JPH01181742A - Paper for keeping freshness of vegetables - Google Patents

Abstract

PURPOSE:To obtain paper which can keep the freshness of vegetables for a long time by coating paper sheets on one surface with a mixture of an waterrepellent wax-containing emulsion and a thiabendazole or o- phenylphenolcontaining emulsion. CONSTITUTION:An emulsion containing water-repellent wax, preferably in 0.1-10% concentration, is mixed with another emulsion containing thiabendazole or o-phenylphenol, preferably in 0.1-3%. Paper sheets, preferably a paperthermoplastic resin layer-paper laminatings, are coated with the mixture on its one surface to give the objective freshness-keeping paper. Fruits and vegetables can be packed in the vessels made of the paper with high freshness kept for a long time.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a freshness-preserving base paper used to store, preserve, or transport vegetables or fruits, and in particular, the present invention relates to a freshness-preserving base paper used when storing, preserving, or transporting vegetables or fruits. This paper relates to freshness-retaining paper that can maintain freshness for a long time.

(Prior Art) Conventionally, as this type of freshness-keeping base paper, ordinary corrugated paperboard and OPP corrugated paper in which, for example, a biaxially oriented polypropylene film is adhered to one side of the paper are known. Then, these corrugated papers are used to make packaging boxes, so-called corrugated cardboard boxes, and the fruits and vegetables are stored in a corrugated cardboard garden before being stored or transported.

(Problem to be Solved by the Invention) However, among the above-mentioned freshness-preserving base papers, the first ordinary corrugated paper has ventilation holes in the corrugated paper itself, so when it is used as a corrugated box, fruits and vegetables stored within the surface may melt. Instead, there is a problem in that fruits and vegetables release water over time and become dry and soft. next OP
P corrugated paper has a film attached to one side of the paper, so when used as a cardboard box, there is a problem that the box has no air permeability and the fruits and vegetables stored in the box will melt over time, and the melted portion will gradually emit a strange odor. There is.

The present invention solves the above problems, directly stores fruits and vegetables,
To provide freshness preserving paper for fruits and vegetables which can be stored and retains freshness as excellent as that of paper lined with a perforated interior film and stored in a cardboard box.

(Means for Solving the Problems) In order to achieve the above object, the present invention applies a mixed emulsion consisting of an emulsion containing a water-repellent wax and an emulsion containing thiabendazole or orthophenyl to the entire one side of paper. It is characterized by

Examples of the water-repellent wax used in the present invention include natural resin waxes such as pine resin, balsam, and cedar resin, olefin resins, special paraffins, and synthetic resin waxes such as modified waxes. Further, each of the waxes described above may be used alone, or may be used in combination. Then, it is dissolved in water or a solvent to form an emulsion. Wax in the emulsion is also used because it has good workability when applied to paper, prevents moisture from dissipating, prevents deterioration of paper strength due to moisture, acts as an adhesive to attach thiabendazole or ortho-phenylphenol to paper, and for economical reasons. The content is preferably 0.1 to 10%.

Further, thiabendazole or ortho-phenylphenol is dissolved in water to form an emulsion. The content of thiabendazole or ortho-phenylphenol in the emulsion is preferably 0.1 to 3% for economical reasons and to impart bacterial and mold resistance to fruits and vegetables.

The paper used may be any paper that can be made into a box, such as paper made by making cellulose fibers, synthetic fibers, or other fibers, or paper that is pasted on both sides of the core material as a liner material. The thickness of the thermoplastic resin such as polyethylene or polypropyne between the sheets is 10 to 5.
Examples include corrugated paper with a 0μ sheet sandwiched therebetween as the back liner material. For the above reasons, the amount of mixed emulsion applied to one side of the paper is 0.6 to 10 g/rf in terms of wax, and 0.1 to 10 g/r in terms of thiabendazole or orthophenyphenol.
tf is preferred.

In addition, carboxymethylcellulose, polyvinyl alcohol, starch, acrylamide, etc. may be added as a binder to the mixed emulsion, and the viscosity of the mixed emulsion,
Its content is 0.1 to 6% for reasons such as applicability and economy.
is suitable.

(Example) Figures 1 and 2 show an example of implementing the present invention. In the drawings, (1) shows liner material (
3) is the cardboard paper pasted, (4) is the cardboard paper (1)
A thermoplastic resin sheet (
5) kraft paper pasted through, (B) is a mixed emulsion applied to the entire surface of kraft paper (4),
As a result, fruits and vegetables can be stored in a commonly used cardboard box (7) as shown in the second figure.

Next, specific examples and comparative examples of the present invention will be described.

Experimental Example 1 Example 1 Before making a box, as shown in the first diagram, C210X 5125
X Thickness 15 on one side of C210AF corrugated paper (1)
A thermoplastic sheet (5
) and bleached kraft paper (4) of 50 g. A mixed emulsion (8) with an emulsion containing 25% thiabendazole was prepared with 2.0 g1d in terms of wax and 0.0 g1d in terms of thiabendazole.
5g/r& applied.

