PVC protective film

Abstract

The invention discloses a PVC protective film. The PVC protective film sequentially comprises a pressure-sensitive adhesive layer, a first PVDC isolating layer, a PVC base membrane layer, a second PVDC isolating layer and a parting agent layer from top to bottom. The pressure-sensitive adhesive layer is directly coated on the surface of the first PVDC isolating layer, the PVC base membrane layer is added with plasticizer, and the pressure-sensitive adhesive layer is added with an auxiliary capable of absorbing the plasticizer. The first PVDC isolating layer is arranged between the pressure-sensitive adhesive layer and the PVC base membrane layer, and the first PVDC isolating layer can prevent the plasticizer from being transferred to the pressure-sensitive adhesive layer from the PVC base membrane layer. The second PVDC isolating layer is arranged between the PVC base membrane layer and the parting agent layer, the second PVDC isolating layer can prevent the plasticizer from penetrating through the parting agent layer from the PVC base membrane layer to be transferred to the coiled pressure-sensitive adhesive layer, the parting agent layer can prevent the coated layer of the coiled protective film from being reversely bonded to the uncoated layer, and thus the product can be uncoiled. The PVC protective film can be uncoiled conveniently, disengaging of the pressure-sensitive adhesive layer can be effectively stopped and reduced, and when the PVC protective film is directly bonded to a plate, the occurrence probability of the defects such as adhesive residues and ghost images on the plate can be effectively lowered.

Description

technical field [0001] The invention belongs to the field of protective films, in particular to a PVC protective film. Background technique [0002] PVC protective film is a kind of plastic protective film, which is calendered by polyvinyl chloride and plasticizer, heat stabilizer, modifier, ultraviolet absorber, etc. It is softer and has better mechanical properties than PE film. PVC protective film can be made into a protective film with better performance requirements than PE film according to different formulations, and is used to protect materials with special requirements. [0003] In the existing PVC protective film, when an adhesive layer is added to the PVC protective film to adhere to the board, some additives such as plasticizers are easy to migrate from the inside of the PVC protective film to the adhesive layer, thereby causing the adhesive layer of the protective film to fall off, making the Viscosity is reduced. If the PVC protective film is rolled up, the p...

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Problems solved by technology

[0003] In the existing PVC protective film, when an adhesive layer is added to the PVC protective film to adhere to the board, some additives such as plasticizers are easy to migrate from the inside of the PVC protective film to the adhesive layer, thereby causing the adhesive layer of the protective film to fall off, making the reduced viscosity

If the PVC protective film is rolled up, the plasticizer will precipitate from the back of the PVC protective film to the adhesive layer, which will cause the adhesive layer to fall off. If such a PVC protective film is directly attached to the board, it is easy to produce residual glue and ghost images. and other defects

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