PTFE Zone Tape / Edge Adhesive PTFE Tape / Adhesive-Free Center Heat Sealer Tape

Product Specification

1. Product Overview

Nomay PTFE Zone Tape, also called edge adhesive PTFE tape or adhesive-free center heat sealer tape, combines PTFE-coated woven fiberglass cloth with silicone adhesive applied to selected edge areas. The center remains free of adhesive, while the exposed PTFE working surface provides non-stick release.

This construction is intended for compatible impulse heat sealers, bag-making equipment and packaging machines where the heating ribbon or sealing wire requires a cover without adhesive directly beneath the active heating path. Adhesive edge strips attach the cover to suitable mounting areas beside the heater.

Selection depends on the machine geometry, heating-element width, mounting surface, temperature, exposure time and sealing cycle. Zone tape is a selectively adhesive-coated product, not a completely non-adhesive film or a double-sided adhesive tape.

2. Product Construction

The construction consists of:
- Working surface: PTFE coating for non-stick release and low friction.
- Reinforcement: Woven fiberglass cloth.
- Adhesive: Silicone adhesive positioned along specified edges on the mounting face.
- Center zone: PTFE-coated fiberglass without pressure-sensitive adhesive on the mounting face.
- Release liner: Liner requirement, material and coverage are confirmed for the selected supply format.

For a two-edge layout, the left adhesive strip and right adhesive strip are on the same face of the tape. They secure the material beside the heating path, while the adhesive-free center spans the heating element.

Alternative single-edge or multi-zone layouts require drawing review and confirmation. The drawing must identify the adhesive face and winding direction to prevent installation errors.

3. Backing & Adhesive System

Backing material: PTFE-coated woven fiberglass cloth.

The fiberglass reinforcement supports the cover during installation and repeated sealing cycles. The PTFE working surface helps packaging film release after sealing and reduces sliding friction at the contact surface. Actual wear life depends on pressure, temperature, film material, surface condition and operating frequency.

Adhesive system: Silicone adhesive.

The silicone adhesive is restricted to the specified mounting zones. Its suitability depends on the edge-zone temperature, mounting substrate, available bonding width and exposure conditions. The adhesive-free center avoids placing an adhesive layer directly beneath the active heating path.

Adhesive chemistry and adhesive placement must both be specified. An unspecified transfer adhesive is not an interchangeable substitute for the confirmed silicone adhesive system.

4. Available Specifications

Nomay provides the following enterprise specification ranges for its PTFE and silicone adhesive product family. The achievable combination for a finished zone-tape layout must be confirmed against the drawing.

- Thickness: 0.1–0.35 mm. Confirm whether the selected value refers to the backing or the adhesive-coated section. Center-zone and edge-zone thicknesses must be identified separately where relevant.
- Width: 0.1–1250 mm at product-family level. A finished two-edge zone tape must be wide enough to accommodate both adhesive strips and the required adhesive-free center.
- Roll length: 10–500 m, subject to the selected thickness, layout and supply format.
- Color: Brown.
- Adhesive: Silicone adhesive.
- Master roll length: 500 m; finished roll availability is confirmed separately.
- Left and right adhesive widths: Defined by the approved drawing.
- Adhesive-free center width: Defined by the heating-element width and required clearance.

For a simple two-edge layout:
Overall width = left adhesive width + adhesive-free center width + right adhesive width.

Please specify dimensional tolerances, adhesive face, winding direction and any release-liner requirement. Product-family limits do not mean that every dimension combination is available as a finished zone tape.

5. Key Features & Buyer Benefits

- Adhesive-free heating center: Keeps adhesive out of the central heating path, helping reduce adhesive-related contamination at that location.
- Silicone adhesive edge strips: Provide attachment beside the heater where the machine has suitable mounting surfaces.
- Non-stick PTFE working surface: Helps the sealed film release from the cover during the sealing cycle.
- Low-friction surface: Supports movement of compatible packaging film across the contact area.
- Fiberglass reinforcement: Helps the cover maintain its shape during handling and installation.
- Drawing-based zone dimensions: Match the adhesive and free-center areas to the customer's machine rather than relying on an unsuitable standard layout.
- Defined roll orientation: Helps maintenance teams install the adhesive face and winding direction correctly.

These benefits depend on correct installation and validated operating conditions. They do not represent a guarantee of residue-free removal, a fixed service life or compatibility with every packaging film.

6. Application Procedure

Before installation, switch off and isolate the equipment, allow it to cool and follow the machine manufacturer's maintenance instructions. Remove the previous cover and prepare the mounting areas using a cleaning method compatible with the equipment.

Check that the mounting surfaces are clean, dry, sound and free from oil, dust and loose residue. Confirm that the overall width, adhesive-strip widths and center opening match the heating assembly.

Position the adhesive-free center over the heating ribbon or sealing wire. Keep the adhesive strips outside the active heating path, with the clearance required by the machine design. Attach the edge strips to the intended mounting surfaces with even pressure.

Install the cover without wrinkles, trapped debris or excessive tension. Remove the release liner before bonding if the supplied version includes one. Confirm installation temperature and any conditioning time for the selected adhesive.

Run a trial using the actual packaging film. Adjust sealing temperature, dwell time, pressure and cooling time within the equipment's approved settings, then inspect film release, seal quality and edge attachment.

Replace the cover if it becomes torn, worn through, displaced or contaminated in a way that affects operation. Store unused rolls in clean, dry conditions, protected from sunlight, heat and contamination; confirm shelf life and storage limits for the supplied model.

7. Application Industries

Relevant industries include:
- Packaging machinery manufacturing.
- Flexible packaging and plastic bag production.
- Packaging-film converting.
- Heat-sealer maintenance and replacement-parts supply.

