KR100314899B1 - Exhaust packing sheet or contianer for fresh food packing - Google Patents

Abstract

PURPOSE: A vent packing sheet and a container for packing fresh food are provided to keep the high degree of freshness for a long time by preventing the fresh food from contacting with the outside air while continuously venting gas discharged from the food, and to maximize the storage property of the fresh food by emitting far infrared rays and containing anti-microbial action. CONSTITUTION: The vent packing sheet for fresh food is manufactured by adding atoxic inorganic matter and anti-microbial composite in atoxic plastic polymer having a melting point of less than 250deg.C, molding the mixture into a sheet form, and drawing the sheet to have a thickness of 100-2500 micrometers. The manufactured vent packing sheet has an exhaust property of 10-1000 gram per square meter per one day, good far infrared rays emitting property and anti-microbial property.

Description

Exhaust packaging sheets and containers for fresh food packaging {EXHAUST PACKING SHEET OR CONTIANER FOR FRESH FOOD PACKING}

The present invention is to propose an exhaustive packaging sheet and container for fresh food packaging, characterized in that it is possible to reduce the leading degradation in the distribution process of fresh food.

In the present invention, the fresh food includes foods such as kimchi, Korean food, Chinese food, aquaculture, bread, and pizza that are cooked or manufactured with raw food ingredients such as fruits, vegetables, fish and meat.

Fresh food releases gas or evaporated water from living breathing throughout the entire process from the producer or producer to the consumer. When the density of released gas or moisture around fresh food is increased, food decay and fermentation are accelerated, and the freshness of food is drastically reduced. If ambient temperature is higher than fermentation temperature, freshness is more difficult to maintain.

In the case of fermented food kimchi, it is important to maintain the freshness of kimchi by maintaining fermentation gas exhaust, maintaining a given ripening temperature and storage temperature, and blocking contact with outside air in order to taste and maintain the taste of kimchi for a long time. The true taste of kimchi and the long-term storage of ripe kimchi can be found in the winter kimchi capture method that our ancestors have traditionally used. According to the present invention, traditionally, winter kimchi burys poison in late autumn land, soaks kimchi in poison and matures it. Kimchi, which is filled with large kimchi poison in late autumn, ripens while releasing fermentation gas between the cover under the fall temperature suitable for fermentation. It is preserved. However, kimchi is gradually fermented even during low winter temperatures, but it is to prevent fermentation of winter kimchi by releasing fermentation gas (mainly CO ₂ ) continuously between the cover.

On the contrary, in modern urban life, Kimchi can't be used even in winter, soak kimchi in plastic sealed container for four seasons, ripen at room temperature, and store in refrigerator after ripening. As such, refrigerators can replace winter temperatures that slow down the fermentation rate, but a closed plastic container (container) to hold kimchi will promote ripening of kimchi by hindering the release of gas generated while fermenting kimchi continues fermentation. If you leave the cover of Kimchi container inside the refrigerator, it will oxidize and change the freshness and taste of Kimchi. Therefore, in either case, it is not a substitute for traditional kimchi poison.

The method of capturing fresh kimchi as described above will be useful for storing the fresh food of the present invention.

This invention is an exhaustive fresh food packaging material and packaging container having a function of continuously discharging the exhaust gas and moisture of the food to be appropriate for the preservation of the fresh food including kimchi on the basis of the observation cited above. I would like to suggest.

Furthermore, the present invention improves the fermentation taste of kimchi by adding far-infrared radiating material to the packaging material, and provides an exhaustive packaging material and packaging container for fresh food packaging, which can suppress the growth of unnecessary microorganisms and remove the odor by adding the antimicrobial complex material. I would like to.

BACKGROUND ART A technique is known in which an inorganic powder is added to a polymer to form a film and the film is stretched to produce a breathable film.

Exhaust packaging material employed in the present invention is a sheet of 100 ~ 2500㎛ thickness that discharges moisture and gas and does not leak water.

This gas exhaust sheet is formed by adding 10% or more of calcium carbonate to a non-toxic plastic polymer material having a melting point of 250 ° C. or lower, and forming a sheet having a thickness of 100 to 2,500 µm, and stretching the sheet to 1.1: 1 to 6: 1 to exhaust sheet Get In the sheet manufacturing process, pores having a size of 0.1 to 10 µm are formed at the interface between the base plastic polymer and the inorganic calcium carbonate, and the fermentation gas generated in the food is released through the pores, and water is formed by stretching the process. Can not pass through the pores.

