JP2011001125A - Pouch container, manufacturing method therefor, and shape-forming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pouch container which enhances the degree of freedom in the container shape, easily increases the volume of the filling volume, enhances the self-supporting stability without increasing an occupying space upon display, packaging, etc., and is excellent in space saving and handling convenience, and to provide its manufacturing method and a shape-forming method.SOLUTION: The container includes a container body 2 formed of a film 4 and a spout member 3 attached to the container body 2. The spout member 3 has a tubular part 10 and a projecting part 11. An opening 7 provided on the upper part of the container body 2 penetrates through the tubular part 10. The projecting part 11 is provided continued to the tubular part 10 and extends from the tubular part 10 toward the outside of the tubular part 10. A peripheral part of the opening 7 in the container body 2 is welded to the upper surface of the projecting part 11.

Description

  The present invention relates to a pouch container suitable for use in storing solid materials such as liquids and powders such as beverages and liquid detergents, and a manufacturing method and a shaping method thereof.

  A conventional pouch container includes a spout and a container main body to which the spout is attached. The container main body includes a front film, a rear film, gusset-shaped side films provided on the left and right sides, and a bottom film. There is one (spout pouch) formed by adhering five films and having a shape like a standing pouch (substantially triangular in a side view) (see, for example, Patent Document 1).

  In this pouch container, the upper end portions of the front film and the back film are sealed with the spout sandwiched therebetween. And since the seal part sandwiched and sealed between the front film and the back film in the spout has a boat shape instead of a circle, the sealing between the upper end portions of the front film and the back film is performed well. .

JP 2007-15708 A

  However, in the conventional pouch container, the shape of the container body is limited due to the structure in which the upper end portions of the front film and the rear film sandwiching the spout boat-shaped seal portion are sealed, and the degree of freedom of the shape is limited. There is a problem that it is difficult to raise.

  In addition, since the upper part of the container body is flat in the conventional pouch container, it is difficult to increase the filling capacity, and the pouch container itself is a flexible package that does not have strong shape retention. Therefore, it has to have a flat upper part as described above, and the space between containers widens during product display, packing, transportation, storage, etc., and the occupied space becomes large. When the width of the front and back of the bottom film is increased in order to improve the property, it becomes more remarkable.

  Furthermore, the conventional pouch container has a problem in that it is not efficient in handling because it cannot perform product display, packing, and the like in the same manner as general PET bottles that are not flexible packaging.

  The present invention has been made in view of the above circumstances, and its purpose is to increase the degree of freedom of the shape of the container and to easily increase the filling capacity. It is to provide a pouch container that can increase the self-supporting stability without increasing the occupied space at the time, and is excellent in terms of space saving and handling convenience, and a manufacturing method and a shaping method thereof. .

  In order to achieve the above object, a pouch container according to the present invention includes a container main body formed of a film and a mouth member attached to the container main body, and the mouth member is provided at an upper portion of the container main body. A cylindrical portion that is inserted through the formed opening, and a protruding portion that is connected to the cylindrical portion and extends outward from the cylindrical portion, the peripheral portion of the opening in the container body Is welded to the upper surface of the protrusion (claim 1).

  In the pouch container, the body portion of the container body includes four surfaces, each surface extends from the opening to the bottom of the container body, and a pair of surfaces facing each other among the four surfaces is the body portion. It may have a gusset part that is folded inward when the is folded.

  In the pouch container, an upper surface of the protruding portion extends substantially horizontally, and an upper portion of the trunk portion in a state where the gusset portion is folded inward is an opening edge constituting an edge of the opening. And a substantially straight corner line that forms a corner of the neck portion that narrows toward the upper side and narrows toward the upper side, and the opening edge is an intersection of the extension lines of the left and right corner lines. When a circle having the maximum outer diameter of the cylindrical portion is drawn at the center, the circle may be configured to be positioned outside the circle (Claim 3), and in this case, the opening edge is the intersection point. When a circle having an outer diameter of 102 to 140% of the maximum outer diameter of the cylindrical portion is drawn with respect to the center, it can be configured to follow this circle (claim 4). ).

  In the pouch container, the upper surface of the protruding portion may extend substantially horizontally, or may have a taper angle of 20 ° or less that extends downward (Claim 5).

  In the pouch container, a protrusion may be provided on the upper surface of the protrusion.

