Home >

A New Interpretation Of "Cotton Fine Wool Cotton Saw Tooth Processing"

2013/8/29 15:14:00 166

Cotton Industry Cotton Processing Cotton Spinning Enterprises

September 1st, the new cotton standard of GB1103-2012 "cotton fine wool cotton" will be formally implemented in China. The original a href= "//www.sjfzxm.com/news/index_c.asp" > velvet cotton < /a > national standard (GB1103-2007 cotton velvet cotton) will no longer be used.

in view of the two different processing methods of cotton fine staple cotton, such as sawtooth processing and roller processing, the GB1103-2012 "cotton fine cotton" has been revised to two national standards, namely, GB 1103.1 "cotton fine wool cotton saw tooth processing" and GB 1103.2 "cotton fine pile cotton roller processing", among which sawtooth cotton standard adopts color grading index system, and the roller roller cotton standard still maintains grade index system.

at present, 98% of the fine staple cotton in China's cotton market is sawtooth cotton.

So for the revision of the new standard, people pay more attention to the change of the content of GB 1103.1 "cotton fine wool cotton saw tooth processing".

This article will focus on analyzing the changes and effects of GB 1103.1 "cotton fine wool cotton saw tooth processing" (hereinafter referred to as the new standard).

The biggest change of new standard is to upgrade cotton grades from "grade" to "color level". Cotton inspection will rise from traditional artificial sensory examination to machine testing, and the realization is a qualitative leap from "human" to "machine".

the new cotton standard pays more attention to the internal quality of cotton. The indexes such as impurity rate, heterosexual fiber and short pile rate are more fully reflected in the standard than those of a href= "//www.sjfzxm.com/news/" > cotton textile enterprise < /a > actual production needs, which is more advantageous to cotton textile enterprises.

The promulgation and implementation of the new standard will change the traditional inspection method which used to rely on the sensory inspection of the inspectors. The cotton fiber tester with large capacity should be used to quickly test the cotton quality, and the grading standard of the cotton grade with color grade should be implemented so as to fully realize the instrument package inspection of the large package cotton foreskin, so as to realize the scientific and objective assessment of the cotton's internal quality.

the new standard is expected to solve the practical problems of serious disconnection between grade indicators and actual use, the phenomenon of cotton blending in special market environment, and the failure of cotton quality indicators.

quality requirement is meticulous .

content

in view of the two different processing methods of cotton fine staple cotton, such as sawtooth processing and roller processing, the current < a href= "//www.sjfzxm.com" > cotton color grading < /a > system is built on the basis of zigzag fine cotton, and can not meet the requirements of the roller roller cotton inspection.

Taking into account the retention of grade and color quality indicators in a standard, it is not conducive to abolishing grades, but also results in confusion of standard style and content in the same standard.

Therefore, the GB1103-2012 "cotton fine cotton" has been revised to two national standards, that is, GB 1103.1 "cotton fine wool cotton saw tooth processing" and GB 1103.2 "cotton fine pile cotton roller processing", among which sawtooth cotton standard adopts color grading index system, and the roller roller cotton standard still maintains the grade index system.

at present, China's "a href=" //www.sjfzxm.com "> cotton market < /a > circulation of fine cotton 98% is sawtooth cotton.

So for the revision of the new standard, people pay more attention to the change of the content of GB 1103.1 "cotton fine wool cotton saw tooth processing" (hereinafter referred to as the new standard).

the quality standard specified in the new standard includes 11 items: color level, mill quality, length, micron value, moisture regain, impurity content, fracture strength, length uniformity index, hazardous material (heterosexual fiber content), reflectivity and yellow depth.

Color level, mill quality, length, micron value, fracture strength, length uniformity index and hazardous debris are indicators of cotton quality.

Although moisture regain and impurity rate are quality indicators, the new standard is not "qualitative treatment", but "quantity processing", which is used to convert the fixed weight of cotton.

span lang= "EN-US" lang= "Microsoft";

Color Classification: according to the Yellow depth of cotton, the cotton is divided into 4 types: white cotton, light spot cotton, light yellow cotton and Huang Ranmian.

