PE Protective Film Adhesion Grades: Why 400 g/25mm Is “Low Tack” at One Factory and “Ultra-High” at Another
There is no worldwide standard fixing how many grams of peel force equals “low” or “high” tack. Each supplier grades adhesion relative to its own product range — so 400 g/25mm is “low tack” at one factory and “ultra-high” at another, and both are honestly using the same number.
This article explains the three grading scales you will meet in the market, the difference between coated and self-adhesive film, and — most importantly — why the datasheet number is only a reference and how to specify film so that it actually matches your production line.