JP2021123370A - Resin container, resin container with lid material, composite container, and composite container with lid material - Google Patents

Abstract

To provide a resin container, a resin container with a lid material, a composite container and a composite container with a lid material, which reduce a used amount of a resin, suppress deterioration in moldability, and can suppress deformation of a flange part.SOLUTION: A resin container 10 includes a bottom part 30, a body part 20, and a flange part 40 connected to the body part 20. The body part 20 has a thick wall part 22 connected to the flange part 40, a thickness-reduced part 23 positioned on the side of the bottom part 30 rather than the thick wall part 22, and a thin wall part 24 positioned on the side of the bottom part 30 rather than the thickness-reduced part 23. Thickness T3 of the flange part 40 is thicker than thickness T11 of the thick wall part 22. Thickness T11 of the thick wall part 22 is thicker than thickness T12 of the thin wall part 24. Thickness of the thickness-reduced part 23 is gradually thinner toward the side of the bottom part 30 from the side of the flange part 40. Height H1 of the thick wall part 22 is 10 mm or more and 30 mm or less.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a resin container, a resin container with a lid material, a composite container, and a composite container with a lid material.

Conventionally, a container manufactured by sheet molding, injection molding, or the like has been known as a container for containing contents such as food and sealed by a lid material (for example, Patent Documents 1 and 2). Patent Document 1 discloses a food sheet molding container having a high heat insulating property. Further, Patent Document 2 discloses an injection-molded product made of a polyester resin and having good moldability.

Japanese Unexamined Patent Publication No. 2013-245021 Japanese Unexamined Patent Publication No. 2000-141397

On the other hand, for the purpose of reducing the environmental load, it is required to reduce the amount of resin used in the resin container. In recent years, due to problems such as marine pollution, strict attention has been paid to such resin containers, and beverage manufacturers, restaurants, etc. have reduced the number of straws for beverage cups or changed the material. It is also being promoted.

However, in a container manufactured by sheet molding, although the body portion can be thinned due to the characteristics of sheet molding, it is difficult to reduce the wall thickness of the flange. Therefore, it is difficult to reduce the amount of resin used. Further, in a container manufactured by injection molding, when the thickness of the body and bottom is reduced, the thickness of the flange is also reduced according to the thickness of the body and bottom due to the characteristics of injection molding. As a result, the flange portion may be easily deformed. In this case, the sealing property of the lid material with respect to the flange portion and the opening property of the lid material may be deteriorated.

The present disclosure has been made in consideration of such a point, and is a resin capable of reducing the amount of resin used, suppressing deterioration of moldability, and suppressing deformation of the flange portion. An object of the present invention is to provide a container, a resin container with a lid, a composite container, and a composite container with a lid.

The resin container according to one embodiment is a cup-shaped resin container, which includes a bottom portion, a body portion, and a flange portion connected to the body portion, and the body portion is connected to the flange portion. It has a thickened portion, a thinned portion located on the bottom side of the thickened portion, and a thinned portion located on the bottom side of the thinned portion, and the thickness of the flange portion is determined. The thickness of the thick portion is thicker than the thickness of the thick portion, the thickness of the thick portion is thicker than the thickness of the thin portion, and the thickness of the thinned portion gradually decreases from the flange portion side to the bottom portion side. The thick portion is a resin container having a height of 10 mm or more and 30 mm or less.

In the resin container according to the embodiment, a regulating portion that regulates the sticking of the resin containers to each other when the resin containers are stacked may be formed on the thick portion.

The resin container according to one embodiment is a cup-shaped resin container, which includes a bottom portion, a body portion, and a flange portion connected to the body portion, and the body portion is connected to the flange portion. It has a thickened portion, a thinned portion located on the bottom side of the thickened portion, and a thinned portion located on the bottom side of the thinned portion, and the thickness of the flange portion is determined. The thickness of the thick portion is thicker than the thickness of the thick portion, the thickness of the thick portion is thicker than the thickness of the thin portion, and the thickness of the thinned portion gradually decreases from the flange portion side to the bottom portion side. This is a resin container in which a regulating portion for restricting the sticking of the resin containers to each other when the resin containers are stacked on the thick portion is formed.

In the resin container according to one embodiment, the thickness of the thick portion is 0.5 mm or more and 1.5 mm or less, the thickness of the thin portion is 0.1 mm or more and 0.4 mm or less, and the flange portion. The thickness of the above may be 1.0 mm or more and 3.0 mm or less.

In the resin container according to the embodiment, the wall thinning portion may be thinned from the inside of the resin container.

In the resin container according to the embodiment, the wall thinning portion may be thinned from the outside of the resin container.

In the resin container according to the embodiment, the wall thinning portion may be thinned from both the inside and the outside of the resin container.

In the resin container according to the embodiment, the resin container may be manufactured by compression blow molding.

In the resin container according to the embodiment, the gate mark may not be present on the bottom surface of the bottom portion.

In the resin container according to the embodiment, the resin container may be manufactured by injection blow molding.

The resin container with a lid material according to one embodiment is a resin container with a lid material provided with the resin container according to the present disclosure and a lid material for sealing the resin container.

The composite container according to one embodiment is a composite container including the resin container according to the present disclosure and a reinforcing member that covers at least a part of the body of the resin container.

The composite container with a lid material according to one embodiment is a composite container with a lid material including the composite container according to the present disclosure and a lid material for sealing the composite container.

According to the present disclosure, it is possible to reduce the amount of resin used, suppress the deterioration of moldability, and suppress the deformation of the flange portion.

FIG. 1 is a partial vertical sectional view showing a container with a lid according to the present embodiment. FIG. 2 is a cross-sectional view (enlarged view corresponding to Part II of FIG. 1) showing a resin container according to the present embodiment. FIG. 3 is a plan view showing a resin container according to the present embodiment. FIG. 4 is a developed view showing a sleeve of a composite container according to the present embodiment. FIG. 5 is a side sectional view showing an example of a laminated body constituting the lid material of the container with a lid material according to the present embodiment. FIG. 6 is a partial vertical sectional view showing a preform for producing a resin container according to the present embodiment. 7 (a)-(c) are cross-sectional views showing a method of manufacturing a resin container according to the present embodiment. 8 (a)-(b) are cross-sectional views showing a method of manufacturing a resin container according to the present embodiment. 9 (a)-(b) are cross-sectional views showing a method of manufacturing a resin container according to the present embodiment. FIG. 10A is a cross-sectional view showing a method of manufacturing a composite container according to the present embodiment, and FIG. 10B is a cross-sectional view showing a method of manufacturing a container with a lid according to the present embodiment. FIG. 11 is a partial vertical cross-sectional view showing a modified example of the container with a lid according to the present embodiment. FIG. 12 is a cross-sectional view showing a first modification of the resin container according to the present embodiment, and is a cross-sectional view corresponding to FIG. FIG. 13 is a cross-sectional view showing a second modification of the resin container according to the present embodiment, and is a cross-sectional view corresponding to FIG. FIG. 14 is a partial vertical sectional view showing a third modification of the resin container according to the present embodiment. FIG. 15 is a vertical cross-sectional view showing a third modification of the resin container according to the present embodiment. FIG. 16 is a partial vertical sectional view showing a preform for producing a third modification of the resin container according to the present embodiment. 17 (a)-(b) are cross-sectional views showing a manufacturing method of a third modification of the resin container according to the present embodiment.

Hereinafter, the present embodiment will be described with reference to the drawings. 1 to 10 are diagrams showing the present embodiment. Each figure shown below is schematically shown. Therefore, the size and shape of each part are exaggerated as appropriate to facilitate understanding. In addition, it is possible to change and implement as appropriate within the range that does not deviate from the technical idea. In each of the figures shown below, the same parts are designated by the same reference numerals, and some detailed description thereof may be omitted. Further, numerical values such as dimensions of each member and material names described in the present specification are examples of embodiments, and are not limited to these, and can be appropriately selected and used. In the present specification, terms that specify a shape or a geometric condition, such as parallel, orthogonal, and vertical, are intended to include substantially the same state in addition to the exact meaning. In addition, in this specification, "upper" and "lower" mean the upper part and the lower part in the state (FIG. 1) in which the container 1 with a lid material is upright, respectively.

