A Warp Knitting fabric that is formed by knitting a number of needles to form courses and loops horizontally across the width of the fabric. This technique is used to produce a wide range of fabrics including jersey, rib, purl, jacquard, and interlock fabrics. It is also being used to create a wide range of bio-textiles, including a polyester cardiac support device.
The Warp Knitting Process
The first step in the process of warp knitting is to manipulate the yarns to create courses and loops horizontally that build on top of each other (see picture). There are many different kinds of stitches in the fabric and the number of needles that are required for one yarn depends on the type of pattern.
Four Basic Stitches
The most common texture in knit fabric is the flat stockinette stitch. However, there are a variety of textures in other types of fabric including knit and purl stitches, garter stitch, ribbing, moss and seed stitches and small eyelet holes.
There are many different types of needles used in the warp knitting process and there is no limit to what pattern you can create with this technique. You can use a single or a double set of needles and you can vary the length of each set of needles to change the texture of the fabric.
When using a double set of needles, there are two rows of yarns in the same row and the needles in these rows are knit in a twisted pattern that is called the garter stitch. The result is a fabric with an intricate texture.
The next step in the warp knitting process is to move the needles up and down to create a vertical line of stitches that extends horizontally from the front to the back of the fabric. Once this line of stitches is created, there are now only a few needles left in the row and the fabric is formed.
It is also important to understand that the bobbins are moved by the rack-and-pinion gearing. This movement can be one or both sides of the machine and can also be done by hand if the operator can't get it done with a single set of needles.
This can be an effective way of creating a fabric with an unusual texture without using too much yarn. This is especially useful when you are trying to make a fabric with a very complicated design.
Several Variations in Ornamental Fabric
The first variation in the ornamental fabric of the present invention is characterized by having solid color pattern areas which are formed of independently knit wrap yarns C and D. The rest pattern area 50 is formed of the wrap yarn C which extends down and around the left side of the ornamental area 51 while the second pattern area 51 is formed of the wrap yarn D which extends down and around the right side of the ornamental area 51.