JP5717023B2 - Delivery goods storage bags and how to recycle and reuse them - Google Patents

Description

  The present invention relates to a delivery product storage bag, and more specifically, delivery for storing and delivering a delivery product to be delivered by a vehicle or the like, for example, a delivery product such as a document, a book, or a stationery, instead of conventional packaging or a packaging container. Product storage bag. More specifically, the present invention relates to a delivery product storage bag that is easy to recycle, is not easily damaged even when a heavy load is stored, is lightweight and compact, and is suitable for storage and carrying. Furthermore, the present invention relates to a method for recycling / reusing the delivery bag.

  Conventionally, in domestic logistics, delivery items such as documents, books, or stationery are generally specified containers, for example, bags whose openings can be freely opened and closed (for example, paper bags, plastic film bags, cloth bags, etc.), cardboard boxes. Are stored in a container or the like as necessary, and are delivered to a delivery destination by a delivery means such as a vehicle.

However, conventional bags (paper bags, plastic film bags, cloth bags) and cardboard boxes as storage containers for delivery products have the following problems.
That is, these conventional storage containers are usually disassembled or disassembled and discarded when a delivery product stored therein is taken out at a delivery destination. Conventional bags and cardboard boxes that have been disassembled or disassembled have been difficult to be effectively used again as storage containers. Bags and cardboard boxes can be used as they are multiple times without disassembling / disassembling, but the number of times they can be reused is limited due to damage and dirt.
Even if used bags and cardboard boxes are recycled and reused, the cost increases as the number of recycling increases, and the number of recycling is limited.
Further, since the cardboard box is generally bulky, it is necessary to secure a large primary storage place and storage place, and there is a problem that carrying the empty box is troublesome even when it is taken home from the delivery destination for reuse. In addition, it may take time and effort to assemble the cardboard box, and when the number of items to be delivered is large, the preparation and carrying of the delivery box is very cumbersome. Therefore, the delivery items such as documents, books, and stationery are shortened. There is a need for a storage container that can be handled efficiently in time.
That is, there has been a demand for a storage / delivery container that is easy to recycle, is not easily damaged when a heavy load is stored, and is lightweight and compact and suitable for storage and carrying.

As a result of intensive studies to achieve the above object, the present inventor has made the same polyolefin material for the non-woven sheet, yarn and hook-and-loop fastener used in the delivery product storage bag, so that they can be separated during recycling. It was found that it would be possible to save the troublesome work of carrying out and promote recycling of the delivery bag.
Further, when printing a logo mark or the like on the delivery product storage bag, a printing ink layer is provided on the bag surface, and a polymer region having high hot water solubility is provided between the printing ink layer and the bag. It has been found that by interposing it, it can be easily separated and removed from the bag body, and therefore, it is expected to promote recycling of the printed delivery bag.
Further, as a nonwoven fabric sheet used for a delivery bag, a recycled nonwoven fabric sheet in which a virgin fiber layer on the front side made of virgin polyolefin fibers and a recycled fiber layer on the back side made of recycled polyolefin fibers are laminated and integrated is used. It has been found that by using it, a delivery product storage bag having the required strength and good surface appearance as a reusable nonwoven sheet can be provided.
Then, a storage bag recycling / reuse system mainly composed of the delivery product storage bags having these improved structures was constructed, and the present invention was completed.

