JP2019031311A - Container - Google Patents

Abstract

To provide a technology which can suitably shield light in a visible short wavelength region, while securing visibility of contents, in a container.SOLUTION: A container includes a storage part which is a space capable of storing contents. The storage part is formed by a partition wall for partitioning the inside and outside of the storage part. The partition wall is formed by including a light transmitting material which becomes a base material for forming the storage part, a first light shielding agent and a second light shielding agent. The first light shielding agent includes one or a plurality of types of titanium oxide coating body. The titanium oxide coating body is the titanium oxide coating body in which titanium oxide is coated by one additive material selected from a group comprising avobenzone, cerium oxide and bismuth oxide. The second light shielding agent includes one or a plurality of types of titanium oxide composite. The titanium oxide composite is the titanium oxide composite in which one additive material selected from a group comprising yellow iron oxide, red iron oxide and black iron oxide is compounded with the titanium oxide.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a container technology.

  Conventionally, containers that can contain medicines, cosmetics, and food and drink as contents have been widely used. However, since the above-described contents are easily changed by light of a specific wavelength contained in sunlight or the like, particularly ultraviolet rays, the container is required to shield the ultraviolet rays.

  In relation to the above, Patent Document 1 discloses a resin container having a high light shielding rate of ultraviolet rays of 400 nm or less. Further, Patent Document 2 discloses a resin container having a high light blocking rate for ultraviolet rays and visible rays.

JP, 2006-033021, A Japanese Patent Laid-Open No. 10-177343

  On the other hand, as contents contained in a container, there are those that cause quality deterioration such as discoloration and decomposition when irradiated with light in a visible short wavelength region, for example, light in a wavelength range of 400 nm to 500 nm. The main cause of deterioration is an oxidation reaction using light in the above range as an energy source. On the other hand, the container described in Patent Document 1 can mainly shield ultraviolet rays having a wavelength of 400 nm or less, but cannot sufficiently shield light having a wavelength exceeding 400 nm. Therefore, there is a problem that the contents deteriorate when the contents deteriorated by the light in the visible short wavelength region described above are accommodated.

  The technique described in Patent Document 2 describes a resin container that shields ultraviolet rays and visible light by containing a carbon black pigment in the container. However, when light is shielded by the above method, even the light in the visible region is almost shielded, making it difficult to visually recognize the liquid level of the contents in the container, and the user confirms the remaining amount of contents. There is a possibility that the problem becomes difficult and the design of the container is limited. From the above, there has been a demand for a technique that can simultaneously suppress the deterioration of the contents due to light in the visible short wavelength region and ensure the visibility of the contents.

  The present invention has been made in view of the above problems, and an object of the present invention is to suitably shield ultraviolet rays and light in the visible short wavelength region while ensuring the visibility of contents in a container. Is to provide technology that can

In order to solve the above problems, the present invention employs the following means. That is, the present invention is a container including a storage portion that is a space capable of storing contents, wherein the storage portion is formed by a partition that separates the inside and the outside of the storage portion, A light-transmitting material serving as a base material for forming the housing portion, a first light-shielding agent, and a second light-shielding agent are formed. The first light-shielding agent comprises one or more types of titanium oxide coverings. The titanium oxide coating is the titanium oxide coating coated with titanium oxide with one or more additive materials selected from the group consisting of avobenzone, cerium oxide, and bismuth oxide, and the second light-shielding agent is , One or a plurality of types of titanium oxide composites, wherein the titanium oxide composites include yellow iron oxide, red iron oxide,
And the titanium oxide composite in which one or a plurality of additive materials selected from the group consisting of black iron oxide are combined with titanium oxide.

  According to the present invention, by selectively blocking ultraviolet light and light in the visible short wavelength region, deterioration of the contents can be suppressed and visibility of the contained contents can be ensured.

  In the present invention, the partition may be formed of a mixed material in which the first light-shielding agent and the second light-shielding agent are mixed with the light transmissive material.

  In the present invention, the partition includes a first light shielding layer made of a material in which the light transmissive material includes only one of the first light shielding agent and the second light shielding agent, and the light transmissive property. A second light-shielding layer made of a material containing only the other of the first light-shielding agent and the second light-shielding agent may be laminated. By doing so, the color tone of the partition wall by the second light-shielding agent is suppressed by the white-based hiding power of the first light-shielding agent. As a result, design restrictions due to color tone can be reduced, and the degree of freedom in the design of the container can be increased.

  Further, the partition wall may be laminated such that the first light shielding layer is located on the outer side of the housing part with respect to the second light shielding layer. By doing so, the color tone of a partition can be suppressed more and the freedom degree in the design surface of a container can be raised more.

