JP2017145051A - Film packaging and method for packaging product in film packaging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film packaging which is easy to manufacture and reproducibly creates an opening, and also to provide a method for packaging a product in the same.SOLUTION: The present invention relates to a film packaging (1) with a front side (2) extending in a longitudinal direction (l) and in a transverse direction (q) and a rear side (3) extending in the longitudinal direction (l) and in the transverse direction (q). The front side (2) and the rear side (3) are connected to each other by a transverse sealing seam (6) which extends in the transverse direction (q) and forms a terminating edge (5) of the film packaging (1). According to the invention, at least two weakening lines (7), each extending in the longitudinal direction (l) are arranged on the front side (2) and the rear side (3), which lines extend over the entire front side (2) and the entire rear side (3) in the longitudinal direction (l). The invention also relates to a method for packaging a product in a film packaging (1) particularly according to the invention.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a film packaging body having a front surface portion extending in a longitudinal direction and a lateral direction and a back surface portion expanding in a longitudinal direction and a lateral direction. The front surface portion and the back surface portion are joined to each other by a transverse seal that extends in the transverse direction. At the same time, the horizontal seal is the end edge of the film package, and this horizontal seal opens the packaging internal space provided between the front and back sides to store the product. On the other hand, it is partitioned in the longitudinal direction. At that time, there is no problem even if the front surface portion and / or the back surface portion protrudes in the longitudinal direction from the side opposite to the packaging internal space of the transverse seal. The subject of the invention is also a method for packaging a product, in particular a method for packaging a product in a film package according to the invention.

  The film packaging according to the invention can in particular be produced by the so-called “Form Fill and Seal” (FFS) method and packed at the same time. At this time, since the film material is supplied so as to form a front surface portion extending in the longitudinal direction and the lateral direction and a back surface portion expanding in the longitudinal direction and the lateral direction, the packaging internal space is formed between the front surface portion and the back surface portion. Is formed. A product is arranged in the package inner space between the front surface portion and the back surface portion, and then the package inner space is sealed by a horizontal seal that extends in the lateral direction and joins the front surface portion to the rear surface portion.

  This type of method is used on a large scale in automated packaging lines to apply an easy-to-handle external packaging made of film material to any product. In that case, the method is suitable for any product type. For this reason, rectangular or rod-shaped products are particularly well suited for this type of packaging method. However, for example, as a process for pouring goods such as granules and powders, and even liquids, so-called VFFS (Vertical Form Fill Seal) (vertical foam fill seal) (vertical pillow packaging) process If the FFS process is performed vertically, the FFS process can be used. In that case, the film wrap is first pre-finished so that the wrap is tightly sealed on the sides and bottom so that a pourable product can be filled from above. The film package is then sealed by a top side transverse seal.

  A high strength film material is preferably used to carry out the FFS process so that it can withstand high mechanical requirements through transport and bag forming. Preferably, an oriented or biaxially oriented polymer film such as OPTET (Orientates Polyethylene terephthalate) or BOPP (Bial axial orientation Polypropylene) is used. Cellulose-based film sheets are also particularly well suited for use purposes.

  However, these materials have the disadvantage of having an unpredictable tear property (unpredictable tear properties). This is because a sheet of material made of the above-mentioned materials will certainly tear easily, but the subsequent split spread will proceed almost unexpectedly. For example, even if it is a multilayer composite film having other functional layers such as a sealing layer and a covering layer, the tear characteristics are almost determined by a brittle layer having no elasticity. For this reason, the user cannot tear off the film package manufactured by the FFS method without being considerably restricted. Usually, it is easier to use the film package by opening at least one sealing eye. This is known, for example, in the field of snack packaging.

  Nevertheless, it is desirable to provide a well-defined way of tearing even with the latest FFS packaging. This may be necessary to achieve a reproducible opening of sufficient size, such as in the case of a bar product. In this way, the product can be taken out, for example. Even in the case of pourable articles, a well-defined opening is indispensable so that they cannot be collected when poured out. However, the ease of making must remain at the same time.

