Unlike most of the “conventional” fabrics, which although being three-dimensional have a negligible thickness compared to the other two dimensions (length, width), 3D Spacer knitted fabrics are characterized by considerable thickness. Knitted 3D spacer fabrics consist of two layers which are connected by an intermediate filament layer. The two fabrics are not separate but are produced simultaneously and are connected to the yarn system that lies between them. Typically the bonding layer is made from monofilament yarns (polyester, polyamide, etc.) and the fabrics are made of multifilament yarns.
The method of fabric production allows customization of all the structural characteristics of the fabrics. The structural features include the yarn count of the yarns used, the knitting pattern of the top and bottom fabrics, the density of fabrics (number of stitches per unit length), the angle and the density of the pieces of monofilament yarns and the thickness of the spacerfabric. The thickness of the fabric can reach 60mm.
Altering the structural characteristics allows development of Spacer fabric structures with specific properties. Regarding the properties of Spacer fabrics, it should be noted that one of the reasons for their development was the attempt to replace the toxic coated foams with a single fabric made from synthetic fibers, thus facilitating recycling. Spacer fabrics are used in various fields such as the automotive industry, technical applications, sports clothing, personal protective equipment, footwear, lingerie and medical applications.