Adhesive sticker production device and production process

Abstract

The application discloses a self-adhesive production device and a production process, and relates to the papermaking technical field. The self-adhesive production device comprises a release paper processing system, and the release paper processing system is used for processing the release paper before the release paper is compounded with a face paper or before the release paper is compounded with a face film. The release paper processing system comprises multiple processing units arranged in sequence according to a processing sequence. Each processing unit comprises a first rewetting device and a first smoothing device arranged behind the first rewetting device. Compared with the prior art, the application cooperates the first rewetting device with the first smoothing device, obtains the release paper with uniform and stable water content and a smooth surface, and finally obtains the smooth self-adhesive.

Description

Technical Field

[0001] This invention relates to the field of papermaking technology, and in particular to a self-adhesive label production apparatus and production process. Background Technology

[0002] Self-adhesive labels (or self-adhesive paper) are a special paper material with unique adhesive properties, consisting of a base paper layer, a release agent layer, a self-adhesive layer, and a top layer, arranged sequentially. The top layer can be either a face paper layer or a face film layer. During the production of self-adhesive labels, a release agent is generally first coated onto the base paper to obtain a release paper. This release paper is then subjected to a series of processes: heat curing, roller re-wetting, adhesive application, tray re-wetting, and single-sided steam re-wetting. Finally, it is laminated with the face paper or face film to obtain the self-adhesive label.

[0003] Sampling and inspection revealed that the overall flatness of the self-adhesive labels obtained using the above process was unstable, primarily depending on the thickness and stiffness of the surface layer. Upon peeling back the surface layer, severe curling of the release paper was found; therefore, the unevenness of the release paper is the main cause of the unevenness of the self-adhesive labels.

[0004] Therefore, how to improve the production equipment and process of self-adhesive labels to enhance the flatness of release paper is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a self-adhesive label production apparatus and process to improve the flatness of release paper, thereby improving the flatness of the self-adhesive label.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention discloses a self-adhesive label production apparatus, including a release paper processing system. The release paper processing system is used to process the release paper before it is laminated with the face paper or before it is laminated with the face film. The release paper processing system includes a plurality of processing units arranged in sequence according to the processing order. Each processing unit includes a first rehumidification device and a first leveling device arranged after the first rehumidification device.

[0008] Preferably, the first leveling device includes a first cold cylinder shaping device; at least the last of the first leveling devices further includes a first hot cylinder ironing device, which is located before the first cold cylinder shaping device.

[0009] Preferably, the first rehumidification device includes a swirl plate rehumidification device, a first roller rehumidification device, and a steam rehumidification device arranged sequentially from front to back.

[0010] Preferably, the self-adhesive production apparatus further includes a self-adhesive processing system, which is used to process the self-adhesive after the release paper and the face paper are laminated to obtain self-adhesive, or after the release paper and the face film are laminated to obtain self-adhesive; the self-adhesive processing system includes a second rehumidification device and a second leveling device disposed after the second rehumidification device.

[0011] Preferably, the second rehumidification device includes a second roller-type rehumidification device.

[0012] Preferably, the second leveling device includes a second hot cylinder ironing device and a second cold cylinder shaping device disposed after the second hot cylinder ironing device.

[0013] This invention also discloses a self-adhesive label production process using the aforementioned self-adhesive label production apparatus, including a release paper treatment process. The release paper treatment process is used to treat the release paper before it is laminated with the face paper or before it is laminated with the face film. The release paper treatment process includes multiple processing units arranged sequentially according to the processing order. Each processing unit includes a first rewetting process and a first leveling process arranged after the first rewetting process.

[0014] Preferably, the first leveling process includes a first cold cylinder shaping process; at least the last of the first leveling processes also includes a first hot cylinder ironing process, wherein the first hot cylinder ironing process is located before the first cold cylinder shaping process.

