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April, 2012
Food packaging coating
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March, 2012
NanoPack Launches Innovative "Bairicade XT™" Coating
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  Use of NANOSEAL™
Coatings to Create Clear, High-Barrier, Packaging Films
April 2010
  Summary
This document describes NanoSeal barrier coatings for packaging films and discusses the benefits (performance, economic and environmental) of using them in place of other optically-clear, barrier packaging materials.

Technology Overview
NanoSeal coatings are aqueous dispersions of vermiculite platelets in polyvinyl alcohol (PVOH). The platelets are 1-3 nanometers thick and 10-30 microns in breadth, yielding an average aspect ratio (breadth-to-thickness) of ~10,000:1. The platelets are maintained in singularized format when dispersed into the PVOH resin and aligned in the plane of the coating when deposited on a film substrate, such as polyethylene terephthalate (PET), biaxially oriented polypropylene (BOPP), biaxially oriented nylon (BON) or polylactic acid (PLA). The dispersed platelets create a tortuous path for gas molecules, enabling extraordinarily high gas barrier in a very thin layer (0.2 - 0.5 microns dry) with excellent bond strength, clarity and flexibility. The proprietary formulation also improves the moisture-resistance of the PVOH resin.
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  Use of NANOSEAL™
Coatings to Create Clear, High-Barrier, Packaging Films
March 2009
  Summary
This document describes NanoSeal barrier coatings for packaging films and discusses the benefits (performance, economic and environmental) of using them in place of other optically-clear, barrier packaging materials.

Technology Overview
NanoSeal coatings are aqueous dispersions of vermiculite platelets in polyvinyl alcohol (PVOH). The platelets are 1-3 nanometers thick and 10-30 microns in breadth, yielding an average aspect ratio (breadth-to-thickness) of ~10,000:1. The platelets are maintained in singularized format when dispersed into the PVOH resin and aligned in the plane of the coating when deposited on a film substrate, such as polyethylene terephthalate (PET). The dispersed platelets create a tortuous path for gas molecules, enabling extraordinarily high gas barrier in a very thin layer (0.2 - 0.5 microns dry) with excellent bond strength, clarity and flexibility. The proprietary formulation also dramatically improves the moisture-resistance of the PVOH resin.
Click here for more details
  ***********************************************************************************
  Mixing of BAIRICADE XT™
Bairicade XT™ is the product designation for NanoPack’s new series of higher solids barrier coatings. BXT-501 is the product code for an 8% solids coating that has enhanced adhesion and lamination bond strength. This video will demonstrate the preparation of this product.
  BXT-501 is shipped in three parts: Masterbatch, Clay Platelets and Adhesion Promoter.

The weight of Platelets is 6.3% of the Masterbatch weight. And, the weight of Adhesion Promoter is 10.0% of the Masterbatch weight.

What we have in this demonstration is a pail of Masterbatch that weighs 2 kgs.

For this weight of Masterbatch, we will need 126 grams of Platelets and 200 grams of Adhesion Promoter. The Adhesion Promoter is divided roughly into two portions at 100 grams each, or about 50% of the total Adhesion Promoter in each portion.

The first addition to the Masterbatch will be the Platelets. Start the stirrer in the Masterbatch at approximately 30 rpm. Slowly add the Platelets to the Masterbatch, and continue to stir for 2 minutes. The resulting mixture will have a swirling pattern, as the thin platelets line up with their surfaces parallel to the swirling motion of the mixture. The platelets reflect light from above.

Next, stop the stirrer and allow the mixture of Masterbatch and Platelets to come to rest.

With mixture at rest, quickly add one of the two portions of the Adhesion Promoter into the Masterbatch/Platelets mixture, and immediately turn on the stirrer at a high speed so that a vortex is created. After 10 seconds of mixing, add the second, remaining portion of the Adhesion Promoter.

Continue to stir mixture for an additional 5 minutes, and the mix is ready for use. The sign of a good coating is a good swirl pattern.

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