KR20110027945A - High shearing apparatus and high shearing method - Google Patents

Abstract

PURPOSE: A high shearing apparatus and a high shearing method are provided to enhance the precision of nano dispersion of polymer materials in high shearing and to improve the efficiency of plasticization and high shearing. CONSTITUTION: A high shearing apparatus comprises: a pre-heating unit for obtaining a plasticization materials by heating polymer materials; a high shear unit for imparting high shear tension while circulating the plasticization materials, in which an internal return type screw(23) is installed inside a heating container and enables high speed rotation; an injection unit capable of opening and closing in which the polymer materials are installed in a material injection unit; and a discharge unit in which high sheared polymer materials is discharged from the heating container.

Description

High shear device and high shear method {HIGH SHEARING APPARATUS AND HIGH SHEARING METHOD}

The present invention is a high-strength for dispersing and mixing the internal structure of a polymer material at a nano level by high shearing a polymer material such as, for example, an incompatible polymer blend system, a polymer / filler system, or a polymer blend / filler system material. The present invention relates to an apparatus and a high shear method.

Conventionally, a polymer blend extrudates having a dispersed phase of several tens of nanometers in size can be used in a stationary field by using a material of a non-incompatible (incompatible) blend system and adding an extra additive such as a compatibilizer. A high shear group is known for producing the resin (see, for example, Japanese Patent Laid-Open No. 2005-313608).

The high shear described in Japanese Patent Application Laid-Open No. 2005-313608 is equipped with an internal feedback high shear screw, and a high molecular screw of 2 to 5 g of the polymer blend trace sample is melted, for example, from 500 to 3000 m- ^{. The} polymer blend extrudates excellent in heat resistance, mechanical properties, dimensional stability, etc. are manufactured by rotating at high speed by ¹ rotation speed, kneading for several minutes, and nanodispersing.

Fig. 7 shows a schematic configuration of a high shear group described in Japanese Patent Laid-Open No. 2005-313608. In the high shear device 100 shown in FIG. 7, the high shear screw 102 having a tapered outer circumferential surface inserted into the heating cylinder 101 is rotated at a low speed of 120 to 240 m ⁻¹ , for example. Pellet sample 104 (polymer blend-based resin) is pushed into the rod or the like from the inlet 103 through the inlet hole 101a, and directly injected into the high shear screw 102 to be plasticized. Thereafter, the screw 102 is rotated at a higher speed from the above-described low speed rotation for plasticization, thereby performing high shear. Moreover, in the groove surface (the groove surface between the screw blades 102b) of the outer peripheral surface of the high shear screw 102, the discharge port 105 from the rear end side (proximal side) which adjoins the injection hole 101a of the pellet sample 104. The tapered surface 102a gradually enlarged toward the distal end side close to) is formed. By providing the tapered surface 102a, the solid pellet sample 104 supplied to the high shear screw 102 is compressed as it moves from the rear end side to the front end side of the screw, and plasticized and melted from the solid state. It becomes a state.

However, in the conventional high shear, there existed the following problems.

That is, the high shear device disclosed in Japanese Patent Laid-Open No. 2005-313608 is a function of the high shear screw 102 shown in Fig. 7, which functions to plasticize the resin of the solid polymer blend system by low speed rotation. And two functions of high shearing molten resin by high-speed rotation. That is, in order to compress, extinguish and melt the solid resin, it is necessary to provide a tapered surface 102a on the outer circumferential surface of the high shear screw and to form a so-called compression shape, but on the contrary, by providing a tapered surface 102a, The sheared resin is not subjected to a constant shear stress, and the high shear efficiency is lowered.

Moreover, in the method of plasticizing and high shear continuously by the same high shear screw as in the related art, it is difficult to set the optimum shape, configuration, conditions, etc. required for plasticization and high shear. As a result, nano-dispersion of resin becomes inadequate, defects in which transparency falls, such as the molded object compressed by the transparent polymer blend, respectively, becomes cloudy or dark brown, and it becomes impossible to manufacture a stable and favorable extrudate.

The present invention has been made in view of the above-described problems, and the internal structure can be dispersed and mixed at a nano level by improving the plasticization and efficiency of high shear and increasing the precision of nanodispersion of a polymer material during high shear. It is an object of the present invention to provide a high shear device and a high shear method.

A high shear device according to the present invention is a high shear device for dispersing and mixing a polymer material at a nano level by kneading while applying a high shear stress, and includes a preheater for heating a polymer material to obtain a plasticizing material, and a center. An internal feedback screw in which a feedback hole is communicated therein along the axis is provided in the material heating cylinder so as to be rotatable at high speed. In addition, the high shear device includes a high shear portion that imparts high shear stress while circulating the plasticizing material supplied from the preheating portion by rotating the internal feedback screw at high speed, and the polymer material heated from the preheating portion. And an openable and injectable means provided in the material injector for injecting the material into the material heater, and an openable and openable means in the material outlet for discharging the high shear polymer material from the material heater.

According to the high shear device according to the present invention, the polymer material is heated in a preheating part different from the high shear part to obtain a plasticizing material, and the plasticizing material is opened in the high shear part by opening the opening and closing injection means provided in the material injection part. The material is fed into a heating vessel. By rotating the internal return screw installed in the material heating vessel at high speed, the plasticizing material is subjected to high shear stress in the high shear region formed in the gap between the material heating vessel and the internal return screw, and is sent forward while turning at high speed to return internally. It is circulated at high speed by returning backward through the return hole inside the die screw. The plasticizing material is high sheared by repeatedly applying high shear stress, and its internal structure is dispersed and mixed at the nano level. After the end of the high shear, the material is discharged from the material heater by opening the discharge means provided with the high shear polymer material.

In addition, the injection means and the discharge means can be automatically opened and closed according to a preset time to control the injection amount and the discharge amount of the material, the efficiency of the high shear can be improved, and the discharge of the nano-dispersed material can be controlled. Efficiency can be aimed at.

Moreover, the material heating cylinder is provided with the 1st pressure sensor which detects the 1st pressure of the vicinity of the inflow port of the return hole of an internal return screw, and the 2nd pressure sensor which detects the 2nd pressure of the discharge port of the return hole. And control means for controlling rotation and stop of the internal feedback screw based on the first pressure and the second pressure.

By rotating the inner return screw at a high speed, the change in the material of the plasticizing material is effected by the first and second pressure sensors, so that the first pressure and the return hole in the vicinity of the inlet of the return hole of the inner return screw are changed. It detects as the 2nd pressure of the discharge port vicinity, and controls rotation and a stop of an internal feedback screw by a control means.

