CA1280258C - Water setting paper - Google Patents
Water setting paperInfo
- Publication number
- CA1280258C CA1280258C CA000526903A CA526903A CA1280258C CA 1280258 C CA1280258 C CA 1280258C CA 000526903 A CA000526903 A CA 000526903A CA 526903 A CA526903 A CA 526903A CA 1280258 C CA1280258 C CA 1280258C
- Authority
- CA
- Canada
- Prior art keywords
- water
- absorbency
- high water
- resin
- paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Absorbent Articles And Supports Therefor (AREA)
Abstract
WATER SETTING PAPER
ABSTRACT OF THE DISCLOSURE
Water setting paper (high water-absorbency material) comprised of pulp fiber, water-soluble resin and high wate-absorbency resin is produced in sheet form for use in urine containers or portable toilets. Water setting paper orthe high water-absorbency sheet thus formed absorbs and solidifies the urine, allowing the urine to be disposed of easily, rapidly and hygienically.
ABSTRACT OF THE DISCLOSURE
Water setting paper (high water-absorbency material) comprised of pulp fiber, water-soluble resin and high wate-absorbency resin is produced in sheet form for use in urine containers or portable toilets. Water setting paper orthe high water-absorbency sheet thus formed absorbs and solidifies the urine, allowing the urine to be disposed of easily, rapidly and hygienically.
Description
12~3~2~i~
BACK GROUND O~ THE INVENTION
~;eld of the Invent;on This invention relates to a water setting (water solidifying~ paper or a high wa-ter-absorbency material in sheet form containing high water-absorbency resin.
Description of the Prior Art It is generally known that paper produced from paper-making materials containing carboxymethylcellulose (CMC-H) or corboxyethylcellulose (C~C-}I), andthe respective aluminum salt, barium salt, zinc salt, tin salt and manganese salt thereof (CMC-~l, CMC-Ba, CMC-Zn, C~C-Sn, CMC-I~n, CEC-~l, C~C-Ba, CLC-~n, CEC-Sn, CEC-~n) are water-soluble or have the property of becoming rapidly dispersed in water. Water-soluble paper is utili~ed as the paper for secret documents and for water-soluble labels. ~ethods for manufacturing paper that is water-soluble or which disperses rapidly in water are disclosed in, for example, Japanese Laid-open Pa-tent No. 38-(1963) 25,159, Japanese Laid-open Patent ,No. 39-(1964? 152, Japanese Laid-open Patent No. 40-(1965) 968, JapaneseLaid-open Patent No. 42-(1967) 2,925, Japanese Laid-open Pa-tent No. 43-(1968) 1,214 and Japanese Laid-open Patent No, 48-(1973) 27,605~
Also, because high water-absorbency resins of the grafted-starch series, cellulose series and polyacrylic acid series have higher water--absorbency than conventional water-absorbing materials such as cotton, cloth, sponge and tissue paper, they are used in sanitary napkins, paper diapers, underpads and the like.}ligh water-absorbency resin is used by encapsulation or inclusion of the resin in non-woven fabrics or pulp products such as tissue paper and the like which are then disposed at an inner portion of the sanitary napkin, paper diaper and so forth, so that the water content of the voided urine and the like passing through the paper is absorbed and solidified at the inner portion, with even the surface moisture of the paper itself being absorbed, providing the products with a clean feeling in use.
, .. ~ ~. ,. ' ., - ..
12~30258 Disposal following urination has been a prohlem in the case of conventional urine containers such as ur;ne bottles and portable toilets, the drawback being that urine that has been collected in the container is spilled when the container is moved or shaken, soil;ng the surroundings. To eliminate this drawback, conventionally high water-absorbencY resin has been placed insidethe urine bottle or other such urine container to solidify the urine.
Another method that has been advanced has involved encapsulating the said high water-absorbency resin inside a non-waven fabric or pulp product, and inserting the thus-prepared product into the urine container.
However, because with this method the high water-absorbency resin is enveloped in pulp, it becomes interlocked with the long pulp fibers and is not easily dissolved. And with respect also to disposal, because it does not readily dissolve in water, it is not possible to flush it down flush toilets.
Therefore the only way the product could be dissolved after use was by means of formerly used methods such as incineration.
