KR830000138B1 - Method for nuctralizing static electricity with mixed atmospheres - Google Patents

Abstract

A surface having positive and negative charges on it, is contacted with a mixt. of an atmos. sprayed with a positive static charge compsn. and an atmos. sprayed with a negative static charge compsn. to neutralise simultaneously the charges on the surface. Air, N2 or noble gases are pref. used as the atmosoheres or dodecylbenzyl triethyl ammonium chloride is used as the positive compsn. and water as the negative compsn. Static charges are neutralised in a predictable, controllable and reproducible manner. Relatively low cost, readily available compsn. can be used in conventional air-washer systems, e.g. in textile and paper processing plants.

Description

How to Neutralize Electrostatic Charges with Mixed Gases

The accompanying drawings are schematic diagrams of devices used in embodiments of the present invention.

The present invention relates to a method for simultaneously neutralizing the positive and negative charges on the surface. More specifically, the present invention relates to a method of simultaneously neutralizing an electrostatic charge by mixing a gas stream treated with a positive charge composition and an air stream treated with a negative charge composition and contacting the surface.

Electrostatic charges caused by friction between two different molecular structures pose a particularly serious problem in the textile industry, including fiber processes requiring friction between yarns and multivalued devices. Depending on the nature of the yarn, if positive or negative charges are generated, defects are often generated. Therefore, the development of a method for safely and economically handling positive and negative charges simultaneously is of great importance in the textile industry.

In the past, many attempts have been made to neutralize the electrostatic charge, but since it only removes the positive or negative charge, the positive and negative charges cannot be removed at the same time. The first method that has been used until now is a method using a corona discharge electrostatic device (Corona), a second method is to introduce these additives into the air cleaner in the fiber manufacturing equipment using chemical additives. Corona discharge devices, however, have the drawback that they do not generate long-lived charges on objects. In addition, most antistatic agents marketed for air cleaners can only solve half of the problems caused by the static electricity. In other words, they can neutralize either positive or negative charges, but not neutralize them all. Losing flexibility in that regard.

U.S. Patent Nos. 3,924,157 and 4,077,914 describe a method of dispersing a positive charge in an air stream by spraying an aqueous borax solution and a surfactant in the form of a gas stream. If this method could only neutralize both positive and negative static charges, this would be ideal. U.S. Patent Nos. 3,939,080 and 3,984,731 also describe the addition of dodecylbenzyl triethyl ammonium collite into an air scrubber that delivers an air stream to the space where static electricity is present. Only a short negative static charge can then be neutralized to a significant extent. In other words, dodecylbenzyl triethylammonium chloride also acts similarly to the mixture of borax and surfactant in terms of dissipating positive charges into the air stream.

In addition, various methods have been known for dissipating charge into the gaseous zone; All of these have their own specific limitations. For example, a method of only bringing a gas stream into contact with a jet of water can sufficiently dissipate the charge into the gas stream, but again only a negative charge can be dissipated.

Another method is to apply a high voltage to the water jet before bringing the water jet into contact with the gas stream. According to this method, electrical energy is required, and if the safety is not sufficiently ensured, the device must be stopped periodically. Because of its shortcomings, it cannot be a satisfactory way. Another method uses radioactive materials. According to this method, the radioactive material is expensive, safety in handling the radioactive material is not guaranteed, and an expensive protective wall must be provided, which is also not a satisfactory method.

For this reason, there is a need to develop a method capable of discharging both positive and negative static charges. This method will have to be carried out relatively inexpensively, and should be easily and easily performed without the use of expensive devices. This method should ideally be suitable for use in existing air scrubbers in textile manufacturing facilities.

Accordingly, the present invention is to satisfy the conventional necessity as described above by providing a method capable of simultaneously neutralizing the positive and negative static charges on the surface. The method of the present invention sprays an effective amount of a positive charge composition on the first gas field so that the negative charge on the surface in contact with the first gas field injected with the positive composition can be neutralized by the first gas field. And spraying an effective amount of the negative charge composition on the second gas field so that the positive charge on the surface in contact with the second gas field injected by the negative charge composition is neutralized by the second gas field, and spraying the first gas field. And a mixture of the injection-treated second gas zone to generate a mixed gas zone, and contacting the mixed gas zone to at least one surface having positive and negative charges to neutralize the positive and negative charges on the at least one surface simultaneously. do.

There are many advantages to the present invention. Most importantly, the positive and negative charges on the surface of the object can be removed at the same time. Also

The composition used in the present invention is inexpensive because it consists mostly of water. And other ingredients are readily available. In addition, it is easy to prepare a composition that only mixes the respective components. In addition, since the composition is used in a liquid state, it can be easily sprayed using a conventional air cleaner. The method of the present invention can also be used in the case of including both positive and negative charges of different sizes.

The present invention neutralizes electrostatic charges in a predictable, controllable and reproducible manner.

In the present invention, the first gas winding and the second gas winding are mixed to generate a mixed gas winding that can neutralize the positive and negative charges on the object at the same time. The first gas winding and the second gas winding may be the same component or different components. Air is generally used as the gas zone, but other components other than air may be used if the components of the gas zone react chemically with each other or with the positive or negative charge composition to be treated. That is, for example, an inert sieve may be used. Examples of typical inert gases are nitrogen and / or helium, neon, argon, krypton, xenon and the like. A gas sphere can be made of one component or a mixture of several components. The term "ammosphere" includes both gases or vapors. The gaseous zone may be in the state of a stream in which the positively charged composition or the negatively charged composition is to be injected.

The spraying operation in the present invention may be made using a known spraying device. Typical injectors include a spray column, a cyclone injector, a venturi air cleaner, a spray cleaner, and the like. The injector may use one nozzle or multiple nozzles in the form of a spray manifold. The invention is particularly useful for air scrubbers of the type used in textile mills.

The term "injection nozzle" in the present specification means a device for making a small droplet of the aqueous solution of the present invention. In general, the injection nozzle may be a pressure nozzle, a rotary nozzle, a gas spray nozzle, or the like. Spray nozzles used for air wetting, air cleaning, humidification, air cleaning and the like are well known in this respect.

The term “injection” refers to the process of dispersing a liquid in gas or vapor. The spraying process used in the present invention is intended to form small particles and suspensions or dispersions in the gas. Injecting a positively charged composition of a first gaseous effective amount, such as an air stream, into contact with an object having a negative charge neutralizes some or all of the negative charge of the object. However, in the present invention, after the first gas zone is mixed with the second gas zone to generate a mixed gas zone, the mixed gas zone is brought into contact with an object to neutralize both positive and negative charges.

The term “positive composition” herein refers to an aqueous solution to be injected into the first gaseous zone to neutralize the negative charge on the object. The term “effective amount” of the positively charged composition refers to the amount of positively charged composition necessary to neutralize the negative charge to a desired degree, and varies depending on the nature of the positively charged composition and the size of the surrounding negative charge. This amount can be determined by minimal experimentation.

As used herein, the term “consisting essentially of (containing)” requires certain ingredients, but does not impair the basic and novel features of the present invention and so long as it does not interfere with the advantages of the present invention. It is used in the general sense that other conditions or substances may be included.

The present invention is generally carried out using positively charged compositions. Many such compositions are known. Suitable positively charged compositions essentially contain an aqueous solution comprising about 500 to about 3000 ppm of the composition essentially containing borax and at least one surfactant of (a) (b) (c).

(a) Nonionic surfactant whose HLB value is 6.6.

(b) Nonionic surfactant whose HLB value is 3.0.

(c) Liquid nonionic fatty acid alkylolamides.

Borax and surfactant are present in an aqueous solution at a weight ratio of 1.2: 1 to 1.5: 1. The first gaseous zone is typically in contact with the aqueous solution at a temperature between 15 ° C. and the boiling point of the aqueous solution for 0.1-10 seconds.

