JP2024002849A - Soft storage bag for tap water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soft storage bag for tap water that stores tap water less susceptible to ultraviolet rays, uses a low environmental impact material for easy recycling, and ensures visibility of an amount of water in the bag.

SOLUTION: The soft storage bag for tap water characteristically includes a visible transparent portion provided in a vertical direction of the soft and flexible bag in the hung condition when the bag is filled with tap water and hung, which allows the amount of water in the bag to be seen, the bag excluding the visible transparent portion being treated with ultraviolet light shielding. The bag is characterized in that the laminated film composition as a bag-making material is formed, sequentially from the outside to the inside of the bag, of: a transparent synthetic resin base layer; a UV-blocking opaque printed layer to be treated with ultraviolet light shielding; a transparent adhesive layer; and a heat-bondable transparent synthetic resin layer.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a soft water bag for receiving and storing tap water from a water truck carrying a tank full of tap water in the event of an emergency such as a disaster, that is, a soft storage bag for tap water.

In disaster areas, the first priority is to rescue the victims, and a supply of drinking water is necessary to sustain life. For this reason, the national and local governments dispatch water tankers full of tap water to disaster areas to supply tap water. Distribute soft storage bags (hereinafter simply referred to as storage bags).
The present invention relates to a soft storage bag for tap water (hereinafter also simply referred to as a storage bag) used for such uses.

Conventionally, as this type of storage bag, a transparent bag mainly made of a soft material such as nylon or polyethylene has been used. The reason why soft materials are used is to minimize storage and transportation space when storing and transporting large numbers of bags in case of emergencies, and because bags made of soft materials can be folded into a small size. The reason why the bags are transparent is to make it easy for disaster victims to visually check the amount of water being injected when water is supplied from a water truck, and the remaining amount during storage for disaster victims.

There is the following literature as a prior literature on bags for storing emergency drinking water.
Patent No. 4627187

In general, in order to preserve tap water, the Water Supply Act requires that residual chlorine be maintained at 0.1 mg/L or more (hereinafter also referred to as legal water quality) in order to suppress the growth of disease-causing microorganisms and bacteria. It is mandatory. Therefore, in order to preserve tap water as a drink, it is desirable to use a storage bag that can retain this legal residual chlorine for a long period of time.

However, with conventional storage bags such as those mentioned above, that is, transparent storage bags, tap water is easily exposed to ultraviolet rays, and exposure to ultraviolet rays accelerates the decomposition of residual chlorine, making it difficult to withstand long-term storage. Since residual chlorine in tap water naturally decomposes over time, it is desirable to store the storage bag containing tap water in a cool, dark place out of the reach of ultraviolet rays. At disaster sites, etc., it is not always possible to store food in a cool, dark place.
In addition, for disaster victims, etc., it is necessary to accurately grasp the remaining amount of tap water, which is essential for life support. It is difficult to accurately determine the amount remaining in a soft storage bag, which has an irregular shape depending on the situation.

On the other hand, since storage bags used during disasters are disposed of in large quantities as waste, consideration must be given to the environment, such as the use of low-impact environmentally friendly materials and the ease of recycling.
It is well known that synthetic resin film laminated with aluminum foil is an excellent container and packaging material with UV-blocking properties, but laminated aluminum foil has problems in terms of waste treatment and recycling. Due to these problems, in recent years there has been a movement to replace aluminum foil with films or printing coated with inorganic oxide vapor deposition.

However, when such container packaging materials are used as tap water storage bags used in emergencies such as disasters, there is a problem in that the contents are difficult to see from outside the bag. This is because filling tap water into bags in emergencies such as disasters is done manually in most cases.

In order to meet the above-mentioned problems, the present invention is a bag for storing tap water that is not easily affected by sunlight, especially ultraviolet rays, uses materials with low environmental impact, is easy to recycle, and is The purpose of the present invention is to provide a bag that ensures visibility of the amount of water injected into the bag or the amount of water remaining.

The invention of a flexible storage bag for tap water according to claim 1 is characterized in that when a flexible bag is filled with tap water and suspended, the amount of water in the bag can be visually checked in the vertical direction of the bag in the suspended state. The bag is characterized in that it is provided with a transparent portion and is subjected to ultraviolet ray shielding treatment on the bag excluding the visually transparent portion.

The invention of a soft storage bag for tap water according to claim 2 is a flexible bag filled with tap water and suspended, and the amount of water in the bag can be visually checked in the vertical direction of the bag in the suspended state. The bag is characterized in that a transparent portion is provided and the bag except the visually transparent portion and the bottom portion of the bag is subjected to ultraviolet shielding treatment.

The invention according to claim 3 is characterized in that in the soft storage bag for tap water according to claims 1 and 2, at least one visually transparent portion is provided in the shape of a thin strip from the top end of the bag toward the bottom end. shall be.

The fourth aspect of the invention is that in the soft storage bag for tap water according to the first, second, and third aspects, the laminated film structure as the bag-making material of the bag is sequentially arranged from the outside to the inside of the bag. It is characterized by a laminated film structure consisting of a transparent synthetic resin base layer, an ultraviolet blocking opaque printed layer subjected to ultraviolet blocking treatment, a transparent adhesive layer, and a heat-fusible transparent synthetic resin layer.

The invention of a soft storage bag for tap water according to claim 5 is characterized in that the ultraviolet blocking opaque printed layer according to claim 4 is provided on the entire surface of the transparent synthetic resin base layer except for the visually transparent part. do.

The invention of the soft storage bag for tap water according to claim 6 is characterized in that the ultraviolet blocking opaque printed layer according to claim 4 is provided on the entire surface of the transparent synthetic resin base material layer except for the visually transparent part and the bottom part of the bag. It is characterized by the fact that

The invention of a soft storage bag for tap water according to claim 7 is characterized in that the ultraviolet blocking opaque printing layer according to claims 4, 5, and 6 is a white ink containing a white pigment and a binder. do.

The invention of the soft storage bag for tap water according to claim 8 is such that the ultraviolet blocking opaque printed layer according to claim 4, claim 5, claim 6, and claim 7 absorbs hypochlorous acid from the ultraviolet rays that reach the earth's surface. It is characterized by having a transmittance of 0.01% or less in a wavelength range that promotes the decomposition of sodium.

The invention of a soft storage bag for tap water according to claim 9 is based on a residual water amount value obtained by actually measuring the remaining amount when the bag is suspended at the edge of the visually transparent portion according to each of claims 1 to 8. It is characterized by having undergone.

The invention of a soft storage bag for tap water according to claim 10 is such that when the soft storage bag for tap water according to each of claims 1 to 9 is filled with water, the bottom part of the boat bottom type expands and becomes self-supporting. characterized by something.

According to each of the inventions of claims 1 to 10, each has a higher ultraviolet blocking effect than conventional storage bags, enables long-term preservation of legal residual chlorine in tap water, and reduces the amount of water injected into the bag. You can easily and accurately know the remaining amount in the bag.

According to each of the inventions of claims 4 to 8, since an environmentally friendly and low environmental impact material is used as the bag making material, post-processing such as recycling after use as a storage bag is easy. becomes.

According to each of the inventions of claims 7 and 8, it is possible to suppress the decomposition of sodium hypochlorite, which is residual chlorine contained in tap water, and it is possible to preserve the legal residual chlorine in tap water for a long period of time. be able to.

According to the ninth aspect of the present invention, the amount of water injected into the bag and the amount remaining in the bag can be visually confirmed more accurately than the conventional measuring method.

According to the tenth aspect of the invention, the soft storage bag for tap water can be stored more stably.

FIG. 1 is a rear perspective view of a soft storage bag for tap water. FIG. 2 is a partially enlarged cross-sectional view that crosses the visually transparent portion. FIG. 3 is a rear view of the soft storage bag for tap water. FIG. 4 is a sectional view taken along line BB in FIG.

Hereinafter, as the best mode for carrying out the present invention, an example of a standing pouch-type soft storage bag for tap water will be described with reference to FIGS. 1 to 4.

The standing pouch-type flexible bag shown in the figure is made of highly flexible, soft resin with a circular or boat-bottom bottom so that the bag can stand on its own when filled with liquid. This is a bag for liquid packaging that is made into a bag and becomes flat when folded or bends freely when not filled with liquid, but becomes self-supporting when filled with liquid.

This standing pouch type bag includes a front side bag member 1 having a substantially rectangular shape, and a back side bag member having the same shape as the front side bag member 1, in which the upper side and three left and right sides are bonded back to back with the front side bag member. 2, a bottom bag member that is located on the lower side of the front bag member 1 and the back bag member 2 and whose outer peripheral edge is bonded to both lower sides of the front bag member 1 and the back bag member 2; The bag is made using a boat bottom type bottom bag member No. 3.