With the method involving the spreading of high water-absorbency resin as it is in the urine container, the spreading took time, and as the resin was inserted in particulate form, it had the drawback of being inconvenient to storeand handle. Then again, because particulate resin reacts with small amounts of liquid and sets starting at the surface, resin which is lying thereunder and therefore not exposed to the surface loses any chance of being involved in the reaction owing to the setting of the surface resin, so that in many cases it remains in the urine container in a state of incomplete reaction ~agglomerate state). In order to activate it, it is necessary to stir up to underlying resin to bring it to the surface, but as in fact this is unhygienic, it is usually disposed of in its entirety.
SUMM~RY OF TIIE INVENTION
It is an object of this invention to provide a high water-absorbency material in sheet form water setting ~water-solidifying) paper which enables the urine in a urine bottle or suchl;ke urine container or portable toilet to be 28025g3 disposed of easily, rapidly and hygienically and can be applied widely in many other ways.
The water setting paper or the high water-absorbency material in sheet form according to this invention comprises pulp fiber, water-soluble resin and high water-absorbency resin. The compound ratio of the fiber and resin is not an issue, but in order to raise the water absorbency it is preferable that the pulp fibers be kept to a small (trace) amount and the water-soluble resin and high water-absorbency resin be mixed in in a large amount (about ~0%).
Methods for forming the sheet include the above method of mixing pulp fiber, water-soluble resin and high water-absorbency resin and forming it into sheet, a method whereby water-soluble paper consisting of pulp-fiber and water-soluble resin is used to sandwich the high water-absorbency resin, and a method whereby high water-absorbency resin is bonded to water-soluble paper. There is also a method wherein sheet formed from the said mi~ture of pulp-fiber, water-soluble resin and high water-absorbency resin is used to sandwich the high water-absorbency resin. Compared with the method whereby water-soluble paper is used to sandwich high water-absorbency resin, this provides an improved water-absorbency ratio because two high water-absorbency water-soluble sheets are used. Also, with the method using conventional water-soluble paper to sandwich the high water-absorbency resin, the finished sheet ;s thick and stiff, in addition to which ;f the amount of high water-absorbency resin is increased to raise the water-absorbency ratio, there has been the problem that the sheet loses resiliency, but with water-soluble paPer containing high water-absorbency resin resiliency is retained. Ilowever, the water setting (solidifying) paper (the high water-absorbency sheet) according to this invention may be formed using any method of manufacture, laminate state or structure, provided it is in sheet form.
As the high water-absorbency resin for use in this invention, in addition to natural resins such as starch there may be utili~ed various synthetic resins produced by the crosslinking of polyacrylic acid, polystyrene sulfonic acid, --` 1280258 polyvinyl pyridine, maleic anhydride, carboxylmethylcellulose, polyethylene oxide, polyvinyl aoclhol, or cellulose ether. The high water-absorbency resin for use in this invention is not however limited to the above ones, which are examples of existing high water-absorbencY resins; in addition to the above, any other resin which has high water-absorbency may also be utili~ed.
Also, carboxymethylcellulose (CMC-H) or carboxyethylcellulose (C~C-H) are often utilized as the water-soluble resin, but the respective aluminum salt, barium salt, zinc salt, tin salt and manganese salt thereof (C~C-~, CMC-Ba, CMC-Zn, CMC-Sn, CMC-Mn, CEC-A1, CEC-Ba, CEC-Zn, CEC-Sn, CEC-Mn) may also be utilized. The water-soluble resin for use in this invention is not however limited to the above ones, which are examples of existing water-soluble resins;
in addition to the above, any other resin which is water-soluble may also utilized. ~oreover, if required by an application, paper-making materials such kraft pulp for paper-making, sulfite pulp, soluble pulp for synthetic fiber and other such vegetable fibers, polyamide, polyester and other such synthetic fibers, glass fiber, asbestos and other inorganic fibers may be mixed in as required up to a proportion which does not impede dispersion and dissolution in water.
