JP2005187036A - Blow molded standing thin-walled container and parison for molding container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blow molded standing thin-walled container which can be easily opened. <P>SOLUTION: The blow molded standing thin-walled container comprises a thin-walled body wall part (1) which partitions and forms a filling space for a content and is capable of performing volume reduction of the filling space by bringing the facing side walls into close contact with each other, and a thin-walled bottom wall part (2) integrally connected to the lower end of this body wall part (1) and standing the body wall part regardless of existence of the content. A spouting part (3) forming a spouting path through which the content in the container passes is provided on either the body wall part (1) or the bottom wall part (2). The spouting part (3) is composed of a base part (3a) which is the same substance as that of either the body wall part (1) or the bottom wall part (2), and a plug body (3b) which is connected with this base part (3a) through a cutting scheduled line (L) and makes opening possible by tearing along the cutting scheduled line (L). The whole of or at least the planned cutting line (L) of the plug body (3b) is composed of a different substance from that of the base part (3a). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a blow molded standing thin-walled container suitable for replacement of a pouch composed of a synthetic resin film or a metal film, and a parison for molding the container. I want to open it.

  Deferred containers that store shampoos, rinses, liquid soaps, and cosmetics are generally equipped with a dispenser that allows the appropriate amount of contents to be dispensed. As the container, a thin blow bottle obtained by blow molding a synthetic resin film or a metal film and a blow-molded pouch or polyolefin synthetic resin is used (for example, see Patent Document 1).

JP-A-11-130112

  The conventional refill containers as described above are usually opened by using a tool such as a bag or by tearing off a stopper (knob piece) for breaking opening. In particular, the stopper is torn off. Although the container of the type that is opened in (1) has the advantage that a tool such as a bag is not required, the resin may be stretched when torn, leaving a problem in that it is difficult to open.

  An object of the present invention is to propose a novel blow-molded standing thin-walled container that can be easily and reliably opened without accompanying resin elongation and a parison for molding the container.

The present invention provides a thin body wall portion that partitions the filling space for the contents and allows the side walls facing each other to closely contact each other to reduce the filling space, and is integrally connected to the lower end of the body wall portion. A blow-molded standing thin-walled container comprising a thin-walled bottom wall that raises the body wall with or without contents.
In the body wall part or bottom wall part, a pouring part that forms a pouring path for passing the contents in the container is provided,
The pouring part comprises a base made of the same material as the body wall or bottom wall, and a plug that is connected to the base via a planned cutting line and can be opened by tearing along the planned cutting line. ,
The plug body is a blow molded standing thin-walled container characterized in that all or at least a line to be cut is made of a material different from that of the base.

  The line to be cut is particularly advantageously adapted to be provided around the pouring path in a direction parallel to the axis of the container.

  The line to be cut preferably has a V-notch that facilitates tearing of the plug at at least one point on the line.

  Moreover, the said extraction | pouring part is good to provide the corner | angular part used as a base point at the time of a wall part protruding toward the outer side along a longitudinal direction, and tearing off a plug body at at least one place of the circumference | surroundings.

  Furthermore, it is preferable that the pouring portion is provided with an elongated convex portion serving as a base point when the pouring portion is crushed at at least two positions opposite to the wall portion, and the elongated convex portion is provided on the pouring portion. A broken line is formed in the longitudinal direction.

  It is preferable that the pouring part has a plurality of annular V notches arranged sequentially from the base part to the plug body.

  The plug body may be provided with a handle formed integrally with the plug body, and the plug body itself may be constituted by a thin piece covering the opening of the base. Furthermore, as a tapered shape in which the pouring portion is narrowed toward the tip, a plurality of scheduled cutting lines that are equivalent to the scheduled cutting lines and arranged at intervals from each other can be provided on the body portion.

  Either the whole of the plug body or the base, or at least the line to be cut can be made of a blend material containing at least 30% of the material constituting the other. It is good also as a material which blended the said adhesive material in what consists of the adhesive material which connects a body to the said base, or any one.

