SK. has been granted a patent for a polyester film featuring a resin layer made from a specific mixture of polyethylene terephthalate and a polyester resin. This formulation enhances heat resistance, adhesion, and light transmittance, utilizing controlled ratios of diol moieties derived from isosorbide and cyclohexanedimethanol. GlobalData’s report on SK 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 SK, UAV battery thermal mgmt was a key innovation area identified from patents. SK's grant share as of July 2024 was 48%. Grant share is based on the ratio of number of grants to total number of patents.
The patent US12071525B2 describes a novel polyester film composed of a resin layer that integrates a mixture of polyethylene terephthalate (PET) and a polyester resin in varying weight ratios. The polyester resin is characterized by a specific structure that includes repeated acid and diol moieties, with particular emphasis on the inclusion of isosorbide and cyclohexanedimethanol as diol components. The claims detail the composition of the dicarboxylic acids used, specifying that terephthalic acid or its derivatives are included, along with limitations on the proportions of other aromatic and aliphatic dicarboxylic acids. The film's properties are further defined by the intrinsic viscosity of the polyester resin, the melting point of the PET, and the presence of various additives such as catalysts, stabilizers, and crystallizing agents.
Additionally, the patent outlines specific physical characteristics of the polyester film, including its potential for stretching in one or both directions, with defined stretch ratios. The claims also specify performance metrics for both unstretched and stretched films, including haze measurements, tan delta values, and strain percentages at elevated temperatures. These parameters are critical for applications requiring high clarity and thermal stability, making the patented polyester film suitable for various industrial uses. The detailed composition and performance specifications aim to enhance the film's utility in packaging and other applications where durability and optical properties are essential.
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GlobalData’s Patent Analytics tracks patent filings and grants from official offices around the world. 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.
