JPH0724738U - Multi-layer press type container - Google Patents

Abstract

(57) [Summary] [Purpose] A multi-layer press type container that can discharge to the end without leaving the contents in the container. [Structure] In a multi-layer press type container in which an outer container 1 and an inner container 2 are molded by simultaneous molding, a sleeve 6 is attached to the upper part of the inner container 2. As the content 7 decreases, the lower portion of the content 2 regularly rises along the sleeve 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-layer pressure type container, and more particularly to a multi-layer pressure type container capable of reliably discharging a highly viscous content contained in an inner container to the end.

[0002]

[Prior art]

 A conventional pressing container is, for example, one shown in FIG. An outer container 50 has an inner container 51 fitted to the mouth of the outer container 50, and the inner container 51 is suspended in the outer container 50. A check valve body 52 for inflowing air is provided at the bottom of the outer container 50, which is closed when the outer container 50 is pressed and opened when the outer container 50 is restored. The outer container 50 is made of a flexible synthetic resin such as a polyolefin resin, and the inner container 51 is also made of a similar synthetic resin material. The inner container 51 accommodates highly viscous contents such as toothpaste powder and cosmetics. The inner container 51 has an adapter 51a, which is composed of an adapter 51a and a bag body 51b, and which projects in a flange shape. The mouth of the bag body 51b is welded and suspended. A valve seat 53 is formed in the adapter 51a, and a ball 55 lightly pressed by the coil spring 54 is mounted on the valve seat 53.

In such a pressing type container, when the outer container 50 is pressed by hand, the air that has flowed from the check valve body 52 between the outer container 50 and the bag body 51b has already been pressurized. The contents such as the toothpaste powder in the bag 51b, which pushes up, pushes up the ball 55 and discharges it from the spout 56 to the outside. When the pressing of the outer container 50 is released, the outer container 50 is restored to its original shape by the air flowing in from the check valve body 52.

[0004]

[Problems to be solved by the device]

 However, this device has the following drawbacks. Since the outer container 50 and the inner container 51 are molded separately, the inner container 51 must be inserted into the outer container 50 and assembled separately, which is a troublesome manufacturing process. When a highly viscous content such as toothpaste powder is stored in the inner container, the content does not discharge to the end, so that the content remains in the inner container.

The present invention has been made in view of such conventional problems. The outer container and the container are manufactured by simultaneous molding, and the contents do not remain in the inner container. It is an object of the present invention to provide a multi-layer press type container capable of ejecting all of

[0006]

[Means for Solving the Problems]

 The outer and inner layers are made of a polyolefin resin and the middle layer is a gas barrier resin multilayer structure, and at least one adhesive layer interposed between the outer layer and the middle layer and between the middle layer and the inner layer is omitted, and a non-bonded state is obtained. In a multi-layer press type container in which the outer layer forms the outer container and the middle layer and the inner layer form the inner container via the adhesive layer, a sleeve with appropriate rigidity is formed on the inner upper part of the inner container. It is a multi-layer press type container characterized by being mounted, and in the example, a check valve for inflowing air is provided between the outer container and the inner container, and at the mouth of the inner container. A check valve is provided to block the inflow of external air, and the bottom lid provided on the outer container is provided with a cylindrical portion that surrounds the outer periphery above the check valve, and the tip of the cylindrical portion is formed. Pushed up the bottom of the inner bag and touched the bottom And it is characterized in and.

[0007]

[Action]

 The operation of the present invention having the above structure will be described. First, the manufacturing method of the multi-layer press type container according to this idea will be described. At the time of blow molding, a composition of 3 types and 5 layers type (for example, polyethylene / adhesive layer / ethylene-vinyl acetate copolymer from the outside to the inside) is used. (Composed of saponified material / adhesive layer / polyethylene), the second adhesive layer from the outside is omitted and the outer layer can be separated from the intermediate layer (gas barrier layer) and the inner layer. That is, the multilayer pressing container according to the present invention can be manufactured by simultaneously molding the outer container and the inner container with one adhesive layer omitted.

In this way, the multi-layer molded container in which the outer container and the inner container are simultaneously molded is not only easy to separate between the outer container and the inner container, but also the outer container and the inner container are separated from each other. It is possible to inject air from the outside via a check valve. Then, the pressed outer container can be restored and the inner container can be put into a normal pressure state, so by squeezing the outer container by hand, the inner container is crushed via the inflowing air. The contents in the inner container can be discharged to the outside.

