JP5635249B2 - Sponge with shaft and method for manufacturing the same, and sponge body mounted on shaft and method for manufacturing the same - Google Patents

Description

The present invention is, for example, precision instrument cleaning or other absorption liquid, a method of manufacturing an-out with available axes sponge as sanitary products such as liquid applying, and to the sponge body and a manufacturing method thereof that is attached to the shaft rod.

  Japanese Patent Application Laid-Open No. 2000-325368 discloses a vaginal sponge in which a locking portion is formed in the vicinity of an end portion of a rod-shaped body, and a sponge body is detachably locked to the end portion of the rod-shaped body via the locking portion. Is described.

JP 2000-325368 A

  However, if the sponge body has the same internal structure and surface, the desired water absorption performance or water supply performance may not be obtained. For example, when the pore size of the continuous pores formed by the sponge body is large and the porosity is high, a large amount of liquid can be retained inside, but the internal liquid tends to flow out from the surface. On the contrary, when the pore diameter of the continuous pores formed by the sponge body is small and the porosity is low, it is difficult for the liquid inside to flow out from the surface, but it is difficult to hold a lot of liquid inside.

  Then, an object of this invention is to provide the sponge with a stick | rod which can obtain suitable water absorption performance and water supply performance.

  To achieve the above object, the sponge with a stick according to the present invention includes a sponge body having a skin layer different from the internal structure on the surface at the end of the shaft stick.

  In the above configuration, the sponge body has a skin layer different from the internal structure on the surface thereof. In this skin layer, the pore diameter of the continuous pores is small and the porosity is low compared to the inside of the sponge body. Therefore, it is possible to hold a large amount of liquid inside, and it is difficult for the liquid inside to flow out from the surface, so that desired water absorption performance and water supply performance can be obtained.

In addition, the end of the shaft rod is dipped in a viscous slurry containing a resin solution and a pore-forming material and pulled up, so that the viscous slurry adheres as a drop of slurry to the end of the shaft rod , and the shaft rod The droplet slurry adhering to the end of the rod is immersed in water to insolubilize the resin component of the droplet slurry and the pore forming material is extracted and removed, or the droplet slurry adhering to the end of the shaft rod is predetermined. The resin component of the droplet slurry is insolubilized by immersing in the reaction solution, and then the insolubilized droplet slurry is washed to extract and remove the pore-forming material, thereby forming a droplet-shaped sponge body at the end of the shaft rod. Direct fixation may be formed.

  In the above configuration, since the sponge body is directly fixed to the end of the shaft rod, there is no need to form a hole for inserting the end of the shaft rod into the sponge body by post-processing, and the sponge body The complicated work of mounting on the shaft rod is also unnecessary.

In addition, by dipping the shaft end portion for sponge production into a viscous slurry containing a resin solution and a pore-forming material and pulling it up , the viscous slurry is dropped as a drop slurry into the shaft end portion for sponge body manufacture. The droplet slurry adhered to the shaft end is immersed in water to insolubilize the resin component of the droplet slurry and the pore-forming material is extracted and removed, or the droplet slurry adhered to the shaft end is removed. After dipping in a predetermined reaction solution to insolubilize the resin component of the droplet slurry, the insolubilized droplet slurry is washed and the pore-forming material is extracted and removed, so that the sponge body is separated from the shaft rod. The end of the shaft rod may be inserted into a hole formed at the end and formed by pulling out the sponge body from the shaft end.

  In the above configuration, since the hole of the sponge body is formed by pulling out the sponge body from the shaft end, it is not necessary to form a hole for inserting the end of the shaft rod in the sponge body by post-processing.

  In addition, various resin materials can be used as the sponge body fixedly formed at the end of the shaft rod by the above-described method and the sponge body formed at the shaft end for forming the sponge. A material that is insolubilized by being immersed in water as described above is suitable for production.

  Further, a protrusion may be provided on the outer surface of the end portion of the shaft rod.

  In the above configuration, since the protrusions prevent the sponge body from being detached from the shaft rod, the durability of the shaft-equipped sponge is improved.

