JPH0516945A - Plastic bottle with handle - Google Patents

Abstract

PURPOSE:To provide a plastic bottle with handle for which the strength at the handle attaching area on the bottle main body is improved, and the attaching strength of the handle is also improved. CONSTITUTION:A recessed part 11 for handle attachment is formed on the body part of a bottle main body 10 which is formed by blow molding with a polyester resin. For a plastic bottle with handle for which a handle 20 which is made of the same type of resin is attached in the recessed part 11, a handle welding surface 12, which is in a state of smooth surface, is provided on the wall surface at the deepest area of the recessed part 11, and at the same time, a smooth surface 23 to correspond with the handle welding surface 12 is provided on the end surface of the handle 20, and the smooth surface 23 is welded on the handle welding surface 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic bottle with a handle, more specifically, a saturated polyester resin, particularly a polyethylene terephthalate resin, is molded into a bottle body molded by a biaxial stretching method by a conventional blow molding method using the same resin. Plastic bottle with a handle attached with the handle.

[0002]

2. Description of the Related Art Since a plastic bottle becomes inconvenient to handle when it is upsized, a bottle with a handle is used as a detergent. In such a plastic bottle with a handle, when the bottle body and the handle are made of the same resin, the bottle body and the handle are usually fused and integrated.

As a procedure for integrating the bottle body and the handle, the handle is separately formed in advance, the handle is placed in a molding die in which the parison is arranged, and when the parison is blow molded, A method of fusing the handle to the body part, or blow molding of the parison in the molding die to mold the bottle body, and then injecting the handle molding resin into the handle molding die to form the body of the bottle body. The method of fusing the handle to the part is adopted.

[0004]

However, in any of the above methods, the handle mounting portion of the body of the bottle body is thin due to stretching during blow molding.
There was a problem with the attachment strength of the handle.

Therefore, an object of the present invention is to provide a plastic bottle with a handle which can improve the strength of the handle mounting portion of the bottle body and the handle mounting strength.

[0006]

In order to achieve the above object, the plastic bottle with a handle of the present invention has a handle mounting recess formed in the body of a bottle body molded by blow molding of a polyester resin, In a plastic bottle with a handle in which a handle made of the same kind of resin is attached to the recess, a smooth handle fusion surface is provided on the innermost wall surface of the recess, and the handle fusion surface is provided on the back of the handle. Is provided, and the smooth surface is fused to the handle fusion surface.

[0007]

[Operation] According to the above configuration, since the portion where the handle of the bottle body is fused is the innermost portion of the handle mounting concave portion having a short distance from the parison, the stretching ratio is reduced and the fused portion is It becomes thicker and the strength is improved. Further, since both of the smooth surfaces are brought into surface contact with each other and fused, the fusion strength is improved and the stress due to the impact is dispersed, so that the deformation of the fused portion can be suppressed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail based on an embodiment shown in the drawings.

FIG. 1 is a partially cutaway front view of a plastic bottle with a handle, FIG. 2 is a cross-sectional view, and FIG. 3 is a side view of a bottle main body on the handle mounting side.

The plastic bottle with a handle is a bottle body 10 obtained by blow molding a parison made of polyester resin such as polyethylene terephthalate resin.
And a handle 20 obtained by injection-molding the same type of resin as the bottle body 10 are integrated.

The bottle body 10 is formed with a recess 11 for mounting a handle on the upper part of the body, and a handle fusion bonding surface 12 having a substantially smooth surface is formed on the innermost wall surface of the recess 11. ing. The handle 20 is formed of a hand-holding portion (grasping portion) 21 and a mounting portion 22 attached to the bottle body 10.
A smooth surface 23 corresponding to the grip fusing surface 12 is formed on the inner surface of the mounting portion 22.

In this way, the bottle main body 10 and the handle 20 are integrated by fusion of the substantially smooth surface-shaped handle fusing surface 12 and the smooth surface 23 to improve the attachment strength of the handle 20. You can

The handle smoothing surface 12 having a substantially smooth surface is formed by adjusting the stretch ratio during blow molding to 8 times or less, preferably 6 times or less in terms of area ratio.
It is possible to further improve the fusion bonding strength with the smooth surface 23 of 0. By setting the thickness of the handle fusing surface 12 to 450 μm or more, preferably 600 μm or more, the fusing strength between the handle fusing surface 12 and the smooth surface 23 is further improved.

As means for making the draw ratio of the handle fusing surface 12 portion 8 times or less, a method of forming a bottle shape so that the draw ratio of the portion becomes small, or a part of a mold corresponding to the part is used. It can be carried out by a method of lowering the temperature to a temperature lower than that of the other portion to accelerate the solidification by cooling so as not to stretch, a method of blowing cold air to the portion to quickly solidify, or a combination thereof.

The bottle body 10 and the handle 20 are integrated by fusing the handle fusing surface 12 and the smooth surface 23. As described above, the fusion of both is performed by the bottle body 10
Can be blow-molded or the handle 20 can be injection-molded. After the two are separately molded, the handle fusing surface 12 and the smooth surface 23 are heated and fused by an appropriate means. You may let me.

The handle fusing surface 12 and the smooth surface 23
Is usually formed in a vertically long shape in accordance with the shape of the attachment portion 22 of the handle 20, but may be provided over the entire length of the attachment portion 22 or may be provided separately.

The handle fusing surface 12 and the smooth surface 23 are
The area can be set to an appropriate area according to the shapes and sizes of the bottle body 10 and the handle 20, and an auxiliary locking portion may be provided.

[0018]

As described above, in the plastic bottle with the handle of the present invention, the smooth wall of the handle is provided on the innermost wall surface of the recess for mounting the handle of the bottle body, and the inner surface of the handle is provided. Since a smooth surface corresponding to the handle fusion surface is provided on the handle, and the smooth surface is fused to the handle fusion surface, the handle attachment portion of the bottle body does not become thin, and the handle fusion property is improved. The mounting strength can be increased.

Further, since the bottle body and the handle are surface-fused, the fusion strength is improved and deformation of the fused portion due to impact when the bottle is dropped can be reduced, preventing peeling and dropping of the handle. it can.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a plastic bottle with a handle according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the same.

FIG. 3 is a side view of the bottle body on the side where the handle is attached.

[Explanation of symbols]

10 ... Bottle main body 11 ... Recessed portion 12 ... Handle fusion surface 20 ... Handle 21 ... Hand holding portion 22 ... Mounting portion
23 ... Smooth surface

Claims (1)

Claims: 1. A handle mounting recess is formed in the body of a bottle body molded by blow molding of a polyester resin,
In a plastic bottle with a handle in which a handle made of the same kind of resin is attached to the recess, a smooth surface-shaped handle fusion-bonding surface is provided on the innermost wall surface of the handle attaching recess, and the handle is attached to the back of the handle. A plastic bottle with a handle, wherein a smooth surface corresponding to the handle fusion surface is provided, and the smooth surface is fused to the handle fusion surface.