JP2009097137A - Melt-spinning method and melt-spinning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of melt-spinning a thermoplastic resin, causing no sedimentation of additives along the feeding route from its terminal, by continuously adding the additives to the thermoplastic resin at a defined ratio, and also to provide an apparatus therefor. <P>SOLUTION: When the thermoplastic resin, which includes powdery granules A having ≥35° angle of repose measured by a pouring method, is melt-spun, the inner pressure of the feeding route for the powdery granules A, the feeding route for the powdery granules B of the thermoplastic resin, and the storage tank are kept positive, and the whole end of the feeding route for the powdery granule A is substantially kept un-contact to the powdery granules B by a regulative hood for the powdery granule B in the storage tank, thereby the melt-spinning is carried out while the powdery granule A is continuously added. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a melt spinning method that can be suitably applied in producing a high-quality yarn.

  The functional particles and pigments are mastered as a method of melt spinning by adding functional particles or pigments with functions such as moisture absorption, antibacterial properties and permeation to a granular material of thermoplastic resin such as polyester and polyamide at a fixed ratio. A method is generally known in which a master batch is mixed with a thermoplastic resin powder as a main raw material at a constant ratio after being batched (Patent Document 1). One reason for making a masterbatch is that powders having a small particle size such as functional particles and pigments are very poor in handling properties.

  However, when masterbatching is performed, steps related to masterbatch processing are required and costs are added compared to the case where functional particles and pigments are added directly without masterbatching. There is a problem that the cost of raw materials increases significantly.

  And as a method other than adding the master batch, for example, functional particles and pigments are added as they are in batch processing in the raw material polymerization stage such as a thermoplastic resin or after the polymerization process without making the master batch. The method is common. However, the batch processing process is a process of measuring and mixing main raw materials such as thermoplastic resins and various auxiliary raw materials such as functional particles and pigments, so that the equipment is large and enormously expensive. There is a problem that the structure becomes complicated and that it takes a lot of time for cleaning when changing the type of the auxiliary material. In addition, a raw material transport process by air blowing is assembled to mix powder particles such as functional particles and pigment and powder particles of thermoplastic resin by batch processing and supply the mixture to the melt spinning process. If so, there is a tendency that a part of the added granular material is separated, that is, granular materials having different physical specifications such as shape, specific gravity, and angle of repose are separated from each other. Furthermore, a part of the separated granular material is trapped by a cyclone, a filter, or the like, which causes a variation in addition.

An angle of repose is an example of an index that represents the flow characteristics of a granular material. Although depending on the material of the granular material, in general, the smaller the particle size of the granular material, the worse the fluidity and the greater the angle of repose. A powder having an average particle size of 10 μm or less is generally called a fine powder, and its fluidity becomes very poor and is more susceptible to the influence of electrostatic force or intermolecular force. The property of being easily attached to the wall surface and being easy to aggregate powder particles appears strongly, and special measures are required for handling. On the other hand, there is an upper limit to the average particle size of the particles that can be contained in the polymer in the melt spinning process, and generally the upper limit is 5 to 10 μm in view of the spinning performance and the clearance of precision machine parts such as gear pumps. Patent Document 2 proposes an apparatus for continuously adding a powder pigment immediately above an extruder, and the powder joins the pellet in a state where the powder pigment charging tube is surrounded by the main raw material pellet. Patent Document 3 proposes a method and an apparatus for stably adding a minute amount of a granular material having a small particle size, a small angle of repose, and a very poor fluidity under pressure, such as functional particles and pigments, In the same manner as in Patent Document 2, the addition is performed in a state where the supply path of the additive is surrounded by the main raw material pellets.
JP-A-1-123707 JP 2004-322473 A JP 2007-119989 A

  However, in the conventional method in which the addition is performed in a state where the supply path of the additive is surrounded by the main raw material, the additive gradually starts to accumulate starting from the end of the supply path of the additive when the operation is continued for a long time. As a result, the supply path is gradually narrowed, the supply amount is decreased, the supply path is further blocked, the supply amount becomes zero, and the accumulated additive is peeled off and the supply amount fluctuates. Cause quality abnormalities.

  The present invention has been made in order to solve these problems, and the additive is not continuously deposited from the end of the supply path of the additive, and is continuously added to the thermoplastic resin at a constant ratio for a long period of time. An object of the present invention is to provide a melt spinning method and an apparatus therefor.

The present invention for solving the above-described problems is characterized by the following configuration.
(1) The granular material A having an angle of repose of 35 ° or more by injection method measurement is added to the storage tank of the thermoplastic resin granular material B through the supply path of the granular material A, and the granular material A is contained. When melt-spinning the thermoplastic resin fiber to be melted, the powder A is continuously spun into the storage tank while spinning so that the entire periphery of the end of the supply path does not touch the powder B. A method for melt spinning thermoplastic resin fibers.
(2) The method for melt spinning thermoplastic resin fibers according to (1) above, wherein the internal pressure of the supply path and the storage tank is maintained at a positive pressure.
(3) Supply path of the granular material A having an angle of repose of 35 ° or more by injection method measurement, supply path of the granular material B of thermoplastic resin, and melting the granular material B and kneading with the granular material A And a storage tank communicating with the supply path of the granular material B and the extruder, a regulation hood for the granular material B is provided in the storage tank, and the entire end of the regulated hood is provided. The circumference is disposed below the upper end of the connecting portion of the powder B and the storage tank, and the horizontal projection surface at the end of the powder A supply path is disposed inside the regulating hood. An apparatus for melt spinning thermoplastic resin fibers.
(4) The whole end of the supply path of the granular material A is disposed in a space above the upper surface of the granular material B on the inner side of the regulating hood, as described in (3) above Melt spinning equipment.
(5) The melt spinning apparatus according to (3) or (4), wherein the entire periphery of the end of the supply path of the granular material A is disposed above the entire periphery of the end of the regulating hood.
(6) Supply path of the granular material A having an angle of repose of 35 ° or more by injection method measurement, supply path of the granular material B of thermoplastic resin, and melting the granular material B and kneading with the granular material A And a storage tank communicating with the supply path of the granular material B and the extruder, and a cylindrical regulating hood of the granular material B provided in the storage tank, A thermoplastic resin fiber melt spinning apparatus, wherein the hood is disposed so as to satisfy all of the following (i) to (iii):
(I) The whole circumference of the lower end of the regulated hood is below the upper end of the connecting portion of the powder B supply path and the storage tank. (Ii) The vertical projection plane at the lower end of the supply path of the granular A is the regulated hood. (Iii) The horizontal projection surface at the lower end of the supply path of the granular material A is inside the horizontal projection surface of the regulating hood (7) The outer peripheral surface of the supply path of the granular material A The melt spinning apparatus according to any one of (3) to (6), wherein a sealing mechanism is provided between the storage tank and the storage tank.
(8) The melt spinning apparatus according to any one of (3) to (7), wherein the regulation hood and the supply path for the powder A are integrally formed.
(9) A second restriction hood that prevents the powder B from coming into contact with the restriction hood is provided outside the restriction hood, and the second restriction hood end circumference is below the restriction hood end circumference. The melt spinning apparatus according to any one of (3) to (8), wherein the melt spinning apparatus is provided.
(10) The melt spinning apparatus according to any one of (3) to (9), wherein the supply path of the granular material A can be divided into at least two or more.

