JPH0134065B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a body fluid treatment article, and more specifically, a water-absorbent article for treating body fluids such as menstrual blood and urine.
The company aims to provide body fluid treatment products such as napkins, tampons, and diapers with excellent water retention and safety. Traditionally, absorbents for body fluid treatment products such as napkins, tampons, and diapers have been made of rayon, cotton,
Hydrophilic fibers such as pulp and synthetic products such as urethane foam have been used or proposed, but although these materials generally have water absorption properties, their water retention is insufficient, especially when pressure is applied. Water retention is extremely low when In order to solve these drawbacks, methods have been proposed and used in which powders of various superabsorbent polymer materials are dispersed or included in the water absorption layer. Because the material is hydrophilic in nature, it has a tendency to leach into body fluids, which poses a safety issue, and this problem is especially important when the material is inserted into the body, such as in a tampon. Become. On the other hand, a body fluid treatment product that incorporates a highly water-absorbent material into a general urethane foam and has excellent water retention under external pressure has been proposed, for example, in JP-A-51-75796. The super absorbent material used in the product is a modified starch, so it lacks affinity with hydrophobic urethane foam, and when used, the super absorbent material tends to elute into body fluids, and since it is a natural product, it is susceptible to bacteria. It has a tendency to promote breeding, and since the base material is hydrophobic polyurethane, the rate of water absorption is poor. This is a serious problem in terms of hygiene, safety, and functionality, especially when the device is used by being inserted into the body like a tampon. As a result of intensive research to solve the above-mentioned drawbacks of the prior art, the inventors of the present invention used a specific urethane foam and adopted a specific material as a water-absorbing material included in the urethane foam. The present invention was completed based on the finding that the above-mentioned drawbacks can be solved. That is, the present invention provides a body fluid treatment article comprising a water-absorbing member made of a hydrophilic polyurethane foam and a water-absorbing material uniformly dispersed in the foam, wherein the water-absorbing material has a hydrophobic segment and a hydrophilic segment. This body fluid treatment article is a block and/or graft copolymer consisting of a hydrophilic polyurethane foam, and the polyol that produces the hydrophilic polyurethane foam is a hydrophilic polyol.It has excellent water absorption and water retention properties, hygiene, safety, and functionality. To explain the present invention in detail, the present invention uses
The water-absorbing material that mainly characterizes the present invention is a block copolymer and/or a graft copolymer, and has a hydrophobic segment and a hydrophilic segment in its structure. These include α-methylstyrene-based, polyethylene-based, polypropylene-based, polyacrylonitrile-based, polyurethane-bonded systems, polyester-based polymers containing aromatic rings, polyamide-based polymers, polyhalogenated vinyl-based polymers, and the like.
This segment has a strong tendency to form a crystalline phase or agglomerated phase in the water-absorbing material used in the present invention at a temperature below the softening point, and when a hydrophilic segment having a hydrophilic group absorbs water, or in water. It also acts as a constraining phase that limits the tendency to dissolve. A hydrophilic segment is a polymer that has an anionic or cationic hydrophilic group in its structure, and can be added to a hydrophilic segment by polymerizing monomers that have these hydrophilic groups or adding hydrophilic segments to a polymer that does not have a hydrophilic group. It is formed by introducing a group. The backbone polymer structure of this hydrophilic segment includes a carbon chain, an ester bond chain, an amide bond chain, a urethane bond chain, etc., but a carbon chain is preferable from the viewpoint of water resistance, chemical resistance, etc. The hydrophilic segment having such hydrophilicity strongly absorbs water and retains water because the hydrophilic group is ionic,
Although it has a strong tendency to dissolve in water, the restraining action of hydrophobic segments prevents it from dissolving, so it absorbs water and swells significantly, but it does not dissolve or leach out in water. There is no
Its shape is retained. The hydrophilic groups of such hydrophilic segments include, for example, anionic groups such as sulfonic acid groups, carpoxyl groups, sulfuric acid ester groups, phosphoric acid ester groups, polyethylene oxide sulfate groups, polyethylene oxide phosphate groups, or their like. alkali metal salts,
