JPH0557115A - Water permeable sheet and drain bag for garbage prepared from the sheet - Google Patents

Abstract

PURPOSE:To obtain a water permeable sheet conveniently and inexpensively used and capable of effectively collecting the solid matter and oil component in waste water by providing reinforcing parts to a stretched foamed split film at specific intervals so as to cross the stretching direction of said film. CONSTITUTION:Reinforcing parts composed of elongated polyethylene tapes are provided to a stretched foamed split film 2 composed of a resin absorbing oils and fats such as polypropylene or polyethylene in a square lattice form at intervals of 5-30mm so as to cross the stretching direction of said film 2. The water permeable sheet thus produced is especially suitable for a drain bag for garbage of a household kitchen and can perfectly collect fine waste refuse and can prevent environmental pollution due to living waste water because it has oil absorbing properties.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-permeable sheet, particularly a water-permeable sheet suitable for use in treating raw foods and wastewater in domestic kitchens and the like, and a production using the water-permeable sheet. Draining bag for raw garbage. The sheet according to the present invention can be used not only as drainage but also as a filter material for exhaust.

[0002]

2. Description of the Related Art Today, sources of pollution such as river pollution are
It is said to be in domestic wastewater from homes. Also, on the other hand,
Disposal of food waste generated from homes and commercial kitchens is also a serious social problem.

If fine garbage and oil are prevented from flowing into the sewage from kitchens such as homes, and the captured garbage is well drained and semi-dried and handed over to the waste disposal department of the local government. It is extremely convenient. However, since the conventionally known filter for domestic waste water is made of metal and has coarse meshes, it cannot collect fine food waste and cannot prevent the oil from flowing out.

Further, the water draining bag for household waste used at home has coarse mesh and cannot absorb oil. A tablespoon of oil is said to bring about the same level of water pollution as the effluent discharged by one adult a day, and the cost of treating these is extremely huge.

As a countermeasure against these problems, it has been strongly demanded to remove solids and oils as much as possible from the wastewater of households and other facilities. These facilities include restaurants, fresh fish shops, florist shops, bathhouses, barber shops, beauty salons, laundry shops, livestock and poultry breeding and processing facilities, botanical gardens, aquariums, pet shops, theaters, farms, hospitals, schools. There are other public buildings. In addition to drainage for the kitchen,
For example, there is a demand for a filter for a circulating bath facility, a pool, and the like, and a filter that can be easily used to remove oil smoke and the like from the exhaust gas of a kitchen or the like. These filters must be inexpensive and easy to use, and should not cause environmental pollution when discarded.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can be used conveniently and inexpensively, and is capable of effectively collecting solids and oils from wastewater. An object of the present invention is to provide a sheet rich in water and a drainer bag for food waste made of the sheet. The sheet according to the present invention can be used not only as drainage but also as a filter material for exhaust.

[0007]

The above objects of the present invention are as follows.
5mm or more 30 crossing the stretching direction of stretch-foamed spread film
This is achieved by a water-permeable sheet provided with reinforcing portions at intervals of not more than mm, and a drainage bag for food waste produced from the water-permeable sheet.

As a material for the stretch-expanded spread film, a resin that absorbs fats and oils, such as polypropylene,
Use polyethylene, nylon, etc. In one embodiment, the stretched and foamed open film is singly or plurally laminated, and thin or long synthetic resin such as polypropylene, polyethylene or nylon is laminated on or between them to be heat-bonded or melted resin. To form a reinforcing portion. Further, the reinforcing portion can also be formed by adhering a plurality of stretched expanded fiber spread films that are stacked on each other with a thin band-shaped thermal adhesive portion.

The stretch-foam spread film is, for example, a polypropylene open-spreading film which is extruded and stretched while being foamed into a film form from a narrow T die or annular die. This stretch-expanded spread film is a non-woven thin film made of fibers extending in the stretching direction.

In this stretch-expanded spread film, since the fibers are parallel to the stretching direction, there is a problem in that it is relatively strong in tension in the stretching direction but weak in tearing in the transverse direction perpendicular to the stretching direction.

Therefore, in the present invention, in order to provide a strong tear strength in the lateral direction, the reinforcing portions are provided at intervals of 5 mm or more and 30 mm or less intersecting the stretching direction of the stretched and foamed spread film. In general use, if the distance between the reinforcing parts is less than 5 mm, the filtration area will be reduced too much and it will be uneconomical.
If it is larger than mm, the strength of the middle portion of the reinforcing portion becomes insufficient, and a rupture accident will occur during filtration. The distance between the reinforcing portions is determined by the areal density of the expanded and expanded fiber film, the number of sheets to be used, the purpose of use of the sheet, etc., and in some cases 5 mm or less, for example, about 3 mm or less, or vice versa. It may be 30 mm or more, for example, about 50 mm or more.

