JP2010173684A - Device for keeping food product fresh - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably keep a food product, etc. fresh for a long time by preventing a freshness-keeping-liquid enclosed in a packaging cover from oozing out. <P>SOLUTION: A packaging cover 3 covering an absorbent 2 outwardly is formed by sealing the four sides of the peripheral edge 4A of two top and bottom laminated films 4 in a mutually superimposed condition. The film 4 comprises a transparent or translucent film 5 formed using a hydrophilic film made of a resin material for allowing the permeation of a freshness-keeping-liquid in the form of gas and preventing the permeation of the same in the form of a liquid, a print layer 6 formed by printing on the inside face of the film 5, and a sealant layer 7 forming a sealing part 9 on the film 5 around the periphery of the absorbent 2 in manufacturing the film 5 as a packaging cover provided on the inside face of the film 5 with the layer 6 in between. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a food freshness holding tool that is suitably used for storing foods such as foods and confectionery for a long period of time and maintaining the freshness thereof.

  In general, it is known to use a food freshness holder in order to maintain the freshness of food or other preserved items. Such food freshness holders are used by inserting one or a plurality of such food freshness holders into food packaging bodies such as foods and confectionery (for example, see Patent Document 1).

  This type of conventional food freshness holder is constituted by impregnating an adsorbent with a volatile freshness-maintaining liquid mainly composed of, for example, ethyl alcohol, and the adsorbent is made of, for example, natural pulp material. It is formed as a small flat plate having a rectangular shape.

  In addition, a film-like cover that covers such an adsorbent from the outside has a skirt portion that projects to the side of the adsorbent, and the freshness-retaining liquid gradually evaporates from the adsorbent to the outside. Thus, the volatilization opening is provided. And the freshness retention liquid in the said adsorption body gradually volatilizes in the food packaging body through the said volatilization opening from the skirt part of a cover.

  As a result, the freshness-retaining liquid fills the space (head space) in the food packaging body with a volatile gas (gasification atmosphere) and is adsorbed to the surface layer side for hydrophilic foods, for example, microorganisms such as mold Suppresses the growth of

Japanese Patent No. 3159661

  By the way, in the food freshness holder of the prior art described above, an opening for volatilization is provided in a film-like cover that covers the adsorbent from the outside, and the freshness-retaining liquid in the adsorbent gradually evaporates into the food packaging through the volatilization opening. To do. However, for users such as consumers, such a volatilization opening may be misunderstood as a defective cover (opening due to a seal failure or damage), and further improvement is desired.

  In addition, when a food freshness holder is inserted into a food package such as confectionery and used, if a plurality of food packages are transported and transported in a stacked state, a large external force is applied to the food freshness holder in the middle. May act. Then, when the freshness-retaining liquid impregnated in the adsorbent body is subjected to the action of an external force, there is a possibility that the freshness-retaining liquid may ooze out from the volatilization opening in a liquid state. In addition, if the freshness-holding liquid oozes out into the food packaging while in a liquid state, the freshness-holding liquid in the adsorbent may be locally sucked toward the confectionery (food), thereby causing the food freshness. There is a problem that not only the effect as a holder is lowered, but also the taste of food may be affected.

  In addition, paper dust generated in, for example, a cutting process during manufacturing may remain on the adsorbent that adsorbs the freshness-retaining liquid. And if such paper dust comes out from the volatilization opening of the film-like cover, users such as consumers may misunderstand it as a foreign object. There is a problem of causing a decrease in value.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to prevent the freshness-retaining liquid from exuding to the outside of the cover due to the action of an external force, etc. An object of the present invention is to provide a food freshness holder that can be stably held over a long period of time and can increase the commercial value.

  In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that a volatile freshness-keeping liquid containing alcohol for adsorbing freshness-keeping liquid in an impregnated state in order to preserve the freshness of food or other stored objects. The present invention is applied to a food freshness holder composed of an adsorbent made and a packaging cover that covers the adsorbent from the outside.

  The feature of the configuration adopted by the invention of claim 1 is that the packaging cover is formed using a hydrophilic film made of a resin material and allows the freshness-retaining liquid to permeate in a vaporized state. A transparent or translucent film body that prevents transmission, a printing layer formed by printing on the inner surface of the film body, and the film body provided on the inner surface of the film body with the printing layer interposed therebetween When manufacturing as the packaging cover, there is a sealant layer that forms a sealing portion on the film body around the adsorbent.

  On the other hand, the invention of claim 2 is directed to a volatile freshness-keeping liquid containing alcohol to maintain the freshness of foods or other stored objects, and a packaging cover in which the freshness-keeping liquid is sealed in a liquid state. And the packaging cover is formed using a hydrophilic film made of a resin material, and the transparent or translucent film body that allows the freshness-retaining liquid to permeate in a vaporized state and prevents permeation in the liquid state; A printing layer formed by printing on the inner surface of the film body; and the freshness retention when the film body is provided as the packaging cover provided on the inner surface of the film body across the printing layer. The sealing part in which the liquid is sealed is configured to include a sealant layer that forms the film body.

  Moreover, according to invention of Claim 3, it is set as the structure which provides the translucent nonwoven fabric layer which formed the contact bonding layer in the outer surface of the said film body, and was laminated | stacked on the said packaging cover.

  According to a fourth aspect of the present invention, the sealant layer is composed of a number of strip-like adhesive layers formed at intervals so as to intersect with each other on the inner surface of the film body.

  As described above, according to the invention of claim 1, the packaging cover that covers the adsorbent from the outside is formed using the hydrophilic film that allows the freshness-retaining liquid to permeate in a vaporized state and prevents permeation in the liquid state. Since the film body and the sealant layer formed by sandwiching the printing layer on the inner surface of the film body, the gas volatilized and gasified from the freshness-retaining liquid impregnated in the adsorbent is used for the packaging cover. The film body (hydrophilic film) can be transmitted and volatilized to the outside. Thereby, like the prior art, a freshness-keeping liquid can be volatilized outside without specially providing a volatilization opening or the like, and a freshness-keeping effect on foods and the like can be exhibited.

  Even if a forced external force is applied to the adsorbent from the outside of the packaging cover, the freshness retaining liquid impregnated in the adsorbent does not permeate the film body in the liquid state. The freshness-keeping liquid can be stored and stored in an encapsulated state, and the freshness-keeping liquid can be prevented from exuding outside in the liquid state by a packaging cover made of a film body. Therefore, the freshness-retaining liquid impregnated in the adsorbent can be prevented from exuding to the outside due to the action of external force, etc., and the freshness of foods and the like can be stably maintained for a long period of time, and the food freshness-holding tool As a product value can be increased.