  In the pouch container, the bottom portion of the container body is composed of four sheet pieces that are connected to the front, rear, left, and right of the lower end of the body portion of the container body and extend toward the inside of the body portion. It is formed in a substantially symmetrical polygonal shape, and the inclination angle of the left and right edges of each sheet piece may be greater than 45 ° and 60 ° or less.

  In this case, the sheet pieces can be formed in an isosceles triangle shape having the same size.

  On the other hand, in order to achieve the above object, the method for producing a pouch container according to the present invention is characterized in that the other end of the pouch container is made of a film and has an opening at one end and the other end is opened. The mouth member is inserted into the sheet body from the side, and the cylindrical portion of the mouth member protrudes from the opening to the outside of the sheet body. The peripheral edge portion of the opening in the sheet body is welded to the upper surface of the projecting portion extending outward from the cylindrical portion, and the other end side of the sheet body is closed (Claim 9).

  In the method for manufacturing the pouch container, the upper surface of the protruding portion may extend substantially horizontally, or may have a taper angle of 20 ° or less that extends downward (Claim 10).

  In the method for manufacturing the pouch container, a convex portion may be provided on the upper surface of the protruding portion.

  In the method for manufacturing a pouch container, a gusset portion that is folded inward when the sheet body is folded is provided on the left and right sides of the sheet body, and when the folded sheet body is unfolded, the sheet body The lower part of the folded sheet body is formed in a substantially left-right symmetrical polygonal shape so that the lower part forms a bottom part, and the inclination angle of both right and left edges is greater than 45 ° and 60 ° or less, Further, the lower peripheral edge of the folded sheet body may be joined (claim 12).

  On the other hand, in order to achieve the above object, the method for shaping a pouch container according to the present invention is the pouch container according to any one of claims 2 to 4 or any one of claims 9 to 12. A preheating process and a blowing process are performed on the pouch container obtained by the method for manufacturing a pouch container described in (13).

  In the method for shaping a pouch container, the preheating step can be performed using a heating means for heating the pouch container from the outside of the pouch container.

  In the method for shaping a pouch container, the preheating step may be performed by circulating a heating fluid in the pouch container.

  In the method for shaping the pouch container, the blowing step may include a pre-blowing step and a main blowing step for increasing the internal pressure of the pouch container more than the pre-blowing step.

  In the method for shaping a pouch container, the blowing step may be performed in a state where the pouch container is placed in a mold and adjusting the temperature of the mold.

  In the inventions according to claims 1 to 17, the degree of freedom of the container shape can be increased, the amount of filling capacity can be easily increased, and the occupied space at the time of display or packing can be increased. The self-supporting stability can be improved without being accompanied, and furthermore, a pouch container excellent in space saving and handling convenience, a manufacturing method thereof, and a shaping method can be obtained.

  That is, in the invention according to claims 1, 2, 5, 9, and 10, the configuration in which the upper surface of the protruding portion of the mouth member and the peripheral portion of the opening of the container body are welded improves the degree of freedom of the container shape. Since the container body can have a three-dimensional shoulder, it is easy to increase the filling capacity, and in addition, a plurality of containers can be arranged without leaving a gap between containers as in general PET bottles. Therefore, a pouch container excellent in space saving and handling convenience can be obtained, and this pouch container has a simple configuration and can be easily manufactured at low cost.

  In the inventions according to claims 3 and 4, when the cylindrical part of the mouth member is inserted into the opening of the container main body in order to join the container main body and the mouth member, there is a gap between the cylindrical part and the opening. Therefore, the cylindrical portion can be easily inserted, and the insertion operation can be performed reliably.

  Furthermore, in the inventions according to claims 6 and 11, the accuracy of welding of the peripheral portion of the opening to the upper surface of the protrusion is greatly improved by the convex portion provided on the upper surface of the protrusion.

  Moreover, in the inventions according to claims 7, 8, and 12, the center portion of the bottom portion of the container body is positioned above the peripheral portion (grounding portion) of the bottom portion, thereby improving the self-supporting stability of the pouch container. Unlike the conventional pouch containers described above, the space occupied by the pouch containers at the time of display, packing, etc. does not increase with the improvement of the self-supporting stability.

  In the inventions according to claims 13 to 17, the shapeability of the pouch container can be improved, and it becomes easy to obtain a pouch container having a desired shape.

