KR200390396Y1 - Food package film emitting far infrared ray - Google Patents

Abstract

The present invention relates to a food packaging composite film comprising a ceramic powder composition that emits far infrared rays. Food packaging composite film according to the present invention is characterized in that it comprises a mixed material layer consisting of a mixed material including a ceramic powder composition and an adhesive of a predetermined composition. The food packaging composite film according to the present invention does not reduce the far-infrared radiation ability of the ceramic powder composition, and the mixed material layer in the composite film maintains transparency suitable for food packaging use.

Description

Food package film emitting far infrared ray

The present invention relates to a food packaging composite film comprising a ceramic powder composition that emits far infrared rays.

Far infrared rays mean long wavelengths among infrared rays. In general, since light has a short wavelength and reflects well, and a long wavelength has a property of being absorbed well when reaching an object, far infrared rays have a strong penetrability in vivo. When exposed to far infrared rays, heat is transmitted to the human body due to its strong penetrating power. This thermal action helps to eliminate bacteria that cause various diseases, and expands capillaries to help blood circulation and tissue formation. In addition, by touching the water and protein molecules that make up the cells, the cells are shaken finely 2,000 times per minute to activate cell tissue, which is effective in preventing various adult diseases such as aging, promoting metabolism, and chronic fatigue. It is known to have effects such as acceleration, pain relief, heavy metal removal, sleep, deodorization, antibacterial, mold growth prevention, dehumidification, and air purification.

Ceramics have been studied as one of such beneficial far-infrared radiators, and housing and building materials, kitchen appliances, textiles, clothing, bedding, medical appliances, and jjimjilbangs have been widely used.

However, ceramic compositions optimized for applying far-infrared radiation ceramics to food packaging films and methods of incorporating the compositions into packaging films have not been widely known, and when the technology for realizing them is developed, a significant advance in food preservation will be made. It is expected.

However, as disclosed in Patent Registration No. 10-025511, the freshness-retaining antimicrobial ceramic composition disclosed in the Republic of Korea Patent Publication and a method for manufacturing the same, the ceramic composition is prepared in a predetermined ratio, the manufacturing method thereof, but the ceramic composition The composition of the included composite film for food packaging is not disclosed at all.

The present invention is devised to solve the above problems, the present invention is to provide a food packaging film containing a ceramic composition.

Specifically, a mixed material layer including a ceramic composition between films is formed to be transparent, and provides a ceramic composition having a high far-infrared emissivity, which is advantageous for food preservation, even between films.

Far-infrared radiation ceramic powder composition according to the present invention is 15% to 25% by weight of aluminum oxide, 40% to 57% by weight of silicon oxide, 8% to 15% by weight of magnesium oxide, 5% to 15% by weight of sodium oxide, 10 wt% to 15 wt% of calcium oxide, 5 wt% to 7 wt% of titanium oxide, wherein the sum of the respective components is 100 wt%.

When the ceramic composition is contained in the food packaging composite film, it is easy to be pulverized while preventing the decrease in transparency as much as possible, and the transparent color which the present invention is intended to achieve outside the above range with a specific composition for realizing emissivity and radiation energy for food storage. It is because it is difficult to realize the implementation and emissivity and the radiation energy, and it is not preferable in terms of manufacturing cost.

At this time, the particle diameter of the ceramic powder is preferably 350 to 400 mesh, since the adhesion with the film is not easy when the mesh size is 350 mesh or less, and the meaning of the additional process is insignificant in view of the effect that is expressed when the mesh size is 400 mesh or more.

In the case of a food packaging composite film, it appears aesthetically unclean when the color enters, and even though the ceramic composition is included, the transparency of the layer formed by the ceramic composition is maintained. Although the ceramic composition according to the present invention is applied to the transparent film, the transparent film to which the ceramic composition is applied maintains the level of transparency at which the package inside is clearly visible.

According to the present invention, the ceramic powder composition is adhesively laminated with the films using a dry lamination process to bond the ceramic powder composition to the film. The dry lamination process used is available in both solvent and cost formulations.

