JP2727933B2 - Polyester bottle with vacuum absorption handle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester bottle with a vacuum-absorbing handle, and more particularly, to an irregular or asymmetrical vacuum deformation after hot filling of a content. Also, the present invention relates to a polyester bottle which is effectively prevented in spite of an asymmetric structure by a handle.

[0002]

2. Description of the Related Art Plastic hollow containers are widely used as packaging containers for various liquids because of their excellent lightness and impact resistance. In particular, polyethylene terephthalate (PET) is stretch blow-molded. The hollow container consists of transparency, gas barrier properties, light weight, impact resistance,
It has a combination of appropriate rigidity and the like, and is widely used as a packaging container for containing liquid contents.

[0003] In this stretch blow-molded container, it is required to attach a handle because of its easy handling, but forming the handle integrally with the container in the stretch blow-molding process is based on the principle. Due to the difficulties, several proposals have been made for attaching handles to stretch blow molded containers.

Japanese Utility Model Application Laid-Open No. 3-908 proposed by the present applicant.
Japanese Patent Publication No. 42 is provided with a neck, a body, and a closed bottom integrally formed by blow molding or stretch blow molding of a synthetic resin, and a part of the body has a most concave portion substantially equal to or larger than the neck. A recess provided to have a slightly larger diameter, a projection provided at a substantially center of the recess so as to have a non-circular cross section, a circumferential groove provided around the projection, A container body having a pair of short grooves extending upward and downward from the upper end and lower end of the circumferential groove along the recess, respectively; an endless grip portion integrally formed by injection molding of a synthetic resin; And a handle fixed by inserting the mounting portion into the circumferential groove and inserting the center portion of the mounting portion side end of the grip portion into the short groove.
And a synthetic resin container with a handle.

On the other hand, hot filling of contents is widely used in polyester bottles in order to enhance the preservability of the contents. However, the volume shrinkage of the contents due to cooling causes the container to be deformed under reduced pressure. Always occurs. In order to prevent this, a panel portion is provided on the bottle side wall portion via a pillar portion, and this panel portion absorbs decompression deformation.

[0006]

However, a polyester bottle with a handle has a large bottle volume.
Since the shrink volume is large and the bottle has an asymmetric structure due to the provision of the handle, there is a problem that the shrinkage deformation of the bottle is large, and it is likely to occur in an irregular or asymmetrical form (concave and concave form).

[0007] When such irregularity or asymmetric shrinkage deformation occurs in the bottle, the commercial value of the bottled product is remarkably reduced. Therefore, it is important to disperse and absorb the shrinkage deformation in the container wall so as not to be conspicuous.

Further, in a bottle with a handle, if such a deformation occurs in the attachment portion between the handle and the bottle, the fixation between the handle and the bottle becomes incomplete, and if the rattle occurs or is severe. May be detached, and cracks or the like may be generated on the container wall near the handle attachment portion, causing troubles such as leakage and reduced strength.

[0009] Accordingly, an object of the present invention is to provide a polyester product in which irregular or asymmetric decompression deformation after hot filling (hot packing) of contents is effectively prevented irrespective of the asymmetric structure by the handle. To provide a bottle.

[0010] Another object of the present invention is to reduce the pressure-reduction deformation after hot-packing the contents, regardless of the asymmetric structure by the handle, and to be effectively absorbed by a fixed portion of the container wall. An object of the present invention is to provide a polyester bottle in which fixation between the handle and the bottle is completely maintained and cracks on the container wall near the handle attachment portion are effectively prevented.

[0011]

According to the present invention, there is provided a bottle with a handle provided with a bottle body formed by stretch blow molding of a thermoplastic polyester and a handle made of a thermoplastic resin separate from the bottle body. The bottle body includes an upper body including a handle attachment portion, and a lower body including a label surface, and the upper body has a plurality of decompressed absorption surfaces in a convex shape on the opposite side of the handle attachment portion. It is provided up to the vicinity of the handle mounting part via the connecting part.

