JPH0542008Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a plastic bottle container used as a packaging container for shampoo, liquid detergent, cosmetics, and other liquid contents.

[Prior Art] Synthetic resin bottle containers are used as packaging containers for shampoos, liquid detergents, cosmetics, and other liquid contents.

In order to improve the appearance of these containers, they were molded with colored resin, and after molding, the surface of the container was printed or a label was attached. It requires a process and has the problem of peeling off due to being immersed in water or being rubbed during use.

In order to solve this problem, the present applicant previously proposed a bottle container having a striated mesh pattern on its outer surface, as shown in Utility Model Application Publication No. 9570 of 1970.

This is because a synthetic resin filament network structure consisting of one filament diagonal to the axial direction of the parison and the other filament diagonal or parallel to the parison axis are intersected on the outer surface. It is a synthetic resin blow-molded container with a mesh pattern on the outer surface, which is made by blow-molding parisons that are welded together and extruded, and has the advantage of an interesting appearance and no additional steps.

[Problem to be solved by the invention] However, since the filament network structure is embedded in the wall thickness of the container and is fused and molded, the pattern will not peel off, but the oxygen permeability in this area will increase, and oxygen There is a problem that the barrier properties against

This idea was made in view of the above circumstances, and it has an interesting appearance with a mesh pattern.
It is an object of the present invention to provide a multilayer mesh bottle that does not require an increase in production processes, can ensure barrier properties against oxygen, and can be constructed so that the liquid level of the contents can be seen through.

[Means for Solving the Problem] Corresponding to this purpose, the multilayer mesh bottle of this invention is made by blowing a multilayer molten resin tube body in which an inner layer, an intermediate layer, and an outer layer are laminated in the radial direction. The intermediate layer has a lower oxygen permeability than the inner layer and the outer layer, and at least one of the inner layer and the outer layer has a linear network structure integrally formed on the surface. The wire network structure has a first wire oblique to the axial direction of the multilayer molten resin tubular body and a second wire oblique or parallel to the axial direction intersect with each other. and each of the filaments is made of the same material as the fused layer, and has different color properties;
Further, at least one of the inner layer and the outer layer has a band-shaped portion having a higher light transmittance than the layer fused in the axial direction.

[Function] In the multi-layer mesh bottle configured in this way, the intermediate layer can be formed to have a uniform thickness over the entire circumference, and the molecules are oriented in a specific direction in a specific part of the circumference to absorb oxygen. There is no risk of forming an easy-to-pass passage. Therefore, if this intermediate layer is made of a resin with high barrier properties against oxygen, such as EVAL, the barrier properties against oxygen will not be reduced.

In addition, when the filament mesh structure has different color performance from the circumferential half part, especially from the whole part, the mesh pattern stands out and produces an interesting effect.

Furthermore, at least a circumferential portion of at least one of the inner layer and the outer layer can be formed into a band shape by using a resin having a higher light transmittance than the majority portion. In this case, the level of the liquid content can be seen through this band-shaped part.

In either case, adding a pattern does not increase the number of steps.

[Example] Hereinafter, details of this invention will be explained with reference to drawings showing an example.

In FIG. 1, 1 is a multilayer mesh bottle.
The multilayer mesh bottle 1 is a multilayer molten resin tubular structure in which an inner layer 2, an intermediate layer 3, and an outer layer 4 are laminated in the radial direction with adhesive layers 6, 6 in between, as shown in FIG. The body 5 is blow molded.

The outer layer 4 has a filamentary network structure 7 integrally fused onto its surface.

The filamentary mesh structure 7 is formed by intersecting first filaments 7a obliquely with respect to the axial direction 8 (perpendicular to the paper surface of FIG. 2) of the multilayer molten resin tubular body 5 and second axial filaments 7b obliquely with respect to the axial direction 8.

An example of a method and apparatus for obtaining a tubular molten resin layer in which a filamentary network structure is integrally embedded and fused to the surface is described in the above-mentioned Utility Model Application Publication No. 1971.
No. 9570 in detail, and an example of an apparatus for obtaining a multilayer molten resin tubular body by extruding three tubular molten resins in a laminated state with a welding agent layer sandwiched between them will be described later.

The first filament 7a and the second filament 7b are made of the same material (for example, polyethylene or polypropylene) as the outer layer 4 to which they are fused and differ only in color properties. For example, the outer layer 4 is a colored material and the filaments 7a and 7b are natural materials, or the outer layer 4
are natural materials and the filaments 7a and 7b are colored with the same color, or the outer layer 4 is colored with a first color and the filaments 7a and 7b are colored with a second color and a third color, respectively. , etc.

At this time, natural materials or coloring materials can be used as the inner layer in any case.

For the intermediate layer, a material with low oxygen permeability, such as EVAL, can be used.

In the multilayer molten resin tubular body 5 described above, the linear network structure is fused to the outer surface of the outer layer 4, but it may also be fused to the inner surface of the outer layer 4. Instead of 4, the linear network structure may be fused to the outer surface of the inner layer 2. Alternatively, it may be fused to the surfaces of both the inner layer and the outer layer.

In either case, the mesh structure portion has different color properties from the remaining portion, so the mesh pattern stands out.

In the multilayer mesh bottle 1 described above, the layer in which the filaments 7a and 7b are fused has different color properties from the filaments 7a and 7b over its entire circumference, and a mesh pattern stands out over the entire circumference of the container. However, the third
Like the multi-layer mesh bottle 1a shown in the figure, a band-shaped part 11 for transparent viewing is provided in a part of the circumferential direction of the container so that the mesh pattern does not stand out in this part and does not interfere with the transparent viewing of the content liquid level. It can also be configured as

That is, the multilayer mesh bottle 1a is made by blow molding a multilayer resin tubular body 5a shown in FIG. It forms a band-shaped part 11 for transparent viewing.

That is, in the band-shaped part 11 for see-through, the inner layer 2
a and the outer layer 4a are made of a resin having a higher light transmittance than the parts 2c and 4c in the majority part 12, forming band-shaped parts 2b and 4b.

The technique for forming such a band-shaped part 11 for transparent viewing is disclosed in a patent application filed by the applicant on December 16, 1988 entitled "Multilayer Hollow Container with Lines for Viewing and Die Head for Multilayer Coextrusion," This also applies to the above 3
Also shown is an apparatus for obtaining a multilayer molten resin tubular body by extruding two tubular molten resin layers stacked with an adhesive layer sandwiched between them.

If the striated mesh structure stands out even in the band-shaped part 11 for fluoroscopy, it will impede the fluoroscopy function, so the band-shaped part 2b,
4b is made of a resin having almost the same color properties as the parts 7c and 7d of the striated network structure covering these parts.

Examples of such resin configurations include portions 2c,
4c can be made of a coloring material, and the band parts 2b, 4b and the linear parts 7a, 7b can be made of a natural material.

In the multilayer mesh bottle 1a described above, the inner layer 2a and the outer layer 4a of the multilayer molten resin tubular body 5a
and belt-like parts 2b and 4 for transparent viewing.
Although b is provided, it is clear that it can be provided only on either the inner layer or the outer layer, and regardless of the striated network structure.

The multilayer mesh bottle 1b shown in FIG. 5 is an embodiment in which the second filament 7e is provided parallel to the axis 8.

By changing the direction, pitch, and thickness of the mesh in this way, different visual effects can be produced.

[Effects of the invention] As is clear from the above explanation, this invention has a mesh pattern that gives it an interesting appearance, does not require an increase in the number of production processes, and can ensure barrier properties against oxygen, making it possible to reduce the content of the contents. It is possible to obtain a multilayer mesh bottle that can be configured so that the liquid level can be seen through.

[Brief explanation of the drawing]

Fig. 1 is a front view of a multi-layer mesh bottle according to one embodiment of the present invention, Fig. 2 is a cross-sectional view of a multi-layer molten resin tubular body for the multi-layer mesh bottle shown in Fig. 1, Fig. 3 is a side view of a multi-layer mesh bottle according to another embodiment of the present invention, Fig. 4 is a cross-sectional view of a multi-layer molten resin tubular body for the multi-layer mesh bottle shown in Fig. 3, and Fig. 5 is a front view of a multi-layer mesh bottle according to yet another embodiment of the present invention. 1, 1a, 1b...multi-layer mesh bottle, 2...
Inner layer, 3...middle layer, 4...outer layer, 5,
5a: multi-layer molten resin tubular body; 6: adhesive layer;
7: Linear mesh structure, 7a: First filament, 7
b...second line, 8...axis, 11...visual strip, 12...major portion.

Claims (1)

[Scope of utility model registration request] It is made by blow molding a multilayer molten resin tubular body in which an inner layer, an intermediate layer, and an outer layer are laminated in the radial direction.
The intermediate layer has a lower oxygen permeability than the inner layer and the outer layer, and at least one of the inner layer and the outer layer has a striated network structure integrally fused to the surface thereof. , the filament network structure is formed by intersecting first filaments oblique to the axial direction of the multilayer molten resin tubular body and second filaments diagonal or parallel to the axial direction, The two filaments are made of the same material as the fused layer and have different color properties, and at least one of the inner layer and the outer layer has a A multilayer mesh bottle characterized by having a band-shaped portion having a higher light transmittance than the layer fused in the axial direction.