world of nonwovens a presentation by dr. v. k. kothari professor textile technology department...
TRANSCRIPT
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World of Nonwovens
A Presentation by
Dr. V. K. KothariProfessor
Textile Technology DepartmentIndian Institute of Technology Delhi
At TITS Bhiwani on 23.01.2010
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Nonwoven ProductsNonwoven Products
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Hydroentanglement Jets
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Hydroetanglement wire
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Hydroentanglement wire
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Hydroentanglement wire
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Spray bonding
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Engraved rolls
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Auto Air Filteration Auto Air Filteration
• micronAir particle filters,with their higharrestanceMicrofiber nonwovens, protectdriver and passengers of avehicle from pollen, dust, soot and other harmful particlespenetrating inside theircar via the intake airflow.
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• Nonwovens for filteringcoolants and lubricants, aswell as washing, phosphatingand coagulation baths in themetal-processing industry.
Liquid FiltrationLiquid Filtration
• Nonwovens for filtering milk,frying fats, drinking water,and blood plasma.
• Membrane supportnonwovens for filtering fruitjuices, enzymes, electro-dip-coatingand effluents.
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Indoor Climate Control and Air Indoor Climate Control and Air Filtration Filtration
Air filters for intake, exhaustand recirculated air filtrationin indoor climate controlsystems:
filter mats pocket filters activated-carbon combination filters cassette filters HEPA/ULPA filters depth-loading filter cartridges high-temperature filters
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Dust RemovalDust Removal
Filter cartridges, filterplates, filter bags andEcoProtec safety filtersfor industrial dustremoval applications,with high-performancefilter media made ofnonwovens.
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Special FiltrationSpecial Filtration
• Respirators • Vacuum cleaners • Kitchen hood filters • …
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HygieneHygiene
Baby diapers
Incontinence products
Feminine hygiene items
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MedicalMedical
In medical applications,nonwovens offer maximizedlevels of safety and hygiene.They are used in adhesiveplasters, wound pads andcompresses, orthopedicwaddings and stomaproducts.
The nonwovens used heremust, for example, beparticularly absorbent andair-permeable, must not stickto the wound, and also haveto ensure a skin-friendlymicro-climate.
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Furniture/Textile ApplicationsFurniture/Textile Applications
• In furniture/textileapplications, nonwovenssatisfy even the mostdisparate functionalrequirements for producingupholstered furniture,bedware and quiltedproducts, and protectiveclothing.
• Nonwovens here excel interms of their textile look,their air-permeablebreathability, and highabrasion resistance values.
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HorticultureHorticulture
In horticulturalapplications, nonwovensprotect the plantsagainst temperatureextremes by day and bynight, thus creating thefoundation for earlierharvests with excellentresults. They arepermeable to both airand water, UV-stabilized,and resistant to rotting.
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Nonwovens for CablesNonwovens for Cables
Nonwovens for cablebandaging are used in powerand telecommunicationcables. Nonwovens help tokeep the cable fully functionalon a long-term basis evenunder the toughest ofconditions.
Nonwovens act as Water-blocking tapes, as fixing, bedding and thermo-tapes, and in an electricallyconductive versions for Heat-barrier protection.
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Acoustic NonwovensAcoustic Nonwovens
o Optimized noise dampingranks among the mostimportant requirements forthe architects and engineersdesigning modern-day offices,administration buildings,airports and communicationcenters.
o The structure and low weightof acoustic nonwovens offer asignificant advantage inperforated ceiling systemscompared to conventionalsoundproofing materials.
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Composite MaterialsComposite Materials
In the glass-fiber-reinforcedplastic industry, nonwovensare used for surfacingproducts like pipes, tanks,container boards, facadepanels, skis, surfboards andboats. They very substantiallyimprove resistance to bothcorrosion and abrasion, aswell as improving themechanical strength of theproducts.
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Polishing PadsPolishing Pads
Polishing pads are used in themanufacture of semiconductor wafers, memory discs, precisionoptics and metallurgicalcomponents.
The purpose of these pads isto produce a surface finish, interms of planar uniformityand smoothness, that canmeet the highest tolerances.
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Automotive InteriorsAutomotive Interiors
Facings and structuralreinforcement materialsare used in a variety ofdifferent applicationsIncludes:
headliners,
trunkliners,
door trim,
package trays,
sun visors and
seats.
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Window TreatmentsWindow Treatments
► Nonwovens are used indesigner window treatmentfabrics to enhance bothfunction and appearance. ► Their ability to diffuse light,while maintaining roombrightness, enhances thefeeling of privacy and helpsprotect furniture. ► Their natural insulatingqualities provide addedenergy conservation.
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A broad spectrum of
applications including:
- liners, - counterliners, - interliners and - reinforcing materials
In In Shoes..Shoes..
Membranes and insolesensure a healthy footclimate and a highdegree of foot comfort.
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Nonwovens perform
excellently as substratefor coagulates andcoated materials.
Appropriately finishedmaterials are used notonly in shoe andleather goods but also inupholstery and even inthe garment industry.
As As SubstratesSubstrates
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Segment-Pie: Splitting by CardingSegment-Pie: Splitting by Carding
Card-splittable fiber before splitting Card-splittable fiber after carding
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Increased Surface AreaIncreased Surface Area
Evolon is anewly patented,award winning method formanufacturing
Evolon… The Next GenerationEvolon… The Next Generation
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Evolon… The TechnologyEvolon… The Technology
16 Sector PIE ~ 0.1 dtex
2 Sector S/S ~ 1 dtex
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300 Islands-in-the-sea As-spun Fiber300 Islands-in-the-sea As-spun Fiber
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Composite Nonwovens Made From Fibers & Composite Nonwovens Made From Fibers & Filaments: ExamplesFilaments: Examples
Thinsulate® from 3Mcomposed of large fibers+sub-denier fibers Synthetic leathercomposed of Spunlacedsplittable fibers
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Layered Composites: Layered Composites: ExamplesExamples
Spunlaced fabrics made of wood pulp and Synthetic Fibres
• Tissues paper layered ontop of carded web prior tohydroentanglement • Fabric has one side rich inwood pulp fiber • Treatment is added towood pulp fibers toachieve barrier properties
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Nonwovens whereparticulates are bondedto the fiber or filamentwith an adhesive ( e.g.Abrasive pad whereabrasive particulates arebonded to the fibers withA latex. Same approachhas been used forcarbon black)
Composite Nonwovens With Composite Nonwovens With ParticulatesParticulates
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Composite Nonwovens With ParticulatesComposite Nonwovens With Particulates
Nonwovens made up ofbicomponent fibers,where the outer layer ismelted to form bondsbetween the fibers andbetween the fibers andthe particulates.