JP4287252B2 - Manufacturing method of package with chuck tape - Google Patents

Description

The present invention relates to a method of manufacturing a package with a chuck tape, and more particularly, a package having a substantially tetrahedral shape having four substantially triangular surfaces and having a chuck tape that can be resealed at the mouth, and includes a tea pack. A package that is useful for consumers to take out and use stored contents such as confectionery in small quantities. Fillability, ease of removal, bag sealing, opening, stability and production. The present invention relates to a method for manufacturing a package with a zipper tape having excellent properties.

Conventionally, various types of flexible packaging bags such as plastic films suitable for filling and packaging foods and drinks, miscellaneous goods, pharmaceuticals, industrial products, and other articles have been developed and used.
For example, for the packaging of contents that consumers use to take out the contents stored in small portions, the bag is once opened as a packaging bag that can be stored with the bag mouth sealed except when removing the product Later, in order to facilitate re-sealing and improve usability, a bag having a zipper tape attached to the mouth of the bag is used.

For example, a bag made of a laminated film in which a sealant layer is laminated on the innermost layer, and the body portion of the bag is formed in a cylindrical shape by a heat seal portion in the vertical direction, and among the side portions on both sides of the body portion, At least one side portion is formed by the folded portion of the laminated film, and of the upper and lower opening ends, one opening end is sealed by the heat seal portion, and inside the heat seal portion of the opening end, With a chuck tape, which can be opened and closed in a lateral direction from one side to the other side, or in an oblique direction toward the heat seal part at the open end. A bag has been proposed.
Here, the chuck tape 50 includes a male side member and a female side member, and is attached by welding to a flexible packaging material (see, for example, Patent Document 1).

Further, as another example of a bag with a zipper, which is made of a soft packaging material and has a plastic zipper attached to the opening, at least the end of the zipper located at the side part of the zipper opening formed by attaching the zipper There has been proposed a zippered bag characterized in that a fitting portion is crushed and a soft packaging material and a zipper on the side portion are welded. (For example, refer to Patent Document 2).
JP 2003-212248 A JP 2003-128090 A

  However, since the zipper tape is attached to the bag with the zipper tape laterally from one side to the other side and the zipper tape itself has rigidity, the bag mouth is naturally Closed and it was difficult to take out the contents from the mouth of the bag. Such a problem is that, when the shape of the bag is, for example, vertically long and narrow, the stability of the bag is poor and it is difficult to take out the contents from the mouth of the bag.

An object of the present invention is useful as a packaging bag for contents in which the filled contents are taken out little by little, has a wide take-out port, and has a wide bottom surface area. Because of its stability, it is easy to take out the contents, it can be packed compactly for the capacity, it has excellent filling ability and sealability of the contents, and it has a zipper tape that is excellent in bag productivity, openability and resealability It is providing the manufacturing method of a package.

  Therefore, in order to solve the above problems, the package with a chuck tape of the present invention is formed of a laminated film in which a sealant layer is laminated on the innermost layer, and is a substantially tetrahedral-shaped package having four substantially triangular surfaces. Then, an openable and closable chuck tape is thermally bonded to the inner surface in the vicinity of the opening end serving as the mouth portion of the bag body, and both side ends are heat-sealed in directions orthogonal to each other.

  In the present invention, as shown in FIG. 4, the chuck tape is composed of a tape body 12 provided with ridges that can be fitted to each other and a tape body 13 provided with ridges, and an opening portion of the bag. On the inner surface of the bag, both are arranged so that the ridges and recesses face each other, and the tape body is attached to the bag by heat bonding, and the bag is opened and closed by fitting or disengaging the ridges and recesses. Can be easily and repeatedly performed.

