JPH10140140A - Method for filling void - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for filling joints or gaps between members or parts of buildings, constructions, apparatuses, machines, tools, etc., by mixing a liq. resin, a foaming agent, and a foam stabilizer under stirring to foam the resin into cream that is far more voluminous than the resin before foaming, then mixing the cream with a particulate substance, and quickly filling the resultant mixture into voids. SOLUTION: A liq. resin is stirred together with a foaming agent and a foam stabilizer to be foamed into cream, then mixed with a particulate substance, and quickly filled into voids. Pref. the particulate substance is expanded resin particles (e.g. expanded polyolefin, polystyrene, or polyurethane particles), their crushing product, or a lightweight aggregate (e.g. pumic stone, pumiceous send, or expanded vermiculite). The liq. resin is a soln. or water-base dispersion of a thermoplastic resin and is the one which can be expanded into cream when mixed under stirring with a surfactant or/and a foam stabilizer and can be cured or dried and cured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to joints and gaps generated between members and parts of buildings, structures and devices and machines, unnecessary spaces for various molded products, and gaps between packaging containers and products. For example, the present invention relates to a method for filling a gap or space by filling a mixture of a granular substance and a creamy substance of a resin.

[0002]

2. Description of the Related Art Conventionally, as a method of filling various joints and voids, a method of using an uncured plastic material in which a filler is mixed with a liquid resin, so-called putty or sealant, filling the gaps and then curing, or a method of pre-curing molding There is known a method in which a string-shaped or tape-shaped material as it is, or a pressure-sensitive adhesive or an adhesive is applied thereto, and the material is pressed into a gap and filled and fixed. Further, when transporting various goods, it is widely used to protect the space between the container and the goods by filling the cushioning material such as styrene foam, which is well known in general. Furthermore, a method of injecting a liquid reaction-curable resin together with a foaming agent and foaming / expanding and reaction-curing in a void is also known. For example, foaming and filling of a urethane resin as a heat insulating layer between an inner wall and an outer wall of a refrigerator is typical. This is a typical example. It is also well known that a product having a complicated shape is put in a box, a urethane resin is injected and foamed, and the product is packed with the product embedded in a foam. In the field of resin molding, there is also a method in which a skin material is mounted on a mold, and a thermoplastic resin mixed with a foaming agent is heated and melt-injected to be integrally formed with the skin. ,

[0003]

However, in these conventional methods using a sealant, a long time is required for curing, so that dripping tends to occur during curing, curing shrinkage occurs, and cured products are generally dense. Heavy
In addition, there is a problem that it is difficult to remove it when it becomes unnecessary. In the method of filling the preformed product, since the shape of the filling is fixed, various types of molded products must be prepared in order to fill the wide and narrow gaps and irregular or irregular voids. In some cases, extra work such as cutting, connecting, or stacking the molded articles is required, and there is a problem that the method is liable to be limited to filling in voids of a specific shape.

In addition, in the method of injecting and foaming a liquid reaction-curable resin, it is difficult to strictly define the injection amount or expansion ratio corresponding to the voids, so that the voids cannot be filled sufficiently or excessively injected. The amount may be out of the frame. When the filling is insufficient, the insufficient portion must be additionally filled, and when the filling is excessive, there is a problem that operations such as removal and removal of the protruding portion are accompanied.
Furthermore, in the injection foam filling method, if the viscosity of the injection liquid is low, the gap at the bottom of the frame is sealed so that the injection liquid does not leak,
In order to avoid underfilling, it is usually injected slightly more than the prescribed amount, so it is necessary to create a vent for foaming pressure and make an excess amount of escape, so that a frame with mixed hands before foaming Preparation work was required. In addition, if it sticks out and sticks to the product, the appearance of the product is disturbed, so that it has to be removed, which requires a lot of trouble.