That is, the present invention relates to a nonwoven fabric delivery storage bag described in the following [1] to [18] and a method for recycling the delivery product storage bag.
[1] A delivery product in which a nonwoven fabric sheet made of polyolefin nonwoven fabric is cut, sewn into a bag shape using a thread, and a hook-and-loop fastener is attached to the bag surface near the opening so that the opening of the bag can be closed. A storage bag,
The delivery bag is characterized in that the yarn and the hook-and-loop fastener are made of the same polyolefin material as that of the nonwoven fabric sheet.
[2] A printing ink layer is provided on the bag surface, and a polymer region having high hot water solubility is interposed between the printing ink layer and the bag. [1] Delivery goods storage bag of description.
[3] The polymer region is composed of a polymer having a solubility of less than 20 g with respect to 100 g of water at 20 ° C. and 60 g or more with respect to 100 g of water at 60 ° C. Delivery goods storage bag.
[4] The delivery product storage bag according to [2] or [3], wherein the polymer region includes a modified polyvinyl alcohol having a crosslinked structure.
[5] The modified polyvinyl alcohol comprises a polymer having a solubility of less than 20 g with respect to 100 g of water at 20 ° C. and 60 g or more with respect to 100 g of water at 60 ° C. Delivery goods storage bag.
[6] The delivery product storage bag according to any one of [2] to [5], wherein the polymer region includes a layer of the polymer formed on a surface of the nonwoven fabric sheet of the bag.
[7] The delivery product storage bag according to any one of [2] to [5], wherein the polymer region is formed by impregnating the polymer into the nonwoven fabric sheet of the bag.
[8] The delivery product storage bag according to [1], wherein the non-woven fabric sheet is an unregenerated non-woven fabric sheet made of virgin polyolefin fibers or a regenerated non-woven fabric sheet containing regenerated polyolefin fibers.
[9] The recycled nonwoven fabric sheet is a nonwoven fabric sheet in which a virgin fiber layer on the front side made of virgin polyolefin fibers and a recycled fiber layer on the back side made of recycled polyolefin fibers are laminated and integrated. ] The delivery goods storage bag as described in].
[10] The delivery product storage bag according to [9], wherein the virgin fiber layer is a fiber layer having a thickness of 1.0 mm or less, and the recycled fiber layer is a fiber layer having a thickness of 1.0 mm or less.
[11] The delivery product storage bag according to [9] or [10], wherein the content of the recycled polyolefin fiber is 10 to 90% by mass based on the mass of the nonwoven fabric sheet.
[12] The delivery product storage bag according to any one of [9] to [12], wherein the virgin fiber layer is made of virgin polypropylene fiber, and the recycled fiber layer is made of recycled polypropylene fiber.
[13] The nonwoven fabric sheet is made of a polypropylene nonwoven fabric, the yarn is made of a polypropylene continuous filament, and the hook-and-loop fastener is a polypropylene hook-and-loop fastener, and any one of [1] to [12] Delivery goods storage bag as described in the item.
[14] The delivery product storage bag according to any one of [1] to [12], wherein an inner surface of the delivery product storage bag is coated with polyolefin or a polyolefin film is adhered.
[15] A bag collection step of collecting the delivery product storage bag according to any one of used [1] to [14] from its delivery destination;
A bag disassembling process in which the printed ink layer on the surface of the collected delivery bag is removed from the bag body, and then the delivery bag is cut into small pieces to separate the fibers constituting the nonwoven into a nonwoven material. When,
A sheet manufacturing process for manufacturing a recycled nonwoven fabric sheet by making a nonwoven fabric sheet recycled from the obtained nonwoven material, or by laminating and integrating the recycled nonwoven fabric and the virgin nonwoven fabric,
A bag sewing process that cuts the recycled nonwoven sheet and sews it into a bag shape to create a recycled delivery product storage bag,
A method for recycling / reusing a delivery product storage bag, comprising a delivery process of packing delivery product in a recycled delivery product storage bag and providing the delivery product to the delivery destination.
[16] The bag disassembling step includes a deinking step of removing the printed ink layer on the surface of the delivery product storage bag from the bag body before cutting the collected delivery product storage bag into strips. [15] A method for recycling / reusing a delivery product storage bag according to [15].
[17] In the deinking step, the delivery product storage bag is immersed in warm water or alkaline water, and at that time, the printing ink layer is removed from the bag body by dissolving the polymer region in warm water or alkaline water. The method for recycling / reusing a delivery product storage bag according to [16], which is a process.
[18] The method for recycling / reusing a delivery product storage bag according to [17], wherein, in the deinking step, vibration is applied to the delivery product storage bag immersed in warm water or alkaline water.
Among these, the embodiments described in the following <1> to <6> are preferable.
<1> A delivery product storage bag having a bag lower portion having a bottom portion extending in a linear shape, left and right bag side portions folded inward and having gussets, and a bag upper portion in which a delivery product outlet is formed. And
The nonwoven sheet is cut, sewn into a bag shape using a thread, and a hook-and-loop fastener is attached to the nearby bag surface so as to close the delivery / removal port,
The nonwoven fabric sheet is a nonwoven fabric sheet in which a virgin fiber layer on the front side made of virgin polypropylene fibers and a recycled fiber layer on the back side made of recycled polypropylene fibers are laminated and integrated,
The yarn is made of a polypropylene continuous filament, and the hook-and-loop fastener is a hook-and-loop fastener made of polypropylene,
A printing ink layer is provided on the surface of the non-woven sheet of the bag, and less than 20 g for 100 g of water at 20 ° C. and 60 g or more for 100 g of water at 60 ° C. between the printing ink layer and the bag. A delivery product storage bag comprising a polymer region made of a polymer containing an acetoacetylated polyvinyl alcohol having a cross-linked structure having a solubility of 5%.
<2> The virgin fiber layer is a fiber layer having a thickness of 1.0 mm or less, and the recycled fiber layer has a thickness.
The delivery product storage bag according to <1>, which is a fiber layer of 1.0 mm or less.
<3> The delivered product storage bag according to <1> or <2>, wherein the content of the recycled polypropylene fiber is 10 to 90% by mass based on the mass of the nonwoven fabric sheet.
<4> The delivery product storage bag according to any one of <1> to <4>, wherein an inner surface of the delivery product storage bag is coated with polyolefin or a polyolefin film is adhered.
<5> A bag collection step of collecting the delivery product storage bag according to any one of <1> to <4> from the delivery destination;
A bag disassembling process in which the printed ink layer on the surface of the collected delivery bag is removed from the bag body, and then the delivery bag is cut into small pieces to separate the fibers constituting the nonwoven into a nonwoven material. When,
A sheet manufacturing process for manufacturing a recycled nonwoven fabric sheet by making a nonwoven fabric sheet recycled from the obtained nonwoven material, or by laminating and integrating the recycled nonwoven fabric and the virgin nonwoven fabric,
A bag sewing process that cuts the recycled nonwoven sheet and sews it into a bag shape to create a recycled delivery product storage bag,
A method for recycling and reusing a delivery product storage bag, including a delivery process in which a delivery product is packed in a recycled delivery product storage bag and provided to the delivery destination.
The bag disassembling step comprises a deinking step of removing the printing ink layer on the surface of the delivery product storage bag from the bag body before cutting the collected delivery product storage bag into strips,
The deinking step is a step of immersing the delivery product storage bag in warm water or alkaline water, and removing the printing ink layer from the bag body by dissolving the polymer region in warm water or alkaline water. ,
How to recycle / reuse the delivery bag.
<6> The method for recycling / reusing a delivery product storage bag according to <5>, wherein in the deinking step, vibration is applied to the delivery product storage bag immersed in warm water or alkaline water.

In the delivery product storage bag of the present invention, all parts such as the bag body, the thread used for sewing, and the hook-and-loop fastener are made of a polyolefin material, so that the troublesome work of separating them during recycling can be omitted.
Moreover, since the delivery goods storage bag of this invention is lightweight and can also be folded compactly, it is very suitable for storage and carrying of the bag after taking out goods from a delivery goods storage bag after goods delivery.
Furthermore, according to the present invention, even if printing is performed on a delivery product storage bag such as a logo, the printing ink layer is formed by interposing a polymer region having high hot water solubility between the printing ink layer and the bag. A delivery product storage bag is provided that can be easily removed from the bag.
In addition, in the delivery bag of the present invention, a recycled nonwoven fabric sheet in which a virgin polyolefin layer made of virgin polyolefin fibers and a recycled fiber layer made of recycled polyolefin fibers are laminated and integrated is used. Thus, even if no special means is added to the recycled polyolefin fiber regenerated from the used nonwoven fabric, the same surface appearance as that of the nonwoven fabric sheet using 100% virgin fiber is obtained, and the recycled polyolefin fiber alone is not sufficient. Sufficient strength can be sufficiently compensated. Therefore, it is possible to easily provide a delivery product storage bag made of a nonwoven fabric sheet having a required strength and a good surface appearance while reusing a used nonwoven fabric.
Moreover, since the delivery goods storage bag of this invention is comprised with the polyolefin nonwoven fabric sheet which can be reproduced | regenerated easily, by collecting used delivery goods storage bags and removing printing ink layers, such as a logo, from a bag main body. A new delivery product storage bag can be easily re-produced using the used delivery product storage bag from which the printing ink layer has been removed as a raw material. Therefore, according to the present invention, it is much easier to recycle the delivery product storage bag in order to create a circulation of collection, reproduction, and reuse.

1A and 1B are perspective views illustrating a delivery product storage bag according to a first embodiment of the present invention. 2A to 2D are perspective views illustrating a delivery product storage bag according to a second embodiment of the present invention. FIG. 3 is a diagram for explaining a method for recycling / reusing a delivery product storage bag according to the present invention. The delivery process of a product using this bag (FIG. 4A) and the regeneration process of the delivery product storage bag. (FIG. 4B). 4A to 4H are schematic views illustrating the manufacturing process of the delivery product storage bag 1 of the first embodiment. FIG. 5 is an enlarged view of the A-A ′ cross section including the printed layer of the delivery product storage bag 1 of the first embodiment. FIG. 6 is a schematic diagram illustrating a process of forming the printing ink layer 13 of the delivery product storage bag 14. FIG. 7 is a schematic diagram illustrating the process of forming the printing ink layer 16 of the delivery product storage bag 18. 8 (I) to (III) are enlarged views of regenerated nonwoven fabric sheets 22A to 22C.