  According to the present invention, when spinning while continuously continuously adding a granular material having poor fluidity to a thermoplastic resin granular material continuously supplied to an extruder at a constant ratio, an additive (the granular material having poor fluidity is used). It is possible to carry out continuous melt spinning stably for a long period of time without depositing the additive starting from the end of the supply path of the body.

  Embodiments of the present invention will be described below with reference to the drawings.

  For example, as shown in FIG. 1, the melt spinning apparatus of the present invention is configured to supply a fixed quantity supply unit 4 for a granular material 5 having an angle of repose of 35 ° or more as measured by an injection method, and a granular material having an angle of repose of 35 ° or more The path 7, the supply path 3 of the thermoplastic resin granules, the thermoplastic resin granules are melted, and the molten thermoplastic resin and the granules 5 having an angle of repose of 35 ° or more are kneaded into the die. An extruder 1 to be supplied, a storage tank 6 for thermoplastic resin particles disposed immediately above the extruder 1, a storage tank 6, and a regulating hood 8 are provided.

  The extruder 1 may be a single screw or a twin screw depending on the number of screws. Although not particularly limited, a biaxial one is preferable in consideration of the kneading effect of the granular material. Other methods for increasing the kneading effect include reducing the clearance between flights or generating a shearing force by passing a molten thermoplastic resin and a granular material having an angle of repose of 35 ° or more through a throttle. There are methods to increase the kneading effect. There is also a method of installing a static mixer in the molten polymer pipe to the die after leaving the extruder.

  The thermoplastic resin granular material supply path 3 communicates with the storage tank 6 and supplies the thermoplastic resin granular material 2 of the storage tank to the storage tank 6 by its own weight, such as a metal pipe or a flexible hose. Etc. can be used. The storage tank 6 has an outlet communicating with the extruder inlet, and supplies the thermoplastic resin granular material 3 to the extruder by its own weight.

  The fixed quantity feeder 4 can use a screw type feeder, a table type feeder, a vibration type feeder, or the like depending on the purpose, but it is important to select one that is suitable for the characteristics of the granular material to be handled. In any of the feeders, when a highly granular material is used, a measure may be necessary because the quantitative property generally deteriorates. A rotary motion type feeder such as a screw type or table type feeder can change the supply amount of powder and particles per unit time by changing the number of revolutions. In the vibratory feeder, the amount of powder supplied per unit time can be changed by changing the magnitude of the amplitude, the change in the frequency, or the like. In controlling the powder supply amount, feedback control by weight detection may be performed. The outlet of the metering feeder 4 communicates with the powder supply path 7.

  The granular material supply path 7 introduces the granular material having an angle of repose of 35 ° or more supplied by the fixed amount feeder 4 onto the thermoplastic resin granular material 2 in the storage tank 6 by dropping under its own weight. Metal pipes and flexible hoses can be used.

  It is preferable to arrange | position the supply path 7 of a granular material so that it may incline with respect to a horizontal surface at an angle of (powder angle of repose +10) degree or more, More preferably, it is perpendicular | vertical. Moreover, in order to prevent adhesion of the granular material to the inner surface of the supply path, the surface roughness of the inner surface of the supply path is preferably 10 μm or less, more preferably 1 μm or less in terms of arithmetic average roughness. In some cases, reducing the friction coefficient of the inner surface of the supply path by the fluororesin coating may be effective for preventing the adhesion of the granular material.

  The cause of the powder particles adhering to the wall surface is mainly due to the binding force such as electrostatic force or van der Waals force. In general, a powder that easily adheres is called an adherent powder, and a powder that adheres more easily is called a strongly adherent powder. Examples of the strongly adherent powder include wheat flour, titanium oxide powder, and magnesium oxide powder having a very small particle size. If the powder particles adhere to the inner surface of the supply channel, the amount actually supplied to the thermoplastic resin particles will fluctuate, accumulate over time in the supply channel, and the supply channel will be blocked by the powder particles. May occur. In addition to the above-mentioned method of reducing the coefficient of friction in the supply channel, as a method to prevent the powder and particles from adhering to the inner surface of the supply channel, vibrations are applied to eliminate static electricity or blow off gas forcibly. The method of doing is given. However, in the case of a strong adhesive powder, it is often difficult to achieve complete adhesion prevention by such a physical method, and periodic cleaning of the supply path is indispensable. As a more effective method for preventing adhesion, there is a method of modifying the surface of the granular material, which can weaken the bonding force between the supply path and the granular material surface and reduce the adhesive force. There is.

  In the melt spinning apparatus of the present invention, the thermoplastic resin particles 2 are continuously supplied to the extruder 1 through the supply path 3 and the storage tank 6, and the particles having an angle of repose of 35 ° or more are quantitatively supplied. 4 and the supply path 7 are continuously supplied onto the thermoplastic resin particles 2 in the storage tank 6.

  The granular material having an angle of repose of 35 ° or more is a granular material generally considered to have poor fluidity, and specifically includes pigments and metal oxides. The angle of repose of the granular material is measured by the injection method as follows. That is, a funnel having an outlet diameter of 10 mm is installed such that the funnel outlet is at a height of 100 mm from the horizontal plate, and the angle of the conical deposition layer formed by dropping the granular material on the horizontal plate from the funnel. Is measured using a protractor. In the case of a granular material with strong adhesiveness, a 24-mesh sieve is placed on the funnel, and the granular material is supplied to the funnel little by little from the sieve by electromagnetic vibration with moderately adjusted strength.

  For granules with an angle of repose of 35 ° or more, there is an upper limit to the average particle size of the granules that can be contained in the polymer in the melt spinning process, and the clearance of precision machine parts such as the spinning quality and gear pump. Therefore, it is preferable that the average particle diameter is 10 μm or less.

  On the other hand, the kind of thermoplastic resin powder is not particularly limited. For example, a granular material such as polyester or polyamide. Also, the shape is not particularly limited, such as a spherical shape, a cylindrical shape, or an elliptical cylindrical shape.

  Further, in the present invention, the internal pressure of the supply path 7 for the granular material having an angle of repose of 35 ° or more, the supply path 3 for the thermoplastic resin granular material, and the storage tank 6 can be maintained at a positive pressure (above atmospheric pressure). preferable. In melt spinning, an inert gas such as nitrogen is usually sealed in order to absorb moisture and prevent oxidation of the thermoplastic resin particles. The supply path 3 and the storage tank 6 are also positively charged with nitrogen gas, for example. Just keep it. For that purpose, it is preferable to take measures such as integrally forming the thermoplastic resin powder supply path 3 and the quantitative supply machine 4 as a closed system. Further, in the supply path 3 or the storage tank 6 and the metering feeder 4 so that the internal pressure of the system can be made uniform by quickly following the internal pressure fluctuation of the supply path 3 or the storage tank of the thermoplastic resin particles. It is also preferable to provide a pressure equalizing tube.

