JP6175342B2 - Slurry-like coating material and slurry-like coating material preparation apparatus method and apparatus - Google Patents

Description

  The present invention relates to repair / strengthening members for walls, ceilings, floors, rooftops and the like inside and outside buildings, and slurry-like coating materials for repair / strengthening, and the present invention relates to a method and apparatus for preparing such slurry-like coating materials. It is.

  A glass fiber chopped strand is mixed and dispersed as a reinforcing material in a plastic liquid before solidification, for example, an acrylic paint or a urethane paint to form a reinforcing film (Patent Documents 1 and 2, etc.). However, the glass fiber chopped strands were each wound 10 μm, and the number of filaments such as 200 to 1,000 filaments was applied to a glass fiber multifilament and a sizing agent was wound around the roll and pulled out from the roll. It is made by cutting a glass fiber multifilament into a length of 15 mm. Therefore, the glass single fibers constituting one piece of the glass fiber chopped strand are obtained by integrally fixing glass single fibers corresponding to the number of filaments constituting one strand to each other by a sizing agent. Therefore, the contact area between the glass monofilament and the paint cannot be increased, so that the glass monofilament and the paint cannot be sufficiently integrated. Especially in the case of the coating film, the reinforcing layer cannot be so thick, so that sufficient reinforcement can be obtained. In addition, unevenness due to glass fiber chopped strands remains on the surface of the solidified coating film, it does not look good, and in addition, the coating film itself lacks flexibility. Since the followability is lacking, also in this respect, the integrity with respect to the surface to be reinforced, that is, the reinforcing function by the coating film was insufficient. The present applicant has been aware of this problem from an early stage, and in order to deal with this problem, the glass fiber chopped strand is immersed in an organic solvent such as toluene or styrene, thereby removing the sizing agent from the glass fiber chopped strand. The technique which makes it a single fiber and mixes and disperse | distributes this to a coating material is proposed (patent document 3). In addition, it is proposed also about cement slurry to make a glass single fiber by removing a sizing agent from a glass fiber chopped strand, and to use this as a reinforcing material (patent document 4).

JP-A-1-218666 Japanese Patent Laid-Open No. 2004-27221 JP 2001-89265 A JP 52-049236 A

   In the prior art, the sizing agent is removed from the glass fiber chopped strand by immersing the glass fiber chopped strand in an organic solvent (if necessary, stirring) as described in Patent Document 2 or 3. By soaking, the sizing agent is dissolved in an organic solvent, and the sizing agent can be almost completely removed from the glass fiber chopped strand. However, even if the sizing agent is removed from the glass fiber chopped strand by immersion in an organic solvent, the sizing agent is not completely separated into single glass fibers by simply removing the sizing agent by immersion in an organic solvent. The glass monofilaments are partially stuck or entangled with each other, and even have a hairball shape. For this reason, it is mixed with acrylic paint or urethane paint, and the adhesion (film strength) with the glass fiber is still insufficient in the paint film after being applied to a reinforced material such as a deteriorated concrete structure. Since it cannot be said that the single fibers are completely one by one, the flexibility of the coating film is also insufficient, and as a result, it cannot follow the delicate irregularities on the surface of the deteriorated concrete structure, and so on. The desired reinforcement of the object to be reinforced with the glass monofilament-containing coating film could not be performed.

  The present inventor is able to reinforce reinforcement of an object to be reinforced such as deteriorated concrete due to the sticking / entanglement between the glass single fibers partially remaining between the glass single fibers from which the sizing agent is removed from the glass fiber chopped strands by immersion in an organic solvent. As a result of ascertaining the main cause of the failure and earnestly examining it, the glass fiber chopped strands are substantially completely eliminated from the sticking and entanglement between the glass single fibers remaining in the glass single fiber from which the sizing agent has been removed. The present invention has been achieved by successfully opening the fibers one by one.

  According to the present invention, a slurry-like coating material is obtained by forming a glass single fiber by removing the spinning sizing agent with a solvent from the glass fiber chopped strand, and dispersing the glass single fiber from which the spinning sizing agent is removed in a liquid coating material. The glass single fiber from which the spinning sizing agent has been removed has undergone fiber opening to eliminate the partially stuck or entangled state remaining between the glass single fibers prior to mixing and dispersion with the liquid coating material. A slurry-like coating material is provided.

  The unfolded glass single fiber is made by engaging a bundle of glass single fibers scraped by a low-speed rotating protrusion from a glass single-fiber lump from which the spinning and sizing agent has been removed, into engagement with a high-speed rotating protrusion. It can be obtained.

  The thickness of each single glass fiber is 3 to 30 μm, the cutting length can be 3 to 20 mm, and the liquid coating material is mixed with a flame retardant such as a halogen compound to make it fire and flame retardant. Can do.

  The slurry-like coating material of the present invention is prepared by removing the spinning sizing agent with a solvent from the glass fiber chopped strands, collecting the single glass fibers from which the spinning sizing agent has been removed, and collecting them in a lump. The glass monofilament bundle is scraped off by rotating axial and circumferential projection rows, and the scraped glass monofilament bundle is substantially engaged by engaging the axial and circumferential projection rows rotating at high speed. By obtaining a high-speed flow of single glass fibers opened one by one and directing the high-speed flow of glass single fibers toward the surface of the liquid coating material being stirred, the liquid coating material is trapped on the surface. At the same time, it is mixed and dispersed in a liquid coating material.

  The stirring of the liquid coating material can be performed so as to generate a stirring flow of the liquid coating material in the vertical direction in order to improve the dispersion of the single glass fiber in the liquid coating material. The weight ratio of the fibers is preferably 0.5% to 10%. Further, the liquid coating material preferably has a viscosity of 20,000 mPa · s to 80,000 mPa · s so as to capture the opened glass fiber from the opening device. In preparation of the liquid coating material, a flame retardant such as a halogen compound can be mixed to provide fire prevention and flame resistance.

