JP2007269398A - Flexible receptacle, its manufacturing method, and content-held flexible receptacle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible receptacle capable of effectively preventing contents from curing, degrading or transforming, etc., by the presence of moisture in atmospheric air by reducing residual air or a moisture content in the receptacle as much as possible, its manufacturing method and a content-filled flexible receptacle. <P>SOLUTION: The flexible receptacle comprises: a receptacle body 2 having a cylindrical body 10, a ring member 11 around the outer periphery at the top end of the body 10, sealed sections 12 at lower ends of the body 10 wherein the lower ends are flatly overlapped to be air-tightly fusion-bonded, and guide sections 12a that tilt or curve upward at both the top end edges of the sealed section 12 in a direction to the side of the body 10; and a closure member 3 which encloses the top edge opening 13 of the receptacle body 2. The engaging cylindrical section of the closure member 3 is engaged, from the inside, with the ring member 11 as the receptacle body 2 is filled with contents, while the top edge of the body 10 which is arranged at the engagement portion between the closure member 3 and the ring member 11 is heated by high-frequency induction, and thus the closure member 3 is air-tightly fusion bonded to the ring member 11 through the medium of the body 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a soft container suitable for filling a highly viscous liquid such as a sealing material, a method for producing the same, and a content-containing soft container.

  As a conventional container filled with a sealing material, as in a container 100 shown in FIG. 17, a rigid cylindrical container in which a discharge port 102 for discharging the sealing material 101 is formed at the distal end and the base end is opened. A main body 103, a plunger 104 fitted and fitted to the proximal end opening of the container main body 103, a sealing lid 105 for sealing the discharge port 102, and an inner surface of the container main body 103 so as to close the discharge port 102 What was equipped with the sealing film 106 fuse | melted is widely employ | adopted. In this container 100, after opening the sealing lid 105 and cutting the sealing film 106, a nozzle (not shown) is attached to the discharge port 102, and this is attached to a dedicated discharge gun. By the operation, the plunger 104 is moved to the inner front end side of the container body 103 while applying a pressing force to the sealing material 101, so that the sealing material 101 can be discharged from the nozzle.

  In the container 100 having such a configuration, the air between the plunger 104 and the sealing material 101 can be discharged almost completely to the outside, and the airtightness between the plunger 104 and the container body 103 can be sufficiently secured. For this reason, it is currently widely used as a container for a sealing material that is hardened by moisture or air. However, since the container body 103 is hard, the container body 103 cannot be crushed small after the sealing material 101 is used up. The volume reduction of the container body 103 is limited, and there is a problem that waste is bulky.

  Therefore, as a soft container filled with a highly viscous liquid such as a sealing material, a bottom plate member is fitted and fused to the lower end portion of the cylindrical main body portion made of a soft film, and a ring member is fitted and fused to the upper end portion. A bottomed cylindrical container body, a lid member fitted in an airtight manner to the ring member of the container body, and a sealing film fused to the lower surface of the lid member so as to close the discharge port formed in the lid member; (For example, refer patent document 1). In this soft container, like the container 100, the sealing film 106 is opened and the discharge port is opened, and then a nozzle is mounted on the discharge port, and this is mounted on a dedicated discharge gun. By operating the lever, the bottom plate member is moved to the lid member side, applying pressure to the sealing material and crushing the main body in the length direction, so that the sealing material can be discharged from the nozzle, and the contents are discharged. It is configured so that the volume of the soft container can be greatly reduced.

  In addition, this Patent Document 1 includes an annular groove that opens downward in the outer peripheral portion of the lid member in order to ensure sufficient airtightness and fitting strength in the fitting portion between the lid member and the ring member. A lid-side fitting portion is formed, an annular container-side fitting portion that is concavo-convexly fitted to the lid-side fitting portion is formed at the upper end portion of the ring member, and a lid member and a ring member are formed on the outer edge portion of the sealing film In the state where the seal portion extending to the fitting portion is formed and the lid member is fitted to the ring member, the seal portion is heated by the high frequency induction heating device, and the lid member and the ring member are melted via the seal portion. It is configured to be worn.

  On the other hand, as a tube-shaped soft container containing viscous liquid such as an adhesive, a cylindrical main body made of a laminated sheet containing a saponified ethylene-vinyl acetate copolymer excellent in gas barrier properties, and an upper end opening of the main body A container body having a ring member fixed to the part by heat sealing, a sealing part formed by air-tightly heat-sealing the lower end part of the main body flat, and a tube threadably detachably screwed to the ring member A tube-shaped soft container provided with a head and a cap that is detachably screwed to the tube head has been proposed (see, for example, Patent Document 2). In this soft container, the container body is oriented vertically, and the container body is filled with the contents with a filling nozzle, and then the tube head is attached to the ring member, and the cap is attached to the tube head so that the contents are placed in the soft container. It is configured to accommodate.

JP 2006-36218 A Japanese Patent Laid-Open No. 11-11501

  By the way, in the soft container described in Patent Document 2, the filling nozzle is disposed in the vicinity of the ring member, and the container body is filled with the contents, so that the filling is performed at the bottom of the container body having a large drop from the filling nozzle. Since the air bubbles are easily caught in the contents and the boundary between the sealing portion and the main body is formed in a straight shape, the triangular corner formed in the main body near the both ends of the sealing portion Air tends to remain on the surface. For this reason, when the reeling material and adhesive which harden | cure with the humidity and water | moisture content in air | atmosphere are accommodated, there exists a problem that the content hardens | cures with the moisture and water | moisture content in air | atmosphere which remained in the container main body.

