JPH10313775A - Water absorptive article and using method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water absorptive article and a using method thereof with which only drips leaked from food are absorbed, food is prevented for a long time from being discolored or lowering quality and yield can be maintained. SOLUTION: In a multilayer article which is formed by adhesively sealing peripheral edge parts while being composed of both outer layers composed of liquid permeable sheets 9 and a partition layer inserted between both the outer layers and composed of a liquid non-permeable sheet 10, a sheet (c) composed of paper or pulp is held between the partition layer and one of both the outer layers, and a sheet (d) composed of paper or pulp containing water absorber grains is held between the partition wall and the other outer layer. In the using method for such a water absorptive article, the surface of water absorptive article holding the sheet (c) composed of paper or pulp is contacted with food, packed in vacuum and preserved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-absorbing article for absorbing and retaining moisture, and relates to a field of preserving fresh food such as fish and meat, a field of sanitary materials such as disposable diapers and sanitary articles, and a method of removing moisture in soil. It is advantageously used in the field of agricultural civil engineering that absorbs and holds.

[0002]

2. Description of the Related Art Meat called drip exudes when food such as meat or fish is vacuum-packaged with a non-breathable film and stored in a chilled temperature range, or when thawed after being frozen and stored. This drip accumulates between these foods and the non-breathable film, lowering the quality, such as discoloring the food that has been in contact with it for a long time, impairing the value of the product, and removing the discolored parts reduces the yield accordingly. There is a problem. Furthermore, the drip also serves as a hotbed for the propagation of bacteria, thus shortening the shelf life of the food. In recent years, as a method of removing drip, a method of contacting and storing a sheet-shaped water-absorbing article with food has been proposed (for example, JP-A-3-147739, JP-A-7-257).
657, etc.).

[0003]

However, among the above methods, the former method has a liquid impervious film on the surface that comes into contact with the food, so that the drip generated on the contact surface, particularly on the uneven portion of the food, is reduced. There is a problem that it is difficult to absorb the drip and the removal and removal of the drip is insufficient. On the other hand, in the latter method, since the surface that comes into contact with the food is formed of a semi-permeable film, the food may be dried by absorbing moisture in the food from the contact surface during storage, and the quality may be degraded. there were.
The present invention has been made in order to solve the above problems, and absorbs only drip exuded when absorbing drip exuding from food such as meat or fish, and does not actively absorb moisture from food. By not drying the food itself by that, also absorbs and removes the drip that oozes out and accumulates in the bottom of the food, the recess, etc., where the food and the water-absorbent article are in contact,
It is an object of the present invention to provide a water-absorbent article that can prevent discoloration and quality deterioration of food for a long period of time and maintain a yield, and a method for storing food using the same.

[0004]

Means for Solving the Problems The present inventors have found that the above object can be achieved by controlling the amount of water absorption from a contact surface with food, and have completed the present invention.
That is, the present invention provides both outer layers made of a liquid-permeable sheet,
A multi-layer article comprising a partition layer made of a liquid-impermeable sheet inserted between both outer layers, and having a peripheral edge bonded and sealed,
Disclosed is a water-absorbent article characterized in that a sheet made of paper or pulp is sandwiched between one of a partition layer and both outer layers, and a sheet made of paper or pulp containing water-absorbing agent particles is sandwiched between the other. . It is another object of the present invention to provide a method of using a water-absorbent article in which a surface of a water-absorbent article holding a sheet made of paper or pulp is brought into contact with food and then vacuum-packaged to absorb drip oozing from the food.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Examples of the liquid-permeable sheet used in the present invention include paper, nonwoven fabric and perforated film. Examples of the liquid-impermeable sheet include synthetic resin sheets such as polyethylene and polypropylene, waterproofed paper, and aluminum foil.

The water-absorbent article of the present invention is a multilayer article having a liquid-permeable sheet as an outer layer and a non-water-permeable sheet as a partition layer, and its peripheral portion is bonded by a method such as heat bonding. An article is formed by sandwiching a sheet made of paper or pulp on one side between the partition layer and both outer layers, and a sheet made of paper or pulp containing water-absorbing agent particles on the other side.

The water-absorbing agent particles used in the present invention generally include
Any granular material used in the field of disposable diapers, sanitary products, agricultural civil engineering, and the like may be used. These are generally three-dimensionally cross-linked water-soluble polymers,
Many types are known. As a specific example of the water absorbing agent,
Acrylic acid, methacrylic acid, acrylate, methacrylate, acrylate, methacrylate, acrylamide, methacrylamide, acrylonitrile, methacrylonitrile, maleic acid, sulfonated styrene, polysaccharides such as starch and cellulose , Polyvinyl pyridine or a crosslinked product of a polymer obtained by graft-polymerizing one or more of the group consisting of oligomers or co-oligomers, or by subjecting the polymer to graft polymerization and hydrolysis, 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 / acrylic Salt copolymer, isobutylene / maleic anhydride copolymer, polyvinyl alcohol / maleic acid copolymer, and carboxymethylcellulose cross-linked product. Among these, a crosslinked product of sodium polyacrylate is preferred.