[0015] Preferably, the first rehumidification process includes a spinning rehumidification process, a first roller rehumidification process, and a steam rehumidification process arranged sequentially from front to back.

[0016] Preferably, the self-adhesive production process further includes a self-adhesive treatment process, which is used to process the self-adhesive after the release paper and the face paper are laminated to obtain the self-adhesive, or after the release paper and the face film are laminated to obtain the self-adhesive; according to the processing sequence, the self-adhesive treatment process includes a second roller re-wetting process, a second hot cylinder ironing process, and a second cold cylinder shaping process arranged in sequence.

[0017] Compared with related technologies, the present invention achieves the following technical effects:

[0018] This invention divides the release paper processing system into multiple processing units. Each processing unit includes a first rewetting device and a first leveling device disposed after the first rewetting device. Through the cooperation of the first rewetting device and the first leveling device, release paper with uniform and stable moisture content and a smooth surface is obtained, and finally, a smooth self-adhesive is obtained. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a self-adhesive label production apparatus according to an embodiment of the present invention.

[0021] In the diagram: 1-Unwinding device for base paper; 2-Printing device; 3-Correction device I; 4-Silicone coating device; 5-Oven; 6-Correction device II; 7-Cooling bridge; 8-Correction device III; 9-Restoring device I; 10-Roller restoring device I; 11-Steam restoring device I; 12-Cold cylinder setting device I; 13-Restoring device II; 14-Roller restoring device II; 15-Steam restoring device II; 16-Finishing device I; 17-Correction device IV; 18-Glue coating device; 19-Correction device V; 20-Restoring device III; 21-Steam restoring device III; 22-Cooling and laminating device; 23-Top layer unwinding device; 24-Corona treatment device; 25-Roller restoring device III; 26-Finishing device II; 27-Rewinding device. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The purpose of this invention is to provide a self-adhesive label production apparatus and process to improve the flatness of release paper, thereby improving the flatness of the self-adhesive label.

[0024] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. In this embodiment, the case where the release agent is silicone oil is used as an example for illustration, but the actual embodiments are not limited to this. In this embodiment, self-adhesive (or self-adhesive paper) does not refer to self-adhesive adhesive, but rather to a product using self-adhesive adhesive, comprising a base paper layer, a release agent layer, a self-adhesive adhesive layer, and a top layer arranged sequentially.

[0025] This embodiment provides a self-adhesive label production apparatus, including a release paper processing system. The release paper processing system is used to process the release paper before it is laminated with the face paper or before it is laminated with the face film. The release paper processing system includes multiple processing units arranged sequentially in a processing order. Each processing unit includes a first rehumidification device and a first leveling device disposed after the first rehumidification device.

[0026] The working principle of the self-adhesive label production device in this embodiment is as follows:

[0027] By adopting the above structure, the rewetting process of the release paper is divided into multiple rounds, and a shaping process is carried out after each round of rewetting. This can improve the uniformity of the moisture content of the release paper and the flatness of the release paper.

[0028] As a possible example, in this embodiment, the first leveling device includes a first cold cylinder shaping device; at least the last first leveling device also includes a first hot cylinder ironing device, which is located before the first cold cylinder shaping device.

[0029] The first hot cylinder ironing device uses a hot cylinder to iron the release paper and simultaneously makes minor adjustments to the moisture content of the release paper. The first cold cylinder shaping device uses a cold cylinder to cool the release paper and presses and shapes the release paper softened by water vapor to improve its flatness.

[0030] As a possible example, in this embodiment, the first rehumidification device includes a swirl plate rehumidification device, a first roller rehumidification device, and a steam rehumidification device arranged sequentially from front to back.

[0031] The centrifugal rehydration device directs a certain amount of water onto a high-speed rotating disc, where water droplets are flung onto the back of the release paper under centrifugal force, achieving controllable water replenishment. The first roller rehydration device evens out the moisture on the back of the release paper through roller pressure, while simultaneously using roller pressure to allow a certain amount of moisture to penetrate into the release paper.

