KR20170018655A - Paper Bag with thermally insulating properties to help maintain temperature of its content, keep cold items cold and hot items hot - Google Patents

Abstract

The present invention provides a packaging space comprising a fabric sheet and a heat insulating sheet, an inner space surrounded by the heat insulating sheet, and an opening at one end of the inner space. More particularly, the present invention relates to a packing space in which a fabric sheet having a print layer formed thereon and a heat insulating sheet are integrated, and the heat insulating sheet is provided with a packing area excellent in insulation and cooling including a foamed foam layer, a metal layer and a base layer.

Description

{Paper bag with thermally insulating properties to help maintain its temperature,

The present invention relates to a packaging zone for keeping warm and cold, which is excellent in printability as well as environmentally friendly and cost-saving, and a method for manufacturing the same.

The packaging means used for storage or delivery to maintain the freshness of the material or food is to use a wrapping paper having an insulating function. For example, in the case of foods such as ice-cream, meat, fish, and cooked foods, there is a problem that the time required for purchasing or the time required for moving after purchasing is required, which is deteriorated due to changes in the temperature of the contents. Therefore, a packaging means with a separate cooling or warming function for storing the contents is required.

Such a packaging means is provided so as to be able to move the contents safely, and is required to be easy to carry, particularly inexpensive and economical, in addition to the function of keeping warm or cold.

In general, packaging means having a function of maintaining a warming or cooling function in the market is a bag type using a nonwoven fabric or a cloth, and they are bulky and have a heavy weight, resulting in poor portability. In addition, since a nonwoven fabric or a cloth is used, when printing is required outside the container, a separate process of adhering the printed matter to the printed matter with an adhesive or attaching the sticky printed matter to the nonwoven fabric or cloth is required, There is a problem of rising.

In another form, a wrapping paper having a function of keeping or keeping a cold is manufactured by joining foamed polyethylene or silver foil to a synthetic resin film which can be automatically produced, and mass-producing the heat-insulating film by using a winding roll. The internal capacity is very narrow and is not easy to handle because it merely performs the role of packaging. Further, when the printing process is applied to the packaging paper, the process is complicated and costly compared to paper, and the foamed polyethylene or the silver foil adhered to the synthetic resin film is easily detached and the durability is remarkably deteriorated. In addition to these problems, recycling after use is not easy, which is not environment friendly. Moreover, according to the demand of the shopping buyer in recent years, there is a demand for a packaging bag such as a shopping bag which is simply out of the wrapping paper level.

Korean Patent Publication No. 10-2011-0071262 (June 29, 2011)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a packing zone which is excellent in warmth and cold performance and can drastically improve handling property, durability and printing suitability.

It is another object of the present invention to provide a packing space which can remarkably improve the productivity of a packing bag provided with a function of inserting and keeping a cold using a cloth paper and which is excellent in storage and heat insulation performance despite its thin thickness.

It is another object of the present invention to provide an eco-friendly packing area which can easily separate a fabric paper and maximize the degree of recycling.

In order to achieve the above object, the present invention provides a packing space comprising a raw paper sheet and a heat insulating sheet having a print layer formed thereon, an inner space surrounded by the heat insulating sheet and an opening at one end of the inner space. At this time, the heat insulating sheet includes a foamed foam layer, a metal layer, and a substrate layer.

Specifically, in the packaging area according to an embodiment of the present invention, the heat insulating sheet may be formed by sequentially laminating a foamed foam layer, a metal layer, and a substrate layer on one surface of a raw paper sheet.

According to another aspect of the packaging area according to the present invention, the heat insulating sheet may be a laminate of a substrate layer, a metal layer, and a foamed foam layer sequentially formed on one side of the paper sheet.

In the packaging area according to one embodiment of the present invention, the base layer may be made of one or more selected from a polyester-based resin and a polypropylene-based resin.

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

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

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.

The foamed foam layer may be made of polyethylene, polypropylene, polystyrene, polyurethane, ethylene-propylene-diene terpolymer synthetic rubber, thermoplastic elastomer, ethylene vinyl acetate resin, neoprene rubber, styrene -Butadiene rubber, and a polyolefin composed of a nitrile-butadiene rubber.

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

The packaging area according to an embodiment of the present invention may be one in which the heat insulating sheet is integrally bonded to one surface of the raw paper.

In the packaging zone according to an embodiment of the present invention, the opening may be provided with a closing means that is repeatedly opened and closed.

