JP2014128626A - Water-degradable sheet, and pouch for excrement accommodation kit with use thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-degradable sheet achieving both of water proofness and water-degradable properties, and a pouch for excrement accommodation kit with use thereof.SOLUTION: The water-degradable sheet includes at least a biodegradable substrate, an enzyme to react with the biodegradable substrate, and a surfactant having a fluoro group. The pouch for excrement accommodation kit includes an inner pouch having at least a water-degradable sheet and an outer pouch including at least non-water-degradable sheet to cover the outside of the inner pouch. The inner pouch is formed of the water-degradable sheet. The water-degradable sheet can achieve both of water proofness and water-degradable properties. The pouch for excrement accommodation kit with use of the water-degradable sheet can be fitted for use in a prescribed time and can be then discarded in a flush toilet bowl or the like.

Description

  The present invention relates to a water-decomposable sheet. The present invention also relates to a water-decomposable sheet used for treating excrement, excretory fluid, gas, exudate, and secretory fluid (hereinafter collectively referred to as “excrement”) from the human body, and the same. The present invention relates to a pouch for excreta containing equipment.

  Conventionally, when feces and urine excretion cannot be controlled by one's own will, or when there is a disease in digestive organs or urinary organs, surgical operation is performed to bring the intestinal tract and urinary tract to the body surface to the body surface A stoma is being constructed. When a stoma is constructed, an ostomy pouch is attached around the stoma in order to temporarily store excrement from the stoma.

  In addition, it is known that a drainage pouch is attached around the opening or wound to treat excrement discharged by drainage or the like even when the body surface has an opening or wound due to other diseases. Yes.

  Many improvements have been accumulated for ostomy pouches, drainage pouches and the like (hereinafter also referred to as “pouches for excrement containing devices”). Compared to the prevention of odor and the good wearability of this pouch for excrement storage equipment, there is still room for research and development in terms of processing excrement in the pouch, and the user wants further research and development.

  In order to process the excrement in the pouch, the excrement must be discharged from the pouch or scraped out from the pouch. These operations are troublesome, and during the operation, malodor due to excrement may occur or excrement may adhere to the surroundings, so excrement processing becomes an unpleasant operation. Furthermore, a certain amount of space is required to perform these operations. In addition, there is a possibility that the pouch is damaged during excrement disposal work in the pouch and the excrement leaks.

  As a method for solving the problems as described above, various techniques have been proposed in which the excrement storage device pouch is allowed to flow to the flush toilet together with the excrement as a method of processing excrement accumulated in the pouch (for example, Patent Document 1). reference).

Special table 2007-508905 gazette

However, when a pouch containing excreta is discarded in a flush toilet, it is necessary for the pouch to easily disintegrate and decompose so that the pouch does not clog a sewer pipe or a septic tank. On the other hand, when the pouch is attached and used, the wet state proceeds to contain the excrement in the pouch, but the pouch is water resistant so that the excrement does not leak even after a certain period of time. Sex is required. That is, the pouch is required to have a property that is not easily altered or damaged by moisture during use and a property that is easily dissolved in water when discarded. In reality, it is technically difficult to provide a water-decomposable sheet and a pouch for excrement accommodation equipment that satisfy both the water-decomposability and water resistance.
Therefore, the present invention has been made in view of such a situation, and intends to provide a water-decomposable sheet capable of achieving both water-decomposability and water resistance, and a pouch for excreta containing equipment using the same. It is.

  As a result of intensive studies in view of the above situation, the present inventor surprisingly surprisingly combined three types of biodegradable substrate, an enzyme that acts on the biodegradable substrate, and a fluorosurfactant. The present inventors have found that a water-decomposable sheet having good water-disintegration property when discarded in water and also having good water resistance when used can be obtained.

That is, the present invention provides a water-degradable sheet containing at least a biodegradable substrate, an enzyme that acts on the biodegradable substrate, and a surfactant having a fluoro group.
The surfactant having a fluoro group may be a surfactant having a perfluoroalkenyl group.
A hydrophilic modifier may further be included.
The hydrophilic modifier may be a hydrophilic organic solvent.
The hydrophilic organic solvent may be a compound having a glycol dialkyl ether skeleton.
The biodegradable substrate may be a biodegradable resin.
The biodegradable substrate contains at least one or two or more biodegradable resins selected from the group consisting of polycaprolactone, polylactic acid-based resin, polybutylene succinate, and polybutylene succinate adipate, Also good.
The content of the biodegradable substrate may be 15 to 91% by mass, and the content of the enzyme that acts on the biodegradable substrate may be 0.05 to 5% by mass.
The content of the surfactant having a fluoro group may be 0.1 to 8% by mass.
The content of the compound having a glycol dialkyl ether skeleton may be 5 to 30% by mass.

