JP2001124691A - Method and device for measuring and testing degree of dispersion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring and testing method and device for degree of dispersion capable of quantitatively grasping the degree of dispersion of a dispersed matter in a viscous material and finding an optimum value for efficiently performing the elongation fluidized dispersion. SOLUTION: This measuring and testing device for degree of dispersion comprises a passage body having a major passage 1a and a slit-like passage 2a to supply a viscous material containing a dispersed matter from the major passage 1a side; a pushing means 4 provided on the major passage 1a side of the passage body to forcedly push and disperse the material supplied to the passage body from the slit-like passage 2a side; and a temperature regulating means 6 provided around the passage body to regulate the temperature of the material poured into the passage body, and at least one of the following values is variable in this device. In this measuring and testing method for degree of dispersion, this device is used to quantitatively grasp the relation between degree of dispersion and inflow pressure loss in the inflow of the material from the major passage la to the slit-like passage 2a with the above variable value as variable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dispersity measuring and testing apparatus for finding an optimum value to be set when manufacturing a dispersing apparatus to which the elongational flow dispersion is applied.

[0002]

2. Description of the Related Art Elongated flow dispersion is described in Prof. Utrack
i is the dispersion method found. The elongational flow dispersion will be briefly described with reference to FIG. 8, reference numeral 51 denotes a large passage having a large cross-sectional area, 52 denotes a small passage having a smaller cross-sectional area than the large passage, and 53 denotes a flow of a viscous material inside the large passage 51, which contains a substance to be dispersed. , An arrow 53 in the large passage 51 and the small passage 52.
Plunger that applies pressure in the direction, 55 is a sealing member that fills the gap between the plunger 54 and the large passage 51, 56 is a transition passage from the large passage 51 to the small passage 52, and 57 is a performance of the transition passage 56. Is an inflow angle. The elongational flow dispersion means that a viscous material contained in an object to be dispersed flows from a large passage 51 having a large cross section into a small passage 52 having a minimum cross section and a predetermined length having a small cross section. This means that the material to be dispersed is crushed into small pieces and dispersed by passing through the passage 52. The principle of the dispersion is that the large passage 51 and the small passage 52
With the change in the flow velocity when passing through the object, the object to be dispersed is stretched, broken at the stress limit, and dispersed.
Prof. Utracki concludes that there is a dispersing effect in proportion to the total pressure loss of the flowing material from the time the material flows into the large passage 51 and exits through the small passage 52. Prof. Utracki et al. In U.S. Pat.
1,106.

[0003]

By the way, the viscous material containing the material to be dispersed is caused to flow from a large passage 51 having a large cross section into a small passage 52 of a predetermined length having an extremely small cross section to perform the elongation flow dispersion. However, the present inventor considered that there should be an optimum value for efficiently performing elongational flow dispersion such as the cross-sectional area of the large passage 51 and the small passage 52 for each material.

An object of the present invention is to quantitatively grasp the degree of dispersion of a substance to be dispersed in a viscous material,
An object of the present invention is to provide a dispersity measurement test device and a dispersity measurement test method which can find an optimum value for efficiently performing elongation flow dispersion.

[0005]

Means for Solving the Problems In order to achieve the above object, the present inventor has further studied the above-mentioned elongational flow dispersion. Prof. As described above, Utracki is such that the material flows into the first passage 51 and the second passage 5
It is concluded that there is a dispersing effect in proportion to the total pressure drop of the flow material until it comes out through 2. The inventor has
According to the experiment, the pressure loss of the fluid material was reduced to the following two points A as shown in FIG.
I confirmed what happened in B. A: Inflow pressure loss when flowing from a large passage 51 having a large cross section to a small passage 52 having a very small cross section B: Small passage flow pressure when flowing through the small passage 52 having a predetermined length and having a very small cross section Loss It was found that B had little dispersion effect on the flow pressure loss, and that the dispersion was promoted with respect to the inflow pressure loss of A.

[0006] Based on the above findings, the dispersion measurement test method of the present invention according to claim 1 provides a passage body having a large passage having a large cross-sectional area and a small passage having a smaller cross-sectional area than the large passage. The viscous material containing the material to be dispersed is supplied from the large passage side, and the degree of dispersion in the dispersion method of forcibly extruding from the small passage side and dispersing the dispersion material in the viscous material is changed from the large passage to the small passage. It is characterized quantitatively by the relationship between the pressure and the inflow pressure loss when the material flows.