High water-absorbency resins are generally of a grafted-starch system, cellulose system, or polyacrylic acid system. It is known that when water-soluble resin is crosslinked, as the density of the crosslinks increases the nature of the resin changes, from water-solubili-ty to water-growth, and then to merely lyophilic. Iligh water-absorbency resin is an application of water-growth resin obtained from low-density crosslinking. That is, high water-absorbency resin is made by low-density crosslinking of water-soluble resin such as C~C, PV~, polyacrylic acid soda, starch-acrylic acid graft polymer, starch-acrylilonitrile graft polymer hydrozylates, and possesses high water-absorbency and low water-retentivity. Whereas pulp and tissue paper can absorb up to 2D times their own wei~ht of water, high water-absorbency resin can absorb at least 50 to 500 timeg its own weight of water. Pulp or sponge only forms a 2a~i8 state whereby water is occluded in the ;nternal spaces thereof, so the water is easily ejected by the application QP external pressure. When high water-absorbency resin comes into contact with water it reacts chemically, swelling and gelling, so that once water has been absorbed and it has swollen and jelled,water-retentivity is high, as water does not leak out even when an external pressure is applied.
High water-absorbency resin possessing these characteristics is sandwiched in layer form between the said water-soluble resin such as CMC-H and pulp fiber,or the high water-absorbency resin is mixed in during the paper-making process, to produce the high water-absorbency sheet of this invention. However, sandwiching the resin between pulp fiber layers involves a problem with regard to sheet flexibilitY, so there is a limit to the amount of high water-absorbencyresin that is to be thus sandwiched, and accordingly the water-absorbency limit is 20 times its own weight. Therefore, it is preferable that high water-absorbency resin be mixed in during the paper-making process, and, if moreover high water-absorbency resin is sandwiched between sheets produced with high water-absorbency resin mixed therein it becomes possible to attain the said water-absorbensy ratio of some 50 to 500 times.
When water setting paper (high water-absorbency sheet~ formed as described above comes into contact with water or some other aqueous solution, because it contains the said CMC-H or the like the water setting paper ~hi~h water-absorbency sheet) first dissolves in the water, and the high water-absorbency resin contained in the water setting paper (high water-absorbency sheet) or which has been sandwiched therein dissolves in the water, the reaction starts, and the water content starts to set, swelling and gelling.
Where there is water content the water setting ~solidifying)paper (high water-absorbency sheet) dissolves, but dissolution stops when a state of saturation is reached, leaving the water setting paper (high water-absorbency sheet) with portions which have dissolved and portions which are still ;n sheet form. With the next influx of water the portions of the remaining part of the water setting (water sol;difying) 1paper ~h21g~ wa-ter-absorben(;y sheet) involved melt, and the high water-absorbency resin contained inside the water setting paper (higtl water-absorbency sheet) or which has been sandwiched therein starts reacting, swelli~g and gelling.
Therefore, because unlike the conventional chemlcal agent (po~der) form of high water-absorbency resin it is in the for~ of a sheet, it elimin~tes the drawback of underlying particles resulting in the agent setting without the reaction having taken place fully, so that it is possible to maintain a state in which additional moisture can be absorbed at any time. This ;s the merit of the entirely different sheet form, compared with the conventional chemical agent.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will now be described in detail with reference to the attached drawings, where Figure 1 is a perspective view showing the water setting paper (high water-absorbency sheet) of this invention, in place inside a urine container, and Figure ~ is a perspective view of a portable -toilet in which has been placed the water setting paper ~highly water-absorbent sheet).
DESCRIPTION OF THE PREFERRED EMBODIMENT
The water setting paper (high water-absorbency sheet) merely has to be placed in the urine container. In the case of the conventional high water-absorbency resin powder any tilting or shaking of the container could cause the agent to spill out, but with the water setting paper (high water-absorbency sheet) according to this invention there is no concern that such tilting or shaking may cause the inserted sheet to fall out.
When urine is voided into such a container, the paper component containing the said CMC-H or the like being water-soluble therefore disperses and dissolves in the urine, and as the water setting paper (high water-absorbency sheet) dissolves the high water-absorbency resin contained therein is exposed or 281)25il3 is dissolved. Thus, the h;gh water-absorbency agent starts to react, solidifying the water content, swelling and gelling. ~ovin~ or shaking the urine container does no-t therefore cause the urine therein to spill, so there is no soiling of the surroundings. Moreover, if high water-absorbency resin is placed inside the urine container as it is, irrespective of the amount of urine all of the resin is wetted, making further use thereof impossible, sothat each time urination is performed all the resin must be replaced. ~lowever, when the high water-absorbency resin is formed integrally with paper, as in this invention, or when the intergrally manufactured sheet is utilized to sandwich high water-absorbency resin, it still has water-retention capability, which is to say it retains the sheet form, so re-use is possible and it is economical.
