Molded body and double container

Abstract

To provide a molded body and a double container in which a boundary between an outer layer and an inner layer appears clear when viewed through the outer layer.SOLUTION: A molded body 1 has a transparent or translucent outer layer 2 and an opaque inner layer 3, in which the outer layer 2 is molded together with the inner layer 3 by over-molding. A boundary BL between the outer layer 2 and the inner layer 3, which is visible on the surface of the molded body 1, is covered by the outer layer 2.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a molded article and a double container. [Background technology]

[0002] Injection molding a transparent outer layer body into an inner layer body using the inner layer body as an insert material has been known for some time as a technique for obtaining a molded body that exhibits an optical decorative function (see, for example, Patent Document 1). Conventional molded bodies such as those described in Patent Document 1 can exhibit their optical decorative function by viewing the inner layer body through the transparent outer layer body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-116521 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional molded body, the boundary between the outer layer body and the inner layer body, which is visible on the surface of the molded body, appears glaring when viewed through the outer layer body. On the other hand, depending on the preference of the user, there is a need to make the boundary look neater when viewed through the outer layer body by highlighting its outline without making the boundary appear glaring.

[0005] An object of the present invention is to provide a molded article and a double container in which the boundary between the outer layer and the inner layer appears neat when viewed through the outer layer. [Means for solving the problem]

[0006] The molded body of the present invention has a transparent or translucent outer layer and an opaque inner layer, and the outer layer is molded integrally with the inner layer by overmolding, and the boundary between the outer layer and the inner layer that appears on the surface of the molded body is covered by the outer layer.

[0007] In the molded article according to the present invention, the outer layer body may be made of a resin.

[0008] In the molded article according to the present invention, the resin is preferably an acrylic resin.

[0009] In the molded article according to the present invention, the formed article may be the outer container of a double container having a wide-mouthed inner container and an outer container that houses the inner container.

[0010] The double container according to the present invention comprises a wide-mouthed inner container and the outer container described above. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a molded article and a double container in which the boundary between the outer layer and the inner layer appears neat when viewed through the outer layer. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a plan view showing a double container according to an embodiment of the present invention, including a molded article, from above, according to an embodiment of the present invention. FIG. [Figure 2] FIG. 2 is a cross-sectional view showing the double container of FIG. 1 along the line AA. [Figure 3] FIG. 2 is a cross-sectional view showing the double container of FIG. 1 along the line BB. [Figure 4] 2 is a cross-sectional view of a main part showing the vicinity of region R of the double container of FIG. 1. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, a molded body and a double container according to one embodiment of the present invention will be described with reference to the drawings.

[0014] In the following description, axis O is the center line of a molded body according to one embodiment of the present invention. In this embodiment, axis O coincides with the center axis of a double container according to one embodiment of the present invention. In addition, in the following description, the direction extending along axis O is referred to as the axial direction. In addition, in the following description, "upper" not only has its usual meaning but also includes the meaning of the side on which the mouth of the double container is located. In addition, in the following description, "lower" not only has its usual meaning but also includes the meaning of the side on which the bottom of the double container is located.

[0015] In Fig. 1, reference numeral 10 denotes a double container according to one embodiment of the present invention. The double container 10 has an outer container 1 as a formed body according to one embodiment of the present invention. Fig. 2 shows the double container 10 in cross section taken along line AA.

[0016] Referring to FIG. 2, the double container 10 has a wide-mouthed inner container 11 in addition to the outer container 1. The outer container 1 can accommodate the inner container 11. In this embodiment, the outer container 1 has a body 1a and a bottom 1b connected to the body 1a. A storage space S1 for accommodating the inner container 11 is formed inside the outer container 1. The inner container 11 can be accommodated in the storage space S1 through an opening formed at the top end of the outer container 1, as shown in FIG. 2.

[0017] The outer container 1 has a transparent outer layer 2 and an opaque inner layer 3. The outer layer 2 is integrally formed with the inner layer 3 by overmolding.

[0018] The overmolding may be of the following two types: (1) A molding method in which a resin for the inner layer body 3 is injected into the same mold (forming die), and then a resin for the outer layer body 2 is injected. (2) A molding method in which the inner layer body 3 is placed as an insert material in the same mold (forming die), and then the resin for the outer layer body 2 is injected.

[0019] In this embodiment, the outer layer body 2 is injection molded onto the outer surface of the inner layer body 3 by the method (2) above. In this embodiment, the inner layer body 3 is placed in the same mold as an insert material, and then the resin for the outer layer body 2 is injected in several batches. This allows the outer layer body 2 to be made thick.

[0020] In the outer container 1 , the boundary BL between the outer layer body 2 and the inner layer body 3 that appears on the surface of the outer container 1 is covered by the outer layer body 2 .

[0021] In this embodiment, the boundary portion BL is an annular boundary line extending around the axis O when viewed from above in the axial direction. Referring to FIG. 4 , in this embodiment, the outer layer body 2 has a covering portion 2a that covers the upper end surface 3e of the inner layer body 3. In this embodiment, the covering portion 2a is an annular covering portion that extends around the axis O, similar to the boundary portion BL. As a result, the boundary portion BL is covered by the outer layer body 2.