  Moreover, since the invention of claim 2 is configured to enclose a volatile freshness-retaining liquid in a liquid state in a packaging cover composed of a film body, a printing layer, and a sealant layer, for example, it is used in the invention of claim 1. The adsorbent can be eliminated, and the number of parts can be reduced to simplify the manufacturing process. In addition, the packaging cover made of a film body can prevent the freshness-retaining liquid inside from exuding to the outside in a liquid state, can keep the freshness of food, etc. stably over a long period of time, and the food freshness The product value as a holder can be increased.

  Moreover, in invention of Claim 3, since the translucent nonwoven fabric layer is laminated | stacked and provided in the outer surface of the film body which comprises a packaging cover, while a film body can be reinforced with a nonwoven fabric layer, The glossiness on the outer surface can be suppressed from the outside with a translucent nonwoven fabric layer, and the appearance as a packaging cover can be improved. In addition, if the user misunderstands that the surface is wet due to the glossiness, this gives the impression that the internal freshness-holding liquid has oozed out of the packaging cover. However, by covering the outer surface of the film body with a translucent nonwoven fabric layer, the glossiness can be eliminated by the nonwoven fabric layer, and problems such as misunderstanding by the user can be eliminated.

  Furthermore, according to the invention of claim 4, since the sealant layer is constituted by a number of strip-like adhesive layers formed at intervals in a state of intersecting with each other on the inner surface of the film body, the gas of the gasified freshness retaining liquid Even when the sealant layer cannot pass through, the gas of the freshness-retaining liquid can be transmitted to the outside of the film body from between these belt-like adhesive layers, and the material selection range as the sealant layer can be expanded. In addition, since the sealing part can be formed on the outer edge side of the film body by any of a large number of strip-like adhesive layers, it is possible to contain a freshness-retaining liquid (adsorbent) in the film body using the sealing part. it can.

It is the perspective view which looked at the food freshness holder by the 1st Embodiment of this invention from diagonally upward. It is the top view which looked at the food freshness holder of FIG. 1 from the upper side. It is sectional drawing which expanded the food freshness holder from arrow III-III direction in FIG. It is a disassembled perspective view which shows the state before enveloping an adsorbent using two upper and lower laminated films. It is an expanded view which expands and shows the sealant layer which consists of many strip | belt-shaped adhesive bond layers formed in the inner surface of a film body. It is principal part sectional drawing which expanded the food freshness holder from the arrow VI-VI direction in FIG. It is a characteristic diagram which shows the relationship between the alcohol density | concentration of freshness retention liquid, and the permeability | transmittance of gas. It is an expanded view which expands and shows the sealant layer which consists of many strip | belt-shaped adhesive bond layers by a modification. It is an expanded sectional view which expands and shows the principal part of the food freshness holder by 2nd Embodiment. FIG. 10 is an expanded view showing an enlarged sealant layer in FIG. 9. It is sectional drawing which expands and shows the food freshness holder by 3rd Embodiment. It is a disassembled perspective view which shows the state before wrapping an adsorption body from the upper direction using the laminated film by 3rd Embodiment. It is an expanded view which expands and shows the sealant layer which consists of many strip | belt-shaped adhesive bond layers formed in the inner surface of a film body. It is an expanded view which expands and shows the adhesive layer which consists of many strip | belt-shaped adhesive bond layers formed in the outer surface of a film body. It is the expanded sectional view which looked at the principal part of the food freshness holder from the arrow XV-XV direction in FIG. It is an expanded sectional view in the position similar to FIG. 15 which shows the principal part of the food freshness holder by 4th Embodiment. It is sectional drawing which expands and shows the food freshness holder by 5th Embodiment. It is sectional drawing which expands and shows the food freshness holder by 6th Embodiment.

  Hereinafter, a food freshness holder according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings, taking as an example a case where the food freshness holder is used for food preservation.

  Here, FIG. 1 to FIG. 7 show a first embodiment of the present invention. In the figure, reference numeral 1 denotes a food freshness holder used in the present embodiment. The food freshness holder 1 includes an adsorbent 2 described later and a packaging cover described later that covers the adsorbent 2 so as to be sealed from the outside. 3 is roughly constituted.

  2 is an adsorbent that is adsorbed with a freshness-retaining liquid in an impregnated state, and the adsorbent 2 is formed into a rectangular flat plate shape as shown in FIGS. The length is about 20 to 60 mm, the width is about 15 to 40 mm, and the thickness is about 1 to 3 mm.

  The adsorbent 2 is impregnated with a volatile freshness-maintaining liquid mainly composed of, for example, ethyl alcohol. In this case, as the freshness-retaining liquid, for example, an alcohol aqueous solution in which ethyl alcohol is 30 to 99 vol%, preferably 55 to 95 vol% is used. Such a freshness-retaining liquid volatilizes gradually from the outer surface of the adsorbent 2 and is volatilized to the outside through the film body 5 described later. Thereby, for example, the inside of a food package (not shown) such as confectionery is filled with the vapor (gas) of the gasified freshness-keeping liquid, and a freshness-keeping effect is obtained.

  Reference numeral 3 denotes a packaging cover that covers the adsorbent body 2 from the outside. The packaging cover 3 is configured such that, for example, a laminated film 4 (described later) is arranged so as to be stacked two on the top and bottom, and the peripheral edge 4A is sealed over four sides. It is formed by stopping. That is, as shown in FIG. 4, these laminated films 4 are continuously sealed on the four sides by a sealing portion 9 described later with the adsorbent 2 sandwiched from both the upper and lower sides.

  Here, the laminated film 4 is formed by laminating a printing layer 6 and a sealant layer 7 on a film body 5 described later. The laminated film 4 is prepared, for example, as a pair of upper and lower sheets as shown in FIG. 4, and sandwiches the adsorbent body 2 from both the upper and lower sides, and seals the four sides with a seal described later. By forming the portion 9, the adsorbent 2 is wrapped as a packaging cover 3 in a state of being completely sealed from the outside.

