Packaging paper manufacturers can broadly categorize their base paper materials by origin into imported and domestically produced base paper. They can also classify them by type, such as kraft paper (also known as kraft paperboard in China), corrugated base paper, packaging and printing whiteboard paper, coated kraft paper, and coated kraft paperboard. Packaging paper is typically used for packaging purposes and generally possesses higher strength and toughness, is pressure-resistant and fold-resistant, and has simpler quality requirements than other types of paper, such as printing paper. Specific inspection items for paper include: safety, hygiene, environmental protection, quality, quantity, weight, and packaging.
Packaging paper testing items:
Physical functions: appearance, dimensions, thickness, etc.
Toxic and hazardous substance testing: tobacco YC/YQ industry standard testing, food-grade testing, toxic and hazardous substance screening, etc.
Mechanical functions: compressive strength, edge crush strength, stacking strength, flap folding strength, breakage strength, disassembly strength, adhesive strength, empty carton compressive strength, impact strength, transfer strength, etc.
Other functions: moisture content, moisture resistance, mildew resistance, dampness resistance, etc.
