Shrink vacuum bags are essential for modern food packaging as they extend shelf life, préserver la saveur, et améliorer la présentation. This guide will help you compare PA / PE, PA/EVOH/PE, PVDC, and EVA/PE shrink vacuum bags, so you can select the best option based on structure, barrier performance, flexibility, pros & cons, and recommended applications.
🔍 Overview: Four Shrink Vacuum Bag Materials Compared
| Feature | PA / PE | PA/EVOH/PE | PVDC | EVA/PE |
|---|---|---|---|---|
| Structure | PA + PE | PA + Evoh + PE | PVDC multilayer | EVA + PE |
| Oxygen Barrier | Medium | High | Very High | Low to Medium |
| Moisture Barrier | Good | Good | Excellent | Moderate |
| Flexibility / Softness | Medium | Medium | Stiff | Very soft |
| Clarity / Gloss | High | High | Moderate | Moderate |
| Sealability | Excellent | Excellent | Good | Excellent |
| Shelf Life Extension | Moderate | Long | Longest | Short to moderate |
| Recyclability | Better | Moderate | Poor | Better |
| Cost Level | Low | Moderate | Higher | Low to moderate |
| Shrink Temperature (°C) | 85–90 | 85–90 | 85–90 | 80–90 |
🔷 1. PA/PE Shrink Vacuum Bags – Affordable & Durable
-
Structure: Co-extruded Nylon (PA) + Polyethylene (PE)
-
Barrier Performance: Medium oxygen barrier, good moisture resistance
-
Flexibility: Strong, moderate softness
✅ Advantages
-
Cost-effective for high-volume use
-
Excellent puncture resistance (ideal for bone-in cuts)
-
Clear and glossy finish
-
Reliable vacuum seal
⚠️ Limitations
-
Limited barrier for long-term storage
-
Not ideal for export-grade or high-sensitivity products
🎯 Best For
-
Fresh or frozen meat (beef, pork, lamb)
-
Cheese blocks
-
Sausages and hams
🔷 2. PA/EVOH/PE Shrink Vacuum Bags – Balanced High Barrier
-
Structure: PA + EVOH layer + PE
-
Barrier Performance: High oxygen barrier thanks to EVOH
-
Flexibility: Moderate strength and softness
✅ Advantages
-
Superior oxygen and aroma barrier
-
Extends shelf life significantly
-
Maintains flavor, color, and quality
-
Ideal for cold chain and export
⚠️ Limitations
-
Higher cost than PA/PE
-
EVOH sensitive to humidity—requires proper storage
🎯 Best For
-
Premium cheese
-
Seafood and tuna
-
Exported vacuum-packed processed meats
🔷 3. PVDC Shrink Vacuum Bags – Premium Shelf Life Protection
-
Structure: Multilayer film coated with PVDC
-
Barrier Performance: Exceptional oxygen and moisture barrier
-
Flexibility: Stiffer, less conformable
✅ Advantages
-
Longest shelf life among shrink materials
-
Excellent aroma retention
-
Smooth, high-gloss surface
-
Ideal for high-fat or fermented products
⚠️ Limitations
-
Less eco-friendly (poor recyclability)
-
Higher material cost
-
Performance affected by high humidity environments
🎯 Best For
-
Smoked ham, salami, cured meats
-
Aged cheese
-
Bone-in meat for export
-
High-end chilled ready-to-eat meats
🔷 4. EVA/PE Shrink Vacuum Bags – Flexible & Lightweight
-
Structure: EVA (Ethylene‑Vinyl Acetate) + PE
-
Barrier Performance: Lower than EVOH or PVDC
-
Flexibility: Very soft and pliable, conforms closely to product shape
✅ Advantages
-
Excellent shrink rate and softness
-
Ideal for irregular-shaped products
-
Cost-effective and easy to seal
-
Lightweight and efficient for automation
⚠️ Limitations
-
Low oxygen barrier—reduce shelf life
-
Not recommended for export or long-term storage
🎯 Best For
-
Soft cheese for short-term use
-
Domestic chilled fresh meat
-
Small portions and value packs
-
Products requiring fast, tight shrink wrapping
✅ How to Choose the Right Shrink Vacuum Bag
| Product Type | Recommended Material |
|---|---|
| Standard fresh or frozen meat | PA / PE |
| Premium cheese or seafood export | PA/EVOH/PE or PVDC |
| Aged or cured meats | PVDC |
| Short-term soft cheese or retail snack | EVA/PE or PA/PE |
| Irregular product shapes needing tight wrap | EVA/PE |
🛠️ Application Steps for Shrink Vacuum Bags
-
Load Product: Place the item into the shrink vacuum bag.
-
Vacuum Seal: Use a chamber vacuum sealer to evacuate air and seal.
-
Hot Water Shrink: Immerse sealed bag in 85–90°C water for 1–5 seconds.
-
Cool Down: Let it air-dry or move to chilled water.
-
Store or Ship: Transfer to refrigerated or frozen cold chain storage as required.
🌍 Why Work With Us?
-
Custom Options: Film thickness, bag size, and color tailored to your needs
-
Certifications: Compliant with FDA, EU, BRC, ISO standards
-
Sustainability Options: Recyclable EVOH-PE variants available
-
Support: Free shrink trials, product testing, and technical consultation
-
📩 Contact us today for samples and expert packaging advice.
