JP2006256169A - Rolled web roll of laminated web, lamination method for laminated web, and package - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the running cost of an adhesive so that water adhesion is substantially carried out by applying water adhesion without using the adhesive or by using a trace amount of the adhesive as an auxiliary means. <P>SOLUTION: A pair of webs in which a single layer film or a laminated web and a film large in moisture permeability are used, and both adhesive surfaces are subjected to treatment to give wettability such as a corona discharge is wound in the shape of a roll while both adhesive surfaces are adhered to each other by a water film formed on the entire surfaces and aged. During the ageing, the water film is diffused outside through the layer of the film large in moisture permeability to be eliminated to make adhesion to provide adhesive strength necessary for a wrapping material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a laminated web roll, a laminated web laminating method, and a package, which are water-bonded without using any adhesive or use a small amount of adhesive auxiliary and are mainly water-bonded.

Conventionally, for bonding for laminating single-layer films, or between single-layer films and laminated films, or laminated films, a solvent-based adhesive or water-based adhesive is applied to the adherend surface of one film, and then the solvent is dried. Alternatively, water was evaporated and the film was superposed on the surface to be bonded of the other film and rolled by applying a rolling pressure to perform aging. For adhesion for laminating films, for example, as shown in Patent Document 1, an adhesive is always used.
JP 2004-237668 A

When using a solvent-based adhesive, it will cause air pollution and will generate and deposit carbon dioxide which decomposes in the atmosphere and causes global warming, and remains on the adherend surface of the laminated web. It is supposed to give a smell to the package. According to the Saitama Prefecture regulations, the use of solvent-based adhesives is subject to the recovery of solvents such as toluene that has volatilized. Then, although use of a water-based adhesive is progressing, water is a solvent and the kind of binder polymer is limited.
In both cases, the solvent-based adhesive and the water-based adhesive use a quantity of about 5 liters for an area of 1000 m with a width of 500 mm, and occupy a large cost for stacking packaging materials.

The present invention is a web roll of a laminated web that does not require the running cost of the adhesive so that it can be said that it is water adhesion that does not use an adhesive at all or an adhesive is used in a small amount and water adhesion is the main component, It aims at providing the lamination | stacking method of a lamination | stacking web, and a package.
In addition, the present invention eliminates the cause of air pollution and causes global warming by using water adhesion without using any adhesive or by using a small amount of adhesive and using water adhesion mainly. Eliminating the discharge of causative substances that generate carbon dioxide gas, eliminating the causative substances that are supposed to give odors to the packaged items, and remaining on the adhesive surface of the laminated web, and on the condition of recovery of solvents such as volatilized toluene It can cope with the abolition of the use of solvent-based adhesives as seen in the regulations of the Saitama Prefecture Ordinance.

  An original fabric roll of a laminated web according to the invention of claim 1 is an original roll of a laminated web obtained by laminating a single layer film or a laminated web and a highly moisture permeable film, on both adherend surfaces. Corona discharge is applied to wettability such as corona discharge, and an ultra-thin water film formed on the entire surface of both adherents is interposed to eliminate the residual air, and is aged by winding in an ultra-thin film roll. The water film diffuses to the outside through the film layer having high moisture permeability and disappears, and has a necessary adhesive strength as a packaging material.

  The method for laminating a laminated web according to claim 2 is a laminated web having a bonding strength required for a packaging material by bonding a single layer film or a laminated web and a pair of highly moisture permeable webs with water. A method of using a highly moisture permeable film as a film layer to be bonded to at least one of the pair of webs and imparting wettability such as corona discharge to both bonded surfaces. After forming a water film for eliminating bubbles remaining on the contact surfaces of each web, the water film between the surfaces to be bonded is squeezed by passing between a pair of rolling rolls and pressing and pressing. After that, it is wound up into a roll shape, and then aging is performed to diffuse the water film remaining between the adherend surfaces to the outside through the highly moisture permeable film so that the adherend surfaces need to be used as a packaging material. Wherein the obtaining a Do adhesive strength.

A method for laminating a laminated web according to the invention described in claim 2 is a configuration relating to a technique for manufacturing a raw roll of the laminated web according to claim 1.
The inventions according to claims 1 and 2 are characterized in that printing is not performed on any surface to be bonded of a pair of webs.

