PVC (Polyvinyl Chloride) adhesive tape and preparation method thereof

Abstract

The invention discloses a preparation method of a PVC (Polyvinyl Chloride) adhesive tape. The preparation method comprises the following steps of (a) coating one surface of a PVC film with a pressure-sensitive adhesive; (b) afterwards, coating with a mold release agent, which can be hardened by ultraviolet irradiation, on the other surface of the PVC film; and (c) drying through ultraviolet irradiation, so as to harden the mold release agent. According to the method, firstly, the pressure-sensitive adhesive is used for coating; next, the mold release agent is used for coating; and afterwards,the mold release agent is hardened by using an ultraviolet ray. The mold release agent can be prevented from migration, due to a high temperature, by a plasticizer in the PVC film to further influencethe attachment of the mold release agent to the PVC film; and the phenomenon that a platinum catalyst loses a catalytic effect as being toxified by chlorine in the PVC film when in use cannot occur.According to the method provided by the invention, the coating and the drying of glue and the mold release agent can be completed through one-time processing; the processing time and the waste of energy can be reduced; the waste of the transportation cost can also be reduced; and the problem that the lateral extension of a material is nonuniform due to tensile deformation in the processing processcan be also avoided.

Description

technical field [0001] The invention belongs to the technical field of films, and in particular relates to a PVC adhesive tape and a preparation method thereof. Background technique [0002] figure 1 Shown is a PVC tape, which can be used as a low-cost protective film for chip dicing. The middle layer is a PVC film 1, the outer surface of the PVC film 1 is coated with a release agent 2, and the inner surface is coated with a glue 3. The process of making the PVC tape in China is as follows: figure 2 As shown, the PVC film imported from Japan and prepared with release treatment is used as raw material, and the self-adhesive is directly coated by the glue supply equipment, and then dried in an oven and then rolled. [0003] There is following shortcoming in above-mentioned processing step: [0004] 1. Because the PVC film imported from Japan is coated with release agent, the release agent will be aged and cracked after being heated in the oven during the glue coating proce...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the technical problem that release agent is transferred to the surface of glue in the preparation process of PVC adhesive tape in the prior art, waste energy and time and affect the technical problem of adhesive tape performance, the purpose of the present invention is to provide a kind of PVC adhesive tape and preparation method thereof, the present invention The method can not only avoid the transfer of the release agent, but also complete one-time processing while ensuring the performance of the adhesive tape

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