  In the present invention, the partition wall is formed by a base material layer formed of the light transmissive material and a coating layer formed on the surface of the base material layer. You may form with the coating material containing 1 light shielding agent and said 2nd light shielding agent. By doing so, even when the partition is formed of a light-transmitting material that is relatively difficult to knead a light-shielding agent such as glass, the partition can be easily provided with a light-shielding property.

  Further, in the present invention, the accommodating portion is formed by a base material layer formed of the light transmissive material and a coating film formed on a surface of the coating film layer, A first coating layer formed by a paint containing only one of the first light-shielding agent and the second light-shielding agent, and only the other of the first light-shielding agent and the second light-shielding agent is included. The second coating layer formed by the coating material to be formed may be laminated. By doing so, the color tone by the 2nd coating agent contained in a 2nd coating film layer can be concealed with the white-type concealing power which the 1st light shielding agent contained in a 1st coating film layer has. As a result, the degree of freedom in the design of the container can be further increased.

  Furthermore, the coating film layer may be laminated so that the first coating film layer is located on the outer side of the housing portion with respect to the second coating film layer. By doing so, the color tone of a partition can be suppressed more and the freedom degree in the design surface of a container can be raised more.

  According to the present invention, in the container, light in the visible short wavelength region can be suitably shielded while ensuring the visibility of the contents.

FIG. 1 is a view showing a container according to the first embodiment. FIG. 2 is a view showing a cross section of the container according to the first embodiment. FIG. 3A is a schematic view of a material constituting the light shielding agent according to the first embodiment. FIG. 3B is a schematic view of a material constituting the light shielding agent according to the first embodiment. FIG. 4 is a view showing a cross section of the container according to the second embodiment. FIG. 5 is a view showing a cross section of the container according to the third embodiment. FIG. 6 is a view showing a cross section of the container according to the fourth embodiment.

  Next, embodiments of the present invention will be described with reference to the drawings. However, the embodiments described below are exemplifications for carrying out the present invention, and the dimensions, materials, shapes, relative arrangements, and the like of the components described in the present embodiments are particularly specific. As long as there is not, it is not the meaning which limits the technical scope of invention to them. Moreover, the content accommodated in the container which concerns on this invention is not specifically limited. Moreover, this invention can accommodate various things, such as a chemical | medical agent, cosmetics, food-drinks, for example. The state of the contents may be any of solid, liquid, and gas. However, the container according to the present invention can suitably suppress the deterioration of the contents, particularly when the one that is deteriorated by ultraviolet light or visible light in the visible short wavelength region is stored as the contents.

  In the present invention, visible light refers to electromagnetic waves having a wavelength that can be seen by human eyes. Generally, the lower limit of the wavelength of electromagnetic waves corresponding to visible light is approximately 360 nm to 400 mm, and the upper limit is approximately 760 nm to 830 nm. In the present specification, visible light particularly refers to electromagnetic waves having a wavelength of 400 nm to 830 nm. Further, the visible region refers to a visible light wavelength range, that is, a range of 400 nm to 830 nm. In particular, the visible short wavelength region refers to a range of 400 nm to 500 nm. In addition, the visible long wavelength region indicates a range greater than 500 nm and 830 nm or less. Ultraviolet light is also called UV or ultraviolet light, and generally refers to electromagnetic waves having a wavelength longer than that of X-rays and shorter than the shortest wavelength of visible light. In the present specification, the ultraviolet ray particularly refers to an electromagnetic wave having a wavelength of 10 nm to 400 nm.

  In addition, the light shielding rate in the present specification is a ratio at which incident light having a specific wavelength incident on an object is blocked from passing through the object by reflection or absorption, and is expressed as a percentage. In other words, the light blocking ratio is a ratio at which incident light having a specific wavelength does not pass through the object. That is, the light shielding rate can be calculated by a calculation formula of 100−transmittance [%].

<First Embodiment>
FIG. 1 is a view showing a container 100 according to the present embodiment. The container 100 according to the first embodiment described below stores liquid cosmetic C as an example of the contents. Cosmetic C has the property of causing quality deterioration such as discoloration and decomposition when irradiated with light having a wavelength of 500 nm or less, that is, ultraviolet light having a wavelength of less than 400 nm or light having a wavelength of 400 nm to 500 nm. The quality of the cosmetic C is particularly deteriorated by visible light having a wavelength of 400 to 460 nm. Cosmetic C corresponds to the contents in the present invention. The container 100 according to the present embodiment has a light shielding structure S <b> 1 to be described later, thereby ensuring visibility of the stored contents from the outside of the container 100 and design of the container 100. By suitably shielding light of 500 nm or less, deterioration of the cosmetic C can be suitably suppressed. This will be described in detail below.

  As shown in FIG. 1, the container 100 is formed on a main body 10 having a container 30 for containing cosmetic C and an upper part of the main body 10, and discharges the cosmetic C to the outside of the container 100. And a discharge part 20 for the purpose. The accommodating part 30 is a space formed inside the main body part 10 and is a space in which the cosmetic C is accommodated. The container 100 stores the cosmetic C by storing the cosmetic C in the storage unit 30 and discharges the cosmetic C stored in the storage unit 30 from the discharge unit 20 to the outside of the container 100.

  In addition, the aspect of the discharge part 20 is not specifically limited. The discharge part 20 may be comprised by the opening formed in the upper part of the main-body part 10, and the lid | cover which can open and close an opening freely, or by the nozzle which is provided in an opening and opening and injects cosmetics C outside. It may be configured.

  Next, the main body 10 will be described. As shown in FIG. 1, the main body portion 10 forms a housing portion 30 by the partition wall 1. In other words, the partition wall 1 is a wall that separates the inside and the outside of the housing portion 30. Due to the presence of the partition wall 1, visible light and ultraviolet rays applied to the container 100 from the outside of the container 100 reach the partition wall 1 before the cosmetic C. In the following description, in the partition wall 1, the storage unit 30 side is defined as “inside”, and the side opposite to the storage unit 30 and the outside of the container is defined as “outside”.

FIG. 2 is a schematic diagram in which the cross section of the partition wall 1 is enlarged. As shown in FIG. 2, the partition wall 1 is formed by kneading in a state where two kinds of light-shielding agents are mixed, using a light-transmitting material 13 made of a resin-based material having a high visible light transmittance as a base material. Yes. Hereinafter, the two types of light shielding agents are referred to as a first light shielding agent 11 and a second light shielding agent 12, respectively. Further, the structure of the partition wall 1 shown in FIG. 2 is referred to as a light shielding structure S1. In the light blocking structure S1 of the partition wall 1, the first light blocking agent 11 and the second light blocking agent 12 are mixed and arranged at random positions. As will be described later, the first light-shielding agent 11 is constituted by a titanium oxide coated body X that is a material obtained by coating fine particles of titanium oxide as a base material with an additive material a such as avobenzone described later. Moreover, the 2nd light shielding agent 12 is comprised by the titanium oxide composite Y which is the material which processed the particle | grains of the titanium oxide with additive materials b, such as yellow iron oxide mentioned later.

FIG. 3A is a schematic diagram for explaining the titanium oxide covering body X included in the first light shielding agent 11. The titanium oxide coated body X has a characteristic that the ultraviolet light shielding property is high and the visible light shielding property is low. As shown in FIG. 3A, the titanium oxide coated body X is formed by coating the surface of finely divided titanium oxide with an additive material a. The additive material a is avobenzone, cerium oxide,
One or more types can be selected from the group consisting of bismuth oxide. Titanium oxide usually has a white-based hiding power by scattering visible light, so it has a high light-shielding property against visible light. However, by making fine particles, it increases visible light transmittance while leaving some hiding power. be able to. The particle diameter of titanium oxide is preferably about 15 nm, for example. In addition, the additive material a reflects or absorbs ultraviolet rays, so that it has high ultraviolet light shielding properties and low hiding power. Therefore, the light-shielding agent 11 according to the present embodiment includes the titanium oxide coated body X in which the surface of finely divided titanium oxide is coated with the additive material a, thereby increasing the ultraviolet light shielding rate in the light-shielding structure S1 of the partition wall 1. While ensuring the transparency of visible light. In addition, since the titanium oxide covering X has a slight white-based hiding power, the first light-shielding agent 11 can reduce the color tone due to the second light-shielding agent in the light-shielding structure S1 of the partition wall 1.

FIG. 3B is a schematic diagram for explaining the titanium oxide composite Y included in the second light shielding agent 12. The titanium oxide composite Y has a high light blocking property for light in the visible short wavelength region. As shown in FIG. 3B, the titanium oxide composite Y is a composite formed by adding fine particles of an additive material b, which is an iron oxide-based material, to titanium oxide. By including the titanium oxide composite Y, the second light shielding agent 12 according to the present embodiment acts to increase the light shielding rate of light in the visible short wavelength region in the light shielding structure S1 of the partition wall 1. The second light shielding agent 12 according to the present embodiment uses yellow iron oxide as the additive material b. The weight ratio of titanium oxide to yellow iron oxide in the titanium oxide composite Y to which yellow iron oxide is added is preferably about titanium oxide: yellow iron oxide = 70: 30, and the titanium oxide composite Y The particle diameter is preferably about 100 nm. The iron oxide-based additive material b constituting the second light-shielding agent 12 is not limited to the above, and instead of yellow iron oxide, one or more types of red iron oxide and black iron oxide are selected. Can do. However, since the titanium oxide composite Y using yellow iron oxide as the additive material b has a relatively low degree of coloration on the partition walls 1, the additive material b is preferably made of yellow iron oxide. By doing so, light in the visible short wavelength region can be suitably shielded and coloring of the partition walls 1 can be reduced. Note that the second light-shielding agent 12 constituted by the titanium oxide composite Y according to this embodiment causes the partition wall 1 to have a slight yellow color tone by being included in the light-shielding structure S1, but the first light-shielding agent described above. The yellowness of the partition wall 1 is reduced by the white-based hiding power of the agent 11.