Lower amine salts such as ammonium salts, trimethylamine, triethylamine, and morpholine; alkanolamine salts such as monoethanolamine, diethanolamine, triethanolamine, dimethylethanolamine, diethylethanolamine, and N-methyldiethanolamine; and alkaline earth salts such as sulfonic acid groups. Metal salts, etc., and cationic groups include primary, secondary, tertiary amino groups, quaternary ammonium groups, and their mineral salts such as hydrochlorides, sulfates, nitrates, and phosphates, sulfate salts, and propionic acid salts. These include organic acid salts such as acid salts, oxalates, p-toluenesulfonates, and xylene sulfonates. The outline of the method for manufacturing the water-absorbing material described above is as follows. (1) For example, (polystyrene) (--polybutadiene)
Block copolymers and/or graft copolymers having a reactive group (double bond in the case of polybutadiene) in a segment bonded to a hydrophobic segment, such as block copolymers and (polystyrene) (--polybutadiene) (-- polystyrene) block copolymers. A method of modifying by reacting with a reactant containing an anionic group or a cationic group. (2) For example, a method of block and/or graft polymerization of a monomer and/or oligomer that forms a hydrophobic segment to a polymer or copolymer having a hydrophilic group as described above. (3) A method in which a polymer having a hydrophilic group is bonded to a polymer serving as a hydrophobic segment to form a block and/or graft copolymer. etc. The water-absorbing material used in the present invention is composed of a combination of a hydrophobic segment and a hydrophilic segment as described above, and the average molecular weight of each of these segments is about 1000 or more, preferably 3000 or more,
The composition ratio of both is 5 to 95% (by weight) of hydrophobic segment to hydrophilic segment: 95 to 5%. The degree of hydrophilicity of the resulting water-absorbing material can also be changed by changing this composition ratio. The water-absorbing material used in the method of the present invention as described above has hydrophobic segments in its structure that easily form crystal phases, so even if it absorbs a large amount of water as it is, it will not dissolve in water. However, in order to improve shape retention in water, it may be crosslinked to some extent by physical or chemical methods. The degree of crosslinking is determined by considering the balance between water absorption and shape retention, and depending on the degree of crosslinking, the water absorption amount can be varied from several times its own weight to several hundred times. There are various types of water-absorbing materials as described above, depending on the combination of the hydrophobic segment (A segment) and the hydrophilic segment (B segment).
Any type can be used in the present invention, but the most preferable one is ABA type, and others include AB type, (A)nB type (n is 3 or more), and BAB type.
Molds etc. can also be used. Since all of these water-absorbing materials are insoluble in water and organic solvents, they are preferably used in powder form with a particle size of about 50 mesh or less, preferably about 150 mesh or less. . The amount of water-absorbing material used in the present invention ranges from about 0.5 to 100 parts by weight, preferably from about 1 to 50 parts by weight, per 100 parts by weight of the total amount of polyol and polyisocyanate used to produce the polyurethane foam. . Various properties such as water absorbency, water retention, shape retention, etc. of the water absorbent member obtained can be arbitrarily changed by changing the amount of the water absorbent material used. The hydrophilic urethane foam used in the present invention is different from conventional general hydrophobic urethane foams. Such hydrophilic urethane foams are produced by using hydrophilic polyols instead of polyols in the production of conventional hydrophobic urethane foams and reacting them with polyisocyanates in the presence of blowing agents, catalysts, and other necessary components. , which can be obtained in the same manner as the conventional method. Preferred examples of such water-soluble or hydrophilic polyols include polyethylene glycol obtained by polymerizing ethylene oxide using a polyol or polyamine such as ethylene glycol, glycerin, sorbitol, pentaerythritol, sucrose, or ethylene diamine as a polymerization initiator; These include block copolymers of polyethylene glycol and polyalkylene glycol containing % by weight of polyethylene glycol, random copolymers of ethylene oxide and alkylene oxide, and polyester polyols obtained from the above-mentioned polyols and polyhydric carboxylic acids. Such hydrophilic polyols can be used alone or as a mixture, and various hydrophobic polyester polyols and polyether polyols used in the production of conventional urethane foams can also be used in small amounts, that is, the hydrophilic polyols of the polyurethane foam in the present invention. They can be used together in amounts that do not interfere with sex. The polyisocyanate to be reacted with the polyol as described above is a polyisocyanate used in the production of conventional flexible urethane foams, such as phenylene diisocyanate, tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, hexamethylene diisocyanate. ,