It is a front view which shows roughly the structure of the pouch container which concerns on one embodiment of this invention. It is the sectional view on the AA line of FIG. It is a perspective view which shows roughly the structure of the four films which form the container main body of the said pouch container. It is a perspective view which shows roughly the state which gave the sealing process to the said 4 film. It is a perspective view which shows roughly the state which performed the trimming process to some members shown in FIG. FIG. 6 is a perspective view schematically showing a process of attaching a spout to the member shown in FIG. 5. FIG. 7 is a perspective view schematically showing a state after the step of FIG. 6. It is a perspective view which shows roughly the state which performed the sealing process to the member shown in FIG. It is a perspective view which shows roughly the structure of the said pouch container obtained by performing the trimming process on the remainder of the member shown in FIG. It is a perspective view which shows roughly the structure of the said pouch container of the state with which the content was filled. It is a longitudinal cross-sectional view which shows schematically the structure of the principal part of the said pouch container. It is a longitudinal cross-sectional view which shows schematically the structure of the modification of the principal part of the said pouch container. It is a partial expanded front view which shows roughly the structure of the folding state of the modification of the bottom part of the said pouch container. It is a partial expanded explanatory view which shows roughly the structure of the filling state of the modification of the bottom part of the said pouch container. It is a perspective view which shows roughly the structure of the modification of the said 4 film. FIG. 16 is a perspective view schematically showing a configuration of a pouch container according to a modification of the present invention formed using the four films shown in FIG. 15. It is a bottom view which shows roughly the structure of the pouch container shown in FIG. It is explanatory drawing which shows schematically the structure of the principal part of the member shown in FIG. (A)-(C) are explanatory drawings which show roughly the shaping method of the pouch container which concerns on one embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, FIGS. 1, 2 and 10 schematically show the configuration of a pouch container according to an embodiment of the present invention, and FIGS. 3 to 9 show the manufacture of the pouch container according to an embodiment of the present invention. The method is shown, and the structure of the main part of the pouch container is schematically shown in FIG.

  A pouch container 1 shown in FIGS. 1, 2, and 10 includes a container main body 2 and a mouth member (hereinafter referred to as a spout) 3 attached to the container main body 2. And this pouch container 1 can be shape | molded with the manufacturing method (henceforth "manufacturing method") of the pouch container shown in FIGS. 3-10, First, this manufacturing method is demonstrated.

  The manufacturing method includes the following steps (1) to (5).

  (1) Four sheets of the same size and shape (rectangular in this example) 4A-4D (hereinafter simply referred to as film 4 if not paying attention to the individuality of each film 4A-4D), FIG. Arrange as shown in FIG.

  That is, between the two films 4A and 4B, the two films 4C and 4D bent to form the gusset portion are arranged side by side so that the bent portions are inside.

  Here, each film 4 is a laminate film made up of a plurality of films, and is formed, for example, by laminating a film forming a base material layer, a film forming a sealant layer, and the like. In addition, according to the content (accommodation object) of the pouch container 1, you may laminate | stack the film which makes a gas barrier layer, and you may comprise the film 4, and in this way about the structure of each layer of the film 4, and those combinations Changes may be made as appropriate.

  (2) It becomes the trunk | drum 5 (refer FIG. 2) of the trunk | drum (side wall part) 5 and the bottom part (bottom wall part) 6 which comprise the container main body 2 to the four films 4 arrange | positioned as mentioned above. In order to form a portion, a sealing process (heat sealing in this example) and a trimming process are performed (see FIGS. 4 and 5).

  As a result, as shown in FIG. 6, a substantially bag-shaped (or substantially cylindrical) sheet body 8 made of four films 4 and having an opening 7 on one end side and an opening on the other end side is formed. In other words, the sealing process is a process for joining four separate films 4 into a substantially bag shape (substantially cylindrical). By this sealing process, the four films 4 are sealed. Portion 9 is formed. In addition, the trimming process is a process for removing an extra portion connected to the outside of the portion that becomes the body portion 5 of the container body 2 from the four films 4 arranged as described above. In this example, the trimming process is performed after the sealing process, but this procedure may be reversed.

  (3) As shown in FIG. 6, the sheet body 8 is opened, the spout 3 is inserted into the sheet body 8 from the other open end, and the cylindrical portion 10 of the spout 3 is projected from the opening 7 ( (See FIG. 7).

