WO2008018546A1

WO2008018546A1 - In-mold label container

Info

Publication number: WO2008018546A1
Application number: PCT/JP2007/065621
Authority: WO
Inventors: Tsutoo Yamada; Rui Mihara; Mitsuru Kanai; Toshiyuki Sano
Original assignee: Dai Nippon Printing Co., Ltd.
Priority date: 2006-08-09
Filing date: 2007-08-09
Publication date: 2008-02-14
Also published as: TW200829422A; CN101500782B; TWI403406B; KR101562405B1; KR20090038489A; CN101500782A; JPWO2008018546A1; JP5577594B2

Abstract

An in-mold label container which is formed by biaxial stretching blow molding and free from wrinkles on a label, and allows the label to be easily pasted over the entire outer-periphery side surface of the container even in the case of a thin-walled container. The container is characterized by being provided with a tubular container body formed by biaxial stretching blowing, and an in-mold label extending over at least 180° along the outer-periphery side surface of the container body.

Description

Specification

In-mold label container

Technical field

The present invention relates to an in-mold label container formed by biaxial stretch blow molding, and more specifically, an in-mold label container including an in-mold label that extends over 180 ° along the outer peripheral side surface of the container body. About.

Background art

[0002] In-mold label molding is a molding method in which a label is set on a mold in advance during blow or injection molding, and the resin and the label are fused together during resin formation to integrally form and label. It is. For example, Japanese Patent Laid-Open Nos. 2-184884 and 3-251437 disclose plastic containers in which in-mold labels are provided on the outer periphery of the side surface of the container by direct blow hollow molding. However, in a plastic container obtained by biaxial stretch blow molding, no in-mold label has been provided on the entire outer periphery of the side surface of the container until now.

On the other hand, blown or injection molded plastic containers have been used as food containers. For containers filled with food, etc., labels are often affixed to the outer peripheral side of the container in order to describe the details of its contents or increase the commercial value. A plastic container obtained by biaxial stretch blow molding has a good container appearance! The label is attached to the outer peripheral surface of the container by attaching a tack label after the container is formed. It was.

[0004] Also, Japanese Patent Laid-Open No. 5-338018 proposes, as an example, a method in which a single-sheet label previously sealed in a cylinder is opened in a mold, and a preform is attached to the mold. Yes.

Incidentally, in recent years, from the viewpoint of environmental protection and the like, there has been a demand for a reduction in the amount of resin used in a container, that is, a thinner container.

Disclosure of the invention

Problems to be solved by the invention [0006] However, if a tack label is to be attached to a thin plastic container, the container may be deformed due to the thin container thickness, making it difficult to attach the label.

[0007] In addition, when a label is attached to the entire outer peripheral side surface of the container, wrinkles or the like may occur on the label, which may be undesirable in appearance.

[0008] Further, when a label is attached to the outer peripheral side surface of the container, a step is generated between a portion where the label is present and a portion where the label is not present.

[0009] Further, in the method proposed in Japanese Patent Application Laid-Open No. 5-338018, since the area to which the label is attached is limited, the label cannot be covered over the entire area of the cylinder. There were also problems such as the need to form a cylindrical label.

On the other hand, it is not easy to insert and hold a label having a length sufficient to cover the entire circumference of the side surface of the container into the blow mold, and the method described in the above-mentioned JP-A-5-338018. Therefore, a biaxial stretch blow-molded container with a label covering the entire circumference of the cylinder side of the blow-molded container, including the height direction of the cylinder, has not been developed yet!

[0011] The present invention has been made in consideration of such points, and the label does not generate wrinkles and the label can be easily attached to the entire outer peripheral side surface of a thin container. An object of the present invention is to provide an in-mold label container formed by biaxial stretch blow molding or injection blow molding.

Means for solving the problem

[0012] The present invention includes a cylindrical container body formed by biaxial stretch blow, and an in-mold label extending over 180 ° along the outer peripheral side surface of the container body. It is an in-mold label container formed by axial stretch blow molding.

[0013] As a preferred embodiment of the present invention, it extends over 360 ° or more along the outer peripheral side surface of the in-mold label force container main body.

[0014] Further, as a more preferred embodiment of the present invention, the in-mold label force extends over 365 ° along the outer peripheral side surface of the container main body.

[0015] Further, as a preferred embodiment of the present invention, an overlapping force between one end of the in-mold label and the other end is about 5 mm to 5 mm.

[0016] As another aspect of the present invention, there is a gap between one end of the in-mold label and the other end. 0 to 5 mm.

[0017] The in-mold label container according to the present invention is preferred! / As an aspect, there is no step between the outer peripheral surface of the lid part and the outer peripheral side surface of the container body, the opening shoulder of the container body being combined with the container body. The body and the lid are molded so as to be fitted.

