JPS6238233B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for preserving and packaging dried foods such as dried seaweed and furikake. There are several oxygen absorbers that have been used to preserve food. This oxygen scavenger reaction requires some water to initiate the reaction. In addition, the oxygen scavenger absorbs oxygen and simultaneously generates water or water vapor. For this reason, dried foods with a moisture content of 10% or less, such as dried seaweed, furikake foods, and powdered milk, absorb water or water vapor from these reactions and reduce their commercial value, so they should not be treated with oxygen absorbers. The current situation was that it could not be used. The object of the present invention is to provide a method for preserving and packaging dry foods using an oxygen absorber that generates water or steam through such a reaction. The present invention separates an oxygen absorber from a desiccant agent for dry foods such as dried seaweed furikake foods and powdered milk with a moisture content of 10% or less, and simultaneously wraps them in a plastic film with a packaging retainer packaged in an air-permeable material. This is a method for preserving and packaging dried foods. The packaging holding agent 1 according to the present invention is shown in FIGS.
As shown in FIG. 3, the oxygen absorber 2 and the desiccant 3 are separated and packaged with a breathable material. First, as shown in FIG. 1, an oxygen absorber 2 and a desiccant 3 are separated by a partition wall 5 made of a laminated film made of plastic such as polyethylene or polypropylene and aluminum foil, and both are separated from each other by air-permeable materials 6, 6 on the outside. The end portion of the partition wall 5 is sandwiched between the end portions of the breathable material 6, 6 and thermally bonded. Further, as shown in FIG. 2, the oxygen absorber 2 is sandwiched between two partition walls 8, 8, the desiccant 3 is placed on the outside of the deoxidizer 2, the outside is further wrapped with breathable material 9, and the partition wall The ends of 8, 8 are sandwiched between breathable materials 9, 9 and thermally bonded. In addition, as shown in FIG.
The oxygen absorber 2 and desiccant 3 are packaged separately on both sides between 10 and a partition wall 11 is provided between them which is thermally bonded.
Furthermore, the surrounding area is thermally bonded. The desiccant used in the present invention is silica gel, activated aluminum oxide, sodium sulfate, etc. The oxygen scavenger consists of a primary salt of iron group or manganese such as ferrous sulfate having water of crystallization, an alkaline substance such as calcium hydroxide, a sulfite such as sodium sulfite, and necessary additives. Necessary additives include metal powders such as iron powders, adsorbents such as activated carbon, and deliquescent substances such as magnesium chloride and calcium chloride. The breathable material for packaging the retention agent is preferably a laminated material of paper and perforated polyethylene film. A plastic film with low gas permeation resistance is suitable for the entire packaging, and an ethylene-
Laminated materials containing saponified vinyl acetate copolymer films are preferred. Next, examples of the present invention will be described. <Example 1> Polyethylene is coated on one side of high-quality paper with a basis weight of 50 to 70 g/m ² , and a breathable material is made on one side by making holes in the polyethylene so that the air permeability is about 10,000 seconds/100 c.c. Hot glue into an 8cm square shape. At this time the thickness is 60
A low-density polyethylene film of μ is sandwiched and hot-bonded. Then, a package holding agent was created by enclosing an oxygen absorber in one of the two partitions and a desiccant in the other. Here, the oxygen absorber is ferrous sulfate (heptahydrate) 2.94
g, calcium hydroxide 0.79g, sodium sulfite
It consists of 0.27g. The desiccant contained silica gel, anhydrous sodium sulfate, and aluminum sulfate, respectively, and three types of packaging holding agents were created. Then, 10 g of seaweed was accurately weighed as a dry food and sealed with approximately 200 c.c. of air using the respective packaging holding agents and plastic film. Then, the weight increase rate of the seaweed, the oxygen concentration inside the bag, and the sensory evaluation of the seaweed were conducted over time. The results are shown in Table 1. The plastic film used for packaging is a laminated film consisting of stretched polypropylene film (20μ)/saponified ethylene-vinyl acetate copolymer film (17μ)/low-density polyethylene film (60μ).

【table】

[Table] <Example 2> The same retention agent used in Example 1 was sealed between two 60μ thick polyethylene films, and three types of desiccants were placed on both sides in the same manner as in Example 1. It was sealed with the same breathable material as in Example 1. The amount of holding agent and desiccant used is 4.0 each.
It was hot at g. This was sealed together with 10 g of seaweed as in Example 1, and the changes over time were measured in the same manner as in Example 1. The results are shown in Table 2. The packaging plastic film was the same as that used in Example 1.

[Table] <Example 3> Using the same holding agent as that used in Example 1, three types of packaging holding agents were obtained using each desiccant. The form of the packaging holding agent is as shown in FIG. The amounts of oxygen scavenger and desiccant used were 4.0 g and 10 g, respectively. This was enclosed in a plastic film together with 10 g of seaweed, and changes over time were measured in the same manner as in Examples 1 and 2. The results are shown in Table 3. Note that the plastic film is the same as that used in Example 1.

【table】

[Table] The packaging of Example 3 was good in that it had a fast oxygen absorption rate and a small weight increase rate. The ratio of oxygen scavenger and desiccant in this holding agent may be changed depending on the moisture content of the dried food.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, and FIG. 3 are cross-sectional views of a packaging holding agent used in the packaging method of the present invention. 1...Package holding agent, 2...Oxygen absorber, 3...Drying agent,
5, 8, 11... Partition wall, 6, 9, 10... Breathable material.

Claims (1)

[Claims] 1. Dried food with a moisture content of 10% or less is packaged with a plastic film at the same time as a packaging holding agent that separates the desiccant from the oxygen scavenger that generates water or water vapor through a deoxidizing reaction and wraps both with a breathable material. A storage packaging method for dry foods featuring: