Warp knitting

Tricot is very common in lingerie and underwear. The right side of the fabric has fine lengthwise ribs while the reverse has crosswise ribs.[6] The properties of these fabrics include having a soft and 'drapey' texture with some lengthwise stretch and almost no crosswise stretch.[6] Tricot machines are produced with 2, 3, or 4 guide bars.[7]

Tricot machines have a vast application, such as elastic and non-elastic mesh fabric, velvet fabric, and others.[8]

Tricot machine generally uses E28, E32, E36, and E40. At present, the widest working width of tricot machine has reached 335 inches. [9]

Towel warp knitting machine TS4C for microfiber towel fabrics.

The Terry Warp Knitting Machine holds significant prominence in the production of microfiber terry towels, specifically intended for cleaning purposes. Additionally, the Changzhou A-ZEN terry towel machines, namely the TS4C[11] and TS4C-EL[12] models, demonstrate versatile applicability by accommodating the manufacturing of cotton towels as well. Evidently, the demand for cotton towel knitting machines has been steadily escalating, prompting increased interest from customers.

In contrast to conventional loom terry machines, the microfiber terry towel machine exhibits significantly augmented productivity, while concurrently boasting a more environmentally sustainable and resource-efficient manufacturing process

In addition, the Superpol Towel Machine also belongs to tricot machines.

Milanese is stronger, more stable, smoother and more expensive than tricot and, hence, is used in better lingerie. These knit fabrics are made from two sets of yarn knitted diagonally, which results in the face fabric having a fine vertical rib and the reverse having a diagonal structure, and results in these fabrics being lightweight, smooth, and run-resistant.[6] Milanese is now virtually obsolete.

Drawing of an old Raschel machine

In 1855, Redgate combined the principles of a circular loom with those of warp knit. A German firm used this machine to produce "Raschel" shawls, named after the French actress Élisabeth Félice Rachel. In 1859 Wilhelm Barfuss improved the machine to create the Raschel machines.[13] The Jacquard apparatus was adapted to it in the 1870s. The Raschel machine could work at higher speeds than the Leavers machine and proved the most adaptable to the new synthetic fibres, such as nylon and polyester, in the 1950s. Most contemporary machine-made lace is made on Raschel machines.[14]

Raschel knits do not stretch significantly and are often bulky; consequently, they are often used as an unlined material for coats, jackets, straight skirts and dresses. These fabrics can be made out of conventional or novelty yarns which allows for interesting textures and designs to be created.[6] The qualities of these fabrics range from "dense and compact to open and lofty [and] can be either stable or stretchy, and single-faced or reversible.[6] The largest outlet for the Raschel warp knitting machine is for lace fabric and trimmings. Raschel knitting is also used in outdoors and military fabrics for products such as backpacks. It is used to provide a ventilated mesh next to the user's body (covering padding) or mesh pockets and pouches to facilitate visibility of the contents (MIL-C-8061).

Raschel machines include raschel lace machines, double-needle bar raschel machines,[15] raschel jacquard machines,[16] and high-speed raschel machines.

Stages in creating the loop

• 
  Golden lace
• 
  Lace appliqué
• 
  Raschel lace

Stitch-bonding is a special form of warp knitting[17] and is commonly used for the production of composite materials and technical textiles.

Stitch-bonding machines are used for the sewing processing of nonwoven fabric, to increase its fastness and toughness. The Stitch-bonding warp knitting machine or Non-woven warp knitting machine is for producing technical textiles such as shoe interlining, shopping bag, geotextile dewatering bags, reinforced composite glass fiber textile and other fabrics*[https://www.azentex.com/Stitch-bonding-machines.html].

As a method of production, stitch-bonding is efficient, and is one of the most modern ways to create reinforced textiles and composite materials [18] for industrial use. The advantages of the stitch-bonding process include its high productivity rate and the scope it offers for functional design of textiles, such as fiber-reinforced plastics.[18] Stitch-bonding involves layers of threads and fabric being joined together with a knitting thread, which creates a layered structure called a multi-ply.[19]

This is created through a warp-knitting thread system, which is fixed on the reverse side of the fabric with a sinker loop, and a weft thread layer.[18] A needle with the warp thread passes through the material, which requires the warp and knitting threads to be moving both parallel and perpendicular to the vertical/warp direction of the stitch-bonding machine.[19] Stitch-bonded fabrics are currently being used in such fields as wind energy generation and aviation.[18] Research is currently being conducted into the usage and benefits of stitch-bonded fabrics as a way to reinforce concrete. Fabrics produced with this process offer the potential of using "sensitive fiber materials such as glass and carbon with only little damage, non-crimp fiber orientation and variable distance between threads".[18]

In the extended stitch-bonding process (or the extended warp-knitting process), the compound needle that pierces the piles is shifted laterally according to the yarn guides.[17] This then makes it possible for the layers of the stitch-bonded fabric to be arranged freely and be made symmetrical in one working step.[17] This process is advantageous to the characteristics of the composite as the "residual stresses resulting from asymmetric alignment of the layers are avoided, [while] the tensile strength and the impact strength of the composite are improved."[20]

Needle shift technique is when both outer warp layers are secured in one procedure by incorporating a shift of the needle bar during stitching, creating endless possibilities for the arrangement and patterns in stitch-bonding.[17]