Search

Plastic products are used in large quantities. However, the fact that plastics do not degrade in nature for many years causes environmental pollution. Addressing this issue, the study focuses on recycling the widespread high-density polyethylene (HDPE) plastic waste. In this study, HDPE waste was collected randomly from the environment, mirroring real-world scenarios. Then, the waste was transformed into granules. Afterward, washing and drying processes were carried out. HDPE filaments of different linear densities were successfully produced from the waste plastic granules. Tensile tests revealed that the breaking strength of the filaments from waste plastic was lower than that of virgin HDPE filaments, highlighting the challenges of recycling. Hybrid yarns were formed by twisting the filaments with cotton yarn to improve the mechanical properties of the filaments from waste plastic. Remarkably, statistical analysis demonstrated that the breaking load values of the hybrid yarns from waste plastic were statistically equivalent to those made from virgin polymer. This outcome indicated that the hybrid yarns made from waste HDPE plastic were as strong as those made from virgin HDPE polymer. In addition, both hybrid yarns exhibited a breaking load 36% higher than the reference extra-twisted cotton yarn. The hybrid yarn formation made filaments produced from waste plastic a valuable component of the high-strength hybrid yarn. Overall, this study shows that recycling HDPE plastics can lead to the production of high-strength hybrid yarns, which can contribute to reducing plastic waste pollution. [ABSTRACT FROM AUTHOR]

A paper yarn is recently spotlighted as a new textile material due to its inherent excellent properties such as antibiotic, deodorant, moisture retaining, and absorbency-quick drying properties. However, its poor flexibility and low elongation cause some disadvantages of cut-off and difficulty in tension control in the knitting process. To prevent those disadvantages of the paper yarn, in this study, a production method of hybrid yarn with other synthetic filament yarn was conducted. Four types of the hybrid yarn with paper yarn and polyester and nylon filament yarns were prepared. The maximum breaking stresses of the hybrid yarns were shown at twist number of 600 tpm and 700 tpm of paper/polyester and paper/nylon yarn, respectively. Also there were relatively different morphologies of the hybrid yarns with twist numbers. These facts originated in a stable integration of each single yarn constituting the hybrid yarn. Due to the reinforcing effect of the filament yarn, the hybrid yarn showed an increment in the maximum stress and strain, but a decrease in initial modulus compared to single paper yarn. In addition, irregularity and defective of the hybrid yarn were evaluated with the surface structure of the yarns. The hybrid yarn having maximum breaking stress showed good knitting ability and excellent surface appearance of its knitted fabrics. [ABSTRACT FROM AUTHOR]

Novel antibacterial nanofiber/cotton hybrid yarns was fabricated by an efficient combination of a stepped pyramid stage free surface electrospinning and traditional cotton spinning process. In this study, nanofibers loading as well as the morphology variation of the nanofibers resulted from polymer solution concentration and applied voltage changes were investigated. The results demonstrated that the higher solution concentration led to larger nanofiber diameter, and higher applied voltage increased the loading of nanofibers in the hybrid yarns. Moreover, it was found that resultant nanofiber/cotton hybrid yarns which was contained a small amount of Triclosan, possessed excellent antibacterial activity against both Grampositive Staphylococcus aureus and Gram-negative Escherichia coli bacteria. This novel method is promising for the large scale production of antibacterial nanofiber/cotton hybrid yarns for biomedical and antibacterial textiles applications [ABSTRACT FROM AUTHOR]

Woven Kenaf/Kevlar Hybrid Yarn is the combination of natural and synthetic fibers in the form of thread or yarn. The yarn is weaved to form a fabric type of fiber reinforced material. Then, the fabric is fabricated with epoxy as the resin to form a hybrid composite. For composite fabrication, woven fabric Kenaf/Kevlar hybrid yarn composite was prepared with vacuum bagging hand lay-up method. Woven fabric Kenaf/Kevlar hybrid yarn composite was fabricated with total fiber content of 40 % and 60 % of Epoxy as the matrix. The fiber ratios of Kenaf/Kevlar hybrid yarn were varied in weight fraction of 30/70, 50/50 and 70/30 respectively. The composites of woven fabric Kenaf/Epoxy and woven fabric Kevlar/Epoxy were also fabricated for comparison. The mechanical properties of five (5) samples composites were tested accordingly. Result has shown that of value of strength and modulus woven fabric Kenaf/Kevlar Hybrid Yarn composite was increased when the Kevlar fiber content increased. Therefore, among the hybrid composite samples result showed the woven fabric Kenaf/Kevlar Hybrid Yarn composites with the composition of 30/70 ratio has exhibited the highest energy absorption with 148.8 J which 28 % lower than Kevlar 100 % sample. The finding indicated there is a potential combination of natural fiber with synthetic fiber that can be fabricated as the composite material for the application of high performance product. [ABSTRACT FROM AUTHOR]

Novel woven spacer fabrics based on hybrid yarns are suitable for an efficient fabrication of three-dimensional composite structures in high volume production. In this paper, an innovative manufacturing process with short cycle times and high automatisation is introduced for textile-reinforced thermoplastic spacer structures suited for bending load cases. The different process steps hybrid yarn fabrication, weaving technology for three-dimensional textile preforms and consolidation with unique kinematics and hot pressing technology are described in detail. The bending properties of the manufactured spacer structures are evaluated by means of experiments as well as finite element simulations. Numerical parametric studies are performed in order to validate the influence of manufacturing tolerances on the bending stiffness of the spacer structures. [ABSTRACT FROM AUTHOR]

In this study, electromagnetic shielding characteristics of woven fabrics made of hybrid yarns are investigated. For this purpose, initially the hybrid yarns containing stainless steel wire are produced with hollow spindle covering technique, and then eight different fabric samples are produced using these hybrid yarns. Electromagnetic shielding values of fabric samples are determined by a test set up based on enclosure measurement technique. Measurements are made in the frequency range of 30 MHz-9.93 GHz. Test results show that woven fabric samples investigated in this study have 25-65 dB electromagnetic shielding effectiveness for incident frequency. It was also shown that the direction, density and settlement type of conductive hybrid yarn in fabric structure are important parameters affecting electromagnetic shielding characteristics of woven fabrics. [ABSTRACT FROM AUTHOR]

The present paper reports the impact of thermal treatment on the characteristics of core-sheath type hybrid technical yarns. The core-sheath type hybrid yarns are prepared using DREF-III technology. Polyester and glass multifilaments are used as core components whereas the cotton and polyester staple fibers are the sheath components wrapped around the core filament with different proportions to form a hybrid structure. The thermal treatment is carried out both in dry and in wet state under relaxed condition and the thermal shrinkage, sheath-slipping resistance and tensile and bending properties of hybrid yarns have been studied. Thermal treatment markedly increases the thermal shrinkage and sheath-slipping resistance of hybrid yarns with polyester multifilament in core, but insignificant effect for yarns with glass multifilament in core. Breaking elongation of hybrid yarns with polyester multifilament in core increases with treatment temperature. The hybrid yarns with glass multifilament in core are least affected by thermal treatment. [ABSTRACT FROM AUTHOR]