Window Film Release Liner
- Material: clear silicone coated PET liner
- Thickness: 19 um, 23 um, 36 um, 50 um
- Appearance: clear or ultra clear, low-haze surface
- Release side: one-side silicone release surface
- Roll format: jumbo roll or precision slit roll
- Main use: window film coating, lamination, slitting
Clear Adhesive Film Company is a manufacturer of Window Film Release Liner for window film production and roll-to-roll coating lines. This clear silicone coated PET liner is supplied in 19 um, 23 um, 36 um, and 50 um grades for PSA adhesive coating, transfer coating, lamination, slitting, rewinding, and low-haze inspection. It protects the adhesive layer while helping teams identify streaks, particles, bubbles, silicone voids, edge contamination, and missing coating before final roll processing.
Product Overview
Window Film Release Liner is used inside window film manufacturing, where acrylic PSA adhesive is coated, dried, laminated, inspected, slit, rewound, and later separated from the liner. It is not a decorative privacy film, safety glazing film, UV-control window film, or direct glass protection material. Its working role is narrower and more technical: protect the adhesive surface, keep peel behavior stable, and help the web run cleanly through production.
The PET base film gives the liner flatness, transparency, and heat resistance during coating and drying. Compared with paper liner or softer plastic liner, polyester film is better suited for clear window film structures where low haze, surface cleanliness, and defect visibility affect production approval. In downstream converting, the liner should unwind without adhesive split, liner curl, edge waving, blocking, or unstable peel noise.
Before repeat production, the liner should be tested with the actual PSA adhesive, coating weight, drying temperature, lamination tension, storage time, and converting speed. Release force is often checked by 180-degree peel at 300 mm/min, or by an agreed internal method. A short trial may pass, but aging, tight rewinding, or high-speed slitting can still change peel behavior, so retained sample comparison is useful.
Benefits
- Stable release force helps reduce sudden peel change during coating, lamination, slitting, and rewinding.
- Low-haze PET liner makes adhesive coating and inline inspection easier to review.
- Good silicone anchorage helps reduce silicone transfer risk and supports residual adhesion checks.
- PET film flatness helps limit tension marks, optical distortion, and uneven contact during lamination.
- Clean slit edges help reduce edge lift, dust entry, blocking, telescoping, and roll-end damage.
- Custom release force, width tolerance, core size, release side, and winding direction can match different window film coating lines.
How Can Low-Haze PET Release Liner Support Defect Inspection During Window Film Production?
A low-haze PET release liner gives window film converters a clearer view of adhesive coating before defects move into lamination, slitting, or finished-roll packing. Under transmitted or reflected light, operators can check coating streaks, particles, bubbles, silicone voids, edge contamination, missing adhesive areas, and lamination marks more easily. For sample approval, also review haze, roll flatness, coating-side identification, and stable unwind during inspection-speed trials.
TDS
Item | Typical Value |
Product type | Window Film Release Liner for window film production |
Structure | PET base film with one-side silicone release coating |
PET thickness | 19 um, 23 um, 36 um, 50 um, grade dependent |
Appearance | Clear or ultra clear, low-haze inspection surface |
Release force | 5-80 g/25 mm reference, confirmed by adhesive, peel angle, peel speed, dwell time, and test method |
Peel test | 180-degree peel, 300 mm/min or agreed internal method |
Haze | Low-haze grade for adhesive coating inspection |
Residual adhesion | Checked to review silicone transfer risk |
Subsequent adhesion | Confirmed after coating, lamination, storage, and liner removal |
Heat shrinkage | Checked after heat exposure such as 150 C for 30 min |
Roll width | Jumbo width or custom slit width |
Width tolerance | +/-0.5 mm to +/-2 mm reference, confirmed by final width |
Core size | 3 inch or 6 inch paper core |
Winding direction | Release side in or release side out |
Inspection items | Streaks, bubbles, particles, silicone voids, missing coating, edge contamination |
Sample approval | Trial roll and retained sample comparison before repeat production |
Production Line
Applications
- PSA adhesive coating for automotive window tint film production
- Adhesive transfer coating for solar control window film structures
- Lamination support for clear PET window film materials
- Slitting and rewinding of self-adhesive window film rolls
- Optical inspection before final roll converting
- Trial roll testing and repeat-order control for window film converters
What Should Be Checked Before Using Window Film Release Liner in Adhesive Coating and Lamination?
Before coating or lamination, match release force with the PSA adhesive system, coating weight, drying condition, and rewind tension. Easy release may cause adhesive shifting, while tight release may cause adhesive split, poor unwind, or tension marks during slitting. Also check silicone anchorage, low silicone transfer, residual adhesion, thickness consistency, slit-edge quality, core size, winding direction, and clean separation after storage.
Loading Details
FAQ
What is Window Film Release Liner used for?
It is a PET release liner used during window film adhesive coating, lamination, slitting, rewinding, and inspection. It protects the PSA adhesive before liner removal.
Is it the same as installed window film?
No. This product is a production liner for window film manufacturing. It is not a privacy film, safety film, solar-control film, or direct glass installation film.
How should release force be selected?
Select release force by adhesive chemistry, coating weight, drying condition, lamination tension, storage condition, and converting speed. A 180-degree peel test at 300 mm/min can be used as reference.
Can the liner be customized for different production lines?
Yes. Thickness, release force, roll width, tolerance, core size, winding direction, release side, and slit-roll format can be adjusted after trial roll approval.
