- US4526326A - Traverse roll for filament yarn cross... - Google Patents.
- Carbon Materials and Manufacturing - Course - NPTEL.
- Meltblown Technology.
- NPTEL: Textile Engineering - Manufactured Fibre Technology.
- Melt Spinning , Dry spinning and Wet Spinning Method.
- PDF References - NPTEL.
- Man made fiber spinning - SlideShare.
- High Performance Polyethylene Fibers - Textile Learner.
- 1.1 Introduction - NPTEL.
- Melt Spinning, Wet Spinning, and Dry-Jet Wet Spinning | Secant Group.
- NptelIitm.
- Drawing, Texturing, Intermingling and Heat setting Process.
- Spinning Geometry of Ring Spinning Machine - Textile News, Apparel News.
US4526326A - Traverse roll for filament yarn cross... - Google Patents.
This ratio decides suitability of a fiber for spinning into yarn, provided, it first meets the fiber length and thickness requirement. The smallest appropriate ratio of fiber length to fiber breadth (thickness) is about 350:1. Ratio less than this indicate a fiber which will not permit twisting of fiber into a yarn structure.
Carbon Materials and Manufacturing - Course - NPTEL.
116102006. Textile Engineering. High Performance and Specialty Fibres. Dr. Manjeet Jassal. Web. IIT Delhi. Select Introduction Classification and Developments Aramids Other rigid rod polymers such as PBZT, PBO, PBI. Melt spun wholly aromatic polyester Manufacturing of carbon fibres Gel Spun pe fibres Thermally resistant fibres Chemically. Melt spinning ↓ Polyester filament produced from spinneret holes (Monofilament, multifilament) ↓ Drawing ↓ Reeling onto a package or Texturization. Polyester is polymers made by a condensation reaction taking place between small molecules, in which the linkage of the molecules occurs through the formation of ester groups.
Meltblown Technology.
The form of viscous liquid. This liquid is them pumped to melt spinning machines. These machines may be single sided or double sided and can have 36/48/64 spinning positions. At each position, the polymer is pumped by a metering pump-which discharges an accurate quantity of polymer per revolution (to control. MELT SPINNING In this process, a polymer is melted and heated to a suitable viscosity for fiber production. The melted polymer is pushed through a spinneret, which is a type of die consisting of several small holes. Each hole produces an individual fiber, and the number of holes on a spinneret defines the number of fibers in the yarn. The melted polymer fibers then passes through a cooling.
NPTEL: Textile Engineering - Manufactured Fibre Technology.
Melt Spinning In this process, a polymer is melted and heated to a suitable viscosity for fiber production. The melted polymer is pushed through a spinneret, which is a type of die consisting of several small holes. Each hole produces an individual fiber, and the number of holes on a spinneret defines the number of fibers in the yarn. In particularly preferred forms, the present invention is embodied in melt-spinning polyamide sheath/core bicomponent fibers at melt-spinning speeds of about 4000 meters per minute or greater, and more preferably about 4500 meters per minute or greater. Most preferably, the sheath is formed of nylon 6,12 while the core is formed of nylon 6. Course layout. Week 1: Introduction to materials and manufacturing, mathematical representation of material properties, introduction to carbon, carbon on the Earth and in outer space, carbon in technology and economy, carbon isotopes, carbon atomic structure and hybridization. Week 2: Diamond, graphite, carbyne and curved carbons.
Melt Spinning , Dry spinning and Wet Spinning Method.
Spin finish are the lubricants which provides surface lubricating, plasticizing and static protection to man-made fiber. A package, bobbin, or bale cannot be made without application of a spin finish. It is applied to the yarn in fluid form just before winding. Objects: To lubricate the filament to control friction To increase cohesion of the yarn. Spinning: • The conversion of polymer into fibre is called spinning. The fibre forming substance is made temporarily fluid, extruded through spinneret and then returned to solid state (by solidification) in fibre form. • Three types of spinning process: - Melt spinning (Synthetic). - Wet spinning. - Dry spinning. 13. Types of Polymerizations. Polymers are macromolecules built up by linking up of large number of smaller molecules termed as monomers. Two main routes are used for synthesis of these macromolecules: -Step growth polymerization (or condensation polymerization) -Chain growth polymerization (also called addition polymerization).
