KNOWLEDGEIndex

Read a fabric, end to end.

From yarn and fibre to knit structure, dyeing, finishing and quality testing — guides organised category by category to understand performance polyester knit fabric.

Yarn & Fibre Polyester Knit Basics: The Backbone of Performance Knit & Structure Single Jersey vs Interlock: Choosing a Polyester Knit Yarn & Fibre Recycled Polyester (rPET) in Knits Yarn & Fibre DTY Textured Yarn: Bulk, Stretch and Wicking Yarn & Fibre Polyester Blends: Cotton, Elastane, Modal Knit & Structure GSM Weight Guide: Choosing the Right Fabric Weight Knit & Structure Mesh and Piqué: Breathable Polyester Knits Knit & Structure Fleece and Scuba: Structured Polyester Knits Dyeing & Colour How Polyester Is Dyed: Disperse Dyes and HT Dyeing & Colour Color Management and Delta E in Polyester Knits Finishing & Performance Moisture-Wicking Finishing in Polyester Knits Finishing & Performance Functional Finishes for Polyester Knits Quality & Testing Knit Quality Testing: What to Measure in Polyester Sustainability Sustainability in Polyester Knits: Safety, Recycling, Durability Knit & Structure With or Without Elastane? Stretch and Recovery in Polyester Knits Finishing & Performance Brushed, Unbrushed and Fleece: Where Warmth Comes From in Polyester Knits Knit & Structure Piqué, Bird’s-Eye and Mesh: The Anatomy of Breathable Polyester Knits Knit & Structure Rib, Interlock and Ponte: Choosing the Right Double-Face Knit Knit & Structure The Weight Map: Which Knit Goes Where, from 60 to 500 g/m² Yarn & Fibre Naming in Polyester Knits: When One Fabric Has Many Names Polymer & Process PET Polymer Chemistry: IV, Polycondensation and Why It Matters Polymer & Process From Melt to Yarn: Melt Spinning and POY/FDY/HOY Polymer & Process Fibre Cross-Section Engineering: Trilobal, Hollow, Multi-Channel Polymer & Process Microfilament Science: Micro- and Nano-Denier Yarns Polymer & Process Cationic-Dyeable Polyester (CDP/ECDP) Polymer & Process Solution-Dyed (Dope-Dyed) Polyester Polymer & Process Bio-Based and Alternative Polyesters: bio-PET, PTT, PBT Performance Science Thermophysiological Comfort: Ret, Rct and the Sweating Hot Plate Performance Science The Physics of Moisture Transport: Capillarity and MMT Performance Science UPF Science: Why Polyester Shields UV Well Performance Science Antimicrobial and Odor-Control Chemistry Performance Science Durability Science: Abrasion, Pilling and Snag Dyeing & Colour The Disperse Dyeing Process: HT/HP, Thermosol and Carrier Dyeing & Colour Reductive Clearing, Oligomers and Wash Fastness Finishing & Performance Durable Water Repellency (DWR): PFAS-Free Chemistry and Durability Sustainability Polyester Recycling: Mechanical and Chemical Routes Sustainability Microplastics: Fibre Shedding and Control Sustainability The Standards Map: GRS, RCS, OEKO-TEX, bluesign, ZDHC Manufacturing & Machinery From PTA to Yarn: Inside a Polyester Polymer Plant Manufacturing & Machinery Bright, Semi-Dull, Full-Dull: Lustre Is Decided in the Polymer Plant Manufacturing & Machinery POY, FDY, HOY: The Filament Spinning Line and Its Speed Regime Manufacturing & Machinery From POY to DTY: The False-Twist Texturing Machine Manufacturing & Machinery DTY, ATY and ACY: Which Textured Yarn for Which Fabric Manufacturing & Machinery Before the Yarn: How Polyester Staple Fibre (PSF) Is Made Manufacturing & Machinery Ring, Rotor, Vortex and Compact: Spun Polyester Yarn Systems and Pilling Manufacturing & Machinery Gauge, Stitch Length and GSM: How Fabric Weight Is Set on the Knitting Machine Manufacturing & Machinery The Circular Knitting Machine: Single-Jersey vs Double-Jersey Architecture, OEMs and Production Ranges Manufacturing & Machinery Knit Defects: Spirality, Barré and Holes — Root Cause and Control Manufacturing & Machinery Tubular or Open-Width? The Take-Down Route and Why It Matters Manufacturing & Machinery Beyond Circular Knitting: Warp Knitting and Weaving Manufacturing & Machinery Tricot or Raschel? A Warp-Knit Selection Guide Manufacturing & Machinery Why Polyester Filament Loves the Water-Jet Loom Manufacturing & Machinery Warp Knitting’s Hidden Superpower: 3D Spacer Fabric Manufacturing & Machinery Jet, Soft-Flow, Airflow: Understanding the Polyester Dyeing Machine Manufacturing & Machinery What a Stenter Really Does: A Heat-Setting Guide Manufacturing & Machinery Compacting & Residual Shrinkage: How Compactors Lock In Dimensional Stability Manufacturing & Machinery The Looms Behind a Roll of Polyester — A Stage-by-Stage Machinery & OEM Reference Manufacturing & Machinery The Whole Polyester Chain in One Table: Typical Engineering Ranges Supply Chain & Industry From Chip to Cloth: The Value Chain and Where the Margin Sits Supply Chain & Industry Where the World’s Polyester Actually Comes From: Producers and the Value Chain Supply Chain & Industry Turkey’s Polyester and Knit-Dye Industry: Upstream Depth, Clusters and the Structural Moat Supply Chain & Industry STeP, ZDHC, Higg, bluesign: What Facility Certifications Actually Prove Supply Chain & Industry The Water and Energy in One Kilo of Dyed Polyester Knit Supply Chain & Industry The 4-Point Inspection System: How a Fabric Lot Gets Approved Supply Chain & Industry What Really Sets MOQ and Lead Time: Dye-Lot Math Supply Chain & Industry Knit Mill or Garment Manufacturer: Choosing in Turkey Sustainability Digital Product Passport (DPP) & ESPR: What It Means for Textiles
Guides by category