  Further, the laminated film 4 in this case is formed as a thin sheet (see FIG. 4) having a rectangular shape with a size larger than that of the adsorbing body 2, and laterally from the adsorbing body 2 (for example, front, rear and left, The peripheral edge 4A side projecting in the right direction) is sealed (heat-sealed) upward and downward by a sealing portion 9 described later. And the upper and lower laminated films 4 cover the adsorbent body 2 from the outside at the portion located inside the portion corresponding to each sealing portion 9, thereby constituting the packaging cover 3 of the adsorbent body 2. is there.

  Reference numeral 5 denotes a transparent or translucent film body constituting the main part of the laminated film 4, and the film body 5 is formed using a hydrophilic film made of a resin material, and the film body is in a state where the freshness-retaining liquid is vaporized. 5 is allowed to pass through and prevents permeation in a liquid state. The film body 5 is formed with a thickness of about 10 to 30 μm, for example, and the permeability of the freshness-retaining liquid (gas) is increased or decreased substantially in proportion to the thickness of the film body 5.

  Here, as a material of the hydrophilic film used for the film body 5, for example, a polyamide copolymer such as nylon 6, nylon 66, (610, 12), or ethylene / vinyl having an ethylene composition range of 20 to 50 mol%. Alcohol copolymers (for example, called eval) are mentioned. In addition, examples of the hydrophilic film material used for the film body 5 include cellophane, polyvinyl alcohol, polyvinyl butyral, and cellulose acetate (cellulose triacetate).

  And the film body 5 has a function which permits permeation | transmission in the state which vaporized freshness retention liquid by using the above hydrophilic films, and prevents permeation | transmission in a liquid state. Thereby, the laminated film 4 (film body 5) has the property of blocking the permeation of liquid, although having permeability to gas.

  Reference numeral 6 denotes a printing layer formed on the inner surface of the film body 5, and the printing layer 6 is formed by printing on the inner surface of the film body 5 using, for example, alcohol-resistant ink. On the inner surface of the film body 5, for example, a product name, a manufacturer name, an effect note, a cautionary note, and the like are printed by the printing layer 6 as necessary. Moreover, the thickness of the printing layer 6 is formed in about 2-7 micrometers.

  7 is a sealant layer formed on the inner surface of the film body 5 with the printing layer 6 in between. The sealant layer 7 is formed using, for example, an alcohol-resistant adhesive that ensures food hygiene. In this case, as the material of the sealant layer 7, a material having adhesive performance is used to form a sealing portion 9 described later on the peripheral portion 4 </ b> A of the laminated film 4 made of the film body 5. For this reason, the sealant layer 7 is formed of a resin material having a melting point lower than that of the material of the film body 5 and excellent heat sealability.

  And the sealant layer 7 is comprised by many strip | belt-shaped adhesive bond layers 7A, 7B etc. which make the lattice pattern formed in the inner surface of the film body 5 in the state which cross | intersects each other, for example as shown in FIG. Yes. That is, many strip | belt-shaped adhesive bond layers 7A are formed as a strip | belt-shaped adhesive bond layer extended mutually parallel on the surface of the film body 5 using means, such as gravure printing. The other multiple strip adhesive layers 7B are similarly formed, and the thickness of the sealant layer 7 is about 3 to 15 μm.

  Here, among the strip-shaped adhesive layers 7A and 7B shown in FIG. 5, for example, the strip-shaped adhesive layer 7A extending in the vertical direction has a minute width dimension a (for example, a = about 0.1 to 0.5 mm). The spacing dimension c is set to about 1.0 to 1.5 mm, for example. Further, the strip-like adhesive layer 7B extending in the lateral direction also has a minute width dimension b (for example, b = about 0.1 to 0.5 mm), and the interval dimension d is, for example, 1.0 to 1. It is set to about 5 mm.

  Thereby, even when each strip adhesive layer 7A, 7B of the sealant layer 7 has a high impermeability to gas (a freshness-retaining liquid which has been vaporized and gasified), each of these strip adhesive layers 7A, 7B. The freshness-retaining liquid gas can pass through the film body 5 through a lattice-like space 8 as a transmission space formed therebetween. Of the strip-like adhesive layers 7A and 7B of the sealant layer 7, for example, the strip-like adhesive layers 7A and 7B located near the peripheral edge 4A of the laminated film 4 are heated using means such as heat sealing. The sealing part 9 mentioned later is comprised by fuse | melting.

  9 is a sealing part formed on the side of the peripheral edge 4A of each laminated film 4, and these sealing parts 9 are composed of two sets sandwiching the adsorbent body 2 from the upper and lower sides as shown in FIGS. The laminated film 4 is sealed by four sides located on the outer edge side. That is, by applying a heat sealing means to the peripheral edge 4A side of the laminated film 4, the strip adhesive layers 7A and 7B of the sealant layer 7 are melted together between the upper and lower laminated films 4 and thermocompression-bonded ( Heat sealed).

  As a result, the upper and lower two laminated films 4 are hermetically sealed with the four sides positioned at the peripheral edge 4A serving as the sealing portion 9, and the packaging cover 3 that encloses and stores the adsorbent 2 therein is configured. To do. And the sealing part 9 which consists of a total of 4 sides seals so that the outer edge part side of each film body 5 may be sealed, for example, the freshness maintenance liquid in the adsorption body 2 leaks outside from the position of the sealing part 9. , To prevent volatilization.

  The food freshness holder 1 according to the present embodiment has the above-described configuration. Next, the freshness holding operation will be described.

  First, when the food freshness holder 1 is manufactured, for example, as shown in FIG. 2, a series of arrayed state in which a large number of food freshness holders 1 in a pouch shape are arranged in the vertical direction and the horizontal direction. It is manufactured in a so-called continuous packaging state. A large number of food freshness holders 1 arranged in a series of rows as described above are used as food freshness holders 1 in the form of rectangular sachets as shown in FIGS. It is cut individually.

  Next, the food freshness holder 1 made of one sachet thus manufactured is used by inserting one or a plurality of the food freshness holders 1 into a food package such as confectionery. In this state, the freshness retaining liquid impregnated in the adsorbent 2 of the food freshness holder 1 gradually evaporates in the packaging cover 3, and the volatile component (gas) of the gasified freshness retaining liquid is the laminated film 4. Is transmitted to the outside.

  In this case, when the volatilization component of the freshness-keeping liquid gasified in the packaging cover 3 permeates through the laminated film 4 (film body 5) in a gaseous state, if the volatilization speed of the freshness-holding liquid is excessively high, for example, food Alcohol is volatilized during the sealing process in the package (not shown), making it difficult to ensure the original freshness retention performance. On the other hand, when the volatilization rate of the freshness-keeping liquid is excessively slow, it takes time to achieve the freshness-keeping effect of the food in the food package, and the reliability as a food freshness-holding tool is lowered.