[0032] The steam rehumidification device uses water vapor at a certain pressure and temperature to iron both sides of the rehumidified release paper, allowing the moisture remaining on the surface of the release paper to penetrate into the paper fibers, stabilizing the moisture content, and causing the release paper to gradually flatten from a curled state.

[0033] Steam rehumidification devices are typically used in conjunction with steam generators or steam boilers to obtain a stable steam supply.

[0034] As a possible example, in this embodiment, the self-adhesive label production apparatus further includes a self-adhesive label processing system. This system processes the self-adhesive label after it has been laminated with release paper and face paper to obtain self-adhesive label, or after it has been laminated with release paper and face film to obtain self-adhesive label. The self-adhesive label processing system includes a second rehumidification device and a second leveling device disposed after the second rehumidification device.

[0035] The second rewetting device is used to re-wet the back of the release paper, and the second leveling device is used to level the release paper again. After the rewetting and leveling treatment of the self-adhesive paper, the self-adhesive paper can also maintain its flatness.

[0036] As one possible example, in this embodiment, the second rewetting device includes a second roller-type rewetting device. Since the release paper processed by the release paper handling system has already met the flatness requirements, the second rewetting device does not need to perform a complex rewetting process; only slight rewetting is required. Therefore, in this embodiment, the second rewetting device achieves the required level of moisture simply through the rolling rewetting of the second roller-type rewetting device.

[0037] As one possible example, in this embodiment, the second flattening device includes a second hot cylinder ironing device and a second cold cylinder shaping device disposed after the second hot cylinder ironing device. The second hot cylinder ironing device uses a hot cylinder to iron the release paper while making minor adjustments to the moisture content of the release paper. The second cold cylinder shaping device uses a cold cylinder to cool the release paper and presses and shapes the release paper softened by water vapor to improve flatness.

[0038] For example, the first roller rehumidification device and the second roller rehumidification device can be a three-roller rehumidification device, a two-roller rehumidification device, or an anilox roller rehumidification device. The hot cylinder can be a mirror-finished hot cylinder, and the cold cylinder can be a mirror-finished cold cylinder. "Mirror-finished" means that its roughness Ra can be below 0.4μm to improve the flatness of the release paper.

[0039] The self-adhesive labels produced by the self-adhesive label production device in this embodiment, upon sampling and inspection for flatness, were found to be generally flat and stable. After separating the release paper from the face paper, or from the face film, the release paper was found to be flat without curling. Therefore, the self-adhesive label production device in this embodiment can flatten both the release paper and the self-adhesive labels.

[0040] Figure 1 This illustration shows a specific example of the self-adhesive label production apparatus of this embodiment, demonstrating not only the release paper processing system and the self-adhesive label processing system described above, but also other structures to fully present the entire self-adhesive label processing process. It is understood that these other structures are flexibly adjustable. The following description follows the process sequence from beginning to end. Figure 1 The various parts of the structure.

[0041] I. Processing of the base paper

[0042] The bottom paper unwinding device 1 releases the bottom paper;

[0043] Printing device 2 prints certain text or patterns on the base paper;

[0044] Correction device I3 corrects the deviation of the bottom paper;

[0045] The silicone coating device 4 applies silicone oil to the front side of the base paper;

[0046] The silicone-coated base paper is heated and cured in oven 5 to obtain release paper;

[0047] Correction device II corrects the alignment of 6 pairs of release paper;

[0048] Cooling bridge 7 conveys the release paper, allowing it to cool down naturally;

[0049] Correction device Ⅲ corrects the alignment of release paper;

[0050] The re-wetting device I9 replenishes water to the back of the release paper;

[0051] The roller re-humidification device I10 uses roller pressure to even out the moisture on the back of the release paper and allows a certain amount of moisture to penetrate into the release paper.

