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Tufnol Sheet

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Tufnol 1P13
Direct Plastics - Tufnol 1P13
Tufnol Kite
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Tufnol Whale
Direct Plastics - Tufnol Whale

About Tufnol Sheet

 1)    Whale Grade; SRBF (Synthetic Resin Bonded Fabric)

Advantages of “Whale” Tufnol sheet
Whale Tufnol Sheet is a grade specifically designed for mechanical engineering purposes. It is constructed of medium weave cotton and phenolic resin laminated plastic material. This particular grade is dimensionally very stable and can be either run dry or lubricated with water, oils or grease. It has excellent general physical properties with high strength, good toughness, and wear resistance. This grade is suitable for wear resistant components such as bearings, bushes, spacers and low voltage applications.

Advantages of Whale Tufnol Sheet

    Very Rigid with high strength and low weight
    Good electrical and thermal insulation properties
    Non-corrosive; can reduce corrosion in metal parts
    Higher thermal expansion than many metals
    Withstands heavy loads with minimal creep
    Excellent weather resistance
    Good resistance to chemicals, oils, solvents and hydrocarbons


Disadvantages of Whale Tufnol Sheet

    Used for electrical insulation, but at low voltages only
    Maximum working temperature is only 120 to 130 degrees C
    When machined, it creates a fine yellow dust


How well does Whale  Tufnol Sheet perform?
Whale Tufnol sheet material is produced much like plywood and, as a result, is quite rigid – as much as twice that of nylon. In fact, it is the inherent rigidity of Whale Tufnol that diminishes creep. Picture two flanges, one of nylon and the other of Whale Tufnol, and bolted a lid down onto each. After applying about 50 ft. lbs. of torque to the bolts, the lid on the nylon flange would eventually loosen as the nylon creeps. The bolts on the other lid with the Whale Tufnol flange would stay roughly the same.

What is Whale Tufnol Sheet is used for?
This sheet is a most useful general purpose engineering plastic and is the most popular grade for a wide range of mechanical applications and general uses, such as gears, spacers, jigs and fixtures, wear resistant components, and low voltage insulation applications.

What not to use it for
Whale Tufnol sheet is not suitable for a high electrical insulation, circuit boards, and covers.

Machining characteristics
Unlike many plastics, Whale Tufnol Sheet cannot be melted to re-shape it. Finished components are made by machining using ordinary machine tools such as saws, drills, lathes, milling machines, or high-speed computer-controlled CNC machines. Whale sheet is easily machined to produce these finished components. One disadvantage when machining it is that it is quite dusty, and prolonged drilling may cause the material to melt and adhere to the drill bit. In addition, because of its plywood-like construction, more delicate machined components are subject to shearing along the lamination.

Gluing and bonding of Whale Tufnol Sheet
While the selection of adhesive is dependent on the material being used, Whale Tufnol can be bonded to a variety of materials.

Can i use it for food applications?
Tufnol should not be used in any food applications where it may come into direct contact with food products.

Is Whale Tufnol Sheet good for wear resistance?
This grade is the one that is well known for its very good wear resistance and toughness.

Chemical resistance
Whale Tufnol sheet also has good resistance to chemicals, oils, solvents and hydrocarbons, although concentrated acids and alkalis will attack laminates.

Unique characteristics
It is made primarily of cotton sheets and phenolic chemical resin. Pre-soaked and cured cotton sheets are layered over each other until the desired thickness is achieved. Afterwards, these are then strongly bonded together under high pressure in a hot press, being crushed essentially, with up to three tones of pressure and then cured. A finished sheet of 25mm, for example, will have begun its life at 40mm in thickness before undergoing the press!

Size range, colours, and availability
Tufnol Whale sheet is available in brown/tan colour and in thickness from 1mm up to 50mm. although our sales team are easily able to obtain you much thicker material. In addition to the Whale brand Tufnol sheet, we offer both the Kite brand and Tufnol’s 1P13 grade. Both types are available in thicknesses ranging from 1mm up to and including 25mm thickness.

Why should you choose this particular Engineering Plastic
This grade is an excellent thermal barrier material both to prevent extreme heat and extreme cold form transferring. It is hard, rigid, strong, and lightweight – being about 1/5 of the weight of steel and half the weight of aluminium. It is a good electrical insulator and is also resistant to long-term immersion in water. It is exceptionally resistant to weathering - much more so than most other plastics - and so has been used for components in outdoor and marine environments for many decades without corroding or degrading.

