Double Side Release Coated PET Film
- Material: PET film with double side silicone coating
- Typical Thickness: 25 um, 36 um, 50 um, 75 um, 100 um
- Color Options: Clear, milky white, blue, red, or matte finish
- Release Design: Equal release or differential release liner
- Common Width: 300-1600 mm, slit roll available
- Main Use: Tape, label stock, foam tape, and die-cut liner
Films Protection Company is a manufacturer of double side release coated PET film for tape, label, foam adhesive, and die-cut converting. The PET film is silicone coated on both sides to give controlled release, with equal release or differential release force options such as easy side 5-30 g/25 mm and tight side 30-120 g/25 mm. It supports stable unwinding, clean adhesive separation, kiss-cutting, matrix stripping, and waste removal in roll-to-roll processing.
Product Overview
Double side release coated PET film is used when both liner surfaces may contact adhesive during coating, laminating, rewinding, slitting, or die-cutting. The PET base provides flatness, tensile strength, dimensional stability, and moisture resistance. Compared with many paper liners, it is less affected by humidity and gives cleaner slit edges through multiple converting steps. If the project description only says polyester film, check PET film and polyester film differences before deciding whether a plain PET film, protective PET film, or double side release coated PET film is actually required.
This film is not only made for easy peel. Equal release works for balanced interleaving and general lamination. Differential release is better when one side should unwind smoothly while the other side holds the adhesive more firmly during cutting, stacking, transfer, or waste stripping.
Release force can be adjusted for acrylic, rubber-based, hot melt, and foam adhesive systems. A typical evaluation uses 180 degree peel testing at 300 mm/min after 24 h dwell. Initial release, aged release, and residual adhesion should be checked together. A typical residual adhesion target is >=90%.
Benefits
- Controlled two-side release: Reduces unexpected sticking during laminating, rewinding, and roll handling.
- Differential release option: Easy side and tight side settings control which side releases first.
- Better roll flatness: PET stiffness helps reduce wrinkles, edge waving, and deformation under tension.
- Lower tearing risk: Higher film strength supports slitting, kiss-cutting, rotary die-cutting, and waste stripping.
- Cleaner separation: Stable silicone anchorage helps reduce adhesive transfer and uneven peeling.
- Testable performance: Release force, residual adhesion, heat shrinkage, and aged release can be checked.
What release force should be specified for double side release coated PET film?
Release force should be selected by adhesive type, coating weight, liner thickness, roll tension, and converting speed. Label stock usually needs moderate release so the matrix can be stripped cleanly without pulling labels away. Foam tape often needs a tighter holding side because thick adhesive layers can lift or shift. As a practical reference, light release may start around 5-20 g/25 mm, medium release may be 20-80 g/25 mm, and tight release can be higher depending on the adhesive.
Production Line
TDS
Item | Typical Value |
Product Type | Double side release coated PET film |
Base Film | PET film |
Coating Type | Double side silicone coating |
Release Design | Equal release or differential release liner |
Thickness Range | 25 um, 36 um, 50 um, 75 um, 100 um, custom available |
Width Range | 300-1600 mm, slit roll available |
Color | Clear, milky white, blue, red, matte optional |
Release Force | 5-120 g/25 mm typical, light to tight release |
Differential Release Option | Easy side 5-30 g/25 mm, tight side 30-120 g/25 mm typical |
Test Condition | 180 degree peel, 300 mm/min, 24 h dwell typical |
Residual Adhesion | >=90% typical with reference adhesive |
Heat Shrinkage | MD <=1.5%, TD <=0.8% at 150 C for 30 min typical |
Tensile Strength | MD >=170 MPa, TD >=190 MPa typical |
Elongation at Break | MD >=90%, TD >=80% typical |
Surface Appearance | Smooth, flat, clean coated surface |
Application Fit | Adhesive tape, label stock, foam tape, die-cutting liner |
Applications
- Double sided tape: Process liner for coating, laminating, rewinding, and slitting.
- Transfer tape: Helps separate adhesive layers cleanly during roll handling.
- Label stock: Supports printing, die-cutting, matrix stripping, and dispensing.
- Foam tape: Suitable for lamination, kiss-cutting, and waste removal.
- Die-cut adhesive parts: Used for rotary die-cutting, flat-bed die-cutting, gaskets, and adhesive components.
- Release test matching: Evaluates liner behavior with actual adhesive formulas.
How does differential release force improve adhesive tape and die-cutting conversion?
Differential release force controls which side of the liner releases first. In adhesive tape converting, the easier side supports smooth unwinding, while the tighter side keeps the adhesive layer in place during laminating, slitting, and die-cutting. This is useful for foam tape and double sided tape, where the adhesive can be thick, soft, or sensitive to tension changes. Release design should be judged with peel speed, peel angle, dwell time, roll pressure, heat shrinkage, and aged release behavior, not by one number alone.
Loading Details
FAQ
Q1: Is this film silicone coated on both sides?
Yes. Both PET film surfaces are silicone coated, with equal or different release force.
Q2: Can it be used for foam tape?
Yes. It suits foam tape lamination, slitting, kiss-cutting, and waste removal.
Q3: How is release force tested?
Commonly by 180 degree peel testing at a defined speed, such as 300 mm/min.
Q4: Can the release force be adjusted?
Yes. Light, medium, tight, and differential release settings can be matched to tape, label stock, foam tape, or die-cutting.
