Berry Global Group has patented a method for producing vapor-permeable, water-impermeable, corrosion-inhibiting composites. The method involves extruding a mixture onto a nonwoven surface to create a protective film layer. The composite has a moisture vapor transmission rate of 25-1000 g/m2/day. GlobalData’s report on Berry Global Group gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Berry Global Group, Extrusion-based additive manufacturing was a key innovation area identified from patents. Berry Global Group's grant share as of February 2024 was 58%. Grant share is based on the ratio of number of grants to total number of patents.

Corrosion-inhibiting, vapor-permeable composite manufacturing method

Source: United States Patent and Trademark Office (USPTO). Credit: Berry Global Group Inc

A recently granted patent (Publication Number: US11920291B2) discloses a method for producing a composite material with corrosion protection and breathability properties. The method involves extruding a corrosion-inhibiting mixture containing an elastomer and a corrosion inhibitor onto a nonwoven surface to form a film layer. This film layer is vapor-permeable, water-impermeable, and provides corrosion protection while allowing breathability to the composite. The elastomer used in the film layer is specified to have a melt flow index ranging from 10 g/10 mins to 300 g/10 mins, with a propylene-ethylene copolymer being a suitable option.

Furthermore, the method includes additional steps such as mixing the elastomer with the corrosion inhibitor, adding a second nonwoven layer to the film layer, and treating the nonwoven surfaces with hydrophilic or hydrophobic coatings. The corrosion inhibitor, morpholine, is present in the mixture in a specific weight percentage range. The resulting composite material exhibits specific characteristics such as a defined moisture vapor transmission rate, hydrostatic head, basis weight, and elongation properties in both machine and cross-machine directions. The method also involves post-extrusion treatments like corona or plasma treatment, as well as incremental stretching of the composite at elevated temperatures to achieve desired performance attributes. Overall, the patented method offers a comprehensive approach to producing composites with enhanced corrosion protection, breathability, and mechanical properties for various applications.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.