  Further, the present invention is a pouch for excrement containing equipment comprising an inner pouch including at least a water-degradable sheet and an outer pouch including at least a non-water-decomposable sheet that covers the outside of the inner pouch. The present invention provides a pouch for excrement accommodation equipment, comprising the water-decomposable sheet of the invention.

  ADVANTAGE OF THE INVENTION According to this invention, the water-decomposable sheet which can aim at coexistence of water-decomposability and water resistance, and the pouch for excrement accommodation equipment using the same can be provided.

The water-decomposable sheet of the present invention contains at least a biodegradable substrate, an enzyme that acts on the biodegradable substrate, and a surfactant having a fluoro group. The water-decomposable sheet of the present invention preferably contains a hydrophilic modifier.
Here, in the present invention, “water decomposability” refers to the property of disintegrating or decomposing upon contact with a water stream or a large amount of water, and a suspension that can be dissolved in water and flown into a uniform solution or sewer. It is a concept including the property of “water-soluble”.
The thickness of the water-decomposable sheet of the present invention is preferably 10 to 250 μm, more preferably 20 to 150 μm. And is preferably 5 to 100 g / ^{m 2} as a weight per unit area, 15 to 50 g / ^{m 2} is more preferable.

The biodegradable substrate is preferably one that imparts appropriate mechanical strength to the water-decomposable sheet when the water-degradable sheet is used, and that easily disintegrates or decomposes the water-decomposable sheet when the water-degradable sheet is discarded in a flush toilet or the like. .
Furthermore, the biodegradable substrate is preferably a substance that is easily decomposed by microorganisms, enzymes, or the like and has a low environmental load, and more preferably a substance that has the property of being finally decomposed into water and carbon dioxide.

  Examples of the biodegradable substrate include biodegradable resins (for example, polyester resins), polysaccharides, protein biodegradable polymers, and the like. Of these, biodegradable resins are preferable.

Examples of biodegradable resins include polylactic acid and derivatives thereof, polycaprolactone and derivatives thereof, polybutylene succinate and derivatives thereof, poly (ethylene terephthalate / succinate), poly (butylene adipate / terephthalate), poly (tetramethylene adipate / Terephthalate), polyethylene succinate, polyvinyl alcohol, and polyglycolic acid.
Examples of polylactic acid and derivatives thereof include polylactic acid resins such as polylactic acid and polylactic acid / polybutylene succinate block copolymer).
Examples of polycaprolactone and derivatives thereof include polycaprolactone and poly (caprolactone / butylene succinate).
Examples of polybutylene succinate and derivatives thereof include poly (butylene succinate / adipate), poly (butylene succinate / carbonate) and the like.

  Among the biodegradable resins, those containing at least one or two or more selected from the group of polycaprolactone, polylactic acid resin, polybutylene succinate and polybutylene succinate adipate are preferable.

Examples of the polysaccharide include cellulose, pullulan, curdlan, starch, chitin, chitosan, pectin and the like and derivatives thereof (for example, cellulose acetate, modified starch, etc.). Among these, modified starch (for example, modified esterified starch) is preferable.
The particle size of the polysaccharide is preferably 2 to 100 μm, more preferably 5 to 20 μm.

  Examples of the protein include collagen, gelatin, collagen peptide, casein, and derivatives thereof.

The biodegradable substrate may be used alone or in combination of two or more.
The water-decomposable sheet of the present invention preferably contains at least a biodegradable resin.
The content of the biodegradable substrate is preferably 15 to 91% by mass, more preferably 50 to 85% by mass, based on the total amount of the raw material of the water-degradable sheet.
The content of the biodegradable resin is preferably 20 to 80% by mass, more preferably 45 to 75% by mass, based on the total amount of the raw material of the water-decomposable sheet.
The content of the biodegradable resin is preferably 33 to 99% by mass and more preferably 60 to 85% by mass in the total amount of the biodegradable substrate.

The enzyme that acts on the biodegradable substrate is not particularly limited as long as it acts on the biodegradable substrate. The enzyme hydrolyzes or modifies the biodegradable substrate present in the water-degradable sheet, thereby facilitating the collapse or decomposition of the water-degradable sheet.
When the biodegradable substrate is a biodegradable resin (for example, a polyester-based resin), the enzyme is preferably a hydrolase, more preferably an enzyme that hydrolyzes an ester bond. Lipase, carboxyesterase, cutinase.
When the biodegradable substrate is starch or a derivative thereof, the enzyme is preferably amylase, and specific examples include α-amylase, β-amylase and glucoamylase.
When the biodegradable substrate is a protein, the enzyme is preferably a protease, and specific examples include serine protease, aspartic proteinase, metalloprotease, and thioprotease.

