Polyethylene Protective Film Technical Data

The density of pe film is a key technical value for polyethylene protective film because it affects GSM, roll weight, coverage area, hand feel and removal stability. For accurate material comparison, density should be reviewed with specific gravity, thickness tolerance, polyethylene film tensile strength, elongation, peel adhesion and clean removal results.  A reliable PE protective film is not defined by nominal thickness alone; it is defined by base-film structure, adhesive force, roll quality and removal behavior after the agreed dwell time.

For a practical workflow using peel checks, edge lifting observation, and timed removal review on glass, see the temporary glass protection film solution.

For projects comparing polyethylene protection with polyester processing film, this PE vs PET film parameter comparison explains how thickness, peel behavior, flatness, and test method should be reviewed together.

Before comparing density, tensile strength, or peel data, an RFQ that identifies the material only as “polyolefin film” should first be clarified; how polyethylene fits within the polyolefin family explains why polymer identification comes before technical-data comparison.

Density of Polyethylene Film

The density of polyethylene film means the mass of film per unit volume, normally expressed as g/cm3. In PE protective film, the final value is influenced by resin type, blend ratio, crystallinity, process additives, color masterbatch, adhesive coat weight and extrusion condition.

Specific Gravity of Polyethylene Film

The specific gravity of polyethylene film compares the mass of a film sample with the mass of the same volume of water. Since water is close to 1.0 g/cm3 under common laboratory reference conditions, PE film specific gravity is usually close to its density value.

Thickness, GSM, Roll Weight and Coverage Data

Thickness is usually listed in um, but thickness alone does not show how heavy a roll will be or how much usable area one kilogram can cover. Density converts film thickness into GSM and roll weight.

Basic calculation logic:

GSM = density x thickness

Yield = 1000 / GSM

Net film weight = width m x length m x thickness um x density x 0.001

The table below uses 0.920 g/cm3 as a practical calculation reference.

A 30 um film gives higher area yield and lower net roll weight, but it needs enough elongation and tear resistance to reduce removal breakage. A 50 um film gives a balanced reference for handling and coverage. An 80-100 um film gives stronger body and puncture resistance, but it increases roll weight and reduces coverage per kilogram.

Actual gross roll weight should separate net film weight, adhesive coat weight, core weight and packing weight. This prevents a heavy core or packaging difference from being mistaken for a film-density change.

TDS / Technical Data Table

Polyethylene Film Mechanical Properties

Polyethylene film mechanical properties should be checked as a data group. Tensile strength shows resistance to pulling force. Elongation shows stretch before failure. Tear resistance shows whether a small edge cut can spread. Puncture resistance shows how the film reacts when force is concentrated on a raised point or sharp edge.

Where PE film will experience refrigeration, cold handling or temperature transitions, use the refrigeration protective film testing guide to connect peel data with actual-surface and temperature-cycle validation.

Adhesion Level and Peel Force Data

Adhesion should be recorded as tested peel force, not only as low, medium or high tack. The test record should state the test panel, peel angle, peel speed, dwell time and conditioning environment.

Peel force can change on different tested substrates even with the same film. Surface energy, surface roughness, coating condition, dust, moisture and temperature can all change the actual peel result. Therefore, peel data should not be compared unless the test conditions are the same.

When peel-force data still needs a practical field check, protective film residue removal on stainless steel explains how to connect test results with removal conditions.

For jobsite protection, renovation coverage and temporary surface masking, compare these values with our construction surface protection films.

When these peel ranges are used to approve glass, stone, coated metal, or plastic panels, the guide to applying peel data in low-tack film approval explains how laboratory values should be combined with actual-surface trials.

Clean Removal and Residue Review

Clean removal is not proven by peel force alone. A film can show acceptable adhesion but still fail if adhesive transfers, the edge curls, or the base film breaks during removal.

FAQ

What is the normal density of PE protective film?

The normal density range is commonly about 0.910-0.965 g/cm3, depending on LDPE, LLDPE, HDPE content, blend ratio, additives and adhesive structure.

Is the density of pe film the same as specific gravity?

No. Density is mass per unit volume, while specific gravity compares the film mass with the same volume of water. For PE film, the values are usually close, but density is better for GSM and roll weight calculation.

How much does a 50 um PE protective film roll weigh?

At 0.920 g/cm3, 50 um PE film is about 46.0 g/m2. A 1 m x 1000 m roll has about 46.0 kg net film weight before adding core weight, adhesive adjustment and packing weight.

What data should be checked before approving PE protective film?

Check density, specific gravity, thickness, GSM, tensile strength, elongation, peel force, clean removal, residue, edge lift, fish eyes, thickness tolerance, roll flatness and retained sample consistency.