According to the degree of shade and shade of cotton, the white cotton is divided into 5 grades, the lighter cotton is divided into 3 grades, the yellow cotton dyed cotton is divided into 3 grades, and the yellow cotton is divided into 2 grades, which are 13 grades.

It is worth noting that the white cotton grade 3 is the color standard grade.

The color level is represented by two digits, the first is the level, and the second is the type.

color code symbol .

mill quality: according to the roughness of the appearance of the lint, the type and quantity of the defects, the quality of the rolling mill is divided into good, medium and poor grades, which are represented by P1, P2 and P3 respectively.

Good lint appearance is smooth, cotton is fluffy and uniform, fiber entanglement is low, fiber seed chips are few, neps are few, sterile seeds and broken seeds are few, silk, soft seed epidermis and stiff pieces are few.

The middle grade lint has a smooth surface, a uniform cotton layer and a general degree of fiber entanglement.

The appearance of uneven cotton lint is uneven, uneven cotton layer and high degree of fiber entanglement.

quality condition of rolling mill

the quality standard of rolling mill is made according to the quality grading condition of rolling mill and the reference index of mill quality, each of which is the bottom line standard.

the quality standard of rolling mill quality is kept in copies, copies and copies.

Keep the copy as the basis for the copy, and the copy is the basis for the imitation.

The standard of mill quality is the basis for evaluating the quality of cotton mill.

Copies and copies should be renewed every year and maintain stability at all levels.

The quality standard of rolling mill quality is one year (from September 1st to August 31st of next year).

length revision: the length limit of grade six and grade seven cotton is cancelled.

The original standard stipulates that the lengths of six and seven grades of cotton are measured in accordance with 25 millimeters, and are recorded as 25.0mm.

28 mm is the standard length.

The length standard of cotton handle length is determined according to the average length of the upper part of the cotton measured by the fiber fast tester.

That is, the length of the cotton hand pull should be calibrated to the average length of the upper part of the cotton measured by the fiber fast tester.

micron value: the new standard is divided into three levels and five files according to the value range of the micron value, and the B level is the standard standard of the micron standard.

micronan value grading table

moisture regain and impurity rate: the new standard stipulates that the moisture regain of cotton is 8.5% and the moisture regain of cotton is 10%.

The standard impurity rate of cotton is 2.5%.

In the standard revision process, < a target= "_blank" href= "//www.sjfzxm.com/" > textile < /a > the Department put forward: "with the improvement of cotton processing technology, under normal processing conditions, the impurity content of sawtooth cotton should be less than 2.5%, and the standard impurity rate is required to be revised".

However, due to the lack of experimental data in this field, we need further investigation in the future, and enough data will be revised.

fracture strength: a comparative study on the fracture strength of cotton between China and the United States in 2000 was conducted by the Ministry of agriculture. The results show that the fracture strength of cotton in China is comparable to that in the United States. Therefore, according to the Handbook of American cotton grading, the standard table of fracture specific strength is proposed.

the breaking strength and the code number .

length uniformity index: the length uniformity index is divided into 5 grades: high, high, medium, low and low. It is expressed by U1, U2, U3, U4 and U5 respectively.

length uniformity index, sub file and code name

hazardous materials: in order to effectively reduce the content of foreign fibers in cotton, the new standard puts forward more stringent requirements on the content of foreign fiber in the foreskin cotton on the basis of GB 1103-2007.

The data used in the classification are comprehensively determined according to the data provided by some textile enterprises and the opinions of the departments concerned.

The new standard divides heterosexual fiber content into four grades: "no, low, medium and high", and uses the first letter of the corresponding English word "N, L, M, H" as a code name.

