JP3531659B2 - Cut filter material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-performance cut filter material which is cut into an arbitrary size and shape and is attached to a desired place to be used for air cleaning. Electronic devices and O
It is very convenient and suitable because it can be freely and easily used for filters such as openings of equipment A, ventilation holes, and air cleaners.

[0002]

2. Description of the Related Art Filters attached to openings such as electronic equipment, office automation equipment, and air purifiers, ventilation holes, and ventilation openings are usually integrated with a frame in accordance with the shape and size of the mounting portion. Is assembled and attached to. Then, every time a predetermined period of time elapses or whenever clogging progresses, the frame is removed, washed with a neutral detergent and reused, or the frame is replaced with a new filter. A non-woven fabric, especially a polypropylene non-woven fabric, is usually used for the filter.

[0003]

The conventional filter is
Even if the required performance is not so different, there is the inconvenience and waste of having to use a frame-dedicated filter with a different shape depending on the equipment to be attached or the parts of the same equipment. there were. In order to solve such a problem, the present invention provides a high-performance product that can be easily attached without using a frame or the like, regardless of the shape and size of the mounting portion, appropriately cutting it according to the required size and shape. It provides a cut filter material.

[0004]

The present invention will be described with reference to FIG. FIG. 1 is a perspective view showing an example of an embodiment of the present invention in a state where a release paper is being removed. In order to achieve the above-mentioned object, the present invention has a grid in which an adhesive 2 is provided on one surface of an electret nonwoven fabric 1 made of synthetic fiber.
Provided is a cut filter material, which is applied in a striped pattern and has a release paper 3 adhered to the application surface side. Easy to use if you apply adhesive to the vertical and horizontal checkered patterns
And convenient. The surface charge density of the electret nonwoven fabric made of synthetic fiber is preferably at least 5 × 10 ⁻¹¹ coulomb / cm ² . The synthetic fibers constituting the electret non-woven fabric have a weight average diameter of 5
Polypropylene fibers not exceeding 0 μm can be preferably used. In addition, the weight per unit area is 10 for normal use.
It is preferable to use an electret nonwoven fabric of 200 g / m ² . The adhesive application area is 5 of the electret nonwoven fabric area.
The range of 70% is not preferred. Furthermore, it is convenient to cut the cut filter material to a desired size at a predetermined position by indicating a mark or a scale on the electret non-woven fabric and / or the release paper to indicate the application position of the adhesive. In addition, although air which is a main target is described in the following description, the present invention can be utilized for cleaning other gases.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The cut filter material of the present invention is
On the surface of the electret non-woven fabric 1 made of synthetic fiber that is permanently polarized in positive and negative directions and forms an electric field in the surroundings, lattices of vertical and horizontal directions are formed.
The adhesive 2 is applied in a striped pattern , and the release paper 3 is laminated and adhered on the application surface side. When used, the release paper 3 is cut according to the shape and size of the opening, and the release paper 3 is removed. It is used by adhering and fixing it to the periphery of the opening by covering the opening and the like.
It is the portion 4 to which the adhesive 2 is not applied that substantially exerts the filter action.

Polypropylene fiber is suitable for the fiber material constituting the electret nonwoven fabric used in the present invention, and the fiber thickness is in the range of 0.5 to 50 μm, not exceeding 30 μm, and particularly not exceeding 17 μm. Preferably, it can be generally produced by melt-blown spinning. Polypropylene fiber has chemical resistance,
It has a feature that it can easily be electret. Usually, when the weight per unit area of the non-woven fabric used is the same, the smaller the thickness of the fiber, the higher the collection efficiency of the cut filter material for fine particles, and the thicker the fiber, the smaller the pressure loss tends to be. For fibers of the same thickness, the greater the basis weight, the higher the collection efficiency, but the greater the pressure loss. An appropriate cut filter material may be selected depending on the purpose of use and the size of particles to be collected. However, the basis weight of the electret nonwoven fabric for general use in the range of 10 to 200 g / m ² is good, among them the range of 15 to 40 g / m ² is preferred.

The non-woven fabric can be formed by any suitable means, for example, Japanese Patent Laid-Open No.
It can be made into an electret by using the method described in JP-A 1-1024476 (Electret processing and sheet manufacturing method). In general, the more highly polarized structure is arranged in the thickness direction, the higher the collection efficiency of the filter. The surface charge density of the electretized non-woven fabric is
Levels of at least 5 × 10 ⁻¹¹ , preferably above 1 × 10 ⁻¹⁰ coulomb / cm ² .

The cut filter material of the present invention is adhered and fixed to a target attachment position via an adhesive. adhesive
Is applied in a vertical and horizontal grid pattern . There is no particular limitation on the coating method. The adhesive applied in a checkered pattern not only fixes the cut filter material to the mounting surface by adhesion, but also a seal that prevents air from leaking from the peripheral edge of the applied filter and impeding the filtering effect. Action is needed. If there is a cut on the adhesive surface at the periphery of the cut filter material, it may cause air leakage. Lattice glue
If it is applied in a striped pattern , the cut filter material is cut along the lattice stripes according to the shape of the surface to be pasted, and the adhesive application surface is continuous along the periphery of the cut cut filter material. Because it will be. On the contrary, if a cut filter material in which the adhesive is applied in, for example, spots or discontinuous lines is used, a non-adhesive portion is formed on the periphery of the cut filter, which causes a leak. It is convenient to cut and use if it is applied to the plaid.

In the case of applying in a grid pattern , according to the knowledge of the present inventor, the stripes to which the adhesive is applied have a width of about 2 to 10 mm, and the stripe pitch is several to 50 per 1 m length of the cut filter material. It is preferable that it is about this, that is, about several tens of cm to several cm, more specifically, those existing at a pitch of about 2 to 15 cm are easy to use.

As the adhesive, a tacky adhesive that adheres well to almost all substances and can be easily and efficiently worked is used. The release paper is adhered to the coated surface side until it is used. deep. The adhesive application area is preferably 5 to 70% of the nonwoven fabric area, and particularly preferably 15 to 30%. 7
If it is 0% or more, the filter area becomes small relative to the mounting area and the processing capacity is insufficient, and if it is 5% or less, the adhesion area may be small, resulting in insufficient adhesion. The cut filter material of the present invention may be formed in a plate shape or a roll shape of about 30 × 50 cm.

The application of the cut filter material of the present invention will be described with reference to examples. According to the shape of the part to be attached,
The adhesive-coated surface is continuously cut along the lattice stripes coated with the adhesive so as to surround the peripheral edge of the cut filter material. At that time, or if a cut filter material having a mark indicating the application position of the adhesive 2 on the electret non-woven fabric and / or the release paper, or a dimensional scale is used, along the portion where the adhesive is applied, Alternatively, it can be cut efficiently without fail according to the peripheral shape of the opening. A transparent release paper may be used for the same purpose. Remove the release paper before applying the cut filter material. When the gas flow direction is one-way, the cut filter material does not come off when it is attached on the upstream side of the mounting surface unless there is a special reason. Further, another attaching means such as sticking an adhesive tape on the peripheral adhesive surface may be used together. Further, in the case where the opening is large, or when the wind pressure is applied, it is preferable to attach a screen or the like to the opening in order to support the cut filter material to be attached.

[0012]

EFFECTS OF THE INVENTION Since the cut filter of the present invention is made of an electret nonwoven fabric made of thin synthetic fibers, it has a smaller basis weight, in other words, a smaller pressure loss or filtration than the conventional filter material. A high dustproof effect can be obtained in the area. Moreover, it is possible to easily cut and cut along the lattice stripes coated with the adhesive in accordance with the required size and shape, without being fixed to a special frame material, and easily attached and replaced. Since the periphery is surrounded by the adhesive application surface, gas leakage can be prevented. It is convenient and convenient to use a transparent release paper, or mark the scale 5 and the scale indicating the application position of the adhesive. Electronic equipment, O
It can be used easily and at low cost in a very wide range, such as equipment A, machines, openings of buildings, ventilation holes, air blowers, etc. It can be installed or replaced by any number of people without any special skill.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an embodiment of the present invention while a release paper is being removed.

[Explanation of symbols]

1: Electret non-woven fabric 2: Adhesive 3: Release paper 4: Substantially filter part 5: Marker showing the application position of the adhesive

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoru Kusatsu 3-3-3 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture Toray Industries, Inc. Osaka Plant (72) Masami Nakano 3-chome, Nakanoshima, Kita-ku, Osaka-shi, Osaka No.3-3 Toray Co., Ltd. Osaka Plant (56) References JP-A-61-102476 (JP, A) Fukukaihei 5-7318 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B01D 39/00-39/20

Claims (7)

(57) [Claims] 1. An adhesive (2) is applied to one surface of an electret nonwoven fabric (1) made of synthetic fiber in a vertical and horizontal lattice pattern , and a release paper (3) is adhered to the application surface side. Cut filter material characterized by. 2. The surface charge density of the electret nonwoven fabric made of synthetic fibers is at least 5 × 10 ⁻¹¹ Coulomb / cm ² or more.
Cut filter material described. 3. The electret nonwoven fabric has a weight average diameter of 5
The cut filter material according to claim 1 or 2, wherein the cut filter material is composed of polypropylene fibers having a diameter of not more than 0 µm. 4. The basis weight of the electret nonwoven fabric is 10 to 10.
200 g / m ^{2 5.}
The cut filter material described in any of 1. 5. The area where the adhesive is applied is 5 to 70% of the area of the electret non-woven fabric, wherein:
The cut filter material according to any one of 4 above. 6. The cut filter material according to any one of claims 1 to 5, wherein the electret nonwoven fabric and / or the release paper is marked with a mark indicating the application position of the adhesive. 7. A graduation is marked on the electret non-woven fabric and / or the release paper.
The cut filter material according to any one of to 6.