  An apparatus for preparing a slurry-like paint according to the present invention comprises a liquid coating tank containing a liquid coating material, a fiber lump supply tube, a fiber opening means, and a stirring means for stirring the liquid coating material in the liquid coating tank. The fiber opening means is formed by forming axially and circumferentially protruding portions rotating at low speeds on the outer surface thereof, and scraping the fiber bundle from the lower end of the supply tube. A fiber bundle engaging member that engages with a fiber bundle scraped by the fiber bundle scraping member, formed by forming axially and circumferentially protruding portions that rotate at high speed on the outer surface thereof in a row. Consists of. The fiber bundle scraping member and the fiber bundle engaging member can be arranged such that the protrusion rows alternately enter along the axial direction.

  According to this invention, the glass single fiber mixed and dispersed in the liquid coating material is a portion between the glass single fibers remaining in the glass single fiber lump (aggregate) in which the spinning sizing agent is removed from the glass fiber chopped strands with a solvent. This is a result of removing the adhesive or confounding by the opening action applied afterwards. Therefore, the glass single fiber is mixed with a liquid coating material such as polyurethane paint in a state where the glass single fibers are substantially completely separated one by one. Therefore, the maximum contact area between individual glass single fibers and liquid coating material can be obtained, and the maximum unity with the glass single fibers when solidified as a coating film can be obtained. The flexibility of the coating film is not impaired while obtaining the expected increase in strength. Therefore, the coating film can be brought into close contact with the surface of the reinforced object following the unevenness of the surface of the reinforced object such as deteriorated concrete, and the maximum reinforcing effect can be obtained by the coating film.

  Opening of a glass single fiber lump (aggregate) from which the spinning sizing agent has been removed from the glass fiber chopped strands with a solvent is caused by a protrusion that rotates at a low speed from the aggregate (globular body) of glass single fibers from which the spinning sizing agent has been removed. The glass monofilaments are scraped into bundles, and the scraped glass monofilament fiber bundles are engaged with protrusions that rotate at a high speed, thereby opening the glass monofilament bundles one by one. it can.

  In the preparation of the slurry-like coating material of the present invention, the spinning sizing agent is removed with a solvent from the glass fiber chopped strands, and the glass single fibers from which the spinning sizing agent has been removed are collected in a lump, and from the single fiber lump mass, The glass single fiber bundle is scraped off by the axial and circumferential projection rows rotating at low speed, and the scraped glass single fiber bundle is engaged with the axial and circumferential projection rows rotating at high speed at high speed. As a result, a high-speed flow of the single glass fibers opened substantially one by one is obtained, and the high-speed flow of the single glass fibers is directed to the surface of the liquid coating material being stirred. The fibrillated glass fiber can be trapped on the surface of the liquid coating material, and can be efficiently and uniformly dispersed in the liquid coating material by stirring to prepare a slurry-like coating material. is there.

  Further, a fiber bundle scraping member that scrapes off the fiber bundle from the lower end of the supply tube, formed by forming axially and circumferentially protruding portions in a row shape on the outer surface of the fiber opening device at low speed, It comprises a fiber bundle engaging member that is formed by forming axially and circumferentially protruding portions that rotate at high speed on the outer surface thereof in a row, and that engages with the fiber bundle scraped by the fiber bundle scraping member. Accordingly, the glass single fibers are scraped into a bundle from the glass single fiber lump after the spinning and sizing agent is removed by the axial and circumferential protrusions of the fiber bundle scraping member rotating at a low speed. By engaging the fiber bundles with axially and circumferentially protruding rows that rotate at high speed, the glass single fibers are surely separated one by one into a glass single fiber flow directed and captured by the liquid coating material. Can be formed.

FIG. 1 is a side view showing, in partial cross section, the outline of the slurry-like coating material manufacturing apparatus of the present invention. FIG. 2 is a schematic plan view of the slurry coating material manufacturing apparatus of the present invention. FIG. 3 is a perspective view schematically showing a glass single fiber lump supply and fiber opening mechanism section from the supply tube to the fiber opening device of the present invention. FIG. 4 is a cross-sectional view schematically showing a part from the lower part of the supply tube of the present invention to the fiber opening device. FIG. 5 is a plan view of first and second rotating bodies constituting the fiber-spreading apparatus in FIG. FIG. 6 is an enlarged view of the cooperating portion of the first and second rotating bodies in FIG. 4, and is an extremely schematic explanation of the opening operation in the present invention. FIG. 7 is a cross-sectional view of a cartridge-type glass single fiber lump supply device. FIG. 8 is a plan view of a cartridge-type glass single fiber lump supply device.

  The present invention is particularly related to the above-mentioned Patent Document 3 related to the same applicant. In the technique of Patent Document 3, a material obtained by removing a spinning sizing agent from a glass fiber chopped strand with a solvent is dispersed and mixed in a liquid coating material to obtain a slurry-like coating material for repairing the surface of a building. Although the chopped strand is cut to a length of 3 mm to 20 mm, the sizing agent applied just below the spinning nozzle remains during the spinning process of the glass fiber filament, so one piece of chopped strand is a rigid rod The state is exhibited. If it remains in the form of a rigid rod, the surface of the coating will not be smooth, and this is not suitable for forming a thin reinforcing coating on the surface of the object to be repaired on the surface of the building. The sizing agent was removed by treatment, and this was mixed and dispersed with a paint to form a slurry-like coating material. By removing the sizing agent, the rigidity of the chopped strand is considerably weakened, but the partial sticking / entanglement between the glass single fibers remains, and the single glass single fibers are completely separated from each other. However, as a result of intensive studies by the inventor for more ideal building repairs, partial sticking / entanglement between glass fibers from which the sizing agent has been removed is virtually completely removed, one by one. Elucidation of what is necessary to achieve an ideal reinforcing effect with a coating film obtained by applying a slurry-like coating material in which a single glass fiber is dispersed, mixed with a liquid coating material Thus, the present invention has been achieved.