Container with lid material As shown in FIG. 1, the container with a lid material (composite container with a lid material) 1 includes a composite container 10A and a lid material 50 for sealing the composite container 10A. Here, first, the composite container 10A will be described.

(Composite container)
As shown in FIG. 1, the composite container 10A includes a cup-shaped resin container 10 and a sleeve (reinforcing member) 60 provided on the outside of the resin container 10. Of these, the resin container 10 is manufactured by compression blow molding, as will be described later. The contents contained in the resin container 10 are not particularly limited, and may be beverages, desserts, or the like.

The resin container 10 includes a body portion 20, a bottom portion 30 connected to the body portion 20, and a flange portion 40 connected to the body portion 20. Of these, the body portion 20 and the bottom portion 30 are thinner than the flange portion 40 because they are stretched during blow molding, which will be described later. An opening 40A is formed in such a resin container 10, and the contents filled in the composite container 10A are filled from the opening 40A, and the contents filled in the composite container 10A are taken out from the opening 40A. It is designed to be used.

The body portion 20 of the resin container 10 has an inverted truncated cone shape in which the diameter is gradually reduced from the upper side (flange portion 40 side) to the lower portion (bottom portion 30 side). However, the present invention is not limited to this, and the body portion 20 may have a substantially cylindrical shape, or the body portion 20 has a polygonal pyramid shape such as an inverted quadrangular pyramid shape or an inverted octagonal frustum shape. You may be doing it. Further, in the present embodiment, the outer surface 201 of the body portion 20 is formed in a straight line with no unevenness or the like formed in the vertical cross section.

The body portion 20 includes a thick-walled portion 22 connected to the flange portion 40, a thin-walled portion 23 located on the bottom 30 side of the thick-walled portion 22, and a thin-walled portion located on the bottom 30 side of the thick-walled portion 23. It has 24 and.

Of these, the thick portion 22 has a substantially uniform thickness as a whole. The thickness T11 of the thick portion 22 is thicker than the thickness T12 of the thin portion 24. As a result, the rigidity in the vicinity of the flange portion 40 can be increased. Therefore, it is possible to prevent the flange portion 40 from being deformed when the user grips the resin container 10.

The thickness T11 (see FIG. 2) of the thick portion 22 is preferably 0.5 mm or more and 1.5 mm or less, and may be 1.0 mm as an example. When the thickness T11 of the thick portion 22 is 0.5 mm or more, the rigidity of the thick portion 22 can be kept high. By keeping the rigidity of the thick portion 22 high in this way, it is possible to prevent the flange portion 40 connected to the thick portion 22 from being deformed when the user grips the resin container 10. .. Further, when the thickness T11 of the thick portion 22 is 1.5 mm or less, the weight of the resin container 10 can be reduced and the amount of resin used can be reduced. In the present specification, the thickness T11 of the thick portion 22 is measured in a direction perpendicular to the surfaces of the body portion 20 (outer surface 201 and inner surface 202) at five points different from each other in the thick portion 22. The average value of the thickness. Further, the thickness T11 of the thick portion 22 can be measured using a micrometer (for example, BMD-25MX395-271 manufactured by Mitutoyo Co., Ltd.).

Further, the height of the thick portion 22 (distance in the vertical direction from the lower surface of the flange portion 40) H1 (see FIG. 2) is preferably 10 mm or more and 30 mm or less. When the height H1 of the thick portion 22 is 10 mm or more, the rigidity in the vicinity of the flange portion 40 can be effectively increased. Therefore, it is possible to prevent the flange portion 40 from being deformed when the user grips the resin container 10. Further, since the height H1 of the thick portion 22 is 30 mm or less, the proportion of the thin portion 24 in the body portion 20 can be increased. Therefore, the amount of resin used can be reduced.

The wall thinning portion 23 is located between the thick wall portion 22 and the thin wall portion 24 in the vertical direction. The thickness of the thinned portion 23 gradually decreases from the upper side (flange portion 40 side) to the lower side (bottom portion 30 side). In this way, the moldability of the body portion 20 can be improved by providing the wall-reducing portion 23 whose thickness gradually decreases between the thick-walled portion 22 and the thin-walled portion 24.

In the present embodiment, the wall thinning portion 23 is thinned from the inside of the resin container 10. That is, when the virtual line X1 extending from the inner surface 202 of the body portion 20 of the thick portion 22 and the virtual line X1 extending parallel to the inner surface 202 of the body portion 20 of the thick wall portion 22 is provided, the wall thickness portion 23 The inner surface 202 of the body portion 20 is recessed radially outward with respect to the virtual line X1. In this way, when the wall thinning portion 23 is thinned from the inside of the resin container 10, even when the wall thinning portion 23 is provided between the thick wall portion 22 and the thin wall portion 24, the body portion The outer surface 201 of 20 can be formed in a straight line with no unevenness or the like formed in the vertical cross section. Therefore, for example, when the sleeve 60 is attached to the body portion 20 of the resin container 10 with an adhesive, the area where the sleeve 60 contacts the body portion 20 of the resin container 10 can be increased, and the sleeve 60 can be formed. Can be easily installed. Further, in the illustrated example, in the wall thinning portion 23, the inner surface 202 of the body portion 20 is inclined downward in the radial direction outward.

The height (vertical distance) H2 (see FIG. 2) of the thinned portion 23 is preferably 10 mm or more and 30 mm or less. When the height H2 of the thinned portion 23 is 10 mm or more, the moldability of the body portion 20 can be improved. Further, when the height H2 of the thinned portion 23 is 30 mm or less, the proportion of the thin portion 24 in the body portion 20 can be increased, and the amount of resin used can be reduced.

The thin portion 24 of the body portion 20 is a portion thinner than the thick portion 22, and has a substantially uniform thickness as a whole. The thickness T12 (see FIG. 1) of the thin portion 24 is 0.1 mm or more and 0.4 mm or less, and may be 0.2 mm as an example. When the thickness T12 of the thin portion 24 is 0.1 mm or more, it is possible to suppress the deterioration of the moldability of the resin container 10. Further, when the thickness T12 of the thin-walled portion 24 is 0.4 mm or less, the weight of the resin container 10 can be reduced and the amount of resin used can be reduced. In the present specification, the thickness T12 of the thin portion 24 is different from the thickness T12 of the thin portion 24 at five points different from each other in the region located at the center in the height direction when the body portion 20 is divided into three equal parts in the height direction. It refers to the average value of the thickness measured in the direction perpendicular to the 20 surfaces (outer surface 201 and inner surface 202). Further, the thickness T12 of the thin portion 24 can be measured using a micrometer (for example, BMD-25MX395-271 manufactured by Mitutoyo Co., Ltd.). Further, in the present specification, the "thickness of the body portion" means the thickness T12 of the thin portion 24 of the body portion 20.

Next, the bottom portion 30 will be described. As shown in FIG. 3, the bottom portion 30 has a substantially circular shape in a plan view. The diameter of the bottom portion 30 may be, for example, 40 mm or more and 70 mm or less. Further, as shown in FIG. 1, the bottom portion 30 has a recess 32 located at the center and a ground contact portion 33 provided around the recess 32. The bottom portion 30 does not have the recess 32 and the ground contact portion 33, and the bottom surface 31 of the bottom portion 30 may be a flat surface. Further, although not shown, the bottom portion 30 may be formed with irregularities such as reinforcing ribs that suppress deformation of the bottom portion 30.

