JP2012081990A - Glass paste packaging bag and method of controlling the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the amount of foreign matter mixed in glass paste filled in a glass paste packaging bag as much as possible.SOLUTION: The glass paste packaging bag 1 includes a bag body 2 having a cylindrical mouth portion 3 as an entrance of the glass paste G in an upper part, and a lid portion 4 for opening and closing the cylindrical mouth portion 3, and the glass paste G is filled in the inside of the bag body 2 through the cylindrical mouth portion 3. In a state before filling of the glass paste G, the number of the foreign matter in the inside of the bag body 2 is controlled to be 0.3/L or less.

Description

  The present invention relates to a glass paste packaging bag in which glass paste is filled and a management method thereof.

  One of the typical flat displays that have been put into practical use in recent years is a plasma display panel (hereinafter referred to as PDP). A PDP is composed of many members obtained by firing powder glass, and several types of glass pastes are used for its production. Generally, a glass paste supplied to a PDP production line is obtained by dispersing glass powder having predetermined characteristics such as a melting point and an expansion coefficient in a solvent containing a resin such as a binder.

  This glass paste is contained in a container such as a metal drum can in a state filled in a resin packaging bag, and shipped from a glass paste manufacturer to a PDP manufacturer.

  This type of glass paste packaging bag opens and closes the bag body with a glass paste doorway at the top and the door for the purpose of suppressing the scattering of glass paste during filling and air bubbles in the glass paste. For example, see Patent Document 1 (Japanese Patent Application Laid-Open No. 2003-26083).

JP 2009-23687 A

  Incidentally, in recent years, in the field of PDPs, the actual situation is that the resolution of display images has been increased due to the support for full high-definition and the like. For this reason, in the manufacturing process of the PDP, severe restrictions are imposed on the amount of foreign matter mixed in structures such as ribs (partition walls) and dielectric layers manufactured by glass paste. In other words, in ribs and dielectric layers manufactured from glass paste, as the resolution is increased, it is necessary to reduce the width of the ribs and reduce the thickness of the dielectric layers, and the dimensional accuracy is also stricter. It has become a thing. For this reason, even if the glass paste contains a foreign material of a size that would not be a problem if it was previously used, the foreign material is exposed to the outside of the rib or dielectric layer, and the rib width or the thickness of the dielectric layer is reduced. It can be a cause of madness. Therefore, in order to keep the structures such as ribs and dielectric layers made of glass paste with high quality, it is indispensable to reduce foreign substances contained in the glass paste as much as possible.

  However, in the hermetically sealed glass paste package as disclosed in Patent Document 1, no positive measures have been taken to reduce the amount of foreign matter mixed in the glass paste filled therein, and In fact, the main cause of contamination is not clarified.

  In view of the above circumstances, an object of the present invention is to reduce as much as possible the amount of foreign matter contained in the glass paste filled in the glass paste packaging bag.

  As a result of intensive research, the inventors of the present application have found that the main cause of foreign matter mixing in the glass paste is the state of the glass paste packaging bag before the glass paste is filled, and if the state is strictly controlled, the glass The knowledge that the contamination of the paste can be reduced was obtained. In other words, glass paste packaging bags are usually manufactured through processing processes such as welding and cutting in a general environment, so that foreign substances in the atmosphere (such as fine pieces of fibers and resins, etc.) ) Enters the inside of the packaging bag and easily mixes into the glass paste to be filled later. Therefore, these foreign matters are the main cause of foreign matters mixed in the glass paste to be filled. Therefore, if the state of the glass paste packaging bag before being filled with the glass paste is strictly managed, the above-described knowledge that foreign matters can be reduced in the glass paste can be obtained.

  That is, a glass paste packaging bag according to the present invention, which was created to solve the above problems, includes a bag body having a glass paste inlet / outlet at an upper part thereof, and a lid member for opening / closing the inlet / outlet, and the glass paste Is a glass paste packaging bag filled into the bag body through the doorway, and the number of foreign matters inside the bag body is 0.3 or less per liter in the state before filling the glass paste. It is characterized by being. Here, “foreign matter” means a thing that can be supplemented by a wire mesh of # 635, and anything that passes through the wire mesh is excluded from the foreign matter. In addition to foreign matter adhering to the inner surface of the bag body, the foreign matter includes those floating away from the inner surface of the bag body and in the internal space. The same shall apply hereinafter.