Specifically, the waveforms of the internal pressure return and the first pressure in the vicinity of the return hole inlet and the second pressure in the vicinity of the discharge port are similar to each other, and the waveforms become normal after forming a predetermined peak value. It is possible to impart a high shear stress with a constant flow to the material kneaded by the rotation of the internal feedback screw by indicating a change and controlling the first pressure and the second pressure to form a predetermined pressure difference over time. have. In addition, by constructing the high shear portion and the preheating portion with powder, it is possible to carry out heat plasticization and high shear of the polymer material separately, so that the high shear can be controlled under optimum conditions.

Moreover, the preheating part may be a plasticizing part for plasticizing and melting a solid polymer material.

In this invention, it can plasticize by melt | dissolving a solid polymeric material in a plasticization part, and this plasticized material can be made into the high shear target material in a high shear part.

In addition, a plasticizing screw is installed in the plasticizing heating tube in the plasticizing section, and the plasticizing screw is rotated at a lower speed than the high speed rotation of the internal feedback screw to melt the solid polymer material, and plasticize the molten polymer material. You may be provided with the structure supplied to the high shear part from the material injection | pouring part provided in the heating heating container.

In the present invention, the molten material can be obtained by plasticizing the polymer material by supplying a solid polymer material to the plasticizing screw, kneading by rotating at low speed at an appropriate temperature and rotational speed. Then, by supplying the plasticized molten resin to the high shear end by opening the injection means of the material injection portion, it is possible to supply the molten material of the desired property into the high shear end.

Moreover, it is preferable that the rotation speed of an internal feedback screw is 100-3300m <^-1> . By rotating the internal feedback screw at a high speed in this range, the supplied polymer material can be high sheared.

In addition, the inner circumferential surface of the material heating cylinder is formed into a substantially cylindrical shape, and a screw wing is formed in a spiral shape on a substantially cylindrical groove surface on the outer circumferential surface of the inner return screw, and the gap between the inner circumferential surface of the material heating portion and the groove surface of the inner return screw is It is preferable to be constant along the center axis direction.

For this reason, the inner circumferential surface of the material heating tube provided in the groove surface of the outer circumferential surface of the inner return screw as compared to the plasticizer combined screw having a compression shape (taper shape) formed in the groove surface between the screw blades on the outer circumferential surface of the inner return screw. The gap between the and axial directions becomes constant. Therefore, as in the case of the compression shape, the clearance gap between the screw outer peripheral side of the tip side does not become small, circulation of the material required for kneading becomes smooth, and high shear efficiency can be improved. In addition, the width of the screw shape can be increased and high shear can be performed, and the shear and movement of the polymer material can be performed at high speed by the screw blade.

Moreover, you may form a notch in the predetermined position corresponding to the base end side of an internal feedback screw of a material heating cylinder.

In this case, the material which escaped from the rear end of the internal feedback screw in the high shear can be discharged downward from the cutout. Therefore, the defect by the inflow of material into the bearing etc. which are provided in the rear side can be eliminated, and the stable continuous operation of a high shear part can be performed.

Moreover, you may provide the heating taper surface which an inner diameter becomes large gradually from the front end side to the base end side in the inner surface of the base end side of a material heating cylinder.

In this case, the material which escaped from the rear end of the internal feedback screw in the high shear can be led to the rear end side of the material heating tube, and can be discharged downward from the rear end thereof. Therefore, the defect by which a material flows in the bearing etc. which are provided in the back side of an internal feedback screw can be eliminated.

Moreover, you may provide a cooling flow path in the predetermined position of the base end side of a material heating cylinder.

In this case, the material which escapes from the base end of the internal feedback screw during the high shear is cooled and solidified, and the material is in a state where it is likely to adhere to the circumferential surface of the shaft connected to the rotary shaft of the internal feedback screw, for example. Therefore, the material does not fall off and flows out in the middle of the shaft, and can be removed by moving to a suitable location behind the shaft.

In addition, a shaft for coaxially connecting each rotation axis of the drive motor for driving the inner return screw and the inner return screw is provided at the high end, and a reverse thread shape is formed on the outer peripheral surface of the tip near the inner return screw of the shaft. You may form a screw groove part.

In this case, in addition to the rotation of the shaft, the material escaped from the rear end of the inner return screw during the high shear is guided to the screw groove portion and sent to the rear of the shaft, and the leaked material can be discharged more efficiently.

Moreover, the shaft is rotatably supported by the anti-vibration support part in the axial middle part, and the shaft taper surface which gradually increases internal diameter is formed from the anti-vibration support part to the internal feedback screw side toward the drive motor side. You may also

In this case, the material coming out of the proximal end of the internal feedback screw during the high shear moves to the rear side along the shaft while being cooled and solidified, and then splits automatically by moving toward the diameter of the shaft taper surface. The material can be dropped and removed.

The high shear method according to the present invention is a high shear method for dispersing and mixing a polymer material at a nano level by kneading while applying a high shear stress, the process of heating and plasticizing the polymer material, and the plasticized polymer material inside A step of opening and supplying an injection means provided in the material injection unit in a material heating cylinder for rotatably accommodating the feedback screw, and rotating the internal feedback screw in the material heating cylinder at a speed of 100 to 3300 m ^-1 . Rotating the polymer material in and out of the internal feedback screw by rotating it to give high shear stress and high shear, and to install the polymer material in which the internal structure is dispersed and mixed at nano level by the high shear. And a step of opening and discharging the discharging means.

According to the high shear method according to the present invention, after heating and plasticizing the polymer material, the polymer material is supplied into the material heating tube by opening the injection means, and the internal feedback screw provided in the material heating cylinder is rotated at high speed, The polymer material is circulated between the high shear region, which is the gap between the material heating tube and the internal feedback screw, and the return hole inside the internal feedback screw, thereby providing high shear stress and high shear, and the polymer material has a nano level internal structure. The polymer material is dispersed and mixed in the furnace and discharged by opening the discharge means.

According to the high shear device and the high shear method according to the present invention, by heating the heat-plasticized material in the preheating part, and by rotating the internal feedback screw at high speed based on the material pressure at the time of high shear, High shear can be performed, and high shear which can nano-disperse highly and efficiently with respect to a polymeric material can be performed. Therefore, in the high shear, regardless of the preheating portion of the material, the internal structure of the polymer material can be continuously dispersed and mixed at the nano level under optimum conditions, and the high shear precision is high and efficient.

EMBODIMENT OF THE INVENTION Hereinafter, the high shear device and the high shear method which concern on embodiment of this invention are demonstrated based on FIG.

In the high shear device 1 according to the embodiment of the present invention shown in FIG. 1, the internal structure of the resin is dispersed to a nano level by kneading while applying a high shear stress to a polymer blend-based resin that is a polymer material in a molten state. By mixing.

