JP5353959B2 - Container with handle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container with a handle which is capable of providing a container having good blow moldability, and does not cause various failures on the container and the handle and moreover, and has a sufficient strength also against fall down shock. <P>SOLUTION: The container with a handle is formed of a mouth section, a shoulder section, a barrel section, and a bottom section sequentially from an upper part, a protrusion section for attaching the handle which is formed from an end face being formed into a panel-like shape is provided in the recess section of the polyester container in which the recess section has been provided in a part of this barrel section, and another polyester handle is attached in this recess section. It is preferable that the handle is attached by providing a space between itself and a wall surface around the protrusion section for attaching the handle, thereby, the blow moldability is good, therefore, no failure, such as a gap, a crack, a wrinkle, a deformation and the unbalance of a wall thickness due to unsuitable elongation are caused on the container and the handle, and the sufficient strength can be possessed also against the fall down shock. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a container with a handle that can be filled with a liquid such as tea, and a heat-resistant container with a handle that can be filled with a liquid in a high temperature state without deformation of the container. In a container with a handle in which a separate handle is attached to the recess in a polyester container having a recess in a part of the body portion, a handle mounting convex portion is provided in the recess, and an end surface of the handle mounting convex portion The present invention relates to a container with a handle that is formed in a panel shape to increase the processing amount, improve the thickness distribution, and suppress the generation of wrinkles during high temperature filling.

The plastic container is widely used because it has a handle in a large size of 1.5L, 2.0L or more that contains beverages such as tea, alcoholic beverages, seasonings and the like. On the other hand, the container with a handle is often made of a polyester such as polyethylene terephthalate and the handle is made of polypropylene in terms of performance and cost.
The following are known as examples of the plastic container with a handle.

JP 2000-255580 A JP 2000-43877 A

  The material of Patent Document 1 is made of polyester, which is the same as the material of the container, from the viewpoint of recyclability. As shown in FIGS. 9 and 10, the mouth part a, shoulder part b, trunk A container g made of a polyester having a part c and a bottom part d, a recess e formed in a part of the body part c and a handle attaching convex part f in the recess e, and a handle attaching convex part of the container g It consists of a polyester handle h attached to the portion f, and is provided with a gap j between the wall surface i around the handle attaching convex portion f and the handle h in the recess e. As a result, by providing the gap j, the friction resistance between the wall surface i around the handle mounting convex portion f and the handle h is reduced, the blow moldability is improved, and the recess d is scratched, melted, whitened, or recessed. The thickness defect of d and the bottom part d is eliminated, and a good heat-resistant container with a handle is obtained.

  In addition, as shown in FIG. 11, the heat-resistant container with a handle of Patent Document 2 is formed by insert-molding a separate handle h into a body c on the polyester container g and attaching the handle h to the upper body c. The cross-sectional shape of the lower body portion c formed with a circular cross-section is formed into a square shape, and the wall surface of the body portion c that wraps the undercut portion of the handle h. As a result, the ratio between the area of the vacuum absorbing panel k and the surface area below the neck ring of the mouth part a is 0.22 or more, whereby a heat resistant container with a good handle can be obtained.

In recent years, in order to increase volumetric efficiency during storage and transportation, plastic containers are often required to be rectangular containers having a substantially square cross-sectional shape.
However, the container with a handle disclosed in Patent Document 1 has an effect that blow moldability is improved and problems that occur in the recess d and the bottom d are eliminated. Only a circular shape is described, and neither a problem for obtaining a square container with a handle nor a solution means is described. Moreover, there is no description about imparting heat resistance that enables high-temperature filling.

  Further, in the heat-resistant container with a handle of Patent Document 2, the cross section of the trunk portion below the handle attachment position has a quadrangular shape, but the cross section of the upper portion to which the handle is attached is circular, so that the volume efficiency can be improved. Still unsatisfied. Furthermore, it is said that good heat resistance can be obtained by heat-setting the body part that wraps the undercut part of the handle, but what is heat-set is the container wall in contact with the mold, and the handle undercut part is Since the portion to be wrapped is located inside the container, it cannot be directly heat set, and there is a possibility that the grip mounting strength may be reduced due to shrinkage / deformation during high temperature filling.

  Accordingly, the object of the present invention is to provide excellent storage properties, good blow moldability, and cause problems such as cracks, cracks, wrinkles, deformation, and imbalance in wall thickness due to improper stretching in the container and handle. Another object of the present invention is to provide a container with a handle that has a sufficient strength against a drop impact and a heat-resistant container with a handle that has heat resistance.

The present invention has been proposed in order to achieve the above object, and is characterized by having the following configuration.
That is, according to the present invention, a separate handle is attached to the concave portion in a polyester container which is composed of a mouth portion, a shoulder portion, a trunk portion and a bottom portion in order from the top, and a concave portion is provided in a part of the trunk portion. in a handle with a container comprising Te, the handle mounting protrusion provided in the recess, with the retaining of the grip around the end face of the handle mounting protrusion is formed like a flange, a further recess to the end face A container with a handle is provided which is formed into a panel shape .

