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Technical data

Elasticord

Elasticord is selected for a specific machine, product path and process requirement. Parameters are confirmed with samples and customer-side tests.

Discuss the specification
A raw-material property is not a finished-product test result

Material data supports preliminary selection. Product behaviour also depends on construction, diameter, finish and process conditions. Critical applications require tests and documentation for the exact variant.

MAL-EL-001

Elasticord — braided elastic core

Data sheet PDF

Manufacturer-declared, document review pending · Specification and availability require confirmation.

Identification and construction

Construction
Braided elastic core
Variant materials
Polyester PET + Elastic core
Diameter for specification
1–3 mm
Cover-yarn linear density · tex / dtex
To be confirmed for the cover yarn, separately from the complete cord's linear density.
Finished-product linear density · tex
Nominal value and tolerance to be confirmed.
Cover and core construction
Carrier count, yarns per carrier and core construction to be confirmed. PLY does not describe the complete braid.
Twist · S/Z · TPM
For component yarns, where applicable. The braid is not specified as a final S/Z ply twist.
Colour
to specification
Winding
machine-ready winding, spool

Finished-product performance

Breaking force
To be confirmed for the exact variant
Elongation
Up to 90% (manufacturer declaration; method not published)
Length per unit mass
To be confirmed for the exact variant
Operating temperature
To be confirmed for the exact variant
Food contact
Declared on Malkop website; compliance file pending review

Materials and application limits

Polyester PET

A low-moisture thermoplastic fibre for wet and technical uses away from oven heat and flame.

Heat
Moderate heat; variant test
Flame
Melts and may drip
Moisture absorption
Low
  • Polyester can soften and melt at elevated temperature.
  • Melting temperature is not a service-temperature limit; time, load, moisture, crystallinity and construction all matter.
  • Do not recommend it for wicks, oven use or smoking.
Material evidence
Commercial moisture regain
0.4% commercial regain reference. This supports low moisture uptake directionally but is not a finished-product water-resistance rating.Commercial mass and directional comparison only.
PET melting peak in cited DSC samples
Approximately 255-259 C peak melting temperature in the cited PET fabric samples. This is not a safe working-temperature limit.Material identification and hazard context only. Service temperature must come from finished-product testing under load and exposure time.
Combined humidity and temperature degradation
PET hydrolytic degradation depends on temperature, humidity, crystallinity and molecular orientation; low moisture regain alone is not sufficient evidence for hot-wet service.Use to trigger a steam or hot-wet product test, not to approve a variant.
Thermoplastic response to heat and flame
Polyester can shrink, melt and drip under flame exposure. The exact behaviour depends on construction and additives.Hazard communication only; not a classification of a Malkop product.

Elastic core

The functional Elasticord core for automatic tying. Chemistry and thermal behaviour require supplier data for the exact core.

Heat
No heat applications
Flame
Core degrades; supplier data required
Moisture absorption
Low
  • The exact core chemistry and thermal behaviour require supplier data; no universal melting statement should be made.
  • The elastic core is not intended for high-temperature use.
  • Automatic-machine use requires a trial on the target machine.
Material evidence
Elasticord application and declared stretch
Malkop identifies Elasticord as an elastic rubber thread for automatic winding machines and declares stretch up to 90%; the definition and test method require confirmation for the ordered variant.Commercial scope only. Confirm force, set, recovery, construction and method for the exact product.
Finished Elasticord test-method gate
ASTM D2731 covers elastomeric yarn tests but excludes covered, wrapped and core-spun yarns from its published scope. A method for the finished Elasticord construction must therefore be agreed and validated.Test-planning requirement; not a finished-product performance result.
Documentation and parameter verification plan

Approval for a particular application requires an approved specification, tests and documents. This sheet is not a certificate.

Agreed finished-cord cyclic tensile method, ASTM D2731 as a benchmark only after scope review, Machine trial with the customer's tying equipment

TDS-MAL-EL-001
Request a sample of this variantSend requirements

Yarn count and twist

Ne / Nm, linear density in tex, ply count and S/Z twist with TPM describe different product characteristics. Finished-cord diameter is specified separately.

For elastic cords, we also specify the core construction, number of braid carriers and yarns per carrier. A single PLY value does not replace these details.

Textile designations and the Ne 6/3 example
NeEnglish cotton count
Number of 840-yard hanks per pound of yarn. Higher count means lower linear density, not diameter in mm.
NmMetric count
Metres of yarn per gram. Nm and Ne are different systems; Nm 6 is not the same as Ne 6.
tex / dtexLinear density
tex: grams per 1,000 m; dtex: grams per 10,000 m. 1 tex = 10 dtex. State whether the value applies to a component yarn or the finished product.
PLYNumber of component yarns
Number of yarns combined at a given plying stage. Specify each stage of a cabled construction separately; ply is not the number of individual fibres.
S / ZTwist direction
Direction of the twist. For plied yarns, distinguish the component-yarn twist from the final plying twist.
TPM · turns/mTwist level
Turns per metre. TPI means turns per inch; 1 TPI ≈ 39.37 TPM. S or Z alone does not specify the twist level.
N / cN/texBreaking force / tenacity
Force at break and force relative to linear density. Comparison requires consistent test methods and conditions.
%Elongation at break
Change in length at break. This is not the same as an elastic cord's working extension.

Designation example, not a MALKOP product specification

Ne 6/3: three Ne 6 singles, or 3 PLY. Each single is approximately 98.4 tex; the nominal total is approximately 295.3 tex before twist contraction. By comparison, Nm 6 is approximately 166.7 tex.

Conversions: tex ≈ 590.6 / Ne (cotton); tex = 1000 / Nm. Yarn count does not convert directly to cord diameter.

Terminology references: CottonWorks: Ne, tex, Nm, PLYISO 2061Safilin: Nm, PLY

CALC / VARIANT DATA

Engineering calculators

METERS → KGDATA REQUIRED
NUMBER OF SPOOLSDATA REQUIRED
MONTHLY METERSDATA REQUIRED
MONTHLY SPOOLSDATA REQUIRED

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