Technically speaking, modification of the cross section of the fibre allows engineering of the surface properties of fibres and fabrics. Polyester are synthetic Fibre, manufactured from petrochemical products by a process is also polymerization. The fibre is then passed through a crinkling machine to create a fluffy texture the most common variety of recycled polyester is understood as repeat, which comes from waste clear plastic bottles rather than raw petrochemicals. The fibre cross sectional shape is also called important variables.
In the manufacture of textile fabrics, for example, stability and chemical resistance, knitted and crocheted fabrics and nonwovens from yarns containing synthetic polymer filaments the high tenacity yarn has a lot of strength, wovenand tolerates extremely hot environment that can stress conventional multi – filaments to their performance limits.
Polymeric high – modulus,chain – extended, high – tenacity fibres have a structure consisting of highly oriented, linear macromolecules. It decomposes at around 450 °C before it melts, and there are few solvents. Para – aramid, PBO and PIPD fibres are made byaromatic polyester, liquid – crystal routes, but HMPE is gel – spun. The polymer fibres is expensive to make and to spin.
It is now recognize that spin finish can lead too incomplete opening . If the fibre contains a high lubricant leveled. The resulting fibre has a febrile texture, but has the necessary highly crystalline, chain extended structure to give high modulus, highly orientedand high tenacity. Fibres generally spin better than with the right finish than without any finish.