The handle mounting portion is formed of a concave portion recessed toward the center of the bottle. Of the plurality of decompression absorbing surfaces, a portion adjacent to the handle mounting concave portion has a reduced width having a wide upper portion and a narrow lower portion. It is good to make a surface.

According to the present invention, there is also provided a bottle with a handle provided with a bottle body formed by stretch blow molding of a thermoplastic polyester and a handle made of a thermoplastic resin separate from the bottle body. Consisting of an upper body including a mounting portion and a lower body including a label surface, the lower body is provided with a plurality of decompression absorbing surfaces in a convex shape on the side opposite to the label surface via a connecting portion. At the boundary between the label surface and the reduced pressure absorbing surface, a protective bending portion for preventing deformation of the label surface is provided.

In the present invention, it is most preferable to provide the above-mentioned reduced pressure absorbing surface on each of the upper body portion including the handle attachment portion and the lower body portion including the label surface. In particular, the handle attachment portion of the upper body portion is preferably provided. It is preferable to form a step at the boundary between the pressure reduction absorbing surface of the lower body and the reduced pressure absorbing surface, and to form a bead at the boundary between the reduced pressure absorbing surface of the upper body and the label surface of the lower body.

[0015]

The polyester bottle with a reduced-pressure absorbent handle of the present invention comprises a bottle body formed by stretch blow molding of a thermoplastic polyester, and a handle made of a thermoplastic resin separate from the bottle body. In the present invention, the bottle body (side wall) is divided into upper and lower parts, and an upper body including a handle attachment part and a lower body including a label surface are provided.

The handle attaching portion is an important part for securely fixing and engaging the handle and the bottle and for holding the bottle, while the label surface is used for securely confirming the product name, type and source of the contents. It is an important part in displaying and increasing the commercial value of the bottled product. Irregularity or asymmetric deformation due to decompression of these parts is not allowed, but in the present invention, the handle mounting part is provided on the upper body part, and the label surface By providing in the lower body, it is possible to provide a decompression absorption surface also in the part other than the handle attachment part of the upper body, and also in the part other than the label surface of the lower body,
Asymmetry or asymmetric deformation due to decompression of the handle attachment portion and the label surface can be prevented.

First, in the upper torso portion having the handle mounting portion, the container wall is asymmetric due to the handle mounting structure, and asymmetric deformation is likely to occur. In the present invention, the upper body portion is provided on the opposite side of the handle mounting portion. In addition, since a plurality of decompression absorbing surfaces are provided in a convex shape to the vicinity of the handle mounting portion via the connecting portion, even if the reduced pressure occurs due to the volume reduction of the contents, the depressurizing absorption of the convex shape is performed using the connecting portion as a fulcrum. Conversely, the panel is deformed so that the surface has a concave shape, and decompression absorption is performed in portions other than the handle attachment portion, and asymmetric deformation of the handle attachment portion is prevented.

The handle mounting portion is formed of a concave portion recessed toward the center of the bottle, so that the handle is close to the center of gravity of the bottle and can be easily gripped even when the contents are fully filled. The advantage of the bottle strength is that, among the plurality of decompression absorption surfaces, the one adjacent to the handle mounting recess has a decompression absorption surface having a wide upper portion and a narrower lower portion. And sealing reliability.

In the bottle with a handle having the above structure, the decompression absorbing surface adjacent to the recess for attaching the handle, particularly the upper portion thereof, is structurally weakest. This tendency can be completely prevented by using a reduced-pressure absorption surface having a wide width and a narrow width at the lower portion.

In the present invention, a plurality of reduced-pressure absorbing surfaces are also provided on the lower body portion on the side opposite to the label surface in a convex shape via a connecting portion. As a result, as in the case of the upper body, the reduced pressure absorption due to the buckling deformation of the reduced pressure absorption surface is performed smoothly.

