A kind of sizing agent for after-finishing needle-punched filter felt and preparation method thereof

Abstract

The invention discloses an impregnating compound for the post treatment of needled filtering felt and a preparation method thereof, and belongs to the technical field of auxiliary agents for filtering felt. The impregnating compound is prepared from the following raw materials in parts by weight: 4 to 6 parts of polytetrafluoroethylene solution with a solid content of 60%, 8 to 10 parts of acrylic resin emulsion with a solid content of 30%, 1.2 to 1.3 parts of polyvinyl alcohol water solution with a solid content of 20%, 2.5 to 3 parts of methyl phenyl silicone oil emulsion with an oil content of 30%, 2.5 to 3 parts of dispersion liquid of coupling agent, and 75 to 85 parts of water. The provided impregnating compound has a low fluorine content and air permeability; thus the cost of post treatment of needled filtering felt is reduced, and the filtering precision of processed needled filtering felt is improved.

Description

technical field [0001] The invention discloses a wetting agent for post-finishing of needle-punched filter felts and a preparation method thereof, belonging to the technical field of auxiliary agents for filter felts. Background technique [0002] Needle-punched filter felt is made by non-woven needle-punched technology, and is made by heat setting and other treatment methods. It is widely used in industrial dust collection and smoke control. Sizing agents are required for post-finishing of needle-punched filter felts. The existing sizing agents have the following defects: First, polytetrafluoroethylene is a fluorine-containing chemical raw material. Although it can obtain a good wetting effect, the production cost is high. And the use process will also cause environmental pollution. Although the existing sizing agent reduces the fluorine content by reducing the amount of polytetrafluoroethylene, the fluorine content in the sizing agent is still relatively high, and still c...

AI Technical Summary

Problems solved by technology

Sizing agents are required for post-finishing of needle-punched filter felts. The existing sizing agents have the following defects: First, polytetrafluoroethylene is a fluorine-containing chemical raw material. Although it can obtain a good wetting effect, the production cost is high. And the use process will also cause environmental pollution

Although the existing sizing agent reduces the fluorine content by reducing the amount of PTFE, the fluorine content in the sizing agent is still relatively high, and still cannot meet the standards of the United States and the European Union

Secondly, while the existing sizing agent reduces the amount of PTFE, the sizing agent cannot cover the fiber surface well, which has a negative impact on the filtration performance of the filter mat obtained after final finishing.