High-Barrier Films

In summary, good barrier properties can only be achieved by optimizing all the factors affecting the metallization process. Under these conditions, metallized layer barrier properties will be excellent. Superior barrier properties may only be achieved by using multi-layer structures. Such ultra high barrier films, formed from metallized A1 sandwiched between two acrylate layers, were first reported in 2000 [13]. 

If we compare the data in Table 8.5 with the barrier requirements set in polymer electronics (Fig. 8.11), it is evident they cannot be met with metallized films, not even with ultra-high-barrier films, multi-layer structures from metal evaporation, and polymeric layers. For transparent barriers, as required for OLEDs, displays, organic solar cells, etc., evaporated oxide layers are even further from meeting the values required. 

NAI-SMELL PLA alumina metalizing transparent high-barrier film PLA Office Media... 

Alfoil Polymer High Barrier Films (PVDC)... 

In this paper a review of our previous work on the effect of PE contacting surface in laminated cartons and of different high barrier films (in "Bag in the Box" type packages) on the shelf-life of citrus juices and the effect of d-limonene absorption on the properties of sealant films will be shown. 

LCPs can be used in thin layers or at low concentrations in blends to make cost-effective high barrier films and containers. LCP barriers have advantages over aluminized plastics and metal foil because the LCP layers can be thermo-formed, they are microwavable, recycling is easier, and metal detection systems can be used to inspect packaged foods. 

High barrier film users are currently looking for alternatives to polyvinyli-dene chloride as a barrier layer because of problems cited in melt recycling or burning PVDC. LCP laminates and coextruded films are being evaluated because evidence suggests they can be burned as easily as PLT, and their high barrier properties mean that LCP layers will be four to five times thinner than PVDC for equivalent barrier performance. 

Other food packages include polyethylene naphthalate (PEN) and PEN-PET blends as high-barrier films or rigid containers. 

Hiilsmann P, Philipp D, K6hl M (2009) Measuring temperature-dependent water transport and gas permeation through high barrier films. Rev Sci Instrum 80 113901... 

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