JP4957097B2 - Easy-open refill bag - Google Patents

Description

  The present invention relates to an easily-openable refill bag in which contents such as seasonings, cosmetics, detergents and toiletries are sealed and packaged, and the contents are transferred to another container at the time of use. In order to facilitate the work of transferring the bottle to another container such as a bottle, the spout is formed in a stable manner without the need for separate processing work such as forming a spout by heat sealing in advance or attaching parts of another member such as a spout. The present invention relates to an easily openable refill bag that can be refilled easily.

  Conventionally, it has been pointed out that plastic bottles tend to cause an increase in garbage and environmental destruction by performing disposal when they are not needed. Under these circumstances, in recent years, packaging bags made of soft packaging materials that have been selected for consideration of environmental impact have been used for products such as seasonings, cosmetics, detergents, and toiletries. ing.

  While this packaging bag is excellent in compressibility and flexibility, it has problems in easy opening of the bag, content pouring property, and independence when displaying products.

  On the other hand, plastic molded containers such as plastic bottles have excellent handling properties when used, but their compressibility and flexibility when not in use are impaired, and the molding process of the container and the filling of the contents In the process, there were difficulties such as requiring large-scale equipment.

  Therefore, in recent years, packaging bags with spouts that take into account easy-openability of bags, content pouring properties, and self-sustainability at the time of product display have varied from refills for single-use use to those with resealability. It is used in various application fields.

  In addition, the shape of the packaging bag is also from a general rectangular shape, with a bottom film for the bottom portion interposed between the lower portions of the packaging bag composed of a substantially rectangular front surface film and a back surface film. A packaging pouch with a shape called a standing pouch that has a self-supporting property by laminating the surface film and the backside film so that the shape of the packaging bag becomes flat after pouring out the contents. is there.

  In these packaging bags, when the contents are transferred to a bottle or the like, in the case of a general rectangular shape, as shown in FIG. 7, the upper corners of the bag (B) are set to the side end (2) and the upper end. Through the notch (7) provided in the part (3), the user can arbitrarily cut in the linear direction obliquely. However, with such a shape, since the spout (1) cannot be inserted into the bottle during refilling work, the contents cannot be easily transferred by spilling out of the bottle. It was.

  Therefore, recently, in the case of such a refill bag, the upper corner of the packaging bag is used as a spout part, and when the contents are transferred, the spout part is cut and opened. Is inserted into the opening of the bottle container.

  Therefore, a hollow cylindrical nozzle made of synthetic resin or the like is attached to the spout portion in advance (see, for example, Patent Document 1), and a spout flow path is formed by simply raising the film on the spout portion. For example, there is proposed a device in which a space portion is formed in advance (see, for example, Patent Document 2).

  However, there are the following inconveniences even in the above-described device made for the purpose of stably taking out the contents. That is, in the case where the hollow cylindrical nozzle is previously provided in the spout portion, a special process for arranging the nozzle in the manufacturing process of the packaging bag is required, which causes an increase in cost. And in the obtained packaging bag, the nozzle arrangement | positioning part of a spout part will be in the state raised greatly, and packaging will become unstable. Also, extra space is required when transporting or storing a large amount of packaging bags before filling. On the other hand, in the case where a space portion due to the rising of the film is formed in the spout portion, the spout portion is easily bent, and the spout passage through which the contents pass is not stable at the time of spout.

  Next, as a proposal considering easy-opening properties, a proposal (e.g., easy opening) by forming a cut or a half cut only in the film base material layer of the laminate comprising a film base material layer and a sealant layer (for example, However, it is not practical and stable to form a tearing line for opening only in the film base material layer.

Prior art documents are shown below.
JP-A-5-132069 JP-A-8-2538 JP 2003-137308 A

  The present invention is intended to solve such problems of the prior art, and facilitates the work of transferring contents such as seasonings, cosmetics, detergents, toiletries and the like to other containers such as bottles. An easy-to-open refill bag that can be refilled stably and easily without the need for separate processing operations such as pre-forming the spout by heat sealing or mounting parts of other members such as spouts The purpose is to provide.