Also, with respect to disposal, the gelled high water-absorbency resin can be easily washed out with water.
Furthermore, with the high water-absorbency resin reacting with the water content, solidifying it, the voided urine or the like does not come into contact with the air, so there is no release of unpleasant odors from the urine.
Thus, with the water setting (solidifying) paper (high water-absorbency sheet) according to the present invention and formed as described in the foregoing, by using high water setting paper (water-absorbency sheet) inserted in a urine container such as a urine bottle or a portable toilet, spillage of voided urine caused bu moving or shaking the container can be prevented. Also, as the solidified urine can be flushed down the toilet, disposal of the urine is simple, quick and hygienic. In addition, the ease with which it can be handled and its water absorbency and water retentivity enable it to be applied widely, such as to sanitary napkins and paper diapers and the like.
BACK GROUND O~ THE INVENTION
~;eld of the Invent;on This invention relates to a water setting (water solidifying~ paper or a high wa-ter-absorbency material in sheet form containing high water-absorbency resin.
Description of the Prior Art It is generally known that paper produced from paper-making materials containing carboxymethylcellulose (CMC-H) or corboxyethylcellulose (C~C-}I), andthe respective aluminum salt, barium salt, zinc salt, tin salt and manganese salt thereof (CMC-~l, CMC-Ba, CMC-Zn, C~C-Sn, CMC-I~n, CEC-~l, C~C-Ba, CLC-~n, CEC-Sn, CEC-~n) are water-soluble or have the property of becoming rapidly dispersed in water. Water-soluble paper is utili~ed as the paper for secret documents and for water-soluble labels. ~ethods for manufacturing paper that is water-soluble or which disperses rapidly in water are disclosed in, for example, Japanese Laid-open Pa-tent No. 38-(1963) 25,159, Japanese Laid-open Patent ,No. 39-(1964? 152, Japanese Laid-open Patent No. 40-(1965) 968, JapaneseLaid-open Patent No. 42-(1967) 2,925, Japanese Laid-open Pa-tent No. 43-(1968) 1,214 and Japanese Laid-open Patent No, 48-(1973) 27,605~
Also, because high water-absorbency resins of the grafted-starch series, cellulose series and polyacrylic acid series have higher water--absorbency than conventional water-absorbing materials such as cotton, cloth, sponge and tissue paper, they are used in sanitary napkins, paper diapers, underpads and the like.}ligh water-absorbency resin is used by encapsulation or inclusion of the resin in non-woven fabrics or pulp products such as tissue paper and the like which are then disposed at an inner portion of the sanitary napkin, paper diaper and so forth, so that the water content of the voided urine and the like passing through the paper is absorbed and solidified at the inner portion, with even the surface moisture of the paper itself being absorbed, providing the products with a clean feeling in use.
, .. ~ ~. ,. ' ., - ..
12~30258 Disposal following urination has been a prohlem in the case of conventional urine containers such as ur;ne bottles and portable toilets, the drawback being that urine that has been collected in the container is spilled when the container is moved or shaken, soil;ng the surroundings. To eliminate this drawback, conventionally high water-absorbencY resin has been placed insidethe urine bottle or other such urine container to solidify the urine.
Another method that has been advanced has involved encapsulating the said high water-absorbency resin inside a non-waven fabric or pulp product, and inserting the thus-prepared product into the urine container.
However, because with this method the high water-absorbency resin is enveloped in pulp, it becomes interlocked with the long pulp fibers and is not easily dissolved. And with respect also to disposal, because it does not readily dissolve in water, it is not possible to flush it down flush toilets.
Therefore the only way the product could be dissolved after use was by means of formerly used methods such as incineration.
With the method involving the spreading of high water-absorbency resin as it is in the urine container, the spreading took time, and as the resin was inserted in particulate form, it had the drawback of being inconvenient to storeand handle. Then again, because particulate resin reacts with small amounts of liquid and sets starting at the surface, resin which is lying thereunder and therefore not exposed to the surface loses any chance of being involved in the reaction owing to the setting of the surface resin, so that in many cases it remains in the urine container in a state of incomplete reaction ~agglomerate state). In order to activate it, it is necessary to stir up to underlying resin to bring it to the surface, but as in fact this is unhygienic, it is usually disposed of in its entirety.
