1. Structure and classification
Layer design:
Surface layer: bleached wood pulp (Russian/Canadian coniferous pulp), providing high whiteness (70%-80%) and printability.
Bottom layer: unbleached kraft pulp or recycled pulp (US waste/European waste), giving high strength and toughness.
2. Physical properties
Strength index (taking 150g as an example):
Burst strength: 560–590 kPa
Edge pressure strength: 2.5–3.0 kN/m
Ring pressure strength: 190–200 N79.
Environmental adaptability:
Moisture resistance (Cobb60 ≤25 g/m²), suitable for frozen food packaging.
Low temperature resistance (-25°C without brittle cracking).
3. Printing and processing performance
Printability:
Coated kraft paper supports high-definition printing (175 LPI), with a color reproduction of 98% Pantone.
White noodle kraft paper is suitable for ordinary offset printing, but is easily affected by "whiteness difference" and "yellowing".
Processing compatibility:
Die-cutting tolerance ±0.1mm, suitable for high-speed production lines (12k sheets/hour).
4. Safety and environmental protection
Food grade certification: no fluorescent agent, compliant with FDA CFR 21, can directly contact food.
Sustainability:
The bottom layer contains 70%+ recycled fiber (FSC certification).
Can be fully recycled and degraded (OECD 301B standard).
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