  That is, as shown in FIGS. 1, 2, 6, and 7, the spout 3 is connected to the cylindrical portion 10 through the opening 7 and the cylindrical portion 10 so that the spout 3 extends from the cylindrical portion 10 to the cylindrical shape. And a protruding portion 11 extending outward from the portion 10. A screw portion 10a (see FIG. 2) to which the lid 12 is detachably attached is provided on the upper portion of the tubular portion 10.

  In addition, the cylindrical portion 10 is configured to be able to be inserted into the opening 7, whereas the protruding portion 11 is configured to abut against the periphery of the opening 7 so as not to pass through the opening 7. And this protrusion part 11 is provided in a row by the lower end part of the cylindrical part 10, for example, the protrusion width | variety is 3 mm or more, and the upper surface is extended substantially horizontally.

  (4) As shown in FIG. 7, with the cylindrical portion 10 of the spout 3 protruding from the opening 7 (see FIG. 6) to the outside of the sheet body 8, the peripheral portion of the opening 7 of the sheet body 8 is the protruding portion. In order to weld to the upper surface of 11, a sealing process (in this example, heat sealing) is performed.

  Here, as shown in FIGS. 6 and 11, since a plurality of convex portions (annular protrusions in this example) 13 are provided on the upper surface of the protruding portion 11, the peripheral portion of the opening 7 is welded to the upper surface of the protruding portion 11. The accuracy will be greatly improved. In addition, the spout 3 is shape | molded with resin for enabling the said welding.

  (5) In order to fold the other end side of the sheet body 8 to which the spout 3 is attached and form a portion that becomes the bottom portion 6 of the container body 2, a sealing process (heat sealing in this example) and a trimming process are performed (FIG. 8, see FIG.

  Thereby, the pouch container 1 shown in FIGS. 9 and 10 is formed. That is, the sealing process is a process for joining and closing the other end of the opened sheet body 8 to form the bottom portion 6, and the sealing portion 14 is formed on the sheet body 8 by this sealing process. The Further, the trimming process is a process for removing, from the sheet body 8, an extra portion that continues to the outside of the portion that becomes the bottom portion 6 of the container body 2. In this example, the trimming process is performed after the sealing process, but this procedure may be reversed.

  Thus, the manufacturing method is completed. And the pouch container 1 obtained by the said manufacturing method improves the freedom degree of a container shape by the structure which welds the protrusion part 11 of the spout 3 and the opening 7 peripheral part of the container main body 2, and also the container main body 2 is three-dimensionally In addition to being able to easily increase the filling capacity, a plurality of pouch containers 1 can be formed without leaving a gap between the pouch containers 1 as in general PET bottles. Since they can be arranged, they are excellent in space saving and handling convenience.

  In addition, the pouch container 1 obtained by the above manufacturing method is such that the central portion of the bottom portion 6 of the container body 2 is placed from the peripheral portion (grounding portion) of the bottom portion 6 in a state where the contents are filled as shown in FIGS. Is also configured to be positioned upward.

  More specifically, the bottom portion 6 of the container body 2 is connected to the front, rear, left and right of the lower end of the body portion 5 of the container body 2 and extends toward the inside of the body portion 5 and is joined to each other, as understood from the manufacturing method. It can be said that it consists of four sheet pieces 15 (see the portion surrounded by the one-dot chain line and the seal portion 14 in FIG. 9). Then, the four sheet pieces 15 are formed in an isosceles triangular shape (an example of a substantially symmetrical polygonal shape) having the same size, and the inclination angles (horizontal axes (FIG. 9) of the left and right edges of each sheet piece 15 are formed. Since the angle) θ is greater than 45 degrees and less than or equal to 60 degrees, the vertical length L of each sheet piece 15 is the state in which the container body 2 is swollen (filled state) ), The distance from the continuous position of the sheet piece 15 with respect to the lower end of the body portion 5 (see the one-dot chain line in FIG. 9) to the central axis extending in the vertical direction of the container body 2 is longer.

  In other words, as shown in FIG. 8, the sheet body 8 obtained through the step (4) is provided with gusset portions 4C and 4D which are folded inward when the sheet body 8 is folded, as shown in FIG. In the step (5), the folded sheet member 8 is formed such that the lower part (four sheet pieces 15) forms the bottom part 6 when the folded sheet member 8 is unfolded. The lower part of the body 8 is formed in an isosceles triangle shape, the inclination angle θ of both left and right edges is set to be greater than 45 ° and 60 ° or less, and the lower peripheral edge of the folded sheet body 8 is joined. . At this time, the longitudinal length L (see FIG. 9) of the lower portion of the sheet body 8 is longer than half the lateral width of the unfolded gusset portions 4C and 4D.