The enzyme may be any of a natural enzyme, an unmodified enzyme, and a modified enzyme (eg, heat resistance, enzyme activation at a low water temperature, etc.).
In addition, the method for incorporating the enzyme into the water-decomposable sheet is not particularly limited, and examples thereof include a carrier binding method (for example, a physical adsorption method, an ionic binding method, a supply binding and a biochemical specific binding method), a crosslinking method, and the like. The enzyme can be contained in the water-decomposable sheet by one or more methods selected from the inclusion method (for example, the lattice type and the microcapsule method).

Enzymes that act on biodegradable substrates may be used alone or in combination of two or more.
The amount of the enzyme used is preferably 0.05 to 5% by mass and more preferably 0.1 to 2% by mass in the total amount of the raw material of the water-degradable sheet.

Examples of the surfactant having a fluoro group (hereinafter also referred to as “fluorinated surfactant”) include anionic, nonionic, cationic and amphoteric.
The fluorine-based surfactant may have a perfluoroalkyl group composed of CF ₃ (CF ₂ ) n- in the molecule or a perfluoroalkenyl group in the molecule. The carbon number of the perfluoroalkyl group or perfluoroalkenyl group is preferably 4-30.
Of these, surfactants having a perfluoroalkenyl group are preferred. The branched chain of the fluorosurfactant is preferably a perfluoroalkenyl group.

  The perfluoroalkenyl group is preferably one represented by the general formula (1) or (2). Examples thereof include surfactants having a perfluoroalkenyl group represented by the following general formula (1) or (2).

  Examples of the anionic fluorosurfactant having a perfluoroalkenyl group include those having a functional group such as sulfonate, carboxylate, dicarboxylate and the like. Examples of the anionic fluorine-based surfactant include sodium perfluoroalkenyloxybenzenesulfonate, sodium perfluoroalkenyloxyphenylsulfonyl-N-methylcarboxylate, and the like.

As the surfactant having a perfluoroalkenyl group, a commercially available product may be purchased and used.
Examples of the anionic fluorosurfactant having a functional group having a perfluoroalkenyl group of sulfonate include, for example, Neos Co., Ltd .; FT-140A, FT-100, FT-100C, FT-110 etc. are mentioned.
FT-150, FT-150CH, FT-AK, etc. are mentioned as an anionic fluorine-type surfactant in which a functional group has the perfluoroalkenyl group of carboxylate.
FT-501 etc. are mentioned as an anionic fluorine-type surfactant in which a functional group has the perfluoroalkenyl group of dicarboxylate.
Examples of the nonionic fluorosurfactant having a perfluoroalkenyl group include those whose functional group is polyoxyethylene or the like. Examples of the nonionic fluorosurfactant include α-perfluorononenyloxy-ω-methylpolyethylene oxide.
As a cationic fluorosurfactant having a perfluoroalkenyl group, this functional group is a quaternary ammonium salt (for example, FT-320, FT-310 (CAS No. 59493-72-0), FT-300, etc.) And the like. Examples of the cationic fluorine-based surfactant include halogenated (for example, bromide, iodide, etc.) fluoroalkyltrialkylammonium. For example, 1- [3- [4-((heptadecafluorononyl) oxy) -benzamido] propyl] -N, N, N-trimethylammonium iodide is preferred.
Examples of the zwitterionic fluorosurfactant having a perfluoroalkenyl group include those whose functional group is betaine (for example, FT-400S, FT-400SW, etc.). Examples of the amphoteric fluorine-based surfactant include fluoroalkylbetaine.
Among these, it is preferable to use a cationic fluorine-based surfactant having a perfluoroalkenyl group.

  Moreover, for example, a surfactant having a perfluoroalkenyl group represented by the following general formula (3) can be mentioned. JP-A-2006-335677 can be referred to as an example of a fluorosurfactant, but is not limited thereto.

In general formula (3), Y represents at least an alkyl group, an oxygen atom (O) or a sulfur atom (S) which may have a substituent having 1 to 30 carbon atoms (preferably 1 to 15 carbon atoms). It represents a group having one or a direct bond connecting Ars.
When Y is an alkyl group, it may be an alkyl group substituted by a halogen atom such as Cl or F, but may be an unsubstituted alkyl group. In the case of a group having at least one Y, an oxygen atom (O) or a sulfur atom (S) is preferable.

In general formula (3), X is the same or different and represents an oxygen atom (O) or a sulfur atom (S).
In general formula (3), Rf represents a perfluoroalkenyl group. Examples of the perfluoroalkenyl group include the above-described general formulas (1) and (2).
In general formula (3), a is an integer of 0 or 1, c is an integer of 1 or more, c is 1 when a is 0, and c is 2 or more when a is 1. b is an integer of 1 or more (preferably 1 to 4).

