JP2579322Y2 - Laminated bottle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated bottle in which an inner layer is releasably provided on an outer layer to prevent a change in the external shape of the bottle.

[0002]

2. Description of the Related Art A laminated bottle of this type has at least an outer layer and an inner layer, and the outer layer and the inner layer are entirely adhered to each other over an entire circumference with an adhesive layer to integrate them.
There is known a structure in which they are not separated from each other.

[0003]

[Problems to be Solved by the Invention] By the way, if a long time elapses after filling a bottle with contents, even if the bottle is sealed, oxygen in the contents is volatilized and the inside of the bottle is decompressed. There are cases. Also, when the pump is attached to the mouth of the bottle, the inside of the bottle is depressurized with the discharge of the content liquid by the pump.

In such a case, in a conventional laminated bottle,
The outer layer, that is, the bottle body shrinks together with the inner layer, and the external shape of the bottle changes, resulting in a problem that the product value is impaired.

[0005] Further, the shape change occurs in an irregular shape, and even if the mouth portion is positioned downward, the content of the deformed bottle tends to remain on the uneven portion of the inner layer caused by the deformation. It is difficult to take out contents efficiently and efficiently.

An object of the present invention is to prevent a change in the external shape of a bottle due to reduced pressure in the bottle.

[0007]

Means for Solving the Problems The present invention has been made as follows to solve the above problems. That is, a laminate having at least two layers of an outer layer 2 made of a synthetic resin and an inner layer 1 made of a flexible synthetic resin, having a bottle mouth 4 at the top of the body and a bottom at the bottom of the body. In the bottle,
The inner layer 1 of the body of the bottle and the outer layer 2 adjacent thereto
And at least a part of the inner layer 1 and the outer layer 2 are adhered by an adhesive band 3, and at least one of the adhesive bands 3 is an adhesive band 3 extending in a direction from the bottle mouth 4 to the bottom. The inner layer 1 is adhered to the outer layer 2 at a bottom parting line formed at the time of molding.
A slit 12 for allowing air to flow between the outer layer 2 and the inner layer 1 is provided between them, a base cup 30 is mounted on the bottom of the bottle, and the slit 12 is provided between the base cup 30 and the bottom of the bottle. Is provided with a void portion 43 opening,
An air passage 44 opened to the outside of the outer peripheral wall 39 of the base cup 30 is communicated with the cavity 43 to form a laminated bottle.

[0008]

[Function] In the laminated bottle of the present invention, when a long time elapses after filling the contents, the volume of the contents decreases in a sealed state, and the pressure inside the bottle is reduced, or a pump is attached to the mouth and the contents liquid is poured. When it comes out, air is sucked in from the outside between the inner layer 1 and the outer layer 2, and as shown in FIG. Is shrunk and deformed, so that no change is observed in the external shape of the bottle.

That is, when the pressure in the bottle is reduced, the air outside the bottle flows into the gap 43 provided between the bottom of the bottle and the base cup 30 through the air passage 44. Air flows between the inner layer 1 and the outer layer 2 of the bottle through the slits 12 provided in the outer layer 2, and only the inner layer 1 contracts and deforms.

The air inlet slit 12 provided in the outer layer 2 can be formed at the same time as the bottle is formed, and is provided at the bottom parting line of the bottle, which is difficult for human eyes to notice. Is the base cup 30
The base cup 30 provides a passage through which air can flow even when the bottle is placed on a flat surface as described above.

Therefore, a passage through which air can flow is provided between the inner layer 1 and the outer layer 2 of the bottle without making the bottom of the bottle complicated. Further, when the inner layer 1 is deformed, the deformed shape can be specified by previously bonding the inner layer 1 and the outer layer 2 at a specific portion, and even when the inner layer 1 is deformed, Efficient removal of the contents can be realized.

In the case where at least a part of the inner layer 1 and the outer layer 2 are adhered by an adhesive band 3, at least one adhesive band 3 is provided on the body along the direction from the bottle mouth to the bottom. In this case, the shrinkage of the bag formed by the inner layer 1 is regulated by the adhesive portion, the deformed shape can be specified, and efficient removal of the contents can be realized.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 6 are views for explaining one embodiment of the present invention. In this embodiment, as shown in FIG. 5, a bottle mouth 4 is provided at an upper part of an elliptical body, and an elliptical bottom is provided at a lower part of the body. It is a laminated bottle provided with an inner layer 1 made of a flexible synthetic resin.

The outer layer 2 of the bottle is made of high density polyethylene and the inner layer 1 is made of nylon. The bottle is
As shown in FIGS. 7 and 8, the inner layer 1 may be constituted by a nylon layer 1b having a thickness of 50 μm and an admer (trade name) layer 1a having a thickness of 50 μm laminated on the inside thereof.

A pump for discharging the content liquid is attached to the mouth of the bottle (FIG. 1), and a suction pipe (not shown) for the content liquid is provided downward from the pump toward the inside of the bottle. It is.

In the bottle, an inner layer 1 or an inner layer 1 composed of an admer layer 1a and a nylon layer 1b and an outer layer 2 adjacent to the inner layer 1 are releasably laminated. And
As shown in FIGS. 5 to 7, the inner layer 1 and the outer layer 2 are connected from the mouth 4 to the bottom by an adhesive band 3 made of Admer (trade name) along the direction from the mouth 4 to the bottom. Through
Although a portion covering substantially half of the bottom is linearly adhered, the bottom of the inner layer 1 and the outer layer 2 may adhere along the entire length in the major axis direction along a bottom parting line formed at the time of bottle molding. Good.

The lower ends of the inner layer 1 of the bottle are adhered to each other at the parting line at the bottom, and the inner layer 1 is formed into a flexible bag. The lower ends of the outer layer 2 of the bottle are also bonded by a parting line at the bottom of the outer layer 2, which is a portion bonded by the parting line and near the outside of the bottom, FIG. As shown in FIGS. 4 and 8, a slit 12 is provided between the outer layer 2 and the inner layer 1 to allow air to flow.

The slits 12 are formed on the ribs 11 by projecting a part of the portion bonded by the parting line downward, and the inner layers 1 are also bonded on the ribs 11 to form the outer layer. Reference numeral 2 denotes a slit which is formed between the rib 11 and the bonded portion of the inner layer 1 without adhering the rib 11 to each other.

As shown in FIG. 1, a base cup 30 made of synthetic resin is fitted on the bottom of the bottle. 1 and 5 on the outer periphery of the lower part of the body of the bottle.
As shown in FIG. 3, an annular step portion 21 is provided, and a step portion 32 shown in FIGS. 1 and 3 is provided on the upper inner periphery of the outer peripheral wall 39 of the base cup 30. Step 3
2 and the base cup 30 is mounted on the bottom of the bottle.

The base cup 30 has an annular bottom surface 38 protruding downward from an outer peripheral portion of the lower surface to form an annular bottom surface 38. A gap 43 is provided between the bottom surface 38 and the bottom of the bottle.

A rib 11 protruding downward from the bottom of the bottle protrudes into the cavity 43, and the slit 12 is opened in the cavity 43.
Numeral 2 is formed so as to communicate between the inner layer 1 and the outer layer 2.

Further, the air passage 4 is provided in the space 43.
4 communicates with each other, and this air passage 44 is provided inside the outer peripheral wall 39 of the base cup 30 in a vertical direction, and serves as an air passage 44 that opens at the upper end of the outer peripheral wall 39 to the outside of the outer peripheral wall 39. It communicates with the outside of the bottle.

The bottom surface 38 of the base cup 30
Is provided with a bottom through-hole 47, and the base cup 30
An inner wall through hole 48 is provided at the upper end of the inner wall 40. The production of the bottle of this embodiment is performed as follows.

First, as an example, a laminated parison having a cross section as shown in FIG. 7 is formed by extrusion molding. Adhesive strip 3
Is provided over the entire length of the laminated parison. And
The laminated parison is sandwiched between a pair of molds for blow molding, and the bottle shown in FIG. 5 is molded by a blow molding method.

At this time, the bottom of the bottle is cut off by a mold. The cut-off portion (pinch-off portion) is on the parting line of the mold, and the cut-out portion forms a rib 11 projecting slightly outward. FIGS. 1, 4 and 8 show the ribs 11 formed by cutting. In the ribs 11, the inner layers 1 completely adhere to each other at the time of cutting, but the outer layers 2 do not adhere to each other. Later on the bottom 5 with a stick
When an impact is given by striking the inner layer 1, a crack 12 is formed between the outer layer 2 and the inner layer 1 on the parting line. As a result, air flows between the inner layer 1 and the outer layer 2 from the slit 12.