Therefore, the inventors, for the film body 5 used for the laminated film 4 constituting the packaging cover 3, the alcohol concentration (vol%) and the gas permeability per 1 m ² (g / m ² · 24 hr). ) Was investigated by individually testing a plurality of types of hydrophilic films.

  In this case, a characteristic line 11 shown by a solid line in FIG. 7 indicates characteristics when the film body 5 is formed using, for example, biaxially stretched nylon (hydrophilic film) called “super neil” manufactured by Mitsubishi Plastics. Yes. In addition, the thickness of the film body 5 made of this biaxially stretched nylon is, for example, 15 μm.

In the case of the film body 5 made of biaxially stretched nylon, for example, the alcohol concentration of the freshness-retaining liquid is sequentially changed within the range of 65 to 99%, and the permeability in the vaporized state (g / m ² · 24 hr). When the alcohol concentration is 95 to 99% as shown by the characteristic line 11 in FIG. 7, the transmittance becomes low, for example, less than 400 g. However, it was confirmed that when the alcohol concentration is gradually lowered to, for example, about 65%, the gas permeability can be increased to, for example, about 900 to 950 g as shown by the characteristic line 11.

For example, when the film body 5 is formed using non-stretched nylon (hydrophilic film) called “Diamilon CZ” manufactured by Mitsubishi Plastics, the characteristic line 12 indicated by a dotted line in FIG. The transmission characteristics were confirmed. In this case, the thickness of the film body 5 is 20 μm, for example, the alcohol concentration of the freshness-retaining liquid is sequentially changed within a range of 65 to 99%, and the permeability (g / m ² · 24 hr) in the vaporized state is examined. saw.

  In the case of non-stretched nylon, as indicated by the characteristic line 12 in FIG. 7, when the alcohol concentration is 99%, for example, the transmittance is 800 g before and after, and when the alcohol concentration is 95%, for example, 1400 g. The permeability increases to the extent. When the alcohol concentration is gradually decreased to about 65%, for example, it has been confirmed that the gas permeability increases to about 1800 g, for example, as shown by the characteristic line 12.

  Next, when the film body 5 is formed by using, for example, an ethylene / vinyl alcohol copolymer (hydrophilic film) called “EVAL” manufactured by Kuraray, along the characteristic line 13 shown by a one-dot chain line in FIG. The transmission characteristics were confirmed. In this case, the thickness of the film body 5 was examined as 15 μm. In this case, as indicated by the characteristic line 13 in FIG. 7, when the alcohol concentration is 95 to 99%, the transmittance is very low, for example, 100 g or less. However, it was confirmed that when the alcohol concentration is gradually lowered to about 65%, for example, as shown by the characteristic line 13, the gas permeability increases to, for example, close to 1000 g.

  Moreover, when the film body 5 was formed using a commercially available cellophane (hydrophilic film), the transmission characteristic along the characteristic line 14 shown by a two-dot chain line in FIG. 7 was confirmed. In this case, the thickness of the film body 5 was examined as 15 μm. In the case of cellophane, as shown by the characteristic line 14 in FIG. 7, when the alcohol concentration is 99%, for example, the transmittance is 300 g before and after, and when the alcohol concentration is 95%, for example, 700 to 800 g. The degree of transparency. When the alcohol concentration is gradually lowered to about 65%, for example, it has been confirmed that the gas permeability exceeds 4000 g, for example, as shown by the characteristic line 14 indicated by a two-dot chain line.

  Therefore, the present inventors paid attention to the material characteristics of the hydrophilic film used for the film body 5, the relationship between the thickness and the alcohol concentration of the freshness-retaining liquid, and for example, the transmission characteristics indicated by the characteristic lines 11 to 14 in FIG. With reference to the above, etc., it was studied to form a film body 5 satisfying a desired use for keeping freshness. As a result, for example, the freshness retention period for food (not shown) in the food package can be adjusted appropriately according to the application, and the volatilization rate of the freshness retaining liquid becomes excessively high or low. It is possible to suppress this.

  Thus, according to the present embodiment, when the food freshness holder 1 consisting of one sachet is taken as an example, the packaging cover 3 that covers the adsorbent 2 from the outside includes the upper and lower laminated films 4. They are formed by overlapping each other and sealing the peripheral edge 4A of the two laminated films 4 over four sides in this state. In an actual manufacturing process, a large number of freshness holders 1 are manufactured side by side in a continuous packaging state together with the packaging cover 3, and cut into a food freshness holder 1 consisting of one sachet at the final stage.

  The laminated film 4 is formed using a hydrophilic film made of a resin material, and a transparent or translucent film body 5 that allows the freshness-retaining liquid to permeate in a vaporized state and prevents permeation in a liquid state. The printed layer 6 formed by printing on the inner surface of the film body 5 and the film layer 5 provided on the inner surface of the film body 5 with the printed layer 6 sandwiched therebetween are adsorbed when the film body 5 is manufactured as a packaging cover. A sealant layer 7 that forms a sealing portion 9 on the film body 5 around the body 2 is constituted.

  For this reason, the gas volatilized from the freshness-retaining liquid previously impregnated in the adsorbent 2 can permeate through the film body 5 (hydrophilic film) of the packaging cover 3 (laminated film 4) and volatilize outside. Thereby, like the prior art, a freshness-keeping liquid can be volatilized outside without specially providing a volatilization opening or the like, and a freshness-keeping effect on foods and the like can be exhibited.

  Further, even if a forced external force or the like is applied to the adsorbent 2 from the outside of the packaging cover 3, the freshness-retaining liquid impregnated in the adsorbent 2 does not pass through the film body 5 in a liquid state. The freshness-keeping liquid can be stored inside the packaging cover 3 in an enclosed state, and the freshness-keeping liquid can be prevented from exuding to the outside in the liquid state by the packaging cover 3 made of the film body 5.

  In addition, by appropriately selecting and adjusting the material (material, thickness) of the hydrophilic film used for the film body 5 and the alcohol concentration of the freshness-retaining liquid, the freshness-retaining liquid gas is transferred from the adsorbent 2 to the packaging cover 3. The speed at the time of permeation | transmission and volatilization to the outer side can be optimized, for example, the holding | maintenance period by the freshness holder 1 with respect to the foodstuff (not shown) in a food packaging body can be adjusted appropriately.

