Hot melt laminating device and method of membrane filter material

Abstract

The invention discloses a hot melt laminating device and hot melt laminating method of a membrane filter material. A high-temperature hot roller, a composite glue roller and a cooling roller are sequentially arranged in the vertical direction from top to bottom; a gap adjusting device is arranged between the high-temperature hot roller and the composite glue roller; and a stripping roller is tightly abutted against the cloth outlet side of the composite glue roller. A polytetrafluoroethylene membrane and a base material are synchronously input between the high-temperature hot roller and the composite glue roller in a hot melt laminating process, and are stripped by the stripping roller and rolled after a hot press forming process. The roller diameters of the high-temperature hot roller and the cooling roller are the same, and the diameters of the high-temperature hot roller and the cooling roller are phi 360-600mm; the roller diameters of the composite glue roller and the stripping roller are the same, the diameters of the composite glue roller and the stripping roller are phi 150-300mm, and a diameter ratio of the composite glue roller and the stripping roller is in a range of 1.8-2.4. The hot melt laminating device is reasonable in structure; the composite glue roller has good cooling effect and long service life; the service life is up to 8-12 months; and the composite glue roller has convenience in replacement and maintenance. The polytetrafluoroethylene membrane filter material produced by the invention ensures the physical properties and the chemical properties of the polytetrafluoroethylene membrane, and has small damage on the polytetrafluoroethylene membrane; the prepared membrane filter material and the used polytetrafluoroethylene membrane have the same pore size; and the filter efficiency of the membrane filter material is improved.

Description

technical field [0001] The invention relates to a hot-melt coating device and a hot-melt coating method for a membrane filter material, which is a method of directly coating a polytetrafluoroethylene film on the surface of a filter material substrate through a hot-melt method without using an adhesive. The invention discloses a manufacturing method and equipment structure for making a polytetrafluoroethylene membrane filter material. Background technique [0002] PTFE membrane filter material is a layered filter material that provides filtration performance by PTFE membrane and mechanical properties by the substrate. PTFE membrane has a microporous structure, small pore size and high porosity. The membrane filter material made of PTFE membrane has the characteristics of high filtration efficiency, low running resistance and long service life. It is a good choice for high temperature flue gas dust removal. The replacement products of filter materials are widely used in enviro...

AI Technical Summary

Problems solved by technology

However, during the long-term high-temperature molding process, the PTFE surface film is damaged, its pore size becomes larger, and the filtration efficiency decreases.

At the same time, its composite rubber roller has been exposed to high temperature for a long time, the cooling effect is poor, the surface temperature is high, the service life is only 3 to 6 months, and the weight of the roller is heavy, so it is very troublesome to replace

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