JP3074000U - Shopping bag - Google Patents

Abstract

(57) [Summary] [Problem] To provide a shopping bag that can be easily disassembled when put out as garbage after use. A shopping bag (A) comprises a water-soluble inner resin sheet (1) mainly composed of partially saponified polyvinyl alcohol and a microbial degradable outer resin sheet (2) mainly composed of aliphatic polyester and natural resin. It consists of three layers.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a shopping bag for putting goods and foods bought at supermarkets and convenience stores and taking them home.

[0002]

[Prior art]

 When shopping at supermarkets or convenience stores, consumers are given a plastic shopping bag, and consumers take their goods and foods home with them.

[0003]

[Problems to be solved by the invention]

 However, if you take it home and take out your shopping bags as garbage, incineration will generate toxic gas. In addition, it is not decomposed even if buried in soil and remains for many hours. This contributes to environmental pollution.

[0004] An object of the present invention is to provide a shopping bag which is easily disassembled when used and disposed of as garbage.

[0005]

[Means for Solving the Problems]

 [Claim 1] A shopping bag for putting goods and foods bought in a store and taking them home is formed of a biodegradable resin sheet. For this reason, when used and put out as garbage, it is easily decomposed and does not pollute the environment.

[0006] [Claim 2] A shopping bag for putting goods and foods bought in a store and taking them home is formed of a resin sheet mainly containing partially saponified polyvinyl alcohol. For this reason, if used and disposed of as garbage, it will be easily decomposed by water and will not pollute the environment.

[Claim 3] A sheet expressing a store name or a logo with characters or graphics is adhered to the surface of the resin sheet, and the sheet is a biodegradable resin sheet or partially saponified. It is a resin sheet containing polyvinyl alcohol as a main component. Since the sheet that expresses the store name and logo with characters and figures is adhered to the surface of the resin sheet, the store can be effectively promoted and the environment can be protected.

[0008] [Claim 4] A shopping bag for putting goods and foods bought at a store and taking it home is a three-layer structure in which a water-soluble or water-dispersible inner resin sheet is sandwiched between microbial degradable outer resin sheets. Consisting of The surface exposed inside and outside the shopping bag is a biodegradable outer layer resin sheet, so even if water is attached to products or food purchased at the store or water leaks from the product or food, the shopping bag Is not broken, and goods and foods do not fall. In addition, when used as waste after use, the outer resin sheet is decomposed by microorganisms and the inner resin sheet is decomposed by water, so that the environment is not polluted.

[Claim 5] The inner resin sheet mainly contains partially saponified polyvinyl alcohol, and the outer resin sheet mainly contains aliphatic polyester and natural resin. If the product or food purchased at the store has water on it, or if water leaks from the product or food, the shopping bag will not be broken and the product or food will not fall.

[0010] Further, when used and put out as garbage, the outer resin sheet mainly composed of aliphatic polyester and natural resin is decomposed by microorganisms, and the inner resin sheet mainly composed of partially saponified polyvinyl alcohol becomes water. It does not pollute the environment because it is decomposed.

[Claim 6] Since the outer resin sheet has a biodegradability or is a material mainly composed of an aliphatic polyester and a natural resin, the outer layer resin sheet has a store name and a logo expressed in characters and figures. It can be printed on the surface of the sheet. The promotion of the store is effective and the environment can be protected.

[0012]

[Embodiment of the invention]

 A first embodiment (corresponding to claims 1, 4, 5, and 6) of the present invention will be described with reference to FIGS. As shown in the figure, the shopping bag A has a three-layer structure in which an inner resin sheet 1 is sandwiched between outer resin sheets 2 and 3. Reference numeral 4 denotes a hand-carrying portion having a hole 41 for receiving a hand or an arm.

The inner layer resin sheet 1 is formed of a water-soluble resin having a degree of polymerization of 500 to 3000 and a saponification degree of 70 to 98 mol% and containing polyvinyl alcohol as a main component. As the polyvinyl alcohol, partially saponified polyvinyl acetate, polyvinyl alcohol modified with maleic acid, itaconic acid, or the like can be used.

When the degree of polymerization of polyvinyl alcohol is less than 500, the strength decreases, and when it exceeds 3,000, decomposition takes too long. On the other hand, if the saponification degree is less than 70 mol% or more than 98 mol%, the water solubility becomes poor. The thickness of the inner resin sheet 1 is preferably in the range of 0.3 mm to 1 mm in view of strength and decomposability.

The outer resin sheets 2 and 3 are formed of a biodegradable resin mainly composed of an aliphatic polyester and a natural resin. As the aliphatic polyester, polyhydroxyacetic acid, polylactide, polypropiolactone, poly (3-hydroxybutyrate-co-3hydroxyvalerate), polyethylene sebacate and the like can be used. Examples of natural fibers include cellulose derivatives such as shellac, dammar, chitansan gum, chitosan, collagen, and ethylcellulose. The thickness of the outer resin sheets 2 and 3 is preferably in the range of 0.3 mm to 1 mm in view of strength and decomposability.

