CN114472480A - Recycling method of reusable bag - Google Patents
Recycling method of reusable bag Download PDFInfo
- Publication number
- CN114472480A CN114472480A CN202110268603.XA CN202110268603A CN114472480A CN 114472480 A CN114472480 A CN 114472480A CN 202110268603 A CN202110268603 A CN 202110268603A CN 114472480 A CN114472480 A CN 114472480A
- Authority
- CN
- China
- Prior art keywords
- bag
- film
- ink layer
- separation
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 70
- 238000004064 recycling Methods 0.000 title claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 214
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 177
- 239000010410 layer Substances 0.000 claims abstract description 140
- 238000007639 printing Methods 0.000 claims abstract description 101
- 239000012790 adhesive layer Substances 0.000 claims abstract description 37
- 230000008929 regeneration Effects 0.000 claims abstract description 16
- 238000011069 regeneration method Methods 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims description 97
- 230000005484 gravity Effects 0.000 claims description 52
- 239000000463 material Substances 0.000 claims description 41
- -1 polypropylene Polymers 0.000 claims description 38
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 28
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 28
- 239000004743 Polypropylene Substances 0.000 claims description 17
- 229920001155 polypropylene Polymers 0.000 claims description 17
- 230000007246 mechanism Effects 0.000 claims description 16
- 238000002360 preparation method Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 13
- 238000007646 gravure printing Methods 0.000 claims description 11
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 11
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 9
- 239000004698 Polyethylene Substances 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 5
- 238000009958 sewing Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 239000012459 cleaning agent Substances 0.000 claims description 3
- 238000005304 joining Methods 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229920002959 polymer blend Polymers 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 23
- 230000001172 regenerating effect Effects 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 149
- 239000000976 ink Substances 0.000 description 115
- 238000003851 corona treatment Methods 0.000 description 14
- 229920002799 BoPET Polymers 0.000 description 12
- 239000003431 cross linking reagent Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 238000009832 plasma treatment Methods 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000004043 dyeing Methods 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 125000002339 acetoacetyl group Chemical group O=C([*])C([H])([H])C(=O)C([H])([H])[H] 0.000 description 4
- 239000002313 adhesive film Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- WASQWSOJHCZDFK-UHFFFAOYSA-N diketene Chemical compound C=C1CC(=O)O1 WASQWSOJHCZDFK-UHFFFAOYSA-N 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 229920002978 Vinylon Polymers 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 125000003172 aldehyde group Chemical class 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 150000002736 metal compounds Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920006284 nylon film Polymers 0.000 description 2
- 238000007645 offset printing Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000012463 white pigment Substances 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004593 Epoxy Chemical class 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000012461 cellulose resin Substances 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002781 deodorant agent Substances 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 208000028659 discharge Diseases 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 125000001033 ether group Chemical group 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007647 flexography Methods 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 150000002429 hydrazines Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 238000007644 letterpress printing Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 238000001612 separation test Methods 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
- B29D22/003—Containers for packaging, storing or transporting, e.g. bottles, jars, cans, barrels, tanks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
- Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
- Wrappers (AREA)
Abstract
The invention provides a recycling method, which uses a bag made of non-woven fabric with a printing ink layer, wherein the non-woven fabric can be used for removing the printing ink layer easily and at low cost, and the non-woven fabric as a regeneration raw material is not colored by the removed printing ink layer. The recycling method can implement the following steps of using, manufacturing, distributing, using, recycling and regenerating the bags: a reusable bag made of nonwoven fabric, wherein a film having a printing ink layer is adhered to the surface of the bag via an adhesive layer having warm water solubility so that the printing ink layer faces the adhesive layer side, and the surface of the film on the adhesive layer side is a corona-treated surface, a plasma-treated surface or a flame-treated surface.
Description
Area of technical field
The present invention relates to a method for recycling reusable bags made of nonwoven fabric, and more particularly, to a method for recycling reusable bags made of nonwoven fabric, in which a film having a printed ink layer is provided on the surface of the bag and the separation and removal of the film are relatively easy, and which aims to improve the recovery rate and the commercialization rate of the bag made of nonwoven fabric.
Background
In recent years, in order to protect the environment, protect resources, and increase awareness of global environment, a reusable shopping bag made of nonwoven fabric has been used in place of a shopping bag made of a polyolefin film used in a cash register of a supermarket or the like (see patent document 1). The shopping bag made of nonwoven fabric can contribute to reduction of the number of shopping bags by repeated use, and can effectively protect resources by recycling the shopping bag after use and recycling the shopping bag as nonwoven fabric.
Shopping bags made of nonwoven fabrics are used in various shops, and for identification purposes, shopping bags made of nonwoven fabrics are used in which shop characters, logos, advertisement advertisements, and the like are printed on colorless or dyed nonwoven fabrics. In order to easily recycle the shopping bag made of nonwoven fabric after printing, for example, a nonwoven fabric bag has been proposed as follows: there is a screen-printed ink layer which is screen-printed with an aqueous flexographic ink to which polyvinyl alcohol is added and which can be removed with warm alkaline water containing a detergent (see patent document 2).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2009-172283
Patent document 2: japanese patent laid-open publication No. 2012-201747
Disclosure of Invention
Patent document 2 describes the following: the recovered non-woven fabric bag is soaked in warm alkaline aqueous solution containing detergent to remove the printing ink layer and the non-woven fabric is cleaned, so that the non-woven fabric bag can be reused as a regeneration raw material of the non-woven fabric. However, since a part of the removed printing ink layer is dissolved or dispersed in a warm alkaline aqueous solution, and adheres to and colors the nonwoven fabric, a step of decoloring or dyeing is required in addition to cleaning in order to use the recovered nonwoven fabric as a recycled material, which is troublesome and costly.
In addition, since shopping bags made of nonwoven fabrics are sometimes discarded as garbage without being recycled after use, it is desired to increase the recovery rate of shopping bags made of nonwoven fabrics.
In terms of cost, in order to distribute shopping bags made of nonwoven fabric, which are more expensive than shopping bags (shopping bags), free of charge, it is necessary to charge the shopping bags from stores or to convert them into commodities to be charged to customers, and it is desired to introduce a recycling method at low cost.
The purpose of the recycling method of the present invention is to provide a recycling method that can easily separate a film having a printing ink layer, and can obtain a recycled material of a nonwoven fabric that does not require a decoloring or dyeing step, since the nonwoven fabric as the recycled material is not colored by the separated printing ink layer.
Further, a recycling method according to the present invention is a recycling method for recycling a waste liquid, comprising: the recycling rate and the re-commercialization rate can be improved, and a reusable bag made of nonwoven fabric which can reduce the cost burden of customers and stores is used.
The present inventors have conducted intensive studies to solve the above problems, and as a result, have found that a nonwoven fabric is not colored or dyed without separating a printing ink layer from a film having the printing ink layer in a separation step, and a recycling method from the production to the collection and the regeneration is established, thereby completing the present invention. That is, the present invention includes the following embodiments.