  The means for solving this problem and the object of the present invention are the film package according to claim 1 and the method according to claim 11. Preferred forms are described in the subclaims.

  The film package which belongs to this has the front part which spreads in a longitudinal direction and a transverse direction, and the back part which spreads in a longitudinal direction and a transverse direction. The front surface portion and the back surface portion are joined to each other via a lateral seal that extends in the lateral direction, and the lateral seal forms an end edge of the film package. According to the present invention, at least two weakening lines each extending in the longitudinal direction are provided on the front surface portion and the back surface portion, and these weakening wires extend over the entire front surface portion and the entire back surface portion. It extends in the longitudinal direction. The front part and the back part preferably have at least one plastic layer using oriented polymer, especially OPET or BOPP. The configuration of the present invention guarantees reliable and reproducible tear characteristics, even in the case of film packaging using film materials such as OPET and BOPP, which tend to produce unforeseen tears. be able to. The transverse seal forming the end edge can be split in a simple and fixed position, and the tear is guided between two weakening lines provided next to each other accordingly.

  The weakening line is a linear or striped region of the film material and has a low mechanical durability (Widerstandsfaighit). The weakening lines can control how the tears in the film material spread. This is because the tear tends to grow toward the region with the lowest mechanical strength. Weakened lines can be created, among other things, by reducing the thickness or strength of the material and / or changing the material properties locally. This can be done when producing the film material or afterwards. In particular, the weakening line may be formed intermittently in one connection or in sections. Here, the intermittent weakening lines divided into sections are intended in the present invention to be provided as perforations having a pattern that is uniformly repeated over their entire length in the longitudinal direction.

  Each of the at least two weakening lines is provided on the same outer surface of the front part or the rear part according to the purpose. Preferably, the weakening lines have the same penetration depth into the material of the front part or the back part and, in the case of a multilayer structure, extend into the same partial layer. Particularly preferably, the at least two weakening lines are made the same.

  According to the present invention, a number of weakening lines are provided on both the front surface portion and the back surface portion, so that the film packaging body can be opened particularly advantageously. At this time, the film package is split along the longitudinal direction by cleaving between the two weakening lines. Thus, when the bar-shaped product is partially opened, only a part of the stick-shaped product pops out from the opening portion and can be consumed little by little. For example, a stick-shaped food can be eaten like a banana peeled off. Alternatively, half of the bag wrap can be completely separated and the product can be removed in the transverse direction.

  This is particularly advantageous when the length (spread) in the longitudinal direction (length extending in the longitudinal direction) of the film package is longer than that in the transverse direction (length extending in the lateral direction). A particular advantage can be obtained when the length extending vertically is longer than 1.5 times the length extending horizontally, in particular more than twice. This is because, in this case, even if the gap when the rift spreads is slight, the film package may not be separated vertically.

  By laying at least two weakening lines extending in the longitudinal direction in parallel on the front part and the back part, respectively, in the film package according to the present invention, it is roughly despite the hard film component (Folienkone). Straight tear properties can be guaranteed. At the same time, the risk of tearing along the weakening line during the packaging process is minimal. This is because the film material is mostly placed in tension and is reinforced by a transversely extending joining device to create a transverse seal. There is little vertical shear or bending moment on the front or back that can initiate a tear. This is even more true when the device direction in which the film material is conveyed during the packaging process matches the longitudinal direction of the front and back portions.

  The transverse seal preferably extends over the entire width of the front and back portions. In this way, a closed end can be obtained at this end edge without using any other auxiliary means. In addition, the film package is reinforced over its entire width by means of transverse seals. Depending on the area of use, transverse seals can be made using heat sealing or cold sealing. Adhesive bonding is also possible within the scope of the present invention.

  Particularly preferably, a tear assisting portion is provided at the side of the transverse seal. Thereby, it is easy to make a tear in the horizontal seal. The tear assisting portion can be formed, for example, as at least one cut edge (notch) or a zigzag cut edge. This may extend over the entire width of the transverse seal, or may be limited to the portion where the tear should be suitably inserted. In particular, the crack assisting portion is provided only in the portion between the weakening lines. It is not provided at the peripheral portion between the outer edge on the side of the film package and the weakening line closest thereto.

  Particularly preferably, the weakening lines are aligned parallel to each other. As a result, a corridor having a certain width can be used to spread the tear.

  It is particularly preferable that at least three weakening lines are provided at equal intervals in the lateral direction on the front part and / or the back part. Thereby, the place which makes a tear can be left to a user in a wider range. Nevertheless, once a tear is made, the tear continues to be guided substantially straight through the channel formed by the two nearest weakening lines until the opposite end edge of the film package is reached.

  Preferably, the weakening lines are distributed over the entire width of the front part and / or the back part in the transverse direction. Thereby, the user is particularly free to choose which part he wants to tear open the package.

  In another preferred form, the weakening line is limited to a certain area in the transverse direction. This indicates that the user has to tear the film package in a limited area. This can be further supported by appropriately positioned tear aids and / or visual landmarks in the area. This is especially important when the product must be touched only directly by its purpose. If necessary, the area where the weakening line is provided is approximately half. Similarly, it is also practical that a weakening line is provided on one or both of the outer thirds of the film package, or in the central portion.

  Preferably, at least the outer, i.e. the weakening line closest to the side packaging edge is aligned parallel to the longitudinal direction. This causes the tear to spread out so that it never reaches the edge of the side bag. Thus, complete division of the film package is possible.

  Particularly preferred is when each weakening line on the front side is aligned so that it is exactly over the weakening line on the back side. Thereby, the same boundary condition (Randbeding ung) can be obtained in the formation of a tear on both the front and back portions.

  In a preferred form, the front and back portions are formed from a single film portion. This film portion is uniformly provided with weakening lines over its entire width. Depending on the purpose, the film part may be a single film, either via a so-called fins seal where one part of the inner surface of the film part is joined to another part of the inner surface of the film part, or via an overlapping part. It may be said that it is closed to a tube (film cylinder).

  Preferably, the front part and the rear part are joined at at least one side edge by a side fold. The side folds are formed from the same film part as the front and / or back part or alternatively from separate film parts. The side folds increase the bag internal space and improve the stackability. Preferably, the side folds are formed without weakening lines so that the spread of the tear is limited on the front and back portions. Alternatively or additionally, the film package may be equipped with a stand bottom on the side opposite to the transverse seal.

  A preferred film material for forming a film package according to the present invention comprises an outer layer made of BOPP having a thickness of 20 μm, and a thickness of 20 μm which is joined via said extrapolation and a laminated adhesive layer And a multi-layer laminate having an inner layer made of metal-coated biaxially oriented polypropylene (metBOPP). The metal-coated polymer layer functions as a barrier against intrusion of water vapor and oxygen. The outer layer can be printed on the inner surface facing the inner layer. The outer layer is substantially transparent so that the print is visible from the outside, while the print is protected from damage by the outer layer. When the film package has to be closed by a cold sealing method, a single cold sealing adhesive may be applied to the inner surface of the inner layer.

  The present invention is a method for packaging a product in a film packaging body, and supplies a film material for forming a front surface portion extending in a longitudinal direction and a lateral direction and a back surface portion expanding in a longitudinal direction and a lateral direction. This is based on a method in which a packaging internal space is formed between the front surface portion and the back surface portion. The product is arranged between the front part and the back part in the package interior space. Thereafter, the package interior space is sealed by at least one horizontal seal that extends in the transverse direction and joins the front surface portion to the back surface portion. According to the present invention, at least two weakening lines each extending in the longitudinal direction are provided on the front surface portion and the back surface portion, and these weakening wires extend in the longitudinal direction over the entire length of the front surface portion and the back surface portion. ing. The method is particularly suitable for providing a film package according to the invention.

