Hollow film for pet gradient index sticker

CN224375190UActive Publication Date: 2026-06-19LEHUI STATIONERY NANTONG CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: LEHUI STATIONERY NANTONG CO LTD
Filing Date: 2025-05-30
Publication Date: 2026-06-19

AI Technical Summary

Technical Problem

The existing index stickers, made of plastic sheets, lack the function of inserting prompt cards. The text is easily erased, the adhesion is poor and it is easy to fall off, and the transparency is insufficient, which affects the usability.

Method used

The hollow membrane structure includes a composite design of an adhesive strip layer, a 7.5 mil PET film layer, a color printing layer, and a 1.2 mil PET film layer, which enhances flatness and achieves a gradient effect through the color printing layer. The hollow interlayer design facilitates card insertion and improves adhesion and transparency.

Benefits of technology

It achieves secure adhesion, multiple uses, and high transparency of index stickers, making it suitable for various scenarios and improving both practicality and aesthetics.

✦ Generated by Eureka AI based on patent content.

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Figure CN224375190U_ABST

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Abstract

This utility model relates to the field of hollow film technology and discloses a hollow film for PET gradient index stickers, including a hollow film body. The hollow film body is composed of an adhesive strip layer, a 7.5 mil PET glossy film layer, a color printing layer, and a 1.2 mil PET glossy film. The hollow film body uses a composite of 1.2 mil PET glossy film and 7.5 mil PET glossy film layers to enhance flatness. A color printing layer is provided between the layers. After cutting, the hollow film body only has adhesive strip layers at both ends, and the middle is hollow. After folding and pressing it onto sorting paper, the exposed part of the sorting paper is the hollow interlayer. The hollow film for PET gradient index stickers described in this utility model adopts a semi-transparent design, which will not obscure the text content, making it convenient to record ideas at any time. It adheres firmly to the paper and will not easily fall off. Different reminder cards can be inserted for repeated use, saving costs. In addition, the composite PET substrate makes the index sticker stiff and not easily damaged, facilitating secondary processing.

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