JP5966741B2 - Fine powder charging method and container - Google Patents

Description

  The present invention relates to a fine powder charging method and a storage container. More specifically, the present invention relates to a fine powder injection that can be quickly discharged from a storage container and charged into a receiving container while suppressing the scattering of the fine powder to the surroundings. It relates to a method and its container.

  In recent years, as the weight of sealing materials has been reduced, handling in the production process of organic micro hollow balloons as raw materials has become difficult. Specifically, when an organic micro hollow balloon having a very low specific gravity is introduced into the mixing kettle, there is a problem that the balloon is scattered around and the surroundings are soiled. In addition, since this balloon is light in weight, it cannot be smoothly discharged from the storage container, and if the container is vigorously shaken to promote discharge, a vicious cycle occurs in which the balloon is further scattered around. Such a problem occurs not only when an organic micro hollow balloon is used, but also when a light micro powder is introduced.

  For example, as a powder container, a structure in which the inner surface of the container is surface-treated or a cloth body to which a weight is attached is provided so that the powder particles to be stored are difficult to adhere to the inner surface of the container and are smoothly discharged. Is known (see Patent Document 1). However, in these known storage containers, it was difficult to discharge smoothly in the case of a very light fine powder.

JP-A-8-230957

  An object of the present invention is to provide a charging method of a fine powder that can be quickly discharged from a storage container and charged into a receiving container while suppressing the scattering of the fine powder to the surroundings, and the storage container.

  In order to achieve the above object, the fine powder charging method of the present invention is such that the upper end opening edge of the bottomed cylindrical resin bag body is folded back to the outer peripheral side and positioned below the bottom of the bag body. The body has a double structure of an outer peripheral portion and an inner peripheral portion, and after accommodating the fine powder inside the inner peripheral portion, the upper end portion of the inner peripheral portion and the upper end portion of the outer peripheral portion are closed together, The upper end opening edge located below the bottom of the bag body is closed to form a storage container in which fine powder is sealed, and the storage container is turned upside down and suspended above the receiving container. Then, in this state, the sealed upper portion of the inner peripheral portion and the upper end portion of the outer peripheral portion, which are located at the lower end portion of the container, are opened, and the sealed fine powder is placed in the receiving container. It is characterized by being introduced into

  Further, the container for fine powder of the present invention is such that the upper end opening edge of the bottomed cylindrical resin bag body is folded back to the outer peripheral side and positioned below the bottom part of the bag body, The fine powder contained inside the inner peripheral portion is sealed by closing the upper end portion of the inner peripheral portion and the upper end portion of the outer peripheral portion together. The upper end opening edge located below the bottom of the bag body is closed.

  According to the present invention, the upper end opening edge of the bottomed cylindrical resin bag body is folded back to the outer peripheral side to form a double structure of the outer peripheral portion and the inner peripheral portion, and the fine powder accommodated inside the inner peripheral portion However, the upper end portion of the inner peripheral portion and the upper end portion of the outer peripheral portion are sealed together, and the upper end opening edge located below the bottom portion of the bag body is closed. Since it is a container, the container is turned upside down and suspended, and the upper end of the closed inner periphery and the upper end of the outer periphery are opened above the receiving container. A smooth slip occurs between the outer peripheral portion and the outer peripheral portion, and the fine powder that is hermetically sealed moves downward together with the inner peripheral portion of the bag body, and the fine powder falls in a lump shape. Therefore, it is possible to quickly discharge the sealed fine powder from the storage container and put it into the receiving container while suppressing the scattered fine powder from being scattered around.

  Here, if the upper end opening edge located below the bottom part of the bag body is closed by forming a ring-shaped body together with its peripheral portion, a hanging tool can be hooked on the ring-shaped body. Therefore, it is convenient to make the storage container be turned upside down and suspended.

  When the film thickness of the bag body is 0.05 mm or more and 0.2 mm or less, wrinkles can be hardly generated while ensuring the strength of the bag body. As a result, when the storage container is turned upside down and suspended and the upper end portion of the inner peripheral portion and the upper end portion of the outer peripheral portion closed above the receiving container are opened, the inner peripheral portion and the outer peripheral portion are opened. It is easy to ensure a smooth slip between the two.

  In addition, if the inner surface of the bag body is subjected to antistatic treatment, it is possible to prevent the fine powder caused by static electricity from adhering to the bag body, so that the fine powder sealed in the container can be quickly discharged from the container. Is even more advantageous.