  In the storage tank 6, a regulating hood that regulates the flow of the thermoplastic resin granules so that the entire periphery of the supply path 7 of the granules with an angle of repose of 35 ° or more does not touch the thermoplastic resin granules. 8 is provided. The regulating hood 8 is disposed so that the entire circumference of the regulating hood end 8 (a) is below the connection portion upper end 3 (a) between the supply path 3 for the thermoplastic resin granular material and the storage tank 6. The hood end 8 (a) is embedded in the supplied thermoplastic resin particle body 2 and disposed so that the horizontal projection surface at the end of the supply path 7 is inside the regulating hood 8. The thermoplastic resin granules 2 are continuously consumed from the outlet of the storage tank by the operation of the extruder 1, and at the same time, the thermoplastic resin granules 2 move downward due to their own weight, but the thermoplastic resin granules 2 Is controlled by the above-described regulating hood end 8 (a) embedded in the thermoplastic resin granular material 2, the granular material A having an angle of repose of 35 ° or more is the entire circumference of the end of the supply path 7. Is continuously added to the storage tank 6 while maintaining a state where it does not touch the thermoplastic resin particles 2. The thermoplastic resin granular material 2 regulated by the regulated hood end 8 (a) starts from the regulated hood end 8 (a) and has a conical shape with the apex on the bottom and the bottom on the inside of the regulated hood. The upper surface of the granular material is formed. The angle formed between the upper surface 9 of the thermoplastic resin granules formed at the regulated hood end 8 (a) and the horizontal plane is determined by the angle of repose of the thermoplastic resin granules 2, the pressure applied to the granules, It depends on conditions such as consumption.

  The shape of the regulating hood 8 is preferably a cylindrical shape so that the thermoplastic resin particle body 2 is supplied to the extruder so that the moving speed distribution is more uniform without stagnation, If it is cylindrical, the cross-sectional shape may be other shapes such as a square shape. A metal pipe, a processed metal plate, or the like can be used for the regulation hood 8.

  The regulating hood 8 may be a thermoplastic resin granular material even if the upper portion of the hood is coupled to the storage tank as shown in FIG. 1 or the upper portion of the regulating hood 8 is coupled to the supply path 7 as shown in FIG. Any structure may be used as long as 2 does not enter the regulated hood 8. However, when the upper part of the regulating hood 8 is combined with the supply path 7 as shown in FIG. 4 to form an integral structure, the upper part of the regulating hood 8 is conical so that the thermoplastic resin particles do not stay on the upper part of the regulating hood 8. Is preferred. Moreover, in the upper part of the regulation hood, as long as the thermoplastic resin powder body 2 is above the uppermost position in contact with the regulation hood 8, an opening structure as shown in FIG. That is, the upper part of the regulation hood 8 may be a closed structure or an opening structure as long as the thermoplastic resin granular material 2 does not enter the regulation hood 8.

  Regulated hood so that the entire circumference of the supply passage end 7 (a) of the granular material having an angle of repose of 35 ° or more does not touch the upper surface 9 of the thermoplastic resin granular material formed at the regulated hood end 8 (a). It is preferable to dispose in the space above the upper surface 9 of the thermoplastic resin particle formed at the end 8 (a). When the upper surface 9 of the thermoplastic resin granular material is in contact with the supply passage end 7 (a), the granular material 5 having a repose angle of 35 ° or more gradually starts from the contact point of the supply passage end 7 (a). May start to deposit. Therefore, it is more preferable that the distance between the supply path terminal 7 (a) and the upper surface 9 of the thermoplastic resin granular material is larger. Specifically, the supply path terminal 7 (a) of the granular material having an angle of repose of 35 ° or more. It is preferable to arrange the entire circumference above the entire circumference of the regulating hood end 8 (a). More preferably, it is preferable that the vertical projection plane of the supply passage end 7 (a) is arranged in the vertical projection plane of the regulating hood 8. The vertical projection plane is a projection plane obtained when a shadow is projected on a plane extending in the vertical direction (for example, a plane extending in the vertical direction in FIG. 1).

  Further, the entire circumference of the end of the supply passage 7 for the granular material having an angle of repose of 35 ° or more is higher than the whole circumference of the end of the restriction hood 8 and the horizontal plane including the uppermost position of the restriction hood end 8 (a) and the angle of repose It is preferable that the vertical distance 12 with respect to the horizontal plane including the lowest position of the supply path end 7 (a) of the granular material of 35 ° or more is larger, specifically 10 mm or more. If the vertical distance 12 is 10 mm or more, it can be said that there is very little possibility that the upper surface 9 of the thermoplastic resin granular material formed by the regulating hood end 8 (a) contacts the supply path end 7 (a). Furthermore, considering that the shape of the upper surface 9 of the thermoplastic resin particles changes somewhat with the consumption of the thermoplastic resin particles by the extruder, the vertical distance 12 is preferably 20 mm or more. The inner surface shape of the end portion of the supply path 7 may be a straight tube shape or the like, and the end portion may have a divergent shape. The supply path terminal 7 (a) can be arranged inside the regulating hood as shown in FIG. 1, or can be arranged above the regulating hood as shown in FIG.

  As described above, supply of the granular material A so that the granular material 5 having an angle of repose of 35 ° or more is reliably supplied to the upper surface 9 of the thermoplastic resin granular material formed at the regulated hood end 8 (a). The path 7 is arranged so that the horizontal projection surface of the supply path end 7 (a) is inside the regulating hood 8. The horizontal projection plane is a projection plane obtained when a shadow is projected on a plane extending in the horizontal direction (for example, a plane extending in the left-right direction in FIG. 1).

  In order to further increase the accuracy of the addition ratio, the hollow portion of the upper surface 9 of the thermoplastic resin particle formed at the regulated hood end 8 (a) has a more stable movement speed of the thermoplastic resin particle. So that the center point in each horizontal cross section of the outlet of the constant quantity feeder 4, the supply path 7, the regulating hood 8 and the inlet of the extruder is on the same center line (on the same straight line). It is preferable to arrange the supply path 7 and the regulating hood 8. When the center point in each horizontal section of each device deviates from the same center line, the chance of contact with the powder increases, and when using a highly adherent powder, it may cause deposition. . Furthermore, the vertical line including the supply path end 7 (a) of the granular material 5 having an angle of repose of 35 ° or more and the restricted food end 8 so that the granular material 5 having an angle of repose of 35 ° or more does not adhere to the inner surface of the regulated hood 8. The minimum value 13 of the vertical distance from the vertical line including (a) is preferably 10 mm or more, and more preferably 20 mm or more. As a method for preventing the granular material 5 having an angle of repose of 35 ° or more from adhering to the inner surface of the regulated hood 8, a method of reducing the friction coefficient of the inner surface of the regulated hood is known. Is mentioned.

  As shown in FIG. 3, if a sealing mechanism is provided between the storage tank 6 and the outer peripheral surface of the supply path 7, the supply path 7 can be configured to be easily removable. Although the inside of the storage tank is normally positive pressure, if the internal gas leaks to the outside from the connection part of the storage tank 6 and the supply path 7, the gas sealing effect of the thermoplastic resin particle body 2 is reduced, and the angle of repose is 35. There is a possibility of causing fluctuations in the supply amount of the granular material above °° C. Therefore, it is preferable to use an appropriate sealing mechanism according to the pressure in the storage tank. A sealing mechanism using rubber such as an O-ring is generally used.

  In order to stably add the granular material 5 having an angle of repose of 35 ° or more, it is preferable to periodically clean the inside of the supply path 7, but if the cleaning is performed while the supply path 7 is fixed to the storage tank 6, extrusion is performed. There is a risk that a mass of the granular material 5 having an angle of repose of 35 ° or more will enter the machine and damage equipment such as a gear pump and a spin pack. If the supply path 7 can be easily detached, a pipe that has been cleaned in advance is prepared, and if it is replaced with this, there is a concern that the mass of the granular material 5 having an angle of repose of 35 ° or more will enter the extruder. Absent. Therefore, it is preferable that the supply path 7 is configured to be easily removable, and a seal mechanism is provided between the storage tank 6 and the outer peripheral surface of the supply path 7.

  Further, as shown in FIG. 4, the upper portion of the regulating hood 8 can be combined with the supply path 7 to form an integral structure, and a sealing mechanism can be provided between the storage tank 6 and the outer peripheral surface of the supply path 7. As a result, not only the supply path 7 but also the regulated hood 8 can be removed at the same time. Since the granular material 5 having an angle of repose of 35 ° or more may adhere to the inner surface of the regulated hood, it is preferable that the regulated hood 8 is also removable.

  However, it takes some labor to directly embed the regulating hood 8 integrated with the supply path 7 in the thermoplastic resin particle body 2. Further, when the regulation hood 8 integrated with the supply path 7 is embedded in the thermoplastic resin particle 2 in the thermoplastic resin granule 2, the thermoplastic resin particle 2 is electrostatically applied to the inner surface of the regulation hood 8. In some cases, it may adhere due to force or the like, and there is a possibility that the granular material 5 having an angle of repose of 35 ° or more adheres to the thermoplastic resin granular material 2 attached to the inner surface of the regulating hood 8. Therefore, more preferably, as shown in FIG. 5, the upper portion of the regulation hood 8 is combined with the supply path 7 to form an integral structure, and a sealing mechanism is provided between the storage tank 6 and the outer peripheral surface of the supply path 7, and the regulation hood is further provided. 8 is provided with a second regulating hood 11 outside.

  In order to prevent the regulated hood 8 from coming into direct contact with the thermoplastic resin granular material 2, the entire circumference of the second regulated hood end 11 (a) is disposed below the entire circumference of the regulated hood end 8 (a). In consideration of the fact that the shape of the upper surface 9 of the thermoplastic resin granules 2 changes somewhat with the consumption of the thermoplastic resin granules by the extruder, it includes the uppermost position of the second regulated hood end. The vertical distance 14 between the horizontal plane and the horizontal plane including the lowermost position of the regulating hood end is preferably 5 mm or more. When the distance between the horizontal plane including the second regulated hood end 11 (a) and the regulated hood end 8 (a) is large, the repose angle supplied to the inner surface of the second regulated hood through the supply path 7 is 35 ° or more. Since the granular material 5 may adhere, it is preferable that the vertical distance 14 between the horizontal plane including the uppermost position of the second regulating hood end and the horizontal plane including the lowest position of the regulating hood end is 100 mm or less.

  Thereby, the thermoplastic resin granular material 2 does not adhere directly to the inner surface of the regulated hood 8, and the granular material 5 having an angle of repose of 35 ° or more does not adhere to the inner surface of the second regulated hood 11. The regulation hood 8 that is integrated with the supply path 7 can be easily attached and detached. Another effect of the second restriction hood is that the restriction position of the restriction hood can be restricted by the second restriction hood 11. That is, by reducing the clearance between the regulation hood 8 and the second regulation hood 11, when the regulation hood 8 that is combined with the supply path 7 and is integrated is attached, the position of the regulation hood 8 is fixed to the storage tank. It becomes easy to make the center point in each horizontal cross section of the 2nd control hood 11 and the supply path 7 close to the same center line position (on the same straight line).

  When there is no second regulating hood 11, the support point of the supply path 7 is only the seal mechanism 10 as shown in FIGS. 3 and 4, and therefore the center point of the supply path end 7 (a) changes every time it is detached. there is a possibility. The fact that the center point of the supply passage end 7 (a) fluctuates means that the inclination of the supply passage 7 fluctuates, increasing the chance that the granular material comes into contact with one side of the inner surface of the supply passage 7, and the adhesiveness is increased. If strong particles are used, it can cause deposition.

  Further, in the present invention, as shown in FIG. 6, it is also preferable that the supply path 7 for the powder and granule having an angle of repose of 35 ° or more can be divided into at least two. That is, it is also preferable to provide the connection portion 15 in the supply path 7 and connect the constituent members of the supply path 7 with the connection portion 15. The granular material 5 having an angle of repose of 35 ° or more tends to adhere to and accumulate on the inner surface in the vicinity of the supply passage end 7 (a) and the inner surface in the vicinity of the regulating hood end 8 (a). Therefore, if the supply path 7 can be divided as described above, after the supply path 7 is taken out, only the end portion where the accumulated amount of the granular material 5 is large is divided and removed, and only that part is replaced and cleaned. be able to. This is more economical and more efficient than exchanging and cleaning the entire supply path 7.

  When the supply path 7 can be divided, the position of the connecting portion 15 is determined in the lower range of the seal mechanism 10 in consideration of the accumulation state of the granular material 5, workability, and the like. 4 and 5, the connecting portion 15 is provided at a position above the regulating hood 8 so that both the supply path end 7 (a) and the regulating hood end 8 (a) can be detached at a time. Such a configuration is preferable because it is economically and work efficient, but is not limited thereto. That is, it is important that the position of the connecting portion 15 is found from an economical and work point of view by carefully observing the accumulation tendency of the granular material 5 at the end of the supply path 7.

  In addition, when the supply path 7 is detached and cleaned, the number of divisions may be increased by increasing the number of connection portions 15 in order to facilitate handling. And it is preferable to take the connection form which does not produce a level | step difference as much as possible in the inner surface of the supply path 7 containing the connection part 15 so that a granular material may not accumulate from the connection part 15, and the supply path divided | segmented when connecting It is also preferable to adopt a fitting structure so that the respective positions can be easily aligned. Specifically, ISO standards and I.D. D. It is preferable to use a sanitary specification joint according to F standard, 3A standard, JIS standard or the like.

  With the above-described configuration, in the present invention, a powder particle having an angle of repose of 35 ° or more is spun while continuously added without allowing the entire periphery of the end of the supply path 7 to touch the thermoplastic resin particle. Is possible. That is, the additive can be melt-spun by continuously adding to the thermoplastic resin at a constant ratio for a long period of time without depositing the additive starting from the end of the supply path of the additive.

  In the present invention, the “terminal” refers to the lower end in the vertical direction.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not limited only to a following example. The evaluation method is as follows.

(1) Measurement of angle of repose of granular material It measured by the injection method. Specifically, a funnel having an outlet diameter of 10 mm is installed so that the funnel outlet is at a height of 100 mm from the horizontal plate, and a granular deposit is formed by dropping the granular material from the funnel onto the horizontal plate. The angle of the layer was measured using a protractor. A 24-mesh sieve was placed on the funnel, and the granular material was supplied to the funnel little by little by electromagnetic vibration with moderately adjusted strength. In addition, three angles were read and the arithmetic average was taken as the angle of repose.