Why not choose this Engineering Plastic
A downside to the production process of Whale Tufnol sheet is that tolerances can vary quite a bit due to miscalculations on the number of sheets used, the actual thickness of individual sheets, and even variances in the pressure applied by the press or the in the steel press sheets. Therefore, it may not be suitable for applications requiring very minimal tolerances.

Summary for Whale Tufnol Sheet
Whale Tufnol sheet is a cotton fabric laminate made from medium weave cotton and phenolic resin laminated plastic. It is known as a Synthetic Resin Bonded Fabric, or SRBF. Whale Tufnol is a good, general-purpose medium weave grade for mechanical applications.  It has excellent all round strength, good toughness and wear resistance as well as thermal barrier properties. It is versatile, easy to work with, and displays outstanding rigidity.

2)    1P/13 Grade; – SRBP (Synthetic Resin Bonded Paper)

Advantages of 1P/13 Tufnol Sheet

    A very strong plastic & rigid plastic
    Lightweight
    Economical
    Reasonable low voltage insulation


Disadvantages of 1P/13 Tufnol Sheet

    Can chip if high impact
    Not for high voltage applications
    Low flame retardancy


What 1P/13 id used for
This grade is described as the “general purpose” grade, it often gets used for router jigs, fixtures, guides and some basic tooling

What its not used for
Not really for high wear applications or for high voltage electricity applications

Machining characteristics
1P/13 grade will machine up quite well with carbide cutter but will generate a fine yellow dust

The Gluing and bonding of 1P/13 Tufnol Sheet
This grade is easily bonded with many commercially available adhesives such as araldite, epoxies and contact adhesives

Food contact
IP/13 is not suitable for constant contact with food

Wear Resistance
This grade is more for general purpose use, it will stand being used as a router jig and will give a reasonable life but the Whale grade is certainly more designed for wear resistance

Chemical resistance
This grade also doesn’t have a very high resistance to chemicals or acids

Sizes
We stock thicknesses from 1mm up to 25mm

Summary for 1P/13 Tufnol Sheet
1P12 Grade Tufnol sheet is a low cost commercial paper based laminate, produced to meet the need for an economical material where electrical requirements are moderate. As a good basic, low voltage insulation material, this grade has a higher mechanical strength than the other grades in our phenolic paper range and greater impact strength. It can be machined readily and components can be hot punched in thicknesses up to 3.2mm. This material is great for many electrical components where low voltage insulation is required.  Its low cost and all round properties make it a good choice for many less demanding mechanical duties, such as spacers, base plates, side plates, and simple jigs and fixtures.

3)    Kite Grade Tufnol (Synthetic Resin Bonded Paper)

Advantages

    High voltage applications
    Lightweight
    Rigid & strong
    Economical


Disadvantages

    Can chip if high impact
    Low flame retardancy


What is Kite grade Tufnol Sheet is used for?
This grade is more suited to the higher voltage electrical insulation applications

What its not used for
Kite grade is not really suited to general purpose applications; it isn’t quite as strong as 1P/13 grade or Whale grade. Its also not suited to high wear applications.

Machining Characteristics
Kite grade will machine up quite well with carbide cutter but will generate a fine yellow dust

Gluing and bonding
This grade is easily bonded with many commercially available adhesives such as araldite, epoxies and contact adhesives

Food contact
IP/13 is not suitable for constant contact with food

Wear Resistance
This grade is more for general purpose use, it will stand being used as a router jig and will give a reasonable life but the Whale grade is certainly more designed for wear resistance

Chemical resistance
This grade also doesn’t have a very high resistance to chemicals or acids

Sizes
We stock thicknesses from 1mm up to 25mm

Summary for Kite Tufnol Sheet
Kite Tufnol sheet is a first class electrical insulating material with good dielectric strength and high insulation resistance.  It has low moisture absorption and good mechanical strength, but its impact strength is lower than that of most other grades of Tufnol. It machines easily and can be hot punched in thicknesses up to 3.2mm. It is used for a multitude of applications at low, medium and high voltages, such as terminal boards, mounting panels, tag strips, coil formers, insulating sleeves and bushes, busbar supports, tool and instrument handles, coil supports, insulated enclosures, brush holders, insulating spacers and special purpose plugs and sockets.
 

Technical Data for Tufnol Sheet

Tufnol Sheet Data Sheet
Data Sheet

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