Paper flexible package processing equipment and method

Abstract

The invention discloses a paper flexible package processing device and method, belongs to the technical field of packaging, is used for processing a rolled paper material strap, and comprises an unwinding unit, a first corona unit, a second corona unit, a third corona unit and a fourth corona unit which are arranged in sequence, the device comprises a flexographic printing unit, an image-text drying unit, a post-printing processing unit, a second corona unit, a heat-sealing gloss oil printing unit, a heat-sealing gloss oil drying unit, a die cutting unit, a slitting unit and a winding unit. The first corona unit and the second corona unit are used for conducting static electricity removing treatment on the front face, the front face and the back face of a paper material belt correspondingly, the flexible printing unit is used for conducting image-text printing on an image-text printing area on the front face of the paper material belt, and the heat-sealing gloss oil printing unit is used for conducting heat-sealing gloss oil printing on gloss oil printing areas on the front face and the back face of the paper material belt. And the die cutting unit and the slitting unit are used for carrying out die cutting on the paper material belt to form a tearing opening and carrying out slitting treatment. The method is reasonable in design, is suitable for processing paper into a base material of a flexible packaging bag, and accords with an environment-friendly concept.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging, and particularly relates to a paper soft packaging processing device and method. Background Art

[0003] As a disposable essential daily necessity, tissue packaging has a very broad market space. According to data surveys, the total market size of toilet paper has been increasing year by year. The market size in the first quarter of 2019 was 8 billion, and it is expected that the annual market size of toilet paper will reach more than 100 billion by 2025.

[0004] Currently, the main tissue packaging on the market is mainly plastic packaging. With the continuous improvement of people's environmental awareness, the requirements for toilet paper packaging are also getting higher and higher.

[0005] In addition, the "Opinions on Further Strengthening the Governance of Plastic Pollution" jointly issued by the National Development and Reform Commission and the Ministry of Ecology and Environment in 2020 clearly put forward the promotion and application of alternative products for plastic bags. Therefore, whether from the perspective of "carbon peak and carbon neutrality" or from the perspective of "replacing plastics", the reform and innovation of tissue plastic soft packaging is extremely urgent.

[0006] Based on this, it is necessary to use degradable paper materials as the soft packaging for products such as tissues, playing cards, and medicines. However, compared with plastics, paper has its unique properties. Therefore, the soft packaging processing equipment in the prior art cannot directly process paper into soft packaging. Therefore, it is necessary to develop a suitable soft packaging processing equipment. Summary of the Invention

[0007] Aiming at the problem that the existing soft packaging processing equipment and technology cannot directly use paper as a raw material, the purpose of the present invention is to provide a paper soft packaging processing device and method to at least partially solve the above problems.

[0008] To achieve the above object, the technical solution of the present invention is as follows:

[0009] In a first aspect, the present invention provides a paper soft packaging processing device for processing a rolled paper tape, including a unwind unit, a first corona unit, a flexographic printing unit, a graphic drying unit, a post-printing processing unit, a second corona unit, a heat-sealing varnish printing unit, a heat-sealing varnish drying unit, a die-cutting unit, a slitting unit, and a winding unit arranged in sequence; wherein, the first corona unit is used for removing static electricity from the front side of the paper tape, the flexographic printing unit is used for printing graphics on the graphic printing area on the front side of the paper tape, the second corona unit is used for removing static electricity from both the front and back sides of the paper tape, the heat-sealing varnish printing unit is used for printing heat-sealing varnish on the varnish printing areas on both the front and back sides of the paper tape, the die-cutting unit is used for die-cutting tear openings on the paper tape, the slitting unit is used for slitting the paper tape into multiple packaging tapes with appropriate widths, and the number of winding units matches the slitting capacity of the slitting unit.

[0010] In a preferred embodiment, the graphic drying unit is an infrared drying unit, and the heat-sealing varnish drying unit is a drying unit.