(1) A method for recycling reusable bags, comprising a preparation step, a bonding step, a dispensing step, a recovery step, a separation step, and a bag regeneration step,
in the preparing step, a film having a printing ink layer on which shop information or advertisement information is drawn and a bag made of a non-woven fabric are prepared;
in the bonding step, the film is bonded to the bag so that the printing ink layer is close to the surface of the bag and the adhesive layer having warm water solubility is located between the film and the bag, thereby forming a bag with a film;
In the distribution step, the film-attached bag is exchanged to a customer or distributed by paid sales at a retail business;
in the recycling step, used film bags repeatedly used by customers are recycled from the customers at a retail business place;
the separation process comprises:
a supply step of providing a mechanism for dispersing the collected used bags with the film in a state where the input area, the separation area, and the extraction area are filled with warm water or alkaline water in a separation facility having a structure in which the input area, the separation area, and the extraction area are connected in order, and supplying the used bags with the film to the input area,
a separation step of providing a mechanism for immersing the used film-attached bag continuously transferred from the input area to the separation area in warm water or alkaline water in the separation area, and separating the used film-attached bag into a bag made of a nonwoven fabric, a film having a printing ink layer, and a printed ink layer by dissolving the used film-attached bag in the warm water or alkaline water through an adhesive layer having warm water solubility, and
a taking-out step of providing a mechanism for taking out the nonwoven fabric bag and the printed ink layer film continuously transferred from the separation area to the taking-out area from the separation apparatus in each taking-out area, and taking out the nonwoven fabric bag and the printed ink layer film from the separation apparatus in each taking-out area;
In the bag recycling process, the bag made of the non-woven fabric taken out is dried and processed into a reusable non-woven fabric bag, or the bag made of the non-woven fabric taken out is crushed, loosened, and a raw non-woven fabric material is mixed or laminated with the obtained non-woven fabric material, and then a reusable non-woven fabric bag is produced again based on the raw material obtained by mixing or laminating,
then, the reusable nonwoven fabric bag after the regeneration is reused as a nonwoven fabric bag in the preparation step.
(2) The recycling method according to (1), further comprising a membrane recycling step, the membrane recycling step comprising: removing the printing ink layer from the film having the printing ink layer taken out in the separation step; a stage of forming a printing ink layer on the surface of the film after removing the printing ink layer, and processing the film into a new film with the printing ink layer; and a step of applying the new film as a film having a printing ink layer in the preparation step.
(3) In the recycling method according to (1) or (2), the ink layer of the film having a printing ink layer prepared in the preparation step is a flexographic printing ink layer or a gravure printing ink layer, and the surface of the film on the side having the ink layer is a treated surface selected from a corona-treated surface, a plasma-treated surface, and a flame-treated surface.
(4) The recycling method according to any one of (1) to (3), wherein the means for dispersing the collected used film-attached bags is provided with means for dispersing the used film-attached bags in the input area by wind or vibration.
(5) The recycling method according to any one of (1) to (4), wherein the means for immersing in the hot water or the alkaline water for a predetermined time in the separation zone of the separation step is the following means when the separation means is a tank: a rising-prevention plate is provided under the surface of the warm water or alkaline water in the separation region, and a flow of the warm water or alkaline water is formed from the input region to the extraction region via the separation region, and the warm water or alkaline water is transferred under the rising-prevention plate by a film bag along with the flow; in the case where the separation apparatus is a column, the following are the mechanisms: the used membrane bags are allowed to stay below the surface of the warm or alkaline water in the tower for a prescribed time.
(6) In the recycling method according to any one of (1) to (5), the mechanism for taking out the nonwoven fabric-made bag and the printed ink layer-having film separated in the separation region to the outside of the separation apparatus in each take-out region is as follows: the specific gravity of the bag made of the non-woven fabric and the specific gravity of the film with the printing ink layer are set to be higher than that of warm water or alkaline water and lower than that of the warm water or the alkaline water,
The one having a smaller specific gravity than the warm water or the alkaline water floats up, and the one is taken out of the separation device in a take-out area near the water surface of the separation device,
the other party having a specific gravity larger than that of the warm water or the alkaline water is taken out of the separation facility in a take-out area near the bottom of the water by sinking the other party.
(7) The recycling method according to any one of (1) to (6), wherein the bag made of a nonwoven fabric with a film bag is a polypropylene nonwoven fabric or a polyethylene nonwoven fabric having a weight smaller than that of warm water or alkaline water, and the film with a film bag is a polyethylene terephthalate film having a weight larger than that of warm water or alkaline water.
(8) In the recycling method according to any one of (1) to (7), the adhesive layer is a layer which is formed using polyvinyl alcohol, denatured polyvinyl alcohol, or a polymer blend containing a mixture thereof, and has a solubility of less than 20g with respect to 100g of water at 20 ℃ and 60g or more with respect to 100g of water at 60 ℃.
(9) In the recycling method according to any one of (1) to (8), when the bag made of the nonwoven fabric requires a handle, the bag is produced by using the nonwoven fabric of the same material and joining the bag materials of the bag to each other by heat sealing or ultrasonic sealing, and when the bag is processed by sewing, the bag is produced by using the thread of the same material as the nonwoven fabric or the thread having high hot water solubility.
(10) The recycling method according to any one of (1) to (9), wherein a cleaning agent is mixed into warm water or alkaline water used in the separation equipment in the separation step, thereby cleaning a bag made of a nonwoven fabric in the separation step.
(11) The recycling method according to any one of (1) to (10), wherein the separation device is a separation device having an ultrasonic oscillator or a stirring bubble blowing mechanism provided under the water surface of the warm water or the alkaline water.
Effects of the invention
The reusable bag used in the recycling method of the present invention is a bag made of a nonwoven fabric, and a film having a printed ink layer is bonded to the surface of the bag through an adhesive layer having high hot water solubility so that the surface having the printed ink layer is on the adhesive layer side. Here, by setting one of the bag made of the nonwoven fabric and the film after the separation to have a specific gravity greater than warm water or alkaline water and the other to have a specific gravity less than warm water or alkaline water, the one having a lower specific gravity and the other having a higher specific gravity of the both can be floated up and down after the separation, and both can be easily collected.
When the film surface of the film having the printing ink layer is a treated surface selected from a corona treated surface, a plasma treated surface and a flame treated surface, the film has very strong adhesion to the printing ink layer. Therefore, the printed ink layer can be prevented from dissolving or dispersing in warm water or alkaline water, and therefore the nonwoven fabric is not colored in the separation step. Since the bag made of the nonwoven fabric is not colored in warm water or alkaline water, the bag made of the nonwoven fabric from which the printing ink layer has been separated can be used as a recycled material to obtain a recycled material of the nonwoven fabric which does not require a decoloring or dyeing step, and a recycling method can be provided in which the film having the printing ink layer can be easily separated from the bag made of the nonwoven fabric at low cost.
In the present invention, the film printed with the advertisement of another company is bonded to the bag made of nonwoven fabric, so that the manufacturer of the reusable bag can obtain the advertisement fee from the other company, and the selling price of the reusable bag can be reduced.
In addition, in the case where the handle is necessary, when the bag made of the nonwoven fabric used in the recycling method of the present invention is manufactured by using the nonwoven fabric of the same material and joining the bag materials of the bag to each other, the bag is sealed by heat sealing or ultrasonic sealing, and when the bag is processed by sewing, the bag is manufactured by using the same material as the nonwoven fabric or a thread having high hot water solubility, and at this time, the bag is immersed in hot water or alkaline water in a separation device and taken out, and then the regenerated material is the same material, so that the regeneration is easier.
In addition, if the bag made of the nonwoven fabric used in the recycling method of the present invention is used, the bag made of the nonwoven fabric after the regeneration is manufactured based on the recovered bag with the film, the commercialization rate of the regeneration can be improved, and the usage ratio of the raw nonwoven fabric material can be reduced when the bag made of the nonwoven fabric after the regeneration is manufactured.
In addition, when the recycling method of the present invention includes a mechanism for immersing the nonwoven fabric bag in hot water or alkaline water used in the separation device for a predetermined time, the separation of the nonwoven fabric bag and the film having the printed ink layer can be reliably performed.
In the recycling method of the present invention, the hot water or alkaline water used in the separation facility is mixed with a cleaning liquid, whereby the cleaning can be performed in the same separation facility.
In the separation apparatus of the recycling method according to the present invention, the bag made of a nonwoven fabric and the film having the printed ink layer can be reliably separated in a short time by providing an ultrasonic oscillator or a stirring bubble blowing mechanism in warm water or alkaline water, as desired.
Drawings
FIG. 1 is a block diagram showing a recycling method of the present invention.
