JP7038624B2 - Extruded blow container - Google Patents

Description

The present invention relates to an extruded blow container.

Generally, in an extrusion blow container, air is blown into the parison with the parison extruded from the die head of the extruder sandwiched between molding dies, and the extruded blow container and the mouth of the extruded blow container are directed upward. It is obtained by forming a molded body integrally formed with an extended waste tube portion, then removing the molded body from the molding die, and cutting the boundary portion between the extrusion blow container and the discard tube portion.
As this type of extruded blow container, for example, as shown in Patent Document 1 below, a flange portion is formed at the upper end portion of the mouth portion so as to project inward in the radial direction, and a sealing material is formed on the upper surface of the flange portion. The composition to be attached is known.

Japanese Unexamined Patent Publication No. 2009-220889

However, in the conventional extruded blow container, when the consumer tries to drink the contents by peeling the sealing material from the upper surface of the flange portion and directly attaching the mouth to the mouth of the extruded blow container, for example, the lips are uncomfortable. It may make you feel a nice touch.

The present invention has been made in view of such circumstances, and an object thereof is that it is possible to secure the adhesive strength of the sealing material to the mouth portion, and the consumer can use the mouth portion of the extruded blow container. It is to provide an extruded blow container that can suppress the unpleasant tactile sensation of the lips when the mouth is put on the lips.

In order to solve the above problems, the present invention proposes the following means.
In the extruded blow container according to the present invention, the upper end portion of the mouth portion protrudes outward in the radial direction from the tubular portion extending in the container axial direction and the upper end portion of the tubular portion, and a sealing material is attached to the upper surface. It has a flange portion, and the radial width on the upper surface of the flange portion is 1.0 mm or more, and the inner peripheral surface at the upper end portion of the mouth portion is continuous with the upper surface of the flange portion and is radial. A first curved surface portion formed in a curved surface shape that is recessed toward the outside, and a second curved surface portion that extends downward from the first curved surface portion and is formed in a protruding curved surface shape toward the inside in the radial direction. The connecting portion between the first curved surface portion and the second curved surface portion is located on the outer side in the radial direction from the outer peripheral surface of the tubular portion.

According to the present invention, since the radial width on the upper surface of the flange portion to which the sealing material is attached is 1.0 mm or more, it is possible to secure the adhesion strength of the sealing material to the upper surface of the flange portion. can.
Further, since the inner peripheral surface at the upper end portion of the mouth portion is connected to the upper surface of the flange portion and has a first curved surface portion formed in a curved surface shape that is recessed outward in the radial direction, the inner surface portion at the upper end portion of the mouth portion is provided. Compared to the configuration in which the entire peripheral surface is formed in the shape of a curved surface protruding inward in the radial direction and consists only of the second curved surface portion, the size of the flange portion by the size of the first curved surface portion in the container axial direction. The thickness can be secured. Therefore, even if the width in the radial direction on the upper surface of the flange portion is widened, it is possible to suppress the tendency of the flange portion to bend and deform, and when the sealing material is attached to the upper surface of the flange portion, for example, a seal is used. It is possible to prevent the material from being displaced with respect to the flange portion.
Further, since the inner peripheral surface at the upper end portion of the mouth portion includes the second curved surface portion formed in the shape of a curved surface protruding inward in the radial direction, the consumer attaches the mouth portion to the mouth portion of the extruded blow container. At that time, it is possible to suppress the feeling of an unpleasant tactile sensation especially at the contact portion such as the upper lip.
Further, since the connecting portion between the first curved surface portion and the second curved surface portion is located on the outer side in the radial direction from the outer peripheral surface of the tubular portion, the second curved surface portion can be elongated outward in the radial direction. This makes it possible to prevent the lips from coming into contact with the first curved surface when the consumer puts the mouth on the mouth of the extruded blow container, which is particularly unpleasant at the contact points such as the upper lip. It is possible to suppress the feeling of a soft touch even more reliably.

Here, in the vertical cross-sectional view along the container axial direction, the angle formed by the portion of the tangent line at the upper end edge of the first curved surface portion located below the upper surface of the flange portion and the upper surface of the flange portion is It is larger than 90 °.

In this case, in the vertical cross-sectional view, the angle between the tangent line at the upper end edge of the first curved surface portion, which is located below the upper surface of the flange portion, and the upper surface of the flange portion is larger than 90 °. Therefore, when the consumer puts his / her mouth on the mouth of the extruded blow container, even if the lips come into contact with the first curved surface portion, it is possible to suppress the feeling of unpleasant touch.

Further, the outer peripheral surface at the lower end portion of the flange portion may be formed in a curved surface shape with a protrusion toward the outside in the radial direction.

In this case, since the outer peripheral surface at the lower end of the flange portion is formed in a curved surface shape that protrudes outward in the radial direction, especially when the consumer attaches a mouth to the mouth portion of this extruded blow container. It is possible to suppress the unpleasant tactile sensation of the contact portion such as the lower lip.

Further, the outer peripheral surface at the upper end portion of the flange portion may be formed in a curved surface shape with a protrusion toward the outside in the radial direction.

In this case, since the outer peripheral surface at the upper end of the flange portion is formed in a curved surface shape that protrudes outward in the radial direction, when the consumer puts the mouth on the mouth portion of this extruded blow container, the lips It is possible to surely suppress the unpleasant tactile sensation.

According to the present invention, it is possible to secure the adhesive strength of the sealing material to the mouth portion, and when the consumer puts the mouth on the mouth portion of this extruded blow container, the lips feel unpleasant to the touch. Can be suppressed.

It is a side view which shows the main part of the extrusion blow container which concerns on one Embodiment of this invention. It is a partially enlarged vertical sectional view of the extrusion blow container shown in FIG. 1.

Hereinafter, the extruded blow container according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2.
Examples of the contents to be filled in the extruded blow container 1 include beverages such as liquid yogurt and nutritional drinks, and the content of the extruded blow container 1 is, for example, 600 ml or less. The extruded blow container 1 is suitably adopted for applications in which a consumer drinks the contents by directly attaching a mouth to the mouth 11 of the extruded blow container 1. In particular, the extruded blow container 1 has an internal volume of 200 ml or less, and is suitably used for the purpose of drinking up the contents without recapping (resealing) after opening.

In the extruded blow container 1, the mouth portion 11, the shoulder portion 12, the body portion 13, and the bottom portion are arranged coaxially with the container shaft O, and are arranged in this order from the upper side to the lower side in this order to form a bottomed cylinder. It is formed.
The cross-sectional view of the extruded blow container 1 is circular. At least the inner peripheral surface and the outer peripheral surface of each of the mouth portion 11, the shoulder portion 12, and the body portion 13 extend along each other and have the same shape.
The body portion 13 extends in the direction of the container axis O, and the shoulder portion 12 gradually extends inward in the radial direction from the lower side to the upper side.

The mouth portion 11 includes a lower cylinder portion 14 extending upward from the upper end portion of the shoulder portion 12, and an upper cylinder portion (cylinder portion) 15 arranged above the lower cylinder portion 14 and extending in the container axis O direction. The lower cylinder portion 14 and the upper cylinder portion 15 are connected to each other, and the overhanging cylinder portion 16 formed to have a larger diameter than the lower cylinder portion 14 and the upper cylinder portion 15 and the upper end portion of the upper cylinder portion 15 to the outside in the radial direction. A flange portion 17 is provided, which protrudes toward the surface and has a sealing material S attached to the upper surface thereof. The upper end portion of the mouth portion 11 includes an upper cylinder portion 15 and a flange portion 17.

The inner diameter of the mouth portion 11 is, for example, 15 mm or more and 70 mm or less, preferably 20 mm or more and 50 mm or less. The average thickness of the mouth portion 11 is, for example, 0.5 mm or more and 2.6 mm or less, preferably 0.7 mm or more and 1.5 mm or less. When the inner diameter of the mouth portion 11 is 20 mm or more and 50 mm or less and the average thickness of the mouth portion 11 is 0.7 mm or more and 1.5 mm or less, the consumer directly puts the mouth into the mouth portion 11. An extruded blow container 1 can be obtained in which the contents can be easily drunk by attaching and the increase in weight is suppressed.

The inner diameters of the lower cylinder portion 14 and the upper cylinder portion 15 are the same as each other, and the outer diameters of the lower cylinder portion 14 and the upper cylinder portion 15 are the same as each other. The size of the upper cylinder portion 15 in the container shaft O direction is smaller than the size of the lower cylinder portion 14 in the container shaft O direction, and is equivalent to the size of the overhanging cylinder portion 16 in the container shaft O direction.
In the illustrated example, the maximum outer diameter of the mouth portion 11 is the outer diameter of the overhanging cylinder portion 16. The minimum inner diameter of each of the lower cylinder portion 14 and the upper cylinder portion 15 is about 28 mm, and the thickness of this portion is about 1.0 mm.