  Moreover, in the soft container described in Patent Documents 1 and 2, a ring member is manufactured in advance by an injection molding apparatus, and this is fitted into the upper end of the cylindrical main body, and is fused from the outer peripheral side by heat sealing or the like. For this reason, although the ring member molding apparatus can be made compact to reduce the equipment cost, there is also a problem that the manufacturing process of the container main body is complicated and sufficient productivity cannot be secured.

  The object of the present invention is to reduce the residual air in the soft container as much as possible, and to effectively prevent the contents from hardening or deteriorating due to moisture or moisture in the atmosphere, deterioration, etc., and to use a dedicated discharge gun. And providing a simple tube-like soft container that can be pushed out by hand, a method for producing the same, and a content-containing soft container.

  The flexible container according to the present invention is a tube-like body having a cylindrical main body that can be filled with contents from above, and a sealing portion that is formed by overlapping the lower end of the main body flatly and hermetically fusing. In the soft container, guide portions that are inclined or curved upward are formed at both ends of the upper edge of the sealing portion on the main body side.

  In this soft container, since the guide part which inclines or curves toward the upper part is formed in the upper edge both ends of the main body part side of the sealing part, when the main body part is filled with contents from the upper side The filled contents are filled while being guided by the guide portions in the vicinity of both ends of the sealing portion, and the remaining of air in the portions is effectively prevented. Moreover, since the lower end part of the main body part is sealed by fusion, it is possible to easily manufacture soft containers having different contents by simply adjusting the sealing position in the vertical direction.

  The inclination angle and the radius of curvature of the guide part before filling the contents can be appropriately set according to the viscosity of the contents to be filled, etc., but when filling the sealing material as the contents, the inclination angle of the guide part Can be set to 40 ° to 65 ° with respect to the middle portion of the upper edge of the sealing portion, and the curvature radius of the guide portion can be set to 15 to 25 mm.

  It is also a preferred embodiment to form a hooking hole in the sealing portion for hooking a soft container on a hook and displaying it in an inverted manner. In the conventional hard container for a sealing material as shown in FIG. 17, it was displayed in a vertical orientation, or it was displayed in a horizontal orientation. The hooking hole can be hooked on a hook or the like to display in the vertical direction, and the display space can be saved.

  It is also a preferred embodiment that a ring member is fusion-fixed to the upper end portion of the main body portion, and a lid member having a discharge port for contents is fitted to the ring member, so that both are hermetically fused and fixed. With this configuration, after the contents are filled into the main body through the ring member, the lid member is fitted to the ring member, and both are hermetically fused and fixed, so that the contents are hermetically sealed in the soft container. it can.

  In the case of using a ring member and a lid member, the main body portion is composed of a soft film in which resin layers are provided on both sides of a conductive thin film, and the ring member is inserted into the outer periphery of the upper end of the main body portion by insert injection. In a state in which a cover member having a fitting cylinder part fitted inside the ring member and a discharge port for contents is provided, and the fitting cylinder part of the lid member is fitted in the ring member, In a preferred embodiment, the upper end portion of the main body portion disposed between the fitting portions is subjected to high-frequency induction heating so that the lid member is hermetically fused and fixed to the ring member via the main body portion. With this configuration, the airtightness and bonding strength between the ring member and the main body can be improved, and the lid member can be hermetically fused to the ring member via the main body by high frequency induction heating. Airtightness and fitting strength between members can be sufficiently secured. Furthermore, since the fusion | melting part of a cover member and a ring member is not exposed outside and it can comprise so that it may not deform | transform, the external appearance of a soft container can be improved.

  Moreover, in this soft container, since the main body part is composed of a soft film, the contents can be discharged while easily crushing the main body part of the soft container in the length direction and the radial direction, so the contents are used up. The later waste is a flattened body, which can greatly reduce the volume of waste. Further, since this soft container can be pushed and discharged manually without using a dedicated discharge gun, it can be discharged with one hand even in a narrow place. Furthermore, when the ring member is made of a hard material, the soft container is held in a cylindrical shape in a state where the contents are filled, so that the handleability of the soft container can be sufficiently secured.

  Here, a folded part is formed in the main body part between the fitting part of the lid member and the ring member, and the folded part is heated by high frequency induction heating, whereby the lid member is hermetically fused to the ring member via the folded part. A flange portion is formed on the lid member so as to extend to the upper surface side of the ring member, a flange portion is formed between the flange portion and the ring member at an upper end outer peripheral portion of the main body portion, and the flange portion is heated by high-frequency induction heating. It is a preferred embodiment that the lid member is hermetically fused to the ring member via the portion. That is, in high frequency induction heating, the thin film generates heat by the eddy current formed in the conductive thin film and heats the surrounding synthetic resin, so that a folded portion and a flange portion are formed at the upper end of the main body. Thus, the area of the conductive thin film that generates heat in the fitting portion can be increased, and the fitting portion can be efficiently heat-sealed. Further, it is possible to sufficiently heat the necessary part while setting the output of the high frequency induction heating small so that the part that does not need to be heated is not heated.

  It is also a preferred embodiment that a resin layer having compatibility with the ring member and the lid member is provided in a laminated form on the outer surface side and the inner surface side of the main body portion in the soft film. If comprised in this way, between a ring member and a cover member, and a main-body part can fully be melt | fused, and airtightness and joint strength can fully be ensured. In particular, when polyethylene is used as the compatible resin, it is difficult to change quality by contact with the sealing material, so that a flexible container suitable as a container for the sealing material can be realized. In particular, even if the sealing material is hardened or deteriorated easily by moisture or moisture in the atmosphere, this soft container can improve the airtightness of the main body and both ends of the main body, so that the moisture-curable sealing material Can be used for containers.