Prior to this application, the present inventors have proposed a reproducible shopping bag made of non-woven fabric (Patent Document 1 and Patent Document 2).
Therefore, the present inventors have worked on the development of a delivery product storage bag that solves the above-mentioned problems by making some improvements based on this technology.
Its development has sufficient strength as a delivery bag, and promotes the complete recycling of collection, reproduction and reuse in addition to the performance of the bag itself, which is lightweight and compact and suitable for storage and carrying. The aim is to provide a shipping bag that can be delivered.
The details will be described below.
(1) Removal of printing ink surface In general, each retailer's own logo mark or the like is printed on the bags and cardboard boxes that have been used in the past. Since the logo mark functions to identify and promote advertisements for each retail store, it is assumed that the retail store prints the logo mark or the like on a delivery bag for reuse. However, when a logo mark or the like is printed on bags made of a conventional nonwoven fabric, it is necessary to remove the printing ink in order to regenerate the nonwoven fabric that is the base material of the bags.
(2) Utilization of recycled non-woven sheet In recent years, it has become an important issue to deal with the problem of global environmental conservation, promote effective use including the limited reuse of resources, and reduce fossil resource consumption. As described above, various technologies related to effective use of resources have been proposed from the viewpoint of environmental conservation.
For example, a nonwoven fabric made of cellulose fiber and synthetic fiber derived from waste paper pulp (Patent Document 3), a regenerated diaper and a regenerated urine removing pad in which a polymer-absorbing polymer layer and a sheet-like pulp in which linear regenerated pulp is mixed with virgin pulp are laminated (Patent Document 4), characterized in that a virgin fiber layer and a recycled fiber layer mainly composed of a pulverized product (recycled material pulverized product) of a fiber product adjacent to the virgin fiber layer are integrated. Various techniques such as fiberboard (Patent Document 5) have been proposed.
However, there is no description regarding the nonwoven fabric which recycled synthetic fiber in the said patent document 3, In patent document 4, when recycled pulp and virgin pulp are mixed, sufficient intensity | strength is not obtained by the quality of the recycled pulp to be used. There are problems such as color unevenness and inferior printability. Patent Document 5 specifically describes a fiber sheet such as an automobile carpet (floor mat), which is recycled into a hard sheet (semi-rigid to hard). ), And there is no detailed description or examples regarding fiberboards such as thin and soft sheets.
Thus, although various technologies have been proposed from the viewpoint of effective use of resources, the recycled nonwoven fabric has insufficient strength and requires a surface appearance with respect to the recycling of the nonwoven fabric. It is necessary to perform various treatments on the used nonwoven fabric because it does not meet the standards, and the actual situation is that reuse is not sufficiently developed from the viewpoint of its complexity and profitability.

And the present inventors interpose a polymer region (printing ink removal region) having high hot water solubility between the surface of the delivery product storage bag (nonwoven fabric sheet) and the printing ink layer printed thereon. Thus, it has been found that the printing ink layer containing the pigment can be easily removed from the bag and the problem (1) can be solved.
Also, a recycled nonwoven fabric sheet having the required strength and good surface appearance by laminating and integrating a virgin fiber layer on the front side made of virgin polyolefin fiber and a recycled fiber layer on the back side made of recycled polyolefin fiber Has been found to be able to be easily provided at low cost, and the problem (2) can be solved, and the present invention has been completed.
Hereinafter, the delivery goods storage bag and its recycling / reusing method according to the present invention will be described in detail.

<Delivery storage bag>
The delivery product storage bag of the present invention cuts a nonwoven fabric sheet made of polyolefin nonwoven fabric, sews it into a bag shape using a thread, and attaches a hook-and-loop fastener to the bag surface in the vicinity of the opening so that the opening of the bag can be closed. The delivery product storage bag is attached to the fabric, wherein the yarn and the hook-and-loop fastener are made of the same polyolefin material as that of the nonwoven fabric sheet.
The delivery product storage bag of the present invention has a bag-like shape, and as a specific example thereof, as shown in FIG. It is a bag which has the right and left bag side part which has a gusset. On the surface of the bag in the vicinity of the opening of the bag, in order to prevent the delivery item stored in the delivery item storage bag from being lost, a delivery item loading / unloading port to which a hook-and-loop fastener is attached as a sealing means is provided.
Moreover, the pocket of a delivery slip etc. may be provided in the bag surface of the delivery goods storage bag. The pocket is not particularly limited to a specific resin material such as a nonwoven fabric sheet or a transparent resin sheet.

<Nonwoven fabric sheet>
In the delivery product storage bag of the present invention, a polyolefin nonwoven fabric sheet is used as a material from the viewpoint of ease of recycling, strength, moldability, and the like. For example, a polyethylene nonwoven fabric sheet or a polypropylene nonwoven fabric sheet is used. Especially, the nonwoven fabric sheet which consists of a polypropylene nonwoven fabric with easy reproduction | regeneration is preferable.

  The nonwoven fabric sheet used in the delivery product storage bag of the present invention is lightweight, and can be folded compactly, and can be easily re-deployed after being folded back to its original shape. It is excellent in temporary hold and storage during use and portability such as carrying. Further, as described above, the delivery product storage bag does not need to be separated and separated by using the same polyolefin material in the nonwoven fabric sheet, the thread used for sewing, and the hook-and-loop fastener, as described above, and can be directly used in the recycling process. Therefore, it is very easy to recycle the delivery bag.

The non-woven fabric sheet dispersed in the present invention may be either an unregenerated non-woven fabric sheet made of virgin polyolefin fibers or a regenerated non-woven fabric sheet containing regenerated polyolefin fibers.
Moreover, the said nonwoven fabric sheet used for this invention can use a non-colored thing or the thing dye | stained by dyeing methods, for example, beam dyeing, liquid dyeing, dipping, etc., for a non-woven fabric dyeing technique. In the case of recycling the delivery bag of the present invention manufactured using the dyed non-woven sheet by recycling, the collected bag material is newly collected without being discolored by separating and collecting by color and regenerating each. New delivery bag can be reproduced.

<Regenerated nonwoven sheet>
In the delivery goods storage bag of this invention, Preferably, the nonwoven fabric sheet reproduced | regenerated as the said nonwoven fabric sheet is used.
The recycled nonwoven fabric sheet only needs to contain recycled polyolefin fibers. For example, a nonwoven fabric sheet composed of 100% recycled polyolefin fibers, a nonwoven fabric sheet composed of mixed fibers of virgin polyolefin fibers and recycled polyolefin fibers, or virgin poly Examples thereof include a nonwoven fabric sheet in which a fiber layer made of olefin fibers and a fiber layer made of fibers containing recycled polyolefin fibers are laminated.
As the material (raw material), the recycled nonwoven fabric sheet is made of polyolefin, such as polyethylene or polypropylene, or a nonwoven fabric mixed with them. It is particularly preferable to use polypropylene that can be easily recycled as a single material. By adopting such a configuration, that is, by applying a material that can be easily recycled, the delivery product storage bag of the present invention using the recycled nonwoven sheet is recovered after use, recycled, and reused. Recycling to make is easy.

