The utility model content
The problem that utility model will solve
Yet the sanitary sand of record is to be purpose with the urine that absorbs animal apace in the patent documentation 1, because it is shaped to pellet shapes about diameter 2mm~6mm, thus disperse outside plastic containers easily, but also roll easily.Therefore or it is first-class and take the sanitary sand of container out of to stick to bottom of certain animals' feet, diffuses to wider scope easily.
The utility model proposes in view of above-mentioned problem, and its purpose is to provide: when having excellent absorbing capacity and deodorizing capability, also be difficult to roll, and be difficult to be diffused into the animal litter of wider scope.The purpose of this utility model also is the sanitary sand that provides following: be difficult to adhere on the bottom of certain animals' feet, and animal is difficult to take sanitary sand out of container coming in and going out when storing the container of sanitary sand.
Solve the method for problem
Present inventors conscientiously study repeatedly in order to solve above-mentioned problem, found that: non-spherical by being shaped to based on the shot-like particle of silica gel, and can solve above-mentioned problem, thereby finish the utility model.More specifically, the utility model provides following sanitary sand:
(1) a kind of animal litter is formed by numerous shot-like particles, and wherein aforementioned shot-like particle is non-spherical.
Being shaped as of the shot-like particle of the formation animal litter that the utility model relates to " non-sphere ", except be shaped to intentionally " non-spherical ", the material that finally reaches the shape with " non-spherical " is also contained in the utility model.So-called in the utility model " non-spherical " is meant that the flat board that will place sanitary sand, can be towards any direction rolling shape when any direction moves.Become " non-spherical " by the shape that makes shot-like particle, the animal litter that is difficult to roll and can not be diffused into wider scope can be provided.
(2) as described above (1) record animal litter, wherein the maximum outside diameter of aforementioned shot-like particle is 3mm-20mm.
There is no particular limitation for the size of shot-like particle, and preferred maximum outside diameter is 3mm-20mm, more preferably 6mm-10mm.If maximum outside diameter is about about 10mm, then the space between the shot-like particle is bigger, and therefore, the urine of animal sees through this space and shifts to the imbibition thin slice that is arranged under the shot-like particle rapidly, so be particularly preferred.In addition, owing to be difficult to stick on the bottom of certain animals' feet, when the container of shot-like particle is stored in animal discrepancy, can also reduce the possibility of shot-like particle being taken out of container.On the other hand, if shot-like particle is too small, then the space between the shot-like particle diminishes, and the liquid permeability will reduce, and the life-span of sanitary sand will shorten.In addition, the thickness of shot-like particle is preferably 5mm-12mm, more preferably 5mm-9mm.
(3) as the animal litter of record in (1) or (2), wherein aforementioned shot-like particle is for slightly cylindric, and the central authorities of both ends of the surface protrude.
There is no particular limitation for the concrete shape of shot-like particle, but wear and tear in order to prevent phase mutual friction between the shot-like particle and produce dust, the less shape of shape preferred angle of shot-like particle.Enumerating concrete example has: the lateral section is the polygon prismatic of triangle, quadrangle, star, annular, rhombus, hexagon etc., polyhedron such as positive tetrahedron, regular hexahedron, and these are removed the shape at angle, slightly columned shape, the central portion that the central authorities of slightly columned both ends of the surface protrude protrudes the shape of shape, the central portion depression shape of the concavity of slightly columned both ends of the surface etc.If central portion is the plane, then the planar section at shot-like particle is adjacent to mutually, liquid permeability variation.In addition, if central portion depression, then liquid retention is at recess, liquid permeability variation.So preferred shape is the shape that the central portion of central authorities' protrusion of slightly columned both ends of the surface protrudes shape.
The animal litter of each record of (1) (4) as described above~(3), wherein the liquid absorptive amount in per 3 seconds of aforementioned shot-like particle is the 20%-70% of maximum liquid absorptive amount, and 0.3 times-4.0 times of the aforementioned maximum liquid absorptive amount weight that is aforementioned shot-like particle.
