JP3623375B2 - filter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filter suitable for filtering sink wastewater and the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a filter that is used by being set in a drainage hole of a sink and is made of a water-permeable sheet such as a net or a coarse nonwoven fabric is well known.
[0003]
[Problems to be solved by the invention]
Since the size of the soot treated with waste water in a household sink is not constant, depending on the filter used, something shortly after use is clogged with a small soot and must be replaced immediately or Even if traps can be collected, small traps may flow out, and the effect of using a filter may not be achieved. With such conventional filters, it is difficult to collect small and large folds simultaneously without sacrificing filtration speed.
[0004]
An object of the present invention is to eliminate such difficulties of the conventional filter.
[0005]
[Means for Solving the Problems]
Invention Menoko which solve the above problems, first, second, and a third invention. The gist of the first invention is a sheet-like water-permeable first filter layer having a large number of apertures, and a large number of filaments bonded to the first filter layer and extending in parallel with each other across the apertures. The bag is formed by both of these filter layers so that the first filter layer is on the inner side and the second filter layer is on the outer side. In the filter.
[0006]
The gist of the second invention is a sheet-like water-permeable first filter layer having a large number of apertures, and a large number of filaments joined to the first filter layer and extending in parallel with each other across the apertures. The bag is formed by both of these filter layers so that the first filter layer is on the outside and the second filter layer is on the inside. In the filter.
[0007]
The gist of the third invention is a sheet-like water-permeable first filter layer having a large number of apertures, and a large number of filaments bonded to the first filter layer and extending in parallel with each other across the apertures. And a water-permeable second filter layer, wherein the first filter layer is laminated on both sides of the second filter layer, and a bag is formed by the laminated filter layers.
[0008]
Oite to a preferred state like the present invention, the first filter layer is a nonwoven fabric, is either porous film and net.
[0009]
In another embodiment , the first filter layer and the second filter layer are intermittently joined.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The details of the filter according to the present invention will be described with reference to the accompanying drawings.
[0011]
1 and 2 are a partially broken perspective view of a filter 1 made into a bag shape, and a partially broken development view obtained by cutting the filter 1 in a double-headed arrow AA direction at a side edge portion 17. The filter 1 is suitable for use in a household sink drain hole, and a vertically long rectangular sheet 2 shown in FIG. 2 is folded along a center line CC that divides the length into two equal parts. The side edge portions 17 of the overlapping sheets 2 are joined at a line 3 extending vertically. The filter 1 has a top opening 4 and a pair of side walls 6 facing each other, and reinforcing sheets 16 are joined to the outer surfaces of both side edge portions 17 of the filter 1.
[0012]
The sheet 2 is a composite sheet having an inner layer 7 made of a water permeable sheet 5 and an outer layer 9 made of a large number of filaments 8 extending in parallel with each other in the vertical direction of the filter 1. For the water-permeable sheet 5, a water-permeable woven fabric or nonwoven fabric, a perforated plastic film, a net, or the like is used, but preferably a heat-weldable and water-permeable nonwoven fabric containing 40% by weight or more of thermoplastic synthetic fiber. Preferably, such a nonwoven fabric having a large number of apertures 10 having a required diameter is used. As the filament 8, a thermoplastic synthetic fiber tow that has been loosened is used, and preferably, a heat-welding tow in which the filament 8 is crimped is used. In the illustrated example, the vertical and horizontal dimensions of the sheet 2 are L and W, and the water-permeable sheet 5 and the filament 8 forming the sheet 2 are inclined joining lines that are intermittently arranged in the vertical direction of the sheet 2. 11 are welded together. The reinforcing sheet 16 is for preventing the filament 8 from fluffing at the side edge 17 of the filter 1, and is joined to the outer surface of the filter 1 by the joining lines 3 and 11. Although a water-impermeable sheet can be used for the reinforcing sheet 16, a water-permeable nonwoven fabric, an opening film, a net, or the like is preferably used.
[0013]
In the filter 1 having such a configuration, waste water is filtered by the inner layer 7 made of the water-permeable sheet 5 and then filtered by the outer layer 9 made of the filament 8. In the inner layer 7, the size of the wrinkles that can be collected is determined by the fiber gap and the diameter of the opening 10. When these gaps or apertures 10 are closed with ridges, the area of the inner layer 7 through which water can pass is reduced and the filtration rate is reduced. In the outer layer 9, when waste water flows while bending between a large number of filaments 8 as flow paths, soot is caught by the filaments 8 and collected, but the filaments 8 form various flow paths. Even if traps are collected, the filtration rate of the wastewater does not decrease immediately. Therefore, in the filter 1, for example, the fiber gaps and apertures 10 are relatively large in the inner layer 7 to collect only large wrinkles, and the outer layer 9 increases the number of filaments 8 and densely. When small cocoons are collected by contact, various large and small cocoons can be collected without sacrificing the filtration rate of the wastewater. In the case where the filament 8 is crimped, fine wrinkles can be easily collected as compared with the case where the filament 8 is straight.
[0014]
However, in this invention, the filament 8 can be used for the inner layer 7, and a water-permeable sheet such as a nonwoven fabric, an apertured film, or a net can be used for the outer layer 9. The filaments 8 extending in parallel with each other can be separated from each other by increasing or decreasing the distance P (see FIG. 1) between adjacent bonding sites in the longitudinal direction. It can be made larger or smaller. These filaments 8 are suitable for collecting large cocoons if the distance P is increased, and are suitable for collecting small cocoons if the distance P is reduced. In order to make the distance P as large as possible, the filament 8 may be joined to the water-permeable sheet 5 only at both ends thereof. Further, in the filter 1 of FIG. 1, the present invention is carried out by providing a water-permeable sheet 5 as used as the inner layer 7 on the outer side of the outer layer 9 made of the filaments 8 and sandwiching the filaments 8 in a sandwich shape. You can also. Which of these aspects of the filter 1 should be taken is determined by the shape of the basket to be collected.
[0015]
If the specific example of the filter 1 is given, the sheet | seat 2 will make a bag using L and W which are 570 mm and 215 mm. In addition, a spunbond nonwoven fabric of polypropylene fiber having a basis weight of 25 g / m ² is used for the water-permeable sheet 5, and a crimped PET fiber having a fineness of 3 d is used for the filament 8 at a ratio of the basis weight of 82 g / m ² . use. The opening 10 of the water-permeable sheet 5 is, for example, 154 pieces and 10 mm in diameter if the x and y dimensions located in the vertical and horizontal central portions are 270 mm and 110 mm and the diameter is 7 mm. 60 cases are formed. However, the necessity and size of the opening 10 and the range in which the hole 10 is to be formed are matters to be determined depending on the size of the ridge to be collected by the sheet 5. The filament 8 is welded to the sheet 5 so as to straddle the fiber gap of the water-permeable sheet 5 and to extend across the opening 10 when the sheet 2 has the opening 10.
[0016]
In the filter 1 thus produced, the time for filtering 1500 l of water containing 10 g of tea leaves was about 30 to 25 seconds, and about 89 to 88% by weight of tea leaves could be collected. On the other hand, in the filter for comparison which consists only of the water-permeable sheet 5 used for the filter 1, the filtration time was 27-24 seconds, and about 58-37 weight% of the tea leaf was able to be collected. These results show that the filter 1 is excellent in filtration performance.
[0017]
The filter 1 according to the present invention can be used as it is without processing the sheet 2 into a bag-like one as shown in the drawing. In the sheet 2, the reinforcing sheet 16 attached to the outer surface of the side edge portion 17 can be omitted. The use of the filter 1 is not limited to collecting the soot.
[0018]
【The invention's effect】
In the filter according to the present invention, the first filter layer made of a water-permeable sheet having a large number of apertures and the second filter layer made of a large number of filaments are overlapped and joined to each other. By collecting large waste in wastewater with the filter layer and collecting small waste with the second filter layer, large and small waste can be collected without sacrificing the filtration time of the wastewater.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view of a filter.
FIG. 2 is a partially broken development view of a filter.
[Explanation of symbols]
1 Filter 4 Opening 5 Water-permeable Sheet 7 First Filter Layer (Inner Layer)
8 Filament 9 Second filter layer (outer layer)
10 Opening

Claims (5)

A sheet-like water-permeable first filter layer having a large number of apertures, and a water-permeable second filter layer composed of a large number of filaments bonded to the first filter layer and extending in parallel with each other across the apertures A filter comprising: a bag formed of both the filter layers so that the first filter layer is on the inside and the second filter layer is on the outside . A sheet-like water-permeable first filter layer having a large number of apertures, and a water-permeable second filter layer composed of a large number of filaments bonded to the first filter layer and extending in parallel with each other across the apertures A filter comprising: a bag formed of both the filter layers so that the first filter layer is on the outside and the second filter layer is on the inside . A sheet-like water-permeable first filter layer having a large number of apertures, and a water-permeable second filter layer composed of a large number of filaments bonded to the first filter layer and extending in parallel with each other across the apertures A filter comprising: the first filter layer laminated on both sides of the second filter layer, and a bag formed of the laminated filter layers . The filter according to any one of claims 1 to 3, wherein the first filter layer is any one of a nonwoven fabric, an apertured film, and a net. The filter according to any one of claims 1 to 4 , wherein the first filter layer and the second filter layer are intermittently joined.

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