JP2008207860A - Synthetic resin-made spouting container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin-made spouting container with excellent convenience in order to realize a container structure for easily spouting a liquid content of high viscosity remaining on a bottom part, even in a spouting container of the own-weight flowing-out container. <P>SOLUTION: The bottomed and cylindrical synthetic resin-made spouting container which is blow-molded with a cylindrical mouth part of an upper end part of the barrel part being erected therefrom is formed of a laminated body composed of an outer layer for forming an outer shell and an inner layer forming a flexible inner bag inside the outer layer. A part in a vicinity of a bottom part including a bottom surface forms a peelable area with the outer layer and the inner layer being peelably layered, and a part except the peelable area forms an adhesive area with the outer layer and the inner layer being stuck and fixed to each other by an adhesive layer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a synthetic resin pouring container by blow molding having an outer layer forming an outer shell and an inner layer forming a flexible inner bag inside the outer layer.

Synthetic resin blow molded containers have been conventionally used for various purposes, and are widely used as dispensing containers for cosmetics.
Among them, when the viscosity of the cosmetic is high, when the remaining amount of the content liquid decreases, even if the container is inverted and shaken, it is difficult for the substantial amount of the content liquid to adhere to the bottom and be poured out. Combined with the high cost of cosmetics, there is a need to provide containers that can dispense the content liquid to the end.

For example, Patent Document 1 describes an invention relating to a squeeze container using a so-called delami bottle having an outer layer that forms an outer shell and an inner layer that is peelably laminated on the outer layer to form a flexible inner bag. Therefore, the remaining amount of the contents is reduced by the arrangement position of the adhesive band for bonding the outer layer and the inner layer in a vertical band shape and the lateral width thereof.
JP 2003-72864 A

  The delamination bottle described above is a configuration in which the inner layer is deflated and deformed in the entire container to pour out the content liquid, and the content liquid is poured out by a squeeze container that squeezes the body part, or a manual pump is attached to the mouth tube part. It is assumed that it is used as a pumping-out container, and the self-weight outflow-type container that is used by inverting the container and spilling the contents liquid by its own weight or by shaking up and down It does not apply.

  The present invention has an object to create a container structure for easily pouring out a high-viscosity content liquid remaining in the bottom portion even if it is a self-weight spill type pouring container, and is an easy-to-use synthetic resin pouring container The purpose is to provide.

Among the present invention for solving the above technical problems, the means of the invention according to claim 1 is:
In the bottomed cylindrical shape, in the synthetic resin pouring container by blow molding in which the mouth tube portion is erected on the upper end portion of the trunk portion,
A laminated body having an outer layer forming an outer shell and an inner layer forming a flexible inner bag inside the outer layer;
The vicinity of the bottom including the bottom is a peeling region in which the outer layer and the inner layer are detachably laminated,
The part excluding the peeled area is an adhesive area where the outer layer and the inner layer are bonded and fixed with an adhesive layer,
It is in.

  In the case of a type of dispensing container that is used by allowing the contents liquid to fall spontaneously in an inverted state and then pour it out from the mouth tube section, when the viscosity of the contents liquid is high, the remaining amount is a certain amount Then, the content liquid remaining in the portion from the lower end of the body to the bottom of the container remains attached to the inner wall surface from the lower end of the body to the bottom, even when the container is inverted, in the direction of the mouth tube It becomes difficult to move to.

  Therefore, according to the above-described configuration of the first aspect, when the container is inverted and shaken up and down by hand, an inertial force acts on the content liquid adhering to the inner peripheral surface in the vicinity of the bottom portion, As a result of the above, peeling of the inner layer proceeds from the bottom surface of the bottom, and the peeled inner layer is deformed in a reverse shape in a convex shape toward the mouth tube part together with the content liquid adhering in the vicinity of the bottom.

  Here, since the peeling region is limited to the vicinity of the bottom, there is a limit to the reversal deformation of the inner layer, but the adhered content liquid is largely separated from the inner layer by the inertia force. Then, it moves further in the direction of the mouth tube part, and the content liquid can be poured out from the mouth tube part.

