JPH0948478A - Laminated peelable container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a support structure of a joint so that the joint attached to a pump dispenser is prevented from bending and peeling can be smoothly advanced even if there is a non-uniform and uneven adhered part on inner and outer layers. SOLUTION: A laminated peelable container A with an outer layer 1 and an inner layer 2 comprising synthetic resin materials which can be peeled off from each other and formed with an atmosphere inlet hole 8 on the outer layer 1 of the container includes a support of a joint 27 attached to a pump dispenser B formed on a container bottom.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a laminated peeling container.

[0002]

2. Description of the Related Art A pump dispenser is attached to a laminated peeling container in which an outer layer and an inner layer are made of a synthetic resin material that can be peeled from each other, and an atmosphere introduction hole is formed in the outer layer of the container.
2. Description of the Related Art A laminated release container has been known in which, when the container is used, the atmosphere is introduced through the air introduction hole together with the pouring of the contents to separate the inner layer and the outer layer.

[0003]

In the pump dispenser, a joint member is attached to the lower end of the valve seat cylinder in order to guide the content liquid to the valve seat cylinder of the pump when pouring out the content liquid. The conventional joint member is simply suspended from the lower end of the valve seat cylinder, and its lower end is free.

In a container in which the air introduction hole is provided in the outer layer of the mouth of the container, the peeling of the inner layer accompanying the pouring of the content liquid starts from the periphery of the air introduction hole and spreads in the circumferential direction and the axial downward direction. Therefore, the peeling deformation of the inner layer proceeds from one side of the container. As the pouring progresses, the peeled and deformed inner layer will be attracted to the content liquid and will collide with the joint.However, if there is strong adhesion between the inner and outer layers or uneven thickness of the inner layer, peeling and deformation in the circumferential direction will occur. Since the inner layer is further attracted by the relative delay and the progress of the pouring, the conventional joint may be curved as shown in FIG. The bending of the joint also became a factor that hinders smooth peeling and shrinkage deformation of the inner layer.

The present invention has as a technical object to solve these problems, prevents the joint from curving, and allows the peeling to proceed smoothly even if the inner and outer layers have uneven adhesion or uneven thickness. An object of the present invention is to provide a laminated release container having an improved joint support structure.

[0006]

In order to achieve the above-mentioned technical object, the present invention comprises an outer layer and an inner layer made of a synthetic resin material which can be peeled from each other, and has an atmosphere introduction hole in the outer layer of the container. In the formed delamination container, a container characterized in that a support portion of a joint attached to a pump dispenser is formed on the bottom surface of the container is adopted.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a laminated peeling container according to the present invention will be described with reference to the drawings. FIG.
In A, A is a laminated inner bag peeling container having an outer layer 1 and an inner layer 2, and is composed of a body portion 3, a shoulder portion 4, a mouth portion 5 and a bottom portion 6, and is formed by laminated extrusion blow molding. . B is a pump dispenser (hereinafter sometimes simply referred to as a pump) attached to the laminated release container.

The outer layer 1 maintains the appearance of the container and is made of high density polyethylene resin. The inner layer 2 is an inner bag that is peelable and deformable from the outer layer 1, and is made of a flexible resin such as nylon or EVOH. Needless to say, the material for the inner and outer layers of the container is not limited to the above resins as long as it is a resin material having the above functions.

Reference numeral 7 is an engaging piece for preventing the inner layer 2 from falling, and is formed by a mandrel of a blowing device during blow molding. Reference numeral 8 denotes an air introduction hole formed in the outer layer of the container mouth 5, which is punched by an appropriate method in a post process after blow molding. The position of the introduction hole is not limited to the container mouth portion, and may be provided in the shoulder portion 4 or the body portion 3 of the container. The air introduction hole 8 introduces the atmosphere between the inner layer and the outer layer according to the depressurization in the container during the pouring of the content liquid, and the peeling shrinkage of the inner layer is smoothly performed while maintaining the outer shape of the container. It is for making progress.

On the bottom portion 6 of the container, there is formed a ridge 9 which is formed by a pinch-off portion of a mold at the time of blow molding and is provided with a large number of alternately engaged portions which are press-fitted into opposing fusion layers. A circular concave portion 11 is formed in the center of the bottom surface 10 inside the bottom portion. The concave portion 11 forms a support portion of a joint attached to the pump B described later.

The formed delamination container is further subjected to an initial delamination treatment after forming the air introduction hole. In the initial delamination process, a predetermined amount of the initial delamination air is flown from the air introduction hole 8 to separate a part or the whole of the inner layer 2 from the outer layer 1, and then the air is press-fitted from the container mouth portion to remove the inner layer. 2 is returned to its original state so that it is adhered to the outer layer 1.

Next, the pump dispenser B will be described with reference to FIG. Pump B has a cap 20 and
It is composed of a cylinder 21 in which a piston and a valve device are mounted, and a piston operating member 22. A lid 23 having a through hole for inserting a piston rod is fitted on the upper end of the cylinder 21, and a mounting collar 24 is provided on the outer periphery of the upper portion.
Is provided. At the lower end of the cylinder 21, the valve seat cylinder 2
6 is provided, and a cruciform joint 27 having a length reaching the concave portion on the bottom surface of the container is fitted to the lower end of the valve seat cylinder 26. The joint 27 guides the content liquid into the valve seat cylinder 26 of the pump according to the suction of the pump at the time of pouring out the content liquid, and also guides the contraction deformation of the inner layer 2 so as to follow a constant deformation process. It works so that the pouring can be done smoothly until the end.