  The end of the shaft rod may have a perforation, and the sponge body may be continuous through the perforation.

  In the above configuration, since the sponge body is continuous through the perforations, the sponge body is hardly detached from the shaft rod, and the durability of the sponge with a shaft is improved.

  Moreover, a hollow part may be formed inside the sponge body, the sponge body may be combined with a fibrous material, and at least a part of the skin layer of the sponge body may be excised.

  Further, the shaft rod may have a tube shape.

  In the above configuration, by injecting liquid in a pressurized state from one end side of the shaft rod to which the sponge body is not fixed to the inner diameter portion of the shaft rod, and flowing out from the surface of the sponge body through the other end side of the shaft rod. The liquid can be supplied to the contact target surface with which the sponge body contacts. Further, by sucking air from one end side of the shaft rod, the liquid transferred from the contact symmetry surface to the sponge body can be discharged to the outside through the inner diameter portion of the shaft rod.

  Moreover, the sponge body according to another aspect of the present invention formed separately from the shaft rod has a hole portion into which the end portion of the shaft rod is inserted. The sponge body is obtained by dipping and attaching a slurry containing a resin solution and a pore forming material to the shaft end portion for producing the sponge body, insolubilizing the resin component of the attached slurry, and extracting and removing the pore forming material. It is formed at the end of the shaft with a skin layer different from the internal structure on the surface. The hole of the sponge body is formed by pulling out the sponge body from the shaft end.

  In the above configuration, since the hole of the sponge body is formed by pulling out the sponge body from the shaft end, it is not necessary to form a hole for inserting the end of the shaft rod in the sponge body by post-processing.

  According to the present invention, a sponge with a shaft having suitable water absorption performance and water supply performance can be obtained.

It is sectional drawing which shows the edge part of sponge with a shaft. It is an external view which illustrates a shape. It is a schematic diagram for demonstrating the manufacturing method of sponge with a shaft. It is sectional drawing which illustrates the shape of the edge part of a shaft bar. It is sectional drawing which illustrates the aspect of a sponge body. It is sectional drawing which illustrates the aspect of a sponge body. It is an external view which illustrates the aspect of a sponge body. It is sectional drawing for demonstrating the method to manufacture a sponge body separately from a shaft bar.

  Hereinafter, a sponge with a shaft according to a first embodiment of the present invention will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, the shaft-equipped sponge 1 according to the present embodiment includes an elongated shaft rod 2 and a resin sponge body 3 having continuous pores. The sponge body 3 is directly fixed to the one end 4 of the shaft 2. A skin layer 5 different from the internal structure is formed on the surface of the sponge body 3.

  The skin layer 5 is a film of the sponge body 3 and has a lower porosity than the internal structure of the sponge body 3. Further, the average opening diameter of the continuous pores on the surface of the skin layer 5 is smaller than the average pore diameter of the continuous pores of the internal structure of the sponge body 3.

  The internal structure of the sponge body 3 and the skin layer 5 are preferably those having a porosity of 60% to 95% and an average pore diameter of 20 μm to 500 μm.

  When the porosity is less than 60% or when the average pore diameter is less than 20 μm, the desired liquid absorption and liquid supply properties cannot be obtained, and when the porosity exceeds 95% or the average pore diameter is 500 μm. This is because sufficient strength cannot be obtained and the practicality is insufficient in either case.

  The porosity is measured by measuring the weight of the sponge part in the dry state (sponge weight) and the water content (volume of water) when the sponge part is hydrated to saturation, and the sponge weight, water content and sponge. Is a value calculated from the true specific gravity of the following equation (1). When determining the porosity of the internal tissue of the sponge body 3, the skin layer 5 may be removed from the sponge body 3 to form a sponge portion. When determining the porosity of the skin layer 5, the sponge body 3 is obtained. A section obtained by cutting only the skin layer 5 may be used as a sponge part.