Fig. 2 is a diagram showing a separation step performed by a separation tank of an enterprise in the recycling method according to the present invention.
Fig. 3 is a diagram showing a separation step by a separation tower of an enterprise and public institution in the recycling method of the present invention.
Fig. 4 is a view of a cross bar attached to a conveyor belt used in a separation step of the recycling method of the present invention.
Fig. 5 is a perspective view of a nonwoven fabric bag of production example 2.
Fig. 6 is a sectional view a-a' of fig. 5.
Fig. 7 is a schematic view showing a manufacturing process of the nonwoven fabric to which the film having the flexographic printing ink layer was bonded in manufacturing example 2. (a) The present invention relates to a method for producing a printed film, and more particularly, to a method for producing a printed film having a corona-treated surface, which comprises (a) a printing step of providing a printing ink layer on the corona-treated surface of the film, (b) a step of providing an adhesive layer having warm water solubility on the film having the printing ink layer, and (d) a bonding step of bonding the film having the adhesive layer to a nonwoven fabric.
Fig. 8 is a schematic diagram showing a separation test in which the PET film 4 is separated from the nonwoven fabric sheet of the test example. (a) The (a) is a schematic view showing a nonwoven fabric sheet to which a PET film 4 having a printing layer 5 is bonded, and (b) is a schematic view showing the PET film 4 having a printing ink layer 5 and the nonwoven fabric sheet after separation in a warm water tank.
Description of the reference numerals
1 bag made of non-woven fabric
3 Polypropylene nonwoven fabric
4 polyethylene terephthalate (PET) film
5 flexographic printing ink layer
6 Corona treatment of surfaces
7 adhesive layer (polyvinyl alcohol film)
14 handle
15 sealing sheet
16 ear
18 side part
33 nonwoven fabric sheet
35 Silk-screen printing ink layer
51 recycled material inlet
52 air or vibration
53. 54, 61, 63, 70 belt conveyor
55 slot inner input port
56 groove
57 Warm (or alkaline) water
58 ultrasonic terminal or bubble blowing mechanism for stirring
59 circulating water blow-out port
60 circulating water outlet
62 recycled material carrying-out port
64 regenerated material accumulation groove
65 membrane stacking tank
66 anti-floating plate
67 bag with film
68 bag made of nonwoven fabric
69 film with a layer of printing ink
71 Cross bar of belt conveyor
81 input area
82 separation zone
83 extraction area
100 enterprises and institutions
101 preparation step
103 bonding step
105 separation step
107 drying step
108 bag regeneration step
110 shop
113 distribution step
114 recovery step
120 customers
Detailed Description
The reusable bag made of the nonwoven fabric of the present invention is obtained by bonding a film having a printing ink layer to the adhesive layer side via an adhesive layer having warm water solubility on the surface. Relates to a reusable bag made of non-woven fabric comprising: the printing ink layer is a flexographic printing ink layer or a gravure printing ink layer, and the surface of the film on the side having the printing ink layer can be a treated surface selected from a corona treated surface, a plasma treated surface, and a flame treated surface.
(specific gravity of reusable bag and film made of nonwoven Fabric)
A bag with a film has been separated into a bag made of nonwoven fabric and a film having a printed ink layer by a separation device of an enterprise and a public institution, and in order to enable easy removal, it is desirable that one of the bag and the film has a specific gravity smaller than that of warm water or alkaline water and the other has a specific gravity larger than that of the warm water or alkaline water.
Here, the specific gravity of the bag may be set to be smaller than the specific gravity of the warm water or the alkaline water and the specific gravity of the membrane may be set to be larger than the specific gravity of the warm water or the alkaline water, or conversely, the specific gravity of the bag may be set to be larger than the specific gravity of the warm water or the alkaline water and the specific gravity of the membrane may be set to be smaller than the specific gravity of the warm water or the alkaline water.
(reusable bag made of nonwoven Fabric)
The reusable bag of the present invention is not particularly limited in size and shape as long as it is made of nonwoven fabric. Examples of the bag include shopping bags, clothing bags, and bedding storage bags. Preferred examples thereof include shopping bags which are usually reused and can be easily recycled as recycled materials after use, i.e., bags in the form of so-called purchasing bags.
The nonwoven fabric is light, can be folded or kneaded, can be re-unfolded even in use to easily return to its original shape, has excellent portability, and can be used as a reusable bag.
Further, since the bag made of the nonwoven fabric can be made of the nonwoven fabric and the thread formed of the same material, the bag can be directly sent to the bag regeneration step without being separately decomposed, and the bag made of the nonwoven fabric can be regenerated very easily.
As the nonwoven fabric used in the reusable bag of the present invention, known nonwoven fabrics can be used, and examples thereof include polyester, polyethylene, polypropylene, polyolefin, vinylon, and the like.
The film-attached bag is immersed in warm water or alkaline water to dissolve the adhesive layer, and is separated into a film having a printing ink layer and a bag made of a nonwoven fabric. The film and the bag can be easily recovered by making one of them have a higher specific gravity than warm water and alkaline water and making the other have a lower specific gravity than warm water and alkaline water.
When the specific gravity is smaller than that of the warm water and the alkaline water, a nonwoven fabric having a specific gravity of 0.99 or less, preferably 0.95 or less can be used. For example, the specific gravity of polypropylene is usually 0.90 to 0.91, and the specific gravity of polyethylene is usually 0.94 to 0.97.
When the specific gravity is higher than that of the warm water or the alkaline water, a nonwoven fabric having a specific gravity of 1.01 or more, preferably 1.05 or more can be used. For example, the specific gravity of polyester is usually 1.10 to 1.46, and the specific gravity of vinylon is usually 1.26 to 1.30.
As the nonwoven fabric, a polyolefin nonwoven fabric is preferable from the viewpoint of the easiness of recycling, strength, moldability and the like, and for example, a polyethylene nonwoven fabric or a polypropylene nonwoven fabric is used. Among them, polypropylene nonwoven fabrics which can be easily regenerated are particularly preferable.
(film)
The film of the present invention has a flexographic printing ink layer or a gravure printing ink layer on one surface, for example, and the surface of the film on the side having the printing ink layer can be a treated surface selected from a corona treated surface, a plasma treated surface, and a flame treated surface, for example.
Examples of the film substrate include transparent resin films such as polyester films, polyethylene films, polypropylene films, polystyrene films, vinyl chloride films, polyethylene terephthalate films, and nylon films.
The film-attached bag is immersed in warm water or alkaline water to dissolve the adhesive layer, and is separated into a film having a printing ink layer and a bag made of a nonwoven fabric. The film and the bag can be easily recovered by making one of them have a higher specific gravity than warm water and alkaline water and making the other have a lower specific gravity than warm water and alkaline water.
When the specific gravity is smaller than that of the warm water and the alkaline water, a film having a specific gravity of 0.99 or less, preferably 0.95 or less can be used. For example, the specific gravity of polypropylene is usually 0.90 to 0.91, and the specific gravity of polyethylene is usually 0.94 to 0.97.
When the specific gravity is larger than that of the warm water or the alkaline water, a membrane having a specific gravity of 1.01 or more, preferably 1.05 or more can be used. For example, polystyrene generally has a specific gravity of 1.04 to 1.09, polyester generally has a specific gravity of 1.10 to 1.46, and polyethylene terephthalate generally has a specific gravity of 1.34 to 1.39.
Among the above film base materials, a polyethylene terephthalate (PET) film is particularly preferable from the viewpoint of scratch resistance, transparency, water resistance, weather resistance and processability.
The thickness of the film base is preferably 10 μm or more, more preferably 12 μm or more, and preferably 100 μm or less, more preferably 60 μm or less, and further preferably 40 μm or less, from the viewpoint of improving ink transferability and suppressing plate fogging.