  As the liquid coating material in the present invention, acrylic or urethane-based paints are preferable. These paints exhibit viscous properties, and the viscosity is optimally around 50,000 mPa · s, and a preferable range is 20,000 mPas.・ S ～ 80,000mPa ・ s. In the present invention, the glass single fibers after removal of the sizing agent are opened so as to be substantially completely one by one, the flow of the opened glass single fibers is directed to the surface of the liquid paint being stirred, A glass single fiber is adhered and trapped on the surface of the paint due to its adhesiveness, and the glass single fiber is mixed and dispersed in the paint by stirring the paint to obtain a slurry coating material.

  1 to 3 schematically show an entire apparatus for carrying out the method for preparing a slurry-like coating material according to the present invention. Reference numeral 10 denotes a liquid coating material containing a liquid coating material such as an acrylic paint or a urethane paint. The material tank, 11 is a sensor for monitoring the liquid surface of the liquid coating material, 12 is a stirring means for the liquid coating material in the liquid coating material tank 10, 13 is a support, and 14 is a post-bundling agent removal treatment used in the fiber opening process. A glass single fiber lump intermediate supply cylinder, 15 a glass single fiber opening device, and 16 a glass single fiber lump pressing cylinder. A rotating cartridge type fiber lump supply device 17 is disposed above the glass single fiber lump supply cylinder 14. The configuration of the rotary cartridge type fiber lump supply device 17 will be described later.

  The stirring means 12 stirs a liquid coating material such as an acrylic paint or a urethane paint housed in the liquid coating tank 10 and includes a rotating shaft 12-1 and a rotating blade 12-2. -1 is belt-coupled to a rotary drive motor (not shown). The rotary blade 12-2 is shown as an axial flow screw type with two blades, and the bottom of the liquid coating material accommodated in the liquid coating tank 10 as shown by the arrow in the liquid coating tank 10 of FIG. From the center upward, from the coating material surface to the outer periphery, toward the bottom at the outer periphery, it constitutes a circulation flow of the coating material in the longitudinal direction and radial direction (of course also in the circumferential direction) circulating to the rotary blade 12-2, as described later In addition, the glass single fiber adhered by the viscosity by being sprayed on the surface of the coating material is uniformly mixed and dispersed with the liquid coating material, and the glass single fiber is uniformly dispersed in the liquid coating material to obtain a slurry-like coating material. be able to. Instead of two blades, a three-blade axial screw may be used, and anchor wings and ribbon wings may also be used as suitable for viscous liquid coating materials such as acrylic paints and urethane paints. it can. The rotational speed of the rotary blade 12-2 is about 300 to 1,400 revolutions / minute, but the slurry is reduced to 150 revolutions / minute on the outer periphery when the central axis is 1,000 revolutions / minute.

  FIG. 4 shows a glass fiber chopped strand filled in a supply cylinder 14, dipped in a solvent to remove the spinning sizing agent, dried, and dried into a glass single fiber lump with a fiber opening device 15, and the surface of the liquid coating material The structure of the present invention for adhering to is schematically shown. In this embodiment, the glass fiber chopped strand is obtained by cutting a glass fiber multifilament having a filament number of 200 and a single filament diameter of 10 μm into a length of 13 mm. The multifilament from the spinning nozzle is given a sizing agent just below the spinning nozzle, so that the individual glass single fibers constituting one piece of chopped strand are glued together, and the chopped strand has no flexibility at all. It is of the nature. In order to make individual glass single fibers from the chopped strands, the chopped strands are immersed in a solvent such as toluene as described in Patent Document 3. Then, the sizing agent component is dissolved in the solvent from the chopped strand, and the sizing agent can be substantially completely removed from the chopped strand. Even in this state, the flexibility of individual glass single fibers having a single filament diameter of 10 μm is manifested. As disclosed in Patent Document 3, it is dispersed in a urethane-based paint and made into a slurry, so that it can be applied to uneven surfaces such as concrete. In this case, it is possible to construct a glass fiber reinforced film that follows the uneven surface. However, only by immersing the chopped strands in the solvent, the partial agglutination / entanglement between the single glass fibers always remains, and the partial agglutination / entanglement between the single glass fibers exhibits a hairball shape in an extreme case. However, the single glass fibers from which the spinning sizing agent has been removed are not completely separated from each other. In the present invention, with the configuration of FIG. 4, the glass single fibers after removal of the solvent from the chopped strands are opened so as to be substantially one by one, and the opened glass single fibers are put into the paint. It is intended to prepare a more ideal slurry state by uniformly dispersing.

  The fiber opening according to the present invention and the method for supplying the opened glass monofilament to the coating surface will be described in more detail. In FIG. 4, in the supply cylinder 14, the glass fiber chopped strand is immersed in a solvent to dissolve the sizing agent. The glass monofilament after that is accommodated. The glass single fiber is in the form of a lump (the glass single fiber lump is represented by G) and is filled in the supply cylinder 14. The glass single fiber lump in the supply cylinder 14 is filled in about 4 liters with a weight of 0.6 kg to 0.8 kg. Further, for continuous supply of the glass monofilament lump, a pressing cylinder 16 (FIG. 3) is installed on the upper end side of the supply tube 14 as a pressurizing device for supplying glass monofilament lump such as a piston described later. The fiber opening device 15 of FIG. 4 is installed below the supply cylinder 14 and is positioned obliquely below the first rotating body 18 (fiber bundle scraping member of the present invention) located on the upper side and the first rotating body 18. And a second rotating body 20 (fiber bundle engaging member of the present invention). As shown in FIG. 5, the first rotating body 18 has a number of discs 18-2 on a rotating shaft 18-1, which are not shown in the drawing and are not shown in FIG. A key groove 18-2A provided is shown), a spacer 18-3 is inserted between adjacent disks 18-2, and a predetermined gap 18-4 is provided between adjacent disks 18-2. To be left behind. The alternating arrangement of the disk 18-2 and the spacer 18-3 on the rotating shaft 18-1 is fastened by screw-type fasteners 18-6 and 18-8 from both ends, so that the first rotating body 18 is obtained. Assembled. As shown in FIG. 4, the individual disks 18-2 are provided with protrusions 18-2B at equal intervals in the circumferential direction on the outer periphery, and the protrusions 18-2B are front surfaces 18-2B ′ in the rotation direction (arrow a). Is smoothly curved and extends to the tip 18-2C. Since the first rotating body 18 has a large number of discs 18-2 spaced apart on the rotating shaft 18-1 in the axial direction, the protrusion 18-2B is spaced not only in the circumferential direction but also in the axial direction. In other words, the first rotating body 18 includes a row of circumferentially and axially protruding portions 18-2B on the outer peripheral surface thereof. Here, the rotation direction a of the first rotating body 18 is the clockwise direction of FIG. 4 and functionally, the glass single fibers are scraped in a bundle form from the glass single fiber lump of the supply tube 14 as described later. This is the direction in which the single glass fiber bundle is transferred toward the second rotating body 20 in the supply cylinder 14.