In the present invention, preferably, a recycled nonwoven fabric sheet is used in which a virgin fiber layer on the front side made of virgin polyolefin fibers and a recycled fiber layer on the back side made of recycled polyolefin fibers are laminated and integrated.
As the regenerated fiber constituting the regenerated fiber layer, a regenerated fiber obtained by crushing and opening a used polyolefin nonwoven fabric into a recyclable fiber is used. The regenerated fiber layer may use a combination of regenerated fiber and virgin fiber from the viewpoint of improving strength, but it is preferable to use more regenerated fiber from the viewpoint of effective use of resources.
As the virgin fibers constituting the virgin fiber layer, synthetic fibers produced by fiberizing from a polypropylene resin or according to a conventional polymerization method for polypropylene fibers are used. In the fibers of the virgin fiber layer, other commonly used additives such as a matting agent, a heat stabilizer, a pigment, a deodorant, an antibacterial agent, an acaricide, Additives such as fungicides and fragrances can be added.

The thickness of the virgin fiber layer and the regenerated fiber layer is preferably 1.0 mm or less, particularly preferably 0.2 to 0.5 mm. When producing the delivery bag of the present invention from the regenerated nonwoven sheet, the thicknesses of the virgin fiber layer and the regenerated fiber layer are preferably 0.2 to 0.4 mm, respectively.・ A recycled nonwoven sheet having a tear strength cannot be obtained, and when it is thicker than 0.4 mm, a sufficient tensile / tear strength is obtained, but the thickness of the recycled nonwoven sheet is increased, and as a delivery product storage bag, It becomes bulky and is not suitable for storage or carrying.
The recycled polyolefin fiber content in the recycled nonwoven fabric sheet may be 1% by mass or more, preferably 5 to 60% by mass, more preferably 10 to 45% by mass, and particularly preferably 15 to 35% by mass. . From the viewpoint of effective use of resources, it is preferable to use more recycled polyolefin fibers, but if the content of recycled polyolefin fibers exceeds the above upper limit, sufficient strength cannot be obtained, resulting in problems in product performance. It is not preferable. This content rate can be set in an optimum range in consideration of application characteristics of the recycled nonwoven sheet, strength as the recycled nonwoven sheet, and the like.

The front and back layers of the regenerated nonwoven sheet are each obtained using a known method, and as a production method and a lamination method, a conventionally known method for laminating a nonwoven fabric can be arbitrarily adopted, and there is no particular limitation. Absent.
As the regenerated fiber layer composed of regenerated polyolefin fibers, a method of crushing and opening used nonwoven fabrics by a conventional method is used.
On the other hand, as the virgin fiber layer, either short fibers or long fibers may be used. As a method for forming the virgin fiber layer, a direct spinning method represented by a spunbond method and a melt blow method, or a dry method such as carding or air laying is used. Any method such as a wet method such as a papermaking method may be used.
Further, as a method of bonding or entanglement of the virgin fiber layer and the recycled fiber layer, a thermal bonding method such as a calender method or a through air heating method, a nonwoven fabric layer composed of a water-absorbing nonwoven fabric layer and a thermoplastic resin using an adhesive. Any method such as a chemical bonding method, a needle punching method, a hydroentanglement method, a mechanical bonding method such as a stitch bonding method may be used.

  The regenerated non-woven sheet may be uncolored or may be dyed by a conventional non-woven dyeing technique such as beam dyeing, liquid dyeing or dipping. By coloring the virgin fiber layer formed on the surface of the regenerated non-woven sheet, the appearance of the regenerated non-woven sheet without changing the regenerated fiber layer is the color of the virgin fiber layer colored to the desired color. It can be presented.

<Polymer region intervening between delivery bag surface and printing ink layer>
The polymer region does not dissolve in low-temperature water from the viewpoint that it is required that the delivery product storage bag of the present invention does not change due to dissolution and separation of the printing ink layer even when it is wet. In order for the molecular region to be easily separated from the surface of the nonwoven fabric sheet, the polymer region has a property of being easily dissolved when contacted (immersed) in high-temperature water at 60 ° C. or higher. Is required. Accordingly, the polymer satisfying these requirements preferably has a solubility of less than 20 g with respect to 100 g of water at 20 ° C. and 60 g or more with respect to 100 g of water at 60 ° C.

（式中、０≦ｌ≦１、０≦ｍ≦１、０≦ｎ≦１、０．８≦ｌ＋ｍ＋ｎ≦１）で表される構造を含むアセトアセチル化ポリビニルアルコール（ｌ、ｍ及びｎは各構造のモル比を表す。この高分子はランダム重合体であってよく、またブロック重合部分を有していてもよい。）を架橋剤と重合することによって得られる変性ポリビニルアルコールが好ましい。市販品としては、例えばゴーセファイマーＺ−２００、Ｚ−４１０（日本合成化学工業（株）製）が好ましい。 Further, in the present invention, polyvinyl alcohol is a polymer having a property such that it is easily dissolved in the above-mentioned specific water resistance, that is, easily dissolved in high-temperature water of 60 ° C. or higher, but difficult to dissolve in low-temperature water such as room temperature water. Preferably used.
The polyvinyl alcohol used for the delivery bag of the present invention is not particularly limited as long as it has the above water resistance, and has various modifying groups such as an alkoxy group, an ester group, and an alkylene ether group. Modified polyvinyl alcohol may also be used. The saponification degree is preferably 97.5 mol% or more. In particular, modified polyvinyl alcohol having a crosslinked structure obtained by polymerizing polyvinyl alcohol and a crosslinking agent is preferably used. Among them, for example, the following formula

(Wherein, 0 ≦ l ≦ 1, 0 ≦ m ≦ 1, 0 ≦ n ≦ 1, 0.8 ≦ l + m + n ≦ 1) acetoacetylated polyvinyl alcohol (l, m and n are each This represents a molar ratio of the structure.This polymer may be a random polymer and may have a block polymerization portion.) Modified polyvinyl alcohol obtained by polymerizing with a crosslinking agent is preferred. As a commercially available product, for example, Goseifamer Z-200 and Z-410 (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) are preferable.

