Sealed Air has been granted a patent for a multilayer film featuring a heat seal layer and a high oxygen transmission layer. The film, with a total thickness of at least 1.5 mils, achieves an oxygen transmission rate of at least 8,000 cc (STP)/m²/day at specified conditions. GlobalData’s report on Sealed Air 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 Sealed Air, Fiber-reinforced material joining techniques was a key innovation area identified from patents. Sealed Air's grant share as of June 2024 was 61%. Grant share is based on the ratio of number of grants to total number of patents.
Multilayer film with high oxygen transmission and heat seal layer
The granted patent US12043013B2 describes a multilayer film designed for packaging applications, particularly in food products. The film comprises a first outer layer that functions as a heat seal layer, constituting 1 to 20 percent of the total film thickness, which ranges from 1.5 to 4.0 mils. The core of the film includes at least one second layer that serves as a high oxygen transmission layer, made from a blend of a heterogeneous ethylene/alpha-olefin copolymer and various other polymers, including ethylene acrylate copolymer and ethylene/vinyl acetate copolymer. This second layer accounts for 60 to 98 percent of the total thickness and provides an oxygen transmission rate of at least 8,000 cc (STP)/m²/day/1 atm at 23°C and 0% relative humidity, as measured by ASTM 3985.
Additionally, the patent outlines the potential inclusion of a third outer layer, which acts as a skin layer, also comprising 1 to 20 percent of the total thickness. The multilayer film exhibits various mechanical properties, such as a tensile strength at break of at least 6,000 psi, an elongation at break of less than 700%, and a Young's modulus of at least 5,000 psi, all measured according to ASTM D882. The film may also feature crosslinked polymer networks and is characterized by specific free shrinkage and impact strength properties. The patent further details applications of the multilayer film in packaged products and skin packages, emphasizing its utility in maintaining food quality through effective oxygen barrier properties.
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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.
