JP2019131258A - Laminated foamed container - Google Patents

Abstract

To provide a laminated foamed container which improves visibility, and has an appearance property which recalls the texture.SOLUTION: In a laminated formed container which has a container body 10 made of synthetic resin where an opening portion, a drum portion, and a bottom portion are continuously provided from the upper to the lower in this order, the container body comprises a coloring layer 21 which is made of a first synthetic resin including coloring agents, and a foam layer 23 which is made of a second synthetic resin including a plurality of air bubbles 24, and is arranged to the outside in the radial direction of the container body compared with the coloring layer.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a laminated foam container.

  A bottle-shaped container for storing contents is generally formed of various synthetic resins such as polyethylene, polypropylene, polystyrene, polyester (PET, PBT, etc.). Further, Patent Document 1 below discloses a container in which a container body is formed in a single layer or multiple layers using a composite material obtained by mixing an additive with a synthetic resin.

JP 2001-315746 A

  In recent years, in order to differentiate products and the like, containers having high design properties having various shapes or appearances have begun to be put on the market. There is a need to exhibit a more characteristic or original appearance in a container that places importance on such design, but it is difficult to meet this type of need in the conventional container described above. There was room for improvement in terms of improving design properties.

  In addition, although decorating by printing or attaching a label on the outer surface of the container, for example, it is conceivable, but in these decorations, for example, two-dimensional appearance tends to occur, and appearance is improved. There was a need for further improvements. Furthermore, it is difficult to cleanly decorate the outer surface of a three-dimensional container, and there is a possibility of improvement because there is a risk of discoloration, peeling, wrinkles, and the like.

  This invention is made | formed in view of such a situation, The objective is to improve the visibility and to provide the laminated foam container which comprises the external appearance which reminds of a texture.

(1) A laminated foam container according to the present invention is a laminated foam container having a synthetic resin container body in which a mouth part, a body part, and a bottom part are continuously arranged in this order from above to below, the container body Is formed of a colored layer formed of a first synthetic resin containing a colorant and a second synthetic resin containing a plurality of bubbles, and is disposed on the radially outer side of the container body with respect to the colored layer. A foam layer.

According to the laminated foam container of the present invention, the foamed layer containing a plurality of bubbles can be visually recognized with the colored layer as a back (background color). Therefore, the unevenness | corrugation shadow corresponding to the presence or absence of a bubble can be represented on the outer surface of a container main body with the color of a colored layer. Thereby, the external appearance which has a unique color tone and pattern can be provided. For example, it is possible to provide an appearance having a glittering or glossy effect (working) such as metallic tone, mirror tone, wood tone, and stone tone.
Therefore, it is possible to provide a container having an appearance that improves visuality and reminds of a texture. For example, it is possible to provide a container having a unique appearance that recalls a grainy texture such as granite, which is difficult to express by conventional decoration such as printing and labels.

(2) The foam layer may be an outer layer that forms the outer surface of the container body.

  In this case, since the foamed layer forms the outer surface of the container body, the irregularities of the foamed layer corresponding to the presence or absence of bubbles can be made to stand out, and the irregularities can be recognized by touching and acting on the sense of touch ( Can work). Therefore, both visual and tactile properties can be improved, and a container having an appearance having an actual texture can be obtained. Therefore, the container can have a more unique appearance.

(3) The colored layer may be formed thicker than the foamed layer.

  In this case, the colored layer can be darkly colored as the background color of the foam layer, and the shading of the irregularities corresponding to the presence or absence of bubbles on the outer surface of the container body can be more clearly represented. Furthermore, since the rigidity of the container body can be secured by forming the foam layer thick, for example, the foam layer can be formed thin accordingly. Therefore, it is possible to make it difficult to cause inconveniences such as, for example, bubbles overlapping and collapsing. By these things, it can be set as the container which has the external appearance which improves visuality further and is reminiscent of a texture.

(4) The colored layer may be formed in a color different from the foamed layer, and the second synthetic resin may be a synthetic resin that makes the colored layer visible through the foamed layer.

  In this case, a colored layer having a different color from the foamed layer can be used as a background color, and the colored layer can be appropriately visually recognized through the foamed layer, so that the outer surface of the container body has a variety of colors and patterns, and more It is easy to have an external appearance reminiscent of a more original texture.

(5) The container body may be formed of a resin including a polyethylene terephthalate resin, and may be disposed on the radially inner side of the container body with respect to the colored layer, and may include an inner layer that forms an inner surface of the container body. good.