Yarn & Fibre

5 guides

Polyester Knit Basics: The Backbone of Performance

The backbone of performance knits is polyester filament, and the decisive measure is denier per filament: the same 150-denier yarn gives ≈3.1 dpf at 48 filaments and ≈1.0 dpf at 144 — identical weight, two completely different fabrics. Finer filaments mean more surface area and softness; tenacity is measured to ISO 2062.

Knowledge

DTY Textured Yarn: Bulk, Stretch and Wicking

DTY is flat POY filament given a permanent crimp by false-twist in a first heater at ~200–220 °C; a second heater (yarn exit ~130–180 °C) kills residual torque. That crimp is exactly what FDY lacks — bulk, stretch and moisture transport all come from it. Crimp contraction is measured to ISO 5688.

Knowledge

Recycled Polyester (rPET) in Knits

What decides rPET quality is chain length — intrinsic viscosity (ASTM D4603 · ISO 1628-5). PET is hygroscopic: at a melt temperature of ~280 °C, moisture in the chain hydrolytically cleaves the ester bond, so IV drops during recycling. Solid-state polycondensation (~200–220 °C) rebuilds it; GRS/RCS certify chain of custody, not performance.

Knowledge

Polyester Blends: Cotton, Elastane, Modal

Pure polyester gives strength, fast drying and colour fastness; in return it brings a cool synthetic hand, static build-up and limited stretch. Blending exists for one reason — to let a second fibre cover that gap: cotton adds hand and moisture pickup, elastane adds recovery, modal adds drape and softness. The cost is pilling tendency and dyeing two fibres separately.

Knowledge

Naming in Polyester Knits: When One Fabric Has Many Names

In textiles the same fabric carries several names, and this is the most common source of misunderstanding between buyer and mill: süprem = single jersey = polyester jersey, iki iplik = French terry, double-face interlock = ponte. The confusion is not only in names — yarns below 1 dpf count as microfilament, so two fabrics sharing a name can feel entirely different. An order should always be defined by structure + weight + yarn.

