JPH074189Y2 - Composite can of plastic / metal foil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a plastic-metal foil composite can, and more particularly to a metal foil that can be easily recycled.

(Prior Art) For example, there is a composite can of plastic / metal foil proposed in Japanese Patent Publication No. Sho 61-58294, in which a sheet of metal foil is wound and adhered on the outer peripheral surface of the body of a plastic can body.

(Problems to be solved by the invention) This plastic / metal foil composite can has the following features: the weight of the metal can, which is disadvantageous in terms of transportation, the light-shielding property and the shape-retaining property of the plastic container, and It is a solution to both of the problems such as metal cans that cannot be printed beautifully.

However, since the plastic container body itself is softer than a metal material and is more easily deformed by pressure than a rigid metal can, the surface of the metal foil sheet is related to the winding pressure of the metal foil sheet. There is a structural problem that it is difficult to perform mutual mutual position bonding without wrinkles and joint deviations of sheet edge side edges.

As a solution to the problem of joining deviation at the edge of the sheet end, as proposed in JP-A-60-45154, the aluminum foil is integrally formed so that the aluminum foil is located at a predetermined position on the body surface. There is a blow molded polyester resin composite container.

However, as another problem, there is an environmental problem associated with the waste treatment of empty containers.

In this regard, the former is a metal foil bonded, and the latter is a metal foil fused, which makes it difficult or impossible to separate the resin and metal foil, respectively. It has problems and inconvenience on pollution problems. Similarly,
Also in the disposable plastic container proposed in Japanese Patent Laid-Open No. 56-12325, a foamed polyethylene strip is adhered to the body by winding it while pulling it, or as a plastic film to be attached to the body. A heat-shrinkable material is selected and the film is attached to the body portion by utilizing the stretching force or heat shrinking force of the film. Therefore, in order to cover the inferior pulling force, that is, the tightening force at the time of surrounding and tightening the body part, compared with that of metal foil, it must be strengthened by increasing the wall thickness of the container. is there. In addition to making these strips and films detachable by utilizing the expansion and elastic restoring force of the body part of the container body, the container body and the strips and films can be separated to prevent environmental problems. And the idea to contribute to the solution of the pollution problem is invisible.

The present invention has been made in view of such circumstances, and the plastic can main body and the metal foil protective cover can be easily integrated with each other so as to contribute to solving environmental problems and pollution problems. Can be separated and on top of that,
It has the same beautiful printed surface as a metal can, has excellent light-shielding and shape-retaining properties, is lightweight, and has a metal foil reinforced cover with accurate wrinkles on the surface and accurate joining of the edges. It is intended to provide a composite can of plastic / metal foil.

(Means for Solving the Problems) The means taken by the present invention to achieve the above-mentioned object is that the body is pushed by the contents from the inside to be expandable and elastically restored to the outside. The outer peripheral surface of the body is 1 to the vertical line
A plastic can body that has a taper shape with a taper on the lower end side that has an inclination angle of 2 degrees, and an appropriate display is printed on the surface, and a diameter that allows it to be fitted in close contact with the elastically restored body part. And a protective cover made of a tubular metal foil, and a protective cover made of a metal foil is detachably fitted on the outer peripheral surface of the elastically restored state of the body from the lower side of the body. It is a thing.

(Function) A protective cover can be easily fitted over the outer peripheral surface of the body along the taper surface from the lower side of the body in the elastically restored state. In this state, the body is placed inside the can body. It is pushed by the contents to be filled and expands to the outside, and the cylindrical metal foil protective cover spreads from the inside to make pressure contact, while the non-stretchable protective cover restricts the expansion of the body and fastens it. By being in the state, it is kept in a fixed state. And the can body and the protective cover are separated as the contents disappear.
Since the body is elastically restored, it can be separated by forcibly pulling the protective cover under the body.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, A is a composite can, and in the plastic can body 1, the body part a is pushed from the inside by the contents to be expandable outward and elastically recoverable, and the outer peripheral surface of the body part a is a vertical line. On the other hand, the body part a is formed in a taper shape with a taper at the lower end side having an inclination angle of 1 to 2 degrees, and is elastically restored.
A protective cover 2 made of metal foil is detachably fitted on the outer peripheral surface from the lower side of the body.

