KR100706773B1 - Silver Nano Absorption Pad - Google Patents

Abstract

The present invention relates to an absorbent pad that absorbs liquid generated upon thawing of food. More specifically, the present invention relates to a silver nano absorbent pad containing silver nanoparticles on the upper side of the absorbent pad in contact with the food to prevent bacterial growth on the surface of the food. It is about.

The silver nano absorbent pad 100 according to the present invention includes a film layer 120 which forms an upper appearance and guides moisture generated from the food F downward by contacting the food F, and a nonwoven fabric not subjected to a woven process. The bottom layer 140 and the film layer 120 to form an outer surface and support the film layer 120 in contact with the inner bottom surface of the packaging container B in which the food F is stored. Located between the bottom layer 140 and has a configuration including an absorbing layer 160 to absorb the moisture guided to the lower side of the film layer 120, the film layer 120 is 20 to 500 PPMW (parts per parts) million by weight). According to this configuration, the silver nanoparticles are in direct contact with the surface of the food to prevent bacterial propagation, so that the freshness of the food is maintained for a long time.

Silver nano, moisture, absorption pad, bacteria, freshness

Description

Silver Nano Absorption Pad {A water absorption pad having nano-silver}

Figure 1 is a longitudinal cross-sectional view showing the internal configuration of the silver nano absorption pad according to the present invention.

Figure 2 is a data showing the sterilization test results of the film layer constituting the main portion of the silver nano absorption pad according to the present invention.

Figure 3 is a longitudinal sectional view schematically showing a state in which the silver nano absorbent pad according to the present invention is installed in a packaging container.

Explanation of symbols on the main parts of the drawings

100. Silver nano absorption pad 120. Film layer

122. Handwork 140. Bottom layer

160. Absorbent layer B. Packing container

 F. food

The present invention relates to an absorbent pad that absorbs liquid generated upon thawing of food. More specifically, the present invention relates to a silver nano absorbent pad containing silver nanoparticles on an upper portion of the absorbent pad in contact with the food to prevent bacterial growth on the surface of the food. It is about.

In general, foods such as meat, fish, vegetables, and fruits are thawed, or when the cells are destroyed, the fluid inside and outside the cells flows out to reduce the freshness of the food. When the freshness of food is reduced, the moisture retention of the food is lowered, and more liquid flows out of the food, which accelerates the self-decomposition, bacterial growth and decay.

Therefore, in order to maintain the freshness of the food must absorb the liquid generated from the food, there are various ways to absorb such liquid.

For example, when the liquid is absorbed from the food using a paper or a sponge, the food and the liquid appear to be separated from each other, but there is a difficulty in maintaining the freshness of the food because they are in contact with each other.

In order to solve this problem, recently, the liquid permeable top sheet, the fluid impermeable bottom sheet, and an absorbent material layer disposed therebetween are used to further improve the freshness of the food by keeping food and liquid separated from each other. Absorption pads have been proposed and widely used.

As a specific conventional absorbent pad, Korean Patent Laid-Open Publication No. 1992-2324 suggests an absorbent pad in which a powdered or granular edible sugar is located between a semipermeable membrane and a water absorbent porous sheet.

In addition, Korean Patent Laid-Open Publication No. 1990-3038 proposes an absorption pad including a fluid permeable top sheet and a bottom sheet, and an absorbent material such as pulp and carboxymethyl cellulose is arranged between the top sheet and the bottom sheet.

In addition, Korean Patent Laid-Open Publication No. 1999-87146 includes an upper sheet and a lower sheet coupled to form one or more cells, and an absorbent is positioned inside the cell, and the upper sheet or the lower sheet is formed with microperforations and is a liquid impermeable material There is proposed an absorbent pad formed of

However, the absorbent pad of the disclosed patent structured as described above has the following problems.

That is, when the absorbent material absorbs and expands the liquid discharged from the food, the absorbent material itself is easily leaked to the outside of the absorbent pad.

