JP2002347852A - Drip absorbing sheet for packaging perishable food - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drip absorbing sheet, the appropriate surface of which to be placed on the internal surface of a film when packaging with the film can be simply identified, an opposite surface if placed on a side of food can be easily identified from the outside even after packaging, and an identification tag which is easily identified by a consumer or gives no sense of incongruity after drips are absorbed. SOLUTION: The drip absorbing sheet for packaging perishable food comprises a packaging material wherein one of external surfaces is made of a liquid-permeable film and the other surface is made of a liquid-impermeable film or a semi-liquid-permeable film, and a sheet-formed drip absorbing material containing a water-absorbing polymer and/or a wetting agent incorporated in the packaging material. An identification tag with a color of a similar shade to that of the perishable food is provided on at least a portion of one of sides of the drip absorbing sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for storing or distributing fresh food such as meat, vegetables, fruits and fish to absorb and remove exuded drip and prevent discoloration and deterioration in quality of the fresh food for a long period of time. And a liquid absorbing sheet for packaging fresh food. More specifically, when using the liquid absorbing sheet for fresh food packaging, it is possible to prevent misuse of the front and back surfaces of the liquid absorbing sheet, and to provide an identification mark that does not cause uncomfortable feeling even after liquid absorption, and a fresh sheet using the liquid absorbing sheet. The present invention relates to a method for manufacturing a food product.

[0002]

2. Description of the Related Art Fresh foods such as meat and fish (hereinafter sometimes simply referred to as "foods") are vacuum-packaged with a non-breathable film and then stored in a chilled temperature zone or when thawed after frozen storage. In such cases, a liquid called so-called drip, such as blood or body fluid, oozes out. This drip accumulates between the food and the non-breathable film, and if left unchecked, these deteriorate the quality of the contacted food, such as discoloration,
Significantly lowers product value. In order to avoid this, excluding the discolored portion of the food, the yield of the product is reduced accordingly. In addition, the drip has many problems such as a breeding ground for bacteria and a short storage period.

[0003] Therefore, a method of removing drip from fresh packaged food has been studied. At the beginning of the removing method, the food is packed in a state of being in contact with the sheet-like liquid absorbing material, and the drip leaching during storage is absorbed by the liquid absorbing material as needed to remove the drip. As the liquid absorbing material, a capillary liquid absorbing material such as paper pulp which has a hydrophilic surface and can absorb and hold a drip by a capillary phenomenon, a so-called polymer water absorbing agent, or a composite thereof is used. However, the capillary liquid absorbent material has low strength as a sheet material, and the polymer water absorbent is generally powdery or granular, and there is a problem in direct contact with food. The liquid absorbing sheet for fresh food packaging (hereinafter sometimes simply referred to as “liquid absorbing sheet”) covered with a liquid permeable film was proposed, and dripping measures were greatly improved. However, the liquid absorbing sheet not only dries out from food such as meat and fish, but also actively absorbs the moisture inside the food from the contact surface of the food, so that the food itself may be dried.

[0004] As an improved liquid absorbing sheet, the food itself is dried by absorbing only drip leached from food such as meat and fish, and not actively absorbing moisture inside the food from the contact surface of the food. And absorbs and removes drip that oozes out and accumulates at the bottom, recess, etc., of the food where the liquid-absorbent sheet is in contact with the food, preventing discoloration and quality deterioration of the food for a long period of time and maintaining the yield In order to be able to use a liquid-permeable film on one side, a liquid-absorbent sheet using a cover-like packaging material using a non-liquid-permeable film or a semi-liquid-permeable film on the other side has been proposed. I have.

[0005] This liquid absorbing sheet is used such that the surface of a liquid-impermeable film or a semi-liquid-permeable film is brought into contact with food in order to avoid direct or local absorption of moisture from inside the food. Will be. For this reason, coloring or printing has been devised on the sheet-shaped liquid absorbing material to identify the front and back, but in order to improve the feeling received by the consumer and the appearance of the product, the color / Since patterns and the like have been avoided, the distinctiveness of the front and back surfaces has been reduced, and packaging has often occurred such that the liquid-permeable film surface, which is the opposite surface, is in direct contact with food. Once such packaging has been made, it has been difficult to easily detect it from the outside.