[0005] There is also a method of filling foam resin pieces or popcorn as a buffer as it is. In this case, even if the entire space is filled, it moves due to vibration or shaking and is always fixed at a necessary place for filling. In other words, it is unevenly moved to a place where the gap is uneven, thereby impairing the filling effect. In addition, there are many disadvantages, for example, it is often difficult to scatter and collect at the time of opening the package when it is no longer needed, for example, in the case of transport packaging. Integral molding by injection of thermoplastic resin requires high-temperature work, a robust and expensive mold that can withstand the injection pressure and an injection machine are required. Product fields and application fields are narrow and limited, such as being limited and requiring labor and cost for production management.

[0006]

[Means for Solving the Problems] The present invention has been made by focusing on such conventional problems. That is,
A liquid resin is mixed with a foaming agent and a foam stabilizer, and the mixture is stirred and foamed, and the resin is expanded to a volume several times that before foaming to form a cream. This is a method of filling voids.

[0007]

The resin used in the present invention includes a foaming agent, that is, a surfactant or / and a foam stabilizer, which can be expanded by mixing and stirring, and can be formed into a cream and cured or dried and cured. Any of these can be used. Such materials include, for example, natural rubber, synthetic rubber various acrylic resins, vinyl acetate resin, isobutylene-maleic anhydride copolymer resin, ethylene-vinyl acetate copolymer resin, polypropylene resin, vinylidene chloride resin, vinyl chloride resin , Chlorinated polyolefin resin, coumarone resin, chloroprene resin, ketone resin, polyamide resin, phenoxy resin, butadiene resin, fluororesin, polyethylene oxide resin, polystyrene resin, polyvinyl alcohol resin, polyvinyl butyral resin, polyvinyl formal resin, polyester resin,
Examples thereof include polycarbonate resin, polyurethane resin, unsaturated polyester resin, melamine resin, urea resin, epoxy resin, resorcinol resin, xylene resin, guanamine resin, phenol resin, furan resin, polyimide resin, and mixtures and modified products thereof. Among these, besides those which are liquid at room temperature, those which can be creamed by moderate heating, for example, 50 ° C. to 150 ° C., and those which can be creamed by solution or emulsification with water or various solvents can be used. Among them, synthetic rubber emulsions, vinyl acetate emulsions, ethylene vinyl acetate emulsions,
Aqueous resins such as polystyrene emulsions and aqueous urethane resins are preferred. In addition, resins which are originally liquid, such as polyurethane resins and unsaturated polyester resins, and those which can be used by diluting them with a small amount of solvent or raising the temperature to appropriately lower the viscosity can be used.

[0008] Examples of the particulate matter include natural or artificial inorganic substances such as minerals, metals, glass, cement, and gypsum, and various natural resins, synthetic resins, plants, fibers, cloths, papers, non-woven fabrics, and the like.
And composites / mixtures thereof, or various crushed wastes / collections. Specifically, soil, gravel, pumice, shirasu, vermiculite, granular alumina, silica, gypsum, zeolite, clay, talc, mica, bentonite, diatomaceous earth, granular charcoal, glass particles, various resin chips,
Foamed resin particles such as polystyrene, foamed resin pieces, hollow resin pieces, sawdust, wood chips, straw chips, rice hulls, foamed cellulose beads, pills, glass wool, felt chips, rubber chips, cardboard chips, leather chips, And mixtures and composites thereof.
Preferably, pumice, shirasu, expanded vermiculite, expanded resin particles, wood chips, popcorn, glass wool, felt chips, rubber chips, cardboard chips, crushed pieces of lightweight waste, and the like are preferable. In particular, expanded vermiculite, expanded polyolefin, expanded polystyrene, ultralight glass beads, expanded polyurethane, expanded cellulose beads, and corrugated cardboard chips are suitable.

The shape of the granular material is not particularly limited, and may be a sphere, a pellet, a tube, a disk, a jagged shape,
Various shapes such as a saddle, scale, or irregular crushed stone can be used, but a spherical shape is preferred from the viewpoint of filling workability. In addition, at the time of filling, if it is desired to reduce the weight by increasing the space between particles, amorphous foamed particles are preferable. The size of the particles is also not particularly limited and can be filled in principle as long as it is equal to or less than the width of the space to be filled, and an appropriate size may be selected depending on the purpose.
It is preferable that the width be equal to or smaller than half of the gap width and equal to or larger than 1/20. If it is expressed in dimensions, it is complicated depending on the shape and can not be said unconditionally,
A diameter of 0.05 mm to 20 mm is preferred.