  According to such a configuration, since the number of foreign matters in the bag body of the glass paste packaging bag is appropriately reduced, it is possible to reliably reduce the ratio of foreign matters mixed into the glass paste filled therein.

  Said structure WHEREIN: It is preferable that the said glass paste is utilized for manufacture of PDP.

  That is, in the case of the glass paste packaging bag according to the present invention, as described above, since the number of foreign matters inside the bag body before filling the glass paste is strictly controlled, the glass paste used for manufacturing the PDP is used. Thus, even if it is a glass paste in which the mixing of foreign substances is severely restricted, it is possible to ensure the required quality without problems.

  Moreover, the management method of the glass paste packaging bag according to the present invention, which was created to solve the above problems, includes a bag body having a glass paste inlet / outlet at the top, and a lid for opening / closing the inlet / outlet, A method of managing a glass paste packaging bag in which the glass paste is filled into the bag body through the doorway, wherein the number of foreign matters inside the bag body is 0.3 before the glass paste is filled. It is characterized in that the inside of the bag body is washed so as to be equal to or less than 1 / liter.

  According to such a method, since the number of foreign matters inside the bag body is controlled within the above numerical range by cleaning, it can be enjoyed in the same manner as described above.

  As described above, according to the present invention, since the number of foreign matters inside the bag body of the glass paste packaging bag filled with the glass paste is appropriately managed, the amount of foreign matters contained in the glass paste can be reduced as much as possible. Can be reduced.

It is a longitudinal cross-sectional view which shows the whole structure of the glass paste packaging bag which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view which shows the glass paste package provided with the glass paste packaging bag shown in FIG. It is a longitudinal cross-sectional view which shows the glass paste extraction process at the time of using the glass paste packaging bag shown in FIG. It is the schematic of the washing | cleaning apparatus which wash | cleans the inner surface of the bag main body of the glass paste packaging bag shown in FIG. It is a flow of the washing | cleaning process by the washing | cleaning apparatus shown in FIG. It is the schematic of the washing | cleaning apparatus which wash | cleans the outer surface of the bag main body of the glass paste packaging bag shown in FIG.

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

  FIG. 1 is a longitudinal sectional view of a glass paste packaging bag (hereinafter also simply referred to as a packaging bag) according to an embodiment of the present invention. The packaging bag 1 includes a bag main body 2, a cylindrical mouth portion 3 fixed to the bag main body 2 and forming an entrance for filling and taking out the glass paste G in the bag main body 2, and an upper end opening of the cylindrical mouth portion 3. And a lid 4 that opens or closes.

  The bag body 2 has a substantially uniform thickness as a whole, and has a shape with its upper and lower ends closed. In this embodiment, the bag body 2 has a shape in which the upper part of the cylindrical body part 2a is closed by the top part 2b and the lower part of the body part 2a is closed by the bottom part 2c.

  Among these, the top part 2b has the outer diameter part 2b1 used as the uppermost end part of the top part 2b, and the center part 2b2 located in the radial direction center and the downward direction rather than the outer diameter part 2b1. The outer diameter portion 2b1 and the central portion 2b2 are connected by an annular inclined portion 2b3 that is inclined downward from the outer diameter portion 2b1 to reach the central portion 2b2. And the lower end part of the cylindrical opening | mouth part 3 is adhering to the upper surface of the center part 2b2. Thereby, the opening lower end of the cylindrical mouth part 3 is located below the outer diameter part 2b1 of the top part 2b.