Note that the number of types of the titanium oxide covering body X included in the first light shielding agent 11 and the number of types of the titanium oxide composite Y included in the second light shielding agent 12 are not limited to the above. That is, the first light-shielding agent 11 uses, for example, each of avobenzone, cerium oxide, and bismuth oxide as the additive material a.
A plurality of types of titanium oxide coverings X may be included. Similarly, the second light-shielding agent 12 may include, for example, a plurality of types of titanium oxide composites Y each containing yellow iron oxide, red iron oxide, and black iron oxide as the additive material b.

  The light transmissive material 13 is a material capable of transmitting visible light. More specifically, the light transmissive material 13 is a material having a relatively high visible light transmittance, in other words, a material having a low visible light shielding rate. The light transmissive material 13 is a material that is generally used for a container that is transparent, and has a transparency that allows a user to visually recognize the contents when the partition wall 1 is formed as a single unit. is there. That is, the light transmissive material 13 functions as a base material for forming the partition wall 1 in the light shielding structure S1 and allows the user to visually recognize the contents of the container 100 by transmitting visible light. To do. The light transmissive material 13 according to this embodiment includes, for example, polyethylene (PE) resin, polypropylene (PP) resin, polycarbonate (PC) resin, acrylic resin, polyester (PET) resin, polyvinyl chloride (PVC) resin, ABS resin. And a resin material having transparency, such as a fluororesin, can be appropriately selected.

  The partition 1 having such a light shielding structure S1 can be formed by, for example, blow molding. In blow molding, a mixed material obtained by mixing the powders of the first light-shielding agent 11 and the second light-shielding agent 12 into pellets of the light-transmitting material 13 as a raw material is extruded into a tube shape, and air is pressed into the tube to partition 1 and the accommodating part 30 are shape | molded. However, the molding method of the light shielding structure S1 is not limited to the above, and can be appropriately selected according to the light transmissive material 13 serving as a base material.

[Action / Effect]
By configuring the light shielding structure S1 as described above, the partition wall 1 according to the present embodiment has a high light shielding rate for light in the ultraviolet ray and visible short wavelength region and a low light shielding rate for visible light in the visible long wavelength region. ing. When sunlight is irradiated to the container 100 in which the accommodating part 30 is formed by such a partition wall 1, most of the ultraviolet light contained in the sunlight can be shielded by the first light shielding agent 11. Further, most of the light in the visible short wavelength region can be shielded by the second light shielding agent 12. As a result, deterioration of the cosmetic C stored in the storage unit 30 can be suppressed. And since the light shielding rate in the visible light in the visible long wavelength region by the first light shielding agent 11, the second light shielding agent 12, and the light transmissive material 13 constituting the light shielding structure S1, the visible light in the visible long wavelength region is low. Most of the light passes through the partition wall 1. As a result, the user can visually recognize the cosmetic C stored in the storage unit 30 from the outside of the container 100. That is, the container 100 according to the present embodiment can prevent deterioration of the cosmetic C and ensure visibility of the cosmetic C by selectively blocking ultraviolet rays and light in the visible short wavelength region. it can. In addition, the container 100 is suppressed in color tone by the white-based hiding power of the first light shielding agent 11. As a result, design restrictions due to color tone can be reduced, and the degree of freedom in design of the container 100 can be increased.

The cosmetic C according to the present embodiment is deteriorated in quality such as discoloration and decomposition when irradiated with ultraviolet rays having a wavelength of less than 400 nm or light in a visible short wavelength region having a wavelength of 400 nm to 500 nm. In order to store such cosmetic C, it is sufficient to increase the shading rate of visible light and ultraviolet light having a wavelength of 500 nm or less. On the other hand, if the light shielding rate of visible light having a wavelength larger than 500 nm is high, the visibility of the liquid level of the cosmetic C as the content is lowered. Then, the user cannot grasp the remaining amount of the cosmetic C, and it may be difficult to determine the timing of refilling or replacement of the cosmetic C.

  On the other hand, according to the container 100 according to the present embodiment, as described above, it is possible to increase the light blocking rate of ultraviolet light and light in the visible short wavelength region while reducing the light blocking rate in the visible long wavelength region. As a result, the quality of the cosmetic C is maintained by suppressing the deterioration of the cosmetic C, and the user visually recognizes the liquid level of the cosmetic C by increasing the visibility of the interior of the housing 30 to make up. It is possible to easily grasp the remaining amount of the charge C. Furthermore, since various colors can be given to the partition wall 1 by suppressing the color tone of the partition wall 1, the appearance of the container 100 can be improved, and the appeal power of the container 100 as a product package can be increased. it can.

  Further, the partition wall 1 having the light shielding structure S1 according to the present embodiment can be formed by the above-described general materials and forming methods. Therefore, it is easy to provide the container 100 with a light-shielding property with respect to wavelengths below the visible short wavelength region, and can be realized at a lower cost than in the case of using a special material or processing method.

  In addition, as for the container 100 which concerns on this embodiment, the whole container 100 may have light-shielding structure S1. The container 100 may be formed into a bottle shape in which the entire container 100 is constituted by the partition wall 1 by, for example, blow molding. By doing so, light shielding structure S1 is made in the whole container 100, and the light shielding performance of the container 100 can be improved more. Moreover, since the whole container 100 can be manufactured at once, the man-hour of manufacture can be reduced rather than the case where the partition 1 and another part are manufactured separately.

  In the container 100 according to the present embodiment, a part of the partition wall 1 may have the light shielding structure S1. By forming a part of the partition wall 1 of the main body 10 with the light shielding structure S1, a confirmation window for visually recognizing the liquid level of the cosmetic C from the outside may be formed. The portion may be formed of a material that completely blocks ultraviolet and visible light.

  In the present invention, the aspect of the container 100 is not limited to the above-described embodiment. The container 100 can be selected from various forms such as a flexible tube type and a pouch type in addition to the bottle type, depending on the material and contents. In addition, the container 100 of the present embodiment may be a blister container that stores a foundation refill or the like, for example. Further, the partition wall 1 may be a sheet shape or a film shape.

Second Embodiment
Next, a second embodiment will be described. FIG. 4 is an enlarged schematic view of the cross section of the partition wall 2 of the container 200 according to the second embodiment. The container 200 according to the second embodiment is different from the container 100 according to the first embodiment in that the light blocking structure S2 of the partition wall 2 is formed by stacking a plurality of layers made of different materials. Hereinafter, the second embodiment will be described with a focus on differences from the first embodiment, and the same configurations as those of the first embodiment will be denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 4, the light shielding structure S <b> 2 of the partition wall 2 according to the second embodiment includes a first light shielding layer 21 in which a first light shielding agent 11 is kneaded into a light transmissive material 13 that is a base material, a base material, The light transmissive material 13 is formed by laminating two layers of a second light shielding layer 22 in which the second light shielding agent 12 is kneaded. Specifically, the first light shielding layer 21 includes only the first light shielding agent 11 out of the first light shielding agent 11 and the second light shielding agent 12. On the other hand, the second light shielding layer 22 includes only the second light shielding agent 12 out of the first light shielding agent 11 and the second light shielding agent 12. In other words, the first light shielding layer 21 contains the first light shielding agent 11 and does not contain the second light shielding agent 12. The second light shielding layer 22 contains the second light shielding agent 12 and does not contain the first light shielding agent 11. That is, the light shielding structure S2 includes the first light shielding agent 11 and the second light shielding agent 12 in separate layers. In the light shielding structure S <b> 2, the first light shielding layer 21 is laminated outside the partition wall 2, and the second light shielding layer 22 is laminated inside the partition wall 2.

  The partition wall 2 having such a light-shielding structure S2 includes, for example, a molding material obtained by mixing the first light-shielding material 11 with pellets of the light-transmitting material 13 as a raw material and the pellets of the second light-shielding material 12 with the pellets of the light-transmissive material 13. By molding the molding material mixed with the powder by multi-layer blow molding or multi-layer extrusion interlocking molding, the first light-shielding layer 21 and the second light-shielding layer 22 can be molded. Alternatively, the first light shielding layer 21 and the second light shielding layer 22 may be separately formed into a sheet shape and then bonded together. Moreover, the molding material which mixed the light transmissive material 13 and the 1st light shielding agent 11 is blow-molded, the accommodating part 30 is formed only by the 2nd light shielding layer 22, and the 1st light shielding layer 21 formed in the sheet form from it is formed. May be pasted.

[Action / Effect]
The partition wall 2 according to the second embodiment configured by the light blocking structure S2 as described above is configured to have a high light blocking rate for ultraviolet rays and light in the visible short wavelength region and a low light blocking rate for visible light in the visible long wavelength region. ing. When sunlight is irradiated to the container 200 in which the housing part 30 is formed by such a partition wall 2, the sunlight first reaches the first light shielding layer 21 positioned outside the partition wall 2. At this time, most of the ultraviolet light contained in the sunlight can be shielded by the first light shielding agent 11 contained in the first light shielding layer 21. Next, most of the light in the visible short wavelength region that has passed through the first light shielding layer 21 can be shielded by the second light shielding agent 12 included in the second light shielding layer 22. As a result, the container 200 according to the second embodiment can suppress the deterioration of the cosmetic C stored in the storage unit 30. And since the light shielding rate of the 1st light shielding layer 21 and the 2nd light shielding layer 22 with respect to the visible light of a visible long wavelength area | region is low, most visible lights of a visible long wavelength area permeate | transmit the partition 2. FIG. As a result, the user can visually recognize the cosmetic C stored in the storage unit 30 from the outside of the container 200. Furthermore, in the container 200 according to the second embodiment, the first light shielding layer 21 is laminated outside the partition wall 2. By doing so, the color tone of the second light-shielding agent 12 contained in the second light-shielding layer 22 is changed by the white hiding power of the first light-shielding agent 11 contained in the first light-shielding layer 21. Can be concealed from the outside. Therefore, the color tone can be further suppressed as compared with the container 100 according to the first embodiment. As a result, the degree of freedom in the design of the container 200 can be further increased.

  In addition, the direction where the 1st light shielding layer 21 and the 2nd light shielding layer 22 are laminated | stacked in light shielding structure S2 which concerns on this embodiment is not limited to the above-mentioned aspect. That is, the first light shielding layer 21 may be positioned inside the second light shielding layer 22. However, since the first light shielding layer 21 is arranged outside the second light shielding layer 22, the color tone of the partition wall 2 can be further suppressed.

  In the second light shielding layer 22 and the first light shielding layer 21, each light transmissive material 13 may be composed of a different material having light transmittance. In this case, the first light shielding layer made of different base materials. 21 and the 2nd light shielding layer 22 are joined and laminated | stacked with an adhesive agent. However, in the light shielding structure S <b> 2 according to the present embodiment, the first light shielding layer 21 and the second light shielding layer 22 are the same because the base materials of the first light shielding layer 21 and the second light shielding layer 22 are the same. Can be laminated directly. As a result, the first light-shielding layer 21 and the second light-shielding layer 22 are made of different light-transmitting materials 13 and the visible light transmittance in the long wavelength region is increased as compared with the case where they are laminated using an adhesive. At the same time, the cost can be reduced.

Further, the number of light shielding layers stacked in the light shielding structure S2 is not limited to the above. The partition wall 2 may have a three-layer structure in which the second light shielding layer 22 is stacked so as to be sandwiched between the first light shielding layers 21 from both sides, for example.

<Third Embodiment>
Next, a third embodiment will be described. FIG. 5 is an enlarged schematic view of the cross section of the partition wall 3 of the container 300 according to the third embodiment. As shown in FIG. 5, in the container 300 according to the third embodiment, the light shielding structure S <b> 3 of the partition wall 3 is formed on the outer surface of the base material layer 32 formed of the light transmissive material 13 and the first light shielding agent 11 and the first light shielding material 11. 2 It differs from the container 100 according to the first embodiment in that a coating layer 31 including the light shielding agent 12 is formed. Hereinafter, the third embodiment will be described with a focus on differences from the first embodiment, and the same configurations as those of the first embodiment will be denoted by the same reference numerals, and detailed description thereof will be omitted.

  The base material layer 32 shown in FIG. 5 is formed of the light transmissive material 13 having a high visible light transmittance. The light transmissive material 13 has a function as a base material of the partition 3. That is, the base material layer 32 is a layer that maintains the shape of the partition wall 3. The light transmissive material 13 according to this embodiment includes, for example, polyethylene (PE) resin, polypropylene (PP) resin, polycarbonate (PC) resin, acrylic resin, polyester (PET) resin, polyvinyl chloride (PVC) resin, ABS resin. In addition to a transparent resin material such as fluororesin, a transparent glass material such as quartz glass can be selected.

  The coating layer 31 shown in FIG. 5 is formed so as to cover the outer surface of the base material layer 32. In the coating layer 31, the first light shielding agent 11 and the second light shielding agent 12 are mixed and randomly arranged. Further, the coating film layer 31 does not include the light transmissive material 13 that becomes the base material of the partition wall 3.

  The light shielding structure S3 is, for example, spray coating on the outer surface of the base material layer 32 with a mixed paint in which the powder of the first light shielding agent 11 and the powder of the second light shielding agent 12 are dispersed in a solvent such as water or oil. It can form by apply | coating by the method of.

[Action / Effect]
According to the container 300 according to the third embodiment, similarly to the container 100 according to the first embodiment, the deterioration of the cosmetic C is suppressed by selectively blocking ultraviolet light and light in the visible short wavelength region. At the same time, the visibility of the cosmetic C can be secured. In addition, since the color tone is suppressed by the white-based hiding power of the first light shielding agent 11, design restrictions due to the color tone can be reduced, and the degree of freedom in the design of the container 300 can be increased.