It is explanatory drawing which illustrates the bag body which comprises the storage container of this invention. It is explanatory drawing which illustrates the state which turned up the upper end opening edge of the bag body of FIG. 1 to the outer peripheral side, and formed the double-structure bag body. It is explanatory drawing which illustrates the storage container of this invention which sealed fine powder. It is explanatory drawing which illustrates the state which turned the storage container of FIG. 3 upside down, and was moved above the receiving container. It is explanatory drawing which illustrates the state which has injected | thrown-in to the container which received the fine powder sealed in the storage container of FIG. It is explanatory drawing which illustrates the storage container after throwing in fine powder.

  Hereinafter, a method for charging fine powder and a container according to the present invention will be described based on the embodiments shown in the drawings.

  The container 1 for fine powder of the present invention illustrated in FIG. 3 (hereinafter referred to as the container 1) includes a bottomed cylindrical resin bag 2 illustrated in FIG. 1 as a constituent member. The bag body 2 has an upper end opening edge 3 at the upper end and a bottom portion 4 closed at the lower end. As the material of the bag body 2, various resin materials such as PE, PP, EVA, PVC, and LDPE can be adopted.

  The size of the bag body 2 is, for example, an outer diameter of about 0.5 m to 2.0 m and a capacity of about 10 L to 500 L. The film thickness of the bag body 2 is, for example, 0.03 mm to 3.0 mm, and 0.05 mm to 2.0 mm is particularly preferable.

  When forming the container 1, first, the upper end opening edge 3 of the bag body 2 is folded back to the outer peripheral side. Next, as shown in FIG. 2, the folded upper end opening edge 3 is positioned below the bottom portion 4 of the bag body 2, so that the bag body 2 has a double structure of the outer peripheral portion 2 a and the inner peripheral portion 2 b. To do.

  Next, the fine powder P is accommodated inside the inner peripheral portion 2b. The fine powder P is, for example, a powder having a true specific gravity of 0.05 g / L or more and 0.20 g / L or less and a particle diameter of 20 μm to 60 μm. Specific examples of the fine powder P include cell-forming resin fine powders such as organic fine hollow balloons and fumed silica. Examples of the resin material of the cell-forming resin fine powder include acrylonitrile resin. As the organic micro hollow balloon, there are those alone or coated with an inorganic filler. Examples of the inorganic filler include calcium carbonate, titanium oxide, silicon oxide, talc, clay, and carbon black.

  After accommodating the fine powder P inside the inner peripheral portion 2b, the upper end portion of the inner peripheral portion 2b and the upper end portion of the outer peripheral portion 2a are closed together as illustrated in FIG. For example, these upper ends are converged together and closed by the string-like closing member 5a. An adhesive or the like can be poured into the upper end portion of the inner peripheral portion 2b and the upper end portion of the outer peripheral portion 2a to close them together.

  Furthermore, the upper end opening edge 3 positioned below the bottom portion 4 of the bag body 2 is closed to form the container 1 in which the fine powder P is sealed. For example, the upper end opening edge 3 is converged, and the upper end opening edge 3 is closed by the string-like closing member 5b. It is also possible to close the upper end opening edge 3 by pouring an adhesive or the like.

  Here, when closing the upper end opening edge 3 positioned below the bottom 4 of the bag body 2, as illustrated in FIG. 3, the ring-shaped body 3 a is formed at the peripheral portion together with the upper end opening edge 3. It can also be closed.

  The fine powder P hermetically housed in the container 1 is put into a receiving container 7 (for example, a mixing pot) for mixing with other materials, for example. Therefore, as illustrated in FIG. 4, the container 1 is turned upside down and suspended and moved above the receiving container 7. The lower end of the receiving container 1 is positioned below the upper end opening of the receiving container 7.

  For example, a hanging tool 6 such as a crane is hooked on the ring-shaped body 3a to hang the container 1 upside down. If the ring-shaped body 3a is formed in this manner, the hanging tool 6 can be hooked, which is convenient for turning the storage container 1 upside down and hanging.

  Next, in this state, the upper end portion of the inner peripheral portion 2b and the upper end portion of the outer peripheral portion 2a, which are located at the lower end portion of the container 1 and are closed first, are opened. In this embodiment, the closing member 5a is opened and opened.