  In this case, since the container main body is provided with the inner layer containing polyethylene terephthalate resin (PET resin), it can be set as a container which is hard to be influenced by the property of the content accommodated in a container main body. Therefore, the application range of the contents that can be accommodated can be expanded, and the container can be used for various purposes and has excellent convenience.

  According to the laminated foam container according to the present invention, it is possible to provide a container having an appearance that improves visuality and reminds of a texture, is excellent in design, and can be easily differentiated from other products. It can be.

1 is an external view showing an embodiment of a laminated foam container according to the present invention. It is a side view (partial sectional view) of the laminated foam container in a state where the cap shown in FIG. 1 is removed. It is an expanded sectional view of A part shown in FIG. It is an expanded sectional view of B section shown in FIG.

Hereinafter, an embodiment of a laminated foam container 1 according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the laminated foam container 1 of the present embodiment is a synthetic resin bottle, and includes a bottomed cylindrical container body 10 having a mouth part 2, a body part 3, and a bottom part 4. ing.

  The mouth part 2, the body part 3 and the bottom part 4 are connected in this order with their central axes positioned on the common axis. Hereinafter, this common axis is referred to as a container axis O, and the mouth 2 side is referred to as the upper side and the opposite side is referred to as the lower side along the container axis O direction. Further, in a plan view seen from the container axis O direction, a direction intersecting with the container axis O is referred to as a radial direction, and a direction rotating around the container axis O is referred to as a circumferential direction.

A screw portion 11 (for example, a female screw portion) is formed on the outer peripheral surface of the mouth portion 2 over the entire circumference in the circumferential direction. A neck ring 12 is formed at the lower end of the mouth 2 and protrudes radially outward and extends over the entire circumference.
A cap-shaped cap 13 shown in FIG. 1 is attached to the mouth portion 2 by being screwed onto the screw portion 11. However, the mounting method of the cap 13 is not limited to screwing, and may be mounted to the mouth portion 2 by, for example, undercut fitting. In addition, when attaching the cap 13 to the opening part 2 by undercut fitting, the cap 13 can also be used as a hinged cap, for example. In particular, when the cap 13 is attached to the mouth portion 2 by undercut fitting, the cap 13 can be easily opened and closed by using a hinged cap.

  The trunk | drum 3 is formed in the cylinder shape extended along the container axis | shaft O direction. In the illustrated example, the laminated foam container 1 is a round bottle in which the body portion 3 is formed in a cylindrical shape in cross section. Further, in the illustrated example, the trunk portion 3 has the same diameter from the bottom portion 4 to the central portion of the barrel portion 3 in the container axis O direction, and after being gradually reduced in diameter as it goes upward from the central portion, Furthermore, it is connected to the lower end part of the mouth part 2 by extending in a straight shape upward.

  However, the shape of the trunk portion 3 is not limited to this case, and may be appropriately changed according to, for example, the overall size, capacity, type of contents, use, etc. of the laminated foam container 1. For example, the laminated foam container 1 may be a square bottle in which the body 3 is formed in a polygonal shape in a cross-sectional view. Further, the body portion 3 may be formed to have the same diameter over the entire length in the container axis O direction, and may be formed to be continuous with the mouth portion 2 through the shoulder portion.

  The container body 10 has a laminated structure in which a plurality of layers are overlapped. Specifically, as shown in FIG. 3, the container body 10 includes an inner layer 20, a colored layer 21, a functional layer 22, and a foamed layer 23, and has a laminated structure in which these are laminated in order from the radially inner side.

The inner layer 20 is a synthetic resin layer that is disposed radially inward of the colored layer 21 and that forms the inner surface of the container body 10. The inner layer 20 is mainly formed of a resin containing polyethylene terephthalate resin (PET resin), and the film thickness thereof is, for example, about 30 μm. However, the film thickness of the inner layer 20 is an example, and may be changed as appropriate.
The inner layer 20 only needs to contain a PET resin, and may contain other synthetic resins or additives. In the present embodiment, the inner layer 20 is formed of a PET-G resin that is an amorphous resin. However, it is not limited to this case, and the inner layer 20 may be formed of other synthetic resins.

  The colored layer 21 is a synthetic resin layer that is disposed on the outer side in the radial direction than the inner layer 20 and overlaps in a state of being in close contact with the inner layer 20. The colored layer 21 is formed of a first synthetic resin containing a colorant, and has a film thickness of, for example, about 650 μm, and is the thickest layer among the layers constituting the container body 10. However, the film thickness of the colored layer 21 is an example, and may be changed as appropriate.

