JPS63119666A - Food preserving tool - Google Patents

Abstract

PURPOSE:To obtain a food preserving tool of sustained release ethanol having safety and high performance, by packing a powder ethanol composition into a specific ethanol sustained release film. CONSTITUTION:A mixture of 20-70pts.wt. ethanol and 80-30pts.wt. sugaralcohol such as sorbitol, mannitol, etc., heated at 50-100 deg.C, melted and cooled to give a powder ethanol composition. Then the composition is packed into a container which is partially or totally made of a laminate film obtained by laminating a film having >=50g/m<2>/24hr/50RH/40 deg.C ethanol permeability, such as ethylene-methyl acrylate copolymer containing 15-25wt% methyl acrylate component, porous polyethylene or microporous propylene to an air- permeable substrate.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a novel food preservation device, specifically, a novel sustained-release ethanol composition produced by a combination of a specific powdered ethanol composition and a specific ethanol sustained-release film. Concerning ethanol food preservation equipment.

[Conventional technology]

Food preservation tools that utilize ethanol vapor have been known for a long time, and the following prior art techniques exist.

(2) As shown in Japanese Patent Publication No. 55-2273, ethanol is adsorbed on an adsorbent such as silica or dextrin and placed in various ethanol-permeable containers.

(2) As shown in JP-A-56-30903, ethanol is gelled with a condensation reaction product of D-sorbit and benzaldehyde and placed in various ethanol-permeable containers.

(2) Ethanol gelled with potassium stearate and placed in an ethanol-permeable container as shown in JP-A-56-142167.

■Liquid ethanol is placed in various ethanol-permeable containers as shown in Japanese Patent Publication No. 59-30072.

Furthermore, the following are known as ethanol permeable films.

■Perforated polyethylene as shown in Japanese Patent Publication No. 40-25228.

■Polyethylene, silica-containing polyethylene, PE/PVA, E as shown in JP-A-56-22680
VA (vinyl 7-cete) m: T ~ 19%), cellulose triacetate, PVA, etc.

(2) A laminated film of a nonwoven fabric and an ethylene-methyl methacrylate copolymer, as shown in JP-A-61-11365.

[Problem that the invention seeks to solve]

The food preservation device mentioned above is currently in use for food preservation, and as described in Japanese Patent Application Laid-Open No. 57-22680, it is practically used with small holes, abbreviated as "hole poly". Ethanol adsorbents are often used with food in the form of encapsulated polyethylene film sachets. Therefore, if a substance with an apparent low specific gravity such as silicon dioxide is used as the ethanol adsorbent, dry powder Although ethanol is easily obtained, this powdered ethanol is not edible, so if it is used for food preservation, it may cause accidental ingestion or
There is a problem of accidental ingestion, and since the powdered ethanol is bulky, the volume becomes extremely large, which is disadvantageous for packaging and transportation. In addition, when cellulose or starch, which has a high apparent specific gravity, is used as an adsorbent for ethanol, the porosity is low, so when the amount of ethanol adsorbs becomes large, liquid ethanol exists continuously, so the ethanol The adsorbent becomes a wet powder in appearance, which not only makes it difficult to handle, but also causes ethanol to adhere to and contaminate other objects through the small holes in the polyester. Further, the same problem occurs when using the perforated polyethylene described in (1) above.

In addition, the food preservation tools (1) and (2) above both use gelled ethanol, but since they use a synthetic gelling agent, there is a big problem if they are accidentally ingested.

In addition, although the products using liquid ethanol mentioned in (2) above are edible, if the packaging material were to be damaged, the liquid ethanol would directly adhere to the food, causing the surface of the food to crumble and the dye to flow out. There is a risk of losing its commercial value, and if liquid ethanol exceeds 60% by weight, it becomes a dangerous class 4 alcohol, making it difficult to collect.

In addition, there is EVA as shown in (2) above as an ethanol permeable film used as a packaging material for ethanol, but as described in the above-mentioned Japanese Patent Application Laid-open No. 11365/1983, this film has a high thermal stability. The decomposition produces acetic acid, which causes problems such as rust on packaging machinery and transfer of odors to food.

The laminated film described in (2) above was an attempt to solve this problem, but although it has good physical properties, the biggest drawback is that the monomer remains, and the volatilization of this monomer causes odor to food. Not only is this transition, but it also poses safety issues.

As described above, all conventional ethanol food preservation tools have many technical and safety problems.

Therefore, one object of the present invention is to provide a sustained release ethanol food preservation device containing a safe and excellent performance ethanol composition in a container having a predetermined ethanol permeability.

