What are the main indicators for assessing yarn quality

1) Weight deviation: refers to the percentage of weight difference between real spinning linear density and design linear density. The common assessment indicator is the weight deviation of 100m, which is generally controlled within the range of -2.52.5.

How to calculate the cost price of knitted fabrics in the textile industry

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Linen fabric

Flax, also known as jute and flax, is divided into three categories: fiber, oil and fiber oil. They are all annual herbs. Flax fiber exists in the phloem tissue of hemp stem. After retting, soaking and degumming, part of the gum is removed to make the adhesive fiber bundle loose, and then processed into "beating hemp" by pressing, rolling and beating hemp, which is a process fiber composed of 10 ~ 20 single fibers. It is one of the main fiber raw materials for summer clothes because of its good moisture absorption, fast moisture transmission and relatively fine diameter. Usually, the cloth made of flax fiber is called flax fabric. After the fiber is harvested with flax, it is bundled into small handfuls for retting and degumming. The temperature of warm water retting hemp should be controlled between 28 ~ 32 ℃. After about 100 hours, remove the hemp rod into an umbrella and dry it in the open. Rain and dew retting is to spread the harvested hemp stems on the grassland or flax field, soak in rain and dew, and use mold fermentation retting. Under suitable humidity conditions, after 7 ~ 10 days, break the retted stem, remove the xylem and impurities, comb the fiber, and then grade it by quality. The short hemp knocked off is called two coarse hemp.

Know flax

Flax is an important raw material in flax textile industry. Its fiber is strong, soft and fine, and has good color. Flax fiber is large, not easy to rot in water and waterproof. In addition, it has the unique advantages of friction resistance, high temperature resistance, fast heat dissipation, low dust absorption rate, not easy to tear, not easy to burn, no static electricity, acid and alkali resistance, etc. it is a textile raw material pursuing green environmental protection and is known as the "Queen" of natural fibers. It was recorded in various herbal pharmacopoeia in ancient times. Flax has the effects of warming and non-toxic, promoting blood circulation and moistening dryness, dispelling wind and detoxification, benefiting liver and kidney and maintaining skin, especially when applied to skin treatment. According to the traditional view of traditional Chinese medicine, Chinese textile experts believe that flax is the cortical fiber of plants. Its function is similar to human skin. It has natural properties such as protecting the body and regulating temperature. Linen clothing can reduce the sweating of the human body than other clothing materials. The water absorption speed is several times faster than silk, rayon and even cotton cloth. When it comes into contact with the skin, it forms capillary phenomenon, which is the extension of the skin. Flax's natural air permeability, moisture absorption, freshness and moisture removal make it a free breathing textile. It can reduce the human body's room temperature by 4-8 ℃ at room temperature, which is called "natural air conditioning". Flax fiber has important applications in textile industry. Compared with cotton and wool, flax fiber has insufficient softness and elasticity, but high strength, which is second only to ramie in Ramie crops. Flax fiber can be spun into high count yarn and exquisite fabric with special textile technology. Flax weaving has a long history in Ireland, Scotland, France and Belgium, and flax textile technology has been greatly developed in these areas. Woolen fiber can be used to make towels, mats, string, backpacks, banknote printing paper, etc. The investigation shows that linen underwear can adjust people's meridian system and endocrine system, so as to have a sedative effect on the central nervous system; Flax is used as bedding, and its summer heat relieving effect is better than cotton products. People are not only easy to sleep, but also sleep sweetly, which is conducive to beauty and health. Moreover, because the fiber of flax is hollow and rich in oxygen, anaerobic bacteria cannot survive and has good antibacterial performance. It is a health fabric. Flax also has no static electricity due to the balance of positive and negative charges, no dust adsorption, and its hygienic properties are also talked about by people. Due to its many advantages and elegant color returning to nature, flax has become a recognized environmental protection product. Flax series products have been loved by the majority of consumers. Especially in some developed countries, flax products are high-grade products, which are the symbol of fashion and identity. They are favored by the majority of consumers because of their natural green and environmental protection characteristics. With the continuous improvement of people's living standards in our country, people prefer the unique concept brought by flax more and more.

