Introduction
Food packaging is essential for keeping products fresh. However, many struggles with spoilage and waste. Modified Atmosphere Packaging (MAP) offers a solution. It uses barrier trays that help extend shelf life and maintain quality. These trays work by minimizing oxygen and moisture levels. Different materials are used in MAP barrier trays, and each plays a key role. Understanding these materials can help you make informed choices as a MAP Barrier Tray supplier.
Summary Answer
MAP barrier trays are primarily made from high barrier materials such as polyethylene terephthalate (PET), polyvinyl chloride (PVC), and polyamide (nylon). These materials limit oxygen flow while allowing gases crucial for freshness to pass through. This ensures the preservation of food products effectively.
Key Materials in MAP Barrier Trays
1. Polyethylene Terephthalate (PET) PET is the most common material in MAP barrier trays. It provides excellent strength and clarity. It is also recyclable, making it an eco-friendly option.
Data Supplement:
Oxygen Transmission Rate (OTR): 3-6 cc/m² per day - Water Vapor Transmission Rate (WVTR): 0.1-0.2 g/m² per day 2. Polyvinyl Chloride (PVC) PVC has good barrier properties and is commonly used for food trays. It helps in moisture retention and provides durability to seats in transport.
Data Supplement:
Oxygen Transmission Rate (OTR): 4-12 cc/m² per day - Water Vapor Transmission Rate (WVTR): 1-2 g/m² per day 3. Polyamide (Nylon)** Nylon is praised for its high oxygen barrier capabilities. It's often used in multi-layer constructions where additional strength is required.
Data Supplement:
Oxygen Transmission Rate (OTR): 1-4 cc/m² per day - Water Vapor Transmission Rate (WVTR): 0.1-0.3 g/m² per day
Conclusion
Understanding the key materials used in MAP barrier trays is vital for anyone in the food packaging industry. Materials like PET, PVC, and nylon each offer unique benefits that can enhance the preservation of food products. Selecting the right MAP barrier tray can help reduce waste and improve product quality.
FAQ
1. What is the purpose of MAP barrier trays? MAP barrier trays are designed to extend the shelf life of food by controlling the atmosphere around it. 2. Can MAP barrier trays be recycled? Many MAP barrier trays made from PET can be recycled. Always check local recycling guidelines. 3. What food products can benefit from MAP packaging? Fruits, vegetables, pre-prepared meals, and meat products can all benefit from MAP packaging. 4. How does the oxygen barrier work? The materials used in MAP barrier trays restrict the entry of oxygen while allowing necessary gases, like carbon dioxide, to permeate. 5. Are there other materials used in MAP packaging?** Yes, other materials like ethylene vinyl alcohol (EVOH) can also be used for specific barrier properties.
