High Temperature Labels

Custom Polyimide High Temperature Labels for SMT & Harsh Environments

High temperature polyimide labels provide continuous barcode traceability and component marking across surface mount technology (SMT) reflow, wave soldering, and high-heat industrial processing. Manufactured with heat-resistant matte or gloss white topcoats, these labels maintain 100% optical barcode readability after multi-pass thermal exposure, harsh wash chemicals, and mechanical abrasion.

Substrate Base: Polyimide (PI / Kapton) film (1.0 mil to 2.0 mil thickness)
Peak Operating Temperature: 300°C (572°F) continuous up to 5 minutes; 350°C (662°F) short-term dwell
Chemical Resistance: Isopropyl Alcohol (IPA), SMT board cleaners, flux residues, saponifiers, ultrasonic wash cycles
ESD Properties: Static-dissipative topcoat and adhesive options reducing peel voltage to under 100V
Machine Compatibility: SMT Feeder cassettes (Hover-Davis, Fuji, Yamaha, Panasonic), thermal transfer printers (Zebra, Brady)
Compliance & Certifications: UL 969 Recognized (File PGJI2), RoHS 3 (EU 2015/863), REACH SVHC, Halogen-Free (IEC 61249-2-21)

PCB High-temperature Labels
Material:Polyimide. Design:Customized according to customer requirements. Color:According to customer requirements (Pantone, CMYK, or PMS). Finish:Matte, gloss, hot stamping, etc..
FPCB High-temperature Labels
Material:Polyimide(PI),PCB high-temperature labels. Design:Customized according to customer requirements. Color:According to customer requirements (Pantone, CMYK, or PMS). Finish:Matte, gloss, hot
PI High-temperature Labels
Eco-friendly materials (including inks and raw materials), with relevant certifications available for inspection.. Multiple production lines, including world-class imported equipment.. Professional

Film Structure & Material

Layer 1:

Printable Thermal/ESD Resistant Topcoat (10 µm to 15 µm). Absorbs thermal transfer resin ink and prevents topcoat yellowing under heat. Available in static-dissipative matte or gloss white.

Layer 2:

Polyimide (Kapton) Film Core (25 µm to 50 µm / 1.0 mil to 2.0 mil). Provides dimensional heat resistance, high dielectric strength, and zero thermal shrinkage.

Layer 3:

Cross-Linked High-Temperature Acrylic/Silicone Adhesive (20 µm to 25 µm). Maintains high shear bond strength to FR4, anodized aluminum, stainless steel, and ceramic substrates without charring or edge lifting.

Layer 4:

Densified Glassine Paper or PET Release Liner (50 µm to 75 µm). Precision-coated with fluorosilicone for consistent release forces during automated feeder dispensing.

Material Options

Standard SMT Polyimide Labels (1.0 mil / 2.0 mil):

Designed for top-side and bottom-side PCB tracking through reflow profiles up to 260°C.

Anti-Static / ESD Polyimide Labels:

Surface resistivity of 10^6 to 10^9 ohms/sq; limits triboelectric peel voltage to under 100V per ANSI/ESD S20.20 standards.

Removable High-Temp Polyimide Labels:

Formulated for temporary masking during wave soldering; leaves zero adhesive residue upon clean removal at 260°C.

Metal Mill High-Temp Identification Tags:

Heavy-gauge polyimide and metal-laminated tags designed for direct attachment to hot steel and aluminum coils up to 400°C.

Technical Specifications

Parameter	Specification Range	Standard Test Method
Core Carrier Material	Polyimide (PI) Film (1.0 mil / 2.0 mil options)	ISO 534
Total Thickness (Excl. Liner)	65 µm to 90 µm (2.5 mil to 3.5 mil)	ISO 534
Peak Temperature Resistance	350°C (662°F) for 90 seconds / 300°C (572°F) for 5 minutes	Internal Heat Chamber Test
Continuous Operating Range	-40°C to 260°C (-40°F to 500°F)	ASTM D1204
180° Peel Adhesion (FR4 Board)	28 N/100mm (20 min dwell) / 36 N/100mm (Post reflow)	ASTM D1000
Surface Resistivity (ESD Grade)	10^6 to 10^9 Ohms/sq	ANSI/ESD STM11.11
Peel Triboelectric Voltage	Under 100V (Static Dissipative)	ESD ADV1.0
Barcode Readability (Post-Reflow)	ANSI/ISO Grade A or B (Contrast Ratio > 75%)	ISO/IEC 15416

Industry-Specific Solutions

SMT Printed Circuit Board Assembly:

Small 2D DataMatrix labels for FR4 and ceramic substrates withstand multi-zone reflow ovens, wave solder baths, and high-pressure inline washers.

Automotive Under-the-Hood Components:

Permanent thermal tracking labels for engine control units (ECUs), transmission modules, and brake systems exposed to oil and 150°C continuous heat.

Semiconductor & Wafer Processing:

Ultra-clean, low-outgassing polyimide labels designed for high-vacuum chambers and cleanroom component identification.

Industrial Heat Treating & Metals:

Direct-attachment heat-resistant tags for steel coils, aluminum extrusions, and glass manufacturing heat-treatment processes.

