Electrostatic filter material with flame-retardant function as well as preparation method and application thereof

Abstract

The invention provides an electrostatic filter material with a flame-retardant function as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) melt spinning: carrying out melt spinning on a component A and a component B to form a continuous double-component composite filament with a sheath-core structure, wherein the component A at least comprises a polyolefin polymer and a functional medium with an electricity storage effect, and the component B at least comprises a polyester polymer and a functional medium with a flame retardant effect, or the component B is a polyester polymer with a flame retardant property; 2) net forming: splitting the continuous double-component composite filament with a sheath-core structure to form the net; 3) reinforcing and forming: forming a two-component spun-bonded material by hot air melting, bonding and solidifying; and 4) high-voltage electrostatic treatment: charging the double-component spun-bonded material. According to the electrostatic filter material, the electrostatic filter material is a single-layer medium-efficient filter material, so that the filter efficiency equivalent to thatof a composite filter material can be achieved, and the flame retardant standard FMVSS302 of American automobile interior trim materials and the standard of GB8410 in China can be met.

Description

technical field [0001] The invention relates to a non-woven fabric, in particular to an electrostatic filter material with flame-retardant function and its preparation method and application. Background technique [0002] In the field of air filtration such as vehicle air conditioners and fresh air purification, the mainstream technology and medium and high-efficiency filtration products in the domestic and foreign markets are mainly melt-blown fine filter materials or electrostatic cotton filter materials, which are bonded by glue or ultrasonic bonding or high temperature and high pressure. , compounded with non-woven skeleton reinforcement materials to meet the standards and requirements of different grades of medium-efficiency filtration. [0003] Among the conventional medium and high-efficiency filter materials of F and H grades, the products of the above-mentioned melt-blown composite skeleton materials are also used at home and abroad, and composite filter materials a...

AI Technical Summary

Problems solved by technology

[0006] 1. Short-fiber dry-laid aggregates are mostly made of polyester staple fibers and low-melting point staple fibers blended and then hot-melted and reinforced. It is prone to heat shrinkage and large deformation due to re-melting of low melting point fibers;

[0007] 2. Wet-process staple fiber aggregates have an imminent quality hazard in the automotive manufacturing application industry that increasingly emphasizes VOC control due to the toxic odor emitted;

[0008] 3. The short-fiber dry-process and wet-process aggregates have a small rebound deformation after pleating, which is not conducive to the assembly and removal of automotive air-conditioning filters;

[0009] 4. The fiber arrangement and orientation of short-fiber aggregate components are disordered, and the appearance color is dark after molding, and the fabric style aesthetics is poor;

[0010] 5. Short-fiber aggregates are mostly impregnated with flame-retardant mother liquor and tenter-dried to achieve flame-retardant properties. The process is difficult and easy to change color. More importantly, this process cannot cope with increasingly stringent environmental protection supervision.

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