Another object of the present invention is to combine a safe and high-performance ethanol composition with a safe and high-performance container for storing the same, thereby producing a sustained release that is safe and has high performance. Our purpose is to provide ethanol food preservation tools.

[Means for solving problems]

The present invention has an ethanol permeability of 50g/%/24hr15
A mixture of 20 to 70 parts by weight of ethanol and 80 to 30 parts by weight of sugar alcohol is placed in a container partially or entirely made of a film having a temperature of 0RH/40°C or higher.
The above object has been achieved by providing a sustained-release ethanol food preservation device containing a powdered ethanol composition obtained by heating and melting at 100°C, cooling and pulverizing the composition.

Hereinafter, the sustained release ethanol food preservation device of the present invention will be described in detail.

The powdered ethanol composition used in the present invention is ethanol 2
It consists of 0 to 70 parts by weight and 80 to 30 parts by weight of sugar alcohol. Although a powdered ethanol composition can be obtained with less than 20 parts by weight of ethanol, the ethanol content is low, which is disadvantageous for the intended food preservation tool. ethanol is 7
If the amount exceeds 0 parts by weight, the surface of the composition becomes wet with liquid ethanol, which not only makes handling difficult, but also causes ethanol to adhere to other objects and cause contamination.

The ethanol used for producing the powdered ethanol composition is preferably one with a concentration of 95% or more, and most preferably absolute ethanol.

In addition, examples of sugar alcohols used in the production of the powdered ethanol composition include sorbitol, xylift, mannitol, elidrift, trainit, arabit, atonito, dulcitol, and ramnit, which are obtained by reducing sugars. Used alone or in combination of two or more. In particular, it is preferable to use sorbitol and mannitol.

゛In producing the powdered ethanol composition, the ethanol and the sugar alcohol are mixed in the above ratio,
It is necessary to heat and melt the mixture at 50-100°C, preferably 60-90°C.

At this time, ethanol and sugar alcohol become a viscous molten state and are mixed and integrated. When the temperature is below 50°C, ethanol and sugar alcohol are simply mixed and no integration occurs. If the temperature exceeds 90° C., the vapor pressure of ethanol makes it difficult to manufacture at normal pressure, so a pressurizing device is required.

When the temperature exceeds 100°C, the mixture separates into ethanol and sugar alcohol, but if the temperature is lowered to 60-100°C, it returns to a good melting state, so heating above 100°C is not necessary.

The heated melt of ethanol and sugar alcohol is completely solidified by cooling it to below 50°C, and the powdered ethanol composition used in the present invention is obtained by pulverizing this into a desired size. At this time, if production equipment such as a kneader is used, a powdered ethanol composition can be easily obtained without using a pulverizer.

According to an electron micrograph, the structure of the powdered ethanol composition used in the present invention is that ethanol is contained between network-like crystals of bath alcohol, and it is a kind of gel. is completely new and unknown.

Other additives such as pigments, flavors, seasoning ingredients, etc. can be added to the powdered ethanol composition used in the present invention depending on the purpose during production. Further, depending on the purpose of use, other powders such as seasonings, acidulants, salts, sugars, etc. can be added to the powdered ethanol composition.

The powdered ethanol composition used in the present invention is edible,
Consumer power 9. It is completely safe to eat.

In addition, the powdered ethanol composition used in the present invention has good ethanol retention, excellent workability when packaging, and has an ethanol permeability of 50 g/n (/24 hr.
When packaged with a film of 150RH/40°C or higher, a good sustained-release ethanol food preservation device can be made.

Furthermore, the ethanol permeable film used in the present invention has an ethanol permeability of 50 g/n (/24 hr150 RH/
The temperature is 40°C or higher. Ethanol permeability is 50g/
If the temperature is less than m2/24hr150RH/40°C, when a container of an appropriate size is made to house the powdered ethanol composition, the amount of ethanol evaporated is small, making it unsuitable for food preservation.

The ethanol permeability of the ethanol permeable film used in the present invention is selected depending on the food to be preserved. For example, for foods with a water activity of about 80%, the ethanol permeability is 50 to 2000g/ffl/24hr150.
RH/40°C, preferably 200-1500g/r+?
/24hr150RH/40℃ film was used,
In addition, for foods with a water activity of about 90%, the ethanol permeability is 50 to 4000 g/m/24 h r150
RH/40℃, preferably 500-2000 g/m/
A 24hr 150RH/40°C film is used.

Preferred examples of such films include a breathable base material;
Ethylene containing 15 to 25% by weight of methyl acrylate component
Examples include a laminated film formed by laminating a methyl acrylate copolymer, perforated polyethylene, or microporous polypropylene, and a laminated film of an air-permeable base material and the above ethylene-methyl acrylate copolymer is particularly preferred.

