Fabric Knowledge: According To What Principles Are Cotton Batches Approved?

The batching rules for foreskin cotton are specified in more detail. Foreskin cotton Group batch It should be the same as the type, the pattern, the main body, the length and the micron level. The type here refers to white cotton, yellow cotton and grey cotton, and the way of cotton rolling refers to cotton roller and sawtooth cotton.

The original standard stipulates: "in the same batch of cotton, 34% of the adjacent grades of cotton should be allowed to be priced." In order to improve the quality of cotton, the new standard stipulates: "in the same batch of cotton, no cross grade cotton is allowed; the proportion of cotton adjacent to the main grade should not exceed 20%. Those who do not agree should be selected or arranged for negotiation. The new standard abolished the unreasonable "34/66" rule of the original standard, which is also one of the contents of the major reform of the new standard.

A batch of cotton can be classified, and the cotton after the certification is calculated according to the test results of the original certificate. It is not appropriate to make a certificate between batch and batch. For sporadic cotton to be certified, it must be the same as type, pattern, main body, length and main micron value. The difference between the moisture regain of the package and the compartment is not more than 1%, and the impurity content difference is not more than 0.5%. The above conditions must be fully available before they can be certified, otherwise they will not be certified. The moisture regain and impurity rate were calculated according to the net weight average.

In terms of equipment, maintaining the normal mechanical state of each process is an important prerequisite for correctly handling the contradiction between improving quality and saving cotton. Especially for the contradiction between the cotton and the cotton, it is necessary to keep the "five fast" and the grinding method of the carding. It is an extremely important basic work and must be kept tight. In addition, to strengthen the noil test, in view of the situation of noil, the timely repair of the cleaning and washing machine is also a regular measure to save cotton from the equipment.

In the aspect of technology, the impurity removal efficiency and noil impurity content of each blowing machine are increased. The cleaning rate of cotton cleaning machine (except cotton box machinery) is over 60%. Cotton picker cotton The impurity removal efficiency can reach 65%, and the percentage of droppings and miscellaneous impurities of the carding machine is 40%. The total impurity removal efficiency of the carding machine is more than 92%. If we fail to meet the requirements, we must take measures to improve them in terms of technology and machinery.

In terms of operation: from the start of cleaning and unpacking, the operation of each process is carried out according to the operation rules, not only for quality but also for cost. For example, too much back flower production is often caused by poor operation, which will increase the cost of labor and power. When mixing chemical fiber and pure cotton, the correct blending ratio is often related to operation. If the blending of the blended products and the operation of pure cotton products inadvertently causes quality accidents, the problem is even more serious.

In the treatment of waste cotton: reuse and reuse. Replacing cotton with reusable cotton is one of the important ways to reduce the cost of cotton. The so-called reasonable reuse and reuse of cotton, first of all, should be treated, followed by the control of the amount of reuse, so as not to affect the quality. This includes needle flowers, combed noil, and soft cart flowers and top broken seeds that can be used for low coarse yarn. When planning a plan, a small number of yarns or sub brand yarns can be spun with a small number of machines, so that the reusable cotton produced by the company can be reused as far as possible in the enterprise itself, which is beneficial to reducing the cost of cotton production and cotton consumption of the whole enterprise.

Strictly manage the temperature and humidity of the rooms. The time and frequency of moisture regain should be determined according to the packing time and times, especially in the case of high humidity. Principle 。 Electric tide gauge and scale should be checked regularly. It is also important to measure and adjust the length of the yarn. Do the above work to avoid loss of weight.