JP5506225B2 - How to recycle advertising sheets - Google Patents

Description

The present invention relates to a method for recycling an advertisement sheet used indoors or outdoors and a method for manufacturing a recycled sheet.

  Currently, various advertising bodies are posted to introduce products, campaigns, and announcements indoors and outdoors. Many of these advertising bodies are in the form of a sheet using a resin sheet or fabric as a base material. Regular advertisements have a relatively short life span, and the same advertisement is posted for several days for events such as exhibitions, weeks for new product campaigns such as music and clothing, etc. If the event is for several months, corporate image, etc., it is about one year. The vast amount of removed advertising sheets is currently disposed of by incineration or landfill.

  For the recycling of textile products, some polyester products have been remelted into chips, and the technology to make fibers, films, and molded products again is materialized, but a sufficient impurity removal process is required or materials There are problems such as being limited.

  As a cleaning device, a cleaning liquid ejector is provided on one side of the traveling fabric, a cleaning liquid suction device is provided on the opposite side, and the cleaning liquid penetrates in the thickness direction of the fabric (see Patent Document 1). There is an apparatus (see Patent Document 2) that gives jet showers from a plurality of injection nozzles to the fabric introduced into the tank, but it is insufficient to drop off the color pattern applied to the fabric, An advertisement sheet once posted as an advertisement has not been collected and reused as a sheet with a colored pattern again.

JP 2002-59103 A JP 2003-155654 A

  As described above, an effective method for reusing a used advertising sheet has not been found, and by applying a process of dropping the applied color pattern to a resin sheet or fabric to which a colored pattern is applied as an advertising sheet. It is requested to use again.

  An object of the present invention is to provide a method of recycling an advertising sheet and a method of manufacturing a recycled sheet that can remove the attached color pattern and dirt attached during the posting period and can be reused as an advertising sheet. is there.

The method for recycling an advertising sheet according to the present invention is a method in which a color pattern is dropped from the advertising sheet by spraying water in the form of a water curtain on the advertising sheet to which the colored pattern is given, and the sheet from which the colored pattern has been dropped is removed from the advertising sheet. It is characterized by being used again . Further, the method for imparting the color pattern is an ink jet method. Furthermore, the amount of water jetting is 2.0 to 10.0 L / min per jet nozzle. Furthermore, the injection pressure of water injection is 3 to 15 MPa. Further, the water curtain-like water jet is set so that the angle with respect to the surface of the advertisement sheet is in the range of 85 to 95 degrees. Furthermore, a process for producing an advertising sheet by giving a color pattern to the sheet, a process for posting the advertising sheet as an advertising body outdoors or indoors, a process for collecting the advertising sheet after the posting period ends, and a water curtain for the collected advertising sheet It is characterized by having a step of dropping the color pattern from the advertising sheet by spraying water in a shape and a step of manufacturing the advertising sheet by giving the color pattern again to the sheet from which the color pattern has been dropped .

  According to the present invention, it is possible to clean an advertising sheet without using a drug that has a large effect on the human body and the environment by spraying water on the advertising sheet in the form of a water curtain. The color pattern of the advertisement sheet after the posting period and the dirt attached during the posting period can be removed, and the color pattern can be given again and used as the advertisement sheet.

It is a schematic block diagram regarding the apparatus which performs water injection in the form of the water curtain of embodiment which concerns on this invention. It is the schematic which looked at the injection part from the direction orthogonal to the axial direction of a support roll. It is a partially expanded perspective view regarding a support roll and an injection part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the said subject solution means is not limited to the structure described below, Various structures can be employ | adopted in the same technical idea.

  In the recycling method of the present invention, the color pattern is dropped from the advertising sheet by spraying water on the advertising sheet with the colored pattern in a water curtain shape, and the sheet is reused.

