Aerodynamic Air Jet For Draw- texturing Air Interlacing Jet Spinning Machine Durable

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  • Air interlacing jets Archives - Heberlein

    2021-8-16 · Air interlacing for coarse single and multiple yarns. The ideal jet for the air interlacing of heavy denier yarns as well as flat filament and textured PA, PES and PP and glass and mineral yarns. Air interlacing. In air interlacing, an air blast is used to physically intermingle individual or multiple yarns with …

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  • China Air Texturing Machine, China Air Texturing Machine ...

    Alibaba.com offers 1,109 air texturing machine products. About 28% of these are textile machine parts, 9% are other textile machines, and 5% are spinning machines. A wide variety of air texturing machine options are available to you, such as yarn, fiber. There are 1,109 air texturing machine …

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  • SIP TEXTILE NOZZLE CO.,LTD - Air Nozzle,,ATY Nozzle ...

    2019-6-18 · Air Texturing ATY Housing for ATY Yarn Production. Texturing Jet Nozzle (ATY) Air Interlacing Nozzle for draw texture machine. View More>> …

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  • Interlacing Jet Nozzle for DTY - Air Nozzle,,ATY Nozzle ...

    High Speed Type.Jet inserts made from special material with high abrasive resistance and strength.High density and stability of interlacing points at high texturing process speed.Yarn suitable for weft yarns with high density and stability of interlacing points.Close Type Interlacing Air JetWidely used for various cone winding machine, high or ...

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  • China Drawing Texturizer, China Drawing Texturizer ...

    China Drawing Texturizer, China Drawing Texturizer Suppliers and Manufacturers Directory - Source a Large Selection of Drawing Texturizer Products at texture powder,texture roller,used texturizing machine from China Alibaba.com

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  • SD (slide) Nozzle

    Air Interlacing Nozzle for draw texture machine DTY JETBODY is used during the cost effective manufacturer and processing of filament yarns during the air covering process.The jet is a modular struction consisting of a qucik release housing which works with an array of different inserts which are easily exchanged.The range of jet inserts covers ...

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  • Air-jet yarn texturing and its nozzles - Textile Today

    2015-3-1 · 1. Introduction. Air-jet texturing is one of the most versatile methods known to convert flat syntheticfilament yarns to textured yarns. Over the years, developments in air jet texturing have been related to the developments in nozzle design. With this development yarns from finer denier to extremely coarse denier can be textured.

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  • China Spinning Jet, China Spinning Jet Manufacturers and ...

    China Spinning Jet, China Spinning Jet Suppliers and Manufacturers Directory - Source a Large Selection of Spinning Jet Products at jet ski,jet water pump,russian a1 jet fuel from China Alibaba.com

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  • DTY-Air Nozzle,,ATY Nozzle,Ceramic Jet cores, Air ...

    2019-6-18 · Name: David Jiang Tel: +86(512)65183841 Fax: +86 (512)-62531686 Mobile: +86-13771978074 E-mail: [email protected] Add: Room 602, FuHuaYuan Building, airport ...

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  • (PDF) Airjet texturing

    Key words air-jet texturing, yarn wetting, inter- filament friction, loop formation and fixation, spin finish The air-jet texturing process produces spun-like yarns by this entrained water, usually adhered to the surface of the modifying the uniform arrangement of the synthetic con- filaments and trapped between them, meets the incoming tinuous ...

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  • SD (slide) Nozzle

    Air Interlacing Nozzle for draw texture machine DTY JETBODY is used during the cost effective manufacturer and processing of filament yarns during the air covering process.The jet is a modular struction consisting of a qucik release housing which works with an array of different inserts which are easily exchanged.The range of jet inserts covers ...

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  • Air texturing, Intermingling, SSM Staehle, Heberlein, Air ...

    2018-3-2 · In its simplest form, the air-texturing machine consists of a supply yarn creel, a suitable winding head fitted with yarn transport including an extra pair of feed rolls and an air jet interposed. Traditionally air-texturing machines fall in two main groups: • Machines with individual drives (SSM Staehle) • Machines having a headstock with

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  • DTY Ceramic Intermingling jets - Air Nozzle,,ATY Nozzle ...

    The Ceramic Interlacing Jet offered by us is manufactured under the strict supervision of our quality controllers, thus ensuring robust design, low air consumption, and long service life. These are custom designed as per the sated specifications of the clients and are suitable for all kind of yarns. These are technologically advanced machine ...

