Things Affecting Compressive Force on Your Part
Hi-Shrink Tape chosen
A.) Film thickness - compressive force increases as film thickness is increased
B.) Shrink percentage - compressive force increases as shrink percentage is increased
- The tension at which you apply the tape—higher taping tension will increase the compressive force to the part
- Diameter of the part—smaller diameter=more compaction force
- The number of layers of tape applied
A.) As the number of layers of tape increases, so does the compressive force is exerted on the part. Decreasing the layers of tape will decrease the force on the part.
B.) Increasing your overlap percentage effectively increases the number of layers of tape you are applying to the part
How do you apply Hi-Shrink Tape to the part?
Hi-Shrink Tape is applied by spiral wrapping the tape over the outer surface of the part. The starting end of the tape can be secured with an initial wrap over itself, or by using a small piece of adhesive tape to hold it in place. Continue to wrap the tape in a spiral manner around the circumference of the part, moving lengthwise down the part with each successive wrap. Be sure to wrap each subsequent layer of tape on itself with the same degree of overlap (see image below). If you're not sure how much overlap to use, start with 50%, and then determine after part cure if you need more or less compaction force. If more force is required, increase your overlap percentage, and decrease overlap if less force is required.
This photo shows a cured part with the tape removed. The tape lines indicate an even overlap percentage during the taping process.