MINGDA

Para-aramid yarn (aramid 1414)

100% para-aramid (aramid 1414) · Spun Ne 8s – Ne 60s and filament 200D – 3000D · Siro-spun and compact Siro-spun

Our para-aramid yarn family: the high-tenacity, high-modulus aramid for the mills that weave and knit cut-resistant fabric, for glove, sleeve and apron makers, and for reinforcement and composite builders. Supplied as single, two-ply and multi-ply spun yarn and as continuous filament, spun and twisted in our own mill.

  • Roughly five times the strength of steel at equal weight
  • Spun Ne 8s – Ne 60s, plus filament 200D – 3000D
  • Siro-spun and compact Siro-spun, spun and twisted in our own mill

The material

Why para-aramid is a strength fibre first

Para-aramid (aramid 1414) is built from rigid, rod-like polymer chains that pack into a highly crystalline structure. Everything the fibre is known for follows from that one fact: a tenacity of 20–23 g/den, roughly five times the strength of steel wire at the same weight, and a very high modulus, so the yarn carries load instead of stretching away from it. Because the yarn is what the cutter actually meets, that strength reaches the finished gloves, sleeves and reinforcement panels.

The same rigidity explains how the yarn handles. Elongation at break is only 3–4%, so it absorbs energy by resisting rather than extending — which is exactly what makes it effective against cutting and abrasion, and also why a para-aramid fabric feels stiff and boardy beside a softer fibre. The property that gives the cut protection is the property that takes the drape away, and a knitter or weaver has to plan for that rather than fight it.

Thermally, para-aramid is inherently flame resistant: it does not melt, its limiting oxygen index (LOI) is 28–32, and it only decomposes above 450 °C, so it self-extinguishes once the ignition source is removed. Its long-term service temperature is around 180 °C, judged by strength retention — the fibre is engineered to hold tensile properties and heat erodes those first. Read it as a strength fibre with good flame behaviour, not as a heat barrier: insulation is the job meta-aramid does better.

Two limits set the commercial picture, and both matter most at the yarn stage. Moisture regain is low at 3–4%, so the yarn is for outer shells, reinforcement and linings rather than a layer worn against the skin. And colour is effectively fixed in the polymer: para-aramid is practically impossible to piece-dye, so only solution-dyed shades such as natural yellow, black and navy blue are available at the spinning stage. UV resistance is poor as well, so outdoor service needs a covering layer or a coated, laminated build.

How it is made

How we spin it: Siro-spun and compact Siro-spun

We spin our para-aramid yarn with two ring-spinning variants — Siro-spun and compact Siro-spun. Both start from drafted staple fibre, and both attack the same weakness: a spun yarn is only as good as the fibres held inside its body, because every fibre end left on the surface is a defect that later shows up as pilling, a rougher surface and faster abrasion.

In conventional ring spinning a single drafted strand is twisted into yarn, and the twist runs back into a triangular zone — the spinning triangle — where outer fibres can escape before they are bound in. Siro-spun feeds two rovings side by side through the same drafting zone and the same spinning triangle, so the two strands twist around each other as they form. The yarn that comes out is wrapped rather than combed: fewer fibre ends protrude, and the linear density is more even along the length of the yarn.

Compact Siro-spun adds a compacting stage before twisting. A suction or air current draws the fibre ends back into the yarn body and removes the spinning triangle altogether, so nearly every fibre is trapped inside the structure instead of lying loose on the surface. In practice that gives the tightest surface, the highest yarn tenacity of the two routes and the best evenness — the reason it is the route we use where the yarn will be woven or knitted into a fabric whose appearance and abrasion life matter.

The difference is easiest to see downstream. Plainer yarn throws more fly and carries more surface fibres, which turns into a rougher fabric surface, faster pilling and quicker abrasion at cuffs, knees and pocket edges. Compact Siro-spun yarn runs cleaner through the loom or the knitting machine, gives a smoother and denser surface, and holds its appearance longer in cut-resistant service. Yarn properties are measured per production lot, so ask our technical team for the current spinning data for the count and ply you plan to use.

