Double sided tape is a roll shaped adhesive tape made from paper, cloth, and plastic film as substrates, and then evenly coated with elastic pressure-sensitive adhesive or resin pressure-sensitive adhesive on the aforementioned substrates. It is composed of three parts: substrate, adhesive, and isolation paper (film), with PET film being the most common

Adhesive strength refers to the stress required by external forces to cause damage to the interface or adjacent areas between the adhesive and the object being bonded in a bonded component. Adhesive strength is also known as adhesive strength

Light blocking tape is a type of tape that uses special imported environmentally friendly substrates and undergoes special treatment on the surface to achieve partial or complete light blocking. It is also coated with strong adhesive and long-lasting adhesive on one or both sides of the back

The phenomenon of yellowing or graying of PET film, especially when rolled into a shaft, can be seen with the naked eye. If there are yellow stripes, the film must be unfolded or observed under light. Or lay it on top of a white background to better identify