The time that the aqueous solution of borax and surfactant contact the first gaseous zone determines the amount of negative charge that can be neutralized. The longer the contact time, the greater the amount of negative charge that can be neutralized.

In the present specification, "borax" refers to sodium borate and its various hydrates. Typical sodium borate hydrates are pentahydrates: metaborate, metaborate tetrahydrate, tetraborate, tetraborate pentahydrate, perborate and their hydrates. Borax can be used either commercially or professionally. In addition, the term "HLB value" as used herein is a conventional meaning indicating the hydrophilic-lipophilic balance of a surfactant. This value is a measure of the size and strength of the hydrophilic and lipophilic groups of the surfactant. Another suitable positively charged composition essentially contains an aqueous solution composed of at least one quaternary ammonium compound having the structure:

The R groups in formula (I) may be the same or different. Typically, the concentration of quaternary ammonium compound in aqueous solution is 0.5-20 ppm.

In one example of the present invention, each R group has the same carbon atom of the resin and is selected from substituted or unsubstituted C ₃ -C ₈ aliphatic reactors. The quaternary ammonium compound is dissolved at least 0.5 ppm in water at about 20 ° C. If the R group contains too many carbon atoms, the solubility of this quaternary ammonium compound is reduced. In this case, after dissolving the quaternary ammonium compound using a cosolvent that can be mixed with water, the solution is dissolved in water to form an aqueous solution of the quaternary ammonium compound. Aliphatic reactors may be linear or branched chain, although aliphatic reactors may be stereoisomers. This aliphatic reactor is preferably an alkyl group because the quaternary ammonium compound containing the alkyl group has a quick adaptability. Typical examples are tetrabutyl ammonium chloride and tetrabutyl ammonium bromide, with the latter being particularly suitable in the present invention.

The aliphatic reactor may be an unsaturated form, for example an unsaturated group in the ethylene form, in which case the solubility of the quaternary ammonium compound in water is improved.

In another example of the invention, each R group has the same number of carbon atoms and is selected from substituted or unsubstituted C ₃ -C ₈ cyclic reactors. Typical such reactors include cycloaliphatic reactors such as cyclobutyl and cyclohexyl groups, cycloalkenyl groups such as cyclohexene and cyclohexadiene groups, and aromatic groups such as phenyl or benzyl groups.

In another example of the present invention, the R groups are different from each other.

In detail this, one or two R groups are selected from substituted or unsubstituted C ₈ -C ₁₀ aliphatic or cyclic reactors, and the remaining R groups are individually from substituted or unsubstituted C ₁ or C ₂ groups. Is selected. Again, it can be chosen from a wide range of linear or branched, saturated or unsaturated aliphatic reactors. The aliphatic reactor is preferably an alkyl group, but may also be in an unsaturated form such as, for example, an unsaturated group in ethylene form. When at least one R group is cyclic it is typically cycloalkyl, cycloalkenyl or aromatic, respectively.

Typical compounds in this range are n-alkyl benzyl ammonium halides (eg chloride and bromide). Preferred compounds belonging to this group are mixtures of n-alkyl dimethylbenzyl ammonium chloride and n-alkyl dimethylethylbenzyl ammonium chloride, wherein the n-alkyl group is a mixture of C ₁₂ -C ₁₈ alkyl groups.

Especially preferred compounds containing a group of dimethyl ammonium chloride n- alkyl is of from about 60 wt% C ₁₄ groups, about 30% by weight of C _l6 group, of about 5% by weight of C _l2 group, and about 5% by weight of C _l8 mixture, and dimethyl ethyl benzyl ammonium chloride, n- alkyl is of about 50% by weight of C _l2 group, about 30% by weight of C _l4 group, of about 17% by weight of C _l6 group, and about 3% by weight of C _l8 λ It is a mixture containing. Such compounds are commercially available from Lonza, Inc. under the trade name BARQUAT 4280Z.

