JP2017036087A - Packaging paper bag having excellent heat insulation/cold insulation ability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging paper bag which is excellent in heat insulation/cold insulation.SOLUTION: A packaging paper bag is composed of an original fabric sheet and a heat insulating sheet and includes: an internal space 41 surrounded by the heat insulating sheet; and an opening part 41 provided at a terminal on one side of the internal space. More specifically, the packaging paper bag is formed by integrating the original fabric sheet, in which a print layer is formed, with the heat insulating sheet. The heat insulating sheet includes an expanded foam layer, a metal layer, and a base material layer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat and cold packaging paper bag that is excellent not only in heat retention and cold performance but also in printability, is environmentally friendly, and can be reduced in cost, and a method for manufacturing the same.

  The packaging means used for storage and delivery for maintaining the freshness of the material or food uses wrapping paper having a heat insulating function. For example, in the case of foods such as ice confectionery, meat, fish, and cooked foods and drinks, it takes time to purchase or travel time after purchase, and there is a problem that the quality changes as the temperature of the contents changes. Therefore, the packaging means provided with another cold preservation or heat insulation function for storing the contents is required.

  Such a packaging means is provided for safely moving the contents, and is required to be easy to carry, particularly inexpensive and economical in addition to the heat retaining or cold retaining function.

  In general, as a commercially available packaging means having a heat insulation or cold insulation function, there are bag-like ones using a nonwoven fabric or a fabric, and these are inferior in portability because of their large volume and feeling of weight. Furthermore, because printing is required outside the container because it uses a nonwoven fabric or fabric, an adhesive is used to adhere to the printed matter, or a sticker-like printed matter is attached to the nonwoven fabric or fabric, and another process is required. Not only is the productivity significantly reduced, but there is a problem that the cost is significantly increased.

  Another form of wrapping paper with heat insulation or cold insulation function is to produce a heat insulating film by laminating foamed polyethylene or silver foil to a synthetic resin film that can be automatically produced, and then winding this up and using a roll Although produced, such wrapping paper simply performs the role of wrapping by simply laminating both sides, so the internal capacity is very small and handling is not easy. In addition, when applying a printing process to the wrapping paper, the process is complicated and costs are increased, and the foamed polyethylene or silver foil that adheres to the synthetic resin film is easily peeled off and the durability is significantly reduced. There is a point. Besides these problems, there is a drawback that recycling after use is not easy and is not environmentally friendly. Furthermore, in recent years, there is a demand for packaging bags such as shopping bags that simply exceed the level of wrapping paper according to the demands of shoppers.

Korean Open Patent 2011-0071262 (June 29, 2011)

  The present invention has been derived in order to solve the above-described problems, and is a packaging paper bag that is excellent in heat insulation and cold insulation performance, and in particular, can significantly improve handling properties, durability, and printability. The purpose is to provide.

  In addition, the present invention can remarkably improve the productivity of a packaging bag that is provided with a heat insulation and cooling function using raw fabric paper, and has excellent storability and heat insulation performance despite its thin thickness. The purpose is to provide packaging paper bags.

  Another object of the present invention is to provide an environmentally friendly packaging paper bag that can maximize the recyclability because the original paper can be easily separated.

  In order to achieve the above-described object, the present invention comprises a raw paper and a heat insulating sheet on which a printed layer is formed, and is provided at an inner space surrounded by the heat insulating sheet and at one end of the inner space. And a wrapping paper bag provided with the opening. In this case, the heat insulating sheet includes a foamed foam layer, a metal layer, and a base material layer, and provides a packaging paper bag excellent in heat insulation and cooling.

  Specifically, in the packaging paper bag according to the embodiment of the present invention, the heat insulating sheet may be one in which a foamed foam layer, a metal layer, and a base material layer are sequentially laminated on one surface of the raw fabric paper.

  Moreover, the packaging paper bag which concerns on this invention WHEREIN: In another one aspect | mode, the said heat insulation sheet can laminate | stack a base material layer, a metal layer, and a foamed foam layer in order on one surface of raw fabric paper.

  In the packaging paper bag according to the embodiment of the present invention, the base material layer may be made of any one or two or more selected from a polyester resin and a polypropylene resin.

  In the packaging paper bag according to the embodiment of the present invention, the heat insulating sheet may further include a protective layer provided on an outer layer of the foamed foam layer.

At this time, the protective layer may be made of any one or two or more selected from high density polyethylene and polyester resin having a density of 0.94 to 0.97 g / cm ³ .

