KR20130009513A - Film for wrapping edible parts of plants and method manufacturing the same - Google Patents

Abstract

PURPOSE: A method for manufacturing a film for packaging edible crops is provided to obtain a packaging film having air permeability without holes. CONSTITUTION: A method for manufacturing a film for packaging edible crops comprises: a step of mixing zeolite powder, pegmatite powder, a drying agent, and polyethylene resin and preparing a primary ingredient mixture(S110); a step of heating the primary ingredient mixture and extruding in a linear form; a step of cutting the extruded material and preparing master batch resin of a chip form(S120); a step of mixing the master batch resin, polyethylene resin, and drying agent and prepare a secondary ingredient mixture(S130); and a step of heating the secondary ingredient mixture and extruding and molding in a film form(S140). [Reference numerals] (AA) Start; (BB) End; (S110) Primary ingredient mixing step of preparing a primary ingredient mixture by mixing zeolite powder, pegmatite powder, a drying agent, and polyethylene resin; (S120) Master batch preparing step of preparing master batch resin in a chip form by heating the primary ingredient mixture, extruding in a linear form, and cutting; (S130) Secondary ingredient mixing step of additionally mixing the master batch resin with polyethylene resin and a drying agent; (S140) Packaging film preparing step of heating the secondary ingredient mixture and extrusion-molding in a film form

Description

Film for wrapping edible parts of plants and method manufacturing the same

The present invention relates to a packaging film prepared by using a raw material mixture of zeolite and pegmatite powder, and more particularly, to a packaging film and a method of manufacturing the same.

Edible crops, such as vegetables and fruits, are usually packaged in synthetic film or polyethylene film or other plastic containers after distribution.

Such edible crops are living organisms, which continue to breathe and grow for a certain period of time even after harvesting, thereby generating carbon dioxide and ethylene gas from the edible crops.

Carbon dioxide and ethylene gas are generated by the respiration and growth of edible crops, but it is desirable to discharge them out of the packaging as much as possible as they are unnecessary to maintain freshness in distribution.

However, since the conventional packaging material is formed of a synthetic resin film that is sealed off from the outside air and is distributed in a sealed state therein, carbon dioxide and ethylene gas generated from the food crop are accumulated inside the packaging material. Edible crops are too mature or easily decayed, resulting in the off-flavor.

In addition, when manufacturing a packaging material by mixing zeolite or pegmatite in a synthetic resin in order to ensure the breathability of the packaging material, there was a problem that the bubble hole is formed in the packaging material by the moisture generated during the mixing of the raw material to reduce the quality of the product.

The present invention is to overcome the above-mentioned problems of the prior art, by adding a desiccant to the mixture of zeolite and pegmatite or drying the mixture to prepare a packaging film having no air bubbles but air permeability, adsorption and carbon dioxide and ethylene gas It is an object of the present invention to provide an edible crop packaging film and a method of manufacturing the same, which are discharged to suppress over-maturation, decay and odor, and maintain the freshness of the edible crop even after long-term storage.

In order to achieve the above object, the present invention, the first raw material mixing step of obtaining a raw material mixture by mixing a zeolite powder, pegmatite powder, a drying agent and polyethylene resin (polyethylene resin); A master batch manufacturing step of heating the primary raw material mixture and extruding it in a linear form to cut and prepare a master batch resin in a chip shape; A secondary raw material mixing step of further mixing polyethylene resin and a desiccant to the master batch resin; And a packaging film manufacturing step of heating the secondary raw material mixture and extruding the film into a film shape.

The primary raw material mixture is composed of 35 to 45% by weight of the mixed powder of zeolite powder and pegmatite powder, 2 to 4% by weight of desiccant and 51 to 63% by weight of polyethylene resin.

The secondary raw material mixture is composed of 10-15% by weight of master batch resin, 2-4% by weight of desiccant and 80-88% by weight of polyethylene resin.

In addition, the present invention, the first raw material mixing step of mixing the zeolite powder and pegmatite powder and then drying and mixing the polyethylene resin therein to obtain a raw material mixture; A master batch manufacturing step of heating the first raw material mixture and extruding it in a linear shape to cut the chip to produce a master batch resin in a chip shape; A secondary raw material mixing step of mixing the master batch resin and the polyethylene resin after drying; And a packaging film manufacturing step of heating the secondary raw material mixture and extruding the film into a film shape.