  A first soft container manufacturing method according to the present invention is a tube-shaped soft container having a cylindrical main body that can be filled with contents from above and a sealing portion that seals the lower end of the main body. In the manufacturing method, when the sealing portion is formed by fusing the lower end portion of the main body portion in a flat manner and fusing to the lower end portion of the main body portion, the upper end ends at both ends of the main body side of the sealing portion It fuses so that the guide part which inclines or curves toward may be formed.

  The second soft container manufacturing method according to the present invention includes a cylindrical main body portion made of a soft film in which resin layers are provided in a laminated form on both surfaces of a conductive thin film, and an upper end outer peripheral portion of the main body portion. A method of manufacturing a tubular soft container having a ring member and a sealing portion formed by airtightly fusing a lower end portion of a main body portion flatly, and setting the main body portion in a mold, When the ring member is integrally formed by insert injection at the outer periphery of the upper end of the main body, and then the lower end of the main body is flattened and the sealing portion is formed by fusing to the lower end of the main body. The guide part which inclines or curves upwards is formed in the upper edge both ends of the main-body part side so that it may fuse | melt.

  The content-containing soft container according to the present invention includes a cylindrical main body made of a soft film in which resin layers are provided on both sides of a conductive thin film, and a ring member provided on an upper end outer peripheral portion of the main body. A contents-containing soft container which is filled with contents in a container body having a sealing portion formed by hermetically fusing the lower end portion of the main body in a flat shape and hermetically sealed with a lid member Then, the main body is set in a mold, and a ring member is integrally formed on the outer periphery of the upper end of the main body by insert injection, and then the lower end of the main body is flattened and melted to the lower end of the main body. When forming a sealing part by wearing, a manufacturing process of a container body that is fused so that a guide part that is inclined or curved upward is formed at both ends of the upper edge of the main body part side of the sealing part; A fitting tube portion fitting inside the ring member and a discharge port for contents In the state which has the manufacturing process of the lid member which has, the sealing process which sticks the sealing film which seals a discharge mouth on the lid member, and holding the ring member and supporting the container body vertically Insert the nozzle into the bottom of the container, move the nozzle out of the container body while discharging the contents from the nozzle, fill the contents into the container body, and fit the lid member with the sealing film attached The combined tube portion is internally fitted to the ring member, the upper end portion of the main body portion arranged between the lid member and the fitting portion of the ring member is heated by a high frequency induction heating device, and the lid member is ringed through the main body portion. It is manufactured through a content enclosing step that is hermetically fused to the member.

  Here, in the content-containing soft container, in the container manufacturing process, a folded portion is formed at the upper end of the main body, and this is set in a mold to manufacture the container main body. The folded portion is heated by an induction heating device, and the lid member is hermetically fused to the ring member via the folded portion. In the container manufacturing process, a flange portion extending outward is formed at the upper end portion of the main body portion. Then, this is set in a mold to produce a container body, and in the contents filling step, the flange portion is heated by a high frequency induction heating device, and the lid member is hermetically fused to the ring member via the flange portion. A resin layer having compatibility with the ring member and the lid member on the outer surface side and the inner surface side of the main body portion of the flexible film, respectively, and a resin as the compatible resin. In the content enclosing step, the upper end portion of the main body portion is sandwiched between the ring member and the fitting portion of the lid member after the fitting cylinder portion of the lid member is fitted inside the ring member. It is preferable to heat the upper end portion of the main body portion with a high frequency induction heating device while pressurizing the ring member or the lid member so that the lid member is hermetically fused to the ring member via the main body portion. It is a form.

  According to the soft container, the manufacturing method thereof, and the contents-containing soft container according to the present invention, a simple configuration in which a guide portion that is inclined or curved upward is formed at both upper edge ends of the sealing portion on the main body side. Thus, when the contents are filled into the main body from above, the filled contents are filled while being guided by the guide portions in the vicinity of both ends of the sealing portion, and the residual air in the portions is effectively prevented. Will be prevented. For this reason, even when a soft container is filled with contents that react with moisture or moisture in the atmosphere, or deteriorate or deteriorate due to moisture or moisture in the atmosphere, the reaction, deterioration, or alteration of the contents Can also be prevented. Further, since it is a tube-shaped soft container, it can be manually ejected without using a dedicated discharge gun. It can also be pushed out with one hand, especially in narrow or high places. Furthermore, since the lower end portion of the main body portion is sealed by fusion, it is possible to easily manufacture soft containers having different contents by simply adjusting the sealing position in the vertical direction.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 7, the soft container 1 is made of a soft film in which resin films (corresponding to resin layers) 10 b and 10 c are provided on both sides of a conductive thin film 10 a (see FIG. 6). A cylindrical main body portion 10, a ring member 11 provided on the outer periphery of the upper end of the main body portion 10, and a sealing portion 12 formed by overlapping the lower end portions of the main body portion 10 in a flat and airtight manner. The ring member 11 is integrally formed with the main body portion 10 by insert injection, and the guide portion 12a that is inclined or curved upward is formed at both upper edge ends of the sealing portion 12 on the main body portion 10 side. A lid member 3 having a main body 2, a fitting cylinder portion 20 that fits inside the ring member 11, and a discharge port 21 for the contents 5, and closing the upper end opening 13 of the container body 2; Seal that is fused to the lower surface to close the discharge port 21 The fitting cylinder portion 20 of the lid member 3 is fitted into the ring member 11 while the container body 2 is filled with the contents 5, and the fitting portion between the lid member 3 and the ring member 11 is provided. The upper end portion of the main body portion 10 disposed between 20a and 11a is induction-heated by high frequency, whereby the lid member 3 is hermetically fused to the ring member 11 via the main body portion 10, and the contents 5 are placed in the soft container 1 Is hermetically sealed.