Spinning routes and what each one gives the fabric
Spinning route How the yarn is formed What it gives the fabric
Conventional ring-spun One drafted roving twisted into a yarn; the spinning triangle stays open. The baseline: usable, but hairier and less even, so the fabric surface is rougher and wears faster.
Siro-spun Two rovings drafted and twisted together in the same spinning triangle, then plied. Lower hairiness and better evenness than ring-spun; fewer protruding fibre ends on the woven or knitted surface.
Compact Siro-spun As Siro-spun, with a compacting stage that pulls loose fibre ends back into the yarn body before twisting. The tightest surface, the highest tenacity and the best evenness of the three — our route for appearance-critical fabric.

Measured quality of our para-aramid yarn

Every figure below is a value our own mill recorded in the test report for the model named beside it, quoted as recorded. Spun yarn rows and sewing-thread rows sit apart on purpose: they are different products from different test lots, so read the row label rather than the column when you compare us with another supplier. Where the file name does not match the model inside the sheet, the model the sheet names is the one used here.

Para-aramid is the strength fibre in our range. On the models measured so far, breaking tenacity runs 74.6–88.5 cN/tex, elongation at break 2.88–4.88%, and evenness 7.71–16.73% CVm; the best single result in each row is named beside the range. Low elongation is the point rather than a defect — the yarn resists an edge instead of stretching away from it — and it is why para-aramid yarn is specified where cut resistance and dimensional stability carry the load.

All values are measured per production lot, so the figures here describe what our yarn is delivering now rather than a guaranteed ceiling. Tell our technical team the count and ply you plan to use and we will send the batch test data for it.

Measured quality of Mingda para-aramid yarn and sewing thread
Property Our measured range Best recorded value Source
Breaking tenacity — yarn (cN/tex) 74.6 – 88.5 88.5 (P303YT Ne 30s/3) P303YT.xlsx
Breaking tenacity — sewing thread (cN/tex) 67.4 – 93.4 93.4 (P203FYT Ne 20s/3) P203F.xlsx
Breaking force — yarn (cN) 1108.05 – 9857.2 9857.2 (P204(YT) Ne 20s/4) P204(YT).xlsx
Elongation at break — yarn (%) 2.88 – 4.88 4.88 (P204(YT) Ne 20s/4) P204(YT).xlsx
Elongation at break — sewing thread (%) 3.03 – 4.64 4.64 (P203FYT Ne 20s/3) P203F.xlsx
Evenness CVm% — yarn 7.71 – 16.73 7.71 (P204(YT) Ne 20s/4) P204(YT).xlsx
Tenacity CV% — yarn 2.55 – 11.54 2.55 (P204(YT) Ne 20s/4) P204(YT).xlsx
Twist irregularity CV% — yarn 2.09 – 5.97 2.09 (P204(YT) Ne 20s/4) P204(YT).xlsx

Technical data

Product information

The para-aramid yarns we produce, model by model — the family behind the yarn on this page. Every measured figure names its source.

Para-aramid yarn — the models we produce
Model Composition Count Ply / construction Rating or key property Source
P20YT 100% para-aramid (aramid 1414) Ne 20s Single Breaking tenacity 80.8 cN/tex P20YT.xlsx
P202BH 100% para-aramid (aramid 1414) Ne 20s Two-ply Breaking tenacity 86.3 cN/tex P202BH.xlsx
P202YT-1 100% para-aramid (aramid 1414) Ne 20s Two-ply Breaking tenacity 86.6 cN/tex P202YT-1.xlsx
P204(YT) 100% para-aramid (aramid 1414) Ne 20s Four-ply Breaking tenacity 80.9 cN/tex; breaking force 9857.2 cN P204(YT).xlsx
P25YT 100% para-aramid (aramid 1414) Ne 25s Single Breaking tenacity 79.1 cN/tex P25YT.xlsx
P252BH 100% para-aramid (aramid 1414) Ne 25s Two-ply Breaking tenacity 80 cN/tex P252BH.xlsx
P282YT 100% para-aramid (aramid 1414) Ne 28s Two-ply Breaking tenacity 82.4 cN/tex P282YT.xlsx
P30YT 100% para-aramid (aramid 1414) Ne 30s Single Breaking tenacity 80.9 cN/tex P30YT.xlsx
P302YT 100% para-aramid (aramid 1414) Ne 30s Two-ply Breaking tenacity 84.2 cN/tex P302YT.xlsx
P303YT 100% para-aramid (aramid 1414) Ne 30s Three-ply Breaking tenacity 88.5 cN/tex P303YT.xlsx
P401YT 100% para-aramid (aramid 1414) Ne 40s Single Breaking tenacity 74.6 cN/tex P40YT.xlsx
P402YT 100% para-aramid (aramid 1414) Ne 40s Two-ply Breaking tenacity 77.1 cN/tex P402YT.xlsx
Para-aramid filament yarn 100% para-aramid (aramid 1414) 200D / 400D / 600D / 800D / 1000D / 1200D / 1500D / 2500D / 3000D Continuous filament MD-P200D: 216 dtex, 133 F, 43.7 cN, 20.23 cN/tex Index · 529S 200D report
High-strength heat-resistant para-aramid yarn 100% para-aramid (aramid 1414) On request On request On request Index

