KR20190057173A - Corrugated air filter having an excellent shape stability and manufacturing method - Google Patents

Abstract

The present invention relates to a corrugated air filter having excellent shape stability. In order to obtain excellent shape stability even when a melt-blown nonwoven fabric is used, the corrugated air filter comprises: a corrugated shape valley laminate; and a liner laminate bonded to a bending point of the valley laminate. The valley laminate and the liner laminate are laminated on both surfaces of a spun-bonded nonwoven fabric with a melt-blown nonwoven fabric by a hot-melt adhesive. The valley laminate and the liner laminate are charged by a corona discharge.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a corrugated air filter having an excellent shape stability and manufacturing method,

The present invention relates to a colgate-like air filter having excellent shape stability, which is obtained by laminating a spunbond nonwoven fabric between meltblown nonwoven fabrics with a support to improve morphological stability of the colgate-like filter, and a manufacturing method thereof.

Air filters are used in general air conditioning systems used in homes and offices, industrial air conditioning systems such as air purification systems and clean rooms, and are used to collect fine particles suspended in the air. Depending on the particle size of the dust-collecting object, it is classified into three types of prefilter, neutral filter and high-performance filter, and they are used alone or in some cases in combination.

Prefilters are generally used for collecting particles with large diameters. Neutral filters are used for general air conditioning in office buildings and the like. High-performance filters include HEPA (High Efficiency Particulate Arrestor) filters and ULPA (Ultra Low Penetration Absolute) filters used in clean rooms and the like. ULPA filter is also called ultra high performance filter.

Clean rooms are essential for industries such as the semiconductor industry, pharmaceuticals, food and hospitals. In the case of a semiconductor or a display process, since the cleanliness of the line has a great influence on the yield of the product, high performance is required for an air filter used in a clean room.

The air filter is made of nonwoven fabric or glass fiber. In general, nonwoven fabrics are used for prefilters and neutral filters, and synthetic fibers and glass fibers of nonwoven fabrics are used for high performance filters (HEPA, ULPA). However, due to the recent environmental problems of glass fibers, meltblown nonwoven fabrics of synthetic fibers have been applied to high performance filters. Korean Patent No. 10-0731791 has been disclosed as a related document.

However, the meltblown nonwoven fabric to be applied to the above-mentioned prior art has a problem in that the shape stability after bending (corrugated processing) is poor because of the strong nature of returning to the original form without maintaining the processed form due to the flexible nature .

As a result, the contact area between the air and the filter is reduced, the efficiency of the filter is lowered, and the pressure loss is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a colgate-shaped air filter having excellent shape stability even by using a meltblown nonwoven fabric and a manufacturing method thereof.

Another object of the present invention is to provide an air filter having a corrugated shape, which is excellent in morphological stability and excellent in shape stability to improve dust collection efficiency.

In order to achieve the above object, according to the present invention, there is provided an air filter of a corrugated shape having excellent morphology stability, wherein a cologne-shaped bone laminate and a liner laminate adhered to the bending point of the bone laminate are stacked at an intersection, The laminate and the liner laminate are characterized in that a meltblown nonwoven fabric is laminated on both surfaces of a spunbonded nonwoven fabric by a hot-melt adhesive, and the bony laminate and the liner laminate are charged by a corona discharge.

The mass ratio of the spunbond nonwoven fabric and the meltblown nonwoven fabric is 7: 2.

Meanwhile, a method of manufacturing a corrugated air filter having excellent shape stability according to the present invention includes a step of applying an adhesive for applying a hot-melt binder to both surfaces of a spunbonded nonwoven fabric, a step of laminating a meltblown nonwoven fabric on both surfaces of the spunbonded nonwoven fabric, A drying step of drying the composite nonwoven fabric, a discharging nonwoven fabric manufacturing step of discharging the dried composite nonwoven fabric by corona discharging to produce a discharge nonwoven fabric, the discharging nonwoven fabric being corrugated to be processed into a bone laminated material Forming a corrugated structure by bonding the discharge nonwoven fabric to a bending point of the bone laminate to form a corrugated structure; forming a corrugated structure by laminating the corrugated structure on the corrugated structure; To produce a corrugated block Type and is characterized in that it comprises a cutting step of cutting the corrugated block the air flow path as formed by the corrugated shape in the corrugated blocks that inlet and outlet.

The mass ratio of the spunbond nonwoven fabric and the meltblown nonwoven fabric is 7: 2.

As described above, according to the present invention, the corrugated air filter having excellent shape stability according to the present invention and the manufacturing method thereof can be manufactured by using the laminated material supporting the meltblown nonwoven fabric as the sponge bonded nonwoven fabric as the base paper cloth and the liner cloth Thus, it is advantageous in that the shape stability of the filter can be maximized even if the filter is processed in a corrugated shape.

Further, since the laminated material in which the mat blown nonwoven fabric is laminated on both surfaces of the spunbonded nonwoven fabric is charged by the corona discharge, there is an advantage that the dust collecting property of the air filter can be improved.

1 is a front view and a partially enlarged view of an air filter according to the present invention.
2 is a flowchart of an air filter manufacturing method according to the present invention.

