JPH06344475A - Continuous production of inside and outside different-layer bag, inside and outside different-layer double-side pitch printed bag and continuous production thereof - Google Patents

Abstract

PURPOSE:To produce a bag by folding one film even in an inside and outside different layer bag by superposing the innermost sealable films of inside and outside laminated films one on another in opposed relationship and heat-sealing the superposed inside and outside laminated films. CONSTITUTION:A laminated film 16 having a sealable film as the film layer on the innermost layer side thereof is equally divided or folded in its lateral direction to form inside and outside laminated films 16a, 16b corresponding to the inside and outside of a bag. A bag consisting of mutually different inside and outside laminated films 11, 12 is formed by a different-layer forming process heat-sealing a heat-sealable film 18 to the heat-sealable film 18 on the innermost layer side of one of the inside and outside printed laminated films 16a, 16b. In a heat sealing process, the superposed inside and outside laminated films 11, 12 are heat-sealed at three sides, subjected to back lining or heat-sealed at two sides.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous bag-making method of a bag made of a laminated film having different front and back film configurations, and a laminated film having different front and back film configurations respectively. Pitch printing is applied to this table
The present invention relates to a bag for front and back different layer double-sided pitch printing in which backside printing is superposed one by one at corresponding positions, and a continuous bag-making method thereof.

[0002]

[Prior art]

(1) In the case where the film layers of the front and back laminate films have different configurations, a conventional method for continuously producing a bag made of a laminate film having different front and back film configurations is as follows. When the film layers have different configurations, the front and back laminating films 61,
Each 62 is processed separately and wound into a roll, as shown in FIG.
As shown in FIG. 1, the front and back laminating films 61 and 62 fed from separate feeding rolls are polymerized between the two pinch rolls 53 and 54, and then the front and back laminating films 61 and 62 are three-way heated. Seal, cut so that one side is open, and make a bag.

(2) In the case of printed bag making.

9 to 11, the printed bag has a mark, a logo, a pattern, etc. displayed on the laminated film on the front surface of the bag on one side of the film while equally dividing the width direction. The display is continuously printed one by one in the flow direction of the film at proper intervals (referred to as "pitch printing" in this specification) to perform front surface printing, and on the other side, back surface printing appearing on the laminated film on the back of the bag is performed. A printing film is formed by performing pitch printing at the same pitch as the surface printing at the same time, and another film is laminated on this printing film to form a printing laminate film 58. The method produces double-sided printed bags.

As shown in FIG. 9, the printed laminated film 58 is half-folded by a guide member 57 of a triangular plate so that the printed laminated film 58 is equally divided in the width direction and folded, and the surface of the printed laminated film 58a is printed. And the back printing laminate film 58b printed on the back side with pinch rolls 53, 5
Polymerization is carried out for 4 minutes to form a half-folded film 59. Then
The front and back films are simultaneously heat-sealed at intervals of one frame of the half-folded film 59 and cut to mass-produce each unit bag.

Further, the printing laminate film 58
As shown in FIG. 10 (A), the print laminate film 58a on the front side and the print laminate film 58b on the back side are formed by dividing the print laminate film 58a on the front side and the print laminate film 58b on the back side with the print laminate film 58a on the back side. The guide members 51a and 51b, which are triangular plates, respectively, are slidably contacted with each other and are deflected at right angles to the traveling direction of the film and symmetrically opposite to each other.
As shown in FIG. 0 (B), the guide laminates 52a and 52b, which are floating rolls and are supported so that the axial directions thereof are orthogonal to the traveling directions of the front and back printing laminate films 58a and 58b, are slanted. It is turned to the front and is superposed between the two pinch rolls 53 and 54 so that the corresponding one frames of front and back printing are superposed on each other. Then, this polymerized front and back printing laminated film 5
Each unit bag is mass-produced by heat-sealing and cutting the front and back printing laminate films 58a, 58b at intervals of one frame in the longitudinal direction and the width direction of 8a, 58b.

As another bag-making method, the number of film layers of the front and back laminated films, the material, the thickness of each film layer, and the like are different from each other (also referred to as "front and back different-layer bags" in the present specification). ) In this case, the printed front and back laminated films 61 and 62 are separately processed and wound into rolls, and as shown in FIG. 11, the front and back laminated films are fed from different feeding rolls. 61 and 62 are polymerized between two pinch rolls 53 and 54, and then the front and back laminating films 61 and 62
Is heat-sealed on three sides and cut so that one side is open to make a bag.

Further, as another bag-making method, one of the front side and the back side of the tubular film formed by the inflation method or the like, or by inverting the tubular film,
Pitch printing is applied to both films, and the bottom edge heat-sealed part is formed by heat-sealing the front and back films in the widthwise total length of the tubular film, and intermittently formed at desired intervals in the longitudinal direction of the tubular film. , A bag manufacturing method for mass-producing bags by cutting the front and back films near the bottom edge heat-sealed portion along the entire length in the width direction of the tubular film to simultaneously form the bottom edge of the unit bag and the opening of another bag There is.

[0009]

[Problems to be Solved by the Invention]

(1) In the conventional bag-making method, the two pinch rolls 53, 5 provided on the front and back two laminate films 61, 62 fed from separate feeding rolls as shown in FIG.
In the method of polymerizing for 4 minutes, then heat-sealing the laminated films 61 and 62 on the front and back sides to form a heat-sealed portion, and cutting the bag so that one side is open, and making a bag, two films are Since it is made by polymerizing to make a bag, it is necessary to manufacture a back-attached bag or a gusset bag in which a single film is bent to make a bag, or an L-shaped seal bag and a two-sided seal bag. I can't.