  The contents 5 are preferably high-viscosity liquids such as sealing materials, adhesives, and paints, but high-viscosity liquids such as mayonnaise and jams, and liquids or gels other than high-viscosity liquids. It is also possible to store the contents 5 in the soft container 1. In particular, since the airtightness of both ends is sufficiently ensured, the soft container 1 is a sealing material that is easily affected by moisture and air in the atmosphere as the contents, and is suitable as a container for a moisture-curable sealing material. Available to:

  As shown in FIG. 6, the main body 10 is composed of a soft film material having a multilayer structure in which resin films 10b and 10c are laminated on both surfaces of a thin film 10a made of conductive metal foil such as aluminum foil. A soft film is rolled into a cylindrical shape, both side edges are overlapped, and the overlapped portion is fused with a heat seal, an ultrasonic seal, a high frequency induction seal, or the like. In the present embodiment, a film material having a three-layer structure to a four-layer structure in which a thin film 10a made of an aluminum foil is laminated between resin films 10b and 10c is used. It is manufactured in a cylindrical shape by overlapping and heat-sealing. As a material of the resin films 10b and 10c to be laminated, a heat-sealable thermoplastic resin such as polyethylene, polyester, polypropylene, nylon, or the like can be suitably used. In particular, it is preferable to use a material that is compatible with the ring member 11 and the lid member 3, and when the container body 2 is filled with the sealing material as the contents 5, it is in contact with the sealing material. Therefore, it is desirable to use a polyethylene film because a polyethylene or polypropylene film which does not deteriorate due to the above can be suitably used and can be obtained at a particularly low cost. Moreover, when filling the container body 2 with the sealing material as the contents 5, since the use conditions are different on the inner surface side and the outer surface side, it is also possible to use the resin films 10b and 10c made of a material according to the use conditions. For example, a polyethylene or polypropylene film that does not deteriorate due to contact with the sealing material is used as the inner resin film 10b, and a polyester or nylon film that emphasizes strength and gas barrier properties as the outer resin film 10c. Can also be used.

  The main body portion 10 can be configured to have the same diameter over its entire length, but it has one end in order to facilitate extraction from a cylindrical or columnar mandrel used when forming into a cylindrical shape or when performing insert injection. It is preferable to form a gently tapered cylinder having a reduced diameter.

  The lower end portion of the main body portion 10 is formed with a sealing portion 12 formed by overlapping the lower end portion of the main body portion 10 flatly and hermetically fusing with a heat seal, an ultrasonic seal, a high frequency induction seal, or the like. A guide portion 12a extending obliquely upward is formed at both ends of the upper edge of the stopper 12 on the main body portion side, and a substantially horizontal horizontal portion 12b is formed in the middle portion. As will be described later, when the main body 10 is filled with the contents 5 from above, the filled contents 5 are guided by the guide portions 12a at the corner portions 17 near both ends of the sealing portion 12. Thus, the air is effectively prevented from remaining in the corner portion 17. Thus, in order to effectively prevent the remaining of air in the corner portion 17, as shown in FIG. 7, the inclination angle θ of the guide portion 12 a before filling the contents 5 is 40 ° to 65 °, preferably It is set to 50 ° to 65 °, more preferably 50 ° to 65 °. The length of the guide portion 12a in the horizontal direction can be arbitrarily set, and can be set to a length at which the horizontal portion 12b is not formed in the middle portion of the upper edge of the sealing portion 12. Moreover, although it is preferable to set the length and inclination | tilt angle (theta) of the left-right guide part 12a to the same, it can also set to a different length and angle.

  Further, as the guide portion 12a, an arcuate guide portion 12c can be formed at both ends of the upper edge of the sealing portion 12A, like the sealing portion 12A of the main body portion 10A shown in FIG. In this case, it is preferable to set the curvature radius R of the guide portion 12c before filling the contents 5 to 15 to 25 mm in order to effectively prevent air from remaining in the corner portion 17 as described above.

  A hooking hole 18 for hooking the soft container to the hook and displaying it in an inverted manner is formed at a substantially central portion of the sealing portion 12. However, the hooking hole 18 can be omitted.

  The lid member 3 and the ring member 11 are made of a material having compatibility with the resin films 10 b and 10 c of the main body 10 in consideration of the fusion property with the main body 10. Specifically, it can be made of a synthetic resin material such as polyethylene or polypropylene, and is particularly preferably made of polyethylene because it can be obtained at a low cost.

  As shown in FIGS. 1 to 4, a ring portion 14 is formed in the lower half portion of the ring member 11, and a container side fitting portion 15 having a slightly smaller diameter than the ring portion 14 protrudes upward in the upper half portion. An annular fitting groove 16 is formed on the outer peripheral surface of the base portion of the container side fitting portion 15. The ring member 11 is integrally formed on the outer periphery of the upper end of the main body 10 by insert injection. The upper end of the main body 10 is hermetically fused to the inner peripheral surface of the ring member 11, and the upper end of the main body 10 and the ring member 11 are fused. It is arrange | positioned in the substantially same height position as the upper end part of.

  As shown in FIGS. 1 to 5, the lid member 3 includes a fitting cylinder portion 20 fitted into the ring member 11, and an upper end opening of the container body 2 extending inward from the lower end portion of the fitting cylinder portion 20. 13 is formed integrally with a lid main body 22 that closes 13 and a flange 23 that extends outward from the upper end of the fitting cylinder 20. A lid-side fitting portion 24 formed of an annular groove that fits outside the container-side fitting portion 15 of the ring member 11 is formed in the flange portion 23 so as to open downward. A locking claw 25 that fits into the fitting groove 16 of the ring member 11 is formed in an annular shape. A discharge portion 26 that protrudes upward is formed in a substantially central portion of the lid body 22, and a discharge port 21 that communicates with the inside of the container body 2 is formed in the discharge portion 26. The fitting groove 16 of the ring member 11 and the locking claw 25 of the lid member 3 can be omitted. Further, the container side fitting portion 15 of the ring member 11 and the lid side fitting portion 24 of the lid member 3 may be omitted.