[0018] Further, as a preferred embodiment of the present invention, the container main body is a polyethylene resin, a polypropylene resin, a random copolymer obtained by random copolymerization of propylene and ethylene, or a block obtained by block copolymerization of propylene and ethylene. Copolymer or a mixed resin of polypropylene and polyethylene, which is powerful.

[0019] Further, as a preferred embodiment of the present invention, the in-mold label force S has a multilayer structure.

[0020] Further, as a preferred embodiment of the present invention, the in-mold label includes a barrier layer as an intermediate layer.

[0021] In a preferred embodiment of the present invention, the barrier layer is a silica vapor deposition layer, an aluminum oxide vapor deposition layer, an aluminum vapor deposition layer, or an aluminum foil layer.

[0022] As a preferred embodiment of the present invention, the thickness of the outer peripheral side surface of the container body is 200 to 800 m.

[0023] Further, as a preferred aspect of the present invention, when a gap is formed between one end and the other end of the in-mold label, each end edge is inclined with respect to the blow molding stretching direction of the container. It is formed to do.

[0024] Further, in the present invention, the gap formed between one end and the other end of the in-mold label is preferably zigzag or wavy.

[0025] An in-mold label container according to the present invention holds a plurality of blow molds and a rotatable rotary table, and a label holder that winds and holds the labels and supplies the labels into the blow molds of the rotary table. A preform holding / feeding section that holds the preform and that fits into the blow mold of the rotary table and feeds the preform into the blow mold;

An air blowing device connected to a preform holding and feeding unit that fits into a blow mold of a rotary table; Equipped with a preform set in the preform holding and feeding part, a blow mold clamping device that closes the preform holding and feeding part and the blow mold from the left and right, and the label holding core can be inserted into the blow mold. The container is molded using a container blow molding system characterized in that a recess is provided on one side of the cylindrical body to receive both ends of the label. .

[0026] Further, as another aspect of the present invention, there is provided a combination of the in-mold label container and the lid.

The invention's effect

[0027] According to the present invention, since the label is provided on the outer peripheral side surface of the container by in-mold molding, wrinkles or the like do not occur on the label.

[0028] Even when the container is thin, a label can be provided on the outer peripheral side surface of the container without difficulty in label sticking due to container deformation.

[0029] Further, when a label is provided on the outer peripheral side surface of the container, a step does not occur between the portion with the label and the portion without the label. In addition, since the label force is provided by S-in-molding, the label does not peel off when the container is used.

[0030] Also, the in-mold label container according to the present invention is formed so as to be inclined with respect to the resin flow direction during injection molding of each edge force container of the in-mold label. The container is not damaged along the gap between the labels.

Brief Description of Drawings

FIG. 1 is a side sectional view of an in-mold label container of the present invention.

2 is a cross-sectional view of the container shown in FIG.

FIG. 3 is a cross-sectional view of a container provided with a tack label on a side surface.

FIG. 4 is a cross-sectional view of a container according to another embodiment of the present invention.

FIG. 5 is an enlarged cross-sectional view of a container according to another embodiment of the present invention.

FIG. 6 is a side view of the in-mold label container of the present invention.

FIG. 7 is a side view of an in-mold label container according to another embodiment of the present invention.

FIG. 8 is a side view of an in-mold label container according to another embodiment of the present invention.

FIG. 9 is a schematic view showing a container blow molding system according to the present invention. 10] An overall plan view showing a container blow molding system according to the present invention.

FIG. 11 is a side view showing a supply table for holding a label holding core and a label forming supply unit.

FIG. 12 is a plan view showing a supply table for holding a label holding core and a label forming supply unit.

FIG. 13 is a side view showing a rotary table that holds a blow mold.

FIG. 14 is a plan view showing a rotary table that holds a blow mold.

FIG. 15 is a side sectional view showing a blow mold.

FIG. 16 is a perspective view showing a label holding core.

17] A perspective view showing another embodiment of a label holding core.

18] A sectional view showing the label holding core.

19] A cross-sectional view showing another embodiment of a label holding core.

FIG. 20 is a partially enlarged side sectional view of a combination of an in-mold label container and a lid.

21] A side sectional view of an in-mold label container according to another embodiment of the present invention.

22] A sectional view of an in-mold label container according to another embodiment of the present invention.

