JP3099726U - Plastic container - Google Patents

Abstract

An object of the present invention is to reduce manufacturing costs without lowering the quality of a plastic container. The amount of contents can be checked from the outside of the container to improve convenience.
A plastic container 1 having a two-layer structure in which the outer layer portion 10 is formed of plastic to be discarded and virgin plastic and the inner layer portion 20 is formed of transparent virgin plastic while keeping the thickness of the conventional plastic container substantially the same. The plastic material of the outer layer part 10 and the inner layer part 20 is the same. Since the plastic to be discarded is used for the outer layer portion 10, the cost can be reduced. Since the inner layer portion 20 is a virgin plastic, it has excellent durability and does not contaminate the contents. The outer layer portion 10 and the inner layer portion 20 are integrated by blow molding, and are of the same material, so that they have good bonding properties. A part of the transparent inner layer portion 20 is exposed to the outer layer portion 10 to form a window 20a for viewing the contents, so that the amount of the contents can be confirmed from the outside of the container 1.
[Selection] Fig. 2

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a plastic container, in particular, using a virgin plastic material for the inner layer body (does not use a plastic for disposal) and using a plastic container for the outer layer body, thereby lowering the quality of the entire container. The present invention relates to a plastic container whose production cost is reduced without causing the production cost.
[0002]
In this specification, plastic in an arbitrary state that can be disposed of is referred to as “plastic to be disposed of”.
[0003]
For example, plastics to be discarded include
・ Unnecessary parts such as burrs and residues generated in the manufacturing process of various plastic products ・ Used various plastic products ・ Molding materials whose quality is below standard and not suitable for commercialization (various additives and modifiers were added And the like).
[0004]
Also, at least a molding material (pellet) obtained by adding various additives and modifiers to a resin (synthetic resin), a product obtained by processing the same, and the like are referred to as “plastics”.
[0005]
Further, the opening side of the plastic container is referred to as “upper”, and the bottom side is referred to as “lower”.
[0006]
[Prior art]
2. Description of the Related Art Conventionally, plastic containers, metal containers, and the like have been used as containers for storing engine oil and chemically synthesized solutions for automobiles and motorcycles.
[0007]
As shown in FIG. 4, a general plastic container 2 has a single-layer structure manufactured by plastic blow molding.
[0008]
Here, if the plastic container 2 is molded using only virgin plastic, the quality is good but the cost is high.
[0009]
On the other hand, if the plastic container 2 is molded using only the plastic to be discarded, the cost is low, but the heat treatment at the time of reworking may cause the density to be insufficient, causing a porous or cracking and causing leakage of the contents. May be contaminated.
[0010]
In addition, as a plastic container having a multilayer structure using a plastic to be discarded, there is a plastic container having an outer layer portion having a surface gloss, an inner layer portion having excellent drop impact strength, and a plastic layer to be discarded as an intermediate layer portion thereof. (For example, see Patent Document 1).
[0011]
[Patent Document 1]
JP-A-2003-94539
[0012]
[Problems to be solved by the invention]
As described above, when a plastic container is molded using only virgin plastic, the product cost is increased, and when molding is performed using only the plastic to be disposed, there is a problem in that the quality is reduced.
[0013]
Therefore, in the present invention, the inner layer of a virgin plastic container (not including the plastic to be discarded) and the outer layer of a container of a plastic to be discarded are excellent in durability at a low cost and also contaminate the contents. An object of the present invention is to provide a plastic container that does not need to be used.
[0014]
Another object of the present invention is to actively use resources by actively recycling plastics to be disposed of, thereby conserving the environment.
[0015]
Another object of the present invention is to provide a transparent plastic-like inner layer body and provide a window for confirming the content amount in a form in which a part of the inner layer body is exposed to the outer layer body, so that the content amount can be confirmed from outside the container. . Note that “transparent” means that at least the contents stored in the container can be checked from the outside.
[0016]
[Means for Solving the Problems]
The present invention solves this problem as follows.
(1) A plastic container (for example, a plastic described later) including an inner layer body (for example, an inner layer portion 20 described later) that forms a content storage space and an outer layer body (for example, an outer layer portion 10 described later) integrated with the inner layer body. In the container 1), the inner layer body is formed by molding virgin plastic without containing the plastic to be discarded, and the outer layer body is formed by molding at least the plastic to be discarded.
(2) In the above (1), a transparent material is used as the inner layer body, and a part of the inner layer body is exposed to the outer space side as a window (for example, a window 20a described later) for confirming the content.
(3) In the above (2), the window is provided in a vertical direction.
(4) In the above (1) to (3), the resin (synthetic resin) forming each of the inner layer body and the outer layer body is of the same type (for example, HDPE).
[0017]
In the present invention, as described above, the inner layer body forming the content storage space is formed of virgin plastic to exclude the plastic to be discarded, and the outer layer body on the outer space side is formed of at least plastic to be discarded. Thus, the manufacturing cost is reduced without lowering the quality.
[0018]
In addition, the recycling of plastics to be discarded is being actively promoted to make effective use of resources.
[0019]
In addition, a transparent window for confirming the content amount is provided so that the content amount can be confirmed from outside the container, thereby improving the convenience of the container user.
[0020]
Further, the resin of the inner layer body and the resin of the outer layer body are of the same type, thereby improving the bondability between the two.
[0021]
[Embodiment of the invention]
An embodiment of the present invention will be described with reference to FIGS.
1 is an external view of a two-layer plastic container, FIG. 2 is a vertical sectional view of the container of FIG. 1, and FIG. 3 is a horizontal sectional view of the container of FIG.
[0022]
In these figures,
Reference numeral 1 denotes a two-layer plastic container, 1a denotes an opening, 1b denotes a concave portion formed so that fingers can be easily held when holding the container by hand, and 1c denotes a convex portion formed in the concave portion. Slip stop, 1d is contents storage space,
10 is an outer layer portion made of a mixture of a plastic to be discarded and virgin plastic, 10a is a portion formed in the outer layer portion, a vertical hole corresponding to a window 20a for confirming the content,
Reference numeral 20 denotes an inner layer portion made of only transparent virgin plastic, and reference numeral 20a denotes a vertical window for confirming a content amount formed in the vertical hole 10a of the outer layer portion 10, which is a part of the inner layer portion.
[0023]
The plastic container 1 has a two-layer structure whose thickness is substantially the same as that of a conventional single-layer plastic container. The outer layer portion 10 on the outer space side is made of plastic to be discarded and virgin plastic, and the inner layer portion 20 on the side of the contents storage space 1d is made of only virgin plastic (= not including the plastic to be discarded). . In addition, it is needless to say that the outer layer portion 10 may be composed of only the plastic to be discarded.
[0024]
Here, the resin (resin) constituting the outer layer portion 10 and the inner layer portion 20 of the plastic container 1 is HDPE, PET, PP, LDPE, PS, PVC, or the like. In order to improve the bonding state between the outer layer portion 10 and the inner layer portion 20, it is preferable that both layers use a resin of the same type (material).
[0025]
The plastic to be discarded and the virgin plastic in the outer layer portion 10 are also preferably made of the same type of resin.
[0026]
The ratio of the thickness of each of the outer layer portion 10 and the inner layer portion 20 is desirably 1: 3 to 3: 1.
[0027]
As an example of the material and size ratio of the components of the plastic container 1,
-The plastic to be discarded and the virgin plastic are HDPE containing a plasticizer, a filler, a stabilizer and the like (in the following description, they will be referred to as "HDPE to be discarded" and "virgin HDPE", respectively, as necessary).
The inner layer portion 20 is a transparent virgin HDPE,
An outer layer portion 10 and an inner layer portion 20 have a thickness ratio of 1: 1;
That is.
[0028]
As shown in FIGS. 1 to 3, in the plastic container 1 having a two-layer structure, a part of the transparent inner layer portion 20 enters the vertical hole 10 a of the outer layer portion 10, and a window 20 a for confirming the content is formed in the outer layer portion 10. It is integrated in the form of becoming almost the same plane.
[0029]
The outer layer portion 10 is colored with a pigment. By making the outer layer of plastic to be discarded, effective use of plastic resources is achieved, and production costs are reduced by reducing the amount of virgin plastic used.
[0030]
On the other hand, since the inner layer portion 20 is made of transparent virgin HDPE and does not include the plastic to be discarded, there is no occurrence of a porous portion or crack, and the contents directly touching the inner layer portion are not deteriorated.
[0031]
Then, the content amount can be easily confirmed from the outside of the plastic container 1 by the content confirmation window 20a.
[0032]
Since the resin constituting the outer layer portion 10 and the inner layer portion 20 are made of the same material, they are securely joined by blow molding, whereby the outer layer portion 10 is reinforced by the inner layer portion 20. Pores, cracks, and the like that occur in the container formed by molding are suppressed.
[0033]
When manufacturing the two-layer structure of the outer layer portion 10 and the inner layer portion 20, a blow molding technique or the like is used.
[0034]
In the case of blow molding,
(1) The extruder extrudes a resin composed of a mixture (outer layer) of HDPE and virgin HDPE to be discarded and a transparent virgin HDPE (inner layer) to form a so-called two-layer parison (having vertical holes 10a). make,
(2) After sandwiching the parison in a mold corresponding to a container, the parison is formed by blowing compressed air into the parison.
Will be.
[0035]
The outer layer portion 10 can be colored by adding various pigments. However, if the HDPE pellets to be discarded used in the outer layer portion 10 already have a desired color, the pigment need not be newly added.
[0036]
The outer layer portion 10 may be composed of only the plastic to be discarded, and the outer layer portion 10 and the inner layer portion 20 may have a new desired property (a property that cannot be obtained from the plastic to be discarded). Various additives and modifiers may be further mixed with the virgin plastic.
[0037]
[Effect of the invention]
In the present invention, as described above, the inner layer body forming the content storage space is formed of virgin plastic so as not to include the plastic to be discarded, and the outer layer body on the outer space side is formed of at least plastic to be discarded. Therefore, it is possible to provide a plastic container which is inexpensive, has excellent durability and does not pollute the contents.
[0038]
In addition, since the plastic to be disposed of is actively reused, it is possible to contribute to environmental protection by effectively utilizing resources.
[0039]
In addition, since a transparent window portion for confirming the contents is provided so that the contents can be confirmed from outside the container, the convenience of the container user can be improved.
[0040]
Further, since the resin of the inner layer body and the resin of the outer layer body are of the same type, it is possible to improve the bonding property between them.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an external shape of a plastic container having a two-layer structure according to the present invention.
FIG. 2 is a vertical sectional view of the two-layer plastic container of the present invention.
FIG. 3 is a cross-sectional view in the left-right direction of the two-layer plastic container of the present invention.
FIG. 4 is a vertical sectional view of a conventional single-layer plastic container.
[Explanation of symbols]
1: plastic container 1a having a two-layer structure: opening 1b: concave portion 1c: anti-slip 1d: content storage space 10: outer layer portion 10a: vertical hole 20: inner layer portion 20a: window for confirming content amount 2: single Layered plastic container

Claims (6)

In an inner layer body that forms a content storage space, and a plastic container that is formed integrally with the outer layer body on the outer space side,
The inner layer body is formed of virgin plastic without including the plastic to be disposed of,
The outer layer is formed by molding at least a plastic to be disposed of,
A plastic container characterized by the above-mentioned. Using a transparent thing as the inner layer body, a part of which is exposed to the external space side in the form of a window for content confirmation,
The plastic container according to claim 1, wherein: The window was formed in the vertical direction of the container,
3. The plastic container according to claim 2, wherein: Resins forming the inner layer body and the outer layer body are both of the same type,
The plastic container according to claim 1, wherein: Resins forming the inner layer body and the outer layer body are both of the same type,
3. The plastic container according to claim 2, wherein: Resins forming the inner layer body and the outer layer body are both of the same type,
4. The plastic container according to claim 3, wherein:

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