The n value in the structural formula (I) is 1,2 or 3. This value is generally determined by the valence of the anion X, wherein the anion X may be any inorganic anion as long as the quaternary ammonium compound is dissolved in water at least about 0.5 ppm at about 20 ° C. Suitable inorganic anions include halides such as F, Cl, Br, and I, sulfates, nitrates, and phosphates. Gramic chloride and bromide are preferred.

The R group may be substituted with a hydrocarbon. For example, the R group may be aralkyl or alkaryl. Although the R group in structural formula (I) is preferably a hydrocarbon, one or more R groups may be substituted. For example one or more R groups are Cl, F, Br, I, OH, NO ₂ , HSO ₃ , -NH ₂ , -NH = group, or COOH-, CHC-,

C≡N 및 -CNH₂기와 같은 유기관능기 중 적어도 한 증류 이상과 치환될수 있다. R기를 치환시킬 경우에는 치환기가 주로 소수성을 나타내는 것이 좋다.

It may be substituted with at least one distillation of organic functional groups such as C≡N and -CNH ₂ groups. When substituting R group, it is good that a substituent mainly shows hydrophobicity.

The amount of quaternary ammonium compound of general formula (I) in the aqueous solution to be injected into the first gas atmosphere is about 0.5 to 20 ppm.

Another example of a positive charge composition is an aqueous solution of dodecylbenzyl triethyl ammonium chloride described in US Pat. No. 3,939,080.

Another process of the present invention is to spray the effective amount of the negative charge composition into the second gas winding to contact the negative charge composition with the second gas winding. When an object having a positive charge on the surface comes into contact with the second gas winding treated as described above, all or part of the positive charge is neutralized. However, in the present invention, after mixing the second gas winding with the first gas winding to generate a mixed gas winding, the mixed gas winding is brought into contact with an object to neutralize both positive and negative charges.

The term "negative charge composition" herein refers to an aqueous solution to be injected into the second gas atmosphere to neutralize the positive charge on the object. The term “effective amount” of a negatively charged composition refers to the amount of negatively charged composition necessary to neutralize the desired amount of positive charge, and varies depending on the nature of the negatively charged composition and the size of the positive charges in the surroundings. This amount can be determined by minimal experimentation.

In a similar manner to the positively charged composition, the present invention is carried out using negatively charged compositions. Various mixtures are suitable, but the simplest and cheapest is tap water (see Examples 1 and 5).

Another example suitable as a negative charge composition is an aqueous solution which essentially contains at least one surfactant other than the quaternary ammonium compound of formula (I). The surface tension of water to air at 20 ° C. is 72.75 dyn / cm, and the air of the aqueous surfactant solution is used when the concentration of the surfactant used in the present invention is about 0.0005 to about 0.1% by weight of the surfactant in the surfactant solution dissolved in water. The surface tension for is about 38-60 dyn / cm at 20 ° C.

Typical surfactants that can be used in the present invention are pleoxyitylene compounds wherein both ends of the molecule have been treated with a hydrophilic polyoxyethylenylene group. They can be represented by the following simple structure.

An example of such a surfactant is Pluronic L-62-LF, which is a condensate of ethylene oxide with a hydrogenous base produced by condensing propylene oxide with propylene glycol. The surfactant is nonionic and has an HLB value of 6.6 and is liquid even at a concentration of 100 percent.

Other surfactants suitable for use in the present invention include nonionic surfactants having an HLB value of 3.0. Commercially available surfactants of this type are, for example, Pluronic L-61, which has a similar chemical structure to Pluronic L-62-LF. Pluronic L-61 is a liquid having a total average molecular weight of about 1950, and an average molecular weight of the polyoxyprenylene base of about 1750. Pluronic L-62-LF is a liquid having an average molecular weight of 2200, of which the average molecular weight of the boloxyoxy base is about 1750. Pluronic L-61 and Pluronic L-62-LF can be purchased from Wyandotte Chemical Corporation.

Another surfactant suitable for the present invention is anionic sulfonate. Commercially available surfactants in this form include, for example, petro 22, which is sodium methyl naphthalene sulfonate manufactured by Petre Chemical Com-pany, Inc.

Other useful surfactants are caprylic dicarboxylate imidylzoline derivatives. One such surfactant is Cycloteric MV-SF, which is an amphoteric surfactant developed by Cyclo Chemicals Corp.

Other useful surfactants include modified oxyethylated, such as plurafac RA-10, a nonionic surfactant developed by BASF Wyan-dotte Industrials Chemicals Group. There are straight chain alcohols.

Particularly preferred surfactants for use in the present invention are mixtures of cycloteric MV-SF and Fulapak RA-10 in a weight ratio of 3: 2.

The amount of surfactant used is about 0.5-50 ppm.

The injected first gas winding and the injected second gas winding are mixed to form a mixed gas winding. When this mixed gas is in contact with a positively and negatively charged object, the amount of electrostatic charge is considerably reduced and may be completely neutralized.

It is also possible to simultaneously neutralize the positive and negative charges on the object. This is particularly advantageous in the textile industry, where both positive and negative charges occur during the process.

Another feature of the present invention is that even when the magnitudes of the positive and negative charges are different, it is possible to neutralize them all by using a mixed gaseous zone. The positive charge composition neutralizes the negative charge in the object and the negative charge composition neutralizes the positive charge in the object, so if the amount of negative charge neutralizes more objects than the positive charge, the proportion of the positive charge composition is proportionately greater than the amount of the negative charge composition. Just do it. Conversely, when the object has more positive charge, the negative charge composition is used in a larger amount than the positive charge composition. The charge, amount and shape of the object can be predicted using triboelectric Stories as is known.

The results obtained according to the invention are really surprising. In the case where two gas zones are mixed, the mixed gas zone formed will be in one of three cases, having a positive charge, a negative charge, or no charge. It was expected that only negative or positive charges could be neutralized, and that if the net charge in the mixed gas zone was zero, no neutralization would occur. However, for some reason it is not known, the mixed gaseous zone made according to the method of the present invention can simultaneously neutralize both the positive and negative charges in the object;

Hereinafter, a method of carrying out the present invention will be described in detail with reference to the accompanying drawings.

In the embodiments to be described later, all quantities, ratios, percentages, and ratios are by weight unless otherwise indicated.

The accompanying drawings are explanatory views of two air cleaners used in the following embodiments. In the air cleaner A on the left side of the drawing, the air cleaning chamber 1 is formed of a glass tube 2 having a diameter 3 of about 6 inches and a total length of about 42 inches. There is an inlet 4 at the top of the glass tube 2 and an outlet 5 near the bottom 6 of the glass tube 2. Air is introduced through the inlet 4, which is about 21 inches away from the center of the outlet 5.

The container 7 is a plastic container of about 5 gallon capacity, containing the positively charged composition 8 sprayed into the glass tube 2. One end of the plastic tube (9) having an inner diameter of about 9 inches is immersed in the solution (8), and the other end is a pump for transferring the solution in the container (7) to the spray nozzle (12) through the plastic tube (11). It is connected with (10). The tube 11 is made of the same material as the tube 9.

The tube 5 is provided with a plastic loss preventing throttle 14, which removes entrained liquid from the spray liquid 27 in the tube 2. Near the opening 15 of the tube 5 is a stainless steel plate 16, which is square with a side length of 15 cm and is about 1/100 inch thick. The stainless steel plate 16 is suspended from styrofoam bricks 17 which are fixed by suitable means (not shown). The charge on the plate 16 is measured with an electrostatic probe 19 approximately 2-3 mm away from the surface of the plate 16 using a Keithley model 600B electrometer 18. Electrometer 18 is also isolated from the surroundings by styrofoam bricks 17 '.

The charge is charged to the stainless steel plate 16 by a 1000 volt power supply 20 having positive and negative terminals. Charging is performed by contacting the stainless steel plate 16 with the probe 21 connected to the power supply 20 by the wire 22. The power supply 20 is also isolated from the surroundings by styrofoam bricks 17 ＂.

As shown, a positive charge is charged on the plate 16. This electrical device is grounded to the water pipe to minimize the effects of stray current.

In operation, the system is activated by starting the pump 10, which recycles the aqueous solution 8 in the vessel 7 to the spray nozzle 12. The gaseous zone to which the solution is to be injected is preferably a laminar flow. Since the outlet 6 of the tube 2 is immersed in the aqueous solution 8, the air introduced into the inlet 4 of the tube 2 is discharged only through the tube 5. Air flows through the pipe 1 and the pipe 5 by the Venturi effect generated at the nozzle 12.

In the following examples, the vessel 7 was charged with the aqueous solution mentioned in each example and the pump 10 was started. The plate 16 was first grasped and grounded so that the origin of the needle 18 was positioned at the center. The power supply 20 was used to charge the plate 16 positively or negatively as desired (up to 1000 volts). 5 on the scale means maximum potential. The change in the scale of the electrometer 18 was measured at 60 seconds or so, and the scale was recorded at intervals of 10 seconds. These measurement results indicate the rate at which the charge on the plate 16 is discharged. After each 60 seconds of operation, the plate 16 was grounded to control the drift of the meter, and this value was recorded as the ground value.

In each case, the temperature of the solution injected into the air stream was about 21 ° C. unless otherwise specified. The water used in all examples is tap water supplied from East Point City, Georgia, USA.

Example 1 (using one air scrubber and tap water)

This example is a comparative example using tap water in one air scrubber.

Only tap water was injected into the container 7, and the plate 16 was alternately charged with positive and negative charges. As a result, the following potentiometer scales were obtained.

From these results, it can be seen that when the tap water is sprayed, the positive charge on the plate 16 disappears faster than the negative charge by acting as a negatively charged plastic product. In fact, spraying tap water alone is inefficient for neutralizing negative charges for a short time.

Example 2 (one bear scrubber and water + quaternary ammonium compound)

This example was also a comparative example, in which Example 1 was repeated except that an aqueous solution containing 1 ppm of tetrabutyl ammonium bromide (T BAB) was injected into the container. The following is the measurement result.

TBAB is the opposite of tap water alone. That is, the TBAB aqueous solution neutralizes the plate negative charge faster than the positive charge.

Example 3 (1 Air Scrubber and Water + Surfactant)

This example was also repeated, except that Example 1 was repeated except that an aqueous solution containing 1 ppm of Pluronic L-62-LF was injected into the container. the results are as follow

This example shows that surfactants can accelerate the rate of discharge of positive charges more than tap water alone. After 60 seconds, the plate was slightly negatively charged, which may be the result of the plate drawing excess charge from the air stream. This effect lasted until the concentration of the surfactant was about 6-8 ppm, and the action of the solution at about 8 ppm was very similar to that of tap water alone. This means that even if the neutralization capacity of the positive charge is retained, the discharge rate is not as large as the low concentration surfactant.

Moreover, as the amount of surfactant increases, the action of the processing airflow on the negatively charged plate hardly changes, while the ability of the processing airflow to discharge the positively charged plate decreases. The results of the L-62-LF aqueous solution with the concentrations of 40 ppm and 80 ppm are as follows.

Example 4 (using two air correctors)

This embodiment is an embodiment of the present invention using two gas zones. This embodiment is carried out using the air cleaner B on the right side of the drawing together with the air cleaner A.

The air cleaner B is the same as the air cleaner A, but the aqueous solution 108 of the positive charge composition is charged in the container 107 of the air cleaner B. When the pump 110 is started, it draws the solution 108 through the tube 109 and discharges it in the form of a spray from the nozzle 112 through the tube 111. Air is introduced into the opening 104 by the Venturi effect generated by the nozzle 112.

After this air exits the air cleaning chamber 101 through the pipe 105, the entrained liquid is removed by the adjusting plate 114. The air stream thus treated exits the air scrubber B at the end 115 of the tube 105.

