KR20030032574A - A manufacturing method and a material of filtering inflow air for engine - Google Patents

Abstract

PURPOSE: Provided are a filter media for use of air purification in vehicles and a method for fabricating the same. CONSTITUTION: The method for fabricating filter media comprises the steps of preparing raw materials of an external media and an internal media; spinning the raw materials into hot air of 170-350°C through nozzles (a melt brown process); forming webs by collecting fibers spun during the second step using a drum or a conveyer; determining whether to input support material for improving hardness of the web; permanently electrifying the web if the support material is not inputted; and wounding the web.

Description

A filter for inflow air purification of internal combustion engine and its manufacturing method {A MANUFACTURING METHOD AND A MATERIAL OF FILTERING INFLOW AIR FOR ENGINE}

The present invention relates to an air filter media for filtering and purifying contaminants from air in the air. In particular, the present invention relates to a filter media for inflow air purification of an internal combustion engine, which can be used for a long time by extending the service life by a melt blown process. will be.

FILTER protects air from contaminants by collecting or filtering or blocking contaminants from contaminated air, commonly referred to as filters, classified into dry filtration and wet filtration according to the filtration method. .

As described above, the method of filtering, filtering or collecting contaminants from the air in the air is classified into a mechanical collection method and an electrostatic collection method, and the ambient temperature used is one of the important classification factors.

Hereinafter, an internal combustion engine inlet air purifying medium according to the prior art will be described with reference to the accompanying drawings.

It is attached to explain the prior art, Figure 1 is a collection conceptual diagram of a general mechanical filter, Figure 2 is a collection conceptual diagram of a general electrostatic filter, Figure 3 is a particle size vs. collection efficiency relationship for each filter collection method.

With reference to the accompanying Figure 1 will be described as an example of the method of collecting polluted particles in the atmosphere by mechanical collection.

The mechanical collection is divided into an inertial effect, a blocking effect, a diffusion effect and a gravity effect, and the inertia effect (INERTIAL EFFECT) will first be described with reference to FIG.

The air in the air contains various contaminants, and heavy contaminants among the contaminants do not flow in the direction of air generated around the media by the inertial force, and tend to go straight.

As described above, pollutant particles having a relatively heavy weight are collected by directly colliding with the media fibers by inertia.

The inertia effect increases as the flow rate and size of contaminants increase, and as the fiber diameter of the media decreases.

In addition, the blocking effect (INTERCEPTION EFFECT) as shown in B of Fig. 1, when the contaminant particles proceed in the flow direction of air, the media having a radius (R) larger than the radius (r) of the contaminant particles As it passes by the fibrous side of the particles, the small particles r are collected by hitting the fibers.

The blocking effect as described above is characterized in that the collection effect is increased as the size of the contaminant particles increases and the spacing between the fibers decreases as the size of the contaminants increases, when the flow pattern of the air does not change.

In addition, the diffusion effect by BROWN diffusion of particles as shown in FIG. 1C is due to BROWN MOTION, in which particles of less than 0.1 μm in air are thermal movements of molecules. Random diffusion occurs, and contaminating particles are collected on the fiber by the diffusion as described above.

In other words, contaminant particles are collected on the fibers due to the difference in concentration between the air stream and the fiber surface.

The diffusion effect as described above is characterized by the slower flow rate, the smaller the diameter of the particles, and the smaller the diameter of the fiber increases the effect.

GRAVITY EFFECT as shown in FIG. 1D is characterized by the fact that gravity acts on the contaminant due to the slow moving speed of the contaminant having a large diameter, and contaminates particles falling on the fiber by the gravity. The fibrous phase is to be collected.

The electrostatic (ELECTRET) collection method is shown in detail in FIG. 2, which collects contaminant particles by using static electricity, and typically, contaminants or particles suspended in air are electrically charged with a charge of + or-. And is strongly adsorbed and collected by the Coulomb force generated between the electrostatically treated media fibers.