The foaming agents used for foaming creaming include known anionic surfactants, cationic surfactants, amphoteric surfactants, and fluorine-containing surfactants thereof. . Anionic surfactants are
For example, RCOOM, ROSO ₃ M, C ₈ -C ₁₈ alkyl group, M: alkali metal, N
H ₄ ]. Cationic surfactants include, for example, [Wherein R ′: a C _{8 to} C ₁₈ alkyl group, R ₁ , R ₂ ,
R ₃ : a C ₁ -C ₈ alkyl group, X: a halogen atom]. Amphoteric surfactants include, for example, R ″ NHR ₄ C
OOH [wherein, _{R ":} an alkyl group of C 8 _{-C 18,
R 4: CnH 2n - (n} : 1~8)] , and the like.

Further, the anionic fluorinated surfactant includes:
For _{example, R 'f OC 6 H 4} SO 3 M, R' f OC 6 H
_{4 COOM, R 'f OC 6} H 4 SO 2 N (CH 3) CH
₂ COOM, R _f COOM, R _f SO ₂ N (C ₂ H ₅ )
_{CH 2 COOM, R f CH 2} CH 2 O (C 2 H 5 O) n
SO ₃ M, R _f CH ₂ CH ₂ SCH ₂ CH ₂ CONHC
_{H 2 CH 2 SO 3 M,} R f SO 2 N (C 2 H 5) (C 2
H ₄ O) _n SO ₃ M, R ′ _f OC ₆ H ₄ COO (C ₂ H
_{4 O) n SO 3 M,} R 'f OC 6 H 4 CH 2 OPO
_{3 M, R 'f OC 6} H 4 SO 2 N (R) (CH 2 CH 2
_{O) n SO 3 M, R} f SO 3 M, R f CH 2 CH 2 OS
O ₃ M, R ′ _f OC ₆ H ₄ S, R ′ _f OC ₆ H ₄ CON
(CH ₃ ) CH ₂ COOM, R ′ _f OC ₆ H ₄ CON
(CH ₃ ) CH ₂ CH ₂ SO ₃ M, R _f CH ₂ CH ₂ C
OOM, wherein R'f: C ₆ , C ₈ , C ₉ , C ₁₀ ,
Fluoroalkenyl group C _12, M: 1 monovalent metal, NH
₄ , NH ₃ CH ₂ CH ₂ OH, NH ₂ (CH ₂ CH ₂ O
_{H) 2,} R _f: a fluoroalkyl group having C 6 _{-C 12,
R:} alkyl group of _{C 1 ~C 2, n: 1~10} ] , and the like.

Examples of the cationic fluorine-containing surfactant include R′f (OCH ₂ CH ₂ ) _n N ⁺ (CH ₃ ) ₃ I ⁻ ,
R ′ _f OC ₆ H ₄ CONHCH ₂ CH ₂ CH ₂ N ⁺ (C
H ₃ ) ₃ I ⁻ , R _f CONHCH ₂ CH ₂ N ⁺ (C
H ₃ ) 3 I ⁻ , R _f CH ₂ CH ₂ SCH ₂ COOC ₂ H
^{_{4 N + (CH 3) 3}} I -, R f SO 2 NHCH 2 CH 2
^{_{CH 2 N + (CH 3)}} 3 I -, R 'f OC 6 H 4 SO 2
NHCH ₂ CH ₂ CH ₂ N ⁺ (CH ₃ ) ₃ I ⁻ , R ′ _f
OC ₆ H ₄ CH ₂ N ⁺ (CH ₃ ) ₃ I ⁻ , [R ′ _f : C
₆ , C ₈ , C ₉ , C ₁₀ , C ₁₂ fluoroalkenyl group, R _f : C ₆ -C ₁₂ fluoroalkyl group, n: 1
To 8]. The amphoteric fluorinated surfactant is, for example, R _f CONHCH ₂ CH ₂ CH ₂ N ⁺ (CH ₃ ) ₂ C
H ₂ CH ₂ COO ⁻ , R _f SO ₂ NHCH ₂ CH ₂ CH
^{_{2 N + (CH 3) 2}} CH 2 CH 2 COO -, R 'f OC
^{_{6 H 4 CH 2 N + (}} CH 3) 2 CH 2 COO -, [R '
_f : C ₆ , C ₈ , C ₉ , C ₁₀ , C ₁₂ fluoroalkenyl group, R _f : C ₆ -C ₁₂ fluoroalkyl group]
And so on. The choice of these foaming agents is determined by the type of resin, the type and amount of solvent used in the present invention, and the like.

