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The Awnings can be made with transparent plastics
By Carlos Mello
The Awning crystal, known as " transparent " curtain, it is
indicated for closing of atmospheres that need to protect
against the cold, the wind and the moderate rain, without losing
the visibility, because their main characteristic is the
transparency.
The awning crystal doesn't have the internal plot, therefore
their mechanics qualities are limited and inferior to the one of
the canvas of PVC. If be picked up wet and stay closed for some
time, the water doesn't evaporate and " penetrates " in the
crystal, leaving it with a characteristic " milk ".
This problem will disappears completely after some time open "
taking sun ".
The manufacturing of the awning crystal is in two ways:
Horizontal welds:
Less numbers of welds, however can have shrink in the width
after some weeks, because the product doesn't possess the
internal plot. Due to the static energy generated by the
attrition in the rolling up and the extremely flat surface, the
awning Crystal " glues " if it is coiled for several hours.
Vertical welds (recommended):
There will be a weld on average each 1.35 meters and whole
strips are used.
In the center or in the extremities there will be a smaller
strip in agreement with the use of the material. In the lateral
ones, there will be reinforcement in Crystal (equal the
amendment) of 2.5 centimeters.
In the sense of the vertical welds the shrink doesn't exist,
however, when opening the awning crystal they will appear waves,
which will disappear in few minutess.
Comparing with the horizontal weld, that vertical method " glues
" less when coiled.
About the Author:
Carlos Mello is the Director of Arquitetoldos, an awnings
manufacturing company. See the sites
http://www.amx.com.br/toldos and
http://toldos-toldo-coberturas-aluguel-dias-rio-de-janeiro-recrei
o.us .
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