Porosity (%) = [Water content / ((Sponge weight / Sponge specific gravity) + Water content)] × 100 (1)
The average pore diameter is an average value of the diameters of a plurality of pores existing in the internal tissue of the sponge body 3. In this embodiment, the average value of the long diameters (distances in the longitudinal direction of each pore) of a predetermined number of pores extracted from a plurality of pores on a predetermined basis is defined as the average pore diameter, and is obtained, for example, by the following measurement method Can do.

  The sponge body 3 is cut at a predetermined position, and the internal tissue exposed on the cut surface is photographed with an electron microscope. Next, a predetermined measurement range is set in the photographed photograph, and 20 pores are extracted in descending order of the longest diameter from a plurality of pores existing in the measurement range. Next, each major axis of the 20 extracted pores is measured. Finally, the average of the 11th to 20th measurement values counted from the larger of the 20 measurement values is calculated as the average pore diameter.

  The average opening diameter of the surface of the skin layer 5 may also be defined in the same manner as the average pore diameter. That is, an average value of the long diameters (distances in the longitudinal direction of each opening) of a predetermined number of openings extracted from a plurality of openings on a predetermined basis is defined as an average opening diameter, and is obtained by a measurement method similar to the average pore diameter. Also good. In this case, after photographing the surface of the skin layer 5 with an electron microscope, 20 apertures are extracted in order of increasing major axis from a plurality of apertures existing within a predetermined measurement range of the photographed photograph. The major axis of each of the apertures is measured, and the average of the eleventh to twentieth measurement values counted from the larger of the 20 measurement values may be calculated as the average aperture diameter.

Furthermore, the internal structure of the sponge body 3 is preferably one having an apparent density of 0.18 g / cm ³ or more and a water retention of 470% or more.

  The apparent density is obtained by measuring the dry weight of a sponge material having a predetermined shape (for example, a rectangle) from which the skin layer 5 has been removed from the sponge body 3 and the external dimensions in a proper water content state. The volume (wet volume) is calculated and obtained as a value obtained by dividing the dry weight by the wet volume.

  The water retention rate was determined by measuring the dry weight (dry weight) of the sponge material from which the skin layer 5 was removed from the sponge body 3 and the wet weight (wet weight) in a sufficiently wet state. It is a value calculated by 2).

Water retention rate (%) = (wet weight−dry weight) / dry weight × 100 (2)
Further, when comparing the surface of the skin layer 5 with the cut surface of the sponge body 3 where the internal tissue is exposed, the open area ratio of the cut surface is 50% or more, whereas the open area ratio of the surface of the skin layer 5 is It is lower than the opening ratio of the cut surface, for example, 30% or less.

  The opening ratio of the cut surface is a value calculated by (total area of all pores opened within the predetermined range / area of the predetermined range) × 100 within the predetermined range of the cut surface. The opening ratio of the surface is a value calculated by (total area of all pores opened within the predetermined range / area of the predetermined range) × 100 within a predetermined range of the surface of the skin layer 5. Each aperture ratio can be determined by, for example, the following measurement method.

  The cut surface of the sponge body 3 and the surface of the skin layer 3 are each photographed with an electron microscope (magnification: 100 times), and the photograph is magnified twice (total 200 times). Next, a transparent sheet partitioned into a predetermined number of squares (5 mm square) by a plurality of vertical and horizontal boundary lines is placed on the photograph taken at 200 times magnification. Next, the photograph is visually observed on the transparent sheet, and in each cell, it is determined whether the area of the opening part (pore part) occupies half or more of the entire area, and the area of the opening part is half of the entire area. The cells that occupy the above are regarded as opening regions, and the number of cells is counted. Finally, (number of cells regarded as an opening area / total number of cells) × 100 is calculated as the aperture ratio.

  As shown in FIG. 2 (a), the shaft rod 2 has a linear shaft rod having substantially the same cross-sectional shape from one end side to the other end side, and a large-diameter gripping portion 6 on the other end side ( 2 (b)), those that bend at an intermediate portion (FIG. 2 (c)), and those that are curved (FIG. 2 (d)) can be used.

  Next, a method for fixing the sponge body 3 to the one end portion 4 of the shaft 2 will be described.

  First, a slurry (dipping slurry) containing a resin solution and a pore forming material is prepared, and this slurry is dipped and attached to one end portion 4 of the shaft 2.

  Next, the sponge 3 is directly fixed to the one end 4 of the shaft 2 by insolubilizing the resin component of the slurry adhering to the one end 4 of the shaft 2 and extracting and removing the pore forming material. Finally, the sponge body 3 is washed.

  For example, when the sponge body 3 made of urethane is fixedly formed, as shown in FIG. 3A, a polyurethane in which a pore forming material (for example, sodium sulfate powder) is added to an organic solvent (urethane solution) containing urethane. A slurry 7 is prepared.

  Next, one end portion 4 of the shaft rod 2 is immersed in the polyurethane slurry 7 and pulled up. Thereby, a drop-like polyurethane slurry (drop-like slurry) 8 adheres to the one end 4 of the shaft 2.

  Next, as shown in FIG. 3 (b), one end portion 4 of the shaft rod 2 on which the droplet slurry 8 is immersed and adhered is immersed in water 9 (warm water). In this immersion, the solvent of the organic solvent in the droplet slurry 8 is dissolved in water, so that the solvent is replaced with water, and the polyurethane is insolubilized and solidified. In addition, when the pore forming material is dissolved in water, the pore forming material is extracted and removed from the droplet slurry 8 before, during or after solidification. By completing the solidification of the polyurethane and the extraction of the pore forming material, the sponge body 3 is fixedly formed on the one end portion 4 of the shaft 2. Thereafter, one end 4 of the shaft rod 2 is pulled up from the water, the sponge body 3 is washed with water, dehydrated and dried.

  When the sponge body 3 made of polyvinyl alcohol resin is fixedly formed, a PVA slurry is prepared by adding a pore forming material (for example, starch) and sodium alginate to an aqueous solution of polyvinyl alcohol resin.

  Next, as in the case of urethane, a dipping slurry is dipped and attached to one end 4 of the shaft 2 and then dipped in a separately prepared primary reaction solution (mixed aqueous solution of calcium chloride and boric acid) (primary Reaction), one end 4 of the shaft rod 2 is pulled up from the primary reaction solution after a predetermined time, immersed in a secondary reaction solution (mixed aqueous solution of formalin and sulfuric acid) (secondary reaction), and one end portion of the shaft rod 2 after a predetermined time. 4 is pulled up from the secondary reaction solution. By the primary reaction and the secondary reaction, the polyvinyl alcohol resin is insolubilized (coagulated), and the pore-forming material is extracted and removed by washing the insolubilized polyvinyl alcohol resin. That is, the sponge body 3 is fixedly formed on the one end portion 4 of the shaft rod 2 by completing the extraction of the pore forming material. Finally, the sponge body 3 is dehydrated and dried.

  The sponge body 3 of the shaft-equipped sponge 1 has a skin layer 5 different from the internal structure on its surface. In the skin layer 5, the pore diameter of the continuous pores is small compared to the inside of the sponge body 3 and the porosity thereof is low. Therefore, it is possible to hold a large amount of liquid inside, and it is difficult for the liquid inside to flow out from the surface, so that desired water absorption performance and water supply performance can be obtained.

  Since the sponge body 3 is directly fixed to the one end portion 4 of the shaft rod 2, it is not necessary to form a hole for inserting the one end portion 4 of the shaft rod 2 in the sponge body 3 by post-processing. The complicated work of mounting the body 3 on the shaft 2 is also unnecessary.

  Further, as shown in FIG. 4A, a protrusion 11 may be provided on the outer surface of the one end portion 4 of the shaft rod 2. In this case, since the protrusion 11 prevents the sponge body 3 from being detached from the shaft rod 2, the durability of the shaft-equipped sponge 1 is improved.

  Further, as shown in FIG. 4B, the perforations 12 may be formed in the one end portion 4 of the shaft 2, and the sponge body 3 may be continuous through the perforations 12. In this case, since the sponge body 3 is continuous through the perforations 12, the sponge body 3 is unlikely to be detached from the shaft rod 2, and the durability of the sponge 1 with the shaft is improved.