Each shot-like particle that constitutes sanitary sand can suppress the infiltration rate of liquid.Therefore, liquid at first passes the space between the shot-like particle and passes through rapidly.And remain in the liquid of particle surface, be absorbed in the shot-like particle along with the time.Therefore, moisture content is difficult to remain in the surface of shot-like particle, keeps dry and comfortable state easily.
" the liquid absorptive amounts in per 3 seconds " in this specification are to press order shown in the example 1) to 5) value measured.
1) takes by weighing 100g shot-like particle shown in Figure 11 10, put into control water receptacle 402 (for example bamboo strainer), push down from above as scheelite with plate 403 (for example corrosion resistant plate);
2) in the tank 401 of filling physiological saline 404, the degree of depth that can fully immerse with shot-like particle 10 was soaked control water receptacle 402 together 3 seconds;
3) take out control water receptacle 402, remove plate 403, (use the product of water conservation multiplying power more than 4 times with abundant paper handkerchief.The water that must will splash down is not retained ground and is directly absorbed.For example, preferably use kimtowel: registration mark, CRECIA corporate system.) encase shot-like particle, remove the unnecessary water droplet of remained on surface;
4) move on to again on the new paper handkerchief, (3 seconds are when measuring, because the absorption of remained on surface water droplet can produce evaluated error, so carry out wiping fast to remove water droplet.Minute was undertaken by the time shown in the table 1.);
5) weight-100g after the wiping is as the liquid absorptive amount of every 100g shot-like particle.
In addition, so-called " maximum liquid absorptive amount " is " per 10 minutes liquid absorptive amount ", except that above-mentioned " 3 second " changed into " 10 minutes ", tries to achieve with same method.
Table 1
|
Required time |
From measuring the time of beginning |
Immerse tank |
3.0 second |
3.0 second |
Take out, put into kimtowcl |
2.0 second |
5.0 second |
Wipe remaining moisture from being covered with kimtowel |
3.0 second |
8.0 second |
Move on to new kimtowel again |
5.0 second |
13 seconds |
Wipe water droplet fully |
10 seconds |
23 seconds |
(5) as the animal litter of each record of (1)~(4), wherein aforementioned numerous all liquid transmitances of shot-like particle be 60% and more than.
The liquid transmitance of present sanitary sand is, is 27% under the situation of coagulating type paper sand (being formed by paper pulp and high-absorbable resin, starch) (a); (b) be 50% under the situation of non-coagulating type (forming) by paper pulp and calcium carbonate; (c) be 7% under the situation of the water-fast silica gel of initial stage moisture content 5%, particle diameter 3mm~3.5mm; Therewith relatively, in the utility model, all liquid transmitances of shot-like particle be 60% and more than, therefore, liquid is easily by the gap between the shot-like particle, and is very effective during particularly with the coupling of imbibition thin slice.In addition, more preferably the liquid transmitance of sanitary sand of the present utility model be 70% and more than, further preferred 80% and more than.
[test method of liquid transmitance]
" liquid transmitance " in this specification is to press the order 1 shown in the example) to 6) value measured.
1) as shown in figure 12, measures the pet absorbent sheet 503 (products that preferably possess the aftermentioned rerum natura.For example, weight A preferred use " deosheet ": registration mark, UnicharmPetCare Co., Ltd. system);
2) with the shot-like particle 10 flat cylinders 501 (, preparing for example cylinder of diameter 75mm * degree of depth 30mm) of completely filling for the shot-like particle 10 of filling degree of depth 30mm;
3) 20.0g physiological saline 404, drip from the position of the high 30mm central part of shot-like particle near with the speed that dripped off in 10 seconds by funnel 502;
4) drip back removal shot-like particle 10 and cylinder 501 (during removal, in order not cause the transfer of excessive moisture between shot-like particle 10 and the pet absorbent sheet 503, put plastic plate on cylinder top,, remove shot-like particle 10 and cylinder 501 afterwards again) with 503 upsets of pet absorbent sheet;
5) the weight B of mensuration pet absorbent sheet 503;
6) establish 100 * (B-A)/20=liquid percent of pass.
