Protective Film China Company is a silicone release film supplier manufacturing PET silicone release film and liner grades for pressure-sensitive adhesive materials. The range includes single-side, double-side, and differential-release structures for labels, tapes, electronic adhesive materials, medical patches, and die-cutting. PET thickness, coated side, release profile, roll width, core size, and winding direction are matched to the adhesive system, removal sequence, storage condition, and converting equipment.
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A PET silicone release liner must hold the adhesive layer through conversion and storage, then release cleanly at the planned step. PET is preferred where smooth feeding, low shrinkage, and roll flatness matter.
Nominal thickness and color are only starting points. Review release force with residual adhesion, silicone-transfer observations, coating uniformity, and slit-edge condition. Easy hand peeling may still lead to early release during rewinding or matrix stripping. Excessive tightness can slow dispensing or disturb final removal. Sample approval should use the actual adhesive construction.
Product Series | Structure and Selection Focus | Typical Processing Scenarios |
Single-Side PET Silicone Release Film | Silicone coating on one PET surface; release-side marked | Labels, single-sided tapes, die-cut carrier layers |
Double-Side Silicone Release PET Film | Controlled release coating on both PET surfaces | Rewound adhesive materials, multilayer conversion |
Differential Release PET Liner | Easy side and tight side with different release levels | Double-sided tapes, transfer tapes, self-wound rolls |
Low Silicone Transfer Grade | Available for evaluation where transfer observation is required | Electronic adhesive materials, medical patch processing |
Die-Cutting Grade PET Liner | Thickness stability, roll flatness, slit-edge quality | Labels, precision die-cut parts, adhesive components |
Anti-Static Optional Grade | Available according to grade and application requirement | Electronics converting and dust-sensitive processes |
A siliconized polyester release liner can be supplied as a sample roll, slit roll, sheet, or jumbo roll. Larger batches should follow the approved sample and winding setup.
The correct silicone release liner film depends on adhesive chemistry, coating weight, peel sequence, dwell time, storage condition, line speed, and removal method. A light-release grade may simplify manual peeling but increase pre-release risk during controlled unwind or waste-matrix removal. A tighter grade can stabilize conversion but make final peeling less efficient.
Adhesive or Process Condition | Recommended Starting Direction | Checks Before Bulk Approval |
Acrylic pressure-sensitive adhesive | Single-side or double-side PET liner with matched release | Peel speed, dwell time, residual adhesion, edge lifting |
Rubber-based adhesive | Stable coated PET liner with application-specific release | Blocking risk, storage aging, coating uniformity |
Double-sided tape or transfer adhesive | Differential release PET liner | Easy-side / tight-side order, rewinding, final removal |
Precision die-cutting and waste stripping | Die-cutting grade PET silicone release liner | Flatness, thickness stability, slit edges, feeding, matrix lifting |
Electronic adhesive materials | Low silicone transfer grade with stable PET base | Transfer observation, dust control, anti-static need, batch consistency |
Medical patch processing | Smooth PET liner evaluated with the actual adhesive system | Silicone transfer, residual adhesion, cleanliness, retained sample |
Check adhesive compatibility through an agreed release profile rather than one peel value. Record peel angle, peel speed, dwell time, aging condition, winding direction, core size, and slit width before repeat production.
Release-force data alone is not enough for precision die-cutting approval. Trial the actual adhesive construction, coating weight, dwell period, peel direction, die-cutting speed, and waste-stripping route. Watch for adhesive picking, liner tearing, edge lifting, or frequent tension changes. Compare the outer layer, middle layer, and near-core section of the roll. Record thickness stability, roll flatness, slit-edge condition, residual adhesion, and silicone-transfer observations before production.
Item | Typical Range / Customizable Value |
Base Film | PET polyester film |
Product Structure | Single-side coated / double-side coated / differential release |
Typical PET Thickness | 12-188 um, grade-dependent reference |
Silicone Coating Side | One side / two sides |
Release Level | Light / medium / tight / customized |
Differential Release | Easy side / tight side combination |
Release Profile | Review peel angle, peel speed, adhesive type, dwell time, and removal stage |
Residual Adhesion / Subsequent Adhesion | Evaluate with agreed adhesive system and test method |
Silicone Transfer | Low-transfer grade available for evaluation |
Coating Uniformity | Check edge-to-center consistency across usable roll width |
Silicone Anchorage | Review by coating chemistry and curing condition |
Core Size | Common reference: 76 / 152 mm, match to equipment |
Roll Width | Custom slit width and jumbo-roll width |
Roll Length | Set by thickness, width, core size, and line requirement |
Winding Direction | Release side inside / outside |
Slitting Tolerance | Set by width and downstream equipment |
Roll Flatness | Inspect during sample qualification |
Slit-Edge Quality | Inspect for burrs, edge damage, and telescoping |
Color | Clear / blue / red / yellow / custom tint |
Supply Format | Jumbo roll / slit roll / sheet / die-cut format |
Roll-to-Roll Consistency | Compare retained sample, approved specification, and batch record |
As a silicone release film supplier, Protective Film China Company can adjust PET structure, release level, slit-roll dimensions, core size, winding direction, and supply format for the intended line. For trial approval, specify adhesive type, expected peel behavior, process speed, storage period, liner-removal step, and unwinding setup.
Tie sample qualification to an approved specification and retained sample. For repeat batches, check coated-side labeling, roll number, slit width, and intended process. Where low silicone transfer or anti-static treatment is required, agree the test method before bulk slitting.
A standard double-side coated liner is suitable when both PET surfaces need controlled release. A differential-release PET liner is better when the two sides must behave differently. The tight side can hold the adhesive layer through conversion. The easy side then supports smoother removal in the next step. Check the combination through adhesive trials, peel-speed testing, storage aging, winding-direction review, and line testing.
Share the adhesive type, intended release behavior, roll specification, winding direction, converting process, storage condition, and final application.
Yes. Share the required slit width, tolerance, core size, roll length, release-side direction, roll flatness, and unwinding requirements.
Yes. Compare release force, residual adhesion, silicone-transfer observations, and roll-position consistency after the agreed dwell period and storage condition.
Yes. Test the actual adhesive construction during lamination, slitting, die-cutting, and waste stripping before repeat production.