  By this opening operation, as illustrated in FIG. 5, the entire mass of the sealed fine powder P acts on the inner peripheral portion 2 b, so that the inner peripheral portion 2 b can be smoothly moved with respect to the outer peripheral portion 2 a. By sliding, the fine powder P moves downward together with the inner peripheral portion 2b. That is, the fine powder P falls in a lump shape. Therefore, the fine powder P sealed in the receiving container 1 is quickly discharged from the receiving container 1 and put into the receiving container 7 while being prevented from being scattered around the receiving container 7. Since the fine powder P is not scattered around, it is easy to ensure a good working environment. In addition, a suction device for sucking the scattered fine powder P becomes unnecessary, or the suction performance of the suction device can be lowered.

  The film thickness of the bag body 2 is, for example, 0.05 mm or more and 0.2 mm or less. When the film thickness is 0.05 mm or more, it becomes easy to ensure a certain level of strength that does not hinder the handling of the bag body 2. Moreover, since wrinkles are likely to occur if the film thickness of the bag body 2 is too thin or too thick, wrinkles are less likely to occur when the film thickness is 0.05 mm or more and 0.2 mm or less. If the bag body 2 has wrinkles, the inner peripheral portion 2b becomes difficult to slide smoothly with respect to the outer peripheral portion 2a. Therefore, in order to smoothly discharge the fine powder P sealed in the storage container 1, the film thickness of the bag body 2 is set to be small. It is advantageous that the thickness is 0.05 mm or more and 0.2 mm or less.

  The inner surface of the bag body 2 can be subjected to antistatic treatment. The sealed fine powder P may adhere to the inner peripheral portion 2b due to static electricity, but if antistatic treatment is applied, the fine powder P is prevented from adhering to the bag body 2 (mainly the inner peripheral portion 2b). it can. By performing this treatment, it is more advantageous to quickly discharge the fine powder P sealed in the storage container 1 from the storage container 1.

DESCRIPTION OF SYMBOLS 1 Storage container 2 Bag body 2a Outer peripheral part 2b Inner peripheral part 3 Upper end opening edge 3a Ring-shaped body 4 Bottom part 5a, 5b Closure member 6 Hanging tool 7 Receptacle container P Fine powder

Claims (7)

  By folding the upper end opening edge of the bottomed cylindrical resin bag body to the outer peripheral side and positioning it below the bottom part of the bag body, this bag body has a double structure of the outer peripheral part and the inner peripheral part, After accommodating the fine powder inside the inner peripheral portion, the upper end edge of the inner peripheral portion and the upper end portion of the outer peripheral portion are both closed, and an upper end opening edge positioned below the bottom portion of the bag body is provided. The container is closed to form a container sealed with fine powder, the container is turned upside down and suspended and moved above the receiving container, and then in this state is positioned at the lower end of the container. A method for charging a fine powder, comprising: opening an upper end portion of the closed inner peripheral portion and an upper end portion of the outer peripheral portion, and putting the sealed fine powder into the receiving container.   When closing the upper end opening edge positioned below the bottom of the bag body, a ring-shaped body is formed in the peripheral portion together with the upper end opening edge, and the container is closed by hooking a hanger to the ring-shaped body. The method for charging fine powder according to claim 1, wherein the powder is turned upside down and suspended.   The method for charging fine powder according to claim 1 or 2, wherein the film thickness of the bag is 0.05 mm or more and 0.2 mm or less.   The upper end opening edge of the bottomed cylindrical resin bag body is folded back to the outer peripheral side and located below the bottom part of the bag body, and this bag body is formed in a double structure of the outer peripheral part and the inner peripheral part. The fine powder contained inside the inner peripheral portion is sealed by closing the upper end portion of the inner peripheral portion and the upper end portion of the outer peripheral portion, and is positioned below the bottom portion of the bag body. A container for storing fine powder, characterized in that the upper end opening edge is closed.   The container for containing fine powder according to claim 4, wherein an upper end opening edge located below the bottom of the bag body is closed by forming a ring-shaped body together with a peripheral portion thereof.   The container for fine powder according to claim 4 or 5, wherein the bag body has a film thickness of 0.05 mm or more and 0.2 mm or less.   The container for fine powder according to any one of claims 4 to 6, wherein an inner surface of the bag body is subjected to antistatic treatment.

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