  In the packaging paper bag according to an embodiment of the present invention, the metal layer may be selected from the group consisting of aluminum, stainless steel, gold, silver, copper, zinc, nickel, platinum, titanium, and mixtures thereof.

  In the packaging paper bag according to one embodiment of the present invention, the foamed foam layer is made of polyethylene, polypropylene, polystyrene, polyurethane, ethylene-propylene-diene terpolymer synthetic rubber, thermoplastic elastomer, ethylene vinyl acetate resin, neoprene rubber, styrene- It may be formed by foaming any one or more components selected from polyolefins consisting of butadiene rubber and nitrile-butadiene rubber.

In the packaging paper bag according to the embodiment of the present invention, the raw paper may have a basis weight of 50 to 200 g / m ² .

  The wrapping paper bag according to an embodiment of the present invention may be one in which a heat insulating sheet is integrated non-adheringly on one side of a raw paper.

  In the wrapping paper bag according to the embodiment of the present invention, the opening may be provided with a closing means that repeatedly opens and closes.

  Unlike conventional wrapping paper such as polyethylene foam film, the wrapping paper bag excellent in heat insulation and cold performance according to the present invention has excellent durability and improves handling by providing a form like a shopping bag. There is an advantage that printability and heat insulation / cooling performance can be remarkably improved.

  In addition, the packaging paper bag excellent in heat insulation and cold insulation performance according to the present invention can significantly reduce the thickness compared with the conventional packaging paper, and has excellent heat insulation and cold preservation despite having a thin thickness. There is an advantage that performance and durability can be realized.

  In particular, there is an advantage that the storage property with respect to the thickness and the heat insulating performance can be remarkably improved.

  In addition, the packaging paper bag having excellent heat insulation and cold performance according to the present invention has a simpler process than the conventional manufacturing process using polyethylene and can increase the production speed in the process, thereby reducing the cost. Yes, there are economic advantages.

  Furthermore, there is an advantage that recyclability can be maximized by using a raw paper that can be easily separated after use.

It is a figure which shows simply the packaging paper bag excellent in the heat insulation / cooling performance by one Example of this invention. It is a figure which shows the bag form of the packaging paper bag excellent in the thermal insulation heat retention performance by one Example of this invention. It is a figure which shows the lamination | stacking structure (AA ') of the sheet | seat of the packaging paper bag excellent in the thermal insulation cool performance by one Example of this invention. It is a figure which shows the lamination | stacking structure (AA ') of the sheet | seat of the packaging paper bag excellent in the thermal insulation cool performance by one Example of this invention. It is a figure which shows the lamination | stacking structure (AA ') of the sheet | seat of the packaging paper bag excellent in the thermal insulation cool performance by one Example of this invention.

  Hereinafter, with reference to the accompanying drawings, a packaging paper bag excellent in heat insulation and cold insulation performance of the present invention will be described in detail. The drawings introduced below are provided as examples to ensure that the spirit of the present invention is sufficiently transmitted to those skilled in the art. Further, unless otherwise defined in the technical and scientific terms used, it has the meaning normally understood by a person having ordinary knowledge in the technical field to which the present invention belongs.

  In the case of wrapping paper or a packaging container, which is a packaging means for storage, movement, and packaging of materials or foods that require heat insulation performance, the inventors of the present invention have a complicated manufacturing process and are inferior in productivity. Recognizing not only high cost and uneconomical but also problems of handling, storage and recyclability, especially extremely low printability, and as a result of intensive research to improve this, raw paper and As a packaging paper bag comprising an insulating sheet and having an inner space surrounded by the insulating sheet, the insulating sheet includes a foamed foam layer, a metal layer, and a base material layer, and the insulation and cooling packaging By providing a paper bag, it is possible to easily form a printing layer on the upper surface of the original fabric paper, which is excellent in printability, maximizes the synergy between productivity and cost reduction, and is easy to handle. so Enhance recyclability, found that implementing a and excellent thermal insulation cold performance and durability, and have completed the present invention.

  A packaging paper bag excellent in heat insulation and cold performance according to the present invention is composed of a raw paper sheet on which a printing layer is formed and a heat insulating sheet, forms an internal space surrounded by the heat insulating sheet, and has an appropriate one end at one end. The portion is provided with an opening to realize a form like a shopping bag. In this case, the original paper means a paper having a printed layer formed thereon, but not necessarily a printed layer, and includes a paper layer having no printed layer formed on the upper surface of the original paper. Any material can be used as long as the printed layer can be easily formed. That is, in the present invention, the printed layer includes notations for information disclosure, and may be based on the user's selection.