Particles that are not charged among the particles suspended in the air generate dielectric polarization by the electric field formed by the media and are charged with + and-charges by the dielectric polarization, and thus are collected by the electrostatic filter media. do.

The electrostatic filter as described above exhibits high collection efficiency in contaminants having a larger particle diameter than mechanical collection filters and has a small temperature dependency. Generally, particles having a diameter ranging from 0.1 μm to 1 μm are generated by static electricity. It is easily collected on the fiber by the attraction force.

Such mechanical and electrical air purifiers generally capture fine contaminants having a particle size of several tens of micrometers from particles of 0.1 micrometer.

The filter used in the above air filter requires low pressure loss and high pollutant collection characteristics in the purification process, and the filter (FILTER) that satisfies the above characteristics is an electrostatic (ELECTRET) type collecting filter.

The attached FIG. 3 shows the correlation between the collection efficiency and the particle size by filtration of the mechanical method and the electrostatic filter medium, and it can be seen that the collection efficiency of the electrostatic filter medium is the best.

Referring to FIG. 3, when the diameter of the collected particles is 1 μm or more, there is almost no diffusing effect, mainly a blocking effect and an inertial effect, and the transmittance decreases as the particle size increases.

In addition, at low flow rates, the particles have sufficient time to diffuse on the fibrous surface of the media, but at high flow rates, the inertia effect plays a larger role and the blocking effect is independent of the flow rate.

As a filter medium that satisfies the above characteristics, a nonwoven fabric (NON WOVEN) is generally used.

Such a nonwoven fabric is a dry process of forming a web by forming a plurality of staple fibers, forming a web, and then dispersing a plurality of fibers in water smoothly and uniformly, followed by a belt screen ( Wet process (WET LAID), which extracts water by BELT SCREEN, removes water, and forms web (WEB) through a bonding process, and long fibers extracted from a plurality of holes (NOZZLE) are stretched by hot air. SPUN BOND process to form), an adhesive process to form a web (WEB) by bonding a plurality of fibers by an adhesive, a web where a plurality of fibers pass through a heated rotating cylinder or are joined by hot air Thermal bonding process to form WEB, NEEDLING process to form web by physically bonding a plurality of fibers by a plurality of needles, and a plurality of fibers to a high pressure water stream Combined by JET) There is a water flow process for forming a web (WEB).

In general, paper media has low pressure loss and high ventilation resistance. Therefore, wider filtration area can be used to lower the ventilation resistance. Nonwoven media have low ventilation resistance and low pressure loss, but have a low density. By forming a structure in which the filtration layer and the dense filtration layer are combined, there is a disadvantage that the initial filtration efficiency is relatively low.

Air passing through the filter medium for automobile internal combustion engines as described above removes contaminant particles of 1 micrometer (μm) or more up to 97.5% to 99%, and 98.5% to 99.9% of lifetime clean efficiency.

The manufacturing process of the above nonwoven fabric media, for example, raw material blending, carding, web pressing, needle punching (NEEDLE PUNCHING), resin bonding, hot air and drying with a can dryer, winding, bending / forming and Although it was somewhat complicated in order to attach the skeleton, it was partially improved in the order of raw material mixing, carding, web pressing, needle punching, hot air drying, and winding, and also in the order of raw material mixing, carding, web pressing, drying and drying. It was further improved.

The nonwoven fabric according to the prior art as described above has a problem that the manufacturing process is not only complicated, but also relatively expensive.

The present invention relates to a web or nonwoven fabric formed by the MELTBLOWN method using spun synthetic fibers such as polyester (PET), nylon (NYLON), polypropylene (PP), polybutyl terephthalate (PBT) and the like. It can be attached together by hot melt using ethyl vinyl acetate (EVA), nylon (NYLON), and polyester (PET), and by attaching other types of nonwoven fabric and paper filter paper, it is easy to form and recycle. The purpose of the present invention is to provide a filter and a manufacturing method for purifying inflow air of an internal combustion engine, which can be used for a long time and the manufacturing process is shortened and at a competitive price.