Water curtain-shaped water injection performed on an advertising sheet with a colored pattern is arranged with two or more injection nozzles, in which water is injected in a fan shape from each injection nozzle, and the jets and ends of adjacent injection nozzles are This can be done by overlapping.
The water curtain-like water jet is performed using, for example, an apparatus as shown in FIG. The cleaning device 1 for cleaning a fabric that is a sheet includes a carry-in unit 10 that transports the carried fabric F, three cleaning units 11 to 13, and a carry-out unit 14. The cloth F to be carried in is expanded in the width direction by the spreading roll 30 and is carried into the cleaning device 1 by the transport roller group 31. Further, the fabric F carried out from the cleaning device 1 is transported to the next step by the transport roller group 40.

  The carry-in unit 10 conveys the fabric F at a predetermined conveyance speed by the drive roll 10 a and carries it into the cleaning unit 11. The fabric F is supported in a state in which one surface side thereof is in close contact with the peripheral surface, which is the support surface of the support roll 11a, without a gap. Washing by spraying water in the form of a water curtain from the other surface side while the entire surface side is in close contact with the support surface suppresses the vibration of the fabric caused by the spraying action, and the kinetic energy of the spray liquid is efficient. Will contribute to the cleaning effect.

The support roll 11a is rotationally driven at the same peripheral speed as the transport speed of the fabric F, and the fabric F stably carries out continuous transport in a state of being in close contact with the peripheral surface of the support roll 11a. be able to.
The support roll 11a preferably has a smooth surface with a hard peripheral surface. For example, the support roll 11a is made of metal and the surface of which is smooth. And the unevenness | corrugation, a hole, etc. are not formed in the surrounding surface of the support roll 11a, but it is set so that a space | gap may not be formed in the state closely_contact | adhered with the fabric F. FIG. The fabric F can be continuously washed while being conveyed by the support roll 11a, and the washing treatment can be performed efficiently.

  The cleaning unit 11 includes an injection unit 21 below the support roll 11a, and the injection unit 21 includes a plurality of injection nozzles 21a that inject cleaning liquid upward on the upper surface of the main body 21b. FIG. 2 is a schematic view of the injection unit 21 as seen from a direction orthogonal to the axial direction of the support roll 11a. FIG. 3 is a partially enlarged perspective view of the support roll 11a and the injection unit 21.

  Inside the main body 21b, a supply pipe (not shown) is disposed over the entire length, and each injection nozzle 21a is attached to a plurality of branch pipes connected to the supply pipe. Then, when the supply pipe is connected to a cleaning liquid supply device (not shown) and the cleaning liquid is pumped to the supply pipe, the cleaning liquid is ejected from the injection nozzles 21a all at once.

  The plurality of injection nozzles 21a are arranged at equal intervals over the entire length along the axial direction of the support roll 11a. As shown by the dotted line in FIG. 2, the cleaning liquid sprayed from the spray nozzle 21a is sprayed at a predetermined spray angle so as to spread in a fan shape in the axial direction of the support roll 11a, and the nozzle diameter in the direction orthogonal to the axial direction. It is sprayed flat with a predetermined width that expands slightly.

  Therefore, the spray region where the cleaning liquid sprayed from the spray nozzle 21a hits the surface of the support roll 11a is formed in an elongated strip shape having a predetermined length along the axial direction of the support roll 11a. And since the injection area | region of the adjacent injection nozzle 21a is set so that the edge part of the axial direction of the support roll 11a may overlap, the washing | cleaning area | region R which consists of the whole injection area | region of all the injection nozzles 21a is a support roll. 11a is set in a strip shape having a predetermined width in the circumferential direction and extending over the entire width along the axial direction of 11a. In the cleaning region R set in this way, the entire one surface side of the fabric F is in close contact with the support surface of the support roll 11a.

  The form of the jets ejected from each of the jet nozzles 21a is fan-shaped and flat as described above, and the jets of the adjacent jet nozzles and the ends overlap each other. It is formed in a water curtain shape along the axial direction of the support roll 11a. In the portion where the jets overlap, the jets intersect each other but are jetted toward the support roll 11a, so that they are not greatly reduced, and the jetting pressure applied to the surface of the support roll 11a is almost uniform over the entire cleaning region R. Become. As a result, generation of soot due to injection can be prevented, and deterioration of the cleaning effect due to generation of soot can be suppressed.