  In the wrapping paper bag according to the present invention, the inner space is surrounded by a heat insulating sheet, and it is possible to realize excellent heat insulation performance by minimizing the temperature change of the contents. The heat insulating sheet includes a foamed foam layer, a metal layer, and a base material layer, and the order in which these layers are laminated is important for the effect to be realized.

  One aspect of the wrapping paper bag according to the present invention is one in which an original sheet and a heat insulating sheet in which a foamed foam layer, a metal layer, and a base material layer are sequentially laminated on one surface thereof are integrated. In this way, the packaging paper bag integrated with the heat insulating sheet maximizes the effect of keeping the internal heat by shielding or reflecting the radiant heat transmitted from the surface of the contents stored in the internal space with the inner space surrounded by the heat insulating sheet. Can be In addition, the heat retaining and cooling performance can be significantly improved by the convection effect of the internal heat. In particular, the effect of allowing the heat present in the packaging paper bag to stay inside is superior to that the heat is taken away to the outside, and is more preferable when the contents stored in the internal space are in a high temperature condition. That is, in the heat insulating sheet integrated with the raw fabric paper, when the foamed foam layer, the metal layer, and the base material layer are sequentially laminated on one surface of the raw fabric paper, it goes without saying that the cold insulation performance is realized, and the thermal insulation performance effect is achieved. More preferable in implementation.

  As another aspect of the packaging paper bag according to the present invention, it is integrated with a heat insulating sheet in which a base fabric layer, a metal layer, and a foamed foam layer are sequentially laminated on one side of the original paper. This is laminated so that the temperature change of the contents stored in the internal space from the outside air can be minimized, and the metal layer at the lower end of the base material layer is externally facing the paper. At the same time, the internal space is surrounded by the foamed foam layer, and the temperature of the contents can be minimized. This can be realized by laminating a base material layer and a metal layer, a metal layer and a foamed foam layer, and metal particles are contained in the base material layer and the foamed foam layer, or the base material layer and the foamed layer. This is different from the case where a surface made of metal is included in a part of the foam layer.

  It goes without saying that heat insulation performance is realized by laminating a base material layer, a metal layer, and a foamed foam layer in order on one surface of the original fabric paper on the heat insulating sheet integrated with the original fabric paper. preferable.

  The packaging paper bag in which the base material layer, the metal layer, and the foamed foam layer are sequentially laminated on one surface of the raw fabric paper may further include a protective layer provided on the outer layer of the foamed foam layer. The protective layer can prevent the heat insulating sheet from being damaged by the contents stored in the internal space separately from the base material layer. That is, the internal foamed foam layer and the metal layer can be protected to improve the durability, and it is more preferable for maintaining the shape of the bag in combination with the adjacent raw paper.

The protective layer is not particularly limited, but preferably high density polyethylene (HDPE) can be used. Specifically, it is more preferable to use the high density polyethylene having a density of 0.94 to 0.97 g / cm ³ , preferably 0.95 to 0.96 g / cm ³ . When the said range is satisfy | filled, since durability and impact resistance of a packaging paper bag are excellent and formation of a product external shape is easy, it is more preferable.

  In the present invention, the substrate layer may be made of any one or two or more selected from polyester-based resins and polypropylene-based resins.

  The polyester-based resin may preferably be selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalic acid, polyethylene naphthalate, polyethylene terephthalate glycol, polycyclohexanedimethylene terephthalate, and mixtures thereof, This is not a limitation.

  Preferably, the base material layer of the present invention may be a polyethylene terephthalate (PET) film or a polypropylene (PP) film.

  In the present invention, the metal layer is for blocking or reflecting long wavelengths due to radiant heat and blocking outside air. The metal layer may include any one metal selected from the group consisting of aluminum, stainless steel, gold, silver, copper, zinc, nickel, platinum, titanium, and mixtures thereof, but is not necessarily limited thereto. It is not something.

