Water Resistant, Biodegradable, Cellulosic Waste Bag

KaZaK proposes to develop a water resistant cellulosic waste bag constructed from typical Kraft paper and glue materials as found in traditional paper bag products. The water resistance will derive from a proprietary surface coating that is inorganic and of natural origin. The coating will be applied either without the need for binder or with very minimal use of binder. The coating has a demonstrated water resistance as measured by contact angle of 175°. An ideal contact angle is 180°. Typical hydrophobic coatings are in the range of 120° to 140°. This superior water resistance will make the Kraft bags suitable for containment of water laden food scraps and other allowable marine disposable refuse items while at-sea. Plastic bags are not optimal as they cannot be disposed of while underway due to maritime dumping restrictions given by MARPOL Annex V. As the surface coating is of natural origin and the bag substrate will be Kraft paper, which has highly acceptable biodegradation properties, the resulting product will meet the MARPOL Annex V biodegradability criteria. The extremely hydrophobic coating will render the treated paper suitable for collection of moisture laden refuse without compromising the substrate’s strength and sanitary integrity.