SUMM~RY OF TIIE INVENTION
It is an object of this invention to provide a high water-absorbency material in sheet form water setting ~water-solidifying) paper which enables the urine in a urine bottle or suchl;ke urine container or portable toilet to be 28025g3 disposed of easily, rapidly and hygienically and can be applied widely in many other ways.
The water setting paper or the high water-absorbency material in sheet form according to this invention comprises pulp fiber, water-soluble resin and high water-absorbency resin. The compound ratio of the fiber and resin is not an issue, but in order to raise the water absorbency it is preferable that the pulp fibers be kept to a small (trace) amount and the water-soluble resin and high water-absorbency resin be mixed in in a large amount (about ~0%).
Methods for forming the sheet include the above method of mixing pulp fiber, water-soluble resin and high water-absorbency resin and forming it into sheet, a method whereby water-soluble paper consisting of pulp-fiber and water-soluble resin is used to sandwich the high water-absorbency resin, and a method whereby high water-absorbency resin is bonded to water-soluble paper. There is also a method wherein sheet formed from the said mi~ture of pulp-fiber, water-soluble resin and high water-absorbency resin is used to sandwich the high water-absorbency resin. Compared with the method whereby water-soluble paper is used to sandwich high water-absorbency resin, this provides an improved water-absorbency ratio because two high water-absorbency water-soluble sheets are used. Also, with the method using conventional water-soluble paper to sandwich the high water-absorbency resin, the finished sheet ;s thick and stiff, in addition to which ;f the amount of high water-absorbency resin is increased to raise the water-absorbency ratio, there has been the problem that the sheet loses resiliency, but with water-soluble paPer containing high water-absorbency resin resiliency is retained. Ilowever, the water setting (solidifying) paper (the high water-absorbency sheet) according to this invention may be formed using any method of manufacture, laminate state or structure, provided it is in sheet form.
As the high water-absorbency resin for use in this invention, in addition to natural resins such as starch there may be utili~ed various synthetic resins produced by the crosslinking of polyacrylic acid, polystyrene sulfonic acid, --` 1280258 polyvinyl pyridine, maleic anhydride, carboxylmethylcellulose, polyethylene oxide, polyvinyl aoclhol, or cellulose ether. The high water-absorbency resin for use in this invention is not however limited to the above ones, which are examples of existing high water-absorbencY resins; in addition to the above, any other resin which has high water-absorbency may also be utili~ed.
Also, carboxymethylcellulose (CMC-H) or carboxyethylcellulose (C~C-H) are often utilized as the water-soluble resin, but the respective aluminum salt, barium salt, zinc salt, tin salt and manganese salt thereof (C~C-~, CMC-Ba, CMC-Zn, CMC-Sn, CMC-Mn, CEC-A1, CEC-Ba, CEC-Zn, CEC-Sn, CEC-Mn) may also be utilized. The water-soluble resin for use in this invention is not however limited to the above ones, which are examples of existing water-soluble resins;
in addition to the above, any other resin which is water-soluble may also utilized. ~oreover, if required by an application, paper-making materials such kraft pulp for paper-making, sulfite pulp, soluble pulp for synthetic fiber and other such vegetable fibers, polyamide, polyester and other such synthetic fibers, glass fiber, asbestos and other inorganic fibers may be mixed in as required up to a proportion which does not impede dispersion and dissolution in water.
High water-absorbency resins are generally of a grafted-starch system, cellulose system, or polyacrylic acid system. It is known that when water-soluble resin is crosslinked, as the density of the crosslinks increases the nature of the resin changes, from water-solubili-ty to water-growth, and then to merely lyophilic. Iligh water-absorbency resin is an application of water-growth resin obtained from low-density crosslinking. That is, high water-absorbency resin is made by low-density crosslinking of water-soluble resin such as C~C, PV~, polyacrylic acid soda, starch-acrylic acid graft polymer, starch-acrylilonitrile graft polymer hydrozylates, and possesses high water-absorbency and low water-retentivity. Whereas pulp and tissue paper can absorb up to 2D times their own wei~ht of water, high water-absorbency resin can absorb at least 50 to 500 timeg its own weight of water. Pulp or sponge only forms a 2a~i8 state whereby water is occluded in the ;nternal spaces thereof, so the water is easily ejected by the application QP external pressure. When high water-absorbency resin comes into contact with water it reacts chemically, swelling and gelling, so that once water has been absorbed and it has swollen and jelled,water-retentivity is high, as water does not leak out even when an external pressure is applied.
