What Is Heat Resistant Tape?

Quick Facts

• Backing material: Biaxially oriented PET film (typical thickness: 36–75 µm)
• Adhesive system: Silicone (up to 260°C) or Modified Acrylic (up to 200°C)
• Temperature resistance limit: 150°C continuous (acrylic) / 200–260°C continuous (silicone)
• Dielectric strength: 3,000–7,000 V (per ASTM D1000)
• Core industrial uses: Powder coating masking, transformer insulation, PCB soldering protection, anodizing, heat sublimation printing
• Clean removal: No adhesive residue after exposure at rated temperature

Technical Specifications & Material Science

Backing: Biaxially Oriented PET Film

The biaxially oriented polyester (BoPET) film used in industrial heat resistant tape undergoes simultaneous machine-direction and transverse-direction stretching during manufacture. This process aligns the polymer chains in two axes, resulting in high tensile strength (>150 N/25 mm), low thermal shrinkage (<1.5% at 150°C for 30 min per ASTM D1504), and a smooth surface that accepts precise adhesive coat weights. PET film retains mechanical integrity up to approximately 220°C short-term; above this threshold, dimensional stability degrades.

Adhesive System: Silicone vs Acrylic

Silicone adhesive systems are cross-linked organopolysiloxane networks. The Si–O backbone bond energy (~450 kJ/mol) significantly exceeds that of C–C bonds (~346 kJ/mol), conferring thermal stability to 200–260°C continuous and short-term excursions to 300°C. Critically, silicone adhesives do not undergo thermal decomposition into sticky residues at rated temperatures—enabling clean, residue-free removal after powder coating or wave soldering cycles. Modified acrylic adhesive systems offer lower cost and adequate performance to 150–180°C, but may leave residue if exceeded.

Standard Technical Parameters — JTT-Tape PET Silicone Heat Resistant Tape

Industrial Applications

1. Powder Coating & Electrostatic Spray Masking

Powder coating ovens operate at 180–220°C for 15–30 minutes. Standard pressure-sensitive tapes using rubber or low-grade acrylic adhesives soften, bleed adhesive onto the substrate surface, or allow paint penetration under the tape edge. PET silicone heat resistant tape withstands these thermal cycles with edge bleed resistance <0.1 mm and removes cleanly without residue, protecting threaded holes, mating surfaces, and precision bores. Its dimensional stability under heat prevents the tape edge from curling—a failure mode that allows overspray ingress.

2. Transformer Winding & Motor Coil Insulation

High-frequency and distribution transformers generate localized winding temperatures classified under IEC 60085 thermal class F (155°C) or H (180°C). PET silicone tape with a dielectric strength of ≥5,000 V serves as interlayer insulation between winding layers, preventing turn-to-turn short circuits. The tape's elongation of ≥80% allows conformance over wire bundles without cracking the adhesive layer—critical for maintaining insulation continuity under vibration and thermal cycling.

3. PCB Wave Soldering & SMT Reflow Protection

Wave soldering bath temperatures reach 250–260°C; SMT reflow profiles typically peak at 245–260°C per IPC-7711/7721. Components, gold fingers, or connector pads that must remain solder-free require masking with tape that survives the full thermal profile without delaminating or transferring adhesive onto plated contacts. PET silicone tape rated for 260°C short-term is the industry-standard solution for this application, replacing plugs and liquid solder masks where reuse and speed are priorities.

4. Anodizing & Electroplating Line Protection

Anodizing tanks operate with sulfuric acid electrolytes at 18–22°C, but pre-treatment steps—including alkaline etching baths and oven drying cycles at 60–120°C—require masking tape with chemical resistance to acids/alkalis and moderate heat tolerance. PET film's inherent chemical resistance combined with the silicone adhesive's non-interaction with common plating chemistry makes it suitable for protecting machined surfaces, ID bores, and cosmetic faces throughout the anodizing sequence.

5. Heat Transfer & Sublimation Printing Fixture

Dye-sublimation presses operate at 180–200°C for 30–60 seconds. PET silicone tape is used to register and hold transfer paper precisely on substrates (textiles, ceramic, metal panels) during the press cycle. The tape must release cleanly after the heat cycle without ink transfer or adhesive migration onto the printed surface. A tape with silicone adhesive and a smooth, low-profile backing prevents embossing marks in the final print.

Silicone vs Acrylic vs Polyimide: How to Choose the Right Heat Resistant Tape

Procurement engineers frequently face three options. The table below compares them on the parameters that drive purchasing decisions in high-temperature applications.

Decision rule: For applications operating continuously at 150–200°C with clean removal requirements and cost sensitivity—powder coating, transformer insulation, sublimation printing—PET + silicone adhesive provides the optimal performance-to-cost ratio. Polyimide tape is justified where operating temperatures exceed 200°C continuously, or where the application demands the thinnest possible insulation layer (<25 µm backing). Acrylic-adhesive PET tape is appropriate only where peak temperatures remain reliably below 150°C.

Customization & Supply Capabilities

JTT-Tape, manufactured by JIAOTAOTAO New Materials (Dongguan), operates 8 automated coating lines across a 6,000 m² facility established in 2009. The following OEM and custom supply services are available to B2B buyers:

• Custom Slitting: Width tolerance ±0.5 mm, available from 3 mm to 1,200 mm. Jumbo rolls slit to finished rolls per customer specification.
• Custom Roll Length: Standard 33 m; OEM options at 50 m, 100 m, or specified yardage. Core ID: 25 mm, 50 mm, 76 mm available.
• Die-Cutting: Custom shapes, frames, gaskets, or kiss-cut sheets for automated dispensing on production lines. Die-cutting tolerance: ±0.2 mm.
• Color Customization: 13+ standard colors available in silicone series (black, transparent, amber, green, blue, red, yellow, pink, orange, purple, rose red, deep yellow, white). Custom color matching on request.
• Private Label & OEM Packaging: Custom core printing, carton labeling, and spool packaging for distributor and brand programs.
• Free Sample: Pre-production sample rolls (typically 1–3 widths) dispatched within 5 business days for qualification testing.
• MOQ Flexibility: Standard MOQ 1 carton (~20–50 rolls depending on width). Large-volume blanket orders with scheduled releases accepted.
• Lead Time: Standard specifications: 7–15 business days ex-factory. Custom die-cut or non-standard: 15–25 business days.
• Certifications: ISO 9001:2015, SGS tested, UL94 V-0 film.

FAQ for Engineers & Procurement

Request a Data Sheet, Free Sample, or Factory Quote

PET silicone heat resistant tape with a 200°C continuous / 260°C short-term rating, ≥5,000 V dielectric strength, and verified residue-free removal covers the majority of industrial masking, insulation, and fixturing applications that procurement engineers encounter—including powder coating, transformer winding, wave soldering protection, anodizing masking, and sublimation printing.

JIAOTAOTAO (JTT-Tape) manufactures these tapes at source, with 8 automated coating lines, ISO 9001:2015 certification, and full OEM capability—custom width slitting, die-cutting, roll length, and private label. No intermediary margin.