This high shear device 1 is a plasticizing unit 10 (plasticizing unit) for plasticizing and melting a resin of a solid polymer blend system (hereinafter referred to as &quot; solid resin &quot;) forming a pellet shape, for example. And a high shear unit 20 (high shear) for injecting molten resin plasticized by the plasticizing unit 10 from the injection portion 22 to nanodisperse the molten resin. .

Examples of the polymer material to be used in the shearing device 1 include blend materials such as incompatible polymer blend systems, polymer / filler systems, and polymer blend / filler resin materials. Examples of the incompatible polymer blend system include a combination of polyvinylidene fluoride (PVDF) and polyamide (11) (PA11), or a combination of polycarbonate (PC) and polymethyl methacrylate (PMMA). Examples of the polymer / filler system include a combination of polylactic acid and carbon nanotubes (CNT), and examples of the polymer blend / filler system include a combination of PVDF, polyamide 6, and CNT.

In the present invention, the present invention is not limited to the polymer blend material, and other blend materials, a single molecular material that does not blend, and the like can be sheared and nanodispersed.

In FIG. 1, the plasticizing unit 10 arrange | positions the rotation axis direction of the plasticizing screw 12 (after-mentioned) for kneading and plasticizing-melting solid resin which injected | thrown-in is toward a substantially horizontal direction. The high shear unit 20 orthogonally intersects the rotation axis direction of the internal feedback screw 23 (to be described later) for high shearing the molten resin injected from the plasticization unit 10 in the rotation axis direction of the plasticization screw 12. Are arranged in a substantially horizontal direction. And the plasticization unit 10 is set as the structure which can remove the injection nozzle 15 with respect to the injection part 22 of the high shear unit 20. As shown in FIG.

Here, the high shearing apparatus 1 shown in FIG. 1 has shown the cross section in the plasticization screw 12 part, and has shown the state seen from the side surface in the hopper 14 and hopper stand 17 mentioned later.

In addition, in the following description, the front of the screw conveyance direction in the axial direction of the plasticizing screw 12 and the internal feedback screw 23 in the plasticizing unit 10 and the high shear unit 20 is " It is set as "front", "front end", and "tip", and the opposite side is used unified as "rear", "back end", and "base". Moreover, also in the heating cylinder 11 of the plasticizing unit 10 mentioned later, and the heating cylinder 21 of the high shear unit 20 similarly, the conveyance direction front of the screws 12 and 23 which pass through each is " It is set as "front", "front end", and "tip", and the opposite side is used unified as "rear", "back end", and "base".

In the plasticizing unit 10 shown in FIG. 1, the substantially rod-shaped plasticization screw 12 is inserted in the substantially hollow cylindrical heating cylinder 11 (plasticization heating cylinder) provided in the substantially horizontal direction. . The plasticizing screw 12 is arranged substantially coaxially with the heating cylinder 11, and is made to be rotatable about the central axis in the heating cylinder 11, and reciprocating in the axial direction. On the side of the proximal end portion 12a that forms one end of the plasticizing screw 12 in the axial direction, a driving portion 13 for causing the plasticizing screw 12 to rotate and reciprocate in the axial direction is connected.

Hopper 14 which supplies a solid resin is provided in the base end part 12a of the plasticization screw 12 in the heating cylinder 11, and the front-end part 12b which forms the axial other end side of the plasticization screw 12 is provided. The injection nozzle 15 (injection part) is attached to the side.

The outer circumferential surface of the heating cylinder 11 of the plasticizing unit 10 is covered with a plurality of heaters 16, 16... The temperature sensor 18 is inserted in the thickness part of the heating cylinder 11 (refer FIG. A). By controlling the temperature of the heater 16 based on the temperature in the heating cylinder 11 which is measured at any time by the temperature sensor 18, the heating cylinder 11 can be temperature-controlled, and this causes the inside of the heating cylinder 11 to In addition to melting the solid resin, the temperature of the molten resin kneaded in the plasticizing screw 12 can be controlled.

In the base end portion 11a of the heating cylinder 11, an insertion tube and hole for supporting the hopper 14 and dropping the solid resin supplied to the hopper 14 on the base end portion 12a side of the plasticizing screw 12. The hopper stand 17 which has 17a is being fixed.

Moreover, the injection nozzle 15 provided in the inner surface of the front-end | tip part 11b of the heating cylinder 11 let the flow path (injection opening 15a) pass the plasticization screw 12 of the heating cylinder 11 through. It adheres in the state which communicated with the internal hole part (plasticization area | region R). In addition, the plasticization area | region R is a space between the heating cylinder 11 and the plasticization screw 12, and is the area | region sent forward while the solid resin supplied from the hopper 14 melt | dissolves.

Moreover, the base end part 12a of the plasticization screw 12 reaches | attains the insertion hole and the hole 17a of the hopper stand 17, and is connected so that it may become linear with the screw rotation shaft 133 of the drive part 13. As shown in FIG.

The drive part 13 rotates 13 A of rotation mechanisms which rotate the plasticization screw 12, and the plasticization screw 12 reciprocally moves in the axial direction, and the molten resin in the screw 12 is moved from the injection nozzle 15. The injection mechanism 13B for injecting is provided.

13 A of rotation mechanisms are equipped with the 1st drive motor 132 fixed on the fixed part 131, and the screw rotation shaft 133 to which the rotational force of the drive motor 132 is transmitted. The screw rotation shaft 133 and the base end portion 12a of the plasticizing screw 12 are connected in a straight line by the connecting member 134.

The injection mechanism 13B is a ball screw 135 fixed to the fixing portion 31 by arranging a screw shaft in the axial direction of the plasticizing screw 12 and a screw rotatably with respect to the ball screw 135. It is provided with a nut 136 coupled to the formula, and a second drive motor 137 disposed separately from the fixed portion 131 while transmitting a rotational force to the nut 136.

By rotating the nut 136 by the rotational drive of the second drive motor 137, the ball screw 135 screwed to the nut 136 reciprocates. For this reason, the screw rotating shaft 133 by the reciprocating movement of the fixing | fixed part 131 which fixes and supports the ball screw 135 integrally with the 1st drive motor 132 and the screw rotating shaft 133 on the fixed part 131 is carried out. The plasticizing screw 12 connected to) reciprocates in the heating vessel 11 in its axial direction. That is, the plasticization screw 12 has a function of injecting the molten resin plasticized in the heating cylinder 11 from the injection nozzle 15 by rotation and reciprocating movement.