Hereinafter, the technical idea of the present invention will be described more specifically with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the technical concept of the present invention, are incorporated in and constitute a part of the specification, and are not intended to limit the scope of the present invention.

First, in the present invention, a corrugated shape refers to a shape in which a zigzag bent shape is folded over a predetermined width.

1 is a front view and a partially enlarged view of an air filter according to the present invention.

As shown in FIG. 1, in a corrugated air filter having excellent shape stability according to the present invention, a bony laminated material 100 and a liner laminated material 200 are stacked at an intersection.

The bony laminated material 100 is in a zigzag form in a corrugated shape. At this time, a flow path that can flow in and out from both sides of the bone laminate 100 is formed by the corrugated shape.

The liner laminated material 200 is bonded to the bending point of the bone laminate material 100. That is, the liner laminate material 200 is adhered to the floor of the bone laminate material 100. This liner laminate material 200 is for supporting the bone laminate material 100 so that the shape of the corrugated structure of the bone laminate material 100 can be maintained for a long period of time. That is, the liner laminate 200 supports the bone laminate 100 and improves the morphological stability of the filter.

1, the bone laminate material 100 and the liner laminate material 200 are arranged on both sides of the spunbonded nonwoven fabric 20, as viewed from the enlarged view of the bone laminate material 100 and the liner laminate material 200, And an emulsion-blown nonwoven fabric 10 are laminated. That is, the spunbonded nonwoven fabric 20 supports the meltblown nonwoven fabric 10.

Since the spun bond nonwoven fabric 20 has a tensile strength higher than that of the melt blown nonwoven fabric 10, the bone laminate material 100 using the spunbonded nonwoven fabric 20 as a support is improved in shape stability and impacted, It is possible to maintain the shape of the call gate even after passing through the opening. On the other hand, the melt blown nonwoven fabric 10 is a fabric produced by spinning a polymer resin through an orifice having a small diameter, and ultrafine by high-temperature and high-pressure air to laminate ultrafine fibers, Excellent adsorption performance.

Thus, the spunbonded nonwoven fabric 20 is used as a support, the meltblown nonwoven fabric 10 is adhered to both sides, and dust and fine dust are adsorbed in the meltblown nonwoven fabric 10, whereby the morphological stability In addition, shape stability can be improved.

At this time, the spunbond nonwoven fabric 20 and the melt blown nonwoven fabric 10 are laminated by a hot-melt adhesive, and it is preferable that the meltblown nonwoven fabric 10 is laminated by a spray bonding method.

Meanwhile, the meltblown nonwoven fabric 10 may be made of polyethylene, polypropylene, viscose rayon, polyethylene terephthalate, polybutylene terephthalate, nylon, polyphenylene sulfide, polycarbonate or polyester glycol alone or a mixed fiber thereof And the spunbonded nonwoven fabric 20 is preferably made of thermoplastic polymer fibers such as nylon, polyester, and propylene.

The melted blown nonwoven fabric 10 may further be coated with activated carbon and deodorant to improve dust collection efficiency and fine dust adsorption efficiency.

The mass ratio of the spunbonded nonwoven fabric 20 and the melt blown nonwoven fabric 10 laminated is preferably 7: 2. The mass ratio is a mass ratio of the spunbonded nonwoven fabric 20 most optimized for supporting the meltblown nonwoven fabric 10. If the mass of the spunbonded nonwoven fabric 20 is smaller than the mass ratio of the meltblown nonwoven fabric 10, The supporting force is weakened and it is difficult to maintain the shape stability of the filter. That is, the mass of the spunbonded nonwoven fabric 20 is reduced, and the force supporting the meltblown nonwoven fabric 10 is also weakened.

If the mass of the spunbonded nonwoven fabric 20 is larger than the mass ratio of the spunbonded nonwoven fabric 20, the shape stability of the filter is maintained, but the mass of the spunbonded nonwoven fabric 20 is increased. Therefore, the mass ratio of the spunbonded nonwoven fabric 20 and the melt blown nonwoven fabric 10 is preferably 7: 2.

The bone laminate material 100 and the liner laminate material 200 are charged by a corona discharge. This is to increase the charge amount of the bone laminate material 100 and the liner laminate material 200 to improve the dust collecting performance of the air filter. At this time, the corona discharge is preferably performed at an applied voltage of 10 to 100 kV.

2 is a flowchart showing a method for manufacturing an air filter according to the present invention.

As shown in FIG. 2, the method for manufacturing a corrugated air filter having excellent shape stability according to the present invention includes an adhesive applying step (S100), a laminated nonwoven fabric manufacturing step (S200), a drying step (S300) (S600), a liner bonding step (S700), a corrugated block manufacturing step (S800), and a cutting step (S900).

First, the adhesive applying step (S100) is a step of applying a hot-melt binder to both sides of the spunbonded nonwoven fabric. At this time, the hot melt binder acts as an adhesive and can be applied on both sides of the spunbond nonwoven fabric by a spray method. At this time, the spunbonded nonwoven fabric is used as a support to improve the morphological stability of the air filter, and the meltblown nonwoven fabric is adhered to both surfaces of the spunbonded nonwoven fabric to adsorb dust and fine dust.

