JPH0358744A - Peeled apple package - Google Patents

Abstract

PURPOSE:To obtain the subject package excellent in preservation quality, taste and flavor retaining properties by treating a peeled apple with a specific aqueous solution, then placing the treated peeled apple in a bag, etc., composed of a gas barrier resin and hermetically sealing the resultant apple together with a freshness retaining agent therein. CONSTITUTION:The objective package obtained by treating a peeled apple with an aqueous solution composed of (A) L-ascorbic acid, (B) sodium chloride and (C) a water holding substance (e.g. surgaralcohols or oligosaccharides), then placing the treated peeled apple in a bag or container composed of a gas barrier resin(preferably a high-nitrile-based resin, such as an acrylonitrile- based polymer) and hermetically sealing the resultant apple, together with a freshness retaining agent (e.g. disoxidizer, carbon dioxide absorbent or ethylene gas absorbent), therein.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a peeled apple package made of a gas barrier resin, and more specifically, to a peeled apple package that has excellent preservability, taste, and flavor retention. This invention relates to an apple package.

[Conventional technology]

Apples are great for after-dinner desserts, snacks or picnics,
It is widely eaten as a travel companion. However, the skin and core of apples had to be cut with a knife, so they lacked the convenience of being able to be eaten immediately. For this request,
In recent years, peeled apples, in which the skin and core have been roughly removed, have become commercially available. However, these peeled apples were prone to discoloration, had a short shelf life, and were susceptible to loss of flavor. Therefore, research has been carried out to extend the shelf life of peeled apples by packaging them with oxygen absorbers, etc., but the effects have not been sufficient.

In addition, the problems of ripe odor, moisture, flavor such as sweetness, and taste retention remain unsolved.

[Problem to be solved by the invention]

The purpose of the present invention is to dramatically extend the shelf life of peeled apples, which was impossible with conventional methods, and to preserve peeled apples that prevent discoloration, have excellent flavor and taste retention, and have excellent texture. The objective is to provide a package.

[Means to solve the problem]

The present inventors have made extensive studies to solve this problem, and have immersed peeled apples in an aqueous solution containing specific Mi, used a gas barrier resin to package the peeled apples, and This problem was solved by incorporating a freshness-preserving agent to maintain a specific amount of a specific gas within the package, and the present invention was finally brought to fruition.

That is, the present invention provides peeled apples with A. L--ascorbic acid B. Sodium chloride, Liumium C. The peeled apples are treated with an aqueous solution made of a water-retaining substance, placed in a bag or container made of gas barrier resin, and mixed with a freshness-preserving agent. This is a peeled apple package characterized by:

The skin used in the present invention? There are no restrictions on the variety of Riki apples. Peeled apples are preferably those with the core and part or all of the skin removed.

The amount of L-ascorbic acid used in the present invention is as follows:
0.1% to 5% is preferred. More preferably 0.5%
~2%. If it is less than 0.1%, apples are likely to discolor. If it exceeds 5%, the peeled apples will have an unfavorable odor of I,-ascorbic acid.

The amount of sodium chloride/lium chloride used in the present invention is 0% in the aqueous solution.
．． 5% to 5% is preferred. More preferably, 1% to 3%
%. When it is less than 0.5%, apples tend to discolor. If it exceeds 5%, the peeled apple will become salty, which is not desirable.

As the water-retaining substance used in the present invention, any water-retaining substance used in foods can be used. Examples include sugar alcohols, oligosaccharides, and the like.

The amount of water-retentive substance used in wood invention is 1% to 1% in the aqueous solution.
20% is preferred. If it is less than 1%, the water in the peeled apple will easily evaporate and it will become dry.

It may be more than 20%, but it will only increase the cost by 1.

The processing time of peeled apples with an aqueous solution in the present invention is 1 minute or more. If the time is less than 1 minute, the peeled apples tend to discolor, which is not preferable.

Examples of the gas barrier resin used in the present invention include high nitrile resins, polyvinylidene chloride, polyvinyl alcohol, and partially hydrated ethylene-vinyl acetate copolymer. Among them, high nitrile resins are particularly preferably used.

The high nitrile resin used in the present invention is acrylonitrile 1.
It is a copolymer mainly composed of unsaturated nitriles such as lyl and methacrylonitrile, and contains 50% by weight or more of unsaturated nitrile. Examples of monomers copolymerizable with unsaturated di-1-lyl include styrene, butadiene, isobrene, methyl acrylate, ethyl acrylate, methyl methacrylate I, and ethyl methacrylate. L can be used.