In the case of the lower body, since the area of the label surface is relatively large and the shape protrudes outward,
It is often difficult to prevent the label surface, especially the edge of the label surface, from being deformed during decompression. In the present invention, a protective bending portion for preventing deformation of the label surface is provided at the boundary between the label surface and the reduced pressure absorbing surface. Thus, the label surface can be maintained in a predetermined surface shape without asymmetric deformation.

In the present invention, it is functionally and aesthetically pleasing that the handle mounting portion of the upper body and the label surface of the lower body are located on opposite sides. By doing so, when the label surface is the front, the handle is the back, which is aesthetically convenient. Along with this, a step is formed at the boundary between the handle attachment portion of the upper body and the decompression surface of the lower body, and the boundary between the decompression surface of the upper body and the label surface of the lower body. To form a bead. This prevents the deformation of the reduced pressure absorbing surface of the lower body from affecting the handle mounting part of the upper body, or the deformation of the reduced pressure absorbing surface of the upper body from affecting the label surface of the lower body. can do.

According to the present invention, the above is combined, and the reduced pressure deformation after hot filling (hot pack) of the contents is as follows:
Despite the asymmetric structure with the handle, it is effectively absorbed at a fixed part of the container wall, preventing unintended asymmetric deformation,
The fixation between the handle and the bottle is completely maintained, and cracks and the like on the container wall near the handle attachment portion are effectively prevented.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A polyester bottle with a handle of the present invention will be described with reference to the drawings.

FIG. 1 is a front view of an embodiment of a polyester bottle with a handle of the present invention, and FIG.
FIG. 3 is a rear view of the bottle of FIG. 4 is a top view of the bottle of FIG. 1, FIG. 5 is a bottom view of the bottle of FIG. 1, and FIG.
It is A sectional drawing. 7 and 8 are cross-sectional views taken along the line BB in FIG. 2. FIG. 7 shows an unfilled state, and FIG. 8 shows a state of reduced pressure after hot filling and sealing.

The polyester bottle with a handle of the present invention comprises:
As shown in FIG. 1 to FIG. 3, the bottle body is generally indicated by 1 and a handle is indicated by 2 as a whole. 1 to 6
, The bottle body 1 is composed of a neck portion 3, a tubular body portion 4, and a closed bottom portion 5, and a frustum-shaped shoulder portion 6 exists between the neck portion 3 and the body portion 4.

The cylindrical body 4 is vertically divided into an upper body 7 and a lower body 8, and the upper body 7 is provided with a handle mounting portion 9. Is provided with a label surface 10.

As shown in FIGS. 2 and 3, the handle mounting portion 9 comprises a concave portion which is recessed from below the frustum-shaped shoulder portion 6 toward the center of the bottle. As viewed from the side, the handle mounting recess 9 hangs down from the shoulder and then extends slightly inclining toward the center of the bottle, the side surface 12 extending substantially vertically, and slightly inclining toward the side of the body. In the embodiment shown in the drawings, the concave side surface 12 has a maximum concave portion which is substantially the same as or slightly larger than the neck portion 3 in horizontal cross section (FIG. 6). ) Is provided in a substantially arc shape.

On the vertical side surface 12 of the recess 9 for attaching the handle,
As shown in FIG. 3 and FIG. 6, a projection indicated by 14 as a whole is provided. The protrusion 14 is formed so that its vertical cross section is non-circular, and in the embodiment shown in the drawings, it is oval, but it can prevent rotation of the handle in combination with the handle described later in detail. Any shape may be used as long as the shape is, for example, an ellipse, an oval, a triangle, a square,
It may be a pentagon or another polygon. The protrusions 14 are formed integrally with the handle mounting recess 9 and other parts of the bottle body by stretch blow molding, but as shown in the cross-sectional view of FIG. A portion 15, a flange portion 16 which is located at the distal end of the tubular portion 15 and which is increased in size in the transverse direction to form a flange, and a distal end surface 17 which is closed at the flange portion, are hollow inside. .

