Hydrophobic Loose Fill Peanut Compound (PBAT/Starch)

About This Product

The compound is a powder blend of polybutylene adipate terephthalate and starch, keeping the biodegradable chemistry of the water-soluble grade but formulated to resist water rather than dissolve in it. It runs on the same loose-fill foaming equipment, so a converter can produce both grades from one line depending on the shipping conditions their customers face. A water-soluble peanut is a liability in a humid container or a damp warehouse. Starch is hygroscopic: its hydroxyl groups hydrogen-bond water out of the air, and absorbed water acts as a plasticiser, softening the cell walls until the fill slumps under the load it was holding and the product settles onto the wall of the carton. This grade is formulated to keep moisture out of the cell structure, so the fill holds its structure through transit and storage instead of softening progressively along the way. Resistance to moisture in service and biodegradability at end of life are separate properties under different conditions, and holding the first does not remove the second, since the base chemistry remains a hydrolysable polyester carrying a polysaccharide. Certified compostable options are available on request. It is used in e-commerce void fill, humid climate shipping, long transit protection and in-house loose fill production. Bio Green Chem supplies the hydrophobic loose fill compound to specification on PBAT and starch ratio, bulk density, moisture resistance and foaming line compatibility, as a raw material for processing on the buyer's own line; we do not produce finished articles.