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  • DTY false twisting texturing (FT) Archives - Heberlein

    2021-8-11 · Best interlacing with lowest air consumption. The SlideJet-2T is used in the manufacturing and processing of high value filament yarns in the false-twist texturing process. The jet is a modular system with a universal quick-lock housing and numerous easily replaceable jet inserts with two yarn channels. Air interlacing

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  • RPE Technologies GmbH - COMPANY

    2021-8-16 · RPE Technologies is especially concentrating on the development, engineering, design and marketing of air interlacing jets for tangling, commingling, pre-interlacing and special applications based on customer requirements. The main textile processes are Spinning (POY, FDY, IDY, BCF, etc.), Draw-Texturing, Draw-Winding and Air-Covering of ...

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  • (PDF) Airjet texturing

    Key words air-jet texturing, yarn wetting, inter- filament friction, loop formation and fixation, spin finish The air-jet texturing process produces spun-like yarns by this entrained water, usually adhered to the surface of the modifying the uniform arrangement of the …

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  • Spinning machinery, Air Nozzle, Interlacing Jet trade ...

    Spinning machinery, Air Nozzle, Interlacing Jet trade leads from SIP TEXTILE NOZZLE CO.,LTD. Search Keywords. ... Interlacing Jet nozzle from draw texturizing machine. Copper Air Texturing Nozzle for ATY yarn. Interlacing Jet Nozzle for DTY.

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  • Introduction to intermingling technology

    2014-12-1 · In this technology air causes the filaments will be intertwined and mingled with each other to form a compact section. Intermingling finds applications in while spinning stage, at drawing stage and also at warping. Intermingling jet parameters, Machine parameters, Feed yarn properties affects intermingling process.

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  • ANNEX I - ITMA

    2021-3-1 · 1.6.3 Ring-spinning machines for semi-worsted spinning system 1.6.4 Ring-spinning machines for woollen spinning system 1.6.5 Ring-spinning machines for bast-fibres spinning 1.6.6 Ring-spinning machines for compact spinning 1.6.7 Ring-spinning machines for direct spinning 1.6.8 Rotor spinning machines 1.6.9 Air jet spinning machines

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  • Jet Interlaced Or Intermingled Patents and Patent ...

    2011-2-24 · Abstract: A spliced fiber tow (40) having a uniform density along its entire length is provided. The spliced fiber tow is manufactured by rarefying the ends (22, 32) of the two fiber tow segments to be joined, aligning the rarefied regions (26, 36) and then applying pressurized gas to entangle the filaments in the rarefied regions.

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  • AIR COVERING MACHINE/LYCRA COVERING MACHINE

    Air covering. Air covered yarns (ACY) are produced by combining one or more draw textured filament yarns together with an elastomer yarn like spandex. Both types of yarn run through an intermingling jet, where air pressure will be applied to create interlacing zones. The filament yarns is overfed, entering the jet in a relaxed form, allowing ...

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  • RPE Technologies GmbH - COMPANY

    2021-8-16 · RPE Technologies is especially concentrating on the development, engineering, design and marketing of air interlacing jets for tangling, commingling, pre-interlacing and special applications based on customer requirements. The main textile processes are Spinning (POY, FDY, IDY, BCF, etc.), Draw-Texturing, Draw-Winding and Air-Covering of ...

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  • The Fundamentals of Air-Jet Texturing

    The most widely quoted general description of the process is from Acar [16]. It has been reproduced below. “ When the overfed filaments enter the texturing nozzle, they are carried

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  • Study Textiles Exam 3 Flashcards

    1.Draw texturing—drawing & texturing in one step; faster; cheaper; yarns of equal or better quality. 1.Stuffer box—filaments stuffed into heated box; increases volume 200-300%; widely used method. 1.Air jet—air tangles fiber; increases volume 50-150%; little or no increase in stretch. The direct yarn number.

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  • US6564438B1 - Method for air-bubble texturing endless ...

    A method and machine for treating yarn may include feeding the yarn through both a heat treatment and an air jet texturing nozzle. The texturing nozzle may be supplied with compressed air, producing an air jet with a speed greater than Mach 1 in the yarn channel. The heat treatment may be performed before and/or after feeding the yarn through the texturing nozzle.

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  • Commingled and Air Jet-textured Hybrid Yarns for ...

    2004-4-1 · An Improved Understanding of Modern Techniques for Air Jet Texturing of Continuous Filament Yarns, In: The Proceedings of 4th International Symposium, pp. …

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  • (PDF) Supersonic Jet Texturing of Yarns, 76th Thomas ...

    This lecture will. briefly describe the various texturing processes that use. fluid-jets and will then summarize the ongoing air-jet. texturing research undertaken by Dr Acar at Lough-. borough ...

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  • (PDF) Studies on Air-Jet Texturing of Different Types of ...

    potential yarns, in air-jet texturing has been studied. Using a modified false-twist textured feed yarn for air-jet texturing results, in a yarn of higher bulk, instability, and tenacity but, of ...

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  • difference between air textured yarn and draw textured yarn

    An additional drawing zone using a hot-pin may be placed before the texturing stage, and used to impart irregular and repetitive changes to the filaments, so that after texturing the yarns display light and dark sections when dyed. Air texturing of a yarn is one of the most versatile methods of yarn texturing as it can combine type of filament Yarn together. From here the yarn is fed to Shaft ...

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  • CTE1401 Exam 3 Flashcards

    Start studying CTE1401 Exam 3. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

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  • Parts For Neumag Air Jets Archives - Machine Parts in ...

    Parts For Neumag Air Jets. Products Textile Air Entanglement Parts for NeumagParts For Neumag Air Jets. ... Interlacing Jets. Interlacing Jet Housing; Miscellaneous Parts for Interlacing Jets; Lab Supplies; Metering Pumps. ... Draw Interlacing Jet Type 3. REQUEST A QUOTE. Contact Us (800) 220-9221. [email protected] 2908 N Dug Gap Rd

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  • Air Jet Texturing Nozzles

    2021-7-30 · The air texturing was performed on EMAD-17 air - jet texturing machine with EMAD 150-82 jet nozzle . Properties of core-and-effect air textured yarns blended by diacetate and polyester filaments The air texturing was carried out on EMAD-17 air - jet texturing machine with EMAD 150-82 jet nozzle .

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  • 28-245-Taesin Spinning Line-PP Multi Filament, FDY, Air ...

    28-245-Taesin Spinning Line-PP Multi Filament, FDY (Fully Drawn), Air Textured Polypropylene Yarns ... With Multi Roll Hot Godet Draw Rolls and Air Texturing on each end 16 Thread Lines 8 winders 2 Cops per winder ... Formation Each thread passes through an air interlacing jet. Frequency mode is controlled by air pressure and winding tension.

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  • (PDF) Supersonic Jet Texturing of Yarns, 76th Thomas ...

    This lecture will. briefly describe the various texturing processes that use. fluid-jets and will then summarize the ongoing air-jet. texturing research undertaken by Dr Acar at Lough-. borough ...

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  • difference between air textured yarn and draw textured yarn

    An additional drawing zone using a hot-pin may be placed before the texturing stage, and used to impart irregular and repetitive changes to the filaments, so that after texturing the yarns display light and dark sections when dyed. Air texturing of a yarn is one of the most versatile methods of yarn texturing as it can combine type of filament Yarn together. From here the yarn is fed to Shaft ...

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  • ILJIN Precision Co. - Selling Leads

    2012-1-6 · Selling Leads from ILJIN Precision Co. Sell Air Jet Interlacer 2012.01.06 - The air pressure is normally from 0.8kg to 4.0kg but sometimes increase pressure up to 9kg according to the purpose.

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  • News and Success Stories from the Rieter World

    Aerodynamic Rotor Combo Boosts Productivity. The Aerodynamic Rotor Combo for automatic rotor spinning increases production by up to 6% and reduces yarn breakage by up to 65%. May 27, 2021 - …

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  • Spinning Machines - an overview

    Modern spinning machines, like the Murata air-jet spinning system, incorporate on-line measurement of yarn evenness; several spinning machines are linked to a central computer, enabling the operator to monitor the operation from the console. Downtime due to stoppages is computed, and machine …

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  • ITMA 2007 Exhibitor Technology

    2007-8-9 · small-capacity jet-dyeing machine. Other equipment on display will include the Eco-bloc quattro yarn-dyeing machine and the MPS Colourmatic dyestuff dissolving system. Hall C1, Booth 157/256. Toyota Industries Corp., Japan, will exhibit ring-spinning machines for cotton spinning systems, as well as air-jet weaving machines. Hall B6, Booth 327.

