Release Coating Polyester Film
- Material:PET polyester film
- Coating side:Single side, double side, or differential A/B side
- Coating system:Silicone, non-silicone, or fluoropolymer release coating
- Thickness:25–188 μm common range
- Color:Clear, translucent, milky white, or customized appearance
- Release force: 3–150 gf/in, adjusted by adhesive system
PET Film Supply Company is a manufacturer of release coating polyester film for adhesive coating, lamination, and converting work where the release surface must stay stable on PET film. The film can be supplied with single side coating, double side coating, or differential A/B side coating, using silicone, non-silicone, or fluoropolymer release systems. Instead of treating it as a standard silicone coated polyester film, we control release force, coating uniformity, residual adhesion, and adhesive compatibility around real processing conditions.
Product Overview
A release coated PET film should not be chosen only by thickness, color, or appearance. In adhesive coating work, the important point is whether the release profile stays predictable after aging, slitting, lamination, die cutting, rewinding, and storage. PET Film Supply Company controls PET film flatness, coating anchorage, curing condition, coating weight, and roll tension, so the release layer works as part of the adhesive structure, not only as a removable liner.
Silicone release coating is commonly used with acrylic adhesive, rubber-based adhesive, and many pressure-sensitive adhesive systems because it offers a wide release range and stable processing. A non-silicone release film or fluoropolymer release surface is more suitable when silicone transfer, later bonding, surface coating, or adhesive cleanliness must be controlled. For silicone adhesive systems, ordinary silicone release surfaces may cause unstable peeling, adhesive pick-up, or lower residual adhesion, so the release chemistry should be tested before scale-up.
Single side coating is used when one adhesive surface needs protection. Double side coating is used for roll separation or double-contact structures. For differential A/B coating, both the easy side and tight side should be checked after winding, not only on flat samples, because roll pressure can change the real peeling feel.
After converting, silicone, non-silicone, and fluoropolymer-coated PET waste should not automatically be combined. Use our guide to qualifying coated PET liner waste before mixing trim, setup rolls, or used liner in one recycling batch.
Benefits
- Controlled release force:Release can be adjusted from easy to tight release, usually within about 3–150 gf/in, and checked after aging, slitting, and different peel speeds.
- Adhesive compatibility:Acrylic, rubber-based, silicone, and hot melt adhesive systems can be reviewed through 180° peel, residual adhesion, rub-off, adhesive transfer, and surface checks.
- Lower transfer risk:Proper curing and coating anchorage help reduce silicone transfer, adhesive pick-up, ghost marks, and residual adhesion loss.
- Stable coating uniformity:Edge-to-center control helps reduce local tight spots, noisy peeling, tearing, and uneven adhesive contact.
- Flexible coating structure:Single side, double side, and differential A/B coating can be matched to different adhesive constructions.
- Factory testing:Typical residual adhesion targets are kept at ≥85–90%, with release force reviewed after initial peeling, short aging, and converting simulation when needed.
What Release Coating System Fits Your Adhesive Structure?
The release coating system should match the adhesive chemistry, peeling target, coating side, and converting process. Silicone coating works well for many pressure-sensitive adhesive systems, but it is not always the safest choice. Some structures need non-silicone or fluoropolymer coating when silicone contamination may affect bonding, printing, surface coating, or adhesive cleanliness.
A practical release system is not defined only by “easy release” or “tight release.” It should keep consistent peeling after aging, slitting, lamination, and different peel speeds. During sample review, we compare 180° peel value, residual adhesion, rub-off condition, adhesive transfer, and whether the adhesive surface stays smooth after liner removal.
Applications
- PSA coating lines where the liner must keep stable peel after winding and aging
- Process liner for adhesive film lamination and transfer structures
- Controlled release filmfor die cutting, slitting, and temporary adhesive protection
- PET release linerfor adhesive structures requiring cleaner surface contact
- Non-silicone interface film for silicone-sensitive bonding or coating processes
- Trial liner for adhesive systems that need release testing before scale-up
- Differential A/B side liner for adhesive constructions requiring two release levels after winding
How Does Coating Uniformity Affect Release Force Control?
Coating uniformity directly affects release force because adhesive does not touch an “average” surface. It touches every coated area across the roll. If coating weight or curing is uneven, one area may peel smoothly while another becomes too tight, sticky, noisy, or unstable during rewinding and die cutting.
Poor uniformity may cause adhesive transfer, local tearing, ghost marks, lower residual adhesion, or a rough adhesive surface after peeling. In production, we check PET surface smoothness, coating anchorage, winding tension, edge-to-center release variation, and lot-to-lot consistency. For wide rolls, edge and center samples should be compared before slitting.
TDS
Item | Typical Specification / Control Point |
Base Film | PET polyester film |
Product Type | PET-based release coated film |
Coating System | Silicone, non-silicone, fluoropolymer optional |
Coating Side | Single side, double side, or A/B differential release |
Thickness Range | 25 μm, 36 μm, 50 μm, 75 μm, 100 μm, 125 μm, 188 μm |
Release Force | Approx. 3–150 gf/in, adjustable by adhesive and test condition |
Residual Adhesion | Typical target ≥85–90% after release contact test |
Width Range | Commonly 300–1600 mm, slit width available |
Roll Length | 500–6000 m depending on thickness and winding requirement |
Surface Appearance | Clear, smooth, clean coating surface |
Coating Uniformity | Controlled across web width to reduce local tight release and edge-to-center variation |
Compatible Adhesives | Acrylic, rubber-based, silicone, hot melt adhesive systems after testing |
Common Checks | 180° peel test, aging test, rub-off check, residual adhesion test, adhesive transfer check |
Scale-up Notes | Edge and center samples should be compared before slitting wide rolls |
Final Confirmation | Confirm by adhesive type, peel speed, dwell time, winding pressure, and storage condition |
production line
loading containers
FAQ
Is this film the same as ordinary silicone coated PET release film?
No. This film can use silicone, non-silicone, or fluoropolymer release systems. A standard silicone coated PET release film describes only one coating type, while this product is controlled around release force, coating uniformity, residual adhesion, and adhesive compatibility.
Can the release force be customized?
Yes. Release force can usually be adjusted within about 3–150 gf/in, but the final value should be tested with the actual adhesive, peel speed, dwell time, winding pressure, and storage condition.
Should I choose single side or double side coating?
Single side coating is suitable for one adhesive contact surface. Double side coating is better for roll separation, two-sided structures, or differential A/B release needs.
What should be tested before bulk production?
Peel force, residual adhesion, silicone transfer risk, adhesive transfer, aging behavior, rub-off condition, edge-to-center variation, and coating stability should be checked under real converting conditions.