According to the test method of measuring the degree of dispersion of the present invention, the degree of dispersion is quantitatively grasped by the relationship with the inflow pressure loss when the material flows from the large passage into the small passage of the passage body. It is possible to find the inflow pressure loss that enables the dispersion to be performed most efficiently.

Further, according to a second aspect of the present invention, in addition to the features of the first aspect, the dispersion degree and the large value are obtained by using at least one of the following values as a variable. It is characterized in that the relationship with the inflow pressure loss when the material flows from the passage into the small passage is quantitatively grasped. Cross-sectional area of the small passage Ratio of cross-sectional area of the large passage and the small passage Inflow angle when flowing from the large passage to the small passage of the passage body Extrusion pressure Material temperature

According to the dispersion degree measurement test method, by changing at least one of the above values, the dispersion degree with respect to the change in the inflow pressure loss when the material flows from the large passage to the small passage of the passage body. Because of the quantitative understanding of the relationship between changes in the flow, it is possible to find the optimal values for the values that must be specifically set, such as the dimensions of the passages, when manufacturing mixers and the like that apply the elongational flow dispersion. it can.

According to a third aspect of the present invention, there is provided a dispersion degree measuring and testing apparatus according to the present invention, wherein a large passage having a large sectional area and a small passage having a smaller sectional area than the large passage are formed in the passage body. The viscous material inherent in the large passage is poured from the large passage side, forcibly extruded from the small passage side and subjected to elongation flow dispersion, the dispersion degree measurement test device for quantitatively grasping the dispersion degree, the large passage The inlet pressure loss when the material flows into the small passage from is variable, and the degree of dispersion is quantitatively grasped based on the relationship with the inlet pressure loss.

[0011] According to the dispersity measurement test apparatus, the inflow pressure loss when the material flows from the large passage into the small passage is variable, and the dispersity is quantitatively determined by the relationship with the inflow pressure loss. Therefore, it is possible to find the inflow pressure loss at which the dispersion can be performed most efficiently.

More specifically, the dispersion degree measuring and testing apparatus according to the present invention has a large passage having a large sectional area and a slit-shaped passage having a sectional area smaller than the large passage. A viscous material contained therein is supplied from the large passage side; and an end of the large passage of the passage body for forcibly extruding and dispersing the material poured into the passage body from the slit-like passage side. Extrusion means provided in the, comprising a temperature adjusting means provided around the passage body to adjust the temperature of the material poured into the passage body, at least one of the following values is variable, By changing the variable value, the degree of dispersion is quantitatively grasped based on the relationship with the inflow pressure loss. Slit width of the slit passage Ratio of the cross-sectional area of the large passage and the slit passage Inflow angle from the large passage to the slit passage Extrusion pressure by the extrusion unit Material temperature by the temperature adjustment unit

According to the dispersion degree measuring and testing apparatus, at least one of the above values is changed to disperse the change in the inflow pressure loss when the material flows from the large passage of the passage body into the slit-like passage. Since the relationship of the degree of change is quantitatively grasped, it is possible to find the optimum values such as the dimensions of the passage body, which must be set specifically, when manufacturing a mixer or the like to which the extension flow dispersion is applied. .

According to a fifth aspect of the present invention, there is provided a dispersity measuring and testing apparatus according to the present invention, further comprising a pressure gauge for measuring a pressure in the middle of the slit-shaped passage. And According to the dispersity measuring test device, since the pressure gauge for measuring the pressure in the middle of the slit-shaped passage is provided, the value of the inflow pressure loss is calculated according to the relations of Expressions (1 ′) and (2) described later. Can be obtained by one measurement.

According to a sixth aspect of the present invention, in addition to the fourth aspect, the length of the slit-shaped passage is variable. According to the dispersity measurement test apparatus, the length of the slit-shaped passage is variable, so that the value of the inflow pressure loss can be inexpensively measured twice by the relationship of the following equations (1 ′) and (3). Obtainable.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a cross-sectional view of a dispersion degree measurement test apparatus according to the present invention as viewed from a side. 1 is a cylinder, 2 is a die, 4 is a plunger, 5 is a sealing member, 6
Denotes a passage for flowing a temperature adjusting fluid, 8 denotes a holding member for holding the die 2, and 9 denotes a screw for fixing the holding member 8 to the tip of the cylinder 1. FIG. 1B is a diagram showing the die 2 as viewed from the line AA in FIG. 1A.

