It is important to understand the technology employed in heat-shrink fusion splice sleeves in order to install them correctly and to prevent potential problems. Many users believe that setting the oven temperature as high as possible and the time to a minimum will give them faster splicing. This is true to an extent, however, as with all processes, there is a limit beyond which faster installation may cause poor results.
Some ovens are factory set and not easily changed by the user, while others have programs that may be selected to suit the application.
The properties of the inner meltable sleeve and the outer heat-shrink are chosen such that the inner sleeve starts to melt and flow at a lower temperature than that at which the heat-shrink recovers. This is important to prevent undesirable forces being applied to the fiber joint and to ensure optimum encapsulation.
Problems can arise if the temperature rise gradient of the oven is too steep and the time interval between the inner sleeve melt/flow point is too close to the point at which the heat-shrink starts to shrink.
Please refer to the Setting Guide below for our recommendations. Please note that these are dependent on the type of oven used and the length of splice.
Product Range
Temperature (degree C)
Time (seconds)
Stainless Steel Pin Range
6A Micro (6A-U)
120
30
6A Mini (6A-PS)
120
30
6A Midi (6A-M)
120
30
5A Standard (PS-5A)
125
60
3A Standard (PS-3A)
125
60
3A US (PS-3A-US)
125
60
3A US Large (PS-3A-USL)
125
60
1AS Large (PS-1A-S)
140
60
1A Large (PS-1A)
140
60
2A Extra Large (PS-2A)
140
120
Non Metal Pin Range
3D FRP pin (PS-3D)
125
60
Pinless Range
6A Micro (6A-UNP)
120
30
6A Mini (6A-NP)
120
30
154 Mini (PS-154)
120
45
3A Standard (PS-3A-NP)
125
45
Ceramic Pin Range for Mass Ribbon Fiber
Ribbon (PS-94)
125
60
Ribbon (PS-99)
140
120