Reference numeral 4 in the figure is a water port provided on the upper side where the front side bag member 1 and the back side bag member 2 are pasted together, and in this example, it serves as a tap water inlet and a water outlet. There is.
In this embodiment, one water inlet 4 serves as both the inlet and the water outlet, but the invention is not limited to this, and the inlet and the water outlet may be provided separately depending on the form of the bag. (not shown), the inlet may have a large diameter to shorten the water injection time (not shown), or the water outlet may be configured to open and close with a cock, for example, for hygiene reasons (not shown). figure). In the case of a water outlet having a faucet structure that opens and closes with a cock, it is preferable to provide it at the lower side of a relatively large-capacity bag (not shown).

In FIG. 2, the structure of the bag shown in the example is made of a laminated structure in which a plurality of sheet-like film materials are laminated. , a laminate sheet consisting of four layers, in order: a transparent synthetic resin base layer 5, an ultraviolet blocking opaque printed layer 6 for blocking ultraviolet rays, a transparent adhesive layer 7, and a heat-fusible transparent synthetic resin layer 8 necessary for bag making. However, it is of course not limited to this structure.
All of these bag-making materials are environmentally friendly and low-impact materials, so post-processing such as recycling after use as a storage bag is easy.

As the transparent synthetic resin base layer 5, it is preferable to use a polyolefin resin film such as a polyamide (PA) resin film, a polyethylene terephthalate (PET) resin film, or a plant-derived polyolefin.
The thickness of the transparent synthetic resin base layer 5 in this embodiment bag having a capacity of about 6 liters is 5 to 50 μm.

Although there are no restrictions or limitations on the use of a material with an ultraviolet blocking effect as the ultraviolet blocking opaque printing layer 6 for blocking ultraviolet rays, in this example, a white ink containing a white pigment and a binder is used. When the transparent synthetic resin base layer 5 is made into a bag, it is printed on the back side of the transparent synthetic resin base layer 5, that is, on the inside of the bag as shown.
Although there are no particular limitations on the raw materials constituting the white ink, titanium oxide is preferably used as the white pigment, and polyurethane resin is preferably used as the binder.

The thickness of the ultraviolet blocking opaque printed layer 6 in this embodiment is such that the transmittance of the ultraviolet rays reaching the earth's surface in the wavelength range of 280 to 380 nm, which is said to promote the decomposition of sodium hypochlorite, is 0.01% or less. It has been adjusted as follows. Thereby, the decomposition of sodium hypochlorite, which is the residual chlorine contained in tap water, can be effectively suppressed, and the legal residual chlorine in tap water can be stored for a longer period of time.

The transparent adhesive layer 7 is a urethane-based adhesive that adheres the transparent synthetic resin base layer 5 provided with the UV-blocking opaque printed layer 6 and the heat-fusible transparent synthetic resin layer 8. However, other suitable adhesives may be used.

The heat-fusible transparent synthetic resin layer 8 is the innermost layer of the bag that comes into contact with the tap water that is the contents, and is a layer used for heat-sealing for bag making. The heat-fusible transparent synthetic resin layer 8 is preferably an unstretched polyethylene (PE) resin film, but may also be a polyolefin derived from plants. The thickness of the heat-fusible transparent synthetic resin layer 8 in this example is 100 to 200 μm.

In FIGS. 1 to 3, the reference numeral 9 indicates the vertical direction from the top end of the bag to the bottom end, in other words, from the top end of the bag when the bag is suspended, in order to visually check the amount of water inside the bag. In this embodiment, a relatively thin band-shaped transparent portion is provided toward the lower end side. Hereinafter, this visually visible transparent portion will also be referred to as a visually transparent portion.
In this embodiment, one relatively thin band-shaped transparent part is provided as the visible transparent part 9, but since the primary purpose of this bag is to block ultraviolet rays, a transparent part that allows ultraviolet rays to pass through is provided. Since the purpose is to minimize the remaining amount, the transparent portion 9 may have a minimum shape that allows the remaining amount to be visually observed, and is not limited to the shape or number shown in the embodiment.

The bag in this example is a standing pouch type that can stand on its own when filled with liquid, but even such a standing pouch type bag has difficulty standing on its own when it is not sufficiently filled with liquid. Regardless of whether it is a standing pouch type or not, the amount of water can be easily checked when the pouch is a flexible bag that can be folded flat or bent freely, for example, when it is suspended by hand at eye level. A visually transparent portion 9 is provided to allow viewing.

