Illustration note: Any concept illustration displayed with this article is explanatory artwork, not actual production evidence or a record of product testing or performance.
An extended liner gives the user a margin to grasp when starting liner removal. That margin belongs to the liner; it should not be counted as extra adhesive bonding width. A purchase drawing therefore needs two separate outlines: the tape strip that will remain in the closure, and the liner that will be removed. One undifferentiated “width” can leave buyer and supplier describing different things.
Haoxuan’s Double Sided Extended Liner Tape page identifies a PE film backing, hot melt adhesive on both sides and an extended release liner. It describes easy liner starting and removal as an intended benefit. The checked description does not provide a dimensioned finger-lift drawing. Use the following drawing brief to request a specific geometry rather than assuming the catalog name defines it.
Start with the closure the user will actually handle
Show where the strip sits on the envelope, carton flap or other proposed package component. Identify the two surfaces intended to be joined, the position of the tape before the final closure and the point when the liner is removed. If one party applies the tape and another closes the package later, show both stages.
The important question is whether the intended liner margin remains accessible at the removal stage. A loose roll sample can be easy to grasp while the same margin, placed close to a fold or covered by another component, is difficult to reach. This is a geometry question to investigate on the actual package; a photograph of an unused roll cannot settle it.
Give the end view four explicit dimensions
Prepare an end view across the width of a straight strip. Draw the backing and adhesive area separately from the release liner, using labels or different line styles. Do not rely on color alone to identify the layers. Mark the view as schematic and not to scale if thicknesses are exaggerated for clarity.
- A: tape-strip width. Identify the boundaries of the backing and adhesive coverage. If those boundaries differ in the proposed construction, give them separate dimensions instead of concealing the difference in A.
- W: total liner width. Dimension between the two outside edges of the liner, including any uncoated margin extending beyond the tape.
- L: left-side liner overhang. Define “left” by the view direction shown on the drawing, not by how someone happens to hold the roll.
- R: right-side liner overhang. Show this independently, even if the requested design places the accessible margin on only one side.
For the simple aligned geometry just described, the dimensional check is W equals L plus A plus R. This checks whether the drawing is internally consistent; it does not establish manufacturability. Leave values and tolerances marked “to be agreed” until the supplier has reviewed the actual construction. There is no universal overhang dimension in this brief.
Use the plan view to show which edge is presented
The end view explains the layer widths. A plan view explains how those widths relate to the package. Draw the liner’s outer boundary and the tape-strip boundary along the intended application length. Label the package fold, opening edge and any nearby overlap that could obscure the margin.
Add a leader reading “intended finger-lift edge” to the specific side the user should grasp. Mark the application start and end, the tape placement reference and the direction from which the user approaches. Where the strip turns a corner or ends beside another component, show that detail rather than treating the entire length as identical.
For a one-sided request, identify which side receives the overhang. For a two-sided request, identify both margins and the user’s intended access point. These are requested arrangements for feasibility review. They are not a statement that every arrangement is available from the listed product platform.
Connect the drawing to the supplied roll orientation
A correct strip drawing can still be incomplete if the receiving team cannot identify the intended edge as the material unwinds. Add a roll view showing the unwind direction, the reference face and the liner side. Use an arrow and an identified viewing direction; “left overhang” alone can reverse meaning when the roll is turned around.
Ask the supplier to confirm how the proposed roll will be identified and which orientation matches the buyer’s application route. Include relevant core, roll length and equipment constraints in the inquiry, while keeping them separate from the finger-lift dimensions. The tape converting guide provides a broader checklist for that finished-format discussion.
Review an identified sample at the removal stage
Link the sample to its supplier reference and the drawing revision being evaluated. Place it on the intended package component using the agreed application procedure. Confirm which liner margin is presented after the preceding assembly or packing steps. If the review uses a substitute package, record the substitution.
Ask the intended user to demonstrate the planned liner-removal step under representative handling conditions approved by the buyer. Record whether the designated edge can be found, reached and started, and whether removal proceeds as intended. Describe any obstruction by its location, such as a fold covering the marked margin, instead of immediately assigning a cause to the adhesive.
Keep these handling observations separate from the closure’s bonding review. An accessible liner edge does not prove a stronger seal, tamper evidence or acceptable transit performance. Those requirements need their own agreed evidence on the identified package and tape construction.
Record the decision without hiding unresolved geometry
A compact approval record should contain the following:
- Package drawing and tape drawing references, including revision and view direction.
- Confirmed tape width, liner width and left and right overhangs, with agreed tolerances.
- Accessible edge, application position and roll orientation.
- Sample identification and any difference from the quoted production format.
- Observed liner-access and removal results, with annotated photographs where useful.
- Separate closure-performance status, outstanding questions and approval owner.
If a dimension changes after sampling, identify it explicitly and ask whether the earlier review still applies. A larger total liner width does not necessarily mean a larger accessible margin on the required side. Likewise, approval of one package orientation should not silently become approval of its mirrored arrangement.
Request a quotation against the marked drawing
Send the end view, plan view, roll orientation and package context through Haoxuan’s contact page. Include the intended application, requested roll dimensions, quantity and destination. Ask the supplier to identify feasible geometry, the offered construction, sample availability and any dimensions still requiring agreement.
The useful result is a shared drawing that identifies both the adhesive strip and the removable margin. With that reference in place, purchasing can compare the quoted format with the sample and the receiving team can check the same feature the package user will eventually handle.