PTFE high-temperature cloth tape

PTFE high-temperature cloth tape is made of Fiberglass cloth Made by impregnating a base substrate with polytetrafluoroethylene (PTFE) emulsion and sintering it at high temperature, this PTFE‑coated fabric is then laminated on one side with a high‑performance silicone pressure‑sensitive adhesive and covered with a release liner, resulting in a high‑temperature, corrosion‑resistant tape. Combining the high strength of glass fiber cloth with PTFE’s outstanding properties, it features a smooth, non‑stick surface and an integrated pressure‑sensitive adhesive for direct application. Available in common colors—tan (coffee), black, and white—and offered in multiple grades—including standard adhesive, extra‑strong adhesive, flame‑retardant, and thin or thick variants—it serves as a versatile industrial‑grade, high‑temperature, non‑stick sealing material.

Core Performance Features

High and low temperature resistance: Long-term service temperature range is –70°C to 260°C; it can withstand brief exposure to instantaneous temperatures as high as 300°C, with stable performance under alternating hot–cold conditions.

Non-stick release: PTFE has an extremely low coefficient of friction, making it difficult for most resins, adhesives, and molten materials to adhere, thus facilitating easy cleaning.

Chemical resistance: Resistant to strong acids, strong alkalis, various organic solvents, and oils; not easily swollen or degraded by chemicals.

Insulation and Flame Retardancy: Excellent electrical insulation properties, with self‑extinguishing characteristics and low flammability.

Dimensional stability, tensile strength, and abrasion resistance: The fiberglass substrate is resistant to stretching and deformation, exhibits excellent tear resistance and wear resistance, and is less prone to damage.

Smooth surface, easy to clean: Stains and burnt-on residue can be wiped away.

Pressure-sensitive adhesion: Bonds firmly at room temperature and is easy to handle during processing; resists debonding under high-temperature conditions (use a high-temperature‑resistant silicone adhesive).

Main application areas

Packaging industry: heat sealing machines, sealing machines with heat‑insulating and anti‑stick coatings, bag‑making machine hot knives with protective coverings, and anti‑stick liners for hot‑press molds.

Rubber and plastic processing: hot‑pressing templates, vulcanization backing plates, and release liners to prevent plastics and rubbers from sticking to molds.

Electronics Industry: SMT reflow soldering thermal shielding, PCB hot pressing, electrical insulation and isolation, high-temperature masking and protection.

Food Processing: Food thermal‑press equipment, conveyor‑belt seam sealing, and non‑stick coating for baking molds (food‑grade specifications)

Composite materials: carbon fiber, fiberglass thermoplastic forming release liners, and vacuum infusion auxiliary isolation layers.

General Industry: Drum coating, conveyor belt repair, pipeline insulation and corrosion protection, welding heat‑shielding and masking, and anti‑sticking for hot‑stamping machines.

Printed heat transfer: Heat-transfer platen and thermal pressure roller surface coating

Advantages compared to other materials

Comparison with pure PTFE film tape

Pure PTFE film, without fiberglass reinforcement, is easy to stretch and tear; PTFE high‑temperature tape boasts high tensile strength and resists elongation and deformation, making it well suited for applications involving repeated heat pressing, roller wrapping, and other load‑bearing conditions.

Comparison with standard PET high-temperature tape (green high-temperature tape)

PET substrates have a maximum temperature resistance of only about 180°C and tend to melt when exposed to higher temperatures; PTFE tape can withstand up to 260°C and also features non‑stick properties, whereas PET tape lacks any release‑liner effect.

Comparison with aluminum foil tape

Aluminum foil is resistant to neither acids nor alkalis and oxidizes easily; surface‑adhesive materials adhere strongly to it, making demolding difficult. Teflon fabric is corrosion‑resistant and non‑stick, but it lacks the thermal conductivity and shielding properties of metal.