The cross-linking agent used in the delivery bag of the present invention is not particularly limited as long as it is a compound that can impart water resistance as described above by cross-linking polyvinyl alcohol. For example, a polyvalent metal compound, a boron compound Amine compounds, hydrazine compounds, silane compounds, methylol group-containing compounds, aldehyde group-containing compounds, epoxy compounds, thiol compounds, isocyanate compounds, and the like can be used. These may be used alone or in combination of two or more. As commercially available products, for example, Glyoxal GX (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.), Sumimar M-30W (manufactured by Sumitomo Chemical Co., Ltd.), and Hilink DM (manufactured by Clariant) are preferred.
The cross-linking agent is more than 0.1% by mass and less than 2.0% by mass, preferably more than 1.0% by mass and less than 1.5% by mass, and more preferably more than 0.5% with respect to the mass of polyvinyl alcohol. It is added in an amount of 1.0% by mass or less. If the addition amount of the cross-linking agent is less than the lower limit of the above range, the degree of cross-linking is insufficiently lowered, so that the desired water resistance against normal temperature water and high temperature water cannot be obtained, and the addition amount is above the above range. When the amount is limited, particularly more than 2.0% by mass, the degree of crosslinking becomes considerably high, so that the water resistance against normal temperature water becomes high and the water resistance against high temperature water becomes too high, and easily dissolves in high temperature water at 60 ° C. or higher. However, the water resistance required for the polymer region of the present invention, which is difficult to dissolve in low temperature water such as room temperature water, cannot be obtained.

  The acetoacetylated polyvinyl alcohol used in the delivery bag for the delivery of the present invention is preferably acetoacetylated polyvinyl alcohol. As a method for this, polyvinyl alcohol is dispersed in an acetic acid solvent, and diketene is added thereto. A method in which polyvinyl alcohol is dissolved in a solvent such as dimethylformaldehyde or dioxane in advance and diketene is added thereto, or a method in which diketene gas or liquid diketene is brought into direct contact with polyvinyl alcohol is preferably used.

また、分子内にアセトアセチル基を有するポリビニルアルコールと、架橋剤としてアルデヒド基含有化合物とを反応させた場合、下記のような架橋構造を形成する。

また、分子内にアセトアセチル基を有するポリビニルアルコールと、架橋剤としてメチロール基含有化合物とを反応させた場合、下記のような架橋構造を形成する。

また、分子内にアセトアセチル基を有するポリビニルアルコールと、架橋剤として多価金属化合物とを反応させた場合、下記のような架橋構造を形成する。

In the present invention, when a polyvinyl alcohol having an acetoacetyl group introduced into the side chain is reacted with an amine compound as a crosslinking agent, the following crosslinked structure is formed.

Moreover, when the polyvinyl alcohol which has an acetoacetyl group in a molecule | numerator and the aldehyde group containing compound as a crosslinking agent are made to react, the following crosslinked structures are formed.

Moreover, when the polyvinyl alcohol which has an acetoacetyl group in a molecule | numerator and the methylol group containing compound as a crosslinking agent are made to react, the following crosslinked structures are formed.

Moreover, when the polyvinyl alcohol which has an acetoacetyl group in a molecule | numerator and the polyvalent metal compound as a crosslinking agent are made to react, the following crosslinked structures are formed.

  In addition, since the acetoacetylated polyvinyl alcohol having the above-mentioned crosslinked structure has the property of being hardly soluble in acid and easily soluble in strong alkalinity, in addition to high-temperature water at 60 ° C. or higher, for example, alkaline water such as sodium hydroxide aqueous solution is used. It can be easily dissolved by use.

The polymer region may be formed by, for example, ironing a polymer having high hot water solubility in the form of a film to the surface of the delivery bag (nonwoven fabric sheet surface) by heat fusion. Is formed on the bag surface (on the nonwoven sheet surface). Alternatively, the polymer region may be formed by, for example, applying or spraying an aqueous solution of the polymer on the bag surface (nonwoven sheet surface) and drying the polymer within the bag surface (nonwoven sheet surface). It is formed by impregnation.
When a polymer is laminated on the surface of the delivery product storage bag (nonwoven fabric sheet surface), a polymer region having a sufficient thickness is formed between the bag and the printing ink layer. Can be easily separated. On the other hand, when a polymer is impregnated in the bag surface (in the nonwoven fabric sheet surface), the adhesion of the polymer in the bag is increased, so that the appearance is also beautiful.

In addition, the delivery product storage bag of the present invention is printed on the surface of the bag depending on the intended use and the like, for example, a logo mark or the like unique to each retail store is printed. The logo mark that performs the function of identifying each retail store and the function of advertising is printed on the surface of the bag through the polymer region formed by the method described above.
The printing method is not particularly limited as long as it is a method conventionally used for printing on nonwoven fabrics, and may be any of letterpress printing, gravure printing, offset printing, silk screen printing, transfer printing, and the like. Of these, silk screen printing is preferred because printing is possible regardless of thickness, size, plane, and curved surface.
When printing on the delivery product storage bag, a pre-printed film may be ironed to the surface of the delivery product storage bag, or the film may be ironed to the bag surface and printed from above. Alternatively, the surface of the bag impregnated with a polymer solution may be printed.

  In the delivery product storage bag of the present invention, the delivery product storage bag is heated to a predetermined temperature or higher by interposing a polymer region having high hot water solubility between the bag (nonwoven fabric sheet) and the printing ink layer. By soaking, the polymer region is dissolved in warm water, and the printing ink layer can be easily separated from the surface of the bag (nonwoven fabric sheet). At this time, by applying vibration, particularly ultrasonic vibration, to the delivery product storage bag immersed in warm water, the printing ink layer is further easily peeled off from the bag (nonwoven fabric sheet). Further, the printing ink constituting the separated printing ink layer is generally insoluble in water and does not dissolve even in warm water, so that only the printing ink layer can be easily removed from the warm water. In addition, when separating the printing ink layer from the delivery product storage bag of the present invention, only water is used without using an organic solvent, which has an impact on the health of the worker and further on the environment such as soil contamination. There is no effect.

<Delivery storage bag>
As described above, the delivery product storage bag of the present invention is characterized in that the nonwoven fabric sheet, the thread used for sewing, and the hook-and-loop fastener are all made of the same polyolefin material. And it is preferable that the said nonwoven fabric sheet consists of a nonwoven fabric sheet made from a polypropylene.
Therefore, the delivery product storage bag of the present invention is most preferably configured using a nonwoven fabric sheet made of polypropylene nonwoven fabric, a thread made of polypropylene continuous filament, and a hook-and-loop fastener made of polypropylene.
The delivery product storage bag of the present invention may be coated with polyolefin or adhered with a polyolefin film for the purpose of improving the strength of the bag or improving water resistance (water repellency). May be.