Next, the high shear unit 20 will be described based on FIGS. 2 and 3. The high shear unit 20 has a substantially hollow cylindrical heating cylinder 21 (corresponding to the material heating cylinder of the present invention) having an injection portion 22 of molten resin and arranged in a substantially horizontal direction, and An approximately cylindrical inner return screw 23 rotatable about a central axis in a state of being inserted into the heating cylinder 21 and a shaft 25 connected to the proximal end 23b side of the inner return screw 23. And a drive motor 24 for rotating the inner return screw 23 through the shaft 25, an anti-vibration support 27 for rotatably supporting the shaft 25 through the bearing 26, and The tip holding part 28 which has the T-shaped pedestal 29 which forms the shaping | molding process part provided in the front end side of the internal feedback screw 23 is provided. In addition, the heating cylinder 21 and the internal feedback screw 23 are formed coaxially.

In FIG. 2, the heating cylinder 21 of the high shear unit 20 is maintained in a state in which the longitudinal direction is substantially in the horizontal direction, and the outer circumferential surface is covered by the heater 38. By controlling the temperature of the heater 38, the heating cylinder 21 can be adjusted in temperature. The base end portion 21b (left side in FIG. 3) of the heating cylinder 21 is supported by the main body support portion 30, and the tip holding portion 28 is connected to the tip portion 21a.

Moreover, the injection part 22 provided in the heating cylinder 21 is provided with the injection hole 22a which communicates with the internal hole part which rotatably receives the internal return screw 23, ie, the high shear area | region K, The injection port 15a of the injection nozzle 15 described above is engaged with and communicated with the outer circumferential side opening portion of the injection path 22a. The high shear region K is a substantially cylindrical gap between the heating cylinder 21 and the internal feedback screw 23.

For this reason, the molten resin injected from the injection nozzle 15 of the plasticization unit 10 can flow into the high shear region K in the heating cylinder 21 through the injection path 22a of the injection part 22. have.

Here, in FIG. 4, the position of the injection path 22a formed in the injection part 22 is the discharge port 231b of the return hole 231 provided near the rear end of the internal feedback screw 23 (it mentions later). The tip side).

Then, in the middle of the injection passage 22a of the injection portion 22, an injection valve 31 capable of opening and closing control for adjusting the flow rate of the molten resin from the plasticizing unit 10 in the inner cavity of the heating cylinder 21. Is provided as an injection means. The injection valve 31 becomes an automatic opening / closing type which can control the injection amount of the molten resin according to a predetermined time or the like, and is linked to the opening / closing operation of the discharge valve 32 described later in this embodiment.

The internal feedback screw 23 is rotatably installed in the heating cylinder 21 in a state of being substantially coaxially inserted, and the proximal end 23b is coaxial with the shaft 25 connected to the rotation shaft of the drive motor 24. It is connected so that the rotational force of the drive motor 24 is transmitted. The internal feedback screw 23 can be subjected to high shear while kneading the molten resin by rotating the motor at a high speed, for example, at a speed of 100 to 3300 m ⁻¹ by the drive motor 24.

The internal feedback screw 23 is formed in a substantially circumferential improvement, and the screw blades 23c protrude in a spiral shape on the outer peripheral surface thereof. The internal feedback screw 23 rotates at high speed, thereby conveying the molten resin of the high shear region K forward while shearing at high speed.

Inside the inner return screw 23, a return hole 231 is drilled along the center axis line which is the rotation center thereof, and an inlet 231a of the return hole 231 is opened in the distal end portion 23a, and the molten resin The discharge port 231b of the feedback hole 231 is opened in the outer circumferential surface of the inner return screw 23 on the rear side of the injection path 22a. The return hole 231 extends rearward from the inlet port 231a to the center axis line of the inner return screw 23 and smoothly curves at a position near the outlet port 231a to move away from the center axis line to the outer circumferential surface toward the outer circumferential surface. It extends and has a flow path communicating with the discharge port 231a.

For this reason, the return hole 231 communicates with the high shear region K at the inflow port 231a and the discharge port 231b.

In this return hole 231, the inflow port 231a becomes the upstream side of the molten resin which flows in the return hole 231 during high shear, and the discharge port 231b becomes the downstream side. That is, the molten resin injected into the high shear region K is sent to the tip side along the groove face 23d along with the rotation of the internal feedback screw 23, so that the tip 23a and the tip holding part 28 In the gap S2, a circulation is introduced into the return hole 231 from the inlet port 231a, flows backward, discharged from the discharge port 231b, and sent to the front end side with the rotation of the inner return screw 23 again.

Moreover, as shown in FIG. 4, the internal feedback screw 23 is comprised by the groove surface 23d between the screw blades 23c parallel to the center axis of a screw. That is, the gap between the inner surface 21c of the heating cylinder 21 and the groove surface 23c of the outer circumferential surface of the inner return screw 23 is at a constant interval S1 over the rotation axis direction. The high shear region K is formed of the gap S1 and the gap S2.

Therefore, the screw outer peripheral side of the front end side is similar to the internal feedback screw for plasticization combined use in the prior art in which the compression shape (taper shape) was formed in the groove surface 23d in the outer peripheral surface of the inner return screw 23. The gap is not small. Therefore, circulation of the molten resin required for kneading becomes smooth, and high shear efficiency can be improved.

In addition, since the degree of freedom is increased in the design of the screw shape, high shear can be performed, and an inner return screw 23 having an appropriate shape can be used in accordance with the conditions such as the material of the molten resin, the processing ability, and the like.

In FIG. 4, the base end part 23b of the internal feedback screw 23 is provided in the position outside the range of the high shear area | region K in which the screw blade 23c is not formed, and is the same as the screw blade 23c. It is a cylindrical region formed with an outer diameter. This base end 23b can slide liquid-tightly with respect to the inner surface 21c of the heating cylinder 21. As shown in FIG.

In addition, as shown in FIG. 2, in the thickness part of the heating cylinder 21, as the resin pressure sensor 33 (pressure sensor), the number of each of the whole part and the rear part in the axial direction of the internal feedback screw 23 is axial. All the resin pressure sensors 33A and the rear resin pressure sensors 33B for detecting the acupressure are embedded. Therefore, all the detection part of 33 A of resin pressure sensors and the rear resin pressure sensor 33B is arrange | positioned so that the high shear area | region K in the heating cylinder 21 may be exposed.

All of the resin pressure sensors 33A are disposed at positions where the resin pressure (first pressure) in the vicinity of the distal end 23a (near the inlet 231a) of the internal feedback screw 23 can be detected, and the rear resin pressure sensor 33B. ) Is disposed at a position where the resin pressure (second pressure) near the discharge port 231b of the return hole 231 can be detected. The total resin pressure and the rear resin pressure detected by the two resin pressure sensors 33A and 33B are managed after high shearing, but details will be described later.

