Composite Functional Finishing Of Yarn Dyed Fabric

On the CVC dyed fabric, three kinds of functional auxiliaries, such as UV resistance, moisture absorption, sweat relief and antibacterial, are applied through finishing technology, so that the fabric has the performance of high-grade products and the added value of fabrics.

Key words: collation; Functionality Yarn dyed fabric

1 Preface

In the past thirty years, China's textile industry has made rapid progress. With the increase of the consumption level of consumers, the requirements for the variety, quality, style and functionality of printing and dyeing products have undergone rapid changes. As the textile market tends to oversupply, the seller's market has become increasingly competitive. In order to meet the needs of market competition, enterprises are required to deep processing, fine processing, small batch, multi variety, fast delivery, and strengthen the development of functional textiles. In the current textiles, the proportion of the market share of the yarn dyed fabric is higher and higher, and more and more functional products are developed. For example, ironing, antibacterial, anti ultraviolet, hydrophilic finishing, skin care, heat storage, fire retardant, antistatic and so on, some of them are directly added auxiliaries in the fibers to form functionalization, some of them are functional through finishing technology. However, in general, the products of single function are quite numerous, but there are still less than three kinds of fabrics with more than one function. Our company is a manufacturer of high-end shirts. It has been committed to the development of functional products. It also gives people a sense of comfort in a shirt to prevent ultraviolet and bacterial invasion, and this kind of wearability can be very attractive to consumers.

2 on UV resistance, moisture absorption, perspiration and antibacterial activity

2.1 ultraviolet rays are usually divided into UV-A (400-320nm) and UV-B (320-280nm). If these two bands are irradiated too much, the melanin will increase and the skin will be aging. It will also cause blister, erythema and even skin cancer. With the progress of society and the scientization of life, people's demand for clothes has shifted to comfort and functional health care. UV protection finishing has two kinds of ultraviolet absorption and UV shielding. Commonly used UV absorbers include benzophenone and benzo three azole, which absorb light energy into heat energy. UV shielding agents have ZnO, TiO2, which have higher refractive index and UV shielding can reach 84%-89%. Here I use CLARIANT company's reactive UV resistant agent RAYOSAN C, RAYOSAN P, which can be firmly combined with fiber and washable, while ZnO, TiO2 and fiber need adhesives, and adhesives have a serious effect on moisture absorption and perspiration, so they can not be used.

2.2 the moisture absorption and perspiration products have springing up in recent years. Fiber type products such as DuPont Co's COOLMAX, instrument and chemical fiber COOLBEST, these fibers change the surface shape of the fibers, so that moisture can be transmitted quickly, and the comfort of human body is increased. And through the finishing technology, the comfort is added to the fiber with a layer of hydrophilic substances, such as CLARIANT company, CIBA company and 3M company have better products.

2.3 antimicrobial agents can be classified into organic silicon quaternary ammonium salts, organosilicon, chlorobenzimidazole, guanidine, halogenated phenyl ether, chitosan and silver ions. The existing antibacterial finishing range is very wide, and the way of action with microorganism is: action with cell membrane, in the process of metabolism, or in core material. Oxidants such as formaldehyde, halogen, and peroxide attack the cell membrane of bacteria first, or penetrate the cytoplasm, acting on their enzymes. Fatty alcohol as a coagulant makes the protein structure of microorganisms irreversible. The deacetylated chitin protonated amino group can bind to the cell surface of negatively charged bacteria and bacteriostasis. In the quaternary ammonium salts, guanidine has special characteristics of polycation, porosity and absorbability. When applied to textile fibers, these antibacterial agents combine with the cell membrane of the microorganism, causing the structure of the oil soluble glycosylate to break, resulting in the rupture of the cell membrane. Silver compounds are due to complexation to prevent microbial metabolism.