The air permeability and the water permeability for discharging the gas and the moisture of the exhaust sheet can be selected by controlling the type of polymer, the content of calcium carbonate, the stretching ratio and the like. For the fresh food packaging of the present invention, an air permeable sheet having a water permeability of 10 to 10,000 g / m 2 · day is used.

In addition, as the inorganic material added to the sheet, non-toxic inorganic materials such as calcium carbonate (CaCO ₃ ) and barium sulfate (BaSO ₄ ) may be used. The inorganic material added to the polymer for producing the exhaust sheet is not only to give the organic sheet exhaust properties, but also to resemble the kimchi poison that emits far infrared rays in terms of materials.

The packaging material of the present invention increases in proportion to the exhaustability as the moisture permeability increases. In the present invention, the exhaust volume of the exhaust sheet is measured moisture permeability and estimated the exhaust amount based on the moisture permeability. As a moisture permeability measurement method, ASTM E-96 (procedure D) was used.

Far infrared rays help to store food in food. Far infrared ray is a wavelength (λ) of 4-2,500 µm electromagnetic waves and is in the infrared region having a wavelength of 0.76-2,500 µm, and a wavelength deeply involved in fermentation is known as organic compound resonance absorption far infrared rays having a wavelength of 4-15 µm. Alumina-based, zirconia-based, and titanium-based ceramics can be used as the far-infrared radiation ceramics for helping to store such fresh foods.

The composition (part by weight) of the alumina far-infrared radiation ceramic powder is as follows.

SiO ₂ 20-60 parts

Al ₂ O ₃ 10-60 parts

Fe ₂ O ₃ 1-7 parts

CaO 1-10 parts

MgO 1-10 parts

K ₂ O, Na ₂ O total amount 5-30 parts

ZrO ₂ , TiO ₂ , MnO ₂ , BaO Total amount 1-15 parts

Composition (parts by weight) of zirconia-based far-infrared radiation ceramics powder is as follows.

SiO ₂ 20-60 parts

ZrO ₂ 15-50 parts

Al ₂ O ₃ 0.5-10 parts

Total amount of K ₂ O, Na ₂ O 5-30 parts

Fe ₂ O _3, CaO, MgO, TiO ₂ , BaO Total amount 1-20 parts

The composition (part by weight) of the titanium far-infrared radiation ceramics powder is as follows.

SiO ₂ 20-60 parts

TiO ₂ 10-45 parts

CaO 1-10 parts

MgO 1-10 parts

Total amount of K ₂ O, Na ₂ O 5-35 parts

Al ₂ O ₃ 0.5-10 parts

K ₂ O, Na ₂ O total amount 5-30 parts

ZrO ₂ , Fe ₂ O _3, TiO ₂ , B ₂ O ₃ , MnO ₂ Total amount 1-15 parts

In the present invention, far infrared radiation-exhaust fresh food packaging material is obtained by adding far-infrared radiation substance powder in 0.1-20% of the input amount of the inorganic material.

The present invention also produces an antimicrobial sheet by adding an antimicrobial substance to the exhaust packaging material, thereby suppressing the growth of decaying microorganisms and eliminating odors during the ripening of fresh foods. It has been used a lot. By using this to substitute the Ag ions on the silicate structure to form a powder by forming a three-dimensional network structure. The silicate structure has a function of molecular sieve that can selectively separate materials according to the size of the regularly arranged pore structure and the pore size, and has ion exchange properties and thermal stability. Its characteristics include ion exchange, constant size channels and voids, adsorption function (deodorization function), stable crystal structure, wide specific surface area (active role-deodorization function), and permeability of cell membranes as an antimicrobial mechanism against microorganisms. Destruction (microbial cell membranes play a role in regulating waste permeation, and when antimicrobial substances damage fat or protein in cell membranes, permeation is destroyed and loss of function), interfering with protein synthesis (antibacterial substances bind protein Providing damage to the bulbs causes protein denaturation to cause loss of function), damage to nucleic acids (damages the ability to transfer genetic information of DNA and RNA, inhibits growth), and far-infrared radiation effects (biorhythms) Good antimicrobial properties.Titanium alkoxides, silica alkoxides, epoxysilanes, methylmethacrylates Inorganic filler urea (-Ti-O-Si-, -Si-O-Si-) is mixed to 10 to 60% (by weight) of the total composition, and the hydrolysis and polymerization reaction are carried out to carry out -Ti-O. -Obtain a coating material composition in which polymethyl methacrylate (organic) is bonded to a reactor (inorganic) of Si-, -Si-O-Si-, and the inorganic filler composition on the coating material is polypropylene (PP), polyethylene (PE) It is used to dry the coating film of 0.05 ~ 20㎛ thickness on the outer surface of polymer pellet for sheet molding.