Explanation of symbols

1 Blow molding container

2 Container body

2a preform

3 Labenole

3a end

3b Overlap

4 steps

5 opening

6 Open shoulder

7 peripheral side

10 Container blow molding system

11 Rotating table

12 Blow molding part

13 Supply table 15 Preform molding part

16 Preform cooling section

17 Gate cut part

18 Heating section

20 Label holding core

20a Adsorption part

20b, 20c Small cylindrical part

20d recess

20e cylindrical label holding core

20f Label suction hole

21 Label molding supply department

22 Label fabric

23 Slitter

24 Label cutting part

25 Receiver

26 Lever

40 blow mold

140 Blow mold clamping mold

41 Preform holder

43 Air blowing device

50 lids

51 Retaining ring

52 Upper plate

53 Side plate

54 Inner ring

55 Contact ring

BEST MODE FOR CARRYING OUT THE INVENTION In-mold label container An embodiment of an in-mold label container according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a side sectional view of the in-mold label container of the present invention. The in-mold label container 1 includes a cylindrical container body 2 formed by biaxial stretching blow, which will be described below, and an in-room label 3 that extends over 180 ° along the outer peripheral side surface of the container body. FIG. 2 shows a side cross section of the container shown in FIG. In the present invention, as shown in FIG. 2, since the label 3 is in-mold molded and is integrally attached to the side surface of the container body 2 when the container is molded, a conventional tack label 3 ′ as shown in FIG. Compared to the container provided on the side, there is almost no step 4 between the label's both ends (the label is provided! /, NA! /, Part) and the label part on the container surface side.

As shown in FIG. 4, the in-mold label is preferably provided so as to extend over 360 ° or more, preferably over 365 ° along the outer peripheral side surface of the container body. In this way, the gas barrier property of the biaxially stretched blow-molded container 1 as a whole is improved by using the label 3 having a high gas-nore property by being wrapped at 360 ° or more, that is, the label is wound around the entire side surface of the container. Can do.

[0036] When a label is provided over 360 ° or more, the overlapping portion 3b at both ends of the label 3 is preferably 2 to 5 mm. In this case, at both end portions where the labels overlap, one front surface and the other back surface are heat-sealed. In this way, by forming the in-mold label so that both end portions of the label overlap each other, the label is further peeled and the label is attached around the entire side of the container, which is also preferable in terms of product appearance It becomes. On the other hand, if the overlap of both ends of the label exceeds 5 mm, it is difficult to attach the label.

[0037] In the case where the back surface and the front surface of the label are not heat-sealed! /, It is necessary to perform in-mold label forming so that both ends of the label do not overlap. In this case, the force required to provide the label over 180 to 360 ° In the present invention, in-mold label molding is performed so that the gap force between one end of the in-mold label and the other end is 5 to 5 mm. Preferably to do

[0038] By the way, when a gap is formed between one end and the other end of the in-mold label as described above, the direction of the gap and the resin flow direction at the time of injection molding of the container match. Have And a crack may arise in a clearance gap part by the impact by a container dropping.

In the in-mold label molding, a step is formed between the resin portion 3c (the portion without the label) and the label portion 3 of the container as shown in FIG. In addition, a slight depression is formed on the inner wall side of the container resin portion as compared with the portion with the label. Therefore, when a drop impact is applied to the container, a crack 8 may occur from the corner of the step to the depression. In particular, when the edge force of the in-mold label is formed along the resin flow direction at the time of injection molding of the container, the container tends to crack along the edge due to the flow orientation generated in the resin flow direction.

In the present invention, as shown in FIG. 6, the edge of the label is formed so as to be inclined with respect to the resin flow direction B at the time of injection molding of the container. Thus, by preventing the resin flow direction at the time of injection molding of the container and the edge direction (label gap) of the label from matching, the occurrence of cracks can be suppressed even when subjected to a drop impact. For example, as shown in FIGS. 7 (a) and (b), the gap between the edges of the label may be formed in a zigzag shape, and as shown in FIGS. 8 (a) and (b). Alternatively, a wavy line may be formed.

[0041] If the in-mold label is provided so as to extend over 360 ° C along the outer peripheral side surface of the container body, the resin part (the part without the label) does not exist. Since the step with the part is eliminated, the generation of cracks due to drop impact is suppressed.

[0042] A method for producing an in-mold label container obtained by such biaxial stretch blow molding will be described in detail below with reference to the drawings.

[0043] First, a container blow molding system used for producing the in-mold label container of the present invention will be described.

[0044] As shown in Fig. 9 (a), a preform molding section having preform molding dies 15a, 15b

In 15, a polypropylene preform 2a is formed.

[0045] The preform 2a molded in the preform molding unit 15 is then held by a preform holder 41. The preform holder 41 is held by the carrier 42 and is transported. In this case, the preform holder 1 and the carrier 42 are used to hold the preform holder 1

9 is constructed (Figure 10). [0046] The preform holder 41 holding the preform 2a is transported to the heating unit 18 by the transport body 42, and the preform 2a is heated in the heating unit 18 (FIG. 9 (b)).

Next, with respect to the preform 2 a held by the preform holder 41, the blow mold 40 is lowered at the blow molding section 12, and the preform holder 41 is inserted into the blow mold 40. . In this case, in the blow mold 40, the label 3 is supplied in advance by a label holding core 20 described later (FIG. 9 (c)).