In addition, from the viewpoint of improving the flexibility of flexographic printing and gravure printing, for example, the surface of the film base material to be printed is oxidized by corona treatment, plasma treatment, flame treatment, hot air treatment, chromic acid treatment, ozone/ultraviolet treatment, or the like to form a treated surface having improved wettability, whereby the adhesion between the printing ink layer and the adhesive layer described below can be improved. In particular, it is preferable that the surface to be printed is a treated surface formed by corona treatment, plasma treatment, or flame treatment.
The corona treatment, flame treatment, or plasma treatment in the present invention can be appropriately selected depending on the type of film, the printing method, and the type of ink. In any of the processing methods, the processing conditions such as the output and the processing speed can be arbitrarily and appropriately adjusted.
The corona treatment is a treatment of the surface by corona discharge irradiation with high frequency and high voltage. In the present invention, a commonly used corona treatment device can be used, and examples thereof include a device available from spring motors, bucky industries, and martinbo Corporation (MATSUBO Corporation). In addition, there are also devices attached to the printer by the printer manufacturer.
The flame treatment can be carried out by treating the surface with a flame generated when a combustible gas such as natural gas or propane gas is burned while oxygen is blown into the gas by a known method. Examples of the flame treatment device include a flame (flame) treatment device manufactured by Flynn Burner, USA, a flame (flame) treatment device manufactured by esseCI, Italy, and B1-100 manufactured by Alcotech.
The plasma treatment can be performed by applying an electric field to molecules of a monomer or a mixed gas such as argon, helium, neon, hydrogen, oxygen, or air using a high frequency to ionize the molecules and blow the ionized molecules onto the surface by a known method. The processing can be performed by adjusting the flow rate of the gas, the applied voltage, the frequency, the moving speed of the sample, and the like. An example of the plasma processing apparatus is a Plasa-Treat system manufactured by AGRO DYN.
Among corona treatment, flame treatment, and plasma treatment used in the present invention, flame treatment and plasma treatment are stronger in treatment energy than corona treatment, and thus may cause damage to the film surface or the surface of the printed ink layer due to the treatment energy. In the present invention, the surface of the film is preferably subjected to corona treatment by a corona treatment device.
The treatment energy of the corona treatment is 600-12000J/m2(10 to 200 W.min/m)2) Preferably 1200 to 9000J/m2(20 to 180 W.min/m)2). The energy to sufficiently obtain the effect of the corona discharge treatment was 600J/m2(10 W.min/m)2) Above, more than 12000J/m2(200 W.min/m)2) The effect of the treatment was the same, and thus was 12000J/m2(200 W.min.)/m2) The following is sufficient.
In addition, the printing surface of the film base material may be subjected to primer treatment before printing. As the primer, a known primer such as a polyurethane resin or an olefin resin can be used.
The printing method of the printing ink layer is not particularly limited as long as it is a method used in film printing, and any of relief printing such as flexographic printing and letterpress printing, intaglio printing such as gravure printing, offset printing such as offset printing, stencil printing such as screen printing, and the like can be used, and in particular, flexographic printing or gravure printing is preferable from the viewpoint of printability, aesthetic properties, hygienic properties, and simplicity with respect to a film substrate such as a PET film. The flexographic printing and the gravure printing can use a known flexographic printing method and a known gravure printing method.
The printing ink may be any ink that is insoluble in warm water or an alkaline aqueous solution, and any ink used in conventional flexographic printing or gravure printing may be used. Among them, water-based inks and UV-curable inks are particularly preferable from the viewpoint of environmental protection without using solvents.
By flexography or gravure printing, a logo unique to each store, or a promotional advertisement of a business or its product, or the like is back-printed on the film. In the film-equipped bag of the present invention, the surface of the printing ink layer is protected by a film. Therefore, the printed ink layer can be prevented from being damaged, peeled off, or deteriorated in color when the film-attached bag is used.
A concealing layer may be provided on the side of the film on which the ink layer is printed. Through setting up hidden layer, even the non-woven fabrics after dyeing, can not receive the influence of the colour of non-woven fabrics and make the color on printing ink layer fuzzy yet, and can have the printing ink layer that shows colour beautifully.
The concealing layer is formed using a white ink layer or a layer having a color tone equal to or close to that of the bag made of nonwoven fabric. The white ink layer is formed using a white ink containing a white pigment containing titanium oxide as a main component and a binder resin as main components. The white pigment used is preferably composed mainly of titanium oxide, and may contain zinc oxide or the like as an accessory component. In particular, titanium oxide exhibits excellent properties in whiteness, hiding power (which means the ability of a pigment or paint to completely hide a black-and-white substrate), and tinting strength, and is excellent in chemical resistance and stability to light or heat.
As the binder resin used for the concealing layer, any resin can be used, and examples thereof include acrylic resins, cellulose resins, polyester resins, vinyl chloride resins, polyurethane resins, polycarbonate resins, and partially crosslinked resins thereof.
The shielding layer may be made of the same material as the film or a shielding film. Examples of the base material of the shielding film constituting the shielding layer include transparent resin films such as polyester films, polyethylene films, polypropylene films, polystyrene films, vinyl chloride films, polyethylene terephthalate (PET) films, and nylon films.
(adhesive layer)
The adhesive layer in the present invention is a layer formed of an adhesive capable of bonding the surface of the bag body of the bag made of the nonwoven fabric of the present invention and the surface of the film having the printed layer after bonding. The adhesive layer in the present invention is required to have the following properties: the film-attached bag of the present invention is required not to be dissolved in low-temperature water from the viewpoint that the film does not peel off even if it is wetted with rain, but to be easily separated from the surface of the bag, for example, to be easily dissolved when immersed in high-temperature water of 60 ℃. Therefore, as a polymer satisfying these requirements, it is preferable that the solubility is less than 20g per 100g of water at 20 ℃ and 60g or more per 100g of water at 60 ℃.
In the present invention, as the adhesive layer having the above-described special water resistance, that is, a property of being easily dissolved in high-temperature water of 60 ℃ or higher but being hardly dissolved in low-temperature water such as normal-temperature water, an adhesive layer containing polyvinyl alcohol is preferably used.
The polyvinyl alcohol used in the present invention is not particularly limited as long as it has the above-mentioned water resistance, and may be, for example, a modified polyvinyl alcohol having various modifying groups such as an alkoxy group, an ester group, and an alkylene ether group. The saponification degree is preferably 97.5 mol% or more. In particular, denatured polyvinyl alcohol having a crosslinked structure obtained by polymerizing polyvinyl alcohol and a crosslinking agent is preferably used. Among them, the compound represented by the following formula is particularly preferably used, for example
(formula 1)
(wherein l is 0. ltoreq. l.ltoreq.1, m is 0. ltoreq. 1, n is 0. ltoreq. n.ltoreq.1, and l + m + n is 0.8. ltoreq. 1) with a crosslinking agent, and (l, m, and n represent molar ratios of the respective structures; the polymer may be a random polymer or may have a block polymerization moiety). Examples of the products of sale of polyvinyl alcohol and denatured polyvinyl alcohol include trade names of japan synthetic chemical industry co: GohsenollNH-26, GohsenollNH-20, GohsenollNH-18, GohsenollN-300, GohsenollNm-14, GohsenollNm-11, GohsenollNL-05, GohsenollAH-26, GohsenollAH-17, GohsenoloA-300 Gohsenolc-500, GohsenolP-610, GohsenollAL-06R, GohsenolGH-23, GohsenolGH-20, GohsenolGH-17, GohsenolGm-14, GohsenolGm 14L, GohsenolGL-05, GohsenolGL-03, GohsenKH-20, GohsenolKH-17, Gohsenolubolub-05, GohsenolKL-03, Gohsenkl-08R, GohsenolNK-05R, GoseifamerZ-100, GohsenmerKjefz-200, Gosamerfymerzz-205, GohsenqinreflZ-220, GohsenymerkZ-220, GohsenqinreXhoisySelK-220, GohsenkZ-220, Gohsenkz III, GohsenkN-220, GohsenkN-5, GohsenkI, Gohsenkz III, GohsenkN-320, Gohsenkz-5, Gohsenkz-300, Gohsenkj-5, Gomerkj-5, Gohsenkj-5, Gomerkj-320, Gohsenymerkj-5, Gohsenkj-3, Gohsenymerymerymerkj-3, Gomerymerymerymerymerymerymerymerymerymerymeryk, Gomeryk, Gomerymerymeryk, Gomerymeryk, Gomeryk, Gomerymerymerymeryk, Gomerymerygomeryk, Gomeryk, Gomerymeryk, Gomerygomeryk, Gomerymeryk (Gomerymeryk, Gomeryk, Gomerymerymerymeryk, Gomerymeryk, Gomeryk, Gomerymeryk, Gomerymerymerymeryk, Gomerymerygomeryk, Gomeryk, Gomerymerymeryk, Gomeryk, Gomerymeryk, Gomerygomerygomerymeryk, Gomerymerymerymeryk, Gomerymerymeryk, Gomeryk, Gomerymeryk, Gomeryk, Gohsenkz-320, Gomeryk, Gomerymeryk, Gomeryk, Gomerymerymeryk, Gomeryk, Gomerygomeryk, Gomeryk, Gomerygomerygo: GohsenxZ-100, GohsenxZ-200, GohsenxZ-300, GohsenxZ-410, and the like.
