A 3D Shape that Expands Material Possibilities Multi-Dimensionally
“AMTETRA” is a needle-like, single-crystal zinc oxide produced through a revolutionary manufacturing process that involves the oxidative heat treatment of high-purity zinc in a specialized atmosphere.
Its most defining feature is its unique tetrapod (three-dimensional) shape.
It exhibits synergistic effects that cannot be achieved with conventional spherical or plate-like fillers. As a “specialty functional filler” that dramatically enhances the performance of resins and rubbers, it has been widely adopted across numerous cutting-edge industries.
5 Key Functions of AMTETRA
By adding AMTETRA, the following outstanding properties can be imparted to the matrix (resin or rubber).
1. Mitigation of Anisotropy and Reduction of Warpage
Mechanism: When used in combination with carbon fibers or glass fibers, the 3D shape of AMTETRA disrupts the fiber orientation.
Effect: It mitigates shrinkage anisotropy and drastically reduces the warpage and twisting of molded products. This significantly improves the dimensional accuracy of precision-molded components.
2. Improvement of Surface Smoothness
Mechanism: During the molding process, AMTETRA gathers at the surface (skin layer), effectively pushing the fiber fillers down into the core layer.
Effect: It suppresses fiber protrusion, achieving a beautifully smooth surface finish.
3. Enhancement of Wear Resistance and Sliding Properties
Mechanism: The single-crystal structure provides a strong micro-reinforcement effect.
Effect: It significantly minimizes the wear of resins and rubbers, reduces the coefficient of friction, and mitigates damage (aggressiveness) to mating materials.
4. Efficient Thermal and Electrical Conductivity (Bridging Effect)
Mechanism: The 3D “legs” of the tetrapod form pathways, acting as bridges that connect other filler particles.
Effect: It efficiently dissipates heat and static electricity, enhancing thermal conductivity and antistatic functions even with a small addition amount.
5. Improvement of Braking Performance and Grip
Effect: It micro-reinforces rubber materials, delivering outstanding grip force at the contact surface with roads or floors. It is highly regarded for demanding applications such as studless winter tires and the soles of sports shoes.
AMTETRA Product Lineup (Grade List)
| Grade | Average Fiber Length | Surface Treatment | Recommended Matrix (Proven Applications) |
|---|---|---|---|
| WZ-0501 WZ-0501L |
10 μm 20 μm |
None | PTFE, Rubber, Filter paper |
| WZ-0511 WZ-0511L |
10 μm 20 μm |
Aminosilane-based | PP, PE, PS, ABS, PMMA, PA, PPS, PES, LCP, PEEK, Epoxy, Phenol, Urethane, Coatings |
| WZ-0531 | 10 μm | Epoxysilane-based | POM, PET, PBT, LCP |
| WZ-05E1 | 10 μm | Silicone oil | PC |
| WZ-05B1 | 10 μm | Titanate-based | Coatings (Epoxy), POM |
| WZ-05F1 | 10 μm | Aminosilane-based (Improved dispersibility) |
PE film, LCP |
AMTETRA Basic Properties
- Chemical Formula: ZnO
- True Specific Gravity: 5.78
- Sublimation Point: 1720°C
- Thermal Conductivity: 25.3 W/m·K
- Crystal Structure: Hexagonal wurtzite structure (needle-like portions)
Application Examples of AMTETRA
| Category | Specific Application Examples |
|---|---|
| Automobiles and Tires | Fuel-efficient tires, brake-related components, fuel pumps, seal rings |
| Electronic and Precision Components | Connectors, audio head holders, oil seals, OA rolls |
| Sports and Leisure | Golf balls, golf club grips, shoe soles, high-performance gloves |
| Chemicals and Industrial Materials | Mold corrosion inhibition for PPS resin, electromagnetic wave absorbers, super-hydrophobic paints and coatings, special filter paper |
| Cosmetics and Daily Necessities | Foundation (pore-covering powder), UV absorbers, antibacterial and anti-algae materials |