In addition, when the absorbent material leaks out of the absorbent pad, the absorbent material is in direct contact with the food being stored, thereby reducing the freshness of the food.

In addition, since the top sheet in direct contact with food is not configured to prevent any deterioration of the food, there is a problem that the storage date of the food is not long.

An object of the present invention is to solve the problems of the prior art as described above, by providing a silver nano absorbent pad to maintain the freshness of food for a long time by containing 20 to 500 PPMW of silver nano to suppress bacterial growth in the film layer in contact with food. It is in doing it.

It is another object of the present invention to provide a silver nano absorbent pad which comprises a water absorbing layer absorbing liquid spilled from food and composed of powdered pulp and polyacrylic acid to maximize the water content and prevent the outflow of absorbed water. Is in.

Silver nano absorbent pad according to the present invention for achieving the above object is formed into a film layer for forming the upper appearance and contacting the food to guide the moisture generated from the food to the lower side, and non-woven fabric not subjected to the woven process A bottom layer which forms an outer surface and contacts the inner bottom surface of the packaging container in which the food is stored and supports the film layer, and an absorbent layer positioned between the film layer and the bottom layer to absorb moisture guided below the film layer. It has a configuration that includes, the film layer is characterized in that the silver nanoparticles containing 20 to 500 parts per million by weight (PPMW).

A film layer which forms an upper appearance and contacts moisture with the food and guides the moisture generated from the food downward, and is formed of the same material as the film layer to form an outer appearance and to contact the inner bottom surface of the packaging container in which the food is stored. And a bottom layer supporting the film layer, and an absorbing layer positioned between the film layer and the bottom layer to absorb moisture guided to the lower side of the film layer, wherein the film layer contains 20 to 500 PPMW (silver nanoparticles). parts per million by weight).

The film layer is characterized in that formed of polyethylene or polypropylene.

The entire surface of the film layer is characterized in that a plurality of pores are formed to guide the downward flow of water generated from food.

The bottom layer is characterized in that formed of any one of polyester (PET), polypropylene (PP), polyethylene (PE).

The bottom layer is characterized in that it is formed of polyethylene or polypropylene.

The absorbing layer is characterized in that it comprises a powdered pulp formed by processing the plant fibers, and polyacrylic acid to absorb water in a stirred state with the powdered pulp.

According to the present invention having such a configuration, there is an advantage that the washing of the filtration yarn is easy and the purification ability is improved.

Hereinafter, with reference to the accompanying drawings, the configuration of the silver nano absorption pad according to the present invention will be described in detail.

Figure 1 is a longitudinal cross-sectional view showing the internal configuration of the silver nano absorption pad according to the present invention, Figure 2 is a data showing the results of the sterilization test of the film layer constituting the main portion of the silver nano absorption pad according to the present invention. .

As shown in these figures, the silver nano absorbing pad 100 according to the present invention is composed of a plurality of layers, and the plurality of layers are thermally fused to each other while passing through a pair of heat fusion rollers (not shown). By attaching them) so that they are integrated without being separated.

That is, the silver nano absorbent pad 100 has a film layer 120 seated in a state in which food (F in FIG. 3) is in contact with an upper surface, and a bottom layer in which fibers are arranged in parallel or in an opposite direction and bonded with a synthetic resin adhesive ( 140, and an absorbing layer 160 for absorbing the liquid generated from the food (F).

 The film layer 120 is formed as a thin film made of polyethylene or polypropylene to form a top surface of the silver nano absorbent pad 100, and is in direct contact with food (F) to support a load. In addition, the film layer 120 is configured such that the liquid generated from the food F seated on the upper side may flow downward.

That is, a plurality of pores 122 are formed in the entire surface of the film layer 120 so that the inside thereof communicates with the upper and lower sides of the film layer 120. Therefore, the liquid generated from the food placed on the upper surface of the film layer 120 is allowed to flow downward through the pores 122, the absorption layer 160 to absorb the liquid.