  Since the bottom portion 6 is configured as described above, when the pouch container 1 is in an inflated state (filled state), the entire bottom portion 6 does not spread horizontally, and the central portion of the bottom portion 6 is more than the peripheral portion. It will protrude downward. And by pushing up the center part of the bottom part 6, the center part of the bottom part 6 can be located above the peripheral part (grounding part) of the bottom part 6 (refer FIG. 2), By doing in this way, display The self-standing stability of the pouch container 1 can be improved without increasing the occupied space of the pouch container 1 during packaging and the like.

  Further, in the pouch container 1 obtained by the above manufacturing method, the body 5 of the container body 2 is composed of four surfaces, and each surface extends from the opening 7 to the bottom of the container body 2 and faces each other among the four surfaces. Each of the pair of surfaces has a gusset portion (see FIGS. 9 and 10). As shown in FIGS. 9 and 18, the upper portion of the body portion 5 that is folded so that the gusset portion is folded inward includes an opening edge 16 that forms an edge of the opening 7, and the opening edge 16. Are formed so as to have a substantially straight corner line (inner line of the seal portion 9) 17 that forms a corner of the neck portion 5a (see FIG. 10) narrowing toward the upper side.

  In order to allow the cylindrical portion 10 to be inserted into the opening 7 in the step (3), the opening edge 16 is centered on the intersection P of the extension lines of the left and right corner lines 17 as shown in FIG. Thus, it is only necessary to be configured to be located outside the circle C when the circle C having the maximum outer diameter of the cylindrical portion 10 is drawn. In this example, in the trimming process of the above step (2), by forming the opening edge 16 along the circle C ′ having a diameter slightly larger than the maximum outer diameter of the cylindrical portion 10 with the intersection P as the center, When inserting the cylindrical part 10 into the opening 7 in the step (4), a slight gap is formed between the cylindrical part 10 and the opening 7 to facilitate the insertion operation of the cylindrical part 10. is there. Here, the diameter of the circle C ′ may be appropriately determined within a range in which the protruding portion 11 can abut against the periphery of the opening 7 and cannot pass through the opening 7. If the length is 102 to 140% (preferably 105 to 112%), the cylindrical portion 10 can be easily inserted into the opening 7 and the peripheral portion of the opening 7 is reliably welded to the upper surface of the protruding portion 11. be able to.

  The present invention is not limited to the above-described embodiment, and can be implemented with various modifications. Therefore, the modified example will be described below.

  For example, in the above embodiment, the container body 2 is formed by the four films 4. However, the present invention is not limited to this. For example, a single film formed into a cylindrical shape (the left and right ends of the sheet-like film are joined to each other). The container main body 2 can also be formed using a cylindrical film and a film that has been formed into a cylindrical shape from the beginning). In this case, what is necessary is just to replace the said process (1) with the process folded and folded inside by using the right and left of a cylindrical film as a gusset part. Furthermore, the container main body 2 can be formed of other number of films such as two or three. That is, the container main body 2 should just have the side surface which consists of a total of four surfaces, a gusset-like right and left side surface, and a flat front and back side surface.

  The sealing process in the steps (2), (4), and (5) is not limited to heat sealing, and may be performed by, for example, ultrasonic sealing.

  The upper surface of the protruding portion 11 does not extend substantially horizontally, and may have a tapered shape that spreads downward as shown in FIG. As a taper angle in this case, an angle in a range of 20 ° or less greater than 0 ° can be employed, assuming that the case of extending in the horizontal direction is 0 °. In addition, examples of the shape of the protruding portion 11 in this case include a truncated cone shape (a round bowl shape) and a truncated pyramid shape (a square bowl shape). When the upper surface of the protrusion 11 is tapered, when the spout 3 is inserted into the opening 7 in the step (3), the spout 3 is guided by the tapered surface, and the positioning becomes easy. ) In the sealing process can be improved.

  Moreover, although the some convex part 13 provided in the upper surface of the protrusion part 11 was concentric with each other, it may not be restricted to this, for example, may be a iris shape or a diamond shape, and each convex part 13 is further The shape is not limited to the annular protrusion, but may be another shape.

  You may provide the adhesion | attachment process for making the seal parts 9 and 14 follow a line shape on the outer surface of the container main body 2, or pinpointing after the said process (5). This adhesion process can be performed by, for example, heat sealing or ultrasonic sealing. And the rib effect is acquired by making the seal parts 9 and 14 follow the outer surface of the container main body 2, and the intensity | strength of the container main body 2 improves.

  In the above embodiment, the sheet piece (lower part of the sheet body 8) 15 has an isosceles triangle shape. This is because the bottom portion 6 of the container body 2 is connected to the front, rear, left and right of the lower end of the body portion 5 of the container body 2. It consists of four sheet pieces 15 that are installed and extend toward the inside of the body part 5 and are joined to each other, each sheet piece 15 is formed in a substantially symmetrical polygonal shape, and both left and right edges of each sheet piece 15 are In a case where the tilt angle (angle with respect to the horizontal axis as a reference (0 °)) is configured only by a portion that is greater than 45 ° and equal to or less than 60 ° (that is, the tilt angles of the left and right edges of each sheet piece 15 are greater than 45 °). It is only an example).

  Therefore, the sheet piece 15 can be configured as shown in FIGS. 13 and 17, for example (an example of FIG. 17 will be described later). That is, the left and right edges of the sheet piece 15 shown in FIG. 13 are, in order from the top, an edge H1 having an inclination angle θ1 of approximately 45 °, an edge H2 having an inclination angle θ2 of approximately 60 °, and an inclination angle θ3. Has a multi-stage shape composed of an edge H3 having an angle of approximately 45 °. When the bottom portion 6 of the pouch container 1 configured as described above is in a state where the pouch container 1 is inflated (filled state), the portions corresponding to the edges H1 and H3 are substantially horizontal as shown in FIG. Only the portion corresponding to the edge H2 between them is inclined, and also in this case, since the central portion of the bottom portion 6 is located above the peripheral portion (grounding portion), the self-supporting stability is improved. .

  In the above embodiment, the four films 4 forming the container body 2 have the same dimensions and the same shape. However, the present invention is not limited to this. For example, as shown in FIG. 15, the lateral widths of the two films 4A and 4B are set. The width of the other two films 4C and 4D may be larger. In this case, the formed pouch container 1 is as shown in FIG.

  At this time, as shown in FIG. 17, the sheet piece 15 formed by the films 4C and 4D has the same configuration as the sheet piece 15 shown in FIG. Instead of an equilateral triangle, the shape is an isosceles trapezoid. Here, the inclination angle θ of the left and right edges H4 of the sheet piece 15A is greater than 45 ° and equal to or less than 60 °, and the left and right edges H4 are connected to a lower edge H5 extending horizontally (with an inclination angle of 0 °). And if the bottom part 6 of the pouch container 1 comprised in this way will be in the state (filling state) which the pouch container 1 was expanded, the center part of the bottom part 6 can be located upwards rather than a peripheral part (grounding part). As a result, self-supporting stability can be improved.

  The pouch container 1 of the above embodiment has appropriate flexibility and can be not only self-supported in an inflated state as shown in FIG. 10, but also can be folded as shown in FIG. It is. And in order to enable this deformation | transformation, the thickness of each film 4 which comprises the pouch container 1 is made into the same grade (for example, 100-250 micrometers) as the thickness of the sheet | seat (film) which comprises a common pouch container. However, the pouch container 1 may be shaped so that the pouch container 1 has shapeability comparable to that of a general PET bottle, and the shape shown in FIG. 10 can be kept stronger.

  As such a shaping method, for example, with respect to the pouch container 1 obtained by setting the thickness of each film 4 to 10 to 400 μm and carrying out the above steps (1) to (5), this blowing step and this blowing step And a method of performing a preheating step for blow-drawing. Therefore, a method for shaping the pouch container 1 will be described below.

  In the preheating step, an external heating means for heating the pouch container 1 from the outside and an internal heating means for heating the pouch container 1 from the inside can be used, and both means can be used in combination.

  As the external heating means, for example, a heating device such as an oven type or a hot air type arranged so as to heat the pouch container 1 conveyed by a conveying means such as a belt conveyor from the outside, a temperature adjustment is possible, and the pouch container A mold or the like in which 1 is accommodated can be cited.

  As an internal heating means, a nozzle member (not shown) inserted into the pouch container 1 from the spout 3 in a state where the lid 12 is not mounted is provided, and a heating fluid (in the pouch container 1 is heated by this nozzle member). For example, a circulation device configured to circulate a gas such as hot air or a heated inert gas, or a heated liquid such as hot water may be used.

  Here, the temperature of the heating fluid may be 50 to 100 ° C., for example, and the time for supplying the heating fluid into the pouch container 1 may be 10 to 300 seconds, for example. In order to circulate the heating fluid in the pouch container 1, the heating fluid supplied from the nozzle member into the pouch container 1 is, for example, discharged from the spout 3 into the pouch container 1 in the same manner as the nozzle member. The pouch 3 is discharged from the spout 3 to the outside. Therefore, the internal pressure of the pouch container 1 hardly increases, and even when this internal heating means is used, the pouch container 1 hardly deforms as in the case where the external heating means is used.

  On the other hand, in the blow process, the pouch container 1 is placed (set) with only the spout 3 exposed to the outside, and the mold 18 is inserted into the pouch container 1 from the spout 3 and air is blown into the pouch container 1. Implemented by using a nozzle member 19 to be supplied and a sealing means such as a valve for sealing the pouch container 1 so that the air supplied from the nozzle member 19 into the pouch container 1 does not escape to the outside of the pouch container 1. (See FIGS. 19A to 19C).

  Moreover, as this blowing process, the pre-blowing process and the main blowing process in which the internal pressure of the pouch container 1 is increased as compared with the pre-blowing process can be performed in this order. More specifically, the pre-blow process is performed in a short time using air at a lower pressure than the main blow process. For example, air of 50 to 100 ° C. and 0 to 0.2 atm is applied to the pouch container 1 for 10 to 300 seconds. It is done by supplying. On the other hand, this blow process is, for example, 50 to 100 ° C. (70 ° C. as an example), 0.2 to 1 atm (as an example) in the pouch container 1 that has been inflated (a state of swelling to some extent) by the pre-blow process. 1 atm) of air is supplied for 1 to 120 seconds (for example, 5 seconds).

  By the blow process, the pouch container 1 is formed in a state of being in close contact with the inner surface of the mold 18 and having a predetermined shape (see FIGS. 19B and 19C).

  Here, the blow step (one or both of the pre-blow step and the main blow step) may be performed while adjusting the temperature of the mold 18 while the pouch container 1 is placed in the mold 18. In this case, the preheating process and the blowing process are performed simultaneously.

  Moreover, in the said blow process, although the preblow process is performed in order to perform the favorable blow process (main blow process) with respect to the pouch container 1 reliably, this preblow process may be abbreviate | omitted.

  Then, after the blowing step, a heat setting (heat setting) step may be performed, and a cooling step may be further performed.

  The heat setting step is performed, for example, at a set temperature of 60 to 80 ° C. for 10 to 120 seconds with the pouch container 1 placed in the mold 18.

  Further, the cooling step includes a nozzle member (not shown) inserted into the pouch container 1 from the spout 3 in a state where the lid 12 is not mounted, and the cooling fluid is introduced into the pouch container 1 by this nozzle member. Using a circulation device configured to circulate (for example, room temperature air), the cooling fluid can be supplied into the pouch container 1 for 10 to 120 seconds, for example. In order to circulate the cooling fluid into the pouch container 1, the cooling fluid supplied from the nozzle member into the pouch container 1 is discharged from the spout 3 into the pouch container 1 in the same manner as the nozzle member, for example. The tube is configured to be discharged from the spout 3 to the outside of the pouch container 1.

  The nozzle member 19 used in the blow process may also be used as the nozzle member of the internal heating means in the preheating process or the nozzle member of the cooling process, and the circulation device of the internal heating means in the preheating process is circulated in the cooling process. You may also use for an apparatus. For example, when the preheating process is performed using the internal heating means, all of the preheating process, the blowing process, the heat fixing process, and the cooling process are continuously performed with the pouch container 1 placed in the mold 18. In this way, the pouch container 1 can be shaped very efficiently.

  6 to 9 show the spout 3 in a state in which the lid 12 is attached. However, if the lid 12 is attached to the spout 3, a preheating process in the case of using an internal heating means, When the blow process and the cooling process are performed, the lid body 12 becomes an obstacle and the nozzle member cannot be inserted into the pouch container 1. When these processes are performed, the lid body is completed after the completion of these processes. 12 may be attached to the spout 3.