  In a preferred form, the film material for the front and back portions is supplied endlessly. After packaging, the film package containing the product is cut to a predetermined length after or during the formation of the transverse seal. At this time, the film material is separated at the part of the transverse seal. Alternatively, it is also possible to cut the film material only partly, in particular in the form of perforations. This creates a target break location that can be opened later by the user or machine.

  Depending on the purpose, the tear line extends entirely or partially through the seal. As a result, portions where the front surface portion and the back surface portion are joined to each other remain on both sides of the cut line. As a result, a part of the transverse seal that closes the bag inner space of the film package simultaneously serves as a leg seal (Fussiegelnaht) for separating the film bags that are manufactured thereafter in a continuous process. Fulfill. At the same time, by forming the terminal end of the film packaging body in the longitudinal direction, the front and back portions cannot be separated from each other, and these can be split together.

  Furthermore, it is suitable for the purpose that the film wrapping body is provided with a split auxiliary portion at the end edge portion. This can be formed, for example, as a zigzag cutting part. Particularly preferably, the cutting part may be formed at the same time when the continuously manufactured film package is cut off. Preferably, the crack assisting portion is provided so that the function can be exerted between the weakening lines extending in the longitudinal direction. This makes it easier to start tearing between at least two weakening lines, so that it is impossible for the tear to subsequently deviate to the side edge of the film package without control.

  Preferably, the film material for the front part and / or the back part with pre-made weakening lines is supplied as a semi-finished product. Thereby, the packaging equipment can be configured compactly as a whole, since the film material does not have to be first manufactured and / or post-treated. In addition, as the film material, a multi-layered body prepared in advance in which weakening lines are formed on the inner layer or the inner layer boundary surface can be used particularly easily. Thus, the film laminate gives a high-value impression with a uniform appearance. If the longitudinal direction coincides with the machine direction, the feeding device can be configured much more simply. This is because the front surface portion and the back surface portion do not have to be arranged at specific positions and postures.

  In another preferred form, the weakening lines are placed on the front and / or back side before packing the product. Laser cutting, cutting, mechanical material removal (so-called scraping) or mechanical stamping (Pragen) are particularly suitable for this. Again, it is advantageous if the longitudinal direction coincides with the machine direction. This is because weakening lines can be entered continuously and without synchronization.

  It is suitable for the purpose that a film tube having a front part and a back part is formed from a single material web before packing the product. The film tube can be closed by a so-called fin seal or by a lap wrap bonding.

  In the following, the present invention will be described with reference to the drawings showing only examples.

It is a top view of the film packaging body by this invention. FIG. 2 shows a method according to the invention in the form of a VFFS process. It is a figure which shows the form of the method by this invention as an HFFS process. It is a figure which shows the opened film packaging body in other embodiment. It is a figure which shows the film packaging body partially opened in other embodiment.

  FIG. 1 shows a film packaging 1 according to the invention having a front face 2 extending in the longitudinal direction l and the transverse direction q. Here, the length (Erstrecking) of the film package 1 in the longitudinal direction 1 (length extending in the longitudinal direction) is longer than the length (length extending in the lateral direction) in the lateral direction q. A back surface portion 3 is arranged behind the front surface portion 2 in a state in which the front surface portion 2 cannot be seen. Similarly, the back surface portion 3 extends in the longitudinal direction l and the transverse direction q. The front surface portion 2 and the back surface portion 3 are joined to each other at the edge 4 on the side of the film packaging body 1 so as to form a film tube that goes around. In the upper and lower terminal edge portions 5, the front surface portion 2 and the back surface portion 3 are joined to each other via a lateral seal 6. Thereby, the packaging internal space provided between the front part 2 and the back part 3 is sealed. According to the present invention, a large number of weakening lines 7 are provided on both the front face 2 and the back face 3, and these weakening lines extend in the longitudinal direction 1 over the entire front face 2 and the entire back face 3. It extends to.