Comparative Example 1 C210X 5125X C210AP prior to box manufacturing
A biaxially oriented polypropylene sheet with a thickness of 20 μm was attached to one side of the corrugated paperboard.

Comparative example 2 Corrugated paper c210X 5125X C210A
F was used.

Type A-1 cardboard box manufactured according to Example 1 and Comparative Example 1.2 (dimensions: 410 x 220 x 8 hm)
) A sheet-like water-absorbing mat made by sandwiching a polymeric water-absorbing resin material with non-woven fabric is placed on the bottom of the inside of the container, and water is thoroughly soaked in the mat, and salad greens are washed with water on top of the water-absorbing mat (Production area: Hamamatsu Nishi Agricultural Cooperative, Shizuoka Prefecture) 8 Each case was stored upside down, sealed, and vacuum cooled by a conventional method, and then stored in a storage room at room temperature. Two days after harvesting (however, they were transported to the applicant's Central Research Institute in a refrigerated vehicle and Iwatsuki City, Saitama Prefecture and then stored at room temperature) and four days after harvesting (preserved at the place of production without being transported), the cardboard boxes were opened and the odor was removed. When the appearance was examined, the results shown in Table 1 were obtained. The odor was examined visually, and the appearance (state of salad greens) was examined visually and by taking photographs.

Table-1 The overall evaluation in Table 1 was as follows.

O Good O Fair Δ Poor On the other hand, in Comparative Example 1.2, after 2 days of storage, there was an extremely large amount of bad odor and red color, and the stored salad greens were so damaged that they melted.

Therefore, it was confirmed that in Example 1, even after washing the salad greens with water, they did not spoil even after 4 days, had little damage, and were able to maintain their quality over a long period of time.

Experimental Example 2 Example 1 Comparative Example 3 Same as Example 1 C210X 5125X C210AF prior to box making
The aluminum side of a laminated film made by vapor-depositing aluminum on a 12 μm thick polyethylene terephthalate film was attached to one side of the corrugated paperboard with a 15 μm thick polyethylene film interposed therebetween.

Comparative Examples 4, 5, 6, 7, 8, 9, 10.11 C210X 5125X C210AF was used as corrugated paperboard. And only in Comparative Examples 4, 5, 6, 8, 9, and 10 -
A film for covering stored items as shown in Table 2 was used, and a freshness preserving agent as shown in Table 2 was used only in Comparative Examples 7, 8, 9 and 10.

Type A-1 corrugated boxes manufactured according to Example 2 and Comparative Examples 3 to 11 (dimensions: 460 x 805 x
If you do not use a film to cover stored items, place a tray (hereinafter referred to as PSP tray) made of vacuum-formed polystyrene plates on the bottom of a 95 mm (95 mm) interior. Place: Shirane Town Agricultural Cooperative Jurisdiction, Yamanashi Prefecture) 20
If you place the 71 cases directly on the PSP tray and use a film to cover the stored items, first place the film on the PSPS tray, place the 20 peaches on top of it, and then wrap the peaches with the film. It was then sealed.

In addition, when using a freshness-preserving agent, the freshness-preserving agent was placed in the film. Further, only in Comparative Example 11, a cushioning net made of foamed polyethylene was placed to cover the peaches placed on the PSPS tray. After being transported to the Applicant's Central Research Institute in a refrigerated vehicle, they were stored in a storage room at a temperature of 20°C and a humidity of 65%, and the cardboard boxes were opened one and three days after harvest, and the appearance, sugar content, and acidity of each product were determined. According to the flavor test, Table 2
The results shown are obtained. The condition of the cardboard box, film, and peaches should be visually checked and photographed for appearance. The sugar content was measured using a refractometer after squeezing the equatorial pulp of the peach with gauze. The acidity was measured by measuring the acidity of the fruit juice. Measured using a PH meter, and sensory test (3) for taste, meat quality, and aroma.
day later).

As is clear from Table 2, in Example 1, there was almost no difference in sugar content and acidity after 1 day and after 3 days, and even though no freshness preserving agent was used, the taste and meat quality of peaches after 3 days of storage were and fragrance were all at a high level. On the other hand, in Comparative Examples 3 to 11, there were differences in sugar content and acidity after 1 day and after 3 days, and the taste, meat quality, and aroma of peaches after 3 days of retention were all at low levels. Moreover, in Comparative Examples 9 and 10, taste, meat quality, and aroma were at extremely low levels despite the use of freshness-preserving agents.

Therefore, in Example 1, the ripening phenomenon is rapid and the fruit is soft, and in addition, it maintains excellent quality even for peaches, which have many difficulties in maintaining quality after harvesting and transportation, and retains delicious flavor even after 3 days of storage. It was confirmed that it was retained.