  In this embodiment, a polypropylene resin (PP resin) is used as the first synthetic resin. However, the present invention is not limited to this case, and other synthetic resins may be used as the first synthetic resin.

Although it does not specifically limit as a coloring agent, For example, the masterbatch which colors the 1st synthetic resin by knead | mixing in 1st synthetic resin is mentioned, for example. In the present embodiment, the colored layer 21 is colored black with a colorant.
The masterbatch is a pellet-like colorant in which a high-concentration pigment is kneaded. For example, the masterbatch is mixed in the first synthetic resin together with natural pellets, and the color density is arbitrarily adjusted according to the ratio of the two. Is possible. Thereby, the first synthetic resin can be appropriately adjusted to a desired color tone.

  The colorant is not limited to a master batch, and for example, colored pellets whose color density has been adjusted in advance may be used, or a liquid or gel paste color may be used. .

The functional layer 22 is a synthetic resin layer that is disposed on the outer side in the radial direction than the colored layer 21 and overlaps with the colored layer 21 in close contact therewith. The functional layer 22 is, for example, a resin having a barrier property that restricts transmission of gas (oxygen, carbon dioxide, etc.), moisture such as moisture, light such as ultraviolet rays, or odor components such as fragrance, and the like. It is formed of a resin that is appropriately selected according to the object.
For example, the functional layer 22 is formed of nylon resin or ethylene vinyl alcohol copolymer resin (EVOH) or the like when exhibiting a barrier property against gas, and cyclic polyolefin based when exhibiting a barrier property against moisture. It is made of resin or the like.
The film thickness of the functional layer 22 is about 10 μm, for example. However, the film thickness of the functional layer 22 is an example, and may be changed as appropriate.

The foam layer 23 is a synthetic resin layer that is disposed on the outer side in the radial direction from the functional layer 22 and overlaps with the functional layer 22 in close contact. The foam layer 23 is an outer layer that is disposed on the radially outer side of the colored layer 21 and forms the outer surface of the container body 10.
The foam layer 23 is formed of a second synthetic resin including a plurality of bubbles 24, and has a film thickness of, for example, about 100 μm and is thinner than the colored layer 21. However, the film thickness of the foam layer 23 is an example, and may be changed as appropriate.

In this embodiment, a primary color polypropylene resin (PP resin) is used as the second synthetic resin. Thereby, the colored layer 21 can be visually recognized through the foamed layer 23 from the outside of the container body 10.
However, it is not limited to the primary color PP resin, and a PP resin colored in a color other than the primary color may be used. Even in this case, it is preferable to adjust the transmittance of the PP resin so that the colored layer 21 can be visually recognized through the foam layer 23. Furthermore, it is not limited to PP resin, You may use another synthetic resin as 2nd synthetic resin.

  Furthermore, in the present embodiment, a plurality of fine foaming agents that thermally expand are mixed in the second synthetic resin, which is a primary color PP resin, and the plurality of foaming agents are thermally expanded, whereby the front and back surfaces of the foam layer 23 and Bubbles 24 are present throughout the interior including the inside.

  The foaming agent is a microcapsule having a diameter of several μm to several tens of μm, for example, in which liquid hydrocarbons are wrapped in a thermoplastic polymer shell (shell), and the polymer shell is softened by heating. Hydrocarbons change from liquid to gas. Thereby, the bubble 24 can be generated in a state of being encapsulated by the polymer shell by the thermal expansion of the microcapsule by heating. In each drawing, the foaming agent itself is not shown.

  The container body 10 configured as described above is formed, for example, by extrusion blow molding using a parison. The foaming agent thermally expands in the second synthetic resin during blow molding. Thereby, the foamed layer 23 can be formed by the second synthetic resin including the plurality of bubbles 24.

Furthermore, in this embodiment, in order to improve the adhesion between the inner layer 20, the colored layer 21, the functional layer 22, and the foamed layer 23, an adhesive layer (not shown) is interposed between the respective layers.
The adhesive layer is not particularly limited, and may be appropriately selected according to the type of synthetic resin in each layer. The thickness of the adhesive layer is, for example, about 10 μm, but is not particularly limited.