  Therefore, according to the food freshness retainer 1 according to the present embodiment, the freshness retaining liquid impregnated in the adsorbent 2 can be prevented from oozing out of the packaging cover 3, and the life as the food freshness retainer 1 can be prevented. , Can increase the reliability. And as a hydrophilic film used for the film body 5, the film thickness is changed, for example, a material is appropriately selected from materials having transmission characteristics indicated by characteristic lines 11 to 14 in FIG. Can be adjusted.

  Thereby, the volatilization speed | velocity | rate when a freshness maintenance liquid volatilizes from the adsorption body 2 to the exterior of the packaging cover 3 (film body 5) can be adjusted appropriately. As a result, the commercial value of the food freshness holder 1 can be further increased, and the freshness of food and the like can be stably maintained over a long period of time.

  Moreover, since the packaging cover 3 of the food freshness holder 1 employed in the present embodiment has a structure in which the adsorbent 2 is completely wrapped from the outside and sealed by the four-side sealing portions 9, for example, food The adsorbent 2 does not come into direct contact with the food (not shown) in the package, and problems such as the freshness retaining liquid in the adsorbent 2 being absorbed by the food can be solved.

  On the other hand, for example, the printing layer 6 that prints a product name, a notice, etc. as necessary is formed by printing on the inner surface of the film body 5 using, for example, alcohol-resistant ink. For this reason, food safety in maintaining the freshness of food and the like can be ensured, and problems such as the ink used for the printing layer 6 oozing out of the packaging cover 3 can be eliminated.

  Also, the sealant layer 7 provided on the inner surface of the film body 5 with the printing layer 6 interposed therebetween can be formed using, for example, an alcohol-resistant adhesive that ensures food hygiene, and the film body 5 (lamination The sealant layer 7 (band-like adhesive layers 7A and 7B) located near the peripheral edge 4A of the film 4) forms the respective sealing portions 9 on the four sides of the packaging cover 3 to enclose the adsorbent 2 inside. I can leave.

  Moreover, since the sealant layer 7 is composed of a large number of strip-like adhesive layers 7A and 7B formed on the inner surface of the film body 5 in a grid pattern, the gas of the freshness-retaining liquid gasifies the sealant layer 7. Even when it cannot penetrate, the gas of the freshness-retaining liquid can be transmitted to the outside of the film body 5 from the lattice-like space 8 between the strip-like adhesive layers 7A and 7B, and the material selection width as the sealant layer 7 can be increased. Can be spread.

  In the first embodiment, the case where the sealant layer 7 is constituted by a large number of strip-like adhesive layers 7A and 7B and a large number of lattice-like spaces 8 are formed therebetween is described as an example. However, the present invention is not limited to this. For example, as in the modification shown in FIG. 8, the sealant layer 7 'is formed by a plurality of strip-like adhesive layers 7A' and 7B 'formed at intervals so as to intersect each other. It is good also as a structure which comprises and forms many rhombus-shaped space 8 'as transmission space among these.

  Next, FIGS. 9 and 10 show a second embodiment of the present invention. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. It shall be. However, the present embodiment is characterized in that the sealant layer 17 is provided on the inner surface of the film body 5 with the printing layer 6 interposed therebetween.

  Here, the sealant layer 17 used in the present embodiment is configured to be formed as a coating covering the entire inner surface of the film body 5 with the printing layer 6 interposed therebetween as shown in FIG. This is different from the embodiment. The sealant layer 17 is formed using a gas-permeable material so that the gas of the freshness-keeping liquid gasified passes through the sealant layer 17.

  The sealant layer 17 is formed using a resin material having a melting point lower than that of the material of the film body 5 and excellent in heat sealability, and is similar to the sealant layer 7 described in the first embodiment. 3, a sealing portion 9 on the four sides that encloses the adsorbent 2 is formed.

  Thus, even in the present embodiment configured as described above, it is possible to obtain substantially the same function and effect as in the first embodiment. In particular, in the present embodiment, the sealant layer 17 is allowed to pass through the gas. By using the material having the property, the inner surface of the film body 5 can be covered with the sealant layer 17 over the entire surface, and for example, the adhesive strength in the sealing portion 9 can be easily increased.

  Next, FIG. 11 to FIG. 15 show a third embodiment of the present invention. The feature of this embodiment is that a translucent nonwoven fabric layer is laminated on the outer surface of the film body constituting the packaging cover. It is in the configuration. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, 21 is a food freshness holder used in the present embodiment. The food freshness holder 21 is similar to the food freshness holder 1 described in the first embodiment, and the adsorbent 2 and the film. It is comprised by the packaging cover 22 which consists of the body 5 grade | etc.,. However, the food freshness holder 21 in this case is different from the first embodiment in that a nonwoven fabric layer 28 is added to a laminated film 23 described later.

  A packaging cover 22 covers the adsorbent body 2 from the outside. The packaging cover 22 is also configured in the same manner as the packaging cover 3 described in the first embodiment, and has four sides with the adsorbent body 2 inserted therein. It is continuously sealed by the sealing part 9. However, the packaging cover 22 in this case differs from the first embodiment in that a non-woven fabric layer 28 to be described later is added to the laminated film 23 as the material.

  Here, the laminated film 23 is formed by laminating a print layer 6 and a sealant layer 24 described later on the inner surface of the film body 5, and a nonwoven fabric layer 28 is formed on the outer surface of the film body 5 via an adhesive layer 26 described later. It is formed by stacking. The laminated film 23 is formed as a thin sheet having a rectangular shape with a size larger than that of the adsorbing body 2 in the same manner as the laminated film 4 (see FIG. 4) described in the first embodiment. The peripheral portion 23A side projecting in the direction (for example, front, rear direction and left, right direction) is sealed (heat sealed) by the sealing portion 9 in the upper and lower directions.

  Reference numeral 24 denotes a sealant layer formed on the inner surface of the film body 5 with the printing layer 6 interposed therebetween. The sealant layer 24 is configured in the same manner as the sealant layer 7 described in the first embodiment and is thermally welded. Thus, the sealing portion 9 is formed in the peripheral portion 23A of the laminated film 23. The sealant layer 24 is constituted by a number of strip-like adhesive layers 24A, 24B and the like formed on the inner surface of the film body 5 in a lattice pattern as shown in FIG. 13, for example. ˜15 μm.