The crosslinking agent used in the present invention is not particularly limited as long as it is a compound capable of imparting water resistance as described above by crosslinking polyvinyl alcohol, and examples thereof include polyvalent metal compounds, boron compounds, amine compounds, hydrazine compounds, silane compounds, compounds containing a hydroxymethyl group, compounds containing an aldehyde group, epoxy compounds, thiol compounds, and isocyanate compounds. These may be used alone or in combination of two or more. As the products for sale, for example, Glyoxal GX (manufactured by Nippon synthetic chemical industries Co., Ltd.), SumimarM-30W (manufactured by Sumitomo chemical Co., Ltd.), and Highlink DM (manufactured by Clariant) are preferable. The crosslinking agent is added in an amount of more than 0.1% by mass and 2.0% by mass or less, preferably more than 0.1% by mass and 1.5% by mass or less, and further preferably more than 0.5% by mass and 1.0% by mass or less, based on the mass of the polyvinyl alcohol. When the amount of the crosslinking agent added is less than the lower limit of the above range, the degree of crosslinking is insufficient and water resistance to normal-temperature water and high-temperature water cannot be obtained, and when the amount of the crosslinking agent added is more than the upper limit of the above range, particularly 2.0 mass%, the degree of crosslinking is considerably high and water resistance to normal-temperature water is high and water resistance to high-temperature water is also too high, and water resistance required for the adhesive layer of the present invention which is easily dissolved in high-temperature water of 60 ℃ or higher but is difficult to dissolve in low-temperature water such as normal-temperature water cannot be obtained.
The acetoacetylated polyvinyl alcohol used in the present invention is desirably obtained by acetoacetylating polyvinyl alcohol, and as the method, a method of dispersing polyvinyl alcohol in an acetic acid solvent and adding diketene thereto, a method of dissolving polyvinyl alcohol in advance in a solvent such as dimethyl formaldehyde or dioxane and adding diketene thereto, a method of directly contacting diketene gas or liquid diketene with polyvinyl alcohol, or the like is preferably used.
In the present invention, when polyvinyl alcohol having an acetoacetyl group introduced into a side chain is reacted with an amine compound as a crosslinking agent, a crosslinked structure as described below is formed.
(chemical 2)
When polyvinyl alcohol having an acetoacetyl group in the molecule is reacted with a compound containing an aldehyde group as a crosslinking agent, a crosslinked structure as described below is formed.
(chemical 3)
When polyvinyl alcohol having an acetoacetyl group in the molecule is reacted with a methylol group-containing compound as a crosslinking agent, a crosslinked structure as described below is formed.
(chemical formula 4)
When polyvinyl alcohol having an acetoacetyl group in the molecule is reacted with a polyvalent metal compound as a crosslinking agent, a crosslinked structure as described below is formed.
(chemical formula 5)
The acetoacetylated polyvinyl alcohol having a crosslinked structure of the present invention is hardly soluble in an acidic condition and easily soluble in a strong alkaline condition, and therefore can be easily dissolved by using alkaline water such as an aqueous sodium hydroxide solution in addition to high-temperature water of 60 ℃.
The adhesive layer in the present invention can be formed between the nonwoven fabric and the film by, for example, applying or spraying the polymer or a solution obtained by dissolving or dispersing the polymer in water or a solvent to the surface of the film having the printed ink layer, predrying the film as necessary, and then (heat) pressure-bonding or heat-melting the film to the nonwoven fabric. For example, the adhesive layer can be formed by laminating a polymer having warm water solubility in the form of a thin film on the surface of the film having the printed ink layer, and pressing (heating) or thermally melting the film to a nonwoven fabric.
In the separation step of the present invention, the membrane-attached bag immersed in warm water or alkaline water is subjected to vibration, for example, vibration caused by ultrasonic vibration or air bubbles, whereby the membrane is further easily peeled off from the bag made of nonwoven fabric. The printing ink layer on the surface of the separated film is usually water-insoluble and is difficult to dissolve even in warm water or alkaline water. Further, when the surface of the film having the printing ink layer is treated by a treatment surface selected from corona treatment, plasma treatment and flame treatment, the printing ink layer does not easily separate from the film in warm or alkaline water. Therefore, the ink of the printing ink layer is not dissolved or dispersed in warm water or alkaline water, that is, the bag made of the nonwoven fabric is not colored or dyed, and the film having the printing ink layer can be removed from the bag. As described above, the nonwoven fabric bag is not colored, and as a further measure, the type and concentration of the adhesive to be laminated between the printing ink layer and the nonwoven fabric bag may be changed so that the adhesive is 2 or more layers. In this case, it is desirable to coat or spray a layer of an adhesive having a higher solubility in warm or alkaline water on the bag side made of nonwoven fabric.
(method of manufacturing reusable bag)
The reusable bag of the present invention can be produced by a known method depending on the application and shape, and the bag may be formed of a nonwoven fabric to which a film having a printed ink layer is bonded, or a film having a printed ink layer is bonded.
For example, a continuous film having a printed ink layer is prepared in advance, and the bag can be manufactured by continuously pressure-bonding the continuous film to the surface of the nonwoven fabric with the adhesive by hot rolls before, during, or after the process of manufacturing the bag made of the nonwoven fabric using an automatic bag making machine.
The reusable bag of the present invention may be provided with an adhesive film at 2 or more locations. In the case of 2 or more site-adhesive films, the patterns, characters, and the like of the printing ink layers may be the same or different. For example, a film printed with a logo or the like for identifying the company (store or the like) may be bonded to one surface of a bag made of nonwoven fabric, and a film printed with a advertisement or the like for a commodity of another company may be bonded to the other surface. The price of the non-woven fabric bag can be set relatively inexpensively by the advertising fee obtained by the operator of the reusable bag.
When the handle is joined to the bag made of nonwoven fabric, the handle can be joined by a known method, for example, by heat sealing or ultrasonic sealing, or by sewing with a polypropylene thread similar to the nonwoven fabric or a thread having high hot water solubility. Thus, the bag made of the nonwoven fabric from which the film having the printed ink layer has been separated can be used as a recycled material without an additional step of removing stitches. In order to reuse the nonwoven fabric bag, it is preferable that a portion to which a load is applied, such as a bottom surface portion of the bag or a joint portion between the handle and the bag body, be joined by sewing stronger than heat sealing.
The yarn having warm water solubility may have solubility to the same extent as the adhesive layer of the present invention, and examples thereof include polyvinyl alcohol fibers and vinylon fibers.