[0011] In a preferred embodiment, the printing medium of the heat-sealing varnish printing unit is water-based environmentally friendly heat-sealing varnish, and the heat-sealing varnish printing unit performs heat-sealing varnish printing in a manner of sharing an impression cylinder.

[0012] In a preferred embodiment, it further includes a third corona unit, a silicone oil printing unit, and a silicone oil drying unit arranged in sequence between the die-cutting unit and the heat-sealing varnish printing unit. The third corona unit is used for removing static electricity from the back side of the paper tape, and the silicone oil printing unit is used for printing silicone oil on the silicone oil printing area on the back side of the paper tape.

[0013] In a preferred embodiment, tension and deviation correction adjustment units are provided between the post-printing processing unit and the flexographic printing unit, between the post-printing processing unit and the heat-sealing varnish printing unit, between the heat-sealing varnish printing unit and the silicone oil printing unit, and between the silicone oil printing unit and the die-cutting unit. The tension and deviation correction adjustment units are each configured with sensors for detecting the tension and skew conditions of the paper tape.

[0014] In a preferred embodiment, the printing medium of the silicone oil printing unit is organic silicone oil.

[0015] In a preferred embodiment, in the paper tape forming a single paper soft packaging, the varnish printing area on the back side surrounds the silicone oil printing area on the back side, the graphic printing area on the front side is arranged opposite to the silicone oil printing area on the back side, and the varnish printing area on the front side is arranged opposite to the varnish printing area on the back side.

[0016] In a second aspect, the present invention further provides a method for processing a paper soft package, which is used for processing a rolled paper tape, and the method includes the following steps:

[0017] After the paper tape is unrolled by an unrolling unit, the static electricity on the front surface of the paper tape is first eliminated by a corona unit, thereby improving the adsorption capacity of the front surface of the paper tape;

[0018] Graphics and texts are printed on the front surface of the paper tape by a flexographic printing unit, and then drying treatment is carried out by a graphics and text drying unit;

[0019] After the tension adjustment and deviation correction adjustment of the paper tape, post-printing processing is carried out on the paper tape by a post-printing processing unit;

[0020] After the tension adjustment and deviation correction adjustment of the paper tape are carried out again, hot-sealing varnish printing is carried out on the varnish printing areas on the front and back surfaces of the paper tape by a hot-sealing varnish printing unit, and drying treatment is carried out by a varnish drying unit;

[0021] After the tension adjustment and deviation correction adjustment of the paper tape are carried out again, a die-cut tearing opening is made on the paper tape by a die-cutting unit, then the paper tape is cut by a slitting unit, and finally the cut paper tapes are respectively wound by a plurality of winding units.

[0022] In a preferred embodiment, the method further includes the following steps:

[0023] After the drying treatment of the paper tape is carried out by the varnish drying unit, it further includes that after the tension adjustment and deviation correction adjustment of the paper tape are carried out again, the reverse side of the paper tape is subjected to static electricity removal treatment by a corona unit, then silicone oil printing is carried out on the silicone oil printing area on the reverse side of the paper tape by a silicone oil printing unit, and then drying treatment is carried out by a silicone oil drying unit.

[0024] By adopting the above technical solution, the beneficial effect of the present invention is that: the present invention uses paper as the base material of the soft packaging bag. After unrolling, the surface of the paper is first subjected to static electricity removal treatment by a corona unit, then the surface of the paper is printed by a flexographic printing unit, and after drying, post-printing processing is selectively carried out according to requirements. Then, the front and back surfaces of the paper are subjected to static electricity removal treatment again by a corona unit, and then local hot-sealing varnish printing is carried out on the front and back surfaces of the paper by a hot-sealing varnish printing unit. After drying, die-cut tearing openings, slitting and winding are carried out on the surface of the paper; and when the product to be packaged contains moisture, only before die-cutting, the reverse side of the paper is subjected to corona treatment, local silicone oil coating and drying treatment in sequence. After the formed paper roll is provided to downstream manufacturers, only product filling, packaging bag folding and sealing are required. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the processing equipment for paper soft packaging bags in the first embodiment of the present invention;

[0026] Figure 2 It is a schematic diagram of heat-sealing varnish printing in the first embodiment of the present invention;

[0027] Figure 3 It is a schematic structural diagram of the processing equipment for paper soft packaging bags in the second embodiment of the present invention;

[0028] Figure 4 It is a schematic flow diagram of the processing method for paper soft packaging in the third embodiment of the present invention;

[0029] Figure 5 It is a schematic flow diagram of the processing method for paper soft packaging in the fourth embodiment of the present invention.