(2) Measurement of the average particle diameter of the granular material Using a dense particle size distribution measuring device ("Multisizer 3" manufactured by Beckman Coulter, Inc.), the weight distribution with respect to the particle diameter is obtained by the Coulter counter method, and the mode value of the weight distribution ( The particle size at which the weight value is the largest) was taken as the average particle size of the powder.

(3) Measurement of bulk density of granular material The bulk density was measured based on JIS-Z-2504 (2000) using a powder physical property measuring device (Multi Tester MT-1001, Seisin Corporation).

(4) Dyeing evaluation The spun fiber was wound around a paper tube at 6.0 kg. From this drum, 100 g of yarn was divided and 60 child yarns were collected. Using the outermost child yarn as a blank, the presence or absence of a dyeing difference with the remaining 59 child yarns was evaluated. Evaluation was made by creating a tube knitting so that the blank yarn and the remaining 59 yarns were alternated, dyed in a water bath adjusted to 80 ° C. and pH 5.0 for 40 minutes, and evaluated by 5 people. When the person made a visual judgment and there was even one dyeing difference, it was marked as x. When the evaluations of five people were divided, a number of evaluations were adopted. As a dye, 1% owf of Nylon Milling Blue N-GFL 167% (manufactured by Clariant Japan Co., Ltd.) was used. Sampling starts supplying the granular material 5 having an angle of repose of 35 ° or more from the quantitative feeder 4 at a certain supply amount, and immediately after adding and spinning to the thermoplastic resin granular material 2 at a constant ratio and the total amount of granular material This was performed when the supply amount reached 10 kg, and dyeing evaluation was performed at each time point.

(5) Vertical distance 12 between the horizontal plane including the uppermost position of the regulating hood end 8 (a) and the horizontal plane including the lowermost position of the supply path end 7 (a) of the granular material A
A horizontal plate is fixed to the lower part of the regulating hood 8 (a), a height gauge is installed on the horizontal plate, and the height of the horizontal plate and the regulating hood end 8 (a) is adjusted by the height gauge to the entire regulating hood end 8 (a). Measure at intervals of 1 mm over the circumference, and let h be the largest measured value. The unit is mm, and round up after the decimal point. Further, the height of the horizontal plate and the supply path end 7 (a) is measured at intervals of 1 mm over the entire circumference of the supply path end 7 (a) by a height gauge installed on the fixed horizontal plate, Let H be the larger value. The unit is mm and rounded down after the decimal point.
The value of Hh is defined as a vertical distance 12 between the horizontal plane including the uppermost position of the restriction hood end 8 (a) and the horizontal plane including the lowermost position of the supply path end 7 (a) of the granular material A.

(6) Minimum value 13 of the vertical distance between the vertical line including the supply path end of the granular material having an angle of repose of 35 ° or more and the vertical line including the regulated hood end
A horizontal plate with a thickness of 50 mm is fixed to the lower part of the regulating hood 8 (a), and the inking machine is applied to the inner end of the regulating hood end 8 (a). Ink is drawn on a horizontal plate to create a horizontal projection of the regulated hood end 8 (a). In addition, with the horizontal plate describing the horizontal projection of the regulated hood end 8 (a) fixed, put the inking machine against the outer end of the supply path end 7 (a) and cross the entire circumference of the supply path 7 (a). Ink is drawn on the horizontal plate at intervals of 1 mm to create a horizontal projection of the supply path end 7 (a). Next, the horizontal plate is taken out, and the part between the projection line of the regulating hood end 8 (a) and the supply path end 7 (a) all around the plate is formed into a plate by machining. Cutting is performed in a vertical direction at a depth of 30 mm. A clearance gauge is inserted in the space between the projected line of the control hood end 8 (a) and the supply line end 7 (a) around the entire circumference, thereby creating a clearance over the entire circumference at intervals of 1 mm. taking measurement. The unit is mm and rounded down after the decimal point. The minimum value of the measured value is defined as the minimum value 13 of the vertical distance between the vertical line including the supply path end of the granular material having an angle of repose of 35 ° or more and the vertical line including the regulated hood end.

(7) Vertical distance 14 between the horizontal plane including the uppermost position of the second restriction hood end and the horizontal plane including the lowermost position of the restriction hood end
A horizontal plate is fixed to the lower portion of the second restriction hood 11 (a), a height gauge is installed on the horizontal plate, and the height of the horizontal plate and the second restriction hood end 11 (a) is set to the second height by the height gauge. The measurement hood end 11 (a) is measured at intervals of 1 mm over the entire circumference, and h is the largest measured value. The unit is mm, and round up after the decimal point. Further, the height of the horizontal plate and the regulated hood end 8 (a) is measured at intervals of 1 mm over the entire circumference of the hood end 8 (a) by a height gauge installed on the fixed horizontal plate, and the largest measured value is obtained. Let the value be H. The unit is mm and rounded down after the decimal point. The value of H−h is a vertical distance 14 between the horizontal plane including the uppermost position of the second restriction hood end and the horizontal plane including the lowest position of the restriction hood end.

(8) Amount of misalignment of the supply path 7 A downward swing is set at the center of the upper end of the supply path 7, the pendulum is lowered into the supply path, and the tip of the pendulum and the supply path end 7 (a ) Was measured from the center point. When the supply path 7 is detachable, the supply path 7 is temporarily removed and the measurement is repeated after the attachment. The measurement is repeated three times, and the average value of the three measurement values is calculated as the misalignment amount of the supply path 7. did.

(9) Amount of powder deposited in the vicinity of the supply channel end 7 (a) When the granular material 5 having an angle of repose of 35 ° or more is supplied from the fixed amount feeder 4 at a certain supply amount, the total supply amount becomes 10 kg. The supply is stopped, and the granular material adhering to the inner surface of the supply path 7 from the position of the supply path end 7 (a) to the position 100 mm upstream in the supply path longitudinal direction is transferred to the container, and the adhered granular particles Body weight was measured. The measured value was defined as the amount of powder deposited at the supply path end 7 (a).

(10) Desorption workability of supply path 7 The operation of removing the supply path 7 from the storage tank and reattaching it was carried out. The work was carried out by three people one by one, and the work time was the average work time of three workers. In the case of a structure in which only the supply path 7 cannot be detached, it is excluded.

(11) Cleaning workability of supply path 7 The inner surface of the supply path 7 was cleaned, and the time required for the inner surface of the supply path 7 to return to the initial state before supplying the granular material 5 was determined as the cleaning time. Whether the finished state after cleaning the inner surface of the supply path 7 is the initial state was determined by visual determination. The work was carried out by three people one by one, and the work time was the average work time of three workers. When the cleaning time was 10 minutes or more, it was judged as × when it was over 5 minutes and less than 10 minutes, △ when it was over 3 minutes and within 5 minutes, and ◎ when it was within 3 minutes.

(12) Cleaning workability of the regulated hood 8 The inner surface of the regulated hood 8 was cleaned, and the time required for the inner surface of the regulated hood 8 to return to the initial state before supplying the granular material 5 was determined as the cleaning time. Whether the finished state of the inner surface of the regulated hood 8 after cleaning was the initial state was determined by visual judgment. The work was carried out by three people one by one, and the work time was the average work time of three workers. When the cleaning time was 10 minutes or more, it was judged as x, when it was more than 5 minutes and less than 10 minutes, Δ when it was more than 3 minutes and within 5 minutes, and ◎ when it was within 3 minutes.

