Classification And Identification Of Adulterated Cotton

In cotton processing, the cotton which is mixed with non cotton or cotton material is collectively referred to as the raw cotton. Adulterated cotton 。 There are many kinds of adulterated raw cotton, which are characterized by low price, good marketability and high profit, and are the hot products of some lawless cotton processors. The adulteration of raw cotton is not only related to a certain market demand, but also related to the imperfection of the new cotton circulation system. The flooding of raw cotton has greatly wasted the limited cotton resources and seriously disturbed the normal. cotton The order of circulation seriously infringes the interests of the state, collectives and farmers. In recent years, although the Department of law enforcement has intensified its enforcement efforts, it has repeatedly banned it.

There are many kinds of raw cotton that are adulterated. There are two kinds of common raw materials in the market. One is cotton blended cotton lint mixed cotton, cotton - combed cotton blended cotton, cotton - recycled cotton blended cotton, cotton - washed cotton blended cotton, cotton - high and low grade mixed cotton and so on. The other is cotton blended with cotton. Water mixed cotton ; cotton - oil powder mixed cotton; cotton - chemical fiber mixed cotton and other types. According to these types of raw cotton, how do we identify it? First, we must correctly judge and evaluate the authenticity according to the three conditions of grade, and then use the five simple and convenient methods of visual inspection, hand feeling, hand pulling, papping and sniffing to analyze the composition of raw cotton, so as to distinguish the true and false. There are many other methods, such as instrument method.

The raw cotton mixed with one or two, three kinds of short cashmere and blended flannel is visually dark, with many impurities and small impurities. There are obvious striped short lint, which is slightly flapped, and has many fleece and dust. The length of the hand is uneven, and the staple fiber is very high. Smell no smell.

The raw cotton with recycled cotton has the visual color of grey, no silk texture, many impurities and small impurities, many broken small sterile seeds, seeds and so on. The hands are soft and slippery, the length of hand drawn is different, the strength is weak, the beating is slightly flapping, the flaps are flapped, the floral velvet is more, and the smell is not smelly.

The raw cotton with combed noil is visually clean, with less impurities, but there are obvious white stars or too many nodes, no mercerizing texture, soft touch, short hand pull, and a slight smell of oil.

The raw cotton mixed with washed cotton is visually white and has no mercerizing texture, less impurities, smooth handle, large elasticity when hand pulling length, not easy to be pulled off, good length uniformity, flapping no fly fleece and flying dust, smell smell of chemicals such as detergent.

The raw cotton mixed with low grade cotton is visually colored, gray and white, fibers arranged in disorder, the quality of the rolling mill is slightly worse, the X defects such as neps and wires are slightly more, and the handle elasticity is different. The length of the handle is poor and the strength is poor, and the smell is not smelly. This type of raw cotton is very common in the market. It is dubbed "what you need and what I want to build for you".

The raw cotton is watered and white. The handle is moist and slightly cold when the temperature is low. Raw cotton is inelastic. When the length of the hand is pulled, the fibers are easy to straighten up, strong, and not easy to be broken.

Raw cotton mixed with oil powder is a kind of adulterated raw cotton which disturbs the market and is very harmful. This kind of cotton not only increases weight greatly, but also easily produces "three entanglement" phenomenon in spinning process, which affects yarn quality and even harms cotton production. This kind of adulterated cotton has no abnormal color when it is visually measured. It feels a little smooth and feels heavy. The only way to identify it is to use a glass of hot water and soak the raw cotton.

The raw cotton with chemical fiber is visually clean, smooth and has a clear texture of silk. When the length of the hand is pulled, it is stronger and harder to break. There is a slight hissing sound and a smell of chemical smell.

In addition, there is an innumerable number of adulterated raw cotton mixed with talc and sand. In the identification, the above method is easy to get the result.

In short, practice is the only way to test true and false cotton. The above methods should not be applied in an inflexible way. Only by accumulating experience and knowledge in cotton inspection work and deeply understanding the essence of its technical methods can we contribute to our cotton business better.