JPH0292259A - Food preservative - Google Patents

Abstract

PURPOSE:To obtain a food preservative excellent in ethanol adsorptivity, its sustained releasability and fluidity in ethanol adsorption and ensuring the adsorbent not to be latched to the sealed part when bagged by making ethanol adsorb on calcined mica. CONSTITUTION:The objective food preservative to be used by being put into sealed food containers can be obtained by making ethanol adsorb on calcined mica (pref. ca.1.5-5.0ml/g in pore volume; virtually 5-100mesh in terms of mean granular size, pref. 500-3000mum more pref. 800-2500mum in granular size) prepared by calcination at 650-900 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a food preservative that is inserted into a sealed food packaging bag.

BACKGROUND OF THE INVENTION Various foods such as bread, Western sweets, noodles, Japanese sweets, seafood foods, and livestock foods are sold in sealed containers, especially plastic film bags. These sealed containers contain various food preservatives, but the
It is known to impregnate ethanol into a porous adsorbent and place it in a pouch made of paper, non-woven fabric, etc. that is permeable to ethanol vapor. An example of this is JP-A-611.
Publication No. 11675 discloses a porous adsorbent having a pore volume of 0.6 mρ/g or more in which ethanol is adsorbed.

However, conventionally used adsorbents for ethanol have a small adsorption amount, or have limited ethanol retention.
Either the adsorption power is too high and the ethanol removal performance is poor, or
There was a problem in that the size of the adsorbent itself was extremely small (more than 200 meshes per M). In particular, silicon dioxide, which is a typical adsorbent used conventionally, has a particle size of 200
It is extremely small, larger than Menonyu, and when it is filled into a pouch and the entrance is sealed, the adsorbent adheres to the sealing part, reducing work efficiency or making the seal incomplete. This caused problems such as fine powder leaking outside and contaminating food. This kind of problem is
This can be solved by using adsorbents with relatively large particle sizes, but
In reality, no adsorbent is known that has large particle size, excellent ethanol adsorption ability, and moderate ethanol transpiration.

Furthermore, silicon dioxide and freeze-dried starch are in the form of fine powders with a mesh size of 200 mesh or less, and when they adsorb alcohol, their fluidity decreases significantly, making it easy for the enclosed weight to fluctuate during high-speed bag making.
In addition, crystalline cellulose has a low ethanol absorption amount of less than 50% compared to silicon dioxide (for example, it becomes bulky when enclosing the same amount of ethanol, which is unsatisfactory in terms of bag-making efficiency and economic efficiency. .

As mentioned above, it cannot be said that the ethanol adsorbent used in the conventional method necessarily has appropriate physical properties.

Problems to be Solved by the Invention The present invention aims to provide a food preservative that has excellent ethanol adsorption ability, sustained release properties, and fluidity when adsorbing ethanol, and which prevents adsorbents from getting caught in the seal portion during bagging. purpose.

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

The most characteristic feature of the present invention is the use of calcined muscovite as the ethanol adsorbent. Calcined muscovite is used as an insulating material and a gardening material, but there are no known examples of its use as a food preservative.

The calcined mica is preferably one calcined in the range of 650°C to 900'C, and its center particle size is 5 to 10
Anything in the 0 mesh range is suitable.

When muscovite-based natural mica is fired at a temperature in the range of 650°C to 900°C, the pore diameter gradually becomes coarser, allowing smooth adsorption and desorption of ethanol. The amount of adsorption also increases to about 2 x Q/. If the firing temperature is below 650°C, the pore volume and diameter will be too small, and if the firing temperature is above 900°C, the pore volume will tend to gradually decrease, which is disadvantageous to the present invention. Furthermore, when fired at a temperature in the range of 650 DEG C. to 900 DEG C., pulverization becomes easier and the center particle size can be adjusted to between 5 and 100 meshes. This provides fluidity suitable for bag making, making it possible to easily make high-speed bags. If the number of meshes is 5 or more and 100 or less, the fluidity decreases and is unsuitable for the present invention.

The pore volume of the calcined muscovite used in the present invention is 1.0 m (21
g or more, more preferably about 1.5 to 2.2n+12/g. The pore volume is 1. If it is smaller than omff/g, the amount of ethanol adsorbed will be too small, the adsorption power of ethanol will increase, and the evaporability of ethanol will be unsatisfactory, which is a practical problem. Moreover, if it is larger than 2.2 m12/g, the ability to retain ethanol becomes a problem.

The natural mica used in the present invention needs to be a muscovite type, and the biotite type containing Mn, Fe, etc. is difficult to prepare pore conditions suitable for ethanol adsorption by firing (or the contained ingredients are food hygienic). This is not preferred and is not suitable for the present invention.

As the packaging material for the ethanol absorbent used in the present invention, a wide variety of materials such as nonwoven fabric, laminated paper, and film having a Gurley air permeability of 50 to 400 sec/100 TanQ can be used.

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

Example Preparation of calcined muscovite Natural muscovite (produced in South Africa, average particle size 2120 μm) 5
0g was fired in a seedling-shaped electric furnace under the conditions shown in Table 1, and wall-framed with an atomizer. The pore volume of the calcined muscovite that passed through the 5 mesh sieve and was retained on the 100 mesh sieve was measured using the mercury intrusion method, and is also shown in Table 1.

Table-1 1 g of calcined muscovite prepared above was poured into ethanol,
After filtration, the weight was measured to determine the amount of ethanol adsorption. This is Gurley type air permeability 130sec/100t
It was packed in a perforated polyethylene laminate paper pouch with a size of x(l). 160 g of castella was wrapped in a polyvinylidene chloride laminate film, the above food preservative sample bag was inserted into this, and the bag was stored at 25°C.

The number of days until mold colonies appear on the surface of the castella cake was defined as the number of storage days. The results are shown in Table-2.

Table 2 Based on the poor fluidity of the preservative (no cases of clogging or clogging of the sole occurred).

Effects of the Invention As described above, the ethanol adsorbent in which an appropriate amount of ethanol is adsorbed to the muscovite-based natural mica produced according to the method of the present invention can be easily made into bags at high speed, and can be manufactured in this way. The ethanol generator of the present invention can greatly improve the preservation of food by packaging it together with food.

Claims (1)

[Claims] 1. A food preservative prepared by adsorbing ethanol to calcined muscovite having a central particle size of 5 to 100 mesh. 2. The food preservative according to item 1, wherein the calcined muscovite has a pore volume of 1.5 to 2.2 ml/g.