JP2006020534A - Liquid absorbing material and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid absorbing material with improved initial absorption rate while enjoying merit of a compression molded high density stylized liquid absorbing coarse grain by solving the problem of the reduction of absorbing property on the surface of the coarse grain. <P>SOLUTION: The invention relates to the liquid absorbing material comprising the liquid absorbing coarse granular materials 1 stylized into grains with a circular form, a polygon form, etc., by compression molding, wherein the liquid absorbing material 1 has a continuous circular broken surface area 6 on the peripheral surface 4 on circumferential direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to liquid absorbing coarse particles which are used for animal excrement treatment or human or pet excrement treatment, in particular, liquid absorbent coarse particles granulated into a fixed shape by compression molding. The present invention relates to a material and its manufacturing method.

  The present invention also relates to a liquid absorbent material comprising the same liquid-absorbing coarse particles used for the treatment of human vomit and a method for producing the same.

  The present invention also relates to a liquid absorbent material packed in a sandbag used for improvement of wetlands and water shielding during flooding of a river, particularly a liquid absorbent material composed of liquid absorbent coarse particles and a method for producing the same.

  Excrement treatment material has been coarsely granulated from the past, and this is spread flatly on the toilet and used for urination of cats, indoor dogs, etc., and the excrement treatment material for animals can be removed and replaced by removing coarse particles that have absorbed urine. Is well known.

  However, the liquid-absorbing coarse particles that form these excrement disposal materials have an irregular shape, and the overall density of the liquid is sparse and excessive voids, leading to a decrease in liquid retention and an increase in the liquid absorption area. Tend to.

  On the other hand, Patent Document 1 provides a technique for compressing and shaping an animal urination treatment material comprising a water-absorbing coarse granular material while sealing a molding cavity with first and second compression molds (sealed mold). .

  The coarse granular material having water absorption granulated into a regular shape by this compression molding achieves the regularization of the excrement disposal material, and also achieves a high density of the coarse granular material, thereby effectively solving the above problem.

On the other hand, the water-absorbing coarse particles granulated into a regular shape by the above compression molding are subjected to a compression force of several tons per square centimeter during compression molding. Cannot be avoided and this has the problem of reducing the water absorption action on the surface, in particular the initial absorption speed.
Japanese Patent No. 2833697

  The present invention effectively solves the above-described problems of the compression-molded coarse particles while at the same time enjoying the advantages of the coarse-grained products granulated into a fixed shape by the above-described compression molding. The present invention provides a liquid absorbent material and a manufacturing method thereof.

  The present invention relates to a liquid absorbent material comprising a liquid-absorbing coarse granular material granulated into a fixed shape by compression molding, and forms an annular fracture surface zone continuous in the circumferential direction on the peripheral surface of the liquid absorbent coarse granular material. In addition, a function of promoting liquid absorption in the annular fracture surface zone is provided, so that rapid liquid infiltration into the inside of the high-density granular material formed by compression molding and a good water retention function in the inside are obtained. is there.

  As another example, an annular projecting portion continuous in the circumferential direction is formed on the circumferential surface of the liquid-absorbing coarse granular material, an annular fracture surface zone continuous in the circumferential direction is formed on the circumferential surface of the annular projecting portion, and the thin wall While receiving liquid at the annular overhanging portion, the function of promoting liquid absorption is provided in the annular fracture surface zone of the circumferential surface of the annular overhanging portion, so that liquid infiltration into the interior of the high-density granular material and water retention function are obtained. It is a thing.

  The liquid absorbent material is formed into a coarse particle connecting plate in which individual liquid absorbing coarse particles are connected to each other on the peripheral surface, and the individual liquid absorbing coarse particles are divided at the connecting portion to form the coarse granular material. It is obtained by a method of forming an annular fracture surface zone continuous in the circumferential direction by the above-mentioned division on the peripheral surface of the film.

  As described above, according to the present invention, while enjoying the advantages of the liquid-absorbing coarse granular material that has been standardized to a high density by compression molding, the problem of liquid absorption deterioration on the surface of the coarse granular material, which is the problem, is solved. It is possible to effectively solve the problem, and in particular to increase the initial absorption speed in a compression molding type coarse granular material.

Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.
The present invention relates to animal excrement disposal materials, sandbags, or vomit treatment materials, and in particular to liquid absorbent materials comprising liquid-absorbing coarse granules granulated into a fixed shape by compression molding.

  As a raw material (hereinafter referred to as a liquid absorbing material 1 ') that imparts liquid absorbency to the liquid absorbent coarse granular material 1, various pulps (virgin pulp, waste paper pulp, pulp sludge that has passed through papermaking in papermaking), paper pieces, Paper powder, sawdust, wood powder, okara, rice husk, coffee bean husk, coffee bean residue, tea husk, corn residue, activated carbon and so on.

  These liquid-absorbing materials 1 ′, that is, the liquid-absorbing coarse particles 1, can be blended with materials for providing a required additional function. As a compounding material that adds weight mainly to the coarse granular material 1, it is composed of powders such as calcium carbonate, talc, silica gel, clay, zeolite, bentonite, lime, kaolin, barite, anhydrous borate, sodium chloride, gypsum and the like. One or more inorganic fillers can be selectively blended.

  For example, anhydrous bo-nitrate and sodium chloride are suitable as weight-added materials, and are effective as this kind of liquid absorbent material that is easily dissolved in water and required to be able to flow into the toilet. Suitable for cases.

  One or more kinds of powders such as starch, carboxymethyl cellulose, a water-absorbing polymer, and gelatin are selectively blended as an additive mainly for adding the coagulability at the liquid contact site.

  The liquid absorbing material 1 'formed by blending the above blended material or the liquid absorbent material 1' not blended is compression-molded by clamping the first compression molding die 2 and the second compression molding die 3 described later and granulated into a fixed shape. .

  As shown in FIG. 1, the liquid-absorbing coarse granular material 1 compression-molded into the above-mentioned regular shape has a polygonal peripheral surface 4 such as a quadrangle, hexagon, or octagon, and upper and lower end surfaces 5 of the polygon.

  Alternatively, as shown in FIG. 2, the liquid-absorbing coarse granular material 1 compression-molded into the above-described regular shape has a circular peripheral surface 4 such as an ellipse or a perfect circle, and upper and lower end surfaces 5 of the same circle.

  As shown in FIG. 2C, the upper and lower end surfaces 5 are shaped into a convex curved shape that bulges outward. Or as shown to FIG. 1C, the said upper-lower-end surface 5 is shaped in the concave curved shape which inflated inward. Alternatively, the upper and lower end surfaces 5 are shaped into a flat surface.

  The effect obtained by shaping the upper and lower end surfaces 5 of the liquid-absorbing coarse granular material 1 into a concave or convex shape is clarified in Patent Document 1.

  The liquid-absorbing coarse granular material 1 is compression-molded by clamping the first and second compression molds 2 and 3 from the direction facing the upper and lower end surfaces 5. In other words, the first and second compression molds 2 and 3 are clamped in the axial direction passing through the centers of the upper and lower end surfaces 5 to compress the coarse granular material 1.

  An annular fracture surface zone 6 continuous in the circumferential direction is formed on the peripheral surface 4 of the liquid absorbent coarse granular material 1. The annular fracture surface zone 6 is continuous in a circular or polygonal shape in the circumferential direction.

  As a preferred example, an annular bulging portion 7 that is continuous in the circumferential direction is formed on the circumferential surface 4 of the liquid-absorbing coarse granular material 1, and the circumferential surface of the annular bulging portion 7 is made to be a fracture surface that is continuous in the circumferential direction. 6 is formed.

  As shown in FIGS. 1 and 2, the annular projecting portion 7 and the annular fracture surface zone 6 are disposed in the central zone of the peripheral surface 4 of the liquid-absorbing coarse granular material 1.

  Alternatively, as shown in FIG. 3, the annular projecting portion 7 and the annular fracture surface zone 6 are disposed at one end of the peripheral surface 4 of the liquid-absorbing coarse granular material 1, that is, at the end continuous with one of the upper and lower end surfaces 5. .

  Next, an example of a method for producing the liquid-absorbing coarse granular material 1 having the annular fracture surface zone 6 will be described with reference to FIG.