In the dispersity measuring test apparatus of the present invention, the passage body into which the viscous material containing the substance to be dispersed is poured is:
It is constituted by a large passage 1a formed in the cylinder 1 and a small passage 2a formed in the die 2, and the material flows in from the large passage side of the passage body. Cylinder 1
Has a cylindrical passage 1a having a diameter W1 therein and constitutes a large passage of a passage body through which a material flows. This large passage 1a
Has a larger cross-sectional area than a small passage 2a described later. A temperature adjusting flow path 6 for flowing a temperature adjusting fluid for adjusting a material temperature is formed in a cylinder wall forming such a cylinder 1. The temperature adjusting flow path 6 constitutes a temperature adjusting means provided around the passage body.

The cylinder 1 has a cylindrical passage on the upper side and an ultra-fine rectangular slit-like passage 2 on the lower side.
It may be a prismatic passage according to the shape of a. At this time, the length of the cylindrical passage has a length corresponding to at least the stroke distance of the plunger. The cross-sectional area of the passage contributing to dispersion is the cross-sectional area of the lower prismatic passage.

The die 2 has a slit-like passage 2a having a passage length L.
Inside thereof to form a small passage of the passage body through which the material flows. The small passage 2a has a smaller sectional area than the large passage 1a. The cross section of the slit-shaped passage 2a is an extremely fine rectangular cross section, and has a slit shape. The cross-sectional area is slit width (W2) x slit length (W3),
The slit width W2 is considerably smaller than the slit length W3. In addition, the cross-sectional area is temporarily reduced on the upper part of the die 2,
An inflow passage portion 2e for specifying an inflow angle θ when the material flows from the large passage 1a to the small passage 2a is provided.

The external shape of the die 2 is formed by a cylindrical portion 2b and a flange 2c at an end thereof. The flange 2c is provided at an end on the side from which the material of the slit-shaped passage 2a flows out, and contacts the end of the cylinder 1 when the cylindrical portion 2b is inserted into the large passage 1a of the cylinder 1. The portion 2b projects radially so as to fix the position in the large passage 1a. Such a die 2 is inserted into the tip of one end of the cylinder 1 and is detachably attached.

In the dispersity measuring test apparatus of the present invention, the slit-shaped passage 2a and the material passage angle θ from the large passage 1a to the slit-shaped passage 2a are made variable in order to make the cross-sectional area of the slit-shaped passage 2a variable. A plurality of dies with variously changed cross-sectional areas of 2a and a plurality of dies with variously changed inflow angles θ are prepared in advance, and are replaced every measurement as needed. For example, the die 2 in which the slit width W2 is changed from 0.03 mm to 1.00 mm with the slit length W3 of the slit-shaped passage 2a as a constant in order to change the cross-sectional area of the slit-shaped passage 2a. A die in which the ratio of the cross-sectional area of the large passage 1a to the slit-shaped passage 2a is changed between 10 and 1000. Inflow angle θ from 90 ° to 180 °
Die changed between.

The large passage 1a extends from the slit passage 2a.
When the second method described later is adopted as a method of measuring the inflow pressure loss when the material flows into the dies, two types of dies having different slit-shaped passages 2a are prepared for each of the dies.

The holding member 8 has a cylindrical shape with a low height, and has a passage 8a inside so as not to block the slit-like passage 2a. A pedestal portion 8b for accommodating the die flange 2c is formed on the surface of the passage 8a. The depth of the pedestal portion 8b is the flange 2c of the die.
When the flange 2c of the die is stored in the pedestal portion 8b, one surface 8c of the holding member 8 and one surface 2d of the flange 2c are connected flat. When the die 2 is inserted into one end of the cylinder 1, these surfaces 8 c and 2 d come into contact with one end of the cylinder 1. One end of the cylinder 1 and the holding member 8 are provided with holes into which screws 9 are inserted.
When the screw 9 is tightened in a state where one surface 2d of the flange 1c and one surface 2d of the flange 2c are in contact with one end of the cylinder 1, the die 2
The holding member 8 is fixed to one end of the cylinder 1. When replacing the die 2, the screw 9 is loosened, the holding member 8 is removed, and the die 2 is replaced.