<Recycling and reuse of delivery bag>
The method for recycling / reusing a delivery bag according to the present invention includes the following steps (1) to (6).
(1) A bag collection step for collecting a used delivery product storage bag from its delivery destination. (2) A printing ink layer on the surface of the collected delivery product storage bag is removed from the bag body, and then the delivery product is stored. A bag dissociation process in which a bag is cut into small pieces and fibers constituting the nonwoven fabric are separated to produce a nonwoven material. (3) A sheet of recycled nonwoven fabric is made from the obtained nonwoven material, or the recycled nonwoven fabric and virgin nonwoven fabric Sheet manufacturing process to manufacture recycled nonwoven sheet by stacking and unifying (4) Cutting the recycled nonwoven sheet and sewing it into a bag shape to create a recycled delivery product storage bag Process (5) A delivery process in which a delivery product is packed in a recycled delivery product storage bag and provided to the delivery destination.

The (2) bag disassembling step preferably includes a deinking step of removing the printing ink layer on the surface of the delivery goods storage bag from the bag body before cutting the collected delivery goods storage bag into strips. Prepare.
The deinking step is a step of removing the printing ink layer from the bag body by immersing the delivery product storage bag in warm water or alkaline water, and dissolving the polymer region in warm water or alkaline water. Preferably, it is a step characterized by applying vibration to a delivery product storage bag immersed in warm water or alkaline water.

A method for recycling and reusing products using the delivery product storage bag of the present invention will be described with reference to FIG. 4A is a product delivery process using the storage bag, and FIG. 4B is a regeneration process of the storage bag.
First, the seller who received the delivery notification of the product from the customer puts the product in the delivery product storage bag of the present invention and delivers it to the customer. Then, after delivering the merchandise to the customer, the emptied delivery product storage bag is taken back to the delivery company and used for delivery to the customer again.
As described above, when the delivery goods storage bag of the present invention is used for delivery of goods a plurality of times and the delivery goods storage bag is damaged or becomes dirty, the delivery goods storage bag is collected in a recycling factory.
The collected used delivery bag is used by first removing the printing ink layer from the nonwoven fabric sheet when the logo or the like is printed, and then cutting the bag. The fiber is recovered through the decomposition process.
And the nonwoven fabric sheet is regenerated using the nonwoven fabric material (fiber) obtained through the bag disassembling step, and the delivery goods storage bag is regenerated using the regenerated sheet.
The recycled delivery product storage bag is delivered again to the delivery company, and the product is put in the bag and used for delivery to the customer.

<Molding method for delivery bag>
Although the delivery goods storage bag of this invention is shape | molded by the following method, for example, it can shape | mold also by different methods other than the following.
In the method for forming a delivery product storage bag according to the present invention, a non-woven sheet having a rectangular shape is prepared, the non-woven sheet is folded so that one short side overlaps the other short side, and then the left and right lengths are overlapped. The side part of the sewing machine bag is formed with a thread made of the same material as the bag body. Subsequently, the left and right side portions of the bag that are sewn are folded inward by a length that provides a gusset on the bag body, and the lower end of the fold portion and the bottom side that overlaps with the sewing machine are sewn with the thread. Forming a bag side portion and a bag lower portion. And the delivery goods storage bag of this invention is obtained by turning over the bag body obtained in this way.
Then, a hook-and-loop fastener is attached to the bag surface in the vicinity of the opening of the bag body (delivery item loading / unloading port) as a bag closing means to prevent loss of the product. Further, if desired, a pocket for storing a delivery slip or the like may be provided on the bag surface of the delivery product storage bag. These parts are preferably sewn from the viewpoint of increasing the strength of the bag.
In the delivery product storage bag of the present invention, the bag body, thread and other parts are all made of the same material, so that the troublesome work of separating them during recycling can be omitted.

Example 1
Hereinafter, the present invention will be described in more detail with reference to the drawings. FIGS. 1A and 1B are perspective views illustrating a delivery product storage bag according to an embodiment of the present invention. FIG. 1A illustrates a case where a delivery product entry / exit port is opened. ) Shows the case where the delivery bag is closed by the hook-and-loop fastener.

As shown in FIG. 1 (a), a delivery product storage bag 1 of the present invention includes a bag lower part 8 having a bottom part 7 which extends in a linear shape, and left and right bag side parts which are folded inward and have gussets 9. 10 and a bag upper part 11 in which a delivery product insertion / removal port 3 to which a pair of hook-and-loop fasteners 4 a and 4 b are attached is formed, and is formed using a nonwoven fabric sheet 2. Further, in order to improve the strength of the delivery product storage bag 1, a sewing portion 6 is provided along the outer periphery of the bag side portion 10.
The hook-and-loop fasteners 4a and 4b can block the delivery / removal port 3 as shown in FIG.
Moreover, the pocket 5 which can store a delivery slip etc., the logo, the mark, etc. for recognizing a retail store or a delivery company may be printed on the bag surface of the delivery goods storage bag 1 (refer printing ink layer 13). ).
The delivery product storage bag 1 does not tear or tear the bag from the joint of the bag side portion 10 even when many products or heavy products are put in, and the load limit and the allowable volume of the contents to be packed in the bag are not limited. significantly can be improved, therefore shipping articles containing bag 1 of the present invention may be used repeatedly put heavy items Ya bulky items, usually 5 times or more, can be used repeatedly time takes about 25 to 30 times . Further, since the polyolefin nonwoven fabric sheet 2 is lightweight and can be folded compactly, and can be easily re-deployed after being folded back to its original shape, the delivery bag 1 of the present invention is not used. It is excellent for temporary storage and storage and is very suitable for carrying.

Example 2
FIGS. 2A to 2D are perspective views illustrating another embodiment of the delivery product storage bag of the present invention.
In the present embodiment, a pocket 5 and a printing ink layer 13 such as a logo may be provided on the bag surface opposite to the bag surface of the delivery product storage bag 1 shown in the first embodiment (FIG. 1A) (see FIG. 1). 2 (a)).
Further, as shown in FIG. 2 (b), by attaching a pair of hook-and-loop fasteners 23a and 23b to the delivery product loading / unloading port 3 and the bag surface (the nonwoven fabric sheet 2 surface) of the delivery product storage bag 1, FIG. As shown in c), the delivery item storage bag 1 can be bent and fixed at a side parallel to the delivery item insertion / removal port 3. As a result, it is possible to further prevent the loss of the delivery product, and the size of the delivery product storage bag 1 can be reduced, so that it can be carried when the delivery product storage bag 1 is taken home after delivery, and temporarily held and stored when not in use. It will be excellent.
Further, as shown in FIG. 2D, in the pocket 5 that can store the delivery slip and the like, the pocket lid 24 is provided to prevent the delivery slip and the like from jumping out. By providing, it is possible to easily take out a delivery slip or the like.

