Synthetic fiber

Short Questions 1.1 Fibers can be divided into 2 main categories: Manufactured fibers (Synthetic fibers and Regenerated fibers) and Natural fibers, but a fiber has still the same composition in both: A fiber is a material that is hair-like, longer than it is wide and fibers can be identified by their flexibility and being able to be spun into yarn or made into fabrics. 1.2 Staple fibers can be defined as natural fibers that can be twisted to form properties of yarn. Staple fibers are popular…

take the place of several layers. The warmth of the duvet depends upon the filling and construction of the duvets. The duvets are filled with material which is capable of high insulation. The filling of the duvet can be down, feathers, silk or the synthetic filling. Duvets VS the comforters: People often think that the duvets and comforters are similar type of…

Fibers are everywhere in everyone. Fibers are threadlike elements from fabric or other materials such as carpet. They are mostly identifiable under a microscope, Fabrics are helpful in forensics in many ways. Fabrics are made fiber strands that are much longer than they are wide and generally round on cross section. These fibers may be from natural or synthetic sources.The main reason why fabrics are helpful is because fibers are in clothing,upholstery, carpet, rope, and building components.…

Kevlar Kevlar (poly para-phenylene terephthalamide) is a registered trademark for para-aromatic polyamide synthetic fiber that contains polymer (multiple chain bonds) which makes it extremely strong. It is flexible, light, and thermal stability allowing this unique synthetic fiber to be used in advanced technology applications such as bulletproof materials. Invention The invention of Kevlar® was developed in 1965 by a chemist, Stephanie Kwolek. Kwolek made the breakthrough while working at…

The first synthetic dye is created in 1907 by Eugene Schuller which is a founder of L’oreal.the first home color produced was introduce by firm Schwarzkopf a German cosmetics in 1947.now a days poly color hair dyeing is a multibillion dullar industry that involves the use of both synthetic and plant derived dyes. Humain hair: Hair fibers consists of the cuticle and cortex some time medulla is also present in the center of hair fiber. hair fibers are about 50-100µm in diameter…

of the Case:Hair and fiber transfer in an abduction case Victim: A young girl Suspects: the mother How the hair of fiber made a connection for the case (what the analysis told them): the girl who was abducted and raped had synthetic fibers similar to those composing the car seat covers, Secondary transfer was indicated by dyed brown human head-type hairs. With all the hair transfer it lead them to believe it could only have been the mother. Name of the Case: Tiny fibers help big case…

Trace Evidence: Hair & Fibers Analysis Trace Evidence Defined as materials that could be transferred during the commission of a violent crime, trace evidence consists of multiple sources of which include hair, fibers, soil, gunshot residue, among many more. Trace evidence can be transferred between people, objects, or the environment during the commission of a crime (Federal Bureau of Investigation, 2016). This idea is known as the Locard exchange principle which is the idea that whenever…

Society. It sparked his interest in theoretical and experimental chemistry. Shortly after February 6th 1928, Carothers began studying structure and synthesis of polymers. His boss at the time asked him to research acetylene polymers that might lead to synthetic rubber. He began reacting dibasic acids with diols, today known as esterfication. The result was long chains of molecules called polyesters. After many trials Carothers discovered and concluded that the water product was limiting the…

take its total fibre consumption to 14.0 million tonnes by 2005 and its per capita fibre consumption from the 2001 level of 6.0 kg to 8.0 kg. In India, as yet there is no effort to quantify the overall environment impact of wet processing of man-made fibers, especially with respect to chemical components, processing formulations and the effluent produced from the process. It is known that pretreatment of cellulosic textiles is characterized by high consumption of chemicals, water, and energy…

When Kevlar is spun, the resulting fiber has a tensile strength of about 3,620 MPa,[13] and a relative density of 1.44. The polymer owes its high strength to the many inter-chain bonds. These inter-molecular hydrogen bonds form between the carbonyl groups and NH centers. Additional strength is derived from aromatic stacking interactions between adjacent strands. These interactions have a greater influence on Kevlar than the van der Waals interactions and chain length that typically influence the…