  Moreover, as shown in FIG.4 (c), the axial rod 2 may be a pipe | tube shape where the internal diameter part 13 connects from one end side to the other end side. In this case, a liquid is injected in a pressurized state from the other end of the shaft rod 2 to which the sponge body 3 is not fixed to the inner diameter portion 13 of the shaft rod 2, and the surface of the sponge body 3 through the one end side of the shaft rod 2. The liquid can be supplied to the surface to be contacted with which the sponge body 3 comes into contact by flowing out of the liquid. Further, by sucking air from the other end side of the shaft rod 2, the liquid transferred from the contact symmetry surface to the sponge body 3 can be discharged to the outside through the inner diameter portion 13 of the shaft rod 2.

  Further, pretreatment such as primer treatment (primary treatment for applying a primer to the surface of the one end portion 4) is applied to the one end portion 4 of the shaft rod 2 before the slurry is immersed and adhered, and the affinity between the one end portion 4 and the sponge body 3 is applied. It is also possible to increase the fixing force of both by improving the property.

  In addition, it is possible to increase the fixing force between the one end portion 4 and the sponge body 3 by selecting a material that is difficult for the sponge body 3 to be detached as the material of at least one end portion 4 of the shaft rod 2. For example, a component that dissolves in a solvent for dipping slurry (a component that dissolves in DMF (N, N-dimethylformamide) used as a solvent for a dipping slurry when the sponge body 3 is formed of urethane (for example, polystyrene or urethane). Etc.)), and a shaft rod 2 made of a material whose surface is slightly dissolved by the solvent when immersed in the slurry, or a shaft rod made of a material having a surface structure in which the dipping slurry is slightly soaked (for example, a paper shaft used for a cotton swab) ) Can be used to increase the fixing force between the one end 4 and the sponge body 3.

  The sponge body 3 may be combined with a fibrous material. For example, as shown in FIG. 5 (a), the fibrous material 14 is fixed to the one end 4 of the shaft 2 and the dipping slurry is immersed and attached to the one end 4 of the shaft 2 together with the fibrous material 14, The sponge body 3 may be formed. In this case, the sponge body 3 covers the entire outer surface of the fibrous material 14. Alternatively, a short cut fibrous material may be mixed into the dipping slurry, and the slurry may be dipped and attached to the one end 4 of the shaft 2. In this case, the fibrous material is contained in the entire area of the sponge body 3.

  Moreover, as shown in FIG.5 (b) and FIG.5 (c), the hollow part 15 may be formed in the inside of the sponge body 3. FIG.

  Such a hollow portion 15 can be formed by using, for example, a water-soluble material (hollow forming material) having a characteristic of melting at high temperature and solidifying at low temperature. Specifically, the hollow forming material is heated and melted, and the hollow forming material is immersed and attached to the one end portion 4 of the shaft rod 2 by dipping and pulling up the one end portion 4 of the shaft rod 2 therein. Next, as described above, the dipping slurry containing the resin solution and the pore forming material is dipped and attached to the one end 4 of the shaft 2 to insolubilize the resin component of the attached slurry and to extract and remove the pore forming material. As a result, the sponge body 3 is directly fixed to the one end portion 4 of the shaft 2. The hollow forming material is dissolved in water by immersing the formed sponge body 3 in water, and is extracted and removed from the sponge body 3. In addition, when the resin component is insolubilized and the pore-generating agent is extracted and removed by immersing the slurry in water, the hollow forming material is also extracted and removed at the same time when the slurry is immersed in water. Thereby, the hollow part 15 is formed inside the sponge body 3.