Any conventionally known polyisocyanate such as isophorone diisocyanate can be used. In addition, any catalysts and blowing agents that are used in the conventional production of flexible urethane foams can be used. For example, typical examples of catalysts include organic amines and organic tin compounds; Typical examples of the agent include water and a haloalkane with a low boiling point. In addition, various modifiers, colorants, and additives used in the production of conventional flexible polyurethane foams can be used as necessary. Next, preferred embodiments of the method for manufacturing a water absorbent member of the present invention using the various materials described above will be described. (b) Stir and mix the necessary components such as the water-absorbing material powder, polyol, foam stabilizer, catalyst, and blowing agent to uniformly disperse the water-absorbing material powder, then add the required amount of polyisocyanate, and After high speed mixing for 5 to 60 minutes or more, preferably
Leave it for 15 to 30 minutes to gel and harden, and then
A method of heating to 60-120°C, preferably 80-100°C to complete the reaction and obtain urethane foam. (b) Add water-absorbing material powder to the prepolymerized product of polyol and polyisocyanate, stir and mix to disperse uniformly, then add the remaining polyol, polyisocyanate, foam stabilizer, catalyst, blowing agent, etc., and heat at high speed. A method of obtaining urethane foam by mixing and following the same procedure as above. Any other conventionally known method can be used, but it is important to uniformly disperse the water-absorbing material powder, so in any case, it is necessary to add the water-absorbing material powder while the raw material is in a liquid state. Further, the foaming ratio is preferably about 50 to 10 times. The soft urethane foam used as the water-absorbing member in the present invention obtained as described above includes:
Because of the water-absorbing material present in it, it has very good water absorption properties, and even when subjected to external forces, it retains a considerable amount of water and has excellent water retention. Furthermore, although the water-absorbing material used in the present invention is hydrophilic, it contains a hydrophobic segment in its structure, so it does not integrate with the hydrophobic portion of the soft urethane foam that is the medium. Even if water is absorbed for a long time or repeatedly,
The water-absorbing material does not decompose or elute into water or come off, and has excellent durability. For such a water absorbent member of the present invention,
When using conventional general water-absorbing materials,
Such excellent durability cannot be obtained. Furthermore, in the present invention, in the production of the water-absorbing member as described above, selection of a material with higher water absorption, its usage amount, selection of a more hydrophilic polyol, its usage amount, selection of expansion ratio, crosslinking agent, etc. By changing various conditions such as the selection of salt and the amount used, it is possible to absorb and retain body fluids containing a large amount of salt, such as menstrual blood and urine, and maintain its shape. The water-absorbing member may be made of polyurethane foam that easily disintegrates in normal water. The manufacturing conditions for obtaining such a water-disintegrating water-absorbing member cannot be unconditionally specified, but as mentioned above, by selecting the types and amounts of various raw materials used, those skilled in the art can can be easily determined. If such a water-disintegrating absorbent member is used, the body fluid treatment article of the present invention can be easily disposed of in water after use, which is very advantageous. The above-mentioned water-absorbing member is combined with other members, particularly an exterior member, to produce the body fluid treatment product of the present invention, and such exterior materials may be conventionally known exterior materials for similar purposes, such as sanitary napkins. , for disposable diapers, waterproof materials, liquid-permeable non-woven fabrics, etc.
In sanitary tampons, these are liquid-permeable sheets and pull-out strings. The body fluid treatment article of the present invention is composed of the water-absorbing member and the exterior member as described above, and can be in various shapes depending on the purpose of use. , oval shape,
Shape and size such as spherical, cup-shaped, stacked or folded sheets, or chips, packaged with a liquid-permeable exterior material, attached with a drawstring, and easily inserted into the body with an applicator. do. The liquid-permeable nonwoven fabric is not particularly limited, but is made of, for example, polyester fiber. When used as a napkin for menstrual blood treatment, use a sheet of appropriate size and thickness, or stack multiple sheets to form a water-absorbent material, and place a waterproof sheet on the outer surface of the napkin. Furthermore, the entire product is packaged with a liquid-permeable exterior member. Furthermore, when used as a sweat-absorbing material for diapers or beds, it is formed into a sheet of an appropriate shape, and the other configuration is the same as that of the above-mentioned napkin. Furthermore, when using it, it can also be used in combination with conventionally known water-absorbing materials such as rayon, cotton, and the like. As described above, the body fluid treatment article of the present invention basically consists of a water-absorbing member and an exterior member, and in particular, the water-absorbing member is made of a specific water-absorbing material and a hydrophilic polyurethane foam. The water-absorbing material contains no water-soluble moieties and is therefore integrated in the polyurethane.