In the vertical direction near the edge of the visually transparent portion 9, it is preferable to appropriately measure the remaining amount of water by actually measuring the remaining amount while the bag is suspended. This is because this type of storage bag is flexible, so the bag deforms depending on the amount remaining, and the shape of each remaining amount changes depending on the degree of softness and shape of the bag. For each degree of softness and shape of the bag, a scale is marked as a mark along the edge of the visually transparent part 9 of the bag for each degree of remaining amount, that is, the remaining water level in the suspended state, for example, for each remaining amount of 500 ml, 1000 ml, 1500 ml, and 2000 ml. It is recommended to apply the mark, or match the remaining amount value to the mark. Thereby, the amount of water to be injected and the remaining amount can be easily determined more accurately than the amount of water to be injected and the amount of remaining water to be determined by visual measurement based only on visual inspection.

In this example, ultraviolet rays are shielded on the entire bag except for the visually transparent part, but it is not necessary to apply it on the entire bag, and it is difficult for ultraviolet rays to penetrate into the bag when it is stored with tap water. A portion, for example a bottom portion of the bag, may be excluded.

The present invention can be widely used not only for soft storage bags for tap water but also for containers for storing tap water.

1 Front side bag member 2 Back side bag member 3 Bottom member 4 Water port (inlet and water outlet)
5 Transparent synthetic resin base layer 6 Ultraviolet blocking opaque printed layer 7 Transparent adhesive layer 8 Heat-fusible transparent synthetic resin layer 9 Visually transparent portion

TECHNICAL FIELD The present invention relates to a soft water bag for receiving and storing tap water from a water truck carrying a tank full of tap water in the event of an emergency such as a disaster, that is, a soft storage bag for tap water.

In disaster areas, the first priority is to rescue the disaster victims, and a supply of drinking water is necessary to sustain life. For this reason, the national and local governments dispatch water tankers full of tap water to disaster areas to supply tap water. Distribute soft storage bags (hereinafter simply referred to as storage bags).
The present invention relates to a soft storage bag for tap water (hereinafter also simply referred to as a storage bag) used for such purposes.

Conventionally, as this type of storage bag, a transparent bag mainly made of a soft material such as nylon or polyethylene has been used. The reason why soft materials are used is to minimize storage and transportation space when storing and transporting large numbers of bags in case of emergencies, and because bags made of soft materials can be folded into a small size. The reason why the bags are transparent is to make it easy for disaster victims to visually check the amount of water being injected when water is supplied from a water truck, and the remaining amount during storage for disaster victims.

Patent Document 1 Patent No. 4627187

In general, in order to preserve tap water, the Water Supply Act requires that residual chlorine be maintained at 0.1 mg/L or more (hereinafter also referred to as legal water quality) in order to suppress the proliferation of disease-causing microorganisms and bacteria. It is being Therefore, in order to preserve tap water as a drink, it is desirable to use a storage bag that can retain this legal residual chlorine for a long period of time.

However, with conventional storage bags such as those mentioned above, that is, transparent storage bags, tap water is easily exposed to ultraviolet rays, and exposure to ultraviolet rays accelerates the decomposition of residual chlorine, making it difficult to withstand long-term storage. Since residual chlorine in tap water naturally decomposes over time, it is desirable to store the storage bag containing tap water in a cool, dark place out of the reach of ultraviolet rays. At disaster sites, etc., it is not always possible to store food in a cool, dark place.
In addition, for disaster victims, etc., it is necessary to accurately grasp the remaining amount of tap water, which is essential for life support. It is difficult to accurately determine the amount remaining in a soft storage bag, which has an irregular shape depending on the situation.

On the other hand, since storage bags used during disasters are disposed of in large quantities as waste, consideration must be given to the environment, such as the use of low-impact environmentally friendly materials and the ease of recycling.
It is well known that synthetic resin film laminated with aluminum foil is an excellent container and packaging material with UV-blocking properties, but laminated aluminum foil has problems in terms of waste treatment and recycling. Due to these problems, in recent years there has been a movement to replace aluminum foil with films or printing coated with inorganic oxide vapor deposition.

However, when such container packaging materials are used as tap water storage bags used in emergencies such as disasters, there is a problem in that the contents are difficult to see from outside the bag. This is because filling tap water into bags in emergencies such as disasters is done manually in most cases.