[0006]

SUMMARY OF THE INVENTION According to the present invention, when wrapping with a non-breathable film or the like, an appropriate surface of a liquid-absorbing sheet disposed on an inner surface thereof can be easily identified so that the food side is provided. In addition, when the opposite side is placed on the food side, it is easily identifiable from the outside even after packaging, and after the liquid is absorbed, a suction tag with an identification mark that is difficult for the consumer to identify or that does not cause discomfort is attached. The purpose is to develop a liquid sheet.

[0007]

According to the present invention, there is provided [1] a packaging material having one outer surface formed of a liquid-permeable film and the other outer surface formed of a non-liquid-permeable film or a semi-liquid-permeable film. What is claimed is: 1. A liquid absorbing sheet for packaging fresh food containing a sheet-shaped liquid absorbing material containing a molecular absorbent and / or a wetting agent, wherein at least a part of one side of the liquid absorbing sheet has a color similar to that of the fresh food. [2] A liquid absorbing sheet for fresh food packaging used for beef packaging, characterized by being provided with an identification mark of (1), wherein the color is reddish. [1] The absorbent sheet for packaging fresh food according to [1], [3] The absorbent sheet for packaging fresh food used for packaging vegetables or fruits, wherein the color is green, yellow or brown. The liquid absorbing sheet for packaging fresh food according to [1], The absorbent sheet for packaging fresh food according to [1], which is a liquid absorbing sheet for packaging fresh food used for packaging of poultry, pork or fish, and has a pink, yellow or brown color. ,

[5] The liquid absorbent for fresh food packaging according to any of [1] to [4], wherein the identification mark is provided on the side of the non-permeable film or the semi-permeable film. [6] The liquid-absorbent sheet for packaging fresh food according to any one of [1] to [4], wherein the identification mark is provided on the liquid-permeable film side.

[7] The liquid-absorbent sheet for packaging fresh food according to any one of [1] to [6], wherein the semi-permeable film is a polyethylene film or a polypropylene film having openings formed therein [8] ] The sheet-shaped liquid absorbing material is made of ethylene glycol, propylene glycol, diethylene glycol monoethyl ether, 1,3 as a wetting agent.
-Butylene glycol, glycerin, polyethylene glycol, polypropylene glycol, polyglycerin,
The liquid absorbing sheet for packaging fresh food according to any one of [1] to [7], comprising at least one member selected from the group consisting of xylitol, sorbitol, maltitol, methylcellulose, and carboxymethylcellulose, [9] The non-permeable film or semi-permeable liquid of the liquid-absorbent sheet for packaging fresh food according to any one of [1], [2], [4], [5], [7] and [8]. A method for producing a fresh food product, comprising a step of bringing a liquid into contact with a surface of a film, vacuum-packing with a non-breathable film, and absorbing liquid.
0] causing the fresh food to face the liquid-permeable film side of the absorbent sheet for packaging fresh food according to any one of [1], [3], [4], and [6] to [8], The above object has been achieved by developing a method for producing a fresh food product, which comprises a step of packaging and absorbing liquid.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One of the packaging materials used in the liquid absorbing sheet of the present invention is a liquid-permeable film, and the other is a non-liquid-permeable film or a semi-liquid-permeable film.

The liquid-permeable film used in the liquid-absorbing sheet of the present invention has water permeability and water resistance, and has pores large enough to prevent leakage of a liquid-absorbing material, especially a powdery polymer water-absorbing agent. Any of those generally heat-sealable and acceptable for food packaging may be used. For example, it may be formed from any one of the group consisting of woven fabric, knitted fabric, and nonwoven fabric such as natural fiber, semi-synthetic fiber, synthetic fiber, and synthetic resin, or a laminate thereof. Also, polyethylene film,
Non-permeable films such as polypropylene films, polyester films, and moisture-proof cellophane having fine communication holes formed by known mechanical or electrical means or laser or the like, communication hole expanded polyethylene sheets and mesh sheets. You may. Such a liquid-permeable film is so-called water-permeable, generally has a porosity of 1% or more, and is clearly distinguished from a semi-liquid-permeable film. This liquid-permeable film leaches from the surface of the food that the liquid-absorbing sheet is not in contact with, causing vibration during transportation,
It is provided to allow the drip moved to the water absorbing sheet due to gravity or the like to quickly permeate and absorb inside the water absorbing sheet.