In addition, the high shearing unit 20 has a material injection amount, a material temperature, and the like according to the total resin pressure P1 and the rear resin pressure P2 detected by the resin pressure sensor 33A and the rear resin pressure sensor 33B. Control means 2 for controlling at least one of the kneading time and the screw rotation speed is provided.

In the high shear, the control means 2 shows the waveforms of the total resin pressure and the rear resin pressure over time, which are similar to each other, and exhibit a change to a steady state after forming a predetermined peak value. As time passes, the total resin pressure and the rear resin pressure are controlled to form a predetermined pressure difference.

Moreover, this high shear device 1 has the structure which isolate | separated the plasticization unit 10 and the high shear unit 20. As shown in FIG. Therefore, the high shearing machine equipped with the internal feedback screw does not need to have the function of heating, plasticizing, or melting the resin, so that the optimum control for the high shear conditions can be achieved. It is.

3, the discharge path 29a which communicates with the front-end | tip holding part 28 connected to the heating cylinder 21 through the clearance gap S2 of the high shear area | region K of the heating cylinder 21 is connected. Formed. On the discharge side of the discharge path 29a in the tip holder 28, a T-shaped pedestal 29 is formed to form a molded part in which the opening cross section is enlarged in the downward direction. The tip holding part 28 also becomes temperature adjustable by the heater 38 (refer FIG. 2).

And in the middle of the discharge path 29a, the discharge valve 32 for adjusting the discharge amount of the nano dispersion resin discharged | emitted from the high shear area | region K is provided as discharge means. This discharge valve 32 becomes an automatic opening / closing type which can control the discharge amount according to a predetermined high shear kneading time or the like, and is linked to the opening / closing operation of the injection valve 31 described above.

That is, the above-described injection valve 31 and discharge valve 32 have a configuration capable of controlling the injection of molten resin and the discharge of the high shear molten resin at an arbitrary timing in accordance with an output signal from the control means 2. It is. For this reason, high shear kneading time, discharge time, and injection time can be set arbitrarily.

In addition, as shown in FIG. 2, the temperature sensor 34 (34A, 34B, 34C, 34D) is provided in the heating cylinder 21 and the front end holding | maintenance part 28 at a suitable position, and the heating cylinder at high shear ( 21 and the temperature of the tip holding | maintenance part 28 are input to the control means 2, and are managed, and the temperature can be adjusted with the heater 38. FIG.

3, the cooling flow paths 35, 36, 37 are embedded in the heating cylinder 21, the main body holding part 30, and the anti-vibration support part 27, respectively. The 1st cooling flow path 35 of the heating cylinder 21 adjusts the temperature of the heating cylinder 21. The second cooling flow path 36 (corresponding to the cooling flow path of the present invention) of the main body holding part 30 has an outer region corresponding to the base end 23b of the inner return screw 23 of the heating cylinder 21. It is installed for cooling.

Moreover, the 3rd cooling flow path 37 of the anti-vibration support part 27 cools the shaft 25 by the anti-vibration support part 27, and the heat | fever and drive which are transmitted from the heating cylinder 21 through the shaft 25 are carried out. It is for protecting the bearing 26 from heat transmitted from the motor 24.

Next, the structure which prevents inflow of molten resin into the drive motor 24 and the bearing 26 with which the high shearing unit 20 is equipped is demonstrated based on drawing.

As shown in FIG. 3, in the heating cylinder 21 of the high shear unit 20, at a predetermined position corresponding to the base end 23b of the internal feedback screw 23, the heating cylinder 21 is approximately in the circumferential direction. The slit 211 (cutout part) is provided in the lower side. For this reason, the resin which escaped from the base end 23b of the internal feedback screw 23 and the fitting part of the heating cylinder 21 in the high shear is not slit along the shaft 25 to the drive motor 24 side. It can fall down from 211.

Moreover, the inner surface of the base end part 21b of the heating cylinder 21 is provided with the heating cylinder taper surface 212 which becomes larger internally as it goes back from the front. For this reason, even if the molten resin leaked from the high shear region K mentioned above leaks to the rear end side further along the shaft 25 without being discharged | emitted from the slit 211 mentioned above, this molten resin is made to carry out the shaft 25 It separates from and guides backward along the taper surface 212, and it is the structure which can be discharged | emitted downward from the rear end.

As described above, by providing the slit 211 and the heating cylinder tapered surface 212, for example, the drive motor 24 and the vibration provided on the proximal end 23b side (rear side) of the internal feedback screw 23. Molten resin can be prevented from flowing into the bearing 26 of the preventive support part 27, and stable continuous operation can be performed in the high shear unit 20.

On the outer circumferential surface of the front end side (internal feedback screw 23 side) of the shaft 25, a screw groove portion 251 having a reverse thread shape is formed. Due to this, together with the rotation of the shaft 25, the molten resin, which is not completely discharged from the slit 211 described above, is guided to the screw groove 251 to be sent to the rear, and the leaked resin can be discharged more efficiently. It is a structure that there is.

Moreover, the shaft taper surface 252 which becomes large diameter as it goes from front to back is formed in the position of the internal feedback screw 23 side with respect to the anti-vibration support part 27 of the shaft 25. As shown in FIG. The shaft formed in the front side from the anti-vibration support part 27 even if the molten resin which escaped from the base end part 23b of the internal feedback screw 23 during the high shear moved backward along the shaft 25 while cooling and solidifying. By reaching the tapered surface 252, the molten resin solidified is automatically broken by flowing in the direction in which the tapered surface is enlarged. For this reason, since resin can fall naturally in the shaft taper surface 252, defects, such as resin which flows into the bearing 26 provided in the anti-vibration support part 27, can be prevented.

Moreover, the 2nd cooling flow path 36 is provided in the main body support part 30, and it has a structure which cools the base end part 21b of the heating cylinder 21 hold | maintained at the inner peripheral side. Therefore, the molten resin which escaped from the rear end of the internal feedback screw 23 in the high shear is cooled and solidified, and the molten resin is likely to adhere to the circumferential surface of the shaft 25 described above. Therefore, it is suppressed that it falls in the middle of the shaft 25 and flows out, and it can move to the rear along the shaft 25 efficiently. In addition, the molten resin can be reliably spontaneously dropped by splitting at the shaft taper surface 252.

The high shear device 1 according to the present embodiment has the above configuration. Next, the high shear method with respect to resin of the polymer blend system which is a high molecular material is demonstrated according to the flowchart shown in FIG. As the polymer blend resin, for example, an incompatible polymer blend system, a polymer / filler system, a polymer blend / filler solid resin material, or the like may be used. However, other polymer materials may be used.