  In order to form such a water curtain-like jet W, for example, the injection angle of each injection nozzle 21a is set to 20 to 40 degrees, the arrangement interval is set to 40 to 60 mm, and the interval to the support roll 11a is set to 80 to 150 mm. It is good to set to.

What is necessary is just to set the injection pressure from the injection nozzle 21a according to the kind of sheet | seat to wash | clean, and the grade of stain | pollution | contamination, for example, it is preferable to set to the range of 3.0-15.0 MPa. If it is less than 3.0 MPa, the color pattern tends to drop off, and if it exceeds 15.0 MPa, the sheet may be damaged.
The amount of ejection from the ejection nozzle 21a is preferably 2.0 to 10.0 L / min. If it is less than 2.0 L / min, the water curtain becomes thin and it becomes difficult to ensure sufficient cleaning power. If sufficient cleaning power is to be secured, the width of the curtain that can be formed with one nozzle will be narrowed, increasing the number of nozzles. It tends to be inferior in cost and apparatus maintainability. If it exceeds 10.0 L / min, the weight of the water curtain increases, the load is applied to the sheet, and it becomes easy to break, or the conveyance becomes unstable.

When the water temperature forming the water curtain is 60 to 90 ° C., it is preferable that the color pattern and dirt are easily swelled and dissolved in water, so that the water curtain is more easily removed from the sheet.
Moreover, the angle of the injection direction on the support surface is preferably set to 85 degrees to 95 degrees.
In this way, the water curtain-like jet W is jetted from the jet section in a direction substantially perpendicular to the support surface, and jets almost uniformly over the entire width of the fabric F supported in close contact with the support surface. Pressure is applied and the fabric F does not wrinkle. Further, since no gap is formed between the fabric F and the support surface, the fabric does not vibrate due to the jetting pressure, and the kinetic energy of the jetted cleaning liquid is washed without being reduced by the vibration of the fabric. Will contribute to the action. In addition, since the cleaning liquid used for the cleaning process of the fabric F falls down as it is, the cleaned dirt or the like hardly remains in the fabric F, and the dirt or the like can be surely washed off. Therefore, in the cleaning region R of the support surface, the cleaning process of the fabric F can be performed efficiently, and an effective cleaning process can be performed in a short time when the continuously conveyed fabric F passes.

  The fabric F cleaned in the cleaning unit 11 is subjected to the same cleaning process in the cleaning units 12 and 13. The cleaning unit 12 includes a support roll 12a, guide rolls 12b and 12c, tension rollers 12d and 12e, and an injection unit 22. The cleaning unit 13 includes a support roll 13a, guide rolls 13b and 13c, and tension rollers 13d and 13e. In addition, as in the cleaning unit 11, the fabric F that is in close contact with the support roll is cleaned by a water curtain-like jet.

  By spraying water in the form of a water curtain with the above-described cleaning device, the color pattern can be removed and the sheet reproduced as a recording substrate can be provided with a color pattern and used again as an advertising sheet.

  As the sheet used in the present invention, a resin film or tarpaulin can be used in addition to the above-described fabric. Examples of the material of the fabric include polyester, nylon, acrylic, acetate, and cotton. When advertising sheets are posted outdoors, tarpaulins and polyester fabrics are preferred because durability is particularly required.

  For advertising sheets manufactured by dyeing polyester fabric, the dye that has entered the polyester fiber is lifted from the inside of the fiber to the fiber surface by the treatment liquid and temperature conditions, and then the uniform water curtain is used. The color pattern can be removed efficiently by washing away.