Knowledge

Polymer & Process

7 guides

PET Polymer Chemistry: IV, Polycondensation and Why It Matters

The hand, strength and drape of a polyester fabric are decided by a single number in the reactor — intrinsic viscosity — long before any yarn exists. IV is measured to ASTM D4603 / ISO 1628-5 and sits at roughly 0.62–0.68 dL/g for apparel-grade PET.

Knowledge

From Melt to Yarn: Melt Spinning and POY/FDY/HOY

A polyester filament’s character is decided not at the knitting machine but in the few-second spinning line where melt turns to solid — and those seconds are governed by take-up speed. The resulting yarn’s linear density is determined to ISO 2060 and its tenacity to ISO 2062.

Knowledge

Fibre Cross-Section Engineering: Trilobal, Hollow, Multi-Channel

The instant a filament’s cross-section leaves the circle for lobes, grooves and voids, its luster, drying speed and warmth are re-engineered. The effect of cross-section on moisture behaviour is measured to AATCC 195 (MMT) and AATCC 197.

Knowledge

Microfilament Science: Micro- and Nano-Denier Yarns

Take a filament down to one tenth the thickness of a human hair and you rewrite a fabric’s hand, cover and moisture behaviour — but you pay the bill in the dyehouse and in strength. The cost shows in the dyehouse and at the surface: colour fastness is tracked to ISO 105, pilling to ISO 12945-2.

Knowledge

Cationic-Dyeable Polyester (CDP/ECDP)

Anionic sulfonate sites grafted onto the polymer chain make ordinary polyester dyeable with cationic (basic) dyes — unlocking brilliant shades and two-tone effects, at the cost of some strength and usually some light fastness. The fastness of the resulting colour is verified with the ISO 105 series.

Knowledge

Solution-Dyed (Dope-Dyed) Polyester

A coloring method that locks pigment into the fiber while it is still molten, collapsing the water and energy footprint and lifting fastness at its root. The result shows at the top grades of the ISO 105 fastness series.

Knowledge

Bio-Based and Alternative Polyesters: bio-PET, PTT, PBT

Where plant-derived carbon meets a kinked chain geometry, polyester delivers hand and stretch far beyond fossil PET. Bio-based carbon content is evidenced to ASTM D6866, compostability to EN 13432 / ISO 14855.

Knowledge

Knit & Structure

8 guides

Single Jersey vs Interlock: Choosing a Polyester Knit

Single jersey is knitted on one needle bed: light, fluid, different on each face and curling at the edges (80–200 g/m²). Interlock is double bed: fuller, identical on both faces, a stable surface that does not curl (80–260 g/m²). Even at the same weight the two feel different, which is why an order is defined by structure + weight + yarn.

Knowledge

GSM Weight Guide: Choosing the Right Fabric Weight

GSM (g/m²) is a fabric’s weight per square metre and the fastest indicator of what it is for: tees typically sit at ~120–180 g/m², sweatshirts and joggers at ~250–350 g/m², jacket linings and structured outerwear at ~300 g/m² and above. With the same structure and yarn, higher GSM means more opacity and generally more durability.

Knowledge

Mesh and Piqué: Breathable Polyester Knits

Polyester does not absorb moisture; in mesh and piqué the cooling comes from STRUCTURE, not the fibre. Pore architecture is read together with weight: breathable micro mesh 70–130 g/m², sports mesh 100–170 g/m², bird’s-eye mesh 120–200 g/m², piqué 100–370 g/m². The real claim of the structure is air permeability, measured to ISO 9237.

Knowledge

Fleece and Scuba: Structured Polyester Knits

Fleece and scuba are the two structured families where polyester is used for warmth and body, and the difference is at the surface: in fleece the warmth comes from a raised pile (100–400 g/m²), in scuba the body comes from the double-faced structure itself. Because the weight band is wide, “fleece” alone is not a specification — structure + weight + surface treatment must be written together.