[0030] In the figure: 1 - unwind unit, 2 - first corona unit, 3 - flexographic printing unit, 4 - graphic drying unit, 5 - post-printing processing unit, 6 - second corona unit, 7 - heat-sealing varnish printing unit, 8 - heat-sealing varnish drying unit, 9 - die-cutting unit, 10 - slitting unit, 11 - winding unit, 12 - paper guiding roller, 13 - tension and deviation rectification adjustment unit, 14 - sensor, 15 - third corona unit, 16 - silicone oil printing unit, 17 - silicone oil drying unit. Detailed implementation manners

[0031] The following further explains the detailed implementation manners of the present invention with reference to the accompanying drawings. It should be noted here that the description of these implementation manners is for helping to understand the present invention, but does not constitute a limitation to the present invention. In addition, the technical features involved in the various implementation manners of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is the description of the structure of the present invention based on the accompanying drawings, and is only for the convenience of describing the present invention simply, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0033] For the "first" and "second" in this technical solution, they are only the appellation distinctions for the same or similar structures, or the corresponding structures with similar functions, rather than the arrangement of the importance of these structures, nor do they have the meaning of sorting, comparing sizes, or others.

[0034] In addition, unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two structures. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the general idea of the present invention and in connection with the specific context of this solution.

[0035] Embodiment 1

[0036] As Figure 1 As shown, an embodiment of the present invention provides a paper soft packaging processing device for processing a rolled paper tape. The device includes an unwinding unit 1 around which the paper tape is wound. The paper tape sequentially passes through a first corona unit 2, a flexographic printing unit 3, a graphic drying unit 4, a post-printing processing unit 5, a second corona unit 6, a heat-sealing varnish printing unit 7, a heat-sealing varnish drying unit 8, a die-cutting unit 9, and a slitting unit 10, and is then wound by a winding unit 11. It is easy to understand that a plurality of paper guide rollers 12 are arranged between the unwinding unit 1 and the winding unit 11, so that the paper soft packaging processing device provided by the embodiment of the present invention has the characteristic of spatial turning, thereby reducing the floor area of the device. The number and layout positions of the paper guide rollers 12 can be set according to the actual situation on site.

[0037] Among them, the first corona unit 2 is used to remove static electricity from the front side of the paper tape, thereby improving the adsorption capacity of the surface of the paper tape. The front side of the paper tape refers to the outer side of the finally processed and formed soft packaging, that is, the side facing away from the packaged object.

[0038] The flexographic printing unit 3 is used to perform graphic printing on the graphic printing area on one side of the front of the paper tape. Usually, according to the different soft packages, the positions and sizes of the graphic printing areas are also different. During actual processing, the layout position of the flexographic printing unit 3 and the printing plate can be adjusted.

[0039] The graphic drying unit 4 is configured as an infrared drying unit, such as an infrared lamp, which is used to dry the graphics printed on the paper tape.

[0040] The post-printing processing unit 5 includes one or more of a laminating or glazing unit 51 and a hot stamping unit 52. For example, the laminating or glazing unit 51 and the hot stamping unit 52 are evenly arranged on the production line, and can be specifically selected according to the design requirements of the soft package during processing.

[0041] The second corona unit 6 is used to remove static electricity from both the front and back sides of the paper tape, thereby improving the adsorption capacity of the surface of the paper tape. The back side of the paper tape refers to the inner side of the final processed flexible package, that is, the side in contact with the packaged item.