The thickness T2 of the bottom portion 30 (see FIG. 1) is preferably 0.2 mm or more and 0.7 mm or less, and may be 0.4 mm as an example. When the thickness T2 of the bottom portion 30 is 0.2 mm or more, it is possible to suppress a decrease in the moldability of the resin container 10 and a decrease in the rigidity of the bottom portion 30. Further, when the thickness T2 of the bottom portion 30 is 0.7 mm or less, the weight of the resin container 10 can be reduced and the amount of resin used can be reduced. In the present specification, the thickness T2 of the bottom portion 30 is an average value of the thicknesses measured in a direction perpendicular to the bottom surface 31 at five different points in a region within 35 mm in diameter from the center of the bottom portion 30. To say. At this time, when irregularities such as reinforcing ribs are formed in a region within 35 mm in diameter from the center of the bottom portion 30, each point to be measured selects a point located in the region where the irregularities are not formed. Further, the thickness T2 of the bottom portion 30 can be measured using a micrometer (for example, BMD-25MX395-271 manufactured by Mitutoyo Co., Ltd.).

Further, there is no gate mark on the bottom surface 31 of the bottom portion 30. That is, the resin container 10 according to the present embodiment is manufactured by compression blow molding as described above. Therefore, the bottom surface 31 of the bottom portion 30 of the resin container 10 does not have a gate mark formed on a resin product produced by, for example, injection molding or injection blow molding. As a result, when the resin container 10 is dropped, it is possible to prevent the bottom 30 of the resin container 10 from being damaged due to the gate mark, that is, so-called gate cracking. Therefore, the drop strength at the bottom 30 of the resin container 10 can be improved. Further, since there is no gate mark on the bottom surface 31 of the bottom portion 30, there is no restriction on the printing position when printing characters or the like on the bottom portion 30. In the present specification, the term "gate mark" means that when a resin product is produced by injection molding using a male mold and a female mold, a resin material is injected into the space between the male mold and the female mold. It means traces such as unevenness formed on the resin product due to the gate for the resin product.

Next, the flange portion 40 will be described. As shown in FIG. 3, the flange portion 40 has a substantially annular shape in a plan view. As shown in FIGS. 1 and 2, the flange portion 40 projects horizontally from the upper end of the body portion 20 toward the side, and the upper surface of the flange portion 40 is a flat surface. Further, the above-mentioned opening 40A is formed inside the flange portion 40.

The flange portion 40 is a portion that is not stretched during blow molding, which will be described later. The flange portion 40 has rigidity so that it will not be easily deformed when the user holds the composite container 10A. Further, since the flange portion 40 is a portion that is not stretched during blow molding, which will be described later, the thickness T3 of the flange portion 40 is thicker than the thickness T12 of the thin portion 24 of the body portion 20. As a result, even when the amount of resin used is reduced by reducing the thickness T12 of the thin-walled portion 24, it is possible to suppress the decrease in the rigidity of the flange portion 40. Therefore, when the lid material 50 is sealed to the flange portion 40, it is possible to suppress the occurrence of a sealing defect, and it is possible to suppress the deterioration of the opening property of the lid material 50. The thickness T3 of the flange portion 40 may be 4 times or more and 30 times or less the thickness T12 of the thin-walled portion 24.

Further, the thickness T3 of the flange portion 40 (see FIG. 2) is thicker than the thickness T11 of the thick portion 22 of the body portion 20. As a result, it is possible to suppress a decrease in the rigidity of the flange portion 40.

In the present embodiment, the thickness T3 of the flange portion 40 is 1.0 mm or more and 3.0 mm or less, preferably 1.0 mm or more and 2.5 mm or less, and more preferably 1.0 mm or more and 2.0 mm or less. As an example, it may be 1.5 mm. When the thickness T3 of the flange portion 40 is 1.0 mm or more, it is possible to suppress the deterioration of the mouthfeel with respect to the flange portion 40. Further, when the thickness T3 of the flange portion 40 is 1.0 mm or more, it is possible to suppress a decrease in the moldability of the resin container 10 and to suppress a decrease in the rigidity of the flange portion 40. Can be done. In this case, since it is possible to suppress the decrease in the rigidity of the flange portion 40, it is possible to suppress the deformation of the flange portion 40. Thereby, when the lid material 50 is sealed to the flange portion 40, it is possible to suppress the occurrence of a sealing defect. Therefore, it is possible to prevent the drop strength of the lid material 50 sealed on the flange portion 40 from being lowered due to the deformation of the flange portion 40. Further, since it is possible to suppress the decrease in the rigidity of the flange portion 40, it is possible to suppress the decrease in the openability of the lid material 50 when the lid material 50 is opened from the flange portion 40. Further, when the thickness T3 of the flange portion 40 is 3.0 mm or less, the amount of resin used can be reduced. In this specification, the average value of the thicknesses (the vertical distance from the upper straight portion 42 to the lower straight portion 45, which will be described later) is measured at five points different from the thickness T3 of the flange portion 40. say. Further, the thickness T3 of the flange portion 40 can be measured using a micrometer (for example, BMD-25MX395-271 manufactured by Mitutoyo Co., Ltd.).

Next, the flange portion 40 will be described in more detail with reference to FIG. As shown in FIG. 2, in the vertical cross section, the flange portion 40 is connected to the upper straight portion 42 and the upper straight portion 42, and has an upper bending portion 43 located radially outward of the upper straight portion 42 and an upper bending portion 43. It has a lower curved portion 44 located below the portion 43 and a lower straight portion 45 connected to the lower curved portion 44 and located inward in the radial direction of the lower curved portion 44.

Of these, the upper straight portion 42 constitutes the upper surface of the flange portion 40 and extends in the horizontal direction. The width (radial distance) W1 of the upper straight portion 42 is preferably 2.0 mm or more and 4.0 mm or less. When the width W1 of the upper straight portion 42 is 2.0 mm or more, the sealing region when the lid material 50 is sealed to the flange portion 40 can be widened. Therefore, when the lid material 50 is sealed to the flange portion 40, it is possible to suppress the occurrence of a sealing defect. Further, since the width W1 of the upper straight portion 42 is 4.0 mm or less, it is possible to prevent the contents from spilling from the side of the mouth when the contents are drunk with the flange portion 40 attached to the mouth. It is possible to prevent the contents from becoming difficult to drink.

Further, the outer diameter R1 of the upper straight portion 42 is larger than the outer diameter R2 of the lower straight portion 45. As a result, when the user's upper lip is attached to the flange portion 40 and drinks the contents, the user's upper lip can easily come into contact with the contents existing on the flange portion 40. Therefore, it is possible to prevent the contents existing on the flange portion 40 from spilling from the flange portion 40. As a result, when the flange portion 40 is attached to the mouth to drink the contents, the contents can be easily drunk. Further, since the outer diameter R1 of the upper straight portion 42 is larger than the outer diameter R2 of the lower straight portion 45, the upper lip of the user can easily come into contact with the upper straight portion 42, and the user can easily contact the flange portion 40. You can make it easier to inhale the above contents. Therefore, after the user drinks the contents, the residue of the contents existing on the flange portion 40 can be reduced. As a result, it is possible to prevent the contents existing on the flange portion 40 from spilling from the flange portion 40, that is, so-called dripping.

The outer diameter R1 of the upper straight portion 42 can be appropriately set depending on the full filling capacity of the resin container 10. However, in the case of the resin container 10 having a full filling capacity of 100 ml or more and 500 ml or less, the outer diameter R1 of the upper straight portion 42 is outside the upper straight portion 42. The diameter R1 is preferably 60 mm or more and 100 mm or less, and may be 74 mm as an example.

The upper curved portion 43 is curved so as to be convex upward and outward in the radial direction. The radius of curvature r1 of the upper curved portion 43 is preferably 0.3 mm or more and 1.0 mm or less, and may be 0.5 mm as an example. When the radius of curvature r1 of the upper curved portion 43 is 0.3 mm or more, the mouthfeel with respect to the flange portion 40 can be improved. Further, since the radius of curvature r1 of the upper curved portion 43 is 1.0 mm or less, the residue of the contents existing on the flange portion 40 spills from the flange portion 40 after the user drinks the contents. It is possible to suppress the occurrence of so-called dripping.

An outer straight portion 47 forming an outer surface of the flange portion 40 is connected to such an upper curved portion 43. The outer straight portion 47 extends in the vertical direction. Further, a lower curved portion 44 is connected to the outer straight portion 47. Although not shown, the lower curved portion 44 may be directly connected to the upper curved portion 43.

The lower curved portion 44 is curved so as to be convex downward and outward in the radial direction. The radius of curvature r2 of the lower curved portion 44 is equal to or greater than the radius of curvature r1 of the upper curved portion 43. Thereby, the mouthfeel with respect to the flange portion 40 can be improved. That is, the lower curved portion 44 of the flange portion 40 is a portion where the lower lip of the user first comes into contact with the flange portion 40 when the user puts his / her mouth on the flange portion 40 and drinks the contents. Therefore, by setting the radius of curvature r2 of the lower curved portion 44 that first abuts on the lower lip of the user to be equal to or greater than the radius of curvature r1 of the upper curved portion 43, the user feels uncomfortable when he / she puts his / her mouth on the flange portion 40. Can be reduced. Therefore, when the flange portion 40 is attached to the mouth to drink the contents, the contents can be easily drunk.

The radius of curvature r2 of the lower curved portion 44 is preferably 0.5 mm or more and 1.5 mm or less, and may be 1.0 mm as an example. When the radius of curvature r2 of the lower curved portion 44 is 0.5 mm or more, the mouthfeel with respect to the flange portion 40 can be improved. Further, when the radius of curvature r2 of the lower curved portion 44 is 1.5 mm or less, it is possible to prevent the width of the lower straight portion 45 from becoming too narrow.

The lower straight portion 45 constitutes the lower surface of the flange portion 40 and extends in the horizontal direction. The width (radial distance) W2 of the lower straight portion 45 is preferably 2.0 mm or more and 4.0 mm or less. When the width W2 of the lower straight portion 45 is 2.0 mm or more, the region where the lower straight portion 45 and the upper straight portion 42 overlap in the vertical direction can be widened. By the way, when the lid material 50 is sealed to the flange portion 40, for example, with the flange portion 40 and the lid material 50 sandwiched from above and below by a sealing hot plate or the like (not shown), the heat from the sealing hot plate is applied to the flange portion 40 and the flange portion 40. It is transmitted to the lid material 50. Here, in the region where the lower straight portion 45 and the upper straight portion 42 overlap in the vertical direction, the flange portion 40 is deformed when the flange portion 40 and the lid member 50 are sandwiched from the vertical direction by a sealing hot plate or the like. Can be suppressed. Therefore, in this region, the heat from the sealing hot plate can be effectively transferred to the flange portion 40 and the lid material 50, and when the lid material 50 is sealed to the flange portion 40, a sealing defect occurs. Can be suppressed. Further, since the width W2 of the lower straight portion 45 is 4.0 mm or less, it is possible to reduce the discomfort when the user attaches the mouth to the flange portion 40, and the contents can be opened by attaching the mouth to the flange portion 40. When drinking, the contents can be made easier to drink.

Further, as described above, the outer diameter R1 of the upper straight portion 42 is larger than the outer diameter R2 of the lower straight portion 45. In other words, the outer diameter R2 of the lower straight portion 45 is smaller than the outer diameter R1 of the upper straight portion 42. The outer diameter R2 of the lower straight portion 45 may be 73 mm as an example when the outer diameter R1 of the upper straight portion 42 is 74 mm.

Further, the flange portion 40 further has an inner curved portion 46 located inward in the radial direction of the upper straight portion 42 in the vertical cross section. The inner curved portion 46 is connected to the upper straight portion 42. The inner curved portion 46 is curved in a vertical cross section. Specifically, the inwardly curved portion 46 is curved so as to be convex upward and inward in the radial direction. As a result, when the user drinks the contents, the contents can be easily carried to the upper surface of the flange portion 40. Therefore, it is possible to prevent a large amount of contents from being delivered to the user's mouth at one time, and it is possible to ensure that the contents are smoothly delivered to the user's mouth. The radius of curvature r3 of the inner curved portion 46 is preferably 0.5 mm or more and 1.5 mm or less. When the radius of curvature r3 of the inner curved portion 46 is 0.5 mm or more, the contents can be more smoothly carried to the user's mouth. Further, when the radius of curvature r3 of the inner curved portion 46 is 1.5 mm or less, it is possible to prevent the width of the upper straight portion 42 from becoming too narrow.

Further, the flange portion 40 further has an inner side surface portion 48 located inward in the radial direction of the upper straight portion 42 in the vertical cross section. The inner side surface portion 48 is connected to the inner curved portion 46. The inner side surface portion 48 constitutes the inner side surface of the flange portion 40, and is inclined downward inward in the radial direction. Then, the inner side surface of the flange portion 40 formed by the inner side surface portion 48 is connected to the inner surface 202 of the body portion 20. The inner side surface portion 48 may extend in the vertical direction without inclining downward in the radial direction.

Such a resin container 10 can be manufactured by blow molding a preform 10a (described later) manufactured by compression molding a synthetic resin material. Further, as the material of the resin container 10, a thermoplastic resin such as polyethylene terephthalate (PET), polypropylene (PP), polystyrene (PS), polyethylene (PE) and the like can be used. The resin container 10 may be colored in a color such as red, blue, yellow, green, brown, black, or white, but is preferably colorless and transparent in consideration of ease of recycling. From the viewpoint of recycling, it is preferable to use colorless and transparent polyethylene terephthalate as the material of the resin container 10, and plant-derived PET or recycled PET that can reduce the environmental load can be used.

Further, the resin container 10 may be, for example, a container having a full filling capacity of 100 ml or more and 500 ml or less. Further, the height of the resin container 10 (the vertical distance from the upper surface of the flange portion 40 to the bottom surface 31 of the ground contact portion 33 of the bottom portion 30) H3 may be 50 mm or more and 200 mm or less.

Next, the sleeve 60 will be described with reference to FIGS. 1 and 4. Here, FIG. 4 is a developed view showing the sleeve 60. The sleeve 60 plays a role of increasing the rigidity of the composite container 10A including the resin container 10 by reinforcing the thinned body portion 20. The sleeve 60 is adhered to the body 20 of the resin container 10 by, for example, an adhesive.

As shown in FIG. 1, the sleeve 60 attached to the resin container 10 is a rigid body rolled into a tubular shape and covers the body 20 of the resin container 10. Since the sleeve 60 covers the body portion 20, the thinned body portion 20 is prevented from being crushed when the user grips the composite container 10A. Further, since the sleeve 60 covers the body portion 20, when the user holds the composite container 10A, the heat of the contents in the composite container 10A is less likely to be transmitted to the user's hand.

In this embodiment, the sleeve 60 covers the entire body portion 20. By covering the entire body portion 20 with the sleeve 60 in this way, the rigidity of the composite container 10A can be increased more effectively. In the illustrated example, the sleeve 60 covers the entire body portion 20, but is not limited to this. For example, although not shown, the sleeve 60 may cover only a part of the body portion 20. In this case, it is preferable that the sleeve 60 covers at least a portion where the user grips the resin container 10 by hand (for example, a portion located above the center of the body portion 20 in the height direction).

In this embodiment, the sleeve 60 is adhered to the resin container 10 with an adhesive. In this case, the adhesive for adhering the sleeve 60 to the resin container 10 may be applied to the entire surface of the body 20 or the entire inner surface of the sleeve 60 rolled into a tubular shape. preferable. As a result, it is possible to effectively prevent the sleeve 60 from being removed from the resin container 10. The sleeve 60 may be adhered to the resin container 10 by applying the adhesive to a part of the body portion 20 or a part of the inner surface of the sleeve 60 rolled into a tubular shape. Further, the sleeve 60 may be attached to the resin container 10 without using an adhesive. In this case, although not shown, for example, by providing the sleeve 60 with an engaging portion and providing the engaged portion with which the engaging portion engages in the resin container 10, the sleeve 60 becomes the resin container 10. It may be attached. Alternatively, the sleeve 60 may be held in the resin container 10 by a frictional force. In this case, the inner surface of the sleeve 60 may be coated in order to increase the coefficient of friction of the sleeve 60 made of paper. When applying a coating, in addition to general overprint varnish and clear coat, anti-slip varnish such as adhesive varnish (for example, varnish for blister packs) and foam varnish used for non-slip can be applied. good. When an adhesive is not used when attaching the sleeve 60 to the resin container 10, the sleeve 60 and the resin container 10 can be easily separated when the composite container 10A is discarded. Therefore, the recyclability of the resin container 10 can be improved.