Understand flax

As a kind of raw material health care textile, hemp textile has attracted more and more attention. In order to more scientifically and realistically develop, study and verify the health care function of hemp textiles, people have done a lot of verification and difficult experiments and identification. They said: 1. Hygiene: the director of the Russian flax phloem Research Institute, rivikin, identified that for the human body (especially the patients with skin diseases), wearing any fabric can not compare with flax fabric. 2. Comfort: S. Davis of the United States uses computer electrogram to record the effects of eye movement and humidity between mats, body and skin temperature on sleep. The investigation shows that compared with cotton sheets, flax mats make it easier to fall asleep, sleep well and feel happy after waking up. 3. Coolness: Russian research institutions have conducted experiments in Central Asia for 7 years and proved that the surface temperature of linen clothing is 2-2.5 ℃ lower than that of cotton and silk clothing, while the temperature between skin and clothing is 3-4 ℃ lower than that of other fabrics. The adhesion of linen fabric to skin is only 70% of that of cotton fabric. 4. Antibacterial activity: the Department of Health Microbiology, School of public health, Shanghai Medical University detected the survival of bacteria on three mats at different times by contact method. The results showed that compared with bamboo mats and straw mats, flax mats had significant antibacterial effect. The antibacterial rate against international standard bacteria such as Pseudomonas aeruginosa and white pearl bacteria was more than 65%, and against Escherichia coli The bacteriostatic rate of Staphylococcus aureus is more than 90%.

Washing and drying of hemp fabrics (clothing)

1. The washing requirements of linen fabric are basically the same as those of cotton cloth. Alkaline detergent is selected, but the soaking time should not be too long. 2. Hemp fiber is generally rigid and has poor holding force. It should be kneaded gently. It is not suitable to knead strongly on the washboard. It is also forbidden to brush with a hard brush to avoid fuzzing. 3. After washing, do not squeeze or dehydrate with force to prevent wrinkles caused by hemp fiber sliding and affect the appearance and wear resistance. 4. When drying, the collar and seam of the clothes should be flattened and straightened to dry. Avoid exposure to the sun to prevent fading, and there is no need for additional ironing. 5. The removal method of various stains on linen fabric is also the same as that on cotton fabric. However, if there are slight cigarette burns on linen fabric, it can be wiped with a piece of lemon and then dried in the sun for a while.

What is linen? What is the composition of linen?

What is linen? What is the composition of linen? With the emergence of new varieties, new technologies, new spinning methods, new weaving methods and new finishing processes, the development momentum of linen products industry is getting better and better. Flax fabric has the functions of temperature regulation, anti allergy, anti-static and antibacterial. Due to the good moisture absorption of flax and can absorb 20 times of its own weight, flax fabric feels dry. The birth of wrinkle proof and non iron flax products and the emergence of blended products further expand the market of flax products. The products include delicate and elegant linen handkerchiefs, shirt materials, crepe, fancy yarn products, sportswear and linen wool blended products. What is linen? What is the composition of linen? Linen composition: 1. In addition to synthetic fiber, linen is a strong kind of textile. It has high fiber strength and is not easy to tear or puncture. It can be scraped and pressed by the color mixing knife. 2. Linen is a dense linen woven by the intersection of warp and weft, which has good coloring performance. 3. Linen is woven by twisting linen into thread. The surface is not as smooth as chemical fiber and cotton. It has vivid concave convex texture. Painters often use the subtle and interesting material beauty of linen. 4. Flax cloth and flaxseed oil are from the same plant, have the same chemical properties and can support each other. 5. Linen is different from single thread weaving (SW) and double thread weaving (DW), which is easy to be processed into various specifications with different thickness, thickness and texture. Coarse grained linen is suitable for painting with large and scraper. It is an ideal canvas with bold and incisive brushwork. Medium density linen is flat and uniform in texture, which is suitable for the expression method of kneading and covering dyeing in realistic style. Fine grain linen is mostly used in small works, which is suitable for fine painting style.

The advantages and disadvantages of flax fabric, the reason why flax is popular?

Advantages of linen Firstly, linen fabric is a kind of fabric with good moisture absorption and moisture conductivity. Flax fabric is woven with flax fiber as the main raw material. Therefore, flax fabric and flax fiber have similar characteristics, that is, flax fabric has very good moisture conductivity and moisture absorption. Scientific experiments have proved that linen can absorb more than 20 times its own weight. It can be seen that linen fabric has very good temperature regulation performance. Secondly, flax fabric has very good anti allergy performance. The raw material of flax fabric is flax fiber, which is extracted from flax through degumming process. It is a pure natural raw material and does not contain any substances harmful to human body. Therefore, linen has very good anti allergy properties. In addition, linen has other advantages. Flax fabric is better in anti-static and antibacterial than other fabrics, and flax fabric has the characteristics of lightness and coolness. Three disadvantages of flax fabric 1. Easy to wrinkle. Flax is a natural fiber. This material is full of toughness, but it has no elasticity. Other fabrics will slowly return to their original shape after deformation, but flax can't do it. Once deformed, it can only wrinkle. 2. Poor dimensional stability. This is also because it is easy to wrinkle, so it is not good to measure the size, and there will be deviation. 3. Wearing close to the body will have a harsh feeling. As we all know, flax is a natural feature, so the treatment process will retain its characteristics first, so it is inevitable to feel uncomfortable. Although linen has its advantages and disadvantages, it will become more and more popular with the adaptation of environmental protection slogans and the promotion of fashion people. Remind everyone that linen washing should pay attention to. If it is a simple linen garment, there are no special requirements for washing and maintenance. Just be careful. However, if there is a sandwich, the shrinkage difference between the two fabrics should be considered to prevent deformation. What are the advantages of linen clothes Advantages of linen clothes 1: linen clothes have strong moisture absorption and moisture dissipation ability. In the wet rainy season, if the wall cloth, tablecloth, curtains and sheets in the room are replaced with linen, it can effectively reduce the indoor humidity. In the dry autumn and winter season, if linen is used, the indoor will not be too dry. Linen has a good effect on keeping the air humidity relatively constant. Advantages of linen clothes 2: linen clothes have disease prevention effect. Linen clothes have high strength, good corrosion resistance, and are easy to absorb sweat and disperse moisture, so it is conducive to prevent some skin diseases, such as rash, skin itching and so on. In addition, compared with cotton fabrics, linen clothes are wet spun without dry spinning burrs, and there is no itching feeling when wearing close to the body. Therefore, linen clothes are an ideal choice in hot summer. Advantages of linen clothes 3: linen clothes are not easy to carry static electricity and absorb dust. Some hospitals and nursing homes use linen for bedding and surgical clothes. Advantages of linen clothes 4: linen clothes can effectively reduce the harmful effect of magnetic field on human body. It has been reported that the body of the staff investigating in Antarctica is vulnerable to the influence of strong magnetic field, while the team members wearing linen clothes and using linen tents are in good health and have little impact. Identification of linen clothes (1) Check whether the thickness of longitude and latitude lines is uniform through light transmission. If the warp and weft lines are too uniform, it may be cotton fabric. (2) Tighten the cloth grain and check the compactness of the weaving. (3) Fine primary color linen is brown, shiny and absorbs water evenly. Flax is of poor quality. It is treated into soft fiber linen. It absorbs water unevenly and will turn black when wet. (4) For worsted linen, the less Plush on the surface, the better. (5) The vertical and horizontal tightness of semi linen is different. (6) Pull a thread end. If there is bending and separation at both ends, the thread is cotton. The ends of the torn flax thread should be smooth, otherwise it is impure. (7) If caustic soda water is applied to the canvas, flax will appear brownish yellow and cotton cloth will appear light yellow.