The Complete Guide to Blister Trays
# The Complete Guide to Blister Trays
> Must-read for overseas buyers: From materials to process, master blister trays in one article
## What is a Blister Tray?
A Blister Tray (also called Vacuum Formed Insert) is a plastic insert formed by vacuum forming process, widely used in packaging for electronics, cosmetics, food, medical devices, etc. Its main functions are securing products, anti-shock & scratch protection, and enhancing display presentation**.
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## Common Material Comparison
| Material | Transparency | Eco-friendliness | Heat Resistance | Typical Applications |
|---|---|---|---|---|
| PET | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | Medium | Food, Cosmetics |
| PVC | ⭐⭐⭐⭐ | ⭐⭐ | Good | Electronics, Hardware |
| PS | ⭐⭐⭐ | ⭐⭐⭐ | Poor | Toys, Daily Goods |
| PP | ⭐⭐ | ⭐⭐⭐⭐⭐ | Excellent | Food, Medical |
| ABS | ⭐ | ⭐⭐⭐ | Excellent | High-end Electronics |
💡 Sourcing Tip**: For EU/US markets, prioritize PET or PP (eco-compliant). Choose PS for cost-sensitive projects, and high-clarity PET for premium display.
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## Main Classification Methods
### By Application
| Type | Description |
|---|---|
| Product Positioning Tray | Precision fit, prevents movement during shipping |
| Display / Promotional Tray | Transparent & attractive, boosts shelf appeal |
| Shock-protection Tray | Thickened design, cushions impact |
| Compartment / Organizer Tray | Multi-cell design for organized storage |
### By Structure
– Single Cavity → One tray holds one product
– Multi-cavity → Multiple products in one tray
– Foldable → Collapsible, saves shipping space
– Nesting** → Stackable trays, optimizes warehousing
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## Production Process Flow
1. Mold Design → 3D mold designed per product specs. Aluminum molds = high precision & long life; plaster molds = low cost for sampling.
2. Sheet Heating → Heat plastic sheet to softening point (PET ~260°C, PVC ~150°C).
3. Vacuum Forming → Vacuum applied, sheet conforms to mold, takes 2-10 seconds.
4. Cooling & Shaping → Air or water cooling to ensure shape stability.
5. Trimming & Punching → Remove excess material, obtain finished tray.
6. Quality Inspection → Dimensional, visual, and load tests; reject defectives.
7. Packing & Shipping* → Final packaging and dispatch.
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## Sourcing Pitfalls to Avoid
| Common Issue | Cause | Solution |
|---|---|---|
| Large Dimensional Deviation | Low mold precision | Request first-article approval sample |
| Brittle / Easy to Break | Poor material or insufficient thickness | Specify material grade & minimum thickness |
| Strong Odor | Use of recycled material | Request material cert, reject recycled content |
| Late Delivery | Poor capacity planning | Choose established supplier with sheet inventory |
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## Why Choose Us?
✅ we know your standards & pain points
✅ Full Eco-material Range** — PET/PP all certified by FDA, EFSA, REACH
✅ Lifetime Mold Maintenance** — We maintain your molds, worry-free reorders
