Method for preparing high-grade and casual fabric with special leather feel using biologically corn-based fibres

1. A method for preparing a corn-based high grade fabric for casual clothing that has a special hand of leather, comprises the following steps: 1) selecting raw materials; 2) compositing by air-jet texturing; 3) weaving; and 4) dyeing and finishing

wherein the step of selecting raw materials comprises selecting as the raw materials a 0.3-0.5 D/PF corn-based polymeric fiber and a 0.2-0.4 D/PF polyester fiber;

wherein the step of compositing by air-jet texturing comprises drawing and stretching the corn-based polymeric fiber and the polyester fiber at a tension of 4.5-6.0 cN; and passing the two fibers through an air nozzle so that the two fibers are entwined to form an air textured yarn with a denier of 120-180 D,

wherein a step of yarn sizing comprises:

(1) sizing the air textured yarn in a sizing machine at a feed tension of 60-65 mN and a winding tension of 65-70 mN using a sizing slurry of 10-11% in concentration and a pressure of 1.6-1.8 cN at a soaking pressure of 2.1-2.3 cN;

(2) feeding the air textured yarn obtained from the sizing step for pre-drying in one or more drying rooms and cylinder-drying the pre-dried air textured yarn in one or more drying cylinders so that the sizing slurry penetrates into the yarn interior and forming a size film on the surface of the air textured yarn;

(3) applying 1% oil or an anti-static agent to the air textured yarn; and

(4) weaving the oiled air textured yarn at a weaving speed of 520-550 rpm/min to obtain a plain weaved fabric,

wherein the step of dyeing and finishing comprises:

(1) pre-treating the fabric in a bath at temperature of 110-120° C. for 30 minutes;

(2) pre-setting the fabric at a temperature of 70-80° C. for 40 seconds;

(3) treating the fabric in an alkali bath at a liquid ratio of 1:18 at a temperature of 120° C. for 45 min to achieve an alkali reduction rate of 11-12%;

(4) washing, drying, neutralizing the fabric to a pH value of 6-7;

(5) dyeing the fabric with a dyeing agent at a pH value of 5 and a liquid ratio of 1:40, wherein the dyeing agent has a temperature initially at 40-50° C., raised at a rate of 1-1.5° C./min to 80° C., maintained at 80° C. for 8 minutes, raised again at a rate of 0.5-0.8° C./min to 115° C., and maintained at 115° C. for 45 minutes, before being lowered to 80° C.; cleaning the fabric for 15-20 minutes using a reducing cleaning agent at 2.5 g/L; and neutralizing the fabric using acetic acid;

(6) treating the fabric using a resin water repellent at a speed of 40-50 m/min;

(7) finishing the fabric on a finishing machine at a temperature of 200-230° C. at a pressure of 40-60 T and a speed: 80-100 m/min; and

(8) calendering of one side of the fabric between a pair of rollers at a temperature of 130-160° C. and a speed of 25-30 m/min.

2. The method of claim 1 , wherein in the step of compositing by air-jet texturing, said drawing and stretching temperature is carried out at 110-125° C., a stretching ratio of 1.2-1.5, and a water supplying rate of 0.6-0.8 L/h.

3. The method for of claim 1 , wherein in the step of yarn sizing, the pre-drying is carried out in a first drying room in a temperature range of 136-138° C., and a second drying room: in a temperature range of 130-132° C., and further drying is carried out in five cylinders, where the first cylinder is in a temperature range of 98-100° C., the second and third cylinder are in a temperature range of 93-95° C., the fourth and fifth cylinder are in a temperature range of 90-92° C.

4. The method of claim 1 , wherein the step of finishing the fabric on the finishing machine is carried out at a temperature of 200-230° C., a pressure of 40-60 T, and a speed of 80-100 m/min.