The present invention is not limited to the shopping bags described above, and can be applied to bags made of other nonwoven fabrics, for example, storage bags such as storage bags, clothing bags, insect-proof covers, and bedding storage bags, and desiccant bags.
The nonwoven fabric to which the film is bonded is not limited to use as a bag, and can be used as a material for other nonwoven fabric products, for example, clothing (surgical gown, lab coat, protective clothing), protective articles (work gloves, smoke mask, dust mask, gas mask), medical articles (cap, mask, sheet, antibacterial pad), packaging materials, miscellaneous goods for daily use (calendar, non-slip sheet, eye mask, book cover, deodorant sheet), table top (table cloth, mat, glass mat), business articles (envelope), handicraft articles, iron mat, OA equipment (registered trademark) optical disk mat, CD/DVD case), and the like.
In the separation device, when the film having the printed ink layer is separated from the bag with film, only water is used without using an organic solvent or the like, and therefore, the health of the operator is not affected, and further, environmental influences such as soil pollution are not caused. However, when alkaline water is used, it is necessary to adjust the pH and neutralize the water if the water is discarded.
(examples)
The present invention will be described below by way of examples, but the present invention is not limited to these examples.
(production example 1): manufacture of continuous nonwoven sheet
The production of a film having a printed ink layer will be described with reference to fig. 7. A roll of easy-to-print PET film 4 (fig. 7(a)) having a corona-treated surface 6 with a printing surface subjected to corona treatment and a width of 22cm and a thickness of 12 μm was prepared, and a printing ink layer 5 (having a coating thickness of 3 μm (at the time of drying)) was printed on the printing surface of the continuous PET film 4 using a water-based flexographic ink that was sold to the outside by a printer (fig. 7 (b)). Next, a roll of polypropylene nonwoven fabric 3 having a width of 120cm was prepared, a polyvinyl alcohol aqueous solution was applied to the printing surface of the continuous PET film 4 to form a continuous adhesive film having an adhesive layer 7 (fig. 7(c)), the continuous adhesive film was hot-rolled to a position 25 to 47cm from one end in the longitudinal direction of the continuous nonwoven fabric 3, and the film 4 having the flexographic printing ink layer 5 was bonded via the adhesive layer 7 having warm water solubility, thereby obtaining a continuous nonwoven fabric sheet (fig. 7 (d)). Fig. 6 shows a cross-sectional view of a film having a printed ink layer in an actual film-attached bag (fig. 5).
The specific gravity of the PET film 4 used was about 1.3, and the specific gravity of the continuous nonwoven fabric sheet used was about 0.93.
This polyvinyl alcohol aqueous solution was gohsenol nh-18 (manufactured by mitsubishi chemical corporation) having a solid content concentration of 17%, and 100g of water at 20 ℃ was soluble only about 2g, but about 80g of water was easily soluble in 60 ℃.
(production example 2): manufacture of shopping bags
The manufacture of the shopping bag 1 shown in fig. 5 will be described. The continuous polypropylene nonwoven fabric sheet (50cm × 120cm rectangular) of production example 1 was placed in an automatic bag making machine, and a bag made of nonwoven fabric was cut to form a handle portion 14, a seal sheet 15, and an ear portion 16. Next, the side portions 18 of the bag made of nonwoven fabric were ultrasonically sealed, and the film having the printed ink layer was firmly bonded through the nonwoven fabric. Subsequently, the handle portion and the bottom portion are sewn with polypropylene fibers to obtain a shopping bag 1.
The heat sealing was performed by impulse heat sealing (basic conditions: heater (pair of cylindrical columns: diameter of each column: 0.9mm), heating (sealing) time 4 seconds, voltage 220V, instantaneous current 45A).
(test example): separation of PET film from non-woven sheet with printing ink layer
The test for separating the film from the nonwoven fabric with a film shown in the schematic view of fig. 8 will be described. From the continuous nonwoven fabric sheet made of polypropylene produced in production example 1, a portion to which the film 4 having the flexographic ink layer 5 was bonded was cut out in a size of 5cm × 10 cm.
The cut nonwoven fabric sheet and warm water of 65 ℃ were put into a sealable tubular transparent container, and after 5 minutes of ultrasonic vibration in a warm water tank maintained at 65 ℃, the adhesive layer was dissolved, the nonwoven fabric sheet was separated from the PET film 4 having the flexographic printing ink layer 5, the nonwoven fabric sheet floated, and the PET film 4 having the flexographic printing ink layer 5 was sunk. Only the floating nonwoven fabric sheet can be easily taken out from the container.
At this time, no coloration or dyeing of the nonwoven fabric sheet or the warm water due to the dissolution or dispersion of the flexographic printing ink layer 5 in the warm water was observed.
The shopping bag 1 after the removal of the PET film 4 having the flexographic printing ink layer 5 according to the present invention can be produced by regenerating a nonwoven fabric as a regeneration material to form a bag without dyeing or decoloring only by washing, thereby enabling the re-production of a new shopping bag.
It is therefore evident that the bag 1 of the invention can be recycled biochemically by recycling.
The shopping bag of production example 2 is made of a nonwoven fabric made of polypropylene, and the bag does not break or tear from the seams at the bag side even when a large amount of goods or heavy goods are put in, and the bag body does not stretch or tear even when an angular goods is put in, so that the load limit and the allowable volume of the contents contained in the bag can be significantly increased as compared with conventional shopping bags. Therefore, the shopping bag of the present invention can be used repeatedly, usually 10 times or more, even if heavy goods or bulky goods are repeatedly put in and used. The shopping bag of manufacturing example 2 is light and can be folded to be small, and the original shape is easily restored after being folded and unfolded again, so that the shopping bag is very suitable for carrying.
(example): method for recycling bag made of non-woven fabric
The process example in the recycling method of the present invention includes: as shown in fig. 1, a preparation step 101 and an adhesion step 103 for producing a film-attached bag, a distribution step 113 and a collection step 114 for a film-attached bag in a retail business place, a separation step 105 and a bag recycling step 108 in an enterprise, and a drying step 107 provided as desired.
As a process for manufacturing a film-attached bag, there is included: a preparation step 101 of preparing a reusable bag made of a nonwoven fabric and a film having a printed ink layer on which shop information, advertisement information, or the like is drawn; and an adhesive step 103 of bonding the film to the bag so that an adhesive layer having warm water solubility is located between the film and the bag, thereby processing the film-attached bag.
In the distribution process 113 at the retail business place, the film bags are exchanged or sold for a fee to the customers 120 at each shop 110.
In a recycling step 114 at a retail business place, used film bags that have been repeatedly used by customers are recycled. In order to recover more used bags with films that have been used repeatedly, the customers can exchange the used bags with new bags with films or sell the new bags with films in a discount, provided that the customers bring the used bags into the store. It is also possible to consider introducing an deposit regime.
In the separation step 105 of the enterprise and public institution, as shown in fig. 2 and 3, the used film-attached bag 67 (recovered material) as the recovered material is separated into a bag 68 (recycled material) made of nonwoven fabric and a film 69 having a printed ink layer in the separation equipment. In the examples, the case where the bag made of nonwoven fabric is made of polypropylene having a smaller specific gravity than the warm water and the alkaline water, and the film is made of polyethylene terephthalate having a larger specific gravity than the warm water and the alkaline water will be described. The separation step includes a supply stage, a separation stage, and a take-out stage, and the separation apparatus has a structure in which a feed area 81, a separation area 82, and a take-out area 83 are connected in this order. Consider a separation apparatus employing the tank configuration shown in figure 2 and the column configuration shown in figure 3.