<Example 1>
Using the melt spinning apparatus shown in FIG. 1, melt spinning is performed while continuously adding powder A having an angle of repose of 35 ° or more to powder B of thermoplastic resin, and winding is performed at a speed of 5000 m / min. 78 dtex A filament of 52 filaments was obtained.

  In addition, the storage tank 6 in FIG. 1 has an inner diameter of 200 mm, the inside is sealed with nitrogen gas, and the internal pressure is set to a gauge pressure of 1000 Pa.

  The fixed quantity feeder 4 used a table type feeder. As the supply path 7, a straight stainless steel pipe having an inner diameter of 60 mm, an outer diameter of 63 mm, and a length of 2000 mm and having an inner surface roughness of 0.8 μm in arithmetic mean roughness was used. The supply path 7 was arranged so that the plane including the entire circumference of the supply path end 7 (a) was perpendicular to the longitudinal direction of the straight pipe, and the axis was perpendicular to the horizontal plane. Each device is arranged so that the center point in each horizontal section of the outlet of the fixed amount feeder 4, the supply path 7, the regulating hood 8, the storage tank 6, and the extruder inlet is on the same center line. The amount was within 1 mm. The regulation hood 8 was formed into a cylindrical shape having an inner diameter of 103 mm and an outer diameter of 106 mm, and a plane including the entire circumference of the regulation hood end 8 (a) was perpendicular to the cylindrical axis.

  As the powder B of the thermoplastic resin, polyamide whose water content was adjusted to 0.1 wt% was used and supplied to the extruder at a supply amount of 60 kg / Hr in the supply path 3. At this time, magnesium oxide having an average particle diameter of 0.7 μm, an angle of repose of 45 °, and a bulk density of 0.25 g / ml is supplied as 50 g / Hr from the supply path 7 as a granular material A having an angle of repose of 35 ° or more. Supplied.

  The regulating hood 8 is disposed so that the regulating hood end 8 (a) is positioned 200 mm below the upper end 3 (a) of the supply passage connecting portion of the granular material B, and the supply passage end 7 ( a) is disposed above the horizontal plane including the regulated hood end (in the table, this state is described as “on the horizontal plane”), and the horizontal plane including the uppermost position of the regulated hood end 8 (a) and the granular material A The vertical distance 12 with respect to the horizontal plane including the lowest position of the supply path end 7 (a) is 20 mm, the vertical line including the supply path end 7 (a) of the granular material A and the vertical including the regulation hood end 8 (a) The position of the supply path end 7 (a) of the granular material A was determined so that the minimum value 13 of the vertical distance from the line was 20 mm.

  The sealing mechanism 10 between the storage tank 6 and the supply path 7 of the granular material A is not provided, and it is configured such that it cannot be detached. Moreover, the supply path 7 and the regulation hood 8 of the granular material A were made into a separate member, and were fixed to the storage tank.

  The amount of misalignment of the supply path 7 was 1.0 mm. The quality of the obtained yarn was judged by dyeing.

  After the operation of the melt spinning apparatus is started, the entire circumference of the regulated hood end 8 (a) is embedded in the thermoplastic resin particle B, and the supply path end 7 (a) does not touch the thermoplastic resin particle B. It was confirmed that the powder A was supplied. And it confirmed that this state was maintained even when the total supply amount of the granular material A became 10 kg. The dyeing determination immediately after the start of spinning was ○. The amount of powder deposited in the vicinity of the supply path end 7 (a) at the time when the total amount of supply of the granular material A reached 10 kg was 0.9 g, and the dyeing determination of the sample at this point was ○. . Since the supply path 7 cannot be removed, cleaning was carried out from the upper part of the supply path 7 after the fixed amount feeder 4 was retracted. Both the cleaning workability of the supply path 7 and the cleaning workability of the regulated hood 8 were Δ.

<Example 2>
Except for the following changes, melt spinning was performed in the same manner as in Example 1 to obtain a 78 dtex 52 filament yarn wound at a speed of 5000 m / min.

  The regulating hood 8 is cylindrical, and has an inner diameter of 83 mm and an outer diameter of 86 mm. The supply path end 7 of the powder A so that the minimum value 13 of the vertical distance between the vertical line including the supply path end 7 (a) of the powder A and the vertical line including the restriction hood end 8 (a) is 10 mm. The position of (a) was determined.

  The amount of misalignment of the supply path 7 was 1.0 mm. After starting operation of the melt spinning apparatus, it is confirmed that the supply path end 7 (a) is supplied with the powder A without touching the thermoplastic resin powder B, and the total supply amount of the powder A It was confirmed that the state was maintained even when the weight reached 10 kg. The dyeing determination immediately after the start of spinning was ○. The amount of powder deposited in the vicinity of the supply path end 7 (a) at the time when the total supply amount of the powder A reached 10 kg was 3.3 g, which was slightly increased as compared with Example 1, but the sample at this time The dyeing judgment of was ○. Since the supply path 7 cannot be removed, cleaning was carried out from the upper part of the supply path 7 after the fixed amount feeder 4 was retracted. Both the cleaning workability of the supply path 7 and the cleaning workability of the regulated hood 8 were Δ.

<Example 3>
Except for the following changes, melt spinning was performed in the same manner as in Example 1 to obtain a 78 dtex 52 filament yarn wound at a speed of 5000 m / min.

  The regulating hood 8 is cylindrical, and has an inner diameter of 73 mm and an outer diameter of 76 mm. The supply path end 7 of the powder A so that the minimum value 13 of the vertical distance between the vertical line including the supply path end 7 (a) of the powder A and the vertical line including the restriction hood end 8 (a) is 5 mm. The position of (a) was determined. The amount of misalignment of the supply path 7 was 1.0 mm.

  After starting operation of the melt spinning apparatus, it is confirmed that the supply path end 7 (a) is supplied with the powder A without touching the thermoplastic resin powder B, and the total supply amount of the powder A is 10 kg. It was confirmed that the situation was maintained even at that time. The dyeing determination immediately after the start of spinning was ○. The amount of powder deposited in the vicinity of the supply path end 7 (a) at the time when the total supply amount of the powder A reached 10 kg was 5.4 g, which was slightly increased as compared with Example 2, but the sample at this time The dyeing judgment of was ○. Since the supply path 7 cannot be removed, cleaning was carried out from the upper part of the supply path 7 after the fixed amount feeder 4 was retracted. Both the cleaning workability of the supply path 7 and the cleaning workability of the regulated hood 8 were Δ.

<Example 4>
Except for the following changes, melt spinning was performed in the same manner as in Example 1 to obtain a 78 dtex 52 filament yarn wound at a speed of 5000 m / min.

  The supply path end 7 (a) of the granular material A is disposed below the horizontal plane including the regulated hood end (in the table, this state is described as “below the horizontal plane”), and the regulated hood end 8 (a) The vertical distance 12 between the horizontal plane including the uppermost position and the horizontal plane including the lowermost position of the supply path terminal 7 (a) of the granular material A is 5 mm. The amount of misalignment of the supply path 7 was 1.0 mm.