In order to achieve the above object, the present invention, the internal combustion engine inlet air purification media; 50 to 390 g / m ² weight is achieved by mixing 40% to 100% of a plurality of polypropylenes having different melt indices in the melt index in the range of 30 to 500, respectively, by meltblown spinning the fiber length to 2 to 102 millimeters. Being external; By mixing 60% to 100% of a plurality of polypropylenes having different melt indices in the melt index range of 60 to 900, respectively, the weight of 10 to 200 g / m ² is reduced by meltblown spinning the fiber length to 2 to 102 millimeters. Characterized in that it comprises a built-in.

In addition, the present invention in the manufacture of the filter medium for the inlet air purification of the internal combustion engine, the input process for inputting the external material and the raw material for the internal material, respectively; A melt blown process of radiating the injected raw materials into hot air in a range of 170 degrees to 350 degrees centigrade through a nozzle; Collecting the fibers spun in the process to a conveyor or a drum; A determination process of determining whether to insert a support material in order to increase the hardness of the collected media; and an electrostatic treatment process of permanently charging the fibers when the support material is not determined as judged in the process; It characterized in that it comprises a winding process for winding the web.

1 is a collection conceptual diagram of a general mechanical filter,

2 is a collection conceptual diagram of a typical electrostatic filter,

3 is a relationship between particles and efficiency of the collection method of the filter,

Figure 4 is a melt blown process conceptual view of the nonwoven media according to the present invention,

Figure 5 is a cross-sectional configuration state of the filter medium according to an embodiment of the present invention,

Figure 6 is a flow chart of nonwoven fabric manufacturing method according to the present invention,

Figure 7 is a comparison of the collection effect compared to the particle size, flow rate, density of the diffusion effect and inertial effect,

8 is a conceptual view of the collection of general media and electrostatic media.

** Explanation of symbols on the main parts of the drawing **

10: Hopper 20: Die

30: collector 40: electrostatic treatment unit

50: winding 70: external

80: internal 90: support material

Hereinafter, with reference to the accompanying drawings will be described a method of manufacturing the filter medium for automobile air purification according to the present invention.

4 is a melt blown process conceptual view of the nonwoven media according to the present invention, FIG. 5 is a cross-sectional configuration diagram of the media according to an example of the present invention, and FIG. Figure 7 is a flow chart of a nonwoven fabric manufacturing method according to Figure 7 is a comparison of the collection effect against the particle size, flow rate, density of the diffusion effect and inertial effect, Figure 8 is a conceptual diagram of the collection of the general media and electrostatic media.

As environmental problems such as improved performance of internal combustion engines and air pollution prevention are highlighted, it is necessary to clean the inflow air necessary for vaporizing fuel of internal combustion engines to be smoothly burned.

As the inlet air uses air in the air, and the air in the air contains a large amount of pollutants, when it is introduced into the internal combustion engine as it is, the vaporized fuel causes incomplete combustion to pollute the air again. At the same time, it shortens the life of internal combustion engines.

Separation or removal of unnecessary contaminants from the air as described above is called a filter or a filter or a collector (hereinafter referred to as a filter), as the filter medium for filtering contaminants, the price is relatively inexpensive and mass production, Many non-woven fabrics are easy to form and manage.

The performance of the internal combustion engine inlet air purification media, that is, the life of the engine is influenced by the degree of injecting clean air into the engine (ENGINE), which is an internal combustion engine, and the surrounding air pollution can be reduced.

Such media should be excellent in breathability and at the same time be able to exert an excellent filter performance against the particle size of contaminants and the density of contaminants.

The nonwoven fabric formation process by the MELTBLOWN process of the present invention will be described with reference to the accompanying FIG. 4, polypropylene (PP) or polyester (PET) or polybutyl terephthalate (PBT) or nylon (NYLON). ), The raw material consisting only of a material of one type is charged into the hopper 10, and the raw material charged into the hopper 10 is spun into fibers by the die portion 20.

The spun fibers range in diameter from 0.3 micrometers (μm) to 30 micrometers (μm).