  Further, as shown by the broken line in FIG. 1, the inclined portion 2b3 can be deformed so as to be inclined upward from the outer diameter portion 2b1 to reach the central portion 2b2, and when the glass paste G is filled, the inclined portion 2b3 By deforming, the lower end opening of the cylindrical mouth portion 3 can be displaced to a position above the outer diameter portion 2b1. A spiral groove 3a is formed on the outer peripheral surface of the cylindrical mouth portion 3, and the lid portion 4 can be screwed.

  On the other hand, the bottom 2c has an inner diameter reduced region 2c1 extending from the body 2a and a bottom 2c2 connected to the inner diameter reduced region 2c1. The inner diameter reduction region 2c1 is a portion that extends downward with a reduced diameter from the lower end of the body portion 2a, and is connected to the bottommost portion 2c2 that is positioned at the bottom of the bottom portion 2c of the bag body 2.

  Here, the inclination angle θ of the inner diameter reduction region 2c1 with respect to the bottom 2c2 can collect the glass paste G on the inner diameter reduction region 2c1 in the bottom 2c2 and suck it out with the glass paste suction nozzle 9 illustrated in FIG. It is set to a size of about.

  The material of the bag body 2 is preferably a material that does not easily react with the glass paste G. For example, a resin such as polyethylene or nylon is used. On the other hand, a material harder than the bag body 2 is used as the material of the cylindrical mouth portion 3 and the lid portion 4. Specifically, for example, hard polyethylene or hard nylon is used.

  The packaging bag 1 having the above-described configuration is packed, for example, in the form shown in FIG. Here, the glass paste package 8 shown in the figure includes a glass paste packaging bag 1 filled with a glass paste G, a metal drum can 5 containing the glass paste packaging bag 1, and a bottom portion 5a of the drum can 5. And a buffer body 6 that receives the glass paste packaging bag 1 and a metal upper lid 7 that closes the upper opening of the drum can 5. Among them, the buffer body 6 is formed of a material such as foamed resin, for example, in a shape corresponding to the inner surface of the drum can 5, and has a receiving surface 6 a that receives the bottom of the glass paste packaging bag 1 above the buffer body 6. .

  The glass paste package 8 having the above configuration is manufactured through the following procedure, for example. First, the buffer body 6 is inserted into the drum can 5 with the top opened, and then the glass paste packaging bag 1 with the lid 4 removed is accommodated in the drum can 5. Then, a glass paste filling nozzle (not shown) is inserted into the bag body 2 from the cylindrical mouth portion 3, and the glass paste G is filled into the bag body 2 from the tip of the nozzle.

  During the filling, as shown by the broken line in FIG. 1, the inclined portion 2b3 of the top portion 2b is deformed so that the lower end opening of the cylindrical mouth portion 3 is positioned above the outer diameter portion 2b1 of the top portion 2b. It is also possible to fill the glass paste G in such a state. By filling in this way, the lower end opening of the cylindrical mouth portion 3 is filled in a state positioned below the outer diameter portion 2b1 of the top portion 2b (the state shown by the solid line in FIG. 1), Air bubbles mixed in the glass paste G in the outer diameter portion 2b1 of the top portion 2b can easily escape to the cylindrical mouth portion 3 side. Therefore, the amount of bubbles mixed in the glass paste G at the time of filling can be reduced.

  Then, after the filling of the glass paste G is completed, the lid 4 closes the opening of the cylindrical mouth 3, and the drum can 5 is covered with a metal upper lid 7 to accommodate the packaging bag 1. The glass paste package 8 of the form shown in 2 is obtained.

  The package 8 is transported from a glass paste manufacturer to a PDP manufacturer. And the glass paste G with which the packaging bag 1 accommodated in the package 8 was filled is taken out, and is supplied to the manufacturing line of PDP. The glass paste G removal step is performed in the following procedure.

  As shown in FIG. 3, first, a glass paste suction nozzle 9 is inserted into the bag body 2 through the cylindrical mouth portion 3 of the glass paste packaging bag 1 with the upper lid 7 and the lid portion 4 removed. To do. At this time, the nozzle 9 may be inserted to a position where the tip opening 9 a of the nozzle 9 abuts on the bottom 2 c 2 of the bag body 2. And the pump (illustration omitted) provided in the upper opening part side of the nozzle 9 is driven, and the suction of the glass paste G with which the bag main body 2 was filled via the cylindrical opening part 3 is started. Thereby, the glass paste G is taken out in order from the bottom side of the bag main body 2, and the gas-liquid interface is gradually lowered with the suction.