Further, in the illustrated example, the upper end 62 of the sleeve 60 is in contact with the flange portion 40 from below. On the other hand, the lower end 63 of the sleeve 60 is located on the same plane as the bottom surface 31 of the ground contact portion 33 of the bottom surface 31 of the bottom portion 30 of the resin container 10. Thereby, when the composite container 10A is grounded, the stability of the composite container 10A can be improved.

As shown in FIG. 4, the unfolded sleeve 60 has a main body portion 60a and a glue margin portion 60b. Of these, the main body 60a has a fan shape when the sleeve 60 is unfolded. The sleeve 60 shown in FIG. 1 is obtained by rolling the developed sleeve 60 into a tubular shape and joining the main body portion 60a and the glue margin portion 60b with an adhesive or the like.

Such a sleeve 60 includes paperboard such as coated ball, card paper, ivory paper, cup base paper, milk carton paper, drawing paper, Kent paper, cardboard, etc., and may be so-called synthetic paper or laminated paper or composite paper in which various plastics are laminated. Often, functional paper having functions such as water resistance and oil resistance may be used. Further, special paper using a raw material other than pulp, such as a mixture of limestone and plastic, may be used. The basis weight of the paper used can be properly designed. For example, the paper to be used may have a basis weight of 100 g / m ² or more and 600 g / m ² or less, and preferably 250 g / m ² or more and 400 g / m ² or less. In addition, a pattern, characters, or the like may be partially printed in order to enhance the design.

(Cover material)
Next, the lid material 50 will be described.

The lid material 50 is made of a resin film. The lid material 50 has a substantially circular shape in a plan view, and is sealed on the flat upper surface of the flange portion 40 of the resin container 10 over the entire circumference. Such a lid material 50 is composed of a laminated body 51 having a layer structure as shown in FIG.

That is, as shown in FIG. 5, the laminated body 51 constituting the lid material 50 includes a base material layer 52 sequentially arranged from the outside, an intermediate layer 53, and an adhesive layer 54. The base material layer 52 is, for example, a layer for supporting the adhesive layer 54 and increasing the strength of the entire laminated body 51. The intermediate layer 53 is for adjusting the thickness of the laminated body 51, for example. The adhesive layer 54 is a layer for adhering the lid material 50 to the flange portion 40 of the resin container 10.

Specifically, as the laminate 51 constituting the lid material 50, for example, a laminate having the following layer structure can be used, and the thickness of the adhesive layer 54 can be appropriately set between 30 μm and 60 μm or less.

(Outside) Polyethylene terephthalate film (PET) 12 μm / Nylon film (Ny) 15 μm / Polyethylene terephthalate film (PET) 30 μm or more and 60 μm or less (Inside)

As the material of the adhesive layer 54, it is preferable to use a resin material capable of exhibiting so-called easy peeling property. Further, each of the above layers is formed by a dry lamination method, an extrusion lamination method, an extrusion coating method or another coating method according to a conventional method.

(preform)
Next, the preform 10a for manufacturing the resin container 10 described above will be described. As shown in FIG. 6, the preform 10a includes a body portion 20a, a bottom portion 30a provided below the body portion 20a, and a flange portion 40a provided at the upper end of the body portion 20a. Of these, the body portion 20a corresponds to the body portion 20 of the resin container 10 described above, and has an inverted truncated cone shape in which the diameter is gradually reduced from the upper side (flange portion 40a side) to the lower portion (bottom portion 30a side). have. The body portion 20a may have a substantially cylindrical shape.

The bottom portion 30a corresponds to the bottom portion 30 of the resin container 10 described above, and has a substantially hemispherical shape.

Further, there is no gate mark on the bottom surface 31a of the bottom portion 30a. That is, as will be described later, the preform 10a is produced by compression molding. Therefore, the bottom surface 31a of the bottom portion 30a of the preform 10a is not formed with a gate mark formed on the preform 10a produced by, for example, injection molding. As a result, when the preform 10a is dropped, it is possible to prevent the bottom 30a of the preform 10a from being damaged due to the gate mark, that is, so-called gate cracking. Therefore, the drop strength at the bottom 30a of the preform 10a can be improved. Further, since there is no gate mark on the bottom surface 31a of the bottom portion 30a, it is possible to prevent the preforms 10a from being scratched when the preforms 10a come into contact with each other. Therefore, for example, when the step of manufacturing the preform 10a and the step of manufacturing the resin container 10 from the preform 10a are carried out at different places (factory, etc.), the plurality of preforms 10a are packed together. Even if this is the case, it is possible to prevent the preforms 10a from being scratched.

The flange portion 40a corresponds to the flange portion 40 of the resin container 10 described above, and has a substantially annular shape in a plan view. Further, the flange portion 40a projects horizontally from the upper end of the body portion 20a toward the side. As will be described later, the flange portion 40a forms the flange portion 40 of the resin container 10 without stretching. Therefore, the flange portion 40a of the preform 10a has substantially the same shape as the flange portion 40 having the upper straight portion 42, the upper curved portion 43, the lower curved portion 44, and the lower straight portion 45 in the vertical cross section (see FIG. 2). have.

Next, the operation of the present embodiment having such a configuration will be described. Here, the method for manufacturing the resin container 10, the method for manufacturing the composite container 10A, and the method for manufacturing the container 1 with a lid are described in FIGS. 7 (a)-(c), 8 (a)-(b), and FIG. This will be described with reference to (a)-(b) and FIGS. 10 (a)-(b).

Method for Manufacturing Resin Container First, the method for manufacturing the resin container 10 will be described with reference to FIGS. 7 (a)-(c), 8 (a)-(b) and 9 (a)-(b). do.

First, the preform 10a is produced by performing compression molding using the first mold 70A. Here, the first mold 70A has a first cavity side mold 71 and a core 72 (see FIG. 7B described later). Of these, the core 72 includes a core body 72a and a stretch rod 72b inserted into the core body 72a.

When producing the preform 10a, first, as shown in FIG. 7A, the resin material R is supplied into the first cavity side mold 71. The resin material R is a resin used as a material for the preform 10a. The resin material R is supplied into the first cavity side mold 71 in a molten state.

Next, as shown in FIGS. 7 (b)-(c), the core 72 is mounted on the first cavity side mold 71 to which the resin material R is supplied, and the resin material R is compression-molded. To prepare a preform 10a. At this time, before the resin material R is cooled and solidified, the resin material R is pressed by the first cavity side mold 71 and the core 72. As a result, as shown in FIG. 7C, the resin material R is stretched between the first cavity side mold 71 and the core 72. After that, the resin material R is cooled by the first cavity side mold 71 and the core 72, so that the preform 10a is produced.

In this way, a preform 10a including a body portion 20a, a bottom portion 30a provided below the body portion 20a, and a flange portion 40a provided at the upper end of the body portion 20a can be obtained. Here, as will be described later, the flange portion 40 of the resin container 10 is a portion that is not stretched, and is formed by the flange portion 40a of the preform 10a. Therefore, the flange portion 40a of the preform 10a produced by compression molding has substantially the same shape as the flange portion 40 having the upper straight portion 42, the upper curved portion 43, the lower curved portion 44, and the lower straight portion 45 (FIG. 2). (See) is formed to have.

Next, as shown in FIG. 8A, the preform 10a is removed from the first cavity side mold 71 together with the core 72.

Next, the resin container 10 is manufactured by performing blow molding on the preform 10a using the second mold 70B. Here, the second mold 70B has a second cavity side mold 73 and the core 72 described above (see FIG. 8B described later). Of these, the second cavity side mold 73 is composed of a pair of mold members 73a and 73b that are separated from each other. The inner surface of the second cavity side mold 73 has a shape corresponding to the body portion 20, the bottom portion 30, and the flange portion 40 of the resin container 10.