In addition, rubber-like polymers such as butadiene-acrylic nitrile copolymer, isoprene-acrylonitrile copolymer, butadiene-styrene copolymer, polybutadiene, polyisoprene, and copolymers mainly composed of unsaturated diI-lyl and Graph I shows the monomers copolymerizable with unsaturated DiI-Ryl and IrI in the presence of these rubbery polymers.
・Polymerized products can also be used.

Each of the above resins may be formed into a film or a sheet by itself, or may be laminated with other resins.

Films and sheets can be formed by known methods such as an extrusion forming method, a calender forming method, and an inflation forming method. The laminated film and laminated sheet 1. are prepared by a known method,
For example, it can be obtained by a dry lamination method, a coextrusion method, or an adhesion method.

The l'' film (lid) of the bags and containers in the present invention may be a single layer film of high nitrile resin with high gas barrier properties, polypropylene, polyethylene, etc.
A multilayer film obtained by laminating the above-mentioned single layer film on a film of polyester, nylon, etc., a multilayer film obtained by laminating another gas barrier resin film, etc. can be used. In the case of a bag, the film is made into a bag-like bag by a known method. In the case of a top film, the film is sealed to the container body by a conventional heat seal method, invulsion seal method, or the like. The film can also be printed, if necessary, to increase the commercial value of the package.

The thickness of the bag and top film of the present invention is determined by the desired gas harrier properties, and particularly in the case of high nitrile resins, it varies depending on the content of unsaturated nitrile monomers, but
As an indicator, oxygen permeability is usually 20cc/rd・at
It is preferable that it is not more than m·2411r.

The container of the present invention is made of a single layer or a multilayer sheet obtained by laminating the above-mentioned gas barrier resin by a conventional extrusion molding method, calender molding method, inflation molding method, etc. Manufactured by shaping. When a high nitrile resin is used, deep drawing is easily possible, and containers of various shapes, such as circles and squares, can be obtained.

The wall thickness of the container of the present invention varies depending on the desired gas harrier properties, internal capacity, required strength, etc., but is usually 100 to 8
00 μm is preferable, and less than 100 μm is not preferable because the container lacks rigidity.

On the other hand, it is possible to exceed 800 μm, but this will only result in poor workability and increase cost.

When resins such as polyvinylidene chloride, polyvinyl alcohol, or ethylene-vinyl acetate copolymer partial hydrate are used for containers, it is difficult to shape the container, heat seal, etc. with these resins alone, , it is necessary to have a multilayer structure with a resin that has excellent heat sealability. When these multi-N structures are molded into a container shape, phenomena such as partially thinning of the barrier layer or breakage of the barrier may occur, which tends to reduce the shelf life of the contents. It is necessary to consider the shape, etc.

When the high nitrile resin in the present invention is used, it has excellent processability, transparency, and heat sealability, so it can be used alone and does not need to have a multilayer structure. In addition, there is no fear that the gas barrier properties will deteriorate due to molding.

The freshness preserving agent used in the present invention includes oxygen, carbon dioxide,
A material that effectively absorbs ethylene gas can be used. Examples include a combination or a mixture of an oxygen scavenger, a carbon dioxide absorbent, and an ethylene gas absorbent.

As the oxygen scavenger used in the present invention, any fast-acting one can be used, but preferably one that exhibits its oxygen scavenging effect within 12 hours. Examples include iron-based and organic-based materials. The oxygen absorber preferably reduces the amount of residual oxygen inside the package to 0.1% or less 12 hours after sealing. If the residual oxygen exceeds 0.1%, the ripening of the peeled apples will progress too much, resulting in a sour taste, deterioration of quality, spoilage, etc.

As the carbon dioxide absorbent used in the present invention, any material that can maintain the amount of carbon dioxide inside the container at less than 1% can be used. Examples include slaked lime, alkali metal or alkaline earth metal hydroxides, and the like.

As the ethylene gas absorbent used in the present invention, any material that can maintain the amount of ethylene gas inside the container at less than 0.1 ppm can be used. Examples include porous mineral powder such as Oya stone, zeolite, activated alumina silica, and the like.

The freshness preserving agent used in the present invention includes the above-mentioned oxygen scavenger,
In addition to the carbon dioxide gas absorbent and ethylene gas absorbent, a porous deodorant such as activated carbon can also be used in combination.

In the present invention, peeled apples are immersed in the aqueous solution, drained, and then placed in a bag together with a freshness-preserving agent and sealed, or placed in a container and sealed with a top film.

