JP2002283441A - Bottle type container made of synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a grip feeling of a container of a pinch grip type. SOLUTION: A pinch grip type bottle shape container made of a synthetic resin is formed by executing twice blow molding a cylindrical preform with a bottom via a heat treatment to form a grip part at an upper part B of a container body 1. In this case, the grip part is executed by pressing for approaching shell opposing regions of a material to be molded to each other when second blow molding is executed, and a flat region 1a reduced in its diameter as compared with the diameter of the preform is provided at the grip part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called pinch-grip type bottle-type container in which a concave portion is formed in a region of a container body facing a body portion, and the container is held by using a region connecting the concave portions as a grip portion. It is intended to further improve the grip feeling of the container.

[0002]

2. Description of the Related Art Recently, containers made of synthetic resin manufactured by blow molding such as biaxial stretching have been used as containers filled with soy sauce, edible oil, liquor, and the like.

[0003] Such containers often have a relatively large capacity, with a filling capacity exceeding 1.8 liters, and are difficult to hold with one hand, and have a structure in which a separately formed handle is attached to the container body. Is becoming more common.

[0004] By the way, it is difficult to reduce the cost of a container with a handle attached since the number of parts constituting the container is large and a separate process for assembling the handle is required.

In recent years, it has been required to reduce the amount of refuse. However, since this kind of container uses a large amount of material per container, there is a limit in reducing the amount of refuse. .

As a prior art relating to this point, Japanese Patent Application Laid-Open No. Hei 2 (1996) -1990 discloses that a concave portion is directly formed in a body portion of a container when the container is blow-molded, and the concave portion is used as a grip portion to hold the container.
A pinch grip type container as disclosed in Japanese Patent Publication No. 39926 is also proposed.

This type of container is provided with a concave portion to which a fingertip is applied in each of the facing regions of the body, and holds the container by gripping the concave portion. Since a member for forming a handle is not required, the manufacturing process is simplified. It is possible to reduce the amount of resin to be used because there is no handle.However, since the grip is formed simultaneously with blow molding, it is extremely limited due to restrictions on the stretching state of the material. It is difficult to give a peculiar shape, such as forming a region having a bent portion, and the problem is left where grip is shallow and grip feeling is poor.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to propose a novel container which can improve the grip feeling of a pinch grip type container and can be securely held with one hand.

[0009]

According to the present invention, there is provided a pinch grip formed by subjecting a preform having a bottom to a cylindrical shape to blow molding twice by sandwiching a heat treatment to form a gripping portion on an upper portion of a container body. A synthetic resin bottle type container,
The gripping portion is provided with a flat region smaller than the diameter of the preform by performing a pressing process to bring the body facing region of the molded body closer to each other at the time of the second blow molding. It is a bottle type container.

In the present invention, it is desirable that the grip portion has a concave portion formed along the circumference of the body portion and communicates with the flat region, and the concave portion has a width, a depth and a length for arranging a finger. Is preferred.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically with reference to the drawings. 1 to 3 show side, front and plan views of a synthetic resin bottle-shaped container according to the present invention.

In the drawing, 1 is a container body, 2 is a container body 1
It is the mouth part which becomes integral with. The container body 1 has a plurality of inwardly projecting ribs L having a function of increasing the strength of the container.
And a top portion B (which can be used as a label for decorating a container) formed by applying a pressing process to bring the opposing regions close to each other to form a flat region 1a. Has functions.

Reference numeral 3 denotes a recess formed in the upper part B of the container body 1 so as to extend along the periphery of the body. The concave portion 3 has a width, a depth, and a length for placing a finger, and an end thereof is connected to the flat region 1a.

The container having the structure shown in FIGS.
A cylindrical preform 4 with a bottom as shown in FIG. 4 is used, but the container according to the invention has a width t of the flat area 1a.
Is formed so as to be smaller than the outer diameter T or the inner diameter of the preform 4, so that not only the rigidity of the portion A is increased, but also the container can be securely held, and the grip feeling is remarkably improved. Furthermore, although the conventional pinch grip container enables gripping only from the side of the trunk, the pinch grip container of the present invention has the gripping portion provided on the upper part of the main body, so that it can be gripped from the side. In addition to the above-mentioned gripping, gripping from above can be performed, and a gripping portion that functions effectively when carrying the container is provided.