The Source column names where each figure comes from: Index is our product information index, the other entries are the specification sheet issued for that model. P401YT is the model named inside the file P40YT.xlsx. Values are measured per production lot, so ask our technical team for the batch data of the count and ply you plan to use. Where a model carries no recorded rating we write On request rather than an estimate.

Made to order

Specification options

Count, ply and composition are set to the fabric you are building; colour is set by the polymer, which for para-aramid means solution-dyed shades.

  • Yellow (natural para-aramid)
  • Black
  • Navy blue
Key specifications
Count range Spun Ne 8s – Ne 60s multi-ply; filament 200D – 3000D
Ply Single, two-ply or multi-ply folded
Composition options 100% para-aramid; Ne 10s – Ne 40s para-aramid wrapped with stainless steel wire or glass fibre
Spinning route Siro-spun or compact Siro-spun
Supply form Cone

Para-aramid takes its colour in the polymer before the fibre is spun, not in a dye bath, so the choice is limited to solution-dyed shades — natural yellow, black and navy blue in regular supply. Tell us the shade and we will confirm it for the count and ply you have chosen.

Para-aramid is sensitive to light; store and use it away from direct sunlight.

Standards and certification

Our products are made to conform to each standard listed below, in the application it is bought for. Where a certificate for a specific standard is required, we arrange testing to the customer's requirement.

  • EN ISO 11612 Heat and flame protective clothing (ISO 15025 flame spread, ISO 9151 convective heat, ISO 6942 radiant heat).
  • NFPA 2112 Flash fire protection for industrial personnel.
  • NFPA 1971 Structural firefighting protective clothing.
  • ASTM F1506 Flame-resistant textile materials for arc-rated clothing.
  • ASTM F1959 Arc rating (ATPV) determination for a material.
  • IEC 61482-2 / NFPA 70E Protective clothing against the thermal hazards of an electric arc, and the workplace standard that calls for it.
  • EN 388 Mechanical risks — the cut, abrasion and puncture tests behind a glove rating.
  • ANSI/ISEA 105 Hand and arm protection, cut levels for the US market.
  • OEKO-TEX® STANDARD 100 Textiles tested for harmful substances.
  • ISO 9001 Quality management system.

Test reports and certificate copies are available from our sales team on request. Standards written for finished garments — EN ISO 11612, NFPA 2112, NFPA 1971 — belong to the garment maker who builds on our material data.

In service

What the yarn is used for

Para-aramid yarn is bought for one purpose above all: to be woven or knitted into fabric that has to resist cutting, tearing and abrasion, and to hold its shape while it does so. The spinning route decides how cleanly the yarn runs on the machine; the count and ply decide the strength the finished fabric reaches.

Para-aramid yarn woven into plain fabric on a loom
Para-aramid yarn woven into 220 g/m² plain fabric — the first product most of our yarn becomes.
Cut-resistant woven fabric built from high-tenacity yarn

Cut-resistant fabric for gloves, sleeves and aprons

High-tenacity yarn resists cutting and abrasion at glass, sheet-metal and fabrication benches, and is why para-aramid is the reference fibre for EN 388 and ANSI/ISEA 105 programmes.