Next, as shown in FIG. 9 (d), the air blowing device 43 rises from below with respect to the preform holding body 41 inserted into the blow mold 40 located in the blow molding portion 12. approach. In this way, the air blowing device 43 is connected to the preform holding body 41, air is supplied from the air blowing device 43 into the preform 2a, and the preform 2a is moved into the blow mold 40 by the air thus supplied. The blow molded container 1 is formed. At this time, in the blow mold 40, the blow molded container 1 comprising the container body 2 made of the preform 2a and the label 3 wound around the entire side surface of the container body 2 is formed by biaxial stretch blow molding. The

[0049] Next, the blow mold 40 is lifted from the preform holder 41, and thus, the blow molded container 1 having the label 3 on the preform holder 41 is obtained (FIG. 9 (e)).

[0050] The container biaxially stretched blow molding system 10 used in the present invention is held by the plurality of blow molds 40 described above, and the rotatable rotary table 11 and the label 3 are wound and held. 11 is a preform for holding the label 3 in the blow mold 40 and the blow mold 40 that holds the preform 2a and is positioned in the blow molding portion 12 of the rotary table 11. A preform holding body 41 for supplying 2a into the blow mold 40, and an air blowing device 43 that can be connected to the preform holding body 41 fitted to the blow mold 40 located in the blow molding portion 12 of the rotary table 11. It is equipped with! /, Ru (Fig. 10).

[0051] Further, on the upstream side of the turntable 11, a preform molding portion 15 including a pair of preform molding dies 15a and 15b for molding the preform 2a is provided. On the downstream side of the preform molding section 15, a preform cooling section 16 for cooling the preform 2a molded by the preform molding section 15, and a preform cooled by the preform cooling section 16 A gate cut portion 17 for cutting the gate 2a is sequentially provided.

[0052] The preform 2a cooled in the preform cooling section 16 and gate-cut in the gate cut section is held by a preform holding body 41, and the preform holding body 41 is transferred to the heating section 18 by the transport body 42. Be transported. The preform holding body 41 and the conveying body 42 constitute a preform holding / supplying unit 19.

The preform 2 a held by the preform holder 41 is conveyed to the heating unit 18 and heated by the heating unit 18. Thereafter, the preform holder 41 holding the preform 2a is conveyed to the rotary table 11.

Incidentally, the blow mold 40 held by the rotary table 11 is supplied with the label 3 held by the label holding core 20 in the force blow mold 40 conveyed along with the rotation of the rotary table 11. It has become so.

That is, the supply table 13 is rotatably provided near the rotary table 11, and the label holding core 20 is held on the supply table 13. On the opposite side of the supply table 13 from the rotary table 11, a label forming supply unit 21 for forming and supplying the label 3 is disposed.

Next, the supply table 13 for holding the label holding core 20 and the label forming supply unit 21 will be described with reference to FIGS. 11 and 12.

A supply table 13 is provided in the vicinity of the turntable 11, and a label forming supply section 21 for forming and supplying the label 3 on the opposite side of the supply table 13 from the turntable 11 is provided.

[0058] The label forming supply unit 21 includes a label original supply unit 28 for supplying the label original fabric 22, a guide roller 31 for guiding the label original fabric 22 supplied from the label original supply unit 28, and a guide opening. A slitter 23 is provided on the downstream side of the roller 31 and slits in the conveying direction of the label original fabric 22 to form a plurality of elongated strips, for example, four strip-shaped label original fabrics 22, and provided downstream of the slitter 23. And a label cutting part 24 for forming the label 3 by cutting the label original fabric 22

[0059] Further, a clamp 33 that grips the original label 22 is provided on the downstream side of the label cutting section 24, and a label formed by the label cutting section 24 is provided below the label cutting section 24 and the clamp 33. A receiving part 25 for receiving the bell 3 is provided. In this label cutting part 24, the label cutting edge is appropriately selected, and the cutting edge part of the label is made wavy or zigzag shaped with a force S.

Further, the receiving portion 25 can be rotated by a lever (rotating mechanism) 26 so that the label 3 held in the horizontal direction can be erected in the vertical direction. That is, the lever 26 is rotatably attached to a moving body 27 that is held by a base 35 so as to be movable in the width direction, and the receiving portion 25 that receives the label 3 is rotated from a horizontal position to a vertical position. Can do.

Of these, the label supply unit is configured by the moving body 27, the lever 26, and the receiving unit 25 on the base 35, and the label forming unit is configured by the clamp 33 and the label cutting unit 24.