[0042] The hot-seal varnish printing unit 7 is used to perform hot-seal varnish printing on the varnish printing areas on both the front and back sides of the paper tape. The purpose of printing the hot-seal varnish is to facilitate the subsequent process of heat-sealing the folded paper tape. The printing medium of the hot-seal varnish printing unit 7 is water-based environmentally friendly hot-seal varnish, and the hot-seal varnish printing unit 7 uses a shared impression roller method for hot-seal varnish printing.

[0043] It is easy to understand that the varnish printing area does not cover the entire front and back sides of the paper tape. It is only necessary to perform hot-seal varnish printing on the part of the paper tape that will ultimately be used for folding and sealing. For example, Figure 2 as shown, for a tissue soft packaging bag, the four circumferential sides (including the front side of the tissue, the back side of the tissue, and the two side sides of the tissue) are not printed with hot-seal varnish. Moreover, on the outside of the paper-based soft package, the hot-seal varnish printing area is arranged around the graphic printing area. At the same time, the hot-seal varnish printing area on the outside of the paper-based soft package is arranged opposite to the hot-seal varnish printing area on the inside of the paper-based soft package.

[0044] The hot-seal varnish drying unit 8 is a drying unit, such as a drying oven, which is used to dry the hot-seal varnish printed on the paper tape.

[0045] The die-cutting unit 9 is used to die-cut tear openings on the paper tape, and the slitting unit 10 is used to slit the wider paper tape into multiple packaging tapes with appropriate widths. The packaging tapes can be cut in subsequent processes to obtain packaging papers with specified sizes and suitable for packaging items. Among them, the number of winding units 11 matches the slitting capacity of the slitting unit 10, and each winding unit 11 winds one packaging tape respectively.

[0046] Among them, tension and deviation adjustment units 13 are provided between the flexographic printing unit 3 and the post-printing processing unit 5, between the post-printing processing unit 5 and the hot-seal varnish printing unit 7, and between the hot-seal varnish printing unit 7 and the die-cutting unit 9. The tension and deviation adjustment units 13 are all equipped with sensors 14 for detecting the tension and skew conditions of the paper tape.

[0047] In addition, it is easy to understand that tension and deviation adjustment units 13 and sensors 14 are also provided between adjacent two post-printing processing units. That is, after one post-printing process is completed and before another post-printing process is carried out, tension adjustment and deviation adjustment are also required.

[0048] The working process of the paper-based soft package processing equipment provided by the embodiment of the present invention is as follows:

[0049] After the paper tape is unwound by the unwinding unit 1, it first passes through a corona unit to eliminate the static electricity on the front side of the paper tape, thereby improving the adsorption capacity of the front side of the paper tape.

[0050] Then, it passes through the flexographic printing unit to print graphics and texts on the front side of the paper tape, and then passes through the graphic drying unit to dry the printed graphics and texts.

[0051] After the tension adjustment and deviation correction adjustment of the paper tape, the post-press processing unit performs post-press processing on the paper tape, including one or more of laminating or glazing, hot stamping.

[0052] After the tension adjustment and deviation correction adjustment of the paper tape again, the hot-seal varnish printing unit performs hot-seal varnish printing on the varnish printing areas on the front and back sides of the paper tape, and the varnish drying unit dries the areas where the hot-seal varnish is printed.

[0053] After the tension adjustment and deviation correction adjustment of the paper tape again, the die-cutting unit performs die-cutting and tearing on the paper tape, and then the slitting unit slits the paper tape, and finally several winding units wind the slit paper tapes respectively.

[0054] After being processed by the paper-based flexible packaging processing equipment provided by the embodiment of the present invention, the paper tape can be filled with products (such as paper towels or playing cards), folded, and sealed after being cut by downstream manufacturers.

[0055] Embodiment 2

[0056] On the basis of Embodiment 1, as Figure 3 shown, the paper-based flexible packaging processing equipment provided by the present invention further includes a third corona unit 15, a silicone oil printing unit 16, and a silicone oil drying unit 17 that are sequentially arranged between the hot-seal varnish printing unit 7 and the die-cutting unit 9.

