BS EN 14704-3:2006 – Determination of the elasticity of fabrics—— Part 3: Narrow fabrics
1 Scope
This standard describes the test methods which can be used to measure the elasticity and related propertiesof narrow fabrics,Two methods are ilemised;ane for the purpose of product quality assurance(method A).and the olther for product performance when in use (method B).
2 Normative references
The following referenced documents are indispensable for the application of this document. For datedreferences,only the edition cited applies. For undated references， the latest edition of the referenceddocument (including any amendments) applies.
EN ISO 139,Texfiles – Standard atmospheres for conditioning and testing (1So 139.:2005)
EN ISO 7500-1,Metallic materials – Verification of static uniaxial testing machines – Part 1:
Tensionvcompression testing machines -Verification and calibratbion of the force-measuring systerm (ISo7500-1;2004)
EN ISO 10012，Measurement management systems – Roquirements for measurerment processes andmessuring equiprnent (SO 10012:2003)
3Terms and definitions
For the purposes of this European standard the following terms and definitions apply.
3.1
narrow fabric
woven or knited construction lintended for use as a trim, binding.edging. strapping or harmness,and designedto be used in its full width
3.2
ellasticity
property of a material by virtue of which it tends to recover its originall size and shape immediately afierremoving the force causing deformation
3.3
constant-rate-of-extension (CRE) testing machilne
tensile testing machine provided with one clamp which is stationary and another clamp, which moves with aconstant speed throughout the test, the entire testing systerm being virtually free from deflection
3.4
strip test specimen
test specimen in which the full width is gripped in the jaws of the testing machine
3.5
gauge longth
distance between the two efflective clamping points of a testing device, for this method where line clamps areemployed, it is the distance between the two contact points
3.6
sllack mounting
insertion of a strip test specimen in the line clamps of the upper jaw, allowing it to hang freely under its ownweight, gulded by the hand to ensure perpendicular alignment to the line of pulling force,without any forcebeing applied
BS EN 14704-3:2006 – Determination of the elasticity of fabrics—— Part 3: Narrow fabrics