  The structure of the second rotating body 20 is basically the same as that of the first rotating body 18, and as shown in FIG. 5, a large number of disks 20-2 are placed on the rotating shaft 20-1 as keys (key grooves are shown in FIG. 4). 20-2A), a spacer 20-3 is inserted between adjacent disks 20-2, and a predetermined gap 20-4 is inserted between adjacent disks 20-2. Is configured to be left. As shown in FIG. 4, the individual disks 20-2 are provided with protrusions 20-2B on the outer periphery at equal intervals in the circumferential direction. The protrusion 20-2B on the disk 20-2 of the second rotating body 20 is different in shape from the protrusion 18-2b of the disk 18-2 of the first rotating body 18, and the front and rear surfaces in the rotational direction are almost symmetrical. However, a recess 20-2D is formed slightly on the inner diameter side of the tip 20-2C of the protrusion 20-2B on the front surface in the rotation direction (arrow b). Here, the rotation direction b of the second rotating body 20 is the counterclockwise direction of FIG. 4 (the direction opposite to the rotating direction a of the first rotating body 18), and the glass single fiber bundle carried by the first rotating body 18. In the direction in which the opened glass single fiber is sprayed onto the coating liquid surface under centrifugal force. Similar to the first rotator 18, the second rotator 20 has a large number of discs 20-2 on the rotating shaft 20-1 spaced apart in the axial direction. In addition to being arranged in the axial direction as well, in other words, the second rotating body 20 as well as the first rotating body 18 has a row of circumferentially and axially protruding portions 20-2B on its outer peripheral surface. To prepare. As shown in FIG. 4, the second rotating body 20 is disposed obliquely below in the vicinity of the first rotating body 18. Then, as shown in FIG. 5, the protrusion 20-2B of the disk 20-2 of the second rotating body 20 extends into the gap 18-4 between the adjacent disks 18-2 of the first rotating body 18, and reversely Further, the protrusion 18-2B of the disk 18-2 of the first rotating body 18 extends into the gap 20-4 between the adjacent disks 20-2 of the second rotating body 20, in other words, the first rotation. The disk 18-2 of the body 18 and the disk 20-2 of the second rotating body 20 are positioned so that the protrusions 18-2B and 20-2B protrude alternately toward the other side along the axial direction. As shown in the enlarged view of part A in FIG. 5, a gap (axial gap) δ is left between the opposing surfaces of the disks 18-1 and 20-1 between the first rotating body 18 and the second rotating body 20, and this axis The size of the direction gap δ is 0.03 to 0.06 mm, and as described in the opening operation described later, the glass single fiber passes through the axial direction gap δ at the time of opening, and the first rotating body 18. The single glass fiber is strongly opened in the axial gap δ due to a large speed difference between the second rotating body 20 and the second rotating body 20, and the glass single fiber is released from sticking and entanglement, and the single glass fiber is opened to one by one. Is done. On the other hand, between the tip 18-2C of the protrusion 18-2B of the first rotating body 18 and the opposing surface (spacer 20-3) of the second rotating body 20 and the tip of the protrusion 20-2B of the second rotating body 20. The space between 18-2C and the opposing surface of the first rotating body 18 (spacer 18-3) is non-contact because of the mutual rotation of the first and second rotating bodies 18 and 20, and the gap is uniformly set to about 0.5 mm. Is done.

  FIG. 3 schematically shows the driving portions of the first rotating body 18 and the second rotating body 20, and the driven pulley 22 is driven by a belt 23 by a belt 23 at the end of the rotating shaft 18-1 of the first rotating body 18. 24 is connected to a driving pulley 25 on the upper side. The rotary drive shaft 24 is connected to a first rotary body drive motor of a rotational speed controllable type such as an inverter type not shown. On the other hand, the rotating shaft 20-1 of the second rotating body 20 is also connected to a second rotating body drive motor (installed in the box 26) that can control the rotational speed, such as an inverter type, not shown. By the independent driving of the first and second rotating bodies 18 and 20, the desired rotational speed difference between the rotating bodies 18 and 20 (the rotational speed of the first rotating body 18 << the rotational speed of the second rotating body 20) is obtained as appropriate. To be done. The rotational speed difference between the first rotating body 18 and the second rotating body 20 is, for example, such that when the first rotating body 18 is 50 to 130 revolutions / minute, the second rotating body 20 is 1,500 to 3,000 revolutions / minute. The speed ratio is about 20-30. The rotational speeds of the first rotating body 18 and the second rotating body 20 need to be finely adjusted for the desired opening, and such an independent drive configuration is suitable.

