Difference between cold shrink and heat shrink tube
Time: 2015-07-23 13:10:29     Copyfrom: volsun

Cold shrink and heat shrink tube have different applications, installation techniques, and physical properties. Make sure you know when to use each type.

How to use:

Cold shrink tube: Easy installation comes stretched over a removable plastic core,allowing the tube to be slid over the application, the core removed and the tubing will contract to create a watertight-seal around the cable or connection due to the 'active memory' contained within theepdm rubber or silicone material .

Heat Shrink tube: Also comes pre-stretched but as a sleeve rather than over a removable core. The sleeve requires a heat source for installation, usually from a gas torch, to heat the polyolefin tubing so that it shrinks to its original size, creating a seal over the cable or joint.

Physical properties:

Cold shrink tube has excellent weather resistance, ultraviolet aging resistance and higher embrittlement resistance than heat shrink tubing.It is simple ,safe installation, requires no tools or special training. No torches or heat work required.

Heat shrink tubeis resistant to most chemicals and also becomes very rigid once it has been heated, therefore making it a good choice for mechanical protection. However, the downside to this rigidity is the products inability to expand and contract with the cable, meaning an environmental seal cannot be maintained without the aid of hot-melt adhesives or mastic tapes.

Application

Cold shrink tube:  Primary  electrical insulation for all solid dielectric (rubber and plastic) insulated wire and cable splices rated to 1000volts Meets ANSI C119.1, directly.buriable or submersible .For indoor, outdoor, or overhead use.

Heat shrink tube :Not suited for installation areas experiencing high heat or humidity, but are ideal for use in most industrial/commercial installations and where chemical resistance is required.

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