As the foaming agent, ammonium stearate,
Alkyl phenol-polyethylene glycol sulfate is effective. The addition amount of the foaming agent is optional, but preferably, for example, in the case of a urethane-based resin emulsion, 0.1 to 20 parts by weight, more preferably 1.0 to 10 parts by weight, based on 100 parts by weight of the solid content. is there. The foaming agent is dissolved in an aqueous solution or a mutual solvent such as alcohol, and is added to the resin, resin solution, or resin emulsion used in the present invention. In general, mechanical foaming is preferable. In order to obtain a foamed cream using the resin emulsion composition used in the present invention, for example, a urethane resin emulsion composition is obtained by foaming 1.5 to 5 times by mechanical foaming.

As the cell stabilizer, a thickener suitable for the resin used in the present invention may be added. When an aqueous resin emulsion is used, a thickener having thixotropic properties is suitable. The viscosity of the foamed cream varies depending on the type and shape of the granular material used for filling the voids, but is preferably 5,000 mPaS to 30,000 mPaS. Hereinafter, an aqueous material will be described as an example, but a resin in an organic solvent medium or a solventless resin may be used as long as it can be foamed and creamed, and the present invention is not limited to an aqueous material.

[0015]

Embodiments of the present invention will be described below. First, a granular material having an appropriate size and particle size distribution suitable for the purpose is prepared. Separately, resin as a binder,
For example, a foaming agent is added to an aqueous urethane resin, and the mixture is stirred well. Further, a foam stabilizer prepared in advance is added in advance, and the mixture is stirred at a high speed to form a foam to form a cream. The obtained cream and granules are quickly mixed and stirred, and charged and filled into the voids while the granules are evenly spread with the cream. It is better to carry out filling as quickly as possible without rest. Since the binder forms a thin layer on the surface of the particles or is uniformly dispersed in a point-adhered state at the contact points between the particles, the binder is dried quickly and has a high solidification rate. The preparation of the creamy substance can be performed in batch, but as a continuous operation, it may be creamed using a continuous mechanical foaming machine and supplied continuously,
It is preferred that the filling operation is performed while the cream and the granules are continuously mixed by combining the granules sent through the continuous transfer machine.

[0016]

When the granules are mixed with the foamed resin, the binder can be uniformly applied to the surface of the granules in a small amount without penetrating the porous granules with a small amount of the binder. In other words, the blending ratio between the granular material and the cream-like material is such that even if the cream-like material is small in weight ratio, the volume is swollen many times, so the mixing ratio is not so biased as the volume blending ratio, so that the mixing is even. The feature is that it can be done. That is, since the resin in the cream forms bubbles as the outer wall of the bubbles, the amount thereof is substantially very small with respect to the bubble volume. As a result, there is very little resin in the air bubbles adhering to the surface of the particulate matter, and as a result, the resin can be uniformly dispersed regardless of whether the resin adheres thinly or only in the form of dots. That is, the particles can be effectively bonded together with a substantially small amount of resin. The resin adhering to the particle surface in this way is very thin or dispersed in very small dots, so that drying is fast, and thus the filling solidifies quickly.