As described above, the fibers continuously radiated from the die portion 20 are melted by hot hot air of 170 degrees to 350 degrees Celsius sprayed at an angle of 60 to 120 degrees from the side, and are 2 millimeters (mm) to 102 millimeters (mm) in length. The web WEB, that is, the nonwoven fabric NON WOVEN is formed by the collector 30 which consists of a drum DRUM or a conveyor.

The nonwoven fabric is an electrostatic treatment unit 40 composed of a positive (+) 10 to 100 kilovolts (KV), a negative (-) 10 to 100 kilovolts (KV), the bar (BAR) interval 3 to 10 centimeters (cm) environment By passing through) at a speed of 3 to 50 meters (m) per second, the fiber is subjected to a constant charge treatment, and the fiber is permanently charged, and the winding part for storing the finished nonwoven fabric as described above. Winding at 50.

Referring to FIG. 5, the configuration of the filter medium according to an embodiment of the present invention, the outer material 70 for primary filtering the contaminants by flowing air directly from the atmosphere,

It is formed integrally with the outer material 70, the inner material 80 for secondary filtration of fine contaminants from the air filtered by the outer material 70, and

It is formed integrally with the inner material 80, and further re-filter the air filtered by the inner material 80 to increase the moldability by adding a hardness (HARDNESS) to the outer material 70 and the inner material (80) It consists of a support body or support material (henceforth a support material) 90.

Referring to the filter medium manufacturing method according to the present invention with reference to the accompanying Figure 6, in the manufacture of the filter medium for inlet air purification of the internal combustion engine,

Input process (S10) for injecting the raw materials for the external material 70 and the internal material 80, respectively,

Melt-blowing process (S20) for spinning the injected raw material into a hot air in the range of 170 degrees to 350 degrees Celsius through a nozzle having an angle of 60 to 120 degrees, respectively,

A collecting step (S30) of collecting the fibers radiated in the step (S20) by a conveyor or a drum to form a web,

Judgment process (S40) for judging whether to put the support material 90 in order to increase the hardness (HARDNESS) of the collected media;

In the case where the support material 90 is not input as determined in the step S40, an electrostatic treatment step S50 for permanently charging the fibers,

In the case of inputting the support material 90 as determined in the determination process (S40), bonding is performed using one of impregnation (IMPREGNATION) method, melt blown spray (SPRAY) method, or hot melt web bonding method of hot melt. Hot melt process (S70) and

Heat treatment process (S80) and then proceed to the electrostatic treatment after hot air or press treatment at a temperature in the range of 70 degrees to 150 degrees Celsius, and

In the case of inputting the support material 90 is determined in the determination process (S40), and the ultrasonic process to proceed to the electrostatic treatment process (S50) after bonding using ultrasonic waves,

It comprises a winding process (S60) for winding the web (WEB) by the electrostatic treatment process (S50).

Referring to FIG. 7, the size of the contaminant particles, for example, about 1 micrometer (μm) or more, the diffusion effect is almost disappeared, it can be seen that the blocking effect and the inertial effect is important, low At the flow rate, the contaminant particles have sufficient time to diffuse on the fibrous surface, but at high speeds, the inertial effect plays a big role.

In addition, referring to Figure 3 attached in the prior art description, it can be seen that the filtration effect by the electrostatic action is able to collect even the very fine contaminated particles as compared to the diffusion effect and the inertial effect.

The attached Figure 8 shows the principle of collecting by the electrostatic non-static filter and the electrostatic filter, the general filter is inertial / blocking / diffusion / gravitational effect or fine contaminated particles that do not work Although passed between the fibers, the electrostatic media shows that even the finest contaminants are trapped by the attraction of static electricity.

As described above, the inlet air purifying medium is contained in the air, and cleans the internal combustion engine by collecting not only heavy and large particles but also particles of dust or contaminants in the range of 0.1 micrometer (μm) to 5 micrometers (μm). It allows air to flow in and keeps the filtration effect even after long use.

The filter medium including the support material 90 is made of recyclable polypropylene (PP), polyester (PET), polybutyl terephthalate (PBT) or nylon.

