Brown PTFE Tape with Release Liner (Liner-Backed PTFE Tape / Die-Cut PTFE Glass Cloth Tape / Heat Sealer Tape with Liner) – For Die Cutting, Heat Sealers & Equipment Lining

1. Product Overview

Brown PTFE Tape with Release Liner, also known as Liner-Backed Brown PTFE Tape, Die-Cut PTFE Glass Cloth Tape or Heat Sealer Tape with Liner, is a high-temperature industrial tape consisting of PTFE-coated woven fiberglass cloth, high-temperature silicone pressure-sensitive adhesive and a removable protective liner.

The brown PTFE working surface provides non-stick release and low friction. The woven fiberglass reinforcement provides tensile strength, dimensional stability and wear resistance. The release liner protects the silicone adhesive during storage, transportation, slitting and die cutting.

Compared with linerless self-wound brown PTFE tape, this liner-backed construction is better suited to automatic die cutting, kiss cutting, sheet conversion, waste removal, precision positioning and production of application-specific equipment pads.

The release liner must be removed before the tape is installed. It is a processing and handling component and is not part of the high-temperature working construction.

2. Product Construction

The standard construction consists of:

• Working Surface: Brown PTFE non-stick surface

• Reinforcing Backing: High-density woven fiberglass cloth

• Surface Treatment: PTFE impregnation, coating and sintering

• Adhesive: High-temperature silicone pressure-sensitive adhesive

• Adhesive Side: Single-sided

• Protective Liner: Yellow release paper as the standard option

• Optional Liner Types: White, blue or clear release material, depending on converting requirements

• Standard Tape Thicknesses: 0.13 mm, 0.18 mm and 0.25 mm, excluding the release liner

• Finished Formats: Liner-backed rolls, sheets, strips, pads and custom die-cut shapes

The release liner stabilizes the adhesive-backed material during converting and prevents the adhesive surface from sticking to tools, rollers, worktables or adjacent tape layers before installation.

3. Backing & Adhesive System

PTFE-Coated Fiberglass Backing

The backing uses woven fiberglass cloth impregnated and coated with PTFE dispersion. After sintering, the PTFE forms a brown, low-friction and non-stick working surface around the reinforced fabric structure.

The fiberglass layer improves resistance to pulling, tearing, puncturing, dimensional movement and repeated mechanical wear. This makes the product more suitable for heat sealers, industrial guide rails and machinery surfaces than unsupported PTFE film when reinforcement is required.

High-Temperature Silicone Adhesive

The reverse side is coated with silicone pressure-sensitive adhesive designed for high-temperature industrial bonding. The adhesive bonds through application pressure and does not require separate heat or moisture activation.

The complete tape construction is designed for continuous temperatures up to 260°C under suitable operating conditions. Actual adhesion and service life depend on substrate condition, thermal cycling, mechanical pressure, tape thickness, application method and replacement frequency.

Release Liner

The release liner protects the silicone adhesive and provides dimensional support during slitting, cutting, printing, lamination and die cutting.

The standard liner is yellow release paper. Other liner colors or film liners may be selected according to die-cutting speed, release force, dimensional stability and clean-processing requirements.

The liner must be peeled away before application. It must not remain between the adhesive and the equipment surface or enter the high-temperature operating zone.

4. Key Features & Buyer Benefits

• Protective Release Liner: Keeps the silicone adhesive covered before use and helps reduce contamination during handling and storage.

• Stable Die Cutting: The liner supports the tape during rotary die cutting, flatbed die cutting, kiss cutting and precision converting.

• Easier Waste Removal: Improves the stability of surrounding waste material during die-cut production.

• Accurate Positioning: Allows operators to handle and align cut pieces without directly touching the adhesive.

• Non-Stick PTFE Surface: Helps reduce the buildup of molten film, adhesives, coatings and process residues.

• Low-Friction Working Layer: Supports smoother movement of films, fabrics, paper and components across equipment surfaces.

