JP7176220B2 - Pouch manufacturing method and manufacturing apparatus - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method and apparatus for manufacturing a pouch capable of containing liquid inside. In particular, the present invention relates to a pouch for liquid having a branch projecting from the front body, and to a pouch manufacturing method and a manufacturing apparatus for partially punching out only the spout portion of the branch in order to form the spout.

Conventionally, a pouch made of a laminate having a sealant layer with a plastic film as a base material is not only composed of a single layer of plastic film other than the sealant layer, but also other films, resin layers, metal foils, etc. As a laminate, one of the characteristics is that it is possible to design a layer structure and materials according to the required quality depending on the contents, and it is widely used for various purposes.

In particular, pouches having spouts are excellent for storing fluid contents and pouring them out as needed. For example, it is widely used for beverages and foods, and is suitably used for paste-type foods as well as liquids. It is also used for seasonings such as miso, and has many advantages over glass bottles and cans in terms of performance and cost.

In addition to food, for example, liquid detergents, softeners and other toiletries, and industrial products such as engine oil, liquid and paste contents can be easily filled, stored, and poured out of pouches. In addition, it is possible to realize a product excellent in storage stability depending on the application.

In addition, recently, from the viewpoint of environmental protection, there is a movement to reduce waste by using refillable containers instead of disposable plastic and glass bottles. There is a particularly high demand for pouches made of laminates having

In general, pouches have the function of displaying the information of the contents on the surface visible from the outside, storing the contents inside the pouch, protecting the contents from the external environment and physical external forces, and preserving them. When taking out the contents, the ease of taking out, especially if it is a liquid, is important, and the form and material composition vary depending on the contents, their uses, and purposes. .

In particular, regarding the ease of pouring out the contents, when taking out the contents from the opening after opening the pouch, it is not only stable and easy to pour out, but also spills outside and stains hands and clothes. It is desirable that the opening stably maintain its shape. This is also a particular requirement, for example in refillable containers.

Alternatively, it has been pointed out that due to the rigidity and resilience of the plastic film, the passages and openings tend to close due to the reduction of the contents, and there are cases where stable and easy pouring cannot be obtained.

If a stable shape cannot be maintained, the pouring operation itself is unstable, and there is a risk of causing problems such as the contents spilling out. Alternatively, if the opening closes while the contents are being poured out, the opening must be opened again, and the work with fingers is more difficult than opening a new one, and the contents will be removed. Users and consumers have been troubled by not only the risk of spilling, but also the risk of staining fingers and clothes.

Ease of pouring is a common issue that needs to be improved regardless of whether the content is liquid or pasty. Conventionally, for example, pouches have been provided with spouts to improve ease of removal.

However, mounting the spigot presents problems such as high material costs and an increase in the number of manufacturing processes, because the spigot is generally made up of a separate member.

In addition, when a pouch is used as a container for refilling, which has been put into practical use for detergents, shampoos, etc., the purpose of refilling is to save resources and reduce waste. As a retrograde move, it is not welcome.

However, in many cases, a pouch having a plastic film as a base material and a sealant layer has three or four peripheral edges of the pouch and both side edges of the opening sealed with a sealant layer, and the plastic film has Due to its elasticity and flexibility, it may not be possible to maintain a stable shape, which may interfere with stable and easy pouring.

In general, a pouch is manufactured by placing the sealant layers of the laminates constituting the pouch facing each other and sealing the periphery of the pouch. However, it was not sufficient in the pursuit of stability and ease of pouring as described above.

On the other hand, paying attention to this point, in order to maintain the shape of the spout and opening when pouring out the liquid content, the pouch body is provided with a branch and the upper part of the body is folded back to achieve the purpose. Shapes to be achieved have been devised.

This pouch is composed of a body, a bottom, and a branch. The body is composed of a front side body and a back side body, and the side ends and the top end are heat-sealed. be.

Also at the bottom of the barrel, a bottom plate is heat-sealed between the front and back barrels to form an expandable sealed bottom, and the front barrel extends from the front barrel to the tip. A branch is formed that has and protrudes.

This branch is a folding line at the height position of the branch, and the laminated body continuing from the upper side of the front side body overlaps with the laminated body continuing from the lower side of the front side body so that it can be folded back to either the upper side or the lower side of the front side body part. , with heat-sealed side ends and a tip.

Also, the tip of the branch is provided so as to be removable from the branch so that the pouch can be opened to form the spout. That is, it is a pouch having a spout and an opening at the branched portion.

However, in the pouch of this shape, although the stability and ease of pouring can be obtained by improving the shape retention of the pouch at the time of pouring out due to the splitting, the split portion is sealed with the laminated body facing each other. It overlaps doubly and constitutes a branch.

Therefore, for example, if a cutting line for cutting off the branch while leaving the pouring port is to be punched, the branch and the body will be punched through together, resulting in a branched portion. Punching chisels is a very difficult task, and there were difficulties in the manufacturing method.

Patent Document 1 proposes a sealed bag having a folded portion and a manufacturing method thereof. The pouch is a pouch having a folded portion formed with a heat-sealed portion in a state in which the inside of the pouch is sealed, and has a folded portion (branching chamber) formed by pushing a part of the side surface of a cylindrical sheet. agree on the points.

However, in this folded portion (branch chamber), there is no description and no consideration is given to the processing of the cutting line for forming the spout portion and the formation of the spout.

Further, in Patent Document 2, a Thomson blade is moved in the direction in which a sheet to be cut is conveyed by a conveying belt, and is lowered so as to approach the cutting surface of a Thomson blade cradle so that it is conveyed to the cutting surface. There is a proposal for a cutting device that cuts a sheet to be cut with a Thomson blade.

However, even if it is possible to perform punching on the premise of a certain level of productivity, it is difficult to punch out a cutting line for the taper shape of the spout and only for the branched portion. was the situation.

JP-A-11-130091 Japanese Patent Application Laid-Open No. 2007-283440

The present invention has been made in view of such circumstances, and consists of a laminate having at least a sealant layer with a plastic film as a base material capable of accommodating liquid contents, and having a branch on the front side trunk portion. To provide a pouch manufacturing method and a manufacturing apparatus capable of forming a cutting line for forming a spout at a branched portion of a pouch which is easy to pour out and stably by partially punching only the branched portion. is the subject.

As a means for solving the above problems, the invention according to claim 1,
A method for manufacturing a pouch comprising a laminate comprising a plastic film as a base material and at least a sealant layer, comprising:
The pouch consists of a front side body, branches protruding from the front side body, and a back side body,
The front side trunk and the back side trunk are supplied to a pouch manufacturing apparatus with the sealant layers facing each other, and the peripheral edge of the portion to be the pouch is sealed to make a bag,
The branch is a folding line at the height position of the branch, and the laminated body continuing from the upper side of the front side body and the laminated body continuing from the lower side of the front side body are overlapped so that they can be folded back to either the upper side or the lower side of the front side body. , a spout is formed by sealing the side end portion and the tip portion, and a branch protruding from the front body portion with the spout,
The branch is provided with a cutting line by punching so that it can be cut with fingers while leaving the spout on the front body side,
The cutting line has a cut portion through which the punch penetrates and a non-cut portion in which the punch does not penetrate,
An unsealing line is provided at the part of the spout that will be inside the pouch,
The punching is performed by using a punching blade fixedly installed on the cutting die and a cradle for receiving the punching blade to punch out the cutting line of the branch only for the branch,
In the punching, when the branched portion of the pouch being conveyed reaches between the punching blade and the cradle, the conveyance of the pouch is stopped, and a receiving plate is inserted between the branched portion and the front side body portion to form the pouch. A cutting line is formed in the branch by pressing only the branch between the punching blade and the receiving plate with the cradle as a support,
Furthermore, in the method for manufacturing pouches, in which individual pouches are cut using a cutter to form single-leaf pouches,
The method of manufacturing a pouch is characterized in that the backing plate has a thickness of 0.8 mm to 1.5 mm and is made of polyethylene terephthalate resin, polyurethane resin, or rubber.

In addition, the invention according to claim 2,
2. The method of manufacturing a pouch according to claim 1, wherein the cutting line of the branch is punched by a Thomson blade having a punching blade fixed to a cutting die.

In addition, the invention according to claim 3 ,
3. A pouch according to claim 1 or 2 , characterized in that in the lower part of the body of the pouch a bottom tape is sealed between the front body and the back body to form an expandably sealed bottom. is a method of manufacturing a pouch.

Further, the invention according to claim 4 ,
4. The method of manufacturing a pouch according to any one of claims 1 to 3 , wherein the planned opening line is provided with an easy-to-open mechanism.

In addition, the invention according to claim 5 ,
5. The method for manufacturing a pouch according to any one of claims 1 to 4 , wherein the cutting line of the branched portion is connected to a planned opening line.

In addition, the invention according to claim 6 ,
An apparatus for manufacturing a pouch comprising a plastic film as a base material and a laminate including at least a sealant layer, comprising a front side body portion, branches projecting from the front side body portion, and a back side body portion,
The front side body, the back side body, and the branches are provided with a mechanism for supplying a long laminate with the sealant layers facing each other and sealing the peripheral edge of the portion to be a pouch to make a bag,
The branch is a folding line at the height position of the branch, and the laminated body continuing from the upper side of the front side body and the laminated body continuing from the lower side of the front side body are overlapped so that they can be folded back to either the upper side or the lower side of the front side body. , the side end and the tip are sealed to form a spout, and from the front body part, a branch protruding with a spout with a planned opening line,
A cutting line consisting of a cut portion and a non-cut portion is formed by using a punching blade fixedly installed in the cutting die and a cradle for receiving the punching blade to cut the branch, leaving the spout, with fingers. Equipped with a mechanism to punch out
In the punching, when the branched portion of the pouch being conveyed reaches between the punching blade and the cradle, the conveyance of the pouch is stopped, and a receiving plate is inserted between the branched portion and the front side body portion to form the pouch. Equipped with a mechanism that forms a cutting line only at the branch by pressing the branch between the punching blade and the receiving plate with the support as a support,
Furthermore, in a pouch manufacturing apparatus equipped with a mechanism for separating individual pouches using a cutter to make single-leaf pouches,
The pouch manufacturing apparatus is characterized in that the backing plate has a thickness of 0.8 mm to 1.5 mm and is made of polyethylene terephthalate resin, polyurethane resin, or rubber .

According to the present invention, a liquid content-capable plastic film is used as a base material, and the laminated body has at least a sealant layer. It is possible to provide a pouch manufacturing method and manufacturing apparatus capable of forming a cutting line for forming a spout at a branched portion of a typical pouch by partially punching only the branched portion.

In particular, according to the second aspect of the invention, when forming the cutting line for forming the spout in the branched portion by partially punching out only the branched portion, a Thomson blade is used to achieve higher accuracy and Punching with excellent productivity is possible.

In particular, according to the third aspect of the invention, when forming the cutting line for forming the spout in the branched portion by partially punching out only the branched portion, the receiving plate is inserted between the branched portion and the front body portion. By using , branch-only punching can be ensured.

In addition, by setting the thickness and material of the backing plate within the range described in claim 3, it is possible to perform punching with higher precision and higher productivity.

In addition, according to the fourth aspect of the present invention, it is possible to give the pouch self-supporting property and to efficiently increase the capacity of the pouch after it is filled with the liquid content.

In addition, according to the fifth aspect of the invention, the planned unsealing line is equipped with an easy-sealing mechanism, which makes it easier to open the pouch by fingers after cutting off the branch leaving the spout. can be

In addition, according to the sixth aspect of the invention, in particular, the cutting line of the branch is connected to the planned unsealing line, so that the branch is cut while leaving the spout and the spout is provided inside the spout. The opening along the opening line can be continuously performed, and the opening of the pouch can be made easier.

In addition, according to the seventh aspect of the invention, a laminate comprising a plastic film as a base material and at least a sealant layer, and having a branch on the front side body portion, is easy to pour out and is stable. It is possible to supply a pouch manufacturing apparatus capable of forming a cutting line for forming a spout at a branched portion of a pouch by partially punching only the branched portion.

FIG. 1 is a schematic perspective view for explaining one embodiment of a pouch manufactured by the method and apparatus for manufacturing a pouch according to the present invention. FIG. 2 is a schematic diagram for explaining one embodiment of the pouch manufacturing method and manufacturing apparatus according to the present invention. FIG. 3 is a schematic diagram especially for explaining the punching section of one embodiment of the pouch manufacturing method and manufacturing apparatus according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to FIGS. 1 to 3. FIG. However, the invention is not limited to the examples shown here. The invention is limited by the claims.

FIG. 1 is a schematic perspective view for explaining one embodiment of a pouch manufactured by the manufacturing method and manufacturing apparatus according to the present invention.

The pouch (100) manufactured by the manufacturing method and the manufacturing apparatus according to the present invention is composed of a trunk (1) and branches (40). ), and a back body (10), formed by sealing side edges (6), top edges (7) and bottom edges (12).

In the example shown in FIG. 1, in the pouch lower part (2), the bottom tape (50) which is mountain-folded along the folding line (9) is placed between the front body (20) and the back body (10). When filled with contents, the bottom tape (50) expands to form a surface on the bottom, allowing the pouch (100) to stand on its own. .

In addition, since the bottom tape (50) is expandable, it is possible to reasonably increase the inner volume of the pouch (100).

The branch (40) is a folding line (22) at the height position (A) of the branch, so that it can be folded back either up or down the front body (20), and the laminate continues from the upper side (30) of the front body (20). , and a continuous laminate from the bottom of the front body (20), and the side ends and the tip are sealed to form a spout (13). That is, a branch (40) projecting from the front trunk (20) with a spout (13) is formed.

In addition, the branch (40) is provided with a cutting line (8) that can be cut, for example, with fingers, leaving the spout (13), which is formed by punching only for the branch (40). ing. This cutting line (8) is provided so that it can be cut using fingers, but it can also be cut using a tool such as a knife or scissors.

However, the cutting line (8) has a part that is not punched out, that is, a non-cutting part (19). That is, the cutting line (8) consists of a cut portion (18) and a non-cut portion (19). In the example shown in FIG. 1, branch (40) is in a state prior to cutting along cutting line (8).

As a pouch (100), the pre-cut state is maintained so that when the pouch (100) is opened, the spout (13) reveals its outer shape by cutting the branch (40) along the cutting line (8). In addition, it is effective to avoid accidental opening, etc., because it is necessary to cut along the planned opening line (11) provided at the tip of the spout (13) to create an opening (14). is.

The unpunched portion of the cutting line (8), i.e., the uncut portion (19), is positioned so that it is not easily cut off and can be cut off by fingers before opening. , location and shape are arbitrary. For example, it may be in the shape of a dashed line, and may be provided at about two locations on the left and right of the spout (13).

In addition, an unsealing line (11) is provided on the portion of the spout (13) inside the pouch. When the expected opening line (11) is opened in the case of pouring out the contents, etc., that portion becomes the opening (14).

That is, the opening (14) can be formed by tearing the expected opening line (11) with fingers, a knife, scissors, or the like. In particular, when tearing with fingers, the opening operation can be performed more easily and accurately by providing an easy-opening mechanism along the intended opening line (11).

Furthermore, although different from the example shown in FIG. 1, when the cutting line (8) and the expected opening line (11) provided with the easy opening mechanism are connected, the spout (13) of the branch (40) It is possible to continuously cut off the portion other than the portion and to open the pouch (100) along the planned opening line (11) at the same time, making it easier to open the pouch (100).

In actual opening, first, the upper portion (30) of the front body portion is pulled down in the direction of the arrow (16), that is, backward of the pouch (100). Subsequently, the branch (40) is pulled up in the direction of the arrow (17) to position the branch (40) above the pouch (100), and then the cutting line (8) is cut off, for example, with a finger, and further the planned opening line ( 11) is cut to form and expose an opening (14), thereby allowing the liquid content to be poured out.

As described above, if the planned opening line (11) is equipped with an easy-opening mechanism, it is possible to easily and accurately open the package with fingers, and if a notch (15) is provided, the Triggered by (15), further easy opening becomes possible.

The easy-to-open mechanism of the planned opening line (11) can be formed by, for example, a half-cut line by a laser beam or a knife, or it is possible to apply the ease of tearing due to the orientation of the plastic film.

In addition, by pressing both ends of the upper side body portion (30) of the pouch (100) pulled backward and pouring out, the spout (13) swells like a funnel, and the liquid flow path of the contents. is ensured, making pouring easy and stable.

FIG. 2 is a schematic diagram for explaining one embodiment of the pouch manufacturing method and manufacturing apparatus according to the present invention.

The pouch manufacturing apparatus (60) according to the present invention comprises a front side trunk portion (20), a branch portion projecting from the front side trunk portion (20), and a laminate comprising a plastic film as a base material and at least a sealant layer. (40), and a pouch (100) manufacturing apparatus consisting of a back body (10).

The pouch manufacturing apparatus (60) according to the present invention stacks the front side body, the back side body, and the long laminate used for branching, and supplies them to the manufacturing apparatus with the sealant layers facing each other, and seals the peripheral edge. Equipped with a mechanism for bag making.

That is, in the unwinding portion (52), the long laminated body (51) is arranged in two stages in the drawing, and each is wound up with the sealant layer facing out. The sealant layers are superimposed so as to face each other and supplied to the manufacturing equipment.

Subsequently, in the example shown in FIG. 2, the long laminated body that has been superimposed and conveyed is attached to the front side body section (20) and the back side body section (20) at the vertical sealing section (53) and the horizontal sealing section (54). 10) is sealed at the periphery to form a bag.

The apparatus (60) for manufacturing pouches according to the present invention comprises a mechanism for forming branches (40). That is, the branch (40) is a folding line (22) at the height position (A) of the branch, and is foldable to either the top or the bottom of the front side trunk, and the laminate that continues from the front side trunk upper side (30) and the front side The trunk (20) is stacked with a continuous laminate from below, the side ends and the tip other than the spout (13) are sealed to form a spout, and a planned opening line is provided from the front side trunk. A mechanism is provided that forms an overhanging branch with an outlet.

In other words, the branches (40) are formed by the vertical seal portion (53) and the horizontal seal portion (54), the laminated body continuing from the upper side of the front body (30) and the laminated body continuing from the lower side of the front side body (20) are overlapped to seal the side end and tip of the branch (40) except for the spout (13).

The pouch manufacturing apparatus (60) according to the present invention also has a mechanism for punching out the branch (40). That is, the cutting line (8) that can be cut off the branch (40) leaving the spout (13) is cut using a cutting die with a punching blade fixedly installed and a cradle for receiving the cutting blade. is provided with a mechanism for forming a cutting line (8). This mechanism will be described later with reference to FIG.

For punching, when the branched portion of the pouch being conveyed reaches between the cutting blade and the cradle, the conveying of the portion that will become the pouch is stopped, the receiving plate is inserted between the branched portion and the front body, A mechanism is provided for forming a cutting line on the branch of the pouch by pressing only the branch of the pouch between the cutting blade and the receiving plate using the support as a support. This mechanism will be described later with reference to FIG.

The punching method using the punching blade (56) in the punching section (55) is not limited, but a generally used punching mechanism such as a Thomson type punching mechanism can be used. This is a mechanism for intermittently punching out pouches supplied between the Thomson blade and the Thomson receiver by vertical movement of the Thomson blade. state.

In the pouch manufacturing apparatus (60) according to the present invention, when forming the cutting line (8) by punching, in addition to the cut part (18), a part that is not punched, that is, a non-cut part (19) is left. Equipped with a punching mechanism.

The pouch manufacturing apparatus (60) according to the present invention further comprises a mechanism for separating individual pouches into single-leaf pouches (58) using, for example, a shear cutter. The sheet pouches (58) cut into sheets by the cutter (57) can be stacked and stored in a stacker (59), for example.

FIG. 3 is a schematic diagram especially for explaining the punching section of one embodiment of the pouch manufacturing method and manufacturing apparatus according to the present invention.

The punch (55), in the example shown in FIG. 3, is an example of a Thomson-type punch mechanism. Also, in the example shown in FIG. 3, the punching part (55) has a cutting die ( 67) is an example.

Therefore, the upper part of the punching part (55) is configured by attaching a Thomson blade (64) as a cutting die (67) to a heater block (62). Also, the lower part of the punched part (55) is a pedestal (63) made of, for example, polyethylene terephthalate resin, polyacetal resin, or the like.

The pouches supplied to the punching section (55) are in a semi-processed state that has already been bag-made through the vertical sealing section (53) and the horizontal sealing section (54). In the example shown in FIG. 3, the branch (40) is folded back, and the branch (40) is folded toward the upper side of the packaging bag. In addition, it is a state in which the front side body part (20) of the body part (1) is directed upward and is conveyed and supplied to the punching part (55).

The Thomson blade (64) has a punching mechanism in which the punching blade (56) is fixedly installed, leaving a portion that is not punched out, that is, a non-cutting portion (19). That is, since the cutting line (8) has a cut portion (18) and a non-cut portion (19) that is partially not punched, the branch (40) leaves the spout (13). It is possible to retain the state before cutting by

The present invention provides a branch (40), leaving a spout (13), a tearable cutting line (8), a punching blade (64) fixedly installed in a cutting die (67), and a punching blade (64). With the cradle (63) to receive the punch, the punching is performed when the branch (40) of the pouch (100) being transported reaches between the cutting die (67) and the cradle (63). 100) is stopped.

At the same time, the receiving plate (61) is inserted between the branch (40) and the front body (20) in the direction of the arrow (65), and the branch (40) of the pouch is separated from the cutting die (67) and the receiving plate (61). By pressing in the direction of the arrow (66) using the cradle (63) as a support, there is provided a mechanism for punching out only the branch (40) to form the cutting line (8).

As a result of intensive studies on the present invention, we found that it is optimal that the backing plate (61) has a thickness of 0.8 mm to 1.5 mm and is made of polyethylene terephthalate resin, polyurethane resin, or rubber. I found something.

That is, by setting the thickness and material of the backing plate (61) within the ranges described above, it is possible to perform punching with higher precision and higher productivity. Since it is not separated into individual pouches, it is conveyed to the next cutter section (57), cut into single-leaf pouches by, for example, a shear cutter, and pouches (100) using the manufacturing method and manufacturing apparatus according to the present invention. is completed.

As described above, according to the present invention, the liquid contents can be stored, and the plastic film is used as the base material. It is also possible to provide a pouch manufacturing method and manufacturing apparatus capable of forming a cutting line for forming a spout in a branched portion of a stable pouch by partially punching only the branched portion.

Further, the present invention comprises a laminate having at least a sealant layer with a plastic film as a base material capable of accommodating liquid contents. That is, it is possible to select the layer constituent materials and design the layer constitution according to the use, contents and required quality of the pouch.

Here, the plastic film used as the base material is a film made of a polymer resin composition, such as polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide (nylon- 6, nylon-66, etc.), polyimide, etc. can be used, and are appropriately selected according to the application.

In particular, when polypropylene or polyethylene terephthalate is used as the base film, it is preferable in terms of film strength and cost. Moreover, when a polyamide film is used in the laminate, it is excellent in puncture resistance, impact resistance, and mechanical strength.

In addition, the sealant layer allows two laminates to be laminated so that the sealant layers face each other and, for example, heat and pressurize to heat-seal them, thereby making it possible to form a pouch. .

Among thermoplastic resins, polyolefin-based resins are generally used as the material for the sealant layer. Specifically, low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), linear low-density polyethylene resin. (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α olefin copolymer, ethylene-methacrylic acid resin copolymer and the like can be used.

Alternatively, blended resins of polyethylene and polybutene, polypropylene resins such as homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, propylene-α-olefin copolymer, etc. can be used. can be done.

The sealant layer can be formed by forming a film of molten resin using an extruder or the like to form a layer on the laminate. Alternatively, it is also possible to form a sealant layer on the surface of the laminate by laminating materials that have been formed into films in advance.

For the purpose of, for example, improving the storage stability of the contents, the laminate may be provided with an opaque layer such as a colored film for shielding ultraviolet rays and the like, if necessary. Alternatively, a gas barrier layer can be provided in a laminate having a plastic film as a base material.

A metal foil or the like can be used as the gas barrier layer. For example, a gas barrier film obtained by vapor-depositing a gas barrier layer made of an inorganic compound in a laminate can be provided as the gas barrier layer. In either case, it is effective in improving the preservability of the contents.

In the case of the gas barrier film, the plastic film to be used is not particularly limited. more preferred.

In the case of a gas barrier film, the gas barrier layer can be composed of, for example, a vapor deposition layer of an inorganic compound and a coating layer.

As a method for forming an inorganic compound deposited layer, an inorganic compound such as SiO or AlO is deposited on a plastic film provided with an anchor coat layer using a vacuum deposition method, and an inorganic compound layer is formed by a vacuum deposition method. be able to.

In addition, as a method for forming a coating layer, an aqueous solution or water containing at least one of a water-soluble polymer and (a) one or more alkoxides or hydrolysates thereof, or both, or (b) tin chloride A coating agent containing a mixed aqueous solution of /alcohol as a main component is applied on the film, dried by heating, and an inorganic compound layer is formed by a coating method to form a coating layer.

At this time, by adding a silane monomer to the coating agent, the adhesion to the anchor coat layer can be improved.

The inorganic compound layer has gas barrier properties even if it is only a film formed by a vacuum deposition method. However, a coating layer, which is an inorganic compound layer formed by a coating method, may be superimposed on a deposition layer, which is an inorganic compound layer formed by a vacuum deposition method, to form a gas barrier layer. can be done.

Therefore, it can achieve higher gas barrier properties, moisture resistance, and water resistance as a gas barrier film, and has flexibility to withstand deformation due to external force, so that it can also be equipped with suitability as a pouch.

Moreover, when SiO is used as the gas barrier layer, the coating is transparent, so that the contents can be seen from the outside of the packaging material.

If necessary, a printed layer is added to the layer visible from the outside of the pouch in the plastic film-based laminate for the purpose of improving the image of the product, displaying the necessary information about the contents, and improving the design. can be provided. The printed layer may be provided on the outermost layer of the pouch.

Moreover, the printed layer may be provided on a portion of the pouch, or may be provided over the entire surface of the pouch. Alternatively, as a method of providing a display portion without using a printed layer, for example, it is possible to attach a printed seal to the surface of the pouch.

Here, the printing method and printing ink are not particularly limited, but among known printing methods, printability on plastic films, design properties such as color tone, adhesion, or as a food container It may be selected as appropriate in consideration of safety and the like.

For example, it can be selected from known printing methods such as gravure printing, offset printing, gravure offset printing, flexographic printing, silk screen printing, and inkjet printing. Among them, the gravure printing method can be preferably used in terms of productivity, suitability for printing on plastic films, and high definition of patterns.

As described above, according to the present invention, the liquid contents can be stored, and the plastic film is used as the base material. It is also possible to provide a pouch manufacturing method and manufacturing apparatus capable of forming a cutting line for forming a spout in a branched portion of a stable pouch by partially punching only the branched portion.

Reference Signs List 1 trunk portion 2 lower pouch portion 6 side end portion 7 upper end portion 8 cutting line 9 folding line 10 rear trunk portion 11 scheduled to be opened Line 12 Lower end 13 Spout 14 Opening 15 Notch 16 Arrow 17 Arrow 18 Cut portion 19 Non-cut portion 20 Front side trunk portion 22... Folding line 30... Front side upper side part 40... Branch 50... Bottom tape 51... Long layered body 52... Unwinding part 53... Vertical Sealing part 54 Horizontal sealing part 55 Punching part 56 Punching blade 57 Cutter part 58 Sheet pouch 59 Stacker 60 Manufacturing device 61 Receiving plate 62 Heater block 63 Cradle 64 Thomson blade 65 Arrow 66 Arrow 67 Cutting die 100 Pouch A Branch height position

Claims (6)

A method for manufacturing a pouch comprising a laminate comprising a plastic film as a base material and at least a sealant layer, comprising:
The pouch consists of a front side body, branches protruding from the front side body, and a back side body,
The front side trunk and the back side trunk are supplied to a pouch manufacturing apparatus with the sealant layers facing each other, and the peripheral edge of the portion to be the pouch is sealed to make a bag,
The branch is a folding line at the height position of the branch, and the laminated body continuing from the upper side of the front side body and the laminated body continuing from the lower side of the front side body are overlapped so that they can be folded back to either the upper side or the lower side of the front side body. , a spout is formed by sealing the side end portion and the tip portion, and a branch protruding from the front body portion with the spout,
The branch is provided with a cutting line by punching so that it can be cut with fingers while leaving the spout on the front body side,
The cutting line has a cut portion through which the punch penetrates and a non-cut portion in which the punch does not penetrate,
An unsealing line is provided at the part of the spout that will be inside the pouch,
The punching is performed by using a punching blade fixedly installed on the cutting die and a cradle for receiving the punching blade to punch out the cutting line of the branch only for the branch,
In the punching, when the branched portion of the pouch being conveyed reaches between the punching blade and the cradle, the conveyance of the pouch is stopped, a receiving plate is inserted between the branched portion and the front body portion, and the pouch is cut. A cutting line is formed in the branch by pressing only the branch between the punching blade and the receiving plate with the cradle as a support,
Furthermore, in the method for manufacturing pouches, in which individual pouches are cut using a cutter to form single-leaf pouches,
A method for manufacturing a pouch, wherein the backing plate has a thickness of 0.8 mm to 1.5 mm and is made of polyethylene terephthalate resin, polyurethane resin, or rubber. 2. The method of manufacturing a pouch according to claim 1, wherein the cutting line of the branch is punched by a Thomson blade having a punching blade fixed to a cutting die. 3. A pouch according to claim 1 or 2, characterized in that in the lower part of the body of the pouch a bottom tape is sealed between the front body and the back body to form an expandably sealed bottom. of the pouch. 4. The method for manufacturing a pouch according to any one of claims 1 to 3, wherein the planned opening line is provided with an easy opening mechanism. The method for manufacturing a pouch according to any one of claims 1 to 4, wherein the cutting line of the branched portion is connected to a planned opening line. An apparatus for manufacturing a pouch comprising a plastic film as a base material and a laminate including at least a sealant layer, comprising a front side body portion, branches projecting from the front side body portion, and a back side body portion,
The front side body, the back side body, and the branches are provided with a mechanism for supplying a long laminate with the sealant layers facing each other and sealing the peripheral edge of the portion to be a pouch to make a bag,
The branch is a folding line at the height position of the branch, and the laminated body continuing from the upper side of the front side body and the laminated body continuing from the lower side of the front side body are overlapped so that they can be folded back to either the upper side or the lower side of the front side body. , the side end and the tip are sealed to form a spout, and from the front body part, a branch protruding with a spout with a planned opening line,
A cutting line consisting of a cut portion and a non-cut portion is formed by using a punching blade fixedly installed in the cutting die and a cradle for receiving the punching blade to cut the branch, leaving the spout, with fingers. Equipped with a mechanism to punch out
In the punching, when the branched portion of the pouch being conveyed reaches between the punching blade and the cradle, the conveyance of the pouch is stopped, and a receiving plate is inserted between the branched portion and the front side body portion to form the pouch. Equipped with a mechanism that forms a cutting line only at the branch by pressing the branch between the punching blade and the receiving plate with the support as a support,
Furthermore, in a pouch manufacturing apparatus equipped with a mechanism for separating individual pouches using a cutter to make single-leaf pouches,
The pouch manufacturing apparatus, wherein the backing plate has a thickness of 0.8 mm to 1.5 mm and is made of polyethylene terephthalate resin, polyurethane resin, or rubber.

Images