For the above three kinds of finishing, their properties are different, their ionic properties are different, and their reaction mechanisms on fiber are different. Therefore, it is very important to make the process and select suitable auxiliaries to interfere with each other so as to give full play to their respective functions.

3 test materials

CVC (55/45) 45 x 45110 x 8045 x 45120 * 8045 * 45130 * 80

Anti UV additives: CLARIANT company RAYOSAN C RAYOSAN P SANDOTOR HV SANITIZED T9620

4 test method

UV resistance was tested according to AS/NZS 4399 standard, and ultraviolet protection factor UPF was used to characterize the UV protection function of fabric.

Moisture absorption and perspiration: the height of the 30 minute cloth climbing, the time when the water droplet is completely dispersed on the cloth surface, and the remaining water of 30 minutes 25 * C.

Antibacterial properties: AATCC TEST METHOD 100 using strain SN 195920 Staphylococcus aureus ATCC 6538

5 process flow

Singeing, desizing, mercerizing, mercerizing, feeding (anti ultraviolet), baking (150 * C 3MIN), water washing, stretching (eating moisture absorption, perspiration, antibacterial material), baking (150 * C 3MIN), pre shrinking.

Formula: anti ultraviolet: RAYOSAN C 10-40G/L; RAYOSAN P 10-40G/L

Moisture absorption, perspiration, antibacterial bathing: SANITIZED T9620 10-40G/L; SANDOTOR HV 10-40G/L

Rolling rate 70%

6 production points:

6.1 desizing should be clean to prevent the residual substances on the cloth from affecting the auxiliaries.

6.2 mercerization needs to be increased. Cloth cover Gloss;

6.3 before finishing, advanced anti UV finishing, wash thoroughly, remove the unreactive auxiliaries, keep the cloth neutral, and prepare for the finishing.

6.4 the compatibility of two auxiliaries with different properties must be considered. In practice, UV shielding agent ZnO and TiO2 have great influence on hydrophilicity and can not be used. 6.5 the antibacterial agent has many cations. In fact, the non-ionic SANITIZED T9620 has the best effect. SANDOTOR HV has good bath stability and good hand feel.

6.6 baking time is also very important, otherwise the washability is poor.

7 results and discussion

7.1 the impact of UV resistant fabric structure

As long as the number of viable and untreated fabrics can be reduced by more than 1000 times, the fabric has better antibacterial properties, that is, the logarithmic reduction difference is more than 3. When the concentration exceeds 20G/L, the antibacterial effect increases little. Therefore, the concentration of 20G/L is better. There is no uniform standard for moisture absorption and perspiration. Generally speaking, the hydrophilicity is less than 5 seconds, the gross efficiency is greater than 7.5CM, and the residual moisture is less than 9%. It has better function. From the test data, HV 20G/L has good performance.

8 conclusion

8.1 for Fabric The key to compound function finishing is the selection of auxiliaries, and compatibility and interference reduction should be considered.

8.2 in the ordinary CVC fabric, the best technology for UV resistance + moisture absorption, perspiration, and antibacterial three in one finishing is: first, the anti rolling material is RAYOSAN C 20G/L, RAYOSAN P 20G/L, the rolling rate is 70%, and the curing is 150 * C 3 minutes. After washing, the moisture absorption and sweat perspiration and the antibacterial material SANITIZED T9620 20G/L are obtained, the rate of the rolling is 70%, and the curing rate is 150 * 3 minutes. After finishing, the fabric has good antibacterial, hydrophilic, sweat perspiration, anti ultraviolet effect and excellent handle.

Reference:

[1] Liu Weijin et al. Cotton fabric UV protection finishing. Printing and dyeing, 2004, 17 (30):37-39

[2] Yang Dong Liang. Review and Prospect of finishing technology in China in the past thirty years. Printing and dyeing, 2005, 9 (31):31-33

[3] Wang Wen Li, et al. New development of functional textile finishing agents. Academic Conference on functional materials and their applications in China, 2004, September 16th