JPH0410929A - Packing material for dairy product and the like - Google Patents

Abstract

PURPOSE:To obtain gas barrier properties, fungi and bacteria preventing properties, the drying preventing properties of food and excluded component absorbility-retentivity by using acrylic fiber cloth specified in its basis wt. as a packing material. CONSTITUTION:Acrylic fiber cloth having a basis wt. of 20 - 300g/m<2> is used as a packing material for dairy products. The laminate of this cloth and a film is also pref. used as a packing material. Further, by using packing material consisting of the acrylic fiber cloth and ultrahigh water absorbable fiber cloth, water absorbability can be enhanced. These packing materials are used for packing meat, cheese or raw sea urchin eggs and can keep their freshness for a long time.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field for flj) The present invention relates to a packaging material for packaging fresh foods such as dairy food products and seafood such as fish and raw sea urchin.

(Conventional technology) Various techniques have been proposed to maintain the freshness of fresh foods such as dairy products such as meat, cheese, and butter, and marine foods such as raw sea urchin and protect them from spoilage. It covers a wide range of fields from preservation methods to transportation and packaging.In the field of food packaging, which is the field of the present invention, films (trade name: Saran Wrap, Kurehawo 1, etc.) are the mainstream packaging materials; Alternatively, so-called vacuum bagging is performed, which has various effects such as being transparent so that the contents can be seen, and having elasticity and a beautiful finish.

(Problems to be Solved by the Invention) These films in the above-mentioned technology have the properties required for wood quality4 to protect food from fermentation and spoilage, gas barrier properties, and mold (fungus) and bacterial resistance. It lacks the ability to prevent invasion and proliferation, and the freshness time of food is short, and it has no ability to retain the liquid components that come from the food itself, which is unique to fresh foods, and is reabsorbed into the food, resulting in a significant change in flavor. This is caused by severe damage or lack of gas barrier properties.
It had many problems, such as the food inside it drying out.

The inventors of the present invention have conducted further intensive studies based on the problems of the conventional technology described above, and have arrived at the present invention. In other words, the purpose of the invention is to provide packaging materials that have the gas barrier properties, mold and bacteria prevention properties, prevent food deterioration, and absorb and retain exudate components required for packaging materials for packaging, storing, and transporting foods. Dairy food products such as meat, eggs, cheese, butter and whey, fresh sea urchins, shrimp, crabs, cut and peeled fish and shellfish, fresh seafood such as seaweed, and fresh agricultural products such as vegetables. etc. (hereinafter fI
The purpose of this invention is to provide a packaging material that can be used for packaging, preserving, displaying, transporting, etc., agricultural products, etc., and can maintain freshness.

(Means for determining taste) The above-mentioned nine objects of the present invention are
(a) by a packaging material for dairy products made of delicate acrylic cloth, or by a packaging material according to any one of claims 2 to 84.

The present invention will be explained in detail below.

First, the essential fabric for the present invention must be an acrylic fiber, and acrylic iaim means a fiber formed from a polymer whose main component is acrylonitrile (hereinafter abbreviated as AN). It may be a copolymer obtained by copolymerizing other copolymerizable compounds.Although there is no particular limitation on the ratio of the AN component, one having a weight of 80 to 100 is preferably used.

Conventional methods can be used to form cloth from the fibers, such as ordinary woven cloth,
In addition to silk fabric, non-woven fabrics produced by, for example, needle punching, heat fusion, and wet processes are also available.

The cloth thus formed has a date of 20 to 800 fr/rr.
It is essential that it is l. Cloths with a basis weight of less than 20y1-- are difficult to handle in packaging, and lack the gas barrier properties and antibacterial properties described below, so that the present invention cannot be achieved.

When the date exceeds 800 tir/rn', it is not preferable because it not only becomes difficult to form the cloth itself and handle the packaging, but also loses the good finish of the packaging and the cost advantage of packaging materials. In view of the advantages in handling and cost, a basis weight of 80 to 200 fr/g is recommended as a more preferred embodiment. It should be noted that there is no problem in mixing acrylic fibers with fibers other than acrylic fibers, such as heat-fusible fibers that can be used as binders, or fibers added for the purpose of increasing the amount, in accordance with the conventional fabric forming method. . Examples of these fibers include synthetic fibers, semi-synthetic fibers, and natural fibers such as polyethylene, polypropylene, nylon, ester, polyvinyl alcohol, rayon, cotton, and hemp.