As shown in figure 13, place pet absorbent sheets 503 along 45 degree slopes 504, the physiological saline of 5ml is in 1 second from high 5cm and drips, the length w that preferred this moment, liquid was flowed through at 100mm with interior product.In addition, thin slice soaks 10 minutes in physiological saline after, mention, hang and removed to control water in 10 minutes, use the weight before the weight of dewaterer (90G) dehydration after 90 seconds deducts dehydration afterwards, be moisture-holding capacity, preferably use the product of moisture-holding capacity more than 200g of 45cm * 34cm size.
In addition,, also can make the size that is fit to grain, the draining board of leakage the best, be paved with the state estimating aforesaid liquid transmitance of shot-like particle 30mm because be to use inserting thin slice on the draining board underlay of sanitary sand originally.
(6) as the animal litter of each record of (1)~(5), the moisture content wherein aforementioned shot-like particle is placed 24 hours in 25 ℃, the atmosphere of humidity 50% after is 3 weight %-15 weight %.
Remain on 3 weight %-15 weight % by initial stage moisture content, be preferably 4 weight %-10 weight %, can make liquid, can also absorb moisture residual on the shot-like particle simultaneously rapidly by shot-like particle with aforementioned shot-like particle.Therefore, can be easily the surface of shot-like particle be kept dry and comfortable state, thereby can reuse for a long time.
(7) as the animal litter of each record of (1)~(6), wherein aforementioned shot-like particle is to obtain by the silica gel powder is carried out compression forming with the mixture that is the adhesive of main component with the Ludox.
As the main component of shot-like particle, can use silica gel (A type, Type B, C type), reach bentonite, kaolin, zeolite etc., the native fiber of micro mist wood fragments powder, micro mist shredded paper slurry etc. etc.Particularly preferably be, the mineral after the imbibition carry out the material that moisture is emitted under the indoor conditions (25 ℃, humidity 50%) of nature, Type B silica gel, C type silica gel, zeolite, wood powder, pulp powder are arranged.On the characteristic of these and the coupling of pet absorbent sheet,, preferably emit the liquid after once absorbing and can reuse in order to use for a long time.
Wherein, shot-like particle is preferably by carrying out compression forming with silica gel powder and the mixture that with the Ludox is the adhesive of main component.Thus, can obtain being non-spherical, but the sanitary sand with high rigidity.In addition, owing to use silica gel, so absorbability, deodorization and liquid permeability excellence.So compression forming is aspheric sanitary sand, compare with the sanitary sand that mixture is rotated granulating, and dimensionally stable, excremental through performance of animal and absorbent properties are stable.This silica gel powder is mixed with the adhesive that with the Ludox is main component carried out the shot-like particle that the moulding compression obtains, and has and the equal absorbent properties of resistance to water silica gel (FNG silica gel), even suction can not broken yet.Therefore, sanitary sand of the present utility model and the coupling of imbibition thin slice are effective especially.
(8) as the animal litter of (7) record, wherein aforementioned mixture also contains the fibrous material that fibre length is 20 μ m-500 μ m.
And nonessential use fibrous material, but when being mixed into fibrous material in the shot-like particle, can playing the effect of adhesive, thereby can keep the shape of sanitary sand, and improve hardness.In addition, can also reduce percentage of damage when compacting shape machine takes out widely.On aspect this, also can sneak into heat-fusible adhesive and replace fibrous material to the silica gel powder, if but the addition of heat-fusible adhesive is very few, just can not bring into play function as adhesive, if addition is excessive, then the absorbent properties of sanitary sand will reduce.Relative therewith, because fibrous material has water imbibition, then can adjust the absorbability of sanitary sand by the mixed proportion of adjusting fibrous material.But, owing to use fibrous material can reduce the liquid permeability, the mixed proportion of regulating fibrous material so be necessary to consider the balance of absorbability and liquid permeability.
The preferred fibre length of fibrous material is 20 μ m-500 μ m, more preferably 50 μ m-150 μ m.If fibre length is long, then is difficult to evenly mix, thereby causes the shape hold facility of sanitary sand to reduce with the silica gel powder.As the example of concrete fibrous material, except that paper pulp, can enumerate PP fiber, PET fiber and artificial silk etc.Especially preferably use, for example, 100 orders by 95% and more than, just, the ratio that by the aperture is the sieve of 0.15mm is the paper pulp more than 95%.In addition, with respect to the silica gel powder, the mixed proportion of these fibrous materials is preferably 1 weight %-10 weight %, more preferably 2 weight %-5 weight %.
(9) as the animal litter of each record of (1)~(8), wherein aforementioned shot-like particle carries out the material that compression forming obtains for the mixture with silica gel powder and micropowder resin.
In addition, shot-like particle of the present utility model can carry out compression forming and prepares by the mixture with silica gel powder and micropowder resin.At this moment, the micropowder resin plays the effect of the adhesive that will interconnect between the silica gel powder and seal.As the silica gel powder, can similarly use Type B or C type silica gel with the situation of using above-mentioned Ludox, particle diameter is preferably 20 μ m-500 μ m, more preferably 40 μ m-150 μ m.As the micropowder resin, except that acrylic resin, can enumerate polyvinyl resin, acrylic resin, EVA resin (ethylene-vinyl acetate copolymer), ethyl acetate, polyvinyl alcohol resin etc.The average grain diameter of these micropowder resins is preferably 0.1 μ m-500 μ m, more preferably 0.5 μ m-250 μ m, more preferably 0.5 μ m-10 μ m.Particle diameter is more little, can fully extend more when pressurizeing with hand operated press, tablet press machine and briquetting mode, obtains easily and the contact area of micropowder material and bonding with adjacent resin, and the mouldability of grain is good.In addition, the composite rate of micropowder resin is preferably 1 weight %-40 weight % with respect to the silica gel powder, more preferably 2 weight %-10 weight %.
(10) as the animal litter of each record of (1)~(9), wherein the bulk specific gravity of aforementioned shot-like particle is 0.3g/cm
3-1.0g/cm
3
The bulk specific gravity of shot-like particle is preferably 0.3g/cm
3-1.0g/cm
3, 0.6g/cm more preferably
3-0.8g/cm
3If the bulk specific gravity of shot-like particle is excessive, carry the inconvenience of going home after then buying, in addition, the weight of the discarded object after the use can increase.In addition, because shot-like particle itself is excessively closely, so the liquid-absorbent variation.On the other hand, if the bulk specific gravity of shot-like particle is too small, then disperse easily.
(11) as the animal litter of each record of (1)~(10), it is arranged on the imbibition thin slice that absorbs animal body fluid.
Sanitary sand of the present utility model is in having the toilet of special-purpose draining board, mediate and be arranged on the imbibition thin slice that absorbs animal body fluid and when using, can bring into play the effect of good absorbability, deodorization and liquid permeability that it had preferably with draining board.Just, the urine that animal drains sees through the gap of shot-like particle, promptly transfers on the imbibition thin slice, and adhesion, residual urine are absorbed rapidly on the shot-like particle surface.Therefore, stench can be prevented to produce effectively, thereby the cleaning in the toilet can be kept.
(12) a kind of preparation method of animal litter, preparation method as the animal litter that forms by numerous shot-like particles, it comprises following operation: in the silica gel powder, and admixed finepowder end resin or be that the adhesive of main component obtains the mixed processes of its mixture and the molding procedure that aforementioned mixture compression forming is obtained non-spherical shot-like particle with the Ludox.
In the mixed processes that the adhesive that with the silica gel powder with the micropowder resin or with the Ludox is main component mixes, produce fritter in order not make silica gel powder local solidification, need micropowder resin or adhesive to be added to silica gel powder and fully stirring on a small quantity repeatedly.In addition, in order to prevent water evaporates, preferably the mixture storage with silica gel powder and micropowder resin or adhesive exists in the closed container, and places about about 24 hours and carry out slaking.By slaking, micropowder resin or adhesive and silica gel powder are fused fully together, can improve the hardness of sanitary sand.In addition, compression forming is to use pressing block type compacting shape machine or tablet press machine etc., and at 10KN/cm
2~30KN/cm
2About pressure under, the mixture of silica gel powder and micropowder resin or adhesive is shaped to the shape of appointment such as slightly cylindric.
Constitute preferred 1~1000 μ m of particle mean size of the material of above-mentioned shot-like particle, more preferably 20~500 μ m, more preferably 40~150 μ m.When granularity surpassed 1000 μ m, the contact area of adhesives such as aftermentioned resin diminished under the weight relatively waiting, and can not get sufficient adhesion strength.In addition, granularity is less than the little situation of 1 μ m, mobile variation, and production efficiency reduces.Particularly, weight feed is very important when producing with tablet press machine as described later, and mobile poor, shot-like particle that angle of stability is big easily causes arch formation and produces the problem of production efficiency decline.In addition, from mortar 16,16a, take out easily, can add dolomol etc. as lubricant for making pestle 15,15a.Behind the interpolation lubricant, during with the tablet press machine moulding, increased grain, had forming stability that improves grain and the effect that alleviates the burden of machinery from the character that pestle comes off.
(13) between a kind of animal toilet, constitute by animal litter hold-up vessel and imbibition thin slice hold-up vessel, described animal litter hold-up vessel has the bottom of opening of coming in and going out for animal and the liquid trafficability characteristic of laying animal litter, described imbibition thin slice hold-up vessel be positioned at this animal litter hold-up vessel aforementioned bottom the below and the imbibition thin slice is set; Wherein said animal litter is the animal litter of each record of aforementioned (1)~(12).
Constitute by the two-layer structure of the hold-up vessel of storing animal litter between animal toilet of the present utility model with the hold-up vessel of laying the imbibition thin slice.Therefore, be excreted to the liquid that is contained in the excreta on the animal litter, can transfer on the imbibition thin slice from excreta apace.In addition, by with the imbibition slice separates in animal litter hold-up vessel bottom and the imbibition thin slice hold-up vessel, can prevent that the liquid of transferring on the imbibition thin slice from turning back in the animal litter.
The utility model effect
According to the utility model, can obtain being difficult to rolling and the hardness excellence, and the animal litter that can use for a long time.In addition, can obtain excremental absorbing capacity and deodorizing capability excellence to animals such as urines, on the imbibition thin slice that urine is transferred to rapidly be arranged on the sanitary sand bottom, thus the sanitary sand that can prevent stench to produce.
Embodiment
Below, with regard to embodiment of the present utility model, describe with reference to accompanying drawing.
<the a kind of embodiment 〉
[shape]
Fig. 1 represents to constitute the perspective view of shot-like particle 10 of the sanitary sand of the 1st kind of embodiment, and Fig. 2 is illustrated in the profile of the shot-like particle 10 in the X1-X2 direction cutaway view 1.As Fig. 1 and shown in Figure 2, the shot-like particle 10 of sanitary sand that constitutes the 1st kind of embodiment is for slightly cylindric.The maximum outside diameter of this shot-like particle is 10mm, and thickness is 7mm.In addition, the central authorities of end face protrude, and radius of curvature is 10mm.
[preparation method]
The preparation method of shot-like particle 10 who constitutes the sanitary sand of the 1st kind of embodiment comprises mixed processes and molding procedure, and is as follows in more detail.
[mixed processes]
At first, in 50 weight portion Type Bs or C type silica gel powder, mix the short paper pulp of 5 weight portion fibre lengths after, slowly adding 45 weight portions therein is the adhesive of main component with the Ludox, fully stirs to make it can not produce bigger piece.In order not make moisture evaporation, the mixture that obtains after fully stirring is put into container, placed 1 day, thus fused adhesive.
