White silk production process raw silk production refers to the whole process from cocoon production to raw silk packaging and warehousing. And its technological process is: the mixed cocoon ─ ─ stripping cocoon to choose ─ cocoon, cocoon cooking and ─ ─ of reeling thread - after shaking ─ - finishing ─ and inspection.
1. Cocoon silk industry called cocoon station zhuangkou. Mixing cocoon is according to the requirements of the process design of two or more of the zhuang kou cocoon evenly mixed, the purpose is to expand the number of cocoon batch, balance the quality of raw material cocoon, stable process and operation, improve the quality and output of raw silk. Blending can be done manually or mechanically. Commonly used cocoon mixing machine has two kinds of cocoon mixing machine: hairy cocoon (with cocoon) and light cocoon (without cocoon).
2. The outer layer of cocoon coat, with thin and fragile fibers and disordered filaments, cannot be used for reeling silk, and must be removed first to facilitate cocoon selection and cocoon quality identification, and to ensure accurate cocoon movement and uniform cooking. Cocooning is done on a cocooning machine.
3. Select cocoon Are type cocoon size, each batch of silkworm cocoon cocoon layer thickness, color and other differences, therefore, must choose cocoon classified according to the requirements of process design, eliminate raw material cocoons can't silk reeling waste cocoon (such as double cocoon, thin skin, wear worm cocoon cocoon, cocoon, cocoon of heavy oil, yellow class soft continous cocoon, dark cocoon, cocoon, etc.), called roughing. The raw material cocoon after removing the foot cocoon is the car cocoon, which can be divided into the upper cocoon and the secondary cocoon. If the product grade requirements are high, in the cocoon quality is not ideal, it is necessary to strictly tick off the secondary cocoon, and according to the size of the classification, known as selection. The cocoon can be further selected according to its size, thickness and color. Cocoon selection equipment generally USES a simple conveyor cocoon selection machine, each equipped with 3 ~ 4 workers, division of labor is responsible for the manual cocoon selection. Classification and cocoon selection usually use a cocoon screening machine, the upper cocoon through the machine screen for separation.
4. The glue between cocoon filaments on the cocoon layer of boiled and dried cocoons exerts greater strength, while the filaments are drawn more rapidly and easily broken by reeling. The cocoon can be properly expanded and dissolved by boiling the cocoon to enhance the strength of the cocoon silk and ensure the continuous sequential dissociation of the cocoon silk. Therefore, the essence of cocoon cooking is to reduce the glue between the strands of silk to a certain extent, which is convenient for reeling silk. At present, the use of more circulating steam cocoon boiling machine. Cocoon cooking procedure is closely related to reeling output, quality and reeling. Such as temperature, steam pressure and other technological conditions, are subject to cocoon and produced raw silk grade, yield.
1. On November 17th, the quotation of domestic standard lint 3128B was 15,958 yuan/ton, 25 yuan/ton lower than that of yesterday.
2. The price of 32S standard cotton yarn is 23100 yuan/ton, the same as yesterday; 32S high cotton yarn with a price of 23880 yuan/ton, the same as yesterday; Pure polyester yarn 32S quote 13,800 yuan/ton, the same as yesterday; Quotation for 30S spun rayon yarn 19,450 yuan/ton, unchanged from yesterday.
3. Inventory pressure is difficult to ease, and downstream bearish expectations remain unchanged. Viscose staple fiber prices have been stable, but downstream users' short expectations remain unchanged, and it is difficult to mobilize their enthusiasm to take goods. Currently, the center of discussion at the middle end is maintained at 14500-14600 yuan/ton. High-end viscose price fluctuations are not large, the overall demand is weak, but I heard that recently there are tens of thousands of tons of large orders. At present, the execution price of large orders of mainstream large factories is around 15,000 yuan/ton.
4, the trend of raw materials fell, polyester short market stability and wait and see. TA futures narrow range shock in the morning, polyester market finishing is the main, polyester short market stability and wait and see, 1.4d direct spinning polyester short mainstream reported 9200-9400 yuan/ton factory, the space for discussion is different, relative to the mainstream discussion or in the factory near 9150-9250 yuan/ton, some slightly higher there is 9300-9400 yuan/ton factory near. Shandong, hebei polyester short market arrangement is the main, 1.4d direct spinning polyester short manufacturers quoted 9250-9600 yuan/ton to be delivered within the province, the discussion is expected to be delivered within 9200-9450 yuan/province to the vicinity, the specific single real talk is the main, the general inquiry.