In the high shear apparatus 1 shown in FIG. 1, as a kind of polymer blend type solid resin, resin which mixed 2 or more types of resins mentioned above can be used. In the heating cylinder 11, the plasticizing screw 12 is rotated at an appropriate rotational speed by driving the 1st drive motor 132 of the rotating mechanism 13A. The heating cylinder 11 is made into the state heated previously at a suitable temperature by the heater 16 attached to the outer periphery.

Under such a state, for example, a required amount of solid resin such as pellets is introduced into the heating tube 11 from the hopper 14 of the plasticizing unit 10 (step S1). While rotating the plasticizing screw 12 in the plasticizing region R in the heating tube 11, the solid resin is heated in the heater 16 for a predetermined time to plasticize it (step S2). For this reason, by plasticizing and kneading the resin in the plasticization region R, it becomes molten resin, and plasticization of resin in the plasticization region R of the plasticization unit 10 is completed (step S3).

Next, the molten resin in the plasticization unit 10 is injected into the heating cylinder 21 of the high shear unit 20 (steps S4 to S7).

Specifically, the injection valve 31 and the discharge valve 32 of the high shear unit 20 are opened by the output signal from the control means 2 at the timing when step S3 in which the molten resin of the desired property is obtained is completed. The injection path 22a and the discharge path 29a of the high shear unit 20 are opened (step S4).

In this state, by driving the second drive motor 137, the ball screw 135 is moved forward integrally with the fixing part 131 through the nut 136. Then, the screw rotation shaft 133 on the fixing part 131 moves forward integrally so that the plasticizing screw 12 moves forward in the axial direction in the heating cylinder 11. For this reason, the plasticization screw 12 injects the molten resin plasticized in the heating cylinder 11 into the heating cylinder 21 of the high shear unit 20 from the injection nozzle 15.

In the high shear unit 20, the internal feedback screw 23 in the heating cylinder 21 is rotated at a low speed rotation of, for example, 300 m ⁻¹ or less (step S5). At this time, since the high shear region K in the heating cylinder 21 of the high shear unit 20 before the injection is empty, the molten resin is injected into the air from the discharge path 29a by injecting the molten resin. It discharges, and the inside of the heating cylinder 21 of the high shear unit 20 is gradually filled with molten resin (step S6).

When the injection completion of the molten resin is detected (step 7), the injection valve 31 and the discharge valve 32 are closed by the control means 2 to close the respective flow passages 22a and 29a. In addition, the injection completion judgment timing is the pressure value of all the resin pressure P1 and rear resin pressure P2 detected by the resin pressure sensors 33A and 33B provided in the front-back part of the internal feedback screw 23. You can judge by. The injection completion is detected by generating a predetermined pressure P2 almost equal to the resin pressure P1 in the vicinity of the return hole discharge port of the internal feedback screw 23.

In the step of closing the injection valve 31 and the discharge valve 32 (step S8), the high shear unit 20 performs a high shear (step S9). In the plasticization unit 10, a process in which new solid resin is supplied and plasticization is performed in parallel with the high shear in the high shear unit 20 is repeated in steps 1 to 3.

In the high shear unit 20, the internal feedback screw 23 in the heating cylinder 21 is rotated at high speed. The high speed rotation speed is determined by the resin material introduced. In the present embodiment, the molten resin is nano-dispersed by rotating at a high speed, for example, 100 to 3300 rpm, which is higher than the above-described low speed rotation, and performing high shear for a predetermined set time with respect to the molten resin in the high shear region K. , Nano dispersion resin is formed.

At this time, the molten resin injected into the high shear region K, as shown in FIG. 4, has a high-speed rotation of the screw 23 on the outer circumferential surface side of the internal precious screw 23, and mainly the groove face 23d on the outer circumferential surface. Is sent to the tip of the ship. Then, at the distal end portion 23a of the inner return screw 23, the inner flow of the return hole 231 flows backward from the inlet 231a from the gap S2, and the inner return screw 23 is discharged from the discharge port 231b by centrifugal force. The circulating flow which flows out to the outer peripheral surface of and returns to the groove surface 23d and is sent to the front end side is repeated at a high speed for a predetermined time.

For this reason, molten resin is kneaded and high shear stress is given. By this circulation, the molten resin is nano dispersed, and the internal structure is dispersed and mixed at the nano level.

Next, when the set high shear processing time is reached (step S10), the rotational speed of the internal feedback screw 23 is switched from high speed rotation to medium speed rotation (step S11). The medium speed rotation is a rotational speed area larger than the low speed rotation mentioned above and smaller than the high speed rotation, for example, 200-1000 m ^-1 . Then, the injection valve 31 and the discharge valve 32 are opened to open the injection passage 22a and the discharge passage 29a (step S12). As a result, the nano-dispersion resin in the high shear region K processed by the high shear is discharged from the discharging path 29a on the tip side with the rotation of the internal feedback screw 23 (step 13), and the T-shaped pedestal The molten resin discharged from (29) can be obtained as a polymer blend extrudates.

When the discharge time set in advance (step S14) is reached and all the nano-dispersion resins produced in the heating cylinder 21 of the high shear unit 20 are discharged, the flow returns to step S5 again. Here, in parallel with the high speed rotation of the internal feedback screw 23, a new solid resin is introduced into the plasticizing unit 10, the resin is melted, and the manufacturing process is completed (steps S1 to S3).

Therefore, the molten resin is injected from the injection nozzle 15 from the plasticizing unit 10 while rotating the internal feedback screw 23 of the high shear unit 20 from the medium speed rotation to the low speed rotation (step 5). (Step S6).

In this manner, by repeating the same steps, the solid resin can be sequentially sheared to disperse and mix the internal structure at the nano level.

Next, the high shear method using this high shear device 1 will be described in more detail based on the timing chart shown in FIG. 6.

In FIG.6 (a), (b), (c), the horizontal axis has shown the high shear time. Regarding the vertical axis, the resin pressure (MPa) is shown in FIG. 6A, and the rotation speed m ⁻¹ of the internal feedback screw 23 is shown in FIG. 6B, and FIG. 6C is shown. In the figure, the opening and closing states of the injection valve 31 and the discharge valve 32 of the molten resin are shown. 6 shows a high shear treatment step of 2 degrees.

As shown to (a)-(c) in FIG. 6, in the high shear mode, the injection valve 31 and the discharge valve 32 are closed by the control means 2, and the internal feedback screw 23 is carried out. the rotation speed, for example 300 ~ 3300m ^-1 ((b in FIG. 6) in 2500m ^-1) is rotated at a high rotation mode, the side of the outer circumferential surface of the inner feedback type screw 23, the molten resin, with the rotation of the front end of the It is sent to the side, and the molten resin flows in the return hole 231 from the inlet port 231a provided on the central axis of the inner return screw 23 at the screw tip 23a and flows backward. The molten resin is discharged from the discharge port 231b to the outer circumferential side of the inner return screw 23 by centrifugal force and returned, and the circulation flow is repeatedly sent to the tip side. For this reason, a large shear rate (for example, at most 4.4 × 10 ³ s ⁻¹ ) occurs, and the molten resin is kneaded at high speed to nanodispersion.

