Heavy wall heat shrink tubing conforms to the size of wires connections or any electric conductors placed inside it. The tubing protects and insulates the wires. Polyolefin, a type of thermoplastic made from polymers, provides a material for the tubing. Manufactured to rigid specifications, it comes in a variety of shapes, sizes and colors, and when heated shrinks to the required size.
Tensile Strength
•This specification refers to the measurement of how far a material can be stretched before it loses its ability to hold its shape or tears apart. Heat shrinking tubing undergoes this testing with the minimum requirement for certification being 10.3 megapascal (MPa), or 1500 pounds per square inch (psi).
Operating Temperature Range
•This specification governs the temperature range at which the Heavy wall heat shrink tubing can be expected to function. The lowest temperature is 67 degrees below zero Fahrenheit with the maximum 275 degrees Fahrenheit. In order for the tubing to shrink to meet the needed size it must be heated to a minimum of 212 degrees Fahrenheit.
Diameter
•Heat shrinking tubing comes in different sizes to meet specific needs. When selecting Heavy wall heat shrink tubing the specifications will list the diameter of the tube prior to any action. Such a diameter can range from just over 1 millimeter (mm) or 0.0393700787402 inches, to over 100 mm, or 3.937 inches. The specification will then list the diameter of the tubing and the wall thickness after heating. For example, a 5.21 mm, or 0.205 inch, diameter tubing will shrink after heating to 2.36 mm, or 0.0929 inches with a wall thickness of 0.51 mm, or 0.02 inches.