Haining Mingmao Textile Co., Ltd. tells you: What is the difference between weft knitted fabric and warp knitted fabric?
Compared with weft knitted fabrics, warp knitted fabrics have lower extensibility. Most weft knitted fabrics have significant lateral extensibility. The extensibility of warp knitted fabric is related to the number of comb teeth and microstructure. Some warp-knitted fabrics are stretchable in both the transverse and longitudinal directions, but some warp-knitted fabrics have good dimensional stability. Warp knitted fabrics can use different organizational structures to reduce loop shedding defects caused by broken yarns and voids such as warp knitted fabrics. In addition, knitted fabrics can be interwoven with different weft yarns and weft yarns to form different net structures and simple pattern changes. Almost all fabrics can be woven. However, on the other hand, it is difficult to obtain shaped products like some weft knitted fabrics. Generally, it needs to go through auxiliary processes such as cutting and sewing. In order to organize smoothly, warp knitting must be carried out.
Warp knitted fabric has certain elongation and stretchability, but its value is lower than that of weft knitted fabric. The factors that affect the tensile properties of the fabric are: fabric structure (for example, single rod, double rod warp knitting, Raschel warp knitting); fabric tightness (the tighter the fabric, the lower the tensile performance); the finishing process ( It can give the fabric good dimensional stability); machine number (that is, the number of needles per unit width); yarn type (such as elastic core yarn, low elasticity or poor fancy yarn, single yarn or good dimensional stability).
The methods to improve the strength of warp knitted fabrics are: use high-strength fiber yarns, use balanced yarns, use a higher number of machines and excellent high-strength yarns. In addition, the use of strands of different fiber strands and the change in roll length will also affect the strength of the fabric.
Types of knitted fabrics
Weft-knitted fabrics are often woven on various weft-knitting machines, such as low-stretch polyester yarns or profiled polyester yarns, nylon yarns, cotton yarns, wool yarns, etc. These fabrics adopt flat needle structure, change flat needle structure, rib flat needle structure, double rib flat Needle structure, jacquard structure, loop structure, etc. are knitted on various weft knitting machines. It has many varieties and generally has good elastic expansion.