• Fiberglass Reinforcement: Provides tensile strength, dimensional stability, tear resistance and resistance to repeated wear.

• High-Temperature Silicone Adhesive: Supports continuous high-temperature industrial processes within the specified conditions.

• Multiple Finished Formats: Can be supplied as rolls, sheets, strips, pads, discs, rectangles or drawing-based shapes.

• Replaceable Equipment Protection: Creates a replaceable non-stick layer on sealing bars, heating plates, guides and fixtures.

• Cleaner Storage and Transportation: The protected adhesive is less exposed to dust, accidental contact and blocking before use.

• Production Consistency: Pre-cut pieces help operators install the same dimensions and position during repeated maintenance cycles.

5. Applications

Die-Cut Heat-Sealer Pads

Converted into pre-cut pads for sealing bars, heating plates, sealing jaws and other heat-sealing components requiring repeatable replacement.

Packaging Machinery

Used on impulse sealers, vacuum packaging machines, bag-making machines, blister-forming equipment and form-fill-seal machinery.

FPC and Electronic Hot-Press Fixtures

Applied as pre-cut anti-stick pads on selected FPC hot-press heads, heated fixtures and electronic manufacturing tools operating within the approved conditions.

Guide Rails, Chutes and Slides

Converted into fixed-size strips or patches for industrial guide rails, chutes and sliding surfaces requiring low friction and wear protection.

Roller and Equipment Patches

Die cut into dimensioned pieces for rollers, curved components, machinery covers and surfaces where standard roll application is inconvenient.

Hot-Press Plates and Molds

Used as a replaceable non-stick separation layer on selected hot-press plates, forming fixtures and mold surfaces.

Composite Tooling

Cut into custom shapes for release surfaces, fixtures and positioning points in composite-processing equipment.

Industrial Maintenance Kits

Supplied as pre-cut replacement pieces for scheduled maintenance, helping operators replace worn tape with consistent dimensions.

6. Industries

• Flexible packaging manufacturing

• Heat-sealing equipment production

• Plastic bag and film converting

• Electronics and FPC manufacturing

• Printing and paper converting

• Textile pressing and lamination

• Plastics extrusion and forming

• Composite materials manufacturing

• Automotive component production

• Industrial equipment manufacturing

• Machinery maintenance

• Precision die-cutting and tape converting

Use on food or medical packaging machinery describes the equipment application. Direct food-contact or medical suitability requires documentation for the exact finished tape, adhesive and liner construction.

7. Application Scenarios / Problems Solved

Process: Precision Die Cutting

Problem: Linerless PTFE tape stretches, sticks to tooling or becomes difficult to feed and remove during die cutting.

Tape Function: The release liner supports the tape and protects the adhesive during cutting and waste removal.

Expected Result: More stable feeding, cleaner cut edges and easier production of repeatable parts.

Confirm Before Selection: Die-cutting method, liner release force, part dimensions, tolerance, waste-removal design and roll width.

Process: Replacing Tape on Heat-Sealing Jaws

Problem: Operators manually cut roll tape into inconsistent shapes, increasing installation time and alignment errors.

Tape Function: Pre-cut liner-backed pads can be peeled and positioned directly on the sealing component.

Expected Result: Faster replacement and more consistent coverage of the working surface.

Confirm Before Selection: Sealing-jaw drawing, operating temperature, peak duration, pressure, pad thickness and replacement interval.

Process: Protecting FPC Hot-Press Fixtures

Problem: Processed materials adhere to heated fixtures, while the protected area requires a precise tape shape.

Tape Function: A custom die-cut PTFE glass cloth pad provides a high-temperature non-stick surface in the required position.

Expected Result: Reduced buildup and more repeatable fixture coverage.

Confirm Before Selection: Fixture drawing, temperature profile, pressure, electrical requirements and surface-finish requirements.

