CN1156327C - Compound spiked felt of purifying industrial smoke and its producing method - Google Patents

Abstract

The present invention relates to compound needle-punched felt for purifying industrial smoke and a manufacturing method thereof, and the compound needle-punched felt is developed and improved on the basis of the inventor's 98114419.5 patent. The compound needle-punched felt is characterized in that base cloth is medium-alkali glass fiber cloth of which the hydrolysis resistance is good, and a face yarn is made by mixing non-alkali glass fiber and high-temperature resistant chemical fiber according to the proportion of 3 to 1 or 1 to 3. A water resisting agent and an electrostatic resisting agent are added into a chemical treating agent of the compound needle-punched felt. The manufacturing method comprises the following 10 steps of preparing the base cloth, preparing the face yarn, combing the face yarn, paving a net, carrying out previous needle-punched operation, carrying out main needle-punched operation, carrying out chemical treatment, carrying out drying operation, carrying out hot-pressing calendering operation, sewing materials into bags, and packaging the materials to leave the factory. The using temperature of the needle-punched felt can be reduced to 80 DEG C, and can be 300 DEG C in a short time. The needle-punched felt has the advantages of dew condensing prevention and electrostatic prevention, and prolongs the service life of the needle-punched felt.

Description

The compound spiked felt of purifying industrial smoke and method for making thereof

(1) technical field: the compound spiked felt and the method for making thereof that the present invention relates to a kind of purifying industrial smoke, be used for industrial smoke and administer or capture industrial production powder products such as carbon black, dyestuff, agricultural chemicals, belong to industrial filtering material, especially the Nomex filtrate technical field of three-dimensional structure.

(2) background technology: at present, traditional filtering material has the glass Nomex both at home and abroad, the chemical fibre Nomex, stainless steel fibre etc., because glass fibre belongs to fragile material, it is wear-resisting and rupture strength is relatively poor, the product cracky, service life is short, and the fibers material resistance to elevated temperatures is poor, it is yielding to run into high temperature, serviceability is not good, it is 98114419.5 that the name that the inventor applied on October 28th, 1998 is called " multi-function glass fibre composite filter material and preparation method thereof " patent No., patent (its commodity brand be fluorine beautiful this), its content is: with the alkali-free cloth is base cloth and based on alkali-free glass fibre, adds the veil that aramid fiber or charcoal fiber are made, with the compound Nomex that becomes three-dimensional structure through acupuncture of base cloth and veil, carry out back processing then, arrangement, back processing is that Nomex is flooded in chemical treatments, then oven dry, make through hot-pressing processing again, its surface has the organic film of one deck, and characteristics are anti-200 °～300 ℃ high temperature, acid-alkali-corrosive-resisting, wear-resisting, long service life, organic film makes smooth surface, easy deashing, still, the improved place of needs is in use arranged, as the base cloth that alkali-free glass fibre is made, hydrophobicity is poor, easy dewfall in the middle lower-temperature atmosphere below 200 ℃, as filtering material, dewfall can form the dust caking, and sticking stifled Nomex eyelet does not play filtration, influence service life, in addition, have static in flue gas and the dust, adsorb dust easily, stop up the eyelet of Nomex, influence filter effect.

(3) summary of the invention: the present invention is directed to the weak point that correlation technique exists, on the basis of first patent, improved and innovated, prescription and technology that development makes new advances, 98114419.5 number patented product to be I type fluorine beautiful this, present patent application form product be II type fluorine beautiful this.

Of the present invention theing contents are as follows:

Nomex is made of veil and base cloth, draw point by needing machine, veil is thrust in the base cloth, veil and base cloth are linked together, become plain felt, then through chemical treatment, be calendared into felt, it is a kind of filtering material of three-dimensional structure, this is the application and No. 98114419.5 patent something in common, the application and No. 98114419.5 patent differences are above-mentioned base cloths, the alkali-free glass fiber cloth that last patent is used, what the application used is the good medium alkali fiber cloth of hydrolysis ability, and what the last patent of veil part was used is that alkali-free glass fibre is main, and adding aramid fiber or carbon fiber are compound, the application's veil is to be mixed and made into 3: 1 or 1: 3 with alkali-free glass fibre and high temperature resistant chemical fibre, the application's chemical treatments is different with the prescription of last patent and proportioning, and adds waterproofing agent and antistatic agent, has improved its waterproof and antistatic performance.