  Further, as shown in FIGS. 6 and 7, at least a part of the skin layer 5 of the sponge body 3 may be cut off. For example, the internal structure may be exposed at the end surface 3a of the sponge body 3 by cutting the skin layer 5 (FIG. 6A), the internal structure is exposed at the end surface 3a of the sponge body 3, and the end surface of the shaft 2 May be exposed (FIG. 6B), and the internal structure may be exposed at the end surface 3a and the side surface 3b of the sponge body 3 (FIG. 6C). Moreover, as shown in FIG.6 (d), you may excise a part of skin layer 5 of the sponge body 3 in which the hollow part 15 was formed. Further, a longitudinal groove 16 (FIG. 7A) along the extending direction of the shaft rod 2 and a lateral groove 17 (FIG. 7B) intersecting with the extending direction of the shaft rod 2 are formed on the surface of the sponge body 3. Accordingly, a part of the skin layer 5 of the sponge body 3 may be cut off.

  When the internal structure of the sponge body 3 is exposed, the water absorption characteristics and water supply characteristics of the surface of the sponge body 3 change. Therefore, desired water absorption characteristics and water supply characteristics can be obtained by appropriately cutting the skin layer 5.

  Next, a modification of this embodiment will be described. In this modification, the sponge body 3 is formed separately from the shaft rod 2. The method for forming the sponge body 3 is the same as that of the above embodiment except that the shaft end 18 for forming the sponge is used instead of the shaft rod 2. That is, as shown in FIG. 8A, after the sponge body 3 is formed in the same manner as in the above-described embodiment using the sponge-forming shaft end portion 18 instead of the shaft rod 2 in the above-described embodiment, The sponge body 3 is pulled out from the portion 18. Then, as shown in FIG. 8 (b), by inserting one end 4 of the shaft rod 2 into the hole 19 of the sponge body 3 formed by pulling out the sponge body 3 from the shaft end 18, the shaft A sponge body 3 is attached to one end 4 of the rod 2. In this case, the shaft rod 2 and the hole 19 of the sponge body 3 may be fixed with an adhesive. The tip of the one end 4 of the shaft 2 is preferably tapered or curved. Moreover, it is preferable that the outer surface of the shaft end portion 18 has characteristics (shape, material, etc.) that make it easy to pull out the formed sponge body 3.

  In the above configuration, the hole 19 of the sponge body 3 is formed by pulling out the sponge body 3 from the shaft end 18, so that the hole 19 for inserting the one end 4 of the shaft rod 2 is post-processed by the sponge body. 3 is not required.

  Next, examples of the present invention will be described. Example 1 is an example in which a sponge body 3 made of polyurethane is formed on one end 4 of the shaft 2, and Example 2 is an example in which a sponge body 3 made of polyvinyl alcohol resin is formed. This is an example of forming a sponge body 3 having a hollow portion 15 inside. In the case where the sponge body 3 and the shaft rod 2 are formed separately, the sponge body 3 is formed using the sponge-forming shaft end portion 18 instead of the shaft rod 2, and then the shaft end portion 18 is used. The sponge body 3 may be pulled out.

Example 1
<Slurry configuration>
Polyurethane resin solution (30% solution): 100 g
Dimethylformamide (DMF): 100g
Sodium sulfate (neutral anhydrous bow glass): 150 g
Aliphatic polyhydric alcohol polyether polyol: 1g

<Formation of sponge body>
100 g of DMF was added to 100 g of wet polyurethane resin (ether type, solid content 30%) to obtain a homogeneous solution. Further, 150 g of sodium sulfate powder (150 mesh pass 99% or more) and 1 g of a polyhydric alcohol polyether polyol were added and mixed thoroughly to homogenize to obtain a slurry for dipping.

  One end (about 15 mm from the tip) of the shaft rod (made of nylon, φ2 × 150 mm) was dipped into the viscous slurry (dipping slurry) and pulled up. After pulling up, it was allowed to stand for a few seconds to a few dozen seconds while observing the state of the adhering liquid. At this time, the adhering liquid was kept so as not to contact the bottom or wall of the hot water container.

  It was left as it was for about 20-30 minutes, and the solidification of the urethane resin and the extraction of the bow glass as the pore forming material were performed. Subsequently, the sponge with the shaft of the present invention was obtained by pulling up from the warm water, thoroughly washing the whole with clean water, and further drying.

  The obtained sponge part (sponge body) had soft elasticity and developed quick absorbability by contact with water. Further, a skin layer different from the internal structure was confirmed on the surface of the obtained sponge part.

