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Home > News > Chemicals

K 2025: WACKER to unveil silicone rubber for composite insulators

Source：Adsale Plastics Network Date ：2025-07-25 Editor ：RC
Copyright： This article was originally written/edited by Adsale Plastics Network (AdsaleCPRJ.com), republishing and excerpting are not allowed without permission. For any copyright infringement, we will pursue legal liability in accordance with the law.

WACKER will unveil its new high-consistency silicone rubber, specifically designed for the production of composite insulators with extruded silicone housing, at K 2025.


WACKER_hollow core insulator.jpg


Hollow-core insulators for high-voltage engineering.


Watch also: Pre K | Innovative silicone solutions from WACKER


Silicones in power engineering

 

Silicone elastomers have been a regular feature in high-voltage engineering for decades. As a high-performance insulating material, they possess numerous properties that no other material can match in this combination.

 

In addition to high tracking, erosion and arc resistance, silicones are extremely resistant to weathering and UV radiation. They can withstand heat, cold and extreme temperature fluctuations. The water-repellent surfaces of the cured elastomer are yet another typical feature of silicone elastomers: they remain water-repellent even when polluted.

 

This property, known in technical jargon as “hydrophobicity” and “hydrophobicity transfer”, prevents the formation of electrically conductive layers of water, dirt and salt, which can lead to electrical failure of the insulator due to flashovers.

 

Hollow core insulators

 

Composite hollow-core insulators come under the category of composite insulators. They are basically made up of a hollow, electrically non-conductive tube with annular insulator housing on the exterior made of an electrically nonconductive material.

 

Hollow core insulators are used for electrotechnical equipment such as bushings, instrument transformers, circuit breakers or surge arresters. They can be imposing in size, especially when it comes to high voltage application. Diameters of over one meter and lengths of over ten meters are not uncommon.

 

Thanks to their comparatively low weight, composite hollow core insulators are much easier to install than conventional insulators made out of ceramics. Weight savings may add up to 80 percent.

 

WACKER’s POWERSIL 1900 A/B

 

WACKER supplies POWERSIL 1900 A/B as a ready-to-use 2K high consistency silicone rubber. The product cures by addition curing to form an electrically insulating silicone elastomer with excellent resistance to tracking, erosion, and arcing. No by-products are released during curing.

 

The insulating housing with its sheds has water and dirt-repellent surfaces. Unlike porcelain or glass, they retain their excellent dielectric properties even when used continuously in salty or dusty conditions or exposed to rain and high humidity. Rain and dirty water simply drip off the water-repellent silicone housing. In most cases, this also eliminates the need for costly cleaning operations of composite insulators.

 

As an elastomer, POWERSIL 1900 A/B has very good mechanical properties. It is UV-resistant and, thanks to its elasticity, can withstand all kinds of weather, earthquakes and vandalism far better than other materials. Silicone elastomers thus also improve power grid resilience and ensure a secure power supply.

 

POWERSIL 1900 A/B is used to manufacture hollow core insulator components through spiral extrusion process. The silicone elastomer is extruded onto a continuously rotating insulating tube, thus ensuring a thoroughly even application of the intricate outer sheds. Thanks to this process, the production of conical shapes, which is often not feasible with conventional injection-molding techniques, is now possible.

 


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 DONGGUAN GENVAN SILICONE TECHNOLOGY CO., LTD.      

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Source：Adsale Plastics Network Date ：2025-07-25 Editor ：RC
Copyright： This article was originally written/edited by Adsale Plastics Network (AdsaleCPRJ.com), republishing and excerpting are not allowed without permission. For any copyright infringement, we will pursue legal liability in accordance with the law.

WACKER will unveil its new high-consistency silicone rubber, specifically designed for the production of composite insulators with extruded silicone housing, at K 2025.


WACKER_hollow core insulator.jpg


Hollow-core insulators for high-voltage engineering.


Watch also: Pre K | Innovative silicone solutions from WACKER


Silicones in power engineering

 

Silicone elastomers have been a regular feature in high-voltage engineering for decades. As a high-performance insulating material, they possess numerous properties that no other material can match in this combination.

 

In addition to high tracking, erosion and arc resistance, silicones are extremely resistant to weathering and UV radiation. They can withstand heat, cold and extreme temperature fluctuations. The water-repellent surfaces of the cured elastomer are yet another typical feature of silicone elastomers: they remain water-repellent even when polluted.

 

This property, known in technical jargon as “hydrophobicity” and “hydrophobicity transfer”, prevents the formation of electrically conductive layers of water, dirt and salt, which can lead to electrical failure of the insulator due to flashovers.

 

Hollow core insulators

 

Composite hollow-core insulators come under the category of composite insulators. They are basically made up of a hollow, electrically non-conductive tube with annular insulator housing on the exterior made of an electrically nonconductive material.

 

Hollow core insulators are used for electrotechnical equipment such as bushings, instrument transformers, circuit breakers or surge arresters. They can be imposing in size, especially when it comes to high voltage application. Diameters of over one meter and lengths of over ten meters are not uncommon.

 

Thanks to their comparatively low weight, composite hollow core insulators are much easier to install than conventional insulators made out of ceramics. Weight savings may add up to 80 percent.

 

WACKER’s POWERSIL 1900 A/B

 

WACKER supplies POWERSIL 1900 A/B as a ready-to-use 2K high consistency silicone rubber. The product cures by addition curing to form an electrically insulating silicone elastomer with excellent resistance to tracking, erosion, and arcing. No by-products are released during curing.

 

The insulating housing with its sheds has water and dirt-repellent surfaces. Unlike porcelain or glass, they retain their excellent dielectric properties even when used continuously in salty or dusty conditions or exposed to rain and high humidity. Rain and dirty water simply drip off the water-repellent silicone housing. In most cases, this also eliminates the need for costly cleaning operations of composite insulators.

 

As an elastomer, POWERSIL 1900 A/B has very good mechanical properties. It is UV-resistant and, thanks to its elasticity, can withstand all kinds of weather, earthquakes and vandalism far better than other materials. Silicone elastomers thus also improve power grid resilience and ensure a secure power supply.

 

POWERSIL 1900 A/B is used to manufacture hollow core insulator components through spiral extrusion process. The silicone elastomer is extruded onto a continuously rotating insulating tube, thus ensuring a thoroughly even application of the intricate outer sheds. Thanks to this process, the production of conical shapes, which is often not feasible with conventional injection-molding techniques, is now possible.

 


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K 2025: WACKER to unveil silicone rubber for composite insulators

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