Heat Shrink Tubing is , in the simplest sense, a shrinkable plastic tube that shrinks when heated. It is used to insulate for the insulation of wires and provide it provides abrasion resistance. It is can also be used to bundle groups of wires, or , in some cases, provide identification. Heat The one great feature of heat shrink tubing will shrink its is that there is little or no shrinkage along the length, only shrinkage along the diameter , when heated to a specific temperature, with little or no shrinkage along its length. <br \>Polyolefin is the most commonly used Some materials for heat shrink tubing material. It is used by militaryare Polyolefin, automotive, railway and aerospace industries. <br \>Other materials include PTFE, Viton, Silicone Rubber and PVC, of which polyolefin is the most commonly used.<ref name = "ref1">http://www.jttproducts.com/jt-t-tech-articles/An-Introduction-to-Heat-Shrink-Tubing</ref>

=== Single v/s Dual Heat Shrink <ref name = "ref1"/> ==='''Single / Thin wall tubing''' is the most common. This tubing provides a good seal thereby providing protection against water and other contaminants. It Connections are also strengthens connectionsstrengthened, reducing decreasing the likelihood they can pull chances of them pulling apart. However it achieves this through friction only and typically does not bond with the material it shrinks to. The strength is increased by friction only. <br \>'''Dual Wall''' or Adhesive adhesive Lined tubing features an adhesive lining. It , which melts as the tubing contracts forming a truly sealed connection. Thus, here a bond is established with the material the tube shrinks to. It also dramatically drastically increases the strength of connections, even making taking it stronger than beyond the strength of the wires themselves.

=== Importance Applications <ref name = "ref1"/> ===

* Seal It protects against water and other contaminants out of wire connections.* Provide It provides electrical insulation. Heat shrink material is an insulator. * Insulate It protects against extreme heat.* Color code wire It can be used for easy identificationif the tubing is color coded.* Bundle It can help to bundle multiple wires together.* Cleanly It helps cleanly terminate ends of braided sleeving* Improve It helps improve the overall look aesthetics of large amounts of wiring

Heat As explained above, heat shrink tubing provides extensive increases strength, providing increased durability , and also improves heat resistance. In Therefore, in most cases, it outperforms performs better than basic insulation. Additionally, heat shrink tubing is built to provide the perfect fit and will does not come off with age or use , and it made to provide perfect fit (the same which cannot be said for electrical tape).Heat shrink tubing is also generally easy to install. Some heat shrink tubing requires costly heat shrink machinery, but some tubing can be installed manually, but some require extra machinery.<ref name = "ref2">http://ramproducts.com/6-things-need-know-heat-shrink-tubing/</ref>

Heat shrink tubing was invented by Raychem Corporation. It is manufactured from a thermoplastic material such as polyolefin, fluoropolymer (such as FEP, PTFE or Kynar), PVC, neoprene, silicone elastomer or Viton. <ref>https://en.wikipedia.org/wiki/Heat-shrink_tubing</ref> <br \>The material is quite often cross-linked through the use of using electron beams, peroxides, or moisture. This cross-linking helps creates the memory in the tubing so that which helps it is able to shrink back to its original extruded dimensions upon after heating.<ref name = "ref1"/>