I85PREP
⌘ K
PEC EPE Textile study materials
PEC EPE Textile study resources

PEC EPE Textile practice questions

One question at a time. Build your PEC EPE Textile understanding.

First 50 of 200 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

Continue in the practice tool above to load more questions, 50 at a time.

Question 1Textile Engineering

Which yarn count system expresses yarn linear density as the mass in grams of 9,000 metres of yarn?

  1. Metric number (Nm)
  2. Denier Correct answer.
  3. English cotton count (Ne)
  4. Tex

Explanation

Denier is defined as the mass in grams of 9,000 m of yarn, so a heavier denier means a coarser yarn. Tex uses 1,000 m and metric number and cotton count are indirect systems where a higher number means a finer yarn.

Question 2Textile Engineering

A single yarn is described as having a twist multiplier of 4.0 in the cotton system. What does the twist multiplier primarily allow a spinner to compare?

  1. The package density after winding
  2. The fibre length distribution of the cotton used
  3. The lea strength of yarns of different counts at equal twist level
  4. The twist level of yarns of different counts on a common basis Correct answer.

Explanation

The twist multiplier relates turns per inch to the square root of the cotton count, giving a count-independent measure of twist level. It lets a spinner compare how tightly twisted yarns of different linear densities really are.

Question 3Textile Engineering

In ring spinning, which motion causes the yarn twist to be inserted between the front rollers and the traveller?

  1. The difference between drafting roller speeds
  2. The difference between front roller surface speed and spindle speed
  3. The difference between winding-on speed and balloon height
  4. The rotation of the traveller around the ring Correct answer.

Explanation

The traveller rotates around the ring, and each revolution inserts a turn of twist into the yarn delivered by the front rollers. The traveller runs slightly slower than the spindle; that speed difference permits winding onto the cop rather than causing twist insertion.

Question 4Textile Engineering

Which spinning system produces yarn by wrapping fibres around a core of parallel fibres using a rotating air vortex, giving high production speed with a characteristic wrapper-fibre structure?

  1. Air-jet (vortex) spinning Correct answer.
  2. Wrap spinning
  3. Friction (DREF) spinning
  4. Rotor spinning

Explanation

Air-jet or vortex spinning uses a high-speed air vortex to wrap fibres around a core, producing a yarn with wrapper fibres and a real-twist-free core. It runs at much higher speeds than ring spinning but gives a different handle and strength profile.

Question 5Textile Engineering

A woven fabric is described as a 2/2 twill. What does this designation indicate about the weave repeat?

  1. Two colours alternating in the warp direction
  2. Two ends up and two ends down in the repeat, producing a diagonal line Correct answer.
  3. Two warp and two weft yarns interlaced in a plain repeat
  4. Two picks up and two picks down in the repeat, producing a rib

Explanation

In twill notation the first figure gives the number of ends (warp) lifted and the second the number lowered, so 2/2 twill has two ends up and two down, shifting by one end each pick to give a diagonal. The float length and diagonal direction are the defining features.

Question 6Textile Engineering

Which weave structure is characterised by long floats that are deliberately distributed to improve lustre and drape, typically used for satin fabrics?

  1. Basket weave
  2. Rib weave
  3. Satin weave Correct answer.
  4. Plain weave

Explanation

Satin weave uses long floats with interlacing points spaced so they do not touch, giving a smooth lustrous face and good drape. The float length and the absence of a visible diagonal distinguish it from twill.

Question 7Textile Engineering

In weft knitting, what distinguishes a single-jersey structure from a rib structure?

  1. Jersey uses two needle beds while rib uses one
  2. Jersey has tuck loops while rib has only knit loops
  3. Jersey is always made from filament yarn while rib uses staple yarn
  4. Jersey has all loops drawn in one direction on one needle bed, while rib interlaces face and reverse loops on two beds Correct answer.

Explanation

Single jersey is knitted on one needle bed with all loops forming face loops on one side and reverse loops on the other. Rib uses two needle beds with needles alternating, so face and reverse wales appear side by side and the fabric is balanced and wider.

Question 8Textile Engineering

Which fabric formation method produces a nonwoven web by extruding continuous filaments that are drawn and laid directly onto a conveyor using high-velocity air?

