JP3201842B2 - Manufacturing method of potatoes packed in pouches - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a potato stuffed with pouches and to a potato stuffed potato obtained by the method.

[0002]

2. Description of the Related Art Conventionally, potatoes packed in pouches have been prepared by using peeled and cut potatoes, blanching if necessary, and then using transparent pouches or oxygen foils provided with oxygen barrier properties. It is common to vacuum package in a opaque pouch and sterilize it under pressure and heat. Potato products produced by this method are widely used as materials for the restaurant industry and for general retail use.

[0003]

The potato product produced by the above production method is packaged in a pouch having an oxygen barrier property. However, during sterilization under pressure and heat, browning due to oxygen in the pouch occurs, and -Oxygen permeating into the pouch during storage may cause browning or impair the commercial value of the pouch.

Therefore, sulfite is used as an antioxidant to prevent browning, but its use is often difficult due to the problem of unpleasant odor and the consumer's resistance to additives. In addition, there is also a problem that since the package is vacuum-packed, blocking occurs during sterilization under pressure and heat, and it is difficult to take out the product.

[0005]

Means for Solving the Problems In order to solve the above problems, the present inventors have conducted intensive studies and found that it is extremely effective to perform deaeration packaging together with an oxygen scavenger package. Thus, the present invention has been completed. That is, the present invention resides in a method for producing potatoes packed with pouches, comprising peeling potatoes, degassing and packaging them in a pouch having an oxygen barrier property together with a deoxidizer package, and sterilizing under pressure and heat. .

[0006] In the above method, before peeling the peeled potato into a pouch, the potato may be cut into an arbitrary shape and blanched. Furthermore, the present invention resides in a potato stuffed potato obtained by the above-mentioned production method. Hereinafter, the configuration and operation of the present invention will be described. In the present invention, a pouch having an oxygen barrier property is used. As the composition of the film used for this pouch,
PET / ON / CPP, PET / PVDC / CPP, PET / EVOH / CPP, PET / SiO ₂
Evaporated film / CPP, PET / Aluminum evaporated film / CPP, PET /
ON / Al / CPP etc. (where PET: polyethylene terephthalate, ON: stretched nylon, CPP: unstretched polypropylene, PVDC: polyvinylidene chloride, EVOH: ethylene vinyl alcohol copolymer, Al: aluminum foil is there) .

[0007] The potato can be in any form, for example, a peeled hole form, a sliced form thereof, or a dice-like form. The deaerated packaging is preferably performed so that the amount of residual air in the pouch is 1% or more and less than 80% of the potato volume so that the potato can be easily taken out. When the residual air content is less than 1% of the potato volume, it is difficult to take out the potato after opening, and when the residual air content is 80% or more of the potato volume, the potato is not fixed in the pouch, and is transported. The shape of the potato may be lost due to vibration at the time.

As the packaging material for the oxygen scavenger package used in the present invention, those having water resistance, breakage resistance, safety and hygiene, etc. are preferable. And a perforated film provided with pores of the above is used for part or all of the perforated film. The oxygen scavenger enclosed in the oxygen scavenger package in the present invention is not particularly limited as long as it has an action of absorbing oxygen, but sulfite, bisulfite, dithionite, ferrous iron Salts, hydroquinone, catechol, resorcinol, pyrogallol, gallic acid, longat, ascorbic acid and / or its salts, sorbose, glucose,
A deoxidizer containing ligulin, dibutylhydroxytoluene, or butylhydroxyanisole, or a deoxidizer containing metal powder such as iron powder is used, and ascorbic acid and / or a salt thereof, isoascorbic acid and / or A deoxidizer containing salt or iron powder is preferably used. Of these, oxygen absorbers containing iron powder are particularly preferably used. The amount of the oxygen absorber used is appropriately determined based on the amount of residual air in the pouch.

The pressurized heat sterilization is performed at 100 ° C. or higher. The conditions of pressurized heat sterilization also depend on the conditions of distribution of the potato-shaped product, but assuming normal temperature distribution, the central part is at 120 ° C. for 4 minutes or more (F ₀ value of 3. 1 or more).

[0010]

【Example】

(Example 1) A 1% by weight suspension of polyethylene fiber having a fiber length of 0.9 to 1.3 mm and an average width of 0.01 mm was introduced into a paper machine to form a fiber layer, and then dewatered and dried. 90g / m ²
Was obtained. This sheet material 100
50 parts by weight of a diluted aqueous solution (fluorine resin concentration: 2% by weight) of a water / oil repellent (Asahigard AG530, manufactured by Asahi Glass Co., Ltd.) was impregnated with the resulting mixture, followed by drying to obtain a breathable sheet. Was.