In general formula (3), Ar represents aromatic.
In the general formula (3), when the aromatic is a benzene ring, a is 1, and Y is —SO ₂ —, —C (CH ₃ ) ₂ —, or a direct bond connecting Ars, or When the aromatic is a benzene ring, a is 0, X is an oxygen atom (O) and b is 1 or 2, or X is a sulfur atom (S) and b is 1, In the case where at least one substituent is present, the aromatic is a naphthalene ring, a is 0, and b is 1, the aromatic has one or more substituents.
The aromatic substituent represented by Ar is not particularly limited, but includes a halogen atom, and an alkyl group, an alkenyl group, an alkynyl group, an alkoxyl group, a cyano group, a nitro group, and an amino group substituted by a halogen atom. Can be mentioned.

A fluorine-type surfactant may be used individually by 1 type or in combination of 2 or more types.
The amount of the fluorosurfactant used is preferably from 0.1 to 8% by mass, preferably from 0.1 to 3% by mass, more preferably from 0.3 to 1.5%, based on the total amount of the raw material for the water-degradable sheet. It is mass%, More preferably, it is 0.4-1.0 mass%.

An additive can further be mix | blended with the water-decomposable sheet of this invention.
Examples of additives include hydrophilic modifiers, waxes, polyhydric alcohols, plasticizers / lubricants, surfactants (excluding fluorine-based compounds), higher alcohols and fatty acids.
Furthermore, you may mix | blend suitably other adjusters, such as a filler and a pH adjuster, with the water-degradable sheet | seat of this invention in the grade which does not impair the objective of this invention.
You may use these individually or in combination of 2 or more types.
The content of the additive is preferably 2 to 65% by mass and more preferably 4 to 30% by mass in the total amount of the raw material of the water-decomposable sheet.

It is preferable to further include a hydrophilic modifier in the water-decomposable sheet of the present invention.
A hydrophilic modifier means what has a property which makes it easy to draw water from the outside in the biodegradable substrate which exists in a water-degradable sheet | seat. Or what has the property to provide hydrophilic property to the component which is hydrophobic.

The hydrophilic modifier is not particularly limited as long as it is a hydrophilic modifier that can be usually used for medical purposes, but a hydrophilic organic solvent is preferable.
Hydrophilic refers to the physical characteristics of chemical species and substituents that have an affinity for water. Hydrophilic organic solvents are organic compound solvents that are more soluble in water than oils and hydrophobic solvents. It is.
Examples of the hydrophilic organic solvent include a liquid material having a polyoxyalkylene group, which is a hydrophilic organic liquid material, and examples thereof include a compound having a polypropylene glycol skeleton and a compound having a glycol dialkyl ether skeleton. . Of these, hydrophilic organic liquid substances are preferable, liquid substances having a polyoxyalkylene group are more preferable, and compounds having a glycol dialkyl ether skeleton are more preferable. Further, when the hydrophilic organic solvent has an alkylene glycol structure, this repetition is preferably 1 to 20, more preferably 1 to 5, and further preferably 1 to 3.
The HLB of the hydrophilic organic liquid substance is preferably 10 to 20, and the sp value (solubility parameter) is preferably 6 to 11.

The compound having a glycol dialkyl ether skeleton is glycol dialkyl ether or a derivative thereof. Further, as a compound having a glycol dialkyl ether skeleton, the terminal hydroxyl group of mono- or polyethylene glycol such as ethylene glycol, diethylene glycol, or triethylene glycol is substituted with a linear, branched, or cyclic alkyl group. A compound having a plurality of ether groups therein. The ethylene glycol substituted with the terminal hydroxyl group is preferably mono to tri ethylene glycol. The alkyl group is an alkyl group that may have a substituent, and the alkyl groups of the compound may be the same or different. Examples of the alkyl group having a substituent include an alkyl group having an unsaturated chain hydrocarbon group (for example, a 2-propenyl group (allyl group), an isopropenyl group, etc.) and the like. Moreover, carbon number of this alkyl group becomes like this. Preferably it is 1-4. For example, Polyethylene Glycol Allyl Methyl Ether is suitable.
The HLB of the compound having a glycol dialkyl ether skeleton is preferably 10-20.
The sp value (solubility parameter) of the compound having a glycol dialkyl ether skeleton is preferably 6 to 11.

  Examples of compounds having a glycol dialkyl ether skeleton include ethylene glycol dimethyl ether, triethylene glycol dimethyl ether, diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, dipropylene glycol dimethyl ether, and triethylene glycol methyl 2-propenyl ether. And derivatives thereof. From these, one or more can be selected.