Grey para-aramid twill woven shell fabric for workwear

Woven shells for FR and arc-rated workwear

Plain and twill constructions for outer shells where the garment has to hold its shape, its tear strength and its rating through repeated laundering.

Technical para-aramid textile build used as reinforcement

Reinforcement and technical textile builds

Dimensionally stable yarn for reinforcement plies, tapes and composite substrates, where a stiff, high-modulus fibre is an advantage rather than a compromise.

Frequently asked questions

What is the difference between para-aramid and meta-aramid yarn, and which should I choose?

Para-aramid (aramid 1414) is the strength fibre: 20–23 g/den tenacity, roughly five times the strength of steel at equal weight, a very high modulus and only 3–4% elongation. Meta-aramid (aramid 1313) is the heat and comfort fibre: it chars and insulates instead of melting, and it can be worn against the skin. Choose para-aramid where cut resistance, tear strength and dimensional stability carry the load; choose meta-aramid for thermal protection and next-to-skin comfort. Many protective programmes use both, one in the shell and one in the layer against the wearer.

Is para-aramid yarn inherently flame resistant?

Yes. The flame resistance belongs to the polymer, not to a chemical finish, so it cannot be washed out, worn off or dry-cleaned away. Para-aramid does not melt, it has a limiting oxygen index (LOI) of 28–32 against the 21% oxygen in air, and it only decomposes above 450 °C, so it self-extinguishes once the ignition source is removed. What does change in service is strength rather than flame behaviour: long-term exposure above about 180 °C erodes tensile properties first.

Is para-aramid really five times stronger than steel?

On an equal-weight basis, yes. Para-aramid runs at 20–23 g/den tenacity, roughly five times the strength of steel wire of the same weight, which is why it is used where cutting and abrasion carry the risk. Our own measured yarn tenacity sits between 74.6 and 88.5 cN/tex depending on count and ply. The same structure that produces that strength limits elongation at break to 3–4%, so the yarn resists an edge rather than stretching away from it.

Why does para-aramid yarn come in so few colours?

Because para-aramid is practically impossible to piece-dye. Colour has to be added to the polymer before the fibre is spun — solution dyeing — so the shade range is fixed at the fibre stage and is limited to the shades that are actually produced, such as natural yellow, black and navy blue. This is a property of the fibre, not a supply decision: a dyehouse cannot open the range later. If a programme needs another colour, the shade has to come from the fibre supplier.

Does sunlight damage para-aramid yarn and fabric?

Yes. Para-aramid has poor UV resistance — prolonged direct sunlight degrades the fibre, and the loss shows up as strength rather than as a visible colour change. For outdoor service, specify a construction that shields the para-aramid: a covering layer, a laminated or coated build, or a design that keeps it out of direct exposure. Storage in the mill follows the same rule, which is why our cones and rolls are kept out of direct light.

How do I read a cut-protection rating — EN 388, ANSI or both?

They are two different scales and cannot be converted directly. EN 388 is the European glove and material standard, and its levels are lettered (A to F on the 2016 version, which uses the ISO 13997 TDM test for cut resistance in place of the older coupe test). ANSI/ISEA 105 is the US standard and its cut levels are numbered A1 to A9. A buyer working to both markets has to test to both, which is why we record both where a test exists and write On request where it does not.

What is the service temperature of para-aramid yarn?

Around 180 °C continuously, judged by strength retention rather than by melting or ignition. Para-aramid does not melt at all and only decomposes above 450 °C, but heat erodes its tensile properties before it damages the flame behaviour, so the working limit for a load-bearing yarn is set by strength. Where the requirement is insulation rather than strength at temperature, a meta-aramid yarn is the more suitable choice.

How do I verify the yarn specification before ordering?

Ask for the test report for the production lot. Tenacity, elongation at break, evenness and twist are measured per lot, and the figures on this page are the values recorded for the models named beside them. Where an independent result is needed for your own approval file, third-party test reports can be provided on request.

Let’s talk about your fabric requirements

Tell us the application, the required weight and the standard you need to meet. Our technical team will come back with a matching fabric, the spec sheet and a quotation.

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