Nippon Paper Industries has been granted a patent for a modified polyolefin resin with enhanced adhesion strength to various substrates. The resin is a modified product of a polyolefin resin meeting specific conditions, including the use of an a,ß-unsaturated carboxylic acid derivative with a cyclic structure. GlobalData’s report on Nippon Paper Industries 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 Nippon Paper Industries, Sustainable packaging paper coating was a key innovation area identified from patents. Nippon Paper Industries's grant share as of March 2024 was 41%. Grant share is based on the ratio of number of grants to total number of patents.
A recently granted patent (Publication Number: US11958926B2) discloses a modified polyolefin resin with specific characteristics. The modified polyolefin resin includes a modifying component comprising an a,ß-unsaturated carboxylic acid derivative with a cyclic structure and a (meth)acrylate ester. The resin has a ring-opening degree of 40 or more, a melting point of 50°C or higher, and a weight-average molecular weight of 10,000 or more. Additionally, the ethylene structural unit content in the polyolefin resin ranges from 1 to 50 mol. %.
Furthermore, the modified polyolefin resin may contain specific a,ß-unsaturated carboxylic acids such as maleic anhydride, citraconic anhydride, itaconic anhydride, or aconitic anhydride, as well as various (meth)acrylate esters like methyl (meth)acrylate, ethyl (meth)acrylate, and others. The resin does not include chlorinated polyolefin resin and has a melting point ranging from 60 to 120°C. The ethylene structural unit content in the polyolefin resin falls within the range of 5 to 40 mol. %, and the weight-average molecular weight of the modified polyolefin resin is between 20,000 to 200,000. These specific characteristics and components define the unique properties of the modified polyolefin resin as outlined in the patent claims.
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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.
