NITIVY
NIVITY Chopped Fiber
Heat-Resistant Fiber
NITIVY ALF™ is a continuous alumina fiber that was developed based on our vinylon (PVA fiber) dry spinning technology.
The yarn, which is made of bundles of filaments formed from fine crystal grains, is highly flexible and processable into various products such as fabrics and sleevings without the aid of other fibers.
NITIVY ALF™ has a wide range of applications thanks to its excellent thermal resistance, high strength and modulus, and electrical insulation properties.
Characteristics of NITIVY ALF™
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| Standard grade | High heat-resistant grade |
Applications of NITIVY ALF™
- Furnace linings
- Heat-shielding curtains
- Roller covers for toughened glass operation
- Spacers for the heat treatment of metal or other materials
- Thermal insulation coverings for the thermocouples, cables and wires
- Ceramic Matrix Composites (CMCs)
- Thermal insulation seals or packing materials
- Insulators around generators or aircraft/rocket engines
- Cryogenic insulation
- Abrasives for plastic whetstones
- Thermal insulation rings (disks and collars) for semiconductor diffusion furnaces
- Others
Properties
| Item | Type | Standard grade | High heat-resistant grade |
|---|---|---|---|
| Color | White | Cherry blossom | |
| Appearance | Continuous | Continuous | |
| Filament diameter(μｍ) | 7 | 10 | |
| Chemical composition(％) | Al2O3 | 72 | 70 |
| SiO2 | 28 | 28 | |
| B2O3 | ー | 2 | |
| Density(g/cm3) | 2.9 | 3.0 | |
| Crystal phase | γ-Al2O3 | γ-Al2O3 | |
| Maximum use temperature(℃) | 1,250 | 1,400 | |
| Melting point(℃) | ＞1,850 | ＞1,800 | |
| Bending Resistance Comparison of Filament Diameter | Strength Retention After Exposure to High Temperatures |
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Chopped Fiber (Standard grade)
About Chopped Fiber
NITIVY ALF™ Chopped fibers are made from NITIVY ALF™ fibers that offer excellent thermal resistance, electrical insulation properties and good chemical resistance.
NITIVY ALF™ Chopped fibers can be used in combination with ceramics, metals, plastics, etc. as a reinforcement to improve mechanical properties and thermal shock resistance.
The fibers can be chopped to 0.1mm-60mm upon customer request.
NITIVY ALF™ Chopped fibers are chopped from NITIVY ALF™ continuous fiber so they have a uniform filament diameter, small variance in chopped lengths and are completely free from non-fiber particles.
Please feel free to contact us if you have any requests or inquiries.
Typical Properties of Chopped Fiber
| Item | Value |
|---|---|
| Chemical composition(％) | Al2O3 : SiO2 = 72 : 28 |
| Filament diameter(μm) | 7 |
| Filament length(mm) | 0.1～60 |
| Density(g/cm3) | 2.9 |
| Crystal phase | γ-Al2O3 |
The above are typical values only.
