棉花研究分析

棉花研究分析

分类：

（一）棉花基本分类

按长度来分，棉花分为长绒棉和细绒棉，细绒棉的长度一般在25~31毫米，长绒棉的长度在33毫米以上。我国所产原棉约99%为细绒棉。正常成熟的细绒棉，色精白、洁白或乳白，纤维柔软有丝光，长度23~33毫米，单纤维强力3.3~5克，细度4500~6400米/克。棉籽肥大，着生有灰白色短绒。

Classification:

(1) Cotton basic classification

According to the length, cotton into long-staple cotton and cotton, linen cotton length generally in 25 ~ 31 mm, the length of the leading producer of long-staple cotton in 33 mm and above.Raw cotton from about 99% in our country as the fine cotton.Normal mature of fine cotton, color white, white or milky white, fiber soft silk, 23 to 33 mm in length, single fiber strength 3.3 ~ 5 g, fineness of 4500 ~ 6400 m/g.Hypertrophy of cotton seed, born with grey linter.

（二）棉花质量主要指标

1．品级。品级是指棉花品质的级别。根据棉花的成熟程度、色泽特征和轧工质量，

分为7个级，7级以下为级外。品级标准级是3级。

主体品级：含有相邻品级的一批棉花中，所占比例80%及以上的品级。同一批棉花中，除了主体品级的比例达到80%及以上外，还不允许有跨主体品级的棉花。不符者应挑包整理或协商处理。（注：跨主体品级是指主体品级及其上下相邻品级之外的其它品级，即同一批棉花中，不能有与主体品级相差2个级及以上的棉花）。如：一批棉花中，(1)若1

级占10%，2级占80%，3级占10%，该批棉花的主体品级是2级。（2）若1级占10%，2

级占75%，3级占15%，则该批棉花无主体品级（没有占到80%及以上的级别），需重新整理。（3）若1级占90%，3级占10%，虽然主体品级1级的比例达90%，但有3级棉花存在，属跨主体品级1级的范围，该批棉花不符合国家标准的要求，需重新整理。

2．长度。棉花长度是指棉纤维伸直后的长度。国家标准规定：以1毫米为级距，采

用“保证长度”的原则，分为7个级。分级如下：

25毫米，包括25.9毫米及以下；

26毫米，包括26.0—26.9毫米；

27毫米，包括27.0—27.9毫米；

28毫米，包括28.8—28.9毫米；

29毫米，包括29.0—29.9毫米；

30毫米，包括30.0—30.9毫米；

31毫米，包括31.0毫米及以上。

5级棉花长度在于27毫米时，按27毫米计；6、7级棉花长度均按25毫米计。长度标准级是28毫米。

3．马克隆值。这是反映棉花成熟程度和细度的综合指标，国家标准规定分为A、B、C 三个级，标准级是B级。各级的范围是：

A级：3.7-4.2；

B级：3.5-3.6，4.3-4.9；

C级：3.4及以下，5.0及以上。

(2)The quality of cotton main indicators

1. The grades.Grade refers to the cotton quality level.According to the mature degree of cotton, color characteristics and the rolling quality of work, is divided into seven levels, level 7 level as below.Quality standard is level 3.

The subject grades: a batch of cotton, containing adjacent grade proportion of grade of 80% or more.With a batch of cotton, in addition to subject grade proportion reached 80% or more, also not allowed to have cross subject grades of

cotton.Inconsistent should choose package sorting or negotiation process.(note: cross subject grade quality refers to the subject and its adjacent grade other than grades, that is the same in the cotton, there can be differ with the subject grade cotton grade two and above).Such as: a group of cotton, if (1) level 1 (10%), 2 (80%), 3 (10%), the main body of the batch of cotton grade is grade 2.(2) if the level 1 (10%), 2 (75%), 3 (15%), then this batch of cotton without subject grades (no) accounted for 80% and above level, need to rearrange.(3) if the level 1 (90%), 3 (10%), while the subject grade level 1 ratio of 90%, but there is a level 3 cotton, is a cross subject of grade 1 level range, the batch of cotton does not accord with the requirement of national standard, need to rearrange.

2. Length.The cotton length refers to the length of cotton fiber after the

straight.Standard regulations of the state: 1 mm as notches, adopt the principle of "length", is divided into seven levels.Classification is as follows:

25 mm, including 25.9 mm and below;

26 mm, including 26.0-26.9 mm;

27 mm, including 27.0-27.9 mm;

28 mm, including 28.8-28.9 mm;

29 mm, including 29.0-29.9 mm;

30 mm, including 30.0-30.9 mm;

31 mm, including 31.0 mm and above.

Level 5 cotton length is 27 mm, according to 27 millimeters;Level 6 or 7 cotton length are calculated by 25 millimeters.The standard length is 28 mm.

3. The incompatible micronaire.