The above-mentioned air-permeable sheet is made of a perforated composite film of PET / LDPE (average porosity: 0.15 mm, number of holes: 1,000,000 /
The sheet was passed between hot rolls together with the m ² ) LDPE surface to prepare a bonded body of a breathable sheet and a perforated composite film. An oxygen scavenger containing iron powder as a main ingredient and an oxygen absorption capacity of 100 ml was enclosed inside the pouch created by the above-mentioned bonded body to prepare an oxygen scavenger package.

[0012] After peeling the potato (Mayqueen), the potato was cut into a dice (about 2 cm square), 5 kg was put into 10 L of hot water at 90 ° C, and a blanching treatment was performed for 5 minutes. 800 g of the potato
To PET / PVDC / CPP (oxygen permeability at 23 ° C: 1.6 cc / m ²
24hrs ・ atm), put in a pouch (200mm × 300mm), sealed the oxygen scavenger package, and then, using a vacuum packaging machine, once decompressed to 200mmHg, introduced air, and performed deaeration packaging. . The amount of residual air in the pouch was about 80 ml when the potato density was 1.0. The packaged potatoes were heated at 120 ° C. and 2.1 kg / cm ² using a hot water retort sterilizer.
A sterilization treatment was performed under the conditions of × 50 minutes. The F ₀ value at the center is
4.2.

Comparative Example 1 Potatoes were treated in the same manner as in Example 1 and packaged without using an oxygen scavenger package.
A sterilization treatment was performed under the same conditions as described above. (Comparative Example 2) Potatoes were treated in the same manner as in Example 1, packaged in a vacuum without using a package of oxygen scavenger, and sterilized under the same conditions as in Example 1.

(Experiment) The potatoes packed in a pouch after sterilization were heated at 37 ° C.
For 90 days, and the color difference was measured over time using a color computer (SM Color Computer SM5 manufactured by Suga Test Instruments Co., Ltd.). As a reference for the undiscolored color, the one obtained in Comparative Example 2 was packaged in an aluminum pouch (PET / Al / ON / CPP) together with an oxygen absorber package (Ageless S manufactured by Mitsubishi Gas Chemical Company) and stored at 0 ° C. It was used (at the time of measurement, both were brought to room temperature and then judged).

The results are shown in Table 1.

[0016]

[Table 1]

[0017]

As described above, according to the method for producing pouched potatoes of the present invention, browning during distribution and storage can be prevented without using an antioxidant. This is an epoch-making thing that can easily take out potatoes at the time of opening, which is a drawback of vacuum packaging.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a potato stuffed with pouches.

FIG. 2 is a sectional view showing one embodiment of a packaging material that can be used for potatoes packed with pouches.

FIG. 3 is a cross-sectional view of an example of a packaging material for an oxygen scavenger package that can be used for potatoes packed with pouches.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pouch which has an oxygen barrier property 2 Potato 3 Oxygen-absorbing agent package 4 Void 5 Polyethylene terephthalate 6 Polyvinylidene chloride 7 Unstretched polypropylene 8 Air-permeable sheet 9 Perforated composite film 10 Oxygen-absorbing agent 11 Opening part

Continuation of the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) A23B ^7/ 00-7/152 JICST file (JOIS) JAFIC file (JOIS)

Claims (5)

(57) [Claims] 1. A process for producing potatoes packed with pouches, comprising peeling potatoes, degassing and packaging them in a pouch having an oxygen barrier property together with a package of oxygen absorbers, and sterilizing under pressure. 2. A method for producing potatoes packed in pouches according to claim 1, wherein the peeled potatoes are cut into an arbitrary shape and blanched before degassing and packaging in a pouch. . 3. The amount of air remaining in the pouch at the time of degassing packaging is as follows:
2. The method according to claim 1, wherein the potato volume is 1% or more and less than 80%. 4. The method according to claim 1, wherein a part or all of the packaging material in the oxygen absorber package is made of a packaging material in which a breathable sheet and a perforated composite film are bonded. A method for producing potatoes packed in pouches. 5. A pouch-packed potato obtained by the method according to any one of claims 1 to 4.