SIST EN 14278-2:2004

Textiles - Determination of cotton fibre stickiness - Part 2: Method using an automatic thermodetection plate device

This standard describes an automatic technique to simulate the tendency of "contaminated" cotton fibres to stick to working surfaces of textile machines (e.g. card clothing, drafting rollers, crush rolls).
Test specimens can be raw cotton fibre  (fibre sampled, e.g. from a bale), or opened fibre, slivers, etc.

Textilien - Bewertung der Klebrigkeit von Baumwolle - Teil 2: Verfahren mit dem automatischen Platten-Thermodetektionsgerät

Diese Europäische Norm legt ein automatisches Verfahren zur Simulierung der Neigung von mit Klebesubstanzen befallenen Baumwollfasern fest, an Arbeitsflächen von Textilmaschinen (z. B. Kardengarnitur, Streckwerken, Querwalzen) zu kleben.
Dieses Verfahren gilt für Messproben von Fasern von Rohbaumwolle (z. B. aus einem Ballen entnommene Fasern) oder geöffnete Baumwollfasern, Baumwollfaserbänder usw.

Textiles - Détermination du collage des fibres de coton - Partie 2: Méthode utilisant un dispositif automatique de thermodétection a plateau

La présente Norme européenne décrit une technique automatique permettant de simuler la tendance des fibres de coton « contaminées » à coller aux surfaces de travail des machines textiles (par exemple, garniture de carde, rouleaux étireurs, cylindres broyeurs).
Les éprouvettes peuvent être constituées de fibres brutes de coton (fibres échantillonnées à partir d'une balle, par exemple), de fibres ouvertes, ou de rubans, etc.

Tekstilije - Ugotavljanje lepljivosti bombažnih vlaken - 2. del: Metoda z avtomatsko napravo s ploščo za toplotno zaznavanje prisotnosti

General Information

• Status: Published
• Publication Date: 30-Jun-2004
• ICS: 59.060.10 - Natural fibres
• Technical Committee: ITEK - Textile and textile products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jul-2004
• Due Date: 01-Jul-2004
• Completion Date: 01-Jul-2004
• Ref Project: EN 14278-2:2004 - Textiles - Determination of cotton fibre stickiness - Part 2: Method using an automatic thermodetection plate device

Overview

EN 14278-2:2004 specifies an automatic thermodetection plate device test method for assessing cotton fibre stickiness. The method simulates the tendency of "contaminated" cotton fibres to adhere to working surfaces of textile machines (e.g. card clothing, drafting rollers, crush rolls). It is applicable to raw cotton (sampled from a bale), opened fibre, slivers and similar test specimens.

This standard provides a reproducible, instrument-controlled technique to detect and count "sticky points"-places where fibres remain attached to an aluminium foil after heat and pressure treatment-allowing textile laboratories and mills to evaluate stickiness potential and mitigate machine adhesion issues.

Key Topics

• Principle

  • A weighed cotton sample is opened into a pad, placed on aluminium foil and subjected to a heated pressure plate followed by an ambient pressure plate. Loose fibres are removed and remaining entanglements are counted as sticky points using image analysis.

• Apparatus (automatic system components)

  • Pad preparation (opener roller and condenser) producing a pad ~(222 ± 30) cm².
  • Heated pressure plate: underside area (192 ± 1) cm², heated to (53 ± 2) °C; applied force (1700 ± 150) N for (25 ± 2) s.
  • Ambient pressure plate: same force/time as heated plate to fix sticky points to foil.
  • Pad removal and cleaning: suction removal and rotating cylinder with cleaning fabric to remove loose fibres.
  • Image analysis device: camera and illumination to detect, size and count sticky points (note: example camera resolution given in the standard is 581 × 756 with sensitivity ~3 lux).
  • Balance capable of 0.1 g accuracy and aluminium foil (27–81 g/m²) with a bright face.

• Specimen preparation and conditioning

  • Condition samples per EN 20139 (standard atmospheres) for at least 24 h. Prepare three specimens of 3.0–3.5 g each. Results are the arithmetic mean of three tests.

• Results and statistics

  • Sticky points may be classified as small, medium or large. Annex A notes the distribution is non‑Normal (Poisson or negative binomial tendencies); square‑root transformation may stabilise variance for ANOVA, while log‑linear models suit multifactor experiments.

Applications

• Predict and reduce fibre adhesion to processing equipment
• Evaluate cotton lots for spinning preparation and quality control
• Support troubleshooting for machine stoppages and surface contamination
• Comparative laboratory testing for procurement and supplier assessment

Related Standards

• EN 20139 - Textiles: standard atmospheres for conditioning and testing (referenced for conditioning and testing environment)
• EN 14278-1 and EN 14278-3 - Companion methods using manual thermodetection and rotating drum devices

This method does not identify the specific contaminant (e.g. sugars, coatings) and results are not directly equivalent to sugar-content measurements. Refer to EN 14278 series for alternative devices and to Annex A for recommended statistical treatment of results.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Textilien - Bewertung der Klebrigkeit von Baumwolle - Teil 2: Verfahren mit dem automatischen Platten-ThermodetektionsgerätTextiles - Détermination du collage des fibres de coton - Partie 2: Méthode utilisant un dispositif automatique de thermodétection a plateauTextiles - Determination of cotton fibre stickiness - Part 2: Method using an automatic thermodetection plate device59.060.10Naravna vlaknaNatural fibresICS:Ta slovenski standard je istoveten z:EN 14278-2:2004SIST EN 14278-2:2004en01-julij-2004SIST EN 14278-2:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14278-2March 2004ICS 59.060.10English versionTextiles - Determination of cotton fibre stickiness - Part 2:Method using an automatic thermodetection plate deviceTextiles - Détermination du collage des fibres de coton -Partie 2: Méthode utilisant un dispositif automatique àplateau de thermodétectionTextilien - Bewertung der Klebrigkeit von Baumwolle - Teil2: Verfahren mit dem automatischenThermodetektionsplattengerätThis European Standard was approved by CEN on 24 December 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14278-2:2004: ESIST EN 14278-2:2004

Statistical information.10SIST EN 14278-2:2004

(fibre sampled, e.g. from a bale), or opened fibre, slivers, etc.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications.These normative references are cited at the appropriate places in the text, and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publications apply tothis European Standard only when incorporated in it by amendment or revision. For undated references thelatest edition of the publication referred to applies (including amendments).EN 20139Textiles - Standard atmospheres for conditioning and testing (ISO 139:1973).3 Terms and definitionsFor the purposes of this European Standard, the following terms and definitions apply.3.1stickiness levelnumber of sticky points indicating the severity of cotton fibre stickiness3.2sticky pointsentanglement of one or more fibres that become attached to a working surface as a result of contamination ofthe cotton by sticky substance3.3thermodetectionaction of revealing sticky points through the combined application of heat and pressure3.4padthick homogeneous web of fibres formed by a special fibre opening and condensing device3.5removerdevice for removing the non sticking fibres from the aluminium foil4 PrincipleA weighed fibre sample is processed through an opener to obtain a pad. This pad is placed on an aluminiumfoil and subjected to pressure by two separate pressure plates, one after the other. The first pressure plate ismaintained at a temperature significantly higher than ambient. The second pressure plate is maintained atambient temperature. The pad is removed from the foil and all loose fibres are cleaned away. Any fibreentanglements left sticking to the foil are noted and counted as sticky points. All the operations and resultanalysis are computer controlled.SIST EN 14278-2:2004
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