The primary raw material mixture is composed of 35 to 45% by weight of the mixed powder of zeolite powder and pegmatite powder and 55 to 65% by weight of polyethylene resin.

The secondary raw material mixture is composed of 10-15% by weight of masterbatch resin and 85-90% by weight of polyethylene resin.

In addition, the present invention is a master batch resin made of a mixed powder of zeolite powder and pegmatite powder 35 to 45% by weight, desiccant 2 to 4% by weight and polyethylene resin 51 to 63% by weight, and master batch resin 10 to 15% by weight It provides an edible crop packaging film made by mixing 2 to 4% by weight of desiccant and 80 to 88% by weight of polyethylene resin based on%.

According to the edible crop packaging film and the manufacturing method according to the present invention configured as described above, by adsorbing carbon dioxide and ethylene gas from the packaging material by drying the mixture of zeolite and pegmatite or by adding a desiccant to prepare a breathable packaging film After it is discharged to the outside to prevent corruption, off-flavor and over-maturity in circulation, there is an effect that can maintain the freshness even in long-term storage.

In addition, by removing the moisture of the raw material mixture and the two-dimensional material mixture by using a drying agent or a drying process, it is possible to prevent the formation of bubble holes in the packaging film, and to ensure transparency and breathability to lower the defective rate of the product have.

In addition, far-infrared rays are emitted from zeolite and pegmatite to provide antibacterial, deodorant and antiseptic effect.

1 is a flow chart of the method for producing a film for packaging edible crops according to an embodiment of the present invention,
Figure 2 is a flow chart of the method for producing a food crop packaging film according to another embodiment of the present invention,
3 is a graph showing the emission test results of carbon dioxide of the packaging film prepared according to the composition ratio of the zeolite,
Figure 4 is a graph showing the emission test results of the ethylene gas of the packaging film prepared according to the composition ratio of the zeolite
Figure 5 is a graph showing a comparison of the carbon dioxide emission test results of the packaging film prepared using the mixed powder according to the present invention and a general film made of polyethylene,
Figure 6 is a graph showing the comparison of the ethylene gas emission test results of the packaging film prepared using the mixed powder according to the present invention and the general film made of polyethylene.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings by the embodiments.

≪ Example 1 >

1 is a flow chart of a method for manufacturing an edible crop packaging film according to an embodiment of the present invention, the first raw material mixing step of obtaining a raw material mixture by mixing a zeolite powder, pegmatite powder, a drying agent and polyethylene resin (S110) ); Master batch manufacturing step of producing a master batch resin of pellet or chip shape by cutting the primary raw material mixture to a temperature of 150 ~ 170 ℃ extruded in a linear form, then cut into a length of 2 ~ 3㎜ (S120); Secondary raw material mixing step of further mixing the polyethylene resin and the drying agent in the master batch resin (S130); And a packaging film manufacturing step (S140) of heating the secondary raw material mixture to a temperature of 150 to 170 ° C. and extruding it into a film having a thickness of 0.03 to 0.05 mm or less.

Preferably, the primary raw material mixture is composed of 35 to 45% by weight of the mixed powder of zeolite powder and pegmatite powder, 2 to 4% by weight of the desiccant and 51 to 63% by weight of polyethylene resin, the secondary raw material mixture is a master batch resin 10 15 wt%, 2-4 wt% desiccant and 80-88 wt% polyethylene resin. In addition, the mixed powder of zeolite powder and pegmatite powder is ground to a particle size of 300 or more and 600 mesh or less, and mixed at a mixing ratio of 4: 1 to 9: 1.

In Example 1, 40% by weight of the mixed powder obtained by pulverizing the zeolite powder and pegmatite powder into 300 mesh and then mixing 4: 1, 3% by weight of the desiccant, 6% by weight of lubricant, and 51% by weight of polyethylene resin were mixed with primary raw materials. To prepare a masterbatch resin. Then, with respect to 12.5% by weight of the master batch resin thus prepared, 3% by weight of the desiccant and 84.5% by weight of polyethylene resin was secondary mixed to prepare a packaging film having a thickness of 0.05 mm.

