The main function of the upper tape of the important accessories of the carrier belt packaging is to seal the carrier tape. Its quality directly affects the tightness of the components, so it is a very important thing for the carrier belt. The carrier belt can be heat sealed and pasted, which mainly depend on the material

The full name of upper tape is “electronic packaging upper cover tape”, which is abbreviated as upper tape and cover tape, in English: “cover tape”. The categories are: according to the sealing conditions, it can be divided into heat sealing upper belt and self-adhesive upper belt; According to the electrical properties of materials, they can be divided into Anti electrical type and non electrical type. The bandwidth is 5.3mm, 9.3mm, 13.5mm, 21.5mm, 25.5mm, 37.5mm, 49.5mm, 65.5mm and other specifications, and the material is generally pet as the basic material; Upper belt: the upper belt of heat sealing type can be bonded only after heating in the sealing equipment. The length of such upper belt is generally 300m / R and 480m / R; The appearance is transparent and milky white;

The self-adhesive upper tape does not need to be heated in the sealing equipment. Because the material has pressure sensitive material, it can be sealed automatically by adding pressure during sealing.

The length of such upper tape is generally only 200m / R. The appearance is transparent and brown. In terms of electrical properties, there are only two types: anti electrical type and non electrical type.

The surface resistance of the anti electric type is 107-11 Ω / □.

The surface resistance of non electrical type is more than 1012 Ω / □.