(2) Further, FIGS. 9 and 10A,
In the bag manufacturing method as shown in (B), since the printing laminate film 58 sent out from the same original fabric is equally divided in half in the width direction and half-folded or equally divided and polymerized, If the distances for sending out the laminated films on the back side are kept the same, the corresponding one frames for front and back side printing will not match and shift. However, since the materials are the same, it is not possible with this method to manufacture bags having different configurations such as the number and material of the film layers of the front and back laminated films and the film thickness.

Also, when double-sided pitch printing is performed on the tubular film, the corresponding single frames for front and back printing do not match and shift. However, as a matter of course, there cannot be a bag in which the film layers of the front and back laminated films have different configurations.

(3) On the other hand, in the bag manufacturing method as shown in FIG. 11, two films are printed on the front and back sides, one frame at a time, at the same pitch. The back and back laminated films 61 and 62 are symmetrically arranged on the bag making line so that the front and back laminated films 61 and 62 are sealed at the same distance. Front and back laminated films 61, 62
Even if one side of the back side printing is superposed on the corresponding position,
Because the film layers of the front and back laminating films 61 and 62 have different configurations, the difference in tension may cause the corresponding one frame of front and back printing to gradually shift. When a single bag is manufactured through the steps, there is a problem that one side of the front and back printing of the film on the front side and the back side of the bag is separated, and the printing is divided in the middle.

Therefore, in the case of making bags in which the film layers of the front and back laminate films 61 and 62 have different configurations, one of the front and back laminate films 61 and 62 is pitch-printed. , The other laminated film is continuously printed with a mark such as a mark that does not have a dimensional separation in the film flow direction or a continuous pattern of the same pattern (hereinafter referred to as "endless printing").
Or, nothing was printed, and there was no alternative but to make a bag by polymerizing the front and back laminated films 61 and 62 on the front and back.

(4) Further, in the case of a bag which has been often seen in plastic films for storing confectionery and other favorite items, the contents should not be biased to one side of the bag during transportation or display, or the contents should be shocked. To protect from
We manufacture a tray with unevenness formed on a rather hard plastic sheet, put the contents on this tray and insert it in the bag,
It is a little deaerated and then sealed and packaged.The above tray will be discarded by the purchaser of the product after opening it, but if it is discarded together with other garbage as it is, it will not decay. In addition to causing pollution, there is a problem in terms of high cost and resource saving for tray manufacturing and this insertion step.

[0015]

[Purpose] The present invention was developed to solve the above problems, and two laminated films on the front and back of the bag have different configurations such as the number of film layers, material and thickness. Even a bag (referred to as "front and back different layer bag" in the present specification), which is a conventional back-attached bag or gusset bag in which a single film is folded to make a bag, or an L-shaped seal. Bag and double-sided sticker bag manufacturing method that enables the production of front and back different layer bags, and the front and back side printing of marks, patterns, etc., on the continuous bag manufacturing line, one bag at a time. It is an object of the present invention to provide a front and back different layer double-sided pitch printing bag in which the front side and the back side correspond to each other and a continuous bag-making method thereof, and a continuous bag-making method by which the above-mentioned tray is unnecessary. .

[0016]

[Means for Solving the Problems]

(1) The first continuous bag-making method for front and back different layer bags of the present invention is a laminate film having front and back layers obtained by equally dividing the laminate film 16 having the sealing film 18 as a film layer on the innermost layer side in its width direction. 16a and laminated film 16 on the back
and a sealing step (laminate) film (25) is heat-sealed on the sealing film 18a or 18b on the innermost layer side of one of the front and back laminate films 16a, 16b to form a different film. Different layer forming step of forming the front and back laminated films 11 and 12 forming the film layer, and the innermost sealing film (18a) of the front and back laminated films 11 and 12, respectively.
Or 18b and 25) are opposed to each other and polymerized, and a heat-sealing step of heat-sealing the polymerized front and back laminated films is included.

(2) Further, according to the second method for continuously manufacturing the front and back different layer bags of the present invention, the laminate film 16 having the sealing film 18 as the innermost film layer is bent,
A bending step for forming the front laminated film 16a and the back laminated film 16b, and the sealing film (18a or 18b) on the innermost layer side sealing film (18a or 18b) of the front and back laminated films 16a, 16b. 25) is heat-sealed to form different film layers from each other to form the front and back laminated films 11 and 12, respectively, and a sealing property with the innermost layer (18a or 18b) of the front and back laminated films. It comprises a manufacturing process including a heat-sealing process in which the film (26 or 27) is faced to each other and polymerized, and the polymerized front and back laminated films are heat-sealed.

Further, the heat-sealing step can be carried out by heat-sealing the laminated front and back laminated films 11 and 12 on three sides, on the back, or on two sides.

In the heat-sealing in the different layer forming step, the whole surface of the sealable film is heat-sealed to the sealable film layer on the innermost layer side of one of the front and back laminated films 11 and 12, or a trademark or the like. Character of
It is also possible to form the heat plate 39 (seal bar) so as to represent a figure / symbol and partially perform it, or to form the unevenness by the partial heat sealing.