  The content of the hydrophilic modifier is preferably 5 to 30% by mass, more preferably 10 to 25% by mass, and further preferably 12 to 20% by mass in the total amount of the raw material of the water-degradable sheet. When using a hydrophilic modifier, the upper limit of the content of the additive is preferably 7% by mass or more, more preferably 20% by mass or more, preferably 50% by mass, based on the total amount of the raw material of the water-degradable sheet. It is at most 40% by mass, more preferably at most 40% by mass.

  Examples of plasticizers and lubricants include phthalate plasticizers, trimellitate plasticizers, fatty acid plasticizers, epoxy plasticizers, adipate plasticizers, polyester plasticizers, fatty acid amide lubricants, fatty acid / alcohol additives, Examples thereof include those having a plasticizing action such as montan wax and fluorine-modified polymer. Of these, montan wax, polyhydric alcohol additives, fluorine-modified polymers, and organic acid monoglycerides are preferred.

  Examples of montan wax include montanic acid wax, montanic acid partially saponified ester wax, and montanic acid ester wax.

Examples of the polyhydric alcohol include glycerin, fatty acid polybasic acid ester, aliphatic polyhydric alcohol ester, oxyacid ester, and rosin derivative.
The organic acid monoglyceride is obtained by further esterifying an organic acid to the hydroxy group of the monoglyceride. Examples of the organic acid monoglyceride include acetic acid monoglyceride, citric acid monoglyceride, diacetyltartaric acid monoglyceride, and lactic acid monoglyceride. Of these, acetic acid monoglyceride is preferable, and glycerin diacetomonolaurate is more preferable.
From these, one or more can be selected.

Although it does not specifically limit as a manufacturing method of the water-decomposable sheet of this invention, An example is given to the following.
The water-decomposable sheet of the present invention can be produced by heating and mixing the above-described raw materials and rolling. The heat mixing is preferably performed at 50 to 100 ° C. The heating and mixing is preferably performed in a two-stage process. Specifically, the raw materials other than the enzyme are heated and mixed at 80 ° C. or higher, and the temperature is lowered to about 60 ° C. or lower to form a biodegradable substrate. It is preferred to add and mix the acting enzyme. In the case of a fine powder enzyme, it can be performed in a single step, and specifically, it may be mixed with other raw materials by heating before lowering the temperature.
After the raw materials are heated and mixed, the temperature is lowered to about 25 ° C., the kneaded product is taken out, heated / rolled to 60 ° C. with a rolling mill to form a sheet of 50 to 100 μm, and used as a water-decomposable sheet.

In addition, a water-degradable paper and / or a water-decomposable resin film is laminated on the sheet of the kneaded material under a heated (preferably 40 to 65 ° C.) condition to form a sheet and used as a water-degradable sheet. It is preferable.
By laminating water-decomposable paper and / or water-decomposable resin film, it can be more easily dissolved when discarded in a flush toilet or the like.
The water-decomposable paper and / or water-decomposable resin film may be any substance that dissolves or disperses the constituent fibers and / or resin by stirring with water such as hot water or cold water. Paper is meant to include non-woven fabrics.
The thickness of the water-decomposable paper and / or water-decomposable resin film is preferably 3 to 150 μm, more preferably 10 to 80 μm.

The pouch for excrement accommodation equipment of the present invention is composed of the water-decomposable sheet of the present invention. The water-decomposable sheet of the present invention has water resistance within a certain period of time during normal life or action, and has the property of being hydrolyzed / disintegrated by contact with a large amount of water such as running water such as a flush toilet. As described above, the water-decomposable sheet has an excellent disintegration property that does not cause a problem such as clogging of pipes when it is dumped in a flush toilet or the like and flowed. Furthermore, the water-decomposable sheet of the present invention can be provided with a fragile portion such as a groove that easily collapses due to water flow. Therefore, the pouch for excrement accommodation equipment of the present invention using the water-decomposable sheet is excellent in usability and discardability.
The water-decomposable sheet of the present invention or a sheet containing this as a layer is used as a pouch, provided with an opening corresponding to the stoma, and configured to be attached to a face plate.
The structure of the pouch for excrement accommodation equipment of the present invention is not particularly limited, and may be a known one. For example, when a coupling member is provided for mounting on a face plate, and this coupling member is discarded in a washing tray or the like It may be removable from the pouch.
Moreover, it is good also as what attaches | stacks on the coupling | bond part of an outer bag and a face plate, without providing a coupling member. Furthermore, you may adhere | attach to a face plate and remove with an outer bag.