Although the fabric of the present invention can be used as it is as a packaging material for dairy products, etc., a laminate of the fabric and a film is also more preferably used as a packaging material. Commercially available films are advantageously used for such laminates, and materials include polyethylene,
Polypropylene, nylon, ester, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, etc. are recommended. Although conventional methods can be used for lamination, for example, a hot roll method, a hot pin method, etc. are preferably employed. In the case of a laminate with such a film, it is preferable to provide thin holes in the film, or in the hot pinning method, when the lamination and the formation of the holes can be done in one step, the surface of the film where no fabric is present can be used for dairy products, etc. It is used in contact with food, and it is easy to close without fibers sticking to the food.Through the thin holes in the film that were in contact with the food, exuded components from the food contained in the film flow out, causing the film to leak. The upper fabric layer absorbs and retains the food, preventing deterioration of flavor and overdrying of the food. Although the above explanation is an example of layering a film on one side of the cloth, it does not exclude laminating the film on both sides of the cloth.

In the case of such a product having one layer of film on both sides, it is preferable that one thin hole provided in the film exists only on one side depending on the purpose of use. The film on the non-food contact side is
The nonwoven fabric in the middle layer adsorbs and retains exudate components from food, which increases the retention efficiency, and also prevents odors from spreading to the surrounding area, making it sanitary.

Furthermore, the present invention also includes a packaging material made of acrylic fiber cloth and superabsorbent fiber cloth with a basis weight of 20 to 8009 T/W/. Here, super absorbent fibers refer to fibers with high water absorption properties, and their water absorption capacity is 2 to 800. Examples of commercially available fibers include Lanseal (manufactured by Nippon Exlan Kogyo 2) and Highly Absorbent Shimilon (manufactured by Fi Kasei Kogyo 2).

Such a superabsorbent fiber cloth can be formed into a cloth in the same manner as the acrylic fiber cloth of the present invention by employing the conventional method described above. The packaging material made of acrylic fiber cloth and superabsorbent fiber cloth may be made by laminating and fixing the canvases, or by making one cloth into a shape of a crimp with the other, or by embedding it. It is also suitably carried out to mix (blend) acrylic fibers and superabsorbent fibers and then form a cloth into a packaging material. mixture(
The mixing ratio of super-absorbent fibers to acrylic fibers when using a blend cannot be determined unconditionally since it depends on the water absorption capacity of the super-absorbent fibers, but it is generally 1 to 50% by weight (based on acrylic fibers).

The packaging material thus obtained is highly effective in preserving meat, eggs, cheese, dairy food products such as putter whey, and raw sea urchin. It is extremely effective as a wrapping material for fish, meat, cheese, raw sea urchin, and fillets of type R fish.

ai! according to the present invention obtained in this way! Packaging materials for 1iIk products are the #I packaging materials needed for packaging, preserving, and shipping fresh foods. Due to its excellent performance, it is widely used in the field of application.

(Function) The R111 packaging material for agricultural products according to the present invention exhibits excellent performance in this field, although it has not yet been fully developed, but it is thought to be generally as follows.

In other words, acrylic FK & materials are thought to be able to use many of their nitrile groups as electronic components, but they also have the inhibitory effect of inhibiting the infiltration and proliferation of mold (fungi) and mold, thereby preventing these. Protecting the package contents from spoilage due to sources.

The adoption of the cloth form means that the fine pores formed by numerous fibers contribute to preventing the invasion of microorganisms, and at the same time, exuded components from the food contents are adsorbed and retained in these fine pores, improving the flavor of the food. Prevent decline. Furthermore, cloth made of a large number of fibers has a combination of the irregular arrangement of the fibers and the large total surface area of the fibers, which makes it difficult for the outside atmosphere, mainly the air, and the food content to diffuse into it and then come into contact with it. The large resistance may also be a reason for the high performance. This effect is further enhanced in the packaging material of the present invention which is a laminate with a film.

