Do you know the characteristics and application scope of PET tape? Today, the editor of Hangbang will take you to learn more about it

PET tape is a milky white or light yellow highly crystalline polymer with a smooth and shiny surface. Its chemical name is polyethylene terephthalate. It is the most important variety of thermoplastic polyester and its English name is Polyethylene. terephthalate, referred to as PET, commonly known as polyester resin.

Structure of PET tape

PET tape is made of soft PET polyester film as the base material and coated with high-performance pressure-sensitive adhesive on one or both sides. It is also called PET high-temperature tape. The Peel force effect of PET tape is very good, and the viscosity can be appropriately adjusted and customized according to the use process. There are usually two kinds of glues for coating, one is acrylic glue and the other is silica gel. The price of silica gel is higher than that of acrylic glue.

Characteristics of PET tape

The physical properties and color of PET tape can be customized according to customer requirements. Colors include red, transparent, yellow, black, dark green, grass green, etc.; the adhesive force can be divided into ultra-high viscosity, high viscosity, medium viscosity, low viscosity and Ultra-low viscosity; common thickness specifications are between 0.05-0.1MM. It has good dimensional stability, thermal stability, chemical stability, good insulation, good conformability, good initial tack and sustained tack, and can be applied to wider applications temperature range and harsh environments. Acrylic PET products have long-term temperature resistance of 100-120°C and short-term temperature resistance of 140-150°C; silicone PET products have long-term temperature resistance of 140-150°C and short-term temperature resistance of 180-200°C.

Application of PET tape

Based on the above characteristics, the main industrial uses of PET tape are:

PCB/FPC circuit board industry, such as: printed circuit board gold plating, OSP gold finger protection, reinforcement, silver-based, gold-based edging, light-shielding protection, aluminum substrate protection, gold-based strip plate, ink printing screen Fixing and insulation wrapping and fixing of electronic products;

Spray painting and baking paint industries, such as: automotive industry and masking during painting of electrical appliances and machinery;

Optoelectronics industry;

Other industries.

Factors affecting the normal use of PET tape

① Type of patch (material): Patches of different materials have different internal molecular structures and different surface roughness, which affects the product fit effect. It is necessary to choose a patch with moderate adhesion according to the roughness of the surface of the patch. PET products;

② Foreign matter on the surface: Dust, oil, water vapor and other foreign matter on the surface of the object to be adhered affect the fit of the product. Residues such as chemical solvents on the surface will attack the glue part of the product and destroy the molecular structure of the glue, resulting in glue residue on the object to be adhered. It can be used Wipe with acetone or alcohol to remove glue;

③ Gluing pressure: The pressure during gluing directly affects the tightness of the adhesive tape and the object to be adhered. Suitable pressure gluing can be selected according to the different process requirements of the process;

④ Gluing temperature: Select the appropriate glue temperature according to the different objects to be attached and the production process requirements to avoid the problem of difficult to remove residual glue or weak bonding when peeling off the glue. Appropriate temperature can also improve The product's ability to fill the height differences on the surface of some special objects enables the product to better serve this process.

⑤Using environment: Whether there are sol-type liquids, aerosols, humid environments, low temperatures, etc. in the environment where the glue is applied, these will affect the bonding effect of the tape, so it is necessary to choose a suitable glue application environment to ensure that the tape is normal use.

⑥Other reasons: such as product expiration, unqualified storage environment, mismatch of process parameters, etc.