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  • Effect of air-jet texturing on adhesion behaviour of ...

    2008-8-30 · All the air-jet texturing studies were carried out in the Laboratories of Korteks, Turkey on a SSM Stähle RM3T machine with the following parameters: 500. m/min texturing speed, 200 °C heater temperature, Hemajet T341 type of nozzle.. Drawing and air-jet texturing of the feed yarns were performed in one step.

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  • (PDF) Air-jet textured yarns produced under different heat ...

    The opposite trend in phys. bulk and instability was obsd. for yarns produced at const. winding tension on the Eltex AT/HS air-jet texturing machine. Air-jet textured yarns produced at const ...

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  • Effect of air-jet texturing on adhesion behaviour of ...

    An existing air-jet texturing machine was modified to supply either air or steam to the texturing nozzle. Using an identical nozzle, both air-jet and steam-jet textured yarns were manufactured.

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  • Spunlace system AquaJet for nonwovens with 5 m working ...

    Toggle navigation. Quicklinks. Search this site; Contact; Sites and opening hours

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  • Investigation on air texturing process for diacetate ...

    Air and Draw Texturing are then covered, with the Rieter-ICBT AT 8 E2 or 8 E2 AD for air texturing. Structure and yarn count range are described. The Murata range is discussed, and particularly ...

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  • Towards Truly Wearable Systems: Optimizing and Scaling Up ...

    2020-8-21 · MSD can be applied for yarn processing techniques such as drawing, plying, twisting, texturing, spinning, and covering, which can be adapted for TENGs (Lawrence, 2010; Zhang, 2014). For instance, air jet texturing is a method of creating bulky yarns ( Sengupta et al., 1995 ) from synthetic filaments, which significantly enhances their hand feel ...

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  • US3525133A - Intermingling jets for multifilament yarn ...

    US3525133A US3525133DA US3525133A US 3525133 A US3525133 A US 3525133A US 3525133D A US3525133D A US 3525133DA US 3525133 A US3525133 A US 3525133A Authority US United States Prior art keywords intermingling jet gas directed yarn Prior art date 1967-05-10 Legal status (The legal status is an assumption and is not a legal conclusion.

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  • Textile Technology: Bicomponent Effect Yarns and Tabrics ...

    2021-5-28 · Air jet texturing may be conducted by overfeeding the core yarn and effect yarn through an air jet texturing machine at different speeds. Bulking may be conducted using a false twist texturing machine, whereas by modifying the speed of feeding the yarns may alter the …

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  • (PDF) SPUN YARN TECHNOLOGY

    Academia.edu is a platform for academics to share research papers.

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  • US4644620A - Draw texturing and entanglement apparatus

    Apparatus for the effective manufacturing of bulk yarn employing fluid and comprising two assembled blocks of simple geometric form. The apparatus is characterized by a yarn path part having a polygonal cross section which is defined by planes arranged in the yarn-travelling direction. A part of the yarn path part, however, is provided with a fluid-jetting opening and is constructed with a ...

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  • ANNEX I - ITMA

    2021-3-1 · 1.6.3 Ring-spinning machines for semi-worsted spinning system 1.6.4 Ring-spinning machines for woollen spinning system 1.6.5 Ring-spinning machines for bast-fibres spinning 1.6.6 Ring-spinning machines for compact spinning 1.6.7 Ring-spinning machines for direct spinning 1.6.8 Rotor spinning machines 1.6.9 Air jet spinning machines

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  • US3973386A - Process for texturing polyester yarn - Google ...

    A process for draw-texturing polyester yarn which has been melt-spun at high speed. The process is performed on a conventional false-twist texturing machine modified for drawing and for the use of an air-jet texturing device instead of a second heater. The yarn is drawn at 1.3 to 2.0X draw ratio, false-twist textured, and then air-jet textured to provide a yarn having a low boil-off shrinkage ...

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  • Commingled and Air Jet-Textured Hybrid Yarns for ...

    Simultaneous spinning of commingled yarns and their investigation in terms of distribution homogeneity and thermal shrinkage is described in comparison with those intermingled by air jet texturing.