  The metal layer may further include a blocking layer in order to further improve the heat insulation performance by radiant heat blocking and reflecting effects. In one embodiment, a heat insulating film including a metal layer and a barrier layer can be used. Specifically, the outermost layer is formed as a metal layer as a multilayer structure including at least one metal layer and a barrier layer. Can be used. The barrier layer is not particularly limited, but can be formed by applying a composition containing an epoxy resin. As a specific embodiment, the composition may be formed by coating a composition containing an epoxy resin, a curing agent and an organic solvent on the base material layer, and then curing. At this time, the epoxy resin is bisphenol A type epoxy resin, bisphenol F type epoxy resin, novolac type epoxy resin, cycloaliphatic epoxy resin, polyfunctional amine epoxy resin, glycidylamine type epoxy resin, dimer acid modified epoxy resin. , A rubber-modified epoxy resin, a urethane-modified epoxy resin, a brominated epoxy resin, a brominated phenoxy epoxy resin, a hydrogenated bisphenol A type epoxy resin, and a polyol-modified epoxy resin. It is not a thing.

The heat insulating film is not particularly limited, but has an oxygen permeability of 0.001 cc / m ² · day (25 ° C. condition) or less and a moisture permeability of 0.03 g / m ² · day (23 ° C. In order to realize the intended effect of the present invention, it is more preferable that the relative humidity is 85% or less.

  In the present invention, the metal layer may be formed by depositing a metal oxide on an upper part of the base material layer as a uniform state. This can not only block gases such as oxygen and water vapor, but can also realize a synergistic effect of durability and flexibility. Such a metal layer is not particularly limited, but preferably an aluminum foil can be used. More preferably, a metal oxide such as aluminum oxide or silica oxide formed by vapor deposition on the base material layer can be used. Moreover, the vapor deposition film by which the metal layer was vapor-deposited on the base material layer can be used.

  At this time, the thickness of the metal layer is not particularly limited, but may be 2,000 mm or less, preferably 200 to 1000 mm, and more preferably 400 to 800 mm in terms of effects.

  In the present invention, the foamed foam layer is made of polyethylene, polypropylene, polystyrene, polyurethane, ethylene-propylene-diene terpolymer synthetic rubber (EPDM), thermoplastic elastomer (TPE), ethylene vinyl acetate (EVA) resin, neoprene rubber, styrene- One or more polyolefin components selected from the group consisting of butadiene rubber (SBR) and nitrile-butadiene rubber (NBR) are foamed, and the foamed foam sheet is bonded and integrated on the metal layer. Can be formed into one. The foamed foam layer realizes heat insulation performance from the outside air, and of course enhances mechanical properties such as impact resistance and tensile strength to prevent damage to the contents and improve long-term durability. There is an advantage that can be. In particular, the foamed foam layer can realize a synergistic effect of durability and thermal insulation performance in combination with the raw paper. Furthermore, the volume feeling is more preferable because the form feeling can be maintained and the feeling of weight can be remarkably reduced due to the shape maintaining characteristics of the original fabric paper.

In the wrapping paper bag according to the present invention, the raw paper means a raw paper and is not particularly limited, but may be a paper sheet having a basis weight of 50 to 200 g / m ^2. . When satisfy | filling the said basic weight range, it is more preferable in terms of the efficiency with respect to performance. When deviating from the said range, a handleability, a softness | flexibility, and durability may fall.

  The raw paper may be kraft paper. The kraft paper can maximize the thermal insulation performance by combining the vapor deposition film and the foamed foam layer, and can improve the handling property, the storage property and the durability, is economical in terms of cost, and is in terms of recycling. Has the advantage of being environmentally friendly.

  Furthermore, the packaging paper bag according to the present invention can remarkably improve the printability by using raw paper, and can easily provide printing by forming a printing layer on one surface of the raw paper. preferable. In particular, it is not necessary to provide a separate adhesive or printing sheet or add a process, and it is easy to apply on an in-line process and productivity can be remarkably improved.

  Although the thickness range of the raw paper is not limited, the thickness can be adjusted in consideration of cost and economical aspects.

  In the present invention, the raw paper can ensure a synergistic effect and long-term reliability by combination with the heat insulating sheet. At this time, the raw paper and the heat insulating sheet may be integrated without being bonded. Specifically, the heat insulating sheet is not bonded using an adhesive for integration with the raw fabric paper, and a minimum bonding process for finishing can be performed. Thus, the wrapping paper bag in which the original fabric paper and the heat insulating sheet are integrated without bonding has an advantage that a space between the original fabric paper and the heat insulating sheet is provided and the heat insulating effect can be maximized.

  The packaging paper bag excellent in heat insulation and cold insulation performance according to the present invention may include an opening on one side surface, and the opening may include closing means that can be repeatedly opened and closed.