The packaging material of the present invention, which is made of super-absorbent fiber cloth, exhibits the effect of actively absorbing and fixing components exuded from the food contents, and significantly prevents deterioration of flavor. Although fresh foods are generally stored and transported in refrigerators (cars), if the above-mentioned superabsorbent fiber cloth is used as a packaging material after absorbing water and then freezing it,
Even though it is refrigerated, the food remains extremely fresh. This is because the bound water in the superabsorbent fibers has a lower degree of freedom than normal free water and melts extremely slowly, and the frozen layer has a high Ganubarium effect.

When using the above-mentioned super absorbent fibers after absorbing water in advance, adding alcohol, vinegar, etc. that has sterilizing power to the water will suppress the entry and propagation of bacteria, etc., making it even more effective. . In addition, in order to prevent cell destruction and/or quality changes in dairy products, etc., the storage temperature should be kept at 0.8
If the water is not lowered to below C, adding ingredients such as gelatin or agar to the water to solidify the water absorbed by the superabsorbent fibers at a high temperature, for example, at a temperature of 0.6 or higher, will improve the quality of dairy products, etc. Because the packaging material sealed with the fiber cloth can solidify at temperatures above 0°C, destruction of cells in dairy products, etc., despite storage at temperatures above 0°C.
Alternatively, it also exhibits the effect of being able to be preserved by suppressing the invasion and proliferation of bacteria, etc., without any change in quality.

(Examples) The present invention will be described in more detail with reference to Examples below, but the scope of the present invention is not limited in any way by the description of these Examples.

Reference example: Acrylic fiber manufactured by Japan Exlan Kogyo ■ (8dX51jl
EI, l and the company's super absorbent fiber (Funseal 5d x 61m)
+1) and a commercially available polyethylene film were prepared. Acrylic fiber alone and acrylic fiber M/super absorbent fiber-70
A nonwoven fabric with a basis weight of 100 fr/d was obtained by applying a tabletop card S at a ratio of /80 (weight ratio) and then using a tabletop needle punch machine in a conventional manner. A sample nonwoven fabric (A) is made of acrylic fibers alone, and a sample nonwoven fabric (B) is a sample nonwoven fabric made of a mixture of acrylic fibers #/ff water absorption am.

A and a polyethylene film were laminated and fed to a press roller, and fixed to a heat pin installed immediately after the exit of the press roller. At the same time, a sample non-woven fabric (C) was obtained in which thin holes were formed on the film surface.

Examples.

Immediately after slaughtering, beef chunks (fin parts) lKQ were each wrapped in sample nonwoven fabrics A to C of the reference example and a commercially available food packaging film (trade name Saranhupp), and packaged beef chunks a, b,
c and d were obtained. At the same time, this was placed in a refrigerator maintained at 0°C, and after 40 days, it was taken out and opened, and the external appearance of the beef was visually observed, and Bacillus 5, a typical bacterium at the time of spoilage, was detected.
The number of bacteria of S. ubtilis per liter of sample meat was measured, and the meat was cooked into grilled meat and a taste sensory test was conducted by five tasters.

The results are shown in Table 1.

Table 1 As shown in Table 1, it is understood that when the packaging material of the present invention is used, it has extremely superior freshness retention and antibacterial action compared to conventional food packaging films. .

This was combined with reference example non-woven fabric A and commercially available food packaging film (
They were each wrapped in the product name Kurehafufun and placed in a refrigerator maintained at 5°C at the same time. The cheese was opened every day, the surface of the cheese was visually observed, and the cheese was repackaged and returned to the refrigerator. When we repeated this process and examined the number of days until mold appeared, we found that the cheese made with nonwoven fabric A did not show any blue mold growth even after 8 weeks, whereas the cheese made with commercially available film did not develop blue mold after 4 days. admitted. In addition, when I tried the cheese made of nonwoven fabric A after 8 weeks, there was no change in taste or flavor. It can be seen that the packaging material of the present invention is extremely excellent in preserving dairy products.

Tear the sea urchins to pieces, put the same amount into two food trays, cover each with a commercially available cellulose yarn M fiber sheet using the packaging material of non-woven fabric C as a reference example, and place it in a 10C display case. Observations were made in the same manner as in Example 2. When judged before making a sushi plate, the nonwoven CO raw sea urchin could be used as sushi starter even after one week, whereas the commercially available sheet sea urchin could only be used as sushi starter until the second day.