[0052] The steam rehumidification device I11 allows surface moisture to continue to penetrate into the interior of the release paper (both sides);

[0053] The cold cylinder shaping device Ⅰ12 uses a cold cylinder to cool down the release paper and presses and shapes the release paper that has been softened by water vapor.

[0054] The re-humidification device II13 replenishes water on the back of the release paper;

[0055] The roller re-humidification device II14 uses roller pressure to even out the moisture on the back of the release paper and allows a certain amount of moisture to penetrate into the release paper.

[0056] The steam rehumidification device II15 allows surface moisture to continue to penetrate into the release paper (both sides);

[0057] The finishing device I16 includes a front-mounted cold cylinder shaping device II and a rear-mounted hot cylinder ironing device I. The cold cylinder shaping device II cools the release paper and presses and shapes the release paper softened by steam heating. The hot cylinder ironing device I uses a hot cylinder to iron the release paper and simultaneously makes minor adjustments to the moisture content of the release paper. In this way, the release paper after finishing treatment achieves a stable and accurate moisture content and obtains stable and ideal flatness.

[0058] Correction device IV17 corrects the alignment of the release paper;

[0059] The adhesive applicator 18 coats the silicone oil-coated side of the release paper with a self-adhesive adhesive.

[0060] The alignment device V19 aligns the adhesive-coated release paper.

[0061] The desiccant rehumidification device Ⅲ20 replenishes water on the back of the release paper after adhesive coating;

[0062] The steam rehumidification device Ⅲ21 allows moisture from the back of the release paper to continue penetrating into the interior of the release paper (single-sided).

[0063] II. Processing of face masks or face sheets

[0064] The surface unwinding device 23 releases the face mask or face paper;

[0065] When the surface unwinding device 23 releases the face film, the corona device 24 enhances the adhesion of the face film; when the surface unwinding device 23 releases the face paper, the corona device 24 does not work.

[0066] III. Processing of self-adhesive labels

[0067] The cooling laminating device 22 laminates the release paper with the face film, or the release paper with the face paper, to obtain self-adhesive;

[0068] The roller re-wetting device Ⅲ25 replenishes water to the back of the release paper again;

[0069] The finishing device 26 performs a second smoothing process on the release paper; the finishing device 26 includes a cold cylinder shaping device 3 located at the front and a hot cylinder ironing device 2 located at the rear.

[0070] The winding device 27 winds up the self-adhesive labels.

[0071] The release paper processing system comprises two processing units. For the first processing unit, its first rewetting device consists of a spinning rewetting device I9, a roller rewetting device I10, and a steam rewetting device I11; its first leveling device consists of a cold cylinder setting device I12. For the second processing unit, its first rewetting device consists of a spinning rewetting device II13, a roller rewetting device II14, and a steam rewetting device II15; its first leveling device consists of a finishing device I16.

[0072] For the self-adhesive processing system, its second rewetting device consists of roller rewetting device Ⅲ25, and its second leveling device consists of finishing device Ⅱ26.

[0073] This embodiment also provides a self-adhesive label production process using the aforementioned self-adhesive label production apparatus, including a release paper processing process. The release paper processing process is used to treat the release paper before it is laminated with the face paper or before it is laminated with the face film. The release paper processing process includes multiple processing units arranged sequentially in a processing order. Each processing unit includes a first rewetting process and a first leveling process disposed after the first rewetting process.

[0074] As a possible example, in this embodiment, the first leveling process includes a first cold cylinder shaping process; at least the last first leveling process also includes a first hot cylinder ironing process, which is located before the first cold cylinder shaping process.

[0075] As a possible example, in this embodiment, the first rehumidification process includes a spinning rehumidification process, a first roller rehumidification process, and a steam rehumidification process arranged sequentially from front to back.