  In order to prevent air from remaining in the container body 2 when the lid member 3 is plugged against the ring member 11, the lower end outer peripheral surface of the fitting cylinder portion 20 of the lid member 3 faces downward. A tapered portion 27 that is reduced in diameter is formed, and a lower end is opened in the container main body 2 in the middle portion of the fitting tube portion 20, and an upper end portion extends to a substantially central portion in the height direction of the fitting tube portion 20. Grooves 28 are formed at intervals in the circumferential direction.

  The sealing film 4 that closes the discharge port 21 is hermetically fused to the lower surface of the lid body 22. The sealing film 4 is composed of a laminate film having the same configuration as that of the soft film constituting the main body 10 in order to sufficiently secure the gas barrier property. However, it can also be comprised with a single layer resin film or metal foil. When taking out the contents 5 from the soft container 1, the sealing film 4 in the discharge port 21 is cut open, a nozzle (not shown) is attached to the discharge portion 26, and the contents 5 are manually pushed out and discharged from the nozzle. become.

  In this soft container 1, the fitting cylinder portion 20 of the lid member 3 is fitted inside the ring member 11, and the lid side fitting portion 24 of the lid member 3 is fitted to the container side fitting portion 15 of the ring member 11. Further, the lid member 3 is attached to the ring member 11 by fitting a locking claw 25 formed on the outer peripheral end of the flange portion 23 of the lid member 3 into the fitting groove 16 of the ring member 11. Further, in this state, as shown in FIG. 4, the upper end portion of the main body portion 10 is between the fitting portions 11 a and 20 a between the inner peripheral surface of the ring member 11 and the outer peripheral surface of the fitting cylindrical portion 20 of the lid member 3. The conductive thin film 10a at the upper end of the main body 10 is heated to generate heat by high frequency induction heating, and the resin films 10b and 10c laminated on the thin film 10a and the fitting parts 11a and 20a facing each other The ring member 11 and the lid member 3 are hermetically fused and fixed via the main body 10 by heat-sealing the resin portion. Since the groove portion 28 extending from the lower end portion thereof to the substantially central portion in the height direction is formed in the fitting cylinder portion 20 of the lid member 3, the fitting portion 20 a is formed from the upper end portion of the groove portion 28 to the flange portion. It is formed in a range up to 23, and the formation range of the fitting portion 11a is formed in a range corresponding to the fitting portion 20a. The formation range in the height direction of the fitting portions 11a and 20a is appropriately set in consideration of the airtightness and the coupling strength between the fitting portions 11a and 20a.

Next, the manufacturing method of the content accommodation soft container which filled the content 5 in the soft container 1 is demonstrated.
The manufacturing method of the contents-containing soft container includes the manufacturing process of the container body 2, the manufacturing process of the lid member 3, the container body 2 is filled with the contents 5, and the lid member 3 is airtightly fitted to the ring member 11. It is comprised from the content enclosure process to fix.

  In the manufacturing process of the container body 2, a soft film is wound around a mandrel, and both side edges thereof are fused by a heat seal, an ultrasonic seal, a high-frequency induction seal, or the like to produce a substantially cylindrical main body 10. Next, as shown in FIG. 9, the main body 10 is set on the dies 31, 32 with the mandrel 30 being sheathed, and the molten resin is injected into the molding space 33 formed in the dies 31, 32. Then, the ring member 11 is integrally formed on the outer periphery of the upper end of the main body 10 by insert injection. As described above, the ring member 11 is integrally formed with the main body portion 10 by insert injection, so that the ring member 11 and the main body portion 10 can be securely and hermetically sealed, and a sufficient bonding strength can be ensured. . Next, the main body part 10 in which the ring member 11 is integrally formed is taken out from the mandrel 30, and the lower end part of the main body part 10 is hermetically fused by heat sealing, ultrasonic sealing, high frequency induction sealing, or the like. 12 is formed. At this time, as shown in FIGS. 7 and 8, guide portions 12 a and 12 c that are inclined or curved upward are formed at the upper edge both ends of the main body portions 10 and 10 </ b> A of the sealing portions 12 and 12 </ b> A. In addition, it will be hermetically fused.

  In the manufacturing process of the lid member 3, the lid member 3 is molded by a known injection molding method, and the sealing film 4 that closes the discharge port 21 on the bottom surface of the lid member 3 is sealed by heat sealing, ultrasonic sealing, high-frequency induction sealing, or the like. Fix by fusion.

  In the contents enclosing step, as shown in FIG. 10 (a), the ring member 11 of the container body 2 is held by a holding means (not shown) and the container body 2 is supported in the vertical direction. Insert the injection tube 40 into the inner part of the container body 2 and in this state inject the contents 5 from the injection tube 40 into the container body 2, lower the container body 2 relative to the injection tube 40, A necessary amount of the content 5 is injected into the container body 2 so that bubbles do not enter the content 5. At this time, as shown in FIG. 11, the contents 5 supplied from the injection pipe 40 spread from the lower end of the main body 10 to both sides and are guided to the corners 17 while being guided by the guides 12a, whereby the corners 17 are filled. It is also possible to prevent air from remaining in the portion 17.

