Key Features:
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Automated Sled Placement: Integrated elevator system ensures simultaneous surface contact, removing human variability.
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Real-Time Data Analysis: View COF curves and data instantly via the digital display or store in common file formats.
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Multi-Standard Compliance: Supports ASTM D1894, ISO 8295, ISO 15359, and TAPPI standards with interchangeable sleds.
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Precision Control: Features a variable speed drive and adjustable pause times for highly customized testing parameters.
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Versatile Applications: Ideal for assessing stack stability, sliding resistance, and registration errors in paper and plastic.
The Automated Coefficient of Friction Tester can measure Static COF. It does this from a resting position and continues to move testing surfaces in a relative motion. As a result it gives an accurate kinetic COF result.
The Automated Coefficient of Friction Tester employs a moving sled with a stationary table. The table has a clamping system preventing slippage of the test piece during a test. The sled is lowered onto the table by means of an elevator system. Thus, it places the sled so as both test surfaces meet simultaneously. Therefore, eliminating any operator error which may influence the results of the test.
The accurate COF data obtained by using the C.O.Friction Tester aids in assessing problem situations such as:
- Roll winding problems (e.g. crepe wrinkles, dishing, telescoping)
- Web tracking problems and print register
- No feed or multiple feed during sheet feeding (e.g. printing, envelopes or cartons)
- Registration errors in die cutting or converting.
- Corrugation problems of several kinds.
- Sliding on conveyor when product should not, or vice versa.
- Stack or Pallet stability (e.g. cartons, sheets, sacks, printed material.)
Frequently Asked Questions (FAQs)
What is the difference between Static and Kinetic COF?
Static COF measures the force required to initiate movement between two surfaces at rest. This is critical for assessing stack stability and ensuring that products like cartons or sacks don't slide off pallets. Kinetic (or Dynamic) COF measures the force required to maintain a constant motion once sliding has begun, which is vital for smooth operation on high-speed packaging lines.
Why is an automated elevator system important for testing?
Manual placement of the weighted sled can lead to inconsistent results due to human error, such as "dropping" the sled or applying uneven pressure. An automated elevator system lowers the sled onto the table with precision, ensuring the surfaces meet simultaneously and consistently every time.
Which international standards does the IDM COF Tester comply with?
The instrument is engineered to meet a wide range of global standards, including ASTM D1894 (Plastic Film and Sheeting), ISO 8295 (Plastics - Film and Sheeting), ISO 15359 (Paper and Board), and various TAPPI and DIN methods.
Can I test different materials besides plastic film?
Yes. While widely used for plastic films, the tester is equally effective for paper, sheeted materials, cardboard, coated surfaces, and textiles. Interchangeable sleds are available to suit specific testing requirements for these different materials.
How does environmental humidity affect COF results?
Surface friction is highly sensitive to environmental conditions. High humidity can cause certain materials to "stick" more, increasing the COF. It is recommended to perform tests in a controlled environment to ensure repeatability and compliance with standard conditioning requirements.