[0062] Further, a label holding core 20 is mounted on the supply table 13, and four label holding cores 20 are provided on one side of the supply table 13 and four on the other side of the supply table 13. It is provided! The label holding core 20 on one side of the supply table 13 and the label holding core 20 on the other side can be separated from each other by a cylinder 32.

[0063] By the way, the label holding core 20 is preferably used when a long label near 360 ° or more than 360 ° is attached to a container. As shown in FIGS. 16 and 18, the label holding core 20 is formed of a substantially cylindrical body, and is formed with a recess 20 d that is drawn inwardly on one side of the cylindrical body and that receives both end portions 3 a of the label 3.

That is, a pair of small cylindrical portions 20b and 20c are provided on the side surface of the label holding core 20, and a concave portion 20d for receiving both end portions 3a of the label 3 is formed between the pair of small cylindrical portions 20b and 20c. Yes. Further, a suction portion 20a for sucking and holding the label is provided on the side surface of the label holding core 20.

[0065] Since the concave portion 20d for receiving both end portions 3a of the label 3 is formed on the side surface of the label holding core 20 as described above, the label 3 is placed on the side surface of the label holding core 20 so that the both end portions 3a are in the concave portion 20d. It can be wound as it enters. Therefore, a relatively long label 3 can be wound in the circumferential direction by the label holding core 20 as compared with the case where there is no recess 20d. If the label is relatively short in the circumferential direction, for example, if it is 180 ° to less than 360 ° (gap of about 0 to 5 mm), the label is held only by the cylinder as shown in Figs. By using the core 20e, the label 3 is wrapped around the label holding core. The power to kick S The label 3 is sucked and held by the label holding core 20e by being sucked from the label suction hole 20f provided on the side surface of the cylindrical body.

Next, the blow mold 40 held by the rotary table 11 will be described with reference to FIGS. 13 to 15.

As shown in FIGS. 13 to 15, the rotary table 11 is provided with 2 to 4 sets of blow molds 40 (in the figure, 4 sets are shown), There are 40 blow molds of 4 each. A set of blow molds consisting of four blow molds 40 is arranged 90 ° apart from each other in the case of four sets of blow molds, and in the case of two sets of blow molds. They are 180 apart from each other.

In addition, the blow mold 40 provided on the turntable 11 is held by the holding plate 53 for each set of four. That is, the holding plate 53 for holding each set of blow molds 40 can be moved vertically with respect to the cylinder 50 with respect to the rotary table 11, and one holding plate 53 has a holding rod. Four blow molds 40 are attached via 51.

Further, a base 55 is provided below the rotary table 11, and the rotary table 11 is rotated by a servo motor 48 provided on the base 55.

Further, in FIG. 13, the right side of the rotary table 11 is a blow molding part 12, and the left side of the rotary table 11 is a blow gold from a label 3 wound around the label holding core 20 on the supply table 13. The transfer part 13b is inserted into the mold 40. Note that the opposite side of the transfer section 13b of the supply table 13 is a supply section 13a that supplies the label 3 to the label holding core 20 (see FIG. 12).

As shown in FIG. 13, an air blowing device 43 is provided in a portion of the base portion 55 corresponding to the blow molding portion 12, and the air blowing device 43 is provided with a compressed air blowing port 43a. Yes.

Further, the base 55 is provided with a stretch rod 45 penetrating the air blowing device 43, and the stretch rod 45 is moved in the vertical direction by an elevating cylinder 45 a attached to the base 55. The stretch rod 45 is inserted into the preform 2a held in the blow mold 40, and presses the preform 2a against the blow mold 40 during blow molding. As shown in FIG. 15, the blow mold 40 has a cylindrical side nested mold 40a, a blow mold clamping mold 140 surrounding the side nested mold 40a, and a bottom nested mold 40c. is doing. The preform holder 41 for holding the preform 2a is adapted to be fitted to the blow mold 40 and the blow mold clamping mold 140, and the preform 2a is connected to the preform holder 41 and the preform mold 140. It is held by a blow mold clamping die 140 provided outside the holding body 41.

Further, in FIG. 15, in the blow mold 40, the stretch rod 45 described above rises from below to push the preform 2a against the bottom insert mold 40c of the blow mold 40. I'm starting to learn.

Next, the operation of the present embodiment having such a configuration will be described.

As shown in FIG. 10, a preform 2a is molded in a preform molding section 15 having a pair of preform molding dies 15a and 15b.

The preform 2 a molded in the preform molding unit 15 is cooled by the preform cooling unit 16.

Next, the preform 2a is sent to the gate cut portion 17 and gate-cut.

[0079] The preform 2a cooled in the preform cooling section 16 and gate-cut in the gate cut section is held by the preform holding body 41, and the preform holding body 41 is heated to the heating section 18 by the transport body 42. Be transported.