  And in the state which injected the contents 5, as shown in FIG.10 (b), since the viscosity of the contents 5 is high, the liquid level of the contents 5 becomes a mountain shape where the center part rose. Next, as shown in FIG.10 (c), the middle part of the main-body part 10 of the container main body 2 which inject | poured the content 5 is pressed with the press member outside a figure, and the liquid level of the content 5 is raised, The apparent injection amount of the injected contents 5 is adjusted to be large. At this time, the liquid level of the contents 5 rises in a state where the mountain shape at the time of injection is substantially maintained. Next, after releasing the pressing by the pressing member, the lid member 3 in which the sealing film 4 is fused to the lower surface in advance is protruded downward by a plugging means (not shown) to return the main body 10 to its original shape. However, as shown in FIG. 10 (d), the fitting cylinder portion 20 of the lid member 3 is inserted into the ring member 11 of the container body 2. At this time, as shown in FIG. 12, the lid member 3 is first brought into close contact with the top of the liquid level of the contents 5, and then the top of the liquid level is crushed, that is, the close contact portion between the liquid level and the lid member 3 is Since it is in close contact with the liquid surface of the contents 5 while spreading to the side, the air between the lid member 3 and the contents 5 is discharged, and when the lid member 3 begins to be inserted into the ring member 11, the gas vent groove 28. Inside, a gap is formed between the sealing film 4 and the ring member 11, and the gap is substantially completely discharged to the outside through this gap, and the lid member 3 is inserted into the ring member 11 as shown in FIG. 13.

  At this time, the lid member 3 is pushed into the ring member 11, and the container side fitting portion 15 of the ring member 11 is fitted to the lid side fitting portion 24 of the lid member 3 as shown in FIG. The locking claw 25 of the lid member 3 is fitted into the fitting groove 16 of the ring member 11, and the lid member 3 is fitted to the ring member 11. Since the main body 10 is composed of a flexible thin film 10a, the lid member 3 is inserted into the ring member 11 with a force larger than the pressing force of the pressing member without releasing the pressing of the main body 10 by the pressing member. It can also be plugged. However, in the case where the container body 2 is filled with a content 5 that does not cause a problem such as deterioration in quality even if some bubbles are mixed in, the container body 2 is filled with the content 5 and then the body 10 It is also possible to plug the lid member 3 without performing a process such as pressing the middle part with a pressing member (not shown).

  Thus, after the lid member 3 is plugged, as shown in FIG. 14, a pressure member (not shown) is supplied to the induction coil 41 of the high-frequency induction heating device while supplying 2.5 kW of power at a frequency of 900 kHz, for example. Thus, the lid member 3 is pressed inward with a pressure of 0.2 to 0.4 MPa for 1.5 to 2.5 seconds, and the inner peripheral surface of the ring member 11 and the outer periphery of the fitting cylinder portion 20 of the lid member 3 While sandwiching the upper end of the main body 10 between the fitting portions 11a and 20a with the surface, the induction coil 41 generates heat from the thin film 10a of the soft film constituting the upper end of the main body 10, and the thin film 10a causes the main body 10 to be heated. The resin films 10b and 10c at the upper end of the resin and the resin portions of the fitting portions 11a and 20a in the vicinity thereof are heated and melted, and the lid member 3 and the ring member 11 are fused via the upper end of the main body 10, and the lid Member 3 is a ring member 11 It will be fixed in an airtight manner. If the applied pressure is less than 0.2 MPa, poor fusing occurs, and if it exceeds 0.4 MPa, the lid member 3 and the ring member 11 are deformed, so that the applied pressure can be set to 0.2 to 0.4 MPa. Preferably, when the pressurization time is less than 1.5 seconds, poor fusion occurs, and when it exceeds 2.5 seconds, the lid member 3 and the ring member 11 are deformed by overfusion, so that 1 It is preferable to set to 5 to 2.5 seconds. The output and heating time of the high frequency induction heating are set within a range in which the main body portion 10 below the ring member 11 is not deformed or deteriorated by heating, and preferably fitted above the taper portion 27. It sets so that only the upper end part of the main-body part 10 arrange | positioned between the parts 11a and 20a may be heated. However, the lid member 3 can be heated by the induction coil 41 while pressing the lid member 3 downward or pressurizing downward and circumferentially, or when the lid member 3 is strongly fitted to the ring member 11 The pressurization of the lid member 3 by the pressurizing member can be omitted. Further, although the induction coil 41 is arranged on the upper side of the lid member 3, the induction coil 41 can be arranged on the outer circumferential side of the lid member so as to surround the outer circumference of the lid member 3.

  In the contents-containing soft container in which the contents 5 are injected and plugged into the container body 2 in this way, there is almost no entrainment of bubbles with respect to the contents, and in the corner portion 17 near both ends of the sealing portion 12. Air remaining is also prevented, and air remaining in the vicinity of the lid member 3 can be effectively prevented, and deterioration and hardening of the contents 5 due to residual air can be effectively prevented. In addition, since the resin films 10b and 10c of the main body 10 are fused to the lid member 3 and the ring member 11, respectively, the airtightness between the fitting portions 24 and 15 can be sufficiently secured, so the lid member 3 and the ring member Curing and quality deterioration of the contents 5 due to the intrusion of outside air from the gaps 11 can be effectively prevented. Therefore, for example, even when the content 5 is filled with a sealing material made of a moisture curable composition, moisture can be reliably prevented from entering the container body 2 and the content 5 can be prevented from being cured by moisture. .