Further, in the present embodiment, the inner peripheral surface at the upper end portion of the mouth portion 11 is connected to the upper surface of the flange portion 17, and is formed into a curved surface shape that is recessed toward the outside in the radial direction, and the first curved surface portion 21. It includes a second curved surface portion 22 that extends downward from the curved surface portion 21 and is formed in a protruding curved surface shape toward the inside in the radial direction.
The first curved surface portion 21 and the second curved surface portion 22 are continuous without a step. The first curved surface portion 21 and the second curved surface portion 22 gradually extend outward in the radial direction as they go upward.

The radius of curvature r1 of the first curved surface portion 21 is smaller than the radius of curvature r2 of the second curved surface portion 22 in the vertical cross-sectional view along the container axis O direction.
In the illustrated example, the radius of curvature r1 of the first curved surface portion 21 is about 0.55 mm and the radius of curvature r2 of the second curved surface portion 22 is about 2.0 mm in the vertical cross-sectional view. In the vertical cross-sectional view, the radius of curvature r2 of the second curved surface portion 22 is three times or more the radius of curvature r1 of the first curved surface portion 21.

The size of the first curved surface portion 21 in the container shaft O direction is less than half the thickness of the flange portion 17 in the container shaft O direction. The size of the first curved surface portion 21 in the container axis O direction is smaller than the size of the second curved surface portion 22 in the container axis O direction. The lower end edge of the first curved surface portion 21 is located above the lower surface of the flange portion 17. At the upper end of the mouth portion 11, the thickness of the connecting portion between the flange portion 17 and the upper cylinder portion 15 is the minimum. The second curved surface portion 22 is located over the lower portion of the flange portion 17 and the upper portion of the upper cylinder portion 15.

In the vertical cross-sectional view, the angle θ1 formed by the portion of the tangent line L1 at the upper end edge of the first curved surface portion 21 located below the upper surface of the flange portion 17 and the upper surface of the flange portion 17 is larger than 90 °. ing. This angle θ1 is preferably 95 ° or more, and is about 103 ° in the illustrated example.
The connecting portion 24 between the first curved surface portion 21 and the second curved surface portion 22 is located outside the outer peripheral surface of the upper cylinder portion 15 in the radial direction. The radial distance between the connecting portion 24 and the outer peripheral surface of the upper cylinder portion 15 is the same as the radial size of the first curved surface portion 21. The connecting portion 24 is located above the central portion of the flange portion 17 in the container axis O direction.

The upper surface of the flange portion 17 extends along a plane orthogonal to the container axis O. The radial width of the upper surface of the flange portion 17 is 1.0 mm or more, preferably 1.2 mm or more and 2.0 mm or less. When the radial width of the upper surface of the flange portion 17 is 1.2 mm or more, the adhesive strength of the sealing material S to the upper surface of the flange portion 17 can be surely secured, and when it exceeds 2.0 mm, the flange portion 17 may be easily bent and deformed, for example.
In the illustrated example, the radial width of the upper surface of the flange portion 17 is about 1.4 mm, and the thickness of the flange portion 17 in the container axis O direction is about 0.9 mm. The radial width of the upper surface of the flange portion 17 is larger than the thickness of the flange portion 17 in the container axis O direction.

The outer peripheral surface at the lower end of the flange portion 17 is a third curved surface portion 17a formed in a curved surface shape with a protrusion toward the outside in the radial direction. In the vertical cross-sectional view, the radius of curvature r3 of the third curved surface portion 17a is 0.1 mm or more and 1.0 mm or less, preferably 0.3 mm or more and 0.7 mm or less. In the illustrated example, the radius of curvature r3 of the third curved surface portion 17a is about 0.3 mm in the vertical cross-sectional view, which is smaller than the radius of curvature r1 of the first curved surface portion 21.

The outer peripheral surface of the upper end portion of the flange portion 17 is the upper end portion of the fourth curved surface portion 17b formed in the shape of a curved surface protruding outward in the radial direction.
Here, the fourth curved surface portion 17b is located over a portion of the outer peripheral surface of the flange portion 17 that is located below the central portion in the container axis O direction from the upper end edge. The positions of the central portion of the fourth curved surface portion 17b in the container axis O direction and the above-mentioned connection portions 24 in the container axis O direction are equal to each other. The fourth curved surface portion 17b gradually extends inward in the radial direction as it goes upward.

In the vertical cross-sectional view, the radius of curvature r4 of the fourth curved surface portion 17b is 0.3 mm or more and 1.3 mm or less, preferably 0.5 mm or more and 1.1 mm or less, and more preferably 0.5 mm or more and 1.0 mm or less. ing. In the illustrated example, the radius of curvature r4 of the fourth curved surface portion 17b is about 1.0 mm in the vertical cross-sectional view, which is larger than the thickness of the flange portion 17 in the container axis O direction.
The size of the fourth curved surface portion 17b in the container axis O direction is larger than the size of the third curved surface portion 17a in the container axis O direction. The size of the fourth curved surface portion 17b in the container axis O direction is more than twice the size of the third curved surface portion 17a in the container axis O direction. The radius of curvature r4 of the fourth curved surface portion 17b is larger than the radius of curvature r3 of the third curved surface portion 17a.
By setting the radius of curvature r3 of the third curved surface portion 17a and the radius of curvature r4 of the fourth curved surface portion 17b to 0.5 mm or more and 1.0 mm or less in the vertical cross-sectional view, the consumer can use the extruded blow container 1. It is possible to more reliably suppress the unpleasant tactile sensation of the lips when the mouth is attached to the mouth portion 11, and it is possible to suppress the increase in weight.

In the vertical cross-sectional view, the angle θ2 formed by the portion of the tangent line L2 at the upper end edge of the outer peripheral surface of the flange portion 17 below the upper surface of the flange portion 17 and the upper surface of the flange portion 17 is larger than 90 °. It has become. This angle θ2 is larger than the angle θ1.

On the outer peripheral surface of the flange portion 17, the portion located on the outermost side in the radial direction is located between the upper end portion of the third curved surface portion 17a and the lower end portion of the fourth curved surface portion 17b, and is located on the flange portion 17. It is located below the upper surface of. On the outer peripheral surface of the flange portion 17, the portion located between the upper end portion of the third curved surface portion 17a and the lower end portion of the fourth curved surface portion 17b is a straight cylinder portion 17c extending in the container axis O direction. Its length is shorter than the lengths of the third curved surface portion 17a and the fourth curved surface portion 17b. The straight cylinder portion 17c is located below the central portion of the flange portion 17 in the container axis O direction. The straight cylinder portion 17c is located below the connection portion 24 described above.
It is not necessary to provide the straight cylinder portion 17c on the outer peripheral surface of the flange portion 17.

Next, a method for manufacturing the extruded blow container 1 configured as described above will be described.

First, the parison extruded downward from the die head of the extruder is sandwiched between molding dies, placed in the cavity, and separated from the parison on the die head side. Next, air is blown into the inside of the parison in the cavity for blow molding. At this time, a molded body 20 is formed in which the extrusion blow container 1 and the waste cylinder portion 19 extending upward from the mouth portion 11 of the extrusion blow container 1 are integrally formed. After that, the molded body 20 is removed from the molding die, the boundary portion between the extrusion blow container 1 and the waste cylinder portion 19 is cut, and the two 1 and 19 are separated to form the extrusion blow container 1.

Here, the molded body 20 will be described.
The waste cylinder portion 19 is arranged coaxially with the container shaft O and extends upward from the upper surface of the flange portion 17 of the mouth portion 11.
The outer peripheral surface at the lower end of the waste cylinder portion 19 gradually extends outward in the radial direction as it goes downward, and becomes a fifth curved surface portion 19a formed in a protruding curved surface shape toward the outer side in the radial direction. There is. The fifth curved surface portion 19a is continuously connected to the fourth curved surface portion 17b of the extrusion blow container 1 without a step. In the vertical cross-sectional view, the fifth curved surface portion 19a and the fourth curved surface portion 17b form a single arc.

The inner peripheral surface at the lower end of the waste cylinder portion 19 is a sixth curved surface portion 19b formed in a curved surface shape that is recessed outward in the radial direction, and gradually increases upward from the upper end portion of the sixth curved surface portion 19b. It includes a seventh curved surface portion 19c that extends inward in the radial direction and is formed in a curved surface shape that protrudes inward in the radial direction.
The sixth curved surface portion 19b is continuously connected to the first curved surface portion 21 of the extrusion blow container 1 without a step. In the vertical cross-sectional view, the sixth curved surface portion 19b and the first curved surface portion 21 form a single arc. In the vertical cross-sectional view, the radius of curvature of the 7th curved surface portion 19c is larger than the radius of curvature of the 6th curved surface portion 19b, and the size of the 7th curved surface portion 19c in the container axis O direction is the container axis of the 6th curved surface portion 19b. It is larger than the size in the O direction.

