Drying And Finishing Of Fur

After wet processing, such as tanning, dyeing and fatliquoring, the fur needs to be pferred to the drying and finishing stage of fur.

The main processes include drying, moisture regain, rolling soft, hooking, grinding, leather degreasing, rinsing, combing, dedusting, refurbishing, measuring and checking.

There are different ways of processing objects and processing, and the adjustment and adjustment of processes should be adjusted accordingly.

The skins are light, thin and soft, and the hair is loose, flexible, bright, clean, no hook hair and no quicksand.

1. dried tanned and fat filled furs, of which water content is generally over 60%, while the moisture content of fur products is 12%~18%.

The wet skin has large plasticity, and the skin fiber is not fixed. It can not be operated mechanically. After drying, the skin fiber structure is stereotyped, so that it can be easily arranged and beautified.

There are 4 commonly used drying methods.

L naturally dries the fur on the ground or hangs the leather on the pole or string, and makes the skin dry by the natural flow of the air.

(2) drying rooms and drying channels are equipped with facilities for heating, blowing and exhausting in the drying room or drying channel, which are not affected by environmental climate, and have the characteristics of fast drying speed and high efficiency.

(3) fixed dry to fix fur on board or frame, then dry.

The moisture content of the skin before drying is controlled at 30%~40%.

(4) rotary drum drying in the drum into the hot air, while rotating and drying, not only has the role of rolling soft, but also to achieve the purpose of drying.

No matter which way to dry, the skin should be evenly distributed. After drying, the skin should be stored for more than 12 hours to balance the moisture in the skin.

2. restores the dried skin. Due to the need of processing, it needs to re absorb moisture. It is called moisture regain or softening.

After drying, the fiber is in a bonding state, the area is contracted, and the skin is stiff.

The purpose of moisture regain is to make the dried fur get the appropriate moisture and become soft, so as to facilitate the process of shovel and soft.

It is recommended that the skin should not be dry or over floating. The moisture content of the whole skin is even. After the moisture regain, the skin board can be pulled out and white.

Water content is most 18%~20%.

Use the shovel, hook soft machine, shovel soft machine and grinding machine to make certain mechanical operation on the skin plate, make the skin fiber loose and extend, and remove the meat residue from the skin plate, make the skin board as soft as possible, soften and light, and clean the skin plate through the operation of shovel soft, grinding and so on. At the same time, do not expose the hair root. Do not lose the hair. The degreasing and rinsing of the 4. skin board are used for some grease containing large fur such as sheep brick and mink skin. The degreasing before the tanning is not enough, because the preparation section can only remove the grease on the surface, and there are a lot of grease in the leather. If the net is not removed, it will affect the use of the fur. The drum can be used for moisture regain, direct spray and moisture regain, 3. hooks and soft shedding.

In the finishing stage, degreasing is often used in dry cleaning machines.

In order to further remove the dirt, impurities and greasy fur on the fur, it will make the finished products soft and plump, improve the elongation and permeability, and increase the gloss of the woolen quilts.

The main equipment used for rinsing is grooving.

Technical conditions: liquid ratio is 30 liters / sheets, detergent 4 g / liter, soda 0.5 g / liter, temperature 50 centigrade, time 1 hours, pH value 9.5~10.

5. rolling and stretching, in order to make the leather plate soft and loose, flexible, bright and clean, remove the floating color on the fur, increase the gloss of the fur, and roll the fur.

Rolling and stretching operations can be repeated many times.

In order to enhance the rolling effect, the clean sawdust can be added into the sawdust, and some organic solvents such as light gasoline or turpentine can be added to the sawdust.

6. hair is applied on the hair raising machine to remove dust, sawdust and so on.

7. carding is usually done on the carding machine, and the hair is combed, so that the wool is in a certain direction, and the sawdust, dust and floating hair remaining in the hair are removed at the same time, which makes the appearance of the finished product beautiful.

Careful operation is required to minimize hair loss and not to damage the skin.

8. shearing is applied to the shearing machine, which is used for some low-grade leather imitation high-grade leather.

After shearing, the wool is smoothed and reached the required wool length.

9. dust removal is to remove dust from fur.

Ask for fur to shake in the sun without dust.

The cage can be used for dust removal.

The best fur should be dusting by vacuum cleaner.

After the 10. gauge is qualified, the area of the skin is measured to provide basis for the tailoring section.

When measuring the skin, the area error should not exceed 2%.

Editor in chief: vivi