The Influence Of Lint Quality On The Evenness Of Spinning Yarn

Cotton is the main cash crop for agricultural production in China, and is the main raw material of the textile industry. In particular, Xinjiang as a national high quality cotton production base, cotton production occupies a very important proportion in the economic strategy of "one black and one white" in Xinjiang.

Cotton is from production, purchase, processing, inspection and so on.

It is necessary for us to understand the impact of lint quality on spinning and enhance our quality consciousness.

First, let's talk about some basic concepts of yarn.

Yarn is a thin and long product made of the first twist and the tensile strength and softness of the filament or filament.

The strands are made of two or more yarns, which are made of second twists. The fineness, strength and evenness of the products are little improved.

Strong is a product made of strands and passed through third twists.

There are many kinds of yarns and different hair styles. They are generally divided into five types: staple yarn, filament yarn, bulky yarn, fancy yarn and composite yarn.

Yes

Evenness refers to the evenness of the cross section of the yarn in the length direction.

Evenness of yarn evenness plays a decisive role in evenness of cloth evenness, and evenness is the main basis for textile grading.

The resultant yarn is uniform in evenness, smooth in cloth, clear in texture, small in size and comfortable in hand, and the quality of textile processed by it is also high.

Knitted fabrics require higher evenness than woven fabrics, especially for details and slub yarn. They will cause obvious defects in broken ends.

If you want a good fabric appearance, you must have a good yarn evenness.

The following 5 factors in raw cotton have a major effect on yarn evenness.

(1) length uniformity of short fiber content.

Fiber length is the main basis for spinning process and equipment.

The spinning parameters such as roller spacing, pressure, drafting ratio and twist have a significant effect on yarn evenness.

The short fiber content is closely related to the length uniformity.

Therefore, the length uniformity and short fiber content have great influence on yarn evenness.

In the spinning process, the drafting mechanism can not effectively control the fibers of different lengths.

Some fibers are out of control and float for a long time, which constitute the main part of planktonic fibers.

The more floating fibers, the more serious the uneven formation.

If there is a difference in the lint producing area of the textile mill and the length difference is bigger, besides the short fiber content, we should pay attention to the length uniformity of the fiber and reduce the length difference of the cotton in different places.

Because the length of the mixed cotton is poor.

The parameters such as roller spacing should be adjusted.

(2) harmful defects.

Cotton neps and fibers in raw cotton are quiet.

Broken seeds, soft seed epidermis, stiff pieces, yellow roots and other defects, especially with fiber seed chips, interfere with fiber in drafting process, causing irregular movement of fibers, disrupting normal draft and drying flowers.

Defects usually do not become smaller or thinner in drafting, and are often wrapped in slivers to form coarse joints.

The short fiber content and harmful defects in raw cotton will increase if the maturity is low and the quality of the rolling mill is poor.