FIG. 5 shows another configuration example of the container according to the present invention. This container has the same configuration except that the concave portion 3 in the embodiment of FIG. 1 is omitted, and is not inferior to the one shown in FIG. Demonstrate function.

FIGS. 6 (a) to 6 (d) show each step in the process of manufacturing the container according to the present invention. In order to form the flat region 1a in the upper portion B, FIG. It can be formed by, for example, directly pressing a mold at the time of the second blow molding using the molded body as shown in c).

In the present invention, the bottle is formed into a bottle-shaped container by performing two blow moldings with a heat treatment interposed therebetween. However, in the container manufactured through such a process, the residual embedding in the main body portion is extremely reduced. In addition, there is an advantage that the strength of the resin is high because the density of the resin is increased, and in the case of a normal container (single blow), the temperature at which deformation of the container is allowable is about 85 to 87 ° C. In the container according to the present invention, the temperature is about 90 to 93 ° C.

The specific manufacturing procedure of the container is as follows. First, a preform 4 having a whitened mouth as shown in FIG. 4 can be used to exert a distraction effect, for example, at 70 to 130 ° C. (more preferably 90 to 130 ° C.).
120 ° C.), 50 to 230 ° C. (more preferably 70 to 180 ° C.), stretching surface magnification 4 to 22 times (more preferably 6 to 15 times, 1.2 to 1.2 times more than the finished product in volume)
Under the condition that the oversize is about 2.5 times), blow molding by the first biaxial stretching is performed to obtain a molded body as shown in FIG. 6B.

Next, 110 to 25 are added to the obtained molded body.
At 5 ° C. (more preferably 130 ° C. to 200 ° C.), a forced heat treatment is performed to shrink the finished product to about 0.6 to 0.95 times to remove internal residual stress (FIG. 6).
(C)), and further at 60 to 170 ° C. (more preferably 8 to 170 ° C.).
A second biaxial stretch blow molding is performed in a temperature range of 0 to 150 ° C. (FIG. 6D).

The resin usable in the present invention includes, but is not limited to, saturated polyester-based thermoplastic resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate.

[0021]

According to the present invention, since the grip of the container is deep, the grip feeling is good, and the container can be securely held.

[Brief description of the drawings]

FIG. 1 shows a side view of a container according to the invention.

FIG. 2 is a view showing the front of the container shown in FIG. 1;

FIG. 3 is a plan view of the container shown in FIG. 1;

FIG. 4 is a view showing the appearance of a preform used for molding the container shown in FIG.

FIG. 5 is a diagram showing a side view of a container having another configuration according to the present invention.

6a to 6d are views showing the appearance of the container according to the present invention at each stage of production.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container main body 1a Flat area 2 Mouth 3 Recess 4 Preform A Lower part B Upper part T Outer diameter t Width

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E033 AA01 BA18 CA20 DA03 DB01 DC03 DD03 DE02 FA03 3E062 AA09 AB01 AC02 HA04 HB07 HC01 4F208 AA24 AG22 AG26 AG29 AH55 LA03 LA04 LB01 LG14 LG40

Claims (3)

[Claims] 1. A pinch-grip type synthetic resin bottle-type container in which a tubular preform with a bottom is subjected to two blow-moldings sandwiching a heat treatment to form a gripping portion at an upper portion of a container body. In the gripping portion, a flat region smaller than the diameter of the preform is provided by performing a pressing process to bring the body facing regions of the molded body closer to each other at the time of the second blow molding. Synthetic resin bottle type container. 2. The synthetic resin bottle type container according to claim 1, wherein the grip portion has a concave portion formed along the periphery of the body portion and communicating with the flat region. 3. The synthetic resin bottle-shaped container according to claim 2, wherein the recess has a width, a depth and a length for placing a finger.