Example 3
FIG. 3 is a diagram showing an embodiment of the method for recycling / reusing the delivery bag.
<FIG. 3 (A): Product delivery process using delivery product storage bag>
First, the seller who received the delivery notification of the product from the customer puts the product in the delivery product storage bag of the present invention and delivers it to the customer. Then, after delivering the merchandise to the customer, the emptied delivery product storage bag is taken back to the delivery company and used for delivery to the customer again. The delivery goods storage bag of this invention can endure the use at the time of delivery about 25-30 times.
<FIG. 3B: Regeneration process of the storage bag>
When the delivery product storage bag is damaged or becomes dirty, the bag is collected in a recycling factory.
The collected used delivery product storage bag collects fibers through a bag decomposition process such as removing the printing ink layer and cutting the bag (bag decomposition process). Next, a nonwoven fabric sheet is produced again using the obtained nonwoven fabric material (fiber) (sheet production process). And the delivery goods storage bag is sewn using this recycled nonwoven fabric sheet (bag sewing process).
Finally, the recycled delivery product storage bag is delivered again to the delivery company, and the product is put in the bag and reused for delivery to the customer.

[Bag disassembly process]
The bag disassembling step includes a deinking step for removing the printing ink layer before the collected delivery bag is cut into strips.
A specific example of the deinking process is as follows (hereinafter described using the delivery product storage bag 1 of Example 1). That is, the delivery product collection bag 1 manufactured in the [bag sewing step] described later is placed in a hot water tank maintained at 65 ° C. and immersed for about 3 minutes while being subjected to ultrasonic vibration, thereby delivering the delivery product storage bag. it was possible to separate the printing ink layer 1 3 1 surface. The delivery product storage bag 1 from which the printing ink layer 13 has been separated is taken out of the hot water tank, and the separated printing ink has a specific gravity greater than that of water, so that it sinks to the bottom of the hot water tank, and the printing ink can be easily removed from the hot water tank. I was able to take it out.
The delivery product storage bag 1 from which the printing ink layer 13 has been removed in this manner is cut into non-woven fabric strips using a cutting device or the like, and the non-woven fabric is opened with a known opening machine to collect recycled fibers.

[Sheet manufacturing process]
As one specific example of the sheet production process, Production Examples 1 to 3 of the recycled nonwoven fabric sheets 22A to 22C are shown. In addition, in FIG. 8, the enlarged view of the cross section of the reproduced nonwoven fabric sheets 22A-22C is shown.
(Production Example 1: Regenerated nonwoven sheet 22A)
Polypropylene resin (PP) is supplied to a conventional spunbond melt spinning apparatus, melted and mixed uniformly at 230 ° C., melt spun from a spinneret having a spinning hole having a circular cross section, and taken up at a speed of 3000 m / min. A 2 dtex polypropylene fiber was obtained. The obtained virgin polypropylene fiber was spread and dispersed to form a web having a basis weight of 30 g / m ² .
Next, as shown in the above-mentioned [Bag Disassembling Step], the used polypropylene nonwoven fabric was opened with a known opening machine to form a web made of recycled fibers.
The resulting web made of virgin fibers and the web made of regenerated fibers were partially thermocompression bonded at a linear pressure of 45 N / cm between a pinpoint embossed (crimp area ratio 7.1%) roll heated to 135 ° C. and a flat roll. A recycled nonwoven fabric sheet 22A having a weight of 60 g / m ² was prepared. The content of the recycled fiber is 20% by mass in the recycled nonwoven fabric sheet.
(Production Example 2: Regenerated nonwoven sheet 22B)
In the same manner as in Production Example 1, a recycled nonwoven fabric sheet 22B containing 30% by mass of recycled fibers in the recycled nonwoven fabric sheet was prepared.
(Production Example 3: Regenerated Nonwoven Sheet 22C)
In the same manner as in Production Example 1, a recycled nonwoven fabric sheet 22C containing 40% by mass of recycled fibers in the recycled nonwoven fabric sheet was prepared.

[Bag sewing process]
As a specific example of the bag sewing process, the bag sewing process of the delivery product storage bag shown in Example 1 (a) is shown in FIGS. 4 (a) to 4 (h).
In the process illustrated in FIG. 4, an elongated rectangular polypropylene nonwoven fabric sheet 2 is prepared, and the nonwoven fabric sheet is folded so that one short side and the other short side are parallel (see FIG. 4B). At this time, it is preferable to fold the one short side part away from the other short side part so that a hook-and-loop fastener can be attached.
Then, the nonwoven fabric sheet 2 is sewn along the long side of the rectangle (in FIG. 4 (c), 6 indicates a sewing part) to form the bag side portion 10 of the delivery product storage bag 1 ( (Refer FIG.4 (c)).
Next, in order to provide the town 9 and the bottom portion 7 in the completed nonwoven fabric delivery bag 1, the sewn nonwoven fabric sheet 2 is folded inward (for example, along the line XX ′ in FIG. 4C), and the bottom The sewing machine is sewn along a line (line YY ′ in FIG. 4D) where the part 7 and the bag side part 10 are orthogonal to each other. Thereafter, the outer side sewn by the sewing machine may be cut as shown in FIG.
Next, the delivery goods storage bag 1 is turned over, and the hook-and-loop fasteners 4a and 4b are attached to the delivery goods entrance / exit 3 of the upper part 11 of the delivery goods storage bag 1 by sewing (FIG.4 (f)). Moreover, the pocket 5 which can store a delivery slip etc. is attached to the surface of the nonwoven fabric sheet 2 used as the outer surface of the delivery goods storage bag 1 by sewing (FIG.4 (g)). The strength of the delivery product storage bag 1 can be increased by sewing the sewing machine along the outer periphery of the bag side portion 10.
Further, a modified polyvinyl alcohol film 12 and a printing ink layer 13 are provided on the surface of the non-woven sheet 2 that is the outer surface of the delivery product storage bag 1 in order to display a logo or a mark for identifying a delivery company or the like (FIG. 4). (G) and (h)). 5 is an enlarged view of the AA ′ cross section (see FIGS. 1A and 4H) including the printing ink layer 13 of the delivery product storage bag 1. FIG.