The process air stream from the outlet 115 of the air cleaner A is mixed with the process air stream from the outlet 115 of the air cleaner B in the space 126.

In this embodiment, tap water was used as the negative charge composition in the vessel 7, and 2 ppm tetrabutyl ammonium bromide (TBAB) was used as the positive charge composition in the vessel 107. The plate 16 was alternately charged with positive and negative charges as described above, and the electrometer scale at this time was as follows.

Although the gas streams from the air cleaner (A) and the air cleaner (B) were mixed to form a mixed gaseous zone, both positive and negative charges on the tube 16 could be neutralized. In general, it was expected that the two gas zones would neutralize each other and lose their charge or would have only positive or only negative charges, but in reality surprisingly neutralized both the positive and negative charges on the plate 16.

Example 5 (using only two air scrubbers tap water)

This example is a comparative example which is handed in the same manner as in Example 4 except that only the tap water is charged into the two vessels 7 and 107.

The result of having the plate 16 alternately charged with positive and negative charges is as follows.

In this embodiment, it can be seen that even if two air scrubbers are used, one plate scrubber cannot neutralize the negative charge on the plate unless the positive charge composition is used. In addition, according to this embodiment, it can be seen that the tap water acts the same as the negative charge composition as in Example 1. The positive charge discharge rate for Example 7 is much greater than for Example 1. This is supposed to be because in Example 5, the amount of airflow increased but the size of the plate 16 did not increase.

Although the present invention was carried out using two air cleaners in Example 4, two or more air cleaners may be used. In addition, in the present specification, the first and the second two gas zones have been described, but at least one gas zone is treated with a negative charge composition and the other at least one gas zone is treated with a positive charge composition, so that the charge in the mixed gas zone may be reduced. Two or more gas zones may be used in a manner that modulates the form (ie positive and / or negative charge) and amount. For example, when the plate-like negative charge is larger than the positive charge, the number of air streams treated with the positive charge composition may be made larger than the number of air streams treated with the negative charge composition. In addition, the positively charged compositions in each air stream need not all be the same. Likewise, the respective negative charge compositions do not have to be the same. In the practice of the present invention, the amounts of the positively charged composition and the negatively charged composition to be injected into the air stream can vary widely. The porcelain composition may be injected into the gaseous zone at a concentration up to the saturation point. Beyond the saturation point, the sprayed composition is not loaded into the airflow, which results in a bad phenomenon that the composition builds up on the surface of the object. Other additives may be added to these compositions unless they impair the electrostatic neutralization of the positive or negative charge composition You may try. Typical optional additives include antifoams, corrosion inhibitors, antioxidants, chelating agents, colorants such as dyes or pigments, buffers, lubricants, antibiotics, antibacterial agents, odor neutralizers, or small amounts of organic solvents.

Application to the industry of the present invention can be easily understood by those familiar with the electrostatic charge control aspect. In the textile and paper industries, a relatively large amount of unnecessary static charge is generated. The methods and compositions of the present invention can significantly or completely neutralize the positive and negative charges in such cases. The present invention can also be practiced as an air scrubber apparatus that has conventionally been used in textile or paper mills. Therefore, the present invention is particularly advantageous because it does not require expensive separate devices.

Claims (1)

The positive charge composition is sprayed on the first gas field by spraying an effective amount of the positive charge composition on the first gas field so that the negative charge on the surface that contacts the positively charged composition is not neutralized by the first gas field. And the negative charge composition is injected into the second gas field by spraying an effective amount of the negative charge composition on the second gas field so that the positive charge on the surface in contact with the second gas field where the negative charge composition is injected can be neutralized by the second gas field. Contacting the winding and mixing the first gas wound thus injected with the second gas wound thus injected to produce a mixed gas wound, which is brought into contact with at least one surface having a positive charge and a negative charge. A method of simultaneously increasing positive and negative electrostatic charges on a surface, comprising simultaneously neutralizing positive and negative charges on at least one surface.

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