PET resin with low dyne value and preparation method thereof

Abstract

The invention relates to PET resin with a low dyne value and a preparation method thereof. The PET resin is obtained by mixing polybutylene terephthalate, a polypropylene GMA graft and sodium polyacrylate and then adding a nano finishing agent, wherein the polypropylene has the characteristic of low dyne value and can reduce the dyne value of the surface of PET resin, however, the dyne value of the PET resin cannot be effectively reduced by purely using polypropylene grafted GMA, and sufficient reaction with the PET resin is needed through GMA groups. The positive ions of the sodium polyacrylate can increase the reaction activity of the PET and the reaction activity between the polypropylene and the PET resin, and then the sodium polyacrylate is blended with the nano finishing agent, so that the dyne value of the surface of the material is further reduced.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a PET resin with low dyne value and a preparation method thereof. Background technique [0002] A printed circuit board (PCB for short) is formed on a general substrate according to a predetermined design. In the PCB production process, lamination (such as cover film, PI film, pure rubber steel sheet, etc.) usually uses a release film for protection and isolation. At present, the common silicone release film in the existing technology will produce different degrees of silicone oil transfer after high-temperature lamination, which is manifested by residual silicone oil or mist on the board surface, which will lead to a decrease in the peeling strength of the laminated surface in the subsequent process Not even up to standard. The non-silicon release materials are mainly TPX, PTFE and FEP, etc., but such release materials with low dyne value are too expensive and are not suitable...

AI Technical Summary

Problems solved by technology

However, due to the high surface tension of PET, it is difficult to separate it from the target, which limits its application in the fields of thin films, especially PCB packaging.

There are few reports on PET resins with low dyne value. For example, in patent 201510975814.1, the dyne on the surface of PET is reduced by adding external lubricating additives, such as: oxidized polyethylene wax, stearate, stearic acid amide, etc. value, but its reduction effect is limited, and there is a risk of precipitation when added in large quantities

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