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Awning protective coverings
are technical wovens which must be not only functional
but also decorative. Awning protective coverings are high-performance
products which comply with stringent technical requirements.
Each production batch is subjected to comprehensive laboratory
testing. |
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Requirements such as
impermeability, rigidity, soil and water-repellent properties,
resistance against tearing and breaking, light fastness
and many other properties are determined, measured and
guaranteed by the weavers for all types of fabric. Although
only controlled, first-class fabrics are used in the manufacturing
process, there are however limits to the degree of perfection
attainable. |
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| Customers who have bought
awnings sometimes complain about certain aspects of the
fabric which cannot be completely excluded in spite of
today’s present level of technology. |
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Flex creases |
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occur during production and when folding up the sunshade.
When held against the light, the crease looks like a dark
line, especially when the shade is in pale colours.
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Waviness in
seams and panels |
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can occur along the side seams, around the seams and in
the middle of the panel. The fabric is laid double on
the seams which means when it is rolled up, the diameters
vary. The tension which results from the jointed arms
and the sagging of the winding shaft and/or the projection
profile may enhance this effect. The material will also
display waviness when water pockets form during heavy
rain. |
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Impermeability |
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Polyacryl sun protection fabrics are impregnated with
a water-repellent finish and remain rainproof if well
cared for and placed at a minimum slope of 14° during
short periods of light rainfall. During longer periods
of rain or during heavy rainfall, the awning must remain
closed or rolled up in order to avoid damage. If the fabric
has become wet, the awning must be projected for it to
dry.
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Elongation
of side panels |
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The fabric is tensed almost permanently by an active spring
system. Although seams act as reinforcement, they bear
most of the strain. When the fabric is rolled up, the
seams lie on top of each other and so the pressure and
tension on them are increased even more. The seams are
pressed down flat and thus increase in length so that
when the awning is projected, the side seams hang down
slightly. |
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A publication by the Bundesverband Konfektion Technischer
Textilien e.V.,
(German Association for the production of technical textiles)
Von-Parkstraße 60 , D–41061 Mönchengladbach,
Germany,
supported by the Bundesveband Rolladen + Sonnenschutz
e.V.,
(German association for blinds and sunshading systems)
Hopmannstr. 2, D-53177 Bonn, Germany |
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