Film for packaging of fresh or fermentation food, packaging material and container

A technology for fermented food and packaging film, applied in transportation and packaging, product, thin material handling, etc., can solve problems such as odor leakage, film is not optimal, inorganic compounds leak food, etc.

Inactive Publication Date: 2008-11-19
INTERPORE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, when pores are formed in the film by adding inorganic compounds, the added inorganic compounds leak into foods such as figure 2 As shown, since the pores are formed as a structure permeating the membrane, the membrane can allow the leakage of gas and food odors, etc.
Therefore, the film is not preferable in terms of storage and sale of foodstuffs

Method used

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  • Film for packaging of fresh or fermentation food, packaging material and container
  • Film for packaging of fresh or fermentation food, packaging material and container
  • Film for packaging of fresh or fermentation food, packaging material and container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061]Using an inflation molding machine having an outer diameter of a mold of 150 mm, a polypropylene (trademark is UBE-PP-F109K, Ube Industries, Ltd.; melt Flow index = 9 g / 10 min) Inflated film was prepared. The obtained polypropylene film was heated at 145° C. for 30 minutes to obtain a non-stretched film with a crystallinity of 70%.

[0062] The non-stretched film was stretched in liquid nitrogen (-196°C) so that its length was increased by 20% from its original length. Next, the film was heated and cured at 145° C. for 2 minutes while maintaining the tension.

[0063] Thereafter, the film was subjected to 300% thermal stretch processing at 130°C. In addition, the film was heat-cured at 145° C. for 30 minutes to obtain a polypropylene microporous film.

[0064] The average pore diameter, porosity, thickness, air permeability, tensile strength, thermal shrinkage and pore closure temperature of the obtained film were measured, as shown in Table 1.

[0065] Here, the por...

Embodiment 2

[0069] Crystalline polypropylene having a density of 0.92 and a melt flow index of 0.6 g / 10 min was melted and extruded through a 4 inch die with a discharge hole diameter of 0.04 inches. Afterwards, the extruded product was cooled to obtain a non-stretched film.

[0070] The extruded film was stretched 10% at room temperature and then 10% at -20°C. Next, the resulting product was processed by thermal stretching at 140°C. Afterwards, the film was heated and cured at 140° C. for 10 minutes.

[0071] The obtained membrane was tested by the method carried out in Example 1, and various properties shown in Table 1 were obtained.

Embodiment 3

[0073] Crystalline polyethylene with a density of 0.93-0.96 and a melt flow index of 0.5-1.2 g / 10 min was melted and extruded through a 4 inch die with a discharge hole diameter of 0.04 inches.

[0074] The extruded film was subjected to a cold stretching process at 25° C. so that the length of the film was increased by 50% from the original length. Next, the resulting product was processed by thermal stretching at 115°C. Afterwards, the film was heat-cured at 120° C. for 5 min.

[0075] The obtained membrane was tested by the method carried out in Example 1, and various properties shown in Table 1 were obtained.

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Abstract

A fresh or fermentation food packaging film, a packaging material and a packaging container which use the film, are disclosed. The fiesh or fermentation food packaging film whose average pore size is 0.01 to 2[mu]m and whose porosity is 10^80%, wherein the film is manufactured from pure crystalline polymer without addition of inorganic compounds or organic compounds for pore formation, so as to impart rnicroporousness thereto by a dry stretching method which does not use an organic solvent and solvent. The packaging film which can pack fermentation food, such as Kimchi, etc., and fresh food, such as vegetables, etc., in which the packaging film can allow the food some operations, such as breathing and transpiration, etc., but restrain penetration of liquid, such as, water, etc., and can also effectively prevent leakage of smell, such that the food can be kept fiesh, through a simple handling process.

Description

technical field [0001] The present invention relates to a film for packaging fresh food or fermented food, a packaging material and a packaging container made of the film; in particular, the present invention relates to a packaging film capable of packaging fermented food such as kimchi and fresh food such as vegetables, and a packaging film made of the film Made of packaging materials and packaging containers, wherein, through simple processing methods, the packaging film can enable food to perform some activities, such as breathing and transpiration, while inhibiting the penetration of liquids such as water, and can effectively prevent odor loss , keeping food fresh. Background technique [0002] When fermented foods such as kimchi, thick soypaste mixed with chilies (Gochujang), fermented soybean paste (Doenjang), and salted seafood (Korean pickled Seafood (Jeotgal)), or fresh food such as vegetables or meat, etc. are packaged in the package, due to the continuous breathi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18B29C43/24
CPCY10T428/249979Y10T428/249978C08J2323/12C08J5/18B29C55/005B29C71/0063B29K2023/06B29K2105/04Y02P20/141
Inventor 崔世铉李重喆郑宇喆
Owner INTERPORE
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