[0080] The preform 2a held by the preform holder 41 is conveyed to the heating unit 18 and heated by the heating unit 18. Thereafter, the preform holder 41 holding the preform 2a is conveyed to the rotary table 11.

During this time, the blow mold 40 held on the rotary table 11 is conveyed as the rotary table 11 rotates, so that the label 3 held by the label holding core 20 is supplied into the blow mold 40. It has become.

Next, the operation of forming the label 3 and supplying the label 3 into the blow mold 40 will be described.

First, as shown in FIG. 11 and FIG. 12, the label molding supply unit 21 forms the label 3, and the label 3 thus molded is supplied to the label holding core 20 side.

That is, in FIG. 11 and FIG. 12, the label raw material supply unit 2 of the label molding supply unit 21 The label original 22 is supplied from 8, and the label original 22 supplied from the label original supply unit 28 is sent by the guide roller 31 to the slitter 23 provided on the downstream side of the guide roller 31. In the slitter 23, the label original fabric 22 is slit in the conveying direction to form a plurality of, for example, four strip-shaped label original fabrics 22. The strip-shaped label original fabric 22 is then cut at a label cutting portion 24 provided on the downstream side of the slitter 23 to form a label 3. At this time, the leading end of the original label 22 is held by the clamp 33.

Next, the label 3 formed by cutting the label original fabric 22 in the label cutting part 24 is received by the label cutting part 24 and the receiving part 25 provided below the clamp 33.

[0086] Next, the moving body 27 holding each receiving portion 25 moves in the width direction, the receiving portion 25 expands in the width direction, and then the receiving portion 25 rotates 90 ° to extend in the transport direction. Label 3 changes its orientation and is arranged in the width direction.

[0087] Next, the label 3 on the receiving portion 25 is rotated by a lever (rotating mechanism) 26, and the direction is changed from the horizontal direction to the vertical direction.

As described above, the direction of the label 3 is changed from the horizontal direction to the vertical direction by the receiving portion 25, so that the label 3 is placed on the outer periphery of the four label holding cores 20 arranged in advance at the supply position of the supply table 13. Is wound.

In this case, since the suction part 20a is provided on the outer periphery of the label holding core 20, the label 3 is sucked and held by the suction part 20a of the label holding core 20.

By the way, as described above, a pair of small cylindrical portions 20b, 20c are provided on the side surface of the label holding core 20, and the concave portions for receiving both end portions 3a of the label 3 between the pair of small cylindrical portions 20b, 20c. 20d is formed.

[0091] Since the concave portion 20d for receiving both end portions 3a of the label 3 is formed on the side surface of the label holding core 20 in this way, the label 3 is disposed on the side surface of the label holding core 20 and the both end portions 3a are recessed.

It can be wound into the 20d. Therefore, a relatively long label 3 can be wound in the circumferential direction by the label holding core 20 as compared with the case where there is no recess 20d.

[0092] Next, the supply table 13 is rotated by 180 ° and is in the supply position 13a of the supply table 13 4 The label holding core 20 is sent to the transfer position 13b of the supply table 13. At this transfer position 13b, the label 3 held by the label holding core 20 is inserted into the blow mold 40 and transferred. Is done.

That is, four blow molds 40 held by the rotary table 11 are on standby in the transfer device 13b. When the label holding core 20 comes to the transfer position 13b, the blow mold 40 is lowered to the label holding core 20 side by the cylinder 50 provided on the rotary table 11, and the label 3 held by the label holding core 20 is removed. The label 3 is transferred into the blow mold 40 from the label holding core 20 by being inserted into the blow mold 40 and simultaneously or sequentially performing suction release of the label holding core and suction of the blow mold.

At this time, the label 3 is sucked and held by a suction hole, a suction slit, or a combination thereof provided on the inner surface of the blow mold 40.

Further, as described above, the label holding core 20 can hold the label 3 having a relatively long circumferential length. Therefore, a label having a long circumferential length can be attached easily and reliably into the blow mold 40, and the force S covering the substantially entire circumference of the blow-molded container 1 with the label 3 can be achieved.

Next, the rotary table 11 is rotated by the servo motor 48, and the blow mold 40 comes to the blow molding part 12 side. At this time, a preform holding body 41 holding the preform 2a is disposed below the blow mold 40. Thereafter, the blow mold 40 and the preform holder 41 are lowered, and the preform holder 41 is fitted to the air blowing device 43 provided in the portion of the base 55 corresponding to the blow molded portion 12.

Next, compressed air is supplied into the preform 2 a from a compressed air blowing port 43 a provided in the air blowing device 43.

[0098] As described above, the base 55 is provided with the stretch rod 45 penetrating the air blowing device 43, and the stretch rod 45 is attached to the base 55 simultaneously with the supply of compressed air into the preform 2a. It moves upward by the lifting cylinder 45a. The stretch rod 45 moved upward is inserted into the preform 2a held in the blow mold 40 and presses the preform 2a against the blow mold 40.

