Draw Texturing Yarn Draw texturing yarns are a type of […]
Draw Texturing Yarn
Draw texturing yarns are a type of textile yarn that is characterized by low filamentation, increased tensile strength, and decreased tension. The draw ratio can be adjusted to minimize filamentation, thereby enhancing the fabric's tensile properties. Higher draw levels can reduce filamentation to 0.4 or 10 percent.
Draw texturing yarn is a highly versatile textile fibre used in the construction of fabrics. It is produced by drawing and simultaneously twisting polyester multifilaments. It has a cotton-like crimp and is suitable for both inner and outer garments. It is produced on modern texturising machines. This fabric fibre is available in a range of colours and can be woven into many different types of fabrics.
Draw texturing yarn is not as strong as lagged operation yarn but has better shape definition in the final fabric. It is used in fabrics requiring superior shape definition and a high degree of tensile strength. The yarn can be drawn to a range of tenacities up to 4.0 gpd. However, higher tenacities require modifying the feed stock.
The bending rigidity of draw texturing yarn is a function of the number of filaments in the fabric. A coarser filament will have a higher bending rigidity than a finer filament, which is why the bending rigidity of yarn F4 will be lower than that of yarn S3. The higher the bending rigidity, the larger the loops will be during texturing. On the other hand, a finer filament will form smaller loops and be more resilient during deformation.
Properties of textured yarn
Textured yarn is characterized by the presence of various loops on its surface. Several parameters affect the texture of textured yarn, such as the texturing temperature. Loop density is one of them. The number of loops on the surface of the textured yarn depends on the density of the yarn's fibres.
In this study, we investigated the effect of the commercial packaging structure on the properties of textured yarn. We tested textured yarns with varying levels of fineness and elongation and at three different levels of false twist. We found that the tensile strength decreased with an increase in pre-twist. Further, we found that independent increases in the supply-yarn overfeed and the applied air-pressure increased the percentage of elongation at break. These results were then interpreted in light of the bulking mechanism.
Textured yarns produced by air-jet and steam-jet technology have different properties. Steam-jet textured yarns, for example, have a higher loop density than air-jet textured yarns. Steam-jet texturing uses extra filaments to increase the density of the loops. Air-jet textured yarns, on the other hand, have smaller loops.
Effect of draw ratio on tensile properties
The effect of draw ratio on the tensile properties of yarn can be evaluated by comparing the denier of the drawn yarn with the denier of the filament. The denier of the filament decreases when the draw ratio is increased. The draw ratio decreases when the filaments are stretched.
This study was conducted to assess the effect of draw ratio on the tensile properties of PLA yarns. Researchers found that adding 10% of rosin to PLA reduced its tenacity and breaking elongation by 12% and 5%, respectively. The reduction in mechanical properties was attributed to the lack of molecular orientation. The study also found that PLA with 10% rosin has a plasticizing effect and thus decreased its tensile properties.
Using a microcontroller system and developed positive feed drive, the draw ratio of elastic core yarns was varied from 2.7 to 4.41. In addition, the positioning of the elastic core was changed with a standard V-groove guide roller. The physical properties of the produced yarns were compared and a three-fourths draw ratio produced the best elastic core-spun yarn in terms of tensile and elongation and minimum S3 hairiness.