Direct answer
What the test measures
COF testing per ASTM D1894 measures the static (start) and kinetic (sliding) friction of film against itself or another surface; results relate to slip and are used to predict and control feeding, stacking and winding behavior in packaging.
- Static & kinetic COF is terminology a buyer may see in a specification, report, or machine discussion.
- ASTM D1894 is terminology a buyer may see in a specification, report, or machine discussion.
- slip is terminology a buyer may see in a specification, report, or machine discussion.
Why a buyer might care
COF predicts feeding, stacking and winding behavior on the line.
The useful part is knowing which question this concept can help answer before comparing documents, requesting data, or planning a trial.
What it does not automatically tell you
A result describes the material and conditions tested. It does not by itself establish shelf life, approve a package for a product, or set a universal acceptance limit.
Boundary: This page organizes buyer and project information. It does not approve a film structure, gauge, barrier target, seal condition, food-contact position, shelf life, recyclability claim, machine setting, or supplier for a specific application.
Questions to ask
- Which method, material, orientation, and conditions does this information apply to?
- Is the value a typical result, a controlled specification, or an application requirement?
- Who owns approval when the package, machine, product, or process changes?
- What sample, report, specification, or machine record should stay with the decision?
Source and next reference
The source lineage for this page is preserved below. Use it to identify the relevant standard, OEM explanation, or trade reference; obtain the current full standard or controlled supplier document when the decision depends on it.
Related work
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