Knowledge

With or Without Elastane? Stretch and Recovery in Polyester Knits

Stretch in knits comes in three distinct classes, and confusing them means ordering the wrong fabric: elastane-free structures stretch mechanically only (single jersey 80–200 g/m²), jersey with elastane stretches two-way (120–250 g/m²), elastane interlock four-way (120–300 g/m²). That is why an order should be defined by structure + weight + stretch class.

Knowledge

Piqué, Bird’s-Eye and Mesh: The Anatomy of Breathable Polyester Knits

Because polyester does not absorb moisture, the cooling comes from structure: knit-tuck cells and deliberate holes open air channels in the fabric. Within one family the weight band is wide — mesh 70–250 g/m², piqué 100–370 g/m² — and breathability cannot be compared without reading pore and weight together. Air permeability is measured to ISO 9237.

Knowledge

Rib, Interlock and Ponte: Choosing the Right Double-Face Knit

Single jersey is single-faced and its edges curl; three double-faced structures solve that differently. Rib gives high crosswise recovery (150–500 g/m²), interlock builds a stable surface identical on both faces (80–360 g/m²), and ponte puts body into the shape. The choice is made together with the weight band: at the same structure, a different weight means a different hand.

Knowledge

The Weight Map: Which Knit Goes Where, from 60 to 500 g/m²

Weight is the fastest indicator of what a knit is for, and Fersan’s ten families line up on a single axis from 60 to 500 g/m². The light band — mesh and jersey — goes to linings and summer tops; the middle band, piqué and interlock, to polos and dresses; the upper band, French terry, rib and fleece, to sweatshirts, collar-and-cuff trims and outer layers. At the same weight, different structures give different hand: weight alone is not a quality measure.

Knowledge

Dyeing & Colour

4 guides

How Polyester Is Dyed: Disperse Dyes and HT

Polyester cannot be dyed with reactive dyes because PET is hydrophobic and chemically inert; the only route is diffusing water-insoluble disperse dye into the fibre’s amorphous regions. That requires passing the glass transition (~80 °C dry, ~65 °C in water): HT/HP exhaust dyeing runs at ~130 °C under pressure, while carrier dyeing does the same work at ~95–100 °C.

Knowledge

Color Management and Delta E in Polyester Knits

Colour consistency is not an eyeball call but a measured number: the difference between two colours is expressed as ΔE, and today’s standard is CIEDE2000 (CIE 142-2001 · ISO/CIE 11664-6). Lab-dip approval sets the threshold for that metric; metamerism — two colours matching under one illuminant and diverging under another — is why approval always happens under a defined light source.

Knowledge

The Disperse Dyeing Process: HT/HP, Thermosol and Carrier

Dyeing polyester is the engineering of placing a near-water-insoluble disperse dye into the amorphous regions of a fibre whose glass-transition temperature has been exceeded, by solid-state diffusion. Chemical compliance is governed by ZDHC and OEKO-TEX, and fastness by the ISO 105 series.

Knowledge

Reductive Clearing, Oligomers and Wash Fastness

After disperse dyeing, unfixed surface dye and migrating cyclic oligomer wreck fastness and appearance unless reductive clearing removes them. The result shows directly in ISO 105 wash and rub fastness grades.

Knowledge

Finishing & Performance

4 guides

Moisture-Wicking Finishing in Polyester Knits

Wicking is not polyester absorbing moisture but transporting it through capillary channels between filaments — the fibre stays hydrophobic; structure and finish do the moving. Vertical wicking is measured to AATCC 197, the real engineering depth to AATCC 195 (MMT), and drying rate to AATCC 201. What matters is that these values survive ISO 6330 laundering without losing a grade.

Knowledge

Functional Finishes for Polyester Knits

A finish is the treatment that changes what a greige knit does, and each rests on different physics: water repellency lowers surface energy, antistatic conducts charge away, UV finishes absorb light, antimicrobial chemistry breaks the bacterial chain. The decisive question is not what the finish does but how many washes it survives; for skin-contact goods, chemical safety is evidenced by OEKO-TEX.

Knowledge

Brushed, Unbrushed and Fleece: Where Warmth Comes From in Polyester Knits

Warmth in a knit comes from two places: trapped air and surface pile. French terry holds air with its looped back (150–350 g/m²), three-thread fleece builds a heavier base (200–350 g/m²), and brushed fleece raises the surface to enlarge the air layer (100–400 g/m²). Brushing does not change the weight; it gives a warmer surface at the same weight.

Knowledge

Durable Water Repellency (DWR): PFAS-Free Chemistry and Durability

Water repellency is a surface-energy game PFAS-free chemistry can win — but oil repellency is still fluorine’s territory. Performance is measured by the ISO 4920 / AATCC TM22 spray test; durability is that same test repeated after laundering.

Knowledge

Performance Science

5 guides

Thermophysiological Comfort: Ret, Rct and the Sweating Hot Plate

Whether a fabric “breathes” is not a marketing line but two numbers measured on a sweating guarded hot plate: thermal resistance Rct and evaporative resistance Ret. Both are measured on a sweating guarded hotplate to ISO 11092 (equivalent ASTM F1868).

Knowledge

The Physics of Moisture Transport: Capillarity and MMT

Sweat’s journey from skin to environment is nothing more than contact angle, capillary pressure and an inter-layer gradient; the equation that describes it is Washburn, the instrument that measures it is the MMT. The measurement chain runs AATCC 197 (vertical wicking), AATCC 195 (MMT) and AATCC 201 (drying rate).

Knowledge

UPF Science: Why Polyester Shields UV Well

UPF is not your sunscreen’s SPF — it measures how much of the sun’s damaging ultraviolet a fabric filters out, and polyester’s benzene ring is the chemical heart of the job. UPF is measured to EN 13758 and AATCC TM183.

Knowledge

Antimicrobial and Odor-Control Chemistry

Fabric does not create the smell — the bacteria clinging to it do; antimicrobial chemistry breaks that chain by either binding to the fiber or releasing an active ion. Efficacy is measured quantitatively to AATCC 100 / ISO 20743 and qualitatively to AATCC 147 / ISO 20645.

Knowledge

Durability Science: Abrasion, Pilling and Snag

How long a fabric lasts is not a single number: abrasion, pilling, snagging and bursting are independent damage mechanisms, each measured by its own standard method. Each is measured separately: abrasion to ISO 12947-2 (Martindale), pilling to ISO 12945-1/-2.

Knowledge

Quality & Testing

1 guides

Sustainability

5 guides

Sustainability in Polyester Knits: Safety, Recycling, Durability

Polyester is petroleum-based, so the sustainability argument has to be framed correctly: the real levers are chemical safety (OEKO-TEX STANDARD 100), recycled content (GRS/RCS chain of custody), water and energy in the dyehouse, and product lifetime. Microfibre shedding is measured to ISO 4484-1:2023 and AATCC TM212; durability is itself a sustainability lever.

Knowledge

Polyester Recycling: Mechanical and Chemical Routes

Mechanical recycling shortens the chain and carries colour through; chemical depolymerization breaks the polymer back to monomer and rebuilds virgin-equivalent quality — the difference lives in whether intrinsic viscosity is preserved. The single number separating the two routes is intrinsic viscosity (ASTM D4603 · ISO 1628-5).

Knowledge

Microplastics: Fibre Shedding and Control

The micro-fibres that break off fabric during washing and wear are cited as the single largest source of primary microplastics in the ocean — yet shedding is measurable and can be engineered down through fibre choice and construction. Shedding is measured to ISO 4484-1 (laboratory), -2 and -3.

Knowledge

The Standards Map: GRS, RCS, OEKO-TEX, bluesign, ZDHC

Every sustainability label answers a different question; you cannot read a claim until you know what each one actually certifies. GRS/RCS certify content, OEKO-TEX STANDARD 100 product safety, and ZDHC and bluesign the chemical input.

Knowledge

Digital Product Passport (DPP) & ESPR: What It Means for Textiles

The EU’s ESPR regulation and the Digital Product Passport (DPP) change what a fabric buyer will ask a supplier for: scope, timeline, data fields, and why a vertically integrated mill is structurally ready.