[molding procedure]
Place after 1 day, use hand operated press 101 as shown in Figure 3, exert pressure and it is shaped to slightly cylindric.Specifically, in mortar 16, put into mixture after, exert pressure and carry out compression forming to pestle 15.After the compression forming, take out the moulding product, the moulding product carried out drying from hand operated press 101, up to water content with weight ratio be 10% and below.At last, remove micropowder by sieve and obtain slightly columned shot-like particle 10 with the product of pulverizing.Pressure during compression forming can be according to suitably adjusting from the hardness of the taking-up of forming machine, shot-like particle, drying property etc.If pressure is strong excessively, to the absorbability variation of urine etc., otherwise, if pressure excessively a little less than, then be difficult to keep the shape of shot-like particle.Specifically, be suitable for obtaining the hand operated press of maximum outside diameter as the size of the shot-like particle of 10mm when using to have, just, the internal diameter that uses pestle 15 is during as the hand operated press of 10mm, by applying 10KN/cm
2~30KN/cm
2Pressure, can obtain desired slightly columned shot-like particle.
<the 2 kind of embodiment 〉
[shape]
Fig. 4 represents to constitute the perspective view of shot-like particle 20 of the sanitary sand of the 2nd kind of embodiment, and Fig. 5 is illustrated in the profile of the shot-like particle 20 in the X3-X4 direction cutaway view 4.As shown in Figure 4 and Figure 5, constitute the shot-like particle 20 of sanitary sand of the 2nd kind of embodiment for slightly amygdaloidal.The maximum outside diameter of this shot-like particle 20 is 10mm, and thickness is 7mm.There is not edge part owing to constitute the shot-like particle 20 of the sanitary sand of the 2nd kind of embodiment, so be difficult to wearing and tearing, hardness excellence.
[preparation method]
Preparation method and the 1st kind of embodiment of shot-like particle 20 that constitutes the sanitary sand of the 2nd kind of embodiment similarly comprises mixed processes and molding procedure, and be as follows in more detail.
[mixed processes]
At first, to Type B or C type silica gel powder, with the micropowder resins such as ratio mixing fine powders end acrylic resin of weight ratio 2%~10%.The hardness of the taking-up from forming machine of the mixed proportion of silica gel powder and micropowder resin during according to compression forming, shot-like particle, drying property etc. are suitably adjusted.
[molding procedure]
Use pressing block type compacting shape machine (the pressing block type machine that ホ ソ カ ヮ/PVC one ペ Star Network ス makes) 102 as shown in Figure 6, it is shaped to slightly amygdaloidal.Specifically, mixture 1 is fed in the loading hopper 11, and the screw that is pressed into by vertical molding outgases and prepares compression, simultaneously mixture is supplied between 2 cylinders 13 of rotation, utilize as the groove 14 that is located at the lip-deep article shaped master mold of cylinder 13, it is carried out compression forming.After the compression forming, take out the moulding product, the moulding product are sieved, remove micropowder and obtain slightly amygdaloidal shot-like particle 20 with the product of pulverizing from compacting shape machine.
In addition, do not make like this in the moulding of shot-like particle of type of water, use above-mentioned hand operated press, can prepare slightly columned shot-like particle yet.Specifically, can be prepared as follows: adding in Type B or C type silica gel powder with weight ratio is 10% fine powder acrylic resin, and it is mixed fully, the gained mixture is exerted pressure with hand operated press, thereby carry out compression forming.More particularly, use to have to be suitable for obtaining the hand operated press of maximum outside diameter as the size of the shot-like particle of 10mm, just, the internal diameter that uses pestle 15 is during as the hand operated press of 10mm, by applying 15KN/cm
2Pressure, the shot-like particle that can obtain having desired shape.