  Reference numerals 2 and 3 denote a first compression mold 2 and a second compression mold 3 which are arranged to face each other, and have a plurality of molding recesses 8 on the opposing surface of the first compression mold 2, A plurality of molding recesses 9 are provided on the opposing surface of the molding die 3, and the molding recesses 8 and 9 are arranged facing each other at the same pitch, and are opened on the opposing surface.

  As shown in FIG. 5A, a mask 11 having windows 10 having the same pitch as the molding recesses 8 and 9 is placed on the opposing surface (clamping surface) of the first compression molding die 2. The molding recess 8 is made to face, the raw material (liquid absorbing material 1 ′) is charged through the window 10, and the inside of the window 10 and the molding recess 8 is filled with the liquid absorbing material 1 ′. The surface of the liquid absorbing material 1 ′ is compressed using a spatula while being leveled.

  Next, as shown in FIG. 5B, by removing the mask 11, the liquid absorbing material 1 ′ is raised from the molding recess 8 of the first compression molding die 2.

  Next, as shown in FIG. 5C, the first compression mold 2 and the second compression mold 3 are clamped, and the liquid absorbent material 1 ′ is compression molded into a fixed shape by the molding recesses 8 and 9.

  At the time of clamping, a slight gap 16 is formed between the opposing surfaces of the first and second compression molds 2 and 3, in other words, a slight gap is formed around the opening surface of the molding recesses 8 and 9. 16 is formed, and the liquid absorbing material 1 ′ interposed in the gap 16 is compressed on the opposing surfaces of the peripheral areas of the molding recesses 8 and 9, and the suction molded by the molding recesses 8 and 9 is compressed. A connecting portion 12 that connects the peripheral surfaces of the liquid coarse particles 1 is formed.

  Accordingly, as shown in FIG. 5D, a coarse granular material connecting plate 13 is formed in which each group of the liquid absorbing coarse granular materials is connected to each other on the peripheral surface.

  The connecting portion 12 is thinner than the thickness between the upper and lower end surfaces 5 of the liquid-absorbing coarse granular material 1, and is disposed in a clamping surface area between the opposing surfaces of the first and second compression molding dies 2 and 3. Therefore, the connection part 12 is arrange | positioned in the center part zone | band of the surrounding surface 4 of the liquid-absorbing coarse granular material 1 shape | molded by the recessed parts 8 and 9 for shaping | molding.

  As shown in FIG. 9, the connecting portion 12 in the peripheral area of the liquid-absorbing coarse granular material 1 in the coarse particle connecting plate 13 is divided by a cutting means 15 having a number of cutting blades 14, and the liquid-absorbing coarse granular material. The annular fracture surface zone 6 continuous in the circumferential direction is formed on the circumferential surface of 1.

  The cutting blade 14 protrudes from the surface of the cutting means 15, presses the blade edge against the central portion of the connecting portion 12, and breaks the individual liquid absorbent coarse particles 1.

  Thus, an annular fracture surface zone 6 continuous in the circumferential direction is formed in the central zone of the peripheral surface of the liquid-absorbing coarse granular material 1. As shown in FIGS. 1 and 2, the annular fracture surface zone 6 is continuous in a circular or polygonal shape in the circumferential direction.

  Further, by causing the cutting blade 14 to act on the central portion of the connecting portion 12, an annular protruding portion 7 that slightly protrudes from the peripheral surface 4 of the liquid-absorbing coarse granular material 1 and continues in the circumferential direction is formed, An annular fracture surface zone 6 is formed by making the circumferential surface of the annular projecting portion 7 a fracture surface continuous in the circumferential direction.

  Next, another example of the method for producing the liquid absorbent coarse granular material 1 having the annular fracture surface zone 6 will be described with reference to FIG.

  Reference numerals 2 and 3 denote a first compression molding die 2 and a second compression molding die 3 which are arranged so as to face each other. A plurality of molding recesses 8 are provided on the opposing surface of the first compression molding die 2, and the second compression molding die 2 is provided. The opposing surface of the mold 3 is a pressing surface 9 'made of a flat surface.

  As shown in FIG. 6A, a mask 11 having windows 10 having the same pitch as that of the molding recesses 8 and 9 is placed on the opposing surface (clamping surface) of the first compression molding die 2. The molding recess 8 is made to face, the raw material (liquid absorbing material 1 ′) is charged through the window 10, and the inside of the window 10 and the molding recess 8 is filled with the liquid absorbing material 1 ′. The surface of the liquid absorbing material 1 ′ is compressed using a spatula while being leveled.

