Billerud has been granted a patent for a coated paperboard featuring a specific pigment coating. This coating includes a mixture of calcium carbonate pigments and clay, combined with a binder, and adheres to defined particle size and weight ratios, enhancing the paperboard’s properties. GlobalData’s report on Billerud 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 Billerud, Sustainable packaging paper coating was a key innovation area identified from patents. Billerud's grant share as of July 2024 was 61%. Grant share is based on the ratio of number of grants to total number of patents.
Coated paperboard with specific pigment and binder composition
The granted patent US12018436B2 describes a coated paperboard designed for various applications, particularly in packaging. The paperboard features a base board with a top side that is coated with a pigment mixture, which includes a specific combination of calcium carbonate (CaCO3) pigments and clay. The pigment mixture consists of 0-10% clay, 60-90% of a first CaCO3 pigment, and 5-25% of a second CaCO3 pigment, ensuring that the combined amount of clay and the second CaCO3 pigment is at least 10%. The patent specifies detailed parameters for the particle size distribution of the pigments, the type of binder used (either a styrene-butadiene or styrene-acrylate copolymer), and the dry weight ratio of pigment to binder, which ranges from 100:16 to 100:20.
Additionally, the patent outlines various embodiments of the coated paperboard, including specifications for coat weight, the use of kaolin clay, and the potential for a pre-coating layer. The base board can consist of multiple paper layers, and the reverse side may also be coated. The rheology modifier, which is crucial for the coating's application properties, can be a cellulose derivative or an acrylic co-polymer, with specified weight percentages. The patent also includes a method for producing this coated paperboard, emphasizing the application of the pigment coating composition on the base board, which may be further processed into packaging for food or liquids.
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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.
