Development of colored cotton far-infrared polypropylene shirt fabric

Abstract: This article briefly introduces the characteristics of the raw materials of colored cotton and far-infrared polypropylene, explores the production process of shirts blended with colored cotton and far-infrared polypropylene, and analyzes the key factors and solutions that affect production and quality.

Keywords: Natural colored cotton; far infrared ray; polypropylene fiber; technology; spinning; weaving , in the deep processing of colored cotton textiles, there is no need for traditional techniques such as artificial coloring, bleaching, dyeing and finishing, which eliminates environmental pollution caused by the use of dyes. It is recognized as a purely natural and pollution-free green ecological textile. Domestic and foreign scientists have used genetically modified engineering technology to gradually adapt the color, quality, type and production of colored cotton to the requirements of the modern textile industry. The selling price of its products can be three to five times that of ordinary dyed products, and it has irreplaceable advantages in terms of economic and social benefits that other textiles cannot replace. According to the International Council of Organic Agriculture’s prediction, in the next 30 years, 30% of total cotton production will be replaced by green ecological cotton.
Our company has developed color cotton far -infrared proparprin shirt fabrics through market adjustment of outer pallon (PP) as raw materials. The product specifications are CJ/PP 283 119.4.

1 Raw material performance index
1.1 Colored cotton
The color grade is brown 129; breaking length 26.14 km; single fiber strength 3.63 cN; maturity coefficient 1.62; short staple rate 12.2%; cotton defects 44 grains/5 g ; 11.2 neps/5 g.
1.2 Far -infrared propelion (PP)
Specifications 1.65 DTEX × 38 mm; fracture extension 50.19%; broken strength 3.41 CN; 5.0 × 107 · cm than resistors.
2 process process (represented by machine model)
2.1 Textiles

2.2 Organization Department

3 Key technical points of each process
3.1 Spinning Department Easy to be damaged, the cotton net on the cotton machine is automatically broken, and we cannot produce normally. To this end, we have taken the following measures:
(1) Far infrared proprion bags enter the workshop 24 hours ahead to balance the temperature and humidity of the workshop;
(2) After opening the package, spray 10% antistatic agent solution on the surface of the far-infrared polypropylene fiber package. The water temperature should be controlled at about 40°C. The sprayed polypropylene fiber must be manually mixed evenly;
(3) Use The chemical fiber packaging leather is made into a cotton roll cover, and each cotton roll must be tightly wrapped to maintain a stable moisture regain and prevent the polypropylene roll from being broken; is 400 r/min.
3.1.2 Comb cotton
Change the cotton peeling cotton to Monatroger to peel the cotton, which can reduce the Sa’s dried 5 percentage points. At the same time Carding adopts a close-gauge, slow-speed process to reduce fiber damage.
The carding process parameters are shown in Table 1.

3.1.3 Drawing
The drawing process adopts the design of small drafting in the first drawing, drafting ratio in the rear area of 1.7~1.8 times, drafting in the rear area of the second drawing 1.3 times, and drafting 1.3 times in the third drawing to improve drawing. Dry. There are three upper and lower pressure rods in the drafting shape, pneumatic pressurization, and three mixing steps to ensure uniformity. The drawing process parameters and quality data are shown in Table 2.

3.1.4 Roving
Adopt the process design of “large spacing in the rear area and centralized control” to ensure the roughness and quality data are shown in Table 3.

3.1.5 Spinning yarn
The spun yarn adopts heavy pressure, large spacing and small drafting in the rear area, and the use of soft rubber rollers and other technological measures. The process parameters are shown in Table 4.

3.2 ORGANIZATION
3.2.1 “Color Meridian”
Since the colored cotton itself has a lot of neps and impurities, the Auto-coner238 automatic winding machine was selected to remove thick spots, details and large neps to the maximum extent, while appropriately reducing the vehicle speed. The line speed of the original white cotton yarn of the same size is reduced from 1100 m/min to 1000 m/min to reduce the generation of hairiness. The parameter settings of the electronic yarn clearer are shown in Table 5.

3.2.2 Warping
The weight of the tension ring is set to be 1 g less than that of the same type of white cotton, ensuring sensitive automatic stop of end breakage and accurate and timely replacement of the replacement end. Tension ring weight: front 6g, middle 5g, rear 4g.
3.2.3 Sizing
Due to the unstable pigments of natural colored cotton, the pigments will change when encountering acids, alkalis and strong oxidants. In addition, no harmful substances can be produced during the sizing process to ensure that colored cotton textile processing “Green” environmental protection in the process. Therefore, the slurry formula is formulated in Table 6.

This variety has high density, fine yarn number, more yarn hairiness, and large coverage coefficient. In order to ensure the quality of sizing yarn, the process principle of “high density, low tension, and covering and penetration is taken into account” is adopted to achieve strong and stretch-proof , the purpose of adhering to hairiness. The sizing process indicators are shown in Table 7

3.2.4 Weaving process
Measures:
(1) In view of the large warp density of this variety, the warp yarns are easily entangled with each other after warp breakage. The weaving adopts a low back beam process to lower the warp stop frame and adjust the warp breakage. For the car closing device, two dovetail grooves are processed on O14, and the groove angle is also processed on L1, making the car closing more sensitive and effective;
(2) Adjust the let-off and take-up mechanisms, and use double cloth guide rollers to increase Surround the angle, and cover one of the cloth guide rollers with rubber to increase the friction on the cloth surface and reduce the sliding of the cloth surface; The device and the needle closing machine must be sensitive and the induction device specifications must be accurate. The weaving process is shown in Table 8.

4 Product Quality
The yarn quality of CJ/PP 14.6 tex is shown in Table 9. The physical index test results of gray fabric are shown in Table 10.

Through the implementation of several key measures, the clarity of weaving openings has been improved, defects such as warp adhesion and “three jumps” have been reduced, and the difficulty in rolling cloth caused by the tightness of the fabric has been overcome. After tracking tests, the weaving The warp yarn breakage rate is controlled at 0.35 yarns/machine·h, the weft yarn breakage rate is controlled at 0.25 yarns/machine·h, the weaving efficiency reaches 87%, and the first-class rate of gray fabrics off the machine reaches 85%.
5 End Sword
Through the development of the product, summarizing the pre -treatment of far -infrared proprceline is the key to the entire production. Facing the current increasingly fierce competition in white cotton products, the development of colored cotton products is undoubtedly a new economic growth point. Currently, our company is preparing to pass the “Green Passport” ISO14000 system certification for this product and obtain the “Ecological Textile Standard 100” (OKO-TEX100) authorization provides effective technical support for expanding product exports.

Source: “China Textile Network”

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