Further, the present invention integrally forms a thin body wall portion that forms a filling space for the contents and allows the opposing side walls to closely contact each other to reduce the volume in the filling space, and a lower end of the body wall portion. A parison for forming a blow-molded standing thin-walled container consisting of a thin-walled bottom wall portion that stands up with or without the presence or absence of contents connected to the body wall portion,
The parison is a parison for molding a blow-molded standing thin-walled container having a different material layer made of a material different from that of the main body.

  In the parison configured as described above, it is desirable that the dissimilar material layer is continuously extended along the longitudinal direction of the parison body or provided partially.

  By configuring the entire plug body or at least the line to be cut with a material different from the base portion, the plug body can be torn off without the resin extending, and easy opening is possible.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIGS. 1A and 1B show an embodiment of a blow molded standing thin-walled container made of synthetic resin according to the present invention, where FIG. 1A is a front view and FIG. 1B is a side view.

  In the figure, reference numeral 1 denotes a thin body wall portion that partitions the filling space for the contents and enables the volume of the filling space to be reduced by bringing the opposing side walls into close contact with each other. A thin-walled bottom wall portion 3 for allowing the body wall portion 1 to stand up regardless of the presence or absence of contents is a pouring portion integrally provided at the upper end corner of the body wall portion 1.

  The pouring part 3 has a pouring path through which the contents in the container pass, and is connected to the base part 3a made of the same material as that of the body wall 1 through the cutting planned line L. The plug body 3b is made of a material different from that of the base portion 3a.

  Reference numeral 4 denotes an elongated convex portion (rib-shaped one) provided along the longitudinal direction of the extraction portion 3. The convex portion has a cross section as shown in FIG. 2 (a), and when the pouring portion 3 is crushed as shown in FIG. 2 (b) in order to open the container, the convex portion 4 has a broken line. It becomes a base point for forming.

  Furthermore, 5 is a filling part which is provided in the upper part of the trunk | drum wall part 1, and supplies the contents to the filling space of a container. The container is sealed by heat sealing the open end of the filling portion 5 after filling the contents.

  The thin-walled container having the above-described configuration in which the plug 3b is made of a material different from the base 3a can reliably tear the plug 3b from the base 3a when the container is opened.

  In the above embodiment, the entire plug body 3b is made of a material different from that of the base portion 3a. However, only the line L may be made of a different material by giving a width to the line to be cut L.

  It is particularly preferable that the scheduled cutting line L is provided along the periphery of the extraction path in a direction parallel to the axis P of the container.

  This is because the plug body 3b is more easily torn off by providing the planned cutting line L in a direction parallel to the axis P of the container.

  The to-be-ruptured line L can make the cross section into a V-shaped groove type cross section (V notch) in the full length or a part, and it becomes easy to tear off.

FIG. 3 shows another embodiment of the container according to the present invention.
In this example, a plurality of cutting plans arranged in a tapered shape in which the pouring portion 3 (pouring path) is narrowed toward the tip and arranged in a manner equivalent to the planned cutting line L (different materials) and spaced apart from each other. intended structure in which a line L _1, L _2, such containers, can change the aperture size of the spout unit 3 by tearing choose selectively either L～L ₂ By fitting the mouth of the container to be refilled, the contents can be supplied efficiently.

  4 (a) and 4 (b) show a thin container having an air displacement pipe 6 extending in parallel with the pouring nozzle 3, and the stopper 3b is made of a different material from the base 3a, and the handle 7 is integrated with the stopper 3b. In addition to the provision, a corner portion 8 is provided on the lower side of the pouring portion 3 so that the wall portion protrudes outwards along the longitudinal direction and is sharpened to serve as a base point when the plug body 3b is torn off.

  In the container having the above-described configuration, the stress is concentrated on the corner portion 8 by pulling up the handle 7, and the plug body 3 b can be easily torn along the planned cutting line L with the portion as a base point.