[Operation] A peeled apple is immersed in the aqueous solution, drained, and then stored in a bag or container together with a freshness-preserving agent. Ethylene gas generated from peeled apples is quickly absorbed by the freshness preserving agent. Peeled apples also consume oxygen through respiration and generate carbon dioxide gas, which is quickly absorbed by the freshness-preserving agent.

Therefore, peeled apples can be prevented from deteriorating in quality and rotting due to ethylene gas and carbon dioxide gas.

〔Example〕

The present invention will be explained below with reference to Examples.

Production Example 1 Koji 1 was obtained by emulsion polymerization of 75 parts by weight of acrylonitrile and 1-25 parts by weight of methyl methacrylate in the presence of 10 parts by weight of a butadiene-acrylonitrile rubber-like polymer (butadiene content 70% by weight). Lil resin (acryloni 1)
- Lil content, approximately 70% by weight, based on nitrogen analysis value. ) to make a 300 μrn thick seal by extrusion or forming method.
I got it. The obtained sea 1. was vacuum-formed to obtain 1.re.

Production Example 2 Using the same high nitrile resin as in Production Example 1, a film with a thickness of 40 μm was obtained by the inflation method.

Manufacturing example 3 A bag was made using Fill 1 obtained in Production Example 2.

Production Example 4 A bag was obtained using the fill 1 obtained in Production Example 2 and the polyzolobylene fill 1.

Production Example 5 A bag was obtained using a multilayer film of partially hydrated ethylene-vinyl acetate copolymer and polypropylene film 11.

Production Example 6 A bag was obtained using a multilayer film of polypropylene, polyvinylidene chloride, and polyethylene.

Example 1 An apple (Fushi) with its skin and core removed was mixed with 1% by weight of L-ascorbic acid, 2% by weight of salt, and 7% by weight of oligosaccharide SC57 (trade name, manufactured by Nikken Kagaku ■) as a water-retaining substance. %
After soaking in the aqueous solution for 10 minutes and draining the water, it was packed in the 1-ray obtained in Production Example 1, containing Ageless, a product manufactured by Mitsubishi Gas Chemical, as an oxygen scavenger, and slaked lime as a carbon dioxide absorbent.
Activated alkuna was stored as an ethylene gas absorbent, heat-sealed with the film obtained in Production Example 2, and heated at 5°C for 14 hours.
It lasted for days. The results are shown in Table 1.

Example 2 Example 1 was repeated except that the bags obtained in Production Example 3 were filled. The results are shown in Table 1.

Example 3 Example 1 was repeated except that the bags obtained in Preparation Example 4 were filled. The results are shown in Table 1.

Example 4 Example 1 was repeated except that the bags obtained in Preparation Example 5 were filled. The results are shown in Table 1.

Example 5 Example 1 was repeated except that the bags obtained in Preparation Example 6 were filled. The results are shown in Table I.

Comparative Example 1 Example 1 was repeated except that no aqueous solution treatment was performed. Results first
Shown in the table.

Comparative Example 2 Example 1 was repeated except that L-ascorbic acid was used at 6% by weight. The results are shown in Table 1.

Comparative Example 3 Salt was added to O. ] Example 1 was repeated except for the weight percent. The results are shown in Table 1.

Comparative example 4 Example 1 was repeated except that the salt content was 7% by weight.

The results are shown in Table 1.

Comparative Example 5 Example I was repeated except that 0.05% by weight of SE 57 was added. The results are shown in Table 1.

〔Effect of the invention〕

The peeled apple package of the present invention has extremely good storage stability, dramatically extends the shelf life of peeled apples, and provides consumers with peeled apples that have good taste and aroma. This will greatly contribute to the distribution and sale of peeled apples.

Table 1 (note〕 *mark is L ascorbic acid odor

Claims (1)

[Claims] 1. Treating a peeled apple with an aqueous solution consisting of A, L-ascorbic acid B, sodium chloride C, and a water-retaining substance, and placing the peeled apple in a bag or container made of gas barrier resin. , a peeled apple package characterized in that it is sealed together with a freshness preserving agent. 2. Claim 1, wherein the gas barrier resin is a high nitrile resin containing 50% by weight or more of an unsaturated nitrile monomer.
The described peeled apple package. 3. The amount of residual oxygen inside the package was reduced to 0.1 within 12 hours after sealing.
%, the amount of carbon dioxide gas is maintained at less than 1%, and the amount of ethylene gas is maintained at less than 0.1 ppm.