That is, as the high shear method, when the internal feedback screw 23 rotates at a high speed by the start of the high shear, all of the resin pressures P1 detected by the resin pressure sensor 33A and the rear resin pressure sensor 33B, and The rear resin pressure P2 represents a change in the steady state after forming a predetermined peak value, while the waveforms over time show similarities with each other, and the total resin pressure P1 and the rear resin pressure over time. P2 changes to form a predetermined pressure difference DELTA P (= P1-P2).

That is, at the beginning of high shear start, since the viscosity of molten resin with respect to the high speed rotation of the internal feedback screw 23 is high, resin resistance is high and resin pressure P1, P2 rises rapidly. As the high shear by the internal feedback screw 23 progresses, the shearing of the resin proceeds and the resin resistance gradually decreases. Therefore, the total resin pressure P1 and the rear resin pressure P2 gradually decrease, and the waveforms of the total resin pressure P1 and the waveform of the rear resin pressure P2 are controlled to be substantially parallel to each other. Moreover, it is more preferable that the pressure difference (DELTA) P (= P1-P2) is 3 Mpa or more. In addition, the value of the pressure difference (DELTA) P which should be converged is calculated | required beforehand by experiment.

At the time of high shear, the molten resin which circulates is cooled by the cooling water flowing in the cooling flow path 35 in the heating cylinder 21.

In addition, in this embodiment, as shown in FIG. 6, it controls by setting the screw rotation speed of the internal feedback screw 23 to 2500m <^-1> .

By managing the total resin pressure P1 and the rear resin pressure P2 in the high shear region K as described above, a high flow having a constant flow to the resin kneaded by the rotation of the internal feedback screw 23. However, stress can be imparted. Therefore, nanodispersion can be uniformly spread over the high-resistance resin.

By dispersing and blending the polymer blend resin material at a nano-level to the extent that the molecular size has been conventionally performed by high shear, which is not obtained at low and medium speed rotations, it is possible to manufacture a favorable material having unprecedented property properties. . For example, a good material having high transparency can be produced by dispersing and mixing the internal structures of the incompatible polymer blend system, the polymer / filler system, and the polymer blend / filler material at a nano level.

As described above, according to the high shear device 1 and the high shear method according to the present embodiment, the molten resin of the optimum temperature supplied from the plasticizing unit 10 in the high shear unit 20 is high. By controlling the resin pressure by high-speed rotation at a time, it is possible to perform high shear that can efficiently nano-disperse the molten resin with high accuracy, so that the internal structure of the polymer resin material is continuously at the nano level in a stable and good state. It can disperse and mix. Therefore, conventionally fine materials such as fine particles having properties and physical properties that are not obtained at the front end due to low speed rotation can be produced.

(Example)

Examples of the high shear device and the high shear method according to the present embodiment will be described below.

In the embodiment, using the high shear device 1 shown in Fig. 1, using a resin material obtained by mixing polycarbonate (PC) and acrylic (PMMA) in a ratio of 8: 2, as a polymer blend-based resin, Nanodispersion made the polymer blend extrudates.

First, in the plasticizing unit 10, the temperature of the heating tube 11 is set to 220 ° C, and the resin material is plasticized and melted by rotating the plasticizing screw 12 at a low speed of 300 m ^-1 or less to uniformly. Kneaded molten resin was prepared.

And the molten resin obtained was inject | poured into the heating cylinder 21 of the high shearing unit 20, and high internal rotation was performed by rotating the internal feedback screw 23 at high speed. The internal feedback screw 23 has a screw diameter of 28 mm, a screw pitch of 11 mm, a width of a flight (screw mount) of 2 mm, a diameter of 2.5 mm of the return hole 231, and a screw effective length (from the discharge port of the return hole from the screw tip). Distance to center) 50 mm.

Melt under the condition of screw rotation speed 2500m ^-1 of internal feedback screw 23, high shear time 30 seconds, cooling temperature 220 ℃ of heating tube 21, temperature 230 ℃ of heater 38 of heating tube 21 High shear of the resin was performed to obtain a nano dispersion resin.

In addition, the injection amount of the molten resin into the heating cylinder 21 of the high shear unit 20 causes the pressure P2 to be generated in the vicinity of the discharge port 231b in the return hole 231 of the internal return screw 23. It was set as the filling amount inside the heating cylinder 21 at the time of confirming.

And all the resin pressure P1 and the rear resin pressure P2 in the heating cylinder 21 in the high shear unit 20 at this time are made by the resin pressure sensor 33A and the rear resin pressure sensor 33B. While detecting and confirming the waveform of the resin pressure, the properties (transparency) of the manufactured polymer blend extrudates were determined.

Since the resin pressures P1 and P2 at the time of high shear by this embodiment are forcibly sent forward by the internal feedback screw 23, as shown in FIG. P1) was larger than rear resin pressure P2. Further, the total resin pressure P1 and the rear resin pressure P2 each reach a peak value (22 MPa at the front resin pressure P1) immediately after the start of the high shear, and then a smooth curve is added by the addition of the high shear stress. The characteristic of decreasing with the waveform is obtained. Further, the pressure difference ΔP (front resin pressure P1-rear resin pressure P2) between the total resin pressure P1 and the rear resin pressure P2 becomes almost constant (9 MPa) after the peak value, It was confirmed that it was 3 MPa or more.

As a result, it was visually confirmed that a good polymer blend extrudates having high transparency throughout were produced.

Originally, both PC and PMMA are transparent resins, but are opaque in blends in which the properties of the resin pressures (P1, P2) are not obtained, and transparent samples are obtained for the blends in which the properties of the resin pressures (P1, P2) are obtained. have. Transparency means the size is much smaller than the wavelength of 400-700 nm which is visible wavelength range. That is, in the transparent blend sample, it becomes evidence that they are mixing at the nano level.

As mentioned above, although the embodiment of the high shear device 1 and the high shear method which concerns on this embodiment was demonstrated, this invention is not limited to embodiment mentioned above, A change is made suitably in the range which does not deviate from the meaning. It is possible.

