Mechanical Greaseproof Paper Grade Selection for Bakeries and Fast Food Packaging
Optimize mechanical greaseproof paper selection by specifying 80-88 SR refining and 15000+ s Gurley porosity to secure non-PFAS grease resistance.
ISO 8295 Coefficient of Friction
Friction Mechanics
Measurement protocols define the force required to slide one surface against another under specified load and speed conditions. The iso 8295 coefficient of friction provides a standardized quantification of this resistance, specifically addressing plastic films and sheets with a thickness below zero point five millimetres.
Measurement Procedures
Operators place a weighted sled of known mass onto the test substrate mounted to a horizontal plane. A motor pulls this sled at a constant speed, recording the resistive force generated at the interface between the two surfaces. Static values represent the initial peak force necessary to initiate motion, while kinetic values reflect the steady force required to maintain sliding contact at uniform velocity.
Variations in polymer density or additive concentration directly influence the output of this process. High static values indicate a tendency for material layers to adhere, which disrupts automated high speed packaging lines. Conversely, excessive kinetic friction generates heat that threatens to deform heat sensitive films during processing.
Calibration of the sled mass remains the primary control for ensuring reproducible results across different testing laboratories.
Technical Application
Packaging engineers rely on these values to predict how substrates behave during storage and conversion. Printed materials with specific surface coatings or lamination textures require precise friction profiles to prevent bag shifting on shipping pallets or misfeeding in vacuum suction equipment. Converters verify that the surface finish of a product meets the frictional parameters defined by the filling line machine specifications.
Stable frictional characteristics prevent mechanical jams in vertical form fill seal operations. Rigid adherence to the defined test environment minimizes data scatter caused by ambient humidity changes during measurement. Consistent data allows for the accurate simulation of product handling in automated distribution chains.