  In addition, like the soft container 1B shown in FIG. 15, the container main body 2B which formed the folding | returning part 50 in the upper end part of the main-body part 10B between the fitting parts 24 and 15 of the cover member 3 and the ring member 11 is used, and this container is used. In a state where the lid member 3 is fitted to the ring member 11 of the main body 2 </ b> B, the folded portion 50 is hermetically fused to the ring member 11 via the folded portion 50 by high-frequency induction heating. it can. In this case, since the conductive thin film 10a disposed between the ring member 11 and the lid member 3 overlaps, the heat generation amount can be increased by increasing the area of the heat generation portion of the thin film 10a by high frequency induction heating, and the main body 10 It is possible to efficiently heat the outer peripheral surface of the fitting cylindrical portion 20 of the lid member 3 and the inner peripheral surface of the ring member 11 that sandwich the upper end portion of the lid member 3. When the container body 2B having such a folded portion 50 is formed, the folded portion 50 is previously formed in the main body portion 10B, and this is set in the molds 31 and 32, and the ring is inserted by insert injection. It can be easily formed by forming the member 11.

  Moreover, like the soft container 1C shown in FIG. 16, the container main body 2C which formed the flange part 51 arrange | positioned between the collar part 23 and the ring member 11 in the upper end part of the main-body part 10C is used, and this container main body 2C is covered with a lid | cover. The lid member 3 can be hermetically fused to the ring member 11 through the flange portion 51 by high-frequency induction heating of the flange portion 51 in a state where the member 3 is fitted. In this case, the lid member 3 can be pressed downward by the induction coil 41, and the flange portion 51 can be sandwiched between the lid member 3 and the ring member 11, and the pressure member for sandwiching the flange portion 51 In addition, it is preferable because a separate driving means is not required. Further, not only the upper end portion of the main body portion 10 disposed between the outer peripheral surface of the fitting cylinder portion 20 of the lid member 3 and the inner peripheral surface of the ring member 11, but also the flange portion 51 is heated by high-frequency induction heating, The resin part of the lid member 3 and the ring member 11 facing each other can be efficiently heated. When molding the container body 2B having such a flange portion 51, the flange portion 51 is formed in the main body portion 10C in advance, and this is set in the dies 31, 32, and the ring is inserted by insert injection. It can be easily formed by forming the member 11.

  In the present embodiment, a conductive thin film is used because the upper end portion of the main body 10 is heated by high-frequency induction heating and the lid member 3 is hermetically fused to the ring member 11 via the main body 10. Although the soft film provided with 10a was used, when the main body part 10, the lid member 3, and the ring member 11 are fused by heat sealing or ultrasonic sealing, a single layer or multiple layer soft film made of a synthetic resin film is used. It is also possible to use a film. In this case, the synthetic resin material can be extruded from the mold into a cylindrical shape, and the body portion 10 can be manufactured by cutting the synthetic resin material into an appropriate length. Alternatively, the extruded cylindrical resin material can be molded into the mold. It is also a preferred embodiment that the discharge port 21 is integrally formed on the upper part of the main body 10 by blow molding, and the lid member 3 and the ring member 11 are omitted. Further, the ring member 11 is integrally formed on the upper end portion of the main body portion 10 by insert injection. However, the ring member 11 is manufactured separately from the main body portion 10 by an injection molding apparatus or the like, and heat sealed to the upper end portion of the main body portion 10. It can also be fused by an ultrasonic seal or a high frequency induction seal. In this case, the upper end portion of the main body 10 is temporarily fixed to the inner peripheral surface of the ring member 11 by fusion, and the lid member 3 is fitted to the ring member 11, and then the ring member 11 and the lid member 3 are fitted. It is also possible to heat the upper end portion of the main body portion 10 disposed between them by high-frequency induction heating and to fuse the ring member 11 and the lid member 3 in an airtight manner via the main body portion 10.

Perspective view of soft container filled with contents Exploded perspective view of main part of soft container Longitudinal sectional view of the main part of a soft container filled with contents Longitudinal longitudinal sectional view of the vicinity of the ring member of a soft container filled with contents Side view of the lid member with the sealing film removed Longitudinal sectional view showing the laminated structure of the soft film that constitutes the main body Sectional view taken along line VII-VII in FIG. 3 before filling the contents FIG. 7 equivalent view showing a sealing portion of another configuration Illustration of insert injection (a)-(d) is explanatory drawing of the method of filling and sealing the contents with respect to a soft container Explanatory drawing in the initial stage of filling the contents Explanatory drawing in the middle of stoppering of the lid member against the container body Explanatory drawing in the middle of stoppering of the lid member against the container body Explanatory drawing at the time of fusion of the lid member to the container body Longitudinal longitudinal sectional view of the vicinity of the ring member of the soft container of another configuration Longitudinal longitudinal sectional view of the vicinity of the ring member of the soft container of another configuration Longitudinal sectional view of a sealing material filling container according to the prior art

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Soft container 2 Container main body 3 Cover member 4 Sealing film 5 Contents 10 Main body part 10a Thin film 10b Resin film 10c Resin film 11 Ring member 11a Fitting part 12 Sealing part 12a Guide part 12b Horizontal part 13 Upper end opening part 14 Ring Part 15 Container side fitting part 16 Fitting groove 17 Corner part 18 Hooking hole 20 Fitting cylinder part 20a Fitting part 21 Discharge port 22 Lid body 23 Lim part 24 Lid side fitting part 25 Locking claw 26 Discharge part 27 Taper Part 28 Groove part 30 Mandrel 31 Mold 33 Molding space 40 Injection tube 41 Inductive coil 10A Main body part 12A Sealing part 12c Guide part 1B Soft container 2B Container main body 10B Main body part 50 Folding part 1C Soft container 2C Container main body 10C Main body part 51 Flange Part

Claims (18)