  FIG. 5 shows a configuration in which a plurality of annular V-notches 9a, 9b,... Arranged in sequence from the base 3a to the plug 3b are provided in the pouring part 3.

  This container can be torn along the planned cutting line L by gripping the handle 7 and rotating it together with the plug body 3b. However, in this type of container, depending on the state of resin stretching during blow molding, In this case, the plug 3b alone cannot be made of a different material, and there is a concern that the scheduled cutting line L may be displaced from a predetermined position, and in this case, there is a possibility that reliable tearing cannot be performed.

  If a plurality of V notches 9a, 9b,... Are arranged, the planned cutting line L will be located in any one of the V notches 9a, 9b,. The plug 3b is surely torn off.

  FIG. 6 shows an example in which the plug 3b having the handle 7 is constituted by a thin piece covering the opening of the base 3a. Since this container can reduce the part which becomes a different material, there exists an advantage which can perform blow molding easily and can aim at reduction of the material (part for a different material).

  FIG. 7 shows a configuration in which a line 10 of a different material similar to that of the plug 3b is formed on the body wall 1 of the container, and a protective part 11 is provided on the upper end thereof. By providing a line 10 of a different material on the body wall 1 of the container, it is usually possible to use a different material part that becomes a burr as a material constituting a part of the container, and as a result, there is less burr. Productivity can be improved.

  The plug 3b can be applied as a whole or a line to be cut which is made of a blend material containing at least about 30% of a material constituting the base 3a (same as the material of the container body).

  When the base portion 3a including the main body of the container is molded from medium density polyethylene, all of the plug body 3b or the line to be cut L can be molded from polypropylene, and at this time, the polypropylene has a medium density of at least about 30%. By blending the polyethylene, a binding strength that does not inhibit the tearing of the plug 3b can be obtained.

  As the resin constituting the container, in addition to the above-mentioned medium density polyethylene, polyolefin resin such as low density polyethylene, high density polyethylene and polypropylene, polyester resin such as polyethylene terephthalate, or ethylene suitable for forming a barrier layer Vinyl alcohol copolymer resin, nylon resin, etc. can be used alone or in combination, and the resin constituting the plug (including the line to be cut) does not hinder tearing of the plug from the base. Various known resins can be used as long as the resin can obtain a degree of bonding strength.

  For the planned cutting line L, an adhesive resin that connects the base 3a and the plug 3b can be used as a different material.

  Specifically, for example, acid-modified polyolefin (for example, “Mitsui Chemicals”, “Mitsubishi Chemical Co., Ltd.”) can be bonded to any one of the incompatible resins so that the base 3a and the plug 3b can be bonded. A blended adhesive resin such as “Admer” or the like can be used, and thereby, the base 3a and the plug 3b, which are made of different materials, are bonded to each other. The adhesive strength is adjusted by changing the amount of the adhesive resin to be blended. Note that the base 3a or the plug 3b can be formed of only an adhesive resin, but has an adhesive property that does not hinder tearing with respect to the resin constituting either the base 3a or the plug 3b. It is also possible to employ a resin that can be used (one type or a blended type is also possible).

  The container according to the present invention is basically formed by direct blow molding. When the plug body 3b and the cutting scheduled line L are made of different materials, the different material layers (continuously stretched or A parison as shown in FIGS. 8A to 8D formed intermittently) is used. In particular, in the case of using the one shown in FIG. 8A in which the different material layer exists in the longitudinal direction of the parison (the height direction of the parison), a mold having an inclination with respect to the axis of the container is used. By using it, only the plug 3b can be formed as a different material (except for the container shown in FIG. 7).

  A thin-walled container that can be opened easily and cleanly by tearing off the stopper can be provided.