[0099] In this way, the container body 2 with the label 3 adhered to the outside of the side surface in the blow mold 40 A blow molded container 1 is obtained by biaxial stretch blow molding.

[0100] In the present embodiment, the label 3 held by the label holding core 20 can be inserted into the blow mold 40, and both end portions 3a, 3a of the label 3 are inserted into the label holding core 20. Since the recess 20d is provided, the label 3 having a relatively long circumferential length can be attached to the blow mold 40. For this reason, substantially the entire circumference of the blow molded container 1 can be covered with the label 3 having a long circumferential length.

[0101] The container body 2 is capable of performing biaxial stretch blow molding without particular limitation as long as it is a thermoplastic resin such as polypropylene, polyethylene, polystyrene, polyester, polycarbonate, and polylactic acid. In view of low odor of containers, polyethylene resin, polypropylene resin, random copolymer obtained by random copolymerization of propylene and ethylene, block copolymer obtained by block copolymerization of propylene and ethylene, or polypropylene and A mixed resin with polyethylene can be suitably used. In particular, the use of a block copolymer is preferred because the drop impact strength is improved.

[0102] Further, the container with the in-mold label attached as described above can have a container body thickness of 200-800111. In this specification, “thickness of the container body” means force S, which means the thickness of the container where no in-mold label is provided, and the area around the container with and without the label. Since there are almost no steps on the surface, the wall thickness is approximately 200 to 800 m even on the side of the container where the in-mold label is attached.

[0103] The in-mold label 3 used in the present invention has a multilayer structure, and generally comprises a printing substrate layer, an intermediate layer, and an adhesive layer with the container body. Each of these layers is independently formed into a film and bonded (dry lamination) via an adhesive, or part or all of the layers are formed by melt extrusion (EC, co-extrusion). You can also. Further, the printing substrate layer can be omitted depending on the purpose of use.

[0104] The film as the printing substrate is not particularly limited as long as it is generally printable. For example, a polyester film, a polypropylene film, a nylon film, a synthetic paper, and the like can be suitably used. A biaxially stretched polypropylene film (hereinafter also referred to as OPP film) is more preferably used. Also, one end of the in-mold label and the other end When in-mold labeling is performed with 2 to 5 mm in length, synthetic paper such as YUPO (manufactured by YUPO Corporation) or Carle (manufactured by Chisso) is preferred from the viewpoint of adhesiveness at the label edge. .

[0105] The intermediate layer preferably functions as a NOR layer. For example, (&) aluminum foil (thickness 7 to 25 111), (b) a metal or metal oxide laminated on a plastic film or the like by vapor deposition, for example, a silicon oxide vapor-deposited plastic film , Oxidized aluminum vapor-deposited plastic film, aluminum vapor-deposited plastic film, diamond-like carbon chemical vapor-deposited film (c) and others, polyacrylonitrile resin, EVOH (ethylene sulphate butyl saponified copolymer), PVDC (polyvinylidene chloride) film, PVDC coating Toni-axially stretched plastic film and the like can be mentioned, and can be appropriately selected according to the desired performance

[0106] The adhesive layer is not particularly limited as long as it adheres to the resin of the container body. Usually, a plastic made of the same material as the resin on the container side, a heat-sealable resin film, or the like is preferably used. it can.

[0107] Each of the above layers is formed by a dry lamination method, an extrusion lamination method, an extrusion coating method, or other coating methods according to a conventional method.

[0108] Specific label layer configurations include the following embodiments.

(1) OPP (30 a m) / Adhesive / PET (12 m) / Ink layer / Adhesive / Aluminum foil (7 μm) / Adhesive / Heat sealability OPP (30 [I m)

(2) OPP (40 μm) / Ink / Adhesive layer / Aluminum foil (7 μm) / Adhesive layer / Heat sealability OPP OO ^ m)

(3) OPP (30 μm) / Ink / Adhesive layer / Aluminum-deposited PET (12 μm) / Adhesive / Heat sealability OPP (30 m)

(4) OPP (30 a m) / Ink / Adhesive layer / Aluminum deposition heat sealability OPP (30 μm)

(5) OPP (30 μm) / Ink / Adhesive layer / Transparent deposition PET (12 μm) / Adhesive layer / Heat sealable OPP (30 m)

(6) OPP (30 a m) / Ink / Adhesive layer / Heat sealability OPP (30 μm)

(7) OP ink / Synthetic paper (80 μm) / Heat sealant [0109] Combination of in-mold label container lid

Next, a combination of the in-mold label container and the lid according to the present invention will be described. FIG. 20 is a cross-sectional view of the state in which the lid 50 is attached to the in-mold label container 1. The fixing ring 51 of the lid 50 is fixed by engaging with the opening 5 of the in-mold label container. With this fixing ring 51, the lid 50 can be attached to and detached from the container 1.