As the liquid-impermeable film used on the opposite surface of the liquid-permeable film, for example, a polyethylene film,
Examples thereof include a polypropylene film, a polyvinylidene chloride film, a polyester film, moisture-proof cellophane, and a polyethylene-laminated aluminum foil. Above all, polyethylene film or polypropylene film does not contain substances that may contaminate food, does not generate, does not itself have water absorption or water permeability, is flexible, has good peelability from crimped food It is particularly preferable because it has heat sealing properties and is inexpensive.

The semi-permeable film can be produced by forming openings in the above-described non-permeable film by known mechanical or electrical means or laser. However, unlike the liquid-permeable film, the water permeability must be extremely small and have a limited porosity. That is, the diameter d of the opening is in the range of 0.05 mm to 0.5 mm, preferably in the range of 0.1 mm to 0.3 mm, and the opening ratio P is 0.01% to 0.4%. It is formed within the range, preferably within the range of 0.01% to 0.2%. Preferably, the openings are uniformly distributed throughout the semi-liquid permeable film. The shape of the opening is not particularly limited as long as it is within the range of the above-mentioned hole diameter and opening ratio.

Here, the porosity P is a% value represented by (total area of porosity / total area of semi-permeable film) × 100. When the area s of each porosity is the same, It is given by (opening area s per opening s × opening number n × 100) / (total area of semi-liquid permeable film).

Using the liquid-absorbing sheet of the present invention, a food is brought into contact with the surface of a liquid-impermeable film or a semi-liquid-permeable film,
In the case where the whole is vacuum-packaged with an air-impermeable film and stored, drip leaching from food in contact with the semi-permeable film is introduced into the liquid absorbing sheet through the opening. Therefore, in order to absorb only the drip without dehydrating the food in contact with the food, the pore diameter d is set to be 0.
Those having a range of from 05 to 0.5 mm are preferred.

It is preferable that both the liquid-permeable film and the liquid-impermeable film or the semi-liquid-permeable film are heat-sealing and form one surface of the liquid-absorbent sheet packaging material. By heat-sealing the peripheral portions of both films, it is possible to prevent separation of the liquid absorbing sheet between the films and prevent leakage of the built-in polymer water absorbing agent or the like.

The sheet-shaped liquid-absorbing material is used for absorbing the drip oozing from the food, and may be any material as long as it does not adversely affect the human body when storing the food. It is desirable that the sheet-shaped liquid-absorbing material does not release drip or water once absorbed by pressure or the like,
For that purpose, it is preferable to include a polymer absorbent such as a polymer water-absorbing agent. As the polymer water-absorbing agent used for the sheet-shaped liquid-absorbing material, any known water-absorbing agent may be used as long as it has a capability of absorbing moisture and drip and is acceptable in food safety. These are generally three-dimensionally cross-linked water-soluble polymers, and many types are known.

Preferred polymer water-absorbing agents include polysaccharides such as starch and cellulose, as well as acrylic acid, methacrylic acid, acrylate, methacrylate, acrylate, methacrylate, acrylamide, methacrylamide, acrylonitrile. A polymer obtained by subjecting one or more members selected from the group consisting of methacrylonitrile, maleic acid, sulfonated styrene, polyvinylpyridine and oligomers or cooligomers thereof to graft polymerization or graft polymerization and then hydrolysis. Cross-linked products,
Polyethylene oxide, polypropylene oxide,
Polyvinylpyrrolidone, sulfonated polyethylene, polyvinylpyridine, polyacrylate, polymethacrylate, polyacrylamide, polymethacrylamide, a crosslinked product of at least one of the group consisting of vinyl acetate-acrylate Polymer, isobutylene-maleic anhydride copolymer, polyvinyl alcohol-maleic acid copolymer, carboxymethylcellulose cross-linked product, and the like. 402A (manufactured by Showa Denko KK), Sunwet IM-300 (manufactured by Sanyo Chemical Industries, Ltd.),
Aqua Keep 10SH (manufactured by Iron and Steel Chemical Industry Co., Ltd.) and Aqualic CA (manufactured by Nippon Shokubai Chemical Industry Co., Ltd.) can be exemplified.

The sheet-shaped liquid-absorbing material of the present invention is preferably one in which the above-described polymer water-absorbing agent is sandwiched between capillary liquid-absorbing materials capable of absorbing liquid by capillary action. As the capillary liquid absorbing material, a sheet-like formed material capable of absorbing drip or moisture by capillary action and holding them, and holding the polymer water-absorbing agent or more preferably a wetting agent described later. It is. Examples include paper, pulp, pulp sheets in the form of pulp, absorbent cotton, gauze, woven fabric, knitted fabric, nonwoven fabric, sponge, communicating hole polyurethane foam, communicating hole viscose foam, communicating hole vinylon foam, and the like. Can be.