  Further, when attaching such a chuck tape to a bag, in the present invention, the tape body 12 provided with the ridges and the tape body 13 provided with the ridges are fitted in advance, It is inserted laterally from one side of the bag body and thermally bonded to a predetermined position. To that end, the surfaces of the chuck tape with the ridges or ridges are not fused together. In addition, each tape body of the chuck tape is formed of two or more layers, and the fusing temperature of the resin on the side where the ridges or dents are provided is such that the heat of the heat-adhesive resin layer 16 on the side in contact with the bag. It is preferably formed so as to be higher by about 5 ° C. to 25 ° C. than the bonding temperature.

By adopting the configuration as described above, the bag is a substantially tetrahedral-shaped package having four substantially triangular surfaces, so that the bag after filling the contents has self-supporting property and is compact for the capacity. It can be packaged and has an excellent appearance.
Furthermore, a zipper tape that can be freely opened and closed is attached to the inner surface in the vicinity of the opening end that becomes the mouth of the bag body, so that the contents are taken out. When the chuck tape is disengaged, the mouth portion can be opened larger than the case where the chuck tape is attached to a conventional gusset bag or a three-side seal bag form, and the mouth portion and the bag body. The balance of the parts is good and the contents can be taken out easily. And even after taking out a part of the contents, the zipper tape can be easily fitted and the bag can be resealed, so that the contents can be stored safely.

  In addition, such a package with a zipper tape is manufactured by using a conventional bag making machine so that the sealant layer of the long and wide laminated film is folded inside and folded inside like a crease. After forming the part, and overlapping the sealant layers at the ends of the folded laminated films on both sides at the top, forming the bag body formed in a cylindrical shape, in the section before performing side heat sealing, Install the chuck tape attachment device, insert the chuck tape from the direction parallel to the bag folding direction with the guide and heat-bond it with the guide, and attach the chuck tape in-line with the bag making to manufacture the bag with the chuck tape can do. Moreover, since it is not necessary to thermally bond the tape body provided with the ridges of the chuck tape and the tape body provided with the ridges separately, the production process can be greatly simplified and the production can be performed with high productivity.

  Further, when attaching such a chuck tape to the bag, in the present invention, the tape body provided with the male fitting portion and the tape body provided with the female fitting portion are pre-fitted. In a state, the chuck tape cut to a length corresponding to the width of the bag is temporarily bonded to a predetermined position by thermal bonding, and then heat-sealing the overlapping portion on one side of the bag body, The other side overlapped part is heat-sealed from the top to the inside of the attachment position of the chuck tape, leaving a non-seal part that becomes the content filling port, and then the bag body is formed. The tape body part of the tape is heated and pressurized to thermally bond it to the inner surface of the bag. For this purpose, the surfaces on the side of the chuck tape where the male fitting part or female fitting part is provided are heated. At least the chuck tape The heat bonding part of each tape body is formed of two or more layers, and the surface layer on the side where the male or female fitting part of each tape body is provided is not thermally fused to each other. It is more preferable to form the resin with a resin having a thermal bonding temperature higher by about 5 ° C. to 25 ° C. than the other surface layer.

  Further, the package with a chuck tape of the present invention is such that an outer edge formed by heat-bonding the chuck tape is sealed by a heat seal portion, and a bag is provided between the heat seal portion and the chuck tape. An unsealing means is provided.

  As the above-mentioned easy-opening means, for example, in addition to a method of providing a notch that is widely used even in a normal laminated film bag, a method of providing a half-cut line by laser light irradiation or the like, or an intermediate layer of a laminated film of a bag (In this case, the uniaxially stretched film is used so that its stretching direction matches the opening direction of the bag), etc., and these may be used alone, A combination of a notch and a half-cut line, or a laminate of uniaxially stretched films can also be used.

The notches such as I-shape and V-shape are usually used as the notches, but the shape is not particularly limited, and any shape having an acute angle portion in the cutting direction can be used. Moreover, when providing a half cut line, not only a straight half cut line but an intermittent half cut line such as a perforation can be provided. Furthermore, the number of such half-cut lines may be one, but assuming that the tearing direction is deviated, a plurality of half-cut lines such as one or two on each side of the center half-cut line. Can be provided in a shape that converges to a parallel or central half-cut line.
The bag opening means may be an opening instruction line such as a tear line displayed by printing or an opening instruction mark, and may be an easy opening means such as the following that facilitates the actual opening operation by tearing. There may be. Further, a plurality of these may be provided in appropriate combination.

  By adopting such a configuration, in addition to the effect of the invention described in claim 1 above, an opening that becomes the mouth of a gusset-type bag by heat-sealing the outer edge of the chuck tape. A zipper tape that can be freely opened and closed on the inner surface in the vicinity of the end is thermally bonded at the tape body, and a perforated intermittent cut line is provided on the outside as a bag opening means. Since the portion is heat-sealed, even if a perforated intermittent cut line is provided as a means for opening the bag, the weak sealing portion ensures the sealing performance of the bag, and the bag is opened. When the bag is a gusset-type bag due to the perforated intermittent cut lines, and the film folds of the gusset part are interposed in the cutting line, the bag can be easily torn and the outer edge of the bag mouth Marginal Toshiru portion can be removed, the outer zipper tape can be opened reliably. Thereafter, by dissociating the fitting of the chuck tape, the mouth of the bag can be greatly opened, and the contents can be easily taken out. And even after taking out a part of the contents, the zipper tape can be easily fitted and the bag can be resealed, so that the contents can be stored safely.

In addition, the manufacturing method of the packaging body with a chuck tape of the present invention is a substantially tetrahedral-shaped packaging body having four substantially triangular surfaces, and can be freely opened and closed on the inner surface near the opening end that becomes the mouth portion of the bag body. A method for producing a package with a chuck tape, in which a zipper tape is heat-bonded and heat-sealed in opposite directions at both sides, and includes at least the following steps (1) to (8): Features. That is,
(1) While feeding a long laminated film with a sealant layer laminated to the innermost layer in the longitudinal direction, it is folded so that the sealant layer is on the inside, forming a fold-like folded portion on the inside, and folded back The process of forming the bag body formed in a cylindrical shape by overlapping the sealant layers at the ends of the laminated films on both sides at the top.
(2) A step of inserting a chuck tape in the lateral direction of the bag by a guide on the same side of the folded portion from between the overlapping portions of the laminated film on the side portion of the bag body formed in the cylindrical shape.
(3) A step of heating and pressurizing the inserted chuck tape from the outside of the bag body and thermally bonding it to the inner surface of the bag.
(4) A step of heat-sealing the outer top portion of the chuck tape thermally bonded to the bag body.
(5) Heat seal the overlapping part on one side of the bag body and leave the non-sealing part on the other side part as a filling port for the contents of the chuck tape from the top. The process of heat sealing to the inside.
(6) A step of cutting the bag into individual lengths.
(7) A step of folding back the folded portion toward the inside of the bag body.
(8) A step of filling a certain content from the content filling port of the bag and sealing the content filling port by heat sealing. It consists of the manufacturing method containing.

  In the above manufacturing method, the chuck tapes inserted in the lateral direction from between the laminated portions of the laminated films on the side portions of the bag main body portion in the step (2) are, as described above, protrusions that can be fitted to each other. Are used in a state in which a chuck tape constituted by a tape body provided with a tape body provided with a groove is previously fitted, and each tape body is a multilayer of two or more layers. Formed.

  By adopting such a manufacturing method, the chuck tape can be attached in-line with the bag making, and at the same time, the tape body provided with the ridges of the chuck tape and the tape body provided with the ridges are heated separately. Rather than bonding, heat bonding can be performed in a state in which both are fitted, so that there is no poor fitting due to misalignment between the two, quality is improved, the heat bonding apparatus can be simplified, and the manufacturing process is also significant. Simplification is possible. Therefore, the packaging body with a zipper tape according to the present invention can be manufactured with high quality and high productivity.

  The package with a zipper tape of the present invention has a wide outlet, has a good balance between the mouth and the bag body, can easily take out the contents, and the bag after filling the contents is self-supporting, It can be packaged compactly for its capacity, is easy to handle, has excellent appearance, is highly productive, is suitable for filling contents, has excellent sealing properties in the distribution process, and can be easily torn to the outer edge of the bag mouth The heat seal part at the edge can be removed, and even after taking out a part of the contents by the opening means, the zipper tape can be easily fitted and the bag can be resealed, so the contents can be stored safely Can do.

Below, the material used for the packaging body 200 with a chuck tape of the present invention, that is, the laminated film 1 of the bag and the chuck tape 50 will be described.
First, the laminated film 1 used for the packaging body with a chuck tape of the present invention is mainly a laminated film mainly made of plastic, but is not particularly limited, and adopts various configurations depending on the contents to be filled. be able to. In a simple configuration, a sealant layer can be laminated on the base film layer, but depending on the required performance, water vapor can be used as an intermediate layer between the base film layer and the sealant layer. Other gas barrier layers, light shielding layers, strength improving layers, and the like may be laminated. In addition, each of the base film layer, the intermediate layer, and the sealant layer may be formed as a single layer, or may be formed by laminating a plurality of layers.

  In addition to the biaxially stretched polypropylene film, the base film layer includes a biaxially stretched polyester film such as a biaxially stretched polyethylene terephthalate film and a biaxially stretched polyethylene naphthalate film, nylon 6, nylon 66, MXD6 (polymetaxylylene). A biaxially stretched polyamide film such as adipamide can be suitably used, but various engineering plastic films can also be used as necessary. These may be used singly or may be used by combining a plurality.

  When the intermediate layer is a gas barrier layer, the intermediate layer may be a film of ethylene / vinyl acetate copolymer saponified product (EVOH), polyvinylidene chloride (PVDC), polyacrylonitrile (PAN), aluminum foil, or , Biaxially stretched nylon film (ON film), biaxially stretched polyethylene terephthalate film (PET film), biaxially stretched polypropylene film (OPP film), etc. provided with vapor deposition layers such as silica, alumina, aluminum, and PVDC coating layers Can be used. Among these, since the film provided with the aluminum foil or the aluminum vapor deposition layer is opaque, it can also serve as a light shielding layer. Moreover, when making an intermediate | middle layer into a strength improvement layer, the said base film may be additionally laminated | stacked suitably, and a biaxial stretching high density polyethylene film etc. can also be laminated | stacked also as a moisture-proof layer. A known dry lamination method or extrusion lamination method (sandwich lamination method) can be used for laminating the base film layer and the intermediate layer.

  The innermost sealant layer includes low-density polyethylene (LDPE) and linear low-density polyethylene (L / LDPE), as well as ethylene / α-olefin copolymers, ethylene / vinyl acetate copolymers, and ethylene / acrylic acid copolymers. A polymer, an ethylene / acrylic acid ester copolymer, polypropylene or a copolymer thereof can be used. For the lamination of the sealant layer, the above resin may be formed into a film and laminated by a dry lamination method or an extrusion lamination method, or the above resin may be laminated by extrusion coating.

  Next, the chuck tape 50 used in the present invention will be described with reference to FIG. FIG. 4 is a schematic enlarged cross-sectional view for explaining the structure of the chuck tape used in the present invention. The chuck tape 50 shown in FIG. 4 is a laminated film 1 on both sides in the vicinity of one opening end serving as a mouth portion of a bag body. It is shown in a state when it is heat-bonded to the inner surface and the fitting is dissociated. That is, the chuck tape 50 is provided on the inner surface of the other laminated film 1 so as to be opposed to the tape body 12 with the protruding strips having the male fitting portion 14 thermally bonded to the inner surface of one laminated film 1. It is comprised with the tape body 13 with a groove | channel which has the female type fitting part 15 heat-bonded, Furthermore, as demonstrated above, the tape body 12 with a ridge line and the tape body 13 with a groove | channel are each, It is formed of two or more layers (two layers in the figure) of resin, and in the tape body 12 with ridges, the male fitting portion 14 side and the heat adhesive resin layer 16 side thermally bonded to the laminated film 1 However, in the tape body 13 with the concave stripes, the resin having different heat-fusing temperature or heat-bonding temperature between the female fitting portion 15 side and the heat-adhesive resin layer 16 side heat-bonded to the laminated film 1. It is formed with. However, at least the thermoadhesive resin layer 16 of the tape body 12 with ridges and the thermoadhesive resin layer 16 of the tape body 13 with ridges may be the same resin.

  This is because when the chuck tape 50 is thermally bonded to the inner surface of the bag body, in the present invention, the tape body 12 with the ridges and the tape body 13 with the ridges are thermally bonded. When the part side and the heat-adhesive resin layer 16 side are the same resin, the abutted tape parts on the fitting part side are likely to be heat-sealed, and dissociation of the fitting part becomes impossible if heat-sealed. It is. Therefore, the resin on the male fitting portion 14 side and the female fitting portion 15 side is not thermally fused to each other, or when the fusion is performed, the fusion temperature is the thermal adhesion of the thermal adhesive resin layer 16. It is preferably about 5 to 25 ° C. higher than the temperature.

  The selection of the resin on the male fitting portion 14 or female fitting portion 15 side of the chuck tape 50 and the heat-adhesive resin layer 16 side also considers the relationship with the resin of the sealant layer of the laminated film 1 of the bag. For example, polypropylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, poly-4-methyl may be used as the resin on the male fitting portion 14 or female fitting portion 15 side. When a pentene-1 copolymer or the like is used, the resin on the heat-adhesive resin layer 16 side is a resin having a reduced density or molecular weight, or a copolymer thereof, or a copolymer containing a comonomer. A resin having a large amount, and a resin having a different melting point as well as the material can be appropriately selected and used so as to give the temperature difference.

Hereinafter, the present invention will be described more specifically with reference to the drawings. However, the present invention is not limited to these drawings. FIG. 1 is a perspective view showing a configuration of an embodiment of a packaging body 200 with a chuck tape of the present invention, and FIG. 2 is a perspective view before end sealing of a bag body 100 with a chuck tape of the present invention, FIG. 3 is a plan view after sealing, leaving the filling port of the bag body 100 with the chuck tape of the present invention.
As shown in FIG. 2, the bag body 100 with the chuck tape of the present invention is folded with the sealant layer of the laminated film 1 inside to form a folded-back portion on the inside, and the laminated films on both sides folded. The sealant layers at the ends of the tape are overlapped at the top to form a cylindrical folded bag body, and from the overlapped side, a tape with a ridge and a female mold having a male fitting portion The chuck tape 50 in a state in which the concave tape body having the fitting portion was previously fitted was inserted into the inner surface in the vicinity of the opening end serving as the mouth portion so as to be on the same side of the folded portion 2.
As shown in FIG. 3, the bag body 100 with the chuck tape of the present invention is heated and pressurized from the outside of the bag and thermally bonded to the inner surface near the opening end that becomes the mouth portion of the bag body, Heat seal the overlapping part of one side part 4a, 4c, and heat seal the overlapping part of the other side part 4b from the top part to the inside of the attachment position of the chuck tape, leaving a non-seal part 7 serving as a content filling port Further, the upper end edge portion of the outer side of the portion of the bag body 100 to which the chuck tape 50 is thermally bonded is heat sealed with the top seal portion 6.
Further, between the top seal portion 6 of the bag 100 and the chuck tape 50, as a means for opening the bag body 100, in this case, a cut line 8 by printing and notches 9a, 9b are provided at both ends thereof. Yes. The notches 9a and 9b may be provided with notches 9a only at one end of the cut line 8, for example, at the end on the side seal portion 4a side.
The non-seal portion 7 on one side of the bag body 100 with the chuck tape is used to fill the contents, so that the folded portion inside the bag body is folded outward.
By adopting such a configuration, the opening can be widened and filled, so that the content can be easily filled from the non-seal portion 7 on the side.
In addition, after filling the contents from the filling port of the contents, the four substantially triangular planes shown in FIG. 1 are sealed by heat sealing at the end 4d of the filling port folded outward. It becomes the substantially tetrahedral-shaped packaging body 200 which has.