[0076] As a possible example, in this embodiment, the self-adhesive label production process further includes a self-adhesive label processing process. This process is used to treat the self-adhesive label after it has been laminated with release paper and face paper, or after it has been laminated with a face film. According to the processing sequence, the self-adhesive label processing process includes a second roller rewetting process, a second hot cylinder ironing process, and a second cold cylinder setting process, arranged sequentially.

[0077] Since this production process uses the aforementioned self-adhesive label production equipment, it also possesses the advantages of self-adhesive label production equipment, which will not be elaborated here.

[0078] To make the comparison between the production process of this embodiment and the prior art clearer, the steps of the two processes are compared in a table below. It should be noted that only a portion of the steps are listed in the table.

[0079] Table 1. Comparison of Some Processes

[0080] bottom paper roll bottom paper roll Apply silicone oil Apply silicone oil Heat curing Heat curing Cooling bridge Swing plate back to moisture Roller rehumidification Roller rehumidification Steam rehumidification (double-sided) Cold cylinder flat Swing plate back to moisture Roller rehumidification Steam rehumidification (double-sided) Finishing (hot cylinder, cold cylinder) Glue Glue Swing plate back to moisture Swing plate back to moisture Steam rehumidification (single-sided) Steam rehumidification (single-sided) Cooling composite Cooling composite Roller rehumidification Decoration Collect Collect

[0081] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A self-adhesive label production apparatus, characterized in that, The system includes a release paper processing system for processing release paper before it is laminated with face paper or with face film; the release paper processing system includes multiple processing units arranged in sequence according to the processing order; each processing unit includes a first rehumidification device and a first leveling device disposed after the first rehumidification device; The first leveling device includes a first cold cylinder shaping device; the first leveling device of at least the last processing unit further includes a first hot cylinder ironing device, which is located before the first cold cylinder shaping device. The first rehumidification device includes a swivel rehumidification device, a first roller rehumidification device, and a steam rehumidification device arranged sequentially from front to back; The deflector rehumidification device throws water droplets onto the back of the release paper; the first roller rehumidification device evens out the moisture on the back of the release paper by roller pressing, and at the same time, the pressure of the roller makes the moisture penetrate into the release paper; the steam rehumidification device irons both sides of the rehumidified release paper, so that the moisture remaining on the surface of the release paper penetrates into the paper fibers. The self-adhesive production apparatus further includes a self-adhesive processing system, which is used to process the self-adhesive after the release paper and the face paper are laminated to obtain self-adhesive, or after the release paper and the face film are laminated to obtain self-adhesive; the self-adhesive processing system includes a second rehumidification device and a second leveling device disposed after the second rehumidification device.

2. The self-adhesive label production apparatus according to claim 1, characterized in that: The second rehumidification device includes a second roller-type rehumidification device.

3. The self-adhesive label production apparatus according to claim 1, characterized in that: The second leveling device includes a second hot cylinder ironing device and a second cold cylinder shaping device disposed after the second hot cylinder ironing device.

4. A self-adhesive label production process, using the self-adhesive label production apparatus as described in any one of claims 1 to 3, characterized in that: The system includes a release paper processing process, which is used to treat the release paper before it is laminated with the face paper or the face film. The release paper processing process includes multiple processing units arranged in sequence according to the processing order. Each processing unit includes a first rewetting process and a first leveling process arranged after the first rewetting process. The first leveling process includes a first cold cylinder shaping process; the first leveling process of at least the last processing unit further includes a first hot cylinder ironing process, which is located before the first cold cylinder shaping process. The first rehumidification process includes, from front to back, a swirl rehumidification process, a first roller rehumidification process, and a steam rehumidification process; It also includes a self-adhesive processing technology, which is used to process the self-adhesive after the release paper and the face paper are laminated to obtain self-adhesive, or after the release paper and the face film are laminated to obtain self-adhesive; according to the processing sequence, the self-adhesive processing technology includes a second roller re-wetting process, a second hot cylinder ironing process, and a second cold cylinder shaping process arranged in sequence.

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