▶Knotting
It is a traditional method of making fishing nets. The fishing net is tacked with warp threads and weft threads in a shuttle. The size of the nodules is 4 times the diameter of the net rope and protrudes from the plane of the net. This kind of net is called a knotted net. When the nodules collide with the fish and the ship's side when the net is set up, it will damage the fish and wear the net, and because the chemical fiber is smooth and elastic, it is easy to cause problems such as loose nodules and uneven meshes.
▶Strangulation
The two sets of yarns are twisted by the machine at the same time, and they pass through each other to form a net at the handover point. This kind of net is called a twist-free net. Because the yarn at the knots of the net is not bent, the net is smooth, and friction is reduced, but the twisting machine has low efficiency, complicated preparation procedures, and limited horizontal meshes. It is only suitable for weaving nets with larger meshes.
▶Warp knitting
Usually, a Raschel warp knitting machine equipped with 4 to 8 bars is used to connect the warp yarns into a loop to form a net, which is called a warp-knitting no knot net. Due to the high speed of the warp knitting machine (600 rpm), the width of the knitting mesh is wide, the number of horizontal meshes can reach more than 800 meshes, it is convenient to change the specifications, and the production efficiency is several times higher than the previous two methods. The warp-knitted non-knotted net is flat, wear-resistant, light in weight, stable in structure, high in knot strength, and the net is not deformed or loose after damage. It can be widely used in marine fishing, freshwater fishing and aquaculture, and various other special purposes.