<occupation mode 〉
Fig. 7 represents to use between the animal toilet of shot-like particle of the 1st kind of embodiment or the 2nd kind of embodiment, Fig. 8 is the decomposition diagram of expression using method, and Fig. 9 represents to store the fragmentary cross-sectional view between sanitary sand 10 and animal toilet imbibition thin slice 206, shown in Figure 7.
Between animal toilet of the present utility model, as shown in Figure 7, constitute: the case shape sanitary sand hold-up vessel 201 of storing the sanitary sand that forms by numerous shot-like particles by following main element; Be positioned at aforementioned hold-up vessel 201 belows and store the imbibition thin slice hold-up vessel 202 of the imbibition thin slice of can free access ground assembling; And be arranged on aforementioned sanitary sand hold-up vessel 201 tops and cover the side covering 203 of its side.The bottom 204 of aforementioned sanitary sand hold-up vessel 201 has a plurality of emptying apertures 205.This emptying aperture 205 is preferably polyhedron or circle, is preferably the size that sanitary sand 10 is spilt.
As shown in Figure 8, on the upper surface of the bottom 204 of sanitary sand hold-up vessel 201, lay the sanitary sand 10 of specified amount, and be laid to stratiform.In addition, in the hold-up vessel 202 of imbibition thin slice, lay imbibition thin slice 206.
Fig. 9 represents to store the section of the toilet of sanitary sand 10 of the present utility model and imbibition thin slice 206.When animal drained, liquid 207 was at first by between the sanitary sand 10, and again by the emptying aperture 205 on the bottom 204 that is arranged on sanitary sand hold-up vessel 201, the imbibition thin slice 206 that is laid down on then in the imbibition thin slice hold-up vessel 202 absorbs.In addition, remain in the liquid 207 in the aforementioned sanitary sand, be absorbed into gradually along with the time in the aforementioned sanitary sand 10.
Embodiment
At first, by weight percentage, the ratio in C type silica gel micropowder 92.5%, EVA (ethane-acetic acid ethyenyl EVA) resin (average volume particle diameter 4.3 μ m, the Japanese NSC FX2350 of company) 7.0%, dolomol 0.5% stirs material, mix up to obtaining sufficient uniformity.It is the C type silica gel of 25 μ m that C type silica gel uses the size distribution volume average particle size.The particle diameter of C type silica gel micropowder and EVA resin is measured by waving the dress microtrack of Co., Ltd. particle size analyzer HRA (X-100) day.
Then, with tablet press machine (Co., Ltd.
Society of ironworker institute system tablet press machine: model HT-T18) with the said mixture compressing tablet.In addition, tablet press machine uses the tablet press machine of Kikusui Seisakusho Ltd.: model VIRGO 0518SS also can carry out same production.
The mould of tablet press machine uses as shown in figure 10, by the mortar 16a with cylindrical hollow and constituting at pestle 15a, the 17a that this hollow bulb is turned over up and down, the shape of shape is protruded in the central authorities that central authorities that can the columniform both ends of the surface of moulding protrude, columniform diameter is 9mm, the R of central authorities' protuberance is 13mm, the blunt end part of protuberance periphery is 0.1mm, and central protuberance height is 0.77mm.In addition, creating conditions is to supply with mixture 0.26~0.30g/, and it is 20~35KN that pressurization makes pressure.
The result can obtain the shot-like particle 10 of central portion protrusion shape as shown in Figure 1, 2.The maximum outside diameter of this shot-like particle 10 is that 9mm, thickness are that 5.7mm-6.0mm, weight are in 0.26~0.30g scope.
The performance of the shot-like particle that this embodiment obtains is as shown in table 2.
Table 2
|
1 |
2 |
3 |
On average |
Maximum liquid absorption ratio |
72.4% |
71.2% |
70.8% |
71.5% |
Per 3 second the liquid absorption ratio |
43.7% |
44.1% |
45.4% |
44.4% |
Per 3 seconds/maximum liquid absorption ratio |
60.4% |
61.9% |
64.1% |
62.1% |
The liquid transmitance |
72.5% |
74.0% |
73.0% |
73.2% |