JPS6145522B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a composite sheet-like product in which two or more different viscous liquids are alternately laminated in a multilayered manner.

Wide composite sheets, in which different components are arranged in alternating layers in the width direction, have the potential to be used in a variety of applications. For example, FIG. 1 is a perspective view showing an example of such a composite sheet, in which a composite sheet 1 is composed of a synthetic polymer A and another synthetic polymer B alternately laminated in the width direction of the sheet. They are arranged in a shape. Now, synthetic polymer B
If the synthetic polymer A is formed as a carbon-containing component and the synthetic polymer A is a carbon-free component, this composite sheet can be used as a transparent antistatic film. In addition, a synthetic polymer A that dissolves in a specific solvent
A composite sheet is formed from the non-dissolving synthetic polymer B, and two such composite sheets are pasted together so that the alignment directions of the layers intersect with each other, and then treated with the above solvent to dissolve the dissolved component A. is removed to obtain a mesh-like sheet.

The composite sheet described above can be manufactured by an apparatus such as that shown in FIG. That is, in a stock solution supply section 2 to which different synthetic polymers A and B are supplied, there is a lamination section in which a plurality of multilayer laminators 3 are housed in multiple stages to alternately laminate components A and B in a multilayered manner. 4 are connected to each other, and an extrusion mouthpiece 5 having an extrusion slit is provided on the exit side of the laminated portion 4. As this multi-layer laminate 3, static mixers described in Japanese Patent Publication No. 38-19694, Japanese Patent Publication No. 39-437, Japanese Patent Publication No. 8290-44, etc. can be used. These are both two components A,
The basic operation is to bond B together, then redivide it on a plane perpendicular to the bonded surface, and then bond the subdivided composites together again so that the bonded surfaces are parallel. are doing. Therefore,
By repeating this basic operation in multiple stages, a multilayered composite in which components A and B are alternately repeated many times is obtained. Therefore, in the apparatus shown in FIG. 2, components A and B supplied to the stock solution supply section 2 are as follows:
It becomes a multilayered composite flow in the multilayer stacker 3,
By extruding this composite stream as a sheet 1 with its layer direction perpendicular to the slit direction of the die 5, a sheet in which both the A and B components are laminated in multiple layers in the width direction is obtained.

However, according to the results of the study by the present inventors,
The composite sheet obtained from the device shown in Figure 2 is
It was found that the laminated layers of components A and B were not regularly distributed in the cross section, and as shown in FIG. 3, the surface components became irregular with the surface components flowing to both sides toward both ends. Such irregular distribution is undesirable because it causes unevenness in the quality of the above-mentioned applied products. There are various possible causes for this disturbance in the lamination, but when the multilayer composite is extruded from the slit of the extrusion die, the flow expands in the width direction.
This is thought to be caused by the difference in flow velocity distribution and pressure distribution between the center and the ends.

Therefore, an object of the present invention is to solve the above-mentioned drawbacks in producing a multilayer composite sheet, and to provide a sheet-like product that can produce a composite sheet in which multiple layers are regularly arranged in the cross section of the sheet. The aim is to provide manufacturing equipment.

The present invention, which achieves the above objects, comprises a multilayer laminator for forming a multilayer composite by alternately layering two or more different viscous liquids, and an extrusion die having a slit for forming the multilayer composite into a sheet shape. A flow path division changer is provided between the multilayer laminate and the extrusion die, and the flow path division changer directs the flow of the multilayer composite in a direction perpendicular to the layer direction on its inlet side. The flow is divided into a plurality of equal parts, each of the divided flows is moved and rearranged in a direction parallel to the divided plane and merged, and the width of the flow of the multilayered composite after the merge is determined by the pressure The present invention is characterized by an apparatus for producing a sheet-like material configured to have a slit width substantially the same as the slit width of the outlet metal.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details will be explained below by referring to embodiments of the present invention shown in the drawings.

FIG. 4 shows a plan view of an apparatus for producing a composite sheet film of a synthetic high molecular weight polymer according to an embodiment of the present invention. In this FIG. 4, 2 is a stock solution supply section for supplying synthetic polymers A and B, which are different viscous liquids, and 4 is a stock solution supply section for supplying synthetic polymers A and B, which are different viscous liquids. This is a stacking unit that houses a plurality of multilayer stackers 3 in series for stacking the stacks in a multilayered manner. A channel dividing/changing device 6 is connected to the rear portion of the laminated portion 4, and a slit-shaped extrusion mouthpiece 5 is further connected to this channel dividing/changing device 6.
1 is a sheet-like film extruded from an extrusion mouthpiece 5 into a sheet-like shape.

As mentioned above, the multilayer laminate 3 incorporated in the lamination section 4 is a static mixer described in Japanese Patent Publication No. 38-19694, Japanese Patent Publication No. 39-437, Japanese Patent Publication No. 44-8290, etc. Equipment can be used effectively. In particular, the structure shown in FIG. 5 is particularly excellent in reducing turbulence because the viscous liquid, which is a component, is not subjected to repeated extreme compression and expansion during the stacking process.

The multilayer laminate shown in FIG. 5 consists of two parts 51 and 5.
1' is constructed as one unit, and forms a substantially square shape in a plane perpendicular to the flow direction of the liquid.
When the liquid flow is in the direction of the arrow, the component 51 has inlet ports 52 and 53 at diagonal positions of the square on the inlet side, and a horizontal partition wall 54 is interposed between the inlet ports 52 and 53, respectively. However, it remains horizontal and is connected to a passageway heading towards the center.
On the other hand, the component 51' has a vertical partition wall 55 in the center on the flow inlet side, and the passage separated by this partition wall 55 has outlet ports 52' and 53 arranged diagonally in a square on the outlet side. ' will be contacted. The parts 51 and 51' having such a configuration are U-u, V-v, W-w, X-x, respectively, as shown in the drawings.
A multi-layer laminate is obtained by connecting and joining together and fitting this into a rectangular tube having a passage with the same dimensions as the outer periphery.

FIG. 6 schematically shows the behavior of the liquids when both viscous liquids A and B are passed through the multilayer laminate shown in FIG. 5 described above. First, the introduction port 5 of the component 51
In step 2, 53, the A component and the B component are introduced in a phased state. Both components A and B are flowed horizontally to the center, where they are joined and laminated vertically to form a composite flow in a sieved state.
As this composite flow progresses further, it is crushed vertically and expanded and deformed on both sides to form a phase state.
This process of deformation does not involve much change in the cross-sectional area of the flow path. As the flow progresses further from the phase state, the composite flow is divided by the partition wall 55 so as to be perpendicular to the composite planes A and B, resulting in a phase state. When proceeding further from this state, a phase state is reached at the outlet ports 52' and 53'.
In other words, a composite flow is created in which both the A and B components are stacked one above the other.

The above is the lamination operation carried out in a multilayer laminate in which parts 51 and 51' form one unit.
When such units are combined in series in multiple stages,
The state of the phase mentioned above is---
By repeating this process, the number of layers is gradually increased. In other words, when n units of the above are connected in series, the composite flow that is two layers at the inlet becomes two layers at the outlet.
×2 becomes ⁿ layer. For example, if 7 are connected, 256 layers, 9
When connected solidly, it can be made up to 1024 layers.

The flow path dividing/changing device 6 connected after the laminated section 4 is composed of distribution plates 7, 8, 9, and 10. Changes in the flow path in each distribution plate are shown in Figures 7 1 to 6.
is shown. 7.1 is a cross section taken along the line C-C in FIG. 4, FIG. 72 is a cross section taken along the line D-D, FIG. 73 is a cross section taken along the line E-E, and FIG. 74 is a cross section taken along the line E-E. Similarly, the cross section taken along arrow F-F, FIG.
7. The cross section taken in the direction of arrows, FIG. 7, is also a cross section taken in the direction of arrows HH. FIG. 7 shows the entrance side of the extrusion nozzle 5, and shows a cross section taken in the direction of the - arrow in FIG.

