JP2011011788A - Packing film, and method and device for manufacturing the film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing film which secures flexibility in only side edges of a packing bag having a transparent film and a decorative film adhered to the transparent film in two pieces through an adhesive layer and the transparent film, improves a heat conductivity in heat joining of the side edges, allows one to twist an opening end of the bag and easily seal temporarily with a C-shaped fastener once the bag is opened, as well as to provide a method and a device for manufacturing such a film.SOLUTION: A packing film 1 for the packing bag allows one to twist the opening end of the bag and to easily seal temporarily with a C-shaped fastener 2 once the bag is opened. The film 1 is constituted with a transparent film 3 and a decorative film 4 adhered together through the adhesive layer, and when the lateral side edges of the packing film 1 are joined to form a cylindrical shape, only the decorative film 4 is removed from the joined portion 6.

Description

  The present invention is a packaging film that can be used when foods such as confectionery and bread are automatically packaged by a food manufacturer. In particular, after opening, the opening end side is squeezed and temporarily sealed with a C-shaped stopper. The present invention relates to a packaging film for a packaging bag to be stopped, a manufacturing method thereof, and a manufacturing apparatus thereof.

  Conventionally, as a packaging bag for packaging foods such as confectionery and bread, a packaging bag with a high-class feeling printed by pasting different materials such as paper partially on a transparent film has been proposed. The back pasting part that combines the left and right edges of the cut packaging film is heat welded, and the lower end opening is heat welded to form a bag, and the confectionery, bread, etc. in the bag thus formed The upper end opening was heat sealed and sealed.

  For example, the packaging bags shown in Patent Documents 1 and 2 have been proposed in which a band-shaped print display film is bonded to the surface of a transparent film.

Japanese Patent No. 2637634 Utility Model Registration No. 2556844

  On the other hand, foods with a large quantity such as bread and large foods such as French bread are opened once, and then the opened end side is squeezed with a C-shaped stopper to re-seal the food left over by the consumer. Packaging bags that can be temporarily sealed are in circulation. When temporarily sealing using such a stopper, it is necessary to set the thickness of the packaging base material to 30 μm or less because it is necessary to squeeze the opening end side and gather it. Since it is necessary to heat-bond the edges to reduce the rigidity as much as possible, a packaging bag in which direct printing or the like is usually performed on the surface of a single transparent film is generally used.

  In the packaging bags of Patent Documents 1 and 2, since the opening end portion side is not squeezed and temporarily sealed with a C-shaped stopper after opening, the left and right end portions of the packaging film are bonded to form a tubular shape. A transparent film and a film for print display are also superimposed on the back pasting portion when the material is made. Since four films are overlapped only by this back sticking part, rigidity increased and it was difficult to squeeze the opening end part side and temporarily seal it with a C-shaped stopper. Further, in the thermal welding of the back pasting portion, the laminated film has poor thermal conductivity as compared with the single film, so that it is necessary to increase the thermal welding temperature or lengthen the thermal welding time.

  This invention solves the said subject, The place made into the objective makes the back sticking part of the packaging bag with which the transparent film and the decorating film were adhere | attached through the contact bonding layer as only two sheets of a transparent film. A packaging film that secures flexibility and improves thermal conductivity at the time of thermal welding, and can be easily sealed with a C-shaped stopper by squeezing the opening end side after opening, and its manufacturing method, and its We intend to provide manufacturing equipment.

  In order to achieve the above object, a packaging film according to the present invention is a packaging film for a packaging bag that is squeezed at the opened end side after opening and temporarily sealed with a C-shaped stopper, and is a transparent film. And only the decorative film is removed at the back-pasted part when the left and right end portions of the packaging film bonded to each other through the adhesive layer are made into a cylindrical shape. Features.

  Moreover, the manufacturing method of the packaging film which concerns on this invention is a manufacturing method of the said packaging film, Comprising: The contact bonding layer area | region which has an contact bonding layer between the said transparent film and the said decoration film, The said back pasting part Corresponding to the bonding step of providing a non-adhesive layer region without an adhesive layer between the transparent film and the decorative film, and bonding the transparent film and the decorative film, after the bonding step, And a decorative film excision step of excising the non-adhesive layer region portion of the decorative film corresponding to the back pasting portion.

