Detailed Explanation Of Mink Skin Processing Technology

1. Processing technology of mink skin

(1) raw skin shunting

(two) weighing

(three) immersion

The operation requires that the water should be adjusted to the specified temperature, add chemical material, and turn it on and turn it on. After the dissolving material is dissolved, the skin will be put into operation. After 1~1.5 hours, it will be rotated for 10~15 minutes every 2 hours until the specified time.

(four) throw water into the centrifuge to dry.

(five) turn the board and turn the board outward to facilitate the operation.

(six) stretch with stretches.

(seven) roller sawdust, besides removing skin surface grease, and further loosening the skin fiber.

Equipment: wooden drum, old sawdust with a skin weight of 2:1, and the time is 30 minutes.

(eight) the sawdust is carried out in a rotating cage for 30 minutes.

(nine) water immersion and degreasing

Objective to further soften the skin plate and degrease it to make the fur clean.

The operation requirement is the same as the first time.

(ten) water swinging is carried out by centrifuge.

(eleven) Shaw uses a shaving machine to cut the head, mouth fork and ear root first, then cut the neck. The key points are to cut the head and spine parts, and to cut the abdomen once again.

(twelve) shovel the skin with a big knife or big shovel to squeeze the oil and meat.

(thirteen) softening

The operation requirements are adjusted to the specified water temperature. Add all kinds of chemical materials. After mixing evenly, the skin is continuously rotated for 40 minutes. After careful observation, the hair root slightly loosened, and immediately softened.

Before softening, check the skin of raw materials. The skin that has the needle sliding phenomenon can not be softened and must be picked out.

(fourteen) after rinsing the skin, soften the skin and hair and float on the surface with some dirt. Washing with water can make the hair and leather plate clean and stop the enzyme activity at the same time.

(fifteen) throwing water with centrifuge, and drier the better.

(sixteen) dipping acid

The purpose is to stop softening and prepare for the future tanning process. Loose fiber can not produce acid expansion.

The operation requires that the water is heated to the specified temperature. Salt and mirabilite are added. The acid is added evenly and then the pH value is measured after stirring. After reaching the requirement, the skin is rotated for 30 minutes, and the rotation is intermittent.

(seventeen) the better the water is thrown away, the better.

(eighteen) tanning can make the leather plate soft and plump by tanning, and improve its temperature and water resistance.

The skin plate should be white and not swollen.

The operation requires that the water be heated to the specified temperature. Add salt, ammonium nitrate and ammonium alum. Stir for 5~10 minutes. Then add the 1.5 grams / liter of soda after 4 hours. Then add 1.5 grams / liter of soda after 4 hours and measure the pH value.

If the requirements do not meet the requirements, continue to add soda ash to adjust the pH value until the requirements are met.

(nineteen) control water, quiet and water.

(twenty) the skin after retanning is colored with the same conditions.

The skin that does not add colour does not carry out retanning.

(twenty-one) dry and static control of drying degree, do not dry, dry until moisture content 20%, static, prevent air drying.

(twenty-two) the extensional shearing machine extends the width, loosely fibers and increases the gap between fibers to create conditions for the Fatliquoring Process.

The key is neck.

(twenty-three) elongate with bench type elongating machine.

(twenty-four) the fatliquoring (oil) equipment is a constant temperature drum. The time is 40~60 minutes, the temperature is 40 centigrade. The kicking oil is 50 grams / sheet of the male leather and 30 grams / sheet of the mother's skin.

Operation: heat the kicking oil to 40 C and put it into the drum. Add the skin to the specified time.

(twenty-five) overnight after adding the fat to the skin, the oil is further oxidized to combine with the skin fiber.

(twenty-six) kick the skin through the mechanical function of the leather kicking machine, so that the grease can penetrate into the deep part of the skin fiber and distribute evenly so as to make the oil soft effect better.

Kicking time is 40 minutes in summer and 60 minutes in winter.

Note that the temperature should not exceed 40 degrees when kicking.

(twenty-seven) rolling is carried out with a drum at the end and pferred to the surface.

(twenty-eight) in addition to the use of rotary cage at the end.

(twenty-nine) the two times of fatliquoring does not make two times of fatliquoring, and the two times of the fatliquoring is 30~40 g / Zhang.

(thirty) after finishing finishing, kick the skin (with the first kick), turn sawdust to sawdust, turn the hair outward, dry clean and degrease (dry cleaning machine, dry cleaning time 3~5 minutes), turn the board outward, extend the width to lengthen a white (use starch to adsorb the skin plate, coat the grease that adhered, and improve the whiteness of the skin board at the same time.

Equipment: drum, starch 2 kg / 100 skin, time 40 minutes) to kick white (in the kicking machine, and add a small amount of starch, time 40 minutes). Extend the width to lengthen, turn the hair outward to turn the sawdust (equipment: drum, sawdust 1 kg skin, three atmosphere ethylene 7 liters / 100 kg sawdust, time 4 hours).

It is required to clean the oil residue, make the skin plate smooth, not expose the hair root), then extend the width to lengthen, turn the hair outward to increase (improve the gloss of the wool quilt, and make the pine loose loose.

Equipment: rotary drum; gloss agent: 5 kg / 100 grams sawdust, time 4 hours) to sawdust to turn the plate outward to mill 2 times (the same time as the first time).