  The closing means is not particularly limited, and examples thereof include an adhesive tape, a synthetic resin fastener, and a Velcro fastener. Preferably, the thermal insulation performance can be improved by temporarily closing the opening by heat fusion using an adhesive tape or a hot melt ribbon.

  FIG. 1 is a diagram simply showing a packaging paper bag excellent in heat insulation and cold insulation performance according to an embodiment of the present invention, in which a paper bag made of a raw fabric paper and a heat insulating sheet is folded into a shape like a shopping bag, A packaging paper bag in which the internal space 41 is formed can be manufactured. At this time, the upper end of the shopping bag may be provided with means for facilitating carrying. As shown in FIG. 2, it can be manufactured in a handle type (handle type, (a)), a die-cut type (die) (b), a general type (c), or the like.

  The wrapping paper bag has a tube form in which the original fabric paper and the heat insulating sheet are integrated in a non-adhered state as a uniform state, and can be manufactured in a form that can stand up by forming a lower closing portion. At this time, regardless of the state of the bottom surface 42, the closing portion can be overlaid with paper bags to make the heat insulation, the heat insulation performance and the handling easier.

  Moreover, the closing means 31 which can be heat-seal-bonded using a hot-melt ribbon can be provided.

  FIG. 3 is a view showing a laminated structure of a wrapping paper bag according to an embodiment of the present invention. The raw paper 11 on which a printed layer 12 is formed, and a foamed foam layer 23 and a metal layer 22 on the raw paper 11. And the base material layer 21 is integrated with the heat insulation sheet laminated | stacked in order.

  As shown in FIG. 4, another aspect of the packaging paper bag according to the present invention is an original fabric paper 11 on which a printing layer 12 is formed and a base material layer 21, a metal layer 22 and an upper portion of the original fabric paper 11. The foamed foam layer 23 is integrated with a heat insulating sheet to be laminated.

  Further, as shown in FIG. 5, the other aspect of the wrapping paper bag according to the present invention is that the heat insulating sheet and the raw paper which are further laminated and further include a protective layer 24 on the outer layer of the foamed foam layer 23 of the paper bag shown in FIG. It may be converted into one.

  Hereinafter, the present invention will be described more specifically with reference to the following examples. However, these examples are for facilitating the understanding of the present invention, and the present invention is not limited thereby.

  The wrapping paper bag excellent in heat insulation and cold performance according to the present invention can be used as an application example in the field of maintaining the freshness of food that needs to be moved or reducing the temperature change of foods before delivery. Therefore, in the following examples, taking into consideration the movement or delivery of food, the contents were stored in the wrapping paper bag, the temperature change with time was observed, and the ambient temperature was set in consideration of summer and winter respectively.

Example 1
A paper bag was manufactured in which a foamed foam layer, a metal layer, and a base material layer were laminated in this order on one side of a raw paper (craft paper, basis weight 80 g / m ² ). Specifically, a 12 μm polyethylene terephthalate (PET) film in which aluminum is vapor-deposited to a thickness of 800 mm, and a polyethylene foam (0.9 mm) layer on one surface on which the aluminum is vapor-deposited using a hot press (120 ° C.). After affixing and manufacturing a heat insulation sheet, the paper bag (360 mm x 210 mm x 115 mm) which integrated this with original fabric paper according to the said lamination | stacking procedure was manufactured. At this time, the raw paper and the heat insulating sheet were integrated using a minimum of an adhesive so as not to be separated along the side surface of the opening. Next, it was bent into the form of a shopping bag (360 mm × 210 mm × 115 mm) as shown in FIG. 1 to produce a packaging paper bag.

(Example 2)
Unlike Example 1, a paper bag was manufactured in which a base material layer, a metal layer, and a foamed foam layer were laminated in this order on one side of an original fabric paper (craft paper, basis weight 80 g / m ² ). Specifically, a 12 μm polyethylene terephthalate (PET) film in which aluminum is vapor-deposited to a thickness of 800 mm, and a polyethylene foam (0.9 mm) layer on one surface on which the aluminum is vapor-deposited using a hot press (120 ° C.). After affixing and manufacturing a heat insulation sheet, the paper bag (360 mm x 210 mm x 115 mm) which integrated this with original fabric paper according to the said lamination | stacking procedure was manufactured. At this time, the raw paper and the heat insulating sheet were integrated using a minimum of an adhesive so as not to be separated along the side surface of the opening. Next, it was bent into the form of a shopping bag (360 mm × 210 mm × 115 mm) as shown in FIG. 1 to produce a packaging paper bag.