  Furthermore, according to such a light shielding structure S3, after forming the base material layer 32, the coating layer 31 is formed by applying a mixed paint to the base material layer 32 thus formed. As a result, even when the partition 3 is formed of the light transmissive material 13 in which it is relatively difficult to knead a light shielding agent such as glass, the partition 3 can be easily provided with a light shielding property. Moreover, the thickness of the coating film layer 31 can be easily adjusted by adjusting the application amount of the mixed paint. As a result, the light shielding rate of the partition walls 3 can be easily adjusted.

  The coating layer 31 may be formed on the inner surface of the base material layer 32. However, when the coating layer 31 is formed by painting as described above, the coating layer 31 can be formed more easily on the outer surface than on the inner surface of the base material layer 32.

<Fourth embodiment>
Next, a fourth embodiment will be described. FIG. 6 is an enlarged schematic view of the cross section of the partition wall 4 of the container 400 according to the fourth embodiment. As shown in FIG. 6, in the container 400 according to the fourth embodiment, the light shielding structure S <b> 4 of the partition wall 4 includes the first light shielding agent 11 on the outer surface of the base material layer 32 formed of the light transmissive material 13. Unlike the container 300 according to the third embodiment, the other points are the same in that the first coating layer 411 and the second coating layer 412 containing the second light shielding agent 12 are laminated. Hereinafter, the fourth embodiment will be described with a focus on differences from the third embodiment, and the same configurations as those of the third embodiment will be denoted by the same reference numerals, and detailed description thereof will be omitted.

  The coating layer 41 shown in FIG. 6 is formed so as to cover the outer surface of the base material layer 32. In the light shielding structure S4, the coating layer 41 is such that the first coating layer 411 is located on the outermost side in the partition wall 4, and the second coating layer 412 is located between the first coating layer 411 and the substrate. Are stacked. Further, the first coating layer 411 and the second coating layer 412 do not include the light transmissive material 13 that becomes the base material of the partition wall 4.

  In order to form the light shielding structure S4, first, the second coating layer is formed by applying a coating material in which the powder of the second light shielding agent 12 is dispersed in a solvent such as water or oil to the outer surface of the base material layer 32. 412 is formed. Next, the 1st coating layer 411 is formed by apply | coating the coating material which disperse | distributed the powder of the 1st light shielding agent 11 in solvents, such as water and an oil agent, on the 2nd coating layer 412. FIG. By doing so, the coating-film layer 41 is formed and becomes light-shielding structure S4.

[Action / Effect]
The container 400 which concerns on 4th Embodiment has an effect similar to the container 300 which concerns on 3rd Embodiment. In the container 400 according to the fourth embodiment, the first coating layer 411 is further laminated on the outside of the second coating layer 412. By doing so, the color tone of the second coating agent contained in the second coating layer 412 is changed by the white hiding power of the first light-shielding agent 11 contained in the first coating layer 411. 412 can be concealed from the outside. Therefore, the color tone can be further suppressed as compared with the container 300 according to the third embodiment. As a result, the degree of freedom in the design of the container 400 can be further increased.

  In addition, the direction where the 1st coating film layer 411 and the 2nd coating film layer 412 are laminated | stacked in light-shielding structure S4 which concerns on this embodiment is not limited to the above-mentioned aspect. In other words, the first coating layer 411 may be positioned inside the second coating layer 412. However, the color tone of the partition walls 4 can be further suppressed by disposing the first coating layer 411 outside the second coating layer 412. Further, the number of light shielding layers stacked in the light shielding structure S4 is not limited to the above. The partition wall 4 may have a three-layer structure in which the first coating layer 411 is sandwiched between the second coating layers 412 and stacked.

[Light shielding structure verification test]
Hereinafter, a test for verifying the effect of the light shielding structure according to the present invention will be described. In the experiment, the light shielding rate was measured when a specific wavelength was applied to the plate having the light shielding structure according to the present invention.

(Experimental example)
As an experimental example, the light shielding rate of a plate-shaped test piece having the light shielding structure S1 according to the first embodiment was measured. In the experimental example, a titanium oxide coated body X in which titanium oxide is coated with avobenzone and a titanium oxide composite body Y in which yellow iron oxide is combined with titanium oxide are mixed to form polyethylene (PE) as the light transmissive material 13. It is kneaded into resin and molded into a plate shape. In the experimental example, the addition rate of the titanium oxide coated body X was 1.0%, and the addition rate of the titanium oxide composite Y was 0.05%. The thickness of the test piece was 1.2 mm.

(Comparative example)
As a comparative example, the light shielding rate of a plate-shaped test piece in which only the titanium oxide coated body X was kneaded into polyethylene (PE) resin was measured. The addition rate of the titanium oxide coated body X in the comparative example was 1.0%. The thickness of the test piece of the comparative example was 1.2 mm. The experimental example corresponds to a comparative example in which 0.05% of titanium oxide composite Y is added.