Comparison with silicone rubber sheets

Silicone rubber sheets do not have a self-adhesive backing, making installation and fixation cumbersome; PTFE fabric tape comes with an adhesive backing, allowing for quick application to curved surfaces and irregularly shaped components, while also offering a lower coefficient of friction and superior release performance.

Summary of Core Advantages It simultaneously delivers “high-temperature resistance, non-stick release, self-adhesive backing, high strength and wear resistance, and chemical corrosion resistance,” offering multifunctional integration and making it the optimal choice for most thermal‑process applications.

Precautions for Use

Substrate surface preparation: The bonding surface must be dry, free of oil and dust; otherwise, poor adhesion and edge lifting may occur.

Temperature limits: For long-term continuous use, it is recommended not to exceed 260°C; at temperatures above 280°C, the silicone pressure-sensitive adhesive will age rapidly, lose adhesion, and release volatile substances.

Do not subject the surface to vigorous friction or sharp, hard objects: Prolonged scraping with rigid, sharp knives or metal edges can damage the surface PTFE coating, resulting in a loss of nonstick performance.

Food‑contact requirements: For direct contact with food, only food‑grade PTFE‑coated tape may be used; standard industrial‑grade tape must not come into direct contact with food.

Adhesion limitations: Silicone-based pressure-sensitive adhesives cannot bond to silicone rubber, resulting in debonding and failure.

Installation recommendation: After applying, roll the adhesive firmly to ensure tight contact, then allow it to stand at room temperature for 15–30 minutes before exposing it to high temperatures to enhance bond durability.

Aging and Replacement: Under prolonged exposure to high-temperature operating conditions, the adhesive layer gradually degrades, leading to delamination, discoloration, and material adhesion. Replace the component promptly when these issues occur.

Cutting: Use a sharp blade to trim, preventing the edge fibers from fraying.

Selection Guide

(1) Select according to thickness

0.13mm / 0.18mm: Thin type, suitable for heat-sealing knives, narrow hot heads, and precision heat pressing.

0.23 mm / 0.25 mm: A standard, mainstream specification—ideal for sealing machines, mold backing layers, and roller coating.

0.30 mm / 0.38 mm: Thickened version, designed for high wear resistance and repeated friction conditions.

(2) Select based on adhesive strength

Standard adhesive strength: suitable for flat surfaces and short-term applications, easy to remove later without leaving any residue.

High‑viscosity type: uses curved‑surface wrapping, drum rotation, and vibration equipment to prevent edge lifting at high temperatures.

(3) According to operating conditions and environment

General Industry: Coffee-colored standard PTFE cloth tape

Requires a visually transparent, light-colored processing environment: white PTFE cloth tape

For applications involving open flames and flame-retardant requirements: flame-retardant PTFE tape

Food Contact: Food-Grade Certified PTFE High-Temperature Cloth Tape

(4) Width Specifications

Supports slitting to any width; for large‑area installations, wide‑format rolls are recommended to minimize joint gaps.

Simple selection guideline: For flat‑surface heat sealing, choose the 0.23 mm universal grade; for rotary rollers and frequent friction, opt for the thickened, high‑adhesion version; when temperatures approach 260°C, prioritize the high‑temperature‑resistant, strong‑adhesion adhesive type.

Summary

PTFE high‑temperature cloth tape combines the structural strength of glass fiber with the non‑stick, high‑temperature‑resistant, and corrosion‑resistant properties of polytetrafluoroethylene. Featuring a silicone pressure‑sensitive adhesive, it offers easy installation and has become the industry‑standard release and heat‑resistant material for applications such as heat sealing, hot pressing, mold release, and thermal insulation or shielding. Key selection considerations should be aligned with… Operating temperature, friction coefficient, substrate type, and whether it comes into contact with food It matches thickness and adhesive strength; during use, ensure the working surface is clean, strictly adhere to the maximum long-term operating temperature, and avoid damaging the surface coating with sharp, hard objects, thereby significantly extending its service life. It is suitable for replacing various conventional high‑temperature tapes to address issues such as material sticking to molds and providing thermal insulation and protection.