2. Material Composition
Typically made from a blend of hardwood and softwood pulps. Hardwood pulp (e.g., birch) contributes to a smooth surface, ideal for high-quality printing of logos or usage instructions. Softwood pulp (e.g., pine) adds tensile strength, preventing tearing during die-cutting or blister adhesion. Food-grade pulps are mandatory to avoid chemical migration, aligning with regulations like FDA 21 CFR 176.170 for indirect food contact.
3. Key Performance Metrics
Stiffness: Measured via Taber stiffness tester, it ensures the backboard maintains shape on store shelves, preventing toothbrushes from shifting.
Heat Resistance: Must withstand 80–120°C during blister sealing (thermoforming process) without discoloration or delamination.
Printability: Surface porosity is controlled to allow ink absorption, ensuring sharp, smudge-resistant graphics-critical for brand visibility.
4. Environmental Considerations
Modern variants often use FSC-certified pulps, ensuring sustainable forestry practices. Many are recyclable in curbside programs, though laminate layers (if added for moisture resistance) may require separation. Biodegradable options, incorporating plant-based fibers, are emerging to meet eco-conscious market demands.
5. Compatibility with Blister Materials
Works seamlessly with common blister plastics like PET (polyethylene terephthalate) and PVC (polyvinyl chloride). Adhesion relies on heat-activated adhesives or ultrasonic bonding, requiring the paper's surface to have consistent texture to avoid weak seals-a key factor in preventing product tampering.
6. Quality Control Standards
Manufacturers adhere to ISO 9001 for consistent production and ISO 15378 for pharmaceutical-grade packaging (relevant for premium toothbrush lines). Thickness tolerance is kept within ±5% to ensure uniform die-cutting across production batches.
Place contact us
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website：https://www.grayboardpaper.com/
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