Silver film (not shown) constituting the main portion of the present invention is incorporated in the film layer 120. The silver nanoparticles are contained in the film layer 120 at 20 to 500 parts per million by weight (PPMW) to sterilize the bacteria of food (F) in contact with the top surface of the film layer 120 (see FIG. 3). )

That is, as shown in FIG. 2, the film layer 120 containing 184PPMW of silver nanoparticles was used as a test piece, and as a result of sterilization test by applying Staphylococcus aureus and Escherichia coli as test bacteria, an initial 2.9 × 10 ⁵ (CFU / ml) The inoculum concentration of showed a bacteriostatic reduction rate of 99.9% after 24 hours.

In addition, the silver nanoparticles generate sterilization ability when the content is 20 PPMW, and when the content is 500 PPMW or more, the sterilization ability is gradually lowered due to the increase of the content, thereby reducing the economic efficiency of the silver nano absorption pad 100. The content is preferably applied at 20 to 500 parts per million by weight (PPMW).

The film layer 120 is molded using polypropylene or polyethylene resin as a main raw material, and after mixing silver nanoparticles with the polypropylene or polyethylene resin to make a master chip, the master chip thus prepared is mixed with general polypropylene or polyethylene resin. Through a biaxial operation process, a thin film shape is obtained.

On the other hand, the bottom layer 140 forms the bottom surface of the silver nano absorption pad 100, and has an absorption function for accommodating the liquid therein. Therefore, when the silver nano absorbent pad 100 is placed on the bottom surface of the packaging container (B in FIG. 3), when the bottom surface of the bottom layer 140 comes into contact with the inner bottom surface of the packaging container B, packaging The liquid accumulated in the bottom surface of the container B can be absorbed.

The bottom layer 140 is formed by selecting one of polyester, polypropylene, and polyethylene. More specifically, as a nonwoven fabric in which fibers are arranged in parallel or in an inverted direction without being woven, the bottom surface of the absorbent pad 100 forms an outer surface and an inner bottom surface of the packaging container B in which the food F is stored. In contact with the film layer 120 to support the film layer 120.

In addition, pores (not shown) are formed in the bottom layer 140. Therefore, by absorbing a small amount of moisture in the pores it is possible to absorb the moisture.

Meanwhile, an absorbing layer 160 is provided between the bottom layer 140 and more specifically, between the bottom layer 140 and the film layer 120. The absorbing layer 160 is a powder pulp (not shown) formed by processing plant fibers in the water flowing through the pores 122 to the lower side of the film layer 120, and polyacrylic acid mixed with the powder pulp to absorb water ( Not shown).

Since the powder pulp is a well known technique, detailed description thereof will be omitted. In addition, the polyacrylic acid is an acrylic polymer partially neutralized by caustic soda, and is widely used in various fields due to low cost, excellent water absorption, and easy manufacturing method. For example, polyacrylic acid is applied to the inside of a disposable diaper.

Hereinafter, a process of absorbing the liquid generated from the food F (eg, frozen fish) using the silver nano absorption pad 100 according to the present invention having the above configuration will be described with reference to FIG. 3.

3 is a longitudinal cross-sectional view schematically showing a state in which the silver nano absorbing pad 100 according to the present invention is installed in the packaging container (B).

First, in the state in which the silver nano absorbent pad 100 is seated on the inner bottom surface of the packaging container B, the food F is placed on the upper surface of the silver nano absorbent pad 100. At this time, the film layer 120 is located on the upper portion of the silver nano absorption pad 100 to be in contact with the bottom surface of the food (F).

The food F placed on the upper surface of the silver nano absorbent pad 100 generates juice in the process of thawing, and the juice flows downward to contact the film layer 120.

The juice reached to the film layer 120 is guided by a plurality of pores 122 formed in the film layer 120 to flow below the film layer 120, the film layer 120 is a liquid inside The food product F is separated from the juice by accommodating in the water and regulating the flow.

