Advantages and disadvantages of pure cotton denim fabric, jeans are a kind of pants that we are all familiar with. Many people wear jeans because they are very fashionable and beautiful, but many people don't know their materials. Let's take a look at the advantages and disadvantages of pure cotton denim fabric.
Advantages and disadvantages of cotton denim fabric 1 cotton jeans are soft, breathable and comfortable to absorb sweat, but easy to wrinkle; Cotton jeans are the fabric used to make jeans. The cotton content is very high, close to 95%. Feel the intimacy and texture of denim fabric with your hands, with different hardness, rough and delicate, and diverse elasticity and plasticity.
Extended data:
Pure cotton coarse twill fabric is easy to absorb moisture, moisture and sweat, and has good air permeability, so it is comfortable to wear. Thick texture and clear lines. After proper treatment, wrinkles, shrinkage and deformation can be prevented. Indigo is a harmonious color, which can be matched with coats of various colors. Indigo is a non-solid color, suitable for all seasons. The more washed, the lighter, the more beautiful. Then look at denim fabrics with different raw materials.
A small proportion of spandex yarn (about 3-4% of the yarn weight) is used as elastic warp or weft of core-spun yarn, and a low proportion of polyester-cotton blended yarn is used for woven elastic denim. Snowflake denim with blank effect after dyeing is made of cotton and linen, and high-grade denim made of cotton-wool blended yarn is made of medium-length fiber (T/R). Then look at the denim fabrics of different colors woven by the same processing technology.
When the warp yarns of bark crepe denim woven with high twist weft yarns are dyed, the dyed denim is first dyed with dyes such as sulfur or Haichanglan, and then dyed with indigo. Color striped denim with colored warp embedded in indigo warp is dyed with pure cotton indigo yarn and natural weft yarn, and interwoven with twill weave of upper three layers and lower one layer. Generally, it can be divided into light, medium and heavy categories. The width of cloth is mostly between 1 14- 152 cm.
Advantages and disadvantages of pure cotton denim 2 1, performance characteristics of pure cotton denim
The characteristics of denim fabric depend on its raw material composition, yarn characteristics, weave structure, weaving method and other factors, especially finishing plays an important role in the characteristics of denim fabric.
2. Appearance and feel characteristics of pure cotton denim
Feel the intimacy and texture of denim fabric with your hands, with different hardness, rough and delicate, and diverse elasticity and plasticity. Denim produced by pure cotton combed yarn has smooth surface, clear grain and smooth feel.
Ordinary wash jeans is soft and comfortable; After stone washing, the cloth surface is gray and old, with mild to severe damage; Enzymatic washing can slightly fade the cloth surface, and depilation will produce the effect of "peach skin velvet" and obtain a lasting soft effect; There is a certain fading phenomenon and old feeling after sand washing. If matched with a stone mill, the surface of the washed fabric will produce a layer of soft frost-like fluff, and then some softener will be added to make the washed fabric soft, thus improving the comfort of wearing.
In short, different processing methods will make denim fabrics have different appearance and feel characteristics.
3. Physical and chemical properties of pure cotton denim
Good denim fabrics should not have any irritation or other smells, but also pay attention to environmental protection issues. The denim developed and produced by compact spinning not only returns to the traditional style of ring yarn fabric, but also meets the needs of people to return to nature and advocate nature. Moreover, due to the characteristics of less hairiness and high strength on the surface of compact yarn, the surface of denim products is as bright as silk, and the skin contact feeling is better and more comfortable when wearing.
At the same time, with this compact yarn as warp, the sizing rate can be reduced by 50%, and the post-finishing singeing process can be omitted, saving resources and reducing pollution. Physical and chemical finishing or combined finishing will greatly change the appearance style, mechanical characteristics and wearing comfort of denim fabrics. General denim fabrics can be divided into three categories: light, medium and heavy. Light-duty bookends weigh 200-340g/m, medium-duty bookends weigh 340-450g/m, and heavy-duty bookends weigh 450g/m. ..
Advantages and disadvantages of pure cotton denim fabric 3 What fabric is good for jeans?
Mercerized slub denim: It feels comfortable, smooth and shiny, and is one of the top-grade denim fabrics.
All-cotton slub cowboy: thick fabric, many slub yarns and outstanding, good washing effect.
Cotton twill denim: The fabric has clear texture and moderate thickness, which is the most widely used fabric in denim clothing.
Characteristics of denim fabric
Ring spinning denim
With the development and application of new technologies and equipment such as ring spinning with high speed, large package, fine winding and no knot, the shortcomings of short spinning length, low production efficiency and many knots have been solved. The situation that denim yarn is replaced by air-spun yarn is changing rapidly, and ring spun yarn is likely to make a comeback. Because ring spinning denim is superior to air spinning denim in some properties, such as hand feeling, drape, tear strength and so on. And because people return to nature psychologically,
The more important reason that affects the original development of denim style is that the surface of ring spun denim clothing will present a hazy bamboo-like style after polishing and washing, which meets the individual needs of denim clothing today. In addition, slub yarn denim is very popular in the market at present, and ring spinning slubs can spin shorter and denser slubs, which also promotes the development momentum of ring spinning denim.
Slub denim
When slub yarns with different yarn numbers, different slub thicknesses (relative to base yarns), different slub lengths and pitches are designed, and the slub yarns are arranged in single warp direction or single weft direction and warp and weft direction, and are properly arranged with ordinary yarns with the same yarn number or different yarn numbers, various slub denim can be produced.
After washing clothes, various hazy or clear striped jeans can be formed, which is welcomed by personalized consumer groups. In the early days, almost all slub denim used ring spinning slub yarn. Because it can be spun into slub yarn with short length, small pitch and relatively high density, it is easy to form dense embellishment effect.
And mainly in the warp direction. With the development of market consumption demand, warp and weft two-way slub denim is very popular at present, especially the two-way slub denim products with weft elasticity are very popular in domestic and foreign markets. However, as long as the weave structure of some varieties is well designed, a single variety of ring-spun yarn can be used in the warp direction and a proper proportion of slub yarn in the weft direction, and the effect of warp and weft two-way slub cowboy can also be achieved.
Weft elastic denim
With the adoption of spandex elastic yarn, denim varieties have developed into a new field, which can make denim clothing close-fitting and comfortable, and then match with slubs or different colors, making denim products more suitable for fashionable and personalized consumption needs, thus having great development potential. At present, elastic denim is mostly weft elastic,
The elastic elongation is generally 20% ~ 40%, depending on the weave design of the fabric. The smaller the warp and weft tightness on the loom, the greater the elasticity. On the contrary, under the condition of fixed warp weaving tightness, the greater the weft elastic yarn tightness, the smaller the elasticity, and the lower the weft tightness to some extent.
It may even lose its elasticity. In addition, the outstanding problem of the finished fabric of elastic denim is that the weft shrinkage is too large, generally above 10%, and even as high as 20% in some cases. The instability of cloth width brings great difficulties to garment production. The first solution is not to let the elasticity stretch too much in product design.
Generally, 20% ~ 30% is taken, that is, a certain warp and weft tightness is maintained, and the fabric width is greatly shrunk by appropriately increasing the tension during pre-shrinking finishing, so as to obtain a lower residual shrinkage in the weft direction of the finished fabric; Another solution is to heat-set the pre-shrunk elastic denim to obtain a more uniform fabric width, a more stable and lower weft shrinkage rate, and meet the requirements of garment processing and production.
Denim with special color
Because the clothes made of super indigo dyed denim or super indigo dyed denim can get rich and bright colors after sanding and washing, they are widely welcomed by consumers.
"Super indigo" dyed denim has two characteristics: extremely deep dyeing depth and excellent color fastness to rubbing and washing. The former means that the amount of indigo dye dyed on the yarn per unit weight (generally, the dye accounts for% of the dry weight of the yarn, which is called dyeing depth%) is particularly large. For example, the indigo dyeing depth of conventional denim warp is 1% ~ 3%.
However, the dyeing depth of "super indigo" needs to reach more than 4% before it can be called super indigo or super deep indigo. The latter means that "super indigo" dyed jeans need to be washed repeatedly for more than 3 hours, and their color can still reach or exceed the color depth of conventional dyed jeans without washing.