Furthermore, the color pattern can be easily removed by immersing the advertising sheet in a treatment liquid containing a nonionic surfactant having an HLB of 8 to 20 and an alkali agent before water jetting and then performing a heat treatment. If the HLB of the nonionic surfactant is less than 8, the affinity for water is extremely lowered, and it is likely to remain in the structure of the polyester fabric even after water injection, which may cause a failure during reuse. Become. On the other hand, when the HLB exceeds 20, the affinity with the color material is lowered and the effect of dropping the color pattern is reduced.
Examples of the nonionic activator to be used include polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene polyoxypropylene glycol and the like, and polyoxyethylene alkyl ether and polyoxyethylene alkylphenyl ether are particularly preferable.

The pH of the treatment liquid is preferably in the range of 7.0 to 13.5, and can be used without fear of corrosion to metals or the like and weight loss of the polyester fabric. The treatment liquid preferably contains other water-soluble paste such as sodium alginate, CMC, and poval. Furthermore, when a porous inorganic material such as silica or diatomaceous earth is blended, the color drop-off property is further improved.
The heat treatment after applying the treatment liquid is preferably performed at 150 to 190 ° C. for 5 to 20 minutes. This is because the color material that has entered the polyester fabric has a high effect of dropping off and is less likely to cause a decrease in strength of the polyester fabric.

As a method for imparting a color pattern to a sheet, screen printing, an ink jet method, or the like can be performed. However, an ink jet method that can efficiently impart the minimum necessary color material or resin is economical, and is later. This is effective in removing the color pattern in the process. That is, since the color pattern can be configured with a minimum amount of color material and resin, the color pattern can be easily removed from the sheet.
A known color material is used as a color material used for imparting a color pattern. Among them, a water-insoluble or poorly water-soluble color material excellent in light resistance and water resistance is preferable, specifically, an organic pigment or an inorganic color material. Examples include pigments, disperse dyes and solvent dyes.

  When a color material is applied by an ink jet method, the color material is dispersed or dissolved in water, a solvent, or a resin and used as an ink. When water-based ink is used, it is preferable to provide an ink receptor on the sheet in advance, so that ink bleeding can be prevented and a clear color pattern can be obtained. Further, when using an ink in which a disperse dye or a solvent dye is dispersed in water, it is preferable to dye the polyester fabric. After the water-soluble ink receptor is applied to the polyester fabric, the ink is applied, and then the ink is applied. By performing teaming and washing, a dyed polyester fabric can be obtained and used as an advertising sheet.

  The manufactured advertising sheets will be placed inside and outside the building for the required period of time, such as by fitting them into banners or metal frames as needed. At the end of the posting period, the advertising sheets are collected, the brackets attached to the advertising sheets are removed at the time of construction, and the advertising sheets made by sewing several sheets together are separated one by one.

(Embodiment 1)
The example dye | stained using the polyester fabric as a sheet | seat is demonstrated.
In addition, when selecting a polyester fabric as a base material, it is preferable to use a fabric having a tensile strength of 30 kgf / 50 mm width or more. This is because the durability is high and the number of reuses can be increased.

(Process for producing an advertising sheet by giving a color pattern to the sheet)
Production of Advertising Sheet A Polyester fabric (tensile strength 50 kgf / 50 mm width), DKS Fine Gum HEL-1 (Daiichi Kogyo Seiyaku Co., Ltd., etherified carboxymethylcellulose) 2%, MS Liquid (Meisei Chemical Co., Ltd.) Made of nitrobenzene sulfonate, anti-reducing agent, active ingredient 30%) and 93% water, and then applied by dip nip method so that the solid content is 2 g / m ² and applied at 170 ° C. The ink-receiving layer was formed by drying for a minute, and an aqueous color ink using a disperse dye shown below as a coloring material was applied by an inkjet method.
Blue ink: C.I. I. Disperse Blue 73
Red ink: C.I. I. Disperse Red 92
Yellow ink: C.I. I. Disperse Yellow 114
The ink jet conditions are as follows.
Printing device: On-demand serial scanning inkjet device Resolution: 360 dpi
Unit area ink application amount: 15 g / m ²
After ink was applied by inkjet, the fabric was wet-heated at 175 ° C. for 10 minutes using an HT steamer, 2 g / L of Tripol TK (Daiichi Kogyo Seiyaku Co., Ltd., nonionic surfactant), 2 g of soda ash Washed by treating at 50 ° C. for 10 minutes in a soaping bath containing / L. Then, it processed for 10 minutes at 50 degreeC in the fix bath containing 2 g / L of Sun Life E-48 (The Nikka Chemical Co., Ltd. make, anionic fix agent), and dried, and the advertising sheet A was obtained.