The zeolite was used as the zeolite, the pegmatite as the gypsum, and the silicate as the drying agent. As the polyethylene resin, high density polyethylene (HDEP) or low density polyethylene (LDEP) can be optionally used. The lubricant is further used to increase the binding force of the raw material mixture, and talc or graphite is used, and its use may be omitted.

Zeolite is a general term for minerals which are aluminum silicate hydrates of alkali and alkaline earth metals. They are colorless transparent, white translucent and have high water content, crystal properties, and acidity.

Pegmatite is a rock of white matter that is formed from a residual rich in volatile components at the end of the process of consolidation through magma penetration and is known as a substance that releases a large amount of far infrared rays. And preservative action.

The desiccant is for removing the moisture of the raw material, and one or a mixture of two or more of the silicate, calcium chloride or glycerol can be used.

The desiccant is preferably a granule of microparticles or particles of a diameter of 10 micrometers or less, and it is preferable to mix the raw material mixture for a time sufficient for the desiccant to completely absorb all the moisture from the raw material mixture.

Such a drying agent prevents the moisture contained in the above-mentioned raw material from being trapped in the drying agent during the mixing of the raw materials of the zeolite powder, the pegmatite powder and the polyethylene resin, thereby preventing the formation of bubbles in the packaging film.

In the present invention, cobalt, manganese, and zinc-based drying agents may also be used.

More specifically, cobalt and manganese-based desiccants are used as a desiccant in the first raw material mixing step for preparing the master batch resin, and a zinc metal soap-based desiccant which combines with the primary desiccant to further activate the catalysis reaction is used as a secondary raw material mixture. Use to step.

The ratio is preferably about 3 to 4: 4 to 6: 1 to 3 of cobalt: manganese: zinc based on the action of the primary and secondary desiccants and the degree of drying.

The finished packaging film is formed in a thickness of 0.03 or more and 0.05 mm or less, because, when manufactured in less than 0.03 mm, the film may be easily damaged by the components of the zeolite powder and pegmatite powder, which may make it difficult to perform the function of the packaging material. In addition, when manufactured in excess of 0.05mm, there is a problem in the adsorption and discharge of carbon dioxide and ethylene gas is poor breathability and transparency. Therefore, the present inventors have obtained the optimum effect as a result of manufacturing the thickness of the packaging film of 0.03 or more to 0.05mm or less according to the experimental value obtained through several experiments.

In addition, the mixed powder of the zeolite powder and pegmatite powder contained in the raw material mixture of the present invention has a content in the range of 35 to 45% by weight, depending on the size of the content may be prepared by dividing the packaging film for long-term storage and short-term storage. have.

As such, when packaging and distributing edible crops using the packaging material prepared according to Example 1, ethylene gas or carbon dioxide generated due to the respiratory and growth effects of the edible crops is impaired in the packaging film, that is, zeolite and pegmatite. By being adsorbed by the outside and discharged to the outside, the outside oxygen is introduced into the inside, thereby keeping the edible crop fresh in distribution and effectively suppressing over-maturation. In addition, by removing the moisture of the raw material mixture using a desiccant, it is possible to prevent the generation of bubble holes in the packaging film, and to ensure transparency with air permeability.

<Example 2>

Figure 2 is a flow chart of a method for manufacturing an edible crop packaging film according to another embodiment of the present invention, after mixing the zeolite powder and pegmatite powder and dried in a drier at a temperature of 80 ~ 130 ℃ for 2 hours, here polyethylene Primary raw material mixing step of obtaining a raw material mixture by mixing the resin (S210); Master batch manufacturing step (S220) of heating the primary raw material mixture to a temperature of 150 ~ 170 ℃ extruded in a linear shape, cut into a length of 2 ~ 3mm to produce a pellet or chip-shaped master batch resin (S220); A secondary raw material mixing step (S230) of maintaining the master batch resin and polyethylene resin at a temperature of 80 to 130 ° C. in a dryer for 2 hours to dry and then mixing them; And a packaging film manufacturing step (S240) of heating the secondary raw material mixture to a temperature of 150 to 170 ° C. and extruding it into a film having a thickness of 0.03 or more and 0.05 mm or less.

Preferably, the primary raw material mixture is composed of 35 to 45% by weight of the mixed powder of zeolite powder and pegmatite powder and 55 to 65% by weight of polyethylene resin, and the secondary raw material mixture is 10 to 15% by weight of the master batch resin and polyethylene resin It consists of 85 to 90% by weight. In addition, the mixed powder of zeolite powder and pegmatite powder is ground to a particle size of 300 or more and 600 mesh or less, and mixed at a mixing ratio of 4: 1 to 9: 1.

In Example 2, the master batch resin was prepared by first mixing 40% by weight of the mixed powder obtained by pulverizing the zeolite powder and pegmatite powder into 300 mesh, and then mixing 4: 1, 6% by weight of lubricant, and 54% by weight of polyethylene resin. Prepared. Then, to 12.5% by weight of the masterbatch resin thus prepared, 87.5% by weight of polyethylene resin was secondary mixed to prepare a packaging film having a thickness of 0.05 mm.

The zeolite was used as the zeolite, the pegmatite as the gypsum, and the silicate as the drying agent. Polyethylene resins may optionally be high density polyethylene or low density polyethylene. The lubricant is additionally used to increase the binding strength of the raw material mixture, and talc or graphite may be used, and the use thereof may be omitted.

Looking at the drying process in Example 2 in detail, the desiccant in powder form is placed in a dryer, compressed to a porous desiccant bed by applying sufficient pressure to the desiccant powder, and then provided on the porous desiccant bed by providing a raw material mixture in powder form. In addition, sufficient heat is applied to the raw material mixture to allow moisture to escape from the raw material mixture and be absorbed by the porous desiccant bed.

In this case, as the desiccant used, a porous alkaline earth oxide prepared from any one or a mixture of calcium oxide, magnesium oxide, strontium oxide or barium oxide may be used. The higher the porosity, the smaller the particles, the higher the amount. Since water can absorb moisture, the absorption rate can be adjusted by adjusting the type and size of the particles.

Thus, according to the packaging film for edible crops prepared in Example 2, by removing the moisture of the raw material mixture using a predetermined drying process without including a desiccant in the finished product packaging film, bubble holes are generated in the packaging film Can be prevented and transparency can be ensured together with breathability.

&Lt; Test Example 1 >

3 is a graph showing the emission test results of carbon dioxide (CO ₂ ) of the packaging films prepared according to the composition ratio of the zeolite.

In Test Example 1, the packaging material prepared according to Example 1 of the present invention was used, and 40 wt% of the mixed powder obtained by pulverizing zeolite (macrophite) powder and pegmatite (macrite) powder in a 300 mesh and then mixing 4: 1 And, the master batch resin was prepared by mixing a 3% by weight of the desiccant (silicate), 6% by weight of the lubricant (talc) and 51% by weight of polyethylene resin. Then, to 12.5% by weight of the masterbatch resin thus prepared, 3% by weight of the desiccant (silicate) and 84.5% by weight of polyethylene resin were mixed with secondary raw materials to prepare a packaging film having a thickness of 0.05 mm.

Therefore, in 100% by weight of the raw material mixture of the final finished product, the mixed powder of zeolite and pegmatite is made to be 5% by weight.

As shown in the graph of FIG. 3, the carbon dioxide emissions after a certain period of time were almost the same for all products, but the initial hourly carbon dioxide emissions were only 3.5%, 3.6%, and 5% by weight of zeolite, respectively. It can be seen that when the mixed powder of the present invention is mixed at 5% by weight than in the case.

&Lt; Test Example 2 &

4 is a graph showing the emission test results of ethylene gas (C ₂ H ₄ ) of the packaging films prepared according to the composition ratio of the zeolite.

In Test Example 2, a packaging material prepared according to Example 1 of the present invention was used, and the composition ratio thereof was as described in Test Example 1 above. Therefore, in Test Example 2, the mixed powder of zeolite and pegmatite is made of 5% by weight in 100% by weight of the raw material mixture of the final finished product.

As shown in the graph of Figure 4, the ethylene gas emissions after a certain time is almost the same for all products, the initial hourly carbon dioxide emissions are mixed only 3.5, 3.6 and 5% by weight of zeolite, respectively It can be seen that when the mixed powder of the present invention is mixed at 5% by weight than one case, it appears higher.