  Next, the fiber opening operation by the fiber opening device 15 will be described. The glass monofilaments are packed into the supply cylinder 14 in a lump shape. The first rotating body 18 rotates in the direction of arrow a in FIG. 4, and this rotating direction a acts on the lower surface of the fiber mass G filled in the supply cylinder 14 to scrape the fiber bundle from the lower surface of the fiber mass G and scrape it. In this direction, the taken fiber bundle is supplied toward the second rotating body 20 at the bottom of the supply cylinder 14 (without spilling out from the supply cylinder 14). That is, the rotation direction front surface 18-2B 'of the protrusion 18-2B of the disk 18-2 constituting the first rotating body 18 is curved in the direction opposite to the rotation direction. When engaged with the mass G, the glass single fibers are scraped into a bundle shape, and the glass single fiber bundle is rotated by the rotation in the arrow direction a along the bottom surface of the supply tube 14 while being engaged with the protrusion 18-2B. It is transferred in the direction of the body 20. As described with reference to FIG. 5, the first rotating body 18 and the second rotating body 20 are in a positional relationship in which the protrusions 18-2B and 20-2B of the wheels 18-2 and 20-2 enter each other. The glass fiber bundle scraped by engaging with the protrusion 18-2B of the wheel 18-2 of the first rotating body 18 is a gap 18 between the adjacent wheels 18-2 of the first rotating body 18. -4 engages with the protrusion 20-2B of the second rotating body 20 that rotates (in the direction of arrow b). Because of the large speed difference between the protrusion 18-2B and the protrusion 20-2B due to the high speed of the second rotor relative to the first rotor 18, the fiber bundle held by the protrusion 18-2B of the first rotor 18 is not a gap. Due to the strong opening action due to the engagement with the protrusion 20-2B of the second rotating body 20 that successively enters the part 20-4, the sticking / entanglement between the glass single fibers in the fiber bundle is released, The single glass fibers are opened one by one, and the opened glass single fibers are ejected in the direction of a large tangential line as indicated by arrow F while being scattered by the centrifugal force of the second rotating body 20 rotating at high speed. It is directed to the coating material surface P of the material. By being sprayed on the surface of the coating material, it is stuck by its viscosity. Since the liquid coating material is agitated by the stirring blade 12-2 as described above, the glass single fiber adhered to the surface of the coating material is uniformly mixed and dispersed with the liquid coating material, and the glass single fiber is liquidized. It can be dispersed uniformly in the coating material to form a slurry-like coating material.

  The coating liquid level P in the liquid coating material tank 10 cannot be contacted with the opening device 15, but if it is too far away, the speed of the opened glass single fiber flow F from the opening device 15 decreases, It is unfavorable and needs to be maintained at the optimum liquid level. Therefore, a sensor 11 for monitoring the paint liquid level P is installed (see FIG. 1).

  FIG. 6 is an extremely schematic view showing the above-described opening action by the opening apparatus 15 so as to make it easier to understand. From the glass single fiber lump after dissolution and removal of the sizing agent, the protrusion of the first rotating body 18 is shown. A fiber bundle that has been scraped and held by 18-2B and is carried at a low speed a to the site of association with the second rotating body 20 is indicated by f. Even if the sizing agent is dissolved and removed, partial sticking or entanglement remains in the fiber bundle f, and it is not completely separated into one. The protruding portion 20-2B of the second rotating body 20 enters the narrow gap 18-4 (FIG. 5) between the protruding portions 18-2B at high speed b (the protruding portion 18-2B of the first rotating body 18 is the protruding portion 20). -2B), the protrusion 20-2B rotating at a high speed with the fiber bundle f held by the protrusion 18-2B, especially the recess 20-2D on the front in the direction of rotation The fiber bundles f held by one protrusion 18-2B due to the overwhelming speed difference of the protrusion 20-2B with respect to the protrusion 18-2B are engaged with the protrusion 20-2B rotating one after another. Thus, the next to the next engagement of the protrusion 20-2B with the fiber bundle f held by one protrusion 18-2B generated in the gap between the protrusions 18-2B and 20-2B is the opposite surface. Since the gap δ between them is narrow, it becomes a strong fiber opening action on the fiber bundle f held by one protrusion 18-2B, and finally the glass single fiber completely separated into one by one f ′ and when leaving the projection 20-2B Then, the flow F of the fully opened glass monofilament directed toward the liquid coating material surface P while being scattered by the centrifugal force of the second rotating body 20.

  Since the protrusions 18-2B in the first rotating body 18 and the protrusions 20-2B in the second rotating body 20 are configured as circumferential and axial rows, the fiber bundles from the supply cylinder 14 are opened throughout. The opening action by the device 15 can be applied. That is, as shown in FIG. 3, the upper end of the supply cylinder 14 has a circular cross section, but the lower end has a rectangular cross section. The body 18 and the second rotating body 20 achieve the fiber lump scraping function and the fiber opening function. The axial lengths of the installed portions of the disks 18-2 and 20-2 are the same as those of the supply cylinder 14 along the axial direction of the fiber opening device. It is based on the width. As shown in FIG. 4, the supply cylinder 14 has a side surface 14-1 on the second rotating body 20 side bent to the first rotating body 18 side, and the meeting portion between the first rotating body 18 and the second rotating body 20 is A narrow throat portion 21 is formed, and the second rotating body 20 is positioned below the throat portion 21. Therefore, after the glass single fiber lump in the supply cylinder 14 is scraped by the first rotating body 18, it is efficiently delivered to the second rotating body 20 to be opened and directed to the paint surface. A high-speed flow F (FIGS. 4 and 6) of the glass single fiber to be opened is formed.

  Depending on the rotational speed difference between the first rotating body 18 and the second rotating body 20, the processing speed depends on the rotating speed of the first rotating body 18, and the fiber opening efficiency is the second rotating body 20 with respect to the first rotating body 18. Depends on the speed ratio. However, since an excessive speed ratio is concerned about excessive damage to the fiber, it is necessary to appropriately determine the desired processing speed and fiber opening. When the density of single glass fiber mass (fiber mass weight / volume) in the supply cylinder 14 is 0.2, the speed of the first rotating body 18 is about 100 rev / min, and the speed of the second rotating body 20 is about 2,500 rev. It was generally appropriate to use / min.