Process: Guide-Rail Maintenance

Problem: Technicians cut strips manually, creating uneven edges and variable installation positions.

Tape Function: Liner-backed strips can be supplied at controlled dimensions for more accurate placement.

Expected Result: Consistent maintenance and reduced preparation time.

Confirm Before Selection: Rail width, strip length, surface condition, load, line speed and edge exposure.

Process: Long-Term Storage of Converted Parts

Problem: Exposed adhesive collects dust, sticks to packaging or loses handling quality before installation.

Tape Function: The release liner covers the adhesive until the part is ready to use.

Expected Result: Cleaner handling and better organization of replacement parts.

Confirm Before Selection: Storage temperature, humidity, packaging method, storage period and liner type.

8. Technical Specifications

• Product Type: Brown PTFE Tape with Release Liner

• Backing Material: PTFE-coated woven fiberglass cloth

• Adhesive: High-temperature silicone pressure-sensitive adhesive

• Adhesive Side: Single-sided

• Standard Protective Liner: Yellow release paper

• Optional Liner Types: White paper, blue release material or clear release film

• Tape Color: Industrial brown

• Standard Tape Thicknesses: 0.13 mm, 0.18 mm and 0.25 mm, excluding the liner

• Continuous Operating Temperature: -70°C to 260°C after liner removal

• Short-Term Peak Temperature: Up to 300°C under validated short-duration conditions after liner removal

• Standard Widths: 13 mm, 19 mm, 25 mm and 50 mm

• Master-Roll Width: Up to 1000 mm

• Standard Roll Lengths: 10 m, 20 m, 30 m and 50 m

• Available Formats: Rolls, sheets, strips, discs, rectangular pads and custom die-cut parts

• Available Processing: Slitting, sheeting, kiss cutting, die cutting and fixed-length conversion

Tape thickness refers to the PTFE fiberglass backing plus adhesive and excludes the release liner. When inspecting incoming material, the purchase specification must clearly state whether the measured thickness includes or excludes the liner.

Final dimensions and performance values must follow the Nomay quotation, approved drawing, sample and product-specific technical data.

9. Performance & Operating Conditions

Temperature Performance

After the liner is removed, the tape construction is designed for continuous use from approximately -70°C to 260°C under suitable conditions.

The stated 300°C peak applies only to validated short-duration exposure. It must not be treated as the continuous operating temperature.

The release liner is only used for storage, converting and application. It must be removed before the tape enters the high-temperature process.

Surface Preparation

The equipment surface must be clean, dry and free from oil, dust, moisture, rust and release agents. Contaminated surfaces can reduce initial adhesion and cause edge lifting during heating.

Apply the tape with firm, uniform pressure. Avoid stretching the tape during placement because stored tension may cause shrinkage, lifting or displacement after thermal cycling.

Liner Removal and Placement

Partially peel the liner to expose a small adhesive area, position the part, then gradually remove the remaining liner while applying uniform pressure. This method helps reduce air bubbles, wrinkles and positioning errors.

Avoid touching the exposed adhesive with fingers or contaminated tools.

Die-Cutting Performance

The liner improves material stability during cutting, but die-cut quality also depends on blade condition, cutting pressure, roll tension, liner strength, part geometry and adhesive flow.

Small holes, narrow strips, sharp internal corners and complex shapes require individual converting evaluation.

Non-Stick and Wear Performance

The PTFE surface helps reduce sticking and friction. Fiberglass reinforcement improves resistance to tearing, puncturing and repeated wear.

Actual service life depends on temperature, pressure, abrasion, equipment speed, surface smoothness and contact material.

Chemical and Moisture Exposure

PTFE resists many industrial chemicals and absorbs little moisture. However, chemicals entering from cut edges may reach the silicone adhesive.

The complete die-cut part should be tested if it will be exposed to strong solvents, prolonged chemical contact or immersion.