  These strip-like adhesive layers 24A and 24B are formed with minute width dimensions a and b and spacing dimensions c and d, respectively, like the strip-like adhesive layers 7A and 7B described in the first embodiment. Has been. And the gas of the freshness-retaining liquid can permeate the film body 5 through a lattice-like space 25 as a permeation space formed between each of the belt-like adhesive layers 24A and 24B.

  Reference numeral 26 denotes an adhesive layer formed on the outer surface of the film body 5, and the adhesive layer 26 is formed of, for example, an alcohol-resistant adhesive that ensures food hygiene, and a non-woven fabric layer 28 described later is attached to the film body 5. It is used for laminating on the outer side surface. And the adhesive layer 26 is comprised by many strip | belt-shaped adhesive bond layers 26A, 26B etc. which were formed in the outer surface of the film body 5 in the lattice pattern as shown, for example in FIG. It is formed to about 15 μm.

  Here, the strip-shaped adhesive layers 26 </ b> A and 26 </ b> B extend in a different direction from the strip-shaped adhesive layers 24 </ b> A and 24 </ b> B of the sealant layer 24. And the lattice-like or rhombus-shaped space 27 (see FIG. 14) partitioned between the respective strip-like adhesive layers 26A and 26B is the lattice-like space 25 (see FIG. 13) partitioned between the respective strip-like adhesive layers 24A and 24B. ) So that a sufficient transmission space can be secured when the freshness-retaining liquid gas passes through the film body 5.

  That is, as shown in FIG. 14, for example, one of the belt-like adhesive layers 26 </ b> A extending obliquely at an inclination angle of 45 degrees has a minute width dimension e (for example, e = about 0.1 to 0.5 mm). The gap dimension g is set to about 2.5 to 3.5 mm, for example. Also, the other belt-like adhesive layer 26B extending at an angle of 45 degrees in the opposite direction to the one belt-like adhesive layer 26A also has a minute width dimension f (for example, f = about 0.1 to 0.5 mm). ), And the interval dimension h is set to about 2.5 to 3.5 mm, for example.

  Thereby, even when each belt-like adhesive layer 26A, 26B of the adhesive layer 26 has high impermeability to gas (freshness-retaining liquid that has been vaporized and gasified), each of these belt-like adhesive layers 26A, 26B. The freshness-retaining liquid gas can be transmitted to the outside of the film body 5 through the rhombus-shaped space 27 formed as a transmission space therebetween. And the below-mentioned nonwoven fabric layer 28 is laminated | stacked on the outer surface of the film body 5 by each strip | belt-shaped adhesive bond layers 26A and 26B of the contact bonding layer 26. FIG. In addition, it is good also as a structure which forms many strip | belt-shaped adhesive bond layers 26A and 26B so that it may extend in the same direction as each strip | belt-shaped adhesive bond layers 24A and 24B of the sealant layer 24.

  28 shows a translucent nonwoven fabric layer constituting the laminated film 23 together with the film body 5 and the like. The nonwoven fabric layer 28 has the same size as the film body 5, and the adhesive layer 26 is provided on the outer surface of the film body 5. Are integrated (laminated) so as to be bonded together. And the film-form raw material which comprises the nonwoven fabric layer 28 is, for example, polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE) or vinyl chloride, or a combination of two or more of these materials selectively It is formed by using a gas permeable material in which fine fibers made of synthetic resin or the like are entangled to form a cloth or a thin sheet.

  Here, the non-woven fabric layer 28 has a property that allows gas to permeate inside and outside, and allows liquid to some extent. The non-woven fabric layer 28 covers the entire outer surface of the film body 5 to reinforce the film body 5 and suppresses glossiness on the outer surface of the film body 5 from the outside by the translucent non-woven fabric layer 28. The cover 22 (food freshness holder 21) has a function of enhancing the appearance and commercial value.

  Thus, also in the present embodiment configured as described above, the laminated film 23 which is the material of the packaging cover 22 is composed of the film body 5 made of a hydrophilic film, the sealant layer 24, the adhesive layer 26 and the nonwoven fabric layer 28. Thus, the freshness-retaining liquid can be gradually volatilized from the adsorbent 2 to the outside of the packaging cover 22, and almost the same effect as that of the first embodiment can be obtained.

  Here, as shown in FIG. 12, the laminated film 23 employed in the third embodiment has a sealant on the inner side surface (surface side facing the adsorbent body 2 above and below) of the film body 5 made of a hydrophilic film. The layer 24 is formed. For example, the adhesive layer 26 is formed on the outer surface of the film body 5 by using a discharge nozzle means (not shown) having a comb-like shape. And the nonwoven fabric layer 28 is covered from the upper side of the adhesive layer 26, and the nonwoven fabric layer 28 is laminated on the outer surface of the film body 5 in this state, and the sealant layer 24, the film body 5, the adhesive layer 26 and the nonwoven fabric layer 28 are integrated. The laminated film 23 thus formed is formed.

  Next, the laminated film 23 manufactured in this way is prepared, for example, as a pair of upper and lower sheets, and sandwiches the adsorbent body 2 from both the upper and lower sides, and seals the four sides thereof with sealing portions. By forming 9, the adsorbent 2 is wrapped as a packaging cover 22 in a state of being completely sealed from the outside.

  Moreover, even when manufacturing the food freshness holder 21 according to the third embodiment, as in the food freshness holder 1 (see FIG. 2) having a pouch shape described in the first embodiment, Manufactured in a series of rows (continuous packaging) arranged in a row in the horizontal direction. And many food freshness holders 21 which became the state of the continuous packaging in this way are cut individually as the food freshness holder 21 (refer FIG. 11) which makes a rectangular pouch shape by the cutting process of a production line, etc. Is.

  However, in the third embodiment, the nonwoven fabric layer 28 is laminated on the outer surface of the film body 5 via the adhesive layer 26, thereby forming the laminated film 23 (packaging cover 22). For this reason, while being able to reinforce the film body 5 with the nonwoven fabric layer 28, the glossiness in the outer surface of the film body 5 can be suppressed from the outside by the translucent nonwoven fabric layer 28, and the packaging cover 22 (food freshness holder 21) As a product, the product value can be increased.

  Further, if the user has a misunderstanding that the surface of the film body 5 is wet due to the glossiness, this gives the impression that the freshness-retaining liquid inside has exuded to the outside of the packaging cover 22. . However, in the food freshness holder 21 according to the present embodiment, the glossiness can be eliminated by the non-woven fabric layer 28 by covering the outer surface of the film body 5 with the translucent non-woven fabric layer 28, and the user misunderstands. Can be eliminated.