The plunger 4 is a large passage 1 of the passage body.
The large passage 1a of the passage body for forcibly extruding and dispersing the material supplied from the side a from the slit-shaped passage 2a side.
The pushing means is provided at the end on the side, and generates a pushing pressure P in the direction of the arrow on the large passage 1a side of the passage body. The extrusion pressure P is adjusted by the speed of the plunger 4,
The throughput is also adjusted by the speed of the plunger 4. The sealing member 5 fills and seals the gap between the plunger 4 and the large passage 1a of the passage body. The pushing means is not limited to the plunger type as described above, but may be a screw type. In that case, the extrusion pressure P is adjusted by the rotation number of the screw, and the extrusion amount is also adjusted by the rotation number of the screw.

According to the dispersion degree measuring and testing apparatus of the present invention having the above structure, the dispersion degree when the following values are changed as variables and the material flows from the large passage 1a into the slit-like passage 2a. The relationship with the inflow pressure loss at the time can be grasped quantitatively. a Slit width of the slit-shaped passage 2a b Ratio of cross-sectional area of the large passage 1a to the slit-shaped passage 2a c Inflow angle θ from the large passage 1a to the slit-shaped passage 2a d Extrusion pressure Pe by the pushing means Material temperature by the temperature control means

Regarding the above a to c, the degree of dispersion and the large passage 1a of the passage
When the inflow pressure loss when the material flows into a is measured and the data is arranged, the relationship between the degree of dispersion and the inflow pressure loss can be quantitatively grasped. In addition, the degree of dispersion is based on the fact that as the dispersion progresses, the particles of the material to be dispersed in the material become smaller, and the size of the particles of the material to be dispersed in the material after dispersion is measured by a microscope or the like. Then, it is determined that the finer the particles, the more efficiently the particles are dispersed. Therefore, the degree of dispersion is obtained as an average particle diameter.

Next, a test method for measuring the degree of dispersion using the apparatus for measuring the degree of dispersion of the present invention having the above structure will be described. First, there are two methods for measuring the inflow pressure loss ΔPe when the material flows from the large passage 1a into the slit-like passage 2a, and therefore, the method will be described first. The following relationship exists with respect to the pressure loss.

[0028]

(Equation 1)

Here, ΔP: overall pressure loss (from large passage 1a to slit-like passage 2)
ΔPe: inflow pressure loss (pressure loss when material flows from large passage 1a into slit-like passage 2a) ΔPs: slit-like passage flow pressure loss (in slit-like passage 2a) The pressure loss in the large passage (large passage 1a)
Pressure loss when flowing through the inside) is neglected. Actually, the pressure loss in the large passage 1a is negligibly small.

The total pressure loss ΔP is a value that changes depending on the thrust, speed, and the like of the plunger that is the pushing means. Specifically, first, the extrusion pressure P is measured by a pressure gauge installed on the plunger pressing surface, or is calculated by measuring the reaction force of the plunger. Next, the pressure _Pout at the end on the material discharge side of the slit-shaped passage 2a is measured. Then, the extrusion pressure P and the pressure P at the end on the material discharge side are determined.
The difference from _out is defined as the total pressure loss ΔP.

ΔPs can be measured by the following two methods. ΔPe is obtained by substituting ΔPs obtained by any one of these two methods and the value of ΔP into equation (1 ′).

[First Method] The first method will be described with reference to FIG. The pressure P ₀ at a position L ₀ from the material discharge side end of the slit passage 2 a is measured by the pressure gauge 10. ΔPs is calculated by equation (2). According to the first method, there is an advantage that only one measurement is required as compared with a second method described later, but it is expensive because a pressure gauge must be prepared.

[0033]

(Equation 2)

[Second Method] The second method will be described with reference to FIG. The passage length of the slit passage 2a is L and L ₀₀
Prepare an apparatus different from the above and calculate from two tests. Specifically, dies having different slit lengths of the passage 2a are prepared. Various conditions such as the inflow angle θ, the slit width and the slit length of the slit-shaped passage 2a, the extrusion pressure P, and the material temperature are the same in the two tests. First, the total pressure loss ΔP when the length of the slit-like passage 2a is L is measured. The length of the slit-shaped passage 2a to measure the overall pressure drop [Delta] P ₀₀ when the L _00. Equation (3) gives ΔP
Calculate s. According to the second method, it is necessary to perform the measurement twice under the same conditions, such as the extrusion pressure, etc., but one more die is prepared which is different in cost from the slit-shaped passage 2a. , It is cheaper than the first method.