  In the present embodiment, the horizontal seal eyes 6 extend in the lateral direction q over the entire width of the front surface portion 2 and the back surface portion 3 both on the upper side and the lower side. The end edge 5 is provided with a crack assisting portion 15 in the form of a zigzag cut portion that enters the lateral seal 6. Similarly, the zigzag cutting part extends in the transverse direction q over the entire width of the film package 1. The weakening lines 7 are provided in parallel to each other and in parallel to the longitudinal direction l of the film packaging body 1, and are distributed at equal intervals in the lateral direction q between the outer edges 4 over the entire width of the film packaging body 1. .

  FIG. 2A shows an example of a method according to the invention by which an embodiment of a film package according to the invention can be produced. A film material 8 for forming both the front part 2 and the rear part 3 of the film package 1 is drawn out from the roll as a semi-finished product. In this case, the web of the film material 8 in which the weakened wire 7 extending in parallel with the conveying direction of the film material 8 is provided in advance on the film material 8 is then wound, whereby the side edge thereof By bringing the portions 9 into contact with each other, the inner surface of the film material 8 following the side edge portion 9 comes into contact with the surface. The film material joins itself by a so-called fin seal at this portion, and a film tube 10 is formed. A product 14 that can be poured into it can be put into this using the filling funnel 11. In the combined subsequent cutting and sealing station 12, a transverse seal 6 is formed in the film tube 10 so as to cross the conveying direction, and at the same time, it is divided approximately in the middle along its extending length. Thereby, the film packaging body 1 by this invention is cut | disconnected from the film tube 10, and this is simultaneously sealed by the upper horizontal seal. Similarly, leg seals are formed in synchrony, which seals the remaining film tube 10 and thereby forms the base of the film bag 1 that is subsequently manufactured.

  No synchronization between the movement of the material web 8 and the sealing station 12 is necessary. This is because the weakening line 7 extends in any direction in the transport direction. Thereby, the film packaging body 1 of a different magnitude | size can be manufactured from the same film material 8 by changing the repetition frequency (Taktun) of a sealing station with respect to the conveyance speed of the film material 8. FIG.

  FIG. 2B shows an embodiment of an alternative method for an HFFS (horizontal FFS) (horizontal pillow wrap) facility. In this example, the film materials provided for forming the front part 2 and for forming the back part 3 are supplied as separate film webs 8, 8 '. In both cases, the weakening line 7 already extending in the transport direction is provided. The product 14 is placed on the film material 8 for forming the back surface portion 3 guided on the conveyor belt 13 by a supply unit (not shown). Next, this is covered with a film material 8 ′ for forming the front surface portion 2. The front surface portion 2 and the back surface portion 3 are joined to each other by a vertical seal at the side edge portion 4. Next, in the combined cutting / sealing station 12, a horizontal sealing line extending so as to cross the conveying direction is put, and the sealing line joins the front surface part 2 to the back surface part 3. At the same time, the transverse seal eyes 6 are divided along the longitudinal direction in order to cut the individual film packages 1 into a predetermined length.

  3A and 3B show in two embodiments possible variations for opening a film package according to the invention. In FIG. 3A, both the weakening line 7 and the break assisting portion 15 are provided only on the left half of the film package 1. The film package can be divided in this region by a tear that begins to tear at the break assisting portion 15 and extends at or between the weakening lines 7. Thereafter, the smaller part of the film package is removed, and in this embodiment, a rectangular product 14 protrudes laterally from the package internal space between the front surface portion 2 and the back surface portion 3. The product 14 can already be used in this state or can be taken out in the transverse direction q.

