Presspahn Fibre Jointing

ASG offer a host of non-metallic materials from a number of reputable worldwide suppliers and manufacturers, most of which are designed for specific applications.  One such range of products from our vast catalogue are a selection of Fibre Joining materials, each of which consists of a varied choice of material types and their own unique set of properties.  

One of these materials is Presspahn, also know in the industry as pressboard, press paper, presspahn transformer insulation paper and elephantide. Presspahn fibre jointing is often used for the production of electrical insulation gaskets as the material doesn’t allow the free flow of electrical current,  protecting electrical conductors from coming into contact with people or tools during installation, repairs or when an electrical appliance or device is being used.  

Presspahn Fibre Jointing materials are manufactured in a paper form on a roll available in thicknesses from 0.13mm to 1mm thick and also in rigid board from 0.5mm to 25mm. 

These materials can be taken as a full roll or sheet, or alternatively converted using one of our many on-site saws, presses or our oscillating knife, we are able to convert them into bespoke sized strips, washers, pads or gaskets which can be supplied plain or coated in a choice of self-adhesives or foils. 

Material Enquiry

For information on Presspahn Fibre Jointing please complete the following quick enquiry or call us on +44(0)1384 252555.

    Characteristics of Presspahn Fibre Jointing

    • Colour: Natural/brown
    • Thickness:
      • Presspahn Paper: 0.13mm - 0.5mm
      • Presspahn Board: 1mm - 25mm
    • Density: 1-1.3g/cm
    • Voltage Strength (in oil): 35-40Kv/mm (depending on thickness)
    • Temperature:  105℃

    Full technical data can be supplied upon request, or downloaded from our online portal.

    Help and guidance

    If you would like to speak to a representative to discuss your specific application or requirements please call our sales office direct on 01384 469100, alternatively you can send an E-mail. Simply click on the link and forward us your details along with your question and we will contact you immediately.

    Samples - Technical Presspahn Fibre Jointing

    Samples can be submitted for testing upon request.

    Call now for sample requests or further help.

    What is Presspahn Fibre Jointing?

    Most people will naturally choose sponge or rubber when looking for a compressible material for sealing and gasketing applications, however in many cases,  a ‘fibre’ based material could also be an option.  Fibre jointing material is made of fibre strands held together with a resin and then compressed under extreme pressure to create the rigidity.  

    Presspahn Fibre Jointing is used as an electrical insulation gasket material, formulated to create barriers, restricting the free-flow of electrical current. Presspahn Fibre Jointing components usually take the form of strips, washers, gaskets or pads all of which can be manufactured here using our state of the art conversion facilities. 

    Presspahn Fibre Jointing materials are produced using electrical grade kraft wood pulp, designed as a surface insulation material on cellulose for insulation class A and can withstand high heat exposure for short periods of time.  Presspahn materials are available in paper and board form, in a choice of different thicknesses.

    Why use Presspahn Fibre Jointing?

    With a raised awareness of environmental and health & safety issues, more care is taken when manufacturing electrical equipment and machinery and the components used within them.  Presspahn Fibre Jointing papers and boards are cut into parts such as gaskets for use as electrical barriers, restricting the free flow of current, protecting electrical conductors from coming into contact with tools and people during usage, repairs and installation .  

    Pressboard is just one of many Electrically Insulation materials supplied by ASG, often taken for its high chemical purity, mechanical strength and optimum oil impregnability.  These properties make pressboard perfect for us within oil-filled power transformers and distribution transformers as well as an insulation material for electric machines and capacitors

    Other Types of Fibre Jointing Materials available

    • Betaflex is a cellulose based fibre material, which is made using a nitrile binder giving it excellent tensile strength,  low compressibility, good elastic recovery and erosion resistance.   Betaflex is used widely in the industrial and automotive sectors due to its resistance to oils. petrols , diesel and even antifreeze.
    • Ceramic Fibre material is constructed using ceramic fibres and an organic binder, designed for extreme temperature applications reaching up to 1250℃.    Ceramic fibre roll materials have excellent strength and flexibility, excellent insulating properties and thermal resistance.
    • Gasket Paper has a high resistance to petrol, oil and water, therefore often utilised within automotive applications (within fuel/oil pumps and filters).  It is not recommended for industrial use due to its lack of resistance to chemicals and heat. 

    Benefits of using Presspahn Fibre Jointing

    • Can withstand high heat for short periods of time high
    • Utilised in 105ºC rated (Class A) electrical applications
    •  Excellent mechanical strength and absorption characteristics
    • Can be punched, folded and cut
    • Good machinability
    • Available in rigid board or flexible paper

    Advantages of Using Presspahn Fibre Jointing

    Presspahn fibre jointing components are highly utilised within transformer and other power transmission equipment offering an excellent insulating structure.  The material offers properties including resistance to ageing, insulation performance and mechanical properties and is available in a choice of rigid board and paper components. 

    Presspahn Fibre Jointing can be taken in full rolls or sheets of material for conversion at a later date, or alternatively sawn, routered and pressed into a range of products here onsite at Advanced Seals & Gaskets Ltd and supplied as cut parts such as pads, gaskets, washers and strips. 

    During the formulation of the raw material, the compound is treated through several non-chemical processes, ensuring maximum purity free from fillers and impurities allowing for the material to be used in even the more stringent applications. 

    Presspahn Fibre Jointing offers excellent mechanical strength and oil penetration therefore suitable for both dry and oil based transformers and other equipment and can be used across a range of currents and voltages.  Some of the applications in which Presspahn fibre jointing papers can be found include insulation within cables carrying electrical current or signals such as telephone cables, power cables, capacitors and even submarine power cables, whereas the presspahn fibre jointing boards are more often found as transformer boards in oil-filled transformers as an insulating structure.

    Have a Question about Presspahn Fibre Jointing ?

    Please contact us using the form below or by calling us on +44(0)1384 252555.