Unlike the packaging paper such as the conventional polyethylene foam film, the packing area having excellent insulating and inserting performance according to the present invention is excellent in durability and provides a form such as a shopping bag, thereby enhancing the handling property and greatly improving the printability and the heat- There are advantages to be able to.

In addition, the packaging area having excellent insulating and cooling performance according to the present invention can remarkably reduce the thickness as compared with the conventional wrapping paper, and has an advantage that it can realize excellent insulation performance and durability in spite of having a thin thickness.

In particular, there is an advantage that the storage and thermal insulation performance compared with the thickness can be remarkably improved.

In addition, the packing area having excellent insulating and inserting performance according to the present invention has a simpler process than the conventional process using polyethylene, and can increase the production speed in the process, thereby reducing the cost and economical advantage.

Moreover, there is an advantage that the recyclability can be maximized by using a fabric paper which can be easily separated after use.

FIG. 1 is a schematic view of a packaging area having excellent insulation and cooling performance according to an embodiment of the present invention.
FIG. 2 shows a bag form of a packing area having excellent insulating and cooling performance according to an embodiment of the present invention.
Figs. 3 to 5 show a laminated structure (A-A ') of a sheet for a packing area having excellent insulating and cooling performance according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, with reference to the accompanying drawings, a description will be made in detail of a packaging area having excellent heat-insulating and cooling performance of the present invention. The following drawings are provided as examples for allowing a person skilled in the art to sufficiently convey the idea of the present invention. In addition, unless otherwise defined in the technical terms and scientific terms used, those having ordinary skill in the art to which the present invention belongs have the same meaning as commonly understood.

The inventors of the present invention have found that, in the case of a packaging paper or a packaging container for packaging, storing, transporting, and packing materials or foods requiring insulation and cooling performance, the manufacturing process is complicated and the productivity is low, The present invention has been made to solve the above problems and it is an object of the present invention to provide a packaging sheet comprising a sheet of paper and a heat insulating sheet and having an inner space surrounded by the heat insulating sheet, And the heat insulating sheet comprises a foamed foam layer, a metal layer, and a base layer. By providing the packing space for keeping warm and cold, a printing layer can be easily formed on the upper surface of the fabric paper, It is possible to maximize the effect, to be easy to handle, to increase the recyclability, The cooling performance and the durability can be realized, and the present invention has been completed.

The packing area having excellent insulating and inserting performance according to the present invention is formed of a raw paper and a heat insulating sheet on which a printing layer is formed and forms an internal space surrounded by the heat insulating sheet and has an opening in a suitable part of one end thereof, Shape. In this case, the raw paper means that a print layer is formed, but it is not necessarily a print layer, but may be one that can easily form a print layer on the upper surface of a raw paper including a print layer. That is, in the present invention, the print layer includes what is displayed for information disclosure and can be selected by the user.

The packaging space according to the present invention can achieve excellent insulation and cooling performance by minimizing the temperature change of the contents because the inner space is surrounded by the heat insulating sheet. At this time, the heat insulating sheet is characterized by including a foamed foam layer, a metal layer and a base layer.

The packing area according to the present invention may be one in which a foamed foam layer, a metal layer, and a base layer are sequentially laminated on one side of the fabric paper and integrated with a heat insulating sheet. The packing space integrated with the heat insulating sheet can maximize the effect of keeping the internal heat by blocking or reflecting radiant heat transmitted from the surface of the contents contained in the internal space by the inner space surrounded by the heat insulating sheet, Thereby ultimately improving the heat retention and cooling performance. In particular, the effect of staying inside heat is better than taking heat away from the outside, which is better when the contents of the inside space are in a high temperature condition. That is, when a foamed foam layer, a metal layer and a substrate layer are sequentially laminated on one surface of a fabric paper in a heat insulating sheet integrated with the fabric paper, it is more preferable to implement a cooling performance and to realize a heat insulation performance effect.

In another aspect, the packaging area according to the present invention may be one integrated with a heat insulating sheet in which a base layer, a metal layer, and a foamed foam layer are sequentially laminated on one side of the fabric paper. This is a laminate in which the temperature change of the contents contained in the inner space from the outside air can be minimized, The metal layer at the lower end faces the paper while blocking heat from the outside, and at the same time, the internal space is surrounded by the foamed foam layer so that the temperature of the contents can be minimized. That is, the substrate layer, the metal layer, and the foamed foam layer are sequentially laminated on one side of the fabric sheet on the heat insulating sheet integrated with the fabric paper, thereby realizing the heat insulating performance and, more preferably, the cooling performance effect.