In addition, the new standard stipulates that the cotton processing unit should brush the mark of foreign fiber when the cotton braid is brushed.

span lang= "EN-US" lang= "Microsoft";

omni-directional promotion of < a href= > //www.sjfzxm.com > Cotton Industry > /a > /strong > /p >

< .

harvest

higher requirements for machine picked cotton, processing and improving cotton processing mode

higher requirements for machine picked cotton

the quality level of China's machine picked cotton is lower than that of hand picking cotton, and the color level of the new standard is lower than that of grade.

According to the Xinjiang production and construction corps cotton association analysis, according to the new standard, the machine picked cotton will be reduced to about 4, and in the past it was mostly 2 to 3 grade, which means that the cotton yield per ton would be reduced by about 500 yuan. If there was a problem in the processing link, it would be possible to cause a drop in category, from white cotton to lighter cotton, and the yield of cotton per ton would drop by more than 700 yuan.

the Xinjiang production and construction corps cotton association personage said, entering the storage is the main sales channel of Xinjiang and corps cotton, this year's national cotton purchase price is 20400 yuan / ton.

In order to ensure the quality of cotton, the cotton planting division must attach importance to harvesting and processing of machine picked cotton, increase equipment investment and enhance the ability of technological pformation, so as to reduce the number of cotton cleaning and reduce the internal quality of cotton during harvesting and processing.

processing > /p >.

improvement < a href= "//www.sjfzxm.com" > cotton processing > /a > mode

statistical analysis of color distribution shows that the color level in Xinjiang is mainly concentrated in white cotton type, hand picked cotton white cotton 1, 2 and 3, machine picked cotton white cotton 2, 3, 4.

The the Yellow River basin, especially the Yangtze River Basin, should pay attention to grading and stacking.

the quality standard of the rolling mill in the new standard makes the cotton processing enterprises need to change the way of quick acquisition and rapid processing. The enterprises should keep reasonable speed and the poor quality of the cotton mill will not be able to store, especially the blending processing in the mainland may cause the color grade type to change, and the white cotton type will turn into a little dirty cotton.

In order to cope with the new standards to be implemented, some 400 cotton processing enterprises in Xinjiang, Jiangsu, Shandong and other types of cotton processing enterprises have made new leather cleaning machines, increasing the clearance of the miscellaneous and short fiber and "three silk" to improve the quality and color of the cotton, but the cotton fiber will be broken and broken when the skin cleaning machine is combed, so that the short wool rate and the strength of the cotton are reduced, which is not conducive to the production of cotton textile enterprises.

from the perspective of cotton enterprises in Akesu, Korla and Bachu, the cotton rolling enterprises plan to overhaul the equipment early, increase investment and replace the important parts of machinery in order to improve the quality of the lint mill because of the implementation of the new cotton standard in three places.

Some ginning plants indicated that they could only be tested by the production and cotton inspectors in the light of the color standards of cotton and the related production, purchase, processing, inspection and use aspects.

According to the requirements of the Technical Supervision Bureau of Xinjiang autonomous region and the Institute of fiber inspection, some ginning mills have increased the replacement of the equipment in the cotton inspection room. They are mainly the maintenance and purchase of the trial mill, the micron value measuring instrument and the cotton inspection table. The Mark value meter is mainly used in the territory for the MC type.

the new standard has revised the micronan value test method, and considering the difficulty or improvement of the storage in 2013, most of the cotton ginning enterprises have adjusted the seed cotton purchase strategy.

Because the cotton rank of Xinjiang cotton area is mainly in the 2 and 3 grades according to the original standard, the horse value will not appear C1, so this year some cotton ginning plants plan to start early scale, early purchase and early processing, instead of concentrating in the late September to mid October.

cotton

forming new cotton blending scheme

the original standard divides cotton into 7 grades. According to the original standard, it is difficult to become the basis for enterprises to purchase raw materials. Therefore, < a href= "//www.sjfzxm.com" > textile enterprises < /a > cotton usually has its own standard. No matter how the cotton is purchased, enterprises are reassessed according to their own standards.

The procurement is carried out according to the grade standard stipulated by the state, and cotton blending adopts the self determined standard which emphasizes physical indexes.