Knowledge

Manufacturing & Machinery

20 guides

From PTA to Yarn: Inside a Polyester Polymer Plant

Every 100% polyester fabric begins where PTA and MEG meet as a melt inside a petrochemical plant. From esterification to melt polycondensation, the chip route versus the direct-spin (melt-direct) line, and the real licensors who build it — here is how industrial scale actually works. The resulting chip is defined by intrinsic viscosity (ASTM D4603 · ISO 1628-5) and melt flow index (ISO 1133).

Knowledge

Bright, Semi-Dull, Full-Dull: Lustre Is Decided in the Polymer Plant

A polyester fabric’s lustre is set not at the dyehouse but by the amount of TiO₂ delustrant blended into the polymer melt. This guide explains the three lustre classes — bright, semi-dull, full-dull — and how each changes opacity, hand, depth of shade, and UV behaviour. The effect of lustre shows again in the ISO 105 fastness series and in UV protection (AATCC 183).

Knowledge

POY, FDY, HOY: The Filament Spinning Line and Its Speed Regime

The machine chain that turns PET melt into filament — from spin beam to high-speed winder — and how take-up speed alone separates POY, FDY and HOY. With real OEM series and typical ranges. The three regimes are separated by ISO 2060 (linear density) and ISO 2062 / ASTM D2256 (tenacity).

Knowledge

From POY to DTY: The False-Twist Texturing Machine

The draw-texturing machine converts flat, low-bulk POY filament into stretchy, bulky DTY. Its sequence of draw zone, heater, cooling, false-twist unit and intermingling jet sets the yarn’s bulk, stability and torque, and therefore the hand of the finished fabric. The resulting DTY is verified for tenacity to ISO 2062 / ASTM D2256 and linear density to ISO 2060.

Knowledge

DTY, ATY and ACY: Which Textured Yarn for Which Fabric

Three families of textured yarn — false-twist crimp (DTY), air-jet loop (ATY/Taslan) and elastane-core air-covered (ACY) — deliver different hand, stretch and end-use. This guide separates the production logic of all three and shows which is right for sportswear, swimwear and linings. All three are measured to ISO 2060 and ISO 2062 / ASTM D2256; the difference is not in the numbers but in the crimp mechanism.

Knowledge

Before the Yarn: How Polyester Staple Fibre (PSF) Is Made

Behind spun yarn sits a separate industry: melt-spin, gather into tow, draw, crimp in a stuffer-box, cut to length. An honest engineering look at virgin versus recycled (bottle-flake) PSF, and at hollow-conjugate siliconised fibrefill. Staple tenacity is measured to ISO 2062 / ASTM D2256.

Knowledge

Ring, Rotor, Vortex and Compact: Spun Polyester Yarn Systems and Pilling

There are four ways to spin staple polyester yarn — ring, rotor (open-end), air-jet/vortex and compact — and each one sets the hand, strength, hairiness and, most critically, the pilling behavior. The real OEMs (Rieter G/K/R/J, Saurer Autocoro 11, Murata VORTEX 870) and the engineering logic behind each. The difference between the four shows in hairiness and pilling — measured with Martindale and the ISO 12945 series.

Knowledge

Gauge, Stitch Length and GSM: How Fabric Weight Is Set on the Knitting Machine

Fabric weight (g/m²) is not a slogan but a measurable outcome that three machine settings — gauge, stitch length and yarn count — lock in together on the knitting machine. This guide shows that GSM is a function of yarn count and stitch length, expressed as a published model and NOT a fixed constant. The result is verified by weighing to ASTM D3776 / ISO 3801.

Knowledge

The Circular Knitting Machine: Single-Jersey vs Double-Jersey Architecture, OEMs and Production Ranges

Most industrial 100% polyester greige fabric is formed on large-diameter weft circular knitting machines. This guide opens the machine architecture (single vs double plate), the real OEM series, and typical ranges for diameter, gauge, feeders and rpm through an engineer’s lens. The greige output is weighed to ASTM D3776 / ISO 3801 and inspected under the ASTM D5430 four-point system.