When manufacturing the resin container 10, first, as shown in FIG. 8B, the core 72 is mounted on the second cavity side mold 73 together with the preform 10a. In FIG. 8B, the pair of mold members 73a and 73b are open to each other. In this state, the preform 10a is inserted together with the core 72 between the pair of mold members 73a and 73b of the second cavity side mold 73.

Next, as shown in FIG. 9A, the pair of mold members 73a and 73b are closed. The preform 10a may be heated by a heating device (not shown) before being mounted on the second cavity side mold 73.

Next, by performing blow molding on the preform 10a, a resin having a body portion 20, a bottom portion 30 provided below the body portion 20, and a flange portion 40 provided at the upper end of the body portion 20. A manufacturing container 10 is manufactured. At this time, as shown in FIG. 9B, air is press-fitted into the preform 10a from between the core body 72a of the core 72 and the stretch rod 72b, and blow molding is performed on the preform 10a. NS. Depending on the shape of the resin container 10 to be produced, the stretch rod 72b may be moved downward (lower side shown in FIG. 9B) with respect to the core main body 72a. By moving the stretch rod 72b downward with respect to the core body 72a, a high-height resin container 10 can be easily manufactured.

In this way, the preform 10a is shaped into a shape corresponding to the inner surface of the second cavity side mold 73, and the resin container 10 is obtained from the preform 10a. At this time, the body portion 20a of the preform 10a is stretched to form the body portion 20 of the resin container 10. Further, the bottom portion 30a of the preform 10a is stretched to form the bottom portion 30 of the resin container 10. On the other hand, the flange portion 40 of the resin container 10 is a portion that is not stretched, and is formed by the flange portion 40a of the preform 10a. As a result, even when the thickness T12 of the thin portion 24 of the body portion 20 is reduced, the thickness T3 of the flange portion 40 can be increased. Therefore, when the lid material 50 is sealed to the flange portion 40, it is possible to suppress the occurrence of a sealing defect. Further, when the lid material 50 is opened from the flange portion 40, it is possible to prevent the lid material 50 from being lowered in openability.

Here, of the body portion 20 formed by stretching the body portion 20a of the preform 10a, the thick portion 22 is located closer to the flange portion 40 than the thin portion 24 (see FIG. 2). Therefore, in the body portion 20, the stretch ratio of the thick portion 22 is lower than the stretch ratio of the thin portion 24, and the thickness T11 of the thick portion 22 is thicker than the thickness T12 of the thin portion 24. In this case, the thickness T11 of the thick portion 22 of the body portion 20 is preferably 0.5 mm or more and 1.5 mm or less, and the thickness T12 of the thin wall portion 24 of the body portion 20 is 0.1 mm or more and 0.4 mm or less. .. Further, in the wall thinning portion 23 of the body portion 20, the stretching ratio gradually increases from the upper side (flange portion 40 side) to the lower side (bottom portion 30 side), and the thickness of the thinning portion 23 increases upward (flange portion 40). It gradually becomes thinner from the side) to the bottom (bottom 30 side). The thickness T2 of the bottom portion 30 is preferably 0.2 mm or more and 0.7 mm or less. Further, the thickness T3 of the flange portion 40 is 1.0 mm or more and 3.0 mm or less.

In this way, a resin container 10 having a body portion 20, a bottom portion 30 connected to the body portion 20, and a flange portion 40 connected to the body portion 20 is obtained.

Manufacturing Method of Composite Container and Manufacturing Method of Container with Cover Material Next, a manufacturing method of the composite container 10A and a manufacturing method of the container 1 with a lid material will be described with reference to FIGS. 10 (a)-(b).

First, for example, the resin container 10 is produced by the methods shown in FIGS. 7 (a)-(c), 8 (a)-(b) and 9 (a)-(b).

Further, in parallel with the production of the resin container 10, the sleeve 60 is prepared. At this time, first, for example, a coat ball, card paper, ivory paper, or the like is punched into a predetermined shape. As a result, the sleeve 60 in the unfolded state is produced (see FIG. 4). Next, the unfolded sleeve 60 is rolled into a tubular shape, and the main body portion 60a and the glue margin portion 60b are joined with an adhesive or the like.

Next, the sleeve 60 is attached to the body 20 of the resin container 10. At this time, for example, first, the adhesive is supplied to the sleeve 60 or the body 20 of the resin container 10. Next, as shown in FIG. 10A, for example, the resin container 10 is inserted into the sleeve 60 from above the sleeve 60, and the sleeve 60 is mounted on the resin container 10. As a result, the sleeve 60 is attached to the resin container 10, and a composite container 10A including the resin container 10 and the sleeve 60 is obtained.

Further, in parallel with the production of the composite container 10A, the lid material 50 is prepared. At this time, for example, a laminated body 51 in which the base material layer 52, the intermediate layer 53, and the adhesive layer 54 are laminated in this order may be produced by a dry laminating method or the like. After that, the lid material 50 is manufactured by punching the laminated body 51 into a predetermined shape with a cutting tool or the like.

Next, the composite container 10A is filled with the contents, and the composite container 10A is sealed by the lid material 50. At this time, first, the composite container 10A is filled with the contents (not shown). Next, the lid material 50 is placed on the flange portion 40. Although not shown, the lid material 50 is placed on the flange portion 40 so that the adhesive layer 54 (see FIG. 5) of the laminate 51 constituting the lid material 50 faces the composite container 10A side.

Next, the lid material 50 is sealed to the flange portion 40 with a sealing hot plate or the like (not shown). As described above, the thickness T3 of the flange portion 40 is 1.0 mm or more and 3.0 mm or less. As described above, when the thickness T3 of the flange portion 40 is 1.0 mm or more, it is possible to suppress the decrease in the rigidity of the flange portion 40, and when the lid member 50 is sealed to the flange portion 40, the seal is sealed. It is possible to effectively suppress the occurrence of defects.

In this way, as shown in FIG. 10B, a container 1 with a lid material is obtained, which includes the composite container 10A and the lid material 50 for sealing the composite container 10A.

At the time of use, the user first peels off the lid material 50 of the container 1 with a lid material and removes it. After that, the user tilts the composite container 10A and puts the flange portion 40 on the mouth to drink the contents.

As described above, according to the present embodiment, the body portion 20 has a thick-walled portion 22 connected to the flange portion 40, a wall-reduced portion 23 located on the bottom 30 side of the thick-walled portion 22, and a wall-reduced portion. It has a thin-walled portion 24 located on the bottom 30 side of the portion 23. Further, the thickness T3 of the flange portion 40 is thicker than the thickness T11 of the thick portion 22. That is, the thickness T3 of the flange portion 40 is thicker than the thickness T12 of the thin wall portion 24 of the body portion 20. As a result, even when the amount of resin used is reduced by reducing the thickness T12 of the thin-walled portion 24, it is possible to suppress the decrease in the rigidity of the flange portion 40. Therefore, it is possible to prevent the flange portion 40 from being deformed. As a result, when the lid material 50 is sealed to the flange portion 40, it is possible to suppress the occurrence of a sealing defect, and it is possible to suppress the deterioration of the opening property of the lid material 50.

Further, the thickness T11 of the thick portion 22 is thicker than the thickness T12 of the thin portion 24. As a result, the rigidity in the vicinity of the flange portion 40 can be increased. In particular, even when the amount of resin used in the resin container 10 is reduced by providing the body portion 20 with the thin-walled portion 24 which is thinner than the thick-walled portion 22, the rigidity in the vicinity of the flange portion 40 is increased. be able to. Therefore, it is possible to prevent the flange portion 40 from being deformed when the user grips the resin container 10.

Further, the thickness of the thinned portion 23 gradually decreases from the flange portion 40 side to the bottom portion 30 side. In this way, the moldability of the body portion 20 can be improved by providing the wall-reducing portion 23 whose thickness gradually decreases between the thick-walled portion 22 and the thin-walled portion 24.