A separation apparatus based on a trough configuration is illustrated. At the stage of supply from the tank 56, the used film-attached bag 67 (collected material) is put into the enterprise and public facilities through the inlet 51, and the used film-attached bag 67 is dispersed by air or vibration 52. Further, in order to transfer the used film-attached bag 67 upward, the used film-attached bag 67 is transferred by the belt conveyors 53 and 54 installed to be inclined upward with respect to the horizontal, and the used film-attached bag 67 is sequentially supplied from the in-tank inlet 55 to the tank 56. Further, fig. 4(a) shows a cross bar 71 attached to the belt conveyors 53, 54.
In the tank 56, warm water or alkaline water 57 at 55 ℃ or higher, preferably 60 ℃ or higher is filled in the tank 56 in a state where the input area 81, the separation area 82, and the extraction area 83 are filled with warm water or alkaline water. Some of the warm water or alkaline water 57 in the tank 56 flows out of the tank through the circulating water outlet 60 once, and then returns from the circulating water outlet 59 to the tank by a pump or the like in water to form a water flow. The used membrane-attached bag 67 put into the putting-in area 81 is transferred from the circulating water outlet 59 to the lower side of the floating-up preventing plate 66 provided in the separation area 82 along with the water flow. In the separation step, the film-attached bag 67 is provided with an adhesive layer having high hot water solubility between the surface of the bag and the film 69 having the printed ink layer, and the adhesive layer is dissolved by the hot water or alkaline water 57 and separated into the bag 68 made of a nonwoven fabric and the film 69 having the ink layer. In the case where the separation is surely performed, if the ultrasonic terminal or the stirring bubble blowing mechanism 58 is provided in the tank, the separation of the bag 68 made of the nonwoven fabric and the film 69 having the printed ink layer can be promoted by the vibration of the ultrasonic wave or the stirring and vibration of the bubbles.
In the take-out stage after the separation stage, the film 69 having the printed ink layer with a large specific gravity is sunk below the tank 56 in the take-out area 83 of the tank 56, and is carried out of the tank by the belt conveyor 61 provided at the bottom, and collected in the film stacking tank 65 having the film having the printed ink layer. On the other hand, the bag 68 (recycled material) made of nonwoven fabric floats up as having a lower specific gravity than the warm water or alkaline water 57, is carried out of the tank through the recycled material carrying-out port 62 by the belt conveyor 63, and is collected in the recycled material accumulation tank 64. The collected nonwoven fabric-made bag 68 proceeds to the subsequent drying process 107.
Further, fig. 4(b) shows a cross bar 71 attached to the belt conveyors 61, 63, 70.
When the separation facility has a tower structure, although the rising-prevention plate is not necessary, a water flow or a belt conveyor 70 for transferring the used membrane-attached bag 67 (recovered material) from the tank inlet 55 to the bottom of the tower is necessary. The used film bag 67 transferred to the vicinity of the water bottom by the belt conveyor 70 in the input area 81 is dissolved by the adhesive layer having warm water solubility in the separation area 82, and is separated into the bag 68 made of nonwoven fabric and the film 69 having the printing ink layer. The process of taking out the separated product from the take-out area 83 is the same as in the case of the separation tank.
When the nonwoven fabric bag 68 has dirt and needs to be cleaned, the cleaning can be performed simultaneously by mixing a cleaning agent or the like into the warm water or the alkaline water 57.
In the drying step 107, the nonwoven fabric bag 68 is dried after the separation step 105. A bag made of nonwoven fabric that can be used only by washing is dried and then sent to the preparation step 101.
In the bag recycling step 108, the bag 68 (recycled material) made of nonwoven fabric is crushed, loosened, or the like to restore the fiber state, and raw (japanese: バージン) nonwoven fabric raw materials are mixed or laminated as desired to produce a reusable bag made of nonwoven fabric after recycling.
(regeneration of the film)
The step of recycling the film includes: a step of removing the printing ink layer from the film 69 having the printing ink layer taken out in the separation step 105; a stage of forming a printing ink layer on the surface of the film 4 after removing the printing ink layer to process into a new film; and a step of applying the new film as a film having a printing ink layer in the preparation step 101. In the preparation step 101, the film 69 having the printing ink layer after the regeneration is prepared. In the next bonding step 103, an adhesive layer having warm water solubility is provided between the film 69 having the printing ink layer and the bag made of reusable nonwoven fabric after regeneration, and the adhesive layer is stuck and bonded to the bag made of reusable nonwoven fabric.
Industrial applicability
The bag can be regenerated and reused by manufacturing a reusable bag made of nonwoven fabric, recovering the bag as a used bag after using the bag, forming the bag into a nonwoven fabric sheet, and newly manufacturing a bag made of nonwoven fabric. By establishing such a recycling method, it is possible to avoid waste of resources and to avoid generation of carbon dioxide because incineration is not required, and therefore the present invention is very useful from the viewpoint of environmental protection and resource saving.
Claims (11)
1. A method for recycling reusable bags, characterized by comprising a preparation step, a bonding step, a dispensing step, a recycling step, a separating step, and a bag recycling step,
in the preparing step, a film having a printing ink layer on which shop information or advertisement information is drawn and a bag made of a non-woven fabric are prepared;
in the bonding step, bonding the film to the bag so that the printing ink layer is close to the surface of the bag and the adhesive layer having warm water solubility is located between the film and the bag, thereby processing the bag into a bag with a film;
in the distribution step, the film-attached bag is exchanged with a customer or distributed by paid sales at a retail business place;
in the recycling step, used film bags repeatedly used by customers are recycled from the customers in a retail business;
the separation process comprises:
a supply step of providing a mechanism for dispersing the collected used bags with the film in a state where the input area, the separation area, and the extraction area are filled with warm water or alkaline water in a separation facility having a structure in which the input area, the separation area, and the extraction area are connected in order, and supplying the used bags with the film to the input area,
A separation step of providing a mechanism for immersing the used film bag continuously transferred from the input area to the separation area in warm water or alkaline water in the separation area, dissolving the used film bag in the warm water or alkaline water through an adhesive layer having warm water solubility, and separating the used film bag into a bag made of non-woven fabric, a film having a printing ink layer, and
a taking-out step of providing a mechanism for taking out the nonwoven fabric bag and the printed ink layer film continuously transferred from the separation area to the taking-out area from the separation apparatus in each taking-out area, and taking out the nonwoven fabric bag and the printed ink layer film from the separation apparatus in each taking-out area;
in the bag recycling process, the taken-out bag made of the non-woven fabric is dried and processed into a reusable non-woven fabric bag, or the taken-out bag made of the non-woven fabric is crushed and opened, and a raw non-woven fabric raw material is mixed or laminated with the obtained non-woven fabric raw material, and then the reusable non-woven fabric bag is produced again based on the raw material obtained by mixing or laminating,
then, the reusable nonwoven fabric bag after the regeneration is reused as a nonwoven fabric bag in the preparation step.
2. The recycling method according to claim 1,
further comprises a film recycling process comprising: removing the printing ink layer from the film having the printing ink layer taken out in the separation step; a stage of forming a printing ink layer on the surface of the film after removing the printing ink layer, and processing the film into a new film with the printing ink layer; and a step of applying the new film as a film having a printing ink layer in the preparation step.
3. The recycling method according to claim 1, characterized in that:
the ink layer of the film having a printing ink layer prepared in the preparation stage is a flexographic printing ink layer or a gravure printing ink layer, and the surface of the film on the side having the ink layer is a treated surface selected from a corona-treated surface, a plasma-treated surface, and a flame-treated surface.
4. The recycling method according to claim 1, characterized in that:
the means for dispersing the collected used film-attached bags is provided with means for dispersing the used film-attached bags in the input area by wind or vibration.
