PP EVOH PP sheet film
EVOH as Barrier Layer: EVOH is an excellent barrier material against gases such as oxygen and carbon dioxide, which can degrade the quality and shelf life of packaged products.
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- CHINA
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- Information
PP (polypropylene), EVOH (ethylene vinyl alcohol copolymer), and the combination of these materials (PP/EVOH/PP) offer several advantages in packaging, particularly when compared to using PP alone. Here's how the multilayer structure of PP/EVOH/PP improves packaging performance:
1. Barrier Properties:
EVOH as Barrier Layer: EVOH is an excellent barrier material against gases such as oxygen and carbon dioxide, which can degrade the quality and shelf life of packaged products. Incorporating an EVOH layer between two layers of PP increases the barrier properties of the overall package, extending freshness and, hence, shelf life of the product.
2. Moisture Protection:
Reduced Moisture Transmission: While PP already acts as a partial moisture barrier, the addition of EVOH reduces moisture transmission through the packaging material further. This is crucial for products that are sensitive to changes in humidity; these include, among many others, foodstuffs, pharmaceuticals, and electronic goods.
3. Thermal Stability:
Improved thermal performance: a combination of PP and EVOH keeps the thermal stability of PP and imparts its barrier properties contributed by EVOH. This means that the effectiveness of the packaging will remain intact even against variation in temperature, be it for storage purposes or otherwise.
4. Mechanical Properties:
Enhanced Mechanical Properties: The multilayer structure can offer higher mechanical resistance and toughness compared to single-layer PP. This could be useful in applications needing strong packaging that is able to resist handling and shipping stresses.
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