Method for mixing polytetrafluoroethylene dispersion resin with high-proportion filler

A polytetrafluoroethylene and dispersing resin technology, which is applied in the field of polytetrafluoroethylene film manufacturing, can solve the problems of low uniformity of fillers, unformable and unformable calendered films, etc.

CN112250893APending Publication Date: 2021-01-22江苏中际信通讯材料有限公司

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: 江苏中际信通讯材料有限公司
Publication Date: 2021-01-22

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Abstract

The invention discloses a method for mixing polytetrafluoroethylene dispersion resin with a high-proportion filler. The method comprises the following steps: S1, sucking a premixed polytetrafluoroethylene dispersion resin and filler mixture into supersonic jet milling equipment through a high-pressure gas negative pressure pipe, and sufficiently crushing and mixing; and S2, mixing the mixture obtained in the step S1 by adopting airflow of a fluidized bed mixer to obtain the polytetrafluoroethylene dispersion resin filler mixture blended with the extrusion aid. On the basis of existing supersonic speed crushing, a fluidized bed airflow mixing treatment step is added in the method for mixing the polytetrafluoroethylene dispersion resin with the high-proportion filler; compared with high-pressure, intermittent and short-time airflow mixing of pulse airflow mixing, the fluidized bed adopts high-pressure and low-flow airflow, and more uniform, continuous and efficient mixing can be realized. The invention further discloses a production method of the polytetrafluoroethylene product.

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Description

technical field

[0001] The invention relates to the technical field of manufacturing polytetrafluoroethylene film materials, in particular to a method for mixing polytetrafluoroethylene dispersion resin with a high proportion of fillers. Background technique

[0002] The polytetrafluoroethylene membrane material is obtained by mixing polytetrafluoroethylene and filler, blending with extrusion aid, extruding, calendering, removing extrusion aid, and sintering. PTFE film has excellent properties: low dielectric constant, low dielectric loss, and small thermal expansion coefficient, which is very suitable for millimeter wave applications. With the rise of high-speed communication, the demand for polytetrafluoroethylene film material is increasing, and the existing conventional mixing method is as disclosed in CN104723567A: polytetrafluoroethylene resin and modified filler are mixed in a three-dimensional mixer uniform. The above mixing method is used in raw materials whose ma...

Claims

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