  In a state where the glass paste G in the bag body 2 is sucked out to some extent, the glass paste G on the inner diameter reduction region 2c1 located on the lower side of the bag body 2 is directed to the bottom part 2c2 located on the lowermost side. And easy to slide down. Therefore, most of the glass paste G can be collected on the lowest part (bottom surface) 2c2 without leaving the glass paste G on the inner diameter reduced region (tapered surface) 2c1 as much as possible. Therefore, the glass paste G filled in the bag body 2 can be taken out efficiently and without leakage.

  And the characteristic matter of this embodiment is that the interior of the bag body 2 (internal space including the inner surface) is empty before filling the glass paste G in the glass paste packaging bag 1 having the above configuration. The number of foreign matters per unit volume (liter) is regulated to 0.3 or less. The term “foreign matter” as used herein means a thing that can be supplemented by a # 635 wire mesh, and those passing through the wire mesh are excluded from the term “foreign matter”. Specifically, for example, in the case of the packaging bag 1 including the bag body 2 having an internal capacity of 85 liters, 1 liter of pure water is injected into the bag body 2 and the inner surface of the bag body 2 is injected with the injected pure water. The cleaned pure water is passed through a # 635 wire mesh, and the number of foreign matter captured in the wire mesh is counted. Then, the number of foreign matters is divided by the internal volume (85 liters) of the bag body 2 to calculate the number of foreign matters per unit volume. For example, in the case of the bag body 2 having an internal volume of 85 liters, the number of foreign matters is preferably 20 or less, that is, approximately 0.26 pieces / liter or less.

  In this way, since the number of foreign matters in the bag body 2 of the glass paste packaging bag 1 is appropriately reduced, the proportion of foreign matters mixed into the glass paste G filled therein can be reliably reduced. it can. Therefore, even if the filled glass paste G is used in the manufacturing process of the PDP, the rate of occurrence of defects due to the inclusion of foreign substances can be greatly reduced, and the product yield can be improved.

  The number of foreign substances in the bag body 2 of the glass paste packaging bag 1 is managed by cleaning the bag body 2 before being filled with the glass paste G by a cleaning device described below.

  As shown in FIG. 4, the cleaning device 10 for cleaning the inner surface of the bag body 2 cleans the inner surface of the bag body 2 of the glass paste packaging bag 1 arranged with the cylindrical mouth 3 side facing downward. It is configured to be washed. Specifically, the cleaning device 10 supplies pure water to the cleaning nozzle 11 from outside the drawing, a cleaning nozzle 11 inserted through the cylindrical mouth portion 3, a circulating water storage tank 12 in which circulating water is stored. A pure water supply line 13, a circulating water supply line 14 that supplies the circulating water stored in the circulating water storage tank 12 to the cleaning nozzle 11, and an air supply line 15 that supplies air to the cleaning nozzle 11 from outside the figure. I have. That is, in this embodiment, pure water and circulating water supplied to the cleaning nozzle 11 are used as cleaning water for cleaning the inner surface of the bag body 2. On the other hand, the air supplied to the cleaning nozzle 11 is used for drying the inner surface of the bag body 2. The air supply line 15 can be omitted as appropriate.

  The pure water supply line 13 is provided with a filter (for example, a filter that captures foreign matters of 1 μm or more) 16, and the pure water that has passed through the filter 16 is transferred downstream. The pure water supply line 13 is branched into two on the downstream side of the filter 16, one first branch line 13a is connected to the washing nozzle 11, and the other second branch line 13b is a circulating water storage tank. 12 is connected. The branch lines 13a and 13b of the pure water supply line 13 are provided with valves 17 and 18 for opening and closing the flow path. The pure water is supplied to the pure water supply line 13 after passing through an RO membrane (reverse osmosis membrane) (not shown).