Preferably, the pouch for excrement containing equipment according to the present invention comprises: an inner pouch including at least a water-decomposable sheet; and an outer pouch including an outer sheet including at least a non-hydrolyzable sheet that covers the outside of the inner pouch. It is a pouch for excrement containing appliances configured, and the inner pouch is composed of the water-decomposable sheet of the present invention described above.
The pouch for excrement accommodation equipment of the present invention has an opening corresponding to the stoma and a structure that can be attached to the face plate, and is a non-water-decomposable sheet for deodorization and safety (for example, a non-water-decomposable plastic film). The non-water-decomposable pouch comprising the outer bag (outer pouch) can be used as an inner bag (inner pouch) mounted in a double or more multiple.
In the case of a multilayer pouch structure in which a non-water-decomposable pouch composed of a non-water-decomposable sheet is covered on the outside of a water-degradable pouch composed of the water-degradable sheet of the present invention described above, the inner pouch can be detached. It becomes possible. This allows the outer pouch to be used repeatedly by discarding only the inner pouch.

In the present invention, the water-decomposable inner pouch can be used for a certain period of time (about 8 hours) even if it is in contact with the excrement. Since it can be discarded, it is hygienic. Further, the outer pouch is good in terms of hygiene because the inner pouch has good water resistance, so that it does not come into contact with excrement and is non-hydrolyzable so that it can be washed. And the pouch for excrement accommodation appliances of the present invention can suppress the user's use cost and is economical. In addition, the multilayer pouch structure is more economical in terms of cost of use by adopting a two-layer pouch structure.
Furthermore, for example, a weak portion such as a groove may be provided at an arbitrary position of the pouch for excrement accommodation equipment so as to be more easily collapsed by a water flow such as a flush toilet.

According to this configuration, since only the inner pouch can be removed, the outer pouch can be used repeatedly, which is economical. Moreover, since the frequency | count of attachment / detachment of the excrement accommodation equipment fixed to the skin with the adhesive decreases, even a person with weak skin can alleviate irritation.
Furthermore, if the excrement becomes liquid due to physical condition, the excrement can be prevented from leaking out by the external pouch even when the water-decomposable sheet collapses.

The water-decomposable sheet of the present invention can be applied to uses other than the pouch for excrement accommodation equipment described above. Moreover, it is also possible to make the water-decomposable sheet of the present invention into a desired three-dimensional shape as necessary.
Although the illustration of uses other than the pouch for excrement accommodation equipment mentioned above is demonstrated below, the water-disintegratable sheet | seat of this invention is not limited to this illustration.
For example, the water-decomposable sheet of the present invention may be used as an adhesion preventing film. Thereby, it is possible to prevent adhesion between organs in surgery or the like. In addition, since the water-decomposable sheet can be disassembled in the body, it is possible to save the burden on the patient's body while reducing the burden on the patient's body by eliminating the trouble of taking out the anti-adhesion membrane by re-operation.

In addition, the water-decomposable sheet of the present invention may be used for etiquette bags (for example, vomiting bags), simple toilets in the event of a disaster, diaper sheets, and the like. Thereby, excrement etc. can be processed simply.
Furthermore, the water-decomposable sheet of the present invention may be used as an excrement collection tool used for pet walks. Thereby, the owner can perform the excrement processing of the pet together with the water-decomposable sheet.
Furthermore, the water-decomposable sheet of the present invention may be used as a paper sheet or a processing sheet such as a pus basin or a pot used at the time of waste disposal in a hospital.
Furthermore, the water-decomposable sheet of the present invention can also be used as a member such as a diaper that is used for incontinence of sanitary products, urine, feces and the like. Thereby, the user can discard the diaper etc. which have a water-decomposable sheet in a toilet, and can process it simply.

As described above, the product using the water-decomposable sheet according to the present invention can be used for normal life or action for a certain period of time by wearing or using the sheet, and thereafter, it is troubled by a flush toilet or the like. Can be disposed of without disposal.
And since the water-degradable sheet | seat of this invention and a product using the same decompose | disassemble in water, it can be poured into a flush toilet etc. as it is, and a waste can be processed easily. Moreover, since it can be poured as it is into the flush toilet, it is possible to easily perform work such as replacement even in a narrow space (for example, a public toilet).

  Hereinafter, examples and comparative examples will be given to specifically describe the present invention, but the present invention is not limited to the examples. In the examples, unless otherwise specified, parts and% are based on mass.

Each specific evaluation method of the water disintegratable sheet is as follows.
<Measurement method of breaking strength>
The breaking strength was measured by a method in accordance with JIS K 7161 “Plastics—Test Method for Tensile Properties”.
Eight test pieces each having a width of 25 mm and a length (for example, 120 mm) that can make the holding interval 40 mm are collected from each sample. Each of the four test pieces was pulled to such an extent that no slack was generated, and attached to a tensile tester (Instron, trade name “INSTRON 5564”, using load cell type 2525-806 1 kN) with a gripping interval of 40 mm, and a temperature of 23 A load is applied at a tension rate of 200 mm / min under the conditions of ° C. and humidity of 65% RH until the test piece is cut. The maximum load at this time is defined as the breaking strength (unit: N).

