Blanket
MLS 96 kg/m³ · 6 / 12.5 / 25 mm · 610 mm wide
Refractory · Category 01
MAFTEC
™ MLS Blanket
Polycrystalline mullite ceramic fibre.
The most advanced cladding and module solution for CGL, CAL and rolling-mill furnaces up to 1,600 °C.
The most advanced cladding and module solution for CGL, CAL and rolling-mill furnaces up to 1,600 °C.
Made from pure mullite (Al₂O₃ : SiO₂ = 72 : 28, Al₂O₃ + SiO₂ ≥ 99.9 % by ICP-AES). Shrinkage < 1 % at 1,400 °C × 24 h, practically no shot, practically no WHO fibres — the result: less damage to steel sheets, more stable production, longer campaign life.
Section · furnace wall
1:20 · Schema
Operating temperature
up to 1,600 °C
Al₂O₃ : SiO₂
72 : 28
Shrinkage 1,400 °C × 24 h
≤ 1 %
Shot content ≥ 45 µm
0 – 2 %
● In stock Erl · 24 h AT
01 · What MAFTEC is
Polycrystalline.
Polycrystalline.
Not RCF.
Classic refractory ceramic fibres (RCF) shrink significantly in continuous operation — because they are amorphous and re-crystallise under heat.
MAFTEC is already crystalline. What is not amorphous cannot re-crystallise. The result: dimensionally stable — for years.
01
Pure mullite
3 Al₂O₃ · 2 SiO₂ — polycrystalline, not amorphous like classic RCF. Stable mullite structure up to 1,600 °C, no phase change below 1,595 °C (Al₂O₃–SiO₂ eutectic).
02
No boron binder
Unlike alumina fabrics, no boron evaporates from MAFTEC. No embrittlement, no deposits on cooling sections.
03
Nonwoven
Fleece structure instead of weave — retains shape and spring-back even without sizing agents.
Phase diagram Al₂O₃ – SiO₂
MAFTEC sits in the green field — pure mullite.
At 70–74 % Al₂O₃ the fibre reaches the composition of pure mullite. Other alumina and ceramic fibres sit in mixed phases — under heat, mullite + cristobalite or corundum + mullite appear simultaneously. This is the fundamental reason for RCF shrinkage.
Schematic · equilibrium phase diagram Al₂O₃ – SiO₂
02 · Performance comparison
Where MAFTEC beats
Where MAFTEC beats
the alumina competition.
Measured against MAFTEC MLS 96 kg/m³ 25 mm, directly compared with three anonymised alumina-fibre competitors. Source: Mitsubishi Chemical, internal test series 2023.
Property
MAFTEC MLS
Competitor 1
Competitor 2
Competitor 3
Shrinkage 1,400 °C × 24 h
≤ 1 %
0.6 %
1.4 %
0.8 %
Shot content ≥ 45 µm
0 – 2 %
6.62 %
1.2 %
N/A
Ø Fibre diameter
5 – 7 µm
4.8 µm
4.0 µm
2.6 µm
WHO fibre fraction (< 3 µm)
practically 0 %
19 %
N/A
66 %
Max. operating temperature
1,600 °C
1,400 °C
1,400 °C
1,260 °C
Shrinkage at 1,400 °C — endurance test
MAFTEC remains dimensionally stable.
Shot content (particles ≥ 45 µm)
Clearly below competition.
MAFTEC
0 – 2 %
Wettbewerber 1
6.62 %
Wettbewerber 2
1.2 %
RCF typ.
4.5 %
Shot particles scratch thin steel sheets and fall into the product as contamination.
03 · Product forms
Real product photography.
MAFTEC ships in four construction forms. Blanket and Bulk shown here — Module, Board and Felt photos follow.
