Fashion designers know which fabric shows which drape and work specifically with these properties.For pleated helsa activated carbon filters flexural rigidity is an important parameter.Elastomer coated membranes from helsa are 0.16-0.4 mm thick, extremely thin and thus have a low bending stiffness value.
29.05.2019 helsapedia

helsa ABC

B as in bending stiffness

A strange word, right? The terms "bend" and "stiff" do not seem to fit together. Today. We bring light into the dark! Are you coming with us into the world of fabrics?

Every dressmaker will tell you that the properties of a fabric have a big impact on the appearance of the finished garment. Whether a skirt is sewn of thin muslin or stiff raw silk – it makes a huge difference: Once he falls fluently and once he has a good stand.

And with that we are already at "bending stiffness".

It is the measure that defines how much resistance a material provides against curvature - how long it stays stiff even though it is bent.

An example for you. If you push a wax tablecloth over the edge of the table, how long does it stay stiff and when does it break off and fall down?

In research, of course, this is measured a little more professionally and it’s made with a textile-physical examination, for example, the procedure according to cantilever.

Flexural stiffness is calculated from E x I and is given in Nmm2. E is the modulus of elasticity in (N/mm2) and I the area moment of inertia in (kg/m2). The smaller the value, the more flexible the material. The larger the value, the stiffer it is. So 500 Nmm2 are about a light summer dress, 20,000 Nmm2 a voluminous taffeta dress.

If we leave the world of textiles again, the degree of flexural rigidity applies quite generally to all materials whose bending behavior is of interest. For example, cardboard, leather, plastic, rods or plates are examined because their stability has a significant influence on their intended use.

Seite drucken