KR100706772B1 - Method for manufacturing the same a water absorption sheet having nano-silver - Google Patents

Abstract

The present invention relates to an absorbent paper for absorbing moisture generated during thawing of food, and more particularly, to a silver nano absorbent paper containing silver nano particles to prevent bacterial propagation on the surface of food.

The silver nano absorbent paper 100 according to the present invention is formed of a hydrophobic material to form an upper surface appearance, and is in contact with the food F to guide the moisture generated from the food F to the lower side. 120 and, after being molded of the same material as the upper sheet 120, hydrophilic treatment to have a hydrophilic property (laminating) on the lower side of the upper sheet 120 is laminated to the upper sheet 120 ) Has a configuration including a lower absorption layer 140 to absorb the water guided to the lower side, the upper sheet 120 and the lower absorption layer 140 contains 20 to 500 PPMW (parts per million by weight) silver nanoparticles . And the upper sheet 120 and the lower absorbing layer 140 is characterized in that it is molded of polypropylene or polyethylene. 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, absorbent paper, sterilization, freshness

Description

Silver nano absorbent paper and its manufacturing method {Method for manufacturing the same a water absorption sheet having nano-silver}

1 is a longitudinal sectional view showing the configuration of a blotter paper according to the prior art;

Figure 2 is a longitudinal sectional view showing the internal configuration of the silver nano absorbent paper according to the present invention.

Figure 3 is a data showing the sterilization test results of the lower absorbent layer constituting the main portion of the silver nano absorbent paper according to the present invention.

Figure 4 is a longitudinal sectional view schematically showing a state in which the silver nano-absorbent paper installed in the packaging container according to the present invention.

5 is a manufacturing process diagram schematically showing a silver nano absorbent paper manufacturing method according to the present invention.

Explanation of symbols on the main parts of the drawings

100. Silver Nano Absorber 120. Top Sheet

122. Pores 140. Lower Absorption Layer

 B. Packing Container F. food

S100. Resin stirring step S200. Hydrofatty stage

S300. Fiber cooling step S400. Nonwoven Forming Step

S500. Embossing step S600. Nonwoven Hydrophilic Step

S700. Nonwoven Lamination Stage

The present invention relates to an absorbent paper for absorbing juicy juice generated during thawing of food, and more specifically, to silver nano absorbent paper having 20 to 500 PPMW (parts per million by weight) of silver nanoparticles in the absorbent paper. It is about.

In general, foods such as meat, fish, vegetables, and fruits are thawed, or when their cells are destroyed, the fluid inside and outside the cells flows out, which is not aesthetically pleasing, and creates an environment in which bacteria on the meat surface can grow. Will be provided.

In addition, when the freshness of the food is reduced, the water retention capacity of the food is lowered, so that more water flows out of the food, and the food is further accelerated in autolysis, bacterial growth and decay.

Therefore, in order to maintain the freshness of the food must absorb the moisture generated from the food, there are a variety of methods for absorbing such moisture.

For example, when water or paper is used to absorb moisture from food, it may seem that food and water are separated from each other, but it is difficult to maintain the freshness of food because they are in contact with each other.

Recently, various absorbent papers have been proposed and widely used to maintain the state of absorbing the fluid from the food.

As a specific conventional absorbent paper, as shown in FIG. 1, in Korean Registered Application No. 20-0376555, the nonwoven fabric 10 located at the lower side for absorbing moisture and the nonwoven fabric 10 positioned above the nonwoven fabric 10 are absorbed. It is proposed that the absorbent paper 1 including a white ope film 20 for preventing the fluid from flowing upward and a polyethylene layer 30 for adhering the nonwoven fabric 10 and the white ope film 20 to each other. Doing.

The white OPEC film 20 has excellent surface gloss, has a pure white color, gives a beautiful and luxurious feeling, and is used for packaging because it has a light and flexible feature.

In addition, a plurality of absorption holes 40 are formed in the white OP film 20. The absorption hole 40 is formed using a separate punching device (not shown), and the water flowing from the food seated on the upper surface of the white OP film 20 flows to the nonwoven fabric 10. Do this.

Therefore, the depth of the absorption hole 40 is the thickness of the polyethylene layer 30 and the white opac film 20 so that the water flowing from the food can flow smoothly to the nonwoven fabric through the polyethylene layer 30 Is formed deeper.

However, the absorbent paper 1 for the registration room constructed as described above has the following problems.

That is, the white opac film 20 which forms the upper surface of the absorbent paper 1 and comes into contact with food is not absorbed at all except the absorbing hole 40.

