JP3796586B2 - UV blocking tube container - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an ultraviolet ray blocking tube container for storing a so-called UV cut (ultraviolet ray blocking) product such as a sunscreen cream.
[0002]
[Prior art]
In order to prevent the adverse effects of ultraviolet rays on the human skin, UV-cut products such as creams for sunscreen and cosmetics having sunscreen effects are widely used.
[0003]
Since the UV-cut product reacts with ultraviolet rays, the quality is deteriorated by reacting with the ultraviolet rays before use. Therefore, conventionally, in a tube container for storing a UV-cut product, for example, as shown in FIG. 8, a body portion 4, an aluminum foil having a high UV blocking effect, and a synthetic resin coating layer 6 on both sides of the cut layer 5. A protective layer 7 made of synthetic resin is laminated on the outer side of the aluminum laminate film coated with the film, and the head 1 connected to the body 4 is made of an aluminum foil or aluminum thin plate blocking layer that blocks ultraviolet rays. The inner layer and the outer layer 3 made of a synthetic resin are laminated on both the inner and outer sides of 2.
[0004]
[Problems to be solved by the invention]
However, in the above-described conventional technique, an extremely high technique is required for injection molding or press molding using an aluminum foil or an aluminum thin plate of the head 1 of the tube container as an insert material, and the molding equipment becomes expensive. There has been a problem that the manufacturing cost of the tube container as a product becomes high.
[0005]
Further, the tube container is formed by welding and fixing the head 1 and the body 4 that are separately molded together, or by injection molding the head 1 using the upper edge of the tube 4 that is molded into a tube shape as an insert material. Alternatively, the molding is achieved by pressing or molding by means such as compression molding. As shown in FIG. 8, the blocking layer 2 of the head 1 and the cut layer 5 of the trunk 4 are formed. Since a synthetic resin layer having no ultraviolet blocking ability is located between the two, even if the blocking layer 2 and the cut layer 5 are overlapped with each other, the synthetic resin layer positioned therebetween is passed through, There has been a problem that external ultraviolet rays enter the tube container and the ultraviolet rays cannot be sufficiently blocked.
[0006]
Therefore, the present invention was devised to solve the above-described problems in the prior art, and it is a technical problem to reliably prevent the invasion of ultraviolet rays from the head portion of the tube container. It aims at obtaining a tube container with a high price at low cost.
[0007]
[Means for Solving the Problems]
The means of the present invention for solving the above technical problem is:
A tube-shaped body having a multilayer structure with a cut layer that blocks ultraviolet rays, and a synthetic resin blocking layer that blocks ultraviolet rays by adding an ultraviolet blocking material inside the outer layer made of synthetic resin. Having a layered head,
Connecting the blocking layer of the head and the cut layer of the trunk over the entire circumference,
It is in.
[0008]
At least one of carbon black, titanium white, and aluminum powder is preferably used as the ultraviolet blocking material of the molding material for the blocking layer on the head.
[0009]
[Action]
Since the barrier layer provided in the laminated structure on the head and the cut layer provided in the laminated structure on the trunk are connected over the entire circumference at the connection between the head and the trunk, the tube container Ultraviolet rays irradiated from the outside are surely cut off at the connecting portion between the head and the torso, as a matter of course, the head having the blocking layer and the torso having the cut layer. The entire container exhibits a complete blocking ability without leakage against ultraviolet rays irradiated from the outside.
[0010]
Since the blocking layer at the head is formed of a synthetic resin material to which an ultraviolet blocking material is added, there is no need to form it into a fixed shape in advance and handle it as an insert material. Conventional compression molding means and molding equipment, etc. Can be molded as they are.
[0011]
Since the ultraviolet blocking material added to the blocking layer in the head uses at least one of carbon black, titanium white, and aluminum powder, the material cost is extremely low, which is necessary for manufacturing the tube container. The rise in raw material prices can be kept low.
[0012]
【Example】
Embodiments of the present invention will be described below with reference to FIGS.
FIG. 1 is a longitudinal front view showing the entire upper portion of a tube container according to the present invention. Like a normal synthetic resin tube container, a conical cylinder base is connected to the upper end of a tubular body 4 via a connecting portion 9. A head 1 having a configuration in which a mouth tube having an outer peripheral surface engraved with a screw is erected from an upper end edge of a shoulder portion having a shape is integrally and continuously welded and connected at an outer peripheral edge of the shoulder portion. ing.