Further, as shown in FIG. 4, in the mouth portion 2 of the container body 10, the foam layer 23 is not folded back inward in the radial direction so as to cover the functional layer 22, the colored layer 21, and the inner layer 20 from above, for example. Is formed. Thereby, the inner layer 20, the colored layer 21, and the functional layer 22 are exposed at the upper end opening edge of the mouth portion 2, respectively. In particular, since the thickest colored layer 21 is exposed, the surface smoothness of the colored layer 21 can ensure a certain flatness without forming irregularities on the upper end opening edge of the mouth portion 2. .
Similarly, the inner surface of the mouth portion 2 is formed only by the inner layer 20 without the foamed layer 23 being folded back, and therefore the inner surface of the inner layer 20 is constant without forming irregularities on the inner surface of the mouth portion 2. Can be ensured.

(Operation of laminated foam container)
According to the laminated foam container 1 configured as described above, the foamed layer 23 containing a plurality of bubbles 24 can be visually recognized with the colored layer 21 as a background (background color). As shown in FIG. 1, an uneven shadow corresponding to the presence or absence of bubbles 24 can be expressed on the outer surface of the foam layer 23, that is, the outer surface of the container body 10, in combination with the color of the colored layer 21. Thereby, the external appearance which has a unique color tone and a pattern can be provided, and the external appearance which acts on vision and has a lustrous feeling or a glossy feeling can be provided. Therefore, it can be set as the laminated foam container 1 which has the unique external appearance which reminds of the texture of the grain texture, such as granite, for example.

  Furthermore, since the foam layer 23 itself is an outer layer that forms the outer surface of the container body 10, the irregularities of the foam layer 23 corresponding to the presence or absence of the bubbles 24 can be made to stand out, and the irregularities can be recognized by touching the irregularities. Can also act. Therefore, both visual and tactile properties can be improved, and a container having an appearance that actually has a texture can be obtained. As described above, for example, it is expressed by decoration such as conventional printing and labels. The laminated foam container 1 having a grainy texture such as granite is difficult.

  As described above, according to the laminated foam container 1 of the present embodiment, it is possible to provide a container having a unique appearance that improves the visual and tactile properties and has a texture, and is excellent in design. The container can be easily differentiated from other products.

Furthermore, since the colored layer 21 is formed thicker than the foamed layer 23, the colored layer 21 can be darkly colored as the background color of the foamed layer 23, and the presence or absence of bubbles 24 on the outer surface of the container body 10 The shading of the unevenness corresponding to can be expressed more clearly.
In particular, since the foam layer 23 is formed of the primary color PP resin as the second synthetic resin, the colored layer 21 is easily visible through the foam layer 23 from the outside of the container body 10. Therefore, it is possible to further provide a unique appearance that reminds of a grainy texture such as granite, using the colored layer 21 that is darkly colored as a background color.

  Further, by forming the foam layer 23 thick, for example, the rigidity of the container body 10 can be ensured, so that the foam layer 23 can be formed thin accordingly. Accordingly, it is possible to make it difficult to cause inconveniences such as, for example, the bubbles 24 overlapping and collapsing. By these things, it can be set as the laminated foam container 1 which further improves visual property and tactile property, and has the external appearance which has a further texture.

  Furthermore, since the container body 10 has an inner layer 20 formed of a resin containing a PET resin, specifically, a PET-G resin, a laminated foam container that is not easily affected by the properties of the contents accommodated in the container body 10. 1 can be used. For example, since it is possible to effectively suppress the components of the contents from adsorbing to the inner layer 20, the container can be made less susceptible to the properties of the contents. Therefore, the applicable range of the contents which can be accommodated can be expanded, and the laminated foam container 1 excellent in convenience that can be used for various purposes can be obtained.

  Further, as shown in FIG. 4, the colored layer 21 is exposed at the upper end opening edge of the mouth portion 2, and the flatness of the upper end opening edge of the mouth portion 2 can be secured by the surface smoothness of the colored layer 21. . Therefore, the sealing performance of the mouth portion 2 can be ensured by the cap 13 attached to the mouth portion 2 of the container body 10. Furthermore, the inner surface of the mouth portion 2 is formed only by the inner layer 20, and the flatness of the inner surface of the mouth portion 2 can be ensured by the surface smoothness of the inner layer 20. Therefore, it is possible to further secure the sealing performance of the mouth portion 2 by, for example, forming a seal tube closely fitting inside the mouth portion 2 of the container body 10 in the cap 13.

  In addition, you may form in the upper end opening edge of the opening | mouth part 2 of the container main body 10 so that the inner layer 20 may be folded back on the radial direction outer side so that the colored layer 21, the functional layer 22, and the foaming layer 23 may be covered from upper direction, for example. In this case, using the surface smoothness of the inner layer 20, it is possible to ensure a certain flatness on both the inner surface of the mouth portion 2 and the upper end opening edge of the mouth portion 2. Therefore, the sealing property with the cap 13 described above can be ensured.