  Moreover, the adhesive layer 26 used to integrate the nonwoven fabric layer 28 on the outer surface of the film body 5 has a number of strip adhesives extending in a different direction from the strip adhesive layers 24A and 24B of the sealant layer 24. The layers 26A and 26B are used. And the rhombus-shaped space 27 (see FIG. 14) between the belt-like adhesive layers 26A and 26B is formed in a larger area than the lattice-like space 25 (see FIG. 13) between the belt-like adhesive layers 24A and 24B. Yes.

  For this reason, the permeation space when the gas of the freshness-retaining liquid permeates to the outside (nonwoven fabric layer 28 side) of the film body 5 is sufficiently secured by the rhombus-shaped space 27 between the strip-like adhesive layers 26A and 26B. The volatilization rate of the freshness-retaining liquid can be adjusted in accordance with the material characteristics of the film body 5. Furthermore, the amount of the adhesive used for the adhesive layer 26 can be reduced, and the material cost can be reduced.

  Next, FIG. 16 shows a fourth embodiment of the present invention. In this embodiment, the same components as those of the third embodiment are denoted by the same reference numerals, and the description thereof is omitted. To do. However, the present embodiment is characterized in that the sealant layer 31 is provided on the inner surface of the film body 5 with the printing layer 6 interposed therebetween.

  Here, the sealant layer 31 used in the present embodiment is configured to be formed as a coating covering the entire inner surface of the film body 5 with the printing layer 6 interposed therebetween as shown in FIG. This is different from the embodiment. The sealant layer 31 is formed using a gas-permeable material so that the gas of the freshness-retaining liquid gasified passes through the sealant layer 31. Further, the sealant layer 31 is formed using a resin material having a lower melting point than the material of the film body 5 and excellent heat sealability, and is similar to the sealant layer 24 described in the third embodiment. The sealing part 9 on the four sides that encloses the adsorbent 2 is formed in 22.

  In the present embodiment, the adhesive layer 32 provided on the outer surface of the film body 5 is also formed using an adhesive resin material having gas permeability. The adhesive layer 32 is formed of an alcohol-resistant adhesive or the like that ensures food hygiene as in the case of the adhesive layer 26 described in the third embodiment. It is used for laminating on the side.

  However, since the adhesive layer 32 in this case uses an adhesive resin material having gas permeability as described above, the entire outer surface of the film body 5 is covered between the film body 5 and the nonwoven fabric layer 28. It is different from the third embodiment in that it is formed.

  Thus, even in the present embodiment configured as described above, it is possible to obtain substantially the same function and effect as in the third embodiment. In particular, in the present embodiment, the sealant layer 31 and the adhesive layer 32 using a gas permeable material, the inner surface and the outer surface of the film body 5 can be covered with the sealant layer 31 and the adhesive layer 32 over the entire surface. The adhesive strength can be easily increased, and the adhesive strength between the film body 5 and the nonwoven fabric layer 28 can also be increased.

  Next, FIG. 17 shows a fifth embodiment of the present invention. The feature of this embodiment is that a freshness-retaining liquid is provided in a packaging state in a liquid state. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, 41 is a food freshness holder used in the present embodiment, and the food freshness holder 41 does not use the adsorbent 2 as in the food freshness holder 1 described in the first embodiment. The freshness retaining liquid 40 is directly enclosed in a packaging cover 42 described later.

  In this case, as described in the first embodiment, for example, an alcohol aqueous solution in which ethyl alcohol is 30 to 99 vol%, preferably 55 to 95 vol%, is used for the freshness retaining liquid 40. Such freshness-keeping liquid 40 is gradually volatilized in the packaging cover 42, becomes a gaseous state, and is volatilized to the outside through the film body 5.

  42 shows the packaging cover employ | adopted by this Embodiment, This packaging cover 42 is comprised using the laminated | multilayer film 4 similarly to the packaging cover 3 described in 1st Embodiment. The laminated film 4 is formed by laminating a printing layer 6 (see FIG. 6) and a sealant layer 7 on the inner surface of the film body 5 as described in the first embodiment. .

  43 is a sealing portion formed on the side of the peripheral edge 4A of each laminated film 4, and these sealing portions 43 are located on the outer edge side of, for example, two laminated films 4 superimposed on the top and bottom. It is formed by sealing on four sides. As a result, the upper and lower two laminated films 4 are sealed with the four sides positioned at the peripheral edge portion 4A serving as the sealing portions 43, and the packaging cover 42 that encloses and stores the freshness-retaining liquid 40 therein. It constitutes.

  Thus, in the present embodiment configured as described above, the volatile freshness-keeping liquid 40 is sealed in a liquid state in the packaging cover 42 including the film body 5, the printing layer 6, and the sealant layer 7. For this reason, for example, the adsorbent 2 used in the first embodiment can be eliminated, the number of parts can be reduced, and the manufacturing process can be simplified.

  Moreover, in the fifth embodiment as described above, the freshness retaining liquid 40 in the packaging cover 42 is in a liquid state by forming the laminated film 4 and the packaging cover 42 using the film body 5 made of a hydrophilic film. The freshness of foods and the like can be stably maintained for a long period of time, and the commercial value of the food freshness holder 41 can be increased.

  And the sealing part 43 which consists of a total of 4 sides provided in the outer edge part of the packaging cover 42 seals so that the outer edge part side of each film body 5 may be sealed, and the freshness maintenance accommodated as a liquid in the packaging cover 42 It is possible to prevent the liquid 40 from leaking from the position of the sealing portion 43 to the outside or volatilizing.

  Next, FIG. 18 shows a sixth embodiment of the present invention. The feature of this embodiment is that a freshness-retaining liquid is enclosed in a packaging cover having a nonwoven fabric layer. In the present embodiment, the same components as those in the third embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the figure, 51 is a food freshness holder used in the present embodiment, and the food freshness holder 51 does not use the adsorbent 2 like the food freshness holder 21 described in the third embodiment. The freshness retaining liquid 40 is directly enclosed in a packaging cover 52 described later. The freshness-retaining liquid 40 in this case is the same as that described in the fifth embodiment.