In the solvent-type dry lamination process, the ceramic powders are mixed with an adhesive, a curing agent, and a dissolving agent having a predetermined viscosity, and are bonded and laminated through a pressure roller while being applied between layers of films having a thickness of 6 μm to 200 μm. At this time, 4% to 20% by weight of ceramic powder, 38% to 45% by weight of adhesive, 3% to 10% by weight of curing agent, 35% to 55% by weight of solvent (100% by weight of the components) It is preferred that a mixed material consisting of the film be applied between the films. If the ceramic powder is more than 20% by weight, the process conditions are unstable, and if it is less than 4%, the far-infrared emissivity is reduced. In addition, when the adhesive is less than 38% by weight, the adhesive force decreases due to the ceramic powder, and when the adhesive is more than 45% by weight, the cost increases. In addition, the range of a hardening | curing agent and a dissolving agent changes with the usage-amount of an adhesive agent and a ceramic powder, and is a fixed range.

1 is a process schematic diagram of bonding ceramic powder to a film in a solvent type dry lamination process. According to this, as the first film 12 wound on the first film unwinder 11 is released, an adhesive, a curing agent, Solvent and The ceramic powder is passed through the pressure roller 13 for supplying the mixed material mixed with the ceramic powder, and then passed through the dry chamber 15 to bond the ceramic powder to the first film 12. Thereafter, to the heating roller 17 to which the second film 18 is supplied. As the first film 12 passes again, a composite film having a ceramic layer between the first film 12 and the second film 18 is manufactured.

On the other hand, in the case of the non-formal dry lamination process, it is preferable that a mixed material composed of 4 wt% to 20 wt% of ceramic powder and 80 wt% to 96 wt% of the adhesive (the sum of the components is 100 wt%) is applied. If the ceramic powder is 20 wt% or more, the process conditions are unstable, and if it is 4 wt% or less, the far-infrared emissivity decreases. The range of adhesives is relative to the range of ceramic powder.

2 is a process schematic diagram of bonding the ceramic powder to the film in a non-molded dry lamination process. According to this, the first film 12 wound on the first film unwinder 11 is released and the adhesive and The ceramic powder is adhered to the film by passing through the pressure roller 13 to which the mixed ceramic powder is supplied. Thereafter, to the heating roller 17 to which the second film 18 is supplied. As the first film 12 passes again, a composite film having a ceramic layer between the first film 12 and the second film 18 is manufactured.

The mixed material mixed with ceramic powder and adhesive is applied to the film, and the applied film is re-bonded with other films in various ways to form a composite film. Usually, two, three, four or more films are composited. In some cases, seven or eight films may be combined. In the description of the present invention will be described for a composite film of a composite of 2 to 4 films, but is not limited thereto. On the other hand, the description of the material and use of the composite film is well known to those skilled in the art, and the detailed description thereof will be omitted since it may obscure the subject matter of the present invention.

3A, 4A and 5A show perspective views of embodiments of the composite film, and FIGS. 3B, 4B and 5B show the radial directions of far infrared rays in the embodiments according to FIGS. 3A, 4A and 5A, respectively. have.

According to the embodiment of FIGS. 3A and 3B, the mixed material is applied between the first film 30 and the second film 40, and between the mixed material layer 31 and the first film 30 formed of the mixed material. The ink layer 33 is formed in this. The first film 30 is a layer used for the purpose of forming the ink layer 33, OPP, PET, NY, PT, Al foil, paper, etc. are usually used, the second film 40 serves as a sealing material As a layer for the CPP, VM-CPP, milky CPP, CPR, LLDPE, milky LLDPE, FPP, milky OPP, nonwoven fabric and the like are used. In the composite film of this embodiment, far-infrared rays emitted from the ceramic powder in the mixed material layer 31 may be radiated in both directions of the composite film along the arrow direction of FIG. 3A. However, when the first film 30 is an aluminum foil, it may be radiated only in the direction of the second film 40.