  As mentioned above, although embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. The embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. Embodiments and modifications thereof include, for example, those that can be easily assumed by those skilled in the art, substantially the same, and equivalents.

  For example, in the above-described embodiment, the laminated foam container 1 is not limited to being used as a food container. For example, a cosmetic container for storing cosmetics such as cream to be applied to the skin, or a pharmaceutical for storing chemicals or the like. It may be used as a container for use.

Furthermore, in the said embodiment, although the foaming layer 23 was formed with the foaming agent using a microcapsule, it is not limited to this case, The foaming agent using other than a microcapsule, for example, the foaming agent using a chemical reaction, is used. You may adopt.
Furthermore, the present invention is not limited to the case of using a foaming agent, and other configurations may be adopted as long as the foamed layer 23 including a plurality of bubbles 24 can be formed. The foam layer 23 is a layer in which bubbles 24 appear on the surface.
In addition, when utilizing a foaming agent, as a ratio of the mass of a foaming agent with respect to the mass of 2nd synthetic resin, it is 3%, for example, according to the desired external appearance, the range of 1-5%, More preferably, it is 1.5. You may change suitably in the range of% -4%.

  In the above embodiment, as shown in FIG. 1, the laminated foam container 1 has an appearance having a grainy texture such as granite, but the color tone of the colored layer 21 and the degree of the bubbles 24 in the foamed layer 23. Depending on the density, etc., other appearance can be provided. For example, it can be set as the laminated foam container 1 which has the external appearance which recalls textures, such as a metallic tone, a pearl tone, a mirror tone, a wood grain tone, a suede tone, and a Japanese paper tone.

  Further, in the above embodiment, the foam layer 23 is formed using the primary color PP resin. However, the foam layer 23 itself may be colored according to the required texture, for example. In this case, the color of the foam layer 23 may be the same color as the color of the colored layer 21 or may be a different color. However, in any case, it is preferable that the colored layer 21 is visible from the outside of the container body 10 through the foam layer 23.

Furthermore, in the said embodiment, although the foaming layer 23 was made into the outer layer which forms the outer surface of the container main body 10, it does not need to be an outer layer. For example, a clear layer made of a synthetic resin that is transparent or translucent may be arranged on the outer side in the radial direction from the foam layer 23, and the clear layer may be used as the outer layer. This clear layer can be used, for example, as a layer for recalling the desired texture.
The clear layer may be formed by lamination by extrusion blow molding, or may be formed by painting or the like.

Further, in the above embodiment, an adhesive layer (not shown) is interposed between the respective layers of the inner layer 20, the colored layer 21, the functional layer 22, and the foamed layer 23, but the adhesive layer is essential. However, it does not have to be provided.
In this case, for example, the inner layer 20 may be reduced in volume as the contents are reduced, and may be used as a layer that is detachably laminated on the inner surface of the colored layer 21. When the inner layer 20 is configured in this way, the container body 10 can be used as a delamination container (delami bottle).

DESCRIPTION OF SYMBOLS 1 ... Laminated foam container 2 ... Mouth part 3 ... Trunk part 4 ... Bottom part 10 ... Container main body 20 ... Inner layer 21 ... Colored layer 23 ... Foamed layer 24 ... Bubble

Claims (5)

A laminated foam container having a container body made of a synthetic resin in which a mouth part, a body part, and a bottom part are continuously arranged in this order from above to below,
The container body is
A colored layer formed of a first synthetic resin containing a colorant;
A laminated foam container, comprising: a foam layer formed of a second synthetic resin containing a plurality of bubbles, and disposed on a radially outer side of the container body than the colored layer. In the laminated foam container according to claim 1,
The said foaming layer is a laminated foam container which is an outer layer which forms the outer surface of the said container main body. In the laminated foam container according to claim 1 or 2,
The colored foam layer is a laminated foam container formed thicker than the foam layer. In the lamination foam container according to any one of claims 1 to 3,
The colored layer is formed in a color different from the foamed layer,
The laminated foam container, wherein the second synthetic resin is a synthetic resin that makes the colored layer visible through the foam layer. In the lamination foam container according to any one of claims 1 to 4,
The container body is formed of a resin containing polyethylene terephthalate resin, and is disposed on the radially inner side of the container body with respect to the colored layer, and includes an inner layer that forms an inner surface of the container body. container.