  Needless to say, the above modifications may be combined as appropriate.

1 Pouch container 2 Container body 3 Mouth member (spout)
4 Film 5 Body 6 Bottom 7 Opening 8 Sheet Body 10 Tubular Part 11 Protruding Part 13 Convex Part 15 Sheet Piece

Claims (17)

  A container body formed of a film, and a mouth member attached to the container body, the mouth member passing through an opening provided in an upper portion of the container body, and the tubular part A pouch container that has a protruding portion that is continuously provided and extends outward from the cylindrical portion, and a peripheral portion of the opening in the container body is welded to the upper surface of the protruding portion.   The body portion of the container body is composed of four surfaces, each surface extends from the opening to the bottom of the container body, and a pair of opposite surfaces of the four surfaces is folded when the body portion is folded. The pouch container of Claim 1 which has a gusset part folded inward. The upper surface of the protrusion extends substantially horizontally,
Further, the upper part of the body part in a state where the gusset part is folded inwardly is an opening edge constituting the edge of the opening, and a neck part that is continuous with the left and right of the opening edge and narrows toward the upper side. A substantially straight corner line that forms a corner, and the opening edge describes a circle having a maximum outer diameter of the cylindrical portion around an intersection of the extension lines of the left and right corner lines The pouch container according to claim 2, wherein the pouch container is configured so as to be positioned outside the circle when it is touched.   The said opening edge is comprised so that it may follow this circle | round | yen when drawing the circle | round | yen which has the outer diameter of 102 to 140% of the maximum outer diameter of the said cylindrical part centering | focusing on the said intersection. 3. The pouch container according to 3.   3. The pouch container according to claim 1, wherein an upper surface of the projecting portion extends substantially horizontally or has a taper angle of 20 ° or less that extends downward.   The pouch container according to any one of claims 1 to 5, wherein a convex portion is provided on an upper surface of the protruding portion.   The bottom portion of the container body is composed of four sheet pieces that are connected to the front, rear, left, and right of the lower end of the body portion of the container body, and extend toward the inside of the body portion. The pouch container according to any one of claims 1 to 6, wherein the pouch container is formed in a shape, and an inclination angle of both right and left edges of each sheet piece is greater than 45 ° and 60 ° or less.   The pouch container according to claim 7, wherein each of the sheet pieces is formed in an isosceles triangle shape having the same size.   With respect to the substantially bag-shaped sheet body made of a film and having an opening on one end side and the other end side opened, a mouth member is inserted into the sheet body from the other end side, and the cylindrical portion of the mouth member is After the state of projecting from the opening to the outside of the sheet body, the opening of the opening in the sheet body is formed on the upper surface of the projecting section that is connected to the tubular section and extends outward from the tubular section. A method for manufacturing a pouch container in which a peripheral edge portion is welded and the other end side of the sheet body is closed.   10. The method of manufacturing a pouch container according to claim 9, wherein the upper surface of the projecting portion extends substantially horizontally or has a taper angle of 20 ° or less spreading downward.   The manufacturing method of the pouch container of Claim 9 or 10 with which the convex part is provided in the upper surface of the said protrusion part.   The left and right sides of the sheet body are provided with gusset portions that are folded inward when the sheet body is folded, and the lower portion of the sheet body forms a bottom when the folded sheet body is unfolded. The lower part of the folded sheet body is formed into a substantially symmetrical polygonal shape, and the inclination angles of the left and right edges are set to be greater than 45 ° and 60 ° or less, and The manufacturing method of the pouch container as described in any one of Claims 9-11 which joins the lower periphery of a sheet | seat body.   A preheating process and a blowing process for the pouch container according to any one of claims 2 to 4 or for the pouch container obtained by the method for producing a pouch container according to any one of claims 9 to 12. A method of shaping the pouch container.   The method for shaping a pouch container according to claim 13, wherein the preheating step is performed using a heating means for heating the pouch container from the outside of the pouch container.   The method for shaping a pouch container according to claim 13, wherein the preheating step is performed by circulating a heating fluid in the pouch container.   The method for shaping a pouch container according to any one of claims 13 to 15, wherein the blow process includes a pre-blow process and a main blow process for increasing an internal pressure of the pouch container more than the pre-blow process.   The method for shaping a pouch container according to any one of claims 13 to 16, wherein the blowing step is performed in a state where the pouch container is placed in a mold and the temperature of the mold is adjusted.

Images