  Next, 1 g of a seeding agent for septic tank (Hypolka K manufactured by Shikoku Kasei Kogyo Co., Ltd .: seeding agent for anaerobic tank) is added to 1 liter of tap water, and 300 ml of test water adjusted to a water temperature of 20 degrees is prepared. The remaining four test pieces are allowed to settle down due to their own weight, or are left to stand still in the test water for 48 hours. After 48 hours, the test piece is taken out from the test water, the surface is rinsed with running water, the surface water is blotted with a tissue, and then left to stand for 48 hours under conditions of a temperature of 23 ° C. and a humidity of 65% RH. Thereafter, the load is applied until the test piece is cut as described above, and the maximum load is measured.

<Durability test>
The surface of the water-decomposable sheet when 130 g of artificial stool is put in a test pouch made from each sample and the upper opening is sealed and kept in an atmosphere of a temperature of 34 ° C. and a humidity of 97% for 8 hours. Observe the occurrence of tears due to water impermeability, seal breakage, and pouch rupture, and make the following criteria.
○: None of the samples show surface bleeding, rupture or damage to the heat seal part.
Δ: No ruptured sample, but surface exudation occurs in one or more samples.
X: Burst occurred in at least one sample.

Example 1
As shown in Table 1, 61.8% by mass of polycaprolactone, 28.8% by mass of modified esterified starch, 0.82% by mass of cationic fluorosurfactant, 2.90% by mass of glycerin, and a complex ester of montanic acid 4.12% by mass of wax and 0.82% by mass of acrylic skeleton fluorine-modified polymer were kneaded at 60 ° C. for 20 minutes, further heated to 95 ° C. and kneaded for 5 minutes. The temperature was lowered to 60 ° C. while kneading, and then allowed to stand for 10 minutes. And what diluted 0.12 mass% of lipase with 0.62 mass% of polyethylene glycol was added, knead | mixed for 5 minutes, and after temperature-falling to 25 degreeC, the kneaded material was obtained.
This kneaded product is formed into a film having a thickness of 70 μm using a rolling mill at a temperature of 60 ° C., and then pasted on one side of a water-soluble paper having a weight of 30 g / m ² and a thickness of 65 μm with a laminator at a temperature of 70 ° C. In addition, a test pouch sheet (Example 1) was prepared.
The lipase used was dissolved in polyethylene glycol to a concentration of 20%.

Example 2
A kneaded material was obtained in the same manner as in Example 1 except that the fluorosurfactant shown in Table 1 was replaced with 0.82% by mass of a tergent 300 (cationic), and further used for testing in a rolling mill. A pouch sheet (Example 2) was prepared.

Example 3
The fluorosurfactant shown in Table 1 was replaced with Surflon S-221 (cationic). A kneaded product was obtained in the same manner as in Example 1 except that Surflon S-221 was replaced with 2.66% by mass for concentration adjustment, and a test pouch sheet (Example 3) was further obtained using a rolling mill. )created.

Example 4
A kneaded material was obtained in the same manner as in Example 1 except that the fluorosurfactant shown in Table 1 was replaced with 0.82% by mass of Surflon S-243 (nonionic), and further tested in a rolling mill. A pouch sheet (Example 4) was prepared.

Example 5
A kneaded material was obtained in the same manner as in Example 1 except that the fluorosurfactant shown in Table 1 was replaced with 0.82% by mass of F-410 (anionic), and further for testing in a rolling mill. A pouch sheet (Example 5) was prepared.

Example 6
As shown in Table 1, a compound having a glycol dialkyl ether skeleton was further contained as a raw material. At this time, “14.14% by mass of a compound having a glycol dialkyl ether skeleton, 53% by mass of polycaprolactone, 28.8% by mass of modified esterified starch, 0.71% by mass of a cationic fluorosurfactant, and 2.46 of glycerin. A kneaded product was obtained in the same manner as in Example 1 except that the raw materials of “mass%, montanic acid complex ester wax 3.54% by mass, and acrylic skeleton fluorine-modified polymer 0.71% by mass” were kneaded. A test pouch sheet (Example 6) was prepared using a rolling mill.

Example 7
As shown in Table 1, 60.52% by mass of polycaprolactone, 15.93% by mass of modified esterified starch, 0.64% by mass of cationic fluorosurfactant, 1.59% by mass of glycerin, and a complex ester of montanic acid 4.78% by mass of a wax, 0.64% by mass of an acrylic skeleton fluorine-modified polymer, 0.61% by mass of a fine powder lipase, and 15.29% by mass of a compound having a glycol dialkyl ether skeleton were kneaded at 60 ° C. for 20 minutes. The temperature was raised to 95 ° C. and kneaded for 5 minutes. The temperature was lowered to 60 ° C. while kneading, and then allowed to stand for 10 minutes. After the temperature was lowered to 25 ° C., a kneaded product was obtained. Since fine powder lipase was used, it was heated and mixed with other ingredients without using an enzyme diluent.
A kneaded material was obtained in the same manner as in Example 1, and a test pouch sheet (Example 7) was prepared with a rolling mill.

