Double-sided pressure sensitive adhesive tape

Double-sided pressure-sensitive adhesive tapes can be perforated to form arbitrary shapes and have excellent machinability before being laminated onto the product. Therefore, they are used to secure products in a variety of industrial fields. In particular, because in the display parts of portable electronic instruments such as PDAs and portable phones and in nameplates, the components are small in size and have complex shapes, usually held together by double-sided pressure-sensitive adhesive tape (e.g., described in the Japanese Patent Delay Disclosure Nos.2001-323227 and 2002-188061).

Portable electronic instruments can fall off the table depending on their mode of use. In this case, portable electronics need to be durable so that they don’t crack. However, based on the double-sided pressure-sensitive adhesive tape used to secure small-size items such as portable electronic devices, the small-size items may be scattered during fall, so these conventional double-sided pressure-sensitive adhesive tapes cannot be met in terms of durability. To improve this durability, consider increasing the contact area of double-sided pressure-sensitive adhesive tape.

The problem with this is that large contact areas cannot be guaranteed due to the design and functional limitations of portable electronic instruments. In addition, in recent years, portable electronic instruments tend to be coated with water-resistant or oil-resistant coatings (such as coatings containing siloxane components) for design performance and stain resistance.

Because the conventional double-sided pressure-sensitive adhesive tape is difficult to adhere to coated surfaces coated with this paint, a double-sided pressure-sensitive adhesive tape capable of adhering to these coated surfaces is required. The purpose of this paper is to provide a double-sided pressure-sensitive adhesive tape with excellent impact resistance so that the small size component will not fall off even if the impact is applied through falling, etc., to the object in which the small-size component is secured by the double-sided pressure sensitive adhesive tape. In addition, the purpose of this paper is to provide a double-sided pressure-sensitive adhesive tape with excellent impact resistance even when the object is water or oil resistant.