(Example 2)
<Slurry configuration>
Polyvinyl alcohol (degree of polymerization about 1700): 70 g
Polyvinyl alcohol (degree of polymerization about 500): 10 g
Starch (tapioca): 60g
Sodium alginate: 10g
Water: 850g

<Primary reaction solution>
Calcium chloride: 90g
Boric acid: 30g
Water: 2880g

<Secondary reaction solution>
Formalin (37% aqueous solution): 1080 g
Sulfuric acid (50% aqueous solution): 1200 g
Water: 1720g

<Formation of sponge body>
520 g of water was added to a mixture of 70 g of polyvinyl alcohol resin (completely saponified, degree of polymerization of about 1700) and 10 g of polyvinyl alcohol (degree of polymerization of about 500), and the mixture was heated and stirred to obtain a homogeneous solution (about 13% aqueous solution of polyvinyl alcohol). ). After this polyvinyl alcohol aqueous solution is cooled to room temperature, a separately prepared starch slurry (60 g tapioca starch + 90 g water) and an aqueous sodium alginate solution (sodium alginate 10 g + 240 g water) are thoroughly mixed and homogenized, and a slurry for dipping Got.

  Next, a dipping slurry was adhered to one end of the shaft rod by the same operation as described in Example 1, and then the separately prepared primary reaction solution (calcium chloride 3%, boric acid 1%, temperature 72 ° C.) was used. Soaked. The resin was solidified (pre-molded) for about 20 minutes as it was (primary reaction).

  Next, one end of the shaft rod was pulled up from the primary reaction solution, immersed in the secondary reaction solution (temperature 65 ° C.), and held in water for about 15 minutes (secondary reaction). Subsequently, one end of the shaft rod was pulled up from the secondary reaction solution, cooled with clean water, and thoroughly washed. By this washing, starch as a pore forming material was extracted and removed, and further dried to obtain a sponge with a shaft of the present invention.

  The obtained sponge part (sponge body) had soft elasticity and developed quick absorbability by contact with water. Further, a skin layer different from the internal structure was confirmed on the surface of the obtained sponge part.

(Example 3)
Polyoxyethylene glycol (molecular weight of about 8000) was placed in a container and heated to 80 ° C. to be in a molten state. The attached polyoxyethylene glycol was solidified by air cooling. Next, the solidified polyoxyethylene glycol was immersed in the dipping slurry described in Example 1, and thereafter the same operation as in Example 1 was performed. The solidified polyoxyethylene glycol is immersed in warm water (50 ° C.) and the slurry adhering and adhering to the shaft rod is allowed to stand, and in the process of solidifying the urethane resin and extracting the bow glass as the pore forming material, It was dissolved and extracted.

  The obtained sponge part (sponge body) expresses the same characteristics as the sponge body obtained in Example 1 except that it has a hollow part inside, and the surface of the obtained sponge part has its internal structure. A different skin layer was confirmed.

  The present invention is not limited to the above-described embodiment, its modifications, and examples described as an example, and it does not depart from the technical idea according to the present invention, other than the above-described embodiment. Various changes can be made within the range.

DESCRIPTION OF SYMBOLS 1 ... Sponge with a shaft, 2 ... Shaft rod, 3 ... Sponge body, 4 ... One end part of a shaft rod, 5 ... Skin layer, 11 ... Protrusion, 12 ... Perforation, 13 ... Inner diameter part, 14 ... Fibrous material, 15 ... Hollow part, 18 ... shaft end for sponge formation, 19 ... hole

Claims (12)