According to the embodiment of FIGS. 4A and 4B, the mixed material is applied between the second film 60 and the third film 70, the other side of which the second film 60 does not adhere to the mixed material layer 61. The adhesive layer 51, the ink layer 53, and the 1st film 50 are formed in this order. The first film 50 is a layer used for forming the ink layer 53. OPP, PET, NY, PT, Al foil, paper, etc. are generally used, and the second film 60 is made of far infrared rays. As a layer for blocking radiation, aluminum foil is used, and the third film 70 is usually a polyethylene, CPP, VM-CPP, milky CPP, CPR, LLDPE, milky LLDPE, FPP, milky OPP as a layer for sealing material. , Nonwoven fabrics are used. In the composite film of the present embodiment, as shown in FIG. 4B, the far-infrared rays emitted from the ceramic powder in the mixed material layer 61 do not pass through the second film made of aluminum foil, and thus, only in the direction in which the third film 70 is located. Far infrared rays can be emitted. Therefore, more far infrared rays may be emitted to the internal storage.

According to the embodiment of FIGS. 5A and 5B, the mixed material is applied between the third film 100 and the fourth film 110, and the other surface on which the third film 100 does not adhere to the mixed material layer 101. The adhesion layer 91, the 2nd film 90, the adhesion layer 81, the ink layer 82, and the 1st film 80 are formed in this order. The first film 80 is a layer used for forming the ink layer 82, and OPP, PET, NY, PT, Al foil, paper, etc. are generally used, and the second film 90 is heat resistant As a film for improving or maintaining vacuum properties, CPP, VM-CPP, milky CPP, CPR, LLDPE, milky LLDPE, FPP, milky OPP, nonwoven fabric, etc. are generally used, and the third film 100 is a film for blocking far infrared rays. Usually, aluminum foil etc. are used. In addition, the fourth film 110 may be a polyethylene, CPP, VM-CPP, milky CPP, CPR, LLDPE, milky LLDPE, FPP, milky OPP, nonwoven fabric and the like as a layer for sealing material. In the composite film of the present embodiment, since far infrared rays emitted from the ceramic powder in the mixed material layer do not pass through the third film made of aluminum foil, far infrared rays may be emitted only in the direction in which the fourth film 70 is located. Therefore, more far infrared rays may be emitted to the internal storage.

Example 1 Preparation of Ceramic Powder

① The ceramic is crushed to a diameter of 380 mesh, and then 25% by weight of aluminum oxide, 50% by weight of silicon oxide, 8% by weight of magnesium oxide, 5% by weight of sodium oxide, 15% by weight of calcium oxide, and 7% by weight of titanium oxide. Mixing to prepare a ceramic powder (Sample 1). At this time, the far-infrared emissivity of the manufactured ceramic powder was 92.4%, and the radiation energy was 3.56 × 10 ⁸ (W / m ² μm).

② The ceramic is pulverized to a diameter of 380 mesh, and then 15% by weight of aluminum oxide, 40% by weight of silicon oxide, 15% by weight of magnesium oxide, 5% by weight of sodium oxide, 15% by weight of calcium oxide, and 5% by weight of titanium oxide. Mixing to prepare a ceramic powder (Sample 2). At this time, the far-infrared emissivity of the manufactured ceramic powder is 91.3%, and the radiant energy is 3.52 × 10 ⁸ (W / m ² μm).

Example 2 Ceramic Powder Adhesion through Solvent Dry Lamination.

Copper plate 175 mesh depth 25㎛ laser plate, press roller hardness 70 °, double knife angle 45 °, adhesive viscosity 4000CPP / 25 ° C, dry chamber temperature A-zone 85 ° C, B-zone 90 ° C, C-zone 95 ° C, Heating roller temperature 60 ℃, working speed 90m / min, aging room temperature 40 ℃, ① 1% by weight of ceramic powder, 40% by weight of adhesive, 4% by weight of curing agent, 55% by weight of solvent ② 5% by weight of ceramic powder (sample 1) , 40% by weight of adhesive, 4% by weight of curing agent, 51% by weight of solvent ③ 10% by weight of ceramic powder, 40% by weight of adhesive, 4% by weight of curing agent, 46% by weight of solvent ④ 20% by weight of ceramic powder, 40% by weight of adhesive, 4 The ceramic powder was adhered to the film by a solvent type dry lamination process with weight% and 36 weight% of a solvent. At this time, when the ceramic powder 5% by weight, adhesive 40% by weight, curing agent 4% by weight, 51% by weight of the solvent was used, the optimum far-infrared emissivity and radiation energy were obtained, but in all cases, the far-infrared emissivity of the general composite film 83.4% (5 ~ 20㎛), 87.6% of emissivity (5 ~ 20㎛) better than 3.21 × 10 ² (W / m ² ㎛) of radiation energy, 3.38 × 10 ² (W / m ² ㎛) of radiation energy (37 ℃ test, measurement results of black body using FT-IR Spectrometer, Korea Infrared Ray Evaluation Institute)

