Insulator Makes Life Better 
Current position: Orient > model >

Composite insulator rod material

The mechanical strength member of composite insulator is a fiberglass rod. The composite insulator rod, normally referred to as the core of the insulator, consists of between 70 and 75% by weight of axially aligned glass fibers bonded by an organic resin. The resin system can be either polyester or epoxy and the rod either cast or pultruded.

Composite insulator rod

Composite insulator rod

Today’s core is pultruded in various diameters with electrical grade glass fibers and polyester resin. Two critical process parameters in the pultrusion of fiberglass rod for insulators are pulling speed and temperature of the forming die.

Why choose rod for mechanical application and not for composite insulators?
An axial crack develops when the outside of the rod cures more quickly than the center of the rod. This occurs when either the die temperature is too high for the pulling speed or outside of the rod sets, shrinkage during curing of the bulk of the rod and produces an axial crack in the center of the rod.

Bonding of glass fibers to the polyester resin is affected by process parameters as well. In pulling glass fiber, the fiber is sized or treated chemically for protection against mechanical damage during handling. Optimum bonding requires compatibility of the chemical systems; otherwise, the rod may exhibit porosity and wick moisture by capillary. The rod may still be acceptable for mechanical applications but not for composite insulators.

Orient Power produce composite insulator rod made from fiberglass resin.

 

Relative Articles:
Composite insulator used in electrical apparatus and outdoor substations
Experience with composite insulator
Composite insulator low frequency wet flashover voltage test
Composite insulator power frequency dry flashover voltage test video

About Us - Composite insulator manufacturer
More than 30 years experience in power industry since 1978 as a composite insulator manufacturer in China, advanced manufacturing process, strict quality control test system, ISO certificated, excellent communication, considerate services, enable us to be a leading composite insulator manufacturer of composite insulator and polymer insulator.
Our Advantage
ISO 9001 certificate
5000h Aging Type Test Report
Considerate after-sale services
Patent Product and New Technique
Instant Response for Each Requirement

©2014 Zhengzhou Orient Power Co., Ltd All rights reserved. Tel/Fax: +86 371 86097078 
sales@composite-insulator.com  Orient is a composite insulator manufacturer for products of composite insulator and polymer insulator