you are only doing a certain test within this specification.
ASTM D751 Coated Fabric Tensile Testing