World of Nonwovens

A Presentation by

Dr. V. K. KothariProfessor

Textile Technology DepartmentIndian Institute of Technology Delhi

At TITS Bhiwani on 23.01.2010

Nonwoven ProductsNonwoven Products

Hydroentanglement Jets

Hydroetanglement wire

Hydroentanglement wire

Hydroentanglement wire

Spray bonding

Engraved rolls

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.

• 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.

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

Dust RemovalDust Removal

Filter cartridges, filterplates, filter bags andEcoProtec safety filtersfor industrial dustremoval applications,with high-performancefilter media made ofnonwovens.

Special FiltrationSpecial Filtration

• Respirators • Vacuum cleaners • Kitchen hood filters • …

HygieneHygiene

Baby diapers

Incontinence products

Feminine hygiene items

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.

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.

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.

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.

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.

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.

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.

Automotive InteriorsAutomotive Interiors

Facings and structuralreinforcement materialsare used in a variety ofdifferent applicationsIncludes:

headliners,

trunkliners,

door trim,

package trays,

sun visors and

seats.

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.

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.

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

Segment-Pie: Splitting by CardingSegment-Pie: Splitting by Carding

Card-splittable fiber before splitting Card-splittable fiber after carding

Increased Surface AreaIncreased Surface Area

Evolon is anewly patented,award winning method formanufacturing

Evolon… The Next GenerationEvolon… The Next Generation

Evolon… The TechnologyEvolon… The Technology

16 Sector PIE ~ 0.1 dtex

2 Sector S/S ~ 1 dtex

300 Islands-in-the-sea As-spun Fiber300 Islands-in-the-sea As-spun Fiber

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

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

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

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.