BENZ Packaging has introduced a minimum of 30% post-consumer recycled polyethylene across its BENZPACK® VCI film range. The films use vapour corrosion inhibitors (VCI) to protect metal components and machinery from corrosion during storage and shipping.
BFSV Verpackungsinstitut Hamburg independently tested a film sample containing 30% post-consumer recycled polyethylene under TL 8135-0043. The sample achieved Grade 3, the highest corrosion protection grade under the test method.
Recycled polyethylene can vary in how it flows during processing and in what residues it carries from its previous use. Both can affect how evenly the corrosion inhibitor is distributed in the film. BENZ Packaging’s R&D team introduced checks on incoming resin and adjusted how it mixes the inhibitor into the film.
“A VCI film has one job. The part must come out of the pack exactly as it went in, whether it has spent six weeks in a container through the monsoon or a year in a warehouse,” said Chaitanya Chopra, Director at BENZ Packaging.
“No two lots of post-consumer resin behave the same, and VCI chemistry is sensitive to that,” said Vaishnavi Gattupalli, Head of R&D at BENZ Packaging.