Coefficient of friction test

A print factory needed to test the packaging material they were using in order to improve their processes and establish optimum machinery settings. The company sought a solution, which provided consistent results and reliable performance. Mecmesin advised the company to use a coefficient of friction test to determine the 'slip' properties of the packaging.

A coefficient of friction test identifies the frictional values of materials and how different material surfaces relate to one another. For example, if the coefficient if too high, the material cannot be fed through all the machinery efficiently, causing misfeeds.

Solution

Mecmesin supplied a Coefficient of Friction (COF) test system, capable of measuring both the static and kinetic coefficient of friction values. The test is performed by pulling a flat block of known mass across the material located upon a flat table. Both the peak force required to initiate movement (static), and the average force required to maintain movement (kinetic) are accurately and repeatedly measured to determine the coefficients.

This test solution employs a MultiTest-i system, which is controlled via a PC. The software enables a graphical representation of the test to be plotted on screen, with automatic calculation of static and kinetic coefficients of friction.

This provides further data regarding the materials surface structure and frictional properties including 'stiction' (when the surface judders during dynamic slip).

The test provided the company with valuable information from which they could optimise their processes, such as machinery timing. Anomalies that may have caused poor performance in the past were easily identified resulting in increased production line efficiency, whilst minimising the risk of misfeeds.

System

Coefficient of Friction Test System solution includes;

  • MultiTest-i computer-controlled test system
  • Horizontal test table
  • Sled of known mass
  • Test hook

See also

Cosmetic packaging pull-off test

Cosmetic packaging pull-off test

A bench-top testing system was required to repeatably test the pull-off force on a variety of cosmetic containers. The system needed to allow a relatively high volume of containers to be tested with the minimum level of training required for users. Mecmesin's solution avoided the risk of damaging the loadcell by excessive torque on tightening the collet grip, and the lipstick barrel was first inserted in the grip and then connected to the gauge by a flexible chain-link.

Ice cream container lid closing effort

Ice cream container lid closing effort

Food packaging made from thermoformed plastics and intended for freezing, requires testing to ensure optimum functionality when closing and sealing the container. The closing effort of the lid is measured by using a motorised force tester controlled by software together with a custom-designed fixture to hold standard-sized ice cream tubs. In addition the ‘top-load’ crush strength of the container itself can also be tested on the same machine to guarantee it is rigid enough to avoid buckling and spillage when the lid is applied.

Mecmesin develops Combi Cork-i Extraction Tester for leading Scottish whisky

Mecmesin develops Combi Cork-i Extraction Tester for leading Scottish whisky

To improve the quality and storage of a premium product, the R&D team at a leading Scottish whisky maker needed to optimise the design of their bottle stoppers. They decided that the strength and performance of their reusable stoppers could be ensured by systematic testing of the characteristics of both portions of the stoppers. Working closely with the R&D team, Mecmesin developed the Combi Cork-i Extraction Tester, an innovative multi-function cork extraction testing system that tests both phases of de-corking synchronously.

Greek beauty product manufacturer guarantees production quality by updating to Mecmesins digital torque testers

Greek beauty product manufacturer guarantees production quality by updating to Mecmesin's digital torque testers

A manufacturer of a wide range of skin, hair-care, make-up and sun-care products based in Greece needed to replace their outdated torque testers with up-to-date digital torque testers to guarantee production quality and to ensure their products remained sealed. Mecmesin supplied the company with two Tornado 10N.m digital torque testers, which have the ability to test tamper-evident closures, an intrinsic part of their specification.

  • Isabel Thomas
  • Product Info
  • English
  • Created 07 Mar 2019
  • Modified 11 Jun 2019
  • Hits 90