(Comparative Example 1)
Table 1 below shows the results after measuring the temperature change of the contents under the same conditions as in Example 1 except that raw paper without a heat insulating sheet (craft paper, basis weight 80 g / m ² ) was used. .

(Evaluation)
(1) Evaluation of heat retention performance After preparing the packaging paper bags manufactured in the examples and comparative examples, a container filled with 500 ml of warm water (80 ° C.) was put inside, and then the upper end of the opening was bent and a stapler was used. And finished. Next, the packaging paper bag was allowed to stand for 1 hour and 30 minutes in a refrigerator (3 ° C.) and the temperature change of the contents was measured. The results (unit: ° C.) are shown in Table 1 below.

(2) Evaluation of cold insulation performance After preparing the packaging paper bags manufactured in the examples and comparative examples, a container filled with 500 ml of cold water (4.2 ° C.) was put inside, and then the upper end of the opening was bent to staple the stapler. Was used for finishing. Next, the packaging paper bag is left in a room (30 ° C., humidity 64%) where there is almost no change in ambient temperature for 1 hour and 30 minutes, and the temperature change of the contents is measured. It is shown in Table 2.

  As described above, the present invention has been described with reference to a limited embodiment. However, this is provided to facilitate a more general understanding of the present invention. The present invention is not limited to the examples, and various modifications and variations can be made by those who have ordinary knowledge in the field to which the present invention belongs.

  Therefore, the idea of the present invention should not be defined by being limited to the above-described embodiments, and includes not only the scope of claims described later but also all modifications that are equivalent or equivalent to the scope of claims. Can be said to belong to the category of the inventive idea.

DESCRIPTION OF SYMBOLS 11 Raw paper 12 Print layer 21 Base material layer 22 Metal layer 23 Foam foam layer 24 Protective layer 31 Closing means 41 Internal space (opening)
42 Bottom

Claims (11)

It consists of raw paper and a heat insulating sheet on which a printed layer is formed,
A packaging paper bag comprising an internal space surrounded by the heat insulating sheet, and an opening provided at one end of the internal space,
The heat insulating sheet includes a foamed foam layer, a metal layer, and a base material layer, and is a packaging paper bag excellent in heat insulation and cooling.   The packaging paper bag excellent in heat insulation and cooling according to claim 1, wherein the heat insulating sheet is obtained by sequentially laminating a foamed foam layer, a metal layer, and a base material layer on one surface of the raw fabric paper.   The packaging paper bag excellent in heat insulation and cooling according to claim 1, wherein the heat insulating sheet is obtained by sequentially laminating a base material layer, a metal layer, and a foamed foam layer on one surface of the raw fabric paper.   The packaging paper bag excellent in heat insulation and cooling according to claim 1, wherein the base material layer is composed of any one or two or more selected from polyester resins and polypropylene resins.   The packaging paper bag excellent in heat insulation and cooling according to claim 3, wherein the heat insulating sheet further includes a protective layer provided on an outer layer of the foamed foam layer. The heat insulation and cooling according to claim 5, wherein the protective layer is made of any one or two or more selected from high-density polyethylene and polyester-based resin having a density of 0.94 to 0.97 g / cm ^3. Excellent packaging paper bag.   The package excellent in heat insulation and cooling according to claim 1, wherein the metal layer is a metal layer selected from the group consisting of aluminum, stainless steel, gold, silver, copper, zinc, nickel, platinum, titanium, and a mixture thereof. Paper bag.   The foamed foam layer is selected from polyolefins consisting of polyethylene, polypropylene, polystyrene, polyurethane, ethylene-propylene-diene terpolymer synthetic rubber, thermoplastic elastomer, ethylene vinyl acetate resin, neoprene rubber, styrene-butadiene rubber and nitrile-butadiene rubber. The packaging paper bag excellent in heat insulation and cooling according to claim 1, which is formed by foaming any one or more components. Raw paper, basis weight of 50 to 200 g / ^{m 2,} good packaging paper bag kept cold according to claim 1.   The packaging paper bag excellent in heat insulation and cooling according to claim 1, wherein the heat insulating sheet is integrated on one side of the raw fabric paper without adhesion. The packaging paper bag excellent in heat insulation and cooling according to claim 1, wherein the opening includes a closing unit that repeatedly opens and closes.