PET Film Supply Company is a PET release liner film supplier for adhesive converting processes that need stable peeling and clean separation. Our release coated polyester film range includes silicone-coated, non-silicone, single-sided, double-sided, and differential-release PET liners for PSA labels, adhesive tapes, transfer adhesives, and precision die cutting. Each grade is selected around the adhesive chemistry, target peel behavior, line speed, and downstream process instead of thickness alone.
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Release coated polyester film is more than a transparent PET carrier with a non-stick surface. Performance depends on the balance between the polyester base film, release coating, adhesive layer, and winding quality. A well-matched siliconized polyester release liner should unwind smoothly, stay flat after slitting, and separate cleanly during lamination, rewinding, die cutting, and matrix stripping. Thickness selection should follow the adhesive structure and converting conditions. For repeat production, residual adhesion, slit-edge condition, and roll flatness are just as important as the nominal gauge.
The range covers single-sided silicone-coated PET liner for general PSA processing, double-sided liner when both faces need controlled separation, and differential-release liner when peeling order matters. Non-silicone grades are used when silicone migration could interfere with bonding, printing, or clean converting. Fluorosilicone grades may be evaluated for silicone PSA systems. Clear, low-haze, matte, colored, and antistatic options can be evaluated for specific converting conditions.
Start with the adhesive system and how the liner moves through the line. Acrylic PSA, rubber-based adhesive, hot-melt adhesive, silicone PSA, and transfer adhesive do not behave alike. A pressure sensitive release liner for high-speed matrix stripping should be checked with a defined 180-degree peel method at the actual line speed, not only by hand. Double-sided coating should not be mistaken for differential release: the latter controls which face releases first. Width, core size, winding direction, slit-roll tolerance, and edge condition should match the equipment.
These problems are not always caused by PET thickness. Adhesive transfer may come from incomplete coating coverage, an unsuitable release level, or poor compatibility with the adhesive layer. Curl may be related to coating balance, winding tension, storage conditions, or a narrow slit width. Before repeat production, compare low-speed release, high-speed release, and aged-release results. Residual adhesion should be reviewed if silicone migration or cure level could affect the adhesive after liner contact. Narrow slit rolls should be checked for roll flatness and slit-edge stability before repeat orders.
Item | Typical Range / Customizable Value |
Base Film | PET / BOPET polyester film |
Coating System | Silicone / non-silicone / fluorosilicone |
Coating Side | Single side / double side / differential release |
Thickness | Common reference: 12-125 um; specialty grades subject to confirmation |
Width | Jumbo-roll width and slit width confirmed by grade and equipment |
Release Level | Ultra-light / light / medium / heavy / tight release |
Release Force | Project-specific target; measure under the agreed 180-degree peel condition and verify with the actual adhesive, peel speed, and aging requirement |
Surface Options | Clear / low haze / matte / colored / antistatic |
Roll Format | Jumbo roll / slit roll / narrow reel / sheet |
Core Size | Common reference: 3 inch / 6 inch |
Winding Direction | Record coating side and unwind direction before production |
Slitting | Width tolerance and slit-edge inspection agreed by roll size and equipment |
Performance Checks | Initial release / aged release / low-speed peel / high-speed peel / residual adhesion |
Converting Fit | Lamination / rewinding / die cutting / matrix stripping / clean converting |
PET Film Supply Company can match thickness, coating system, release level, surface finish, roll width, slit width, core size, winding direction, and supply format to the converting setup. Common core references are 3 inch and 6 inch. The production brief should state adhesive type, target peel behavior, line speed, storage period, roll dimensions, and tolerance. For repeat wholesale silicone release film orders, approval on the actual adhesive structure is better than choosing by color or thickness alone. This matters when release coated polyester film remains laminated during storage before die cutting or final use.
Material and coating records also affect how easily used liner can be separated after converting. Review our PET release liner recycling guide before establishing a collection and waste-identification process.
Use a single-sided liner when only one release surface is needed. A double-sided silicone release film liner is suitable when both faces need controlled separation. Differential-release film is the better choice when the two sides must peel in a set order, particularly for transfer adhesives and double-sided tapes. A non-silicone liner may be needed when silicone transfer could affect downstream bonding. For silicone PSA systems, evaluate a fluorosilicone coating if a standard silicone coating cannot provide reliable release.
Check the target with the actual adhesive, 180-degree peel condition, line speed, aging requirement, and converting process. Hand peeling alone is not enough for high-speed production.
Use it when silicone migration or residue could affect bonding, printing, electronics-related processing, or clean converting.
Provide the adhesive sample and the line conditions used during converting. Roll dimensions, winding direction, core size, and tolerance should also be recorded for repeat orders.
Yes. Slit-roll and narrow-reel formats can be evaluated by width tolerance, edge stability, roll flatness, and equipment requirements.