  The raw roll of the laminated web according to the invention described in claim 3 is a raw roll of a laminated web obtained by laminating a single layer film or a laminated web and a film having a high moisture permeability, on both adherend surfaces. While a pair of webs subjected to a treatment for imparting wettability such as corona discharge is adhered with an adhesive applied at least on both side edges between the adherend surfaces in a linear form or in a dot form over the entire adherend face The film is aged by adhering with a water film formed on the entire surface of both adherends, wound in a roll shape, and the water film diffuses to the outside through the film layer having high moisture permeability and disappears and adheres during the aging. It has the necessary adhesive strength as a packaging material.

  A method for laminating a laminated web according to the invention described in claim 4 is a laminated web having a bonding strength required for a packaging material by bonding a single layer film or a laminated web and a pair of highly moisture permeable webs with water. A method of using a highly moisture permeable film as a film layer to be bonded to at least one of the pair of webs and imparting wettability such as corona discharge to both bonded surfaces. In addition, the adhesive is applied linearly on at least both side edges of one or both of the adherend surfaces of the web or in the form of dots over the entire adherend surface to eliminate residual bubbles on the adhesion surfaces of each web. After forming a water film, the film is passed between a pair of rolling rolls and closely contacted and pressurized to squeeze out the water in the water film between the adherend surfaces, and then wind it into a roll, and then perform aging. Characterized in that to obtain a bonding strength necessary for packaging material said infiltrated diffuse surface to be adhered to each other to a large film of a water film remaining in the moisture permeability between the bonded surfaces by.

According to a fourth aspect of the present invention, there is provided a method for laminating a laminated web according to a third aspect of the present invention, which is related to a manufacturing technique for a raw roll of the laminated web.
The invention described in claims 3 and 4 is characterized in that printing is not performed on any adherend surface of the pair of webs, and a small amount of adhesive is applied to any adherend surface of the pair of webs. During the aging process, the water film diffuses to the outside through the highly moisture permeable film layer and disappears, causing transpiration from the edge of the adhesive surface and air intrusion from the same edge to the adhesive surface. It is a feature that is completely absent.

  The raw roll of the laminated web according to the invention described in claim 5 is a raw roll of a laminated web obtained by laminating a single layer film or a laminated web and a film having high moisture permeability, Use a highly moisture-permeable film for the film layer that is to be bonded to the non-printed web that is printed on the bonded surface. A pair of webs that have been treated to impart wettability, such as corona discharge, to any unbonded surfaces are bonded and laminated with a water film formed on the entire surface of both surfaces to be bonded. A roll is wound as a web and aged, and the water film is diffused to the outside through the highly moisture permeable film layer during the aging, thereby having a necessary adhesive strength as a packaging material. Toss .

  The method for laminating a laminated web according to the invention described in claim 6 is a pair of webs which are a single layer film or a laminated web and a highly moisture permeable film, and printing is performed on the adherend surface of one of the webs. Is a laminated web having a bonding strength required for the packaging material by bonding with water, and the film layer that becomes the bonded surface of the web not printed on the bonded surface is transparent. Corrosive discharge and other wettability treatments are applied to both the adherend surface where printing is performed and the adherend surface where printing is not performed, using highly wet films, and bubbles are formed on the adhesive surfaces of each web. After forming a water film to eliminate the residue of water, it is passed between a pair of rolling rolls to closely contact and pressurize to squeeze out water in the water film between the adherend surfaces, and then wind up into a roll, and then Aging to Characterized in that to obtain a bonding strength necessary for packaging material said infiltrated diffuse surface to be adhered to each other to a large film of a water film remaining in the moisture permeability between the bonded surface by the.

A method for laminating a laminated web according to the invention described in claim 6 is a configuration relating to a technique for manufacturing a raw roll of the laminated web according to claim 5.
The inventions according to claims 5 and 6 are characterized in that printing is performed on the adherend surface of one of the pair of webs. Printing may be reverse printing or front printing.

  The raw roll of the laminated web according to the invention of claim 7 is a laminated roll of a laminated web obtained by laminating a single layer film or a laminated web and a highly moisture permeable film, Use a highly moisture-permeable film for the film layer that is to be bonded to the other side of the web that has been printed but not printed. Applying a treatment for imparting wettability such as corona discharge to any of the unbonded surfaces, the adhesive is linearly formed on at least both side edges of the bonded surface of one or both of the webs, or on the entire surface of the bonded surface. A pair of webs applied in the form of dots are bonded by applying a rolling pressure with a water film formed on the entire surface of both adherends, wound in a roll as a laminated web, and aged to form the water film during the aging. The moisture permeable Characterized in that it has adhesive strength necessary as a packaging material by being diffused to the outside through the hearing film layer.

  The method for laminating a laminated web according to the invention described in claim 8 is a pair of webs which are a single layer film or a laminated web and a highly moisture permeable film, and printing is performed on the adherend surface of either one of the webs. Is a laminated web having a bonding strength required for the packaging material by bonding with water, and the film layer that becomes the bonded surface of the web not printed on the bonded surface is transparent. Applying wettability such as corona discharge to both the adherend surface where printing is performed and the adherend surface where printing is not performed using a film with high wettability, and applying one or both adhesives A pair of the webs is applied linearly on at least both side edges of the adherend surface or in the form of dots over the entire adherend surface, and a water film is formed on the close contact surface of each web to eliminate residual bubbles. Pass between rolling rolls A film having a high moisture permeability is formed by pressing and pressurizing to squeeze out water in the water film between the adherend surfaces and then winding it into a roll, and then performing aging. It is characterized in that the adhesive strength required for the packaging material is obtained between the adherend surfaces by permeating and diffusing inside.

  According to an eighth aspect of the present invention, there is provided a laminated web laminating method according to the seventh aspect of the present invention, which is related to a manufacturing technique for a laminated web original roll.

  The inventions according to claims 7 and 8 are characterized in that printing is performed on any of the surfaces to be bonded of the pair of webs, and a small amount of adhesive is applied to any of the surfaces to be bonded of the pair of webs. During coating and auxiliary bonding, the water film diffuses and disappears through the highly moisture permeable film layer during aging, evaporates from the edge of the adhesive surface, and air enters the adhesive surface from the same edge. It is a feature that makes it completely absent. Printing may be reverse printing or front printing.

The package according to the invention according to claim 9 is:
An article to be packaged is accommodated in a bag made by the raw roll of the laminated web according to any one of claims 1, 3, 5, and 7, and the opening is closed.
The form of the bag is three-sided bag, four-sided bag, stand pouch and other bottom gusseted bag, stand pack bag with side gusset and square bottom, stand pack with bottom gusset and side gusset, bag making machine Pillow packaging bags, stand-pack type pillow packaging bags, vertical pillow packaging bags, stand-pack type vertical pillow packaging bags, horizontal pillow packaging bags, stand-pack type horizontal pillow packaging bags, side gusset This includes bags with a header at the top of the bag, bags that are open or slanted, bags with cut tape, zippers, and surface fasteners, and all other bags.

  According to the present invention, a single-layer web or a laminated web and a film having a high moisture permeability are laminated. The present invention is not limited to the lamination of films with high moisture permeability. A film having a high moisture permeability includes a so-called sealant film. However, moisture permeability is related to thickness. The moisture permeability of 20 μm biaxially oriented polypropylene (OPP) is equivalent to the moisture permeability of 40 μm unstretched polypropylene (CPP), and the moisture permeability of 80 μm low density polyethylene (LDPE).

  Therefore, if a laminate of low-density polyethylene (LDPE) and unstretched polypropylene (CPP) is used, the low-density polyethylene is 80 μm and the unstretched polypropylene is 40 μm. It can be secured. If biaxially stretched polypropylene (OPP) and unstretched polypropylene (CPP) are laminated, biaxially stretched polypropylene (OPP) is 20 μm and unstretched polypropylene is 40 μm. Necessary moisture permeability can be secured. In the present invention, the film having a high moisture permeability mainly refers to polyethylene, and there are polystyrene and PET (polyethylene terephthalate) as films having a moisture permeability higher than that of polyethylene. High-density polyethylene film and unstretched polypropylene (CPP) are also included in the highly moisture-permeable film in the present invention because they have higher moisture permeability than biaxially stretched polypropylene (OPP).

  In many cases, the packaging material is printed on the laminated adhesive surface. The adhesiveness of the printed part is lower than that of the non-printed part and varies depending on the type of ink. The adhesiveness of the printed part is also caused by the fact that the surface roughness of the ink increases and microbubbles are left behind on the adhesive surface. When printing is provided on the laminated adhesive surface, in the case of a laminated web composed of two layers, the outer layer and the inner layer, the outer layer, the intermediate layer, and the inner layer are printed on the back side of the outer layer or the inner layer. In the laminated web consisting of the three layers, the back surface is printed on the adherend surface of the outer layer or the front surface is printed on the adherend surface of the intermediate layer.