By adopting such a configuration, the side seal portion 4d can be heat-sealed and completely sealed after filling. The bag body 100 filled with the contents has a substantially tetrahedral shape having four substantially triangular surfaces, and the bottom portion also has a flat and substantially triangular shape, so that it has self-supporting properties, and handling and appearance are improved. Moreover, it can be packaged compactly for its capacity.
And when taking out the filled contents, as the means for opening the bag between the top seal portion 6 and the chuck tape 50, the tear line 8 and notches 9a, 9b are provided at both ends thereof, The top seal portion 6 can be cut by easily tearing the bag along the cut line 8 using one notch.
Since the chuck tape 50 can be opened and closed after the top seal portion is cut off, the chuck tape can be easily removed by grasping the upper end of the laminated film on both sides or the tape body portion outside the chuck tape 50 and pulling them outward. Is disengaged, and the upper portion of the package 200 can be greatly opened. Therefore, the contents can be easily taken out, and after a part of the contents is taken out, it can be easily resealed with the chuck tape 50, and the contents can be stored safely. Furthermore, even after all the contents are used, the bag 100 with the chuck tape can be refilled with any contents and reused as a sealed bag for storage.

It is a perspective view which shows the structure of one Example of the packaging body with a chuck tape of this invention. It is a perspective view before the edge part seal | sticker of the bag body with a chuck tape of this invention. It is a top view after sealing leaving the filling port of the bag body with a zipper tape of this invention. It is a model expanded sectional view explaining the structure of a chuck tape.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Laminated | multilayer film 2 Folding-shaped folding | returning part 4a, 4b, 4c, 4d Side seal part 6 Top seal part 7 Non-seal part 8 Cut line 9a, 9b Notch 10 Bottom part 12 Tape body with convex strip 13 Tape body with concave strip 14 Male fitting part 15 Female fitting part 16 Thermal adhesive resin layer 50 Chuck tape 100 Bag body with chuck tape 200 Packaging body with chuck tape

Claims (1)

A substantially tetrahedral-shaped package having four substantially triangular surfaces, and an openable and closable chuck tape is thermally bonded to the inner surface near the opening end that becomes the mouth of the bag body, and both side ends are orthogonal to each other. A method for manufacturing a package with a zipper tape that is heat-sealed in a direction to perform, comprising at least the following steps (1) to (8).
(1) While sending a long laminated film in which the sealant layer is laminated on the innermost layer in the longitudinal direction,
Folded so that the sealant layer is on the inside, a folded-back part was formed inside, and the sealant layers at the ends of the folded film on both sides were overlapped at the top to form a cylinder Forming the bag body.
(2) A step of inserting a chuck tape in the lateral direction of the bag by a guide on the same side of the folded portion from between the overlapping portions of the laminated film on the side portion of the bag body formed in the cylindrical shape.
(3) A step of heating and pressurizing the inserted chuck tape from the outside of the bag body and thermally bonding it to the inner surface of the bag.
(4) A step of heat-sealing the outer top portion of the chuck tape thermally bonded to the bag body.
(5) Heat seal the overlapping part on one side of the bag body and leave the non-sealing part on the other side part as a filling port for the contents of the chuck tape from the top. The process of heat sealing to the inside.
(6) A step of cutting the bag into individual lengths.
(7) A step of folding back the folded portion toward the inside of the bag body.
(8) A step of filling a certain content from the content filling port of the bag and sealing the content filling port with a heat seal.

Images