BLK
Bulk
Loose polycrystalline fibre — filling, shaping, reinforcement
Photo pending
MOD
Module
160 – 190 kg/m³ · 150 / 200 / 300 mm — photo pending
Photo pending
FLT
Felt
20 – 50 kg/m³ · 6 / 10 / 15 mm — photo pending
Photos: MAFTEC blanket render (SENN Gruppe · product archive) · bulk from MAFTEC Co. catalogue (Mitsubishi Chemical, 2022). MAFTEC™ is a registered trademark of Mitsubishi Chemical Corporation.
03 · Applications
Where MAFTEC runs at our customers.
01
up to 1,200 °C
Hot-dip galvanizing lines
CGL · Continuous Galvanizing Line
Low emissivity reduces heat radiation on the steel strips. MAFTEC cladding replaces old fibre-mat systems — faster temperature changes possible.
02
up to 1,150 °C
Annealing lines
CAL · Continuous Annealing Line
Direct-fired zones: MAFTEC modules as burner-proximity refractory. Practically no WHO fibres — clearable under REACH and TRGS.
03
up to 1,600 °C
Steel · aluminium · non-ferrous
Rolling & annealing furnaces
Walking-beam and pusher furnaces. Full lining as MAFTEC blanket layer or as module. Campaign-life extension vs chamotte typically 3–5×.
04 · Construction forms
One fibre. Four assemblies.
MAFTEC delivers the same fibre quality in four constructions — we help choose the right one by furnace type, temperature and installation.
BLK
Blanket
Density
96 / 128 kg/m³
Thickness
6 / 12.5 / 25 mm
Flexible lining, repairs, zone replacements
MOD
Module
Density
160 – 190 kg/m³
Thickness
150 / 200 / 300 mm
High-temperature zones, direct burner proximity
BRD
Board
Density
280 – 360 kg/m³
Thickness
25 / 50 mm
Structural walls, covers, door lining
FLT
Felt
Density
20 – 50 kg/m³
Thickness
6 / 10 / 15 mm
Seals, back-up layer, expansion joints
05 · Workplace safety & compliance
Not respirable.
Not respirable.
That is measurable.
MAFTEC produces practically no WHO fibres (fibre diameter < 3 µm, length > 5 µm, ratio ≥ 3:1). The fibre is therefore not classified as CMR — unlike classic RCF/AES fibre under TRGS 619.
Fibre-diameter distribution
5 – 7 µm
Ø diameter MAFTEC
practically 0 %
WHO-fibre fraction
> 3 µm
practically all fibres
REACH-compliant
No SVHC substances. Documented safety data sheet DE/EN/FR is included with every delivery.
TRGS 619 / 521
MAFTEC is not a "biopersistent fibre" under TRGS. No protective-group requirement, no CMR classification needed.
06 · What SENN adds
We do not just sell the mat.
01
Technical engineering
Cladding design based on furnace geometry. Thickness, density, layer build-up — in coordination with your refractory engineer.
Reaction
24 – 72 h
02
Installation supervision
On-site briefing of your installation team — or full execution by our partner (DE / AT / CH / IT).
Reaction
from 1 day
03
Stock holding
Standard rolls and modules in stock Erl (Tyrol) and Nuremberg. Production-near positioning.
Reaction
24 h AT · 72 h EU
04
Training & safety
TRGS and REACH briefing for your maintenance team. Protective-clothing package optional.
Reaction
included
Next step
Which furnace is up?
Send us the furnace type, operating temperature and desired campaign interval — we respond on working days with a design proposal and quote.
Or directly by email: info@senn-gruppe.com
What we need from you
●
Furnace type
Walking-beam, pusher, CGL, CAL, annealing, heating furnaces
●
Max. operating temperature
°C — including peak spikes
●
Zone geometry
Drawing / sketch is enough
●
Target campaign life
Years or campaign duration
●
Existing lining
Material + build-up, if known
MAFTEC™ is a registered trademark of Mitsubishi Chemical Corporation. SENN Gruppe is an authorised distributor for Austria, Germany and the EU. Product properties per MAFTEC™ datasheet (MAFTEC Co., Ltd., Mar. 2022, No. EN20220301-A) · comparison values per Mitsubishi Chemical internal test series 2023.