Even if it comes into contact with body fluids, the urethane foam does not elute into body fluids, so it is safe to use. Furthermore, unlike conventional natural products such as modified starch and modified cellulose, the water-absorbing material used does not promote the growth of bacteria in the body, so it is safe in this respect as well. Further, since the body fluid treatment article of the present invention is in the form of a foam, it is stretchable and can sufficiently follow the movements of the body during use, so there is no problem of discomfort or leakage of body fluids. Furthermore, the water-absorbing member used in the present invention uses a water-absorbing material with high water absorption rate, water absorption amount, and water retention capacity, and uses hydrophilic polyurethane as the base material, so it is compatible with conventional body fluid treatment products. In comparison, it has excellent initial water absorption speed, subsequent water absorption speed, water absorption rate, and water retention capacity under pressure load. Next, the present invention will be specifically explained with reference to Examples, Reference Examples, and Comparative Examples. Note that parts and percentages in the text are based on weight. Reference example 1 80 parts of poly(oxypropylene) poly(oxyethylene) glycol (40% oxyethylene content) with a molecular weight of approximately 3000, 20 parts of propylene oxide and ethylene oxide adduct of ethylenediamine (ethylene oxide content) with a molecular weight of approximately 6800, polyoxyalkylene 2.5 parts of siloxane, 0.7 parts of triethylenediamine
0.7 parts of tin octoate, 3.5 parts of water, and 30 parts of powder of water-absorbing material (2018) were thoroughly stirred and mixed, then 27.5 parts of tolylene diisocyanate was added, and about 10 parts of tin octoate was added.
The mixture was stirred at high speed for 2 seconds, allowed to stand for 15 minutes to gel and harden, and then heated to 120°C for 30 minutes to obtain a soft urethane foam with excellent water absorption and water retention properties. Reference example 2 Molecular weight 3000 using ethylene glycol as an initiator
Random copolymer of ethylene oxide and propylene oxide (ethylene oxide content: 75
%) 60 parts, random copolymer of ethylene oxide and propylene oxide with a molecular weight of approximately 3000 using pentaerythritol as an initiator (ethylene oxide content 70%) 40 parts, polyoxyalkylene siloxane 3.5 parts, triethylenediamine 0.7 part, tin octoate 0.7 part Then, 10 parts of trichloromonofluoromethane and 30 parts of powder of water-absorbing material () were added and stirred, and then 32.5 parts of tolylene diisocyanate was added, and the operations of Reference Example 1 were repeated as follows.Reference Example 1
A soft urethane foam similar to that was obtained. Reference Example 3 A soft urethane foam similar to that of Reference Example 1 was obtained by repeating the operation of Reference Example 1 except that another water-absorbing material ( ) was used in place of the water-absorbing material of Reference Example 1. Reference Example 4 In place of the polyether polyol in Reference Example 1, a polyester polyol (with a molecular weight of approx.
4000), 40 parts of propylene oxide and ethylene oxide adduct of ethylenediamine having a molecular weight of about 6800 (ethylene oxide content: 20%), and 25 parts of tolylene diisocyanate were used. A soft urethane foam similar to that was obtained. Reference example 5 80 parts of poly(oxypropylene) poly(oxypropylene) glycol (oxyethylene content 60%) with a molecular weight of about 4500, 20 parts of propylene oxide and ethylene oxide adduct of ethylene diamine (20% ethylene oxide content) with a molecular weight of about 6800, 3.5 parts of oxyalkylene siloxane, 0.7 parts of cyclohexylamine, 0.7 parts of tin octoate, 4.5 parts of water and 45 parts of water-absorbing material powder were thoroughly stirred and mixed, 27.5 parts of tolylene diisocyanate was added, and 10 parts of tolylene diisocyanate was added.