(Process of posting an advertising sheet as an advertising body outdoors or indoors)
The manufactured advertisement sheet was posted on the outer wall surface of the building so that the advertisement information printing surface was the front side.

(The process of collecting advertising sheets after the posting period ends)
After a posting period of two months after posting, the posted advertisement sheet was removed and collected.

(Process of dropping the color pattern from the advertising sheet by spraying water on the collected advertising sheet in the form of a water curtain)
Process 1 Pre-cleaning treatment of advertisement sheet A Tripol TK (Daiichi Kogyo Seiyaku Co., Ltd., nonionic surfactant) 5 g / L, potassium carbonate 10 g / L, DKS Fine Gum HEL-1 (Daiichi Kogyo Seiyaku) Soaked in a treatment solution having a pH of 11.0 containing 2 g / L of etherified carboxymethyl cellulose (manufactured by Co., Ltd.) and 10 g / L of Mizukacil P740 (manufactured by Mizusawa Chemical, silica), and dip so that the solid content is 20 g / m ^2. After application by the nip method, heat treatment was performed at 170 ° C. for 10 minutes.

Process 2 Cleaning of Advertising Sheet A In the sheet cleaning apparatus of FIG. 1, the ejection amount of the ejection nozzles 21a, 22a, 23a at an ejection pressure of 5 MPa is 6.0 L / min, the ejection angle is 30 degrees, and the arrangement interval of the ejection nozzles is 50 mm. The intervals to the support rolls 11a, 12a, and 13a were each set to 120 mm, and the angle in the injection direction on the support surface was set to 90 degrees. By performing washing with the water curtain three times in total, the color material adhering to the sheet was removed, and a recycled sheet A was obtained.

  As a result of performing again the process of giving a color pattern to a sheet and manufacturing an advertising sheet using the obtained recycled sheet, an advertising sheet was obtained.

(Embodiment 2)
An example using tarpaulin as a sheet will be described.

(Process for producing an advertising sheet by giving a color pattern to the sheet)
Production of Advertising Sheet B A solvent-based ink using a pigment as a color material was printed on tarpaulin (polyvinyl chloride sheet, thickness 0.1 mm) using an ink jet printer to obtain an advertising sheet B. The ink jet conditions were the same as in the first embodiment.

(Process of posting an advertising sheet as an advertising body outdoors or indoors)
The manufactured advertisement sheet was posted on the outer wall surface of the building so that the advertisement information printing surface was the front side.

(The process of collecting advertising sheets after the posting period ends)
After a posting period of two months after posting, the posted advertisement sheet was removed and collected.

(Process of dropping the color pattern from the advertising sheet by spraying water on the collected advertising sheet in the form of a water curtain)
Cleaning process of advertisement sheet B In the sheet cleaning apparatus of FIG. 1, the ejection amount of the ejection nozzles 21a, 22a, and 23a at an ejection pressure of 5 MPa is 6.0 L / min, the ejection angle is 30 degrees, and the arrangement interval of the ejection nozzles is 50 mm. The intervals to the rolls 11a, 12a, and 13a were each set to 120 mm, and the angle in the injection direction on the support surface was set to 90 degrees.
After the water curtain is formed at an injection pressure of 5 MPa, the advertising sheet B is put into a cleaning device and cleaning is performed with the water curtain three times in total, so that the color material adhering to the sheet is removed, and the recycled sheet B Got.

  As a result of performing again the process of giving a color pattern to a sheet and manufacturing an advertising sheet using the obtained recycled sheet, an advertising sheet was obtained.

(Embodiment 3)
An example of using a polyester fabric as a sheet and coloring with a pigment will be described.