  The circulating water supply line 14 has one end connected to the circulating water storage tank 12 and the other end connected to the cleaning nozzle 11. The circulating water supply line 14 also has a pump 19 for circulating the circulating water stored in the circulating water storage tank 12 to the cleaning nozzle 11 and foreign substances contained in the circulating water stored in the circulating water storage tank 12. A filter (for example, a filter that captures foreign matters of 1 μm or more) 20 is provided for removal.

  The air supply line 15 is provided with a valve 21 for opening and closing the flow path.

  The circulating water storage tank 12 is provided with a recovery hopper 22 that recovers used washing water flowing down from the cylindrical mouth portion 3 of the bag body 2. The wash water recovered by the recovery hopper 22 passes through a # 635 wire mesh 23 disposed inside the recovery hopper 22 and is then recovered in the circulating water storage tank 12. That is, when foreign matter exists in the bag body 2, the foreign matter is captured by the wire mesh 23 and does not enter the circulating water storage tank 12. The circulating water storage tank 12 is provided with a drain line 25 whose flow path can be opened and closed by a valve 24. Moreover, in this embodiment, the upper part of the circulating water storage tank 12 is opened, and an auxiliary drain line 26 for collecting and draining water overflowing from the opening is also provided.

  Next, the operation of the cleaning apparatus 10 configured as described above will be described with reference to FIGS.

  First, pure water is supplied to the circulating water storage tank 12 through the second branch line 13b of the pure water supply line 13 and supplied to the circulating water storage tank 12 (step S1). Thereafter, the bag body 2 of the glass paste packaging bag 1 is disposed on the cleaning device 10 with the cylindrical mouth 3 facing downward (step S2). At this time, the cleaning nozzle 11 is inserted into the internal space of the bag body 2 from the cylindrical mouth portion 3. Next, the pump 19 of the circulating water supply line 14 is operated, and the circulating water in the circulating water storage tank 12 is supplied to the cleaning nozzle 11 through the circulating water supply line 14. Then, the main cleaning is performed by spraying the circulating water over substantially the entire inner surface of the bag body 2 while rotating the cleaning nozzle 11 (step S3). In this main cleaning step, the bag body 2 is cleaned by circulating the same water while removing foreign matter with the wire mesh 23 and the filter 20. Therefore, it is possible to minimize the amount of water used regardless of the length of the cleaning time.

  In this embodiment, after the main cleaning is completed, pure water is directly supplied to the cleaning nozzle 11 through the first branch line 13a of the pure water supply line 13, and the inner surface of the bag body 2 is rinsed with pure water (finishing) (Step S4). Moreover, after completion | finish of rinse washing | cleaning, air is supplied to the washing nozzle 11 through the air supply line 15, and the water adhering to the inner surface of the bag main body 2 is blown off and dried (step S5). In this case, warm air may be ejected from the cleaning nozzle 11 in order to increase the drying efficiency. And after a series of washing | cleaning processes (step S3-S5) are complete | finished in this way, the glass paste packaging bag 1 is taken out from the washing | cleaning apparatus 10 (step S6). If necessary, the glass paste packaging bag 1 taken out from the cleaning device 10 may be vacuum dried afterwards. If the cleanliness of the water stored in the circulating water storage tank 12 is maintained at the time when the glass paste packaging bag 1 is taken out from the cleaning device 10, another glass paste packaging bag 1 is continuously removed from the cleaning device 10. The steps S2 to S6 are repeated, and the plurality of glass paste packaging bags 1 are sequentially washed according to the same procedure. On the other hand, if the purity of the circulating water stored in the circulating water storage tank 12 is not maintained, the circulating water in the circulating water storage tank 12 is drained through the drain line 25 (step S7). In addition, the presence or absence of the cleanliness of circulating water is managed by the number of washing | cleaning of the glass paste packaging bag 1, etc., for example. When the circulating water in the circulating water storage tank 12 is drained, pure water is supplied to the circulating water storage tank 12 in advance when another glass paste packaging bag 1 is newly washed (step S1). .