  Moreover, the manufacturing apparatus of the packaging film which concerns on this invention is an apparatus which manufactures the said film for packaging, Comprising: The transparent film conveyance means which conveys the said transparent film, The decoration film conveyance means which conveys the said decoration film And an adhesive layer region having an adhesive layer on the back side of the decorative film conveyed by the decorative film conveying means, and a non-adhesive layer region having no adhesive layer corresponding to the back pasting portion Then, the adhesive is applied by the adhesive application means for applying the adhesive, the adhesive application means, the decorative film conveyed by the decorative film conveyance means, and the transparent film conveyance means. Pressure adhering means for sandwiching and adhering the transparent film, adhesion layer region of the decorative film adhered by pressing and adhering by the pressure adhering means, and the non-adhesion A decorative film cutting means for cutting only the decorative film along the boundary with the region, and a cut-out portion winding for winding up the non-adhesive layer region portion of the decorative film cut by the decorative film cutting means Means.

  According to the present invention, only the transparent film and the decorative film are removed from the back-pasted part of the packaging bag to which the transparent film and the decorative film are bonded via the adhesive layer. As well as ensuring flexibility, the thermal conductivity is improved and the sealing property is good. After opening, the opening end side is squeezed to facilitate temporary sealing with a C-shaped stopper.

It is plane explanatory drawing and cross-sectional explanatory drawing which show the structure of the film for packaging before removing the decorating film of a back sticking part. It is plane explanatory drawing and cross-sectional explanatory drawing which show the structure of the film for packaging after removing the decorating film of a back sticking part. It is a schematic diagram which shows the structure of the manufacturing process and manufacturing apparatus of the film for packaging which concern on this invention. It is a schematic diagram which shows the structure of the manufacturing process and manufacturing apparatus of the film for packaging which concern on this invention. It is a schematic diagram which shows the apparatus structure in which the decorative film cutting | disconnection means, the cutting part winding means, and the film cutting means for packaging were provided integrally. It is a figure which shows the structure of a decoration film cutting | disconnection means. (A) is the top view and sectional drawing which show the packaging film before sticking a back pasting part, (b) is the top view and sectional view which shows the packaging film which stuck the back pasting part and was made into the cylinder shape. It is a perspective view which shows a mode that the packaging bag manufactured with the packaging film which concerns on this invention was squeezed the opening edge part side after opening, and was temporarily sealed with the C-shaped stopper.

  An embodiment of a packaging film according to the present invention, a manufacturing method thereof, and a manufacturing apparatus thereof will be specifically described with reference to the drawings. 1 to 8, reference numeral 1 denotes a packaging film for a packaging bag that is temporarily sealed by a C-shaped stopper 2 by narrowing the opening end side after opening.

  The packaging film 1 is formed into a cylindrical shape by bonding the left and right end portions of the packaging film 1 to which the transparent film 3 and the decorative film 4 to which decorative printing has been applied are bonded via the adhesive layer 5. Only the decorative film 4 is removed from the back pasting portion 6. As the transparent film 3, a transparent synthetic resin film such as OPP (stretched polypropylene), CPP (unstretched polypropylene), or polyethylene can be suitably used, and the decorative film 4 is a rayon (dissolved in cellulose to form a colloid solution and solidifies from the pores). Recycled fibers obtained by drawing in a liquid), paper, non-woven fabric and the like are preferable.

  As shown in FIG. 1, the manufacturing method of the packaging film 1 includes an adhesive layer region 7 having an adhesive layer 5 between the transparent film 3 and the decorative film 4, and the transparent film 3 corresponding to the back pasting portion 6. A non-adhesive layer region 8 that does not have the adhesive layer 5 is provided between the transparent film 3 and the decorative film 4 by the pressure bonding part 31 as shown in FIG. After the bonding step, a decorative film cutting step of cutting the cut portion 4a of the non-adhesive layer region 8 which is the non-adhesive layer region portion of the decorative film 4 corresponding to the back pasting portion 6 by the decorative film cutting unit 33 Have.

  FIG. 3 is a schematic diagram showing the configuration of the manufacturing apparatus 21 for the packaging film 1. Reference numeral 22 denotes a transparent film transport device serving as a transparent film transport means for transporting the transparent film 3, and includes a plurality of transport roller pairs, a drive device, and the like. Reference numeral 27 denotes a decorative film transporting device serving as a decorative film transporting means for transporting the decorative film 4, and is composed of a plurality of transporting roller pairs and driving devices.

