JPH0763604B2 - Wet dispersion device and dispersion method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a wet dispersion device, and more specifically, to a wet dispersion device in which a disk is rotated in a vessel via a drive shaft to disperse an object to be dispersed in a medium. Regarding the device.

[Prior Art] As a wet dispersion device for dispersing solids such as pigments, various shapes such as a sand mill, a ball mill and an attritor have been considered.

[Problems to be solved by the invention]

However, in recent years, the demand for atomization has become much higher, and the dispersion device has been improved in response to it.However, it is not possible to disperse in submicron, especially 0.5 μm or less in a short time. However, it was extremely difficult unless it happened to have good dispersibility of the pigment or the like.

An object of the present invention is to solve the above problems and provide a novel wet dispersion device and dispersion method.

[Means and Actions for Solving Problems] That is, the present invention relates to a wet dispersion device in which a disk is rotated via a drive shaft in a vessel, and the disk has a plurality of disks and each disk has a plurality of protrusions. It is a wet dispersion device characterized by having.

The present invention provides a wet dispersion device for rotating a disk through a drive shaft in a vessel, wherein the disk has a plurality of the disks and each disk has a plurality of protrusions and a plurality of holes. It is a device.

The present invention provides a dispersion method for dispersing an object to be dispersed using a medium and a rotating disk, wherein the plurality of disks are used and each disk is provided with a plurality of protrusions. is there.

Further, the present invention provides a dispersion method for dispersing an object to be dispersed using a medium and a rotating disk, wherein a plurality of the disks are used and each disk is provided with a plurality of protrusions and a plurality of holes. Is a dispersion method.

These protrusions give a strong share to the medium and generate turbulence when the disc rotates, so that the dispersion efficiency is dramatically improved, and the substance to be dispersed in a sub-micron region, especially in a short time.
It can be made into ultrafine particles of 0.5 microns or less.

In the present invention, the shape of the projection provided on the disk is not particularly limited, but according to many experiments, a projection having a truncated cone shape or a curved surface is preferable. Further, it is preferable that the protrusion is detachably provided on the disc. This is because the protrusions wear as the dispersion share increases, but if the protrusions can be replaced appropriately, the media can always be dispersed under constant conditions, and the consumable member can also be projected. This is because there are many advantages such as the cost required for maintenance by the body alone being low.

Further, in the present invention, when a plurality of holes are provided in the disc together with the protrusions, the medium passes vertically through the holes when the disc rotates, so that turbulent flow above and below the disc is promoted, and as a result, The dispersion efficiency can be remarkably improved.

Further, in the present invention, it is preferable that an angle formed by the surface of the front surface portion and the disk with respect to the rotation direction of the projection of the disk is 80 ° or less. This is because when it is 80 ° or less, wear is small when repeatedly used, and it is excellent in terms of stabilization of dispersion conditions and economical efficiency, and the dispersion efficiency is remarkably improved. Conversely, the angle between the disc and the above-mentioned protrusion is 80
If it exceeds 0 °, the dispersion efficiency will not be improved despite the load being applied to the drive system of the disk, and the protrusions will be abraded severely.

Next, the present invention will be described more specifically with reference to examples.

Example 1 Example 1 In the wet dispersion apparatus shown in FIG. 1, 1 is a vessel, which is surrounded by a jacket 2. See also vessel 1
The shaft 5 connected to the drive device 4 is inserted inside,
Two discs 3 each having a plurality of protrusions 6 provided on one surface thereof are attached to the lower portion of the shaft 5 as is more apparent from FIG.

When the shaft 5, was driven after charging the media, the pigment and the solvent vehicle into this wet dispersion device, the projection 6 gives a share to the medium and causes a turbulent flow, so that the dispersion efficiency is higher than that in the case without the projection 6. It has improved dramatically. As a result of conducting dispersion experiments of various organic and inorganic pigments, it was possible to obtain a stable dispersion liquid having a particle size of 0.05 to 0.3 μm.

Example 2 The wet dispersion apparatus shown in FIG. 3 is basically the same as that of FIG. 1 in that it is basically composed of a vessel 1 and a disk 3, but the difference is that a plurality of projections 6 provided on the disk 3 are provided.
4 was defined as a truncated cone shape as is more apparent in FIG. 4, an experiment similar to that of Example 1 was performed using this wet dispersion apparatus, and almost the same satisfactory results (dispersion efficiency) were obtained. , Particle size) was obtained.

Example 3 A wet dispersion device shown in FIG. This device is basically the same as that of FIG. 1 in that it is basically composed of a vessel 1 and a disk 3, but the difference is that the shapes of a plurality of protrusions 6 provided on the disk 3 are shown in FIG. As is clear, this is the point defined on the curved surface. When an experiment similar to that of Example 1 was conducted using this wet dispersion device, almost the same results were obtained in terms of dispersion efficiency and particle size, and since the projections 6 had a curved surface, Wear and load on the drive system were reduced, and stable dispersion conditions could be maintained.

Example 4 A wet dispersion device shown in FIG. This device is basically the same as that shown in FIG. 1 in that it is composed of a vessel 1 and a disk 3, and the difference is that as shown in FIG. The point is that it is made removable and removable. Example 1 using this wet dispersion device
When the same experiment was conducted, the same satisfactory results (dispersion efficiency, particle size) were obtained.

In order to detachably attach the protrusion 6 to the disc 3, the protrusion 6 may be fixed with a screw 7 from the back side of the disc 3 as shown in FIG.

Example 5 A wet dispersion device shown in FIG. This device is composed of a vessel 1 and a disk 3 and is basically the same as that shown in FIG. 1, except that the disk 6 is added to the disk 3 in addition to the projections 6 as shown in FIGS. 11 and 12. The point is that a plurality of holes are provided.

When the same experiment as in Example 1 was conducted using this wet dispersion device, in particular, since the medium passes vertically through the holes, turbulent flow above and below the disk 3 is promoted, and the dispersion efficiency is dramatically improved. Also, various inorganic and organic pigment dispersion experiments were conducted, and a satisfactory dispersion similar to that of Example 1 was obtained.

Example 6 The wet dispersion apparatus shown in FIG. 13 is basically composed of a vessel 1 and a disk 3, and the disk 3 has a plurality of protrusions 6.
Is installed. As is apparent from FIG. 14, the angle formed by the surface of the front surface 6a and the disk 3 with respect to the rotation direction of the protrusion 6 of the disk 3 is 80 ° or less.

When the same experiment as in Example 1 was carried out using this wet dispersion device, the abrasion of the protrusions 6 was slight even after repeated use, and the dispersion efficiency was also excellent. Also, in the dispersion experiments of various inorganic and organic pigments, the same stable dispersion liquid as in Example 1 was obtained.

[Advantages of the Invention] The wet dispersion device of the present invention is a novel wet dispersion device in which a disk is rotated in a vessel and a plurality of protrusions are provided on the disk. Since the body gives a strong share to the medium and causes turbulence, the dispersion efficiency is dramatically improved, and the substance to be dispersed can be made into ultrafine particles in the submicron region in a short time. Therefore, it is extremely useful for the purpose of dispersing pigments used in electrophotographic photoreceptors, for example.

[Brief description of drawings]

1, FIG. 3, FIG. 5, FIG. 7, FIG. 7, FIG. 10 and FIG. 13 are cross-sectional views of a wet dispersion apparatus according to different embodiments of the present invention. 2 is a cross-sectional view of the disk of the wet dispersion apparatus shown in FIG. 1 as seen from the side surface, FIG. 4 is a cross-sectional view of the disk of the wet dispersion apparatus as shown in FIG. 3 as seen from the side surface, and FIG. FIG. 8 is a cross-sectional view of the disk of the wet dispersion apparatus shown in FIG. 8, and FIGS. 8 and 9 are cross-sectional views of the disk of the wet dispersion apparatus shown in FIG. FIG. 12 is a cross-sectional view of the disk of the wet dispersion device shown in FIG. 12, viewed from the side, FIG. 12 is a plan view thereof, and FIG. 14 is a side view of the wet dispersion device shown in FIG. 1 ... Vessel, 2 ... Jacket, 3 ... Disc,
4 ... Driving device, 5 ... Shaft, 6 ... Projection body, 6a ...
... front surface of the protrusion, 7 ... screw, 8 ... hole.

Claims (8)

[Claims] 1. A wet dispersion apparatus for rotating a disk in a vessel via a drive shaft, wherein the disk has a plurality of disks and each disk has a plurality of protrusions. 2. A wet dispersion device for rotating a disk through a drive shaft in a vessel, wherein the disk has a plurality of disks, and each disk has a plurality of protrusions and a plurality of holes. Dispersion device. 3. The wet dispersion device according to claim 1 or 2, wherein the protrusion of the disk is removable. 4. The wet dispersion device according to claim 1, wherein the projection of the disk has a truncated cone shape. 5. The wet dispersion device according to claim 1, wherein the projection of the disk has a curved surface. 6. The angle formed by the surface of the front surface portion and the disk with respect to the rotation direction of the disk projection of the disk is 80.
The wet dispersion device according to claim 1 or 2, wherein the wet dispersion device is at most °. 7. A dispersion method for dispersing an object to be dispersed using a medium and a rotating disk, wherein a plurality of the disks are used and a plurality of protrusions are provided on each disk. . 8. A dispersion method for dispersing an object to be dispersed using a medium and a rotating disk, wherein a plurality of the disks are used and a plurality of protrusions and a plurality of holes are provided on each disk. Characterizing dispersion method.