As shown in FIG. 7, on the inlet side of the distribution plate 7, channels 7' and 7'' are formed so as to divide the multilayered composite formed by the laminated portion 4 into two halves vertically. The direction of division by the channels 7', 7'' is perpendicular to the layer direction of the multilayered composite. The two upper and lower channels 7' and 7'' of the distribution plate 7 are divided into left and right sides as they approach the distribution plate 8, and as shown in FIG.
The flow paths 8' and 8'' of the distribution plate 8 coincide with each other. Between these, the cross-sectional areas of the flow paths 7' and 7'' are the same as those of 8' and 8'' and there is no change. The flow paths 8' and 8'' of the distribution plate 8 are The flow paths are changed so that the two are parallel and horizontal to each other, and the outlet side is as shown in FIG. 7. The two horizontally lined channels are then further divided vertically into two halves by the next distribution plate 9, as shown in FIG. 7 and 4, forming channels 9' and 9''. In this case, the upper and lower thicknesses of channels 9', 9'' are half of those of channels 7', 7'' or 8', 8'', but the width is 2
It's doubled. Therefore, there is no change in the cross-sectional area as a whole. The flow channels 9', 9'' of the distribution plate 9 are divided to spread left and right as in the case of the distribution plate 7, and the outlet side thereof is as shown in FIG. 7.The distribution plate 10 connected to the distribution plate 9 Similar to the distribution plate 8, the flow channels 9' and 9'' on the outlet side of the distribution plate 9 are arranged horizontally at the outlet as flow channels 10' and 10'' as shown in FIG. From this state, the same thickness as the sum of channels 10' and 10'',
It is connected to the slit 5' of the same width. (FIG. 7) That is, the multilayered composite is divided into equal parts perpendicular to the layer direction in the channel division changer 6, and the division is repeated to arrange the divided parts on a plane, and finally, the slit of the extrusion nozzle 5 is The width and thickness are substantially the same as that of 5'. While this change is repeated, the cross-sectional area of the flow path does not substantially change. Therefore, the multilayered composite is not subjected to any compression or expansion during the process, and the state of the multilayers is hardly disturbed.

Note that in the embodiment, the flow path in the distribution plate is divided into two, but there is no problem in dividing the flow path into three or more as long as it is equally divided.

As described above, according to the present invention, a multilayered composite formed of laminated parts is divided into equal parts in a direction perpendicular to the layer direction by a flow path division changer, and the divided flow is divided into equal parts in a direction perpendicular to the layer direction. Move, rearrange and merge,
Since the width of the multilayered composite flow after merging is made to be substantially the same as the slit width of the extrusion die, it is possible to extrude the multilayered composite into a sheet without changing the layer state. Therefore, according to the present invention, it is possible to obtain a composite sheet in which multiple layers are regularly arranged in the cross section of the sheet.

Note that the present invention can be applied to laminar flow in general, so it can be applied not only to the synthetic polymers mentioned as examples but also to other liquids with high viscosity.
For example, it can be applied to starch syrup in food processing.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a multilayer composite sheet obtained from an apparatus according to the present invention, FIG. 2 is a partially sectional plan view of an apparatus not according to the present invention, and FIG.
FIG. 4 is a partial cross-sectional plan view of a device according to an embodiment of the present invention, FIG. 5 is an exploded perspective view of a multilayer laminate used in the present invention, and FIG. is a schematic diagram showing changes in the fluid given by the multilayer stacker of FIG. 5, and FIGS.
It is a sectional view taken along arrows G, HH, and I-I. 1... Composite sheet, 2... Stock solution supply section, 3...
Multilayer laminate, 4... Lamination section, 5... Extrusion die, 6
...Flow path division changer, 7, 8, 9, 10...Distribution plate.

Claims (1)

[Claims] 1. A multilayer laminate comprising a multilayer composite made by alternately laminating two or more different viscous liquids, and an extrusion die having a slit for forming the multilayer composite into a sheet shape, the multilayer laminate and A flow path dividing changer is provided between the extrusion die and the flow path dividing changer, and the flow path dividing changer divides the flow of the multilayered composite into a plurality of equal parts in a direction perpendicular to the layer direction on the inflow side thereof, Each flow divided into a plurality of equal parts is moved and rearranged in a direction parallel to the divided plane and merged, and the width of the flow of the multilayer composite after the merge is substantially equal to the slit width of the extrusion die. 1. An apparatus for producing a sheet-like material, characterized in that the apparatus is configured to be identical to the above.