1Yarn into the dry level

In the evaluation of strip dryness, the influence of fiber length and fineness on strip dryness level is mainly considered, as well as the influence of fiber uniformity, maturity, water content, impurity content and short pile content. Among them, China's cotton moisture content is 10%, the maximum limit is 12%; The impurity content was 2.5% for sawtooth cotton and 3.0% for roller cotton.

2Yarn strength level

When evaluating the strength, the influences of the number of fiber roots in the yarn section, the length of fiber and the strength of single fiber are considered.

3Cost of yarn materials

The cost of yarn raw material is calculated according to the mixing ratio of various raw materials in each scheme and used as the cost evaluation index of cotton blending scheme.

4The value of the yarn

This is a comprehensive evaluation index, which considers both cost and strength.

5inventory

Give a clear answer to the stock situation of all kinds of raw materials in each cotton matching scheme: raw materials are enough or not enough. Therefore, it is determined whether the scheme can be adopted.

Such as:

OE10S (bars, three sections around 25% at Worcester level, strength 610N) :

35% raw cotton (grade 3 cotton) +65% waste (finishing, cutting, yards, back)

OE16S (stem, three sections at about 25% Worcester level, strong 380N) :

50% raw cotton (grade 3 cotton) +50% waste (finishing, cutting, yards, back)

Ring spinning C21 (stem, three sections around 25% at Worcester level, strength 436N) :

100% raw cotton (Grade 3 cotton)

Ring spinning C21 (shaft, three-section Worcester level 75%, strength 293N) :

100% raw cotton (grade 4 cotton)