Product Information Sheet
Isofraxâ„? 1260C Paper
Introduction
Isofraxâ„? 1260C Paper is a unique product which is manufac-
tured by forming Isofrax 1260C Fibre in a nonwoven matrix.
The fibres are randomly oriented during manufacture, then
held in place with a latex binder system. A specialized,
statistically controlled paper-making process is utilized to
form uniform, lightweight, flexible materials, including Isofrax
1260C Paper.
Isofrax 1260C Fibre, the fibre utilized in Isofrax 1260C
Paper, is a revolutionary new fibre that utilizes a unique,
patented silica-magnesia chemistry to solve a variety of
demanding, high-temperature application problems. Isofrax
1260C Fibre is the product of a long-term research and devel-
opment effort by Unifrax to produce a fibre which has the high
temperature performance characteristics required in many
applications at temperatures up to 1260°C/2300°F and also
meets European regulatory requirements (Directive
97/69/EC).
Isofrax 1260C Paper exhibits excellent chemical stability and
Applications
resistance to attack from most corrosive agents. Exceptions
Isofrax 1260C Paper is used in many different applications,
include hydrofluoric acid, phosphoric acid and strong alkalis.
which include:
Isofrax 1260C Paper also provides superior wetting resistance
� Automotive and aerospace heat shields
to molten aluminum alloys at high temperatures.
� Gaskets for ovens, stoves, heaters and other appliances
Isofrax 1260C Paper will generate small amounts of smoke
� Highly efficient refractory backup insulation in ladles, glass
and trace element outgassing during initial exposure to temper-
tanks and other high-temperature furnaces
atures above 230°C (446°F).
� Automotive muffler insulation
Isofrax 1260C Paper Advantages � Insulating wrap for shrouds/stopper rods in steel
manufacturing
Isofrax 1260C Paper offers many unique problem-solving
� Investment casting mold wrap
advantages which include:
� Thermocouple tube protection
� High-temperature stability (see Table 1)
� Low thermal conductivity
� Meets European regulatory requirements
� Flexibility
Thermal Shrinkage
� Easy to wrap, shape, or cut
� Margin of safety (3mm (1/8z), Isofrax 1260C Paper)
Typical Product Properties 10
Colour White
Melting Point >1500°C (2730°F) 8
% Linear Shrinkage (24 hours)
Temperature Grade 1260°C (2300°F)
Recommended Operating Temperature1 1175°C (2147°F) 6
Average Tensile Strength 385 kPa (55 psi) Isofraxâ„?
Compression % Deformation
4
11 kPa (2 psi) 10%
32 kPa (5 psi) 25%
2
175 kPa (25 psi) 50%
Note: 0
900 1175
300 600 1110
(1) The recommended operating temperature is determined
Temperature (°C)
by irreversible linear change criteria, not melting point.
TABLE 1. Thermal stability of Isofrax 1260C Paper.
Typical Product Parameters
160 kg/m3 (10 pcf)
Density
70% Wt(2)
Fibre Index
LOI (including binder) 7 to 10% Wt
Thickness (mm) 1, 2, 3, 6 (0.04z, 0.08z, 0.12z, 0.24z)
Width (mm) 610, 1220 (24z, 48z)
Note:
For additional information about product performance or to
(2) Fibre index is measured using the conical elutriation
identify the recommended product for your application, please
method.
contact the Unifrax Application Engineering Group at
716-278-3899.
Data shown are average results of tests conducted under
standard procedures and are subject to variation. Results
should not be used for specification purposes.
Insulating Value
The following table summarizes the insulating character-
istics of Isofrax 1260C Paper. All heat flow calculations are
based on a surface emmissivity factor of 0.90, an ambient
temperature of 27°C (80°F) and zero km/h (mph) wind velocity,
unless otherwise stated.
Insulation Thickness 3mm (0.12z) 6mm (0.24z)
Hot Face Cold Face (°C/°F) (°C/°F)
650°C (1202°F) (377/711) (296/565)
900°C (1652°F) (513/956) (408/766)
1175°C (2147°F) (659/1218) (530/985)
Isofrax 1260C Paper can be used in conjunction with hard
refractory materials to improve the insulating value and reduce
heat loss of the lining system. The following table shows a
typical application using 230 mm (9z) of Super Duty Firebrick
as the hot face with Isofrax 1260C Paper as backup insulation.
Insulation Thickness 3mm (0.12z) 6mm (0.24z)
Hot Face Cold Face (°C/°F) (°C/°F)
650°C (1202°F) (163/325) (150/302)
900°C (1652°F) (205/401) (190/375)
1175°C (2147°F) (248/478) (233/451)
Health and Safety Information
Isofrax Thermal Insulation from Unifrax Corporation, accord- Insulation does not require additional labeling or further
ing to Directive 97/69/EC, possesses a fibre chemistry within testing. In addition, Intratracheal Instillation Biopersistance
the regulatory definition of a “man-made vitreous (silicate) Testing per the German Hazardous Substance Ordinance
fibre with random orientation with alkaline oxide and alkaline has been conducted on Isofrax fibres with results that are
earth oxide content greater than 18% by weight.� Isofrax below German regulatory thresholds. Refer to the product
fibres have been tested pursuant to EU protocol ECB/TM/26, Material Safety Data Sheet (MSDS) for recommended work
Revision 7, Nota Q, Directive 97/69/EC, with results that practices and other product safety information.
are below regulatory thresholds. As a result, Isofrax Thermal
Form C-1457 English Unifrax Corporation Unifrax GmbH
Effective 8/00
Corporate Headquarters Hanns-Martin-Schleyer-Str. 30
© 2000, Unifrax Corporation
All Rights Reserved 2351 Whirlpool Street 47877 Willich, Germany
Printed in USA
Niagara Falls, New York 14305-2413 Telephone: 49-2154-94780
Page 2 of 2
Telephone: 716-278-3800 Telefax: 49-2154-947810
Data shown are average results of tests conducted under standard procedures and are
subject to variation. Results should not be used for specification purposes. Telefax: 716-278-3900 Internet: www.unifrax.com
The following is a trademark of Unifrax Corporation: Isofraxâ„? Thermal Insulation.
Internet: www.unifrax.com Email: info@unifrax.com
Email: info@unifrax.com
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