High water-absorbency resin possessing these characteristics is sandwiched in layer form between the said water-soluble resin such as CMC-H and pulp fiber,or the high water-absorbency resin is mixed in during the paper-making process, to produce the high water-absorbency sheet of this invention. However, sandwiching the resin between pulp fiber layers involves a problem with regard to sheet flexibilitY, so there is a limit to the amount of high water-absorbencyresin that is to be thus sandwiched, and accordingly the water-absorbency limit is 20 times its own weight. Therefore, it is preferable that high water-absorbency resin be mixed in during the paper-making process, and, if moreover high water-absorbency resin is sandwiched between sheets produced with high water-absorbency resin mixed therein it becomes possible to attain the said water-absorbensy ratio of some 50 to 500 times.
When water setting paper (high water-absorbency sheet~ formed as described above comes into contact with water or some other aqueous solution, because it contains the said CMC-H or the like the water setting paper ~hi~h water-absorbency sheet) first dissolves in the water, and the high water-absorbency resin contained in the water setting paper (high water-absorbency sheet) or which has been sandwiched therein dissolves in the water, the reaction starts, and the water content starts to set, swelling and gelling.
Where there is water content the water setting ~solidifying)paper (high water-absorbency sheet) dissolves, but dissolution stops when a state of saturation is reached, leaving the water setting paper (high water-absorbency sheet) with portions which have dissolved and portions which are still ;n sheet form. With the next influx of water the portions of the remaining part of the water setting (water sol;difying) 1paper ~h21g~ wa-ter-absorben(;y sheet) involved melt, and the high water-absorbency resin contained inside the water setting paper (higtl water-absorbency sheet) or which has been sandwiched therein starts reacting, swelli~g and gelling.
Therefore, because unlike the conventional chemlcal agent (po~der) form of high water-absorbency resin it is in the for~ of a sheet, it elimin~tes the drawback of underlying particles resulting in the agent setting without the reaction having taken place fully, so that it is possible to maintain a state in which additional moisture can be absorbed at any time. This ;s the merit of the entirely different sheet form, compared with the conventional chemical agent.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will now be described in detail with reference to the attached drawings, where Figure 1 is a perspective view showing the water setting paper (high water-absorbency sheet) of this invention, in place inside a urine container, and Figure ~ is a perspective view of a portable -toilet in which has been placed the water setting paper ~highly water-absorbent sheet).
DESCRIPTION OF THE PREFERRED EMBODIMENT
The water setting paper (high water-absorbency sheet) merely has to be placed in the urine container. In the case of the conventional high water-absorbency resin powder any tilting or shaking of the container could cause the agent to spill out, but with the water setting paper (high water-absorbency sheet) according to this invention there is no concern that such tilting or shaking may cause the inserted sheet to fall out.
When urine is voided into such a container, the paper component containing the said CMC-H or the like being water-soluble therefore disperses and dissolves in the urine, and as the water setting paper (high water-absorbency sheet) dissolves the high water-absorbency resin contained therein is exposed or 281)25il3 is dissolved. Thus, the h;gh water-absorbency agent starts to react, solidifying the water content, swelling and gelling. ~ovin~ or shaking the urine container does no-t therefore cause the urine therein to spill, so there is no soiling of the surroundings. Moreover, if high water-absorbency resin is placed inside the urine container as it is, irrespective of the amount of urine all of the resin is wetted, making further use thereof impossible, sothat each time urination is performed all the resin must be replaced. ~lowever, when the high water-absorbency resin is formed integrally with paper, as in this invention, or when the intergrally manufactured sheet is utilized to sandwich high water-absorbency resin, it still has water-retention capability, which is to say it retains the sheet form, so re-use is possible and it is economical.
Also, with respect to disposal, the gelled high water-absorbency resin can be easily washed out with water.
Furthermore, with the high water-absorbency resin reacting with the water content, solidifying it, the voided urine or the like does not come into contact with the air, so there is no release of unpleasant odors from the urine.