[0013]
The head 1 has a two-layer structure of an outer layer 3 made of a synthetic resin that forms the appearance of the head 1 and a blocking layer 2 laminated inside the outer layer 3, and exhibits an ultraviolet blocking capability. The blocking layer 2 to be turned around the connecting portion 9 between the head portion 1 and the trunk portion 4 so that a part of the peripheral edge of the barrier layer 2 faces the trunk portion 4 to form a wraparound portion 2a (FIGS. 2 to 4), the wraparound portion 2a, which is a part of the blocking layer 2, integrally welds and connects the head portion 1 and the trunk portion 4.
[0014]
In the embodiment shown in FIG. 2, the body portion 4 has a two-layer structure in which a cut layer 5 that blocks ultraviolet rays is laminated inside a protective layer 7 made of synthetic resin that forms the appearance of the body portion 4. The cut layer 5 in the body 4 is formed of a synthetic resin material to which an ultraviolet blocking material is added, like the blocking layer 2 of the head 1.
[0015]
Therefore, in the embodiment shown in FIG. 2, the cut layer 5 of the trunk portion 4 is connected not only to its upper end surface but also to the wraparound portion 2a which is a part of the blocking layer 2 of the head portion 1. The connection is made integrally in almost the entire area of the portion 9.
[0016]
In the embodiment shown in FIG. 3, the body portion 4 is formed by laminating an aluminum laminate film using aluminum foil as the cut layer 5 on the inner side of the protective layer 8, and therefore, the cut layer that is an aluminum foil. A cover layer 6 made of a synthetic resin is formed on both surfaces of 5 and the body 4 has a four-layer structure as a whole.
[0017]
Therefore, in the embodiment shown in FIG. 3, the cut layer 5 of the body portion 4 is covered with the coating layer 6 on the inner side thereof, so that the cut layer 5 of the head portion 1 has a wraparound portion 2 a. , The upper end surface alone is connected integrally.
[0018]
The embodiment shown in FIG. 4 has a three-layer structure in which the body 4 is laminated with the cut layer 5 inside the protective layer 7 and the barrier layer 8 is laminated inside the cut layer 5. The layer 8 exhibits a high gas barrier function, blocks the permeation of moisture, oxygen, aroma, etc., and protects the contents stored in the tube container.
[0019]
Therefore, in the embodiment shown in FIG. 4, the cut layer 5 of the trunk portion 4 is covered with the barrier layer 8 on the inner side thereof, so , The upper end surface alone is connected integrally.
[0020]
As described above, in the illustrated embodiment, the connection between the blocking layer 2 of the head 1 and the cut layer 5 of the trunk 4 is achieved by forming the wrap-around portion 2a in a part of the blocking layer 2. However, an example of a molding technique for achieving the welded connection between the head 1 and the body 4 by forming the wraparound portion 2a in the blocking layer 2 will be described with reference to FIGS.
[0021]
The above-described molding method is a compression molding method generally called a thatcher method, and first, a core part 13 for molding the head 1 is first fitted into a tube-shaped body 4 in an outer fitting shape. Assemble (see FIG. 5).
[0022]
Next, two layers of the blocking layer material 11 and the outer layer material 12 are formed at the tip of the body 4 assembled to the core mold 13 with the tip (lower end in FIG. 6) protruding from the core mold 13. The head element body 10 having the structure is assembled (see FIG. 6).
[0023]
Assembling the head element body 10 to the front end of the body part 4 has a two-layer structure of a blocking layer material 11 and an outer layer material 12, and a flat body heated to a melting temperature is assembled to the core mold 13. The flat disk-shaped head element body 10 is punched out from the flat body in the melt softened state at the front end edge of the body portion 4 by being pressed against the front end edge of the attached body portion 4 from the blocking layer material 11 side. At the same time as cutting and forming into a shape, the head element body 10 is welded and assembled to the tip of the body portion 4 using the molten state of the head element body 10.
[0024]
As described above, the assembly of the head element body 10 to the tip of the body part 4 utilizes the punching operation of the head element body 10 from the flat body by the edge of the body part 4. 10 of the barrier layer material 11 is in a state of being in contact with the distal end surface of the trunk portion 4 from the beginning of the assembly of the head element body 10 to the trunk portion 4, and thereby the cut exposed on the distal end surface of the trunk portion 4. The end face of the layer 5 is also welded and connected to the blocking layer material 11 of the head element body 10.
[0025]
In addition, complete cutting of the head element body 10 from the flat plate body, which is a laminated structure of the blocking layer material 11 and the outer layer material 12, is performed by punching the head element body 10 from the flat plate body by the body portion 4. This is achieved by cutting the plate-like body with a punch blade along the outer peripheral surface of the body portion 4 in a state of being pressed.
[0026]
If the assembly of the head element body 10 to the front end of the body part 4 is achieved, the core 4 is assembled with the combination of the body part 4 and the head element body 10 in a cavity mold (not shown). The mold 13 is advanced toward the head element body 10, that is, toward the cavity mold, and the peripheral edge is closely welded to the front end edge of the body 4 by the core mold 13 and the cavity mold. The head element body 10 is compressed into the head 1 (see FIG. 7).
[0027]
Due to the compression molding of the head 1, the shielding layer material 11 that has been welded to the front end surface of the body portion 4 in the state of the head body 10 remains in the state of being welded to the front end surface of the body 4 as it is. Since it extends and deforms and is formed on the connection portion 9 on the head 1 side, the portion of the barrier layer material 11 welded to the front end surface of the trunk portion 4 is formed in the wraparound portion 2 a of the barrier layer 2.
[0028]
Of the carbon black, titanium white, and aluminum powder added to the blocking layer 2 as an ultraviolet blocking material, carbon black and aluminum powder exhibit approximately the same level of ultraviolet blocking capability. It will be slightly inferior to both described above.
[0029]
That is, according to an experiment, when the thickness of the formed blocking layer 2 was 0.2 mm, 0.5 mm, and 1.0 mm, an ultraviolet transmission test was performed, and carbon black was added at 0.5 weight percent. When the blocking layer 2 was molded in this way, complete UV blocking results could be obtained at each thickness, whereas in the case of titanium white, the addition amount had to be increased to 5.0 weight percent. As a result, it was not possible to obtain an ultraviolet blocking result equivalent to that of carbon black.
[0030]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be obtained.
Since the UV blocking layer of the head is molded with a synthetic resin material added with an UV blocking material, the head that has a two-layer structure of an outer layer and a blocking layer can be molded with ordinary compression molding means, As a result, the head can be molded by an existing molding apparatus by a conventional method, and a synthetic resin tube container having an ultraviolet blocking capability can be easily and easily manufactured at low cost.
[0031]
Since the blocking layer on the head and the cut layer on the body are connected over the entire circumference, ultraviolet rays can intrude into the tube container illegally between the blocking layer and the cut layer that are separately molded and combined. In addition, the combination of the blocking layer and the cut layer can sufficiently block ultraviolet rays, and the contents can be stored and held extremely safely against ultraviolet rays.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional front view of an essential part of an embodiment showing a basic configuration of the present invention.
FIG. 2 is an enlarged longitudinal sectional view of a circled portion in FIG. 1, showing an embodiment of the present invention.
FIG. 3 is an enlarged longitudinal sectional view of a circled portion in FIG. 1, showing another embodiment of the present invention.
FIG. 4 is an enlarged longitudinal sectional view of a circled portion in FIG. 1, showing still another embodiment of the present invention.
FIG. 5 is an assembling process diagram of a body portion with respect to a core mold in the method for forming a tube container of the present invention.
FIG. 6 is an assembly process diagram of a head element body with respect to a trunk part in the method for forming a tube container of the present invention.
FIG. 7 is a head molding process diagram of the tube container molding method of the present invention.
FIG. 8 is a partially enlarged longitudinal sectional view showing a main part of the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1; Head 2; Barrier layer 2a; Wrap part 3; Outer layer 4; Body part 5; Cut layer 6; Cover layer 7; Protective layer 8; Barrier layer 9; 12; Outer layer material 13; Core mold

Claims (2)

Made of a synthetic resin that blocks ultraviolet rays by adding an ultraviolet blocking material inside the tube-shaped body (4) with a multilayer structure with a cut layer (5) that blocks ultraviolet rays and the outer layer (3) made of synthetic resin The ultraviolet blocking tube container is composed of a two-layered head (1) in which two blocking layers (2) are laminated, and the blocking layer (2) and the cut layer (5) are connected over the entire circumference. The blocking layer (2) The ultraviolet blocking tube container according to claim 1, wherein at least one of carbon black, titanium white, and aluminum powder is used as the ultraviolet blocking material of the molding material.

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