The back throws soft curtain technical parameter

 the  project      Parameter 
size      May defer to the customer to need the size to provide
surface      Specialized research and development trace 
material      Special PVC material quality 
gain      2.0 
may the angle of view     1/2 gain angle of view 60 degrees 
visible angle of view:  180 degree 

 tensile strength 

 is biggest:      203 kg/square centimeters 
average:     180 kg/square centimeters
the  peel strength is biggest: 5.8 kg/mm 

 average:         5.4 kg/mm
the  expansion rate is biggest: 296% 

 average:        232%
the  heating contracts 4% 

 thickness 0.28 mm

the  back to throw the transmittance    50%