The mixture was stirred at high speed for 2 seconds, allowed to stand for 30 minutes to gel and harden, and heated to 100° C. for 1 hour to obtain a soft urethane foam. This product has excellent absorbency for artificial urine, artificial menstrual blood, etc., but normally disintegrates easily in water when stirred. Reference Example 6 Poly(oxypropylene) poly(oxyethylene) glycol of Reference Example 5 (oxyethylene content 60
%), 75 parts of poly(oxypropylene) poly(oxyethylene) glycol (oxyethylene content 60%) and 5 parts of polyester polyol (molecular weight approximately 4000) consisting of polyethylene glycol with a molecular weight of 600 and succinic acid. The operation of Reference Example 5 was repeated except that a soft urethane foam having excellent absorbency for artificial urine, artificial menstrual blood, etc. was obtained. Like the soft urethane foam obtained in Reference Example 5, this product is easily disintegrated in water, and since the urethane foam contains ester bonds, the urethane foam is hydrolyzed in water over a long period of time, resulting in the final The favorable result is that it causes microbial decomposition and does not cause environmental pollution even if it is flushed into wastewater. Comparative Example 1 A soft urethane foam was obtained by repeating the operation of Reference Example 1 except that no water-absorbing material was used. Comparative Example 2 The operation of Reference Example 1 was repeated except that the same amount of commercially available water absorbent material (saponified starch-acrylonitrile graft copolymer) was used in place of the water absorbent material of Reference Example 1, and soft urethane I got the form. The water-absorbing materials used in the above reference examples are as follows. (a) Water-absorbing material ()……(polystyrene) (――
Thioglycolic acid is added to almost all of the double bonds of a polybutadiene) (--polystyrene) block copolymer (polystyrene content 15%) to form a sodium salt of carboxylic acid, which has a weight of about 400 times its own weight. absorb water. (b) Water-absorbing material ()...... (polystyrene) (--polyisoprene) (-- polystyrene) block copolymer (polystyrene content 13%) with thioglycolic acid added to almost all double bonds. It is a sodium salt of carboxylic acid, which absorbs about 250 times its own weight in water. (c) Water-absorbing material ()......(Polystyrene) (--
Thioglycolic acid is added to almost all the double bonds of a polybutadiene) (--polystyrene) block copolymer (polystyrene content 20%) to form a sodium salt of carboxylic acid, which has a weight of about 300 times its own weight. absorb water. The properties of the urethane foams obtained in Reference Examples and Comparative Examples against artificial urine and artificial menstrual blood, and against normal water were investigated, and the results were as shown in Table 1 below.

[Table] In Table 1 above, the water absorption rate is 2cm x 2cm x
Water retention is expressed as the time it takes for a 1 cm sized urethane foam to be floated on the surface of artificial urine or artificial menstrual blood, absorb water, and completely submerge in water. The foam was immersed in water to absorb sufficient water, taken out, placed on paper, and a load of 0.4 kg/cm ² was applied for 1 minute.The water content in the foam that remained without flowing out was expressed as a percentage. , Disintegratability in water is determined by immersing a sample of the same size as above in 100 c.c. tap water for 10 minutes, stirring gently with a glass rod, and visually determining the sample. indicates that it still retains its shape, and "presence" indicates that the sample has disintegrated into pieces. "Elution of water-absorbing material" is determined by immersing a sample in artificial urine or artificial menstrual blood for one hour, and visually determining whether the water-absorbing material escapes or falls off the foam. The compositions of the artificial urine and artificial menstrual blood used are as follows. (a) Composition of artificial urine Potassium sulfate 2.04 parts Calcium chloride dihydrate 0.85 parts Magnesium sulfate heptahydrate 1.14 parts Sodium chloride 8.20 parts Urea 20.00 parts Water 967.77 parts Total 1000 parts (b) Composition of artificial menstrual blood Chloride Sodium 10.0 parts Sodium carbonate 4.0 parts Glycerin 100.0 parts CMC 4.6 parts Water 881.4 parts Total 1000 parts Example 1 The soft urethane foam obtained in Reference Examples 1 to 6 and Comparative Examples 1 to 2 was 65 mm wide, 160 mm long, and thick.
After making it into a 10mm sheet and placing waterproof paper on the bottom,
A sanitary napkin with sufficient elasticity and soft touch was obtained by wrapping the sanitary napkin with rayon paper. The characteristics of the obtained sanitary napkin were investigated, and the results were as shown in Table 1 below.
In addition, as Comparative Example 3, a sanitary napkin was obtained by laminating 4.5 g of cotton-like pulp, which is currently commonly used as a water-absorbing material, on waterproof paper and then wrapping it with rayon paper, which also had the same characteristics. The results are also shown in Table 1 below.

[Table] In Table 1, water absorption is the amount of water absorbed by soaking a sanitary napkin in artificial menstrual blood and expressed in grams, and water retention is the amount of water absorbed by soaking the sanitary napkin in artificial menstrual blood. A load of 0.4 kg/cm ² is applied to the napkin for 1 minute, and the remaining water in the napkin is expressed as a percentage. Disintegratability in water is determined by placing the sufficiently water-absorbed napkin mentioned above into a household human waste septic tank filled with tap water, and visually determining the shape of the napkin after 1 hour. show that you are doing
``Existence'' indicates that it has collapsed into pieces. Example 2 The soft urethane foam obtained in Reference Example 1, Reference Example 6, and Comparative Example 2 was formed into a sheet with a width of 65 mm, a length of 160 mm, and a thickness of 5 mm, and a woven pulp was placed on the sheet.
