Effect of blending ratio on the hollow coffee carbon polyester/cotton blended yarn

The effect of blending ratio on the performance of hollow coffee carbon polyester/cotton blended compact siro-spun yarn was investigated. Five blend ratios of hollow coffee carbon polyester/cotton fiber (i.e. 20/80, 35/65, 50/50, 65/35, and 80/20) and polyester/cotton fiber 35/65 were designed, and six groups of 14.6 tex yarn were spun by compact siro. Indices for the performance of the yarn (surface morphology, evenness, hairiness, tensile property, and hydroscopicity) were tested and analyzed. The regression analysis showed the excellent linear relationship between the content of hollow coffee carbon polyester and each performance index was obtained. Cubic curve models were built to comprehensively evaluate the performance of the yarn. The blending effect in these yarns was evaluated using the Hamilton transfer index. The tests results show that with the increase of the content of hollow coffee carbon polyester in the blended yarn, the evenness and tensile properties of the hollow coffee carbon polyester/cotton blended yarn continue to increase, whereas the hairiness index and moisture regain of the yarn gradually decrease. With the change of blending ratio, the transfer index of each fiber in hollow coffee carbon polyester/cotton blended yarn will change. When the content of hollow coffee carbon polyester is more than or equal to 50%, it has the tendency to preferentially distribute inward, whereas the cotton fiber has the tendency to preferentially distribute outward. When the content of hollow coffee carbon polyester is less than 50%, the reverse is true. The comprehensive evaluation value of the yarn performance decreased first and then increased with the increase in the content of hollow coffee carbon polyester.

Simulation of sliver blending and evaluation of blending irregularity

The quality of blended yarn depends on the uniformity of the blending of the multi-component fibers in the yarn, and sliver blending is a process necessary for mixing fibers. The movement of fibers directly affects the distribution and mixing of fibers in the sliver. In this paper, the sliver blending process was simulated, and a method for the evaluation of sliver blending irregularity was proposed. The effects of passages of drawing and blending ratio on the sliver mixing uniformity were studied and verified both by experiment and simulation. The results show that the blending irregularity decreases gradually and tends to be stable with the increase of the passages of blending drawing. The more similar the blending ratio of the two components with approximately equal linear densities, the easier it is for the component fibers to mix evenly in the sliver. The simulation results are in good agreement with the measured values and previous research results. In addition, the blending irregularity of fiber components in the blended sliver can be predicted by the simulation method.

Intelligent manufacturing of color blended yarn: Color matching algorithm and manufacturing process through computer numerically controlled ring spinning system

Yarn-dyed textiles complement digital printing textiles, which hold promise for high production and environmentally friendly energy efficiencies. However, the complicated structures of color-blended yarns lead to unpredictable colors in textile products and become a roadblock to developing nonpollution textile products. In the present work, we propose a framework of intelligent manufacturing of color blended yarn by combining the color prediction algorithm with a self-developed computer numerically controlled (CNC) ring spinning system. The S-N model is used for the prediction of the color blending effect of the ring-spun yarn. The optimized blending ratios of ring-spun yarn are obtained based on the proposed linear model of parameter W. Subsequently, the CNC ring-spinning frame is used to manufacture color-blended yarns, which can configure the constituent fibers in such a way that different sections of yarn exhibit different colors.

Influence of yarn parameters on cotton/kenaf blended yarn characteristics

Spinning kenaf fibers into yarns is challenging due to the stiffness and lack of cohesiveness of the fibers. Alkali treatment is known to remove hemicellulose, wax, and breaks down lignin, reducing stiffness of kenaf fiber and improving its spinnability. Kenaf fibers were treated at percentages of 4% and 6% and blended with cotton fibers at blend ratios of 40:60 and 50:50 prior to a ring spinning process to produce a double ply yarn of 70 tex. Yarn were twisted at three sets of twist. The responses were measured in terms of carding waste percentages and yarn strength. The results showed that the optimized yarn structural parameter is kenaf fiber treated at 6% and with a kenaf/cotton 40/60 blending ratio based on its tenacity and minimum carding waste. ANOVA shows that there is a good interaction effect between NaOH and kenaf/cotton ratio, and NaOH concentration and twist.

Development of jute, cotton and sheep wool blended yarn using cotton spinning system

A large number of farmers are rearing sheep in Bangladesh. Enormous quantity of local sheep wool are wasted due to lack of processing and proper applications. As the consciousness is growing for the use of natural fibre products, this wool can play a significant role. If proper processing technology can be employed in this sector, the natural fibre will be a good resource for us and will meet today’s necessity in all respects of life. Wool is normally collected from sheep by shearing in our country. A total of about 2.5 thousand metric tons of raw wool can be collected from local sheep every year. Therefore, the present experiment was undertaken to know the physico-mechanical properties of blended yarn. Wool and jute were treated with chemicals, washed, dried and opened to form spin able fibre. After that, jute, cotton and wool fibres were turned to blended yarn through cotton processing system. In results, it was observed that 30% wool, 30% jute and 40% cotton fibre 12s blended yarn used for blended yarn production. Therefore, Wool, jute and cotton blended yarn may be a new horizon for developing diversified products. Bangladesh J. of Livestock Res. 21-25: 173-177, 2018

Friele Model of Rotor Spun Multi-Primary-Colour-Blended Yarn

Multi-channel rotor spinning equipment can produce multi-colour mixed yarn by changing the feed speeds of three primary coloured slivers separately. The method realises the mixing of colour fibres during the spinning process, and has the characteristics of high production flexibility, simplicity and quickness. The colour mixing effect and colour blending ratio prediction are important conditions for industrial production. In this paper, two-component and three-component samples were spun with rovings of red, yellow and blue with different blending ratios. A colour model of the rotor spun multi-primary-colour-blended yarn was established based on Friele theory by determining the σ value, which is the model parameter determined by experiments. Two methods were employed to calculate the σ value to improve the accuracy of the model:1. under the condition of all wavelengths and 2. at various wavelengths. The results showed that the model parameters calculated at various wavelengths could better predict the colour of multi-channel rotor spun colour-blended yarn.

Study of a newly structuralized meta-aramid/cotton blended yarn for fabrics with enhanced flame-resistance

This paper presents a study on a newly structuralized meta-aramid/cotton blended yarn for fabrics with enhanced flame-resistance. In this study, a new type of “marl yarn” resembling structure for cotton/aramid yarns was proposed with an aim to lower the flammability of cotton fiber strands within the yarn and thus enhance the flame resistance of the blended yarns and the resultant fabrics. To facilitate the formation of marl yarn structure, a modified device was developed that can be attached to the ring spinning machine for yarn production. Yarn structure was examined and the effects of the blending ratio of aramid/cotton fibers and yarn structure on the yarn flammability and physical properties were investigated. The results showed that a marl-like yarn structure was formed wherein a small amount of meta-aramid fibers were concentrated to form fiber strands, which served as effective fire barriers, hindering the afterflame/afterglow of cotton fibers. The experimental results demonstrated that the marl structured yarn exhibited lower yarn flammability in terms of afterflame, afterglow, damage length and limiting oxygen index (LOI) as well as possessing similar physical properties compared with conventional evenly blended yarn. By using the marl structured yarns developed, meta-aramid/cotton blended woven fabrics were produced and their flammability and physical properties were evaluated. The results showed that the fabrics using the marl structured yarns had a higher minimal flame application time for ignition and LOI as well as a lower flame spread speed than fabrics using evenly blended yarns.