As a method for incorporating the water-absorbing agent particles into paper or pulp, a method in which the water-absorbing agent particles are sandwiched between two pulp sheets and pressed, a method in which dried pulverized pulp fibers and absorbent particles are mixed and rolled And a method of mixing a water-absorbing agent particle with a wet paper-made pulp fiber web, and rolling and drying the mixture.

In the method of using the dewaterable article of the present invention, the surface of the article sandwiching a sheet made of paper or pulp is brought into contact with food, then vacuum-packaged and stored, and drip exuded from the food is absorbed. Things.

FIG. 1 shows an example of the water absorbent article of the present invention. In FIG. 1, a partition layer made of a liquid-impermeable sheet b is inserted between outer layers made of two liquid-permeable sheets a, and the periphery is sealed. A sheet made of paper or pulp is sandwiched in one space separated by a and b, and a sheet made of paper or pulp containing water-absorbing agent particles is sandwiched in the other space. As a method of use, as shown in the figure, the c side is brought into contact with food to vacuum package.

[0011]

The present invention will be described below in more detail with reference to examples. Example 1 Between two wet nonwoven fabrics (HOP-30H, manufactured by Hirose Paper Co., Ltd.) cut to 15 cm × 15 cm, 15 cm × 15 c
The low-density polyethylene film cut into pieces m was sandwiched, and three sides of the peripheral edge thereof were heat-bonded to prepare a bag whose inside was partitioned by low-density polyethylene. Inside one bag (hereinafter "a side")
), Insert one sheet of commercially available tissue paper cut to 10 cm x 10 cm into the other bag (hereinafter referred to as "b
Side) is inserted with 1 g of water-absorbing agent particles (Aqualic CAW4, manufactured by Nippon Shokubai Kagaku Kogyo Co., Ltd.) between two sheets of the above tissue paper. afterwards,
The opening was sealed by heat bonding to produce a water absorbent article.
The a side of the obtained water-absorbent article was replaced with Australian beef thigh meat (about 3k
After contacting with the bottom of g) and performing vacuum packaging, it was left still in a refrigerator at 2 ° C. for 3 weeks. After three weeks, unpack the vacuum packaging
The weight increase of the a-side and b-side inserts of the water absorbent article was measured. Furthermore, the color tone of the meat surface and the article contact surface was observed.
Table 1 shows the above results.

COMPARATIVE EXAMPLE 1 A wet nonwoven fabric and a low-density polyethylene film cut into a size of 15 cm × 15 cm were overlapped, and three peripheral edges thereof were heat-bonded to prepare a bag. A commercially available tissue paper cut to 10 cm x 10 cm and 1 g of the above-mentioned water absorbing agent particles sandwiched between two pieces of tissue paper are inserted into the bag. After that, the opening is sealed by thermal bonding,
A water absorbent article was produced. The polyethylene film side of the obtained water-absorbent article was brought into contact, and the same evaluation as in the example was performed. Table 1 shows the results.

Comparative Example 2 An experiment was performed in the same manner as in Comparative Example 1 except that a wet nonwoven fabric was used instead of the low-density polyethylene. Table 1 shows the results.

[0014]

[Table 1]

[0015]

As described above, the dehydrated article of the present invention absorbs only the drip exuded from food such as meat or fish and absorbs only the exuded drip, and does not actively absorb moisture from the food. Without drying, and also absorbs and removes drip that oozes out and accumulates at the bottom of food, in which the food and the water-absorbent article are in contact, recesses, etc., to prevent discoloration and deterioration of food over a long period of time, and This is useful because the yield can be maintained.

[Brief description of the drawings]

FIG. 1 shows an example of a water absorbent article of the present invention.

[Explanation of symbols]

a liquid-permeable sheet b liquid-impermeable sheet c sheet made of paper or pulp d sheet made of paper or pulp containing water-absorbing agent particles

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B32B 27/00 A41B 13/02 D B65D 81/26 A61F 13/18 307E D21H 17/37 D21H 3/38 101

Claims (3)

[Claims] 1. A multilayer article comprising two outer layers made of a liquid-permeable sheet, and a partition layer made of a liquid-impermeable sheet inserted between the two outer layers, wherein the peripheral part is adhesively sealed. A water-absorbent article characterized in that a sheet made of paper or pulp is sandwiched between one layer and both outer layers, and a sheet made of paper or pulp containing water-absorbing agent particles is sandwiched between the other. 2. The water-absorbent article according to claim 1, wherein the liquid-permeable sheet is one selected from the group consisting of paper, nonwoven fabric and perforated film. 3. The water-absorbent article according to claim 1, wherein the surface of the paper or pulp sheet sandwiched between the paper and the pulp is brought into contact with food, and then vacuum-packaged to absorb drip exuded from the food. How to use sexual articles.