The filter media of the present invention as described above is composed of single layer nonwoven fibers having the same density gradient or two or more multilayered nonwoven fiber layers having different density gradients.

Each of the nonwoven fabrics includes a nonwoven fabric material formed by using a meltblown process and a support material 90 formed of short fibers or long fibers, and a breathable nonwoven fabric material that functions as a pre-filter. It is also configured by the combination with.

The media having a multi-layer structure as described above is formed by a melt blown process for spinning fibers having different compositions and thicknesses, and is obtained by combining two kinds of nonwoven fabrics having different tissue shapes.

As an example, an outer material 70 nonwoven layer having a diameter or thickness of fibers of 10 μm to 30 μm and an inner material 80 nonwoven layer having a thickness of 0.3 μm to 10 μm of fibers, that is, two layers having different tissue shapes At the same time the outer material of the combined nonwoven media 70 is to be 50 g / m ² to 390 g / m ² , the inner material 80 is 10 g / m ² to 200 g / m ² do.

As described above, 100% of polypropylene (PP) or polyester (PET) or polybutyl terephthalate (PBT) or nylon (NYLON) is used purely, and the nonwoven fabric of the web (WEB) formed by spinning in a melt blown process is used. In the case of joining in multiple layers, mutual bonding may be directly possible without using a separate adhesive, but hot melt using ethylene vinyl acetate (EVA) or nylon (NYLON) or polyester (PET) may be used. It can also be spun and bonded to the contact surface.

Polypropylene (PP) is suitable for the raw material of the nonwoven fabric by the melt-blown process, and when the hot air inside the engine is reused, such as a turbo engine, polyester (A) as a raw material of the inner material (80) of the media requiring heat resistance is required. PET) is suitable.

The polypropylene (PP) raw material resin is the physical properties of the spinning fibers melt-melted by MFR (MELT FLOW RATE) or MI (MELT INDEX) vary, for example, as the MFR is lowered The higher the hardness, the higher the MFR, the thinner and softer the fibers that are spun.

Therefore, by using polypropylene (PP) resins having different MFR (MI) as described above, the structure of the fiber to be spun can be adjusted to be thick or fine, and as in the conventional nonwoven fabric process, the process of blending various raw materials, There is no need to go through a carding process, a compaction roll for adjusting the density gradient and a drying process.

In particular, the melt-blowing process is a batch process for spinning fibers and forming nonwoven fabrics immediately, without the need for primary processing of raw material resins, and thus, the overall process is shortened and the production price is low.

When the non-woven fabrics having different gradients or different tissue shapes as described above are bonded or bonded to each other, raw materials having a low MI are easily bonded without using resin bonding, and raw materials having a high MI are made of hot melt resin. The coating amount is used in the range of 0.5 g / m ² to 6 g / m ² to enable recycling without pressure loss.

The hot melt resin can be applied by impregnation (IMPREGNATION), can be sprayed at the same time in a melt-blown manner (SPRAY), it may be used in the form of a web, but in the present invention when the non-woven fabric is formed by spraying at the same time Apply by spraying.

Even when the nonwoven layer of the web (WEB) formed by the melt-blown process and the spunbond process is mutually bonded as described above, ethylene vinyl acetate (EVA) or nylon (NYLON) or polyester (PET) is used as described above. Hot melt is applied by spraying or applying spray on hot surface.

As an example, a spunbond layer + a meltbub is a structure in which a nonwoven fabric formed of spinning fibers by a meltblown process and a nonwoven fabric formed of polypropylene (PP) spunbond (SPUNBOND) having a low MFR (MI) are mutually bonded to each other. There was one consisting of a low layer + a melt blown layer + a spunbond layer. Breathability and pressure loss (STIFFNESS) is not suitable for use as a filter medium, it is used for general industry.

In the conventional melt blown process, the formed nonwoven fabric is soft (SOFT), but has a high pressure loss (STIFFNESS), so it can be used only as a mask, a sorbent, a vacuum cleaner filter, an air conditioner filter, etc. It could not be used as a filter medium for spectacles.

