COF Testing Standards and Measures

COF testing measures the convenience with which two surfaces in contacts can slide through each other where there are two different values ​​related to friction coefficients - static and kinetic. Static friction applies to the style needed to initialize the movement between two surfaces and kinetic friction is resistance to slid after the surface in relative movement.

Because the cleanliness of the substrate is very important to collect reliable data, the right steps must be addressed before testing and being taken to when testing ensures freedom from dirt, oil and other contaminants that can affect test results.

ASTM D1894 is the main COF testing standard and used by many industries whose needs are very varied.

Friction test coefficient

New equipment in our laboratory will help food manufacturers evaluate the characteristics of friction from their food and beverage packaging, which is very relevant to the use and handling of packages.

The friction coefficient (COF), or slip resistance, is a significant problem in the world of packaging and is an important property of all the materials running on high-speed printing and packaging lines. COF is routinely determined in materials such as cartet and plastic film containers. Understanding and controlling COF packaging materials provides the processor and packaging the ability to optimize performance and avoid problems in forming, filling, transporting, and even storing packages.

Cologne containers that show high COF will tend to resist sliding in the load unit, while low coefficients can cause potential problems, with packages slipping from the load. For plastic films, low COF values ​​may be conducive to the speed of fast charging lines, while high coefficients may be the cause of abrasion, blisters and jammed films on the phone.

COF Effects in the Packaging Industry

The packaging film "friction coefficient" (COF) provides a relative indication of friction characteristics. Control the COF provides the processor of the ability to optimize performance and avoid problems in forming, transportation, and storage packages.

In the HFFS system (form horizontal fill and seal), too much friction side sealant film can cause drilling or jamming films when passing the metal plate.

In the VFFS system (Form Vertical Fill and Seal), too much friction from the side of the film sealant can cause poor film feedback on a metal-forming collar, the size of the package is inconsistent, and screaming. In both systems, too much friction can cause lateral slips that lead to bad seals (leakers).

Too a little friction outside can cause the package to slip or fall from the conveyor belt tend. Too much friction outside can slow down the shipping launch package down, or too a little friction outside can produce packages that glide from the stack or palette.

You can see that various applications require different fictional properties. Therefore, the coefficient of friction or COF testing is very important and used for process control to ensure consistent production of packaging types.