Sonoco Products has patented a packaging structure with a cap layer made of post-consumer resin, an alloy layer, a barrier coating of polyethyleneimine and polyvinyl alcohol, and an overlacquer. The method involves co-extrusion, melt adhesion, and coating application. GlobalData’s report on Sonoco Products gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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Data Insights Sonoco Products Co - Company Profile

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According to GlobalData’s company profile on Sonoco Products, Magnetic lids was a key innovation area identified from patents. Sonoco Products's grant share as of January 2024 was 60%. Grant share is based on the ratio of number of grants to total number of patents.

Eco-friendly packaging structure with post-consumer resin and barrier coating

Source: United States Patent and Trademark Office (USPTO). Credit: Sonoco Products Co

A recently granted patent (Publication Number: US11884466B2) discloses a novel packaging structure designed to enhance sustainability and performance. The packaging structure comprises a cap layer made from post-consumer resin, an additional layer containing an alloy of polyethylene terephthalate, a polyolefin, and a compatibilizer, a barrier coating with a unique composition of polyethyleneimine and polyvinyl alcohol, and an overlacquer layer. The alloy used in the packaging structure may include regrind and virgin polyethylene terephthalate, polyolefin, and compatibilizer, with specific weight percentages outlined in the claims.

Furthermore, the patent also covers a formable sheet incorporating the same layers as the packaging structure, along with a thermoformed container and a formed sheet derived from this formable sheet. The packaging structure aims to achieve a low oxygen transmission rate, ensuring the preservation and quality of packaged goods. Additionally, the composition of the overlacquer layer, containing vinyl acetate and polyethylene, is detailed in the claims to optimize performance. The use of post-consumer resin in the cap layer and the innovative barrier coating matrix contribute to the sustainability and functionality of the packaging structure, making it a significant development in the packaging industry.

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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.