The present invention has been made to solve the above problems, and the invention according to claim 1 of the present invention includes at least a film base layer (21) and a sealant layer (25) from the outer surface side. In the easily openable refill bag (B) made of the laminated body (A) having the opposite peripheral parts thermally fused, a spout (1) is formed at one corner of the bag (B) after opening. An easy opening portion (6) is provided from the side end portion (2) to the upper end portion (3) of the bag (B), and the easy opening portion (6) is the storage portion (4) of the bag (B). ) Is an easily openable refill bag characterized in that it is curved in a curved shape with a convex shape (5) in the outward direction.

  The invention according to claim 2 of the present invention is the easily openable refill bag according to claim 1, wherein the easily openable portion (6) is formed by laser processing. It is a replacement bag.

The invention according to claim 3 of the present invention is the easily openable refill bag according to claim 1 or 2, wherein at least the side end portion (2) and the upper end portion (3) of the easily openable portion (6). It is an easily openable refill bag characterized in that a notch (7) is formed in either one .

  The invention according to claim 4 of the present invention is the easily openable refill bag according to any one of claims 1 to 3, wherein the easily openable portion (6) has an upper end portion from a side end portion (2). It is an easily openable refill bag characterized in that the height (H) of the apex (9) of the convex shape (5) with respect to the cutting line (8) over (3) is 2.0 mm or more.

  The invention according to claim 5 of the present invention is such that the shape of the easy-open refill bag according to any one of claims 1 to 4 is a folded portion (11) structure in the lower part (10) of the bag (B). It is a standing pouch provided with an easily openable refill bag.

  The easily openable refill bag according to the present invention is an easily openable refill bag comprising a laminate having at least a film base layer and a sealant layer from the outer surface side and heat-sealing the opposing peripheral portions. In this case, a curved easy-opening processing portion is formed in one corner of the bag, which is formed into a spout after opening from the side end portion to the upper end portion of the bag and is convex outward from the bag storage portion. In order to facilitate the work of transferring contents such as seasonings, cosmetics, detergents, toiletries, etc. to other containers such as bottles, a spout is formed in advance by heat sealing, or a spout, etc. It is possible to refill stably and easily without performing another processing operation such as mounting parts of members. Also, the production cost is low.

  Embodiments of the present invention will be described in detail with reference to FIGS.

  FIG. 1 is a plan view showing an embodiment of an easily openable refill bag according to the present invention, and FIG. 2 is a plan view showing a state in which a spout of the easily openable refill bag according to the present invention has appeared. FIG. 3 is a side sectional view showing one embodiment of the layer structure of the laminate (A) used in the easy-open refill bag according to the present invention, and FIG. 4 is an easy-open property according to the present invention. FIG. 5 is a side cross-sectional view showing another embodiment of the layer structure of the laminate (A) used for the refill bag, and FIG. 5 shows a cross-sectional shape that crosses the opening direction of the easy-open processing portion formed by laser processing with a kalide beam. 6 is a cross-sectional view taken along line XX in FIG. 5 (showing a cross-sectional shape along the opening direction of the easy-open portion of FIG. 5).

  The easy-open refill bag of one embodiment of the present invention is an easy-open refill for packaging contents such as seasonings, cosmetics, detergents, toiletries, etc., and transferring the contents to another container at the time of use. As shown in FIG. 1, a peripheral portion made of a laminate (A) having at least a film base layer (21) and a sealant layer (25) is heat-sealed as shown in FIG. In the easily openable refill bag (B), the upper end portion from the side end portion (2) of the bag (B) that forms a spout (1) after opening at one corner of the bag (B) An easy-opening refill bag (B) provided with a curved easy-opening part (6) having a convex shape (5) outwardly from the housing part (4) of the bag (B) over (3) It is.

  As the easy-opening processing part (6), for example, an I-shaped or V-shaped notch or spout (1) formed in the side end part (2) and / or the upper end part (3) of the bag (B) is formed. Perforations and scores that cross the region to be processed, other thinned weakened parts, or combinations thereof.

  Examples of the method for forming such an easy-opening portion (6) include (1) laser processing using a focus beam or a kaleido beam, (2) mechanical processing using a cutter, a grindstone, etc., and (3) thermal processing using a heat bar. It is done.