The reinforcing portion may be provided in the form of horizontal stripes at right angles to the stretching direction, but it may be in the form of diagonal stripes inclined by about 30 to 60 degrees, and may also be a checkered pattern, a rhombus, a hexagonal pattern, an arabesque pattern, a continuous pattern. It may be annular, corrugated, or floral. Providing reinforcement not only in the lateral direction makes the entire seat stiffer, which is convenient for manufacturing and use.

This stretch-foam spread film is extremely thin,
Since a small amount of reinforcing material is required, the material consumption is small,
Therefore, it can be provided inexpensively and in large quantities, and even if it is incinerated together with the collected dust and oil and fat after use, it does not damage the incinerator or generate harmful substances. Further, since the stretched expanded fiber film has a large surface area, it has an effect of adsorbing a large amount of fats and oils in comparison with its weight and purifying domestic wastewater.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing the structure of a water permeable sheet 1 according to the present invention. Thus,
In this water-permeable sheet 1, elongated polyethylene tapes 3 having a square lattice shape are thermocompression-bonded on a stretched expanded fiber film 2 to form reinforcing portions 4.

FIG. 2 is a principle view showing a method of manufacturing a water permeable sheet 5 different from the water permeable sheet 1 described above. Here, a plurality of stretch-expanded fiber-opening films 2 are stacked and thermocompression-bonded by a heat roll 6 having a hexagonal projection on the surface, and the pressure-bonded portion is used as a reinforcing portion 7.

Although not shown in the drawing, the reinforcing portion is
For example, it is also recommended that an appropriate molten resin is applied or adhered on the stretched and foamed open film, or that fibers or the like to which the molten resin is adhered are adhered. By doing so, a desired pattern or character can be displayed.

Thus, the water-permeable sheet produced as described above is used to produce a bag of an appropriate size by a normal bag-making process. This bag is particularly suitable as a drainer bag for kitchen garbage for household kitchens. The reason is that this sheet is made of a stretch-expanded fiber-opening film having fine meshes and is reinforced with an appropriate reinforcing material, so that it can be completely collected with fine dust and has sufficient strength and water permeability. .. Further, since this garbage bag is made of lipophilic resin, it has an ability to adsorb a certain amount of fats and oils from domestic kitchen drainage, and therefore has an effect of preventing the environment from being polluted by domestic drainage. Of course, this garbage bag uses only a very small amount of material, so it can be incinerated together with the garbage.

[0018]

EFFECTS OF THE INVENTION Since the present invention is constituted as described above, according to the present invention, the water permeability and the hydrophilic property are extremely fine and effective for capturing solids and oils and fats in drainage or exhaust gas. It is possible to supply a large amount of oily sheet and a drainage bag for food waste made of the sheet at a very low cost.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration of a water permeable sheet 1 according to the present invention.

FIG. 2 is a principle view showing a method of manufacturing a water permeable sheet 5 different from the water permeable sheet 1.

[Explanation of symbols]

 1, 5 ... Water-permeable sheet 2 ... Stretched and foamed open film 3 ... Polyethylene tape 4, 7 ... Reinforcement part 6 ..... Thermal roll

Claims (7)

[Claims] 1. A water-permeable sheet comprising reinforcing portions provided at intervals of 5 mm or more and 30 mm or less so as to intersect the stretching direction of a stretched and expanded fiber film. 2. The water-permeable sheet according to claim 1, wherein the stretched expanded fiber film is made of polypropylene. 3. The water-permeable sheet according to claim 1, wherein a plurality of stretch-expanded fiber-opening films are stacked and used. 4. The water-permeable sheet according to claim 1, wherein the reinforcing portion is formed by thermally adhering a thin and elongated synthetic resin tape to the stretch-foam spread film. 5. The water-permeable sheet according to claim 1, wherein the reinforcing portion is formed by mutually adhering a plurality of stretched expanded fiber films laminated by a thin band-shaped heat-bonding portion. 6. The water-permeable sheet according to claim 1, wherein the reinforcing portion is formed by applying a molten resin in a thin strip shape on the stretched and foamed spread film. 7. A drainage bag for food waste, which comprises a water-permeable sheet and is provided with reinforcing portions at intervals of 5 mm or more and 30 mm or less intersecting the stretching direction of the stretched and foamed open film.