Here, when the average thickness of the mouth portion 11 is relatively thin, for example, 0.5 mm or more and 2.6 mm or less, when the molded body 20 is blow-molded, the fourth curved surface portion of the extruded blow container 1 is formed. Following the molding of the 5th curved surface portion 19a of the 17b and the discarding cylinder portion 19 so as to project outward in the radial direction, the first curved surface portion 21 of the extrusion blow container 1 and the discarding cylinder portion The sixth curved surface portion 19b of 19 is formed so as to be pulled outward in the radial direction.

Next, a method of attaching the sealing material S to the upper surface of the flange portion 17 of the extruded blow container 1 configured as described above will be described.

First, the outer peripheral edge portion of the sealing material S is bent downward over the entire circumference to form the sealing material S in the shape of an eclipse cylinder, and the flange portion 17 is inserted inside thereof. As a result, the outer peripheral surface of the flange portion 17 is surrounded from the outside in the radial direction by the peripheral wall S1 of the sealing material S, and the upper surface of the flange portion 17 comes into contact with the lower surface of the top wall S2 of the sealing material S. At this time, the minimum gap between the outer peripheral surface of the flange portion 17 and the inner peripheral surface of the peripheral wall S1 of the sealing material S is 0.2 mm or more, preferably 0.4 mm or more, and in the illustrated example, about 0.4 mm. It has become. Then, the top wall S2 of the sealing material S is pressed against the upper surface of the flange portion 17 in a heated state to bond the lower surface of the top wall S2 of the sealing material S and the upper surface of the flange portion 17.

As described above, according to the extruded blow container 1 according to the present embodiment, the width in the radial direction on the upper surface of the flange portion 17 to which the sealing material S is attached is 1.0 mm or more, so that the flange portion It is possible to secure the sticking strength of the sealing material S to the upper surface of 17.
Further, since the inner peripheral surface at the upper end portion of the mouth portion 11 includes the second curved surface portion 22 formed in the shape of a curved surface protruding inward in the radial direction, the consumer can use the mouth portion 11 of the extruded blow container 1. It is possible to suppress an unpleasant tactile sensation, especially at the contact portion such as the upper lip, when the mouth is attached to the mouth.

Further, since the inner peripheral surface at the upper end portion of the mouth portion 11 is connected to the upper surface of the flange portion 17 and includes the first curved surface portion 21 formed in a curved surface shape that is recessed toward the outside in the radial direction, the mouth portion 11 is provided. Compared with the configuration in which the entire inner peripheral surface at the upper end portion is formed in the shape of a curved surface protruding inward in the radial direction and is composed of only the second curved surface portion 22, the first curved surface portion 21 is in the direction of the container axis O. The thickness of the flange portion 17 can be secured by the size. Therefore, even if the width in the radial direction on the upper surface of the flange portion 17 is widened, it is possible to suppress the flange portion 17 from being easily bent and deformed, and when the sealing material S is attached to the upper surface of the flange portion 17. In addition, for example, it is possible to prevent the sealing material S from being displaced with respect to the flange portion 17.

Further, in the vertical cross-sectional view, the angle θ1 formed by the portion of the tangent line L1 at the upper end edge of the first curved surface portion 21 located below the upper surface of the flange portion 17 and the upper surface of the flange portion 17 is 90 °. Since it is large, it is possible to suppress an unpleasant tactile sensation even if the lips come into contact with the first curved surface portion 21 when the consumer puts the mouth on the mouth portion 11 of the extruded blow container 1. Can be done.

Further, since the connecting portion 24 between the first curved surface portion 21 and the second curved surface portion 22 is located radially outside the outer peripheral surface of the upper cylinder portion 15, the second curved surface portion 22 is located outside in the radial direction. It becomes possible to make it overhang for a long time, and it becomes possible to prevent the lips from coming into contact with the first curved surface portion 21 when the consumer attaches the mouth to the mouth portion 11 of the extruded blow container 1. In particular, it is possible to more reliably suppress the unpleasant tactile sensation at the contact portion such as the upper lip.

Further, since the outer peripheral surface at the lower end portion of the flange portion 17 is the third curved surface portion 17a formed in the shape of a curved surface protruding outward in the radial direction, the consumer can use the mouth portion of the extruded blow container 1. When the mouth is attached to the eleven, it is possible to suppress the feeling of an unpleasant tactile sensation particularly at the contact portion such as the lower lip.
Further, since the outer peripheral surface at the upper end portion of the flange portion 17 is the upper end portion of the fourth curved surface portion 17b formed in the shape of a curved surface protruding outward in the radial direction, the consumer can use the extruded blow container 1. When the mouth is attached to the mouth portion 11, it is possible to surely suppress the unpleasant tactile sensation of the lips.

Further, the fourth curved surface portion 17b is formed in the shape of a protruding curved surface toward the outside in the radial direction, and gradually extends inward in the radial direction as it goes upward, and the container of the fourth curved surface portion 17b. Since the size in the axis O direction is larger than the size in the container axis O direction of the third curved surface portion 17a, and the radius of curvature r4 of the fourth curved surface portion 17b is larger than the radius of curvature r3 of the third curved surface portion 17a. , The outer peripheral surface of the upper end portion of the flange portion 17, which is the upper end portion of the fourth curved surface portion 17b, is pulled inward in the radial direction to make it difficult to project outward in the radial direction. And the minimum gap between the inner peripheral surface of the peripheral wall S1 of the sealing material S and the inner peripheral surface of the sealing material S can be secured by 0.2 mm or more. Therefore, when the sealing material S is adhered to the upper surface of the flange portion 17, when the flange portion 17 is inserted inside the ecstatic tubular sealing material S, the upper end portion of the fourth curved surface portion 17b and the sealing material S are formed. It becomes possible to secure a wide gap between the inner peripheral surface of the peripheral wall S1 and the peripheral wall S1 of the sealing material S at the upper end of the fourth curved surface portion 17b at the time of this insertion. It is possible to prevent the top wall S2 from tilting with respect to the upper surface of the flange portion 17. As a result, when the sealing material S is attached to the upper surface of the flange portion 17, it is possible to prevent the sealing material S from being displaced with respect to the flange portion 17.

The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above embodiment, the fourth curved surface portion 17b is located over the portion of the outer peripheral surface of the flange portion 17 located below the central portion in the container axis O direction from the upper end edge, and is located at the upper end portion of the flange portion 17. Although the outer peripheral surface in the above is shown to be the upper end portion of the fourth curved surface portion 17b, the fourth curved surface portion 17b is arranged only on the upper end portion of the outer peripheral surface of the flange portion 17, and the flange portion 17 is arranged. A configuration may be adopted in which the outer peripheral surface at the upper end portion is the entire fourth curved surface portion 17b.
Further, the third curved surface portion 17a may be arranged over a portion of the outer peripheral surface of the flange portion 17 located above the central portion in the container axis O direction from the lower end edge.
Further, the size of the first curved surface portion 21 in the container axis O direction may be larger than the size of the second curved surface portion 22 in the container axis O direction.

In addition, it is possible to appropriately replace the components in the embodiment with well-known components without departing from the spirit of the present invention, and the above-mentioned modifications may be appropriately combined.

1 Extruded blow container 11 Mouth 15 Upper cylinder (cylinder)
17 Flange portion 17a Third curved surface portion (outer peripheral surface at the lower end portion of the flange portion)
17b 4th curved surface (outer peripheral surface at the upper end of the flange)
21 1st curved surface part 22 2nd curved surface part 24 Connection part L1 Tangent S Sealing material θ1 Angle O Container shaft

Claims (4)

The upper end portion of the mouth portion has a tubular portion extending in the axial direction of the container and a flange portion protruding outward in the radial direction from the upper end portion of the tubular portion and to which a sealing material is attached to the upper surface.
The radial width on the upper surface of the flange portion is set to 1.0 mm or more.
The inner peripheral surface at the upper end of the mouth is
A first curved surface portion formed in a curved surface shape that is continuous with the upper surface of the flange portion and is recessed toward the outside in the radial direction.
It is provided with a second curved surface portion that extends downward from the first curved surface portion and is formed in a protruding curved surface shape toward the inside in the radial direction.
The extruded blow container in which the connecting portion between the first curved surface portion and the second curved surface portion is located radially outside the outer peripheral surface of the tubular portion. In the vertical cross-sectional view along the container axis direction
The first aspect of the present invention, wherein the angle between the tangent line at the upper end edge of the first curved surface portion and the portion located below the upper surface of the flange portion and the upper surface of the flange portion is larger than 90 °. Extruded blow container. The extrusion blow container according to claim 1 or 2, wherein the outer peripheral surface at the lower end portion of the flange portion is formed in a curved surface shape with a protrusion toward the outside in the radial direction. The extrusion blow container according to any one of claims 1 to 3, wherein the outer peripheral surface at the upper end portion of the flange portion is formed in a curved surface shape protruding outward in the radial direction.

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