  Moreover, according to this invention, the said container with a handle formed by providing a space | gap part between the said surroundings and the wall surface around the convex part for handle attachment is provided.

  Further, according to the present invention, there is provided the above-mentioned container with a handle, wherein the container with a handle is a heat-resistant container with a handle and is heat-fixed to a wall surface around the convex part for attaching the handle.

  The container with a handle according to the present invention is formed by forming a panel shape on a panel-like end surface, and the amount of processing increases and the wall thickness distribution becomes good. And it is possible to reduce the occurrence of defects in the handle. Furthermore, if a convex part for grip attachment is provided in the concave part and the handle is attached with a gap between the wall surface around the convex part for grip mounting, the gap between the wall surface around the convex part for grip attachment in the concave part and the handle In addition, the void portion in (2) further improves the blow moldability, so that the container and the handle are not broken, cracked, wrinkled, deformed, and improperly stretched, resulting in problems such as imbalance in wall thickness. Thickness balance by proper stretching, that is, thickness according to the necessity of strength, and sufficient strength against dropping impact can be obtained.

It is a side view of a container with a handle (heat-resistant container with a handle) showing a preferred embodiment of the present invention. It is the sectional view on the AA line of FIG. It is a front view of the container with a handle (heat-resistant container with a handle) of the present invention. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is the enlarged view which abbreviate | omitted a part of handle which shows the panel-shaped end surface of this invention. It is a rear view of the handle used for the container of this invention. It is a side view of the handle used for the container of this invention. It is the XX sectional view taken on the line of FIG. It is a side view which shows the example of the conventional container with a handle. It is the side view to which the principal part of the handle of the conventional container with a handle was expanded. It is a side view which shows the example of the conventional heat-resistant container with a handle.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

1 is a side view of a container with a handle (heat-resistant container with a handle) showing an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, FIG. 3 is a front view of the container with a handle, and FIG. 3 is a cross-sectional view taken along the line B-B of FIG. 3, FIG. 5 is an enlarged view showing the panel shape of the end face of the convex portion for attaching the handle, FIG. 6 is a rear view of the handle used for the container with the handle, and FIG. 8 is a sectional view taken along line XX in FIG.
In the drawing, a container 1 with a handle is composed of a mouth part 2, a shoulder part 3, a body part 4 and a bottom part 5 in order from the top, and a recessed part 6 is provided in a part of the body part 4 and a handle is attached to the recessed part 6. A polyester container 8 provided with a convex portion 7 and a polyester grip 9 attached to the handle attaching convex portion 7 of the container 8, and a wall surface 10 and a handle 9 around the handle attaching convex portion 7 in the concave portion 6. The body 4 has a substantially square cross section, the recess 6 is located at the corner 13 of the upper half 12 of the body 4 and is used for attaching the handle. The convex part 7 is located in the concave part 6 on the diagonal L of the upper half part 12.

  The mouth portion 2 of the container 8 has a screw 20 for screwing the cap on, and a flange 21 below the screw 20. The mouth portion 2 reaches the trunk portion 4 via the shoulder portion 3, and the trunk portion 4 is constituted by a side wall 22, and a lower portion of the side wall 22 is connected to the bottom portion 5.

  As described above, the trunk portion 4 has a substantially square cross-sectional shape, and is divided into the upper half portion 12 and the lower half portion 31 with a lateral groove 30 in the middle as a boundary, and a corner portion of the upper half portion 12. 13 is provided with the recess 6 to which the handle 9 is attached. The concave portion 6 is formed so as not to come out from the outer diameter of the body portion 4 when the handle 9 is attached thereto, so that the concave portion 6 can be closely attached and efficiently stored. This concave portion 6 is provided with a handle mounting convex portion 7, which is located in the concave portion 6 on the diagonal L of the upper half portion 12, and has a side wall 32 and a panel-like end surface 33. It consists of. The side wall 32 is formed to be sufficiently high, and has a gap portion 11 between the wall surface 10 around the handle mounting convex portion 7 and the handle 9.

When the container 11 is molded, the gap 11 is inserted between the wall surface 10 and the handle 9 around the handle mounting convex portion 7, and the mold is heated to increase the temperature around the handle mounting convex portion 7. It is possible to heat set the wall surface 10. Further, as shown in FIGS. 3 and 5, the panel-like end surface 33 is formed in a flange shape (flange-like portion 33 a), and does not come out when the handle 9 is attached to the handle attaching convex portion 7. It is like that.
Further, by forming a recess in the panel-shaped end face 33 to form a panel shape (panel-shaped portion 33b), the processing amount increases, the thickness distribution becomes good, and the generation of wrinkles during high temperature filling is suppressed. It is possible to further reduce the occurrence of problems in the container 8 and the handle 9 due to the shrinkage.