Therefore, the absorption hole 40 is absorbed only when a large amount of water flows from the food, there is a problem that the water removal efficiency of the absorbent paper 1 is lowered.

In addition, when a small amount of moisture is drawn from the food while the food is seated on the top surface of the white OP film 20, the surface of the white OP film 20 and the food is in contact with the food and the bacteria are multiplied. This is not desirable because it becomes active.

In addition, the absorbent paper 1 does not include any configuration for antibacterial and sterilizing bacteria.

Accordingly, when a large amount of water is generated, bacterial propagation is rapidly increased on the contact surface between the upper surface of the absorbent paper 1 and the food, and the decay of the food is accelerated.

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

Another object of the present invention is to provide a silver nano absorbent paper which is also absorbed by containing 20 to 500 PPMW of silver nanoparticles in the lower absorbent layer that absorbs the water spilled from the food, thereby regulating bacterial propagation in standing water.

The silver nano absorbent paper according to the present invention for achieving the above object is formed of a hydrophobic material to form an upper appearance, and the upper sheet to guide the moisture generated from the food to the lower side in contact with the food; And a lower absorbent layer formed of the same material as the upper sheet and then hydrophilized to have hydrophilicity, and laminated to the lower side of the upper sheet to absorb moisture guided to the lower side of the upper sheet. The upper sheet and the lower absorbing layer is characterized in that the silver nanoparticles contained 20 to 500 parts per million by weight (PPMW).

The upper sheet and the lower absorbent layer is characterized in that it is molded of polypropylene or polyethylene.

A resin stirring step of stirring a polypropylene masterbatch containing 1000 PPMW to 5000 PPMW with a polypropylene resin; and a water fat sanding step of melting and spinning the polypropylene masterbatch and polypropylene resin stirred in the stirring step; A fiber cooling step of cooling air by injecting air into the microfibers spun by the water fat spinning step, a nonwoven fabric forming step of forming the microfibers solidified by the fiber cooling step into a non-woven fabric having a thin thickness, and the nonwoven fabric forming step An embossing step of forming a top sheet by removing lint from the surface of the nonwoven fabric formed by the step; and a nonwoven hydrophilic step of allowing the top sheet from which the lint of the surface is removed by the embossing step to be contained in a hydrophilic agent to form a lower absorbent layer; Laminated bonding by laminating the upper sheet and the lower absorbent layer Characterized in that it comprises a nonwoven lamination step.

The hydrospinning step is characterized in that it is carried out by the melt-blown (Melt-blown) method.

The hydrothermal step is characterized in that it is carried out by the air-lay (Air-lay) method.

The hydrospinning step is characterized in that it is carried out by a bonding (Bonding) method.

The hydrospinning step is characterized in that it is carried out by a spunbond method.

According to the present invention having such a configuration, there is an advantage that the freshness of the food lasts for a long time due to the antibacterial action of the silver nanoparticles.

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

Figure 2 is a longitudinal cross-sectional view showing the internal configuration of the silver nano absorbent paper according to the present invention, Figure 3 shows the data showing the sterilization test results of the lower absorbent layer constituting the main portion of the absorbent package according to the present invention, Figure 4 is a longitudinal sectional view schematically showing a state in which the silver nano absorbent paper according to the present invention is installed in a packaging container.

As shown in these figures, the silver nano-absorbent paper 100 according to the present invention is composed of two layers, and the two layers are thermally fused to each other while passing through a pair of thermal fusion rollers (not shown). By attaching, they are integrated without being separated.

That is, the silver nano-absorbent paper 100 forms an upper appearance and is heat-fused to the upper sheet 120 and the lower side of the upper sheet 120 to be seated in contact with the food (F in FIG. 4). It is configured to include a lower absorption layer 140 for absorbing moisture generated from the food (F).

 The upper sheet 120 is formed of a hydrophobic polyethylene or polypropene as a thin film, and is in direct contact with the food F to support the load. And, the top sheet 120 is configured to guide the moisture generated from the food (F) seated on the upper side.

That is, a plurality of pores 122 are formed in the entire surface of the upper sheet 120 so that the interior thereof communicates with the upper and lower sides of the upper sheet 120. Therefore, the moisture generated from the food (F) placed on the upper surface of the upper sheet 120 is allowed to flow downward through the pores 122, the lower absorption layer 140 is to absorb the moisture.