Experimental example 3 Example 2 220X 5160X K220A as corrugated paper
The procedure was the same as in Example 1 except that F was used.

Comparative Example 12 220X 5180X K220A as corrugated paper
F was used.

Comparative Example 13 220X 5160X K220AP prior to box manufacturing
A zeolite varnish solution was applied to one side of a corrugated paperboard at a rate of 20 g/g in terms of zeolite.

Comparative Example 14 220X 5160X K220AF prior to box manufacturing
Thiabendazole 2 dissolved in water on one side of corrugated paper
0.5 in terms of thiabendazole for 5% emulsion
g/d applied.

Comparative example 15, 16.17 220X 5160X K220AF as cardboard
was used, and the interior film shown in Table 3 was used.

Type A-1 cardboard boxes manufactured according to Example 2 and Comparative Examples 12 to 17 (dimensions: 400 x 300
Example 2 and Comparative Example 12
．． In the case of 13.14, a 5 kg/l case of eggplant (produced in Yatsushiro Agricultural Cooperative, Niyamanashi Prefecture) was directly boxed diagonally and then sealed. Comparative Examples 15 and 16.1 using interior film
In the case of No. 7, after inserting an interior film bag inside the bag, 5 kg of eggplant was placed diagonally into the bag, and then the bag was sealed. After being transported to the applicant's Central Research Institute in a refrigerated vehicle, the temperature was 20°C.
Stored in a constant temperature and humidity room with a humidity of 65%, the cardboard box was opened 7 days after harvesting, and changes in weight and gas (
When the concentration of (oxygen and carbon dioxide), softening rate, and gloss of the eggplant were investigated, the results shown in Table 3 were obtained.

The change in weight was determined by measuring the weight before the start of the test and at the end of the test to determine the weight remaining rate. Further, the gas concentration was measured by directly collecting 0.5 cc of gas in the container with a gas tight syringe and introducing it into a TCD gas chromatograph. WGloo was used as the column packing material, and INJ/DE
Measured at TTEM -50°C and COL TEN -50°C. Softening rate The weight of the eggplant whose lower part of the calyx had become soft was measured, and the weight ratio was taken as the softening rate.

As is clear from Table 3, Example 2 was able to maintain appropriate oxygen and carbon dioxide concentrations in the orchard, suppressing respiration, and even after 7 days of storage, there was little change in the weight of the eggplants, and the hardness and glossiness of the eggplants remained small. was maintained.

On the other hand, in Comparative Examples 12, 13, and 14, the concentration of oxygen and carbon dioxide in the garden changed, and the weight of the eggplants decreased.
It also became soft and lost its luster. In addition, Example 15, in which eggplants were wrapped in perforated interior film and then stored in the garden,
In 16 and 17, the perforated interior film maintains an appropriate concentration of oxygen and carbon dioxide, suppressing respiration, and even after 7 days of storage, the weight of the eggplant remains small and its hardness and gloss are maintained. Ta.

Therefore, in Example 2, the eggplants were stored and stored directly in the orchard, whereas in Comparative Examples 15 and 16, the eggplants were wrapped in perforated interior film and then stored and stored in the orchard.
．． It was confirmed that there was no inferiority in weight change, hardness, and gloss compared to No. 17. In addition, Example 2 is Comparative Example 15.1
Since there is no need to wrap the eggplant with a perforated interior film as in 6°17, the packaging work is simple and has excellent workability.

(Effects of the Invention) As described above, according to the present invention, a mixed emulsion consisting of an emulsion containing a water-repellent wax and an emulsion containing thiabendazole or ortho-phenylphenol is used as the emulsion applied to the entire one side of the paper. As a result, fruits and vegetables stored in containers made of paper, such as cardboard boxes, can be kept fresh for a long period of time without molding or rotting by suppressing moisture loss. In addition, the fruits and vegetables can be stored and stored directly in containers, and the fruits and vegetables are lined with a perforated interior film, and the freshness of fruits and vegetables can be maintained as excellently as that of containers stored in cardboard boxes. This has the effect of providing freshness-preserving base paper.

[Brief explanation of the drawing]

FIG. 1 is an enlarged side cutaway view showing one embodiment of the present invention, and FIG.
The figure is a partially cutaway perspective view showing an example of a container made using the product of the present invention. (4)...Paper (6)...Mixed emulsion and 3 others Figure 1 Figure 2

Claims (1)

[Claims] 1. A freshness-keeping base paper for fruits and vegetables, characterized in that a mixed emulsion consisting of an emulsion containing a water-repellent wax and an emulsion containing thiabendazole or ortho-phenylphenol is coated on the entire surface of one side of the paper. 2. The base paper for preserving the freshness of fruits and vegetables according to claim 1, wherein the paper is a laminated material in which a sheet of thermoplastic resin is sandwiched between sheets of paper. 3. The freshness-keeping base paper for fruits and vegetables according to claim 1 or 2, wherein the mixed emulsion contains a binder.