PTFE Coated Glass Cloth Tape

Product Description

J-710 is manufactured from woven fiberglass fabric impregnated with PTFE dispersion and processed to form a durable, low-friction surface. One side is coated with a silicone pressure-sensitive adhesive for bonding to metal and other suitable equipment surfaces.

The PTFE surface serves as a release layer between the machine and the material being processed. On heat-sealing equipment, it helps reduce the accumulation of molten packaging film and adhesive on the sealing bar. On guide rails, chutes and rollers, it provides a smoother surface that can reduce sticking and material buildup.

Compared with unsupported PTFE film tape, the glass cloth reinforcement provides greater tensile strength, dimensional stability, puncture resistance and resistance to mechanical wear. However, the woven structure may leave a more noticeable surface texture than PTFE film tape. The correct construction should therefore be selected according to the equipment surface, sealing quality and expected wear.

 

Technical Data

The following values are typical product data and should not be treated as guaranteed limits without an agreed product specification.

Property	J-710-13	J-710-18	J-710-25	J-710-30
Total thickness	0.13 mm	0.18 mm	0.25 mm	0.30 mm
Backing thickness*	0.08 mm	0.13 mm	0.18 mm	0.25 mm
Backing material	PTFE glass cloth	PTFE glass cloth	PTFE glass cloth	PTFE glass cloth
Adhesive	Silicone	Silicone	Silicone	Silicone
Adhesion to steel	21 N/100 mm	22 N/100 mm	24 N/100 mm	24 N/100 mm
Tensile strength	900 N/100 mm	1700 N/100 mm	2300 N/100 mm	2750 N/100 mm
Temperature range	-70°C to 260°C	-70°C to 260°C	-70°C to 260°C	-70°C to 260°C

*Backing thickness refers to the PTFE-coated glass cloth construction before the adhesive layer is included.

Adhesion and tensile results can vary with the test method, sample conditioning and test direction. Please request the current TDS or an agreed specification if these values will be used for incoming inspection or engineering approval.

 

Key Features

PTFE Release Surface

The exposed PTFE surface helps reduce the adhesion of molten packaging film, hot-melt adhesive, resin and other process materials. This makes the tape suitable for machinery surfaces where buildup can interfere with production or cleaning.

Glass Cloth Reinforcement

The woven fiberglass backing improves dimensional stability and resistance to tearing, puncture and abrasion. This is particularly useful on sealing bars and machine parts that experience repeated heating or mechanical contact.

Silicone Pressure-Sensitive Adhesive

The silicone adhesive supports bonding under elevated-temperature process conditions. Adhesion and removal performance are influenced by the substrate, surface preparation, temperature and time in service, so application testing is recommended where residue or clean removal is critical.

Low Moisture Absorption

The PTFE surface has low moisture absorption and is relatively easy to wipe clean. The complete tape construction should not, however, be treated as a permanent waterproof seal, especially at edges and overlaps.

Resistance to Many Industrial Chemicals

The exposed PTFE surface resists many commonly encountered chemicals and solvents. Prolonged chemical exposure should still be evaluated because the adhesive and exposed tape edges may respond differently from the PTFE surface.

Multiple Thicknesses

Four thicknesses allow the tape to be selected according to the required balance between conformability, heat transfer, mechanical protection and wear life.

 

Typical Applications

Heat-Sealing Bars and Jaws

J-710 can be applied over sealing bars or jaws to provide a non-stick surface between the heated equipment and packaging film. It is suitable for evaluation on:

· Impulse sealers

· L-bar sealers

· Form-fill-seal packaging machines

· Vacuum packaging machines

· Band sealers

· Blister packaging equipment

· Thermoplastic film-sealing equipment

Tape thickness can affect heat transfer, sealing pressure and the surface appearance of the finished seal. Buyers replacing an existing tape should therefore confirm the original thickness before changing grades.

Packaging-Machine Release Surfaces

The tape can cover equipment areas where film, adhesive or other material tends to accumulate, including:

· Guide rails

· Chutes and slides

· Rollers and drums

· Turnbars and formers

· Selected conveyor surfaces

· Pressing and processing equipment

For rotating parts or high-load conveyor applications, the surface speed, diameter, mechanical load and tape joint should be evaluated before bulk use.

Composite Molding and Bonding Tools

The PTFE surface can serve as a release layer on selected composite molding and bonding tools. Suitability depends on the resin system, curing temperature, pressure and required surface finish.

Applications involving aerospace parts or other controlled industries require separate qualification against the buyer’s material, traceability and process requirements. J-710 should not be described as aerospace-certified unless the applicable documentation is available.

Other Industrial Release Applications

J-710 may also be considered for machine surfaces exposed to intermittent sticking, abrasion or material buildup. A sample trial is recommended when the application differs from conventional heat sealing or packaging machinery.

 

How to Select the Tape Thickness

A thicker tape is not automatically better. The choice affects durability, flexibility, heat transfer and the step created at the tape edge.

Total thickness	General selection guidance
0.13 mm	Suitable for relatively smooth surfaces where a thin construction and smaller edge step are preferred
0.18 mm	A balanced option for many general heat-sealing and packaging-machine applications
0.25 mm	Provides greater mechanical strength for applications with higher wear or puncture risk
0.30 mm	Intended for heavier mechanical protection where tape thickness will not interfere with heat transfer or equipment clearance

These recommendations are starting points rather than fixed rules. The sealing temperature, film type, bar design, surface radius and production speed should also be considered.