In the case where a thermoplastic resin is used as the resin, the resin dispersed in the form of a thin film or fine dots on the surface of particles rapidly evaporates and dissolves the solvent and solidifies only by drying. Bonding points can be formed in a short time. Further, even in a curable resin such as a urethane resin, the solvent becomes thicker and sticky due to the volatilization of the solvent and solidifies to become a resin bonding layer or a bonding point, and the particles are fixed. Hardens with increased strength. By making it creamy, the volume ratio of the resin and the particles is not largely deviated, and the spreadability of the resin is improved, so that the miscibility and dispersibility of both are good. Therefore, even if the amount of the resin is substantially small, uneven distribution hardly occurs, and the resin is uniformly applied. Since the granular material can be solidified with a substantially small amount of resin, solidification can be performed without completely filling gaps between particles, leaving a large space portion, and porous and lightweight filling can be performed.

In a conventional plastic filler, so-called putty or sealing material, a tightly packed compound resin is used, so that there is no space as in the present invention. In contrast, in the present application,
As described above, the void is filled with the foamed binder resin, the compounding material such as paper chips and foamed resin particles, and the space formed therebetween. By increasing the blending volume ratio between the creamy resin and the particles on the resin side, the generation of spaces can be suppressed and a packed layer without liquid permeability can be obtained. The use of the agent, combined with the above-mentioned action of the creamy resin, forms a lighter and more porous filling layer, and is effective as filling of unnecessary space and buffer filling of packing space. The use of a resin solution or an emulsion resin has many advantages such as low viscosity, effective in mixing and dispersion, solidification of the resin only by evaporation of the solvent, and therefore, heating is not necessarily required. Since the operation can be performed at room temperature instead of under heating, a heating device or a large-scale mechanical device is not necessarily required, and therefore, it is easy to perform outdoor on-site work, and the application field is very wide.

Further, when the aqueous resin is creamed by using a surfactant, the surface tension of the resin phase in the cream is reduced, and the particles can be well wetted without repelling on the particle surface. In turn, good wetting will result in a firm bond. When an inorganic substance is used as the particulate matter, the filler can be hardened and made nonflammable. In addition, the use of a lightweight inorganic skeleton such as pumice or expanded vermiculite results in an even lighter and more bulky packed bed, which is perfect for the needs of being light and yet solid. Rubber chips, nonwovens and paper form a packed layer with moderate flexibility and voids, and the use of crushed waste is effective for resource conservation and promotion of recycling. Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited thereto.

[0020]

Example 1 Foaming agent Score Minformer RF (Daiichi Kogyo Seiyaku) 7.5 g in 90 g of forced emulsification type aqueous urethane resin Superflex E-2000 (Daiichi Kogyo Seiyaku).
g, thickener Superflex VF (Daiichi Kogyo Seiyaku)
4.5 g were blended and vigorously stirred with a hand mixer MK-1003 (manufactured by Matsushita Electric Industrial Co., Ltd.) to produce a foamed cream (viscosity: 47,000 mPa.s) having an expansion ratio of 3.0. To this, 700 g of polystyrene expanded beads were added, mixed quickly, and filled and solidified in a cup-shaped container. When it was taken out of the cup 5 minutes after filling, it had already solidified and had sufficient strength as a filling.

[0021]

Example 2 400 g of special polymer emulsion compound DICFOAM F-505EL (manufactured by Dainippon Ink and Chemicals), 80 g of Score Minformer RF, and epoxy cross-linking agent CR-5L (manufactured by Dainippon Ink and Chemicals)
1.2 g, crosslinking accelerator CATALYST PA-20
8 g (manufactured by Dainippon Ink and Chemicals, Inc.) were mixed and mixed vigorously with a hand mixer to form a foamed cream (viscosity: 30,500 mPa.s) having an expansion ratio of 3.5. Add ultralight aggregate G light (made by Sunlight, particle size: 1.2 to 2.
0mm, 0.29-0.42Kg / liter) 2.5K
g was added and mixed quickly, and filled between two FRP plates (1 mx 0.5 mx 2 mm) facing each other at an interval of 2 cm. When the load resistance of this sandwich plate was examined, the bending strength was 71.5 kg / mm ² .