  Therefore, in the present invention, the printed portion is subjected to a treatment for enhancing the wettability by corona discharge or the like, and a water film is formed on the entire adherend surface during the adhesion lamination, and the unevenness grasped as the surface roughness of each adherend surface. It is decided to eliminate the air present. In this case, when the water film is thick, air easily penetrates into the place where water droplets are gathered and flow due to the action of gravity, so that the water easily enters and prevents adhesion. A web or laminated web and a highly moisture permeable film are passed through a pair of rolling rolls and pressed to form a water film by continuously supplying water to the upstream side of the rolling site to form a water film. By removing all the air present in the unevenness grasped as the surface roughness of the adherend surface and further squeezing out the water forming the water film by rolling as much as possible, it becomes less susceptible to gravity action and becomes water droplets A submicron water film that is difficult to collect. Furthermore, when a pair of webs are bonded as thin films as possible, they are rolled up and aged at 30 ° C. to 40 ° C. for 2 to 3 days to diffuse the water film to the outside through a highly permeable film. I am going to let you. When the water film diffuses to the outside through a highly moisture-permeable film due to aging, the laminated adhesive surface is evacuated and 1 atm is applied, and the van der Waals force, which is an intermolecular attractive force, acts greatly to produce the adhesive strength required as a packaging material. Become.

  A film to be laminated by adding a slight amount of alcohol, surfactant, polyethyleneimine, polybutadiene, water-based urethane adhesive, etc. to the water for forming a water film on the entire surface to be adhered. Depending on the combination, it is effective for increasing the adhesive strength.

  It is conceivable that the water film in the vicinity of the edge of the laminated adhesive surface evaporates from the edge without osmotic diffusion in the highly permeable film during aging. When not only the water film in the vicinity of the edge of the laminated adhesive surface but also the water film in the middle of the width direction of the laminated adhesive surface evaporates from the edge of the laminated adhesive surface, no vacuum is formed at that location and 1 atm is not applied. Since van der Waal force does not act, adhesive strength is not generated. If this happens somewhere in one place, it will be defective. In the present invention, in order to prevent defective products, at the time of close lamination of a pair of webs, at least both side edges between the adherend surfaces are bonded linearly or with an adhesive applied in the form of dots over the entire adherend surface. As a result, the water film near the edge of the laminated adhesive surface can be prevented from evaporating from the edge, and the water film in the middle of the laminated adhesive surface in the width direction can be evaporated from the edge of the laminated adhesive surface. Can be blocked.

  Since the biaxially stretched polypropylene (OPP) having a thickness of 20 μm and the aluminum foil are laminated with a biaxially stretched polypropylene having a thickness of 20 μm, the moisture permeability necessary for adhesion can be secured, and therefore the laminate adhesive technique of the present invention can be applied. Since the laminate of biaxially stretched polypropylene (OPP) having a thickness of 20 μm printed on the backprint and the aluminum foil has low moisture permeability of the backprinted portion of the biaxially stretched polypropylene, in order to obtain the necessary adhesive strength, When the adhesive strength is reinforced by the adhesive applied in the form of dots over the entire surface to be bonded and the aging days are increased, the water film penetrates the ink film and penetrates and diffuses into the biaxially stretched polypropylene film. Adhesive strength can be obtained.

  Therefore, according to the present invention, one of the webs to be laminated is laminated with a laminating web composed of a single layer film and an aluminum foil, such as biaxially stretched polypropylene and biaxially stretched nylon, with a large moisture permeability. Subsequently, a three-layer laminated film obtained by laminating the laminated web and the sealant film by the lamination technique of the present invention is also included in the object, and a laminated film having four or more layers is also included in the object.

  The water used in the lamination technique of the present invention may be pure water, ionic water, tap water or the like. In addition, it is preferable to preliminarily impart wettability by spraying water containing a silane coupling agent and the like to dryness before performing the treatment of imparting wettability by corona discharge. .

According to the laminated web roll of the present invention, the laminated web laminating method, and the package,
It is water bonding that does not use adhesives at all, or because it is mainly water bonding with a small amount of auxiliary use of adhesive, the running cost of the adhesive is not so high that it can be said that water bonding is the main component. , Eliminate the cause of air pollution, eliminate the causative substances that generate carbon dioxide, which causes global warming, and the causative substances that are supposed to give odor to the packaged items remain on the adhesive surface of the laminated web It is possible to cope with the abolition of the use of solvent-based adhesives as seen in the regulations of the Saitama Prefecture regulations that require the recovery of volatile solvents such as toluene.

Conventionally, in both cases, the solvent-based adhesive and the water-based adhesive have an amount of about 5 kg (5 liters) [30% solids] for an area of 500 m ² (= width 500 mm × length 1000 m). The present invention occupies a large cost for the lamination of the packaging material, whereas the present invention as described in claims 3, 4, 7, 8, even when an adhesive is used, The amount of adhesive used is about 0.1 Kg (0.1 liter) [30% solids for an area of 500 m ² (= width 500 mm × length 1000 m) because it is the minimum auxiliary use instead of a coat. Minutes], and the cost of the adhesive hardly occurs.

  Embodiments of a raw roll of a laminated web according to the invention described in claim 7 and a method for laminating the laminated web as claimed in claim 8 will be described with reference to the drawings. Since this invention can grasp | ascertain the invention of Claims 1-6, description of embodiment of the invention of Claims 1-6 is abbreviate | omitted.

  In FIG. 1, reference numeral 1 is a corona discharge treatment apparatus, reference numeral 2 is a gravure coating type adhesive application apparatus comprising an impression cylinder, a plate cylinder, a doctor, an ink dish, etc., reference numeral 3 is an adhesive solvent drying apparatus, and reference numeral 4a. Reference numeral 4b denotes a pair of rolling rolls for bonding, reference numeral 5 denotes a watering nozzle, reference numerals 6, 7, and 8 denote guide rolls, reference numeral 9 denotes a winding shaft, and reference numeral 10 denotes a winding roll for the laminated web W. .

  Moreover, in FIG. 1, the code | symbol W1 is an outer layer side film, and the code | symbol W2 is an inner layer side film. The outer layer side film W1 is a single layer film or a laminated web [a multilayer between films or a multilayer between a film (surface layer) and an aluminum foil (intermediate layer)].

  When manufacturing a laminated web consisting of three layers of an outer layer, an intermediate layer, and an inner layer, the inner layer side film W2 is not a sealant film at the stage of producing a laminated web of an outer layer and an intermediate layer. In the step of laminating the outer layer and the intermediate layer to form a two-layer laminated web, and then laminating the intermediate layer and the inner layer of the two-layer laminated web, the inner layer side film W2 is a sealant film.

  The outer layer side film W1 is a single layer film which is, for example, a polyester film (PET) having a thickness of 20 μm, a biaxially stretched polypropylene film or a biaxially stretched nylon film. The inner film W2 is a high density polyethylene (LLDPE), a low density polyethylene (LDPE) having a thickness of 30 μm to 60 μm, or an unstretched polypropylene film (CPP) having a thickness of 30 μm to 40 μm.

  The outer layer side film W1 includes a printed film and a surface printed or back printed film. The printing is performed by a gravure rotary printing machine or a fuso printing machine (not shown) which is an outline.

The outer layer side film W1 and the inner layer side film W2 are passed through the corona discharge treatment apparatus 1 and subjected to a corona discharge of about 40 dyn / mm ² on the adherend surface to impart wettability. When wettability is imparted, water easily adheres and van der Waal force easily acts.

  The corona discharge treatment may be performed in the last step of the printing line, but it is more effective to perform the corona discharge treatment immediately before the film is bonded. For the reverse printing surface, the adhesion strength can be increased by performing a corona discharge treatment.

  The surface to be bonded of the outer layer side film W1 is applied linearly or in the form of dots over the entire surface to be bonded by the gravure coat type adhesive application device 2 so as to have an interval of, for example, 30 mm to 50 mm. It is sufficient that the linear coating is provided at least in the vicinity of both side edges. The distribution of dots adhered in a dot shape is sufficient to be less than the distribution of the highest highlight portion in gravure printing. Accordingly, the adhesive solvent drying device 3 is short and requires a small amount of heat generation, so that the line can be made small.

  The application of the adhesive to the adherend surface of the outer layer side film W1 is performed as necessary depending on the type of the outer layer side film W1, the size of the area where the back printing is performed, and the type of ink. For example, in the case of laminating a polyester film not subjected to back printing and a sealant film, it is not necessary to apply an adhesive to the adherend surface of the outer layer side film W1. On the other hand, it is preferable to apply an adhesive to a polyester film on which reverse printing is performed.

  The outer layer side film W1 and the inner layer side film W2 pass between the pair of rolling rolls 4a and 4b while being pressed and in close contact with each other. Before the outer layer side film W1 and the inner layer side film W2 are passed between the pair of rolling rolls 4a and 4b, the outer layer side film W1 is sprayed from the watering nozzle 5. The water sprayed from the water spray nozzle 5 reaches the rolling pressure part of the pair of rolling rolls 4a and 4b to form the water storage part P. The water in the water storage portion P expels air from the surfaces of both films before the outer layer side film W1 and the inner layer side film W2 are brought into close contact with each other by the rolling pressure of the pair of rolling rolls 4a and 4b. As a result of providing wettability to the adherend surface of the outer layer side film W1 and the inner layer side film W2 in advance, the hydrophilicity of the adherend surface is ensured, so that the water in the reservoir P completely removes air from the film surface. Can be driven out. Giving wettability to the adherend surface printed on the back side of the outer layer side film W1 can ensure a large hydrophilicity even to the printed portion, and the adherend surface of the outer layer side film W1 with water from the water storage part P It is essential to impart wettability to the printed part.

The outer layer side film W1 and the inner layer side film W2 are in close contact with each other with a water film by the rolling pressure of the pair of rolling rolls 4a and 4b. The state of the cross section at this time is shown in FIG.
By increasing the rolling pressure of the pair of rolling rolls 4a and 4b, a water film of submicron or less is formed, and excess water for forming the water film is squeezed out to the water storage part P. For this reason, the amount of water used to form the water film is about 0.5 liters for an area of 1000 m with a width of 500 mm. Accordingly, the water spray from the water spray nozzle 5 is performed for a short time before the water storage part P is constantly monitored by the sensor and becomes insufficient.

  The outer layer-side film W1 and the inner layer-side film W2 that are in close contact with each other through a submicron or less water film are wound around the winding shaft 9 to become the raw roll W of the laminated web. The raw roll of the laminated web wound up to a certain length is aged at 30 ° C. to 40 ° C. for 2 to 3 days with the winding end being stopped with an adhesive tape so as not to unwind.

  The water film present on the laminated adhesion surface at the initial stage of aging diffuses to the outside through the film layer having a low moisture permeability which is the laminated adhesion surface as the aging progresses and disappears from the laminated adhesion surface. For this reason, water molecules disappear on the laminated adhesion surface, and a pressure of 1 atm is applied to the laminated adhesion surface, and the intermolecular distance constituting the film facing the laminated adhesion surface is reduced, and van der Waal force acts to make the adhesion from adhesion to adhesion. change. Also here, imparting wettability to the adherend surfaces of the outer layer side film W1 and the inner layer side film W2 is involved in increasing the adhesive force. When the water film disappears, the water sprayed from the water spray nozzle 5 contains, for example, 1% to several percent of a silane coupling agent in order to have a binding function molecule that is greatly involved in adhesion on the laminated adhesion surface. preferable. Adhesion between all types of films does not change to adhesion, but, for example, in the case of water adhesion between a polyester film and a sealant film, a sufficiently large adhesion strength required for the packaging material can be obtained.

  FIG. 3 is an enlarged front view showing an apparatus for carrying out the laminated web laminating method according to the second embodiment of the present invention.

  In FIG. 3, reference numeral 11 is a corona discharge treatment apparatus, reference numeral 12 is a gravure coating type adhesive application apparatus comprising an impression cylinder, a plate cylinder, a doctor, an ink dish, etc., reference numeral 13 is an adhesive solvent drying apparatus, and reference numeral 14 a Reference numeral 14b is a pair of rolling rolls for bonding, reference numeral 15 is a watering nozzle, reference numerals 16, 17, 18, 19, and 20 are guide rolls, reference numeral 21 is an original roll of the outer layer side film W1, and reference numeral 22 is Reference numeral 23 denotes an original roll of the outer layer side film W2, and a reference numeral 23 denotes a winding roll of the laminated web W of the outer layer side film W2 and the outer layer side film W2.

  There is no substantial difference between the apparatus shown in FIG. 3 and the apparatus shown in FIG. In the apparatus shown in FIG. 3, since the solvent drying device 13 for the adhesive is long, the drying capacity is large, and the solvent is applied after firmly applying the adhesive with the adhesive coating device 12 to both edges of the laminated surface of the outer film W1. Ensure that it can be dried. In view of the line configuration, the corona discharge treatment device 11 is divided into those for irradiating the outer layer side film W1 and those for irradiating the outer layer side film W2.

Table 1 shows that the apparatus shown in FIG. 3 drops water just before the nip, bonds two kinds of films at a line speed of 50 m / min, and stores them in an aging room at 35 ° C. for 2 days (48 hours). It shows the result of measuring the tension at that time by grabbing the edges of the two types of films that are not bonded and separating them from each other.
This is a test to see how much force is peeled off when a so-called 180 degree roll is performed. In the case of using a conventional adhesive, the adhesive strength has a peel strength of about 500 g / 15 mm, which is about 180 degrees, so the PE / PE combination is close to the adhesive strength that can be practically used for various packaging. The OP / PE combination has a low numerical value, but it can be easily applied to individual packaging such as bags. The combination of Nyl / PE is not at a level where the two films can be peeled off even by hand, and can be used practically for packaging.

Tables 2 and 3 show that the apparatus shown in Fig. 3 drops water just before the nip and bonds two kinds of films (back-printed OPP # 30 and PE) at a line speed of 50m / min. Then, after storing for 2 days (48 hours), it is cut into a width of 15 mm, the edges of the two types of films that are not bonded are gripped and separated from each other, and the tension is measured. The difference between Table 2 and Table 3 is the difference between ink manufacturers.
Even if the bonding strength of OPP # 30 and PE, which are printed in a single color on the back side, is not sufficient, the bonding strength is practical when the white OPP # 30 and PE are bonded together. It is obtained by.

It is an enlarged front view which shows the apparatus which enforces the lamination | stacking method of the lamination | stacking web of embodiment of this invention. It is sectional drawing of the web laminated | stacked with the lamination | stacking method of the lamination | stacking web of embodiment of FIG. It is an enlarged front view which shows the apparatus which enforces the lamination | stacking method of the lamination | stacking web of the 2nd Embodiment of this invention.

Explanation of symbols

W Raw roll of laminated web W1 Outer layer side film W2 Inner layer side film 1 Corona discharge treatment device 2 Adhesive coating device 3 Adhesive solvent drying device 4a, 4b A pair of pressure roller 5 Sprinkling nozzle 6, 7, 8 Guide roll 9 Winding shaft 11 Corona discharge treatment device 12 Adhesive coating device 13 Adhesive solvent drying device 14a, 14b A pair of rolling rollers 15 Sprinkling nozzles 16, 17, 18, 19, 20 Guide roll 21 Original film of outer layer side film Roll 22 Original film roll 23 of outer layer side film Winding roll of laminated web

Claims (9)