When replacing an existing tape, first match its construction and total thickness. Changing thickness without testing may alter sealing temperature, dwell time or pressure requirements.

 

PTFE Glass Cloth Tape or PTFE Film Tape?

Both products provide a PTFE release surface, but they are not interchangeable in every application. Glass cloth reinforcement improves mechanical strength and dimensional stability, while unsupported PTFE film normally provides a smoother and more conformable surface.

The following table covers the main differences relevant to J-710. Buyers comparing other backing materials, adhesive systems or high-temperature tapes can find additional guidance in our PTFE tape material comparisons.

Selection factor	PTFE Glass Cloth Tape	PTFE Film Tape
Reinforcement	Woven fiberglass	Unsupported PTFE film
Tensile strength	Generally higher	Generally lower
Puncture and abrasion resistance	Better for demanding mechanical contact	More suitable where heavy reinforcement is unnecessary
Dimensional stability	Higher	Depends on film thickness
Surface texture	Woven texture may remain visible	Generally smoother
Conformability around small radii	More limited	Generally better
Typical use	Heat-sealing bars, guide rails and higher-wear release surfaces	Smooth sealing surfaces and curved or detailed machine parts

Where the appearance of the seal is critical, the tape should be tested to ensure the glass weave does not leave an unacceptable impression on the packaging film.

Installation and Replacement

Correct installation has a direct effect on adhesion, tape life and sealing consistency.

1. Switch off the machine and allow the sealing area to reach a safe handling temperature.

2. Remove the old tape and clean away adhesive, plastic and other contamination.

3. Make sure the application surface is clean, dry and free from dust or oil.

4. Remove the yellow PVC release liner completely before applying the tape. The liner is intended only for handling and converting and is not part of the working tape construction.

5. Position the tape without excessive stretching.

6. Apply firm, even pressure across the entire bonded area.

7. Avoid wrinkles, trapped air and unnecessary overlaps in the active sealing area.

8. Run an initial low-speed trial and inspect the seal before returning the machine to full production.

If the tape repeatedly lifts, wrinkles or leaves adhesive transfer, check the operating temperature, surface preparation, sealing-bar condition and replacement interval before changing thickness.

 

Common Problems to Check

Tape failure is not always caused by insufficient temperature resistance. Surface contamination, excessive dwell time, incorrect thickness, mechanical contact and poor installation can produce similar symptoms. The checks below cover the problems most often seen with PTFE glass cloth tape. For a more systematic troubleshooting process, refer to our PTFE tape failure analysis.

Packaging Film Begins to Stick

Inspect the PTFE surface for wear, contamination or exposed glass fabric. Once the release layer has worn through, molten film or adhesive can begin to accumulate on the tape.

Tape Edges Lift from the Bar

Check the sealing-bar surface, installation pressure and bending radius. Edge lifting may also occur when the tape is repeatedly exposed to operating conditions beyond the practical limit of the adhesive.

Adhesive Remains After Removal

Adhesive transfer is affected by temperature, service time, substrate condition and removal method. If clean removal is important, include a heat-aging and removal test in the sample evaluation rather than relying only on the initial peel value.

The Seal Becomes Uneven

Check for wrinkles, overlaps, trapped contamination and inconsistent tape thickness. Changing to a thicker grade may also alter heat transfer and sealing pressure.

The Tape Wears Out Too Quickly

Identify the actual contact and abrasion points before increasing thickness. A heavier grade may improve mechanical life, but its effect on heat transfer, surface texture and equipment clearance still needs to be tested.

Available Formats and Custom Converting

J-710 can be supplied in different formats for industrial users, distributors and converting companies:

· Custom-width slit rolls

· Log rolls for local converting

· Linered rolls for cutting and die-cutting

· Self-wound rolls for direct application

· Custom roll lengths subject to production confirmation

· Private labels and export packaging subject to order requirements

Please specify the required width, roll length, total thickness, liner configuration and annual quantity when requesting a quotation. Width and thickness tolerances should be confirmed in the agreed specification before production.

 

Documents and Compliance

Available technical or compliance documents depend on the exact product construction and order requirements. Please contact us to confirm the availability of:

· Technical Data Sheet

· Safety Data Sheet, where applicable

· RoHS declaration

· REACH declaration

· Certificate of Analysis or batch inspection report

· Material or food-contact documentation, where specifically required

PTFE material alone does not establish that the complete adhesive tape is approved for direct food contact, medical packaging, electrical insulation or aerospace use. These applications must be reviewed against the exact tape construction and the buyer’s regulatory requirements.

 

Information to Include in Your Inquiry

Temperature and thickness alone are not enough to identify the right tape. Machine design, sealing cycle, surface geometry and the material being processed can all affect tape performance. Buyers preparing a new project or comparing several constructions can use our PTFE tape buying guides to review the main specification and sample-testing steps before issuing an RFQ.

To recommend the most suitable J-710 thickness and format, please provide:

· Machine type and model

· Application position

· Sealing-bar or equipment dimensions

· Current tape construction and thickness

· Operating temperature

· Heating time or dwell time