When forming the easy-opening part (6) by the I-shaped or V-shaped notch described above, a film having linear tearability is used for the film base layer (21) on the outer surface constituting the laminate (A). However, it is not easy to open the bag diagonally in a straight line. Moreover, when forming the easy opening process part (6) like a perforation and a score which cross | intersects the area | region which forms a spout (1), easy opening process which penetrates a laminated body (A) completely. If the part (6) is formed, it is not preferable because the content leaks or the drop strength after filling the content decreases depending on the type of the content filled in the packaging bag. In such a case, it is conceivable to provide the easy-open processing part (6) only on the outer film base material layer (21) constituting the laminate (A), but the quality is not stable. Not practical.

  The easy-open processing part (6) that crosses the region where the spout (1) is formed has an unstable processing state in laser processing of the focus beam, generation of fumes, and a shift in processing position between the front and back when used as a packaging bag. In order to avoid problems such as machining waste generated by machining, powder generation of packaging material, and unstable processing due to adhesion of resin due to heat processing of the heat bar, it is preferable to form by laser processing with a kalide beam. And it is preferable to form a plurality of the easy-open processing parts (6) on the film base material layer (21) and / or the sealant layer (25) on the outer surface of the laminate (A) by laser processing with a kalide beam.

  Here, an example of forming the easy-open processing part (6) by laser processing with a kalide beam will be described with reference to FIGS.

  For example, as shown in FIG. 5, the easy-opening processing part (6) has a valley part (30) and a peak part (31) in a state adjacent to each other in a direction crossing the opening direction or at a small interval. It is formed as a weakened layer composed of a plurality of pairs, and the depth of the valley (30) and the height of the peak (31) change, and gently, along the opening direction (C) as shown in FIG. It is formed so that the depth of (30) and the height of the mountain part (31) change.

  Formation of this easy-opening process part (6) can be performed simultaneously with the slitter process of a laminated body (A), for example, and can also be performed at the time of bag making with a bag making machine. Furthermore, before lamination | stacking of a laminated body (A), it can also carry out beforehand to the film base material layer (21) and / or sealant layer (25) of the outer surface which comprise this laminated body (A).

  Next, when opening the easy opening portion (6), in order to facilitate the opening operation, the side opening portion (2) and / or the upper end portion (3) of the easy opening portion (6) are provided. It is preferable that the notch (7) is formed.

  The notch (7) may be any one of a straight line, a perforation line, a V-shape, etc., and its size is arbitrary, but usually it should be a trigger for opening, so that it is about 1 mm to 10 mm. Preferably, the thickness is about 2 mm to 5 mm.

  Moreover, as an engraving method, it can engrave with a normal knife, a cutter, a grindstone, a polishing roll, a laser beam, etc. The notch (7) can be engraved by, for example, a method of engraving the notch (7) simultaneously with the formation of a seal portion by heat-sealing the peripheral edge during bag making by a bag making machine. .

  Next, when using the easily openable refill bag (B) according to the present invention to refill the contents into a bottle or the like, the notch (7) is used as a trigger for the easy opening processing portion. (6) is opened and the contents are refilled into a bottle or the like. At this time, as shown in FIG. 2, by causing the spout (1) having the apex (9) of the convex shape (5) to appear, It becomes an insertion guide for the bottle mouth. That is, it functions as a simple funnel and can be refilled stably.

  Moreover, in order to perform the stable refilling operation | work to the bottle etc., the convex shape with respect to the cutting line (8) from the side edge part (2) of the said easy opening process part (6) to an upper end part (3) ( The height (H) of the vertex (9) of 5) is preferably 2.0 mm or more. If the height (H) is less than 2 mm, the role of the insertion guide for the bottle mouth cannot be achieved, and stable refilling cannot be performed.

  By the way, the shape of the easily openable refill bag (B) according to the present invention is not particularly limited, and packaging bags such as a three-side seal type, a pillow type having a back seal portion, a gusset type, and a standing pouch type are used. Among them, when not stored in an outer carton, a standing pouch type in which a folded portion (11) structure is provided in the lower part (10) of the bag (B) is considered in consideration of display at a store. preferable.

  Next, as shown in FIG. 3, the easily openable refill bag (B) according to the present invention comprises at least a film base layer (21) and a sealant layer (25) from the outer surface side. ) Through a laminate (A).