  1. Spunbonding Correct answer.
  2. Needle-punching
  3. Carding
  4. Melt-blowing

Explanation

Spunbonding extrudes and draws continuous filaments and lays them directly into a web, which is then bonded. The continuous filament nature gives high strength relative to carded staple webs.

Question 9Textile Engineering

A dyer wants to exhaust a reactive dye onto cotton. Which condition is essential for the dye to form a covalent bond with the cellulose?

  1. An acidic dyebath with a pH below 4
  2. A strongly reducing dyebath
  3. An alkaline dyebath that generates the reactive cellulose anion Correct answer.
  4. A non-ionic surfactant-rich dyebath

Explanation

Reactive dyes react with cellulose after the fibre is swollen in alkali, which ionises hydroxyl groups and drives nucleophilic substitution or addition. Without the alkaline environment, fixation is very low and most dye remains unfixed.

Question 10Textile Engineering

Which dye class is applied to polyester from an aqueous dyebath near or above 130 °C because the fibres are hydrophobic and tightly packed?

  1. Acid dyes
  2. Disperse dyes Correct answer.
  3. Vat dyes
  4. Direct dyes

Explanation

Disperse dyes are sparingly soluble, finely dispersed and diffuse into hydrophobic polyester when the fibre is above its glass transition, hence the high-temperature pressurised process. Direct, acid and vat dyes are intended for cellulose or protein fibres.

Question 11Textile Engineering

In colour measurement, what does the K/S value derived from the Kubelka-Munk equation represent?

  1. The tristimulus value of the illuminant
  2. The reflectance of a white tile
  3. The ratio of absorption to scattering of a coloured substrate at a given wavelength Correct answer.
  4. The colour difference between two samples

Explanation

The Kubelka-Munk function relates reflectance to the ratio of absorption coefficient K to scattering coefficient S. K/S is widely used in recipe prediction because it varies approximately linearly with dye concentration for many systems.

Question 12Textile Engineering

Which colour fastness test assesses the resistance of a dyed textile to rubbing?

  1. Light fastness
  2. Wash fastness
  3. Crocking fastness Correct answer.
  4. Perspiration fastness

Explanation

Crocking fastness measures colour transfer to a white cloth when rubbed, either dry or wet. It is particularly important for dark shades and for dyes that remain on the fibre surface.

Question 13Textile Engineering

A fabric is tested for dimensional stability and shows shrinkage after laundering. Which fibre property most strongly influences the magnitude of relaxation shrinkage in a cotton woven fabric?

  1. The melting point of the fibre
  2. The refractive index of the fibre
  3. The dielectric constant of the fibre
  4. The residual shrinkage built into the yarn during weaving and finishing Correct answer.

Explanation

Relaxation shrinkage arises because yarns and fabrics retain latent strain from spinning, weaving and finishing, which is released in wet relaxed conditions. Cotton fabrics are often pre-shrunk or compressive-shrunk to reduce this residual shrinkage.

Question 14Textile Engineering

Which mechanical test measures the force required to propagate a tear in a woven fabric using a tongue-shaped specimen?

  1. Elmendorf tear test
  2. Burst strength test
  3. Grab tensile test
  4. Tongue tear test Correct answer.

Explanation

The tongue tear test uses a slit specimen with two tongues pulled apart to propagate a tear, giving a measure of resistance to tearing. It differs from the Elmendorf method, which uses a pendulum to measure tear energy.

Question 15Textile Engineering

In a Martindale abrasion test, what does the number of rubs to a defined end-point primarily quantify?

  1. The resistance of a fabric to surface abrasion Correct answer.
  2. The colour fastness to light
  3. The air permeability of a fabric
  4. The thermal conductivity of a fabric

Explanation

The Martindale instrument rubs a specimen against an abradant in a Lissajous pattern, and the cycles to a defined change indicate abrasion resistance. It is widely used for upholstery and for pilling assessment with a different assessment criterion.

Question 16Textile Engineering

Which fibre is a regenerated cellulose fibre produced by dissolving cellulose pulp in a solvent and spinning it, with the modern variant using N-methylmorpholine-N-oxide?

  1. Lyocell Correct answer.
  2. Viscose rayon
  3. Modal
  4. Acetate

Explanation

Lyocell is spun from a solution of cellulose in N-methylmorpholine-N-oxide, a direct solvent system with high solvent recovery. Viscose and modal use the xanthate route, and acetate is a cellulose ester rather than regenerated cellulose.