  As shown in FIGS. 7 and 8, the handle 9 is composed of a gripping portion 40 and a mounting portion 41 attached to the handle mounting convex portion 7 of the container 8. The gripping portion 40 has an H-shaped cross section. is there. Reference numeral 42 is an inner plate, and 43 is an outer plate. The mounting portion 41 has a ring 44 to be fitted into the handle mounting convex portion 7 and a protrusion 45 above the ring 44, and the ring 44 and the protrusion 45 allow the handle from the concave portion 6 of the container 8 to be attached. 9 is prevented from coming off and rattling. In FIG. 4, 46 is a reinforcing rib.

  The materials of the container 8 and the handle 9 described above are all made of polyester. Examples thereof include polyethylene terephthalate (PET), polybutylene terephthalate, and copolyester mainly composed of ethylene terephthalate units. Moreover, the material of the handle 9 may be a recycled material of a container made of polyethylene terephthalate, and if this is adopted, the recyclability will be further increased.

Next, the suitable manufacturing method of the container 1 with a handle (heat-resistant container with a handle) 1 which becomes the said structure is described.
First, a separate polyester handle 9 is injection molded. Next, a polyester preform to be the container 8 is set in a blow molding die, and a separate polyester handle 9 injection-molded in the blow molding die is set. Then, the preform is blow-molded into a hollow container 8. The side wall 32 of the handle mounting convex portion 7 is formed sufficiently high, and a gap 11 having a sufficient margin is formed between the wall surface 10 around the handle mounting convex portion 7 and the handle 9. As described above, since the mold enters the space 11 between the wall surface 10 around the handle mounting convex portion 7 and the handle 9, the handle mounting convex portion 7 can be obtained by increasing the temperature of the mold. The surrounding wall surface 10 can be heat set, and the distortion of this portion can be removed in advance.

Hereinafter, the superiority of the container with a handle of the present invention will be shown.
<Test Example 1>
A heat-resistant container with a handle having a capacity of 2 L is produced from the polyester preform used as a container and a separate polyester handle obtained by injection molding by the above-described manufacturing method.
The following two types of tests were conducted in this heat-resistant container with a handle.
(1) 2 L of hot water at 85 ° C. was filled in a heat-resistant container with a handle, and after cooling to room temperature, the drop height that could be withstood was measured.
(2) The thickness of the side wall of the trunk portion under the handle mounting convex portion was measured.

<Control Example 1>
Do not provide a gap between the wall surface around the handle mounting convex portion and the handle (therefore, the portion of the wall surface around the handle mounting convex portion that is in contact with the handle is not heat set), and a PFA release agent A heat-resistant container with a handle having a capacity of 2 L is produced in the same manner as in Test Example 1 except that the coating is not applied. Five containers were used as samples.

The above measurement results are as follows.
(1) <State of gripping part>
The container with a handle of Test Example 1 was firmly fixed even after filling with hot water, whereas the container with a handle of Control Example 1 was wrinkled around the handle portion when filled with hot water, There were things that the handle was wobbling or coming off.
(2) <Thickness of the side wall of the trunk below the convex part for grip attachment>
In the heat-resistant container with a handle of Test Example 1, the average was about 0.30 mm, and there was no particular problem in appearance with respect to the reduced pressure inside the container, but in the container with a handle of Control Example 1, the handle was an average of about 0.25 mm. Abnormalities such as the lower body deformed into a diamond shape and the container bent were observed.
(3) <Result of drop test>
Although the container with a handle of Test Example 1 had no defects such as breakage up to a drop height of 1.2 m, the container with a handle of Control Example 1 had a drop height of 0.3 m and was already broken. .

  Although the first embodiment of the present invention has been described above, the specific configuration is not limited to this, and the cross-sectional shape of the body portion of the container is substantially square, but does not depart from the gist of the present invention. It should be understood that changes in range are possible as appropriate.

  The container with a handle according to the present invention is superior in storage, and is extremely useful when heat resistance is required and recyclability is also required.

1 Container with handle (heat-resistant container with handle)
2, a mouth part 3, b shoulder part 4, c trunk part 5, d bottom part 6, e concave part 7, f handle attaching convex part 8, g container 9, h handle 10, i wall surface 11, j gap part 12 above Half 13 Corner 14 Vertical rib 20 Screw 21 Flange 22 Side wall 30 Horizontal groove 31 Lower half 32 Side wall 33 Panel-shaped end face
33a Flange-shaped part
33b Panel shape part 40 Grasping part 41 Mounting part 42 Outer plate 43 Inner plate 44 Ring 45 Protrusion 46 Reinforcement rib J Center axis k Decompression panel L Diagonal line

Claims (3)

In a container with a handle comprising a mouth part, a shoulder part, a trunk part and a bottom part in order from the top, a polyester container having a concave part in a part of the trunk part, and a separate handle attached to the concave part, A handle mounting convex portion is provided in the concave portion, and the periphery of the end surface of the handle mounting convex portion is formed in a flange shape to prevent the handle from being detached, and a concave portion is further formed in the end surface to form a panel shape. A container with a handle.   The container with a handle according to claim 1, wherein the handle is attached with a space provided between a wall surface around the handle attaching convex portion.   The container with a handle according to claim 2, wherein the container with a handle is a heat-resistant container with a handle and is heat-fixed to a wall surface around the convex portion for attaching the handle.