The blow molding standing thin container according to this invention is shown, (a) is a front view, (b) is a side view. FIG. 2 is a cross-sectional view of a dispensing portion of the container shown in FIG. 1, (a) is a view showing a state before being crushed, and (b) is a view showing a crushed state. It is the figure which showed other embodiment of the container according to this invention. It is the figure which showed other embodiment of the container according to this invention, (a) is a side view, (b) is the principal part enlarged view of a front. It is the figure which showed other embodiment of the container according to this invention. It is the figure which showed other embodiment of the container according to this invention. It is the figure which showed other embodiment of the container according to this invention. (A)-(d) is an external appearance perspective view of a parison suitable for using for molding a container according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body wall part 2 Bottom wall part 3 Outgoing part 3a Base part 3b Plug body 4 Convex part 5 Filling part 6 Air replacement pipe 7 Handle 8 Corner | angular part 9a, 9b ... Ring V notch 10 Dissimilar material line 11 Protection part L Scheduled cutting Line P The axis of the container

Claims (14)

A thin-walled body wall portion that partitions the filling space for the contents and enables the volume of the filling space to be reduced by bringing the opposing side walls into close contact with each other, and is integrally connected to the lower end of the body wall portion. A blow-molded standing thin-walled container consisting of a thin-walled bottom wall that stands up with or without contents.
In the body wall part or bottom wall part, a pouring part that forms a pouring path for passing the contents in the container is provided,
The pouring part comprises a base made of the same material as the body wall or bottom wall, and a plug that is connected to the base via a planned cutting line and can be opened by tearing along the planned cutting line. ,
The blow molded standing thin-walled container, wherein the plug body is made of a material different from the base part in its entirety or at least at a line to be cut.   The blow-molded standing thin container according to claim 1, wherein the scheduled cutting line is provided along the periphery of the pouring path in a direction parallel to the axis of the container.   The blow-molded standing thin container according to claim 1 or 2, wherein the line to be cut has a V-notch that facilitates tearing of the plug at at least one point on the line.   The blow portion according to any one of claims 1 to 3, wherein the pouring portion has a corner portion serving as a base point when the wall portion protrudes outward along the longitudinal direction and tears off the plug at at least one place around the pouring portion. Molded standing thin container.   The blow molding standing thin wall according to any one of claims 1 to 4, wherein the pouring portion has elongated projections serving as a base point when the pouring portion is crushed at at least two positions opposite to the wall portion. container.   The blow-molded standing thin container according to claim 5, wherein the elongate convex part forms a broken line with respect to the longitudinal direction of the pouring part.   The blow-molded standing thin container according to any one of claims 1 to 6, wherein the pouring part has a plurality of annular V-notches arranged sequentially from the base part to the stopper.   The blow molded standing thin-walled container according to any one of claims 1 to 7, wherein the plug has a handle formed integrally with the plug.   The blow molded standing thin-walled container according to any one of claims 1 to 8, wherein the plug body is formed of a thin-walled piece that covers the opening of the base.   The pre-pour portion has a tapered shape that narrows the pour route toward the tip, and has a plurality of cut lines arranged on the trunk portion that are equivalent to the cut lines and arranged at intervals. The blow-molded standing thin container according to any one of claims 1 to 9.   11. The blow molded standing thin-walled container according to claim 1, wherein any one of the plugs or the base, or the line to be cut is made of a blend material containing at least 30% of a material constituting the other.   Either one of the plug body or the base part, or the planned cutting line is made of an adhesive material for connecting the plug body to the base part or a material blended with the adhesive material. The blow molded standing thin container as described. A thin-walled body wall portion that forms a filling space for the contents and allows the volume of the filling space to be reduced by bringing the opposing side walls into close contact with each other, and is integrally connected to the lower end of the body wall portion. A parison for molding a blow-molded standing thin-walled container consisting of a thin-walled bottom wall that stands up with or without contents.
The parison is a parison for forming a blow molded standing thin-walled container having a different material layer made of a material different from that of the main body on the main body.     14. The parison suitable for molding a blow molded standing thin container according to claim 13, wherein the dissimilar material layer extends continuously or partially along the longitudinal direction of the parison body.

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