[0022] In conventional outer containers, the outer layer 2 does not cover the inner layer 3e when viewed in the axial direction as shown in FIG. 4. Therefore, the boundary BL was exposed as a circular boundary line on the upper end surface of the conventional outer container. In such conventional outer containers, when the boundary BL is viewed through the outer layer 2 from diagonally below the outer container, as shown in FIG. 3, the boundary BL appears dazzling due to diffused reflection of light. That is, in conventional outer containers, the boundary BL appears dazzling when viewed through the transparent outer layer 2. In particular, when the outer layer 2 is polygonal in the axial direction and the inner layer 3 is circular, as in the outer container 1 of the present embodiment, the dazzling effect is particularly noticeable when viewed from a diagonal position of the outer layer 2 as shown in FIG. 3. This is because the wall thickness from the outer container 1 to the boundary BL is thick (the distance is long).

[0023] In contrast, in the outer container 1 according to this embodiment, the boundary portion BL is covered by the outer layer body 2, as shown in Fig. 4. The axial thickness of the covering portion 2a can be, for example, 0.3 mm. In this case, as in the conventional case, when the boundary portion BL is viewed through the outer layer body 2 from diagonally below the outer container 1, as shown in Fig. 3, the glare at the boundary portion BL is suppressed. Therefore, according to the outer container 1, even when viewed through the outer layer body 2, the boundary portion BL between the outer layer body 2 and the inner layer body 3 does not glare at all, and its outline is clearly defined, making the boundary portion BL appear neater than in the conventional case.

[0024] In this embodiment, the outer layer body 2 is made of resin. When the transparency of the outer layer body 2 is achieved by using resin, the resin has a high refractive index. Therefore, when the transparency of the outer layer body 2 is achieved by using resin as in this embodiment, it is effective in suppressing glare that occurs at the boundary portion BL.

[0025] The resin is preferably an acrylic resin, since the transparent acrylic resin has higher transparency and provides a greater effect than the transparent polyester resin.

[0026] The outer layer body 2 can be a translucent outer layer body. The inner layer body 3 can be formed as a primary molded product by, for example, injection molding or blow molding. The inner layer body 3 can be formed from an opaque resin (for example, a white resin). In this embodiment, the inner layer body 3 is formed from an acrylic resin colored white. If the outer layer body 2 and the inner layer body 3 are molded integrally using the same type of resin (for example, an acrylic resin) as in this embodiment, the adhesion between the outer layer body 2 and the inner layer body 3 can also be improved.

[0027] As described above, the formed body according to this embodiment is the outer container 1 of the double container 10 having a wide-mouthed inner container 11 and an outer container 1 that houses the inner container 11. Also, as described above, the double container 10 according to this embodiment has the wide-mouthed inner container 11 and the outer container 1.

[0028] Referring to FIG. 2, in this embodiment, the inner container 11 has a mouth 11a, a neck 11b connected to the mouth 11a, a body 11c connected to the neck 11b, and a bottom 11d connected to the body 11c. In this embodiment, the inner container 11 is a so-called jar container, with the mouth 11a having a wide opening. A storage space S11 capable of storing contents is formed inside the inner container 11. The inner container 11 can store highly viscous contents, such as cream-like cosmetics. In this embodiment, the inner container 11 is integrally molded. In this embodiment, the inner container 11 can be formed from, for example, a transparent, translucent, or opaque resin. The inner container 11 can be formed by, for example, injection molding or blow molding.

[0029] In this embodiment, the inner container 11 can be accommodated in the accommodation space S1 through an opening formed at the top end of the outer container 1, as shown in Fig. 2. In this embodiment, the inner container 11 is assembled inside the outer container 1 so that the mouth portion 11a and the neck portion 11b protrude from the top end of the outer container 1. In this embodiment, the inner container 11 is fixed to the outer container 1 by undercut fitting into the inner layer 3 of the outer container 1. However, the inner container 11 and the outer container 1 can be fixed by other fixing methods, such as screw fitting.

[0030] In this embodiment, the double container 10 also has a cap 12. The cap 12 has a top wall 12a and an attachment tube 12b connected to the top wall 12a. The cap 12 can be removably attached to the inner container 11 by threading it onto the mouth 11a of the inner container 11. However, the cap 12 and the inner container 11 can be removably attached by any method, such as undercut fitting, and is not limited to threading. In this embodiment, a seal member 13 is attached to the back side of the top wall 12a of the cap 12 to seal the mouth 11a of the inner container 11 when the cap 12 is attached to the inner container 11.

[0031] The above describes a molded body and a double container according to one embodiment of the present invention. However, the present invention is not limited to the above embodiment and can be modified in various ways within the scope of the claims. The double container 10 according to this embodiment is a double container for cosmetics. In this case, a clean boundary BL can enhance the sense of luxury. However, the molded body according to the present invention is not limited to a double container including a laminated outer container. For example, the molded body according to the present invention can be a single laminated container. Furthermore, the molded body according to the present invention can be applied to not only containers but also laminated caps. In other words, the present invention can be applied to various laminated molded bodies having a transparent or translucent outer layer and an opaque inner layer. [Explanation of symbols]

[0032] 1: outer container (molded body), 2: outer layer body, 2a: covering portion, 3: inner layer body, 11: inner container, BL: boundary portion

Claims

1. A molded article having a transparent or semi-transparent outer layer body and an opaque inner layer body, the outer layer body being integrally molded with the inner layer body by overmolding, The outer layer body has a polygonal shape when viewed in the axial direction, The inner layer body has a circular shape when viewed in the axial direction, the boundary between the outer layer body and the inner layer body that is visible on the surface of the molded body is covered with the outer layer body, The molded body is the outer container of a double container having a wide-mouthed inner container and an outer container that houses the inner container.

2. The molded article according to claim 1 , wherein the outer layer is made of a resin.

3. The molded article according to claim 2 , wherein the resin is an acrylic resin.

4. A double container comprising a wide-mouthed inner container and the outer container according to any one of claims 1 to 3.

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