JPS63203575A - Base material for drip absorption of fishes and shellfishes and meats - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a trip-absorbing base material for seafood and meat, and more specifically, it is arranged at the bottom or around the container containing seafood and meat, and This invention relates to a trip-absorbing base material that absorbs liquid substances that are eluted and leached from meat.

[Conventional technology and its problems]

Conventionally, seafood and meat are sold at supermarkets or retail stores by placing sponge, nonwoven fabric, paper, etc. on the bottom or around the lightweight resin molding, and placing the above-mentioned foods on top.

In addition, in some cases, seafood and meat are immersed in cold salt water before being put into lightweight resin moldings to prevent elution from these foods and the formation of leachables, oxygen absorbers, and carbon dioxide generators. It has been proposed to maintain freshness by using (
JP-A-58-138336, JP-A-58-17543
(See Publication No. 1).

In addition, proposals have been made for laminated molded products in which superabsorbent resin powder is sandwiched between sheets of paper, and methods in which these are combined with oxygen absorbers and carbon dioxide gas generators to maintain freshness. (Refer to Japanese Unexamined Patent Publication No. 107134/1983).

However, despite such treatment, elution and leachable substances derived from seafood and meat, such as blood and body fluids, ooze out due to the thermal insulation treatment during thawing and the passage of time after thawing.
The non-woven fabric, paper, etc. at the bottom cannot absorb the liquid completely, which impairs the beauty of the product, as well as causing deterioration in taste and spoilage.

In addition, when a laminated base material such as one in which a superabsorbent resin is sandwiched between two pieces of paper absorbs leached matter derived from seafood or meat, such as blood or body fluids, the blood sticks to the surface. In addition to being unsightly in appearance, there are also drawbacks such as the elution of the adhesive that maintains the laminated base material and poor swelling of the superabsorbent resin due to the use of adhesive. It was becoming a big problem.

[Means for solving problems]

In view of this situation, the inventors of the present invention have developed a system that instantly absorbs a large amount of eluate and leachate derived from seafood and meat, that is, blood and body fluids, and once absorbed, the eluate does not ooze out, and no adhesive is used. As a result of intensive research and development, we have developed a base material that is safe under the Food Sanitation Act and does not leave blood stains on the surface even after absorbing blood, and does not look unsightly. The sheet-like base material, which is made by interposing a liquid-absorbing polymer compound between fibers, has excellent trip absorption and does not return liquid even after absorption and swelling. The present invention has been completed based on the discovery that when the surface is used, stains such as blood are less likely to remain on the surface and the appearance is not unsightly.

That is, the present invention provides a seafood product in which a liquid-absorbing polymer compound is interposed between a hydrophobic fiber sheet and a hydrophilic fiber sheet, or a hydrophilic fiber sheet containing heat-meltable hydrophobic fibers as a part thereof.・Provides a trip-absorbing base material for meat.

The fibrous sheet used in the present invention is preferably a nonwoven fabric made from various fibrous webs.

The hydrophobic fiber sheet of the present invention may be any material as long as it exhibits substantially hydrophobicity, and hydrophobic fibers used for producing the sheet include polyester, acrylic, nylon,
Examples include polyethylene, polypropylene, polyvinyl chloride, and blended fibers thereof. In addition to the above-mentioned hydrophobic fibers, hydrophilic fibers such as rayon may also be made hydrophobic on the surface with a rosin-based or alkyl ketene dimer-based sizing agent, a cationic surfactant, or the like.

The hydrophilic fiber sheet of the present invention only needs to be substantially hydrophilic, and examples of the hydrophilic fiber used for producing the sheet include wood pulp, cotton, wool, rayon, acetate, vinylon, etc. However, in order to improve the heat-sealability with the hydrophobic 'Ia fiber sheet, heat-melting hydrophobic fibers can be included in a part of the fiber sheet, and in this way, the base material of the present invention can be manufactured. This is preferable because a heat sealing method can be employed.

Examples of heat-meltable hydrophobic fibers include polyester, acrylic, nylon, polyethylene, polypropylene, polyvinyl chloride, etc., and their blending into the hydrophilic fiber sheet is within a range that allows the sheet to substantially maintain hydrophilicity. It can be carried out in an amount of 1 to 70% by weight, preferably 5 to 30% by weight.
%.