As used in the melt blown process used to manufacture the nonwoven fabric of the present invention, an air lip (AIR LIP), which is a nozzle that outputs warm air or hot air in the range of 170 to 350 degrees Celsius, has a range of 60 to 120 degrees. When the angle of the nozzle is 60 degrees, the fibers to be spun tend to be long fibers, and the pressure loss of the finished nonwoven fabric is relatively high.

For example, in the air conditioning system of the automotive internal combustion engine, the air permeability of the filter media must be in the range of 20 cc / cm ² / sec to 130 cc / cm ² / sec, it is possible to capture dust particles that are contaminated particles.

Since the larger the angle of the air lip (AIR LIP) is short fiber, the pressure loss of the medium that is the finished nonwoven fabric is less.

In order to provide a ventilation of 20 cc / cm ² / sec to 130 cc / cm ² / sec suitable for the automotive air conditioning system as described above, the web (WEB) is formed by a collector 30 made of a conveyor or a drum It is necessary to pay attention to the process, the hardness (HARDNESS) of the web (WEB) is changed by the angle formed by the collector 30 by the conveyor or drum.

The polypropylene (PP) raw material resin is appropriate to use a raw material between MI 30 to MI 900, there may be a slight difference for each manufacturer.

In order to use the filter medium as a finished product of the filter to fit the narrow space of the engine room (ROOM) which is an internal combustion engine, an appropriate processing process is required, and a bending process is an example of the typical processing process.

The bending process as described above increases the filtration area, reduces the surface flow rate, maximizes the amount of dust collected as contaminants, and extends the use cycle and prevents noise inside the vehicle engine room.

It is possible to change the shape to solve the space problem caused by other design factors, and in order to bend as described above, the hardness of the media must be high.

However, in the present invention, the hardness of the fiber spun by the melt blown process can be strengthened by adjusting MFR or MI as described above.

When it is necessary to reinforce the hardness (HARDNESS) above the expected value, it is possible to use a separate support material 90, spunbond process in the case of using polypropylene (PP) as the support material 90 Using the web by WEB can increase the tear strength, and by using the polyester spunbond web, tensile strength and bendability can be improved.

In addition, the support material 90 may be a web, paper filter paper, or a highly breathable and high hardness mesh (MESH) or the like by a needle punching process or a heat fusion process.

There are many ways to combine the support material 90, but in the present invention, the hot melt (SPOT) method as described above, and the hot melt process is used to combine various types and types of nonwoven fabrics. In addition to being used, it is also used to combine paper media and nonwoven fabrics by melt blown processes.

The hot melt spray method is a method of melting a thermoplastic material and attaching the molten material by impregnating the molten material in a predetermined amount on a nonwoven fabric roll in a block unit, and forming a fine particle size in a perforated mesh (MESH) having a predetermined shape. After applying the material, it can take a variety of forms, such as a method of adhering with a heat roller, a method of melting the resin and spinning it with hot air in the same manner as in the melt blown process to apply the fine fibers to the WEB unit.

When the bendability is increased by using the support, a hot melt spray method is used to minimize the pressure loss.

In particular, the raw material of the hot melt used in the bending process as described above should be used to withstand the processing temperature generated in the bending process, when using polypropylene (PP) as the hot melt material temperature generated in the general bending process It is desirable to maintain the processing temperature in the lower 100 to 160 degrees Celsius range.

The filter medium, which is bent as described above, is externally processed by injection, urethane foam, iron plate, etc., and is manufactured as a media for inlet air purification of the final internal combustion engine.

The manufacturing example of the filter medium according to the present invention using the melt blown process as described above will be described in a diagram.

