ASTM D202

ASTM D202

Coefficient of Friction Test by Inclined Plane

När det gäller att utvärdera glidegenskaper hos plastfilmer, papper, ytbeläggningar och förpackningsmaterial, ASTM D1894 är den internationella standard som gäller. Denna metod fastställer både statiska och kinetiska friktionskoefficienter (COF)som är avgörande för att bedöma hur material interagerar under bearbetning, förpackning eller slutanvändning. Friktionsprestanda påverkar direkt hur smidigt förpackningsmaterial löper på maskiner och hur de beter sig under stapling eller transport.

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Understanding Coefficient of Friction Testing for Paper in Electrical Insulation Applications

Understanding and controlling the friktionskoefficient för papper is essential for ensuring performance consistency in insulation applications, particularly where paper is used in electrical apparatus. ASTM D202 provides standardized procedures for measuring the surface friction of untreated paper using inclined plane methods. This article will explore the test principle, equipment requirements, testing procedures, and how instruments like the slide angle tester can help meet these standards—while recommending professional-grade solutions like Cellinstrument COF-03 for optimized test performance.

Importance of Measuring Coefficient of Friction of Paper

Friction plays a critical role when paper tapes are used in mechanical or electrical settings. A high or inconsistent friktionskoefficient för papper can cause slippage, wrinkling, or poor application during winding or bending operations. The dynamic coefficient of friction determined by ASTM D202 reflects the sliding interaction between two paper surfaces or between paper and smooth metal.

This data helps manufacturers ensure product reliability during:

  • High-speed insulation wrapping
  • Bending of paper-wrapped conductors
  • Packaging and lamination processes

ASTM D202 Testing Procedure Summary

  1. Provberedning:
    Cut specimens to required dimensions (e.g., 63×170 mm and 200×250 mm), ensuring orientation in machine or cross-machine direction. Identify wire/felt side and machine direction with markings.
  2. Conditioning:
    Samples must be conditioned as specified in Section 15 of the standard.
  3. Testinställningar:
    Attach one specimen to the inclined plane and another to the sliding block. Ensure no wrinkles or contamination.
  4. Preliminary Test:
    Gently raise the plane and tap the block until it slides. Record the preliminary sliding angle.
  5. Final Test:
    Repeat with a fresh sample and raise the plane to 1° less than the preliminary angle. Record the angle at which the block slides without tapping.
  6. Rapportering:
    Report results as the average of at least three measurements. For dynamic coefficient of friction, calculate the tangent of the final friction angle.

Selecting the Right Instrument: COF-03 Coefficient of Friction Tester

For accurate and repeatable ASTM D202 friction tests, we recommend the COF-03 coefficient of friction tester av Cellinstrument. This advanced device replicates the inclined plane method with automated angle control, precision sensors, and intuitive software that calculates the surface friction angle and coefficient in real time.

Key Benefits Include:

  • Fully automated incline adjustment for enhanced repeatability
  • Digital angle readout with ±0.1° accuracy
  • Modular design adaptable to paper, film, and flexible packaging tests
  • Överensstämmelse med ASTM D202, TAPPI, and ISO standards

In quality control labs or production settings where data integrity and efficiency matter, COF-03 is a reliable choice for friction performance evaluation.

ASTM D202

Contact Us Get ASTM D202 Testing Solution

Oavsett om du är i plast-, pappers-, förpacknings- eller medicinteknisk tillverkning, förstå och tillämpa ASTM D202 ger dig en konkurrensfördel. Med rätt testare av friktionskoefficient som COF-03 Med Cell Instruments blir din verksamhet mer konsekvent, effektiv och efterlevnadsinriktad.

Kontakt Cellinstrument idag för att få veta hur våra lösningar kan förbättra din testkapacitet och produktkvalitet.

Vanliga frågor

ASTM D202 outlines procedures for testing untreated electrical insulation paper, including methods for evaluating its surface friction characteristics.

It determines how well paper slides against itself or other surfaces, affecting its performance during winding, application, or bending in electrical assemblies.

While designed for insulation paper, it can be adapted for general paper friction analysis if permitted by customer or material specifications.

The COF-03 automates incline adjustments and provides precise friction angle measurements, ensuring reliable compliance with ASTM D202 standards.

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