5. The recycling method according to claim 1, characterized in that:
The means for immersing in warm water or alkaline water for a predetermined time in the separation zone of the separation step is, in the case where the separation means is a tank, the following means: a rising-prevention plate is provided under the surface of the warm water or alkaline water in the separation region, and a flow of the warm water or alkaline water is formed from the input region to the extraction region via the separation region, and the warm water or alkaline water is transferred under the rising-prevention plate by a film bag along with the flow;
in the case where the separation apparatus is a column, the following are the mechanisms: the used membrane bags are allowed to stay below the surface of the warm or alkaline water in the tower for a prescribed time.
6. The recycling method according to any one of claims 1 to 5, characterized in that:
the mechanism for taking out the nonwoven fabric-made bag and the film having the printed ink layer separated in the separation region outside the separation apparatus in each take-out region is as follows: the specific gravity of the bag made of the non-woven fabric and the specific gravity of the film with the printing ink layer are set to be higher than that of warm water or alkaline water and lower than that of the warm water or the alkaline water,
the one having a smaller specific gravity than the warm water or the alkaline water floats up, and the one is taken out of the separation device in a take-out area near the water surface of the separation device,
The other party having a specific gravity larger than that of the warm water or the alkaline water is taken out of the separation facility in a take-out area near the bottom of the water by sinking the other party.
7. The recycling method according to claim 6, characterized in that:
the bag made of the non-woven fabric with the film bag is a polypropylene non-woven fabric or a polyethylene non-woven fabric with the specific gravity smaller than that of warm water or alkaline water, and the film with the film bag is a polyethylene terephthalate film with the specific gravity larger than that of the warm water or the alkaline water.
8. The recycling method according to claim 1, characterized in that:
the adhesive layer is a layer which is formed using polyvinyl alcohol, denatured polyvinyl alcohol, or a polymer blend containing a mixture thereof, and has a solubility of less than 20g with respect to 100g of water at 20 ℃ and 60g or more with respect to 100g of water at 60 ℃.
9. The recycling method according to claim 1, characterized in that:
in the case where the bag made of the nonwoven fabric requires a handle, when the bag is made by using nonwoven fabrics of the same material and joining the bag materials of the bag to each other, heat sealing or ultrasonic sealing is used, and when the bag is processed by sewing, the bag is made by using a thread of the same material as the nonwoven fabric or a thread having a high hot water solubility.
10. The recycling method according to claim 1, wherein:
the bag made of nonwoven fabric is cleaned in the separation step by mixing a cleaning agent into warm water or alkaline water used in the separation equipment in the separation step.
11. The recycling method according to claim 1 or 10, characterized in that:
the separation equipment is provided with an ultrasonic oscillator or a bubble blowing mechanism for stirring under the water surface of warm water or alkaline water.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-188820 | 2020-11-12 | ||
| JP2020188820A JP7323133B2 (en) | 2020-11-12 | 2020-11-12 | Circular recycling system for reusable bags |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114472480A true CN114472480A (en) | 2022-05-13 |
Family
ID=81491852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110268603.XA Pending CN114472480A (en) | 2020-11-12 | 2021-03-12 | Recycling method of reusable bag |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7323133B2 (en) |
| CN (1) | CN114472480A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496665A (en) * | 2008-01-28 | 2009-08-05 | 株式会社亚科喜缌 | Shopping bag made of nonwoven fabric |
| CN102529468A (en) * | 2010-12-20 | 2012-07-04 | 泰尔茂株式会社 | Method for making medical bag and medical bag |
| CN105831915A (en) * | 2016-05-18 | 2016-08-10 | 曲洪波 | Environment-friendly non-woven fabric bag and cyclic printing method |
| CN110272655A (en) * | 2019-07-09 | 2019-09-24 | 武汉威仕包装材料有限公司 | A kind of plastics weight film package bag printing water ink and preparation method thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0790181B2 (en) * | 1991-04-25 | 1995-10-04 | 株式会社御池鐵工所 | Sorting machine for waste plastic materials by difference in specific gravity |
| JPH1185034A (en) * | 1997-09-11 | 1999-03-30 | Dainippon Printing Co Ltd | Label |
| JP3662167B2 (en) | 2000-04-19 | 2005-06-22 | 株式会社タズミ | Waste plastic sorting equipment |
| JP2002140008A (en) | 2000-10-30 | 2002-05-17 | Toppan Forms Co Ltd | Hot water peelable label |
| JP2003165966A (en) | 2001-11-30 | 2003-06-10 | Toppan Forms Co Ltd | Releasable pressure-sensitive adhesive and label using the same |
| JP4658080B2 (en) | 2007-03-01 | 2011-03-23 | 株式会社明治ゴム化成 | Specific gravity sorter for waste resin flakes |
| JP5035691B2 (en) | 2008-05-20 | 2012-09-26 | 株式会社アクシス | Nonwoven products |
| JP5717023B2 (en) | 2010-02-17 | 2015-05-13 | 株式会社アクシス | Delivery goods storage bags and how to recycle and reuse them |
| JP5822497B2 (en) | 2011-03-24 | 2015-11-24 | 株式会社アクシス | Printing method for forming an easily removable printing ink layer |
| US20180260802A1 (en) | 2017-03-07 | 2018-09-13 | Walmart Apollo, Llc | Bag recycling program |
-
2020
- 2020-11-12 JP JP2020188820A patent/JP7323133B2/en active Active
-
2021
- 2021-03-12 CN CN202110268603.XA patent/CN114472480A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496665A (en) * | 2008-01-28 | 2009-08-05 | 株式会社亚科喜缌 | Shopping bag made of nonwoven fabric |
| CN102529468A (en) * | 2010-12-20 | 2012-07-04 | 泰尔茂株式会社 | Method for making medical bag and medical bag |
| CN105831915A (en) * | 2016-05-18 | 2016-08-10 | 曲洪波 | Environment-friendly non-woven fabric bag and cyclic printing method |
| CN110272655A (en) * | 2019-07-09 | 2019-09-24 | 武汉威仕包装材料有限公司 | A kind of plastics weight film package bag printing water ink and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022077806A (en) | 2022-05-24 |
| JP7323133B2 (en) | 2023-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2000509512A (en) | Label, container containing the label, and method of cleaning such container | |
| CN1922644B (en) | Label assembly and method of using the same | |
| US10723165B2 (en) | Secure devices for personal article identification, such as driver's licenses and vehicle license plates, and methods of producing such improved devices | |
| AP1151A (en) | Labelled, returnable plastic crate. | |
| US20100291329A1 (en) | In-mould label and method for manufacturing thereof | |
| CN107610582A (en) | Removable adhesive label containing inherently collapsible polymeric membrane | |
| CN102254482B (en) | Porous anti-uncovering seal | |
| US20140017405A1 (en) | Self-destructive irreversible security packaging film | |
| US11961422B2 (en) | Recyclable heat shrink film for recyclable container | |
| CN114472480A (en) | Recycling method of reusable bag | |
| US20220097443A1 (en) | Digital printed heat transfer graphics for soft goods | |
| JPH0734448Y2 (en) | Plastic label and plastic container | |
| JP2021178669A (en) | Reusable bag and recycling method thereof | |
| JP3232742U (en) | Reusable bag | |
| CN205707910U (en) | The false proof shopping bag of duty-free shop | |
| US6616786B2 (en) | Process for applying an ink-only label to a polymeric surface | |
| US20200096910A1 (en) | Digitally printed and produced heat transfer and method of manufacture | |
| CN219676788U (en) | Environment-friendly anti-counterfeiting label | |
| US6034704A (en) | Print stabilization process and apparatus | |
| US20010053441A1 (en) | Multi-layer composite film having a security feature | |
| JP2002512912A (en) | Painted plastic receipt and method for producing the same | |
| EP1957285A2 (en) | Improvements in and relating to image articles | |
| WO2023247726A1 (en) | Label for packaging | |
| KR200176279Y1 (en) | Recycle material for printing sticker | |
| IT202100000197A1 (en) | SELF-ADHESIVE LINERLESS MATERIAL WITH WASH-OFF PROPERTIES |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |