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The main job of the insulating material is to ensure that the conductors stay separated and there is no contact. In this post, PVC cables manufacturers will tell you more commonly found insulation material.

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types of cable insulation


The striking thing about technology is that it can be both wonderful and tragic. Electricity

is one of these wonders. All the gadgets, appliances and machines will not work without

some kind of electrical support somewhere. It is wonderful in its ability to transform our

life. But when left without any checks, it can wreck havoc, causing fire and destruction.

One of the safeguards we need is insulation. It is required in electrical cables to support

and separate conductors or wires inside it. The main job of the insulating material is to

ensure that the conductors stay separated and there is no contact. It reduces the chances of

overheating by friction. There are many materials used for insulation, such as PVC, XLPE

and even paper. PVC cables manufacturers are among the most preferred because of the

advantages that PVC offers.


A conductor in a cable transfers electricity from one point to another. For this reason it is

made of a highly conductible metal like copper or aluminium. But this also makes it quite

dangerous. An open wire is literally a live wire that is humming with electric current. What

happens when we leave it without any insulation

happens when we leave it without any insulation in a cable? The highly charged wires

would rub against each other, overheating almost instantly. Even a single conductor cable

if left uninsulated, will completely expose the wire within.

Insulation, hence, separates the conductors by keeping them wrapped. It also helps in

reducing any leakage of electricity from the wire within. It also keeps the conductors safe

from exposure to environmental factors. Without it, the wires will be exposed to sun, rain

and other corrosive materials like chemicals present in the atmosphere.

To do its job, an insulator must be exactly the opposite of a conductor. In theory, an

insulator should not carry any electric current. However, there is really no ideal insulator

because every material has some kind of resistance. But for our purposes, we simply need

a material with extremely high resistance. Popular insulation materials like PVC, XLPE

and rubber carry such qualities. From a manufacturing point of view, we need a material

that has high resistance and can be manufactured economically at an industrial scale. For

instance, PVC’s popularity is also in part because technology allows the PVC cables

manufacturers to produce these at an economical cost.

Types of insulation material:

The three more commonly found insulation material are plastics, fluoropolymers and

rubber. Materials like teflon, paper, ceramic and even oil is used sometimes. Let us look at

the first three materials:


This includes thermoplastic and thermoset plastics. The former includes PVC,PE, PVDF,

ECTFE and Nylon. Thermoplastic is tough yet pliable. However, it will melt when

subjected to high temperature. This is the most commonly found insulation, especially

PVC. The reason for PVC cables manufacturers high sales lie in the material’s durability,

wide availability and affordability.

the advantage of thermoset plastics over

The advantage of thermoset plastics over thermoplastic is its resistance to high temperature.

It can maintain its shape even under thermal expansion. Thermoset plastics include XLPE,

EPR and CPE.


Fluoropolymer is a fluorocarbon-based polymer. It is preferred for its ability to withstand

a wide temperature range. It is also known for its high resistance to corrosive factors like

solvents, bases and acids. It also has unique electrical and mechanical properties that make

it suitable for insulation. It includes PTFE, PFA, FEP, and ETFE. It has high non-stick

properties, which is useful in reducing friction. It is also highly stable. The manufacturing

technology is still improving and it is expected to grow significantly.


The electrons in a rubber molecule are tightly bound and cannot be taken apart easily. It is

this property that makes rubber such an excellent insulating material. Its elasticity and

resistance to water add to this quality. Both natural and synthetic rubber has been used for

insulation. Although, today it is the synthetic rubber that is used for the purpose. Examples

include, Thermoplastic Rubber, Neoprene, Silicone, Fiberglass, SBR, EPR, CSPE, and


These are the various types of cable insulation. PVC continues to be the most preferred

with PVC cables manufacturers supplying to a wide range of industries.