Abstract: Self-adhesive poly (vinyl chloride) (PVC) films were prepared via casting molding. The effects of content of plasticizer dioctyl phthalate (DOP), variety and content of thickening agent, film thickness, surface roughness, surface tension, and precipitate on the bonding strength of PVC films were studied using digital high resistance meter, atomic force microscopy, video optical contact angle measuring instrument and Fourier transform infrared spectroscopy. It was found that the bonding strength of PVC film increased with increasing plasticizer content. The addition of thickening agent significantly improved the self-adhesive of PVC films, in which terpene resin was the best. Self-adhesive of PVC films was influenced by surface energy of the films in question.

Key words: film, self-adhesive, thickening agent, surface energy, poly(vinyl chloride)