(3) Further, the front and back different layer double-sided pitch printing bag of the present invention is a double-sided pitch printing bag in which front and back side printing is superposed at corresponding positions one by one and continuously made into bags.
On one side of the film, the width direction is equally divided, and one side has a printing layer formed by simultaneously printing the front side printing on one side and the back side printing at the same pitch on the other side. A printing laminate film formed by laminating as a film layer on the inner layer side, and a printing laminate film on the front side and a printing laminate film on the back side, each of which is formed by equally dividing or bending the printing laminate film in the width direction, and the front side. Backside printing Laminated film consisting of front and back laminating films composed of different film layers formed by laminating the sealing film on one innermost side sealing film of the laminated film, and polymerized front and back laminating film Each side of the film is heat-sealed on three sides of the laminated film on the front and back sides. That.

(4) Further, in the first continuous bag making method for the front and back different layer double-sided pitch printing bags according to the present invention, while the width direction is equally divided on one side of the film, characters, figures, symbols, etc. A printing laminate in which a sealable film is laminated as the innermost film layer on a printing film having a printing layer on which the front side printing and the back side printing of characters, figures, symbols, etc. are printed at the same pitch Display the film
In the step of continuously bag-making the back printing one by one, the print laminate film 16 is equally divided in the width direction thereof, and the front print laminate film and the back print laminate films 16a and 16b are separated. The cutting step of forming and the front and back laminate films in which the sealable film (25) is heat-sealed to the sealable film 18 on one of the innermost layers of the front and back printing laminate films to form different film layers. The different layer forming step for forming 11 and 12 and the distance for feeding the front and back laminated films from the position where the print laminated film 16 is equally divided to the feed rolls 65 and 66 downstream of the next heat sealing step are made the same. Then, the innermost sealing films 18 and 25 of the front and back laminated films 11 and 12 are mutually attached. Polymerizing the combined come consist manufacturing process including a heat-sealing process of heat-sealing the laminated film of the front and back for each frame in the longitudinal direction and the width direction of the polymerized front and back of the laminate film.

(5) Further, according to the second method for continuously forming a double-sided and double-sided pitch-printed bag according to the present invention, one side of the film is equally divided in the width direction and one side of the film is printed with characters, figures, symbols and the like. On the other side, a printing film having a printing layer in which the backside printing of characters, figures, symbols, etc. is printed at the same pitch,
A step of continuously bag-making a printed laminate film formed by laminating a sealing film as a film layer on the innermost layer side in correspondence with front and back side printing one frame at a time, and the printed laminate film 16 in the width direction thereof. A bending step of bending to form the front print laminate film and the back print laminate films 16a and 16b;
The front and back laminate films in which the sealable film (25) is heat-sealed to the innermost sealable film 18a (b) of the front and back print laminate films 16a and 16b to form different film layers. And the feed layers 65 and 66 downstream from the position where the printing laminate film 16 is bent to the feed rolls 65 and 66 downstream of the next heat-sealing process are made to have the same distance to send out the laminate film on the back. Innermost layer sealing film 18a of the back laminated film
(B) and 25 (27) are faced to each other and polymerized, and a heat-sealing step of heat-sealing the laminated film on the front and back for each frame in the longitudinal direction and / or the width direction of the laminated film on the front and back And a manufacturing process including.

Further, the printed laminate film may be included in-line in the bag making line. That is, one side of the film is divided into equal parts in the width direction, and one side is printed at the same time and the other side is printed at the same pitch at the same pitch to form a printing layer, and a printing layer is formed. The printing film laminating step of laminating as the film layer to form the printing laminating film 16 may be performed prior to the cutting step or the bending step.

Further, a single-layer film having double-sided sealability or a laminated film having double-sided sealability can be heat-sealed to the sealable film on the innermost layer side of one of the front and back printing laminate films.

Further, heat-sealing the innermost layer side film layers of both the front and back printed laminate films with different kinds of sealable single-layer films or different innermost layer laminate films. It is also possible to form front and back laminate films respectively forming different film layers.

The film forming the print layer may be formed of an opaque film such as paper or aluminum, and the print layer may be formed on the outer surface of the opaque film.

The heat sealing step may be performed during the filling step of the contents.

Further, in the heat-sealing step, a bag can be made by bending or dividing, and polymerizing the laminated front and back laminated films on three sides, on the back, or by two-side heat sealing.

[0029]

In the bag making method for the double-sided pitch printing bag constructed as described above, at least one of the sealable films 18 on the innermost layers of the front and back (printing) laminate films 16a, 16b is formed during the bag making process. Since the sealing film is heat-sealed, the front and back laminating films 11 and 12 constituting different film layers are formed. Also. One side of the film is divided into equal parts in the width direction, and one side is printed with P1 on the front side and the other side is printed with P2 on the back side at the same pitch.
After the printed laminate film 16 formed by laminating the innermost layer as a film layer is equally divided or folded into the front and back print laminate films 16a and 16b in the width direction thereof, the front and back laminate films 11 and 11,
Since the transfer distance for polymerizing 12 is the same,
One frame corresponding to the back side printing P1 and P2 is sure to correspond to the front side and the back side in the final form of the bag.