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  • Hybrid yarns for thermoplastic composites - ScienceDirect

    2010-1-1 · Air-jet texturing is a purely mechanical process that can be used to combine reinforcing and matrix-forming filaments. Figure 12.3(a) shows the schematic of the air-jet texturing process, and the structure of the air-textured yarn is shown in Fig. 12.3(b).In this process, supply yarn is overfed in the turbulent zone where compressed air is directed mainly parallel to the yarn path, resulting ...

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  • Fluid Jet Patents and Patent Applications (Class 28/271 ...

    Abstract: The present invention is directed to a draw jet for drawing thermoplastic polymer filaments including a drawing slot defined by an entrance member including a converging passageway communicating with a continuing passageway, terminating at an outlet portion, a drawing member including an inlet portion having a drawing gap width of about 2.0 to about 10 mm communicating with …

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  • Textile Technology: Bicomponent Effect Yarns and Tabrics ...

    2021-5-28 · Air jet texturing may be conducted by overfeeding the core yarn and effect yarn through an air jet texturing machine at different speeds. Bulking may be conducted using a false twist texturing machine, whereas by modifying the speed of feeding the yarns may alter the …

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  • Luftverwirbelung - Englisch-Übersetzung – Linguee

    We carry out trials with customer's yarn in the areas of Taslan® air jet texturing, false-twist texturing, air interlacing and covering and also air splicing. components.oerlikontextile.com ... The package build at the spinning machine is improved through the air interlacing by PolyJet and in the following processes by better package unwinding ...

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  • (PDF) TEXTILE RAW MATERIALS

    Bast Fibers (Flax) 3.1 Introduction Flax claimed to be the first fiber used for making textile, which is commonly known as linen. Linen mummy-cloth was used about 4,500 years ago. From the primeval textile fibers cotton, hemp, sunn, ramie and flax, the fiber …

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  • Machinery Listings

    2016-5-7 · David Giudici RG3 air jet covering machines – 5 pcs YEAR 1992 Air covering machines module construction 36 positions in total HEBERLEIN air jet nozzles: speed of take-up 600 m/min count of yarn 1-268 dtex installed power 15 KW electricity usage 10,5 kW length 18 m weight 3 tons David Giudici RG3-B air jet covering machine – 1 pcs with ...

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  • ANNEX I - ITMA

    2021-3-1 · 1.6.3 Ring-spinning machines for semi-worsted spinning system 1.6.4 Ring-spinning machines for woollen spinning system 1.6.5 Ring-spinning machines for bast-fibres spinning 1.6.6 Ring-spinning machines for compact spinning 1.6.7 Ring-spinning machines for direct spinning 1.6.8 Rotor spinning machines 1.6.9 Air jet spinning machines

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  • Textile Systems - Hochleistungskeramik für Spitzenprodukte

    Texturing yarn production Interlacing intermingling of filament bundels Thread guides for carbon, ceramic and glass fibre processing Thread guides for HPPE like Dyneema and Aramides as Kevlar, Nomex etc. Spinning: stapel fiber yarn: OE: nozzles and rotors air-jet spinning …

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  • Drawing & Texturising Process

    2018-12-5 · • Interlacing of filaments in the jet can cause the loops to be locked into the yarn, so that twist is unnecessary. 12/5/2018 DRAWING & TEXTURISING 39 • Air-jet texturising process is a purely mechanical method that uses a cold air-stream to produce bulked yarns of low extensibility.

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  • A new method to evaluate interlacing yarns

    The proposed approach is proven to be effective and accurate in predicting the yarn interlacing frequency of air-jet nozzles, and also very promising for the design of air-jet interlacing nozzles ...

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  • Determination of Yarn Interlacing Frequency of Triangular ...

    2018-4-24 · A numerical approach to predict the yarn interlacing frequency of triangular interlacing nozzle is discussed in this paper. The inviscid, compressible flow field inside air nozzles is computed thro...

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  • (PDF) The Process Dynamics of Egyptian Cotton G-86 with a ...

    In the present work, Giza 86 cotton (long staple cotton) was used to produce a different fine yarn with counts 14.7, 11.8, 10.5, 9.8, and 7.4tex on both of compact and ring spinning frames. The different yarn properties like, CVm%, tenacity,

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  • Study Textiles Exam 3 Flashcards

    1.Draw texturing—drawing & texturing in one step; faster; cheaper; yarns of equal or better quality. 1.Stuffer box—filaments stuffed into heated box; increases volume 200-300%; widely used method. 1.Air jet—air tangles fiber; increases volume 50-150%; little or no increase in stretch. The direct yarn number.

