What is the production process of suede fabric?

What is the production process of suede fabric?
Brushed and piled fabric is a kind of thin sanded pile fabric woven from polyester DTY superfine fiber. The surface of the fabric is covered with short, delicate and fine fluff. This kind of product has the functions of moisture absorption, breathability and waterproof, as well as the appearance and style of silk, soft texture, full of luster, and smooth to the touch.
Typical varieties include "peach skin" and so on. At present, the quality problems that are prone to occur in this kind of fabrics mainly include: the finished product feels thin, the wool feels poor, and the cloth surface is not plump; Not meeting the requirements.
The raw material requirements of this type of product mainly include: dyeing requires about 4.0 grade, because it is generally weft sanding, and the raw material is ultra-fine silk 9, in order to facilitate high-speed unwinding at 1500 ~ 2000m/min, add network 9, In order to make the raw material have better fluffiness for sanding, generally pre-screen POY between the wire cutter and the first feeding roller (the hole diameter of the network nozzle is 0.1 mm smaller than that used for ordinary filaments, which is convenient for post-processing of finished products. )
The elongation rate is 910%~15%, the boiling water shrinkage rate is 92.0%,~2.5% (the network point is too small to be opened during post-processing), the crimp elastic recovery rate and stability rate are high, ensuring a large gap in the cloth surface, and the finished product is fluffy Soft, non-slip between filaments, stable size, easy to penetrate with needles or emery grains, and improve the fluffing effect.
The key points to adapt to the texturing process of this kind of raw materials are: the deformation processing speed is 750-790 m/min; the temperature H of the first heating box is taken as: 190-200°C; H2 is 15-20° lower than H1 C; The D/Y ratio should be as high as possible to increase the false twist, and the K value should be adjusted to 0.85 ~ 1.0; the stretching ratio of 9 can meet the requirement that the wool yarn does not affect unwinding and the elongation is minimum.