  After starting operation of the melt spinning apparatus, it is confirmed that the supply path end 7 (a) is supplied with the powder A without touching the thermoplastic resin powder B, and the total supply amount of the powder A is 10 kg. It was confirmed that the situation was maintained even at that time. The dyeing determination immediately after the start of spinning was ○. The amount of powder deposited in the vicinity of the supply path end 7 (a) at the time when the total supply amount of the powder A reached 10 kg was 6.5 g, which was a little increased compared to Example 1, but the sample at this time The dyeing judgment of was ○. Since the supply path 7 cannot be removed, cleaning was carried out from the upper part of the supply path 7 after the fixed amount feeder 4 was retracted. Both the cleaning workability of the supply path 7 and the cleaning workability of the regulated hood 8 were Δ.

<Comparative Example 1>
Except for the following changes, melt spinning was performed in the same manner as in Example 1 to obtain a 78 dtex 52 filament yarn wound at a speed of 5000 m / min.

  The supply path end 7 (a) of the granular material A is disposed below the horizontal plane including the regulated hood end, and the horizontal plane including the uppermost position of the regulated hood end 8 (a) and the supply path end 7 of the granular A The position of the supply path end 7 (a) of the granular material A was determined so that the vertical distance 12 with respect to the horizontal plane including the lowest position of (a) was 20 mm. The amount of misalignment of the supply path 7 was 1.0 mm.

  After starting the operation of the melt spinning apparatus, it was confirmed that the powder A was supplied while the supply channel end 7 (a) was in contact with the thermoplastic resin powder B. The dyeing determination immediately after the start of spinning was ○. When the total supply amount of the powder A reached 10 kg, the amount of powder deposited in the vicinity of the supply path end 7 (a) was 50.2, and the vicinity of the supply path end 7 (a) was almost blocked. The dyeing determination of the sample at this time was x. Since the supply path 7 cannot be removed, cleaning was carried out from the upper part of the supply path 7 after the fixed amount feeder 4 was retracted. Since the vicinity of the supply path end 7 (a) is almost closed, the work is very difficult, and the cleaning workability of the supply path 7 and the cleaning workability of the regulating hood 8 are both x.

<Comparative example 2>
Except for the following changes, melt spinning was performed in the same manner as in Example 3 to obtain a 78 dtex 52 filament yarn wound at a speed of 5000 m / min.

  The supply path end 7 (a) of the granular material A is disposed below the horizontal plane including the regulated hood end, and the horizontal plane including the uppermost position of the regulated hood end 8 (a) and the supply path end 7 of the granular A The position of the supply path end 7 (a) of the granular material A was determined so that the vertical distance 12 with respect to the horizontal plane including the lowest position of (a) was 20 mm. The amount of misalignment of the supply path 7 was 1.0 mm.

  After starting the operation of the melt spinning apparatus, it was confirmed that the powder A was supplied while the supply channel end 7 (a) was in contact with the thermoplastic resin powder B. The dyeing determination immediately after the start of spinning was ○. When the total supply amount of the powder A was 10 kg, the amount of powder deposited in the vicinity of the supply path end 7 (a) was 55.9, and the vicinity of the supply path end 7 (a) was almost blocked. The dyeing determination of the sample at this time was x. Since the supply path 7 cannot be removed, cleaning was carried out from the upper part of the supply path 7 after the fixed amount feeder 4 was retracted. As in Comparative Example 1, the vicinity of the supply path end 7 (a) is almost closed, so that the work is very difficult, and the cleaning workability of the supply path 7 and the cleaning workability of the regulating hood 8 are both x.

<Example 5>
Using the melt spinning apparatus shown in FIG. 3, melt spinning was performed in the same manner as in Example 1 except that the following points were changed, and a yarn of 78 dtex 52 filaments was wound at a speed of 5000 m / min.

  A sealing mechanism 10 is provided between the storage tank 6 and the supply path 7 for the granular material A so that the supply path 7 can be detached. The amount of misalignment of the supply path 7 was 5.5 mm, which was larger than that in Example 1.

  After starting operation of the melt spinning apparatus, it is confirmed that the supply path end 7 (a) is supplied with the powder A without touching the thermoplastic resin powder B, and the total supply amount of the powder A is 10 kg. It was confirmed that the situation was maintained even at that time. The dyeing determination immediately after the start of spinning was ○. The amount of powder deposited in the vicinity of the supply path end 7 (a) at the time when the total supply amount of the granular material A reached 10 kg was 2.2 g, which was slightly increased as compared with Example 1, but the sample at this time The dyeing judgment of was ○. Since the supply path 7 is detachable, the supply path 7 was removed and cleaned after the fixed amount feeder 4 was retracted. Although the demounting workability and the cleaning workability of the supply path 7 were both “good”, the regulation hood 8 was fixed to the storage tank 6 so that it could not be detached and the cleaning workability was “△”.

<Example 6>
Using the melt spinning apparatus shown in FIG. 4, melt spinning was carried out in the same manner as in Example 5 except that the following points were changed, and a yarn of 78 dtex 52 filament was wound at a speed of 5000 m / min.

  The upper part of the regulating hood 8 is combined with the supply path 7 to form an integral structure, the upper part of the regulating hood 8 is conical, and the inclination angle of the conical part is 60 ° with respect to the horizontal plane so that the thermoplastic resin particles do not stay on the upper part of the regulating hood 8. did. The misalignment amount of the supply path 7 was 6.5 mm, which was larger than that of Example 5.

  After starting operation of the melt spinning apparatus, it is confirmed that the supply path end 7 (a) is supplied with the powder A without touching the thermoplastic resin powder B, and the total supply amount of the powder A is 10 kg. It was confirmed that the situation was maintained even at that time. The dyeing determination immediately after the start of spinning was ○. The amount of powder deposited in the vicinity of the supply path end 7 (a) at the time when the total supply amount of the powder A reached 10 kg was 2.9 g, which was slightly increased as compared with Example 5, but the sample at this time The dyeing judgment of was ○. Since the supply path 7 is detachable, the supply path 7 was removed and cleaned after the fixed amount feeder 4 was retracted. Regarding the desorption workability of the supply path 7, when the supply path 7 is embedded in the powder B of the thermoplastic resin, the regulating hood 8 becomes a resistance, and it takes a work time compared with Example 5, and the determination is Δ. . Since the supply path 7 and the regulation hood 8 have an integral structure and can be attached and detached, the cleaning workability of the supply path 7 and the regulation hood 8 is ○.

<Example 7>
Using the melt spinning apparatus shown in FIG. 5, melt spinning was carried out in the same manner as in Example 5 except that the following points were changed, and a yarn of 78 dtex 52 filaments was wound at a speed of 5000 m / min.

  A second restriction hood 11 was attached outside the restriction hood 8 and fixed to the storage tank 6. The second regulating hood has a cylindrical shape with an inner diameter of 108 mm and an outer diameter of 112 mm. The second regulating hood end 11 (a) was installed such that the vertical distance 14 between the horizontal plane including the uppermost position of the second regulating hood end and the horizontal plane including the lowest position of the regulating hood end was 5 mm. Due to the regulation hood 11, the upper part of the regulation hood 8 does not come into contact with the thermoplastic resin powder B, and is not a conical shape but a horizontal plate. The amount of misalignment of the supply path 7 was 1.0 mm.