  Next, as shown in FIG. 6B, by removing the mask 11, the liquid absorbing material 1 ′ is raised from the molding recess 8 of the first compression molding die 2.

  Next, as shown in FIG. 6C, the first compression mold 2 and the second compression mold 3 are clamped, and the liquid absorbent 1 ′ is formed into the molding recess 8 and the second compression mold 2 of the first compression mold 2. The compression molding die 3 is compression-molded into a fixed shape by a pressing surface 9 ′ composed of a flat surface.

  At the time of clamping, a slight gap 16 is formed between the opposing surfaces of the first and second compression molds 2, 3. In other words, the periphery of the opening surface of the molding recess 8 of the first compression mold 2. A slight gap 16 is formed between the area and the pressure surface 9 ′ of the second compression molding die 3, and the liquid absorbing material 1 ′ interposed in the gap 16 is opposed to the circumferential area of the molding recess 8. A connecting portion 12 that connects the peripheral surfaces of the liquid-absorbing coarse granular material 1 that is compressed on the surface and is compression-molded by the molding recess 8 is molded.

  Therefore, as shown in FIG. 6D, a coarse granular material connecting plate 13 in which the individual groups of the liquid absorbing coarse granular materials are connected to each other on the peripheral surface is formed.

  The connecting part 12 is thinner than the thickness between the upper and lower end surfaces 5 of the liquid-absorbing coarse granular material 1 and is disposed in the clamping surface area between the opposing surfaces of the first and second compression molding dies 2, 3. 12 is disposed at one end of the peripheral surface 4 of the liquid-absorbing coarse granular material 1 formed by the molding recess 8, that is, at the end continuous with one of the upper and lower end surfaces 5.

  As shown in FIG. 10, the connecting part 12 in the peripheral area of the liquid-absorbing coarse particle 1 in the coarse particle connecting plate 13 is divided by a cutting means 15 having a large number of cutting blades 14, and the liquid-absorbing coarse particle The annular fracture surface zone 6 that is continuous in the circumferential direction is formed at one end of the circumferential surface of 1.

  The cutting blade 14 protrudes from the surface of the cutting means 15 and presses the cutting edge against the central portion of the connecting portion 12 to break it, thereby dividing the individual liquid-absorbing coarse particles 1.

  Thus, an annular fracture surface zone 6 continuous in the circumferential direction is formed in the end zone of the peripheral surface of the liquid-absorbing coarse granular material 1. As shown in FIGS. 3 and 4, the annular fracture surface zone 6 is continuous in a circular or polygonal shape in the circumferential direction.

  Further, by causing the cutting blade 14 to act on the central portion of the connecting portion 12, an annular protruding portion 7 that slightly protrudes from the peripheral surface 4 of the liquid-absorbing coarse granular material 1 and continues in the circumferential direction is formed, An annular fracture surface zone 6 is formed by making the circumferential surface of the annular projecting portion 7 a fracture surface continuous in the circumferential direction.

  The coarse particle connecting plate 13 is formed so that a large number of coarse particles 1 are arranged in a plurality of rows. Alternatively, the connecting plate 13 is formed so that a large number of coarse particles 1 are arranged in a row.

  When a large number of coarse particles 1 are arranged in a row, the coarse particles 1 are connected to each other only on the side surfaces adjacent to each other, and the fracture surface zone 6 is formed by dividing the connecting portion 12.

  On the other hand, the overhanging portion 7 is extruded on the side surface orthogonal to the side surface on which each coarse granular material 1 is adjacent, but the end surface of the overhanging portion 7 is not compression molded and has a fracture surface. Therefore, the annular fracture surface zone 6 is formed by the fracture surface formed by the division (breaking) and the fracture surface that is not divided.

  The first and second compression molds 2 and 3 are opposed to each other in the vertical direction, and the second compression mold 3 is moved down to perform the compression molding. A circular rotary mold arranged oppositely, a liquid absorbing material 1 'is supplied between the two rotary molds from above the two rotary molds, and the molding recess 8 is formed on the peripheral surface of both rotary molds. , 9 can be charged, and a molding method can be adopted in which compression molding is continuously performed between the opposing surfaces.