At this time, the packing area, in which the substrate layer, the metal layer, and the foamed foam layer are sequentially stacked on one side of the fabric paper, the packaging area may further include a protective layer 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 inner space separately from the substrate layer. That is, it can improve the durability by protecting the foamed foam layer and the metal layer inside, and is better for keeping the shape of the bag in combination with the adjacent fabric paper.

The protective layer is not particularly limited, but high density polyethylene (HDPE) can be preferably used. Specifically, it is more preferable that the high-density polyethylene has a density of 0.94 to 0.97 g / cm 3, preferably 0.95 to 0.96 g / cm 3. When the above-mentioned range is satisfied, it is more preferable that the packaging area is excellent in durability and impact resistance, and the outer shape of the product is easily formed.

In the present invention, the substrate layer may be made of one or more selected from a polyester resin and a polypropylene resin.

The polyester resin is preferably selected from the group consisting of polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalic acid, polyethylene naphthalate, polyethylene terephthalate glycol, polycyclohexanedimethylene terephthalate, and mixtures thereof And is not necessarily limited thereto.

Preferably, the substrate 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 used for blocking or reflecting long wavelengths due to radiant heat and shielding the outside air. The metal layer may be formed from a group consisting of aluminum, stainless steel, gold, silver, copper, zinc, nickel, platinum, titanium, And may include any metal selected, but is not necessarily limited thereto.

The metal layer may further include a barrier layer to further improve the heat insulation performance by blocking the radiation heat and reflecting the metal. In one embodiment, a heat insulating film including a metal layer and a barrier layer may be used. Specifically, a heat insulating film including a metal layer and a barrier layer may be used. The barrier layer is not particularly limited, but may be formed by applying a composition containing an epoxy resin. In a specific embodiment, the composition may be formed by coating a composition comprising an epoxy resin, a curing agent, and an organic solvent on a substrate layer, followed by curing. The epoxy resin may be at least one selected from the group consisting of a bisphenol A epoxy resin, a bisphenol F epoxy resin, a novolac epoxy resin, a cycloaliphatic epoxy resin, a multifunctional amine epoxy resin, a glycidylamine type epoxy resin, A rubber-modified epoxy resin, a urethane-modified epoxy resin, a brominated epoxy resin, a brominated phenoxy epoxy resin, a hydridesided bisphenol A type epoxy resin, and a polyol modified epoxy resin.

The heat insulating film is not particularly limited, but it is preferable that the insulating film has an oxygen permeability of 0.001 cc / m 2 · day (25 ° C) or less and a water permeability of 0.03 g / m 2 · day (23 ° C and a relative humidity of 85% It is better to implement the desired effect of the invention.

In an embodiment of the present invention, the metal layer may be formed by depositing a metal oxide on the substrate layer. This not only can block gases such as oxygen and water vapor, but also can achieve synergy of durability and flexibility. Such a metal layer is not particularly limited, but aluminum foil can be preferably used. More preferably, a metal oxide such as aluminum oxide or silica oxide may be used to deposit on the substrate layer. Further, an evaporated film in which a metal layer is deposited on a base layer can be used.

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

In the present invention, the foamed foam layer may be formed of at least one selected from the group consisting of polyethylene, polypropylene, polystyrene, polyurethane, ethylene-propylene-diene terpolymer synthetic rubber (EPDM), thermoplastic elastomer (TPE), ethylene vinyl acetate (EVA) Rubber (SBR), and nitrile-butadiene rubber (NBR). The foamed foam sheet may be integrally formed by bonding a foamed foam sheet to a metal layer. The foamed foam layer has the advantage of improving the durability as well as preventing damage to the contents by reinforcing mechanical properties such as impact resistance and tensile strength, while maintaining the heat retaining performance from the outside air. In particular, the foamed foam layer can realize a synergistic effect of durability and insulated and refrigerated performance in combination with fabric paper. Moreover, due to the voluminousness, the form can be maintained according to the shape retention characteristics of the fabric paper, and the weight can be significantly reduced.

In the packaging area according to the present invention, the fabric paper is not particularly limited, but may have a basis weight of 50 to 200 g / m ² . In the case where the above-mentioned basis weight range is satisfied, it is better in view of performance. If it is out of the above range, handleability, flexibility and durability may be deteriorated.

