Eni has filed a patent for a multilayer biodegradable film that is suitable for packaging and offers high mechanical properties and optical transparency. The film consists of different layers, including an aliphatic and/or aliphatic-aromatic biodegradable polyester or polyvinyl alcohol, a polymer of natural origin, a polyhydroxy alkanoate, and optionally an inorganic filler and cross-linking agent. GlobalData’s report on Eni 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 Eni, Microscale biofuel reactors was a key innovation area identified from patents. Eni's grant share as of September 2023 was 64%. Grant share is based on the ratio of number of grants to total number of patents.
A recently filed patent (Publication Number: US20230311460A1) describes a multilayer film that has potential applications in packaging and agriculture. The film consists of at least one first layer (A) and at least one second layer (B), arranged in a mutual A/B/A arrangement. Layer A is made of an aliphatic and/or aliphatic-aromatic biodegradable polyester or a polyvinyl alcohol or copolymers thereof. Layer B, on the other hand, comprises various components including a polyester, a polymer of natural origin, a polyhydroxy alkanoate, an inorganic filler, and a cross-linking agent and/or chain extender.
The aliphatic-aromatic polyester in layer A can be composed of specific dicarboxylic and diol components, with varying proportions of aromatic, saturated aliphatic, and unsaturated aliphatic acids. The saturated aliphatic dicarboxylic acids in component c2 of the polyester can include succinic acid, adipic acid, azelaic acid, sebacic acid, brassylic acid, their C1-C24 esters, or mixtures thereof. Adipic acid and azelaic acid, or mixtures thereof, are specifically mentioned as suitable options.
The film is characterized by high transmittance values (>90%), low Haze values (<65%), and clarity over 20%, as measured according to standard ASTM D1003. It is also claimed to be biodegradable under home composting conditions according to UNI 11355.
The patent also mentions the use of the multilayer film in packaging, particularly for bags used in carrying goods and food packaging. Additionally, it suggests the film's application in mulch films for agriculture.
Overall, this patent describes a multilayer film with specific compositions and properties that make it suitable for various packaging and agricultural applications. The film's biodegradability and transparency characteristics could make it an attractive option for environmentally conscious industries.
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