And its color is much brighter than that of conventional dyed denim. For indigo dyed denim, its essence depends on the penetration degree of the dye into the yarn, not the abrasion fastness of the dye itself (the wet abrasion fastness of indigo is only 1), that is, the better the penetration degree, the better the abrasion fastness.
In the past, the so-called "indigo dyeing rapid washing process" actually made indigo dye penetrate into the core of the fiber very shallowly during the yarn dyeing process, so that when denim clothing was ground and washed, a thin layer of dye on the yarn surface was removed, exposing more white yarn cores, which made the color fade quickly, thus achieving the effect of fading immediately after short-time grinding and washing. On the contrary, the dyeing process of "Super Indigo" requires that the dye can penetrate into the core well, so that the denim clothes can get deep and bright color after grinding and washing.
Because the dyeing depth of "super indigo" dyed denim products is more than 60% higher than that of conventional denim dyeing, the indigo concentration of the dyeing solution will also double, even reaching 3 ~ 4g/L, and it is possible to obtain a deeper color. In this way, the viscosity of dye solution increases and the fluidity becomes worse, which affects the permeability of dye leuco.
The color fastness of denim is reduced, which can not meet the requirements of garment production for final depth. Therefore, some enterprises adopt the design of increasing the dyeing depth again, so that the indigo concentration in the dyeing solution increases again, and the permeability becomes worse, forming a vicious circle, and still can not meet the requirements of "super indigo" color. The higher the concentration of indigo in the dye solution,
The heavier the red light and the darker the color, there will be no "super indigo" effect. Therefore, at present, many manufacturers have or are going to reform the dyeing and sizing equipment, and solve this problem by increasing dyeing passes. For example, if the dyeing pass is increased to 8 or even 10, it will not only increase the investment cost and the consumption of dyeing materials, but also increase the operation difficulty.
And the pollution to the environment is increased. A better way to solve this contradiction is to appropriately reduce the dosage of sodium hydrosulfite or caustic soda, especially to control the dosage of caustic soda, so that the PH value of the dye solution is stable between 1 1 ~ 12, the dye uptake is the highest, the color is stable, and at the same time, the dyeing tension of warp yarn is appropriately reduced, so as to obtain a better "super indigo" dyeing effect.
Colour matching denim with indigo as the primary color
In order to increase the color and tone changes of indigo denim varieties, various color matching denim varieties are very popular at present. For example, indigo dye black sulfide, indigo dye grass green sulfide, black green sulfide, blue sulfide and so on. To meet the individual needs of the market. At the same time, denim production enterprises have their own patented new denim varieties to improve market competitiveness. In this regard, attention should be paid to controlling the concentration of mother liquor as much as possible to prevent excessive overflow of dye liquor from causing dye waste and expanding environmental pollution.
Colored (assorted) denim
There are mainly bromoindigo denim and black vulcanized denim, as well as coffee, green, gray, khaki and blue vulcanized denim dyed with sulfide dyes, and a small amount of red, pink and princess denim dyed with Nafto dyes or reactive dyes. Although the production batch is not large, the market demand is urgent.
Often can't meet the demand. The main problem is that the color is not stable enough, the dyeing attention is poor, and the clothing manufacturers are not satisfied. This is of course related to the small production batch and too many colors, but it is difficult, costly and difficult to treat sewage by printing and dyeing sizing machine.
The first solution is to minimize the number of color combinations, try to use two color combinations, no more than three color combinations, or replace them with other stable dye varieties to adapt to the production characteristics of dyeing machines and obtain stable dyeing effects; Secondly, a more thorough solution is to adopt the production process route of large-capacity dyeing and warping of yarns in yarn-dyed factories to produce denim with different colors.
Characteristics of quality jeans
1, genuine jeans use indigo dye, and the fabric is colorless or striped. After stone grinding, it has a bright and bright feeling, slightly red, and the cloth has no obvious dyeing.
2. After stone grinding, the fabric feels soft and the cloth surface is full and fluffy. The hem is ground white, with no grinding marks on the plane and uniform color.
3. The sewing is double-line, the waist is chain sewing, and 2 15/3 strands of pure polyester are used. The sewing is firm and not easy to fall off.
4, metal hook, buckle, card in the gap, the coating without wear, the reverse pad lining cloth, in case of cracking damage.