Examples of a method for forming the modified polyvinyl alcohol film 12 and the printing ink layer 13 for displaying a logo or a mark on the surface of the nonwoven fabric sheet 2 that is the outer surface of the delivery product storage bag 1 include the following methods.
(I) The modified polyvinyl alcohol film 12 is superposed on the surface of the nonwoven fabric sheet 2 which is the outer surface of the delivery product storage bag 1, and the nonwoven fabric sheet 2 and the modified polyvinyl alcohol film 12 are bonded together by heat welding. Furthermore, the printing ink layer 13 is formed by carrying out silk screen printing from the top (refer FIG.4 (g), (h)).
The modified polyvinyl alcohol film 12 used here is about 2 in 100 g of water at 20 ° C.
Although only g is dissolved, about 80 g is easily dissolved in hot water at 60 ° C. Further, the modified polyvinyl alcohol film 12 is prepared such that Hilink DM (manufactured by Clariant) as a cross-linking agent is 1.0% by mass with respect to Gohsephimer Z-200 (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.). , And formed into a film having a thickness of about 40 μm.
(Ii) A modified polyvinyl alcohol film 17 having a printing ink layer 16 on the surface thereof is previously superposed on the surface of the nonwoven fabric sheet 15 which is the outer surface of the delivery product storage bag 14 by silk screen printing, and the nonwoven fabric sheet 15 is thermally welded by an iron. And the modified polyvinyl alcohol film 17 are bonded together (see FIG. 6).
The modified polyvinyl alcohol film 17 used here is the same as the modified polyvinyl alcohol film 12 of the above (i).
(Iii) After applying the modified polyvinyl alcohol aqueous solution 20 to the surface of the non-woven sheet 19 which is the outer surface of the delivery product storage bag 18 and evaporating the water, the printing ink is printed on the surface by silk screen printing. Layer 21 is formed (see FIG. 7).
The modified polyvinyl alcohol aqueous solution 20 used here is a mixture of Hilink DM (manufactured by Clariant) as a cross-linking agent so as to have a mass of 1.0 mass with respect to Goosephimer Z-200 (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.). Prepared.

<Recycle process of delivery bag>
A delivery product storage bag formed in the above-described procedure, used multiple times for delivery of goods, and recovered due to damage or the like (hereinafter described using delivery product storage bag 1 of Example 1) is set to 65 ° C. placed in kept warm water bath, was immersed for about 3 minutes while applying ultrasonic vibration, it was possible to separate the printing ink layer 1 3 from the surface of the shipping article storage bag 1. The temperature printing ink layer 13 from water tank removed shipments packaging bag 1, which is separated, the separated printing ink viewed precipitation to the bottom of the temperature aquarium from specific gravity greater than water, readily temperature water bath printing ink Was able to be taken out of.
In addition, as shown in FIG. 6, even if a modified polyvinyl alcohol film 17 that has been printed on the surface in advance is used, the printing ink layer 16 can be easily separated from the surface of the delivery bag 14 by the same method as described above. I was able to.
Furthermore, as shown in FIG. 7, also the modified polyvinyl alcohol 20 in a case where it is coated cloth, by the same method as described, it could be easily separated ink layer 21 from the delivery equipment container bag 18 surface.
Next, a new delivery product storage bag could be reproduced by regenerating and forming a nonwoven fabric from the delivery product storage bag from which the printing ink layer was removed.
Therefore, the delivery product storage bag could be recycled by the method of recycling and recycling the delivery product storage bag as shown in FIG.

1 Delivery goods storage bag 2 Polypropylene nonwoven sheet 3 Delivery goods entrance / exit (opening)
4a, 4b Surface fastener 5 Pocket 6 Sewing part 7 Bottom part 8 Bag lower part 9 Machi 10 Bag side part 11 Bag upper part 12 Modified polyvinyl alcohol film 13 Printed ink layer 14 Delivery goods storage bag 15 Non-woven sheet 16 Printed ink layer 17 Modified polyvinyl alcohol Film 18 Delivered product storage bag 19 Nonwoven fabric sheet 20 Modified polyvinyl alcohol aqueous solution 21 Printed ink layer 22A Regenerated nonwoven sheet 22B obtained in Production Example 1 Regenerated nonwoven sheet 22C obtained in Production Example 2 Obtained in Production Example 3 Recycled nonwoven fabric sheet a Virgin fiber layer b Regenerated fiber layer 23a, 23b Surface fastener 24 Pocket lid 25 Pocket hole

Japanese Patent No. 3876409 Japanese Patent No. 3995974 JP 2004-143611 A JP 2003-135521 A JP 2005-53035 A

Claims (6)

A delivery product storage bag having a bag lower portion having a bottom portion extending in a linear shape, left and right bag side portions folded inward and having a gusset, and a bag upper portion in which a delivery product outlet is formed,
The nonwoven sheet was cut, using a yarn sewn into a bag shape, and Ri Na attach the surface fastener to be closed the shipping articles loading and unloading opening in a bag surface in the vicinity,
The nonwoven fabric sheet is a nonwoven fabric sheet in which a virgin fiber layer on the front side made of virgin polypropylene fibers and a recycled fiber layer on the back side made of recycled polypropylene fibers are laminated and integrated,
The yarn is made of a polypropylene continuous filament, and the hook-and-loop fastener is a hook-and-loop fastener made of polypropylene,
A printing ink layer is provided on the surface of the non-woven sheet of the bag, and less than 20 g for 100 g of water at 20 ° C. and 60 g or more for 100 g of water at 60 ° C. between the printing ink layer and the bag. A delivery product storage bag comprising a polymer region made of a polymer containing an acetoacetylated polyvinyl alcohol having a cross-linked structure having a solubility of 5%. The delivery product storage bag according to claim 1 , wherein the virgin fiber layer is a fiber layer having a thickness of 1.0 mm or less, and the recycled fiber layer is a fiber layer having a thickness of 1.0 mm or less. The delivery product storage bag according to claim 1 or 2 , wherein a content of the recycled polypropylene fiber is 10 to 90% by mass based on a mass of the nonwoven fabric sheet. The delivery goods storage bag as described in any one of Claims 1 thru | or 4 formed by coating polyolefin on the inner surface of the delivery goods storage bag, or sticking a polyolefin film. A bag collection step of collecting the delivery bag according to any one of claims 1 to 4 from a delivery destination;
A bag disassembling process in which the printed ink layer on the surface of the collected delivery bag is removed from the bag body, and then the delivery bag is cut into small pieces to separate the fibers constituting the nonwoven into a nonwoven material. When,
A sheet manufacturing process for manufacturing a recycled nonwoven fabric sheet by making a nonwoven fabric sheet recycled from the obtained nonwoven material, or by laminating and integrating the recycled nonwoven fabric and the virgin nonwoven fabric,
A bag sewing process that cuts the recycled nonwoven sheet and sews it into a bag shape to create a recycled delivery product storage bag,
A method for recycling and reusing a delivery product storage bag, including a delivery process in which a delivery product is packed in a recycled delivery product storage bag and provided to the delivery destination .
The bag disassembling step comprises a deinking step of removing the printing ink layer on the surface of the delivery product storage bag from the bag body before cutting the collected delivery product storage bag into strips,
The deinking step is a step of immersing the delivery product storage bag in warm water or alkaline water, and removing the printing ink layer from the bag body by dissolving the polymer region in warm water or alkaline water. ,
How to recycle / reuse the delivery bag. 6. The method for recycling / reusing a delivery product storage bag according to claim 5 , wherein in the deinking step, vibration is applied to the delivery product storage bag immersed in warm water or alkaline water.

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