Kraft paper may be used as the fabric paper in the present invention. The above kraft paper can be combined with the evaporated film and the foamed foam layer to maximize the performance of insulated and refrigerated but can improve handling, storage and durability, and is economical in terms of cost and environmentally friendly in terms of recycling.

In addition, the packing area according to the present invention can dramatically improve the printability by using a fabric paper, and the printing layer can be formed on one side of the fabric paper to easily provide printing. In particular, it is not necessary to provide a separate adhesive or a printing sheet or to add a process, and it is easy to apply in an in-line process, so that the productivity can be remarkably improved.

The thickness of the fabric paper is not limited, but the thickness can be adjusted in consideration of several economical aspects.

In the present invention, the fabric paper can be combined with the heat insulating sheet to ensure a synergistic effect and long-term reliability. At this time, the fabric paper and the heat insulating sheet are unbonded and integrated. Specifically, the heat insulating sheet is not bonded by using an adhesive to integrate with the fabric paper, and a minimum bonding process for finishing can be performed. As described above, the unpacking-unifying wrapping area between the fabric paper and the heat insulating sheet has an advantage that a space between the fabric paper and the heat insulating sheet is maximized.

The packing area having excellent insulating and inserting performance according to the present invention may have an opening portion on one side and the opening portion may include a closing means which can be repeatedly opened and closed.

The closing means is not particularly limited, but examples thereof include an adhesive tape, a synthetic resin zipper, and a velcro fastener. Preferably, the opening is temporarily closed through thermal fusion using an adhesive tape or a hot-melt ribbon to improve the performance of the heat insulation and cooling.

FIG. 1 is a view schematically showing a packing area having excellent insulation and cooling performance according to an embodiment of the present invention. The area of the packaging sheet is formed by folding a fabric sheet and a sheet made of a heat insulating sheet into the shape of a shopping bag, Can be produced. At this time, the upper end of the shopping bag may have a means for facilitating the carrying. (A), a die-cut type (b), and a general type (C), as shown in FIG.

The packing area may be formed in a tube shape by integrating the fabric paper and the heat insulating sheet in a non-adhered state, and then forming a lower closing part to form a standing part. At this time, the closure part can be attached to the bed to make it easier to adhere to the floor surface 42, to insulate it, to insulate it, and to make it easier to handle.

In addition, a closure means 31 that can be bonded by heat fusion using a hot-melt ribbon may be provided.

FIG. 3 shows a laminated structure of a packaging area according to an embodiment of the present invention. The laminated structure comprises a raw paper 11 on which a printing layer 12 is formed, and a foamed foam layer 23, (22) and the substrate layer (21) are laminated.

Another aspect of the packing area according to the present invention is that the packaging paper 11 having the printing layer 12 formed thereon as shown in Fig. 4 and the base paper layer 11, the metal layer 22, And the foamed foam layer 23 are laminated.

Another aspect of the packing area according to the present invention is that the packaging sheet further includes a protective layer 24 on the outer layer of the foamed foam layer 23 of the zone according to FIG. 4 as shown in FIG. .

Hereinafter, the present invention will be described more specifically with reference to the following examples. However, these embodiments are provided for the purpose of helping understanding of the present invention, but the present invention is not limited thereto.

The packaging zone having excellent insulating and inserting performance according to the present invention is one application example and can be used in the field of maintaining the freshness of the food requiring movement or reducing the temperature change of the food to be delivered. Accordingly, in the following examples, the contents were stored in the packaging zone considering the movement or delivery of food, and then the temperature changes with time were examined, and the ambient temperature was set in consideration of summer and winter, respectively.

(Example 1)

A foamed layer, a metal layer, and a substrate layer were sequentially laminated on one side of the fabric paper (kraft paper, basis weight: 80 g / m 2). Specifically, a polyethylene terephthalate (PET) film with a thickness of 800 Å and a polyethylene terephthalate (PET) film with a thickness of 800 Å were laminated to each other using a hot press (120 ° C.) (360 mm x 210 mm x 115 mm) in which the paper was integrated with the fabric paper in accordance with the lamination sequence. At this time, the fabric paper and the heat insulating sheet were integrated using a minimum amount of adhesive so as not to spread along the side surface of the opening. Thereafter, the bag was folded in the form of a shopping bag (360 mm x 210 mm x 115 mm) as shown in Fig.