The top sheet 120 contains silver nanoparticles (not shown) constituting the main part of the present invention. The silver nanoparticles are contained in the top sheet 120 at 20 to 500 parts per million by weight (PPMW) to sterilize the germs of food F in contact with the top surface of the top sheet 120. )

That is, as shown in Figure 3, using the silver nano-absorbent paper 100 containing 105PPMW of the silver nanoparticles as a test piece, by applying the staphylococcus aureus and E. coli as a test bacterium, the sterilization test was performed, the initial case of staphylococcus Inoculation of 1.5 × 10 ⁵ (CFU / ml) showed a bacteriostatic reduction of 99.9% after 4 hours.

In addition, the silver nanoparticles generate sterilization ability when the content is 20 PPMW, and when the content of the silver nanoparticles is 500 PPMW or more, the sterilization ability with the increase of the content gradually decreases, thereby reducing the economic efficiency of the silver nano absorbent paper 100, and thus the content of the silver nanoparticles. Is preferably applied at 20 to 500 parts per million by weight (PPMW).

On the other hand, the lower absorption layer 140 forms the bottom surface of the silver nano absorbent paper 100, and has an absorption function for receiving moisture therein. Accordingly, when the silver nano absorbent paper 100 is in contact with the inner bottom surface of the packaging container B while the silver nano absorbent paper 100 is seated on the bottom surface of the packaging container (B in FIG. 4), the lower absorption layer 140 may be It is possible to absorb the moisture accumulated in the bottom surface of the packaging container (B).

The lower absorbent layer 140 is formed by selecting one of polypropylene and polyethylene. More specifically, the fibers are not woven, but are arranged in parallel or in an opposite direction, and then bonded to each other, and are formed of the same material as the upper sheet 120.

That is, the lower absorption layer 140 may contain 20 to 500 PPMW (parts per million by weight) of silver nanoparticles. Therefore, the lower absorbent layer 140 may also function to inhibit bacterial growth on the surface of the food (F) like the upper sheet 120.

In addition, the lower absorption layer 140 is hydrophilized to have hydrophilicity. That is, the lower end absorbing layer 140 is dehydrated in polyoxyethylene (POE; Polyoxyethylene) in which the end group is a hydroxyl group (-OH), and the hydrophilicity is obtained by drying. Since the hydrophilic treatment is generally a widely used technique, a detailed description thereof will be omitted.

By the hydrophilic treatment, the lower absorbent layer 140 flows out of the food product F and is capable of absorbing the water flowing downward through the pores 122.

Hereinafter, a manufacturing method of the silver nano absorbent paper 100 according to the present invention having the above configuration will be described with reference to the accompanying drawings.

5 is a manufacturing process diagram schematically showing a silver nano absorbent paper manufacturing method according to the present invention.

As shown in the figure, in order to manufacture the silver nano absorbent paper 100, first, a polypropylene masterbatch containing 1000 PPMW to 5000 PPMW silver is stirred with a polypropylene resin. (Resin stirring step: S100)

Then, the polypropylene master batch and the polypropylene resin stirred by the resin stirring step (S100) are melted and spun at high pressure.

At this time, in the hydrodialysis step (S200) is carried out by various methods. That is, one of the melt-blown method, the air-lay method, the bonding method, and the spunbond method are performed.

To briefly describe the various methods described above, the melt-blown method is performed by blowing a high temperature and high pressure air into the molding machine when the molten resin is extruded from the molding machine (not shown), such high temperature and high pressure The resin in the same state as the yarn extruded by the air is collected on a belt (not shown) or an iron plate (not shown) driven by cold wind to form a fiber state.

And, the air-lay (Air-lay) method is to disperse the resin in the same state as the yarn extruded from the molding machine (not shown) in the air to spread on the iron plate to make a fiber state.

The bonding method is the most widely used, and the fiber state is made by immersing the resin in the same state as the yarn extruded from the molding machine in an emulsion type adhesive solution.

Finally, the spunbond method is equipped with a spinneret (not shown) formed with a plurality of micropores such as a shower nozzle to one side of the molding machine and extruded to form a large amount of resin. It is collected on a belt to make a fiber state.

Resin made into a fiber state by adopting one of the various methods described above is soft because it contains high temperature. Therefore, it is cooled by blowing air to the resin in the soft state. (Fiber cooling step: S300)

After this process, the solidified fine fibers are formed into a nonwoven fabric having a thin thickness. (Non-woven fabric forming step: S400)

When the nonwoven fabric forming step (S400) is completed, the top sheet 120 containing the silver nanoparticles is completed. When the top sheet 120 is completed, a large amount of lint is formed on the surface, and the embossing step S500 is performed to remove such lint.