The liquid-absorbing polymer compound used in the present invention may be any compound as long as it has high water-absorbing performance, such as carboxylic acid or/and a salt thereof, phosphoric acid or/and a salt thereof, as a functional group, Water-soluble ethylenically unsaturated monomers having groups derived from sulfonic acid or/and its salts, homopolymers or copolymers of ethylene oxide, propylene oxide, carboxyalkylcellulose, etc.
Alternatively, examples include graft polymers of the above monomers onto polysaccharides such as starch and cellulose. Preferred monomers include (meth)acrylic acid or its salts, vinylsulfonic acid or its salts, vinylphosphonic acid or its salts, and more preferred monomers include (meth)acrylic acid or its salts. Can be done.

Furthermore, for the purpose of improving absorption performance, it is also possible to add a crosslinking agent or an additive to the above monomer.

Examples of crosslinking agents include water-soluble polyfunctional ethylenically unsaturated monomers such as methylene bisacrylamide, ethylene glycol di(meth)acrylate, and polyethylene glycol di(meth)acrylate, as well as ethylene glycol diglycidyl ether and polyethylene glycol diglycidyl. Water-soluble compounds having two or more functional groups that can react with functional groups such as carboxylic acid, phosphoric acid, and sulfonic acid, such as polyglycidyl ethers such as ethers, polyols such as glycerin and pentaerythritol, and polyamines such as ethylenediamine. etc. can be suitably used.

Examples of additives include finely ground fillers such as talc, clay, and diatoms.

The trip-absorbing base material of the present invention comprises two types of powdered solid substances of liquid-absorbing polymer compounds obtained by polymerizing monomers as exemplified above or monomers and cross-linking agents etc. in a conventional manner. However, in order to prevent the gelled polymer from leaking onto the surface of the fiber sheets after water absorption and swelling, an aqueous monomer solution is applied to the two fiber sheets in advance. It is preferable to use a sheet obtained by adhering it to any one of the following and then polymerizing it.

There are no particular limitations on the method of applying the aqueous solution of 7-summer to the fiber sheet, but the method and amount of adhesion that provides a form in which at least a portion of the liquid-absorbing polymer compound exists discontinuously in a form that envelops the fiber web It would be better if For example, known printing methods such as screen printing and gravure printing, or spraying or spraying using a spray can be used. It is also possible to use polymerizable inert viscosity modifiers and foaming agents to increase the efficiency of deposition. Further, pattern printing suitable for use of the absorbent base material may be applied. The aqueous monomer solution thus deposited on the fiber sheet is polymerized by known means and converted into a liquid-absorbing polymer compound. Then, another fibrous sheet is placed on top of the surface on which the liquid-absorbing polymer compound is present, and the fibrous sheets are adhered to each other to form a trip-absorbing base material. As a polymerization method, for example, a method using heat, light, accelerated electron beam, radiation, ultraviolet light, etc. can be used. If necessary, it is preferable to conduct the polymerization under an inert atmosphere, for example under a nitrogen stream, in order to smoothly proceed with the polymerization. After polymerization, the water-containing absorbent substrate may be dried using hot air, microwaves, infrared rays, or the like.

In the present invention, the content of the liquid-absorbing polymer compound is preferably 10 to 90% by weight, more preferably 15 to 80% by weight, based on the solid weight of the absorbent substrate.

To bond a hydrophobic fiber sheet and a hydrophilic fiber sheet, when using a powdered polymer compound, place the powder evenly on one fiber sheet, and then apply a small amount of water by spraying or other method. An example of this method is to spray the fibrous sheet, use the adhesive force of the swollen polymer, place the other fiber sheet on top, and dry while applying pressure. In addition, when polymerizing after attaching the monomer to a fiber sheet in advance, when the polymer compound still has moisture after polymerization, place the other fiber sheet on top and dry it while applying pressure. Methods that can be used in any case include methods such as bonding by heat sealing.

When the trip absorbing base material made in this way is made with the hydrophobic fiber sheet side as the adhesive surface with food, for example, it can be placed on the bottom of a food packaging tray with the hydrophobic fiber sheet side facing up, and then When seafood, meat, etc. are placed on the holder, the trip liquid passes through the hydrophobic fiber sheet and is absorbed and diffused in the polymer absorbent layer and further in the hydrophilic fiber layer.

Therefore, the trip fluid will not seep out to the surface again.
In addition, since the hydrophobic fiber layer does not absorb and diffuse, the surface is not stained with blood or other color, and the food as a whole remains beautiful, resulting in a significant increase in commercial value.