Further, the height H1 of the thick portion 22 is 10 mm or more and 30 mm or less. As a result, the rigidity in the vicinity of the flange portion 40 can be effectively increased, and it is possible to prevent the flange portion 40 from being deformed when the user grips the resin container 10. Further, since the height H1 of the thick portion 22 is 30 mm or less, the proportion of the thin portion 24 in the body portion 20 can be increased. Therefore, the amount of resin used can be reduced.

Further, according to the present embodiment, the wall thinning portion 23 is thinned from the inside of the resin container 10. As a result, even when the thin-walled portion 23 is provided between the thick-walled portion 22 and the thin-walled portion 24, the outer surface 201 of the body portion 20 is made into a straight line in which unevenness or the like is not formed in the vertical cross section. Can be formed. Therefore, for example, when the sleeve 60 is attached to the body portion 20 of the resin container 10 with an adhesive, the area where the sleeve 60 contacts the body portion 20 of the resin container 10 can be increased, and the sleeve 60 can be formed. Can be easily installed.

Further, according to the present embodiment, the thickness T11 of the thick portion 22 is 0.5 mm or more and 1.5 mm or less, and the thickness T12 of the thin portion 24 of the body portion 20 is 0.1 mm or more and 0.4 mm or less. The thickness T3 of the flange portion 40 is 1.0 mm or more and 3.0 mm or less. As described above, when the thickness T11 of the thick portion 22 is 0.5 mm or more, the rigidity of the thick portion 22 can be kept high. By keeping the rigidity of the thick portion 22 high in this way, it is possible to prevent the flange portion 40 connected to the thick portion 22 from being deformed when the user grips the resin container 10. .. Further, when the thickness T12 of the thin portion 24 of the body portion 20 is 0.4 mm or less, the amount of resin used for the resin container 10 can be reduced. Further, even when the body portion 20 is thinned so that the thickness T12 of the thin portion 24 of the body portion 20 is 0.4 mm or less, the thickness T3 of the flange portion 40 is 1.0 mm or more, so that the flange It is possible to suppress a decrease in the rigidity of the portion 40, and it is possible to suppress the occurrence of a sealing defect when the lid member 50 is sealed to the flange portion 40. Further, when the lid material 50 is opened from the flange portion 40, it is possible to prevent the lid material 50 from being lowered in openability. Further, since the thickness T3 of the flange portion 40 is 1.0 mm or more, the mouthfeel with respect to the flange portion 40 can be improved.

Further, according to the present embodiment, the resin container 10 is manufactured by compression blow molding. By producing the resin container 10 by compression blow molding in this way, in the resin container 10, the thickness T11 of the thick portion 22 of the body portion 20, the thickness T12 of the thin portion 24, the thickness T2 of the bottom portion 30, and the flange. The thickness T3 of the portion 40 can be formed to a desired thickness. That is, even when the thickness T12 of the thin portion 24 of the body portion 20 is reduced, the thickness T3 of the flange portion 40 can be increased, and the decrease in the rigidity of the flange portion 40 can be suppressed. Therefore, when the lid material 50 is sealed to the flange portion 40, it is possible to suppress the occurrence of a sealing defect, and it is possible to suppress the deterioration of the opening property of the lid material 50.

On the other hand, as a comparative example, in a resin container manufactured by injection molding, when the thickness of the body portion and the bottom portion is reduced, the thickness of the flange portion is also reduced according to the thickness of the body portion and the bottom portion. As a result, the sealing property of the lid material with respect to the flange portion and the opening property of the lid material may be deteriorated, and it is difficult to reduce the wall thickness of the container. Further, when a resin container is produced by injection molding, it is difficult to reduce the thickness of the body of the container to 0.4 mm or less. Further, when a resin container is manufactured by sheet molding, even if the thickness of the body portion can be reduced to 0.4 mm or less, it is difficult to reduce the thickness of the flange portion, and the thickness of the flange portion is reduced. It is difficult to make it 3.0 mm or less, and in particular, it is difficult to make the thickness of the flange portion 2.0 mm or less. Further, when a resin container is manufactured by sheet molding, sharp corners are formed on the flange portion by punching the flange portion.

On the other hand, according to the present embodiment, since the resin container 10 is manufactured by compression blow molding, as described above, the weight of the resin container 10 is reduced and the amount of resin used is reduced. Can be reduced. Further, when the lid material 50 is sealed to the flange portion 40, it is possible to suppress the occurrence of a sealing defect, and it is possible to suppress the deterioration of the opening property of the lid material 50. Further, since the preform 10a is manufactured by complex molding, the flange portion 40a of the preform 10a is substantially the same as the flange portion 40 having the upper straight portion 42, the upper curved portion 43, the lower curved portion 44, and the lower straight portion 45. The flange portion 40a can be easily formed so as to have a shape (see FIG. 2). Therefore, it is possible to suppress the formation of sharp corners on the flange portion 40 of the resin container 10, and it is possible to improve the mouthfeel with respect to the flange portion 40. Further, when the resin container 10 is manufactured by compression blow molding, the manufacturing cost of the container can be reduced as compared with the case where the resin container is manufactured by injection blow molding. Further, when the resin container 10 is manufactured by compression blow molding, the manufacturing time can be shortened as compared with the case where the resin container is manufactured by injection blow molding. Therefore, the resin container 10 can be manufactured at low cost and in a short time.

Further, according to the present embodiment, there is no gate mark on the bottom surface 31 of the bottom portion 30. As a result, when the resin container 10 is dropped, it is possible to prevent the bottom 30 of the resin container 10 from being damaged due to the gate mark, that is, so-called gate cracking. Therefore, the drop strength at the bottom 30 of the resin container 10 can be improved. Further, since there is no gate mark on the bottom surface 31 of the bottom portion 30, there is no restriction on the printing position when printing characters or the like on the bottom portion 30.

Further, according to the present embodiment, the composite container 10A includes a resin container 10 and a sleeve 60 that covers the body 20 of the resin container 10. As a result, even when the amount of resin used in the resin container 10 is reduced, it is possible to prevent the composite container 10A from being lowered in rigidity.

Deformation Example of Container with Cover Material In the above-described embodiment, an example in which the container 1 with a lid material includes a composite container 10A and a lid material 50 for sealing the composite container 10A has been described. Not limited. For example, as shown in FIG. 11, the container with a lid material (resin container with a lid material) 1a may include a resin container 10 and a lid material 50. That is, the sleeve 60 may not be provided on the outside of the resin container 10.

Modification Example of Resin Container Next, a modification of the resin container 10 according to the present embodiment will be described with reference to FIGS. 12 to 17. In FIGS. 12 to 17, the same parts as those of the embodiments shown in FIGS. 1 to 10 are designated by the same reference numerals, and detailed description thereof will be omitted.

(First modification of the resin container)
In the above-described embodiment, an example in which the radius of curvature r3 of the inner curved portion 46 is 0.5 mm or more and 1.5 mm or less has been described, but the present invention is not limited to this. For example, the radius of curvature r3 of the inner curved portion 46 may be less than 0.5. In this case, as shown in FIG. 12, the inclination angle α of the inner side surface portion 48 with respect to the central axis is preferably 5 ° or more and 45 ° or less. When the inclination angle α is 5 ° or more, the contents can be easily carried to the upper surface of the flange portion 40 when the user drinks the contents. Therefore, it is possible to prevent a large amount of contents from being delivered to the user's mouth at one time, and it is possible to ensure that the contents are smoothly delivered to the user's mouth. Further, when the inclination angle α is 45 ° or less, it is possible to prevent the width of the upper straight portion 42 from becoming too narrow. Although not shown, the inner side surface portion 48 may be directly connected to the upper straight portion 42. Further, in the present specification, the inclination angle α means the inclination angle of the tangent line of the inner side surface portion 48 at the point located at the center in the height direction of the flange portion 40.

