JPH055004Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a freshness-preserving sheet used for packaging, distribution containers, and storage of frozen foods, refrigerated foods, and other fresh foods.

[Conventional technology]

When fresh food is kept in a storage case at low temperatures (frozen, chilled), the temperature rises over time, causing drips (moisture contained in the food, body fluids, water droplets from washed food, seasoned food, etc.) juice, oil, etc.) are generated.

In this case, quality deteriorates due to dripping. Conventionally, therefore, a method has been used in which a single layer of nonwoven fabric is sandwiched between foods to absorb drips.

[Problem that the invention attempts to solve]

However, when the drips are absorbed, the lower part of the food and the upper part of the food under the sheet get soaked with the dripped moisture, which wets the top and bottom surfaces of the food, resulting in poor quality, stains, and poor appearance, resulting in economic losses. He was wearing a mask.

When frozen and chilled foods are stored in thermal boxes, there is a significant drop in quality due to dripping. In addition, many frozen and chilled foods include fish,
There is a lot of meat such as beef and pork, and most of this meat is red. These foods contain hemoglobin, and when fresh, the cut side is dark red, but when it is oxidized by oxygen in the air, the cut side turns bright red. This case is the best in terms of quality, and as the degree of oxidation progresses beyond this, the color changes from reddish-black to brown.

The present invention takes these conditions into consideration and aims to provide a food preservation sheet that can uniformize oxidation and prevent quality deterioration due to dripping.

[Means for solving problems]

In order to achieve the above object, the food preservation sheet of the present invention, as shown in Figs. 1 and 2,
It is formed by joining low-density water-absorbing layers 2 and 3 to both or one side of a high-density water-absorbing layer 1.

As the high-density water-absorbing layer 1, a high-density nonwoven fabric of pulp/synthetic fiber, pulverized pulp, cotton, or a water-absorbing polymer is used. Note that rayon, polyester, polyethylene, etc. are used as the synthetic fiber.

On the other hand, as the low-density water absorption layers 2 and 3, pulp
A low-density nonwoven fabric of synthetic fibers is used. Note that rayon, polyester, polyethylene, etc. are used as the synthetic fiber.

Further, as shown in FIG. 3, a layer consisting of a high-density nonwoven fabric layer 1 and a water-absorbing polymer layer 6 provided within the non-woven fabric layer is used as the high-density water-absorbing layer, or a layer consisting of a water-absorbing polymer layer 6 is used as the high-density water-absorbing layer. In some cases, a water-absorbing polymer is coated on the surface of a non-woven fabric, and in other cases, it is incorporated into the fibers of a non-woven fabric.

Furthermore, as shown in FIG. 4, a synthetic resin film layer 7 is provided between the high density water absorption layer 1 and the low density water absorption layer 3.
may be established.

In addition, when products are not laminated, the nonwoven fabric of the lower layer may not be provided as shown in FIG.

[Effect]

Drips flowing out from food are absorbed from the top and bottom surfaces of the food preservation sheet. The drips absorbed by the low-density water-absorbing layers 2 and 3 are further absorbed by the high-density water-absorbing layer 1. Therefore, moisture does not accumulate in the low-density water absorption layers 2 and 3, and because of their low density, they have good air permeability, and are always uniformly oxidized and colored from the contact surface with the food surface.

〔Example〕

Examples of the present invention will be described below.

Example 1 The food preservation sheet of this example has the following features as shown in Figure 1.
Low-density water-absorbing layers 2 and 3 are bonded to both sides of a high-density water-absorbing layer 1. As the low-density water-absorbing layers 2 and 3, it is preferable to use pulp or synthetic fiber non-woven fabric that utilizes capillarity, and for the high-density water-absorbing layer 1,
A nonwoven fabric having a higher density than the low-density water absorption layers 2 and 3 is used.