Selection is based on the sealing assembly and operating conditions rather than the industry name alone. Food-contact, medical-packaging or other regulated uses require separate confirmation of the selected construction and applicable documentation.

8. Application Scenarios / Problems Solved

Adhesive beneath the heating ribbon:
Where the machine design requires an adhesive-free heating path, a fully coated tape may place adhesive in an unwanted location. The zone construction positions silicone adhesive beside that path and leaves the center free of adhesive.

Movement of an unsecured cover:
A non-adhesive strip may require mechanical attachment. On equipment with suitable side mounting areas, adhesive edge strips provide another attachment arrangement while preserving the free center.

Mismatch between tape and heater widths:
An incorrectly sized center can place adhesive too close to the active heater or leave insufficient mounting width. A dimensioned zone layout allows the center and both adhesive strips to be reviewed together.

Packaging film sticking to the contact surface:
The exposed PTFE surface helps release compatible film after sealing. Performance must be checked using the actual film, pressure, dwell time and cooling cycle.

Replacement-part installation errors:
A drawing that identifies the adhesive face, left and right zones, roll length and winding direction helps the maintenance team specify and install the correct replacement.

9. Performance & Operating Conditions

Temperature:
Nomay's enterprise temperature range for the PTFE and silicone adhesive product family is 260–300°C. This range is not a continuous-use rating for every zone-tape construction. The permitted continuous temperature, short-term peak temperature and exposure duration must be confirmed for the selected thickness, adhesive zones and application.

The heater setting, tape contact temperature and adhesive-edge temperature may differ. Evaluate the complete sealing cycle, including dwell time, pressure, cooling time and operating frequency. Do not assume that 260°C represents continuous operation or that 300°C is suitable for unrestricted exposure.

Peel strength:
Nomay's enterprise product-family range is 0–1200 g, as supplied. This is not a model-specific acceptance value. Confirm the applicable result, specimen width, test angle, speed, substrate and conditioning before using it for comparison or specification. Peel performance applies to the adhesive zones, not the adhesive-free center.

Mechanical and release performance:
Cover life and film release depend on backing thickness, heater geometry, pressure, abrasion, film type and cleaning practice. Validate the selected construction under representative production conditions.

Chemical exposure:
Confirm compatibility with the actual cleaning agents or process chemicals, including concentration, temperature and contact time. PTFE surface properties alone do not establish compatibility of the complete adhesive-backed construction.

10. Comparison & Selection Guide

PTFE zone tape versus fully adhesive-coated PTFE tape:
Choose zone tape when the equipment requires an adhesive-free center with attachment beside the heating path. Consider a fully coated version when continuous bonding is required and is permitted by the machine design.

PTFE zone tape versus non-adhesive PTFE fabric:
Choose zone tape when suitable side areas are available for adhesive attachment. Consider non-adhesive fabric where the machine uses clamps or another mechanical retention system.

Two-edge layout versus alternative layouts:
A two-edge layout provides mounting strips on both sides of one free center. Single-edge or multi-zone arrangements require review of the machine drawing and confirmation of the proposed construction.

Thickness selection:
Assess heat response, flexibility, wear exposure and installation clearance together. A thicker cover may change the sealing cycle; a thinner cover may require more frequent inspection under abrasive conditions. Confirm the thickness measurement location before comparing alternatives.

Zone-width selection:
Specify the heating-element width and required clearance first, then check that sufficient mounting width remains on both sides. Do not select overall width without defining the adhesive-free center and adhesive strips.

11. Technical Notes + FAQ

Technical notes:
All zone dimensions, tolerances, thickness measurement locations, adhesive face and winding direction should be recorded in the approved drawing. Product-family ranges are selection references; the confirmed model specification governs the supplied product.

Q: Does "two adhesive edges" mean double-sided tape?
A: No. In the two-edge construction described here, both adhesive strips are on the same mounting face. The opposite face is the PTFE working surface.

Q: Is the center completely free of adhesive?
A: The specified center zone has no pressure-sensitive adhesive on the mounting face. The PTFE-coated fiberglass backing remains present across that zone.

Q: How do I specify the center width?
A: Provide the heating ribbon or wire width, machine geometry and required clearance. The center must keep the adhesive outside the active heating path while preserving sufficient side mounting area.

Q: Can the left and right adhesive strips have different widths?
A: Submit the required dimensions for drawing review. Availability and tolerances are confirmed before quotation and production.

Q: Can the tape run continuously at 300°C?
A: Continuous operation at 300°C is not established by the enterprise temperature range. Provide the actual tape temperature, adhesive-edge temperature, exposure time and cycle conditions for model confirmation.

Q: Does the 0–1200 g peel range apply to the center?
A: No. The center is adhesive-free. Any specified peel value applies to the adhesive-coated zone under an identified test method.

Q: Is a release liner included?
A: Confirm the liner requirement and coverage when ordering. Do not assume that every supply format has the same liner arrangement.

Q: Is this automatically suitable for direct food contact?
A: No. Direct food-contact suitability must be confirmed for the selected construction and intended contact conditions, supported by applicable documentation.

12. Inquiry CTA

Contact Nomay with your application, machine model, mounting substrate, operating temperature, exposure time, thickness, overall width, roll length, quantity and destination country.

For zone tape, also provide a dimensioned drawing showing the heating-element width, left and right adhesive widths, adhesive-free center width, tolerances, adhesive face and winding direction. Include the packaging-film material, sealing pressure, cycle conditions and release-liner requirement where applicable.

Nomay will review the information to confirm the suitable model, specifications, minimum order quantity and price, and determine the appropriate sample for application evaluation.