Further, as shown in FIG. 12, the wall thinning portion 23 may be thinned from the outside of the resin container 10. That is, when the virtual line X2 extending from the outer surface 201 of the body portion 20 in the thick portion 22 and the virtual line X2 extending in parallel with the outer surface 201 of the body portion 20 in the thick portion 22 is provided, the wall thickness portion 23 The outer surface 201 of the body portion 20 may be recessed inward in the radial direction with respect to the virtual line X2. In this way, when the wall thinning portion 23 is thinned from the outside of the resin container 10, when the sleeve 60 is attached to the resin container 10, the body portion 20 of the resin container 10 and the sleeve 60 are combined. A gap can be formed between them. Thereby, the heat insulating effect of the composite container 10A can be improved. Further, even in this deformation, the moldability of the body portion 20 can be improved.

(Second modification of the resin container)
Further, as shown in FIG. 13, the wall thinning portion 23 may be thinned from both the inside and the outside of the resin container 10. That is, the inner surface 202 of the body portion 20 of the wall thinning portion 23 is recessed radially outward with respect to the virtual line X1, and the outer surface 201 of the body portion 20 of the wall thinning portion 23 is radially inward with respect to the virtual line X2. It may be dented. In this case, the moldability of the body portion 20 can be further improved.

(Third modification of the resin container)
Further, in the above-described embodiment, an example in which the outer surface 201 of the body portion 20 is formed in a straight line with no unevenness or the like formed in the vertical cross section has been described, but the present invention is not limited to this. For example, unevenness or the like may be formed on the outer surface 201 of the body portion 20. In this case, as shown in FIG. 14, a regulating portion 21 for restricting the resin containers 10 from sticking to each other when the resin containers 10 are stacked is formed on the thick portion 22 of the body portion 20. You may. The regulating portion 21 projects outward in the radial direction. In this modification, the regulation portion 21 is formed over the entire circumference of the body portion 20.

In this modification, as shown in FIG. 15, when the resin containers 10 are stacked, the regulation portion 21 of one resin container 10 is made of another resin located below the one resin container 10. It comes into contact with the flange portion 40 of the container 10. As a result, a plurality of resin containers 10 can be stored without fixing the stacked resin containers 10 to each other. Further, it is possible to easily separate the resin containers 10 one by one from the plurality of resin containers 10 stored in a stacked state.

When such a resin container 10 is manufactured, as shown in FIG. 16, a protruding portion 21a corresponding to the regulation portion 21 has a shape in advance on the body portion 20a of the preform 10a for manufacturing the resin container 10. It may have been done. Such a preform 10a can be easily obtained by changing the shapes of the first cavity side mold 71 and the core 72 of the first mold 70A (see FIG. 7B and the like).

Further, the regulating portion 21 is preferably a portion that is not stretched, and is preferably formed by a protruding portion 21a of the preform 10a. As a result, it is possible to suppress the thickness of the regulating portion 21 from becoming thin, and the rigidity of the regulating portion 21 can be maintained high.

When the resin container 10 according to this modification is manufactured, as shown in FIG. 17A, when the pair of mold members 73a and 73b are closed, the pair of mold members 73a and 73b and the preform 10a Mold members 73a and 73b having a shape such that a gap is not formed between the protruding portion 21a and the protruding portion 21a are prepared. Then, as shown in FIG. 17B, by performing blow molding on the preform 10a, the regulating portion 21 is formed by the protruding portion 21a of the preform 10a. In this way, it is possible to obtain the resin container 10 in which the regulation portion 21 is formed on the body portion 20.

As described above, according to the present modification, the thick portion 22 of the body portion 20 is formed with a regulating portion 21 that regulates the resin containers 10 from sticking to each other when the resin containers 10 are stacked. ing. As a result, a plurality of resin containers 10 can be stored without fixing the stacked resin containers 10 to each other. Further, it is possible to easily separate the resin containers 10 one by one from the plurality of resin containers 10 stored in a stacked state. Further, since the regulating portion 21 is formed in the thick portion 22, the rigidity of the regulating portion 21 can be kept high. As a result, it is possible to prevent the regulation unit 21 from being deformed. Therefore, it is possible to more effectively prevent the stacked resin containers 10 from sticking to each other, and the resin containers 10 are one by one from the plurality of resin containers 10 stored in the stacked state. The resin container 10 can be separated more easily when the resin container 10 is separated.

Although not shown, a plurality of regulation units 21 may be provided along the circumferential direction. In this case, although not shown, a gap is formed between the regulating portions 21 in the circumferential direction. The gap serves as an air vent when the resin containers 10 are separated one by one from the plurality of resin containers 10 stored in a stacked state. Therefore, it is possible to easily separate the resin containers 10 one by one from the plurality of resin containers 10 stored in a stacked state.

(Fourth modification of the resin container)
Further, in the above-described embodiment, an example in which the resin container 10 is manufactured by compression blow molding has been described, but the present invention is not limited to this. The resin container 10 may be manufactured by, for example, injection blow molding.

The present disclosure is not limited to the above-described embodiment and each modification as it is, and at the implementation stage, the components can be modified and embodied without departing from the gist thereof. In addition, various inventions can be formed by an appropriate combination of the plurality of components disclosed in the above-described embodiment and each modification. Some components may be removed from all components shown in the embodiments and variations.

1 Composite container with lid 1a Resin container with lid 10 Resin container 10A Composite container 20 Body 21 Regulator 22 Thick wall 23 Thin wall 24 Thin wall 30 Bottom 31 Bottom 40 Flange 50 Lid 60 Sleeve

Claims (13)

A cup-shaped resin container
At the bottom
With the torso
A flange portion connected to the body portion is provided.
The body is
A thick portion connected to the flange portion and a thick portion
A thinned portion located on the bottom side of the thick portion and
It has a thin-walled portion located on the bottom side of the thinned portion, and has a thin-walled portion.
The thickness of the flange portion is thicker than the thickness of the thick portion.
The thickness of the thick portion is thicker than the thickness of the thin portion.
The thickness of the thinned portion gradually decreases from the flange portion side to the bottom portion side.
A resin container having a thick portion having a height of 10 mm or more and 30 mm or less. The resin container according to claim 1, wherein a regulating portion is formed on the thick portion to prevent the resin containers from sticking to each other when the resin containers are stacked on top of each other. A cup-shaped resin container
At the bottom
With the torso
A flange portion connected to the body portion is provided.
The body is
A thick portion connected to the flange portion and a thick portion
A thinned portion located on the bottom side of the thick portion and
It has a thin-walled portion located on the bottom side of the thinned portion, and has a thin-walled portion.
The thickness of the flange portion is thicker than the thickness of the thick portion.
The thickness of the thick portion is thicker than the thickness of the thin portion.
The thickness of the thinned portion gradually decreases from the flange portion side to the bottom portion side.
A resin container in which a regulating portion for restricting the sticking of the resin containers to each other when the resin containers are stacked on the thick portion is formed. The thickness of the thick portion is 0.5 mm or more and 1.5 mm or less, the thickness of the thin portion is 0.1 mm or more and 0.4 mm or less, and the thickness of the flange portion is 1.0 mm or more. The resin container according to any one of claims 1 to 3, which is 0 mm or less. The resin container according to any one of claims 1 to 4, wherein the thinned portion is thinned from the inside of the resin container. The resin container according to any one of claims 1 to 4, wherein the thinned portion is thinned from the outside of the resin container. The resin container according to any one of claims 1 to 4, wherein the thinned portion is thinned from both inside and outside of the resin container. The resin container according to any one of claims 1 to 7, which is produced by compression blow molding. The resin container according to any one of claims 1 to 8, wherein there is no gate mark on the bottom surface of the bottom portion. The resin container according to any one of claims 1 to 7, which is produced by injection blow molding. The resin container according to any one of claims 1 to 10 and the resin container.
A resin container with a lid material, comprising a lid material for sealing the resin container. The resin container according to any one of claims 1 to 10 and the resin container.
A composite container including a reinforcing member that covers at least a part of the body of the resin container. With the composite container according to claim 12.
A composite container with a lid material, comprising a lid material for sealing the composite container.

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