As shown in FIG. 2, this food preservation sheet is stored in a cold insulation case 4 or a heat insulation case made of styrofoam or the like, stacked alternately with food 5.
Perform temperature control. The food 5 that is cut and placed in the case 4 is oxidized by the air inside the case 4 and begins to develop color. In this case, the side surfaces of the food 5 are exposed to air, and the upper and lower surfaces of the food 5 are the low-density water absorption layers 2 and 3.
It oxidizes and develops color when it comes into contact with the air inside.

If drips appear over time,
When drips appear when the frozen state changes to the chilled state, these drips are absorbed by the low-density water absorption layers 2 and 3.
It penetrates into the world.

Moisture that has reached the contact surface between the low-density water-absorbing layers 2 and 3 and the high-density water-absorbing layer 1 is retained in the higher-density nonwoven fabric water-retaining layer. Therefore, the low-density water-absorbing layers 2 and 3 only allow moisture to migrate therein, and since they are low-density nonwovens, they have good air permeability, and air oxidation of the entire food is uniformly carried out. Therefore, the coloring is vibrant and uneven coloring does not occur. Furthermore, since the food surface is not wet due to drips, it is possible to maintain a product-quality appearance.

Example 2 In this example, as shown in Fig. 3, a water-absorbing polymer layer 6 that actively combines with water is provided within the high-density water-absorbing layer 1, so as to further increase the water-absorbing power and water retention capacity. It is composed of Other configurations are Example 1
The same is true for .

Example 3 In this example, as shown in FIG. 4, by sandwiching a synthetic resin film layer 7 between the lower part of the high-density water-absorbing layer 1 and the low-density water-absorbing layer 3, the high-density water-absorbing layer is 1 is configured to prevent moisture from transferring to the low-density water absorption layer 2. In this example,
This is effective when there is too much food in the case or when there is a large amount of dripping. The other configurations are the same as in the first and second embodiments.

Example 4 In this example, as shown in FIG. 5, a low-density water-absorbing layer 2 is bonded to one side of a high-density water-absorbing layer 1, and is used when products are not laminated. The other configurations are the same as in Examples 1-3.

[Effect of idea]

Since the present invention is configured as described above, even if moisture, body fluids, seasonings, etc. drip from the food surface, the food can be stored without damaging its appearance and maintaining its freshness. I can do it. Food may also be contaminated if the surface of the food is coated with moisture, such as chilled or frozen food, if the surface is frozen due to moisture in the air, or if liquid seasoning has been applied to the food. It is possible to maintain freshness.

[Brief description of the drawings]

Fig. 1 is a cross-sectional view showing an embodiment of the food preservation sheet of the present invention, Fig. 2 is a cross-sectional explanatory view showing how the food preservation sheet shown in Fig. 1 is used, and Figs. 3 to 5 are the invention FIG. 3 is a sectional view showing another example of the food preservation sheet. 1...High density water absorption layer, 2, 3...Low density water absorption layer, 4...Cool case, 5...Food, 6...Water absorbent polymer layer, 7...Synthetic resin film layer.

Claims (1)

[Claims for Utility Model Registration] 1. A food preservation sheet characterized by having a low-density water-absorbing layer bonded to both or one side of a high-density water-absorbing layer. 2. The food preservation sheet according to claim 1, wherein the high-density water-absorbing layer is made of a high-density nonwoven fabric of pulp/synthetic fibers, pulverized pulp, cotton, or a water-absorbing polymer. 3. The food preservation sheet according to claim 1 or 2, wherein the low-density water absorption layer is made of a low-density nonwoven fabric made of pulp or synthetic fibers. 4. The food preservation sheet according to claim 1 or 3, wherein the high-density water-absorbing layer comprises a high-density nonwoven fabric layer and a water-absorbing polymer layer provided within the nonwoven fabric layer. 5. The food preservation sheet according to claim 1, wherein a synthetic resin film layer is provided between the high-density water absorption layer and the low-density water absorption layer.