As shown in the cross section of FIG. 6, a circumferential groove 18 is formed at the base of the projection 14 so that the handle 2 can be fixed more firmly.

As shown in FIGS. 2 and 3, the handle 2 of the bottle of the present invention is separate from the bottle, and is an endless grip 20 integrally formed by injection molding of synthetic resin.
And the mounting portion 21. The grip portion 20 has vertical portions 22 in which irregularities for preventing slippage are alternately arranged at small intervals inside, and is connected to a ring-shaped mounting portion 21 via an upper curvature portion 23 and a lower curvature portion 24. Have been. The ring-shaped mounting portion 21 has a shape similar to that of the bottle main body protrusion 14 and has an inner peripheral dimension substantially equal to the outer peripheral dimension thereof, and as shown in FIG. It is embedded so that the fixed engagement between the two is ensured.

The handle 2 is provided with a projection 25 for locking and stabilizing above the upper curvature portion 23 and a projection 26 for locking and stabilizing below the lower curvature portion 24. The handle attachment portion upper surface 11 and the handle attachment portion lower surface 13 are engaged with each other. From FIG. 3, it will be appreciated that the handle 2 does not substantially protrude beyond the outer surface of the bottle body.

In the present invention, the upper body 7 is provided with a plurality of reduced pressure absorbing surfaces 27 in a convex shape on the opposite side of the recess 9 for attaching the handle to the vicinity of the handle attaching portion via the connecting portion 28. The decompression absorption surface 27 is generally a quadrilateral having an area, while the connecting portion is in the form of a narrow rib. As shown in FIG. 6, it is important for the decompression absorbing surface 27 to have a convex shape, that is, a shape in which the central portion protrudes radially outward in order to perform decompression absorption by buckling.

In a preferred embodiment of the present invention, of the plurality of reduced-pressure absorbing surfaces 27, one 27a adjacent to the handle mounting recess 9 is
The upper part has a wide width and the lower part has a narrow width as a reduced pressure absorbing surface. The detailed structure of the reduced-pressure absorbing surface 27a will be better understood with reference to FIGS. As in the present invention, a handle mounting recess is formed, and in a container having an asymmetric structure, the weakest portion structurally during decompression deformation is a connection portion between the handle mounting recess where stress tends to concentrate and the decompression absorbing surface,
In particular, by introducing a reduced-pressure absorbing surface 27a having a wide width at the upper portion and a narrow width at the lower portion of the connection portion, stress distribution can be measured.

In the specific example shown in FIG.
Are provided on the front, these are compared to the upper side,
It is a long quadrilateral with a lower side. If the dimension in the width direction of the reduced-pressure absorbing surface 27 is small, the volume that can be absorbed by the deformation from the convex surface to the concave surface becomes small. Therefore, the width should be as large as possible without affecting the appearance and function of the bottle. is there.

As an example, the average dimension in the width direction of the reduced-pressure absorbing surface 27 is preferably in the range of 40 to 60 mm, particularly 45 to 55 mm, while the ratio of the projecting dimension from both ends of the central portion of the reduced-pressure absorbing surface 27 (projecting (Height / width) should be in the range of 0.02 to 0.08, especially 0.04 to 0.06. If the width and protrusion ratio are smaller than the above range,
If the reduced-pressure absorption is not sufficient, and if it is larger than the above range, asymmetric deformation may occur at the time of reduced-pressure absorption or the appearance of the subsequent container may be deteriorated. It is preferable that the dimension in the height direction of the reduced-pressure absorbing surface 27 is equal to or larger than the dimension in the width direction.

The width of the connecting portion 28 is 0 to 5 mm,
In particular, it is preferably in the range of 2 to 3 mm. When the width is smaller than the above range, the shaping property of the reduced pressure absorbing surface is deteriorated. Become buckled.