Since the polymeric water-absorbing agent is generally in the form of powder or granules when dried, it is necessary to incorporate the polymer into a liquid-absorbing sheet.
The layers may be sandwiched between the layers of the capillary absorbent material in a layered manner, or may be inserted into the communication holes of one layer of the capillary absorbent material and clamped. A commercially available product in which a polymer water-absorbing agent is sandwiched between capillary liquid-absorbing materials, for example, a highly water-absorbing sheet used in the fields of disposable diapers, sanitary treatment products, soil conditioners and the like can also be used as the liquid-absorbing material.

The polymer water-absorbing agent irreversibly absorbs drip and moisture that have passed through the openings of the semi-permeable film and the fine communication holes of the liquid-permeable film, and further have passed through the layer of the capillary absorbent material. However, unlike ordinary capillary liquid-absorbing materials, once they absorb water, they do not flow backward even when external pressure or impact is applied.

In the present invention, the sheet-shaped liquid absorbing material preferably contains a wetting agent. Generally, the polymer absorbent becomes hard when dried, and may damage the packaging material film or the non-breathable film that wraps the entire food due to impact or friction during transportation or movement. The addition of a wetting agent keeps the polymer water-absorbing agent flexible even during drying, thus preventing such damage and reducing, for example, the pinhole ratio of a non-breathable film for vacuum packaging.

When the above-mentioned capillary liquid-absorbing material has a hydrophobic surface, the initial water absorption is generally poor. However, if the hydrophobic surface is wet and covered, the initial water absorption is greatly improved.
The drip and moisture introduced from the opening of the semi-liquid permeable film or the fine communication hole of the liquid permeable film can be quickly absorbed. The amount of the wetting agent used is not particularly limited as long as it makes the liquid absorbing material soft and does not substantially leak even under pressure. The appropriate amount is experimentally determined in consideration of the material and configuration of the liquid absorbing material used, the total area of the capillary wall, and the like.

Examples of the wetting agent include polyhydric alcohols such as ethylene glycol, propylene glycol, diethylene glycol monoethyl ether, 1,3-butylene glycol and glycerin, and polyhydric alcohols such as polyethylene glycol, polypropylene glycol and polyglycerin. Polymers, sugar alcohols such as xylitol, sorbitol and maltitol, methylcellulose, carboxymethylcellulose and the like can be mentioned. These are used in the form of an aqueous solution as required. Glycerin is particularly preferred from the viewpoint of wettability and safety.

When a food and a liquid-absorbent sheet are vacuum-packaged using a non-breathable film and absorbed to produce a fresh food product, the food and the liquid-absorbent sheet are used in close contact with each other. It is preferable that the food is brought into contact with the surface of the liquid impermeable film or semi-liquid permeable film of the liquid absorbing sheet. By doing so, it is possible to prevent the liquid-permeable film from contacting the food and drying the food itself. When packaging a food and a liquid-absorbent sheet by a packaging method other than vacuum packaging and absorbing the liquid to produce a fresh food product, the reverse of the vacuum packaging is to place the liquid-absorbent sheet on the liquid-permeable film side. It is preferable to arrange and package the food so that they face each other. By doing so, the liquid can be absorbed more quickly than when the liquid absorbing sheet is arranged so that the side of the liquid-impermeable film or the semi-liquid-permeable film faces the food. As mentioned above,
It is more effective to select the surface of the liquid-absorbent sheet facing the food according to the packaging form, and to arrange and absorb at least a portion of the liquid-absorbent sheet at the bottom of the food during transportation or storage, so that the liquid-absorbent sheet is more effective. How to use

In order to package a food using the liquid-absorbent sheet of the present invention, absorb the liquid, and produce a fresh food product, preferably, the side of the liquid-absorbent sheet provided with the identification mark is the food side. Used in packaging. By using in this way, it is possible to easily visually recognize from the outside that the front and back of the liquid absorbing sheet are not used as intended at the time of packaging, and the identification mark after liquid absorption becomes inconspicuous. .
As a specific packaging form for each food, when the food is meat such as beef, chicken and pork, fish, fish meat, etc., the food is brought into contact with the surface of a non-permeable film or a semi-permeable film. Vacuum packaging using a non-breathable film in a state is used, and when the food is fish, fish meat, vegetables, fruits, etc., a packaging in which a liquid-absorbing sheet is placed under the food so that the liquid-permeable films face each other Is used.