  Examples of the material for the film base layer (21) include polyesters such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polybutylene terephthalate (PBT), polyethylene (PE), polypropylene (PP), Polyolefin such as polystyrene (PS), polyamide (PA) such as nylon-6 and nylon-66, polycarbonate (PC), polyacrylonitrile (PAN), polyimide (PI), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC) ), Stretched or unstretched films such as polyvinyl alcohol (PVA), ethylene-vinyl alcohol copolymer (EVOH), polyether sulfone (PES), polymethyl methacrylate (PMMA), nylon-6 / metaxylylene Extruded film amine nylon 6 copolymer, polypropylene / ethylene - may either vinyl alcohol copolymer co-extruded film, or be a composite film in which the laminated two or more films of these.

  However, as described above, in order to open the easily openable refill bag (B) more stably in a straight line, the film base material layer (21) may be made of a film having linear tearability. preferable. Examples of the film having linear tearability include a uniaxially stretched film stretched in one direction and a biaxially stretched film having different longitudinal and transverse stretch ratios. In the present invention, a biaxially stretched film having linear tearability is preferred.

  Usually, a biaxially stretched polyethylene terephthalate film (OPET), a biaxially stretched polyamide film (ON) or the like is frequently used. A film having linear tearability is linear in at least one of the longitudinal (longitudinal) direction of the film (MD (machine direction) direction) and the lateral (transverse direction) direction (TD (transverse direction) direction). It has a performance (easy tearing property) that can be easily torn.

  The biaxially stretched polyethylene terephthalate film (OPET), which is a film having linear tearability, is, for example, polybutylene terephthalate (modified) containing 5 to 20% by weight of polytetramethylene glycol (PTMG) units having a weight average molecular weight of 600 to 4000. A biaxially stretched polyethylene terephthalate film (OPET) manufactured using a raw material obtained by mixing PBT) and polyethylene terephthalate (PET) in a ratio of PET / modified PBT = 70/30 to 95/5 (weight ratio). Can be mentioned.

  Next, as the biaxially stretched polyamide film (ON), for example, aliphatic polyamide (PA) and polymetaxylene adipamide (MXD6), PA / MXD6 = 80/20 to 95/5 (weight ratio) Biaxially stretched polyamide film (ONy) produced using raw materials mixed at a ratio of

  In addition, the thickness of the film base layer (21) is preferably in the range of 10 to 50 μm, more preferably in the range of 10 to 30 μm, in consideration of workability.

Next, for example, a low density polyethylene resin (LDP) is applied to the innermost sealant layer (25).
E), medium density polyethylene resin (MDPE), high density polyethylene resin (HDPE), linear low density polyethylene resin (L-LDPE), polypropylene resin (PP), ethylene-propylene copolymer (EP), ethylene- α-olefin copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-methacrylic acid ester copolymer, ethylene-acrylic acid ester copolymer, ionomer resin, ethylene -Resin such as vinyl acetate copolymer (EVA), or a film obtained by forming a film of these resins can be used.

  The thickness of the sealant layer (25) is preferably in the range of 15 to 200 μm, more preferably in the range of 30 to 170 μm, in view of physical properties such as strength and workability.

  Next, a beautiful pattern printing layer (22) can be provided on the film base layer (21) by a gravure printing method for the purpose of improving the sales promotion effect of the product.

  Next, in this invention, as shown in FIG. 4, you may provide an intermediate | middle layer (24) between the said film base material layer (21) and the said sealant layer (25), and the said intermediate | middle layer (24 ) Is usually provided when the film base layer (21) and the sealant layer (25) alone cannot sufficiently function as the bag (B).

  The above-mentioned functions include gas barrier properties, mechanical toughness, bending resistance, puncture resistance, impact resistance, wear resistance, cold resistance, heat resistance, chemical resistance, etc., and are required as the bag (B). These functions are achieved by providing the intermediate layer (24).

  Hereinafter, the easily openable refill bag (B) according to the present invention will be described in more detail with specific examples, but is not limited thereto.

<Example 1>
As shown in FIG. 3, the laminate (A) used for the easy-openable refill bag (B) according to the present invention is biaxially stretched with a thickness of 15 μm on the outer film base layer (21). Nylon film (ON) is used, the innermost sealant layer (25) is a 130 μm thick linear low density polyethylene film (L-LDPE), and the adhesive layer (23) is urethane-based. Using an adhesive, it was produced by a dry lamination method.