The internal structure a shafted sponge with a drop shape sponge body having a surface different skin layer on the end portion of the shaft rod,
The end of the shaft rod is dipped in a viscous slurry containing a resin solution and a pore-forming material and pulled up, thereby causing the viscous slurry to adhere to the end of the shaft rod as a drop- like slurry in the form of droplets. The slurry is immersed in water to insolubilize the resin component of the droplet slurry and the pore-forming material is extracted and removed, or the deposited droplet slurry is immersed in a predetermined reaction solution. after insolubilizing the resin component of the slurry, by extracting and removing the pore-forming substance by washing the dropwise slurry the insolubilized end dropwise shape sponge body of the axle is directly fixed form Sponge with a shaft characterized by that. The internal structure A method of manufacturing a shafted sponge with a drop shape sponge body having a surface different skin layer on the end portion of the shaft rod,
The end of the shaft rod is dipped in a viscous slurry containing a resin solution and a pore-forming material and pulled up, thereby causing the viscous slurry to adhere to the end of the shaft rod as a drop- like slurry in the form of droplets. The slurry is immersed in water to insolubilize the resin component of the droplet slurry and the pore-forming material is extracted and removed, or the deposited droplet slurry is immersed in a predetermined reaction solution. after insolubilizing the resin component of the slurry, by extracting and removing the pore-forming substance by washing the dropwise slurry said insolubilized, be directly fixed form droplets shape sponge body to an end of the axle A method for producing a sponge with a shaft characterized by the above. The internal structure a shafted sponge with a drop shape sponge body having a surface different skin layer on the end portion of the shaft rod,
The sponge body attaches the viscous slurry to the shaft end portion as a drop slurry by dipping the shaft end portion for sponge formation into a viscous slurry containing a resin solution and a pore forming material. Immersing the adhered droplet slurry in water to insolubilize the resin component of the droplet slurry and extracting and removing the pore-forming material; or immersing the adhered droplet slurry in a predetermined reaction solution. after insolubilizing the resin component of the drops form slurry Te, by extracting and removing the pore-forming substance by washing the dropwise slurry said insolubilized, drop-shaped in the axial said shaft end separately from the rod Jo the formed, the sponge member into the hole of the sponge body formed by drawing from the shaft end, the shaft with a sponge, wherein the end portion of the shaft rod is inserted.   The sponge with a shaft according to claim 1 or 3, wherein a protrusion is provided on an outer surface of an end portion of the shaft rod.   2. The sponge with a shaft according to claim 1, wherein an end portion of the shaft rod has a perforation, and the sponge body is continuous through the perforation.   The shaft-type sponge according to claim 1 or 3, wherein a hollow portion is formed inside the sponge body.   The sponge with a shaft according to claim 1 or 3, wherein the sponge body is combined with a fibrous material.   The sponge with a shaft according to claim 1 or 3, wherein at least a part of the skin layer of the sponge body is cut off.   The sponge with a shaft according to claim 1 or 3, wherein the shaft rod has a tube shape.   The sponge according to claim 1 or 3, wherein the sponge body is made of urethane. A sponge body having a hole into which an end of the shaft rod is inserted,
The sponge body attaches the viscous slurry to the shaft end portion as a drop slurry by dipping the shaft end portion for sponge formation into a viscous slurry containing a resin solution and a pore forming material. Immersing the adhered droplet slurry in water to insolubilize the resin component of the droplet slurry and extracting and removing the pore-forming material; or immersing the adhered droplet slurry in a predetermined reaction solution. The resin component of the droplet slurry is insolubilized, and then the pore-forming material is extracted and removed by washing the insolubilized droplet slurry, so that the skin layer different from the internal structure is provided on the surface. Formed at the shaft end,
The hole of the sponge body is formed by pulling out the sponge body from the shaft end portion. A method for producing a sponge body having a hole into which an end of a shaft rod is inserted,
By immersing the shaft end portion for sponge formation into a viscous slurry containing a resin solution and a pore-forming material and pulling it up, the viscous slurry is attached to the shaft end portion as a droplet slurry, and the attached droplet shape The slurry is immersed in water to insolubilize the resin component of the droplet slurry and the pore-forming material is extracted and removed, or the adhered droplet slurry is immersed in a predetermined reaction solution. after insolubilizing the resin component, said by insolubilized dropwise slurry was washed to extract and remove the pore-forming material, the internal structure and droplet shape sponge body in a state of having a surface different skin layer A sponge body manufacturing method, comprising: forming the sponge body from the shaft end portion after forming the sponge body on the shaft end portion.

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