ARclean® W-4026

Product Overview

ARclean® W-4026 is a 2 mil (51 μm) clear polyester release liner with an easy release, thermally cured, and solventless silicone coating on one side. The release coating on ARclean® W-4026 is formulated and designed to be ultra-clean and have ultra-low extractables.

Product Applications

The typical use for this product is for support and protection of pressure sensitive adhesives (PSAs) requiring easy release with practically zero extractable silicone. ARclean® W-4026 is ideally suited for applications in medical and electronics where ultra-low contamination is required, including internal hard disc drive applications.

Features and Benefits

Ultra-low extractable silicone surface prevents silicone contamination
Excellent thermal stability, aging resistance and anchorage to polyester base film
Green, environmentally friendly, solvent-free coatings
Free of PFAS (per- and polyfluoroalkyl substances)
Suitable for indirect skin and food contact, US FDA Drug Master File (21 CFR)
Retains adhesion and backside printability without silicone contamination

Technical Properties

Attribute*	Typical Values*	Test Method*
Liner release (180ᵒ, 300 in/min, EL-90233)	18 grams/2”	ASTM D5375
Extractable Silicone Release Side Extractable Silicone Back Side	4 ng/cm2 (Range <20 ng/cm2) 3 ng/cm2 (Range <20 ng/cm2)	FTIR Extractable Silicones
Ionic Contamination Specification Limits (μg/cm2)	≤0.05 – Fluoride, Chloride, Nitrite, Bromide, Nitrate, Phosphate, Sulfate, ≤0.20 – Total Anions (7) ≤0.16 – Ammonium, ≤0.20 – Total Cations (6)	Ion Chromatography
Recommended storage of unconverted product	70°F ± 20°F \| 21°C ± 11°C 50% ± 20% RH \| 50% ± 20% RH
Core type†	Fiber
Wind†	Release coated side in
Shelf life of unconverted product	Not to exceed two years from date of manufacture

†Reflects master roll conformation.
*All stated values are nominal and should only be used as a guide for selection. They are not specifications.

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