Three-layer composite tubing that builds torque, pressure resistance and support from a metal braid or spring coil between two layers. Braid, coil and steerable sheath — 3 items.
All three are liner, reinforcement and jacket. What differs is the middle — a braid, a coil, or a braid plus puller wires for steering.
Co-extrusion or reflow places a metal or fibre braid between two layers. Burst pressure, column strength and torque transmission all rise. Braid angle, coverage and wire size decide performance.
A spring coil between two layers raises pressure resistance, kink resistance and torque control together. The surface is smooth and the support resists crushing.
A steerable sheath bent from outside the body to different distal angles. The braid holds torque and resists kinking; the PTFE liner eases instrument passage.
What separates the three is the Reinforcement. Braid for torque, coil for crush resistance, steerable when the tip has to bend.
Reinforced tubing usually ships as a subassembly. Bundling tip forming, marker bands, bonding and hub assembly in one place removes an inspection step.
Braid if torque has to reach the tip; coil if the lumen must survive compression. Both can go in the same tube.
Braid runs ± 0.0127 – ± 0.0254 mm, coil ± 0.03 – ± 0.15 mm. Braid holds tighter.
Yes. Hardness is stepped by zone — softer distal, stiffer proximal.
A PTFE liner is the common choice. PI, PE, PEBAX, PA, TPU and PEEK also work; PTFE is etched so it bonds.
Uni-, bi- and quad-directional, bending up to 270°. Sixteen sizes are published.
Inner and outer layers are made separately and combined, which keeps lead times short for reinforced tubing. Send quantity and specs for a firm schedule.
Dimensions, material stack, application. Those three are enough to start. Anything not in the published material we check with the plant and report back.
