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<p><b>1.1 </b>This International Standard specifies a method for the determination of the tensile breaking force and elongation</p>
<p>at break of glass yarns taken from packages.</p>
<p><b>1.2 </b>The method is applicable to various types of glass yarn (single, folded, cabled, strands, structures without twist,</p>
<p>rovings, etc.). It is basically intended for single, folded and cabled glass yarns having a diameter of less than 2mm,</p>
<p>or a linear density lower than 2000 tex , taken from packages. Heavier yarns may be also tested providing the test</p>
<p>conditions are acceptable to all interested parties.</p>
<p><b>1.3 </b>The method is not applicable to glass yarns which, in equilibrium with the standard atmosphere and under a</p>
<p>pre-tension of 5 mN/tex , are elongated by more than 0,5% . Such yarns can be tested using a lower pre-tension (for</p>
<p>example 2,5 mN/tex or 1 mN/tex ), acceptable to all interested parties. This would occur mainly when dealing with staple-</p>
<p>fibre yarns.</p>
<p>NOTE 1 Though the determination may be run on beamed yarn or on yarns taken from fabrics, the results must be considered</p>
<p>as indicative only.</p>
<p>NOTE 2 This test method is primarily intended for material characterization and quality control. Fibre-to-fibre abrasion and other</p>
<p>factors such as insufficiently uniform tension (catenary) will increase variability and generate low test values. This will consequently</p>
<p>impede accurate correlation between performance of the yarns and end use applications. Extreme care should be taken</p>
<p>in considering this method for specification purposes.</p>
<p>NOTE 3 Though this International Standard provides the possibility of determining the elongation at break, this practice is not</p>
<p>recommended, however. Indeed, a correct assessment of the elongation will only be obtained using an extensometer; it will not be</p>
<p>obtained by measuring the distance traversed by the moving clamp. On the other hand, experience shows that the use of an extensometer</p>
<p>is quite delicate and often causes damage to the specimen.</p>
Reģistrācijas numurs (WIID)
1934
Darbības sfēra
<p><b>1.1 </b>This International Standard specifies a method for the determination of the tensile breaking force and elongation</p>
<p>at break of glass yarns taken from packages.</p>
<p><b>1.2 </b>The method is applicable to various types of glass yarn (single, folded, cabled, strands, structures without twist,</p>
<p>rovings, etc.). It is basically intended for single, folded and cabled glass yarns having a diameter of less than 2mm,</p>
<p>or a linear density lower than 2000 tex , taken from packages. Heavier yarns may be also tested providing the test</p>
<p>conditions are acceptable to all interested parties.</p>
<p><b>1.3 </b>The method is not applicable to glass yarns which, in equilibrium with the standard atmosphere and under a</p>
<p>pre-tension of 5 mN/tex , are elongated by more than 0,5% . Such yarns can be tested using a lower pre-tension (for</p>
<p>example 2,5 mN/tex or 1 mN/tex ), acceptable to all interested parties. This would occur mainly when dealing with staple-</p>
<p>fibre yarns.</p>
<p>NOTE 1 Though the determination may be run on beamed yarn or on yarns taken from fabrics, the results must be considered</p>
<p>as indicative only.</p>
<p>NOTE 2 This test method is primarily intended for material characterization and quality control. Fibre-to-fibre abrasion and other</p>
<p>factors such as insufficiently uniform tension (catenary) will increase variability and generate low test values. This will consequently</p>
<p>impede accurate correlation between performance of the yarns and end use applications. Extreme care should be taken</p>
<p>in considering this method for specification purposes.</p>
<p>NOTE 3 Though this International Standard provides the possibility of determining the elongation at break, this practice is not</p>
<p>recommended, however. Indeed, a correct assessment of the elongation will only be obtained using an extensometer; it will not be</p>
<p>obtained by measuring the distance traversed by the moving clamp. On the other hand, experience shows that the use of an extensometer</p>
<p>is quite delicate and often causes damage to the specimen.</p>