In order to meet the above-mentioned problems, the present invention is a bag for storing tap water that is not easily affected by sunlight, especially ultraviolet rays, uses materials with low environmental impact, is easy to recycle, and is The purpose of the present invention is to provide a bag that ensures visibility of the amount of water injected into the bag or the amount of water remaining.

The invention of the soft storage bag for tap water according to claim 1 is as follows:
When a flexible bag is filled with tap water and suspended, a thin strip-shaped visual check that allows the amount of water inside the bag to be seen in the vertical direction from the top end to the bottom end of the bag in the suspended state. In addition to providing a transparent portion, the bag excluding the visually transparent portion is subjected to ultraviolet shielding treatment,
The visually transparent part is given a residual water amount value obtained by actually measuring the remaining amount of tap water when the bag is suspended,
The laminated film structure used as the bag-making material for the bag includes, in order from the outside to the inside of the bag, a transparent synthetic resin base layer, an ultraviolet-blocking opaque printed layer for ultraviolet-blocking treatment, a transparent adhesive layer, and a heat-fusible transparent synthetic resin. As a layer,
The ultraviolet-blocking opaque printing layer is a white ink containing a white pigment and a binder, and is applied to the transparent synthetic resin base layer over the entire surface of the transparent synthetic resin layer except for the visually transparent part, and absorbs sodium hypochlorite from the ultraviolet rays that reach the earth's surface. It is characterized in that the transmittance in the wavelength region that promotes the decomposition of is set to 0.01% or less .

The invention of the soft storage bag for tap water according to claim 2,
When a flexible bag is filled with tap water and suspended, a thin strip-shaped visual check that allows the amount of water inside the bag to be seen in the vertical direction from the top end to the bottom end of the bag in the suspended state. In addition to providing a transparent portion, the bag except the visually transparent portion and the bottom portion of the bag is subjected to ultraviolet ray shielding treatment, and the visually transparent portion is provided with a residual amount of tap water, which is the actual amount of tap water remaining when the bag is hung. The laminated film structure used as the bag-making material for the bag includes, in order from the outside to the inside of the bag, a transparent synthetic resin base layer, an ultraviolet-blocking opaque printed layer that undergoes ultraviolet-blocking treatment, a transparent adhesive layer, and a heat-melting layer. The UV blocking opaque printing layer is an adhesive transparent synthetic resin layer, and the ultraviolet blocking opaque printing layer is coated with white ink containing a white pigment and a binder, and is applied to the entire surface of the transparent synthetic resin base layer except for the visually transparent part and the bottom part of the bag. Specifically, the transmittance of the wavelength range that promotes the decomposition of sodium hypochlorite among the ultraviolet rays that reach the earth's surface is set to 0.01% or less, and when the bag is filled with water, the bottom part of the ship's bottom expands. It is characterized by being able to stand on its own.

According to each of the inventions of claims 1 and 2 , both have a higher ultraviolet blocking effect than conventional storage bags, enable long-term preservation of legal residual chlorine in tap water, and reduce the amount of water injected into the bag. You can easily and accurately know the remaining amount in the bag.

In addition, since an environmentally friendly and low environmental impact material is used as the bag making material, post-processing such as recycling after use as a storage bag is facilitated.

Furthermore, it is possible to suppress the decomposition of sodium hypochlorite, which is the residual chlorine contained in tap water, and it is possible to preserve the legal residual chlorine in tap water for a long period of time.

In addition, the amount of water injected into the bag and the amount remaining in the bag can be visually confirmed more accurately than the conventional measuring method.

Moreover, the soft storage bag for tap water can be stored more stably.

FIG. 1 is a rear perspective view of a soft storage bag for tap water. FIG. 2 is a partially enlarged cross-sectional view that crosses the visually transparent portion. FIG. 3 is a rear view of the soft storage bag for tap water. FIG. 4 is a sectional view taken along line BB in FIG.

Hereinafter, as the best mode for carrying out the present invention, an example of a standing pouch-type soft storage bag for tap water will be described with reference to FIGS. 1 to 4.

The standing pouch-type flexible bag shown in the figure is made of highly flexible, soft resin with a circular or boat-bottom bottom so that the bag can stand on its own when filled with liquid. This is a bag for liquid packaging that is made into a bag and becomes flat when folded or bends freely when not filled with liquid, but becomes self-supporting when filled with liquid.