First embodiment:

Item Outside air inflow (external) Inside air inlet (internal) Raw materials PP MI 60 (40%) + MI 350 (60%) PP MI 350 (60%) + MI 900 (40%) Weight (g / m ² ) 100 80 Breathability (cc / cm ² / sec) 110 Electrostatic treatment environment of WEB; + 40 KV,-30 KV, distance between electrode bars, transmission speed 5 m / min

Second embodiment:

Item Outside air inflow (external) Air Inlet Medium (Internal) Inside air inlet (support material) Raw materials PP MI 60 (40%) + MI 350 (60%) PP MI 350 (60%) + MI 900 (40%) PP SPUNBOND (support) Weight (g / m2) 100 80 14 Breathability (cc / cm ² / sec) 110 If the PP SPUNBOND inside the engine inlet is mixed with the middle inlet of the engine inlet, the fiber layer will be bulkier, lower the pressure loss and prevent the MELTBLOWN fiber from coming off.

Third embodiment:

Item Outside air inflow (external) Air Inlet Medium (Internal) Inside air inlet (support material) Raw materials PP MI 60 (40%) + MI 350 (60%) PP MI 350 (60%) + MI 900 (40%) Paper filter paper Weight (g / m2) 60 40 100 Breathability (cc / cm ² / sec) 70 Filter media that combines paper filter paper and melt-blown media with hot melt spray inside the engine inlet; The coating amount of HOT MELT is suitable in the range of 0.5 to 6 g / m2, and the bonding force is increased after passing the hot air or hot press within a temperature of 70 to 150 degrees after HOT MELT SPRAY.

Fourth embodiment:

Item Outside air inflow (external) Air Inlet Medium (Internal) Inside air inlet (support material) Raw materials PP MI 60 (40%) + MI 350 (60%) PP MI 350 (60%) + MI 900 (40%) Paper filter paper Weight (g / m2) 60 40 100 Breathability (cc / cm ² / sec) 70 A filter medium which ultrasonically combines the paper filter paper inside the engine inlet, the middle layer and the meltblown filter material outside; The paper filter paper contains 5% or more of thermoplastic synthetic fibers by weight, and the use of a thermoplastic resin provides excellent ultrasonic adhesion.

Fifth Embodiment:

Item Outside air inflow (external) Inside air inlet (internal) Raw materials PP MI 60 (40%) + MI 350 (60%) PP MI 350 (60%) + MI 900 (40%) Weight (g / m ² ) 100 80 Breathability (cc / cm ² / sec) 110 No electrostatic treatment

Experimental results of evaluating the performance using the embodiment as described above are as follows.

Type of filter Initial Efficiency (%) Life Cleaning Efficiency (%) Dust collection amount (g / m ² ) NOTE FLOW RATE; 25.5 m3 / hr dust input; 0.5 g / min Tester filtration area 176.6 cm ² Pressure loss; Up to 400mmAQ First embodiment 98.2 98.9 520 Second embodiment 97.9 98.6 550 Third embodiment 98.1 99.2 298 Fourth embodiment 98.0 99.1 308 Fifth Embodiment 96.5 98.5 510 Non-woven 96.5 98.7 501 paper 97.6 98.9 110

As the dust particles used in the above experiment, AC-FINE (JIS 8 species), which is an automobile test standard dust, was used.

The initial efficiency measurement is a result of measuring the amount of dust caught in the absolute filter after the test (TEST) for the initial 6 minutes, the life-time cleaning efficiency is the result of measuring the pressure loss up to 400 mmAQ.

In summary, the present invention, polypropylene (PP). Using only one of polyester (PET) and polybutyl terephthalate (PBT) as a raw material, a nonwoven fabric of a web (WEB) formed by fiber spinning by a melt blown process is used as a filter medium.

The media is bonded by using a hot melt spray method or an ultrasonic process when the non-woven fabrics having different tissue shapes are bonded to each other or the supports are bonded to increase bending workability, increase collection efficiency of contaminant particles, and reduce pressure loss and aeration resistance.

Such a media is environmentally friendly because it can extend the service life by combining mechanical filter characteristics and electrostatic filter characteristics, thereby reducing waste generation and recycling the web of discarded filter media.

The present invention having the configuration described above has the effect of reducing the production cost by shortening the production process in manufacturing the filter medium for automobile air purification.