Removal and Residue

Removal performance depends on the operating temperature, bonding period, substrate, adhesive aging and thermal cycling. Clean removal must be validated under the customer’s actual process conditions.

10. Comparison & Selection Guide

Liner-Backed Brown PTFE Tape vs Linerless Brown PTFE Tape

Choose Liner-Backed Brown PTFE Tape when:

• The tape will be die cut, kiss cut or converted into sheets.

• The adhesive must remain protected before installation.

• Accurate positioning is required.

• Custom pads, strips, discs or complex shapes are needed.

• Replacement parts will be stored or supplied as maintenance kits.

Choose Linerless Brown PTFE Tape when:

• Standard slit rolls will be applied directly.

• Die cutting and precision positioning are not required.

• Faster manual application from a roll is preferred.

• The customer wants to avoid disposing of a release liner.

PTFE Fiberglass vs Pure PTFE Film

Choose the fiberglass-reinforced construction for tensile strength, dimensional stability, wear resistance and repeated machine operation.

Choose pure PTFE film when a smoother, weave-free and more conformable surface is more important than reinforcement.

Liner Selection

• Yellow Release Paper: Standard general-purpose option for storage and die cutting.

• White Release Paper: Useful where a clean visual background or printing is required.

• Blue Release Material: Provides easy visual identification during assembly.

• Clear Release Film: Suitable for selected precision-positioning and clean-converting requirements.

Liner availability, thickness and release force depend on the selected construction and converting method.

11. Technical Notes + FAQ

What is Brown PTFE Tape with Release Liner?

It is PTFE-coated fiberglass tape with high-temperature silicone adhesive protected by a removable liner. It is designed for converting, die cutting and precise installation.

Is the brown color on the tape or the release liner?

Brown describes the PTFE tape body. The release liner is a separate removable material and may be yellow, white, blue or clear.

Must the release liner be removed?

Yes. The liner must be removed before bonding the tape to the equipment. It is not part of the high-temperature working structure.

Can the release paper withstand 260°C?

The 260°C rating applies to the tape after liner removal. The release paper must not remain in the high-temperature operating area.

Does the stated thickness include the liner?

No. The standard 0.13 mm, 0.18 mm and 0.25 mm values refer to the tape backing and adhesive, excluding the release liner.

Why is a liner useful for die cutting?

The liner supports the tape, protects the adhesive and allows kiss cutting, waste removal, sheet conversion and accurate positioning.

Can it be supplied as custom shapes?

Yes. It can be converted into strips, discs, rectangles, pads and drawing-based shapes according to the equipment dimensions and tolerance requirements.

Can it operate continuously at 260°C?

The tape construction is designed for continuous use up to 260°C under suitable conditions after the liner is removed. Actual service life depends on temperature, pressure, thermal cycling and mechanical wear.

Is 300°C a continuous operating temperature?

No. It is only a short-duration peak value requiring validation for the selected construction and process.

Will it remove without adhesive residue?

Residue behavior depends on temperature, bonding period, substrate and adhesive aging. Applications requiring clean removal must be tested under actual operating conditions.

Can it be used on food-packaging machinery?

It can be used on suitable heat-sealing and packaging equipment. Direct food-contact use requires documentation for the exact finished tape construction.

12. Inquiry CTA

Send Your Application and Die-Cutting Requirements

For an accurate product recommendation and quotation, please provide:

• Application and industry

• Equipment or part drawing

• Continuous operating temperature

• Short-term peak temperature and duration

• Bonding surface

• Required tape thickness, excluding the liner

• Required liner type or color

• Required width and roll length

• Finished part dimensions and tolerances

• Roll, sheet, strip or die-cut format

• Die-cutting or waste-removal requirements

• Required quantity

• Packaging and labeling requirements

• Clean-removal, chemical-resistance or other special requirements

Nomay will recommend the appropriate tape thickness, release liner, dimensions and converted format according to the submitted operating and processing conditions.