It is effective to prevent the asymmetric deformation by connecting the connecting portion 28 and the shoulder portion 6 with each other at the vertex as a cut surface or providing a relatively large R. As an example, the size of R is preferably in the range of 6R to 12R.

According to the present invention, the label surface 10
A plurality of decompression absorbing surfaces 29 are provided on the opposite side to the convex shape and connected via the connecting portion 30, and the label surface 10 and the decompression absorbing surface 29 are provided.
Is provided with a protective bent portion 32 for preventing deformation of the label surface 10.

As in the case of the upper body 7, the reduced pressure absorbing surface 29
Is generally a quadrilateral with an area, while the connecting part 30 is in the form of a narrow rib. As shown in the cross-sectional view of FIG. 7, the decompression absorbing surface 29 has a convex shape, that is, a shape in which a central portion protrudes radially outward, and as shown in FIG. Decompression absorption occurs (this is the same for the decompression absorption surface 27 of the upper body 7).

As shown in FIG. 7, the protective bending portion 32
A curved portion that also serves as a step between the relatively large-diameter label surface 10 and the relatively small-diameter boundary portion 31, and has an outwardly convex curvature portion on the label surface 10 side and an inwardly convex portion on the boundary portion 31 side. Are obliquely connected to each other via the curvature section of the above.

The operation of the protective bend 32 is also shown in FIG. 8, and when the pressure is reduced, the protective bend 32 is depressed inward so that the label surface 10 projects radially outward. The balance is maintained by the force acting inside the diameter of the label 10, and the deformation of the label surface 10 is prevented.

In the specific example shown in the figure, three decompression absorption surfaces 29 of the lower body 8 are provided on the back surface, and these are right-angled quadrilaterals.

The reduced pressure absorbing surface 29 and the connecting portion 30 of the lower body 8
Is preferably in the same range as that of the upper body 7 for the reason described above. The dimensions of the protective bends 31 and 32 are such that the radial step is 2 to 6 mm, especially 3 mm.
It is preferable that the total width of one side in the circumferential direction is in the range of 10 to 40 mm, particularly 25 to 35 mm.

As shown in FIGS. 1 to 3, the handle mounting portion 9 of the upper body 7 and the label surface 10 of the lower body 8 are located on opposite sides. By doing so, when the label surface 10 is at the front, the handle 2 is at the back, and the handle 2 is hidden, which is aesthetically convenient.

In order to prevent the influence of the decompression deformation of the upper body 7 and the lower body 8, the handle mounting part 9 of the upper body 7 and the lower body 8
A reinforcing step 33 is formed at the boundary between the pressure-absorbing surface 29 and the pressure-absorbing surface 27 of the upper body 7 and the label bead 34 at the boundary between the label surface 10 of the lower body 8. .

In the reinforcing step 33, the deformation of the reduced-pressure absorbing surface 29 of the lower body 8 is caused by the handle mounting portion 9 of the upper body 7, especially the lower surface 13,
It propagates to the vertical mounting surface 12 that follows it and prevents this from being dented. Further, the reinforcing beads 34 prevent the deformation of the decompression absorbing surface 27 of the upper body 7 from affecting the label surface 10 of the lower body 8.

The bottle of the present invention is used for hot filling an internal product and sealing it as it is. A screw 35 for opening and closing the cap, a step 36 for fastening the pill fur proof cap, and the like are provided on the neck 3 of the bottle in order to seal the internal contents. A support ring 37 for supporting is provided. Also,
The bottom 5 has a dome shape in which the center is higher than the ground contact surface, and the bottom 5 is provided with an engagement recess 38 for positioning the bottle and preventing its rotation.