  In another modification according to FIG. 3B, the weakening line 7 and the crack assisting portion 15 are provided only in the middle third of the front surface portion 2 and the back surface portion 3 of the film packaging body 1. The film package 1 is partially split from the end edge 5 and is separated at the upper edge. Thereby, in the present embodiment, the rod-shaped product 14 protrudes from the opening portion in the longitudinal direction l. Thus, the product 14 can be handled safely without touching.

Claims (15)

A film packaging body (1) having a front surface portion (2) extending in a longitudinal direction (l) and a lateral direction (q) and a back surface portion (3) extending in a longitudinal direction (l) and a lateral direction (q). ,
The front surface portion (2) and the back surface portion (3) are joined to each other via a horizontal seal mesh (6) extending in the lateral direction (4), and the horizontal seal mesh is the film package (1). In the film package forming the terminal edge (5) of
On the front surface part (2) and the back surface part (3), at least two weakening lines (7) each extending in the longitudinal direction (l) are provided. 2) The film package characterized by extending in the longitudinal direction (1) over the entire back surface (3).   The film package (1) according to claim 1, characterized in that the transverse seal (6) extends over the entire width of the front part (2) and the back part (3).   The film package (1) according to claim 1 or 2, characterized in that a tear assisting portion (15) is provided in the transverse seal (6).   4. The film package (1) according to any one of claims 1 to 3, characterized in that the weakening lines (7) are aligned parallel to each other.   At least three weakening lines (7) are respectively provided on the front surface part (2) and the back surface part (3), and the weakening lines (7) are provided on the front surface part (2) and / or the back surface part (3). 5) In the lateral direction (q) above, the outermost left weakening line and the outermost right weakening line are provided at equal intervals. The film package (1) as described in any one of Claims.   The weakening line (7) is distributed over the entire width of the front part (2) and / or the rear part (3) in the transverse direction (q). The film package (1) described.   6. The film package (1) according to any one of claims 1 to 5, characterized in that the weakening line (7) is limited to a certain region in the transverse direction (q).   The film package (1) according to any one of claims 1 to 7, characterized in that at least the outer weakening line (7) is aligned parallel to the longitudinal direction (l).   The film packaging body (1) according to any one of claims 1 to 8, characterized in that the front part (2) and the back part (3) are formed from a single film part.   The front part (2) and the back part (3) are joined to each other at at least one side edge (4) by a side fold. The film package (1) described. A film material (8) for forming a front part (2) extending in the longitudinal direction (l) and the transverse direction (q) and a back part (3) extending in the longitudinal direction (l) and the transverse direction (q). By supplying, a packaging internal space is formed between the front surface part (2) and the back surface part (3), and the product is arranged between the front surface part (2) and the back surface part (3) in the packaging internal space. Then, the package interior space is sealed at least by a lateral seal (6) extending at least in the transverse direction (q) and joining the front face (2) to the back face (3). In the method (14) of packaging the product in the described film package (1),
The supplied film material (8) for forming the front part (2) and the supplied film material (8, 8 ') for forming the back part (3) are each extended in the longitudinal direction. At least two weakening lines (7) are provided, and the weakening lines extend in the longitudinal direction over the entire length of the front part (2) and the back part (3). A method (14) of packaging the product in the body (1).   Film material (8, 8 ') for the front part (2) and back part (3) is supplied endlessly, and the film package (1) in which the product (14) is contained The method according to claim 11, characterized in that it is cut to a predetermined length during or after forming 6).   12. The film material (8, 8 ′) for the front part (2) and the back part (3) with pre-made weakening lines (7) is supplied as a semi-finished product. 12. The method according to 12.   Before filling the product, the weakening lines (7) are put on the front part (2) and the back part (3), in particular by laser cutting, cutting, mechanical material removal or mechanical stamping. Item 13. The method according to Item 11 or 12.   12. A film tube (10) having a front part (2) and a back part (3) is formed from a single web of film material (8) before packing the product (14). The method as described in any one of thru | or 14.

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