[0022]

Example 3 Self-emulsifying water-based urethane resin Superflex 750 (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) was added to 90 g of a foaming agent, Score Minformer RF, 10 g, and a silicone-based foam stabilizer V.
ONDIC NBA-1 (manufactured by Dainippon Ink and Chemicals) 1
g, a thickening agent Superflex VF, and 7 g, were vigorously stirred with a hand mixer to prepare a foamed cream (viscosity: 4300 mPa.s) having an expansion ratio of 3.5. 500 g of perfume-containing biscopearl AD-3300 (manufactured by Rengo, expanded cellulose beads) and 50 g of the foamed cream were stirred for 5 minutes with a universal mixing stirrer (manufactured by Shinagawa Kogyosho) to obtain 8.5 cm in height and 5.5 cm in width. In a mold having a thickness of 0.5 cm, 35 cm ³ of a fragrance-containing biscopearl whose surface is uniformly coated with a foamed cream-like material is packed.
cm thickness. The biscopearl removed from the mold was an aroma-emitting card-shaped molded product in which the odor was controlled.

[0023]

Example 4 Anion-type aqueous dispersion, Polyester WR
-901 S20WO (manufactured by Nippon Synthetic Chemical Industry) 100 g
And 10 g of Elastron H-38 (Daiichi Kogyo Seiyaku) mixed with 10 g of Score Minformer RF, 5 g of Superflex VF, and 0.5 g of Elastron Catalyst 32 (Daiichi Kogyo Seiyaku). In addition, the mixture was vigorously stirred and foamed with a hand mixer. The obtained creamy product (viscosity of 35,000 cP.s) which was swollen about three times and 200 g of cardboard chips cut into a square of 7 mm were mixed.
It was packed in a liter polybeaker and left at 80 ° C. to cure. After 24 hours, a density of about 0.
4. A packed cylinder with a bulk volume of 700 ml was obtained. This packed layer was an isotropic mass having good air permeability.

[0024]

Example 5 To 100 g of water-based adhesive Polysol OLY-3414 (manufactured by Showa Polymer) for polypropylene, 5 g of Scoremin Former RF was added, and the mixture was vigorously stirred with a hand mixer to obtain a cream-like substance (about 2 times). Viscosity 15
000 cP. s). To this, 30 g of a polypropylene foam chip having an average of about 1 cm ³ was quickly mixed, filled into a 2 liter plastic bucket, and allowed to stand. After 12 hours, the integrated cured product was a mass having a permeability of 0.14 and a density of 0.14. This was an air-permeable mass having a large space between chips, and formed a cushioning layer having a more cushioning property in addition to the elasticity of the polypropylene foam before chipping.

[0025]

Example 6 100 g of aqueous urethane resin W-6015 (manufactured by Takeda Pharmaceutical Co., Ltd.) was added to 10 g of Score Minformer RF.
And Superflex VF (5 g) were added, and the mixture was vigorously stirred with a hand mixer.
000 cP. s). To this, 35 g of urethane foam chips (density 0.009 g / cm ³ ) of about 1 cm square were quickly mixed and filled into a 2 liter poly beaker.
After 12 hours, the foam layer was in close contact with the cup as a cured product having a density of 0.067 and was integrated.

[0026]

Example 7 100 g of a cream-like substance obtained by the same formulation as in Example 1 was mixed with 37 g of a saddle-shaped expanded styrene buffer material used for packing and filling, and filled into a 2 liter polybucket. The cured product integrated after 12 hours had a density of 0.07.

[0027]

Example 8 50 g of a cream-like substance obtained by the same formulation as in Example 1 and 5 g of a closed-cell foamed styrene buffer chip were mixed well, filled in a 200 ml paper cup, and cured. The obtained cured product was a non-liquid-permeable cured product.

[0028]

Example 9 A mixture of a cream and a foamed styrene prepared in the same mixing ratio as in Example 7 was mixed with about 2 m of ABS resin.
The space inside the concave part on the back side of the washstand made with a thickness of m was filled and cured. Before filling, the molded product resonated when hit, and it could easily be twisted and deformed with diagonal corners, but after filling it did not deform easily and clogged from the sound I was able to feel that I was there, and I was able to raise the sense of quality. In this example, it is shown that a filled and molded product having a light weight and sufficient strength can be obtained very economically simply by stuffing it from above and leaving it at room temperature.

[0029]

Example 10 A mixture obtained by the same formulation as in Example 6 except that the amount of the cream was increased by 6 times and the urethane foam was changed to a urethane foam that was clearly closed cells was 3 cm in width, Fill the gap between concrete and concrete with a depth of 6cm and length 1.5m and cure it, paint the concrete surface with paint and stop the flow of concrete from the concrete. And a water leak test from the packed bed was performed. No evidence of water leakage was seen after 24 hours.

[0030]

Example 11 A foaming agent, Score Min Former RF3g, was added to 50 g of a urethane prepolymer having a terminal isocyanate group, Takenate 1-1031 (manufactured by Takeda Pharmaceutical Co., Ltd.).
And 3 g of Superflex VF, and vigorously stirred with a hand mixer to expand the cream about twice (viscosity 430).
0cP. s). 85g of this cream and expanded vermiculite
(About 500 cc in bulk), lightly compacted and allowed to stand. After 24 hours, an integrated cured product having a density of 0.39 was obtained. As a result, a pumice-like molded product having elasticity and air permeability was obtained.

[0031]

According to the invention of the present application, a resin, that is, a binder can be efficiently and evenly dispersed for integrating and fixing the particulate matter, so that the necessary minimum amount can be achieved. This means that the binder layer is distributed thinly or in the form of minute dots, and therefore, the drying becomes very fast, so that the particles can be fixed quickly, the filling operation is speedy, and the next process is performed. Can be moved quickly. Further, since there is no unnecessary uneven distribution even if the amount of the binder is small, there is no occurrence of extra resin seepage, generation of an unfixed portion due to generation of an insufficient place, and shape collapse.

Since the resin is in the form of a cream, even if it is applied to porous air-permeable particles, there is almost no permeation into the inside of the particles due to the effect of surface tension, and the air permeability is not impaired.
Since the particles can be fixed and integrated without substantially impairing the properties and performance of the particles, the inherent performance of the particles becomes a living filler. Before solidification, deformation and fluidity are maintained,
The shape of the void space fits along easily, so there is no shortage of filling. Before solidification, by adjusting the type and amount of binder,
Since the state can be changed from a high fluidity to a plastic state, and furthermore to a state like wet sand, shortage and waste can be suppressed as much as possible by adjusting the amount and fluidity according to the gap. Therefore, there is no problem such as protrusion and sticking to a product as in the conventional injection and foaming of a liquid resin. It can be made into wet sand, filled softly, or tamped tightly, and the filling state can be adjusted according to the situation and purpose.

Although the description has been given here mainly on lightweight fillers, the present invention is not limited to this. For example,
A heavy packed bed can also be intentionally formed by combination with heavy particles such as metal and gravel. Alternatively, the amount of resin may be increased to completely fill the spaces between the particles with the creamy resin to form closed cells, thereby suppressing air permeability and water permeability, that is, sealing and filling.

Continued on the front page (51) Int.Cl. ⁶ Identification code FI C09D 201/00 C09D 201/00

Claims (7)

[Claims] 1. A method of mixing a granular material and a liquid resin, filling the mixture into voids, and solidifying the liquid resin,
A method for filling voids, which is characterized by being made into a cream and mixing. 2. The void according to claim 1, wherein the granular material is a foamed particle of a resin such as polyolefin, polystyrene, or polyurethane, a crushed resin foam, or a lightweight aggregate such as pumice, shirasu, or expanded vermiculite. Filling method. 3. The method according to claim 1, wherein the liquid resin is a thermoplastic resin solution or a dispersion in water. 4. The method according to claim 1, wherein the liquid resin is an aqueous polyurethane. 5. The method according to claim 1, wherein the granular material is impermeable. 6. The method according to claim 1, wherein the granular material is air-permeable. 7. The liquid resin is a thermosetting resin.
The method for filling the voids as described.