The non-breathable film used in the vacuum packaging may be any non-breathable film, such as polyethylene, polypropylene, polyvinyl chloride, etc., or a shrink film generally used for vacuum packaging of foods. In addition, the degree of vacuum at this time may be any value as long as the food is in close contact with the liquid-absorbent sheet of the present invention and the impermeable film.

The identification mark used in the liquid-absorbent sheet of the present invention may be colored on the sheet-shaped liquid-absorbent material or the packaging material itself, and may be inserted with a colored film, tape, thread, etc., affixed with a seal, a mark, etc. The surface may be distinguished by printing on the surface. The easiest way to produce the film is to attach an identification mark to the liquid-impermeable film or semi-liquid film, which is a preferred embodiment. As the design of the identification mark, the entire film may be uniform in color, or may be a stripe pattern or a small polka dot pattern. In particular, from the viewpoint of clarity of identification, it is also possible to select a color tone for each use by including a design of a small pattern such as fish, cow, chicken, pig, vegetable, fruit and the like according to each use. The color of the identification mark is selected to be the same as the color of the drip when the drip is absorbed, or a similar color that makes the identification mark unclear. Specifically, as a combination of food and color, for example, a liquid-absorbent sheet used for beef packaging preferably has a red color, and a liquid-absorbent sheet used for vegetable or fruit packaging has a green, yellow or brown color. Is preferable, and pink, yellow or brown-based colors are preferable for the liquid-absorbent sheet used for packaging of poultry, pork or fish. The identification mark may be provided on either side of the liquid absorbing sheet as long as it can be clearly distinguished between the front and the back, but is preferably provided on a side which is not visible from the outside after packaging.

The dye that can be used for coloring the identification mark is not limited as long as it can be used for food packaging. For example, when the material of the tape or film is a polyolefin, the polyolefin Hygienic
Dyes listed in the Society 's “Positive list on food packaging made of synthetic resins such as polyolefins” can be used. Specific pigments include, for example, foods, red pigments such as food coloring that correspond to food additives, yellow pigments such as β-carotene, green pigments such as chlorophyll, and brown pigments that are a mixture of these pigments. Can be. In addition, for printing on a film or a sticker, a dye obtained by dissolving the above-described dye in a solvent that can be used for food such as water or ethanol can be used.

Examples of fresh foods to which the liquid-absorbent sheet for packaging fresh foods of the present invention can be applied include, for example, partially cut meat such as beef and pork, chicken, and partial meat, and tuna, skipjack, salmon, and the like. Frozen, chilled or fresh products, etc.
Examples thereof include various types in which the drip exhibits a reddish color tone, vegetables, fruits, and the like.

[0031]

(Example 1) As shown in FIG. 1, the entire liquid-impermeable film 2 is made red by using a red color master batch at the time of film production, and is not colored by polyethylene and polypropylene. A nonwoven fabric (liquid-permeable film) 3 was overlaid and heat sealed on three sides to obtain a cover-like packaging material. A pulp (sheet-shaped liquid-absorbing material) 1 carrying a polymer absorbent was sandwiched between the above-mentioned packaging materials, and the entrance was heat-sealed to obtain a liquid-absorbing sheet for a fresh food packaging material.

(Embodiment 2) As shown in FIG.
, A non-colored polyethylene film 5 was used in place of the colored non-permeable film 2 to obtain a cover-like packaging material. The sheet-shaped liquid-absorbing material 1 prepared in the same manner as in Example 1 is put into this, a tape 4 of a red polyethylene film is inserted between the polyethylene film 5 and the sheet-shaped liquid-absorbing material 1, and the entrance is heat-sealed to obtain a fresh food packaging material. Liquid absorbing sheet. When the polyethylene film 5 and the nonwoven fabric 3 were used as a cover-like wrapping material so as to prevent the tape from moving inside, the heat-sealed portion was sandwiched and sealed.

(Embodiment 3) As shown in FIG.
Was replaced with a tape of a red polyethylene film, and crimson was dissolved in ethanol, and this was printed on the liquid-impermeable film 5 using an inkjet printer and dried.

(Embodiment 4) As shown in FIG.
, A red film-like seal 7 was attached in place of the tape of the red polyethylene film. The seal is adhered using starch glue or heat-sealed so that there is no problem in food hygiene.

