Next-gen coating for modern PCB lines: Meet the Apex series

Introducing the Apex series — a breakthrough in ultra-performance polyimide label materials designed specifically for the demands of modern PCB manufacturing. Engineered to thrive in extreme conditions, Apex delivers unmatched durability, print clarity and chemical resistance, setting a new standard for PCB labeling.

Why Apex is the future of PCB labeling

In today’s high-performance electronics environments, labels must endure intense thermal cycles, aggressive fluxes and high-pressure cleaning. The Apex series rises to the challenge with:

• Improved heat resistance: Withstands extreme thermal exposure, keeping labels secure and legible through reflow and curing.
• Enhanced chemical and flux resistance: Resists the harshest PCB chemistries, including aggressive fluxes and cleaners.
• Precision readability: Maintains barcode and small-font clarity even after multiple reflow and wash cycles.
• Superior print performance: Optimized for crisp, high-contrast thermal transfer printing, extending printhead life and ensuring long-term readability.
• Made in the USA, trusted globally: Manufactured domestically with the reliability expected from a global leader in performance label materials.

Figure 1: The Apex series is a breakthrough in ultra-performance polyimide label materials designed specifically for the demands of modern PCB manufacturing. Source Polyonics

Performance backed by data

Apex series coatings are built for today’s toughest PCB processes:

• 72% improvement in flux solder resistance compared to legacy materials
• 15% improvement in cleaner resistance, ensuring survival through high-pressure washes
• Enhanced ink transfer for sharper images and better readability, even at small font sizes
• Advanced adhesive system designed for elevated temperatures and caustic environments

Apex series at a glance

Choose the right film thickness and finish to match the board design and process needs. All Apex products are REACH/RoHS compliant, with ESD-safe options available.

• XF-101M/XF-102M — Matte white polyimide, 1 mil/2 mil
• XF-101S/XF-102S — Semi-gloss white polyimide, 1 mil/2 mil
• XF-101G/XF-102G — Gloss white polyimide, 1 mil/2 mil
• XF-101SE/XF-102SE/XF-101ME — ESD-safe semi-gloss variants for sensitive workflows

Thermal exposure guide

Typical performance includes:

• Up to 100 hours at 302° F (150° C)
• 5 minutes at 500° F (260° C)
• 90 seconds at 572° F (300° C)
  (Use case dependent — refer to TDS for exact specifications)

Engineered for demanding applications

Apex series materials are ideal for industries where durability is non-negotiable:

• PCB identification and WIP labeling
• Electronic component tracking
• Asset and warranty labeling
• Fully compatible with common PCB chemistries and fluxes used in electronics manufacturing

Print performance that lasts

The Apex series ensures labels stay readable through the entire PCB process:

• Crisp, high-contrast thermal transfer printability
• Maintains barcode and small-font clarity after heat and wash cycles

About Polyonics

Polyonics is a global leader in specialty chemistry and coating solutions for label, tag and tape converters, specialty die cutters, OEM designers and specification engineers. Their durable materials are used to produce high-performance labels, tapes and tags essential for identification, tracking, manufacturing and protection. Polyonics delivers engineered solutions that perform in the most demanding environments. The company is 100% employee-owned and headquartered in Westmoreland, New Hampshire.

For more information, visit the Polyonics website or contact info@polyonics.com.