Protective Film Rolls Company is a China PET release film manufacturer supplying PET release liner systems for adhesive converting. The range includes silicone and non-silicone coatings on PET carriers, with single-sided, double-sided, and differential-release grades. These liners control peeling in tape converting, label stock, die-cut adhesive parts, and protective film lamination. Before bulk production, agree the release level, coated side, roll format, and converting conditions.
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China PET release film is more than polyester roll stock. It is a release-control carrier used to keep adhesive materials stable through slitting, rewinding, laminating, die cutting, and matrix stripping. PET thickness is selected from a 25-188 um reference range according to stiffness and web handling. Roll flatness, coating consistency, and clean slit edges matter because local variation can affect unwinding and waste removal. As a silicone release liner supplier, Protective Film Rolls Company matches the PET carrier and coated surface to the process.
The range includes silicone coated PET release film for routine pressure-sensitive adhesive converting and non-silicone release film where silicone transfer needs closer review. Single-sided grades suit materials with one adhesive-facing surface. Double-sided liners are used when both faces may contact tacky layers during winding or lamination. Differential-release grades combine an easy side with a tighter side so the adhesive remains on the intended surface during unwinding, liner replacement, and transfer. Selected grades can include anti-static treatment or identification colors after evaluation.
Start with the adhesive system and converting sequence, not thickness alone. For label stock, review liner stiffness, die-cutting support, and stripping stability. For double-coated tape or transfer adhesive, specify which side should release first and how the roll will unwind. For protective film lamination, review silicone-contact risk and subsequent adhesion after ageing. For wholesale PET release film supply, provide the adhesive chemistry, release sequence, core size, slit format, and winding direction. Agree the peel angle, peel speed, dwell time, temperature, and humidity for sample evaluation.
Release force should not be treated as a stand-alone number. A light-release grade may release more tightly than expected when the adhesive, peel speed, peel angle, dwell time, or ageing condition changes. Whenever possible, test the silicone release polyester film with the actual tape, label adhesive, die-cut component, or laminate. A 180-degree peel angle can serve as a reference method, but record peel speed and dwell time as well. Review residual adhesion after liner contact alongside release force. For silicone-coated grades, inspect coating anchorage, pinholes, incomplete coverage, and transfer risk before scaling up.
Item | Typical Range / Customizable Value |
PET carrier thickness | 25-188 um reference range; select by stiffness and converting process |
Roll width | Slit width or jumbo-roll width to match equipment; tolerance to be agreed |
Roll length | Grade-dependent; select by thickness, outer diameter, and line-change frequency |
Core size | 3 inch or 6 inch reference options; match unwind and rewind equipment |
Coating chemistry | Silicone release coating / non-silicone release coating |
Coating structure | Single-sided / double-sided / differential release |
Release-force grade | Light / medium / heavy / tight release; test method to be agreed |
Differential-release sequence | Specify easy side, tight side, winding direction, and peel order |
Peel test reference | 180-degree peel angle or agreed method; record peel speed and dwell time |
Residual adhesion | Review subsequent adhesion after liner contact and ageing comparison |
Surface review | Inspect coating uniformity, anchorage, pinholes, and incomplete coverage risk |
Roll quality | Review flatness, slitting-edge quality, joints, and release-side labeling |
Supply format | Jumbo rolls / slit rolls / sheets |
Functional option | Anti-static treatment or identification color, subject to evaluation |
Protective Film Rolls Company can adjust PET carrier thickness, coating chemistry, release level, width, length, core size, color, roll format, and winding direction to suit the converting line. PET silicone release liner specifications should identify the coated side, easy side or tight side, slit-roll orientation, and unwind direction. For repeat China PET release film supply, retain the approved sample in the batch record. Where unwinding or matrix stripping is sensitive, review flatness, slit-edge quality, joint count, and adhesive-trial results.
Single-sided liner suits one adhesive-facing surface. Double-sided liner is more practical when both surfaces may contact adhesive during winding, storage, or lamination. Differential release is useful when the adhesive must stay on one designated side during unwinding, slitting, die cutting, or liner replacement. The final choice should follow the adhesive construction, peel order, winding direction, and line operation.
Provide the adhesive type, application, PET thickness, release side, target release grade, roll size, core, winding direction, and converting process.
Anti-static treatment can be evaluated for selected grades when handling, slitting, or die-cutting conditions require static control.
Use the approved sample as the reference and keep the release side, winding direction, slit width, core size, agreed test conditions, and retained-sample record consistent.
Yes. Standard test tape is useful for screening, but actual adhesive trials are more reliable for checking peeling, transfer risk, laminating behavior, and matrix stripping.