Question 17Textile Engineering

In ring spinning, a higher draft in the drafting zone without adequate fibre control most directly leads to which outcome?

  1. Increased irregularity and more short thick places Correct answer.
  2. Improved yarn elongation with no effect on mass variation
  3. Higher yarn tenacity with unchanged irregularity
  4. Improved yarn evenness and fewer thin places

Explanation

Excessive draft with insufficient fibre control causes floating fibres to move irregularly, producing thick and thin places and higher mass variation. Fibre control depends on roller settings, fibre length distribution and the drafting system.

Question 18Textile Engineering

Which yarn fault is a thick place caused by a cluster of fibres that is much larger than the normal yarn diameter and is typically classified as a 'slub'?

  1. Thin place
  2. Knot
  3. Nep
  4. Slub Correct answer.

Explanation

A slub is an abnormally thick place in the yarn caused by a cluster of fibres or a drafting irregularity. Neps are small entangled fibre knots, and thin places are local reductions in mass.

Question 19Textile Engineering

In a plain weave, which parameter is defined as the number of ends or picks per unit length?

  1. Sett Correct answer.
  2. Areal density
  3. Cover factor
  4. Crimp

Explanation

Sett is the number of ends or picks per unit length, such as ends per inch. Cover factor combines sett with yarn linear density to indicate how much of the fabric area is covered by yarn.

Question 20Textile Engineering

A fabric is described as having a high air permeability. Which structural feature is most likely responsible?

  1. A heavily calendered fabric surface
  2. A tightly woven fabric with high cover factor
  3. A fabric with high thickness and low porosity
  4. An open structure with larger inter-yarn pores Correct answer.

Explanation

Air permeability depends mainly on the size and number of pores between yarns, so an open structure with larger pores allows more air through. Cover factor, finishing and thickness all modify the pore geometry.

Question 21Textile Engineering

Which finishing process uses a concentrated sodium hydroxide solution to swell cotton, improving lustre and dye uptake?

  1. Sanforisation
  2. Mercerisation Correct answer.
  3. Calendering
  4. Singeing

Explanation

Mercerisation swells the cotton cellulose in strong alkali under tension, giving a rounder, smoother fibre with improved lustre, strength and dye affinity. The tension is essential to prevent shrinkage while the fibre swells.

Question 22Textile Engineering

Which flame-retardant mechanism is associated with phosphorus-based finishes on cellulose fabrics?

  1. Physical coating that excludes oxygen
  2. Dilution of combustible gases by inert fillers
  3. Promotion of char formation and reduced flammable volatiles Correct answer.
  4. Rapid cooling of the flame by endothermic fillers only

Explanation

Phosphorus compounds act mainly in the condensed phase, promoting dehydration and char formation and reducing the yield of flammable volatiles. This is more effective for cellulose than purely physical mechanisms.

Question 23Textile Engineering

Which objective of textile testing is served by sampling a consignment according to a defined plan before measuring a property?

  1. Ensuring the sample is representative of the lot Correct answer.
  2. Guaranteeing the fabric meets a specification
  3. Eliminating all measurement uncertainty
  4. Removing the need for statistical analysis

Explanation

A defined sampling plan ensures that the tested specimens represent the variability of the consignment, which is essential for valid inference. It reduces sampling bias but does not remove measurement uncertainty or guarantee compliance.

Question 24Textile Engineering

In a tensile test on a woven fabric, the initial slope of the load-extension curve is used to derive which property?

  1. Initial modulus Correct answer.
  2. Breaking elongation
  3. Creep rate
  4. Work of rupture

Explanation

The initial modulus is obtained from the slope of the linear region of the load-extension curve, normalised for specimen dimensions. Breaking elongation is read at the failure point, and work of rupture is the area under the curve.

Question 25Textile Engineering

Which factor most directly determines the moisture regain of a textile fibre at a given relative humidity and temperature?

  1. The number of accessible hydrophilic groups and the amorphous region Correct answer.
  2. The fibre's electrical resistance in dry air
  3. The fibre's melting point
  4. The fibre's refractive index

Explanation

Moisture regain depends on the availability of hydrophilic groups such as hydroxyl and amide groups and on the accessibility of amorphous regions. Crystalline regions are largely inaccessible, so highly crystalline fibres absorb less moisture.

Question 26Textile Engineering

In a woven fabric, what does the term 'crimp' describe about a yarn?

  1. The waviness of a yarn caused by its interlacing with crossing yarns Correct answer.
  2. The twist level inserted during spinning
  3. The number of fibres in the yarn cross-section
  4. The tendency of the yarn to shrink on wetting

Explanation

Crimp is the undulating path a yarn follows as it passes over and under crossing yarns in the weave. It is expressed as a percentage of the straightened length and strongly affects extensibility, cover and handle.

Question 27Textile Engineering

Which yarn numbering system expresses linear density as the mass in grams of 9000 metres of yarn?

  1. English cotton count
  2. Denier Correct answer.
  3. Metric count
  4. Tex

Explanation

Denier is the direct system defined as grams per 9000 m of yarn, so a heavier yarn has a higher denier. Tex is grams per 1000 m, while cotton and metric counts are indirect systems where a higher number means a finer yarn.

Question 28Textile Engineering

A spinner wants to convert a yarn linear density given in tex to the equivalent in decitex. Which conversion applies?

  1. Multiply the tex value by 9
  2. Divide the tex value by 10
  3. Divide the tex value by 9
  4. Multiply the tex value by 10 Correct answer.

Explanation

Tex is grams per 1000 m and decitex is grams per 10 000 m, so decitex is exactly ten times tex. Multiplication by 10 converts between them directly.

Question 29Textile Engineering

Which fibre property is defined as the mass of water absorbed by a dry fibre expressed as a percentage of its own dry mass under specified conditions?

  1. Moisture regain Correct answer.
  2. Water retention
  3. Moisture content
  4. Wettability

Explanation

Moisture regain uses the oven-dry mass as the denominator, whereas moisture content uses the total wet mass. The distinction matters because the two figures differ for the same sample at the same humidity.

Question 30Textile Engineering

Which natural fibre is a bast fibre obtained from the stem of its plant and is noted for high strength when wet?

  1. Wool
  2. Silk
  3. Flax Correct answer.
  4. Cotton

Explanation

Flax is a bast fibre extracted from the plant stem, and its cellulose structure gives it greater strength when wet than dry. Cotton is a seed hair, while wool and silk are animal protein fibres.

Question 31Textile Engineering

Which spinning system produces a yarn by wrapping fibres around a core using a rotating hollow spindle and a pair of drafting rollers without a true twisting spindle?

  1. Rotor spinning
  2. Air-jet spinning
  3. Ring spinning
  4. Wrap spinning Correct answer.

Explanation

Wrap spinning uses a hollow spindle to wrap a filament or fibre strand helically around a core, giving a distinctive wrapped structure. Ring and rotor systems insert true twist by different mechanisms, and air-jet uses turbulent air rather than a wrapping spindle.

Question 32Textile Engineering

In a shuttle loom, what is the primary function of the reed?

  1. To beat the newly inserted pick up to the fell of the cloth Correct answer.
  2. To lift the warp threads to form the shed
  3. To control the tension of the warp sheet
  4. To wind the woven fabric onto the cloth roller

Explanation

The reed is a comb-like element that both spaces the warp ends and beats each pick to the fell of the cloth. Shed formation is the job of the heald shafts, not the reed.

Question 33Textile Engineering

Which term describes the removal of natural waxes and pectins from cotton fabric using hot alkaline liquor before dyeing?

  1. Scouring Correct answer.
  2. Mercerising
  3. Desizing
  4. Bleaching

Explanation

Scouring saponifies and removes waxes, pectins and other impurities so the cotton becomes uniformly absorbent. Bleaching then destroys natural colour, and mercerising is a separate caustic swelling treatment.

Question 34Textile Engineering

A woven cotton fabric shows a distinctly higher tear strength when tested with the tear running along the warp compared with the weft. Which structural factor most plausibly explains this?

  1. The warp yarns contain more crimp than the weft
  2. The fabric has a higher pick density than end density
  3. The weft yarns have been sized before weaving
  4. The warp yarns have higher linear density and lower twist than the weft Correct answer.

Explanation

Tear strength depends strongly on yarn strength and on the mobility of yarns at the tear apex. Coarser, lower-twist warp yarns can slide and bunch more readily, so the tear propagates with more difficulty.

Question 35Textile Engineering

Which condition must be controlled in a bursting strength test on a knitted fabric to obtain comparable results between laboratories?

  1. The colour of the fabric under test
  2. The twist direction of the yarns
  3. The pH of the water used to condition the specimen
  4. The rate of increase of pressure or the rate of distension of the diaphragm Correct answer.

Explanation

Bursting strength depends on how quickly the load is applied, because textile viscoelasticity makes strength rate-sensitive. Standard methods therefore fix the rate of pressure rise or the distension rate.

Question 36Textile Engineering

A laboratory needs to compare the evenness of two cotton yarns of different linear density. Which approach gives a fair comparison?

  1. Compare the coefficient of variation of count directly without adjustment
  2. Compare the yarn tenacity values instead of evenness
  3. Compare the count CV after normalising against the irregularity of an ideal random sliver of the same count Correct answer.
  4. Compare the mean diameter measured by two different operators

Explanation

The coefficient of variation rises with fineness, so raw CV values are not comparable across counts. Normalising against the limiting irregularity of an ideal random arrangement gives the index of irregularity, which is count-independent.

Question 37Textile Engineering

Which mechanism explains why a polyester fabric wicks liquid water poorly despite having a smooth filament surface?

  1. The fibre dissolves slightly in water and seals the pores
  2. The fibre has a very high moisture regain that traps water internally
  3. The fibre is hydrophobic and has low surface energy, so water does not spread readily Correct answer.
  4. The filament yarns have no capillary spaces between them

Explanation

Polyester is hydrophobic with low surface energy, so capillary penetration is opposed by the high contact angle. Wicking can be improved by changing the filament cross-section or by hydrophilic finishing.

Question 38Textile Engineering

A dyer observes that a reactive dye batch on cotton shows poor colour yield even though the dye concentration is correct. Which cause is most consistent with insufficient electrolyte in the dyebath?

  1. Over-reduction of the azo chromophore by the alkali
  2. Excessive covalent fixation of dye within the fibre
  3. Insufficient exhaustion of the dye onto the fibre before fixation Correct answer.
  4. Too high a fixation ratio caused by over-alkaline conditions

Explanation

Reactive dyes carry anionic charges and cotton acquires negative surface charge in water, so salt is needed to screen repulsion and promote exhaustion. Without enough electrolyte, less dye reaches the fibre and less can fix.

Question 39Textile Engineering

Which finishing effect is produced by calendering a fabric between heated bowls?

  1. Increased crimp in the warp yarns
  2. Increased air permeability
  3. Increased moisture regain of the fibres
  4. Increased surface smoothness and reduced thickness Correct answer.

Explanation

Calendering passes the fabric through a series of heated bowls under pressure, flattening surface fibres and reducing thickness. The result is a smoother, often more lustrous handle.

Question 40Textile Engineering

In a Stoll quartermaster abrasion test, what does the result record?

  1. The angle at which a fabric begins to drape
  2. The height of water rising up a fabric strip
  3. The number of cycles needed to abrade two small fabric specimens to a defined end-point Correct answer.
  4. The load required to rupture a fabric strip

Explanation

The Stoll quartermaster rubs two circular specimens against an abradant under controlled load and records the cycles to a defined end-point such as yarn breakdown. It is a standard abrasion resistance test.

Question 41Textile Engineering

Which colour fastness property is assessed by exposing a dyed specimen alongside blue wool standards to a controlled light source?

  1. Colour fastness to perspiration
  2. Colour fastness to washing
  3. Colour fastness to dry cleaning
  4. Colour fastness to light Correct answer.

Explanation

Light fastness is graded by comparing the fading of the specimen with the fading of blue wool references exposed at the same time. The grade reflects the light dose needed to produce a defined change.

Question 42Textile Engineering

A dyer wants to match a target shade on a blended fabric containing polyester and cotton. Which approach is technically appropriate?

  1. Dye the two components with different dye classes in a two-stage or one-bath two-dye process Correct answer.
  2. Apply a vat dye that exhausts only onto polyester
  3. Apply a single disperse dye that colours both fibre components equally
  4. Apply a reactive dye that bonds to polyester under acid conditions

Explanation

Polyester and cotton have different dye affinities, so a union shade requires dyeing each component with its appropriate class, such as disperse for polyester and reactive or vat for cotton. This is done in two stages or in a carefully controlled one-bath two-dye process.

Question 43Textile Engineering

Which property of a fibre most directly governs the initial modulus of a yarn made from it in the low-extension region?

  1. The fibre's melting point
  2. The fibre's ability to absorb ultraviolet light
  3. The fibre's moisture regain at standard conditions
  4. The fibre's elastic modulus and its orientation along the yarn axis Correct answer.

Explanation

In the low-extension region, yarn stiffness is dominated by the stiffness of the constituent fibres and how well they are aligned with the yarn axis. High orientation and high fibre modulus give a steeper initial load-extension slope.

Question 44Textile Engineering

Which fabric construction gives the highest cover factor for a given yarn linear density?

  1. A warp-knitted locknit structure
  2. A 5-end satin weave with the same yarns
  3. A needle-punched nonwoven
  4. A plain weave with maximum sett Correct answer.

Explanation

Cover factor depends on yarn diameter and the number of interlacings per unit area. A plain weave with the maximum sett places the most yarns per unit area and therefore gives the highest cover for a given yarn.

Question 45Textile Engineering

A spinner observes periodic thick and thin places at regular intervals along a ring-spun yarn. Which cause is most likely?

  1. Insufficient twist in the yarn
  2. A defective or eccentric drafting roller Correct answer.
  3. Excessive humidity in the spinning room
  4. Random fibre ends in the sliver

Explanation

Regularly spaced thick and thin places indicate a periodic fault, typically from an eccentric or damaged drafting roller or a faulty gear train. Random irregularity, by contrast, arises from the statistical nature of fibre arrangement.

Question 46Textile Engineering

Which statement correctly describes the effect of increasing twist on a staple yarn up to the optimum level?

  1. Tenacity increases because fibre-to-fibre friction and lateral pressure increase Correct answer.
  2. Tenacity decreases because the fibres become more aligned
  3. Yarn diameter increases steadily with twist
  4. Elongation at break decreases to zero

Explanation

Adding twist increases lateral pressure and inter-fibre friction, so the yarn can carry more load up to an optimum twist. Beyond that optimum, obliquity of the fibres reduces the axial contribution and tenacity falls.

Question 47Textile Engineering

A fabric is required to resist penetration by liquid water while allowing water vapour to pass. Which finish strategy best meets both requirements?

  1. A calendered finish that closes all inter-yarn pores
  2. A hydrophobic finish combined with a microporous or hydrophilic pore structure Correct answer.
  3. A continuous hydrophobic film laminated to the fabric surface
  4. A water-soluble sizing agent applied to the back of the fabric

Explanation

Waterproof breathable performance requires high resistance to liquid water entry while permitting vapour transmission. A hydrophobic surface combined with microporosity or a hydrophilic membrane achieves this, whereas a continuous film blocks vapour.

Question 48Textile Engineering

A woven fabric shows a persistent spirality after laundering. Which combination of factors most likely contributes?

  1. High light fastness combined with low washing fastness
  2. High air permeability combined with low cover factor
  3. Residual torque in the yarns combined with relaxation shrinkage and crimp interchange Correct answer.
  4. High tearing strength combined with low abrasion resistance

Explanation

Spirality arises from torque in the yarns, especially where twist liveliness is high, and is amplified when the fabric relaxes and crimp redistributes during laundering. Weave and finishing tensions also influence the final distortion.

Question 49Textile Engineering

In colour measurement, two fabrics appear to match under one light source but differ under another. Which term describes this phenomenon?

  1. Dichroism
  2. Metamerism Correct answer.
  3. Fluorescence
  4. Metachromatism

Explanation

Metamerism occurs when two samples have different spectral reflectance curves that produce the same tristimulus values under one illuminant but diverge under another. It is why colour matches should be checked under several illuminants.

Question 50Textile Engineering

A nonwoven web is bonded by passing it through heated embossed rolls that fuse the filaments at discrete points. Which bonding method is described?

  1. Needle punching
  2. Spunlacing
  3. Chemical binder saturation
  4. Thermal calender bonding Correct answer.

Explanation

Thermal calender bonding uses heat and pressure at embossed points to fuse thermoplastic fibres, creating a point-bonded structure. Spunlacing uses high-pressure water jets and needle punching uses barbed needles, both mechanical methods.