  After starting operation of the melt spinning apparatus, it is confirmed that the supply path end 7 (a) is supplied with the powder A without touching the thermoplastic resin powder B, and the total supply amount of the powder A is 10 kg. It was confirmed that the situation was maintained even at that time. The dyeing determination immediately after the start of spinning was ○. The amount of powder deposited in the vicinity of the supply path end 7 (a) at the time when the total supply amount of the granular material A reaches 10 kg is 0.9 g, which is the same as that of Example 1. The dyeing determination was ○. Since the supply path 7 is detachable, the supply path 7 was removed and cleaned after the fixed amount feeder 4 was retracted. About the desorption workability | operativity of the supply path 7, since the granular material B of a thermoplastic resin is regulated by the 2nd regulation hood 8 (a). Even the supply path 7 integrated with the regulation hood 8 can be easily detached, and the determination was “good”. In addition, since the supply path 7 and the regulation hood 8 have an integral structure and are detachable, the cleaning workability of the supply path 7 and the regulation hood 8 is ○.

<Example 8>
Using the melt spinning apparatus shown in FIG. 6, melt spinning was carried out in the same manner as in Example 7 except that the following points were changed, and a yarn of 78 dtex 52 filament was wound at a speed of 5000 m / min.

  The supply path 7 is composed of two members, and they are connected by a connecting portion 15. The connecting portion 15 was provided at a position 50 mm above the upper end portion of the regulating hood 8. The connection shape was a ferrule joint conforming to the ISO standard. At this time, the level difference in the connection portion was within 0.1 mm. The amount of misalignment of the supply path 7 was 1.0 mm.

  After starting operation of the melt spinning apparatus, it is confirmed that the supply path end 7 (a) is supplied with the powder A without touching the thermoplastic resin powder B, and the total supply amount of the powder A is 10 kg. It was confirmed that the situation was maintained even at that time. The dyeing determination immediately after the start of spinning was ○. The amount of powder deposited in the vicinity of the supply path end 7 (a) at the time when the total supply amount of the granular material A reaches 10 kg is 0.9 g, which is the same as that of Example 1. The dyeing determination was ○. Since the supply path 7 is detachable, the supply path 7 was removed and cleaned after the fixed amount feeder 4 was retracted. About the desorption workability | operativity of the supply path 7, since the granular material B of a thermoplastic resin is regulated by the 2nd regulation hood 8 (a). Even the supply path 7 integrated with the regulation hood 8 can be easily detached, and the determination was “good”. Further, the supply path 7 and the regulation hood 8 have an integral structure, and only the portion including the supply path end 7 (a) and the regulation hood end 8 (a) at which the powder is easily deposited at the connection portion 15 can be detached. Since only this part needs to be cleaned, the cleaning workability of the supply path 7 and the regulating hood 8 was ◎. In order to replace the post-use pipe and the cleaned pipe, only the portion including the supply path end 7 (a) and the regulated hood end 8 (a) needs to be retained as a spare part, which is economically superior. .

It is a schematic diagram of the melt spinning apparatus which shows one embodiment of this invention. It is a schematic diagram of the melt spinning apparatus which shows one embodiment of this invention. It is a schematic diagram of the melt spinning apparatus which shows one embodiment of this invention. It is a schematic diagram of the melt spinning apparatus which shows one embodiment of this invention. It is a schematic diagram of the melt spinning apparatus which shows one embodiment of this invention. It is a schematic diagram of the melt spinning apparatus which shows one embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Extruder 2 Thermoplastic resin granular material 3 Thermoplastic resin granular material supply path 3 (a) Thermoplastic resin granular material supply path connection part upper end 4 Quantitative supply machine 5 Granule whose repose angle is 35 degrees or more Body 6 Reservoir 7 Supply path 7 (a) of granular material having an angle of repose of 35 ° or more 8 Supply path end 8 of granular material having an angle of repose 35 ° or more Regulated hood 8 (a) Regulated hood end 9 Regulated hood end The upper surface 10 of the thermoplastic resin granular material formed by the following: Sealing mechanism 11 Second restriction hood 11 (a) Second restriction hood end 12 Horizontal surface including the uppermost position of the restriction hood end and powder having an angle of repose of 35 ° or more Vertical distance 13 from the horizontal plane including the lowest position of the end of the supply path of the granule 13 Minimum value 14 of the vertical distance between the end of the supply path of the granule having an angle of repose of 35 ° or more and the perpendicular including the end of the regulation hood 14 Second regulation Includes the horizontal plane including the top position of the hood end and the bottom position of the regulated hood end Vertical distance 15 with horizontal plane Connection part of supply path for granular material with angle of repose of 35 ° or more

Claims (10)

Thermoplastic containing powder A by adding powder A having an angle of repose of 35 ° or more by injection method measurement to the storage tank of powder B of thermoplastic resin through the supply path of powder A A thermoplastic resin characterized in that when melt spinning a resin fiber, the powder A is spun by continuously adding it to a storage tank so that the entire periphery of the end of the supply path does not touch the powder B A method for melt spinning fibers. 2. The method for melt spinning thermoplastic resin fibers according to claim 1, wherein the internal pressure of the supply path and the storage tank is maintained at a positive pressure. 3. The supply path of the granular material A having an angle of repose of 35 ° or more measured by the injection method, the supply path of the granular material B of the thermoplastic resin, the powder B is melted and kneaded with the granular material A, and the die And a storage tank connected to the supply path of the granular material B and the extruder, a regulation hood for the granular material B is provided in the storage tank, Disposed below the upper end of the connecting portion between the supply path of the granular material B and the storage tank, and arranged such that the horizontal projection surface at the end of the supply path of the granular material A is inside the regulating hood. Thermoplastic fiber melt spinning apparatus. The melt spinning apparatus according to claim 3, wherein the entire periphery of the end of the supply path of the powder A is disposed in a space above the upper surface of the powder B inside the regulating hood. 5. The melt spinning apparatus according to claim 3, wherein the entire periphery of the end of the supply path of the granular material A is disposed above the entire periphery of the end of the regulating hood. The supply path of the granular material A having an angle of repose of 35 ° or more measured by the injection method, the supply path of the granular material B of the thermoplastic resin, the powder B is melted and kneaded with the granular material A, and the die A supply passage of the granular material B and a storage tank communicating with the extruder, and a cylindrical regulation hood of the granular material B provided in the storage tank, A melt spinning apparatus for thermoplastic resin fibers, which is disposed so as to satisfy all of the following (i) to (iii):
(I) The whole circumference of the lower end of the regulated hood is below the upper end of the connecting portion of the powder B supply path and the storage tank. (Ii) The vertical projection plane at the lower end of the supply path of the granular A is the regulated hood. (Iii) The horizontal projection plane at the lower end of the supply path of the granular material A is inside the horizontal projection plane of the regulating hood. The melt spinning apparatus according to any one of claims 3 to 6, wherein a sealing mechanism is provided between an outer peripheral surface of the supply path of the granular material A and a storage tank. The melt spinning apparatus according to any one of claims 3 to 7, wherein the regulation hood and the supply path of the granular material A have an integral structure. A second restriction hood that prevents the powder B from coming into contact with the restriction hood is provided outside the restriction hood, and the second restriction hood end circumference is disposed below the restriction hood end circumference. The melt spinning apparatus according to any one of claims 3 to 8, wherein: The melt spinning apparatus according to any one of claims 3 to 9, wherein the supply path of the powder A is split into at least two or more.

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