This standing pouch type bag includes a front side bag member 1 having a substantially rectangular shape, and a back side bag member having the same shape as the front side bag member 1, in which the upper side and three left and right sides are bonded back to back with the front side bag member. 2, a bottom bag member that is located on the lower side of the front bag member 1 and the back bag member 2 and whose outer peripheral edge is bonded to both lower sides of the front bag member 1 and the back bag member 2; The bag is made using a boat bottom type bottom bag member No. 3.

Reference numeral 4 in the figure is a water port provided on the upper side where the front side bag member 1 and the back side bag member 2 are pasted together, and in this example, it serves as a tap water inlet and a water outlet. There is.
In this embodiment, one water inlet 4 serves as both the inlet and the water outlet, but the invention is not limited to this, and the inlet and the water outlet may be provided separately depending on the form of the bag. (not shown), the inlet may have a large diameter to shorten the water injection time (not shown), or the water outlet may be opened and closed with a cock type faucet structure for hygiene reasons (not shown). figure). In the case of a water outlet having a faucet structure that opens and closes with a cock, it is preferable to provide it at the lower side of a relatively large-capacity bag (not shown).

In FIG. 2, the structure of the bag shown in the example is made of a laminated structure in which a plurality of sheet-like film materials are laminated. , a laminate sheet consisting of four layers, in order: a transparent synthetic resin base layer 5, an ultraviolet blocking opaque printed layer 6 for blocking ultraviolet rays, a transparent adhesive layer 7, and a heat-fusible transparent synthetic resin layer 8 necessary for bag making. However, it is of course not limited to this structure.
All of these bag-making materials are environmentally friendly and low-impact materials, so post-processing such as recycling after use as a storage bag is easy.

As the transparent synthetic resin base layer 5, it is preferable to use a polyolefin resin film such as a polyamide (PA) resin film, a polyethylene terephthalate (PET) resin film, or a plant-derived polyolefin.
The thickness of the transparent synthetic resin base layer 5 in this embodiment bag having a capacity of about 6 liters is 5 to 50 μm.

Although there are no restrictions or limitations on the use of a material with an ultraviolet blocking effect as the ultraviolet blocking opaque printing layer 6 for blocking ultraviolet rays, in this example, a white ink containing a white pigment and a binder is used. When the transparent synthetic resin base layer 5 is made into a bag, it is printed on the back side of the transparent synthetic resin base layer 5, that is, on the inside of the bag as shown.
Although there are no particular limitations on the raw materials constituting the white ink, titanium oxide is preferably used as the white pigment, and polyurethane resin is preferably used as the binder.

The thickness of the ultraviolet blocking opaque printed layer 6 in this embodiment is such that the transmittance of the ultraviolet rays that reach the earth's surface in the wavelength range of 280 to 380 nm, which is considered to promote the decomposition of sodium hypochlorite, is 0.01% or less. It has been adjusted as follows. Thereby, the decomposition of sodium hypochlorite, which is the residual chlorine contained in tap water, can be effectively suppressed, and the legal residual chlorine in tap water can be stored for a longer period of time.

The transparent adhesive layer 7 is a urethane-based adhesive that adheres the transparent synthetic resin base layer 5 provided with the UV-blocking opaque printed layer 6 and the heat-fusible transparent synthetic resin layer 8. However, other suitable adhesives may be used.

The heat-fusible transparent synthetic resin layer 8 is the innermost layer of the bag that comes into contact with the tap water that is the contents, and is a layer used for heat-sealing for bag making. The heat-fusible transparent synthetic resin layer 8 is preferably an unstretched polyethylene (PE) resin film, but may also be a polyolefin derived from plants. The thickness of the heat-fusible transparent synthetic resin layer 8 in this example is 100 to 200 μm.

In FIGS. 1 to 3, the reference numeral 9 indicates the vertical direction from the top end of the bag to the bottom end, in other words, from the top end of the bag when the bag is suspended, in order to visually check the amount of water inside the bag. In this embodiment, a relatively thin band-shaped transparent portion is provided toward the lower end side. Hereinafter, this visually visible transparent portion will also be referred to as a visually transparent portion.
In this embodiment, one relatively thin band-shaped transparent part is provided as the visible transparent part 9, but since the primary purpose of this bag is to block ultraviolet rays, there is no transparent part that allows ultraviolet rays to pass through. Since the purpose is to minimize the amount, the transparent portion 9 may have the minimum shape that allows the remaining amount to be visually observed, and is not limited to the shape or number shown in the embodiment.

