Film forming agent used for after finishing of medium low temperature composite needled filter felt and preparation method thereof

Abstract

The invention relates to a film forming agent used for after finishing of a medium low temperature composite needled filter felt and a preparation method thereof. The film forming agent in the invention is prepared from the following raw materials by weight percent: 6-8% of polytetrafluoroethylene with the solid content of 60%, 10-12% of polyacrylate with the solid content of 30%, 12-15% of polyvinyl alcohol aqueous solution with the solid content of 12%, the balance water. The preparation method comprises the steps that: adding water into a mixing tank; sequentially adding the polytetrafluoroethylene, polyacrylate and a polyvinyl alcohol aqueous solution while stirring; and stirring for 25-35 minutes. When the film forming agent in the invention is adopted to coat the surface of the medium low temperature composite needled filter felt, the film forming effect is good, the fluorine content is low, the cost is low, and the better air permeability is achieved, thus improving performanceand quality of products.

Description

technical field [0001] The invention relates to a film-forming agent for after-finishing a medium-low temperature composite needle-punched filter felt and a preparation method thereof. Background technique [0002] At present, the known film-forming agents for finishing needle-punched filter felts only use polytetrafluoroethylene and polyacrylate as film-forming agents. Polytetrafluoroethylene is a fluorine-containing chemical raw material, which not only has high production costs, but also causes environmental pollution during production and use. [0003] Film forming agent is the most critical component in sizing agent, its performance directly determines the effect of sizing agent, and has an important impact on the performance and quality of raw silk and yarn. How to correctly and reasonably select the type and amount of film-forming agent and the compounding of two or more film-forming agents, how to design the best sizing formulation that meets the product and process...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of high fluorine content and high cost of existing film-forming agents for wetting agents, and provide a medium-low temperature composite needle-punched filter felt with low cost, low fluorine content, and high film formation Film former for finishing