  The decorative film 4 wound in a roll shape is fed out from the decorative film feeding unit 23 and is conveyed by a decorative film conveying device 27 serving as a decorative film conveying unit to be an adhesive applying unit serving as an adhesive applying unit. It is conveyed to 28. In the adhesive application part 28, it corresponds to the adhesive layer area | region 7 which has the adhesive layer 5, and the back sticking part 6 on the back surface side of the decorative film 4 conveyed by the decorative film conveying apparatus 27, as shown in FIG. Then, the adhesive is applied separately from the non-adhesive layer region 8 that does not have the adhesive layer 5.

  The decorative film 4 on which the adhesive is applied on the back side by the adhesive application unit 28 serving as the adhesive application unit is sent to the first drying unit 29 serving as the first drying unit by the decorative film transport device 27. The adhesive is dried. In the 1st drying part 29, warm air is sprayed on the decorating film 4, and an adhesive agent is dried.

  The decorative film 4 applied with an adhesive by the adhesive application unit 28 and further dried by the first drying unit 29 is conveyed to the pressure bonding unit 31 which is conveyed by the decorative film conveying device 27 and serves as a pressure bonding means. It is done. On the other hand, the transparent film 3 wound into a roll is fed out from the transparent film feeding unit 30 and sent to the pressure bonding unit 31 by the transparent film transporting device 22 serving as a transparent film transporting unit.

  The pressure bonding unit 31 includes a roller pair of a pressure roller 31a and a fixing roller 31b. The decorative film 4 conveyed by the decorative film conveying device 27 in the pressure bonding unit 31 and the transparent film conveyance The transparent film 3 transported by the device 22 is nipped and pressed at the nip portion between the pressure roller 31a and the fixing roller 31b and bonded.

  The packaging film 1 in which the transparent film 3 and the decorative film 4 are bonded by being pressed by the pressure bonding unit 31 is temporarily taken up by the packaging film transport device 32 serving as a packaging film transport unit. It is conveyed to the 1st packaging film winding part 37, and is wound up by this 1st packaging film winding part 37, and is made into a roll shape.

  The packaging film 1 wound in the form of a roll on the first packaging film winding unit 37 is removed from the first packaging film winding unit 37 and is transferred to the first packaging film feeding unit 39. It is set and fed out from the first packaging film feeding section 39 and, as shown in FIG. 4 (a), is conveyed to the printing section 24 as printing means by the packaging film conveying apparatus 32, and the printing section 24 , The product name, manufacturer name, desired design image, etc. of the article 11 to be packaged on the surface side of the decorative film 4 are printed. The packaging film transport device 32 includes a plurality of transport roller pairs, a driving device, and the like.

  The packaging film 1 printed on the front side is sent to the second drying section 25 serving as a drying means by the packaging film transport device 32, and the printed image is dried. The dried packaging film 1 is conveyed to a second packaging film winding unit 38 as a winding means by a packaging film conveyance device 32, and is wound and rolled by the second packaging film winding unit 38. It is made into a shape.

  The packaging film 1 wound in the form of a roll on the second packaging film take-up unit 38 is removed from the second packaging film take-up unit 38 and is transferred to the second packaging film feeding unit 51. It is set, fed out from the second packaging film feeding section 51, and conveyed to the decorative film cutting section 33 serving as a decorative film cutting means by the packaging film conveying apparatus 32. In the decorative film cutting part 33, only the decorative film 4 is cut along the boundary 9 between the adhesive layer region 7 and the non-adhesive layer region 8 of the decorative film 4 which is sandwiched and pressed by the pressure bonding part 31 and bonded. To do.

  As shown in FIG. 6 (a), the decorative film cutting part 33 has a cutting roller 41 formed with a cutting blade 41a projecting over the entire circumference, and faces the cutting roller 41 and has PET (polyethylene) on the surface. Only the decorative film 4 of the packaging film 1 conveyed to the clamping part 43 with the pressure contact roller 42 provided with the resin sheet layer 42a such as a terephthalate (polyester) film is cut by the cutting blade 41a. In the present embodiment, as shown in FIG. 6B, the height of the cutting blade 41 a that becomes the cutting depth d is configured to be about 0.33 mm to 0.42 mm from the circumferential surface of the cutting roller 41.

  The resin sheet layer 42a is not damaged even when the cutting blade 41a comes into contact with it, and can support the back surface of the packaging film 1 facing the cutting blade 41a. The distance between the cutting roller 41 and the pressing roller 42 in the clamping portion 43 can be adjusted as appropriate by a height adjusting mechanism (not shown), whereby the cutting depth d of the cutting blade 41a is adjusted as appropriate. As shown in FIG. 6B, the cutting blade 41 a is formed in a cross-sectional mountain shape, and only the decorative film 4 is aligned along the boundary 9 between the adhesive layer region 7 and the non-adhesive layer region 8 of the decorative film 4. Disconnect.

  1, 2, and 4 is an example in which three rows of packaging films 1 are manufactured in parallel in the width direction (left and right direction in FIGS. 1 and 2). As shown in (b), the decorative film 4 is provided by a cutting roller 41 provided with four cutting blades 41a corresponding to the portions corresponding to the back pasting portions 6 of the two decorative films 4 at the center. Only the decorative film 4 is cut along the boundary 9 between the adhesive layer region 7 and the non-adhesive layer region 8. Moreover, since the both ends of the width direction of the transparent film 3 also become a site | part corresponding to the back pasting part 6, the part only of the transparent film 3 which does not adhere | attach the decorating film 4 previously is provided in this position.

  In this embodiment, the case where three rows of packaging films 1 are manufactured in parallel in the width direction (left and right directions in FIGS. 1 and 2) will be described. However, one row or other plural rows of packaging films are described. Even when 1 is manufactured in parallel, a predetermined number of cutting blades 41a can be provided corresponding to the portion corresponding to the back pasting portion 6 as appropriate.

  On the downstream side of the decorative film cutting portion 33 shown in FIGS. 3 and 4 (b), a cut-out portion winding portion 34 serving as the cut-out portion winding means shown in FIGS. 3 and 4 (c) is provided. The excision part 4a of the non-adhesive layer region 8 of the decorative film 4 cut by the decorative film cutting part 33 is taken up by the excision part winding device by the excision part transporting device 26 as the excision part transporting means. It is transported to the section 34, wound up by the cut-out section winding section 34, and collected in the form of a roll. Reference numeral 35 shown in FIG. 4C denotes a pressing roller for peeling the cut portion 4 a from the packaging film 1. The excision transport device 26 is composed of a plurality of transport roller pairs, a drive device, and the like.

  The cutting film 4a corresponding to the back pasting part 6 is cut by the decorative film cutting part 33, and the packaging film 1 taken up and removed by the cutting part winding part 34 is removed by the packaging film conveying device 32. It is conveyed to the packaging film cutting part 36 used as a cutting means. In the packaging film cutting part 36, as shown in FIG.4 (d), FIG. 2 which removed the cutting | disconnection site | part 4a corresponding to each back pasting part 6 of the two decorative films 4 of the center part shown in FIG. The substantially central part of the back pasting part 6 of the transparent film 3 shown in FIG. 3 is cut and divided into three along the longitudinal direction. In the packaging film cutting part 36 as well, as shown in FIG. 6A, a cutting roller 44 and two pressing rollers 42 provided with two cutting blades 44a set to a predetermined cutting depth capable of cutting the transparent film 3 are provided. Can be configured. The packaging film 1 cut into three parts along the longitudinal direction by the packaging film cutting unit 36 is transferred to third packaging film winding units 52a, 52b, and 52c serving as winding means by the packaging film transport device 32. Each is conveyed and wound by the third packaging film winding portions 52a, 52b, and 52c to form a roll-shaped product.

  For example, as shown in FIG. 5, the second packaging film feeding section 51, the decorative film cutting section 33, the cutting section winding section 34, the packaging film cutting section 36, and the third packaging film winding section. 52a, 52b, 52c can be configured as a unit A provided integrally, and the packaging films 1 cut into three parts along the longitudinal direction by the packaging film cutting part 36 are alternately arranged up and down. It can wind up by the 3rd packaging film winding-up parts 52a, 52b, and 52c which were made.

  In a food company, the packaging film 1 shown in FIG. 7A delivered as a roll-shaped product is cut into packaging films 1 for each bag as shown in FIG. 4E. And as shown in FIG.7 (b), while adhering the right-and-left side edge which consists only of the transparent film 3 corresponding to the back pasting part 6 of the packaging film 1 cut | judged to the predetermined dimension, it adhere | attaches a lower end opening part. Then, in the bag thus formed, as shown in FIG. 4 (f), articles 11 such as confectionery and bread are placed and packaged, and the upper end opening is sealed. As shown in FIG. 8A, the upper end side is squeezed and sealed with a C-shaped stopper 2.

