CN202410379U - Aramid fiber superfine surface impregnation needled felt - Google Patents

Abstract

The utility model discloses an aramid fiber superfine surface impregnation needled felt. The impregnation needled feltis in a layer structure; the front surface of the needled felt is an aramid fiber superfine fiber layer; the middle of the needled felt is an aramid fiber base fabric or an aramid fiber and glass fiber composite base fabric; the back surface of the needled felt is an aramid fiber layer which is rougher than the aramid fiber layer of the front surface of the aramid fiber layer; and the surfaces of the aramid fiber layers of the front and the back of the needled felt are respectively provided with a polytetrafluoroethylene protective film. The aramid fiber superfine surface impregnation needled felt has the advantages that chemical gas corrosion resistance is good, and tension strength is high; as the surface filtration is adopted, the stripping quality to dust is good, dust is easily cleaned, the dust-cleaning resistance is high, the service life of a filter material is long, and the filtration accuracy is high.

Description

The ultra-fine surface layer dipping of aramid fiber Nomex

Technical field

The utility model relates to fiber needled felt, the ultra-fine surface layer dipping of particularly a kind of aramid fiber Nomex, and this material can be used for aspects such as clarifying smoke material collection and equipment protection, can also be used for the technical field of liquid-solid separation and gas solid separation.

Background technology

At present; In the lower occasion of some filtrating smoke dust temperature, like the filtering material that iron-smelter, garbage burning factory, blast furnace gas length etc. are used, its particle has some sharp-pointed corner angle; Wearing and tearing to filtrate are relatively more severe; In these occasions, also there are these some corrosive gas in the flue gas simultaneously, cause the corrosion of filtrate easily.

The utility model content

The technical problem of the utility model provides a kind of Heat stability is good, the ultra-fine surface layer dipping of chemically-resistant gas attack property aramid fiber good, that filtering accuracy is higher Nomex.

In order to solve above technical problem; The utility model provides the ultra-fine surface layer dipping of a kind of aramid fiber Nomex; This Nomex is a layer structure, and the front of Nomex is an aramid fiber superfine fibre layer, and the centre is aramid fiber base cloth or aramid fiber and the compound base cloth of glass; Reverse side is the aramid fiber layer thicker with respect to the front, at positive and negative aramid fiber laminar surface one deck polytetrafluoroethylene (PTFE) diaphragm is set.

The superior effect of the utility model:

1) the chemically-resistant gas attack is good, and hot strength is high;

2) adopt both surface filtration, the stripping performance of dust is good, easy-to-clean ash;

3) anti-deashing ability is high, the long service life of filtrate;

4) filtering accuracy is high.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Label declaration among the figure:

1-aramid fiber superfine fibre layer; The compound base cloth of 2-aramid fiber base cloth or aramid fiber and glass;

3-thicker aramid fiber layer.

The specific embodiment

Below in conjunction with Fig. 1 and specific embodiment the utility model is at length explained.

The utility model provides a kind of aramid fiber surface layer dipping Nomex; This Nomex is a layer structure; Aramid fiber 1 is adopted in the front of Nomex; Aramid fiber base cloth or aramid fiber and the compound base cloth 2 of glass that base cloth adopts, reverse side adopts the aramid fiber 3 thicker with respect to the front, then the three is got into needing machine together and reinforces.

The ultra-fine surface layer Nomex of aramid fiber integral body is immersed in the emulsion of polytetrafluoroethylene (PTFE) configuration, makes each root fiber of filter material surface that one deck polytetrafluoroethylene (PTFE) diaphragm all arranged, filtrate just has good acid-alkali-corrosive-resisting performance like this.

Ptfe emulsion is meant and adopts 15～35% polytetrafluoroethylene (PTFE) to concentrate dispersion liquid, 1～6% adhesive, 0.5～2% silicone oil, 0.5～1.5% silane coupler, 0.2～1% lead acetate and the composite a kind of mixture of water.

The utility model is dropped into actual operating mode use, through fact proved, the continuous operation temperature of the utility model is 120 ℃ ~ 2040 ℃; Moment, serviceability temperature was 210 ℃; Brute force>=1000N/5 * 20 ㎝ radially, broadwise brute force>=1300N/5 * 20 ㎝, radial fragmentation percentage elongation≤45%; Broadwise elongation at break≤55%, air permeability 8-10m ³/ m ²Min.

Claims (1)

1. the ultra-fine surface layer of aramid fiber floods Nomex; It is characterized in that: described aramid fiber surface layer dipping Nomex is a layer structure; The front of Nomex is an aramid fiber superfine fibre layer; The centre is aramid fiber base cloth or aramid fiber and the compound base cloth of glass, and reverse side is the aramid fiber layer thicker with respect to the front, at positive and negative aramid fiber laminar surface one deck polytetrafluoroethylene (PTFE) diaphragm is set.

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