  Using the laminate (A) made of the film base layer (21) and the sealant layer (25) produced as described above, as shown in FIG. 1, the finished size of the bag is 130 mm wide × height The upper edge of the bag (B) for opening the spout (1) after opening at the upper left corner of the bag (B) at 260 mm, the folding tape width of the bottom tape 35 mm × 2 = 70 mm (deployed width) A convex shape (5) is formed outwardly from the storage portion (4) of the bag (B) from the side end portion (2) at a position 40mm below the upper portion to the upper end portion (3) at a position 40mm to the right from the left edge. The curved easy opening portion (6) having a width of 3 mm was provided by laser processing using a kaleido beam. At that time, the height (H) of the vertex (9) of the convex shape (5) with respect to the cutting line (8) from the side end (2) to the upper end (3) of the easy-opening processed part (6), Set to 5.0 mm. Furthermore, a standing pouch-type easy-open refill bag (B) formed by forming a notch (7) having a length of 3 mm at the side end (2) and the upper end (3) of the easy-open processing part (6). ) Was produced.

  Next, 300 ml of water was filled and sealed in such an easy-open refill bag (B) to obtain an easy-open refill bag (B) containing 300 ml of water before refilling.

  Below, the comparative example of this invention is demonstrated.

<Comparative Example 1>
In Example 1, as shown in FIG. 7, a standing pouch-type easily openable refill bag (B) was produced in the same manner as in Example 1 except that the easy opening part (6) was not formed. An easily opened refill bag (B) containing 300 ml of water before refilling was obtained.

<Evaluation>
Using the easy-opening refill bag (B) containing 300 ml of water obtained in Example 1 and Comparative Example 1, the monitor performed each refilling operation, and which bag (B) was superior. It was evaluated whether there was sex. The results are shown in Table 1. (Each n = 30).

表１は、実施例１および比較例１で得られた水３００ｍｌ入りの易開封性詰替え用袋（Ｂ）を用いたそれぞれの優位性の評価結果を記す。（各ｎ＝３０）。

Table 1 shows the evaluation results of the respective advantages using the easily openable refill bags (B) containing 300 ml of water obtained in Example 1 and Comparative Example 1. (Each n = 30).

<Evaluation results>
Example 1 had 25 superiority and good refillability. In Comparative Example 1, there were only 5 with superiority, and refillability was poor.

It is a top view which shows one Example of the easily openable refill bag which concerns on this invention. It is a top view which shows the state which made the spout of the easily openable refill bag which concerns on this invention appear. It is a sectional side view which shows one Example of the laminated constitution of the laminated body used for the easily openable refill bag which concerns on this invention. It is a sectional side view which shows the other Example of the laminated constitution of the laminated body used for the easily openable refill bag which concerns on this invention. It is a sectional side view which shows the cross-sectional shape which cross | intersects the opening direction of the easy-opening process part formed by the laser processing by a kalide beam. FIG. 6 is a cross-sectional view taken along the line XX of FIG. 5 (showing a cross-sectional shape along the opening direction of the easy-open processing portion of FIG. 5). It is a top view which shows one Example of the conventional easily openable refill bag.

Explanation of symbols

A ... Laminated body B ... Easy-opening refill bag C ... Opening direction H ... Height 1 ... Spout 2 ... Side end part 3 ... Upper end part 4. ················································ 6 ··································································································· 8 Film base layer 22 ... Print layer 23 ... Adhesive layer 24 ... Intermediate layer 25 ... Sealant layer 30 ... Valley part 31 ... Mountain part

Claims (5)

In an easily openable refill bag comprising a laminate having at least a base film layer and a sealant layer from the outer surface side and heat-sealing the opposing peripheral portions, at one corner of the bag, after opening, the spout An easy-opening portion is provided from the side end portion to the upper end portion of the bag, and the easy-opening processing portion is bent in the storage portion of the bag and has a curved shape that is convex outward . An easily openable refill bag characterized by that.   The easy-opening refill bag according to claim 1, wherein the easy-opening part is formed by laser processing. The easily openable refill bag according to claim 1 or 2, wherein a notch is formed in at least one of a side end and an upper end of the easy opening portion.   The height of the convex vertex with respect to the cutting line from the side end portion to the upper end portion of the easy-opening processing portion is 2.0 mm or more. Openable refill bag.   The easily openable refill bag according to any one of claims 1 to 4, wherein the easy openable refill bag is a standing pouch in which a folded portion structure is provided in a lower portion of the bag. .

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