People change clothes every day, depending on the season, time
of day, circumstances, and scene. For example, on a summer day
we might wear a T-shirt with good permeability for air, but in
cold winter weather, we would wear a down jacket with a high
heat-retaining property. People who work at actual worksites
wear work clothes that are made of sturdy material and allow
easy movement. Thus, various types of performance are required
in clothing, depending on which value that the wearer prioritizes,
e.g. comfort, functionality, or design, and new products are
appearing daily to meet these needs.
Since clothing is a product, strength evaluation is necessary
in order to maintain a certain quality. JIS L 1096 : 2010 not
only provides methods for measuring the tensile strength
and tear strength of the woven and knitted fabrics that are
indispensable in our daily lives, but also describes various
evaluation methods for the permeability of fabrics to air and
their heat-retaining property. Among these, the JIS and ISO
methods include a total of 6 test methods for tensile strength.
There are 4 JIS methods, method A (strip method), method B
(grab method), method C (wet strip method), and method D
(wet grab method), and 2 ISO methods, method E (strip
method) and method F (grab method).
This article introduces an example of a tensile test of fabric
specimens by method A (strip method).