[0110] The opening shoulder 6 of the container body is formed so that the container body and the lid part fit with each other so that the fixing ring 51 that is the outer peripheral surface of the lid 50 combined with the container 1 and the outer peripheral side surface 7 of the container main body are not stepped. It is molded into. Thus, since there is no gap between the peripheral surface of the fixing ring portion of the lid and the outer peripheral side surface of the container, the sense of unity of the whole combination is improved, which is aesthetically preferable.

The upper plate 52 of the lid is provided with an inner ring 54 so as to be disposed on the inner side of the side plate 53 together with the side plate 53 descending from the peripheral line of the upper plate 52. When the upper end of the opening 5 of the container 1 is press-fitted into the gap between the side plate 53 and the inner ring 54, the lid is closed. Since there is almost no gap between the opening 6 of the container and the side plate 53 or the inner ring 54, the container can be kept closed and closed.

[0112] Further, the upper plate 52 of the lid is provided with a contact ring 55 that descends from the peripheral line of the upper plate between the side plate 53 and the inner ring 54. When the lid 50 is engaged and fixed with the container 1, the contact ring 55 comes into contact so as to press the upper end of the opening 5 of the container. This contact ring further improves the sealing of the container.

[0113] As described above, the in-mold label container according to the present invention has been described by taking the wide-mouthed cylindrical container as shown in Fig. 1 as an example of the form of the container body. However, the container body of other forms is not excluded. If the part where the label is attached is cylindrical, for example in Figure 21

[0114] In addition, the label mounting portion of the container body is not limited to a cylindrical shape, but a shape that allows a strip-shaped label to be mounted on the side of the container, for example, an elliptical cylindrical shape as shown in FIG. It may be a triangular cylinder shape or a square cylinder shape.

Claims

The scope of the claims

[I] A biaxial stretch blow characterized by comprising a cylindrical container body formed by biaxial stretch blow and an in-mold label extending over 180 ° along the outer peripheral side surface of the container body. An in-mold label container formed by molding.

[2] The in-mold label container according to claim 1, wherein the in-mold label force S extends over 360 ° or more along an outer peripheral side surface of the container body.

[3] The in-mold label container according to claim 1 or 2, wherein the in-mold label force S extends along the outer peripheral side surface of the container body by 365 °.

[4] The in-mold label container according to claim 3, wherein an overlap between one end of the in-mold label and the other end is 2 to 5 mm.

[5] The in-mold label container according to claim 1, wherein a gap between one end of the in-mold label and the other end is 0 to 5 mm.

[6] The opening shoulder of the container body is formed such that the container body and the lid are fitted so that the outer peripheral surface of the lid combined with the container main body and the outer peripheral side of the container main body are not stepped. The in-mold label container according to any one of claims 1 to 5.

[7] The container body is a polyethylene resin, a polypropylene resin, a random copolymer obtained by random copolymerization of propylene and ethylene, a block copolymer obtained by block copolymerization of propylene and ethylene, or a mixture of polypropylene and polyethylene. The in-mold label container according to any one of claims 1 to 6, which is made of resin, force.

[8] The in-mold label container according to any one of claims;! To 7, wherein the in-mold label container has a multilayer structure.

9. The in-mold label container according to claim 8, wherein the in-mold label includes a barrier layer as an intermediate layer.

10. The in-mold label container according to claim 9, wherein the barrier layer is an aluminum vapor deposition layer or an aluminum foil layer.

[I I] The in-mold label container according to any one of claims;! To 10, wherein a thickness of an outer peripheral side surface of the container body is 200 to 800 111.

[12] When a gap is formed between one end and the other end of the in-mold label In this case, each edge is formed so as to be inclined with respect to the resin flow direction at the time of injection molding of the container! /! Mold label container.

13. The in-mold label container according to claim 12, wherein a gap formed between one end and the other end of the in-mold label is zigzag or wavy.

[14] A rotary table that holds a plurality of blow molds and is rotatable,

A label holding core that winds and holds the label and supplies the label into the blow mold of the rotary table;

A preform holding and supplying section that holds the preform and that fits into the blow mold of the rotary table and supplies the preform into the blow mold;

An air blowing device connected to a preform holding and feeding unit that fits into a blow mold of a rotary table;

A preform set in the preform holding and supplying unit, and a blow mold clamping device for closing the preform holding and supplying unit and the blow mold from the left and right,

The in-mold according to any one of claims 13 to 13, wherein the label holding core is formed by using a container blow molding system comprising a cylindrical body that can be inserted into a blow mold. Label container.

[15] The combination of the in-mold label container and the lid according to any one of claims 1 to 13