The new standard is refined to 4 color types and 13 color levels. It is very close to the "cotton matching standard" of the enterprise's habits, so that the standards used in the procurement and cotton blending links are consistent, and the problem of the uncoordinated use of cotton and the purchase price is completely solved.

the fundamental impact of the implementation of the new cotton standard on the textile enterprises is the change in the technology level assessment method in the factory, which in turn leads to the change of the financial cost accounting table in the factory (the enterprise decides itself according to its own product variety and equipment), and ultimately leads to the change of the policy of the inspection technology department and the raw material department in the factory, so as to achieve the goal of improving the product quality and saving the raw material cost of the enterprise.

It can be said that according to the new cotton standard, the enterprise has worked out a new cotton technology level evaluation form, and formed a new cotton blending scheme inside the factory, and formed a new settlement price table.

span lang= "EN-US" lang= "Microsoft";

settlement

increase < a href= "//www.sjfzxm.com" > cotton price < /a > /p >

the original standard is divided into 1~7 total of 7 grades, the standard level is three, from the three level up and down each level up, the price will have corresponding floating up or down about 3%, this is the grade difference rate.

According to the shade and yellow depth of cotton, the new standard is divided into four types: white cotton, light spotted cotton, light yellow cotton and yellow cotton. According to the degree of cotton brightness, the white cotton is divided into 5 grades, 3 grades of spotted cotton, 3 grades of light yellow cotton, 2 grades of Huang Ranmian, 13 color grades, and white cotton three grade is the standard grade.

Due to the change of quality evaluation system, there is no corresponding relationship between grade and color level, and a new price relationship based on quality indicators needs to be established. Therefore, the new trade settlement system comes into being with the new standard.

November 21, 2012, the China Cotton Association issued the domestic cotton trade rules that are compatible with the new standards, namely cotton sales contracts and general provisions (applicable to domestic cotton trade), or referred to as "Sino Cotton Association - domestic cotton clauses".

zigzag processing fine staple cotton quality difference price list

from "sawtooth processed fine cotton quality difference price list", the price of white cotton grade two and white cotton level is 300 yuan and 600 yuan respectively than that of white cotton grade three, while white cotton four level and white cotton five class price are 500 yuan and 1000 yuan lower than white cotton three grade.

the new standard divides the types and grades of cotton, so there are both types of price difference and grade difference. The difference of color level is more complicated than the original one.

In addition to the color level, the impact of the new standards on other trade knot indices, namely, the micron value, the length, the breaking strength, the length uniformity, the mill quality and the foreign fiber on the cotton price, is also greater than that of the original standard except the grade, the length, the Ma Kelong value, the fixed regain and the impurity rate.

Therefore, the new standard pays more attention to internal quality and closer to textile demand.

according to the new trade settlement system, the price of cotton purchase and storage in 2012 increased by 257.66 yuan / ton, and the price of cotton purchase and storage in 2011 increased by 195.54 yuan / ton.

The Yangtze River Valley and the the Yellow River River Basin have increased significantly, but the inland areas in the northwest have not increased much.

One of the main reasons is that the weight of grade indicators in trade settlement is too large. The new system is comprehensively considered according to the internal quality indicators. The weight of the color grade is reduced, and the two is the weight drop of the length index in the price.

In general, the new trade settlement system has increased < a href= "//www.sjfzxm.com" > cotton price < /a >.

dispel confusion

why does the new standard do not involve short staple rate?

in the new standard, there is no reference to the content of cotton short staple rate. Many cotton spinning enterprises are asking why.

Zheng Hegui, an expert in China Fiber Inspection Bureau, explained that the short fiber index is converted by the average length now, not directly measured.

The biggest problem is that it can not be calibrated. The test data can be high and low, the difference is very large, and the data are erratic.

According to the test data of cotton short pile rate in different counties of the country, the data of the highest and lowest county data are doubled, some data are more than ten, and some have reached more than thirty, so they can not be selected.

in addition, the labor intensity of detecting cotton short fiber rate by conventional instruments is very large.

