JPH0787764B2 - Food preservative - Google Patents

Description

TECHNICAL FIELD The present invention relates to a food preservative used by being inserted into a sealed food container.

2. Description of the Related Art Various foods such as bread, Western confectionery, noodles, Japanese confectionery, seafood, and livestock foods are sold in a sealed container, particularly in a plastic film bag. These sealed containers contain various preservatives for foods. As one of such preservatives, ethanol is impregnated into a porous adsorbent, which is then passed through a paper or nonwoven fabric that allows ethanol vapor to pass through. It is known that they are put in a small bag such as a plastic film. As such an example, Japanese Patent No. 1046326 (Japanese Patent Publication No. 55-2273) discloses silicon dioxide, microcrystalline cellulose or vacuum freeze-dried α.
A substance obtained by adsorbing ethanol on an adsorbing substance made of starch has a pore volume of 0.6 ml in JP-A-61-111675.
It is shown that ethanol is adsorbed on a porous adsorbent of / g or more.

However, conventionally, the adsorbents for ethanol that have been generally used have a low adsorbability, or have an excessive ethanol retention and adsorption force and are inferior in ethanol desorption, or the adsorbent itself has an extremely small size (usually 200 There was a problem such as (more than mesh). In particular, silicon dioxide (light anhydrous silicic acid), which is a typical adsorbent that has been used in the past, has an extremely small particle size of 200 mesh or more, and when this is filled in a small bag and the inlet of the bag is sealed, dust There is a problem that the adsorbent is scattered and the adsorbent adheres to the seal part, and the work efficiency is reduced or the sealing is incomplete, and the adsorbent fine powder leaks to the outside from the seal part of the pouch when used and contaminates food. Was there. Moreover, the deterioration of the working environment due to dust has been a problem. Although such a problem is solved by using an adsorbent having a relatively large particle size, in reality, an adsorbent having a large particle size, excellent ethanol adsorption capacity, and moderate ethanol vaporization property is used. unknown.

Furthermore, the silicon dioxide and microcrystalline cellulose described in Patent No. 1046326 are in the form of fine powder of 200 mesh or less, and especially when ethanol is adsorbed, the fluidity is remarkably reduced, and the enclosed weight easily fluctuates during high-speed bag making, and further microcrystalline. Cellulose has an ethanol adsorption capacity of 50% compared to, for example, silicon dioxide.
%, Which is low, and results in being bulky when the same amount of ethanol is enclosed, which is unsatisfactory in terms of bag-making efficiency and economical efficiency. Further, since vacuum freeze-dried α-starch has a relatively large amount of ethanol adsorbed and can have a large particle size, it is satisfactory to some extent in terms of dispersibility and fluidity. It requires a process, is expensive, and has a strong affinity with ethanol and is inferior in ethanol evaporation. Furthermore, since it has strong hygroscopicity and is easily soluble in water, it is necessary to prevent moisture absorption during bag-making work, and when used as a food preservative, it easily liquefies by the water evaporated from the food to increase the ethanol concentration. In some cases, it may not be possible to lower the ethanol evaporation rate.

In addition, as a preferable example in JP-A-61-111675, calcium silicate, which is shown in addition to silicon dioxide, has been used for a long time (for example, Food Engineering
g) 34 (6), 89,1962) It is famous as a powdering agent for liquids, but this one also has the same particle size as silicon dioxide and has the same drawbacks as silicon dioxide.

As described above, it is hard to say that the ethanol adsorbent used in the conventional method has appropriate physical properties.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention provides a food preservative which is excellent in ethanol adsorption capacity, sustained release, and fluidity during ethanol adsorption, and in which the adsorbent is unlikely to bite into the seal portion during bag packing. To aim.

Means for Solving the Problems The present invention relates to a food preservative obtained by adsorbing ethanol to calcined muscovite having a particle size of substantially 5 to 100 mesh.