Thus, with the water setting (solidifying) paper (high water-absorbency sheet) according to the present invention and formed as described in the foregoing, by using high water setting paper (water-absorbency sheet) inserted in a urine container such as a urine bottle or a portable toilet, spillage of voided urine caused bu moving or shaking the container can be prevented. Also, as the solidified urine can be flushed down the toilet, disposal of the urine is simple, quick and hygienic. In addition, the ease with which it can be handled and its water absorbency and water retentivity enable it to be applied widely, such as to sanitary napkins and paper diapers and the like.
Claims (6)
1. Water setting paper (high water-absorbency material in sheet form) characterized by forming pulp fiber, water-soluble resin and high water-absorbency resin into sheet form.
2. The water setting paper (high water-absorbency material in sheet form) according to Claim 1 wherein the high water-absorbency resin is comprised of a synthetic resin such as produced by the crosslinking of polyacrylic acid, polystyrene sulfonic acid. polyvinyl pyridine, maleic anhydride, carboxylmethylcellulose polyethylene oxide, polyvinyl alcohol or cellulose ether.
3. The water setting paper (high water-absorbency material in sheet form) according to Claim 1 wherein the water-soluble resin is comprised of carboxymethylcellulose (CMC-H), carboxyethylcellulose (CEC-H), or the respectivealuminum salt, barium salt, zinc salt, tin salt and manganese salt thereof (CMC-Al, CMC-Ba, CMC-Zn, CMC-Sn, CMC-Mn, CEC-Al, CEC-Ba, CEC-Zn, CEC-Sn, CEC-Mn).
A. The water setting paper (high water-absorbency material in sheet form) according to Claim 1 wherein the water setting paper (high water-absorbency sheet) is inserted into a urine container such as a urine bottle.
5. The water setting paper (high water-absorbency material in sheet form) according to Claim 1 wherein the high water-absorbency sheet is inserted into a portable toilet.
6. The water setting paper (high water-absorbency material in sheet form) according to Claim 1 wherein the water setting paper (high water-absorbency sheet) is formed by sandwiching the highwater-absorbency resin between two paper (sheets) each of which are comprised of pulp fibers, water-soluble resin, and high water-absorbency resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000526903A CA1280258C (en) | 1987-01-07 | 1987-01-07 | Water setting paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000526903A CA1280258C (en) | 1987-01-07 | 1987-01-07 | Water setting paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1280258C true CA1280258C (en) | 1991-02-19 |
Family
ID=4134704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000526903A Expired - Fee Related CA1280258C (en) | 1987-01-07 | 1987-01-07 | Water setting paper |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1280258C (en) |
-
1987
- 1987-01-07 CA CA000526903A patent/CA1280258C/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4846932A (en) | Water setting paper | |
| DE69815764T2 (en) | Process for producing a liquid absorbent product, and products thus obtained | |
| US5190533A (en) | Biodegradable fluid-absorbing structures | |
| US7560002B2 (en) | Water-absorbent structure and process for making the same | |
| CN102186335B (en) | Excretion disposal sheet for pet animals | |
| DE60112340T2 (en) | Absorbent mat for the treatment of excreta | |
| TW503280B (en) | Water-dispersible nonwoven fabrics containing temperature-sensitive or ion-sensitive binder composition and flushable personal care product thereof | |
| CA2300688C (en) | Pet animal body wastes treating material | |
| CN100512886C (en) | Apertured polymeric film web with diol/surfactant additive | |
| EP0633009A2 (en) | Absorptive article | |
| AU2010349863A1 (en) | Animal excrement disposal sheet and manufacturing method thereof | |
| KR102026158B1 (en) | Pads to check the urination of companion animals | |
| JP2007098152A (en) | Sanitation sheet | |
| US7028637B2 (en) | Discharged waste processing material for pet animals | |
| TW213413B (en) | ||
| CA1280258C (en) | Water setting paper | |
| JP4970740B2 (en) | Absorber, sheet, packaging material and method for producing the same | |
| JPH0458346B2 (en) | ||
| JP4649558B2 (en) | Sanitary sheets and manufacturing method thereof | |
| JP2000308557A (en) | Absorber and sheet using the absorber | |
| JP5476092B2 (en) | Water absorption treatment material | |
| JP3076551B1 (en) | Absorber and sheets using the absorber | |
| JP3354884B2 (en) | Sanitary paper, sanitary sheets using the same, and methods for producing them | |
| JP2000070097A (en) | Sanitary sheet, and manufacture thereof | |
| JP3784213B2 (en) | Absorber and sheet and packaging material using the absorber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |