JP2009190740A - Packaging material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging material capable of forming a fold of a gusset part at an intended adequate position when forming a packaging body having the gusset part. <P>SOLUTION: The packaging material 1 has a long sheet body 2 having a columnar part 3 extending in a strip shape along the longitudinal direction at least on one part in the width direction. The packaging material is worked into a package 10 having the gusset part 11 by locating the columnar part 3 at a corner part and folding a part with the columnar part 3 on one end side in the width direction in the width direction. A fold scheduled part 20 forming a fold 11a when it is folded is provided in a strip shape along the longitudinal direction on a gusset forming part 4 forming the gusset part 11 of the package 10 of the sheet body 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a packaging material for packaging, for example, foods and the like, and more specifically, includes a long sheet body having a columnar portion extending in a strip shape along the longitudinal direction in at least one position in the width direction. It is related with the packaging material processed into the package body which is located in a part and makes this columnar part the one end side of the width direction is folded in the width direction, and has a town part.

  Conventionally, as this type of packaging material, one for a pillow packaging machine is publicly known from Patent Document 1. Such a packaging material includes a long sheet body having columnar portions extending in a strip shape along the longitudinal direction at at least one place (specifically, four places) in the width direction, and the columnar portions are positioned at corners. And the part which makes this columnar part one end side in the width direction is a packaging material that is folded in the width direction to be processed into a package having a gusset, and when the article or food is pillow-wrapped, the package is as if side gusset It is intended to present a packaging bag with a label.

  By the way, when pillow wrapping is performed using such a packaging material, the sheet body is conveyed while being formed into a cylindrical shape, and after an article to be packaged is disposed therein, it is sealed in the width direction forward and backward in the conveying direction. However, before forming the gusset, the gusset forming projection provided in the pillow packaging machine was made cylindrical from the side before the long sheet body made cylindrical was sealed in the width direction. By projecting the sheet main body and folding the side portion of the sheet main body in the width direction, the gusset portion is formed with a crease along the longitudinal direction (see, for example, Patent Document 2).

JP 2007-8512 A JP 2004-238065 A

  However, since the operation of folding in the width direction to form the gusset is performed while conveying the sheet main body, the fold of the gusset is originally intended by the behavior of the sheet main body such as shaking, meandering, and skewing. There is a case where it is formed at a position shifted from an appropriate position. For example, there is a problem that the appearance is deteriorated.

  Then, when forming the package which has a town part, this invention aims at providing the packaging material which can be formed in the appropriate position where the fold of the town part was intended.

  The packaging material according to the present invention includes a long sheet body having a columnar portion extending in a strip shape along the longitudinal direction in at least one position in the width direction, the columnar portion is positioned at a corner portion, and the columnar portion is widened. A packaging material that is processed into a package having a gusset by folding a portion that is one end side in the direction into the width direction, and is folded into a gusset forming portion that becomes a gusset of the package in the sheet body A fold planned portion that becomes a crease when it is formed is provided along the longitudinal direction.

  According to the packaging material having the above-described configuration, the fold-scheduled portion is provided in the town forming portion, so that the fold can be formed along the fold-scheduled portion when the town forming portion is folded.

  Further, it is preferable that the fold planned portion is provided as a portion where the thickness of the sheet main body is thinner than a portion around the fold planned portion.

  In this way, the force applied when the town forming portion is folded acts intensively on the thin portion of the sheet body, so that the fold can be easily formed.

  Moreover, it is preferable that the fold planned portion is provided as a groove-shaped half cut.

  This is convenient because a known method of forming a half cut can be used as a method for forming a thin portion in the sheet body.

  The sheet main body may be configured by joining a paper sheet and a plastic sheet, and the crease scheduled portion may be provided on the paper sheet.

  In this way, since the sheet body is composed of sheets of different materials, for example, it is easy to form a fold planned portion only on one sheet by utilizing the fact that the properties differ depending on the sheet. Can do.

  As described above, according to the present invention, when forming a package having a gusset, the fold of the gusset can be formed at an appropriate position intended.

<First Embodiment>
Below, 1st Embodiment of the packaging material which concerns on this invention is described based on drawing.

  As shown in FIG. 1, the packaging material 1 according to the first embodiment includes a long sheet body 2 having a columnar portion 3 extending in a strip shape along the longitudinal direction in at least one place in the width direction. As shown, the columnar portion 3 is positioned at a corner portion, and a portion having the columnar portion 3 as one end side in the width direction is folded in the width direction to be processed into a package 10 having a gusset 11. . And the fold planned part 20 used as the fold 11a when it folds is provided in the strip | belt shape along the longitudinal direction in the town formation part 4 used as the town part 11 of the said package 10 among the said sheet | seat main bodies 2. FIG.

  Specifically, as shown in FIG. 1, the packaging material 1 is long for continuous supply to a pillow packaging machine, and rolls as a form for continuous supply to a pillow packaging machine. It is taken up into a shape and used as the take-up roll. Moreover, the packaging material 1 (sheet | seat main body 2) equips the four places of the width direction with the strip | belt-shaped columnar part 3 along a longitudinal direction. Each columnar portion 3 is formed by partially overlapping a long and flat sheet material 1 ′. That is, each columnar part 3 is provided as a collar part formed by sealing a part obtained by folding the sheet material 1 ′ in a range of a predetermined width from a bending ridge line, either entirely or partially. Moreover, the columnar part 3 is formed on the front side (the front side of the sheet main body 2) when the packaging body 10 is completed among the two front and back surfaces of the sheet main body 2.

  The sheet body 2 is formed of a resin plastic sheet having heat sealability. Specifically, a polypropylene sheet generally called OP or PP, a polyethylene sheet, or the like is used.

  As shown in FIGS. 1A and 1B, the sheet body 2 is divided into a plurality of regions 5, 6, 7, 8, and 9 by the columnar portions 3. Of the plurality of regions 5, 6, 7, 8, 9, the central region 5 having the largest width dimension corresponds to the front portion 12 (see FIG. 2) of the completed package 10, and both sides thereof. The regions 6 and 7 correspond to the town part 11 located on the side parts 13 and 14 of the completed package 10 and serve as the town forming part 4. That is, the town forming portion 4 is an area having two columnar portions 3 and 3 on both ends in the width direction and sandwiched between the two columnar portions 3 and 3.

  Further, the regions 8 and 9 on the outer side in the width direction from the town forming part 4 of the town sheet body 2 correspond to the back part 15 of the completed package 10. Specifically, regions (back surface equivalent regions) 8 and 9 corresponding to the back surface portion 15 are provided separately on both sides of the pair of town forming portions 4, and when the package body 10 is completed, As shown in FIG. 2 (C), the back surface portion 15 is formed by joining and continuing the widthwise end portions 8a, 9a of the pair of back surface equivalent regions 8, 9 together.

  Next, the crease scheduled portion 20 provided in the town forming portion 4 will be described with reference to FIG. 1C shows the upper left town formation portion 4 in FIG. 1A, but the lower right town formation portion 4 has the same structure. The fold planned portion 20 is provided as a portion where the thickness of the sheet body 2 is thinner than a portion around the fold planned portion 20. That is, the sheet body 2 is formed such that the thickness of the fold planned portion 20 is thinner than the surrounding portion. Specifically, the fold planned portion 20 is provided as a groove-shaped half cut. Further, the half cut as the fold planned portion 20 is formed on the front side of the sheet body 2. However, it is not limited to this, and may be formed on the back side of the sheet body 2.

  The fold planned portion 20 is formed by irradiating ultrasonic waves, lasers, or the like. Specifically, by irradiating a plastic sheet made of resin with these ultrasonic waves, laser, etc., heat energy is generated to partially melt the plastic sheet, and the molten plastic is cured while being pushed to the side. As a result, a groove-shaped half cut recessed in the thickness direction of the sheet body 2 is formed.

  Further, the fold planned portion 20 is formed at the center in the width direction of the town forming portion 4. However, the planned crease portion 20 can be provided at an arbitrary position depending on the position at which the crease is to be provided when the packaging body 10 is completed, and is provided at a position biased to one side in the width direction. There may be.

  As mentioned above, according to the packaging material 1 which concerns on this embodiment, when forming the package 10 which has the town part 11, the crease | fold 11a of the town part 11 can be formed in the intended appropriate position. . Therefore, the appearance of the completed package 10 can be improved. In addition, the crease 11a functions like a rib that gives the package 10 a firmness, so that the standing state of the package 10 can be kept good.

  That is, the wrapping material 1 is provided with the fold planned portion 20 in the town forming portion 4, so that the fold 11 a can be formed along the fold planned portion 20 when the town forming portion 4 is folded.

