YT564 Composite Grade Aramid Paper
YT564 Composite Grade Aramid Paper
Calendered aramid paper engineered with optimized surface properties for bonding. Specially designed as the base paper for manufacturing film composite laminates (e.g. YM, YMY, YH, YHY).
Priced per requirement — tell us grade, width, thickness and quantity and we quote against it.
Technical specifications
| Composition | 100% meta-aramid fibre |
|---|---|
| Thermal class | Class H (180 °C) / Class R (220 °C) |
| Thickness range | 0.05–0.76 mm (2–30 mil), typical |
| Width range | Slit 10–1,000 mm |
| Density | 0.7–1.1 g/cm³ calendered, 0.3–0.6 g/cm³ uncalendered |
| Dielectric strength | 10–35 kV/mm, varies with thickness and grade |
| Limiting oxygen index | ≥ 28% — does not melt or support combustion |
| Form | Reels, slit to width; sheets to size on request |
| Compliance | UL, CE, RoHS, REACH |
Typical values for this material class, given as a guide. The datasheet carries the property table, test methods and tolerances for the grade and is the governing document.
Overview
YT564 is a calendered aramid paper made specifically as a base ply for laminates. Its surface is prepared for adhesion rather than for handling: the finish is controlled so that adhesive wets and keys into it consistently across the web.
In a flexible laminate the bond between paper and film is the weakest point of the construction. A base paper with an inconsistent surface produces a laminate that delaminates at the edges after thermal cycling. YT564 exists to remove that variable.
A base material, not a finished insulation
YT564 is generally bought by laminators rather than by winding shops. If you are insulating a motor directly, YT510 or YT56 is more likely what you want; if you are manufacturing NMN, NHN or similar composite structures, YT564 is the ply to build on.
It is the base paper behind the AM, APA, AH and AHA laminates we supply, so if you would rather buy the finished laminate than make it, those are the same material one step further along.
Key properties
- Surface engineered for consistent adhesive wetting and bond strength
- Calendered: uniform thickness and density across the web
- Continuous service at 180 °C (Class H), used to 220 °C
- Dimensional stability under lamination heat and pressure
- High tensile strength for web handling at line speed
- Inherently flame resistant
Applications
Flexible laminates
Base ply for two- and three-layer laminates with polyester or polyimide film.
Composite build-ups
Multi-layer insulation systems where papers and films are bonded into a single structure.
Coated products
Substrate for coated and impregnated insulation materials.
Converting
Reel-to-reel processing where consistent web tension behaviour matters.
Standards and compliance
- UL recognised component — certification held by the manufacturer
- CE marked
- RoHS compliant
- REACH compliant
- Manufactured under ISO 9001:2015
Certificates of conformity and mill test certificates are supplied with each shipment. Third-party testing can be arranged on request where a specification demands independent verification.
Sizes, packing and supply
- Thickness: 0.05–0.76 mm, typical range
- Width: slit to width, up to 1,000 mm; master reels available for converters
- Form: reels on cores, wound to your tension and diameter requirements
Quality and inspection
Every consignment is inspected before shipment and supplied with its mill certificate. For repeat programmes we hold the approved specification on file so a reorder repeats a known outcome rather than reopening the conversation.
Frequently asked questions
Can YT564 be used directly as slot insulation?
It can, but it is not what the grade is for. It is optimised for bonding, and you would be paying for a surface treatment the application does not use. YT510 is the better choice for direct use.
What adhesives does it bond with?
The common laminating adhesives used with aramid papers. If you have a specific system, tell us and we will confirm compatibility before you commit to a trial.
Do you supply master reels?
Yes. Tell us the core size, reel diameter and winding tension you need.
Can you supply the finished laminate instead?
Yes — AM, APA, AH and AHA are built on this paper. If you would rather buy the laminate than make it, those are the equivalent finished products.
Is the surface treatment visible?
Not to the eye. It shows up in bond strength testing, which is where an inconsistent base paper causes trouble.
Related products
Next step
Tell us the size and quantity
Send the thickness, slit width and annual volume for https://aramidpapers.com/wp-content/themes/aramidpapers and we come back with a costed offer, a firm lead time and the mill certificate you will receive with it.