The lint is removed by the embossing step (S500) to form the lower absorbent layer 140 by using the upper sheet 120 having a polished surface. In other words, by selecting the required amount of the lower absorbent layer 140 to be made from the upper sheet 120 made through the embossing step (S500) and soaked in a hydrophilic agent is molded to be a lower absorbent layer 140 having absorbency. Hydrophilicity step: S600)
Therefore, when the upper sheet 120 is subjected to the nonwoven hydrophilic step (S600), the lower absorbent layer (S140) becomes the upper sheet (S120) when only the embossing step (S500) is completed without passing through the nonwoven hydrophilic step (S600). do.
Then, it will be preferable to apply only one half of the number of the top sheet 120 made through the embossing step (S500) to the nonwoven hydrophilic step (S600).

By the above steps, the upper sheet 120 and the lower absorbent layer 140 are respectively molded, and the upper sheet 120 and the lower absorbent layer 140 are thermally laminated by laminating and bonding to the present invention. Silver nano absorbent paper 100 by the manufacturing method of silver nano absorbent paper is completed. (Non-woven fabric laminating step: S700)

Hereinafter, a process of absorbing the water flowing out of the food F using the silver nano absorbent paper 100 made by the manufacturing method as described above will be described with reference to FIG. 4.

First, the food (F) is placed on the upper surface of the silver nano absorbent paper 100 in a state where the silver nano absorbent paper 100 is seated on the inner bottom surface of the packaging container (B). In this case, the top sheet 120 is located on the silver nano absorbent paper 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 paper 100 generates moisture in the process of thawing, and the moisture flows downward to contact the upper sheet 120.

The moisture reaching the upper sheet 120 is guided by a plurality of pores 122 formed in the upper sheet 120 and flows to the lower side of the upper sheet 120, that is, the lower absorption layer 140.

In this case, bacteria are sterilized by the silver nanoparticles contained in the upper sheet 120 at the portion where the food F and the upper sheet 120 contact, and the silver nano absorbent paper 100 is disposed on the bottom surface of the packaging container B. Even if there is moisture that can not be removed before the seating) is absorbed by the lower absorbing layer 140 it is also possible to sterilize the bacteria inhabiting the inner bottom of the packaging container (B).

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 hydrophobic resin forming the upper sheet and the lower absorbent layer is made of polypropylene, but may be molded from polyethylene having the same hydrophobicity as that of polypropylene. Of course.

As described in detail above, the silver nano absorbent paper according to the present invention was configured to contain silver nano particles in the upper sheet and the lower absorbent layer 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.

Claims (7)

An upper sheet 120 formed of a hydrophobic material to form an upper surface appearance and contacting the food F to guide the moisture generated from the food F to the lower side; It is formed of the same material as the top sheet 120 and then hydrophilic (처리 水性) to have a hydrophilic (親水 性), and laminated on the lower side of the upper sheet (Laminating) to guide the moisture guided to the lower side of the upper sheet 120 Has a configuration including a lower absorbing layer 140 to absorb, Silver nano absorbent paper, characterized in that the upper sheet 120 and the lower absorption layer 140 contains 20 to 500 PPMW (parts per million by weight) of silver nanoparticles. The silver nano absorbent paper according to claim 1, wherein the upper sheet (120) and the lower absorbent layer (140) are formed of polypropylene or polyethylene. A resin stirring step (S100) of stirring a polypropylene masterbatch containing 1000 PPMW to 5000 PPMW with polypropylene resin, A water fat spinning step (S200) of melting and spinning the polypropylene masterbatch and polypropylene resin stirred in the stirring step; A fiber cooling step (S300) for injecting and cooling air into the microfibers (Microfiber) spun by the water-fat spinning step (S200), Non-woven fabric forming step (S400) of molding the fine fibers solidified by the fiber cooling step (S300) into a non-woven fabric of a thin thickness, and Embossing step (S500) for forming the upper sheet 120 by removing the lint on the surface of the nonwoven fabric formed by the nonwoven fabric forming step (S400), Non-woven hydrophilic step (S600) so that the upper sheet 120, the lint of the surface is removed by the embossing step (S500) is contained in a hydrophilic agent to be the lower absorbent layer 140, The nano-nano absorbent paper manufacturing method characterized in that it comprises a non-woven laminating step (S700) by laminating the laminate of the upper sheet (120) and the lower absorbent layer (Laminating). 4. The method of claim 3, wherein the water fat dead step (S200) is performed by a melt-blown method. 4. The method of claim 3, wherein the water fat dead step (S200) is performed by an air-lay method. 4. The method of claim 3, wherein the hydrospinning step (S200) is performed by a bonding method.  [4] The method of claim 3, wherein the hydrospinning step (S200) is performed by a spunbond method.

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