In this case, bacteria are sterilized by the silver nanoparticles contained in the film layer 120 at the portion where the food F and the film layer 120 come into contact with each other, and the silver nano absorption pad ( Even if there is moisture that cannot be removed before the 100 is settled, bacteria that are absorbed by the pores (not shown) of the bottom layer 140 and inhabit the inner bottom of the packaging container B can also be sterilized.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention may be made by those skilled in the art within the above technical scope.

For example, in the embodiment of the present invention, the bottom layer is configured to have a felt shape by arranging fibers in parallel or in an opposite direction and bonded with a synthetic resin adhesive, but may be molded into the same material and shape as the film layer, if necessary. will be.

That is, the bottom layer may be formed as a thin film made of polyethylene or polypropene, and a plurality of pores may be perforated so that the gravy juice may flow into the absorbent layer on the bottom surface of the packaging container.

As described in detail above, the silver nano absorption pad according to the present invention was configured to contain silver nano particles in a film layer in contact with food, so that bacterial propagation can be suppressed.

Therefore, there is an advantage that the freshness of the food for a long time due to the antimicrobial action of the silver nanoparticles.

In addition, since the freshness of the food is maintained for a long time, the odor generated during food decay is prevented in advance, which is preferable in terms of environment and hygiene.

In the silver nano absorbent pad according to the present invention, the absorbent layer for absorbing the liquid spilled from the food was composed of powder pulp and polyacrylic acid.

Therefore, there is an advantage that the water content of the absorbent layer is increased to prevent the outflow of absorbed water.

Claims (7)

Forming a top surface and contacting the food F to guide moisture generated from the food F to the lower side, wherein the film layer 120 contains 20 to 500 PPMW (parts per million by weight) of silver nanoparticles; Forming an outer surface to support the film layer 120 by contacting the inner bottom surface of the packaging container (B) in which the food (F) is stored, and formed into a non-woven fabric not subjected to a woven process to form pores therein. A bottom layer 140 accommodating and absorbing moisture in the pores; And an absorbent layer 160 positioned between the film layer 120 and the bottom layer 140 to absorb moisture guided to the lower side of the film layer 120. The silver nano absorbent pad, characterized in that the film layer 120, the bottom layer 140 and the absorber layer 160 is formed by heat fusion integrally. Forming a top surface and contacting the food F to guide moisture generated from the food F to the lower side, wherein the film layer 120 contains 20 to 500 PPMW (parts per million by weight) of silver nanoparticles; If molded by the same material as the film layer 120 to form an appearance, and in contact with the inner bottom surface of the packaging container (B) in which the food (F) is stored to support the film layer 120, therein Pores are formed and the bottom layer 140 to receive and absorb moisture; And an absorbent layer 160 positioned between the film layer 120 and the bottom layer 140 to absorb moisture guided to the lower side of the film layer 120. The silver nano absorbent pad, characterized in that the film layer 120, the bottom layer 140 and the absorber layer 160 is formed by heat fusion integrally. The silver nano absorbent pad of claim 1 or 2, wherein the film layer (120) is made of polyethylene or polypropylene. The method of claim 1 or claim 2, wherein the entire surface of the film layer 120 is characterized in that a plurality of pores 122, guiding the downward flow of moisture generated from the food (F) is formed Silver nano absorption pad. The silver nano absorbing pad of claim 1, wherein the bottom layer is formed of one of polyester (PET), polypropylene (PP), and polyethylene (PE). The silver nano absorbent pad of claim 2, wherein the bottom layer is formed of polyethylene or polypropylene.  The method of claim 1 or 2, wherein the absorbing layer 160, Powdered pulp formed by processing plant fibers, Silver nano absorbent pad, characterized in that it comprises a polyacrylic acid absorbing the water in a stirred state with the powdered pulp.

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