When comparing the efficacy of the edible crop packaging film prepared according to the present invention with a general film made of polyethylene by Comparative Examples 1 to 4 as follows.

&Lt; Comparative Example 1 &

5 is a graph showing a comparison of carbon dioxide (CO ₂ ) emission test results of the packaging film prepared using the mixed powder according to the present invention and the general film made of polyethylene.

In the carbon dioxide emission test of Comparative Example 1, a packaging film prepared according to Example 1 of the present invention was used, and the composition ratio thereof was as described in Test Example 1 above, and the general film was made of 100 wt% polyethylene. Therefore, in Comparative Example 1, the mixed powder of zeolite and pegmatite was manufactured to be 5 wt% in 100 wt% of the raw material mixture of the final finished product of the present invention, and the thickness thereof was made of a packaging film of 0.03 mm.

As shown in Figure 5, in the case of the packaging film prepared by using the mixed powder according to the invention and the general film made of polyethylene, it can be seen that the residual amount of carbon dioxide remaining in the packaging material decreases over time In the case of using the packaging film according to the present invention, the concentration of carbon dioxide is rapidly lowered especially at the initial stage than the case of using a general film made of polyethylene, it can be seen that the carbon dioxide emission effect is better.

Comparative Example 2

6 is a graph showing a comparison of ethylene gas (C ₂ H ₄ ) emission test results of the packaging film prepared using the mixed powder according to the present invention and the general film made of polyethylene.

In the ethylene gas emission test of Comparative Example 2, the packaging film prepared according to Example 1 of the present invention was used. The composition ratio was as described in Test Example 1, and the general film was made of 100% by weight of polyethylene. . Therefore, in Comparative Example 2, the mixed powder of zeolite and pegmatite was manufactured to be 5 wt% in 100 wt% of the raw material mixture of the final finished product of the present invention, and the thickness thereof was made of a packaging film of 0.03 mm.

As shown in FIG. 6, in the case of the packaging film prepared using the mixed powder according to the present invention and the general film made of polyethylene, the residual amount of ethylene gas remaining in the packaging material decreases over time. However, the case of using the packaging film according to the present invention can be seen that the ethylene gas emission effect is better, especially since the initial concentration of ethylene gas is rapidly lower than the case of using a general film made of polyethylene.

&Lt; Comparative Example 3 &

Table 1 below is a comparison of the quality characteristics of the packaging film prepared by using the mixed powder according to the present invention and the apple 'Fuji' sealedly sealed with a general film made of polyethylene. This is a table showing the result of conducting quality characteristic survey on March 25, 2011, sampling was started on November 24, 2011 and sampled on March 24, 2011.

In the quality characteristic change test of Comparative Example 3, the packaging film prepared according to Example 1 of the present invention was used, and the composition ratio thereof was as described in Test Example 1 above, and the general film was made of 100 wt% polyethylene. . Therefore, in Comparative Example 3, the mixed powder of zeolite and pegmatite was made to be 5 wt% in 100 wt% of the raw material mixture of the final finished product of the present invention, and the thickness thereof was made of a packaging film of 0.05 mm.

process Sugar content
(° Bx) Acidity
(%) Hardness
(N) Chromaticity
(brightness) Chromaticity a
(Red) Chromaticity b
(green) Weight loss rate
(%) Corruption rate
(%) Heavy browning
(%) Normal
film 13 0.188 14.2 51.6 19.9 24 3.59 2.7 0 Packing
film 13.2 0.19 15.1 52.3 19.7 25.7 0.24 1.2 0
result
The sweetness and acidity of apples wrapped with packaging film are slightly higher. The hardness of the packaging film is high. Overall, the color of apples on the packaging film is bluer and clearer. There is no initial weight, resulting in low weight loss without treatment. There is a slight mold on the apple nipple but no problem with the value of the product.

As can be seen in Table 1, the case where the mixed film of zeolite and pegmatite of the present invention using a packaging film made of 5% by weight of sugar, acidity, hardness and The freshness was high and the corruption rate was remarkably low.

&Lt; Comparative Example 4 &

Table 2 below is a comparison of the quality characteristics of the packaging film prepared using the mixed powder according to the present invention and the `` declaration '' of the pear sealed with a general film made of polyethylene, 0 ℃ condition after harvest in October 2010 This is a table showing the results of quality characteristics survey by storing in Pyeongtaek storage and sampling on March 15, 2011.

In the quality characteristic change test of Comparative Example 4, the packaging film prepared according to Example 1 of the present invention was used, and the composition ratio thereof was as described in Test Example 1 above, and the general film was made of 100% by weight of polyethylene. . Therefore, in Comparative Example 4, the mixed powder of zeolite and pegmatite was made to be 5 wt% in 100 wt% of the raw material mixture of the final finished product of the present invention, and the thickness thereof was made of a packaging film of 0.05 mm.

process Sugar content
(° Bx) Acidity
(%) Hardness
(N) Chromaticity
(brightness) Chromaticity a
(Red) Chromaticity b
(green) Weight loss rate
(%) Corruption rate
(%) Heavy browning
(%) Normal
film 11.3 0.09 12.3 59.7 7.53 36.6 3.14 30.6 56.3 Packing
film 11.7 0.1 12.8 61 6.6 37.4 0.28 17 25
result
Slightly high sugar and acid contents of pears packed with packaging films. The hardness of the packaging film is high. Overall, the color of the pears packed in the packaging film is blue. Less weight reduction of packaging film. High corruption rate of general film. The browning of general film is severe.

As can be seen in Table 2, the case where the mixed film of the zeolite and pegmatite of the present invention was used in the packaging film made of 5% by weight of sugar, acidity, hardness and Freshness was high, and corruption rate and fruit browning were significantly low.

The embodiments of the present invention described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and are not intended to cover all the technical ideas of the present invention. Therefore, various equivalents And variations are possible.

Accordingly, the present invention is not limited to the above-described embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Such changes will fall within the scope of the claims.

Claims (8)

A primary raw material mixing step of obtaining a raw material mixture by mixing zeolite powder, pegmatite powder, desiccant and polyethylene resin;
A master batch manufacturing step of heating the primary raw material mixture and extruding it in a linear shape to cut and prepare a master batch resin in a chip shape;
A secondary raw material mixing step of additionally mixing polyethylene resin and a desiccant to the masterbatch resin; And
The method of manufacturing an edible crop packaging film comprising a packaging film manufacturing step of heating the secondary raw material mixture to extrusion molding into a film shape. The method of claim 1,
The primary raw material mixture is a manufacturing method of the edible crop packaging film, characterized in that consisting of 35 to 45% by weight of the mixed powder of zeolite powder and pegmatite powder, 2 to 4% by weight of the desiccant and 51 to 63% by weight of polyethylene resin. The method of claim 1,
The secondary raw material mixture is a manufacturing method of the edible crop packaging film, characterized in that consisting of 10 to 15% by weight of the master batch resin, 2 to 4% by weight of the desiccant and 80 to 88% by weight of polyethylene resin. Mixing the zeolite powder with pegmatite powder and drying the mixture; then mixing the polyethylene resin with the primary raw material mixing step to obtain a raw material mixture;
A masterbatch manufacturing step of heating the primary raw material mixture and extruding it in a linear form to cut it to produce a chip-shaped masterbatch resin;
A secondary raw material mixing step of mixing the master batch resin and polyethylene resin after drying; And
The method of manufacturing an edible crop packaging film comprising a packaging film manufacturing step of heating the secondary raw material mixture to extrusion molding into a film shape. 5. The method of claim 4,
The primary raw material mixture is a manufacturing method of the edible crop packaging film, characterized in that consisting of 35 to 45% by weight of the mixed powder of zeolite powder and pegmatite powder and 55 to 65% by weight of polyethylene resin. 5. The method of claim 4,
The secondary raw material mixture is a manufacturing method of the edible crop packaging film, characterized in that consisting of 10 to 15% by weight of the master batch resin and 85 to 90% by weight polyethylene resin. An edible crop packaging film prepared by the manufacturing method of any one of claims 1 to 6. Masterbatch resin made of a mixed powder of zeolite powder and pegmatite powder 35 to 45% by weight, desiccant 2 to 4% by weight and polyethylene resin 51-63% by weight,
Edible crop packaging film made by mixing 2 to 4% by weight of the desiccant and 80 to 88% by weight of polyethylene resin relative to 10 to 15% by weight of the master batch resin.

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