The resin to be the outer layer resin sheets 2 and 3 is previously formed into a sheet by a casting method or the like, and the three sheets are laminated with an adhesive to form a three-layer structure. Alternatively, a three-layer structure may be formed by coating a solution of the resin to be the outer resin sheets 2 and 3 in an organic solvent on both surfaces of the inner resin sheet 1.

Further, on the outer surface of the outer resin sheet 2, a store name 42 and a store mark 43 expressed by characters and figures are printed in color.

The shopping bag A of this embodiment has the following advantages. [A] Shopping bag A is obtained by laminating a water-soluble inner resin sheet 1 mainly composed of partially saponified polyvinyl alcohol with outer resin sheets 2 and 3 mainly composed of aliphatic polyester and natural resin. . Therefore, even if water is attached to the goods or foods bought at the store or water leaks from the goods or foods, the shopping bag A is not broken, and the goods and foods do not fall from the shopping bag A. When the shopping bag A is taken out as garbage after use, the outer resin sheets 2 and 3 are decomposed by microorganisms and the inner resin sheet 1 is decomposed by water, so that the environment is not polluted.

[A] Since the outer resin sheet 2 is formed of a biodegradable resin containing aliphatic polyester and natural resin as main components, a shop name 42 and a shop mark 43 are printed on the outer resin sheet 2. can do. In the shopping bag A, the shop name 42 and the shop mark 43 expressed by characters and figures are printed in color on the outer surface of the outer resin sheet 2, so that the shop can be effectively advertised.

Next, a second embodiment (corresponding to claims 1, 2 and 3) of the present invention will be described with reference to FIGS. As shown in the figure, the shopping bag B is formed of a water-soluble resin sheet 5 containing polyvinyl alcohol as a main component and having a degree of polymerization of 500 to 3000 and a degree of saponification of 70 to 98 mol%. ing. As the polyvinyl alcohol, partially saponified polyvinyl acetate, polyvinyl alcohol modified with maleic acid, itaconic acid, or the like can be used.

When the degree of polymerization of polyvinyl alcohol is less than 500, the strength decreases, and when it exceeds 3000, it takes too much time for decomposition. On the other hand, if the saponification degree is less than 70 mol% or more than 98 mol%, the water solubility becomes poor. The thickness of the resin sheet 5 is preferably in the range of 0.5 mm to 2 mm in view of strength and decomposability.

A sheet 6 expressing the store name 61 in color characters is adhered to the surface of the resin sheet 5 using a water-soluble adhesive. The sheet 6 is a water-soluble resin sheet similar to the resin sheet 5. Reference numeral 51 denotes a handbag having a hole 511 for receiving a hand or an arm.

The shopping bag B of this embodiment has the following advantages. [C] The shopping bag B is formed of a water-soluble resin sheet 5 containing polyvinyl alcohol as a main component, and a water-soluble sheet 6 expressing a store name 61 is adhered to the surface of the resin sheet 5. For this reason, when the shopping bag B is taken out as garbage after use, the resin sheet 5 and the sheet 6 are decomposed by water, so that the environment is not polluted. In addition, the advertisement of the store can be effectively performed.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a shopping bag according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the shopping bag.

FIG. 3 is an explanatory view of a shopping bag according to a second embodiment of the present invention.

FIG. 4 is a sectional view of the shopping bag.

[Explanation of symbols]

 A, B Shopping bag 1 Inner layer resin sheet (resin sheet) 2, 3 Outer layer resin sheet (resin sheet) 5 Resin sheet 42 Store name 43 Mark (logo)

Claims (6)

[Utility model registration claims] 1. A shopping bag for putting goods and foods bought in a store and taking it home, wherein the shopping bag is formed of a biodegradable resin sheet. 2. A shopping bag for putting goods and foods bought in a store and taking it home, wherein the shopping bag is formed of a resin sheet containing partially saponified polyvinyl alcohol as a main component. 3. A sheet expressing a store name or a logo in characters or graphics is adhered to the surface of the resin sheet, and the sheet is mainly made of a biodegradable resin sheet or partially saponified polyvinyl alcohol. The shopping bag according to claim 1 or 2, wherein the shopping bag is a resin sheet as a component. 4. A shopping bag for putting goods and foods bought in a store and taking them home, comprising a three-layer structure in which a water-soluble or water-dispersible inner resin sheet is sandwiched between microbial degradable outer resin sheets. Shopping bag. 5. The shopping bag according to claim 4, wherein the inner resin sheet mainly comprises partially saponified polyvinyl alcohol, and the outer resin sheet mainly comprises aliphatic polyester and a natural resin. 6. The shopping bag according to claim 4, wherein a store name or a logo expressed by characters or graphics is printed on a surface of the outer layer resin sheet.