  The upper end portion of the packaging bag made of the packaging film 1 can be inserted into the groove of the C-shaped stopper 2 by pulling the both sides with a pair of drive rollers. Since the decorative film 4 is removed from the back pasting portion 6 and only the thin transparent soft film 3 is used, the stopper 2 can be easily attached by squeezing the upper end portion of the packaging bag.

  In addition, as shown in FIG. 8 (b), the consumer who purchased the product can easily use the C-shaped stopper 2 by squeezing the unsealed end portion in order to seal the leftover after opening the packaging bag. Temporary sealing is possible.

  According to the said structure, by removing only the decorating film 4 of the back pasting part 6 of the packaging bag with which the transparent film 3 and the decorating film 4 were adhere | attached via the contact bonding layer 5, this back pasting part 6 was removed. Two sheets of transparent film 3 ensure flexibility and good thermal conductivity to improve sealing, and after opening, the opening end side is squeezed to allow easy sealing with C-shaped stopper 2 .

  As an application example of the present invention, it can be applied to a packaging film that can be used when foods such as confectionery and bread are automatically packaged by a food manufacturer, and in particular, a C-shaped stopper by squeezing the opening end side after opening It can apply to the packaging film for packaging bags temporarily sealed by the above, its manufacturing method, and its manufacturing apparatus.

A ... Device d ... Cutting depth 1 ... Packaging film 2 ... Stopper 3 ... Transparent film 4 ... Decorative film 4a ... Cut site 5 ... Adhesive layer 6 ... Back sticking part 7 ... Adhesive layer region 8 ... Non-adhesive layer region 9… Boundary
11… Goods
21 ... Manufacturing equipment
22 ... Transparent film transport device (transparent film transport means)
23… Decorative film feeding department
24 ... Printing section (printing means)
25 ... 2nd drying part (drying means)
26… Removal part transport device (removal part transport means)
27… Decorative film conveying device (decorative film conveying means)
28 ... Adhesive application part (adhesive application means)
29 ... 1st drying part (drying means)
30… Transparent film feeding section
31… Pressure bonding part (Pressure bonding means)
31a: Pressure roller
31b Fusing roller
32 ... Packaging film transport device (wrapping film transport means)
33… Decorative film cutting part (decorative film cutting means)
34… Removal part winding part (Resection part winding means)
35… Pressing roller
36… packaging film cutting part (wrapping film cutting means)
37 ... 1st film winding part for packaging (winding means)
38 ... 2nd packaging film winding part (winding means)
39 ... 1st packaging film feed section
41… Cutting roller
41a ... Cutting blade
42… Pressing roller
42a ... Resin sheet layer
43… clamping part
44… Cut roller
44a ... Cutting blade
51 ... Second packaging film feeding section
52a, 52b, 52c ... 3rd packaging film winding part (winding means)

Claims (3)

A packaging film for a packaging bag that is squeezed after opening and is temporarily sealed with a C-shaped stopper,
Only the decorative film is removed at the back-pasted portion when the transparent film and the decorative film are bonded to each other through the adhesive layer and the left and right end portions of the packaging film are bonded to form a cylinder. A packaging film characterized by the above. It is a manufacturing method of the packaging film of Claim 1, Comprising:
An adhesive layer region having an adhesive layer between the transparent film and the decorative film, and a non-adhesive layer region having no adhesive layer between the transparent film and the decorative film corresponding to the back pasting portion And bonding step for bonding the transparent film and the decorative film,
After the bonding step, a decorative film excision step of excising the non-adhesive layer region portion of the decorative film corresponding to the back pasting portion,
A method for producing a packaging film, comprising: An apparatus for producing the packaging film according to claim 1,
A transparent film conveying means for conveying the transparent film;
Decorative film conveying means for conveying the decorative film;
On the back side of the decorative film conveyed by the decorative film conveying means, an adhesive layer region having an adhesive layer and a non-adhesive layer region not having an adhesive layer corresponding to the back pasting part are classified. An adhesive application means for applying the adhesive;
Pressurizing to apply the adhesive by the adhesive application means and sandwich and pressurize the decorative film conveyed by the decorative film conveying means and the transparent film conveyed by the transparent film conveying means Bonding means;
A decorative film cutting means for cutting only the decorative film along a boundary between the adhesive layer region of the decorative film bonded and pressed by the pressure adhesive means; and the non-adhesive layer region;
A cut-off portion winding means for winding up the non-adhesive layer region of the decorative film cut by the decorative film cutting means;
An apparatus for producing a packaging film, comprising:

Images