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TUFNOL Rolled Laminated Paper Tubes 

Phenolic Paper laminate 

Paper/phenolic resin rolled laminated plastic tubes

(SRBP - Synthetic Resin Bonded Paper)


The TUFNOL range of rolled laminated paper tubes have been developed to complement the range of moulded tubes.  RL tubes have good mechanical strength, low water absorption and are resistant to weathering and to chemical attack by mild acids and alkalis. They are used where electrical insulation is required and in many instances where the requirement is simply for a low cost, strong and rigid non-metallic tube.

Three grades are available:

Grade RL P/1 – A low cost commercial quality grade, suitable for low voltage electrical applications and some mechanical uses.

Grade RL P/2 – A good electrical insulator with good dielectric properties.  Made to BS EN 61212 Type PF CP 23.

Grade RL P/3 – Superior mechanical properties to Grade RL P/1, particularly with regard to its higher bursting strength.  Machines well.

 

What are TUFNOL RL paper tubes used for?

In general, Grade RL P/2 is used primarily for electrical insulation components such as bobbins, coil formers, insulating spacers and sleeving.  The other grades are used for low voltage insulation and for low cost mechanical applications, such as handles on welding guns, structural components and containers for pyrotechnics, and similar items. 

TYPES AVAILABLE

 

Tubes

 

Grade RL P/1     – natural colour

Yes

Grade RL P/2     – natural colour

                        – black

Yes

Yes

Grade RL P/3     – natural colour

Yes

*Minimum order quantities may apply.



SPECIFICATIONS for TUFNOL Rolled Paper Tubes


BRITISH STANDARDS

Current Standards

Recent Standards

(now obsolete)

Grade RL P/1 tube

BS EN 61212-3-1 Type PF CP 22

-

Grade RL P/2 tube

BS EN 61212-3-1 Type PF CP 23 & 24

BS 6128 Part 8 Type PF CP 81 & 82

Grade RL P/3 tube

BS EN 61212-3-1 Type PF CP 21

-



PHYSICAL PROPERTIES

TUFNOL RL Paper Tubes


PROPERTY

Grade RL P/1

TYPICAL RESULT

Grade RL P/2

TYPICAL RESULT

Grade RL P/3

TYPICAL RESULT

 

UNITS

Axial compressive strength

90

160

90

MPa

Cohesion between layers

120

180

150

MPa

Water absorption

4.0

1.5

4.0

mg/cm2

Insulation resistance after immersion in water

5x106

2 x108

2 x106

ohms

Loss tangent at 1 MHz

-

0.03

-

-

Permittivity at 1MHz

-

4.3

-

-

Axial electric strength in oil at 90ºC

-

4.5

-

kV

Electric strength normal to axis in oil at 90ºC

 

 

 

 

- 1.6mm wall

-

11

-

MV/m

- 3.0mm wall

-

9

-

MV/m

Relative density

1.21

1.27

1.21

-

Maximum working temperature**

 

 

 

 

- continuous

90

90

90

ºC

- intermittent

120

120

120

ºC

Thermal classification

Class E

Class E

Class E

-

Test methods as BS EN 61212-2, where applicable.


**Users of highly stressed components at temperatures approaching the maximum are recommended to seek further advice from Tufnol Composites Ltd.

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