As described above, the antimicrobial composite material added to the packaging material blocks the metabolism of microorganisms (blocks nutrition and oxygen supply), thus exhibits antibacterial properties, kills deodorant microorganisms, and is known for the high emissivity of the available far infrared rays. The use of spinning ceramic powder can be omitted.

A food packaging container is manufactured using an exhaustable sheet having a water permeability of 10 to 10,000 g / m 2 · day. The manufacture of packaging containers varies according to the packaging unit and use as follows.

A packaging container having a large capacity is attached to and supported by the exhaust packaging sheet of the present invention on the inner wall of the grill box to produce an exhaust food packaging. If there is a cover, it can be applied to the cover. When the exhaust packaging is attached to a container such as a grill box, the high frequency welding, the attachment using an adhesive, or the insert assembly using a sealing material are used.

The low-capacity packaging container is shaped into a shape and size required by a plastic material processing method, such as blow molding in a heated vacuum forming molten state.

<Example 1>

Fresh food storage:

Using a 200 μm thick sheet of Example 2 to form a vacuum vacuum in a covered container, food and vegetables such as kimchi and green pepper were packed and stored in the refrigerator.

<Example 2>

Exhaust Sheet Manufacturing 2:

10% polypropylene, 40% polyethylene, 40% CaCO _{3 and} 10% BaSO ₄ were completely dissolved in a twin screw extruder and mixed before being pelleted.

The exhaust polymer pellets were melted in an extruder to form a 400 μm thick sheet in T-die, and then stretched 2: 1 in the machine direction in one stretching machine to produce a 200 μm thick exhaust sheet.

The moisture permeability of the sheet obtained above was measured by ASTM E-96 (procedure D) and found to be 230 g / m 2 · day.

Exhaust sheet prepared as described above was stored in fresh food as in Example 1.

Example 3

Exhaust sheet manufacturing 2 (when draw ratio is 3: 1):

10% polypropylene, 40% polyethylene, 40% CaCO _{3 and} 10% BaSO ₄ were completely dissolved in a twin screw extruder and mixed before being pelleted.

The pellet raw material was melted in an extruder to form a 450 μm thick sheet in T-die, and then stretched 3: 1 in the machine direction in one stretching machine to produce an exhaustable sheet having a thickness of 150 μm.

The moisture permeability of the sheet obtained above was measured by ASTM E-96 (procedure D) and found to be 420 g / m 2 · day.

Exhaust sheet prepared as described above was stored in fresh food as in Example 1.

Example 4

A high-frequency 500 μm thick exhaust sheet was attached to the inner surface of the box on which the slope was grilled, and the vegetables produced by organic farming were packed at the production site and provided to consumers.

As described above, the present invention prevents freshness by packaging fresh foods, blocking contact with outside air, and maintaining a continuous discharge function of the food release gas. In addition, the present invention packaging sheet releases far-infrared rays and has antibacterial properties to store fresh foods. To provide fresh food packaging materials and packaging containers to maximize.

Claims (4)

Non-toxic plastic polymer with melting point less than 250 ℃ contains non-toxic inorganic material and antimicrobial composite, molded into sheet, stretched to 100 ~ 2,500㎛, moisture permeability of 10 ~ 10,000g / ㎡ · day, far infrared emission and antibacterial Exhaust sheet for fresh food packaging characterized in that it has. Non-toxic plastic polymer with melting point below 250 ℃, containing non-toxic inorganic material, molded into sheet, drawn to 100 ~ 2,500㎛ thickness, and having moisture permeability of 10 ~ 10,000g / ㎡ · day Sheet. Non-toxic plastic polymer with melting point less than 250 ℃ contains non-toxic inorganic material and antimicrobial composite, molded into sheet, stretched to 100 ~ 2,500㎛, moisture permeability of 10 ~ 10,000g / ㎡ · day, far infrared emission and antibacterial Eggplant obtain a sheet, and the sheet obtained in the above process is obtained by supporting the outer container or by molding or processing on a packaging container independently. Non-toxic plastic polymer with melting point below 250 ℃, containing non-toxic inorganic material, molded into sheet, drawn to 100 ~ 2,500㎛ thickness, and having moisture permeability of 10 ~ 10,000g / ㎡ · day An exhaustive packaging container for fresh food packaging, characterized in that the sheet is obtained, and the sheet obtained in the above process is supported by an outer container or obtained by molding or processing onto a packaging container independently.