(Example 2)

Unlike Example 1, a zone in which a substrate layer, a metal layer and a foamed foam layer were sequentially laminated on one side of a fabric paper (kraft paper, basis weight: 80 g / m 2) was prepared. Specifically, a polyethylene terephthalate (PET) film with a thickness of 800 Å and a polyethylene terephthalate (PET) film with a thickness of 800 Å were laminated to each other using a hot press (120 ° C.) (360 mm x 210 mm x 115 mm) in which the paper was integrated with the fabric paper in accordance with the lamination sequence. At this time, the fabric paper and the heat insulating sheet were integrated using a minimum amount of adhesive so as not to spread along the side surface of the opening. Thereafter, the bag was folded in the form of a shopping bag (360 mm x 210 mm x 115 mm) as shown in Fig.

(Comparative Example 1)

The temperature change of the contents was measured under the same conditions as in Example 1, except that a fabric paper without a heat-insulating sheet (kraft paper, basis weight 80 g / m 2) was used, and the results are shown in Table 1 below.

(evaluation)

(1) Thermal insulation performance evaluation

After preparing the packing zones prepared in Examples and Comparative Examples, a container containing 500 ml of hot water (80 ° C) was placed inside, and then the top of the opening was folded and finished with a stapler. Next, the above-mentioned packing area was left for 1 hour and 30 minutes in a refrigerated room (3 ° C), and the temperature change of the contents was measured. The result (unit: ° C) is shown in Table 1 below.

(2) Cooling performance evaluation

After preparing the packing zones prepared in Examples and Comparative Examples, a container containing 500 ml of cold water (4.2 ° C) was placed inside, and then the top of the opening was folded and finished with a stapler. Next, the packaging area was left for 1 hour and 30 minutes at room temperature (30 ° C., humidity 64%) with little change in ambient temperature, and the temperature change of the contents was measured. The result (unit: ° C.) Respectively.

division 5 minutes 10 minutes 20 minutes 30 minutes 40 minutes 50 minutes 60 minutes 70 minutes 80 minutes 90 minutes Example 1 84.1 79 71.1 66.8 61.5 57.1 53 49.4 46.4 43.6 Comparative Example 1 80.8 73.6 63.6 58.4 52.2 47.3 42.9 39.1 36 33.3

division 5 minutes 10 minutes 20 minutes 30 minutes 40 minutes 50 minutes 60 minutes 70 minutes 80 minutes 90 minutes Example 1 4.5 5.5 6.8 8.0 9.2 10.1 11.1 12.1 12.9 13.7 Example 2 4.9 5.8 7.2 8.4 9.7 10.6 11.6 12.6 13.5 14.3 Comparative Example 1 5.6 7.2 9.3 11.3 13.1 14.4 15.7 17.0 18.0 18.8

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Various modifications and variations are possible in light of the above teachings.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

11: Fabric paper
12: Printed layer
21: substrate layer
22: metal layer
23: foamed foam layer
24: Protective layer
31: Closing means
41: inner space (opening)
42: bottom surface

Claims (11)

A fabric sheet having a print layer formed thereon, and a heat insulating sheet,
A packing space having an inner space surrounded by the heat insulating sheet and an opening at one end of the inner space,
Wherein the heat insulating sheet comprises a foamed foam layer, a metal layer, and a substrate layer. The method according to claim 1,
Wherein the heat insulating sheet is formed by sequentially laminating a foamed foam layer, a metal layer, and a substrate layer on one side of a fabric paper, wherein the packaging sheet has excellent insulating and cooling performance. The method according to claim 1,
Wherein the heat insulating sheet is formed by sequentially laminating a base layer, a metal layer and a foamed foam layer on one surface of a raw paper sheet, wherein the insulating sheet is excellent in insulated cooling. The method according to claim 1,
Wherein the substrate layer is made of one or more selected from a polyester-based resin and a polypropylene-based resin. The method of claim 3,
Wherein the heat insulating sheet further comprises a protective layer on the foamed foam layer outer layer, and is excellent in insulated cooling. 6. The method of claim 5,
Wherein the protective layer is made of one or more selected from a high density polyethylene and a polyester resin having a density of 0.94 to 0.97 g / cm < 3 >. The method 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 mixtures thereof. The method according to claim 1,
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 Which is formed by foaming any one or more of the above components. The method according to claim 1,
Wherein said fabric paper has a basis weight of 50 to 200 g / m < 2 > The method according to claim 1,
Wherein the packaging sheet is one in which the heat insulating sheet is unbonded to one surface of the fabric paper and is integrated. The method according to claim 1,
Wherein the opening portion includes a closing means that is repeatedly opened and closed.

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