Knowledge

Knit Defects: Spirality, Barré and Holes — Root Cause and Control

Knit defects such as spirality, barré, holes/needle lines/drop stitch and slubs are not random; each has a traceable root cause in the yarn, the machine setup or finishing. Positive feed, correct gauge, stenter heat-setting and 4-point inspection are how these defects are prevented or caught. Spirality is measured to AATCC 179 / ISO 16322; defects are scored under the ASTM D5430 four-point system.

Knowledge

Tubular or Open-Width? The Take-Down Route and Why It Matters

Fabric leaving a circular knitting machine is either processed as a tube or slit at one edge into open-width. That single choice governs the finished fabric’s identity — from crease-free disperse dyeing and stenter heat-setting to edge marks, width and hand. The cost of that choice shows in dimensional stability — measured to AATCC 135 / ISO 6330.

Knowledge

Beyond Circular Knitting: Warp Knitting and Weaving

There are three routes to polyester fabric, and the circular (weft) knitting most knit suppliers know is only one. Warp knitting (tricot/raschel, globally dominated by KARL MAYER) and weaving (water-jet/air-jet looms) take over for linings, mesh, lace, automotive and technical fabrics — this guide explains when each one wins and compares weft-knit vs warp-knit vs woven. The three outputs are measured by different standards: ASTM D5430 in knits, ISO 13934 tensile and ISO 9237 air permeability in wovens.

Knowledge

Tricot or Raschel? A Warp-Knit Selection Guide

Tricot is fine, closed and fast (linings, swimwear, shapewear); raschel handles open structures, lace, net and 3D spacer. We compare the KARL MAYER HKS (tricot) and RSE/RD (raschel) families by gauge, speed and fabric target. The difference between the two becomes numeric in air permeability (ISO 9237) and weight (ASTM D3776 / ISO 3801).

Knowledge

Why Polyester Filament Loves the Water-Jet Loom

Hydrophobic polyester filament is the natural partner of the water-jet weaving loom: it needs no sizing, it allows very high weft-insertion speeds, and it opens the lowest-cost route for filament wovens such as linings, microfibre and taffeta. Air-jet and rapier are the right tools for other cases. The resulting woven is measured for tensile to ISO 13934, tear to ISO 13937 and air permeability to ISO 9237.

Knowledge

Warp Knitting’s Hidden Superpower: 3D Spacer Fabric

A double-needle-bar raschel machine (KARL MAYER RD / HighDistance) knits two separate fabric faces and joins them with vertical monofilament pile in a single pass — building a breathable, three-dimensional cushion that neither weaving nor weft knitting can make. A spacer’s real claim is air permeability, measured to ISO 9237.

Knowledge

Jet, Soft-Flow, Airflow: Understanding the Polyester Dyeing Machine

The type of polyester dyeing machine — overflow/jet, soft-flow, airflow (aerodynamic) and package/beam for yarn — sets a dyehouse’s water, energy and crease economics. Here we explain liquor ratio (LR) and how low-LR airflow machines cut consumption. The machine type shows up in liquor ratio, ZDHC compliance and ISO 105 fastness grades.

Knowledge

What a Stenter Really Does: A Heat-Setting Guide

A stenter (ramöz) is the heat-setting frame that permanently locks a polyester knit’s width, weight, hand and dimensional stability — while padding the chemical finish in the same pass. This guide explains the typical 180–210 °C setting window, width and overfeed control, the chemical pad, and the pre-set vs post-set decision from an engineer’s view.

Knowledge

Compacting & Residual Shrinkage: How Compactors Lock In Dimensional Stability

A knit fabric wants to relax from the moment it leaves the machine; compacting performs that relaxation in advance under controlled overfeed, locking width and residual shrinkage to a typical commercial spec of ~3–5%. This guide explains why a knit relaxes, how a compactor fixes it, and what separates compacted from uncompacted fabric. Residual shrinkage is reported through ISO 3759 marking, ISO 6330 laundering and ISO 5077 calculation.

