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The first heat-shrinkable sleeves were introduced [when?] as polyethylene pipeline coatings started to replace bituminous or tape coatings in the oil and gas industry. At the time, the processing for polyethylene to make the sleeve backing was new technology and the adhesives used in sleeves were much the same as those used on pipeline coating.
Polyolefin heat-shrink tubing typically shrinks 2:1 diametrically, [10] [9] but high-grade polyolefin heat-shrink is also available with a 3:1 ratio. [7] Polyolefin tubing may withstand being touched with a soldering iron. [10] PVC tubes are usually lower cost than other materials. [1]
Heat-shrinkable sleeve, for pipelines; Shrink wrap, for packaging This page was last edited on 28 December 2019, at 17:49 (UTC). Text is available under the Creative ...
Induction heating is a non contact heating process which uses the principle of electromagnetism induction to produce heat in a work-piece. In this case thermal expansion is used in a mechanical application to fit parts over one another, e.g. a bushing can be fitted over a shaft by making its inner diameter slightly smaller than the diameter of the shaft, then heating it until it fits over the ...
Shrink wrap, also shrink film, is a material made up of polymer plastic film. When heat is applied, it shrinks tightly over whatever it is covering. [1] [2] [3] Heat can be applied with a handheld heat gun (electric or gas), or the product and film can pass through a heat tunnel on a conveyor.
Several types of shrink tunnels are available. [3] [4] [5] The heat source can be based on heating element (electrical resistance), infrared heater, steam, or gas flame. Often forced air is used to improve convection, sometimes focusing the heat on one component of the item. Tunnels are available with or without a conveyor system.
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