Double Sided PE Coated Release Paper (PEK) | Differential Release (Light/Tight)

Double Sided PE Coated Release Paper (PEK Liner)

Charmetack Double Sided PE Coated Release Paper (PEK) is the ultimate solution for moisture-sensitive applications. By sealing both sides of the base paper with Polyethylene (PE), we create a "Lay-Flat" liner that remains dimensionally stable and curl-free even in high-humidity environments. It is the preferred carrier for double-sided tapes and precision die-cutting.

Differential Release Capability — We customize the release force gap (e.g., Light Side 5g vs. Tight Side 20g) to ensure perfect transfer without "pre-release" issues.
Superior Moisture Barrier — The double-sided PE coating prevents moisture absorption, eliminating the risk of "cockling" or "tunneling" during storage and shipping.
High Stiffness & Smoothness — Available in White Woodfree or Yellow Kraft bases, providing the rigidity needed for rotary die-cutting and high-speed automatic dispensing.

Get a Custom Quote: Specify your required Release Force Ratio (Side A/B) and Paper Color (White/Yellow). We offer free differential testing samples.

product description

The "Lay-Flat" Standard for Double-Sided Tapes.

Charmetack’s **Double Side PEK Release Paper** is engineered for maximum dimensional stability. By coating both sides of the base paper with Polyethylene (PE), we create a moisture-proof barrier that prevents curling ("tunneling"), even in humid environments.

Specifically designed for tape converters, we offer precise **Differential Release** coatings (e.g., Side A: 5g / Side B: 20g), ensuring smooth and consistent dispensing for all adhesive transfer applications.

Why Choose Our PEK Liner?

Moisture Resistant (Lay-Flat): The double PE layer locks out humidity, ensuring the paper stays flat during shipping and storage. No more "curled edges" jamming your machines.
Differential Release (Light vs. Tight): We customize the release force gap between Side A and Side B to prevent "pre-release" issues during tape slitting.
High Stiffness: Using premium Woodfree or Kraft base paper (80g-140g), our liner offers excellent stiffness for rotary die-cutting.
Solvent-Free Silicone: Our eco-friendly coating system ensures SAS >95%, meaning no silicone migration to contaminate your adhesive.

Technical Specifications

Tailored for Tape Manufacturers & Converters.

Parameter	Details
Base Paper	• White: Woodfree Paper (High Whiteness) • Yellow: Kraft Paper (Industrial Look)
Structure	Silicone / PE / Paper / PE / Silicone
Basis Weight (Total)	Common Specs: 95gsm, 110gsm, 120gsm, 140gsm
Release Force	• Differential: e.g., 5g / 15g (1:3 Ratio) • Equal: e.g., 10g / 10g (Double Sided Tape)
PE Coating	Matte or Glossy (Solvent-less Silicone compatible)
Width	Slitting available from 20mm to 1540mm

Typical Applications

Double Sided Tapes: Liner for tissue tape, foam tape, and PET mounting tape.
Adhesive Transfer Tapes: The differential release allows the glue to stay on the "tight" side when unrolled.
Die-Cut Parts: Stiff liner for kiss-cutting precision parts (e.g., velcro, gaskets).
Self-Adhesive Membranes: Waterproofing sheets for construction (using heavier 140gsm paper).

FAQ: PEK Release Paper

Q: Why do I need Double Sided PE coating?

If you only coat PE on one side, moisture can enter from the back, causing the paper to curl like a tube. Double PE seals the paper completely, keeping it flat ("Lay-Flat") even in humid Asian or tropical climates.