  Here, even if the formation range of the separation region is too narrow or too wide, the attached content liquid will not be separated and moved to the mouth tube part due to the deformation behavior of the inner layer, but its proper range Can be determined in consideration of the shape of the liquid content, the diameter in the vicinity of the bottom, or by performing a confirmation test, including the lower end of the barrel.

  In the adhesion region, the outer layer and the inner layer are usually adhered and fixed with an adhesive layer over the entire circumference, but depending on the purpose of use, for example, a vertical belt-like adhesive layer is provided at an axially symmetric position with respect to the central axis of the container. It can also be partially bonded by lamination or the like.

  According to a second aspect of the present invention, in the first aspect of the invention, the outer layer and the inner layer can be peeled in advance at the bottom seal portion by pinch-off, and the outside air can be introduced between the outer layer and the inner layer through the peeled portion. It is in making it a proper structure.

In order to use the deformation behavior of the inner layer in the peeling region, it is preferable to advance the peeling in as wide a region as possible in advance. In the bottom seal part formed when pinching off the lower end part, the outer layer and the inner layer are peeled in advance, and the outside air is introduced between the outer layer and the inner layer through this peeling part,
The container can be inverted and shaken up and down by hand to start the peeling of the inner layer from this peeled part. It can be deformed rapidly in the direction of the part, and separation and movement of the attached content liquid can be achieved more easily.

  Along with the reversal deformation of the inner layer, the attached content liquid starts abrupt movement in the direction of the mouth tube portion, but since the peeling region is limited to the vicinity of the bottom, this reversal deformation of the inner layer When the operation is stopped, the adhering content liquid is largely separated from the inner layer by the inertial force, moves toward the mouth tube portion, and can be poured out from the mouth tube portion.

In the invention according to claim 2, it is possible to easily start the peeling of the inner layer, and to introduce the outside air into the peeling portion to eliminate the negative pressure state and to rapidly remove the peeled inner layer toward the mouth tube portion. It can deform | transform and can isolate | separate and move the attached content liquid more easily.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described along examples with reference to the drawings.
1 to 3 show an embodiment of a synthetic resin blow-molded container according to the present invention. FIG. 1 is a front view showing the container 1 partially cut vertically, and FIG. FIG. 3 is an explanatory view showing an example of how the container 1 is used.

  This container 1 is a casing having a mouth tube part 2, a shoulder part 3, a cylindrical body part 4, and a bottom part 5, an outer layer 11 forming an outer shell, and an inner layer 12 forming a flexible inner bag. The laminated structure is composed of an adhesive layer 13 that adheres and fixes the outer layer 11 and the inner layer 12.

  And in the peeling area P from the bottom part 5 including the bottom face 5a to the lower end part of the body part 4, the outer layer 11 and the inner layer 12 are laminated so as to be peelable, and in the adhesion area A thereabove, the outer layer 11 and the inner layer 12 are The adhesive layer 13 is bonded and fixed.

  FIG. 2 (a) is an explanatory view showing the bottom portion 5 in the vicinity of the seal portion 6 formed by the pinch-off portion of the split mold during blow molding. By applying pressure (see the white arrow in FIG. 2A), the outer layer 11 and the inner layer 12 are partially peeled, and the outer layer is brought into a so-called bottom crack state as shown in FIG. An outside air introduction portion 7 for introducing outside air is formed between the inner layer 12 and the inner layer 12.

  Normally, this type of container 1 is used in an inverted state where the content liquid C is naturally dropped in a fluid state or shaken up and down to be poured out from the mouth tube portion 2, but the viscosity of the content liquid C is high. In this case, as shown in FIG. 1, when the remaining amount reaches a certain level, even if the container 1 is turned upside down, the lower end of the body 4 against the gravity or inertial force acting on the attached content liquid C The action of the adhering force on the portion extending from the bottom surface 5a to the bottom portion 5 is increased, and the movement in the direction of the mouth tube portion 2 cannot be performed, which makes it difficult to pour out.

  Therefore, according to the container 1 of the present embodiment, as shown in FIG. 3, when the container 1 was turned upside down and quickly swung up and down by hand (in the direction of the white arrow in FIG. 3), it adhered. Due to the inertial force acting on the content liquid C, the inner layer 12 is peeled off from the bottom surface 5a of the bottom 5 and the peeling region P while introducing the outside air from the outside air introduction portion 7 starting from the portion that has been peeled off in advance. As it progresses, the peeled inner layer 12 together with the attached content liquid C is deformed in a convex and inverted manner in the direction of the mouth tube portion 2.

  When the peeling of the inner layer 12 reaches the boundary with the adhesion area A, the reverse deformation of the inner layer 12 in the peeling area P stops. At that time, the content liquid C is further displaced in the direction of the mouth tube part 2 by the inertial force. Therefore, a chopping force is applied to the inside of the content liquid C, leaving a very small part of Cb attached to the inner layer 12, and most of the Ca is separated from the inner layer 12 and separated from the mouthpiece part 2. Move to the vicinity. And most Ca of the content liquid C by which adhesion to the bottom part 6 vicinity was eliminated in this way can be easily poured out from the mouth tube part 2.

  The blow-molded container of this example uses a die for coextrusion molding, and a cylindrical adhesive layer 13 is coaxially arranged between a cylindrical outer layer 11 and an inner layer 12 that are continuously extruded. It can be obtained by blow molding a multi-layer parison that is formed into a core shape and merged and laminated.

Here, the intermittent formation of the adhesive layer 13 in the laminated parison is performed by controlling the pressurization and depressurization of the accumulator attached to the resin supply unit for the adhesive layer 13 constituted by an extruder or the like, or the adhesive layer 13. This can be achieved by providing a blocking means for blocking the flow path clearance of the flow path to be formed at a predetermined timing for a predetermined time.
For example, the outer layer 11 is made of polypropylene resin and the inner layer 12 is made of nylon resin having low compatibility with the polypropylene resin, thereby forming an adhesive region and a non-adhesive region in the extrusion direction of the multilayer parison to be extruded. The adhesion area A and the peeling area P of the container 1 of this embodiment can be used.

As mentioned above, although the embodiment of the present invention has been described according to the example, the present invention is not limited to this example.
For example, in this embodiment, the height range of the peeling region P disposed in the vicinity of the bottom portion 5 includes the lower end portion of the body portion 4 and is approximately ½ of the diameter of the body portion 4. It can be appropriately determined in consideration of the viscosity of the content liquid and the shape such as the diameter near the bottom 5.

  As described above, the synthetic resin pouring container of the present invention is capable of pouring a highly viscous content liquid almost to the end by providing a peeling region where the inner layer peels near the bottom of the container. It is expected to be used in a wide range of fields as a dispensing container for liquid contents.

It is a front view which partially shows one Example of the container of this invention longitudinally. (A) is explanatory drawing which shows the seal | sticker part vicinity of the bottom part of the container of FIG. 1 longitudinally, (b) shows the state which peeled the outer layer and inner layer of the seal | sticker part by (a). It is explanatory drawing which shows an example of the usage condition of the container of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1; Container 2; Mouth part 3; Shoulder part 4; Trunk part 5; Bottom part 5a; Bottom face 6; Seal part 7; Outside air introduction part 11: Outer layer 12; Inner layer 13; Adhesive layer P; ; Content liquid Ca; Most of (the attached content liquid) Cb; Some (of the attached content liquid)

Claims (2)

It has a bottomed cylindrical shape, with the mouth tube portion (2) standing upright at the upper end of the body portion (4), and an outer layer (11) that forms an outer shell, and a flexible inner layer inside the outer layer (11). A laminated body having an inner layer (12) that forms a bag, and the vicinity of the bottom (5) including the bottom surface (5a) is a peeling region (P) in which the outer layer (11) and the inner layer (12) are laminated so as to be peeled, A synthetic resin pouring container by blow molding, characterized in that the portion excluding the peeling region (P) is an adhesive region (A) in which the outer layer (11) and the inner layer (12) are bonded and fixed with an adhesive layer (13) . Peel off the outer layer (11) and the inner layer (12) in advance at the seal portion (6) of the bottom (5) by pinch-off, and introduce outside air between the outer layer (11) and the inner layer (12) through the peeling portion. A synthetic resin pouring container with a possible configuration.

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