In step (S200), the laminated nonwoven fabric is produced by laminating a meltblown nonwoven fabric on both sides of the spunbonded nonwoven fabric. This is to improve the morphological stability of the filter by preparing a laminated nonwoven fabric in which a spunbonded nonwoven fabric having excellent tensile strength is laminated between meltblown nonwoven fabrics.

At this time, the mass ratio of the laminated spunbond nonwoven fabric and meltblown nonwoven fabric is preferably 7: 2.

In the drying step (S300), the laminated nonwoven fabric is dried with hot air, whereby the hot melt binder remaining in the spunbond nonwoven fabric is dried.

The discharging nonwoven fabric manufacturing step (S400) is a step of charging the dried composite nonwoven fabric into a discharging nonwoven fabric. At this time, it is preferable to discharge the corrugated nonwoven fabric by a corona discharge and corona discharge at an applied voltage of 10 to 10 kV. When the discharge nonwoven fabric is charged, the charge imparting amount of the discharge nonwoven fabric is increased to improve the dust collecting performance. Accordingly, the air filter of the present invention has a merit that not only the shape stability but also the melt blown nonwoven fabric is used, and the air filter is charged to maximize the dust collecting efficiency.

The colgate processing step S500 is a step of corrugating the discharge nonwoven fabric. That is, the discharging nonwoven fabric is folded in a zigzag shape, and the folded discharging nonwoven fabric has a flow path formed on both sides by a corrugated shape. At this time, the corrugation can be performed by a bending roller or a corrugated roller.

(S600) in which a hot melt adhesive is applied to the bending point of the corrugated discharge nonwoven fabric, and a liner adhering step (S700) in which a discharge nonwoven fabric is adhered again to the bending point where the adhesive is applied to form a caulk gate structure ) Is performed.

Accordingly, the corrugated structure has a shape in which a discharge nonwoven fabric is adhered to one side of a zigzag bent shape, and the bonded discharge nonwoven fabric supports a corrugated discharge nonwoven fabric. Accordingly, the corrugated structure can be supported so that the corrugated shape is retained even if an impact is applied from the outside.

In this case, a cooling step (not shown) of the corrugated structure may be further performed, and the cooling step of the corrugated structure is a step of cooling the corrugated structure and blowing cool air. This hardens the hot melt adhesive and fixes the shape of the corrugated structure.

After a call gate block manufacturing step (S800) for manufacturing a call gate block by laminating the call gate structure is performed, a cutting step (S900) for cutting the call gate block is performed. At this time, it is preferable that the corrugated block is cut so that air is sucked and discharged through the flow path formed by the corrugated shape. That is, it is preferable that the shape shown in Fig. 1 is cut so as to be the frontal shape of the air filter.

The air filter of the corrugated shape having excellent shape stability manufactured by such a method is excellent in the dust collecting performance because fine dust is collected in the meltblown nonwoven fabric composed of fine fibers having excellent porosity and at the same time the meltblown non- The surface area of the surface is increased and the dust collection efficiency can be maximized.

In addition, since the spunbonded nonwoven fabric is laminated between the meltblown nonwoven fabrics by the support, it is possible to prevent the durability and the morphological stability from lowering due to the use of the meltblown nonwoven fabric.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100:
200: liner laminate
10: Melt blown nonwoven fabric
20: Spunbond nonwoven fabric

Claims (4)

A cologne-shaped bone laminate; And
And a liner laminated material adhered to the bending point of the bony laminated material are stacked at an intersection,
Wherein the bony laminate material and the liner laminate material are laminated on both sides of a spunbonded nonwoven fabric with a meltblown nonwoven fabric by a hot-melt adhesive,
Characterized in that the bony laminate material and the liner laminate material are charged by a corona discharge.
The method according to claim 1,
Wherein the mass ratio of the spunbond nonwoven fabric and the melt blown nonwoven fabric is 7: 2.
An adhesive applying step of applying a hot-melt binder to both sides of the spunbonded nonwoven fabric;
A laminate nonwoven fabric manufacturing step of laminating a meltblown nonwoven fabric on both sides of the spunbonded nonwoven fabric to produce a laminated nonwoven fabric;
Drying the composite nonwoven fabric;
Discharging the dried composite nonwoven fabric by corona discharge to produce a discharge nonwoven fabric;
A corrugating process for corrugating the discharge nonwoven fabric to form a bone laminate;
A bonding preparation step of applying a hot-melt adhesive to the bending point of the bone laminate;
A liner bonding step of bonding the discharge nonwoven fabric to the bending point of the bone laminate to form a corrugated structure;
A corrugated block manufacturing step of laminating the corrugated structure to produce a corrugated block; And
And a cutting step of cutting the corrugated block so that air is sucked and discharged through the flow path formed by the corrugated shape in the corrugated block.
The method of claim 3,
Wherein the mass ratio of the spunbond nonwoven fabric and the melt blown nonwoven fabric is 7: 2.

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