For example, in this embodiment, although the plasticizing unit 10 (plasticizing part) provided with the plasticizing screw 11 is employ | adopted, it is not limited to this, The material supplied to a high shear part is rubber | gum, etc. In this case, instead of the plasticizing part, the preheating part may be a heating object which does not include the plasticizing screw. Essentially, what is necessary is just to be able to make a material melt in a preheating part by heating. And as a material heated by this preheating part, although solid resin is used in this embodiment, the material which consists of powder, a fluid, and particle | grains may be sufficient as the property. Examples of the material system to be used include incompatible polymer blend systems, polymer / filler systems, and polymer blend / filler materials.

In addition, in this embodiment, the plasticization unit 10 is detachable with respect to the high shearing unit 20, and by injecting molten resin using this plasticization unit 10, the molten resin is injected into a high shearing unit ( Although injected into the heating cylinder 21 (high shear area | region K) of 20, it is not limited to this form.

That is, other means for supplying only the molten resin from the injection path 22a to the high shear region K of the high shear unit 20 while the plasticizing unit 10 is separated into the high shear unit 20 is provided. The plasticizing part different from the structure which is different from the plasticizing unit 10 of the form to be used or this embodiment may be used.

In other words, the plasticizing portion for plasticizing the solid resin to obtain the molten resin is separated from the high shear portion, and only the molten resin of appropriate properties can be injected into the high shear portion.

In addition, the structure, the shape, etc. of the heating cylinder 21 and the internal feedback screw 23 of the high shearing unit 20 are not limited to this embodiment, It can set arbitrarily.

In addition, the position, quantity, etc. of the injection part 22, the resin pressure sensor 33, the temperature sensor 34, the cooling flow paths 35, 36, 37, the heater 38, etc. of the high shear unit 20 are arbitrary. Can be set.

In addition, in this embodiment, the slit 211 formed in the heating cylinder 21, the heating taper surface 212, the screw groove part 251 formed in the shaft 25, the shaft taper surface 252, etc. It is the structure corresponding to resin leaked from the high shear area | region K, respectively, and can also be abbreviate | omitted.

In addition, in the present invention, the material according to the total resin pressure P1 and the rear resin pressure P2 detected by the high resin unit 20A and the total resin pressure sensor 33B in the high shear unit 20. Although the control means 2 which controls injection amount, material temperature, kneading time, screw rotation speed, etc. was provided, the control means 2 is not necessarily essential. At least the plasticizing unit 10, the high shear unit 20, the opening-closing injection valve 31 provided in the injection part 22, and the opening / closing discharge valve 32 provided in the discharge part 29a are provided. If so, the polymer material or the like can be subjected to high shear under conditions set in advance on the basis of the experiment or the like without providing the control means 2, the resin pressure sensor 33, or the like.

1 is a partial cross-sectional view showing a schematic configuration of a high shear device according to an embodiment of the present invention.

2 is a partial cross-sectional view showing the main part structure of the high shear unit.

3 is a partially enlarged cross-sectional view of the high shear device.

4 is an enlarged view of the high shear screw shown in FIG. 3.

Fig. 5 is a high shear flow diagram using the high stage apparatus.

6 is a timing chart showing the resin pressure at the time of high shear in the high shear unit, the rotation speed of the internal feedback screw, and valve opening and closing.

7 is a sectional view showing a schematic configuration of a conventional high shear section.

Claims (12)

A high shear device for dispersing and mixing polymer materials at a nano level by kneading while applying high shear stress, A preheating unit for heating the polymer material to obtain a plasticizing material; An internal feedback screw in which a feedback hole communicates therein along a central axis is installed in the material heating vessel so as to be rotatable at a high speed, and the plasticizing material supplied from the preheating part is rotated by the rotation of the internal feedback screw in the feedback hole. High shear end to give a high shear stress while circulating through, Opening and closing injection means provided in a material injection unit for injecting the polymer material heated from the preliminary heating unit into the material heating tube; A high shear device comprising openable and openable discharging means provided in a material discharging portion for discharging the high sheared polymer material from the material heater. The method according to claim 1, A first pressure sensor for detecting a first pressure in the vicinity of the inlet of the return hole of the internal return screw and a second pressure sensor for detecting the second pressure in the vicinity of the discharge port of the return hole are provided in the material heating tube. , And a control means for controlling rotation and stop of the internal feedback screw based on the first pressure and the second pressure. The method according to claim 1, A high shear device, wherein the preheater is a plasticizer that plasticizes and melts the solid polymer material. The method of claim 3, A plasticizing screw is installed in the plasticizing heating tube in the plasticizing section, and the plasticizing screw is rotated at a lower speed than the high speed rotation of the internal feedback screw to melt the solid polymer material, thereby melting the molten polymer material. The high shear device provided with the structure supplied to the said high shear part from the said material injection | pouring part provided in the plasticization heating cylinder. The method according to claim 1, The high shear device of the rotational speed of the internal feedback screw 100 ~ 3300m ^-1 . The method according to any one of claims 1 to 5, An inner circumferential surface of the material heating cylinder is formed into a substantially cylindrical shape, and screw blades are formed in a spiral shape on a substantially cylindrical groove surface on an outer circumferential surface of the inner return screw. A gap between the inner circumferential surface of the material heating portion and the groove surface of the inner return screw is constant over the direction of the center axis. The method according to claim 1, The high shear device in which the notch part is formed in the predetermined position corresponding to the base end side of the said internal feedback screw of the said material heating cylinder. The method according to claim 1, The high shear device in which the inside of the base end side of the said material heating cylinder is provided with the heating cylinder taper surface which gradually increases in inner diameter as it goes from a front end side to a base end side. The method according to claim 1, The high shear device in which a cooling flow path is provided in the predetermined position of the base end side of the said material heating cylinder. The method according to claim 1, In the high end, a shaft for coaxially connecting each of the inner return screw and the rotational axis of the drive motor for driving the inner return screw is provided, and the shaft is reversed to the tip outer peripheral surface near the inner return screw. A high shear device having a threaded groove in the shape of a screw. The method according to claim 10, The shaft is rotatably supported by the anti-vibration support portion in the axial middle portion thereof, and a shaft taper surface is formed in which the inner diameter gradually increases as the drive shaft is rotated from the anti-vibration support portion to the internal feedback screw side. High shear device. As a high shear method for dispersing and mixing the polymer material at the nano level by kneading while applying high shear stress, Heating and plasticizing the polymer material; Supplying the plasticized polymer material by opening the injection means provided in the material injection unit in a material heating container rotatably accommodating an internal feedback screw; A step of rotating the internal feedback screw at a high speed at a rotational speed of 100 to 3300 m ⁻¹ in the material heating tube to circulate and flow the polymer material in and out of the internal feedback screw to give high shear stress and high shear. and, And a step of opening and discharging the discharging means provided with the material discharging portion of the polymer material whose internal structure is dispersed and mixed at a nano level by the high shear.

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