  As described above, the glass single fiber opened by the fiber opening device 15 one by one under the centrifugal force due to the high-speed rotation of the second rotating body 20 as shown by the arrow F in FIGS. Be blown into. Since the viscosity of the paint is about 50,000 mPa · s, it is trapped under the viscosity of the coating liquid surface, and the paint is longitudinally and rotated by the stirring blade 12-2 as shown in Fig. 1. Since the directional stirring is applied, the glass single fiber can be uniformly dispersed in the coating material to form a slurry-like coating material.

Next, the glass single fiber introduction device for the supply cylinder 14 will be described. Although it is the weight ratio of the glass single fiber in the slurry-like coating material, the larger the weight ratio is, the better from the viewpoint of reinforcement, From the viewpoint of the paintability (efficiency of painting work) to repaired structures such as deteriorated concrete, a very large weight ratio will impair this, and 0.5 to 10% is reasonable, while the liquid coating material tank 10 Is about the size of a normal drum (200 liters) and can hold about 150 kg of paint. Therefore, the single glass fiber to be supplied and mixed in the liquid coating material tank 10 in one batch is 1.5 kg to 15 kg. However, the glass single fiber lump after removal of the sizing agent has a fluffy and bulky property, and even if compressed considerably, it only weighs about 200 g per liter, and should be supplied to the liquid coating material tank 10. The volume of the glass single fiber lump becomes 7.5 to 75 liters, and an efficient introduction method of the light but fluffy and bulky glass single fiber lump is required. The rotating cartridge type fiber lump supply device 17 can achieve this requirement. The configuration of the rotating cartridge type fiber lump supply device 17 will be described below. 100mmφ, 50cm in length and approximately 4 liters in volume), the glass single fiber lump after removing the sizing agent filled therein is continuously fed to the required supply cylinder 14, and the fiber lump supply device 17 itself moves up and down. The rotary motor 32 can be moved up and down in FIG. The lifting rotary motor 32 is provided on the lifting platform 34, and the lifting platform 34 is connected to the machine frame assembly 35 of the fiber lump supply device 17, but between the lifting platform 34 and the guide rod 33 (attached to the column 13). Is provided with a longitudinal sliding portion (not shown) composed of a longitudinal groove and a longitudinal projection, and a gear (not shown) connected to the rotating shaft of the motor 32 is provided on the lifting platform 34. A rotary motion / vertical motion conversion means such as engaging with a rack (not shown) is provided, and the fiber lump supply device 17 can be appropriately moved up and down along the support column 13 by the rotation of the motor 32. Yes. As shown in FIGS. 7 and 8, the machine frame assembly 35 of the fiber lump supply device 17 connects the upper and lower disk-shaped frames 36 and 37 with eight connecting rods 38 arranged at equal intervals in the circumferential direction. It presents a cocoon-shaped structure. Cartridge holding discs 40 and 42 are fixed to the inner surface sides of the upper and lower disc-shaped frames 36 and 37, respectively. The cartridge holder 44 is for holding the four cartridges 30 in a revolver type. The cartridge holder 44 is provided so as to be in sliding contact with the upper and lower cartridge holding discs 40.42 (fixed side) on the inner side of the machine frame under its rotation, and has a semi-moon shaped cartridge receiving groove 45 at four positions every 90 degrees on the outer periphery. The formed cartridge receiving plates 46, 48 and the upper and lower cartridge receiving plates 46, 48 are connected to each other, four rods 49 configured in a rotating bowl shape, and a machine frame assembly 35 (upper and lower disk-shaped frames 36, 37). The rotary shaft 50 is rotatable with respect to the rotary shaft 50, the upper and lower ball bearings 51 and 52 for the rotary shaft 50, and the upper and lower cartridge receiving plates 46 and 48 are spaced apart from each other in the circumferential direction. Four arcuate cartridge pressing members 53, 54 provided along the inner circumference of the cartridge, four pins 56 for rotating the four pairs of upper and lower cartridge pressing members 53, 54, and the cartridge pressing members 53, 54 The upper and lower pairs of 54 are centered on the pin 56 in the figure. From a spring 58 that urges rotation in a clockwise direction and a cartridge holder drive motor 60 that is connected to the upper end of the rotary shaft 50 via a connecting means such as a universal joint and that rotates the rotary shaft 50, that is, the cartridge holder 44. Composed. Above and below the cartridge holding disc 40.42 is the concentric and semicircular cartridge receiving groove 45, an inner diameter of the glass filaments mass feed station S _B of small circular apertures 64 (described later than the outer diameter of the cartridge 30 The cartridge 30 is held and engaged with the lower cartridge support disk 42 without falling, and the glass lump pressing cylinder 16 from each cartridge 30 at the glass single fiber lump supply station S _B A single fiber mass can be supplied to the supply tube 14. Further, in the later empty cartridge discharge station S _C, air cartridge stopper 66 up and down the inner surface side of the cartridge holding the disc 40.42 is fixed, the thickness of the empty cartridge stopper 66 antagonizes that of the cartridge holding a disc 40.42 In addition, an arcuate plate shape is formed in sliding contact with the cartridge holding disc 40.42 on the inner peripheral side so as not to hinder the rotation of the cartridge holding disc 40.42. Empty edge 66A of the cartridge stopper 66 is extended position in the tangential direction of the rotation direction downstream side of the crescent-shaped cartridge receiving groove 45 of the cartridge receiving plate 46, 48 in the later discharge station S _C, air cartridge in the discharge station S _C The stopper function can be fulfilled.

Cartridge holder 44 is rotated by the motor 60, and a cartridge feed station S _A, a single glass fiber mass after the sizing agent is removed and the glass filaments mass feed station S _B supplied to the supply cylinder 14 from the cartridge 30, it can be stopped at the discharge station S _C cartridge emptied.

The operation of the rotating cartridge type fiber lump supply device 17 will be described. Glass single fibers in which glass fiber chopped strands are dipped and the spinning sizing agent is dissolved and removed are filled in the cartridge 30 at a predetermined density of 0.2. Necessary number of cartridges 30 are prepared. Cartridge 30 through the feed chute 70, is transported by the cartridge feed station _{S A} to the cartridge holder 44. That is, the cartridge is pushed until it abuts against the one cartridge receiving groove 45 of the cartridge retaining disc 40.42 is stopped at the cartridge feed station S _A (arrow h). At this time, the cartridge pressing members 53 and 54 are lightly pressed against the outer periphery of the cartridge 30 on the inner surface (concave surface) by the spring 58, and the cartridge 30 is held. The upper and lower sides of the cartridge 30 are regulated by a cartridge holding disk 40.42.

The cartridge holder 44 is rotated by the rotation of the motor 60, and the cartridge 30 is moved in the circumferential direction (arrow g) while being slidably regulated by the cartridge holding disk 40.42, and the glass single fiber lump supply station S _B The cartridge holder 44 stops. While the stop position aligned cartridge 30 and circular opening 64 of the upper and lower cartridge holding disc 40.42, the cartridge 30 less than the outer diameter of the inner diameter cartridge 30 of the circular opening 64 is held to the glass filaments mass feed station S _B Is done. When the air pressure is introduced into the pressing cylinder 16, the piston rod 16-1 is extended, and the piston 16-2 at the tip of the piston rod 16-1 (the outer diameter is slightly smaller than the inner diameter of the circular opening 64) is on the upper side. The glass monofilament lump introduced into the cartridge 30 through the opening 64 of the cartridge holding disc 40 and pressed inside is pressed downward, and the fiber lump is fed through the opening 64 of the lower cartridge holding disc 42 to the supply cylinder 14. And the cartridge 30 becomes empty. Thereafter, the piston 16-2 is raised and retracted to a position where the rotation of the cartridge holder 44 is not hindered. A control mechanism including a limit switch, an air direction switching valve, and the like is appropriately provided for controlling the operation of the pressing cylinder 16.

Motor 60, i.e., the cartridge holder 44 (the upper and lower cartridge receiving plate 46, 48) starts to rotate again, empty cartridge 30 is fed in the circumferential direction downstream side, the cartridge holder at the site of the discharge station S _C empty cartridge 44 continues (arrow g), but the empty cartridge 30 abuts against the edge 66A of the empty cartridge stopper 66 and cannot move in the rotation direction beyond this position. Since the cartridge pressing members 53 and 54 are rotated counterclockwise around the pin 56 by the spring 58, the empty cartridge 30 that engages the tip of the cartridge pressing members 53 and 54 is kept in the cartridge pressing members 53 and 54. To the discharge chute 72 (arrow j). Even if the cartridge pressing members 53 and 54 that have pushed out the empty cartridge 30 due to the continued rotation of the upper and lower cartridge receiving plates 46 and 48 are separated from the empty cartridge 30, the back surfaces of the cartridge pressing members 53 and 54 that are rotated next ( The empty cartridge 30 is completely sent from the cartridge holder 44 to the discharge chute 72 by the convex surface.

  By repeating and continuing the above operation, a glass single fiber lump is filled into the supply cylinder 14 from a required number of full cartridges 30 and a desired amount of glass single fiber is supplied to the supply cylinder 14 as shown in FIGS. As described, it is opened, mixed and dispersed with a liquid coating material, and a slurry-like coating material containing the desired opened glass monofilament can be obtained.

  In the present invention, a glass single fiber that is mixed and dispersed in a liquid coating material such as acrylic or urethane paint to form a slurry-like coating material is obtained by immersing the glass fiber chopped strand in a solvent, dissolving and removing the spinning sizing agent, In order to eliminate partial agglutination or entanglement between single fibers, each fiber has been completely opened. Since single glass fibers are substantially completely opened one by one, the degree of dispersion in the liquid coating material and the contact area between the glass single fiber and the liquid coating material is maximized, and after solidification It achieves a sufficient reinforcing effect even if the coating film is thin, and does not impair the flexibility of the coating film. The limited reinforcing effect can be exhibited. That is, after immersing the glass fiber chopped strand of the present invention in a solvent and dissolving and removing the spinning sizing agent, a predetermined amount of the single glass fiber opened into one is a liquid coating material such as acrylic or urethane paint. A predetermined amount is mixed into a slurry-like coating material. By applying the slurry-like coating material of the present invention to the repaired surface of the deteriorated concrete and forming a coating film having a required thickness, the deteriorated concrete can be strongly reinforced. That is, in the present invention, the glass single fiber is completely separated into one glass single fiber by opening, so that the contact area between the paint and the glass single fiber is increased to the limit, and the coating film after drying Thus, the desired reinforcement effect can be obtained regardless of its thinness.

  By the way, in response to the Great East Japan Earthquake, the movement of earthquake resistance diagnosis and earthquake reinforcement of buildings has become hot. In particular, the Ministry of Land, Infrastructure, Transport and Tourism has notified the ceilings that were heavily damaged by "strengthening regulations on ceiling dropout countermeasures based on the Building Standards Law" and "administrative guidance on repairs for buildings that should be improved immediately, such as disaster prevention facilities." The Ministry of Education, Culture, Sports, Science and Technology has issued a notification that “A total inspection is being implemented by promoting measures to prevent falling ceilings at school facilities”. Even in such a situation, the slurry-like coating material of the present invention can be repaired with a short work period and a small number of work steps, without requiring significant repair work of the ceiling structure. That is, by applying the slurry-like coating material of the present invention to the entire ceiling surface, the seismic reinforcement of the ceiling structure can be carried out over an extremely short period of time with a small number of man-hours.

  In the present invention, a glass single fiber lump after dissolving and removing the spinning sizing agent in the supply tube 14 or a halogen compound in each cartridge 30 on the upstream side in order to prepare an indoor liquid coating material with added fireproofing and flame retardancy. Etc. can be mixed in an appropriate ratio.

  The reinforcement work according to the present invention is usually performed by applying the slurry-like coating material of the present invention to the surface of the repaired part. Prior to the application of the slurry-like coating material, glass fiber multifilament strands are formed in a comb shape or A web formed by weaving a glass fiber multifilament strand into a mesh shape can also be used as an underlayer. That is, such a comb-like body or web is stuck together with a primer on a surface to be repaired such as a deteriorated concrete structure, and the slurry-like coating material of the present invention is applied thereon. As a result, a thick coating film can be obtained without taking much time, and further reduction in weight of the coating film can be realized. Weaving cloth (cross) made of glass fiber multifilament strands in a comb shape or woven in a mesh form from glass fiber multifilament strands has the thickness of single filament, the number of filaments and the basis weight of the woven fabric Various sizes are changed (usually for FRP products (for example, FRP ships)), and those suitable for the purpose of the present invention can be adopted as appropriate.

DESCRIPTION OF SYMBOLS 10 ... Liquid coating material tank 12 ... Stirring means 14 ... Intermediate supply cylinder 15 ... Fiber opening device 16 ... Pressing cylinder 17 ... Rotary cartridge type fiber lump supply device 18 ... 1st rotary body 18 (fiber bundle scraping member of this invention)
18-2… Disc
18-2B ... Protrusions
18-3 ... spacer 20 ... second rotating body 20 (fiber bundle engaging member of the present invention)
20-2 ... disc
20-2B ... Protrusions
20-3 ... spacer 30 ... cartridge 32 ... lifting motor 35 ... machine frame assembly
40. 42 ... cartridge holding disk 44 ... cartridge holder 44 holds four cartridges 30 in a revolver form 46, 48 ... cartridge receiving plate 50 ... rotating shaft
53, 54 ... cartridge pressing member 58 ... spring 60 ... cartridge holder drive motor 64 ... circular opening 66 ... empty cartridge stopper

Claims (10)

The glass fiber chopped strand is immersed in a solvent to dissolve the spinning sizing agent, and then the glass fiber chopped strand is dried to form a single glass fiber from which the spinning sizing agent has been removed. A method for producing a slurry-like coating material in which fibers are dispersed in a liquid coating material, wherein the glass single fiber from which the spinning sizing agent has been removed remains between the glass single fibers prior to mixing and dispersion with the liquid coating material. A method for producing a slurry-like coating material , wherein the slurry is subjected to fiber opening to eliminate a partially stuck or entangled state. In the invention according to claim 1, the opening of the glass single fiber from which the spinning sizing agent has been removed is a bundle of glass scraped by a protrusion that rotates at a low speed from a lump of glass single fiber from which the spinning sizing agent has been removed. A method for producing a slurry-like coating material , which is carried out by engaging a single fiber with a protrusion that rotates at high speed. 3. The method for producing a slurry-like coating material according to claim 1 or 2, wherein the glass fiber chopped strand has a single glass fiber having a thickness of 3 to 30 [mu] m and a cut length of 3 to 20 mm. 4. The method for producing a slurry-like coating material according to claim 1, wherein the weight ratio of the glass monofilament to the liquid coating material is 0.5% to 10%. In the invention according to any one of claims 1 to 4, the liquid coating material has a viscosity of 20,000 mPa · s to 80,000 mPa · s so as to capture the opened glass single fiber from the opening device. A method for producing a slurry-like coating material. 6. The method for producing a slurry-like coating material according to claim 1, wherein the liquid coating material is mixed with a halogen compound as a flame retardant to form a fireproof / flame retardant coating film. . 3. The invention according to claim 2, wherein the projections rotating at low speed in order to scrape the glass single fiber bundle from the glass single fiber lump are arranged in an axial direction and a circumferential direction , and are scraped off. The protrusions that rotate at a high speed for engaging the bundle and eliminating the partially stuck or entangled state remaining between the glass single fibers form a row in the axial direction and the circumferential direction, and rotate at a low speed. to obtain a glass single fiber stream which is opened by cooperation of the protrusion rows of rotating protrusion rows and fast, by Rukoto blown towards the liquid surface of the liquid coating material in the stirring glass single fiber stream, glass filaments the preparation of the coating material slurried coating material Ru are mixed and dispersed Rutotomoni deposited glass filaments deposited by adhesion by agitation of the liquid coating material in the liquid coating material in the coating material liquid surface in the liquid coating material Method. 8. The method for producing a slurry-like coating material according to claim 7, wherein the stirring of the liquid coating material is performed so as to generate a stirring flow of the liquid coating material in the vertical direction. An apparatus for producing a slurry-like coating material for carrying out the method according to claim 1, comprising a liquid coating material tank containing a liquid coating material, a fiber lump supply tube, a fiber opening means, and a liquid coating material. A stirring means for stirring the liquid coating material in the tank, wherein the opening means is formed by forming axially and circumferentially protruding portions in a row on the outer surface thereof at a low speed, and the lower end of the supply cylinder The fiber bundle scraping member that scrapes off the fiber bundle and the axially and circumferentially protruding portions that rotate at high speed are formed in rows on the outer surface, and scraped off by the fiber bundle scraping member. An apparatus for producing a slurry-like coating material comprising a fiber bundle engaging member that engages with a fiber bundle. 10. The apparatus for manufacturing a slurry-like coating material according to claim 9, wherein the fiber bundle scraping member and the fiber bundle engaging member are arranged so that the protrusion rows alternately enter along the axial direction.

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