40g Glassine Paper Standard Grade for Adhesive Label Release Liner
Fully compliant with GB/T 29282-2024, 40 g/㎡ glassine paper is the entry-level standard for pressure-sensitive label release liners. With density ≥1.00 g/cm³, transparency ≥47%, and smoothness ≥600s (A grade), it provides a stable, non-absorbent surface for silicone coating. Ideal for daily chemical labels, supermarket barcode labels, and courier waybills.
Technical Specifications
| Parameter | Unit | Value (per GB/T 29282-2024) |
|---|---|---|
| Basis Weight | g/m² | 40 (±2.0) |
| Thickness | mm | 0.045-0.050 |
| Density | g/cm³ | ≥1.00 |
| Transparency | % | ≥47 |
| Smoothness | s | ≥600 (A grade) |
| Tensile Strength MD | kN/m | ≥3.20 |
| Tensile Strength CD | kN/m | ≥1.60 |
| Tear Strength CD | mN | ≥180 |
| Oil Absorption | g/m² | ≤1.1 |
| Whiteness (ISO) | % | ≥81 |
Process Introduction
40g glassine follows the same core process: high-fibrillation beating, AKD sizing, PVA surface sizing (4% concentration, 15-20 kg/ton), and supercalendering at 80-120°C with linear pressure 300-500 kN/m. The resulting paper has a mirror-smooth double-sided surface, oil absorption ≤1.1 g/m², and uniform density. After moisture balancing (24-48 hours, moisture variation ≤±0.5%), it is slit for silicone coating.
Uses & Distinguishing Features
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Label Release Liner – For self-adhesive labels on bottles, jars, and retail packaging; clean release with no residue.
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Courier Waybill Backing – Supports high-speed printing and die-cutting; tear-resistant.
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Masking Tape Liner – Protects adhesive until application; stable under temperature changes.
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Food Label Carrier – For ingredient labels on baked goods; moisture-proof.
Why Choose This Paper
40g meets standard industry requirements for general label applications, offering reliable release and die-cutting performance at a cost-effective weight.
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