Textile Forming Technology

knit fiber strings on machine

We work closely with each client to determine the most appropriate component geometry based on product performance requirements. Employing materials engineering technology, we can design a range of properties into a biomedical structure, including pore size, thickness, elongation, flexibility and stiffness.

Weaving

The interlacing of yarns and/or wires over and under each other, oriented at 90-degree angles, to create a stable material structure. This method offers the most design flexibility of all forming techniques. Weaving also enables seamless tubes to be formed with tapering along the length to produce near net-shape geometries.

closeup of woven window

Key characteristics: Strength, dimensional stability, low porosity

Weaving applications include vascular plugs, vascular grafts, ligament and tendon reconstruction, tissue scaffolds, and soft tissue stabilization

 

closeup of medical knit material

Key characteristics: Stretch/controlled elongation, conformability, bulk, lightweight, controlled pore size

Knitting

A construction made by interlocking a series of loops of one or more yarns. Common knitting methods include warp knitting and weft knitting. Warp knitting creates versatile geometric structures that exhibit controlled elasticity in both directions within limits and dimensional stability. Weft knitting enables biomedical structures that have controlled thickness (using a wide variety of materials), consistent pore size and shape, and excellent elongation and recovery.

 

Knitted applications include surgical meshes, adhesion barriers, abdominal wall repair, and cranial facial repair

Braiding

The intertwining of three or more yarns (using one or more materials) in a diagonally overlapping pattern. Braids can be formed over mandrels of varying shapes to produce near-net shape structures. The process provides unrivalled variability of process parameters, yielding differing physical and mechanical properties. Braiding enables any number or combination of yarns or wires from 3 to 192 ends.

 closeup of white esophageal tube

Key characteristics: High radial expansion and strength, flexibility, controlled porosity

Braided applications include sutures, stents, and tendon and ligament fixation

 

More details about our forming technology methods are available in the Secant Medical Components glossary.