The most characteristic requirement of the present invention is that calcined muscovite is used as the ethanol adsorbent. Firing muscovite is used as an insulating material and a horticultural material, but no example of using it as a food preservative is known. Baked muscovite is especially 650 ℃
Those fired in the range from 1 to 900 ° C. are preferred, and those having a particle size in the range of substantially 5 to 100 mesh are suitable.

In the present invention, having a particle size of 5 to 100 mesh means particles obtained by further passing particles passing through a 5 mesh screen through a 100 mesh screen.

Therefore, this fractional particle originally means that it does not include particles larger than 5 mesh and particles smaller than 100 mesh, but even in such a case, by intentionally adding a small amount of particles smaller than 100 mesh, It is possible to achieve the same effect as that obtained with the present invention. The amount is different depending on the average particle size of particles in the range of 5 to 100 mesh and the particle size of fine particles to be mixed, so it is difficult to say unconditionally, but generally 30% by weight or less (particles of 5 to 100 mesh are 70% by weight or more), preferably 20% by weight or less, more preferably 10% by weight or less. As used herein, "substantially 5-100 mesh" is meant to include such embodiments. Even in such a case, the average particle size is preferably in the range of 5 to 100 mesh. Particularly preferably, the average particle size is 500 to 3000 μm, and more preferably 800 to 2500 μm.

When muscovite-based natural mica is fired in the range of 650 ℃ to 900 ℃, the coarsening of the pore size gradually progresses, and the adsorption and desorption of ethanol can be carried out smoothly and the ethanol adsorption amount is 4.0 ml. increase to about / g. If the firing temperature is 650 ° C or lower, the pore volume and pore diameter are too small.
When the temperature is 0 ° C. or higher, the pore volume tends to be gradually decreased, which is inconvenient for the present invention. Also, if it is fired in the range of 650 ° C to 900 ° C, the pulverization becomes easy and the particle size can be adjusted between 5 and 100 mesh. As a result, the fluidity suitable for bag making is obtained, and high-speed bag making is easily possible. When it is larger than 5 mesh and smaller than 100 mesh, the fluidity is deteriorated in any case, which is not suitable for the present invention. The pore volume of the calcined muscovite used in the present invention is preferably 1.0 ml / g or more, more preferably about 1.5 to 5.0 ml / g. Pore volume is 1.0 ml /
If it is less than g, the amount of adsorbed ethanol becomes too small, the adsorbing power of ethanol increases, and the transpiration property of ethanol becomes unsatisfactory, which is a problem in practical use. On the other hand, if it is more than 5.0 ml / g, the retention capacity of ethanol becomes a problem.

The natural mica used in the present invention needs to be a muscovite system, and the biotite system containing Mn, Fe, etc. is difficult to adjust the pore conditions suitable for ethanol adsorption by firing, and the contained component is preferable in terms of food hygiene. No, it is not suitable for the present invention.

The ethanol adsorbent packaging material used in the present invention is a non-woven fabric having a Gurley air permeability of 5 to 4,000 sec / 100 ml air,
It can be widely used for laminated paper and films.

Hereinafter, the present invention will be described with reference to examples.

Example (1) Preparation of calcined muscovite 50 g of natural muscovite (produced in South Africa, average particle size 2120 μm) was calcined in a horizontal electric furnace under the conditions shown in Table 1 and pulverized with an atomizer. Pass through a 5 mesh (approximately 4000 μm) sieve and
The pore volume of the calcined muscovite retained on a 0 mesh (about 149 μm) sieve was measured using the mercury porosimetry, and this is also shown in the table.
Shown in 1.

(2) Preparation of food preservative 1 g of the baked muscovite mica prepared above was put into ethanol, and after filtration, the weight was measured to measure the amount of adsorbed ethanol.
This was packed in a Gurley air permeability 130 sec / 100 ml air perforated polyethylene laminated paper pouch (size 60 x 60 mm). Castella 160g is wrapped with a polyvinylidene chloride laminate film, and the small bag containing the food preservative is inserted into it.
Stored at 25 ° C. The number of days until mold colonies appeared on the surface of the castella was defined as the number of storage days. The results are shown in Table-2.