  And the glass paste packaging bag 1 obtained through such a washing | cleaning process restrict | limits the number of the foreign materials per unit volume inside the bag main body 2 (internal space containing an inner surface) to 0.3 or less. Here, in the uncleaned glass paste packaging bag 1, the number of foreign matters per unit volume inside the bag body 2 is 3.5 to 5.9, so that the number of foreign matters is greatly reduced by washing. I can recognize that. In addition, although this inventor tried also hand-washing the inner surface of the bag main body 2 of the glass paste packaging bag 1, in this case, the number of foreign matters per unit volume is restricted to 0.3 or less. It was difficult to improve to about 0.7.

  In addition, this invention is not limited to the said embodiment, It can implement with a various form. For example, in the above-described embodiment, the case where the inner surface of the bag body 2 of the glass paste packaging bag 1 is cleaned has been described, but it is also preferable to clean the outer surface. This is because the glass paste packaging bag 1 filled with the glass paste G is often taken out of the glass paste packaging bag 1 in a clean space such as a clean room. This is because if the foreign matter adheres to the surface, the foreign matter may be scattered in the clean room or the scattered foreign matter may be mixed into the glass paste G. As the cleaning device 30 for cleaning the outer surface of the bag body 2, for example, as shown in FIG. 6, the bag body 2 is floated in a state where the bag body 2 is tilted substantially horizontally in a storage container 31 in which cleaning water is stored. An example is one in which the outer surface of the bag body 2 is washed by rotating the bag body 2 while the washing water is applied from above to the cylindrical body 2a of the bag body 2 by the nozzle 32. In the illustrated example, a cleaning tool 33 made of a sponge or the like that contacts the outer surface of the body 2 a is disposed in a storage container 31 in which cleaning water is stored, and the outer surface of the body 2 a rotated by the cleaning tool 33 is disposed. Foreign matter is reliably removed from the surface. Further, the storage container 31 is provided with a drainage line 34 so that the washing water is appropriately drained.

  Moreover, although the said embodiment demonstrated the case where the glass paste G for PDP was mainly filled and taken out, the packaging bag which concerns on this invention is a glass paste used for uses other than displays for displays other than PDP. It can also be applied to the case of filling and shipping.

  Moreover, a packaging bag is not limited to what was illustrated to the said embodiment, A various form is employable if it is a sealing type. For example, in the above-described embodiment, the top part 2b of the bag body 2 of the packaging bag 1 has been described so that the top part 2b moves up and down with deformation. It may be non-movable without adopting it. In addition, although a part of the bottom 2c of the bag body 2 of the packaging bag 1 has been described as being tapered, the bottom 2c may be flat.

DESCRIPTION OF SYMBOLS 1 Glass paste packaging bag 2 Bag main body 3 Cylindrical mouth part 4 Lid part 8 Glass paste package 10 Washing device 11 Washing nozzle 12 Circulating water storage tank 13 Pure water supply line 14 Circulating water supply line 15 Air supply line 16 Filter 22 Recovery Hopper 23 Wire mesh 25 Drain line 26 Auxiliary drain line 30 Cleaning device 31 Storage container 32 Cleaning nozzle 33 Cleaning tool 34 Drain line G Glass paste

Claims (3)

A glass paste packaging bag comprising a bag body having a glass paste doorway at an upper portion and a lid for opening and closing the doorway, wherein the glass paste is filled into the bag body through the doorway; ,
The glass paste packaging bag, wherein the number of foreign matters inside the bag body is 0.3 / liter or less before the glass paste is filled.   The glass paste packaging bag according to claim 1, wherein the glass paste is used for manufacturing a plasma display panel. A method for managing a glass paste packaging bag, comprising: a bag body having a glass paste entrance at an upper portion; and a lid for opening and closing the entrance, wherein the glass paste is filled into the bag body through the entrance. Because
Before filling the glass paste, the inside of the bag main body is cleaned so that the number of foreign matters inside the bag main body is 0.3 pieces / liter or less. .

Images