Example 4 The sea bream from a live fish tank was cut into 8 pieces. The two pieces of sea bream obtained were each wrapped in nonwoven fabric B of the reference example and a commercially available cellulose fiber sheet and placed in an ice-cold freezer. In addition, the non-woven fabric B had its superabsorbent fibers absorbing water before use. After one day had passed, I took it out of the freezer, opened it immediately, and looked at the feel of the inside piece of the tie.The meat piece made of non-woven fabric B had sufficient repulsion when pressed, but the meat piece made from the commercially available sheet had no repulsion elasticity at all. I couldn't feel it. After returning both pieces of meat to room temperature, they were cooked into sashimi and tested for taste. The sashimi made from nonwoven fabric B had sufficient texture, but the sashimi made from the commercially available sheet was extremely soft and had poor elasticity. It is understood that the action of the frozen water absorbed by the packaging material of the present invention prevents the contents from overcooling or overdrying.

(Effects of the Invention (1) The packaging material for dairy products, etc. of the present invention is a packaging material made of acrylic fiber cloth, a laminate of the cloth and a film, and a packaging material made of the cloth and superabsorbent fiber cloth, and is chemically stable and easy to handle. It goes without saying that it is easy to use; 1) it has gas barrier properties and anti-drying functions that are important for food packaging; and the ability to absorb and retain components exuded from foods; , has a high level of bactericidal properties that do not allow the inhabitation and proliferation of bacteria, and is therefore used for the packaging of fresh foods, preservation, storage,
A notable effect of the present invention is that it provides great convenience in display, transportation, etc.

2) The highly antibacterial effect of the acrylic fibers and acrylic fibers, which are packaging materials for dairy products, etc. of the present invention, which do not allow the inhabitation and proliferation of mold and bacteria, can be utilized as follows.

(2) Laying the member made of the acrylic fiber cloth of the present invention inside the shoe has the effect of suppressing so-called athlete's foot and other fungi.

(2) Laying a member made of the acrylic fiber cloth of the present invention inside a chest of drawers or the like has the effect of suppressing the inhabitation and proliferation of mold, paper fish, clothing-eating insects, and the like.

The above-mentioned effects can be achieved even with acrylic fibers, but in particular fibers made of copolymers with halogens, such as vinyl nitrate containing chlorine, have a greater synergistic effect in combination with the bactericidal properties of halogens. This is also an effect of the present invention.

1. Indication of the case 1990 Patent Application No. 114430 3. Person making the amendment Relationship with the case Patent applicant 6. Contents of the amendment (1) As shown in the attached sheet, the address of the inventor in the application is "Chikushino City, Fukuoka Prefecture". Corrected to Futsukaichi 677-5°.

(2) As shown in the attached document, the patent applicant in the application (representative applicant)
should be corrected to "patent applicant."

(3) As shown in the attached sheet, the address of the inventor or patent applicant other than the above in the application should be “677-5J Futsukaichi, Chikushino City, Fukuoka Prefecture.”
Correct.

(4) The scope of claims in the specification is corrected as shown in the attached sheet.

Above 4. Date of amendment order. 5. Subject of amendment. (1) Inventor's address column in document II. (2) Patent applicant (representative applicant) column in application. (3) Inventions other than the above in application. Column for the address of the person or patent applicant (4)
By column of claims in the specification: Paper Claim 1: A packaging material for agricultural products made of acrylic fiber cloth with a basis weight of 20 to 300 gr/m.

2. A packaging material for dairy products, etc., comprising a laminate of the cloth and film according to claim 1.

3. A packaging material for dairy products, etc., comprising the cloth according to claim 1 and a superabsorbent fiber cloth.

4. The packaging material according to claim 1, wherein the dairy product is meat, cheese, fish, or sea urchin.

Claims (1)

[Claims] 1. A packaging material for dairy products made of acrylic fiber cloth with a basis weight of 20 to 300 gr/m^2. 2. A packaging material for dairy products made of a laminate of the cloth and film according to claim 1. 3. A packaging material for dairy products, etc., comprising the cloth according to claim 1 and a super absorbent fiber cloth; 4. The packaging material according to claim 1, wherein the dairy product, etc. is meat, cheese, fish, or raw sea urchin.