When this operation is repeated, the inner bag of the inner container moves upward along the sleeve inserted in the inner upper portion of the inner container so as to be gradually inverted as the contents decrease. At this time, since the bottom of the inner bag is pushed up by the cylindrical portion of the bottom lid, the inner bag moves regularly upward without being twisted. That is, when the pressure on the outer container is released, the inside of the inner bag is in a negative pressure state, so that the inner bag of the inner container is pulled along the sleeve toward the inner wall of the shoulder of the container body (see FIG. 2). ). As a result, the inner bag rises regularly along the sleeve, so that the contents can be pushed up without waste and the rising inner bag can be discharged until it comes into close contact with the inner surface of the shoulder of the inner container. As a result, 95% or more of the content can be discharged.

[0010]

【Example】

 Next, the invention will be described with reference to the drawings. In the figure, 1 is an outer container, and the outer layer 1a of the outer container 1 is made of a polyolefin resin, in the embodiment, polyethylene. Reference numeral 2 is an inner container, and the inner container 2 is composed of an intermediate layer 2a, an adhesive layer 2b and an inner layer 2c. That is, the intermediate layer 2a is made of a saponified ethylene-vinyl acetate copolymer which is a gas barrier resin, the adhesive layer 2b is made of an adhesive modified polyolefin, and the inner layer 2c is made of polyethylene. Therefore, both the outer container 1 and the inner container 2 are made of an elastic and flexible material. That is, when molding from a 3 type 5 layer parison of polyethylene / adhesive layer / ethylene-vinyl acetate copolymer saponified product / adhesive layer / polyethylene, only the second adhesive layer from the outside is omitted and the outer container 1 and The inner container 2 can be made separable. The seamer at the bottom of the inner container 2 is performed after filling the contents 7.

A bottom lid 4 having a check valve 3 for inflowing air from the outside is welded to the bottom of the outer container 1, and the mouth of the inner container 2 is filled with external air. A check valve 5 that blocks the inflow to the inner container 2 is fitted. In the embodiment, the outer container 1 has a wall thickness of 0. The wall thickness of the inner container 2 was 4 to 0.5 mm and 0.05 to 0.1 mm. The feature of this device is that a sleeve 6 having a certain rigidity is mounted in the inner container 2. The sleeve 6 is made of a polyolefin resin such as polyethylene. In the examples, the wall thickness of the sleeve 6 was 0.4 to 0.5 mm. Further, since the cylindrical portion 4a is provided on the bottom lid 4 so as to surround the outer circumference above the check valve, when the bottom lid 4 is welded to the outer container, the bottom portion of the inner bag is pushed up to the inside, and the contents The inner bag can be smoothly flipped along with the discharge, and the inner bag can be easily and regularly raised.

[0012]

[Effect of device]

 As described above, according to this invention, the outer container and the inner container can be manufactured by simultaneous molding, so that the work of assembling the container is not required and the contents can be discharged to the end without being left in the inner container. Produce an effect.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a multi-layer press type container according to the present invention.

FIG. 2 is a cross-sectional view of an embodiment showing a state in which the multi-layer press container according to the present invention is discharging the contents without leaving the contents inside the container.

FIG. 3 is a cross-sectional view showing another embodiment of the multilayer pressing container according to the present invention.

FIG. 4 is an enlarged cross-sectional view of a portion A of FIGS. 1 and 3.

FIG. 5 is a cross-sectional view showing a conventional pressing container.

[Explanation of symbols]

 1 Outer Container 1a Outer Layer 2 Inner Container 2a Intermediate Layer 2b Adhesive Layer 2c Inner Layer 3 Check Valve 4a Cylindrical Section 5 Check Valve 6 Sleeve

Claims (4)

[Scope of utility model registration request] 1. An outer layer and an inner layer have a multilayer structure of a polyolefin resin and an intermediate layer has a gas barrier resin, and at least one of an adhesive layer interposed between the outer layer and the intermediate layer and between the intermediate layer and the inner layer is omitted. In a multilayer pressing container in which the outer layer forms an outer container and the intermediate layer and the inner layer form an inner container with an adhesive layer, the sleeve having appropriate rigidity is formed at the same time in a non-adhesive state. A multi-layer pressing type container equipped with. 2. A check valve for introducing air is provided between the outer container and the inner container.
The multi-layer pressing container described. 3. The multi-layer pressure type container according to claim 1, wherein a check valve for blocking the inflow of external air is provided at the mouth of the inner container. 4. The bottom lid provided in the outer container is formed with a cylindrical portion provided so as to surround the outer periphery above the check valve, and the tip of the cylindrical portion pushes up the bottom portion of the inner bag to the bottom portion. The multilayer pressing container according to claim 1, 2 or 3, wherein they are in contact with each other.