The pump B is provided with a cylinder mounting collar 2 after filling the content liquid in the laminated peeling container molded as described above.
4. The cap 20 is attached by fitting the cap 20 onto the container opening 5 via the packing 29. When the pump B is attached, the lower end of the joint 27 is inserted into and supported by the recess 11 at the bottom of the container. In the pump B, as in the conventional pump, the piston is moved up and down by the pressing operation of the operation member 22 and the restoring force of the compression spring elastically mounted in the cylinder, and a certain amount of the content liquid is changed according to the operation of the operation member 22. Is configured to dispense.

Next, the operation and effect of the present invention as compared with the conventional example will be described with reference to FIGS. When the operation member 22 of the pump B is pressed, a fixed amount of the content liquid is poured out and the inside of the inner layer 2 is depressurized, so that air is introduced between the inner and outer layers from the introduction hole 8 of the container mouth 5. The inner layer 2 is separated from the outer layer 1 and deforms. The peeling deformation of the inner layer 2 is
First, it starts from the periphery of the introduction hole 8 and spreads downward in the axial direction together with the circumferential direction.

With the progress of the pouring of the content liquid, the peeled and deformed inner layer 2a is attracted to the content liquid and moves inward. The inner layer 2a moving inward firstly contacts the cylinder 21 of the pump B, and as the contraction progresses, the valve seat cylinder and the portion that contacts the joint successively extend downward.

When the inner layer 2a abuts the pump member, movement of the inner layer 2a is impeded by the pump member, as shown in FIG. 4, and the intermediate portion 2b of the inner layer between the pump member and the outer layer is contained. It is attracted to the liquid and promotes peeling deformation of the inner layer 2.

If the inner and outer layers have strong adhesion and the inner layer 2 has an uneven thickness, peeling deformation in the circumferential direction is relatively delayed, and the tensile force applied to the joint 27 increases. As the pouring progresses, the abutting portion of the inner layer 2a is further attracted by the pressure reduction, and the lower end of the conventional joint 27a is free, so that the joint 27a may be curved as shown in FIG.

In the case of the present invention, since the lower end of the joint 27 is supported by the concave portion 11 of the bottom surface 10, it acts to force the peeling deformation of the inner layer 2 without bending the joint. Therefore, the peeling deformation is smoothly performed to the end, and the contracting deformation of the inner layer 2 is determined by the joint 27 because the shape of the deformation process is determined, so that the pouring of the content liquid is smoothly performed to the end.

In the above embodiment, the circular concave portion 11 is provided on the bottom surface 10 of the container as the support portion of the joint 27.
Compared with the conventional container, the bottom surface rises from the bottom seal portion by the depth of the recess. In order to avoid this, as shown in FIG. 5, four convex shapes 31 are formed so as to surround the central portion of the bottom surface. In this case, since the convex shape 31 can be provided avoiding the seal portion on the bottom surface, the bottom surface becomes flat as compared with the case where the concave portion 11 is provided, and the peripheral corners of the bottom surface are smoothly peeled off.

[0020]

Since the present invention is configured as described above, it has the following effects. Since the joint hung from the pump is supported by the bottom surface of the container, it is possible to prevent the joint from bending due to the contraction deformation of the inner layer.
Therefore, the peeled and deformed inner layer was supported at the center of the container, and the progress of peeling and the pouring of the content liquid were smoothly performed until the end.

[Brief description of drawings]

FIG. 1 is a drawing of a laminated peeling container with a pump according to the present invention, in which (a) is a front view with a partial cross section, and (b) is a cross sectional view taken along the line AA of FIG. is there.

FIG. 2 is a perspective view in which a part of the inner and outer layer materials of the body of the laminated peeling container is removed.

FIG. 3 is a partial cross-sectional front view for explaining the peeling deformation state of the inner layer of the present invention.

FIG. 4 is a cross-sectional plan view illustrating a peeling deformation state of the inner layer on a horizontal plane.

FIG. 5 is a perspective view showing another embodiment of the joint support portion.

FIG. 6 is a partial cross-sectional front view illustrating a peeling deformation state of an inner layer in a conventional example.

[Explanation of symbols]

 A laminated peeling container B pump dispenser 1 outer layer 2 inner layer 2a peeled inner layer 3 container body 4 container shoulder 5 container mouth 8 atmosphere introduction hole 20 cap 21 cylinder 22 operating member 26 valve seat cylinder 27 joint

Claims (1)

[Claims] 1. A laminated peeling container in which an outer layer and an inner layer are made of a synthetic resin material capable of peeling from each other, and an atmosphere introduction hole is formed in an outer layer of the container, and a joint attached to a pump dispenser on a bottom surface of the container. A laminated peeling container, characterized in that a supporting portion of (1) is formed.