  As described above, the water-absorbing coarse particles shown in Patent Document 1 cannot avoid excessive densification and smoothing of the entire surface, and this has a problem of reducing the moisture absorption action on the surface, especially the initial absorption speed. However, the liquid-absorbing coarse granular material 1 formed by the method illustrated in FIGS. 5 and 6 promotes liquid absorption at the annular fracture surface zone 6 formed on the peripheral surface 4 and is compression-molded. A rapid liquid infiltration into the inside of the high-density granular material 1 and a good water retaining function in the inside can be achieved.

  In addition, the liquid is received by the thin annular projecting portion 7 and the function of accelerating liquid absorption is provided in the annular fracture surface zone 6 on the circumferential surface of the annular projecting portion 7 so that the liquid infiltrates into the high-density granular material 1. And you can get water retention function.

A is a perspective view of a liquid absorbent material that has been compression-molded into a polygon and granulated, B is a plan view thereof, C is a side view thereof, and shows an example in which an annular fracture surface zone is formed in the central zone of the peripheral surface . A is a perspective view of a liquid absorbent material that is compression-molded into a circle and granulated, B is a plan view thereof, C is a side view thereof, and shows an example in which an annular fracture surface zone is formed in a central zone of a peripheral surface. A is a perspective view of a liquid absorbent material that has been compression-molded into a polygon and granulated, B is a plan view thereof, C is a side view thereof, and shows an example in which an annular fracture surface zone is formed in the end zone of the peripheral surface . 1A is a perspective view of a liquid absorbent material that has been compression-molded into a circle and granulated; FIG. 3B is a plan view thereof; FIG. 3C is a side view of the same; FIGS. 3A to 3D are cross-sectional views illustrating the liquid absorbent material compression molding method shown in FIGS. FIGS. 5A to 5D are cross-sectional views illustrating the method of compression molding of the liquid absorbent material shown in FIGS. The top view of the coarse-grained material connection board compression-molded in the polygon by the shaping | molding method of FIG. 5, FIG. The top view of the coarse-grained material connection board compression-molded circularly by the shaping | molding method of FIG. 5, FIG. Sectional drawing which shows the process of dividing | segmenting the coarse-grained material connection board which connected the liquid-absorbing coarse-grained material group in the peripheral surface center zone | band into each liquid-absorbing coarse-grained material. Sectional drawing which shows the process of dividing | segmenting the coarse-grained material connection board which connected the liquid-absorbing coarse-grained material group in the peripheral surface edge part zone | part to each liquid-absorbing coarse granular material.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Liquid absorbing coarse granular material, 1 '... Liquid absorbing material, 2 ... 1st compression molding die, 3 ... 2nd compression molding die, 4 ... Circumferential surface, 5 ... Upper-lower-end surface, 6 ... Annular fracture surface zone, 7 DESCRIPTION OF SYMBOLS ... Ring overhang | projection part, 8, 9 ... Recess for shaping | molding, 9 '... Pressure surface, 10 ... Window, 11 ... Mask, 12 ... Connection part, 13 ... Coarse-grained material connection plate, 14 ... Cutting blade, 15 ... Cutting means 16 ... Gap.

Claims (3)

Liquid absorption characterized by comprising a liquid-absorbing coarse granular material granulated into a fixed shape by compression molding, and forming an annular fracture surface zone continuous in the circumferential direction on the peripheral surface of the liquid-absorbing coarse granular material Wood. It consists of coarse particles having liquid absorbency granulated into a fixed shape by compression molding, and has a circumferentially extending annular bulging portion on the circumferential surface of the liquid absorbing coarse granular material, and the circumferential surface of the annular bulging portion Forming an annular fracture surface zone that is continuous in the circumferential direction. A method for producing a liquid-absorbing coarse granular material granulated into a regular shape by compression molding, and forming a coarse-particle connecting plate in which the individual liquid-absorbing coarse particle groups are connected to each other on the circumferential surface. In addition, the liquid absorbent coarse granular material is divided at the connecting portion to form an annular fracture surface zone continuous in the circumferential direction by the division on the peripheral surface of the coarse granular material. .

Images