After laminating 2.5 g of the sheet, a waterproof layer was provided on the bottom of the sheet, and the sheet was wrapped with rayon paper to obtain a sanitary napkin. This was subjected to the same test as in Example 1, and the results are shown in Table 2 below.

[Table] Example 3 The sheets of soft urethane foam obtained in Reference Example 1, Reference Example 6, and Comparative Example 2 with a thickness of 3 mm were used to make a currently commercially available baby disposable diaper M size (flat type).
A disposable diaper having sufficient shape retention, elasticity, and soft feel was obtained by using the cotton-like pulp absorbent material instead of the absorbent material. The results of examining the characteristics of this diaper are shown in Table 3 below. As a comparative example, results for commercially available disposable diapers are also listed.

[Table] In Table 3, the amount of water absorbed is calculated by soaking the diaper in artificial urine and absorbing enough water.
Water retention is expressed as a percentage of water remaining in the diaper when a load of 0.4 kg/cm ² is applied for 1 minute to the diaper that has sufficiently absorbed water.
Disintegratability in water was determined by tearing off the cover material of the diaper that had sufficiently absorbed water, placing only the absorbent material into a domestic urine septic tank, and visually determining the shape after 1 hour. Example 4 Dissolved pulp was laminated on a 2 mm thick sheet of soft urethane foam obtained in Reference Example 1, Reference Example 6 and Comparative Example 2 to a thickness of 1 mm and a density of 0.1 g/cm ³ was used in place of the cotton-like pulp absorbent material of a commercially available baby disposable diaper M size (flat type) to obtain a disposable diaper having sufficient shape retention, elasticity, and soft feel. This was tested in the same manner as in Example 3, and the results are shown in Table 4 below.

[Table] Example 5 A sheet of 2.5 mm thick soft urethane foam obtained in Reference Example 1, Reference Example 6, and Comparative Example 2 was 45 mm wide.
The tampons were cut to a length of 90 mm, stacked in three layers, wrapped in liquid-permeable non-woven fabric, attached with a retrieval cord, and compressed to form a nearly cylindrical tampon. After investigating its properties, the results were as follows: The tampon according to the invention had excellent absorption. For comparison, results for a commercially available tampon using conventional cotton rayon fibers are also shown.

[Table] Test method Absorption amount (1) is determined by soaking a tampon in artificial menstrual blood, allowing it to be fully absorbed, then taking it out and measuring its weight.
The absorbed amount of menstrual blood is expressed in g.Absorption amount (2) is calculated by placing a tampon in a thin rubber tube and applying artificial menstrual blood from the tip of the tampon while applying a pressure of 200 mmH ₂ O from the outside of the rubber tube. let it absorb,
Artificial menstrual blood was poured into the tampon until it leaked out from the bottom of the tampon, and the amount absorbed at that time was expressed in g.

Claims (1)

[Scope of Claims] 1. A body fluid treatment article comprising a water-absorbing member made of a hydrophilic polyurethane foam and a water-absorbing material uniformly dispersed in the foam, wherein the water-absorbing material comprises a hydrophobic segment and a hydrophilic segment. A body fluid treatment article having excellent water absorption and water retention properties, which is a block and/or graft copolymer consisting of a hydrophilic polyurethane foam and a hydrophilic polyol. 2. The water-absorbing material has at least one (hydrophobic segment) (-hydrophilic segment) (-
―
2. The body fluid treatment article according to claim 1, which is a block and/or graft copolymer having a bonding type of hydrophobic segment). 3 The hydrophilic polyol is polyethylene glycol using a dihydric or higher polyhydric alcohol and an amine as an initiator, a block copolymer of polyethylene glycol and polyalkylene glycol in which polyethylene glycol accounts for about 20% by weight or more, and reaction of ethylene oxide. The body fluid treatment article according to claim 1, which is a random copolymer of ethylene oxide and alkylene oxide in an amount of about 20% by weight or more, or a polyester polyol of these and a polyvalent carboxylic acid of dihydric or higher valence. 4. The body fluid treatment product according to claim 1, which is a sanitary napkin, tampon, or diaper. 5. The body fluid treatment article according to claim 1, wherein the water-absorbing member absorbs and retains body fluid, but normally disintegrates in water.