Example 3 Ceramic Powder Adhesion through a Non-Form Dry Lamination Process.

Press roller hardness 70 °, adhesive viscosity 4000CPP / 25 ℃, heating roller temperature 60 ℃, working speed 90m / min, normal temperature natural curing, ① ceramic powder (sample 2) 1% by weight, adhesive 99% by weight ② ceramic powder ( Sample 2) 5 wt%, adhesive 95 wt% ③ Ceramic powder (sample 2) 10 wt%, adhesive 90 wt% ④ Ceramic powder (sample 2) 20 wt%, adhesive 80 wt% The powder was adhered to the film, in which case the far-infrared emissivity (5-20 μm) was 87.6% and the radiation energy was 3.38 × 10 ² (W / m ² μm). (37 ° C. test, FT- Measurement results of black body using IR Spectrometer, Korea Infrared Ray Evaluation Institute

On the other hand, Figure 6 is a photograph showing a state of measuring the infrared film image of the far-infrared radiation food packaging composite film and the general food packaging composite film according to the present application (infrared thermal imager at room temperature 20 ℃, humidity 45% conditions Infrared radiation energy image emitted from the measurement object). According to this, it can be seen that in the food packaging composite film according to the present disclosure, infrared radiation energy is emitted in a greater amount than the general food packaging composite film.

Next, by packaging the food with a food packaging composite film according to the present invention to measure the change of state over time, summarized in Table 1. Table 1 shows the state change of the composite film according to the present invention when stored at room temperature, banana, tangerine, respectively.

24 hours 72 hours 120 hours 240 hours 360 hours Lettuce Good Good Good Good Partially discolored banana Good Good Good Good Peel discoloration tangerine Good Good Good Good Small amount of mold

On the other hand, Table 2 is a composite film for general food packaging summarizes the state changes when the lettuce, banana, and tangerine are stored at room temperature.

24 hours 72 hours 120 hours 240 hours 360 hours Lettuce Good Partial discoloration Total corruption - - banana Good Peel discoloration and decay Total corruption Large amount of corruption - tangerine Good Good Mold Development and Decay Large amount of corruption -

Although the subject innovation has been described primarily based on the above embodiments, many other possible modifications and variations can be made without departing from the spirit and scope of the subject innovation. For example, changes in the composition ratio of the composition, addition of additives that do not exert significant effects, other conventional methods and apparatus for bonding and laminating the film, such as the use of extruders, the change of the material of the film, and the like can be easily changed by those skilled in the art. It will be enough.

The ceramic powder composition according to the present invention has an effect of emitting far-infrared (wavelength) emissivity and radiation energy suitable as a food wrapping paper.

The food packaging composite film prepared according to the present invention not only has a certain transparency due to the specific ceramic powder composition ratio, but also shows an excellent effect for storing food.

In addition, the manufacturing method for food packaging according to the present invention has the effect of producing a composite film without reducing the performance of the ceramic powder composition.

The scope of the above invention is defined in the following claims, and is not bound by the description in the text of the specification, all modifications and variations belonging to the equivalent scope of the claims will fall within the scope of the present invention.

1 is a process schematic diagram of bonding a ceramic powder to a film by a solvent type dry lamination process,

2 is a process schematic diagram of bonding the ceramic powder to the film in a non-molded dry lamination process,

Figure 3a is a perspective view showing an embodiment of a composite film,

3B is a perspective view illustrating a radial direction of far infrared rays according to the embodiment of FIG. 3A;

Figure 4a is a perspective view showing another embodiment of the composite film,

4B is a perspective view illustrating a radial direction of far infrared rays according to the embodiment of FIG. 4A;

Figure 5a is a perspective view showing another embodiment of the composite film,

5B is a perspective view illustrating a radial direction of far infrared rays according to the embodiment of FIG. 5A;

Figure 6a is a photograph of the infrared film image of the far infrared radiation food packaging composite film according to the present application,

Figure 6b is a picture taken the infrared film image of the conventional food packaging composite film.

<Description of the symbols for the main parts of the drawings>

11: unwind 12: the first film

13: pressure roller 15: dry chamber

17: heating roller 18: second film

30, 40, 50, 60, 70, 80, 90, 100, 110: film

31, 61, 101: mixed material layer

Claims (10)

In the food packaging composite film is formed by bonding at least two or more films, 15 to 25 weight percent aluminum oxide, 40 to 57 weight percent silicon oxide, 8 to 15 weight percent magnesium oxide, 5 to 15 weight percent sodium oxide, 10 to 15 weight percent calcium oxide, A mixed material layer containing far-infrared radiation ceramic powder and an adhesive comprising 5 wt% to 7 wt% of titanium oxide (the sum of each component is 100 wt%) is included between the films. Far infrared radiation food packaging composite film. The method according to claim 1, The composite film includes a first film 30 for printing and a second film 40 adjacent to the first film, and the mixed material layer 31 includes the first film 30 and the second film. Far-infrared radiation food packaging composite film, characterized in that it is included between the film (40). The method according to claim 2, Far-infrared radiation food packaging composite film, characterized in that the ink layer 33 is formed on the first film (30). The method according to claim 2 or 3, The first film 30 is one selected from the group consisting of OPP, PET, NY, PT, Al foil, paper, and the second film 40 is polyethylene (PE), cast polypropylene (CPP), VM Far-infrared radiation food packaging composite film, characterized in that one selected from the group consisting of-CPP, milky CPP, CPR, LLDPE, milky LLDPE, FPP, milky OPP, non-woven fabric. The method according to claim 1, The composite film includes a first film 50 for printing, a second film 60 for far-infrared cutoff adjacent to the first film 50, and a sealing material use adjacent to the second film 60. Far infrared radiation food packaging composite film, characterized in that composed of three films (70), the mixed material layer (61) is contained between the second film (60) and the third film (70). The method according to claim 5, Far infrared radiation food packaging composite film, characterized in that the ink layer 52 and the adhesive layer 51 are sequentially formed between the first film 50 and the second film (50). The method according to claim 5 or 6, The first film 50 is one selected from the group consisting of OPP, PET, NY, PT, Al foil, paper, The second film 60 is aluminum foil, The third film 70 is far infrared radiation, characterized in that one selected from the group consisting of polyethylene (PE), CPP, VM-CPP, milky CPP, CPR, LLDPE, milky LLDPE, FPP, milky OPP, nonwoven fabric Food packaging composite film. The method according to claim 1, The composite film may block far-infrared rays adjacent to the first film 80 for printing, the second film 90 for strengthening heat resistance adjacent to the first film 80, and the second film 90. The third film 100 for the purpose of use, and the fourth film 110 for the sealing material use adjacent to the third film 100, the mixed material layer 101 is the third film 100 and the agent Far infrared radiation food packaging composite film, characterized in that it is included between the four film (110). The method according to claim 8, An ink layer 82 and an adhesive layer 81 are sequentially formed between the first film 80 and the second film 90, and between the second film 90 and the third film 100. Far infrared radiation food packaging composite film, characterized in that the adhesive layer 100 is formed. The method according to claim 8 or 9, The first film 80 is one selected from the group consisting of OPP, PET, NY, PT, Al foil, paper, The second film 90 is one selected from the group consisting of polyethylene (PE), CPP, VM-CPP, milky CPP, CPR, LLDPE, milky LLDPE, FPP, milky OPP, nonwoven fabric, The third film 100 is aluminum foil, The fourth film 110 is far infrared radiation, characterized in that one selected from the group consisting of polyethylene (PE), CPP, VM-CPP, milky CPP, CPR, LLDPE, milky LLDPE, FPP, milky OPP, nonwoven fabric Food packaging composite film.