The metal foil protective cover 2 is formed in a cylindrical shape having a diameter ratio that allows the outer peripheral surface of the body portion a in an elastically restored state to be fitted in a substantially intimate manner, and an appropriate display is printed on the cover surface. There is. Specifically, a sheet of tin-free steel or aluminum with a thickness of 0.2 mm or less, on which an appropriate display 3 is printed,
The edges are welded or adhered to each other to form a tube, or the tube is formed by expansion molding.

In the composite can A illustrated in FIGS. 1 to 3, the can main body 1 is divided and molded into a bottomed container 1a and a lid 1b. The container 1a and the lid 1b are the same as those of the container 1a. A lid 1b separately injection-molded on the opening edge is integrally joined by vibration welding, heat sealing or the like to be united.

Then, recesses 7 and 8 are provided on the bottom surface portion of the container 1a at positions facing the projecting inlet 5 and the handle 6 in the lid 1b, respectively, and are shaped so that the inlet 5 and the handle 6 can be loosely fitted therein. Therefore, even if the composite cans A are stacked vertically, a stable posture can be maintained. The stability of this stacked state is
The bottom portion of the container 1a is used as a leg portion 9 having a small diameter.
Can be further measured by fitting it into the concave upper surface portion 10 of the lid 1b.

In the composite can A illustrated in FIG. 4, the can main body 1 is integrally formed by blow molding, and the protective cover 2 fitted on the outer peripheral surface of the taper-shaped body a having a downward taper of about 1 to 2 ° is vertically arranged. It is sandwiched by the step 11 and integrated.

(Effects of the Invention) Therefore, the present invention has the following advantages.

A protective cover can be easily fitted over the outer peripheral surface of the body along the tapered surface from the lower side of the body in the elastically restored state, and the body is filled with the protective cover in this state. It is pushed by the contents and expands to the outside, and the cylindrical metal foil protective cover spreads from the inside to make pressure contact, while the non-stretchable protective cover restricts the expansion of the body part and becomes a state of fastening. As a result, it can be kept in a fixed state. The can body and the protective cover can be easily separated by forcibly pulling the protective cover to the lower side of the body part because the body part elastically restores as the contents disappear. . As a result, the collection process can be selected and recycled, which can contribute to solving environmental problems and pollution problems.

The metal foil reinforced decorative cover on the peripheral side surface of the body has no wrinkles and no displacement at the joint edge side, and has an easy-to-manufacture structure and has a high commercial value.

It has the same beautiful printed surface as metal cans and is highly valued as a product. It also has superior light-shielding and shape retention properties compared to plastics, and stacking pressure during distribution and storage after filling contents. With a metal can, it is lightweight, and its wall thickness can be reduced by about 30% compared to general plastic containers, which is advantageous for packaging and transportation.

[Brief description of drawings]

FIG. 1 is a front view showing an example of the composite can of the present invention, FIG. 2 is a plan view, FIG. 3 is a longitudinal front view, and FIG. 4 is a front view showing another embodiment, which are partially cut away. In the figure, (A) is a composite can (a) is a body (1) is a can body (2) is a metal foil protective cover (3) is a display

Claims (1)

[Scope of utility model registration request] 1. A lower end side in which a body portion is pushed by an inside of a container to be expandable outward and elastically recoverable, and an outer peripheral surface of the body portion has an inclination angle of 1 to 2 degrees with respect to a vertical line. Protective cover made of cylindrical metal foil with a diameter ratio that allows a plastic can body that is a tapered taper shape and an appropriate indication to be printed on the surface so that it can be fitted almost elastically to the elastically restored body part A composite can of plastic / metal foil in which a protective cover made of metal foil is detachably fitted from the lower side of the body to the outer peripheral surface of the body that is elastically restored.