Junction Box

SPC Method for Ensuring Optimal Junction Box Sealing Uniformity

Step 01 | Junction box
Prior to applying adhesive, cut and position a piece of Fujifilm Prescale® film on the bottom of the junction box and apply force | Junction box

Prior to applying adhesive, cut and position a piece of Fujifilm Prescale® film on the bottom of the junction box and apply force.



Step 02 | Junction box
Instantaneously and permanently the film captures both the pressure distribution and magnitude that occurs between the contacting surfaces | Junction box

Instantaneously and permanently the film captures both the pressure distribution and magnitude that occurs between the contacting surfaces.



Step 03 | Junction box
Final analysis: a pressure map | Junction box

Final analysis: a “pressure map”




Pressure Film Type Pressure Range
Extreme Low (LLLLW / 4LW)
7.2 - 28 PSI
(0.5 - 2 kg/cm²)
Ultra Low (LLLW)
28 - 85 PSI
(2 - 6 kg/cm²)
Super Low (LLW)
70 - 350 PSI
(5 - 25 kg/cm²)
Low (LW)
350 - 1,400 PSI
(25 - 100 kg/cm²)
Medium (MS)
1,400 - 7,100 PSI
(100 - 500 kg/cm²)
High (HS)
7,100 - 18,500 PSI
(500 - 1,300 kg/cm²)
Super High (HHS)
18,500 - 43,200 PSI
(1,300 - 3,000 kg/cm²)

Physical Specifications
Operating Temperature 41°F - 95°F (5°C - 35°C) much higher for brief exposure
Humidity Range 20% to 90% RH
Gauge (Thickness) 4 - 20 mils
Spatial Resolution From 5 - 15 microns
Substrate Polyethylene Terephthalate (PET)
Accuracy ± 10% visual, ± 2%
Utilizing optional optical measurement systems
Shelf Life 2 Years