  Further, the fold planned portion 20 is provided as a portion where the thickness of the sheet body 2 is thinner than a portion around the fold planned portion 20. Accordingly, the force applied when the town forming portion 4 is folded acts on the thin portion of the sheet main body 2 in a concentrated manner. Therefore, the sheet main body 2 is easily bent from there, and the fold line 11a is easily formed. can do.

  Further, the fold schedule portion 20 is provided on the front side of the sheet body 2. Therefore, for example, when the projection for forming the town portion provided in the pillow packaging machine is brought into contact with the sheet body 2 formed into a cylindrical shape from the side, a force can be directly applied to the fold planned portion 20. Therefore, the fold line 11a can be more reliably formed at the intended position.

Second Embodiment
The packaging material 101 according to the second embodiment has the same basic structure as the packaging material 1 according to the first embodiment, but the material of the sheet main body 102 is different. In the following, the same points as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The differences from the first embodiment are mainly described.

  Specifically, in the packaging material 101 according to the second embodiment, as shown in FIG. 3, the sheet main body 102 is configured by joining a paper sheet 102a and a plastic sheet 102b. The fold schedule portion 120 is provided on the paper quality sheet 102a. The paper sheet 102a may be a paper sheet, a single-layer sheet in which rayon paper is impregnated with polyethylene resin or polypropylene resin, or a nonwoven fabric such as a spunbond nonwoven fabric. Are members having different properties. The material of the plastic sheet 102b is the same as that described in the first embodiment.

  The fold planned portion 120 is formed by irradiating ultrasonic waves, lasers, or the like. Specifically, by appropriately controlling the output state of these ultrasonic waves, lasers, etc., the paper sheet 102a without breaking the plastic sheet 102b out of the paper sheet 102a and the plastic sheet 102b constituting the sheet body 102. Only break. As a result, a groove-shaped half cut recessed in the thickness direction of the sheet main body 102 is formed.

  According to the packaging material according to the second embodiment, since the sheet main body 102 is configured by the sheets 102a and 102b made of different materials, for example, by using the fact that the properties differ depending on the sheets, the fold is scheduled only on one sheet 102a. The part 120 can be easily formed. Further, by forming the fold scheduled portion 120 only in the paper sheet 102a, the air flow can be suitably blocked by the plastic sheet 102b.

  In addition, the packaging material which concerns on this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, in each of the above-described embodiments, the example in which the bowl-shaped columnar portions 3 are provided at the four positions in the width direction of the sheet main body 2 has been described, but the number of the bowl-shaped columnar portions 3 is not limited to four. That is, as shown in FIG. 4, the packaging material 201 provided with the three bowl-shaped columnar parts 3 may be sufficient. The packaging material 201 corresponds to the region 205 that is a portion corresponding to the front portion 12 of the completed package 10 and the town portion 11 that is disposed on both sides of the region 205 and located on the side portions 13 and 14 of the package 10. The regions 206 and 207 to be the portions to be formed and the region 208 that is disposed on the side of the region 207 and corresponds to the back surface portion 15 are configured. And this packaging material 201 is joined by heat welding etc. in the state which the width direction both ends 202a and 202b of the sheet | seat main body 202 are located in the corner | angular part of the packaging body 10 (so-called "side alignment"), As with the other bowl-shaped columnar portions 3, the columnar portions 203 are formed at the corners of the package 210.

  Moreover, in each said embodiment, although the fold plan part 20 was each formed in the said town part 11 located in the both sides 13 and 14 of the completed package 10, the package has 2 It may be formed only in one of the side portions 13 and 14 of the town portion 11.

  Moreover, in each said embodiment, although the fold plan part 20 was provided continuously along a longitudinal direction, it is not limited to this, Even if it is provided intermittently Good. As a specific example, a configuration in which a plurality of thin portions are arranged in a straight line is conceivable.

  Further, the crease scheduled portion may be provided by making the periphery thicker, for example, by joining another member in addition to that provided by making the sheet main body thin. In addition, in the case where the sheet main body is configured by joining a plurality of sheets, the crease scheduled portion is formed by joining another sheet while leaving a portion to be a fold planned portion with respect to the sheet serving as the base material. It may be provided. That is, it is sufficient if the rigidity of the fold planned portion is set lower than that of the surrounding portion.

  Moreover, in each said embodiment, although the sheet | seat made from a synthetic resin with a double-sided heat-sealing property was used as a sheet | seat raw material, it is not limited to this. In addition, in any sheet material, as long as it has heat-sealability, heat welding is preferable as an integration means (joining means), but not limited thereto, adhesion using an adhesive, Known joining means such as welding by chemical action can be appropriately selected. As long as the sheet material does not have heat sealability, a joining means other than heat welding can be selected.

  Further, in each of the above embodiments, the sheet body 1 ′ is appropriately folded in the width direction to form the sheet main body 2 and the columnar portion 3, but it may be as shown in FIG. 5. That is, after a plurality of sheet materials 305, 306, 307, and 308 are joined in a manner of joining in the width direction to form a sheet body having columnar portions 303 at three locations, both end portions in the width direction of the sheet body 202 are connected to each other. It joins in the state located in the corner | angular part of the package 310, The junction part may be used as the columnar part 403 in the corner | angular part of the package 310.

  Moreover, in each said embodiment, although the columnar part 3 is following along the longitudinal direction of the sheet | seat main body 2, it may be divided in some places.

  In each of the above embodiments, as the sheet body, a polypropylene sheet or the like, or a composite sheet configured by joining a paper sheet and a plastic sheet has been described as an example. Various materials are conceivable, and materials having various functions such as moisture resistance, breathability, and gas barrier properties are used in accordance with the properties of the package. For example, when strong stiffness is required, a PET sheet can be used. When moisture resistance and gas barrier properties are required, a metal vapor-deposited sheet in which a metal such as aluminum is vapor-deposited on a plastic sheet Can be used. Furthermore, as the sheet body, a composite sheet constituted by joining these various sheets can be used. For example, a sheet such as OP is joined to a metal vapor deposition sheet to ensure heat sealability. Can be considered.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the packaging material which concerns on 1st Embodiment of this invention, Comprising: (A) shows a perspective view, (B) shows the schematic sectional drawing over the full width, (C) is a town formation part. The expanded sectional view of is shown. It is sectional drawing which shows the package body completed using the packaging material which concerns on the same embodiment, Comprising: (A) shows a whole perspective view, (B) shows a side view, (C) shows an upper surface. A cross-sectional view is shown. The expanded sectional view of the town formation part of the packaging material concerning a 2nd embodiment of the present invention is shown. The upper surface sectional view of the packaging material concerning other embodiments of the present invention is shown. The upper surface sectional view of the packaging material concerning other embodiments of the present invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Packaging material, 1 '... Sheet material, 2 ... Sheet main body, 3 ... Columnar part, 4 ... Town formation part, 5 ... Area | region equivalent to a front part, 6, 7 ... Area | region equivalent to a town part, 8, 9 ... area corresponding to the back part, 8a, 9a ... both ends in the width direction, 10 ... package, 11 ... town part, 11a ... crease, 12 ... front part, 13, 14 ... side part, 15 ... back part, 20 ... Planned crease part, 101 ... wrapping material, 102 ... sheet main body, 102a ... paper sheet, 102b ... plastic sheet, 120 ... fold creased part, 201 ... packaging material, 202 ... sheet main body, 202a, 202b ... width direction both ends, 203 ... Columnar part, 205 ... Area corresponding to the front part, 206, 207 ... Area corresponding to the town part, 208 ... Area corresponding to the rear part, 210 ... Package, 303 ... Columnar part, 305, 306, 307, 308 ... sheet material, 10 ... package, 403 ... columnar section

Claims (4)

A portion having a long sheet main body having a columnar portion extending in a strip shape along the longitudinal direction in at least one position in the width direction, wherein the columnar portion is positioned at a corner and the columnar portion is one end side in the width direction. A packaging material that is folded into the width direction and processed into a package having a gusset,
A wrapping material, wherein a crease scheduled portion that becomes a fold when folded is provided along a longitudinal direction in a town forming portion that becomes a gusset portion of the package body in the sheet body.   The packaging material according to claim 1, wherein the fold planned portion is provided as a portion where the thickness of the sheet main body is thinner than a portion around the fold planned portion.   The packaging material according to claim 1, wherein the fold planned portion is provided as a groove-shaped half cut. The sheet body is configured by joining a paper sheet and a plastic sheet,
The packaging material according to claim 1, wherein the fold-scheduled portion is provided on a paper sheet.

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