Comparative Example 1
As shown in Table 1, except for the lipase which is the raw material of Example 1, “polycaprolactone 53.1% by mass, modified esterified starch 24.8% by mass, fluorosurfactant 0.71% by mass, glycerin 2 .45 mass%, montanic acid complex ester wax 3.54 mass%, and acrylic skeleton fluorine-modified polymer 0.71 mass% "were kneaded in the same manner as in Example 1 to obtain a kneaded product. Further, a test pouch sheet (Comparative Example 1) was prepared with a rolling mill.

Comparative Example 2
As shown in Table 1, except for the fluorosurfactant which is the raw material of Example 1, “polycaprolactone 53.4% by mass, modified esterified starch 24.9% by mass, glycerin 2.54% by mass, montanic acid A mixed product was obtained in the same manner as in Example 1 except that the raw materials of 3.56% by mass of the composite ester wax and 0.71% by mass of the acrylic skeleton fluorine-modified polymer were kneaded, and further tested in a rolling mill. A pouch sheet (Comparative Example 2) was prepared.

The strength change rate is a ratio of change in break strength before and after immersion in test water based on the above-described measurement of break strength, and is obtained from the following formula (1).

  It shows that the above-mentioned intensity | strength change rate is so large that the water-decomposable sheet has decomposed | disassembled and disintegrated by immersion.

Thus, by including a combination of a biodegradable substrate such as polycaprolactone and modified esterified starch, an enzyme that acts on a biodegradable substrate such as lipase, and a surfactant having a fluoro group, A water-decomposable sheet having both water resistance and water-decomposability could be obtained. Polycaprolactone can be classified as a biodegradable resin, and modified esterified starch can be classified as a biodegradable polysaccharide.
Furthermore, by incorporating a hydrophilic modifier such as a compound having a glycol dialkyl ether skeleton into four combinations, a water-decomposable sheet that can dramatically improve both water resistance and water-decomposability can be obtained. It was.

Examples 8-12
A kneaded product was obtained in the same manner as in Example 6 except that the compound having a glycol dialkyl ether skeleton (dialkyl ether type) used in Example 6 was replaced with DMG, and a test pouch sheet ( Example 8) was prepared.
Further, except that the compound having a glycol dialkyl ether skeleton used in Example 6 was changed in the order of DMTG, DMDG, MEDG, and DEDG, a kneaded product was obtained in the same manner as in Example 6, and further in a rolling mill. Test pouch sheets (Examples 9 to 12) were prepared.

Claims (11)

  A hydrolyzable sheet comprising at least a biodegradable substrate, an enzyme that acts on the biodegradable substrate, and a surfactant having a fluoro group.   The water-decomposable sheet according to claim 1, wherein the surfactant having a fluoro group is a surfactant having a perfluoroalkenyl group.   The water-decomposable sheet according to claim 1 or 2, further comprising a hydrophilic modifier.   The water-decomposable sheet according to claim 3, wherein the hydrophilic modifier is a hydrophilic organic solvent.   The water-decomposable sheet according to claim 4, wherein the hydrophilic organic solvent is a compound having a glycol dialkyl ether skeleton.   The water-decomposable sheet according to any one of claims 1 to 5, wherein the biodegradable substrate is a biodegradable resin.   2. The biodegradable substrate contains at least one or two or more biodegradable resins selected from the group consisting of polycaprolactone, polylactic acid resin, polybutylene succinate, and polybutylene succinate adipate. The water-decomposable sheet according to any one of -6.   The content of the biodegradable substrate is 15 to 91% by mass, and the content of the enzyme that acts on the biodegradable substrate is 0.05 to 5% by mass. Water disintegratable sheet.   The water-decomposable sheet according to any one of claims 1 to 8, wherein the content of the surfactant having a fluoro group is 0.1 to 8% by mass.   The water-decomposable sheet according to any one of claims 5 to 9, wherein the content of the compound having a skeleton of glycol dialkyl ether is 5 to 30% by mass. A pouch for excrement containing equipment comprising: an inner pouch including at least a water-decomposable sheet; and an outer pouch including at least a non-water-decomposable sheet covering the outside of the inner pouch,
An inner pouch is made of the water-decomposable sheet according to any one of claims 1 to 10, wherein the pouch for excrement accommodation equipment is provided.