Acetate acetate is also known as cellulose acetate, which is cellulose acetate. A rayon fiber obtained by esterification of cellulose acetate with acetic acid and cellulose as raw materials. The structural formula can be expressed as: (C6H7O2) (OOCCH3) 3n.
The classified acetate fibers are classified into two types of acetate fibers and triacetate fibers. Usually, the acetate fiber refers to the type II acetate fiber. It is a kind of man-made fiber, generally made of refined cotton linters as raw material to make cellulose triacetate, dissolved in dichloromethane to form a silk-like solution and formed by dry spinning, good light resistance and poor dyeing performance. It is generally made into short fibers and can be used as artificial hair. It can also be made into strong acetate fiber.
The use of acetate fiber is not easy to catch fire, and can be used for the manufacture of textiles, cigarette filters, film bases, plastic products, and the like. At present, in the United States, Europe, and Asian countries, the fabric of acetate yarn is widely favored by consumers. The product is applied in weaving all kinds of high-grade clothing, casual wear, pajamas, underwear, wedding dresses and linings, and the effect is very good. In terms of satin fabrics, festive ribbons and embroidered primers, the properties of acetic acid yarns are also fully revealed.
performance
1. Physical and mechanical properties of acetate fiber The density of acetate fiber is smaller than that of viscose fiber, and it is close to polyester; the strength is the lowest among the three fibers, and the strength loss in wet state is large, and the residual strength is about dry. The strong 70% is similar to the wet strength of the viscose. Therefore, a gentle manner must be taken in the stretching and wet processing of acetate fibers. However, the elongation at break of acetate fibers is higher than that of viscose, and the elongation in wet state is greater. Therefore, the elasticity of acetate fiber is relatively good, similar to silk and wool. Boiling water shrinkage is low, but high temperature treatment will affect the strength and gloss of the fiber, so the temperature should not exceed 85 °C. The moisture regain is lower than viscose, but much higher than polyester, between viscose and polyester. That is to say, the acetate fiber has both a certain water absorption property and a quick release property after water absorption. The softening temperature and melting point of acetate fiber are similar to those of polyester, and have similar thermal properties to synthetic fibers; dry heat treatment under relaxed conditions does not affect fiber properties. Cultural shirt design 2. Chemical properties of acetate fiber Acetate fiber has good acid resistance stability. Common sulfuric acid, hydrochloric acid and nitric acid do not affect the strength, gloss and elongation of the fiber within a certain concentration range; Concentrated sulfuric acid, concentrated hydrochloric acid, concentrated nitric acid. Acetate fiber is very sensitive to alkaline agents, especially diacetate fiber. After encountering strong alkali, it is prone to deacetylation, and the blank t-shirt causes weight loss, and the strength and modulus also decrease. Therefore, the solution of the cellulose acetate solution should not have a pH of more than 7.0. It has strong chlorine bleaching resistance under standard washing conditions and can also be dry cleaned with tetrachloroethylene.
3. Dyeing properties of acetate fiber Although acetate fiber is derived from cellulose, in the esterification process, a large part of the polar hydroxyl group on the cellulose glucose ring is replaced by an acetyl group to form an ester. Therefore, dyes commonly used for cellulose fiber dyeing are used. There is almost no affinity for acetate fiber and it is difficult to dye. Theoretically, after the cellulose acetate is partially saponified to reduce the original hydroxyl group, it can also be dyed with a direct, active dye. However, this is not feasible. In addition, since the carbonyl oxygen atom and the residual hydroxyl group on the cellulose acetate have a certain amount of negative charge, it has been experimentally dyed with a cationic dye for the diacetate fiber, but the results show that only the light color can be dyed. The dyeing properties of acetate fiber are similar to those of polyester or nylon. Only the finely dispersed water-insoluble dye can enter the inside of the acetate fiber under a certain temperature and dye the fiber. The most suitable dyes for acetate fibers are disperse dyes of low molecular weight and similar dye dyeing rates. In fact, the birth of the first disperse dye was also due to the need for cellulose acetate dyeing. The acetate fiber or fabric dyed with the disperse dye has bright and bright color, good leveling effect, high dye exhaustion rate, high color fastness and complete chromatogram. The dyeing process of the acetate shirt manufacturer's acetate fiber has a great influence on the dyeing effect, especially the temperature control. The temperature is low, which is easy to cause dyeing. If the temperature is high, the dyeing will be uneven due to the excessive dyeing. The following dyeing process is given for the acetate fabric produced by it:
Additives: 0.33 g/L of chelating agent at 27 ° C, 0.08 g / L of sodium dihydrogen phosphate, 0.07 g / L of anionic detergent;
pH: 6.5 ~ 7.0
Temperature: 71 ° C added dye, slowly warmed to 82 ~ 88 ° C Dyeing time: 60 min
Draining, cleaning the blend of acetate fiber and various natural fibers or rayon fibers can be cross-linked, that is, a two-color effect is produced in one bath dyeing. For acetate soft textiles, it should be dyed on a wide-width jigger or a normal-pressure warp beam dyeing machine to reduce the fabric. The cellulose acetate is derived from nature, and has a special property of a man-made fiber, whether it is separate. Used or blended with other natural, synthetic, synthetic yarns or fibers, it is a fabric that imparts aesthetics, practicality and comfort to the garment. The custom-made acetate yarn of the cultural shirt can also give the fabric the following characteristics:
- natural luxury
- silky feeling
- comfortable
- elegant drape
- breathability
- Reduce allergic reactions
- biological decomposition
-The color is bright and not easy to fade
- cross dyeing
-stable structure
3. Use of Cellulose Acetate in Lining According to the statistics of GAMA (Global Cellulose Cellulose Manufacturing Association), more than 40% of the cellulose acetate consumption in the world is used in the lining. This is because cellulose acetate increases the value and quality of the lining. The value of cellulose acetate used in the lining includes: Wuhan advertising shirt
a Improve the appearance of the interior of the garment
- Covering clothing interior accessories (pad shoulders, cords, welts)
- Hide sewing details (seam, loose thread)
- Increase fashion and luxury
b Improve the comfort of the wearer
- Help the garment "breath" by providing a moisture absorbing layer
- Rough and hairy fabrics use this lining to add a smooth feel
- Allows the wearer to stretch easily
c enhance the drape of the garment
- Eliminate static adsorption to make the garment sagging naturally
- Take away the moisture and greasy oil that makes the fabric absorb the body
- Resist the external force to make the garment shape
d extend the life of apparel fabrics
- good anti-fouling performance
-Good resistance to external forces
e Increase visual and thermal isolation
- Eliminate the sense of perspective
-Add a warm layer
f feel
- soft, smooth, dry, creping, elastic
g comfort
- Breathable, hygroscopic, fast drying, no static, no adsorption
- drape
- Apparel attire, good drape
h color
-The color fastness is required to meet the printing of bright colors and artistic patterns.
i gloss
- Forming a special appearance under sunlight reflection Acetate is also environmentally friendly because it is made from wood pulp that is reforested. The use of cellulose acetate in apparel for apparel has been used for many years in cellulose acetate, but it has become very popular as people's interest in the use of synthetic fibers in clothing has increased.
The main end customers of cellulose acetate in the apparel industry are concentrated in women's wear. The use of cellulose acetate in the apparel industry began in the 1960s, when cellulose acetate was mainly used in blending with silk to increase strength and reduce costs. In the late 1970s, cellulose acetate was used to blend with viscose fibers to produce the famous "CADY", a dry-feeling crepe, mainly used for formal dresses.
Today, cellulose acetate can be used in almost all apparel fabrics, from high-end ready-to-wear to high-end fashion. It is used to blend with natural fibers, synthetic or synthetic fibers or yarns to produce countless woven fabrics such as Chinese crepe, georgette, satin, Shandong silk, gabardine, and velvet. Also in knitwear, there is a finely textured acetate polyamide knitwear, joined with Lycra's stretch knit fabric and stretch jacquard fabric. Designers chose these fabrics because of their hand feel, excellent drape, comfort, gloss and more. Its main purposes: evening dresses, dresses, bridal gowns, daily clothing and so on.
Cellulose acetate can decorate people from head to toe. Throughout the designer's clothing line, we can easily find out how it can be used and where it is used.
Cellulose acetate has a natural soft luster, which absorbs all kinds of colors perfectly, and gives the fabrics a beautiful quality company to promote the promotion of the cultural shirt, so that the fabric can achieve different effects: flash, rough, bright, bump and so on.
Cellulose acetate and knitted fabrics, due to the special properties (drapability, coolness, comfort) of acetate yarns and some properties (thrustiness, elasticity) of other yarns, make it an untreated yarn or a dyed yarn, Pure spinning or blending with other natural and synthetic yarns has been a huge success in the knitting industry.
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