Structure & Materials
Paper Layer:
Surface: Double-coated with white pigments (kaolin, calcium carbonate) for smooth, high-quality printing.
Core: Gray or white 挂面纸板 (basis weight: 200–400 g/㎡) for stiffness and durability.
Blister Layer:
Materials: PVC (cost-effective, high transparency), PET (eco-friendly, heat-resistant), PS (high rigidity).
Process: Vacuum/blister molding or thermal lamination to create 3D cavities (e.g., grooves, protrusions).
Key Properties
| Property | Description |
|---|---|
| Stiffness & Support | Rigid paper core + blister structure protects products (electronics, toys). |
| Printability | Smooth white surface for CMYK printing (ideal for brand display packaging). |
| Moisture & Temperature Resistance | Plastic layer blocks moisture; PET withstands -20°C to 60°C (cold/room temp packaging). |
| Sustainability | Recyclable paper + optional biodegradable PET/PS (certifications: FSC, SGS). |
| Cost-Effectiveness | More durable than regular paperboard, cheaper than all-plastic solutions. |
Applications
Packaging: Electronics trays (phones, headphones), toys, medical devices, food (FDA-compliant for edibles like chocolates).
Retail & Advertising: Store displays, cosmetic boxes, gift inserts.
Industrial: Anti-static trays for precision components (ESD protection).Manufacturing Process
Paperboard Production:
Multi-ply pulping → double coating → super calendering → slitting (flatness ≤2mm/m).
Blister Molding:
Tooling: Custom molds (tolerance ±0.1mm).
Thermoforming:
Heating (PVC: 140–160°C; PET: 180–220°C) → vacuum forming → cooling.
Lamination: Direct thermal bonding of plastic films (e.g., pre-coated PET).
Post-Processing:
Die-cutting → surface treatments (matte, hot stamping, UV gloss) → QC (dimensions, folding endurance, color accuracy).Selection & Usage Guidelines
Critical Specifications:
Basis weight: 250–350 g/㎡ (balance between formability and rigidity).
Folding endurance: ≥100 cycles (prevents creasing in transit).
Surface roughness: ≤10μm (ensures sharp printing).
Certifications:
Paper: FSC, PEFC (sustainable sourcing).
Plastic: FDA (food contact), RoHS (hazardous substance-free).
Compatibility Checks:
Machine suitability: Ensure paper thickness matches blister machine capacity (e.g., 300g paper requires ≥50T pressure).
Pre-production testing: Validate ink adhesion (3M tape test).
Storage:
Moisture control (≤60% RH), UV protection, flat stacking (prevents curling).Common Issues & Solutions
| Issue | Cause | Solution |
|---|---|---|
| Blister cracking | High paper moisture (>8%) | Pre-dry to 6–7% moisture content. |
| Print delamination | Poor coating adhesion | Apply PVA primer for surface treatment. |
| Cavity deformation | Uneven mold temperature | Optimize heating/cooling zones. |
| Unpleasant odor | Recycled/poor-quality plastic | Use food-grade virgin materials (SGS-certified). |
Industry Standards & Trends
Standards: ASTM D6491 (packaging paper properties), ISO 186 (dimensional stability).
Sustainability Trends:
Bio-based alternatives: PLA (polylactic acid) blisters replacing PVC.
Circular economy: Recyclable composite structures (e.g., paper-PET laminates with separation technology).Real-World Example
A 300g/㎡ PET-blistered white board paper for smartphone packaging:
Specs: FDA-compliant, FSC-certified paper + 0.3mm PET layer.
Process: 220°C thermoforming → UV-glossed finish → die-cut to fit phone contours.
Performance: Rigid tray with anti-static properties, high-resolution brand graphics, and recyclable design.
If you need double-sided whiteboard paper for vacuum forming, you can contact us for a quotation.
address:(Factory Building) Hengyu Road 4th, Sandong Digital Park, Huicheng District, Huizhou City, Guangdong Province
whatsapp:18933510649
email:02@songhongpaper.com