The polyester bottle with a handle of the present invention is manufactured by the following method. A method in which the handle 2 is manufactured in advance by injection molding, the handle is inserted into a blow mold, and the preform for the bottle body is stretch blow-molded in the blow mold (insert blow molding method), or A method in which a preform for a bottle main body is stretch blow-molded in a blow mold to produce a bottle main body 1, and the bottle main body 1 is inserted into an injection mold and a resin for a handle is injection-molded (insert injection molding method). ).
The former method is preferred.

In the polyester bottle with handle of the present invention, the bottle body 1 is made of thermoplastic polyester.
Examples of the thermoplastic polyester include thermoplastic polyesters mainly composed of ethylene terephthalate units, for example, polyethylene terephthalate (PET), and a small amount of other glycols such as hexahydroxyrylene glycol as a glycol component, or isophthalic acid as a dibasic acid component. So-called modified PET containing a small amount of other dibasic acid components such as hexahydroterephthalic acid and the like is used. These polyesters can be used alone or in the form of a blend with other resins such as small amounts of nylons, polycarbonates or polyarylates, as long as the nature thereof is not impaired.

The intrinsic viscosity (η) of the thermoplastic polyester used may be a bottle forming grade, and is 0.65 dl /
g, especially 0.70 to 0.90 dl / g, and the content of diethylene glycol unit is 1.60.
Those within the range of not more than 1.50% by weight, especially not more than 1.50% by weight are preferably used.

The bottomed preform used for the stretch blow molding can be prepared by any method known per se, for example, injection molding,
It is manufactured by a pipe extrusion method or the like. In the former method, molten polyester is injected, and a preform with a bottom and a neck corresponding to the final container is manufactured in an amorphous state. In the latter method, an extruded amorphous pipe is cut, a mouth and a neck are formed at one end by compression molding, and the other end is closed to form a bottomed preform. In general, it is preferable to manufacture by an injection molding method. Injection conditions and the like are not particularly limited, but generally, a bottomed preform can be molded at an injection temperature of 260 to 300 ° C. and an injection pressure of 30 to 60 kg / cm ² .

The preform thus obtained has heat resistance,
In order to provide rigidity, in the preform stage, the mouth and neck having a screwing portion, a fitting portion, a support ring, etc. may be crystallized and whitened by heat treatment. After the molding is completed, the mouth and neck portion of the unstretched portion may be crystallized and whitened.

The preform to be stretch blow-molded is preheated to a stretching temperature, typically 100 to 130 ° C., and then biaxially stretched. A preform of the thermoplastic polyester preheated to the above temperature is mounted in the hollow mold, and the preform is expanded and stretched in the circumferential direction and stretched and stretched in the axial direction.

The stretching ratio in the final container is suitably from 5 to 14 times, particularly from 7 to 12 times in area ratio, while the stretching ratio in the axial direction is from 2 to 3.5 times, especially from 2.5 to 3 times. The draw ratio in the circumferential direction is preferably 2 to 5 times, and more preferably 3 to 4 times.

As the handle 2, any thermoplastic resin that can be injection-molded can be used. As such a resin, polyethylene terephthalate (PE
T), thermoplastic polyesters such as polybutylene terephthalate; polycarbonates; acryl-butadiene-
Styrene copolymer (ABS resin); polyacetal resin; nylons such as nylon 6, nylon 66, and their copolymerized nylons; acrylic resins such as polymethyl methacrylate; isotactic polypropylene; Examples thereof include medium- or high-density polyethylene, ethylene-propylene copolymer, ethylene-butene-1 copolymer, and styrene-butadiene thermoplastic elastomer. Handle molding resin includes
Naturally, various coloring agents, fillers, and the like can be blended.

Example 1. Using a preform made of polyethylene terephthalate (PET) and a handle made of polypropylene, a handle-equipped bottle having a shape shown in FIGS. The dimensions of each part are as follows.

PET basis weight 85 g, caliber 36 mm, total height 321.5 mm, trunk maximum diameter 109 mm, handle (hand insertion part) height 82 mm, radial dimension 22 mm, upper trunk decompression absorption surface 27 arrangement Three on half circumference Upper edge width 40.8mm Lower edge width 52.8mm Height 88.6mm, Upper trunk connecting part 282mm, Label surface (sticking surface) Height 112.3mm, Width 102.4mm, Lower trunk decompression absorbing surface 29 Arrangement Three in half circumference, height 101.5mm, width 52.8mm, lower trunk connection part 302mm,

The bottle was filled with 1.8 liters of sake and cooled to 5 ° C. and 15 ° C. after filling. The volume loss after cooling was 58 ml at 5 ° C and 49 ml at 15 ° C.
Almost no swelling of the bottle during filling was observed.

As a result of observing the bottle after cooling, the reduced pressure was completely absorbed by the reduced pressure absorbing surfaces of the upper and lower body portions of the bottle, and no irregular deformation was recognized at the concave portion for attaching the handle and the label surface. . In the case of cooling at 5 ° C., when the cooling pressure is 5 ° C., the depressurized absorbing surface of the lower trunk portion retreats inward by 5.6 mm in diameter.
It was inverted to a concave shape.

Example 2 Using a polyethylene terephthalate (PET) preform and a polypropylene handle, a handle-equipped bottle having a 2.7-liter internal volume as shown in FIGS. 1 to 8 was produced. The dimensions of each part are as follows.

PET basis weight 110 g, caliber 36 mm, overall height 356 mm, trunk maximum diameter 128 mm, handle (hand insertion part) height 87.5 mm, radial dimension 22.0 mm, upper trunk depressurization absorbing surface 27 disposed 3 in half circumference Pcs, upper edge width 42.0mm lower edge width 60.1mm height 89.3mm, upper trunk connecting part 28 label surface (sticking surface) height 124.9mm, width 122.7mm, lower trunk decompression absorbing surface 29 Arrangement 3 in half circumference, upper edge 60.1mm lower edge 61.6mm height 98mm, lower trunk connecting part 28

The bottle was filled with 2.7 liters of sake and cooled to 5 ° C. and 15 ° C. after filling. The volume loss after cooling was 88 ml at 5 ° C and 74 ml at 15 ° C.
Almost no swelling of the bottle during filling was observed.

As a result of observing the bottle after cooling, the reduced pressure was completely absorbed by the reduced pressure absorbing surfaces of the upper and lower body portions of the bottle, and no irregular deformation was recognized at the concave portion for attaching the handle and the label surface. . In the case of cooling at 5 ° C., the depressurization absorbing surface of the lower body portion has a convex shape receding inward by 6.2 mm in diameter,
It was inverted to a concave shape.

[0065]

According to the present invention, there is provided a polyester with a vacuum-absorbing handle having a bottle body formed by stretch blow molding of a thermoplastic polyester and a handle made of a thermoplastic resin separate from the bottle body. In the bottle, the bottle main body (side wall) is divided into upper and lower parts, and the upper body including the handle attachment part and the lower body including the label surface, other than the upper body part other than the handle attachment part and the label surface At least one or both of the lower torso portions are provided with a decompression absorption surface via a connecting portion, so that the contents are hot-filled (hot pack)
Decompression deformation after the removal is effectively absorbed at a fixed part of the container wall, despite the asymmetric structure by the handle, preventing unintended asymmetric deformation and completely maintaining the grip and the bottle fixed. Further, cracks and the like on the container wall in the vicinity of the handle attachment portion were also effectively prevented.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a polyester bottle with a handle of the present invention.

FIG. 2 is a side view showing the bottle of FIG. 1 rotated by 90 °.

FIG. 3 is a rear view of the bottle of FIG. 1;

FIG. 4 is a top view of the bottle of FIG. 1;

FIG. 5 is a bottom view of the bottle of FIG. 1;

FIG. 6 is a sectional view taken along line AA in FIG. 2;

FIG. 7 is a schematic sectional view taken along the line BB in FIG. 2, showing an unfilled state.