  52 shows the packaging cover employ | adopted by this Embodiment, This packaging cover 52 is comprised using the laminated | multilayer film 23 similarly to the packaging cover 22 described in 3rd Embodiment. As described in the third embodiment, the laminated film 23 is formed by laminating the printing layer 6 (see FIG. 15) and the sealant layer 24 on the inner surface of the film body 5, and the outer surface of the film body 5. Is formed by laminating a non-woven fabric layer 28 via an adhesive layer 26.

  53 is a sealing portion formed on the side of the peripheral edge 23A of each laminated film 23. These sealing portions 53 are positioned on the outer edge side of, for example, two laminated films 23 that are stacked one above the other. It is formed by sealing on four sides. As a result, the upper and lower laminated films 23 are sealed with the four sides positioned at the peripheral edge portion 23 </ b> A serving as a sealing portion 53, and the packaging cover 52 that encloses and stores the freshness-retaining liquid 40 therein. It constitutes.

  Thus, in this embodiment configured as described above, the volatile property is formed in the packaging cover 52 formed by using the laminated film 23 including the film body 5, the printed layer 6, the sealant layer 24, the adhesive layer 26 and the nonwoven fabric layer 28. The freshness-retaining liquid 40 is sealed in a liquid state. For this reason, for example, the adsorbent 2 used in the first to third embodiments can be made unnecessary, and the number of parts can be reduced to simplify the manufacturing process.

  In addition, the packaging cover 52 in which the freshness-keeping liquid 40 is encapsulated has the nonwoven fabric layer 28 laminated on the outer surface of the film body 5 with the adhesive layer 26 interposed therebetween. Glossiness can be suppressed by the translucent nonwoven fabric layer 28, and the packaging cover 52 (food freshness holder 51) can be improved in appearance and commercial value.

  In the first and fifth embodiments, the sealant layer 7 is composed of a large number of strip-like adhesive layers 7A and 7B, and a large number of lattice-like spaces 8 are formed between them as an example. explained. However, the present invention is not limited to this. For example, a large number of transmission spaces having a zigzag pattern or a polka dot pattern may be formed in the sealant layer. The permeation space in this case may be formed in various shapes such as a circle, an ellipse, a triangle, and a polygon as long as it can pass through the gas of the freshness-retaining liquid. In this regard, the same change can be made for the sealant layer 24 described in the third and sixth embodiments.

  On the other hand, the adhesive layer 26 described in the third and sixth embodiments also has a transparent space having various shapes such as a circle, an ellipse, a triangle, and a polygon, for example, instead of the large number of rhombus-shaped spaces 27. It is good also as a structure which forms. In this case, the transmission space may be formed in an area larger than the transmission space on the sealant layer side.

  In the first embodiment, as illustrated in FIG. 4, the case where the adsorbent 2 is sandwiched between the upper and lower sides by the two laminated films 4 has been described as an example. . However, the present invention is not limited to this. For example, the packaging cover may be formed by wrapping the adsorbent from the outside using a single laminated film. Similar changes can be made in the second to sixth embodiments.

  In the first embodiment, the case where the film body 5 is formed of one hydrophilic film has been described as an example. However, the present invention is not limited to this. For example, the film body may be formed of a laminate film formed by laminating two or three films. And the film body in this case may be formed by laminating (laminating) the same kind of hydrophilic film material, for example, or a different kind of film material may be selected to constitute a laminated film. This point is the same for the second to sixth embodiments.

  Moreover, in the said 1st Embodiment, the case where the adsorption body 2 and the packaging cover 3 (laminated film 4) were formed in rectangular shape was mentioned as an example, and was demonstrated. However, the present invention is not limited to this, and for example, the adsorbent may be formed of a flat plate or cylinder having a polygonal shape such as a triangle, a square, a trapezoid, or a pentagon, and the packaging cover is similarly modified. Is possible. This point is the same in the second to fourth embodiments, and the same changes can be made to the packaging covers 42 and 52 described in the fifth and sixth embodiments.

  Furthermore, in the said 1st Embodiment, the case where the adsorbent 2 was comprised using the high adsorptive virgin pulp material etc. was mentioned as an example, and was demonstrated. However, the present invention is not limited to this, and the adsorbent may be configured using, for example, paper made of cardboard, filter paper, etc., or a porous absorbent made of sponge, silica gel, zeolite, or the like. This also applies to the second to fourth embodiments.

1, 21, 41, 51 Food freshness holder 2 Adsorbent 3, 22, 42, 52 Packaging cover 4, 23 Laminated film 5 Film 6 Printed layer 7, 7 ', 17, 24, 31 Sealant layer 7A, 7B, 7A ', 7B', 24A, 24B, 26A, 26B Strip adhesive layer 8, 25 Lattice space (transmission space)
8 ', 27 diamond-shaped space (transmission space)
9, 43, 53 Sealing portion 26, 32 Adhesive layer 28 Non-woven fabric layer 40 Freshness retaining liquid

Claims (4)

Volatile freshness-preserving liquid containing alcohol for maintaining the freshness of food or other stored objects, an adsorbent adsorbed in an impregnated state with the freshness-maintaining liquid, and a packaging cover that covers the adsorbent from the outside In a food freshness holding tool consisting of
The packaging cover is formed using a hydrophilic film made of a resin material, and allows the freshness-retaining liquid to permeate in a vaporized state and prevent permeation in a liquid state, and the film body A printed layer formed by printing on the inner surface of the film, and provided around the inner surface of the film body with the printed layer interposed therebetween, and when the film body is manufactured as the packaging cover, around the adsorbent A food freshness holder characterized by comprising a sealant layer that forms a sealing portion on a film body. A volatile freshness-keeping liquid containing alcohol to maintain the freshness of food or other stored objects, and a packaging cover in which the freshness-keeping liquid is sealed in a liquid state;
The packaging cover is formed using a hydrophilic film made of a resin material, and allows the freshness-retaining liquid to permeate in a vaporized state and prevent permeation in a liquid state, and the film body A printing layer formed by printing on the inner surface of the film, and the freshness-retaining liquid is enclosed when the film body is provided as the packaging cover provided on the inner surface of the film body across the printing layer. A food freshness holder comprising a sealant layer for forming a sealing portion on the film body.   The food freshness retainer according to claim 1 or 2, wherein the packaging cover is provided with a translucent nonwoven fabric layer laminated on an outer surface of the film body via an adhesive layer.   The food freshness retainer according to claim 1, 2 or 3, wherein the sealant layer is constituted by a number of strip-like adhesive layers formed on the inner surface of the film body so as to intersect with each other.

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