[0035]

(Equation 3)

In this way, ΔPe (inflow pressure loss) is obtained from the measured value ΔP (total pressure loss) and the measured value ΔPs (slit-shaped passage flow pressure loss).
Based on the fact that there are two methods for measuring s (slit passage flow pressure loss), an example of the dispersion measurement test method using the dispersion measurement test apparatus of the present invention will be specifically described.

From the relationship of the above equation (1 ′), the inflow pressure loss Δ
Pe changes when the total pressure loss ΔP or the slit-shaped passage flow pressure loss ΔPs changes. Further, the dispersity measurement test apparatus of the present invention can change the following values as described above. Among the values, changes in the values of a, b, and c are as follows:
This affects the slit-shaped passage flow pressure loss ΔPs. d, e
Changes the total pressure loss ΔP. aSlit width of slit passage 2a b Ratio of cross-sectional area of large passage 1a to slit passage 2a cInflow angle from large passage 1a to slit passage 2a dExtrusion pressure eMaterial temperature

Accordingly, the measuring method according to the embodiment of the present invention changes the total pressure loss ΔP by a predetermined degree by the d extrusion pressure to change the inflow pressure loss ΔPe,
This is a method for measuring a change in the degree of dispersion due to a change in the inflow pressure loss ΔPe.

Here, d is a first variable, and a,
The value of b is a second variable, and the values of c and e are constants. (1st variable) d Extrusion pressure is _Pi ( _i is an integer from 1 to n)
And (Second variable) Let the slit width be W2 _i ( _i is an integer from 1 to n). However, the slit length W3 is constant. (Constant) c Let the inflow angle be θ. e Let T be the material temperature.

First, the relationship between the inflow pressure loss ΔPe _i ( _i is an integer from 1 to n) and the extrusion pressure P _i is described in advance in the above-mentioned first pressure.
Alternatively, it is measured by one of the second methods.

Next, attaching the second slit width of said a second variable the slit-shaped passage 2a is W2 ₁ to the tip of the cylinder 1. Then, a temperature control fluid for raising the temperature is passed through the passage 6 of the temperature control means provided around the cylinder 1, and the temperature of the cylinder 1 is raised until a predetermined temperature T is reached. Next, the material is poured into the large passage 1a in the cylinder and filled. Due to the temperature control fluid in the passage 6 of the temperature control means, the material is
The temperature is increased until the temperature becomes equal to the predetermined temperature T. continue,
The plunger 4 is moved from the end on the side of the large passage 1a to the end on the side of the slit-shaped passage 2a in the large passage 1a of the cylinder. At this time, the extrusion pressure P by the plunger 4 is moved to a predetermined extrusion pressure P _1. The slit width at W2 _1, to measure the degree of dispersion when the extrusion pressure P _1.

The measurement as described above is performed using the second variable
Set width to W2₁And the first variable, extrusion
Pressure P_iTo P₁To P_nChange by a predetermined amount until
Do it back. Then, the measured value is displayed in the group shown in FIG.
The degree of dispersion and the inflow pressure loss ΔPe expressed in rough etc.
Quantitatively grasp the relationship between The above is the second variable
Cut width W2_iThis is an example in which
The measurement as described above is performed by replacing the die 2 with the slit-shaped passage 2.
a slit width W2 _i(_iIs an integer from 1 to n)
Repeat.

[0043]

FIG. 5 shows a specific relationship between the degree of dispersion and the inflow pressure loss obtained by the dispersion degree measurement test apparatus and the dispersion degree measurement test method of the present invention. In FIG. 5, HDPE (High-density polymer) was introduced into Nylon6.
(Hylen) was measured. The particle size after dispersion was measured as the degree of dispersion. Each value was set as follows. (Constant) c Inflow angle θ = 180 ° (constant) e Material temperature T = 275 ° C (constant) (first variable) d Extrusion pressure P _i (second variable) a Cross-sectional area of slit-shaped passage 2a is W2 _i ×
And W3, the slit width W2 _i of the slit-like passage 2a W
_{2 1 = 0.1mm, W2 2 =} 0.3mm, W2 3 = 0.
It was changed to 5 mm. Here, the slit length W3 = 4m
m, the passage length L = 10 mm. The diameter W1 of the large passage 1a of the b-passage body was set to 10 mm (constant), and the ratio of the sectional area of the large passage 1a to the slit passage 2a was changed by the sectional area of the slit passage 2a.

The condition when the average particle diameter indicating the degree of dispersion becomes the smallest is the width W of the slit-shaped passage 2a of the passage body.
It was when _i was 0.5 mm. In this case, the width W _i of the slit-shaped passage 2a it is seen that preferably the 0.5 mm. When the inflow pressure loss ΔPe is about 30 to 50 kgf /
It can be seen that it is better to set the pressure to be cm ² [3 to 5 MPa]. As described above, according to the dispersion degree measurement test apparatus and the dispersion degree measurement test method of the present invention, it is possible to find an optimum value suitable for elongational flow dispersion of a selected variable. If a device such as a mixer based on elongational flow dispersion is manufactured based on this optimum value, a device having good elongational flow dispersion characteristics can be obtained.

As described above, the value to be a constant and the value to be a variable are appropriately selected as necessary, and the degree of dispersion and the inflow pressure loss Δ
By quantitatively grasping the relationship with Pe, the slit width of the slit-like passage 2a, the ratio of the cross-sectional area of the large passage 1a and the cross-sectional area of the slit-like passage 2a required when manufacturing a dispersion target machine, etc.
It is possible to find the optimum values of the values such as the inflow angle, the material temperature, and the extrusion pressure.

The viscous material measured by the dispersion measurement test method and the dispersion measurement test apparatus of the present invention is mainly a polymer material. For reference, FIG. 6 shows a photograph of dispersion of HDPE in Nylon 6 by elongational flow dispersion. Small white circles dotted in FIG. 6 are HDPE particles. The white straight line at the lower right indicates the scale size, and indicates the length of 0.5 μm. FIG. 7 is a comparative example with respect to FIG. 6, and is a photograph showing dispersion of HDPE in Nylon 6 by shear dispersion. It was sheared by the screw of the twin screw extruder. FIG.
Small white rings interspersed are HDPE particles. The white straight line at the lower right indicates the scale size, and indicates the length of 0.5 μm.

It can be seen that the elongational flow dispersion has smaller HDPE particles than the shear dispersion. In the future, it is conceivable that demand for dispersion target machines and the like due to extended flow dispersion will increase. Before manufacturing a dispersing machine by the elongational flow dispersion, etc., the optimum value of each value is found by the dispersion degree measurement test apparatus and the dispersion degree measurement test method of the present invention, and the elongational flow dispersion is performed based on the optimum value. When a dispersion purpose machine or the like is manufactured, it is possible to efficiently manufacture a dispersion purpose machine or the like that can perform elongational flow dispersion, which reduces the number of trial and error and leads to a reduction in manufacturing cost.

[0048]

According to the first and third aspects of the present invention, the dispersity measuring test method and the dispersity measuring test apparatus according to the present invention are capable of controlling the degree of dispersion when a material flows from a large passage into a small passage of a passage body. Since it is quantitatively grasped by the relationship with the pressure loss, it is possible to find the inflow pressure loss that can perform the dispersion most efficiently. The cross-sectional areas of the large passage and the small passage of the passage body are set so that this inflow pressure loss can be realized,
When a dispersing machine such as a mixer to which the extended flow dispersion is applied is manufactured, a dispersing machine capable of performing the most efficient dispersion can be obtained.

According to a second aspect of the present invention, there is provided a dispersion measuring method and a dispersion measuring apparatus according to the present invention, wherein at least one of the following values is changed from a large passage to a small passage of the passage body. Since the relationship between the change in the degree of dispersion and the change in the inflow pressure loss when the material flows in is quantitatively grasped, the size of the passage body is required when manufacturing a dispersing machine such as a mixer that applies the elongational flow dispersion. It is possible to find the optimum value that has to be set specifically, such as. As a result, it is possible to manufacture a dispersion target machine capable of performing dispersion most efficiently. Cross-sectional area of small passage or slit width of slit-shaped passage Ratio of cross-sectional area of large passage and small passage Inflow angle Extrusion pressure by extrusion means Material temperature by temperature control means

According to a fifth aspect of the present invention, there is provided a dispersity measuring test apparatus having a pressure gauge for measuring a pressure in the middle of the slit-shaped passage. There is an effect that the value of the pressure loss can be obtained by one measurement. According to the dispersity measuring test apparatus of the present invention described in claim 6, since the length of the slit-shaped passage is variable, the value of the inflow pressure loss is measured twice in addition to the effect described in claim 4. Can be obtained at lower cost.