[0030]

EXAMPLES Examples will be described with reference to the drawings. Printing step (FIG. 3) This step is not included in the bag making step which is the main part of the present invention together with the following printing film laminating step, but it is known that the case of performing printing and laminating inline is known. As shown in FIG. 3, the printing process is performed by using a gravure printing machine 30 on both sides of the bag in the final form, as shown in FIG. The front and back prints P1 and P2 such as marks and patterns appearing on the screen are continuously printed one frame at a time.

The OPP sheet passes between the plate cylinder 31 and the impression cylinder 32 of the gravure printing machine 30, the ink 33 in the ink tank 34 is applied to the surface of the plate cylinder 31, and pressure is applied by the impression cylinder 32. The ink on the plate cylinder 31 is transferred to the OPP sheet. Front and back surface printing P1, P2 of marks and patterns displayed on the front and back of the final form bag on each half surface of the plate cylinder 31 which divides the axial direction equally.
Version of.

Therefore, the plate cylinder 31 rotates and the OPP
When the sheet is sent out, one side (inner side) of the OPP sheet
The front and back prints P1 and P2 are simultaneously pitch-printed on the respective half surfaces that equally divide the width direction at the same equal intervals, and the front and back prints P1 and P2 of the laminate film on the front surface of the bag are printed with the print layer 21. A printing layer 22 for backside printing P2 of the laminated film on the back of the bag is formed.

It should be noted that a plurality of front and back surface prints P1 and P1 are formed on each half surface that equally divides the circumferential direction of the plate cylinder 31 in the axial direction.
Corresponding versions of P2 may be provided in parallel, in equal numbers. When printing is performed by the plate cylinder 31, a plurality of front and back surface prints P1 and P2, which are arranged in parallel in the width direction of the OPP sheet, are formed on one half surface of the OPP sheet, which is equally divided in the width direction.
Each is pitch printed.

The film on which the front / back printing P1 and P2 is applied may be a paper other than a plastic film, or an opaque film such as aluminum. In this case, the front / back printing P1 is formed on the outer surface of the opaque film. , P2
Since it is necessary to perform the printing, the plate cylinder 31 is a reverse plate (a state similar to a general seal stamp).

Next, the OPP sheet is dried by the dryer 35, and the printing layers 21 and 22 are baked to form the printing film 17.

Printing Film Laminating Step (FIG. 3) As shown in FIG. 3, a sealing film 18 made of CPP having a film thickness of 50 μ is dry laminated on the inner surface of the printing film 17.

That is, the sealing film 18 made of CPP (unstretched polypropylene film) is passed between the coating roll 41 and the rubber roll 42 to apply the adhesive 43 and dried by the dryer 45, and then the sealing film 1
8 is superposed on the inner surface (lower surface in FIG. 3) of the printing film 17, passed between the heating roll 46 and the rubber roll 47 and pressure-bonded to form the printing laminate film 16, which is wound into a roll.

Through the above steps, the printed laminate film 16 composed of OPP50μ / printing layers 21 and 22 / DL / CPP50μ is formed. (Μ is a film thickness, DL is a dry laminate layer; the same applies hereinafter) When the above process is performed in-line, the printing laminate film 16 formed as described above is
Instead of being wound into a roll, it can be continuously transferred to the next step as it is.

The following continuous bag process, for convenience, will be described with reference to the drawings manufacturing process for continuous steel bag front and back different layers sided pitch printing bag, the mere sides different layers bags, printing on the front and back surfaces P1, P2 Need not be polymerized at the corresponding positions, and the same steps are performed except for the constitution for this.

1. The following is a process for continuous bag making using a three-way seal. (1) Cutting Step As shown in FIG. 4, the roll-shaped printed laminate film 16 manufactured as described above is shown from a single feeding roll arranged on a known finely movable turntable. It is sent out intermittently through a known feed roller and dancer roller, cut into equal parts in the width direction by a cutter 37, and divided into a front print laminate film 16a and a back print laminate film 16b.

(2) Next, the printing laminate films 16a and 16b on the front and back sides are respectively separated by approximately 4 in the traveling direction.
Guide bodies 51a and 51b that are inclined at an angle of 5 ° and are symmetrically inclined with respect to the equal dividing line 28 (shown by the alternate long and short dash line in FIG. 4) of the print laminate film 16 are provided.
The inner and outer surfaces of the front and back printing laminate films 16a and 16b are brought into sliding contact with a and 51b (M plate), respectively, and they are deflected at right angles to the traveling direction of the film and symmetrically opposite to each other. The guide bodies 51a and 51b are plate bodies made of a surface material having a small friction coefficient.

Next, the front and back printing laminate films 16a and 16b are folded back through guide bodies 52a and 52b which are floating rolls and are supported so that their axial directions are orthogonal to the respective traveling directions. Two pinch rolls 53 and 54 which are turned obliquely forward (FIG. 4), are located at the same height as the equal dividing line 28, and are in sliding contact with each other.
Between the two pinch rolls 53 and 54 so that the surfaces of the innermost sealing films 18a and 18b face each other and are polymerized.

In this embodiment, the guide bodies 52a and 52b are arranged symmetrically with respect to the equally divided line 28. It should be noted that the present invention is not limited to this in a simple front and back different layer bag in which it is not necessary to superpose the prints P1 and P2 on the front and back sides at corresponding positions.

(3) Different layer forming step (FIG. 5) Further, the CPP 30 μ / DL fed from the feeding roll to between the front and back printing laminate films 16a and 16b which are polymerized between the two pinch rolls 53 and 54. / OPP20μ / DL / CPP30μ is inserted into the sealing laminate film 25, and this sealing laminate film 25 is, as shown in FIG. 5, the sealing film 18b (CPP) on the innermost layer side of the back printing laminate film 16b. Is polymerized into.

The sealable laminated film 25 may be a laminated film in which the film layers on both sides are the sealable films 26 and 27 as shown in FIG.
The structure of the intermediate film layer is not limited.

The sealing laminate film 25 may be replaced with a single layer sealing film.

Further, the sealing laminate film 25 may be polymerized with the sealing film 18a on the innermost layer side of the front printing laminate film 16a.

Further, a different type of film having a single layer of sealing property or a laminate film having an innermost layer having a sealing property is inserted between the front and back printing laminated films 16a and 16b, and one of these different types of film is inserted. Can be polymerized with the front printed laminate film 16a and the other film can be polymerized with the back printed laminate film 16b.

Then, the back printing laminate film 16
As shown in FIG. 5, the b and the sealable laminated film 25 are laminated between the seal pedestal 38 and the heating plate 39 on the bag making line, and CPP30μ / DL / OPP20μ / DL / CPP30μ / C
The back laminated film 12 consisting of PP50μ / DL / printing layer 22 / OPP50μ is formed, and other films cannot be laminated on the front printed laminated film 16a, so the front printed laminated film 16a
It itself becomes the front laminated film 11 and is only transported by the same distance as the back printed laminated film 16b.

When the sealing laminate film 25 is superposed on the printing laminate film 16a shown in the table,
The sealable laminated film 25 and the printed laminated film 16a are heat-sealed between the seal holder 38 and the heating plate 39 in the same manner as described above to form the laminated film 11 on the front side.

The positions of the seal support 38 and the heat plate 39 are turned upside down, and the print laminate film 16a shown in the above table and the print laminate film 16b provided on the back side are arranged.
5 may be turned upside down, and the film on the upper side in FIG. 5 may be used as the back printing laminate film 16b, and the sealing laminate film 25 may be heat-sealed to the back printing laminate film 16b.

The shape of the hot plate 39 is such that the sealing surface is
The entire surface will be flat, but if the unevenness is formed on a grid or continuous rows, or if a trademark etc. is engraved, the film layer becomes thicker The film 16b makes it possible to manufacture a bag that does not require the insertion of a conventional tray.

When the innermost layer of the front and back printing laminated films 16a and 16b are polymerized with different kinds of sealable single-layer films or laminated innermost layers. Is
Sealed pedestal 3 for each polymerized film as above
8 and the hot plate 39 are laminated to form front and back laminated films 11 and 12 which form different film layers.

As shown in FIG. 6, the printing laminate films 16a and 16b on the front and back and the laminate film 25 having a sealing property on both sides are rotated by the rotating heat roller 4 as shown in FIG.
8 and the cooling roller 49 are pressed and heat-sealed to form the front and back different layers.

Further, this method can be performed before the cutting step in FIG. That is, the roll of the printed laminate film 16 in FIG.
A heat roller 48 and a cooling roller 49 are arranged between a and 51b, and for example, a laminated film 25 having a width corresponding to the laminated film 12 on the back side and having a sealing property on both sides to a required position is heat-sealed. It is a thing.

Next, a heat sealing process including cutting into known unit bags is performed.

(4) Heat Sealing Step (FIG. 5) Next, these front and back different layers of the laminated film 11,
12 is the above-mentioned equal dividing line 28 downstream of the flow direction of the film.
The second roll 5 which is located at the same height as and is in sliding contact with each other.
Between 5 and 56, the surface of the innermost sealing film 18a of the front laminated film 11 and the innermost sealing film of the sealing laminated film 25 of the back laminating film 12 are polymerized with each other.

Then, the polymerized front and back laminated films 11 and 12 corresponding to both side edges of the bag are heat-sealed in the flow direction of the front and back laminated films 11 and 12, and further correspond to the bottom edges of the bag. The front and back laminated films 11 and 12 are heat-sealed (three-way heat-sealed) at regular intervals in the width direction to seal both side edges 14 and 1 of the bag.
4 and the bottom edge seal part 15 are formed (FIG. 7). That is, a bag is formed by three-way heat sealing for each frame printed on each surface of the front and back laminated films 11 and 12.

Further, the laminating films 11 and 12 on the front and back sides corresponding to both side edges of the bag are cut in the flow direction.

Further, following the heat seal, feed rollers 65, 6 are inserted through a dancer roller (not shown).
6 are fed at a constant interval by a cutter provided downstream of the feed rollers 65 and 66 in the film flow direction, and laminated films 11 and 12 on the front and back of each bottom edge seal portion 15 of the bag.
Are simultaneously cut in the entire length in the width direction to simultaneously form the bottom edge of one bag and the opening of another bag adjacent to the bag, thereby continuously producing bags.

In FIG. 8, both side edge seal portions 1 when front and back surface printing P1 and P2 are pitch-printed in parallel in two rows in the width direction of the front and back laminating films 11 and 12, respectively.
An example of forming bags 4 and 14 and the bottom edge seal portion 15 (2
The process is similar to that described above.

As described above, the printing laminate film 1
Since 6 is equally divided into the front and back printing laminate films 16a and 16b and the transfer distance to the feed roll is the same for the front and back laminating films 11 and 12, the front and back printing laminating films 16a and 16b are the same. 16
Although b is formed from different layers, front and back printing P1 and P2 of the front and back printing layers 21 and 22 are performed.
The corresponding one frame is surely piled up at the corresponding positions of the front and back in the final form of the bag.

In a simple front and back different-layer bag in which it is not necessary to superpose the prints P1 and P2 on the front and back sides at corresponding positions, the above-mentioned feed is performed after the print laminate films 16a and 16b on the front and back sides are equally divided. It is not necessary to make the transfer distance to the roll the same between the front and back laminate films 11 and 12.

Through the above bag making process, as shown in FIG. 1, the two laminated films 11 and 12 on the front and back are polymerized and heat-sealed on three sides to seal both side edge seal portions 14, 14.
Also, the bottom edge seal portion 15 is formed to obtain a bag having one side opened.

The cross section of the completed bag is constructed as shown in FIG. The laminated film 11 on the front side is composed of a printed laminated film 16a of OPP50μ / printing layer 21 / DL / CPP50μ in order from the outermost layer to the innermost layer. / DL / OPP20μ / DL / CPP30μ Laminated film 25 with sealing properties on both sides
And a printed laminate film 16b of CPP50μ / DL / printing layer 22 / OPP50μ.

The front and back laminated films 11,
The 12 print laminate films 16a and 16b have the same structure except for the display contents of the front and back prints P1 and P2 of the print layers 21 and 22, and the outermost layer OPP50μ can see through the front and back prints P1 and P2. It is transparent or translucent.

Also, the front and back printing laminate films 1
In 6a and 16b, the innermost film layer is the sealing film 18 as in the CPP 50μ of the above-mentioned embodiment, and the sealing laminate film 25 has the film layers on both sides thereof as in the CPP 30μ of the above-mentioned embodiment. 26 and 27.

2. Next, a back-adhesive bag (a central joint seal) in which one film is bent to make a bag, or
A description will be given of a process of manufacturing a bag of different layers such as an L-shaped seal or a two-sided seal and a side-seal bag such as a gusset bag, a standing pouch, and other layers while omitting the portions overlapping with those described above, (1) Half-folding When a half-folding film is used for the bag for folding and making one of these films, the laminate film 16 is formed by the method shown in FIG.
Before the bending step of forming the back and the back laminated film 16b, the sealing film 25 is attached to the front laminated film 16a or the back laminated film 16b.
Is preferably heat-sealed by the method shown in FIG. 5 or 6 to perform the different layer forming step. After that, in the heat sealing step described above, a known L-shaped seal or two-way seal is performed to make a bag.

(2) Gazette Bag, Bag with Back Adhesion In the case of a gusset bag, a strip of the sealing film 25 having a width ⅓ in the width direction of the laminate film 16 is formed at the same time as the step of bending the back adhesion portion. A different layer forming step of heat-sealing the sealing film 25 to the laminated film 16b on the back side may be performed at the same time as the back attaching step in the back attaching step by inserting the laminate film 16 so as to be positioned at the center third. it can.

As is known, in the back-adhesion step, the innermost seal layers of both films are not adhered to each other during back-adhesion between the bent front laminated film 16a and the back-adhered back laminated film 16b. Since a partition plate is inserted according to the size of the bag as a folding guide for forming a fold, the sealing film 25 is attached to the back laminated film 16b by the seal bar in the spine attaching step. Can be heat-sealed.

When a gusset bag manufactured according to the present invention or a half-folded bag is used for automatic filling, it is sufficient to wind up a bag which is not cut in the width direction corresponding to the bottom edge or opening of the bag.

FIG. 2 shows an example of the structure of the film layers of the front and back laminate films 11 and 12 as another example of the double-sided pitch printing bag.
Is composed of a print laminate film 16a in which PET 12μ / printing layer 21 / PE 50μ is arranged in order from the outermost layer to the innermost layer.

The laminating film 12 on the back side comprises, in order from the innermost layer to the outermost layer, a sealing laminating film 25 of PE50μ / AL7μ / NY15μ / PE30μ and a printing laminating film 16b of PE50μ / printing layer 22 / PET12μ. It is laminated. (PET is a biaxially stretched polyester film, PE is a polyethylene film, AL is an aluminum film NY, nylon) Note that this latter bag is similar to the former bag in that it is made of laminated films 11 and 12 on the front and back sides. Printing laminating film 1
6a and 16b are front and back side printing P1 of the printing layers 21 and 22,
Except for the display content of P2, the same configuration is used, and the outermost PET 12μ is transparent or semi-transparent so that the front and back printing P1 and P2 can be seen through.

Also, the front and back printing laminate films 1
6a and 16b each have a PE50 film layer on the innermost layer side.
Like μ, it is a sealing film 18, and the sealing laminate film 25 has PE50 film layers on both sides.
and sealing films 26 and 27 such as PE and PE30μ.

The double-sided pitch printing bag manufactured by the present invention is
It goes without saying that the present invention is not limited to the above-mentioned embodiment.

For example, a transparent film may be laminated on the outer surfaces of the front and back printed films to form the front and back printing laminate films 16a and 16b, or the inner and outer surfaces of the front and back printed films may be formed. Another film may be laminated between the sealing films 18a and 18b.

Further, an opaque film of paper, aluminum or the like can be provided as the outermost layer. In this case, it is necessary to form the printing layers 21 and 22 on the outer surface of the outermost opaque film.

The sealing laminate film 2 is also used.
5 may be a laminate film having any structure as long as the innermost sealing surface or film layer is a sealing film.

Further, the front printed laminated film 16a
The sealing laminate film 25 may be heat-sealed and laminated to form the front laminate film 11, and the front and back print laminate films 16a,
16b may be heat-sealed with a single layer film of different kinds or a sealing laminate film composed of different film layers.

[0080]

Since the present invention is constructed as described above, it has the following effects.

The laminate film 16 having the sealable film as the innermost film layer is equally divided or bent in the width direction to form a front laminate film corresponding to the front and back of the bag and back laminate films 16a and 16b. Form. The front and back laminated films 16a, 16
By the different layer forming step of heat-sealing the sealing film on the sealing film 18 on one innermost layer side of b,
Front and back laminate films 11 and 12 which are different layers from each other are formed.

Also, different distances are formed by making the same distances for feeding the front and back laminate films from the position where the printed laminate film printed by double-sided pitch printing is equally cut or bent to the feed roll downstream of the final heat sealing step. Front and back laminated film 1
The front and back sides P1 and P2 of 1 and 12 are aligned or corresponded in the final form of the bag one by one.

In the different layer forming step, the sealing film layer on the innermost layer side of one of the front and back laminate films is partially formed so as to represent the entire surface of the sealing film or the letters, figures and symbols. Or, by the heat sealing method of forming unevenness by the partial heat sealing,
A tray for protecting the contents and preventing the contents from being jammed in the bag is unnecessary, which is effective in saving resources and preventing pollution.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a double-sided pitch printing bag manufactured by the bag manufacturing method of the present invention.

FIG. 2 is a cross-sectional view of a main part taken along the line BB of FIG.

FIG. 3 is a schematic view of a manufacturing process for manufacturing a printed laminated film 16.

FIG. 4 is a perspective view showing a part of a bag-making process for the double-sided pitch printing bag of the present invention.

FIG. 5 is a schematic manufacturing process diagram showing a part of the bag manufacturing process of the double-sided pitch printing bag of the present invention.

FIG. 6 is a schematic manufacturing process diagram showing a part of the bag manufacturing process of the double-sided pitch printing bag of the present invention.

FIG. 7 is a schematic manufacturing process diagram showing a part of the bag manufacturing process of the double-sided pitch printing bag of the present invention.

FIG. 8 is a schematic manufacturing process diagram showing a part of the bag manufacturing process of the double-sided pitch printing bag of the present invention.

FIG. 9 shows a part of a conventional bag-making process.

FIG. 10 (A) shows a part of another conventional bag-making process. FIG. 10B is a manufacturing process schematic diagram showing a post-process of FIG. 10A.

FIG. 11 shows a part of another conventional bag manufacturing process.

[Explanation of symbols]

 11 Front Laminate Film 12 Back Laminate Film 13 Opening 14 Side Edge Seal Part 15 Bottom Edge Seal Part 16 (Print) Laminate Film 16a Front (Print) Laminate Film 16b Back (Print) Laminate Film 17 Print Film 18, 18a , 18b Sealing film 21 Printing layer (front side) 22 Printing layer (back side) 25 Sealing laminating film 26 Sealing film 27 Sealing film 28 Equal division line 30 Gravure printing machine 31 Plate cylinder 32 Pressure cylinder 33 Ink 34 ink Tank 35 Dryer 37 Cutter 38 Seal Stand 39 Hot Plate 41 Coating Roll 42 Rubber Roll 43 Adhesive 45 Dryer 46 Heating Roll 47 Cooling Roll 48 Heating Roller 49 Cooling Roller 51a, 51b Guide Body 52a, 52b Guide Body 53 Pinch Lumpur 54 pinch roll 55 roll 56 roll 58 printed laminate film printing laminate film 58b behind 58a Table printing laminate film 59 half folded film 65 feed rolls 66 feed roll P1 surface printing P2 reverse printing

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location B65D 33/00 A

Claims (14)

[Claims] 1. A cutting step of equally dividing a laminate film having a sealing film as a film layer on the innermost layer side in a width direction thereof to form a front laminate film and a back laminate film, and the front and back laminate films. In at least one innermost layer side sealing film of the laminated film, a different layer forming step of heat sealing the sealing film to form front and back laminated films forming mutually different film layers, respectively, and the front and back 1. A continuous bag-making method for front and back different-layer bags, which comprises a heat-sealing step in which the innermost sealing films of the laminated film are polymerized by facing each other and the polymerized front and back laminated films are heat-sealed. 2. A bending step of bending a laminate film having a sealing film as a film layer on the innermost layer side to form a front laminate film and a back laminate film, and one of the front and back laminate films. In the innermost layer side sealing film, a different layer forming step of forming a front and back laminate film respectively forming different film layers by heat-sealing the sealing film, and the innermost layer of the front and back laminate film A continuous bag-making method for front and back different-layer bags, comprising a heat-sealing step in which sealable films are opposed to each other and polymerized, and the polymerized front and back laminated films are heat-sealed. 3. The continuous bag-making method for front and back different layer bags according to claim 1, wherein in the heat-sealing step, the polymerized front and back laminated films are heat-sealed on three sides, on the back, or on two sides. 4. The heat-sealing in the different layer forming step is performed on the sealing film layer on the innermost layer side of one of the front and back laminating films so that the entire surface of the sealing film or characters, figures and symbols are represented. Or unevenness is formed by the partial heat sealing.
Or the continuous bag-making method for the front and back different-layer bags described in 2. 5. A double-sided pitch printing bag in which front and back side printing is superposed at corresponding positions one by one and continuously made into a bag, and one side of the film is divided into a width direction and a front side printing is performed. On the other hand, it has a printing layer formed by pitch printing simultaneously with back surface printing at the same pitch, and a printing laminate film formed by laminating a sealing film as a film layer on the innermost layer side to this printing layer, The printing laminate film on the front side and the printing laminate film on the back side, which are respectively formed by equally dividing or bending the printing laminate film in the width direction, to the sealing film on the innermost layer side of one of the front and back printing laminate films. , A front and back laminated film consisting of different film layers formed by laminating a sealing film, and polymerized. Table front and back different layers sided pitch printing bag, characterized in that formed by heat sealing the front and back of the laminate film three sides in each frame of the back of the laminate film. 6. One side of the film is divided into equal parts in the width direction, and one side is printed with characters, figures, symbols, etc., and the other side is
For printing the front and back sides of a printing laminate film, which consists of a printing film that has a printing layer on which the backside printing of characters, figures, symbols, etc. is printed at the same pitch, and a sealing film is laminated as the film layer on the innermost layer side. A step of continuously bag-making one frame at a time, wherein the printing laminate film is equally divided in its width direction to form a front printing laminate film and a back printing laminate film; Different layer forming step of forming front and back laminated films respectively forming a different film layer by laminating the sealable film on the sealable film on the innermost layer side of one of the front and back printing laminated films, Laminates on the front and back sides from the position where the laminate film is divided into equal parts to the feed roll downstream of the next heat sealing process. The sealing film of the innermost layer of the front and back laminating films are faced to each other and polymerized, with the same distance of feeding out the coating film, and the polymerized front and back laminating films are frame by frame in the longitudinal and width directions. A continuous bag-making method of front and back different layer double-sided pitch printing bags, which includes a heat-sealing step of heat-sealing the front and back laminated films. 7. A printing layer in which one surface of a film is equally divided in the width direction and front printing of characters, figures, symbols and the like is printed on one side and back printing of characters, figures and symbols is printed on the other side at the same pitch. A step of continuously bag-making a printing laminate film obtained by laminating a sealing film as a film layer on the innermost layer side to a printing film having Bending in the width direction, a bending step of forming a front printing laminate film and a back printing laminate film, a sealing film on the innermost layer side of one of the front and back printing laminate film, a sealing film A heat-sealing step to form different layers for forming front and back laminated films respectively forming different film layers, and the printing The same distance from the position where the laminated film is bent to the feed roll downstream of the next heat-sealing step is used to feed the laminated film on the front and back sides, and the sealing films of the innermost layers of the laminated film on the front and back sides are opposed to each other. Continuous bag making of double-sided and double-sided pitch printing bags that have been polymerized and heat-sealed to heat seal the laminated film on the front and back for each frame in the longitudinal direction and / or width direction of the laminated film on the front and back Method. 8. A printing layer is formed by simultaneously printing on one side of a film the front side printing on one side and the back side printing on the other side at the same pitch to equally divide the width direction, to form a printing layer, and a sealing film is formed on this film. A printing film laminating step of forming a printing laminating film by laminating as a film layer on the innermost layer side, and dividing or folding the printing laminating film into equal parts in the width direction, and a printing laminating film on the front side and a printing laminating film on the back side. A cutting step or a bending step to form a sealing film on the innermost layer side of one of the front and back printing laminate films, the front and back laminating films forming different film layers by heat-sealing the sealing film. Forming different layers, and dividing or bending the printed laminate film into equal parts. From the peeling position to the feed roll downstream of the next heat-sealing step, the front and back laminating films are fed at the same distance, and the innermost sealing films of the front and back laminating films are polymerized by facing each other. 8. The double-sided pitch printing of different front and back layers, comprising a heat-sealing step of heat-sealing the front and back laminated films for each frame in the longitudinal direction and / or width direction of the polymerized front and back laminated films. Continuous bag making method. 9. A single-layer film having a double-sided sealing property or a laminate film is heat-sealed and laminated on the sealing film on the innermost layer side of one of the front and back printing laminate films. Continuous bag making method for double-sided and double-sided pitch printing bags. 10. The innermost layer side film layers of both the front and back printed laminate films are laminated with different kinds of sealable single layer films or different innermost layer laminate films of different layers. The continuous bag-making method for a double-sided pitch printing bag of different front and back layers according to claim 6 or 7, characterized in that front and back laminate films forming different film layers are formed respectively. 11. The front and back different layer double-sided pitch printing bag according to claim 6, wherein the film forming the printing layer is an opaque film such as paper or aluminum, and the printing layer is formed on the outer surface of the opaque film. Continuous bag making method. 12. The continuous bag-making method for a front and back different layer double-sided pitch printing bag according to claim 1, wherein at least part of the heat-sealing step is performed in a content filling step. 13. The continuous bag-making method for a double-sided pitch printing bag of different front and back layers according to claim 6 or 7, wherein the heat-sealing step is performed in a content filling step. 14. The continuous bag-making of front and back different layer double-sided pitch printing bags according to claim 6 or 7, wherein in the heat-sealing step, the polymerized front and back laminated films are heat-sealed on three sides, on the back, or on two sides. .