In the adhesive tape protective film, the film coated with adhesive is called 'substrate' or 'backing '.
The substrate plays an important role in realizing the required functions in the adhesive tape and enhancing its strength.
Therefore, there are many different types and substrate design technologies that play an important role in the overall development of adhesive tape.
In packaging applications, hand tear performance is a priority. At this time, adhesives should be used in conjunction with paper substrates. In electrical applications, insulation and transparency should be emphasized, and polyester film (PET film).
When high heat resistance is required, for example, polyimide is required in welding shielding, and Polytetrafluoroethylene (PTFE)
Film, Polyolefin film should be used in the surface protective film requiring flexibility as the main performance.
The metal foil is conductive and suitable for connecting various objects, while foam is used for sealing mobile phones.
The surface processed into a undulating Polyolefin film is a good example of the substrate that is not only strong, but also hand-torn, which is suitable for architectural applications.
The surface PET protective film manufacturer ichuan film used for deep-drawing processing of articles such as water tanks is an example of substrate design, which gives full play to the characteristics of the substrate.
The cutting tape used for silicon wafers is an example of substrate design, in which case the tensile properties of plastic films are utilized.
After cutting, although the cutting belt used to fix the chip during picking is stretched, it is still within the pressure designed to withstand.
A special Polyolefin film is used as a protective film for automobile spraying. It must be able to adhere to the outline of the vehicle and withstand direct sunlight.
In recent years, the use of transparent plastic film as a protective film for mobile phones and LCD TVs has become very common.
Protective film tape substrate commonly used materials: Paper: craft paper, Japanese paper, crepe paper cloth: Rayon (Short fiber)
Cloth, cotton cloth, acetic acid cloth, PE/PP blend original film (Film)
: Cellophane, PVC, PE, OPP, PET, PTFE, PI, PC, PS raw film and other foaming materials: polyurethane, PE, butyl rubber metal foil: aluminum foil, copper foil rubber skin: natural rubber, styrene-butadiene rubber, butyl rubber