This bottle is suitable for a case where a pump is attached to the mouth and used as a bottle for taking out a liquid content by the pump. For example, it is suitable for use as a large container for shampoo or rinse used in a bathroom.

In such a container, when the inside of the container is operated under a negative pressure by operating the pump, the inner layer is peeled off from the outer layer and collapsed. At this time, it is possible to prevent air from entering between the inner layer 1 and the outer layer 2 from the bottom slit and crushing the bottle composed of the outer layer 2. In addition, since the large container for shampoo or rinsing is usually used by being placed on the floor of a bathroom, if the slit is located at a position where the hot water can be touched, the hot water may enter the outer layer from the slit. However, in the present embodiment, since the base cup 30 is mounted and the gap 43 is provided, and the slit 12 is opened in the gap 43, there is no possibility that hot and cold water will be sucked from the slit 12.

FIG. 9 shows another embodiment of the present invention, and the same parts as those in the above embodiment are denoted by the same reference numerals and description thereof is omitted. In this embodiment, the central portion of the base cup 30 was adhered to the lower surface of the central portion of the bottom portion of the bottle with an adhesive 34 of a melt or double-sided tape, and the base cup 30 was attached to the bottom portion of the bottle.

FIGS. 10 and 11 show another embodiment of the present invention. In this embodiment, the body of the bottle is formed in a cylindrical shape, and the male screw 22 is provided at the lower part of the body of the bottle. The female screw 33 provided on the outer peripheral wall 39 of the base cup 30 was screwed into the provided male screw 22, and the base cup 30 was attached to the bottom of the bottle.

[0030]

According to the present invention, in the laminated bottle,
Even if the inside of the bottle is decompressed, only the inner layer is crushed and shrunk, so that there is no change in the appearance of the bottle and the product is not impaired. In addition, since the bag consisting of the inner layer is crushed neatly, there is no adverse effect on the discharge of contents by a pump, etc.
It can be discharged well without leaving the remaining amount.

Also, a base cup is mounted on the bottom of the bottle, and this base cup forms a passage through which air can be sucked in without sucking hot water even when the bottle is placed on a flat surface. As a result, the bottom of the bottle does not require a complicated structure for inhaling only air.

[Brief description of the drawings]

FIG. 1 is a front view of a bottle according to an embodiment of the present invention, with a part of the bottle cut away.

FIG. 2 is a bottom view of the base cup according to the embodiment of the present invention;

FIG. 3 is a sectional view of a part of an outer peripheral wall of the base cup according to the embodiment of the present invention;

FIG. 4 is a partial cross-sectional view taken along line AA of FIG. 1;

FIG. 5 is a partial cutaway view of the bottle of the embodiment of the present invention.

FIG. 6 is a sectional view showing a state in which the bag is crushed by the inner layer of the bottle according to one embodiment of the present invention

FIG. 7 is a cross-sectional view of a parison for bottle molding of an embodiment having two inner layers.

FIG. 8 is a cross-sectional view of a slit portion of an embodiment having two inner layers.

FIG. 9 is a partially cutaway front view of a bottle according to another embodiment of the present invention.

FIG. 10 is a partially cutaway front view of a bottle according to another embodiment of the present invention.

FIG. 11 is a bottom view of the base cup according to another embodiment of the present invention;

[Explanation of symbols]

 Reference Signs List 1 inner layer 2 outer layer 3 adhesive band 4 mouth 12 slit 30 base cup 39 outer peripheral wall 43 gap 44 air passage

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65D 1/00-1/48 B32B 1/02 B32B 7/06 B32B 27/00

Claims (1)

(57) [Scope of request for utility model registration] 1. A bottle having an opening 4 at the upper part of the body and a bottom at the lower part of the body, at least two layers of an outer layer 2 made of synthetic resin and an inner layer 1 made of flexible synthetic resin. A laminated bottle consisting of:
And the outer layer 2 adjacent thereto are peelable, and at least a part of the inner layer 1 and the outer layer 2 are adhered with an adhesive band 3, and at least one of the adhesive bands 3 The bottle is formed in an adhesive band 3 along the direction toward the inner layer 1 and the inner layer 1 is bonded to each other at a bottom parting line formed at the time of molding, and between the outer layer 2 and the inner layer 1 The base cup 30 is attached to the bottom of the bottle, and a gap 43 where the slit 12 opens is provided between the base cup 30 and the bottom of the bottle. A laminated bottle in which an air passage 44 that opens outside the outer peripheral wall 39 of the base cup 30 is communicated.