Hand vs Machine Application

Feature / Metric	Manual Hand Application	SMT Auto Pick-and-Place Feeder
Primary Format	Small roll formats, pocket sheets	Precision die-cut rolls on 3 inch plastic cores
Release Liner Material	60 gsm Glassine paper liner	1.5 mil PET film liner (High tensile strength)
Dispensing Equipment	Manual benchtop dispenser	SMT Label Feeder (Yamaha, Fuji, Panasonic, Hover-Davis)
Placement Precision	±1.0 mm (Human placement variance)	±0.1 mm (Optical camera registration)
Release Force Tolerance	Standard release force range	Tight-tolerance release force (15g to 30g/25mm)

Customization

Pre-Printed 2D Barcodes & Serial Numbers:

High-density 2D DataMatrix, QR codes, and alphanumeric serialization pre-printed with 600 DPI thermal transfer resin systems.

Color-Coded Topcoats:

Topcoat color options (Green, Yellow, Blue, Red, White) for visual revision identification on PCB assemblies.

Precision Micro Die-Cut Shapes:

Custom micro-labels down to 3mm x 3mm (0.118" x 0.118") engineered for space-constrained PCB layouts.

Feeder-Specific Roll Packaging:

Rolls wound to exact outer diameter and liner width specifications matching dedicated SMT feeder cassettes.

Manufacturing & Quality Control

Our cleanroom manufacturing facility operates under ISO 9001:2015 and ISO 14001:2015 standards to eliminate contamination during label converting:

Incoming Material Inspection:

Spectrophotometer testing of topcoat dyne levels, coat-weight analysis, and static-decay measurement per master roll batch.

Precision Micro Die-Cutting:

Solid carbide rotary dies notch polyimide facestocks with ±0.1 mm dimensional accuracy without liner scoring or edge burrs.

Automated Inline Inspection:

100% optical vision camera systems inspect every label for topcoat pinholes, dimensional variance, and print registration defects.

Reflow & Chemical Validation:

Sample strips from every production lot pass through a simulated 280°C reflow profile and IPA rub test prior to final shipment release.

Packaging & Shipping

Cleanroom Packaging:

Rolls are dust-cleaned, shrink-wrapped in 4 mil anti-static poly bags, and sealed in controlled environments to prevent particulate contamination.

Core Integrity:

Wound on heavy-walled 3-inch plastic cores fitted with core plugs to prevent roll deformation during international transit.

Export Box Construction:

Packed into 5-ply double-wall corrugated shipping cartons (275 lbs/in² burst strength rating) with foam corner cushioning.

Traceability & Certificate of Analysis:

Outer boxes feature PO details, production lot number, expiration date, and an included Certificate of Analysis (CoA) confirming UL and RoHS compliance.

FAQ

Q: How do polyimide high temperature labels prevent ESD damage to sensitive SMT components during peeling?

A: Standard labels generate thousands of volts of static charge when peeled from their release liner, which can destroy sensitive microchips. Our anti-static polyimide labels feature a static-dissipative topcoat and a conductive adhesive layer. This structure bleeds off static charge, keeping the peel voltage under 100V per ANSI/ESD S20.20 standards and protecting nearby ICs from electrostatic discharge.

Q: What thermal transfer ribbon formulation must be used to print variable data on polyimide labels?

A: Polyimide topcoats require full-resin ribbons specifically formulated for polyimide substrates (such as Zebra 5095/5100, DNP TR6075, or Ricoh B110CR). Wax or wax-resin ribbons will burn off or smear during SMT reflow profiles. When paired with full-resin ribbons, the printed ink cross-links with the topcoat, resisting 300°C heat and chemical wash cycles.

Q: Can these polyimide labels withstand high-pressure inline aqueous washers and ultrasonic solvents?

A: Yes. Our polyimide facestock and cross-linked acrylic adhesive resist harsh SMT cleaning processes, including inline aqueous washers, saponifiers, and ultrasonic solvent baths (such as Isopropyl Alcohol and Terpene cleaners). The topcoat locks the printed ink in place, preventing edge lifting, image bleeding, or barcode contrast degradation.

Q: What causes high-temperature labels to turn yellow or lose barcode readability after reflow ovens?

A: Topcoat yellowing occurs when lower-grade organic polymers undergo oxidation degradation under high heat, reducing the optical contrast between the white background and black barcode lines. Our polyimide topcoats use heat-stable inorganic titanium dioxide and acrylic-silicone resins that withstand temperatures up to 350°C without charring, maintaining ANSI Grade A/B barcode scan rates post-reflow.

Q: Are your roll-fed polyimide labels compatible with automated SMT label feeders?

A: Yes. We manufacture micro polyimide labels down to 3mm x 3mm with tight die-cut tolerances of ±0.1 mm. Rolls are converted on high-tensile 1.5 mil PET film liners to prevent web snapping inside high-speed SMT feeders (Yamaha, Fuji, Panasonic, and Hover-Davis). Release forces are strictly held between 15g and 30g per 25mm to ensure consistent pick-and-place accuracy.

Q: What is the typical shelf life, lead time, and sample evaluation process for custom orders?

A: Our polyimide high-temperature labels have a shelf life of 24 months when stored at 21°C (70°F) and 50% Relative Humidity. Free sample evaluation kits and pre-cut engineering test sheets ship within 48 hours for SMT reflow profiling and chemical wash validation. Custom OEM production orders carry a standard manufacturing lead time of 7 to 10 working days following technical drawing and PO sign-off.

Huizhou Yufeng New Materials Co., Ltd. is one of the most experienced high temperature labels manufacturers and suppliers in China, featured by quality products and good price. Please feel free to wholesale durable high temperature labels for sale here and get pricelist from our factory. We also accept customized orders.

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