About ALF

ALF™ is generally called Alumina Fibre. As the composite is 70% Alumina and 30% Silica, we name it Alumina Silica Fibre. The product/yarns are produced as a 7 micron diameter filament and are boron free. The 7 micron diameter allows superior flexibility compared to other available materials. Furthermore, because the fibre is boron-free, problems associated with the release of boron gas are not a factor. Performance and durability of Hiltex Alumina Silica Fibre is superior to other products presently available. ALF suffers almost no loss of mechanical strength at temperatures up to 1200º C and can be used for applications approaching 1395ºC.

Download our boron-free continuous alumina-silica fiber (ALF) brochure

ALF is available as woven cloth, braided sleeve, tape, rope, yarn and sewing yarn
and is appropriate for countless applications including the following:


  • Thermal insulation rings
  • Furnace linings
  • Heat-shielding curtains
  • Thermal insulation sealers or packing materials
  • Thermal insulation coverings for thermocouples, cables and wires
  • Roller covers for tempered glass plate manufacturing
  • Filters for molten metals
  • Spacers for heat treatment
 
  • Abrasives for plastic whetstones
  • Insulators around generator and aircraft/rocket engines
  • Catalyst carriers
  • Electrical and thermal insulators for diesel particulate filter (DPF) systems
  • Alumina-silica fibre reinforced plastics (FRP), insulation and structural materials for cryogenic apparat uses
  • Alumina-silica fibre reinforced metals (FRM)
  • Matrices for ceramic composites

alf cloth

  Type  Weave    Width         Weight      Thickness    Roll length 
3025 twill 100 cm 440 gr/m² 0.35 mm 30 mtr
1111 plain 100 cm 500 gr/m² 0.68 mm 30 mtr
0909 plain 100 cm 145 gr/m² 0.21 mm 30 mtr
2626 plain 100 cm 280 gr/m² 0.21 mm 30 mtr
2525 plain 100 cm 128 gr/m² 0.12 mm 30 mtr
4018 double twill 100 cm 940 gr/m² 0.80 mm 30 mtr

alf sewing thread

 Type    Diameter    Composite  Usage
5760 1.00 mm ALF sewing by hand
1280 0.30 mm ALF/Rayon  sewing by machine 
2560 0.53 mm ALF/Rayon sewing by machine
5120 0.76 mm ALF/Rayon sewing by machine

alf sleeve

Type  Internal diameter   Weight/mtr   Roll length 
SV1 1 mm 2.3 gram 50 mtr
SV2 2 mm 3.7 gram 50 mtr
SV6 6 mm 12 gram 25 mtr
SV12 12 mm 24 gram 25 mtr
SV20 20 mm 46 gram 25 mtr
SV40 40 mm 90 gram 25 mtr
SV60 60 mm 194 gram 25 mtr
 SV85  85 mm 340 gram 25 mtr
SV95 95 mm 380 gram 25 mtr

alf tape

 Type   Weave   Weight   Thickness   Roll length 
18S twill 830 gr/m² 0.60 mm 30 mtr
25S twill 440 gr/m² 0.32 mm 30 mtr
25D twill  1480 gr/m²  1.30 mm 30 mtr
50S twill 400 gr/m² 0.32 mm 30 mtr
50D plain 400 gr/m² 0.32 mm 30 mtr

alf yarn

Type/Tex  Diameter   Filament   TPM   Ply   Length/Package
67 0.3 mm 7 µm 90 2 2985 mtr
130 0.5 mm 7 µm 90 2 3070 mtr
200 0.6 mm 7 µm 90 3 2000 mtr
400 0.7 mm 7 µm 90 3 1000 mtr
600 1.0 mm 7 µm 170 3 666 mtr
 3700 (rope)  2.0 mm 7 µm 100 3 130 mtr