[Brief description of the drawings]

FIG. 1 is a diagram showing a dispersion degree measurement test apparatus according to the present invention.

FIG. 2 is a diagram for explaining a method of measuring an inflow pressure loss ΔPe by the dispersion measuring apparatus according to the present invention.

FIG. 3 is a diagram illustrating a method for measuring an inflow pressure loss ΔPe by another dispersity measuring test device according to the present invention.

FIG. 4 is an example of a graph showing the relationship between the degree of dispersion and the inflow pressure loss ΔPe.

FIG. 5 shows the degree of dispersion and the pressure loss Δ in the inlet according to an embodiment of the present invention.
It is a graph which shows the relationship of Pe.

FIG. 6 is a view showing a photograph of dispersion of HDPE into Nylon 6 by elongational flow dispersion.

FIG. 7 is a comparative example with respect to FIG.
It is a figure which shows the dispersion | distribution photograph of NPE in Nylon6.

FIG. 8 is a diagram illustrating elongational flow dispersion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder 1a Large passage 2 Die 2a Slit passage 4 Plunger (extrusion means) 5 Seal member 6 Temperature control fluid passage (Temperature control means) 8 Die holding member 9 Screw W1 Cylinder inner diameter W2 Slit of slit passage Width θ Inflow angle P Extrusion pressure

Claims (6)

[Claims] 1. A viscous material containing an object to be dispersed is supplied from a large passage side to a passage body in which a large passage having a large sectional area and a small passage having a smaller sectional area than the large passage are formed. The degree of dispersion in the dispersion method for forcibly extruding the material to be dispersed in the viscous material from the large passage is quantitatively grasped based on the relationship with the inflow pressure loss when the material flows from the large passage to the small passage. Dispersion measurement test method. 2. The method according to claim 1, wherein at least one of the following values is used as a variable to quantitatively grasp a relationship between the degree of dispersion and an inflow pressure loss when the material flows from the large passage into the small passage. Test method for measuring the degree of dispersion described in 1. Cross-sectional area of the small passage Ratio of cross-sectional area of the large passage and the small passage Inflow angle when flowing from the large passage to the small passage of the passage body Extrusion pressure Material temperature 3. A viscous material containing an object to be dispersed flows into a passage body having a large passage having a large sectional area and a small passage having a smaller sectional area than the large passage. It is a dispersibility measurement test device for forcibly extruding and extending and dispersing by flow, and quantitatively grasping the degree of dispersion, wherein the inflow pressure loss when the material flows from the large passage to the small passage is reduced. A dispersion degree measurement test device which is variable and quantitatively grasps the degree of dispersion based on a relationship with the inflow pressure loss. 4. A passage body having a large passage having a large cross-sectional area and a slit-like passage having a cross-sectional area smaller than the large passage, and a viscous material containing an object to be dispersed is supplied from the large passage side. Extrusion means provided at the end of the large passage of the passage body for forcibly extruding and dispersing the material poured into the passage body from the slit-shaped passage side; and a temperature of the material poured into the passage body. Temperature control means provided around the passage body to adjust the pressure, at least one of the following values is variable, and the variable value is changed to change the degree of dispersion with the inflow pressure loss. Dispersion measurement test equipment that quantitatively grasps the relationship. Slit width of the slit passage Ratio of the cross-sectional area of the large passage and the slit passage Inflow angle from the large passage to the slit passage Extrusion pressure by the extrusion unit Material temperature by the temperature adjustment unit 5. The dispersity measuring test apparatus according to claim 4, further comprising a pressure gauge for measuring a pressure in the middle of the slit-shaped passage. 6. The dispersity measuring test apparatus according to claim 4, wherein the length of the slit-shaped passage is variable.