[0057] Among them, the third corona unit 15 is used to remove static electricity from the back side of the paper tape, thereby improving the adsorption capacity of the surface of the paper tape.

[0058] The silicone oil printing unit 16 is used to print silicone oil on the silicone oil printing area on the back side of the paper tape. The printing medium of the silicone oil printing unit 16 is organosilicone oil. The silicone oil drying unit 17 is a drying unit, such as a drying oven, which is used to dry the silicone oil printed on the back side of the paper tape.

[0059] With such a setting, after the paper tape is processed into a paper soft packaging bag, the part coated with silicone oil on its inner side can directly contact the product containing moisture. Taking the wet tissue soft packaging as an example, the silicone oil printing areas are the front inner side, the back inner side and the two inner side surfaces of the wet tissue. Usually, the silicone oil printing area on the inner side of the paper soft packaging is arranged opposite to the graphic printing area on the outer side of the paper soft packaging. One is on the outer side of the wet tissue and the other is on the inner side of the wet tissue, that is, the silicone oil printing area on the inner side of the paper soft packaging is surrounded by the hot-seal varnish area on the inner side of the paper soft packaging.

[0060] It is easy to understand that in this embodiment, a tension and deviation rectification adjustment unit 13 is also provided between the hot-seal varnish printing unit 7 and the silicone oil printing unit 16, and between the silicone oil printing unit 16 and the die-cutting unit 9. The tension and deviation rectification adjustment unit 13 is also equipped with sensors 14 for detecting the tension and skew conditions of the paper tape.

[0061] Embodiment Three

[0062] An embodiment of the present invention provides a method for processing a paper soft packaging, which is used to process a roll-shaped paper tape so that it is suitable for being processed into a paper soft packaging bag, as Figure 4 shown. The method includes the following steps:

[0063] Step S1. After the paper tape is unrolled by the unrolling unit, the static electricity on the front side of the paper tape is first eliminated by the corona unit, thereby improving the adsorption capacity of the front side of the paper tape;

[0064] Step S2. The graphics are printed on the front side of the paper tape by the flexographic printing unit, and then dried by the graphic drying unit;

[0065] Step S3. After the tension adjustment and deviation rectification adjustment of the paper tape, the post-press processing unit performs post-press processing on the paper tape, including one or more of laminating or varnishing, hot stamping;

[0066] Step S4. After the tension adjustment and deviation rectification adjustment of the paper tape again, the hot-seal varnish printing unit performs hot-seal varnish printing on the varnish printing areas on the front and back sides of the paper tape, and dries it by the varnish drying unit;

[0067] Step S5. After the tension adjustment and deviation rectification adjustment of the paper tape again, the die-cutting unit performs die-cutting and tearing openings on the paper tape, and then the slitting unit slits the paper tape, and finally several winding units wind the slit paper tapes respectively.

[0068] Embodiment Four

[0069] On the basis of Embodiment Three, as Figure 5As shown in the figure, the paper soft packaging processing method provided by the embodiment of the present invention further includes the following steps:

[0070] Step S45. After adjusting the tension and correcting the deviation of the paper tape again, the reverse side of the paper tape is de-electrostatically treated by the corona unit, and then the silicone oil printing area on the reverse side of the paper tape is printed with silicone oil by the silicone oil printing unit, and then dried by the silicone oil drying unit.

[0071] Among them, step S45 is between step S4 and step S5.

[0072] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions, and variations to these embodiments still fall within the protection scope of the present invention.

