Shenzhen Wuge Industrial Co., Ltd

Nickel titanium monofilament fiber is an ultrafine metal wire made of nickel titanium alloy (such as nickel titanium nitride), which combines metal strength and fiber flexibility. Its core advantages lie in shape memory effect and superelasticity. Here is the key information extraction:

core features

1. Shape memory

It can deform at low temperatures and return to its predetermined shape when heated to a specific temperature (such as body temperature of 37 ℃), originating from the internal martensitic austenite transformation.

Example: After being compressed outside the body, the vascular stent automatically unfolds inside the body.

2. Super elasticity

It can withstand up to 8% deformation and fully recover, far exceeding ordinary metals (only 0.2%).

Example: Orthodontic archwires provide long-lasting and gentle orthodontic force in the oral cavity.

3. Biocompatibility

A titanium oxide layer is formed on the surface to prevent the release of nickel ions, making it suitable for long-term implantation of devices such as heart stents.

Typical applications

1. Medical field (accounting for over 60% of the market)

Cardiovascular: Self expanding stents, vascular occlusion devices.

Orthopedics/Dentistry: Spinal fixation rods, orthodontic archwires.

Other: Urethral stent, stone retrieval basket.

2. High tech field

Aerospace: deformable wings (such as Japanese DS-STG alloy), satellite antennas.

Consumer electronics: foldable phone antenna, smart toy driver components.

3. Daily necessities

Super elastic eyeglass frame, temperature control sensor, and dynamic components for handicrafts.

Manufacturing and Challenges

Process: Vacuum melting → Cold drawing to micrometer level (e.g. 0.025mm) → Heat treatment to optimize performance → Surface treatment (electrolytic polishing/coating).

Difficulty: High processing cost (domestic price about 150-210 yuan/kg), requiring precise control of phase transition temperature.

Trend: Develop new alloys with a wider temperature resistance range (such as DS-STG), nanocomposite fibers, and 3D printing technology.

Data and Cases

More than 10 million nickel titanium stents are implanted globally annually, accounting for 70% of the stent market.

Chinese companies are breaking the monopoly of foreign medical nickel titanium wire.

The Shenzhen toy industry consumes over 500 tons of nickel titanium drive wires annually.

Nickel titanium monofilament fiber, with its "smart material" characteristics, continues to drive innovation in fields such as healthcare and aerospace. In the future, with technological breakthroughs, its application scenarios will further expand.