(Process for producing an advertising sheet by giving a color pattern to the sheet)
Production of Advertising Sheet C Polyester fabric (tensile strength 50 kgf / 50 mm width) with Mizukasil P740 (Mizusawa Chemical, silica) 10%, Pascor JK-831N (Maisei Chemical Industries, urethane resin emulsion) 30%, Sumires resin 1001 ( Sumika Chemtex Co., Ltd. (cationic resin) 5% and water 55% mixed with 5g / m ² of knife coating method, treated at 140 ° C for 1 minute to form an ink receiving layer, and pigment as coloring material The water-based ink was printed using an inkjet printer to obtain an advertising sheet C. The ink jet conditions were the same as in the first embodiment.

(Process of posting an advertising sheet as an advertising body outdoors or indoors)
The manufactured advertisement sheet was posted on the outer wall surface of the building so that the advertisement information printing surface was the front side.

(The process of collecting advertising sheets after the posting period ends)
Although the advertising period varies depending on the advertising properties, this time, after the posting period of two months as an average period, the posted advertising sheets were removed and collected.

(Process of dropping the color pattern from the advertising sheet by spraying water on the collected advertising sheet in the form of a water curtain)
Cleaning process of advertisement sheet C In the sheet cleaning apparatus of FIG. 1, the ejection amount of the ejection nozzles 21a, 22a, and 23a at an ejection pressure of 5 MPa is 6.0 L / min, the ejection angle is 30 degrees, and the arrangement interval of the ejection nozzles is 50 mm. The intervals to the rolls 11a, 12a, and 13a were each set to 120 mm, and the angle in the injection direction on the support surface was set to 90 degrees.
After forming the water curtain at an injection pressure of 5 MPa, the advertising sheet C is put into a cleaning device and cleaning is performed with the water curtain three times in total, so that the color material adhering to the sheet is removed, and the recycled sheet C Got.

  As a result of performing again the process of giving a color pattern to a sheet and manufacturing an advertising sheet using the obtained recycled sheet, an advertising sheet was obtained.

  From the above-described method, an advertising sheet or an ink receptor having a color pattern formed by directly adhering a coloring material to a sheet with a resin binder is provided on the sheet, and the coloring material is applied to the ink receptor. It is possible to remove the color pattern by peeling off the resin binder and the ink receptor using the force of water pressure.

DESCRIPTION OF SYMBOLS 1 Cleaning apparatus 11 Cleaning part 11a Support roll 21 Injection part 21a Injection nozzle 12 Cleaning part 12a Support roll 22 Injection part 22a Injection nozzle 13 Cleaning part 13a Support roll 23 Injection part 23a Injection nozzle F Fabric R Cleaning area W Jet

Claims (6)

An advertising sheet characterized in that the colored pattern is dropped from the advertising sheet by spraying water in the form of a water curtain on the colored advertising sheet, and the sheet from which the colored pattern has been dropped is reused as the advertising sheet. Recycling method.   The method for recycling an advertising sheet according to claim 1, wherein a method for imparting a color pattern is an ink jet method.   The method for recycling an advertising sheet according to claim 1 or 2, wherein the amount of water jetting is 2.0 to 10.0 L / min per jet nozzle.   The method for recycling an advertising sheet according to any one of claims 1 to 3, wherein an injection pressure of water injection is 3 to 15 MPa.   5. The advertising sheet recycling method according to claim 1, wherein the water curtain-shaped water jet is set so that an angle with respect to the surface of the advertising sheet is in a range of 85 to 95 degrees. The process of producing an advertising sheet by giving a color pattern to the sheet, the process of posting the advertising sheet as an advertising body outdoors or indoors, the process of collecting the advertising sheet after the posting period ends, and the collected advertising sheet in a water curtain shape A method for recycling an advertising sheet comprising: a step of dropping a color pattern from an advertising sheet by performing water jetting; and a step of re-applying a color pattern to the sheet from which the color pattern has been dropped to manufacture an advertising sheet. .

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