A mature worker needs to test 4 samples, which can not meet the needs of package inspection.

The new standard did not increase the content of the short staple rate, mainly due to the inability to detect.

> a a href= "//www.sjfzxm.com" > cotton textile < /a > experts say that during their research, many cotton textile enterprises hope to put the short staple index into the new standard.

He said, our new standard is close to the US standard, and the US standard also has no short staple rate.

He believes that when the standard was formulated in the 90s of last century, the problem of short staple rate index was not very prominent because the cotton ginning process of the whole country was carried out in accordance with the unified requirements at the time when cotton was unified and unified.

Now that it is a market economy, cotton ginning is in accordance with the laws of the market.

In addition to technical considerations, the problem of "P" short staple rate is also a consideration of the interests of all parties.

Cotton ginning technology belongs to the field of agriculture. Cotton spinning enterprises belong to the industrial field. The two fields can not be completely butted.

If there are large enterprises in the upstream and downstream of the cotton textile industry chain, they will generally take account of all the processes.

In addition, the detection speed of cotton short staple rate is slow, and it may be technically difficult to achieve.

a person in charge of the enterprise thinks that although the new standard does not specify the cotton short staple rate, the cotton can be evaluated through the cotton length uniformity index.

Because these two indicators are related, enterprises can also pay attention to the length uniformity index of cotton.

However, most enterprises still believe that the short staple rate is very important to cotton spinning process, and directly determines the processing parameters such as noil rate.

core change

color level

The main change of new standard is to abolish the grade, increase the color level, the quality index and testing method of the rolling mill, change the color characteristic grade to the color level, and make clear that the relevant clauses of color level are mandatory clauses; add the definition of "white cotton, light spot cotton, Huang Ranmian, main color level and quality of the rolling mill"; define the color level division, color grading diagram and color level physical standard; define the color level inspection sensory test and the large capacity fast cotton fiber tester; and define the classification of the rolling quality, the quality grading condition of the rolling mill, the quality reference index of the rolling mill and the physical standard of the mill quality.

.

span lang= "EN-US" lang= "Microsoft";

line experience

Zhang Hongtao, deputy general manager of Shen Yu Textile Co., Ltd.: the grade of the original standard is judged by artificial senses. The color level of the new standard is determined by the instrument, reducing the artificial factors, and the test result will be more objective and fair.

From this perspective, with the wide application of new technologies such as information technology, the determination of cotton quality instead of artificial sensory judgement is an inevitable trend of future development.

The new standard has increased the fracture strength and length uniformity index, which is conducive to cotton blending in cotton textile enterprises. It is more convenient to use cotton purchased from regular channels, and no need to test the package again.

Yan Hui, engineer of Hengyuan Cotton Industry Co., Ltd.: cotton is divided into 7 grades according to the original standard, and the new standard is refined to 4 color types and 13 color levels.

According to the original standard grade, it is difficult to become the basis for enterprises to purchase raw materials, and the new standard covers all the indexes required by enterprises to match cotton. < a href= "//www.sjfzxm.com" > Enterprise matching cotton > /a > is more convenient.

Diao Xianqi, cotton inspectors of Hua Peng Cotton Industry Co., Ltd.: textile enterprises mainly consider the quality of yarn, and the original standard does not have relevant indicators. Once there is a trade dispute, it is difficult for textile enterprises to win the lawsuit.

The new standard defines many related indicators, and then the textile enterprises have the basis for solving the trade disputes.

Li Jiyuan, deputy chief engineer of Ping Cotton Textile Group: after a long period of time, raw cotton enters the enterprise, usually it needs packet inspection, classification and queuing, and then it is classified according to the varieties of production.

In the whole procedure, three or four people need to work two or three days.

In the new standard, all indicators required by the textile enterprises are included, and are fairly impartial through the instrument inspection.

The original a href= "//www.sjfzxm.com" > textile enterprise < /a > tedious inspection procedures can be omitted, and it will certainly be good for saving labor and reducing costs.