[0035]

As described above, the liquid absorbing sheet for fresh food packaging material of the present invention uses a harmless coloring agent which can be used as a food packaging on the fresh food side as an identification mark, so that there is a great possibility that the sheet will be mistaken even before packaging. In addition to being reduced, the wrong use product is not only easily identifiable even after packaging, but also the use of the drip-absorbent sheet after absorbing the drip becomes unknown due to the color of the drip or It became unclear, and it became possible for consumers to make a package that does not feel uncomfortable.

[0036]

[Brief description of the drawings]

FIG. 1 is a plan view and a sectional view of a first embodiment of the present invention.

FIG. 2 is a plan view and a sectional view of a second embodiment of the present invention.

FIG. 3 is a plan view and a sectional view of a third embodiment of the present invention.

FIG. 4 is a plan view and a sectional view of a fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Sheet-shaped liquid-absorbing material 2 Red-colored non-permeable film (may be a semi-permeable film) 3 Liquid-permeable film 4 Colored tape 5 Non-colored non-liquid-permeable film (semi-permeable film) 6 Printing on non-colored non-liquid permeable film 7 Colored seal

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B65D 65/02 A23B 4/00 A F-term (Reference) 3E067 AB01 AB02 AB04 AB93 BA12A BA31A BB06A BB14A BB15A BB16A BC04A CA08 CA09 CA24 EE02 EE32 EE33 GB09 GD01 3E086 AA23 AC07 AC22 AD01 AD19 BA15 BA18 BA19 BA29 BA43 BB44 BB51 BB62 CA01 CA22 CA25 CA40 4B021 LA15 LW02 LW04 4B069 AB05 HA01 HA11 KD06 4F100 AH02A01B02 KA06 JD05B JL10A JL10B

Claims (10)

[Claims] 1. A sheet containing a polymer absorbent and / or a wetting agent in a packaging material having one outer surface made of a liquid-permeable film and the other outer surface made of a liquid-impermeable film or a semi-liquid-permeable film. A liquid absorbing sheet for packaging a fresh food containing a liquid absorbent material, wherein at least a part of one side of the liquid absorbing sheet is provided with a color identification mark of the same system as that of the fresh food. Absorbent sheet for fresh food packaging. 2. The liquid absorbing sheet for fresh food packaging according to claim 1, wherein the liquid absorbing sheet for packaging fresh food is red-based. 3. The liquid absorbent sheet for packaging fresh foods according to claim 1, wherein the liquid absorbent sheet is used for packaging vegetables or fruits and has a green, yellow or brown color. Sheet. 4. The fresh food packaging according to claim 1, which is a liquid absorbing sheet for packaging fresh food used for packaging of poultry, pork or fish, and has a pink, yellow or brown color. For liquid absorbing sheet. 5. An identification mark is provided on a side of a liquid-impermeable film or a semi-liquid-permeable film.
A liquid absorbing sheet for packaging fresh food according to any one of claims 4 to 7. 6. The liquid absorbing sheet for packaging fresh food according to claim 1, wherein the identification mark is provided on the liquid permeable film side. 7. The liquid-absorbent sheet for packaging fresh food according to claim 1, wherein the semi-liquid permeable film has a perforation formed in a polyethylene film or a polypropylene film. 8. The sheet-shaped liquid absorbing material may be a wetting agent such as ethylene glycol, propylene glycol, diethylene glycol monoethyl ether, 1,3-butylene glycol, glycerin, polyethylene glycol, polypropylene glycol, polyglycerin, xylitol, sorbitol, and maltitol. The liquid absorbing sheet for packaging fresh food according to any one of claims 1 to 7, comprising at least one member selected from the group consisting of methylcellulose and carboxymethylcellulose. 9. A liquid impermeable material for a liquid absorbing sheet for packaging fresh food according to any one of claims 1, 2, 4, 5, 7, and 8 wherein the fresh food is used. A method for producing a fresh food product, comprising a step of contacting a surface of a water-permeable film or a semi-liquid permeable film, vacuum-packing with a non-permeable film, and absorbing liquid. 10. The fresh food packaging liquid absorbent sheet according to any one of claims 1, 3, 4 and 6 to 8, wherein the fresh food is placed on the liquid-permeable film side. A method for producing a fresh food product, comprising a step of facing, packaging, and absorbing liquid.