The bag in this example is a standing pouch type that can stand on its own when filled with liquid, but even such a standing pouch type bag has difficulty standing on its own when it is not sufficiently filled with liquid. Regardless of whether it is a standing pouch type or not, the amount of water can be easily checked when the pouch is a flexible bag that can be folded flat or bent freely, for example, when it is suspended by hand at eye level. A visually transparent portion 9 is provided to allow viewing.

In the vertical direction near the edge of the visually transparent portion 9, it is preferable to appropriately measure the remaining amount of water by actually measuring the remaining amount while the bag is suspended. This is because this type of storage bag is flexible, so the bag deforms depending on the amount remaining, and the shape of each remaining amount changes depending on the degree of softness and shape of the bag. For each degree of softness and shape of the bag, a scale is marked as a mark along the edge of the visually transparent part 9 of the bag for each degree of remaining amount, that is, the remaining water level in the suspended state, for example, for each remaining amount of 500 ml, 1000 ml, 1500 ml, and 2000 ml. It is recommended to apply the mark, or match the remaining amount value to the mark. Thereby, the amount of water to be injected and the remaining amount can be easily determined more accurately than the amount of water to be injected and the amount of remaining water to be determined by visual measurement based only on visual inspection.

In this example, ultraviolet rays are shielded on the entire bag except for the visually transparent part, but it is not necessary to apply it on the entire bag, and it is difficult for ultraviolet rays to penetrate into the bag when it is stored with tap water. A portion, for example a bottom portion of the bag, may be excluded.

The present invention can be widely used not only for soft storage bags for tap water but also for containers for storing tap water.

1 Front side bag member 2 Back side bag member 3 Bottom member 4 Water port (inlet and water outlet)
5 Transparent synthetic resin base layer 6 Ultraviolet blocking opaque printed layer 7 Transparent adhesive layer 8 Heat-adhesive transparent synthetic resin layer 9 Visually transparent portion

Claims (10)

When a flexible bag is filled with tap water and suspended, a visually transparent part is provided in the vertical direction of the bag in the suspended state so that the amount of water in the bag can be visually checked, and the bag excluding the visually transparent part is A soft storage bag for tap water that features ultraviolet shielding treatment. When a flexible bag is filled with tap water and suspended, a visually transparent part is provided in the vertical direction of the bag in the suspended state so that the amount of water in the bag can be seen. A soft storage bag for tap water characterized by having undergone ultraviolet ray shielding treatment on the bag except for the bottom part. 3. The soft storage bag for tap water according to claim 1, wherein at least one visually transparent portion is provided in the form of a thin strip from the upper end to the lower end of the bag. In the soft storage bag for tap water according to claims 1, 2, and 3, the laminated film structure as the bag-making material of the bag includes, in order from the outside to the inside of the bag, a transparent synthetic resin base layer, an ultraviolet ray A soft storage bag for tap water characterized by having a laminated film structure consisting of an ultraviolet-blocking opaque printed layer subjected to shielding treatment, a transparent adhesive layer, and a heat-fusible transparent synthetic resin layer. 5. A soft storage bag for tap water according to claim 4, wherein the ultraviolet-blocking opaque printed layer is provided on the entire surface of the transparent synthetic resin base layer except for the visible transparent portion. 5. A soft storage bag for tap water according to claim 4, wherein the ultraviolet-blocking opaque printed layer is provided on the entire surface of the transparent synthetic resin base material layer except for the visually transparent part and the bottom part of the bag. 7. The soft storage bag for tap water according to claim 4, wherein the ultraviolet blocking opaque printing layer is a white ink containing a white pigment and a binder. The ultraviolet-blocking opaque printed layer according to claims 4, 5, 6, and 7 has a transmittance of 0.0 in the wavelength range that promotes the decomposition of sodium hypochlorite among the ultraviolet rays that reach the earth's surface. A soft storage bag for tap water, characterized by being provided with a water content of 0.01% or less. A soft material for tap water, characterized in that a remaining water amount value obtained by actually measuring the remaining amount of tap water when the bag is suspended is applied to the edge of the visually transparent portion according to each of claims 1 to 8. storage bags. 10. The soft storage bag for tap water according to each of claims 1 to 9, characterized in that when water is filled, the bottom portion of the ship's bottom expands and becomes self-supporting.

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