Three parts of more than forming product:

1. the medium-alkali glass fibre base cloth is with CC-2 * 3 * 2 * 18Z doubled yarn, is about to 180/ meter of the synthetic twist of two doubled yarns, twists with the fingers to Z (left-hand lay), and promptly 22tex/12 thigh yarn is made base cloth with this kind yarn, and thread count is 5 * 6/cm ²

2. the formulation weight of compound spiked felt veil is than as follows with composition:

A. glass fibre: high temperature resistant chemical fibre=3: 1 or

B. glass fibre: high temperature resistant chemical fibre=1: 3

High temperature resistant chemical fibre wherein is polyimide fiber (P84) or polyphenylene sulfide fibre (PPS) or Melamine fiber (BaSF) or polyacrylonitrile fibre (DT) or polytetrafluoroethylene fibre, more than high temperature resistant chemical fibre can form said ratio with one or more and alkali-free glass fibre.

3. the prescription of the used chemical treatments of the present invention is:

Polytetrafluoroethyldispersion dispersion 8-30%

Silicones (commercially available 743 types) 4-12%

Polyacrylic acid fat liquor 8-15%

Waterproofing agent (commercially available C type) 1-5%

Antistatic additive (commercially available SN) 2-3%

Silane coupler 0.8-1.6%

Water surplus

Be the processing step of invention below: referring to process chart (Fig. 1)

1. base cloth is placed and send on the feltwork curtain

2. prepare veil, in alkali-free glass fibre: the ratio of high temeperature chemistry fiber=3: 1 or 1: 3 is prepared, and glass fibre and high temperature resistant chemical fibre are cut into the long staple fiber of 5～7mm, mix in proportion, and beat pine through opener, further mix;

3. combing is supplied with carding machine by cotton feeder with the veil that mixes, and is carded to thickness uniform fibers net sheet by each fiber of carding machine;

4. lapping is routed to fiber mat on the base cloth by the lapping machine, again the fiber mat that lays on base cloth and the base cloth is sent into the thorn machine that gives together;

5. give acupuncture, veil and base cloth are tentatively linked together by giving acupuncture;

6. main acupuncture couples together veil and base cloth securely through twice master acupuncture, reaches desirable peel strength, makes plain felt;

7. chemical treatment is flooded plain felt with the chemical pretreatment solution of above-mentioned prescription and is carried out chemical treatment;

8. oven dry, the Nomex after the chemical treatment will be through oven dry, earlier 80 ℃～140 ℃ oven dry down; Bake at 180 ℃～230 ℃ again;

9. hot pressing calendering, with Nomex calendering on the pair roller hot press of oven dry, hot pressing temperature is 150 °～280 ℃, pressure 2.4～3.5mpa, linear velocity is 3～4m/ branch;

10. cutting bagging, pack, dispatch from the factory.

Owing to adopt above technical scheme, the present invention and last patent comparison serviceability temperature are reduced to 80 ℃～300 ℃ from 200 ℃～300 ℃, and because of adopting the medium-alkali glass fibre base cloth, anti-hydrolytic performance is good, waterproofing agent and antistatic agent have been added in the finishing agent, hydrophobicity performance is good, anti-condensation, antistatic performance is good, has prolonged the service life of Nomex, PO PE NT PTFE uses about 80 ℃ for a long time, base cloth selects for use neutral-alkaline cloth more reasonable, adopts high temperature resistant chemical fibre to mix with glass fibre and makes veil, different high temperature resistant chemical fibres and glass assembly, can make multiple product, different mixed with fibers veils not only can improve the outward appearance and the feel of Nomex, and can improve the ABRASION RESISTANCE of Nomex, fold resistance, corrosion-resistant, resistance to elevated temperatures, and the peel strength of veil and base cloth.