Claims

1. A paper soft packaging processing device for processing a roll-shaped paper tape, characterized in that: It includes an unwinding unit, a first corona unit, a flexographic printing unit, a graphic drying unit, a post-printing processing unit, a second corona unit, a heat-sealing varnish printing unit, a heat-sealing varnish drying unit, a die-cutting unit, a slitting unit and a winding unit which are arranged in sequence; wherein, the first corona unit is used for removing static electricity from the front side of the paper material tape, the flexographic printing unit is used for printing graphics and texts on the graphic printing area on the front side of the paper material tape, the second corona unit is used for removing static electricity from the front and back sides of the paper material tape, the heat-sealing varnish printing unit is used for printing heat-sealing varnish on the varnish printing areas on the front and back sides of the paper material tape, the die-cutting unit is used for die-cutting tear openings on the paper material tape, the slitting unit is used for slitting the paper material tape into multiple packaging material tapes with appropriate widths, and the number of winding units matches the slitting capacity of the slitting unit.

2. The soft packaging processing equipment according to claim 1, characterized in that: The graphic drying unit is an infrared drying unit, and the heat-sealing varnish drying unit is a drying unit.

3. The soft packaging processing equipment according to claim 1, characterized in that: The printing medium of the heat-sealing varnish printing unit is water-based environmental protection heat-sealing varnish, and the heat-sealing varnish printing unit uses a common impression cylinder method to print heat-sealing varnish on the front and back sides.

4. The soft packaging processing equipment according to any one of claims 1-3, characterized in that: It also includes a third corona unit, a silicone oil printing unit and a silicone oil drying unit which are arranged in sequence between the die-cutting unit and the heat-sealing varnish printing unit. The third corona unit is used for removing static electricity from the back side of the paper material tape, and the silicone oil printing unit is used for printing silicone oil on the silicone oil printing area on the back side of the paper material tape.

5. The soft packaging processing equipment according to claim 4, wherein: Tension and deviation adjustment units are arranged between the post-printing processing unit and the flexographic printing unit, between the post-printing processing unit and the heat-sealing varnish printing unit, between the heat-sealing varnish printing unit and the silicone oil printing unit, and between the silicone oil printing unit and the die-cutting unit. The tension and deviation adjustment units are all equipped with sensors for detecting the tension and skew conditions of the paper material tape.

6. The soft packaging processing equipment according to claim 4, characterized in that: The printing medium of the silicone oil printing unit is organic silicone oil.

7. The soft packaging processing equipment according to claim 4, characterized in that: In the paper material tape that constitutes a single paper soft package, the varnish printing area on the back side is arranged around the silicone oil printing area on the back side, the graphic printing area is arranged opposite to the silicone oil printing area, and the varnish printing area on the front side is arranged opposite to the varnish printing area on the back side.

8. A processing method for paper soft packaging, which is used to process a roll-shaped paper material tape, characterized in that, The method includes the following steps: After the paper material tape is unwound by the unwinding unit, first, the static electricity on the front side of the paper material tape is removed by the corona unit, so as to improve the adsorption capacity of the front side of the paper material tape; Graphics and texts are printed on the front side of the paper material tape by the flexographic printing unit, and then drying treatment is carried out by the graphic drying unit; After the tension and deviation of the paper material tape are adjusted, post-printing processing is carried out on the paper material tape by the post-printing processing unit; After the tension and deviation of the paper material tape are adjusted again, heat-sealing varnish is printed on the varnish printing areas on the front and back sides of the paper material tape by the heat-sealing varnish printing unit, and drying treatment is carried out by the varnish drying unit; After the tension adjustment and deviation correction adjustment of the paper tape are carried out again, the paper tape is die-cut to form a tear opening by the die-cutting unit, then the paper tape is slit by the slitting unit, and finally the slit paper tapes are respectively wound by a plurality of winding units.

9. The method according to claim 8, characterized in that The method further includes the following steps: After the paper tape is dried by the varnish drying unit, it further includes that after the tension adjustment and deviation correction adjustment of the paper tape are carried out again, the reverse side of the paper tape is subjected to static elimination treatment by the corona unit, then the silicone oil printing area on the reverse side of the paper tape is subjected to silicone oil printing by the silicone oil printing unit, and then drying treatment is carried out by the silicone oil drying unit.

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