In addition, since the hot melt process or the ultrasonic process using the same series of resins in joining the non-woven fabrics of different tissue structure is used, there is an effect that can easily recycle the waste media.

In addition, by charging the filter medium to be collected by the static electricity, the performance is improved, there is an environmentally friendly effect of extending the service life.

Claims (10)

In the media for purifying the inlet air of an internal combustion engine, 50 to 390 g / m ² weight is achieved by mixing 40% to 100% of a plurality of polypropylenes having different melt indices in the melt index in the range of 30 to 500, respectively, by meltblown spinning the fiber length to 2 to 102 millimeters. With external appearance being, By mixing 60% to 100% of a plurality of polypropylenes having different melt indices in the melt index range of 60 to 900, respectively, the weight of 10 to 200 g / m ² is reduced by meltblown spinning the fiber length to 2 to 102 millimeters. Filter for purifying inflow air of an internal combustion engine, characterized in that the configuration consisting of the inner material. According to claim 1, The spinning fiber of the outer material is 10 to 30 micrometers in diameter, Intrinsic spun fibers have a diameter of 0.3 to 10 micrometers, The media for the internal combustion engine inlet air purification, characterized in that the total weight of the filter medium is 50 g / m ² to 400 g / m ² . According to claim 1, The polypropylene is used as a support material among webs having a weight of 10 to 100 g / m ² by a spunbond process, a drylaid process, a thermal fusion process, and a needle punching process, or thermoplastic synthetic fibers are included and thermoplastic The filter medium for impregnating air in an internal combustion engine, characterized in that the resin is impregnated and has a weight of 50 to 200 g / m ² as a support material and mixed to bond with internal materials. According to claim 1, An internal combustion engine inlet air purification medium, characterized in that one of polyester, polybutyl terephthalate or nylon is used instead of the polypropylene. According to claim 1, In the case of bonding each layer of the media, one of ethylene vinyl acetate, nylon and polyester is adhered by a hot melt spray applied in the range of 0.5 to 6 g / m ² or by ultrasonic treatment, and the air permeability is 20 Filter medium for inlet air purification of the internal combustion engine, characterized in that from 130 cc / cm ² / sec. The method of claim 1, wherein the media is, It can be formed in a single layer, plus 10 to 100 kilovolts, minus 10 to 100 kilovolts, bar interval 3 to 10 centimeters, electrostatic treatment of the internal combustion engine inlet air, characterized in that the electrostatic treatment by the transmission speed environment 5 to 50 meters per second Media. According to claim 1, The outer material uses 100% polypropylene having the same melt index, The inner material, the internal combustion engine inlet air purification media, characterized in that the bonding by heat treatment with one of the breathable sheet or mesh capable of heat fusion as a support material. In the manufacture of media for purifying the inlet air of an internal combustion engine, An input process for inputting external and internal raw materials, The injected raw material is melt-blown process of spinning through the nozzle into the hot air of 170 degrees to 350 degrees Celsius, respectively, A collecting process of collecting the fibers radiated in the process by a conveyor or a drum to form a web; Judgment process for determining whether to support the material in order to increase the hardness of the collected media, In the case of not judging the support material judged in the above process, the electrostatic treatment process for permanently charging the fiber, A method for manufacturing an inlet air purification media for internal combustion engines, characterized in that it comprises a winding process for winding up the web. The method of claim 8, In the case of judging the support material in the determination process, the hot melt process of bonding using either hot melt impregnation method, melt blown spray simultaneous spinning method or hot melt web bonding method, After the hot air or press treatment of the web by the process at a temperature in the range of 70 degrees to 150 degrees Celsius, the heat treatment process proceeds to the electrostatic treatment process further comprising the filter material for the internal air engine inlet air purification. The method of claim 9, In the case of inputting the support material determined in the determination process, the manufacturing method of the filter medium for the internal air engine inlet air purification, characterized in that it further comprises an ultrasonic process for bonding using ultrasonic waves and proceeds to the electrostatic treatment process.