JPH0560513U - Electret filter media - Google Patents

Abstract

(57) [Summary] [Purpose] A supporting non-woven fabric to be bonded to an electretized non-woven fabric is subjected to a resin treatment with a resin mixed with a mildew proofing agent to have a deodorant sterilizing action. [Structure] An electretized non-woven fabric 2 and a resin-processed supporting non-woven fabric 3 are stacked with a fusing sheet 4 interposed therebetween, and heat-fused through a heating roll. An antifungal agent 6 is mixed in advance with the resin 5 to be processed. Therefore, the electret filter medium 1 prevents the captured dust organic matter from spoiling and propagating bacteria to give off a strange odor. Therefore, it is not necessary to duplicate the device for deodorant sterilization.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electret filter medium for capturing dust and other fine particles in the air.

[0002]

[Prior Art]

 Conventionally, it is known that a non-woven fabric is made into an electret in order to electrostatically capture dust, exhaust gas fine particles, pollen and other fine particles floating in the air. For example, those disclosed in JP-A-60-168510 or JP-A-61-95416. These electretized non-woven fabrics have a coarse mesh so that the fibers constituting them easily electrostatically adsorb dust and the like and reduce the pressure loss with respect to the flow of air, resulting in a uniform air flow. It is composed of low-density non-woven fabric. Therefore, it becomes a very soft sheet, for example, when it is used as a filter body folded and folded for an air filter, it cannot maintain its own shape only with the electretized nonwoven fabric and its strength is low. Therefore, as the electret filter medium for forming the filter body, an ordinary non-woven fabric is piled up to support the morphology.

[0003]

[Problems to be solved by the device]

 As described above, the conventional electret filter medium retains and accumulates the captured dust and the like, so that bacteria are propagated due to the decomposition of the organic matter in the dust and the like to generate an offensive odor. If such a filter medium is continuously used as an air filter, bacteria and the like will be carried away into the room, etc. on the downstream side, which will contaminate the air. Or it will bring a strange odor into the room. In order to prevent this, a filter for deodorization and sterilization must be provided on the downstream side of the air filter using the above electret filter medium to perform two-stage filtration.

[0004]

[Means for Solving the Problems]

 The electret filter medium of the present invention is obtained by applying resin processing to a supporting non-woven fabric with a resin containing a mildew-proofing agent, and stacking and joining the electret non-woven fabric.

[0005]

[Action]

 This type of electret filter media is used with the electretized non-woven fabric on the upstream side, but the supporting non-woven fabric on the downstream side holds a mildew-proofing agent, so that spoilage of accumulated dust etc. is suppressed, and fungi It also prevents nasty smells from being released downstream.

[0006]

【Example】

 FIG. 1 shows the construction of an electret filter medium 1 of this invention. The electret filter medium 1 is formed by stacking an electretized nonwoven fabric 2 and a supporting nonwoven fabric 3 with a fusing sheet 4 interposed therebetween and heat-sealing them with a heating roll (not shown) to bond them together.

The electretized non-woven fabric 2 is a non-woven fabric made of polypropylene fiber having a denier of 3 to 4 and having a basis weight of about 100 gr / m ² , and subjected to a known electretization treatment.

The supporting non-woven fabric 3 is made by forming rayon fibers of about 15 denier into a non-woven cloth having a basis weight of about 70 gr / m ² and resin-processed (impregnated) with an acrylic resin 5 having a weight of about 35%. Parachlorometaxylenol (PCMX) as a mildew-proofing agent 6 is previously mixed in this resin 5. In addition to this, an appropriate antifungal agent is selected.

The sheet 4 for fusing is made of a polyamide fiber of about 5 denier into a mesh sheet having a basis weight of about 10 gr / m ² and a melting point of about 90 ° C.

The electret filter medium 1 is formed by superposing the electretized non-woven fabric 2, the fusing sheet 4, and the supporting non-woven fabric 3 and passing them through a heating roll to heat-bond the three layers. It should be noted that it is not preferable to perform resin processing after heat-sealing the above three layers, because the effect of electretization is diminished.

The supporting non-woven fabric 3 can be made into a thin sheet with coarse eyes and sharp folds since it can be made to have a waist strength that allows it to retain its shape even if it has coarse eyes by resin processing. It is also possible to form a pleated filter with a fine pitch. Therefore, depending on the application, it is possible to select a filter with fine folds, or to select a non-woven fabric for support with a relatively fine or thick texture to increase the amount of antifungal agent. .

The electret filter medium 1 is used as a filter element 10 as shown in FIG. The electret filter medium 1 is fold-folded to form a filter body 11, which is attached and fixed to the inside of a rectangular frame-shaped end plate 12. On the outer periphery of the frame-shaped end plate 12, a synthetic resin packing 13 having elasticity, such as one made porous by foam molding, is attached to form the filter element 10.

The filter element 10 is attached to a rectangular mounting frame (not shown) to form an air filter, and air is introduced from the electretized nonwoven fabric 2 side to remove dust and the like. This air filter has a square shape and an appropriate shape, for example, is attached to the outside air intake of a vehicle air conditioner and is used for other indoor air purifiers.

[0014]

[Effect of the device]

 In the electret filter medium of the present invention, since the anti-mold agent is held in the supporting non-woven fabric, the captured dust and the like are prevented from spoiling and bacteria are propagated and the offensive odor is generated. This prevents the downstream air from being polluted by the action of. Further, it is not necessary to separately provide a filter for deodorant sterilization for that purpose.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of an embodiment.

FIG. 2 is a perspective view of a filter element using the filter medium of the embodiment.

[Explanation of symbols]

 2 Electretized non-woven fabric 3 Supporting non-woven fabric 5 Resin 6 Antifungal agent

Claims (1)

[Scope of utility model registration request] 1. An electret filter medium in which an electretized non-woven fabric and a supporting non-woven fabric resin-treated with a resin mixed with a mildew-proofing agent are superposed and joined.