A tubular soft container having a cylindrical main body that can be filled with contents from the upper side, and a sealing part that is formed by hermetically fusing the lower end of the main body flatly,
A guide portion that is inclined or curved upward is formed at both ends of the upper edge of the sealing portion on the main body side.
A soft container characterized by that.   The soft container according to claim 1, wherein an inclination angle of the guide portion before filling of the contents is set to 40 ° to 65 ° with respect to a middle portion of the upper edge portion of the sealing portion.   The soft container according to claim 1, wherein a radius of curvature of the guide portion before filling of the contents is set to 15 to 25 mm.   The soft container according to any one of claims 1 to 3, wherein a hooking hole for hooking the soft container on a hook and displaying it in an inverted manner is formed in the sealing portion.   A ring member is fusion-fixed to the upper end part of the said main-body part, the lid member which has the discharge outlet of the content is fitted to a ring member, and both are air-tightly fixed by fusion. The soft container as described in the item.   The main body is composed of a soft film in which resin layers are provided on both sides of a conductive thin film, and a ring member is integrally provided by insert injection on the outer periphery of the upper end of the main body. A main body disposed between the fitting portions of the fitting member having a fitting cylinder portion to be fitted and a discharge port for the contents, and having the fitting cylinder portion of the lid member fitted in the ring member. The soft container according to any one of claims 1 to 5, wherein the lid member is hermetically fused and fixed to the ring member via the main body portion by high-frequency induction heating of the upper end portion of the portion.   The folded part is formed in the main body between the fitting part of the lid member and the ring member, and the folded part is hermetically fused to the ring member via the folded part by high frequency induction heating. The soft container as described in the item.   A flange portion extending to the upper surface side of the ring member is formed on the lid member, a flange portion is formed on the outer peripheral portion of the upper end of the main body portion between the flange portion and the ring member, and the flange portion is heated by high frequency induction heating. The soft container according to claim 6 or 7, wherein the lid member is hermetically fused to the ring member.   The soft film according to any one of claims 6 to 8, wherein a resin layer having compatibility with the ring member and the lid member is provided on each of an outer surface side and an inner surface side of the main body in the soft film. container.   The soft container according to claim 9, wherein polyethylene is used as the compatible resin. It is a method for manufacturing a tubular soft container having a cylindrical main body that can be filled with contents from the upper side, and a sealing part that seals the lower end of the main body,
When the sealing portion is formed by fusing the lower end portion of the main body portion in a flat manner and fusing to the lower end portion of the main body portion, it is inclined or curved upward at both ends of the upper edge of the main body portion side of the sealing portion. A method for producing a soft container, characterized by fusing so that a guiding portion is formed.   A cylindrical main body made of a soft film with resin layers laminated on both sides of a conductive thin film, a ring member provided on the outer periphery of the upper end of the main body, and a lower end of the main body are flattened. A tube-shaped soft container having a sealing portion that is hermetically fused and has a main body portion set in a mold and a ring member integrated with an outer periphery of the upper end of the main body portion by insert injection. When forming the sealing part by molding and then overlapping the lower end of the main body flat and fusing to the lower end of the main body, facing upward at both ends of the upper edge of the main body of the sealing part A method of manufacturing a soft container, characterized by fusing so that an inclined or curved guide portion is formed. A cylindrical main body made of a soft film with resin layers laminated on both sides of a conductive thin film, a ring member provided on the outer periphery of the upper end of the main body, and a lower end of the main body are flattened. A contents-containing soft container in which a container body having a sealing portion that is hermetically fused is filled with the contents and hermetically sealed with a lid member,
The main body is set in a mold, and a ring member is integrally formed on the outer periphery of the upper end of the main body by insert injection. Thereafter, the lower end of the main body is flattened and sealed to the lower end of the main body by fusing. A manufacturing process of a container main body that is fused so that a guide portion that is inclined or curved upward is formed at both ends of the upper edge of the main body portion side of the sealing portion when the stop portion is formed;
A manufacturing process of a lid member having a fitting cylinder part fitted inside the ring member and a discharge port of contents;
A sealing step of adhering a sealing film for sealing the discharge port to the lid member;
While holding the ring member and supporting the container main body vertically, the nozzle is inserted into the bottom of the main body, and the nozzle is moved out of the container main body while discharging the contents from the nozzle. The body of the main body disposed between the lid member and the fitting portion of the ring member is filled with the contents and the fitting cylindrical portion of the lid member having the sealing film attached is fitted into the ring member. A content enclosing step in which the upper end is heated by a high frequency induction heating device and the lid member is hermetically fused to the ring member via the main body,
A soft container with contents, which is manufactured through the process.   In the container manufacturing process, a folded part is formed at the upper end of the main body part, and this is set in a mold to produce a container body, and in the contents enclosing process, the folded part is heated by a high frequency induction heating device, The content-containing soft container according to claim 13, wherein the lid member is hermetically fused to the ring member via the folded portion.   In the container manufacturing process, a flange portion extending outward is formed at the upper end portion of the main body, and this is set in a mold to manufacture the container main body. In the contents sealing step, the flange is formed by a high frequency induction heating device. The contents-containing soft container according to claim 13, wherein the contents-containing soft container is formed by heating and hermetically fusing the lid member to the ring member via the flange portion.   The content of any one of Claims 13-15 which provided the resin layer which has compatibility with a ring member and a cover member in the outer surface side and the inner surface side of the main-body part in the said soft film, respectively in laminated form. Soft container for container.   The content-containing soft container according to claim 16, wherein polyethylene is used as the compatible resin. In the content enclosing step, after the fitting tube portion of the lid member is internally fitted to the ring member, the ring member is configured such that the upper end portion of the main body portion is sandwiched between the fitting portion of the ring member and the lid member. Alternatively, the upper end portion of the main body portion is heated by a high-frequency induction heating device while pressurizing the lid member, and the lid member is hermetically fused to the ring member via the main body portion. A soft container containing the contents described in the item.

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