(4) description of drawings:

Fig. 1 is a process chart of the present invention

(5) specific embodiment:

The used machinery of the present invention is glass fibre factory and textile industry common apparatus, as wire drawing machine, weaving loom, opener, needing machine, dryer, hot press etc., can implement the present invention with reference to the inventor's No. 98114419.5 patents and the operating procedure of specification of the present invention.

Claims (5)

1. the compound spiked felt of a purifying industrial smoke is made of veil and base cloth; Have the diaphragm that one deck is made of polytetrafluoroethylene (PTFE), silicone oil, polypropylene acid fat on chemical treatments processing, Nomex surface, it is characterized in that: base cloth is the good medium alkali fiber cloth of anti-hydrolytic performance; Veil is to make with the mixed of 3: 1 or 1: 3 with alkali-free glass fibre and high temperature resistant chemical fibre; Waterproofing agent and antistatic agent have been added in the chemical treatments.

2. the compound spiked felt of purifying industrial smoke according to claim 1 is characterized in that described medium-alkali glass fibre base cloth, is to adopt that to be plied to specification be CC-2 * 3 * 2 * 180Z yarn, and being made into longitude and latitude is 5 * 6/cm ²Middle alkali Nomex base cloth.

3. according to the compound spiked felt of the described purifying industrial smoke of claim 1, it is characterized in that the weight proportion of described veil and composition are as follows:

A. glass fibre: high temperature resistant chemical fibre=3: 1 or

B. glass fibre: high temperature resistant chemical fibre=1: 3

Glass fibre wherein is an alkali-free glass fibre

High temperature resistant chemical fibre wherein, as polyimide fiber (P84) or polyphenylene sulfide fibre (PPS) or Melamine fiber (BaSF) or polyacrylonitrile fibre (DT) or polytetrafluoroethylene fibre, more than high temperature resistant chemical fibre can form said ratio with one or more and alkali-free glass fibre.

4. the compound spiked felt of purifying industrial smoke according to claim 1 is characterized in that the prescription of used chemical treatments is:

Polytetrafluoroethyldispersion dispersion 8-30%

Silicones 4-12%

Polyacrylic acid fat liquor 8-15%

Waterproofing agent 1-5%

Antistatic additive 2-3%

Silane coupler 0.8-1.6%

Water surplus

5. the method for making of the compound spiked felt of a purifying industrial smoke:

Its processing step is as follows:

1. base cloth is placed and send on the feltwork curtain

2. prepare veil, in alkali-free glass fibre: the ratio of high temeperature chemistry fiber=3: 1 or 1: 3 is prepared, and glass fibre and high temperature resistant chemical fibre are cut into the long staple fiber of 5～7mm, mix in proportion, and beat pine through opener, further mix;

3. combing is supplied with carding machine by cotton feeder with the veil that mixes, and by carding machine fiber is carded to thickness uniform fibers net sheet;

4. lapping is routed to fiber mat on the base cloth by the lapping machine, again the fiber mat that lays on base cloth and the base cloth is sent into the thorn machine that gives together;

5. give acupuncture, veil and base cloth are tentatively linked together by giving acupuncture;

6. main acupuncture couples together veil and base cloth securely through twice master acupuncture, reaches desirable peel strength, makes plain felt;

7. chemical treatment is flooded plain felt with the chemical pretreatment solution of above-mentioned prescription and is carried out chemical treatment;

8. oven dry, the Nomex after the chemical treatment will be through oven dry, earlier 80 ℃～140 ℃ oven dry down; Bake at 180 ℃～230 ℃ again;

9. hot pressing calendering, with Nomex calendering on the pair roller hot press of oven dry, hot pressing temperature is 150 ℃～280 ℃, pressure 2.4～3.5mpa, linear velocity is 3～4m/ branch;

10. cutting bagging, pack, dispatch from the factory.

Images