Hisamitsu Pharmaceutical has been granted a patent for a support film for adhesive tape material. The film-shaped support is made of polyurethane and has a barrier layer containing an aromatic isocyanate-based polyurethane and a layered inorganic compound. The adhesive tape material also includes an overcoat layer with polyvinyl alcohol and titanium lactate, and an adhesive layer. The barrier layer composition includes an aromatic isocyanate-based polyurethane, synthetic mica, and glycerin. The glycerin content ranges from 10 wt % to 15 wt % of the total amount of the aromatic isocyanate-based polyurethane and synthetic mica. GlobalData’s report on Hisamitsu Pharmaceutical 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 Hisamitsu Pharmaceutical, microneedles for transdermal drug delivery was a key innovation area identified from patents. Hisamitsu Pharmaceutical's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.
Patent granted for a support film for adhesive tape
A recently granted patent (Publication Number: US11655395B2) describes an adhesive tape material with unique properties. The adhesive tape material consists of a support film made of polyurethane, which includes a barrier layer on one surface. The barrier layer is composed of an aromatic isocyanate-based polyurethane, a synthetic mica with an average particle diameter of 11 µm or more, and glycerin. An overcoat layer made of polyvinyl alcohol and titanium lactate is applied on top of the barrier layer. Additionally, the adhesive tape material includes an adhesive layer and may also contain a release member.
The patent claims that the amount of glycerin in the adhesive tape material falls within a range of 10 wt % to 15 wt % with respect to the total amount of the aromatic isocyanate-based polyurethane and synthetic mica. The total amount of these components ranges from 20 wt % of synthetic mica and 80 wt % of aromatic isocyanate-based polyurethane to 10 wt % of synthetic mica and 90 wt % of aromatic isocyanate-based polyurethane.
Furthermore, the patent mentions that the synthetic mica in the adhesive tape material has an aspect ratio of 1000 or greater, indicating that it consists of stacked flat structures. This unique structure contributes to the tape's properties.
The adhesive layer of the tape material may contain a plasticizer and can be a mixture of the plasticizer and an adhesive base material. Additionally, the adhesive tape material may include a release member formed on the adhesive layer.
The patent also highlights that the water vapor permeability rate of the support film with the overcoat layer is smaller than that of the support film alone. This suggests that the tape material has improved water vapor barrier properties.
Lastly, the adhesive layer of the tape material is designed to enhance the absorption rate of a drug into the skin through occlusive dressing therapy (ODT). This indicates that the tape material may have applications in the medical field.
Overall, this granted patent describes an adhesive tape material with a unique composition and structure, offering improved water vapor barrier properties and potential applications in drug delivery through occlusive dressing therapy.
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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