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  • Textiles: March 2012

    2021-5-5 · AIR JET SPINNING: A spinning system in which yarn is made by wrapping fibers around a core stream of fibers with compressed air. In this process, the fibers are drafted to appropriate sliver size, then fed to the air jet chambers where they are twisted, first in one direction, then in the reverse direction in a second chamber.

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  • Achiever Essays - Your favorite homework help service ...

    Achieveressays.com is the one place where you find help for all types of assignments. We write high quality term papers, sample essays, research papers, dissertations, thesis papers, assignments, book reviews, speeches, book reports, custom web content and business papers.

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  • Abstract - NCSU

    2017-11-14 · machine have been performed. No heat is necessary for air jet texturing and this gives the process the versatility to process any kind of yarn, it may be thermoset, thermoplastic or even short staple fiber yarns. A single position Stähle-Eltex air jet texturing machine was used to process different kind of yarns for air texturing.

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  • BCF processes and yarns - 182.160.97.198:8080

    2019-9-11 · yarn. Even though the newer jet process has been integrated with spinning, it is still necessary to interpose a drawing stage. The heat for drawing is normally provided by heated rolls or godets. 6.2 BCF draw-texturing machine 6.2.1 Layout of the BCF machine Unlike the false-twist texturing machine the integrated process does not

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  • ANNEX I - ITMA

    2021-3-1 · 1.6.3 Ring-spinning machines for semi-worsted spinning system 1.6.4 Ring-spinning machines for woollen spinning system 1.6.5 Ring-spinning machines for bast-fibres spinning 1.6.6 Ring-spinning machines for compact spinning 1.6.7 Ring-spinning machines for direct spinning 1.6.8 Rotor spinning machines 1.6.9 Air jet spinning machines

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  • Draw texturing and entanglement apparatus for yarn ...

    An air or fluid jet apparatus is preferrably employed to obtain these qualities since alternative methods such as twisting or sizing procedures have several disadvantages. If the yarn is sized, it is necessary to wash the textiles fabricated therefrom in order to remove paste. If the yarn is twisted, a twisting machine …

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  • Drawing & Texturising Process

    2018-12-5 · • Interlacing of filaments in the jet can cause the loops to be locked into the yarn, so that twist is unnecessary. 12/5/2018 DRAWING & TEXTURISING 39 • Air-jet texturising process is a purely mechanical method that uses a cold air-stream to produce bulked yarns of low extensibility.

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  • With Other Type Crimping Or Texturing Patents and Patent ...

    Abstract: Method to produce spun-like yarn and product produced thereby by combining a core yarn and an effect yarn in an air jet. The removal speed of the combined yarn from the air jet is intermediate of the speeds of the draw rolls to produce a composite yarn having crunodal loops in …

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  • US3969799A - Turbulence generator for yarn texturing air ...

    This turbulence generator is particularly for use with a yarn texturing air jet of the type having a venturi supported in the exit end of the jet with a yarn guiding needle positioned in the entrance end of the jet and with the space between the venturi and the inner end of the needle defining a turbulence chamber. The turbulence generator is in the form of a tubular extension projecting ...

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  • Spinning Process - an overview

    2021-8-2 · Short spinning (also named compact spinning) characterized by a high velocity of cooling air, a low spinning velocity, and a low draw down ratio. It corresponds thus to a fast crystallization. In short spinning, there are three stages: spinning, drawing, and annealing at a temperature close to the melting temperature (Kohler and McHugh, 2007).

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  • Study Textiles Exam 3 Flashcards

    1.Draw texturing—drawing & texturing in one step; faster; cheaper; yarns of equal or better quality. 1.Stuffer box—filaments stuffed into heated box; increases volume 200-300%; widely used method. 1.Air jet—air tangles fiber; increases volume 50-150%; little or no increase in stretch. The direct yarn number.

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  • yarn processing for exam 2 Flashcards

    are almost always made from manufactured fibers by extruding a polymer solution though a spinneret and solidifying it in fiber form, the grouping of the filaments with the addition of twist creates the filament yarn. the spinning machine winds the yarn on a bobbin. the yarn is …

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