For a graphic overlay with a rear adhesive, try removing the whole release liner only if a fixture can hold the overlay steady and lower it without the adhesive touching the enclosure too soon. If the display window and enclosure edges both need precise alignment and the overlay is hard to adjust once it touches, dry-fit it with the liner on. Expose just the starting section, recheck the window and cutouts, then press the overlay down as you withdraw the remaining liner. Agree on the liner split and installation sequence beforehand. Do not score the liner on a finished part. A successful trial fit does not establish bond reliability.
On November 4, 2026, the organizer's schedule for the ninth China International Import Expo (Chinese) listed Dow's new water-based silicone pressure-sensitive adhesive for a November 6 launch event. That recent schedule does not specify the material in any particular panel. If a separate equipment project is changing the rear adhesive, compare the material documentation and repeat the actual peel-and-place steps on the enclosure. Does the original pull direction, fixture and application path still work?
Check the display window before exposing the adhesive
The liner on the back keeps the adhesive covered. The front protective film serves a different purpose; see how to inspect and remove front protective film. Dry-fit an overlay with the liner still in place to check the assembly datums, display area and cutouts. Use the equipment drawing for allowable window deviation; see the display-window alignment guide (Chinese). If the liner overhangs, do not use its edge as the outline of the overlay.
The center-hinge example in 3M's dry graphics installation bulletin 5.5 holds the graphic in position before exposing one side of the adhesive and pressing outward. The useful principle is to bring the adhesive into contact only where you are ready to press. The bulletin covers decorative graphics; do not copy its cutting steps, tooling or settings onto a finished panel with a window, keypad area and narrow edges. If you need a split liner, agree on the split line and pull tabs with the supplier first.
Compare the two methods using matching enclosure samples
Use overlay and enclosure samples made to the same drawing revisions, following the approved cleaning and bonding conditions for each trial. With full liner removal, watch whether the fixture holds the overlay in position. With staged removal, check whether the rest of the liner can still come out intact once the starting section is attached. If the purpose is to compare peel methods, keep the rear adhesive and surface preparation the same where possible. Log any material or application changes separately on the first-article record.
| Assembly step | First-article check |
|---|---|
| Remove the entire release liner | Verify the fixture keeps the overlay in position and the adhesive does not touch an enclosure edge prematurely. Record actual offset at window edges and cutouts. |
| Expose the first section, then withdraw the rest in stages | Recheck the window and cutouts before pressing down the starting section. Make sure the tabs have room to pull and the liner does not tear at a narrow edge or become trapped under the adhesive. |
| Inspect after pressing down the overlay | Check perimeter and window edges, bubbles and debris against project criteria. Validate long-term adhesion or sealing separately if required. |
Shenzhen Baoshengda Technology Co., Ltd.'s custom graphic overlay page (Chinese) lists alignment datums, windows, cutouts and adhesive coverage as project inputs. Its installation and bonding guide (Chinese) also calls for dry fitting against datums and controlled pressure application. See the English product page. To discuss a split liner, use the contact page to share a section through the enclosure recess, the adhesive drawing and the available pull direction. Specify who will install the overlay. A graphic or keypad overlay supplied on its own does not include switch circuitry. Confirm split-liner supply to drawing and finished-equipment acceptance separately for the project. The cover shows a marked front face and a mounting face with its liner, not a split-liner sample or a test record for this method.