  A raw roll of a laminated web in which a single layer film or laminated web and a film with high moisture permeability are laminated, both of which are subjected to a treatment for imparting wettability such as corona discharge to both adherend surfaces. An ultra-thin water film formed on the entire surface of the bonding surface is interposed to eliminate the residual air and is aged by winding in an ultra-thin film roll, and the water film diffuses outside through the highly moisture-permeable film layer during the aging. A laminated web roll, which disappears and has the necessary adhesive strength as a packaging material.   A web laminating method in which a single layer film or a laminated web and a pair of highly moisture permeable webs are bonded with water to form a laminated web having a bonding strength required for a packaging material, and at least one of the pair of webs In order to eliminate residual air bubbles on the adhesive surfaces of each web, a film with high moisture permeability is used for the film layer to be adhered to, and wettability such as corona discharge is applied to both adhered surfaces. After forming a water film, the water film between the adherend surfaces is squeezed out and wound up into a roll, and then aged. A method for laminating a laminated web, characterized in that a water film remaining between the adherend surfaces is diffused to the outside through the highly moisture permeable film to obtain an adhesive strength required for a packaging material between the adherend surfaces. .   A raw roll of a laminated web obtained by laminating a single layer film or laminated web and a highly moisture permeable film, and a pair of webs subjected to a treatment for imparting wettability such as corona discharge to both adherend surfaces. In addition, at least both side edges between the adherend surfaces are linearly or adhered by an adhesive applied in the form of dots over the entire adherend surface and adhered by a water film formed on the entire surface of both adherend surfaces. It has a necessary adhesive strength as a wrapping material because it is aged by being wound in a roll shape, and the water film diffuses and disappears outside through the film layer with high moisture permeability during the aging. A web roll of laminated web characterized by   A web laminating method in which a single layer film or a laminated web and a pair of highly moisture permeable webs are bonded with water to form a laminated web having a bonding strength required for a packaging material, and at least one of the pair of webs The film layer to be bonded surface is made of a highly moisture permeable film, and both the bonded surfaces are treated to give wettability such as corona discharge, and the adhesive is bonded to one or both of the webs. Apply linearly on at least both side edges of the surface or in the form of dots over the entire surface to be bonded, and form a water film on the contact surface of each web to eliminate residual bubbles. The water film between the adherend surfaces is squeezed out and then rolled up into a roll, and then aging is performed to remove the water film remaining between the adherend surfaces. The method of laminating the laminated web, characterized in that to obtain a bonding strength required for the packaging material surface to be adhered to each other by permeate and diffuse large film.   A raw roll of a laminated web in which a single-layer film or laminated web and a highly moisture permeable film are laminated, and printing is performed on the adherend surface of any one of the webs, and printing is not performed. For the film layer to be bonded surface of the web, a highly moisture permeable film is used, and the wetted surface such as corona discharge is applied to both the bonded surface where printing is performed and the bonded surface where printing is not performed. A pair of webs subjected to the treatment to be applied is bonded by applying a rolling pressure with a water film formed on the entire surface of both adherends, wound into a roll as a laminated web, and aged, and the water film during the aging A raw roll of laminated web, characterized by having a necessary adhesive strength as a packaging material by diffusing to the outside through the film layer having high moisture permeability.   A single-layer film or a laminated web and a highly moisture-permeable film, and a pair of webs printed on the adherend surface of one of the webs is bonded with water to provide the necessary adhesive strength for the packaging material A web laminating method for a web, wherein a film layer having a high moisture permeability is used for a film layer to be a bonded surface of a web that is not printed on a bonded surface, and the bonded surface is printed. And applying a treatment for imparting wettability such as corona discharge to any of the non-printed surfaces to be bonded, and after forming a water film for eliminating bubbles remaining on the close contact surface of each web, a pair of Water film remaining between the adherend surfaces by passing between the rolling rolls, pressing and pressing the water film between the adherend surfaces to squeeze the roll, and then aging. The moisture permeable The method of laminating the laminated web, characterized in that to obtain a bonding strength required for the packaging material surface to be adhered to each other by permeate and diffuse into the hearing film.   A raw roll of a laminated web in which a single-layer film or laminated web and a highly moisture permeable film are laminated, and printing is performed on the adherend surface of any one of the webs, and printing is not performed. For the film layer to be bonded surface of the web, a highly moisture permeable film is used, and the wetted surface such as corona discharge is applied to both the bonded surface where printing is performed and the bonded surface where printing is not performed. A pair of webs that are applied in a linear manner on at least both side edges of the adherend surface of one or both of the webs or in the form of dots over the entire adherend surface are applied to the entire surface of both adherend surfaces. The film is rolled and aged as a laminated web, and is aged by diffusing with a water film to be formed, and the water film is diffused to the outside through the highly moisture permeable film layer during the aging. It has the necessary adhesive strength as a raw fabric roll of the laminated web characterized by.   A single-layer film or a laminated web and a highly moisture-permeable film, and a pair of webs printed on the adherend surface of one of the webs is bonded with water to provide the necessary adhesive strength for the packaging material A web laminating method for a web, wherein a film layer having a high moisture permeability is used for a film layer to be a bonded surface of a web that is not printed on a bonded surface, and the bonded surface is printed. The surface to be bonded is subjected to a treatment for imparting wettability such as corona discharge to any of the surfaces to be bonded, and the adhesive is linearly or coated on at least both side edges of the surface to be bonded of one or both of the webs. The surface to be bonded is applied in the form of dots over the entire surface of the bonding surface, and a water film is formed on the bonding surface of each web to eliminate residual bubbles. Squeeze the water film in between. Adhesive strength required for the packaging material between the adherend surfaces by wrapping in a roll shape and then aging to diffuse the water film remaining between the adherend surfaces into the highly moisture permeable film. A method for laminating a laminated web, characterized in that:   A package comprising: a packaged bag made by a roll of the laminated web according to any one of claims 1, 3, 5, and 7;

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