PDF References - NPTEL.
Liquid crystalline state, in a temperature range of 280 °C to 360 °C. The spinning process for these thermotropic copolyesters is similar to the conventional PET melt spinning process. In case of thermotropic liquid crystal polymers the viscosity falls linearly as shear rate increases (even in low shear rate region). Melt spinning 4. Polymer chips are melted at 500-518°F (260-270°C) to form a syrup-like solution. The solution is put in a metal container called a spinneret and forced through its tiny holes, which are usually round, but may be pentagonal or any other shape to produce special fibers. Modules / Lectures Polymerization of important fibre ; Melt spinning ; Solution spinning ; Post-spinning operations ; Published by: National Programme on Technology Enhanced Learning (NPTEL).
Man made fiber spinning - SlideShare.
"Melt spinning" has been defined as "(t)he process in which the fiber-forming substance is melted and extruded into air or other gas, or into a suitable liquid, where it is cooled and solidified,.
High Performance Polyethylene Fibers - Textile Learner.
The pump inlet pressure is lower than the typical fiber spinning/melt blown process. This is important for maintaining product quality.... Source (NPTEL)The National Programme on Technology.
1.1 Introduction - NPTEL.
3,961 The Fibre formation process includes a change in shape, structure, and properties of the thermoplastic polymer. The polymer pellets or granules are fed into an extruder where, through heating, their melting temperature is exceeded. The polymeric melt is then transported, under pressure, to the spinneret.
Melt Spinning, Wet Spinning, and Dry-Jet Wet Spinning | Secant Group.
Spinning Solution With long-chain, flexible polymers the high orientation required can be obtained by drawing up to a very high draw ratio (50-100 times). Melt processed UHMW-PE can be drawn up to five times only, as the interaction between the molecular chains is too high because of the molecular entanglements.
NptelIitm.
Spinning process: In melt spinning, polymer is heated and it melts to form a liquid spinning solution or dope. Chips of polymers are fed to a hopper which is heated. There is a grid (sieve) at the base which permits only molten liquid to pass through. Then the solution is purified by filter. Turn the spinning width, should be as close as possible to spinning triangle width to minimize high loss of fiber, minimize hairiness in the yarn. In Compact Ring Spinning system, the width of spinning triangle get reduces the integration of edge fibers in yarn cross section increases. For any queries regarding the NPTEL website, availability of courses or issues in accessing courses, please contact. NPTEL Administrator, IC & SR, 3rd floor IIT Madras, Chennai - 600036 Tel (044) 2257 5905, (044) 2257 5908, 9363218521 (Mon-Fri 9am-6pm) Email.
Drawing, Texturing, Intermingling and Heat setting Process.
(c) Melt Spinning Melt spinning lines. Slow speed spinning, stress induced crystallization in high speed melt spinning. Characteristic features of PET, polyamide and polypropylene melt-spinning. Spin finish and its components. (d) Solution spinning Wet and dry solution spinning processes.
Spinning Geometry of Ring Spinning Machine - Textile News, Apparel News.
Electrospinning, derived from "electrostatic spinning," is a method that uses electric force to draw charged threads from polymer solutions or polymer melts up to fiber, where the diameters of the fibers can be hundreds of nanometers. Filamentyarn: in the spinning of manufactured filaments, fiber-forming substances in the plastic or molten state, or in solution, are forced through the fine orifices in a metallic plate called a spinneret, or jet, at a controlled solidified filaments are drawn-off by rotating rolls, or godets, and wound onto bobbins or are.
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