Suzano has filed a patent for a barrier composition that includes starch, plasticizer, and microfibrillated cellulose (MFC). The composition can be used in a multi-layer structure and the patent also covers methods for producing the composition and the multi-layer structure. GlobalData’s report on Suzano 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 Suzano, Microfibrillated cellulose production was a key innovation area identified from patents. Suzano's grant share as of September 2023 was 40%. Grant share is based on the ratio of number of grants to total number of patents.
Barrier composition comprising starch, plasticizer, and microfibrillated cellulose
A recently filed patent (Publication Number: US20230312886A1) describes a barrier composition that can be used to create multi-layer structures with improved barrier properties. The composition includes at least one starch, a plasticizer, and microfibrillated cellulose (MFC). The plasticizer makes up 10-30% of the composition by weight, relative to the mass of starch, while the MFC makes up 1.1-25.0% of the composition by weight, relative to the mass of starch.
The patent also mentions the inclusion of clay in the barrier composition, with a recommended range of 0.1-5.0% by weight, relative to the mass of starch. The clay can be selected from options such as bentonite, halloysite, vermiculite, kaolin, aluminosilicates, and montmorillonite.
The composition can be used to create multi-layer structures, with the barrier composition serving as a layer on a carrier layer made of polymers, composites, metals, alloys, glass, silicon, ceramics, wood, or paper. The carrier layer can include materials like LLDPE, PP, LDPE, HDPE, PA, PET, PLA, PBT, PBS, PBSA, PCL, PHB, PHBV, their blends, composites, and nanocomposites.
The patent also provides a method for producing the barrier composition. The method involves providing an aqueous dispersion of starch, plasticizer, and MFC, and homogenizing the dispersion by stirring. The dispersion is then heated to 80-85°C for 1 hour and cooled to room temperature under stirring. Water can be added to adjust the initial solution value if needed. The method can also include the addition of clay in the range of 0.1-5% during the initial dispersion step.
The multi-layer structure can be produced by depositing the barrier composition onto the carrier layer and drying the layers. The deposition can be done using techniques such as extrusion, co-extrusion, lamination, coating, and deposition of layers from solutions or suspensions in a liquid medium. The face of the carrier layer can be subjected to corona treatment before deposition.
Overall, this patent describes a barrier composition and a method for producing multi-layer structures with improved barrier properties. The composition includes starch, plasticizer, and MFC, and can be used in various industries where barrier properties are important, such as packaging.
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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.