〔Example〕

Next, an example of manufacturing the trip absorbing base material of the present invention, a comparative manufacturing example,
The present invention will be explained in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

Production Example 1 A 70 mol% neutralized aqueous sodium acrylate solution with a solid content of 40% by weight was prepared. Add 1% by weight of sodium persulfate (based on sodium acrylate monomer) and 500p of sodium persulfate to this solution.
pm of methylene bisacrylamide (vs. sodium acrylate monomer) was dissolved, and then nitrogen gas was blown into the solution to remove dissolved oxygen.The above solution was made from only polyethylene-polypropylene composite fibers (ES fibers) with a basis weight of 35 g/a+". a hydrophobic fiber web (A) consisting of equal weights of 50 parts by weight of polyethylene-polypropylene composite fibers (ES fibers) and 50 parts by weight of polyethylene terephthalate (PET); Fiber) 35N parts and acrylic 65 parts
Each of the fibrous webs (C) consisting of weight parts
．． 5c- was left and was sprayed uniformly at 150 g/s'' (polymer coating amount: 60 g/m'').

The web coated with this monomer was left in an oven completely purged with nitrogen at 120° C. and 40% relative humidity for 5 minutes to polymerize. Thereafter, this composite was dried under reduced pressure at 100°C, and 70 parts by weight of wood valve and 30 parts by weight of polypropylene were added. i
Place a hydrophilic fiber sheet (basis weight 35 g/m") consisting of 100% of
Seal with trip absorbing base material (A), (8)
, (C) was obtained.

Production Example 2 Highly absorbent cross-linked polyacrylate (D), saponified starch-polyacrylonitrile graft polymer (E), cross-linked polyethylene to polyethylene-polypropylene composite fiber (ES fiber) with a basis weight of 35 g/m'' Oxide (F
) was evenly sprinkled on each powder, leaving a circumference of 0.5 cm+, so that each powder weighed 60 g, and on top of that, a hydrophilic fiber sheet (35 g/mz) consisting of 70 parts by weight of rayon and 30 parts by weight of polyethylene terephthalate. , and seal around 0.5C at 200℃ with a heat sealer, trip absorbing base material (D), (E),
(F) was obtained.

Comparative Production Example 1 Highly absorbent cross-linked polyacrylate (G), saponified starch-polyacrylonitrile graft polymer (H), cross-linked polyethylene oxide on hydrophilic and highly breathable paper (basis weight 35 g/m") Sprinkle 60g of powder (I) evenly on each 1-!, place the same paper on top of it, sandwich it like a sandwich, add vinyl acetate resin partially between them to adhere, and then Place a density polypropylene film and heat under pressure (film thickness 0.0
3mm) Adhesive single-sided water absorbent sheet (G), (H
).

(1) was created.

Example 1 Invention product shown in Invention Production Example 1 (^), (B)
, (C) (D), (E), (F) (The size of each sheet is 30 cm + m x 50 cm +) and the comparative product CG shown in Comparative Manufacturing Example 1) A sample (size: 3Qces x 50cm+) was immersed in tap water for 10 minutes, then drained with an 80-mesh wire mesh, and the water absorption capacity and water absorption rate were calculated according to the following formula. The results are shown in Table 1.

Time taken to absorb 300 ml of physiological saline (seconds) Table 1 From the results shown in Table 1, the water absorption capacity and absorption rate of the comparative product were suppressed compared to the product of the present invention due to the adhesive used.

In addition, those using adhesives had a strange odor and were unsuitable for use as trip-absorbing substrates for seafood, meat, and the like.

Example 2 Styrofoam container (8cm x 23cm x 2)
cm) of the invention products (A), (B), (D)
, (E), comparative products (G), (H).

In addition, a sheet of paper towel, each measuring 7 car x 16 cm, was placed on the bottom, and a frozen mackerel cut in two in the middle was placed on top of this and thawed at 10°C. The amount of absorption of the sheet after thawing and the weight of the liquid that could not be absorbed and had accumulated at the bottom of the Styrofoam container were measured. The aesthetic appearance was also visually judged. The results are shown in Table 2.

Table 2 0: Good with no particular problems ×: Unsightly with noticeable blood color on the sheet surface Example 3 Styrofoam container (8car x 23cs
2c+w) with the products of the present invention (A), (C), (D
), Comparative products (G), (H), In addition, a paper towel (both 7 c + w x 16 cm) was placed on the bottom, 300 g of beef liver was placed on top of this, and after sealing, 10
The sample was left at ℃ for one day, and the superiority of the present invention was evaluated in the same manner as in Example 2. The results are shown in Table 3.

Table 3 0: Good with no particular problems

Claims (1)

[Claims] 1. A trip-absorbing base material for seafood and meat, comprising a hydrophobic fiber sheet and a hydrophilic fiber sheet with a liquid-absorbing polymer compound interposed between them. 2. The substrate for absorbing trips from seafood and meat according to claim 1, wherein the hydrophilic fiber sheet partially contains heat-meltable hydrophobic fibers.