The above-mentioned ethylene-methyl acrylate copolymer has a low ethanol permeability when the methyl acrylate component is less than 15% by weight, and it is difficult to obtain it on the market when the methyl acrylate component is more than 25% by weight. I also don't like it.

The appropriate range of the thickness of the ethylene-methyl acrylate copolymer, the porous polyethylene, and the microporous polypropylene varies depending on the rate at which ethanol evaporates from the ethanol generator, etc. For example, in the case of the above-mentioned ethylene-methyl acrylate copolymer, the thickness is preferably 10 to 40μ; if it is less than 10μ, the heat seal strength is low, and if it exceeds 40μ, the ethanol permeability is too low.

Further, as the air-permeable base material, it is preferable to use paper or nonwoven fabric. Suitable papers include Japanese paper, high-quality paper, and kraft paper. Suitable nonwoven fabrics include cellulose, polyester, polyethylene, polypropylene, and polyamide.

The basis weight of both paper and nonwoven fabric is 10 to 350 g/n? The one is good.

If desired, the laminated film may be printed with a pattern on the air-permeable base material side, and may also be provided with a water-repellent overcoat as long as air permeability is not impaired.

The above-mentioned In water-based overcoat serves to protect the printed pattern. When paper or cellulose nonwoven fabric is used as the air-permeable base material, silicone resin or fluororesin is preferably used for the overcoat.

Further, the lamination of the above-mentioned air-permeable base material and the above-mentioned ethylene-methyl acrylate copolymer is such that the ethylene-methyl acrylate copolymer is laminated on one side of the air-permeable base material.
A method of extruding methyl acrylate copolymer to a thickness of 10 to 40μ and laminating it, or applying a urethane adhesive to a thickness of 0.5 to 5μ on one side of a breathable base material and applying it to the adhesive side. This can be carried out by a method of laminating ethylene-methyl acrylate copolymers having a thickness of lθ to 40μ. Further, the above-mentioned breathable base material and the above-mentioned perforated polyethylene or microporous polypropylene can be laminated by the same method.

The above-mentioned laminated film is safe and does not transfer odor or other components even if it comes into contact with food, prevents moisture, oil, etc. in food, and does not cause mixing of these and ethanol.

The container used in the present invention, which is partially or entirely made of a film having the above-mentioned ethanol permeability, can have an appropriate size and shape depending on the purpose of use, such as a bag shape or a stick shape. It can be made into shapes such as , pillow-like, or envelope-like. When making a container using the above laminated film, the air-permeable base material side should be on the outside.

The sustained-release ethanol food preservation device of the present invention is used by being sealed in a container together with food.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to Examples.

Examples 1 to 3 A mixture of 50 g of ethanol and 50 g of D-sorbitol was melted by heating at 60 to 80°C, cooled, and pulverized to obtain a powdered ethanol composition. This powdered ethanol composition is
The ethanol content is 48%, the appearance is a dry powder, and it is edible.

2.1 g of the above powdered ethanol composition was packaged in a pillow shape with a size of 30 x 50 mm using each of the films shown below (packaged with the Japanese paper side of the film outside).
Then, food preservation tools of the present invention were obtained.

Form of film lamination used in Example 1; Japanese paper/perforated polyethylene Overcoat: None Perforated polyethylene: Type Hole diameter 0.1 m Hole arrangement 2011 x 20 m5 Thickness 20 μ Basis weight of Japanese paper: 60 g/rd Ethanol Transmittance: 1200 (unit g/n?/24hr150RH/40°C) Form of film lamination used in Example 2: Japanese paper/NFR-190H Overcoat: None NFR-190H: Microporous polypropylene Pore size 1.6-4. 6μ Washi paper basis weight: 100g/ethanol permeability: 1500 (unit g/rd/24h r150 RH/40℃)
Form of film lamination used in Example 3: Japanese paper/EMA Overcoat: Silicone coat EMA: Ethylene/methyl acrylate 80/2
0 copolymer thickness 20μ Basis weight of Japanese paper: 60 g/rri Ethanol permeability near 50 (unit: g/m2/24hr150RH/40°C) Heat and temperature resistance of food preservation tools obtained in the above implementation @1 to 3 Stability was determined as follows.

Table 1 Heat resistance was determined by observing changes in appearance and odor of the powdered ethanol composition at 40 to 50°C. In addition, the pressure resistance is 0
．． Changes in the appearance of the powdered ethanol composition at 2 Kg/c+J and oozing of alcohol out of the storage utensil were observed.

The evaluation method is as follows.

◎: Good, with no change in appearance, no odor, and no oozing of alcohol to the outside of the storage utensil.

〇2 There is a slight change in appearance, odor generation, or oozing of alcohol, but it is in good condition with no practical problems.

△: Problems such as changes in appearance, generation of odor, and oozing of alcohol to the outside of the storage utensil.

X: Obvious change in appearance, generation of odor, and oozing of alcohol to the outside of the storage utensil were observed, making it unacceptable.

Moreover, the food preservation properties of the food preservation tools obtained in Examples 1 to 3 above were as follows.

Table 2 That is, each of the foods shown in Table 2 above was
It was packed in a nylon/plastic bag together with the food storage utensils obtained in step 3, stored at 25℃, and the number of days until mold appeared is shown in Table 2 above. When stored without any preservatives added, it took 3 days for fresh Chinese noodles to develop mold, 7 days for palmkuchen, and 14 days for half-baked chocolate cake.

From this, it can be seen that the food preservation tool of the present invention has an excellent food preservation effect.

Comparative Example 1 A food preservation tool was prepared in the following manner using potassium stearate gelatinized ethanol as a food preservative. This gelled ethanol contains 162% ethanol,
It has a block-like appearance and is not edible.

1.6 g of the above-mentioned potassium stearate gelatinized ethanol was wrapped in a bellows shape measuring 30 x 50 m with the film shown below (packaged with the Japanese paper side of the film outside) to obtain a food preservation tool.

Form of film lamination used in Comparative Example 1: Japanese paper/MMA Overcoat: Silicone coat MMA: Ethylene/Methyl methacrylate 80/
20 copolymer thickness: 20μ Basis weight of Japanese paper: 50g/ethanol permeability: 450 (unit: g/i/24hr150RH/40°C) Comparative Example 2 Using dextrin-adsorbed powdered ethanol as a food preservative, the following procedure was carried out: and created food preservation tools. This powdered ethanol has an ethanol content of 40%, has a wet powder appearance, and is edible.

2.5 g of the above dextrin-adsorbed powdered ethanol was wrapped in a bellows shape with a size of 3 Q x 5 Q am using the film shown below (wrapped with the Japanese paper side of the film outside) to obtain a food preservation tool.

Form of film lamination used in Comparative Example 2: Japanese paper/perforated polyethylene Overcoat z No perforated polyethylene: type Hole diameter Q, lu + hole arrangement 20 cranes x 2011 m thickness 20 μ Basis weight of Japanese paper: 60 g/ethanol permeation degree: 1200 (unit g/n?/24hr150RH/40°C) Comparative Example 3 A food preservation tool was prepared as follows using commercially available fine powder silica-adsorbed ethanol as a food preservative. This adsorbed ethanol has an ethanol content of 65%, has a dry powder appearance, and is not edible.

1.5 g of the above-mentioned finely powdered silica-adsorbed ethanol was wrapped in a 30×50 crane-sized billow shape using the film shown below (packaged with the Japanese paper side of the film outside) to obtain a food preservation tool.

Form of film lamination used in Comparative Example 3: Wa 111. /EvA Overcoat: None EVA: Copolymer of ethylene/vinyl acetate 84/16 thickness 20μ Washi paper basis weight: 5Qg/n (°Ethanol permeability: too.

(Unit: g/rd/24hr/50R
H/40°C) The stability against heat and temperature of the food preservation tools obtained in Comparative Examples 1 to 3 above was as follows.

Table 3 The evaluation method is the same as in the examples.

In the above stability test, Comparative Example 10 food preservation tool was
The shape of the block changed slightly and there was an odor of methyl methacrylate. Furthermore, the food preservation tool of Comparative Example 2 was defective because it was wet and ethanol oozed out from the holes when heat or pressure was applied. Furthermore, the food preservation tool of Comparative Example 3 was also defective because the film had an acetic acid odor.

〔Effect of the invention〕

The sustained-release ethanol food preservation device of the present invention is used by being sealed in a container with food, exhibits an excellent food preservation effect, and is highly safe against accidental ingestion. 7J, demonstrating unprecedented performance.

Claims (2)

[Claims] (1) Ethanol permeability 50g/m^2/24hr/5
50 to 70 parts by weight of a mixture of 20 to 70 parts by weight of ethanol and 80 to 30 parts by weight of sugar alcohol into a container partially or wholly made of a film having a temperature of 40° C. or higher.
A sustained-release ethanol food storage device containing a powdered ethanol composition obtained by heating and melting at 100°C, cooling and pulverizing the composition. (2) The film is a laminated film formed by laminating a breathable base material and an ethylene-methyl acrylate copolymer containing 15 to 25% by weight of methyl acrylate component, perforated polyethylene, or microporous polypropylene. , a food preservation device according to claim (1).