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Improving Barrier Film Properties
Application:
The customer is required to improve the current barrier level of a coating film for a paper board juice container. This customer also wanted barrier similar to that provided by EVOH, but at a lower cost. An additional desire was improving the stiffness of the overall film.

Goals: Find an alternative to more expensive high barrier resins, which would provide barrier improvement without being over engineered. Also improve stiffness of the film to reduce bulging.

Details:

Due to cost and patent restrictions, the customer chose to replace EVOH film
with Bayer's Durethan® nanocomposite nylon. The nanocomposite provided
the required barrier and increased film stiffness by 30%. In addition, the use
of a nylon-based product improved adhesion to the paper substrate and PE 
overcoat.

Advantages: Switching to a nanocomposite provided an easy-to-use alternative to EVOH,
while also providing the needed improvement in stiffness, allowing the customer
to participate in a market previously closed to their products.

Customer Completion:

The customer was able to make a simple resin switch not requiring a costly
retro fit, or process changes.


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