FIG. 8 is a schematic cross-sectional view taken along the line BB in FIG. 2, showing a state where the pressure is reduced after hot filling and sealing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bottle main body 2 Handle 3 Neck 4 Cylindrical trunk part 5 Closed bottom part 6 Frustum-shaped shoulder part 7 Upper trunk part 8 Lower trunk part 9 Handle attachment part 10 Label surface 11 Upper surface of handle attachment recess 12 Side surface 13 Lower surface 14 Handle attachment Projecting portion 15 Small cylindrical portion 16 Flange portion 17 Tip surface 18 Peripheral groove 20 Endless gripping portion 21 Mounting portion 22 Vertical portion of gripping portion 23 Upper curvature portion 24 Lower curvature portion 25 and 26 Locking stabilization Projection 27 and 27a Decompression absorption surface of upper torso 28 Connection part of upper torso 29 Decompression absorption surface of lower torso 30 Connection part of lower torso 31 Boundary part 32 Bending part for protection of lower torso 33 Reinforcing Step 34 Reinforcement bead 35 Screw for opening and closing the cap 36 Step for fastening 37 Support ring 38 Engagement recess for positioning

Claims (6)

(57) [Claims] 1. A bottle with a handle, comprising: a bottle body formed by stretch blow molding of a thermoplastic polyester; and a handle made of a thermoplastic resin separate from the bottle body.
The bottle body includes an upper body portion including a handle attachment portion, and a lower body portion including a label surface, and the upper body portion has a plurality of decompression absorption surfaces having a convex shape on the opposite side of the handle attachment portion. A vacuum-absorbing polyester bottle with a handle, wherein the bottle is provided to the vicinity of the handle mounting portion via a connecting portion. 2. The handle mounting portion comprises a concave portion recessed toward the center of the bottle, and among the plurality of decompression absorbing surfaces, one adjacent to the handle mounting concave portion has a wide upper portion and a narrow lower portion. 2. The pressure-reducing surface of claim 1.
Polyester bottle with reduced pressure absorbable handle as described. 3. A bottle with a handle provided with a bottle body formed by stretch blow molding of a thermoplastic polyester and a handle made of a thermoplastic resin separate from the bottle body.
The bottle body includes an upper body portion including a handle attachment portion, and a lower body portion including a label surface, and the lower body portion is connected to a plurality of decompression absorption surfaces on a side opposite to the label surface in a convex shape. A protective bent portion for preventing deformation of the label surface is provided at a boundary between the label surface and the reduced-pressure absorbing surface. 4. A bottle with a handle, comprising: a bottle body formed by stretch blow molding of a thermoplastic polyester; and a handle made of a thermoplastic resin separate from the bottle body.
The bottle body includes an upper body portion including a handle attachment portion, and a lower body portion including a label surface, and the upper body portion has a plurality of decompression absorption surfaces having a convex shape on the opposite side of the handle attachment portion. A plurality of decompression absorption surfaces are provided on the lower body portion through a connection portion on a side opposite to the label surface, and the label surface and the decompression absorption surface are provided on the lower body portion through a connection portion. A protective bent portion for preventing deformation of the label surface is provided at the boundary between the polyester bottle and the polyester bottle with a reduced-pressure absorbent handle. 5. The handle mounting portion comprises a concave portion recessed toward the center of the bottle, and among the plurality of reduced-pressure absorbing surfaces, one adjacent to the handle mounting concave portion has a wide upper portion and a narrower lower portion. 5. The pressure-reducing surface of claim 4,
Polyester bottle with reduced pressure absorbable handle as described. 6. A step is formed at the boundary between the handle mounting portion of the upper body and the reduced pressure absorbing surface of the lower body, and the boundary between the reduced pressure absorbing surface of the upper body and the label surface of the lower body. 4. The polyester bottle with a reduced-pressure absorbent handle according to claim 3, wherein a bead is formed in the portion.