Knowledge

The Looms Behind a Roll of Polyester — A Stage-by-Stage Machinery & OEM Reference

The real machine builders (OEMs) and series behind 100% polyester knit fabric — from the polymer plant through spinning, knitting, dyeing and finishing — in one big reference table, with verified brand/series names and labelled engineering ranges. Each step has its own standard: ISO 2060 / ISO 2062 in yarn, ASTM D5430 in fabric, ISO 105 in fastness.

Knowledge

The Whole Polyester Chain in One Table: Typical Engineering Ranges

We collect the typical engineering ranges of the entire 100% polyester production chain — from fibre IV to the 4-point acceptance threshold — into a single reference table; every value is labelled typical/representative and tied to a standard where one exists. Every range in the table is tied to a standard: ASTM D4603 for IV, ASTM D2256 for tenacity, ASTM D5430 for inspection.

Knowledge

Supply Chain & Industry

8 guides

From Chip to Cloth: The Value Chain and Where the Margin Sits

Maps the full polyester chain from PX to garment and its two separate truths: margin sits mostly in the oil-linked upstream commodity spreads, while lead-time and quality risk concentrate in the wet processing and inspection a fabric mill actually owns. Shows why vertical integration (knit + dye + finish under one roof) turns this to advantage. At the last link of the chain, quality is measured by ASTM D5430 inspection and ISO 105 fastness.

Knowledge

Where the World’s Polyester Actually Comes From: Producers and the Value Chain

Polyester is the world’s largest textile fibre (~59% share, ~78 Mt in 2024). Your yarn is the last link in an integrated chain that runs from oil refinery to fibre — this guide maps that chain and the real producers who run it. The fabric at the end of that chain is delivered under ASTM D5430 inspection and ISO 105 fastness.

Knowledge

Turkey’s Polyester and Knit-Dye Industry: Upstream Depth, Clusters and the Structural Moat

Turkey is one of the few vertically integrated textile economies, running from petrochemicals (SASA’s PTA plant, Korteks’s integrated filament) down to the knit-dye belts of Çorlu/Ergene, Bursa, Gaziantep and Denizli. Its edge is not cheapest volume but speed and replenishment, built on the Customs Union’s 0% duty and 3-5 day truck delivery.

Knowledge

STeP, ZDHC, Higg, bluesign: What Facility Certifications Actually Prove

A product certificate documents a fabric; a facility certificate documents a factory — they answer different questions. A buyer must hold this distinction to read OEKO-TEX STeP, ZDHC, Higg/Cascale FEM, bluesign and ISO 14001/50001 correctly.

Knowledge

The Water and Energy in One Kilo of Dyed Polyester Knit

The real water and energy cost of one kilo of dyed polyester knit — honest, representative ranges and the levers that actually cut them: low-liquor/airflow dyeing, heat recovery, right-first-time shade, ETP + RO recovery, and ZLD. Auditing that cost runs through ZDHC, OEKO-TEX STeP and ISO 14001.

Knowledge

The 4-Point Inspection System: How a Fabric Lot Gets Approved

How 4-point fabric inspection works under ASTM D5430 — defects scored 1-4 by size, a cap of 4 points per linear yard, normalised to 100 yd², and common acceptance thresholds — together with the in-house lab gate that completes it (ISO 105 fastness, ISO 3801 weight, ISO 6330/5077 dimensional stability, spectrophotometer ΔE).

Knowledge

What Really Sets MOQ and Lead Time: Dye-Lot Math

What sets the minimum order quantity and lead time for a colour is not knitting capacity; it is the economics of the minimum dye lot that fills a machine, plus the lab-dip approval cycle. All week and quantity figures are representative. The approved lot passes ASTM D5430 four-point inspection and ISO 105 fastness checks.

Knowledge

Knit Mill or Garment Manufacturer: Choosing in Turkey

Supplier lists collapse two different businesses into one heading: the mill that turns yarn into fabric, and the garment manufacturer that buys fabric and sews clothing. They sell different things, price in different units and carry different risk. This guide separates them, shows why “vertically integrated” no longer carries information on its own, and reduces the choice to six questions.

Knowledge

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