Table-2 Food preservatives Adsorption amount of ethanol Number of preservation days A 0.2g 6 days B 0.9g 14 days 1 1.8g 60 days or more 2 2.1g 60 days or more 3 1.9g 60 days or more Test Example Next, the above-mentioned sample 3 baked muscovite And silicon dioxide (Aerosil 200; manufactured by Nippon Aerosil Co., Ltd.) and vacuum freeze-dried α-starch (Pharmaceutical potato starch gelatinized, freeze-dried and crushed to a particle size of 5-100 mesh), and microcrystals 40 ml of 9 per 20 g of cellulose (Avicel; manufactured by Asahi Kasei Co., Ltd.)
Food preservatives a to d were obtained by adsorbing 9.5% ethanol in order and used in the following tests. However, when microcrystalline cellulose is used as the adsorbent (food preservative d), half of 20 ml of 9
Since 9.5% ethanol was added to the mixture to form a paste, it was judged to be inappropriate and excluded from the subsequent tests.

(1) (Measurement of fluidity) The angle of repose of each of the food preservatives a to c was measured using a three-wheel type repose angle measuring instrument. The results are shown in Table-3. The product a of the present invention had the smallest angle of repose and excellent fluidity.

Table-3 Food preservatives Angle of repose a (product of the present invention) 36 ° b (Silicon dioxide) 47 ° c (Vacuum freeze-dried α-starch) 49 ° (2) (Measurement of scattering properties) Food preservatives a to c The sex was measured as follows. Fix a glass funnel with an inner diameter of 17 mm at a height of 10 cm from the floor, insert 5 g of each food preservative into the funnel while pressing the funnel exit with a plate, quickly remove the plate and drop the contents to the floor surface. The diameter of the food preservative spread in a circle was measured. The results are shown in Table-4. It was judged that b was more prone to scattering than the inventive product a.

Table-4 Food preservatives Diameter (cm) a (Invention product) 10 b (Silicon dioxide) 17 c (Vacuum freeze-dried starch) 12 (3) (Measurement of ethanol transpiration) Food preservatives a to c 1 g each Gurley type air permeability 1200sec / 100m
l Air perforated polyethylene laminated paper pouch (size 5
5 × 45 mm) and the ethanol transpiration property at 25 ° C. was measured. The results are shown in Figure 1. The product a of the present invention showed a good transpiration property, but the product c had a low transpiration property.

(4) Food preservative encapsulation work 80 kg of each food preservative a to c was prepared by the above preparation method, and 2 g of this was prepared using a filling and packaging machine manufactured by Sanko Machine Co.
60 by continuous perforated polyethylene laminated paper
It was filled at a rate of 88 pieces per minute so as to form a pouch of a size of 60 mm. In continuous operation for 6 hours, when a, which is the product of the present invention, was used, no clogging or biting into the seal portion due to poor fluidity occurred. However, when b was used, about 30% of the small bags were caught in the seal.
When c was used, it was good for about the first 2 hours, but after that, the adhesion of the adsorbent to the machine increased, and clogging frequently occurred.

EFFECTS OF THE INVENTION As described above, the ethanol adsorbent obtained by adsorbing an appropriate amount of ethanol on the muscovite-based natural mica produced according to the method of the present invention enables easy high-speed bag making, and the present invention thus produced. The ethanol generator of (1) can greatly improve the preservation of food by enclosing it with food.

[Brief description of drawings]

FIG. 1 is a graph showing the transpiration property of ethanol over time.

Claims (2)

[Claims] 1. A food preservative obtained by adsorbing ethanol on calcined muscovite having a particle size of substantially 5 to 100 mesh. 2. The food preservative according to claim 1, wherein the pore volume of baked muscovite is 1.5 to 5.0 ml / g.