(Test method)
The test measured the transmittance | permeability in the thickness direction of the test piece which concerns on an experiment example and a comparative example with the spectrophotometer by JASCO Corporation. And the light-shielding rate for every wavelength range of each test piece was computed from the measured transmittance | permeability. The wavelength region was 400 nm to 460 nm, 460 nm to 500 nm, and 500 nm to 700 nm.

(Test results)
Table 1 shows the results of the light shielding structure verification test.

  As shown in Table 1, in the experimental example, the light blocking rate of light in the wavelength region of 400 nm to 460 nm was 87.6%, and the light blocking rate of light in the wavelength region of 460 nm to 500 nm was 74.5%. From this, it was confirmed that the light shielding structure has a high light shielding property in the visible short wavelength region of 400 nm to 500 nm, particularly in the range of 400 nm to 460 nm. On the other hand, in the experimental example, the light shielding rate at 500 nm to 700 nm was 54.2%. From this, it was confirmed that the light shielding structure has high transparency in the visible long wavelength region of 500 nm to 700 nm.

  Further, as shown in Table 1, in the comparative example, the light blocking rate of light in the wavelength region of 400 nm to 460 nm is 69.1%, and the light blocking rate of light in the wavelength region of 460 nm to 500 nm is 56.2%, 500 nm to 700 nm. The result was that the light shielding rate in the wavelength region was 45.0%. Comparing the experimental example with the comparative example, the experimental example showed a light shielding rate increased by 18.5% in the wavelength region of 400 nm to 460 nm and 18.3% in the wavelength region of 460 nm to 500 nm as compared with the comparative example. From this, the increase effect of the light shielding rate in the visible long wavelength region by the titanium oxide composite Y was confirmed. On the other hand, the increase in the light shielding rate relative to the comparative example of the experimental example was only 9.2% in the wavelength region of 500 nm to 700 nm. From this, it was confirmed that the increase in the light shielding rate in the visible long wavelength region of 500 nm to 700 nm due to the addition of the titanium oxide complex Y was small.

  The various contents described above can be combined as much as possible without departing from the technical idea of the present invention.

1, 2, 3, 4 ... partition 11 ... first light shielding agent 12 ... second light shielding agent 13 ... light transmissive material 21 ... first light shielding layer 22 ... second light shielding Layers 31, 41 ... Coating layer 32 ... Base material layer 10 ... Main body 20 ... Discharge part 30 ... Storage part S1, S2, S3, S4 ... Light shielding structure X ... -Titanium oxide coating Y ... Titanium oxide composite a, b ... Additive material

Claims (7)

A container having a container that is a space in which contents can be stored,
The housing portion is formed by a partition wall that separates the inside and the outside of the housing portion,
The partition wall is formed to include a light transmissive material serving as a base material for forming the housing portion, a first light shielding agent, and a second light shielding agent.
The first light-shielding agent includes one or more types of titanium oxide coatings,
The titanium oxide coating is the titanium oxide coating coated with titanium oxide by one or more additive materials selected from the group consisting of avobenzone, cerium oxide, and bismuth oxide,
The second light-shielding agent includes one or more types of titanium oxide composites,
The titanium oxide composite is the titanium oxide composite in which one or more additive materials selected from the group consisting of yellow iron oxide, red iron oxide, and black iron oxide are combined with titanium oxide.
Container. The partition is formed of a mixed material in which the first light-shielding agent and the second light-shielding agent are mixed with the light transmissive material.
The container according to claim 1. The partition includes a first light-shielding layer made of a material that includes only one of the first light-shielding agent and the second light-shielding agent in the light-transmissive material, and the first light-shielding material in the light-transmissive material. A second light-shielding layer made of a material containing only the other of the agent and the second light-shielding agent is formed by being laminated,
The container according to claim 1. The partition wall is laminated so that the first light shielding layer is located on the outer side of the housing part with respect to the second light shielding layer.
The container according to claim 3. The partition is formed by a base material layer formed of the light transmissive material and a coating layer formed on the surface of the base material layer,
The coating layer is formed of a paint containing the first light-shielding agent and the second light-shielding agent.
The container according to claim 1. The housing portion is formed by a base material layer formed of the light transmissive material and a coating layer formed on the surface of the base material layer,
The coating layer includes a first coating layer formed of a paint containing only one of the first light-shielding agent and the second light-shielding agent, the first light-shielding agent, and the second light-shielding agent. A second coating layer formed by a paint containing only the other of the two, is formed by being laminated,
The container according to claim 1. The coating layer is laminated so that the first coating layer is located on the outer side of the housing part with respect to the second coating layer,
The container according to claim 6.

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