KR101867878B1 - Transmitted film and packaging film having the same and method of manufacturing same - Google Patents

Transmitted film and packaging film having the same and method of manufacturing same Download PDF

Info

Publication number
KR101867878B1
KR101867878B1 KR1020170072604A KR20170072604A KR101867878B1 KR 101867878 B1 KR101867878 B1 KR 101867878B1 KR 1020170072604 A KR1020170072604 A KR 1020170072604A KR 20170072604 A KR20170072604 A KR 20170072604A KR 101867878 B1 KR101867878 B1 KR 101867878B1
Authority
KR
South Korea
Prior art keywords
film layer
lldpe
film
ethylene
density
Prior art date
Application number
KR1020170072604A
Other languages
Korean (ko)
Inventor
이근순
정태홍
Original Assignee
주식회사 불스원
정태홍
대원산업 (주)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 불스원, 정태홍, 대원산업 (주) filed Critical 주식회사 불스원
Priority to KR1020170072604A priority Critical patent/KR101867878B1/en
Application granted granted Critical
Publication of KR101867878B1 publication Critical patent/KR101867878B1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/046—LDPE, i.e. low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for

Abstract

The present invention relates to a transparent film, a packaging film having the same, and a method of manufacturing the packaging film. The packaging film provided to pack a container having a diffusing or an absorbing material comprises a first PE film layer having a melting point of 120°C or less and transparency. The first PE film layer is made of linear low-density polyethylene (LLDPE) and formed with a plurality of LLDPE film layers which are coextruded. The plurality of LLDPE film layers may include an ethylene-octene copolymer in which ethylene and octane with different densities are included. According to the present invention, it is possible to precisely adjust transmission of oxygen, moisture, and others. It is possible to easily and stably separate an airtight film layer from a transparent film layer by forming a gap layer using polarity difference.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a transparent film, a packaging film containing the same,

The present invention relates to a transparent film, a packaging film containing the same, and a method of manufacturing the same. More particularly, the present invention relates to an interlayer peelable transparent film for use in a storage container containing a divergent or absorbing material, .

A packaging film used for a divergent type or an absorbent type product is formed by laminating a film layer for airtightness and a film layer having permeability such as a membrane film in the form of an absorbing substance such as a divergent substance such as a fragrance or a dehumidifying agent Is provided to package the built-in storage container.

The user removes the film layer for airtightness so that only the film layer having permeability remains in a form packaged in the storage container so that the substance contained in the storage container is not released to the outside and performs the function.

However, in the conventional packaging film, a separate adhesive was used between the airtight film layer and the permeable film layer, or the self-adhesive component between each film layer was contained to maintain the adhesive property. In this case, There is a problem that the permeable film layer is peeled off or torn together in the container, and the substance contained in the container is released to the outside, failing to exhibit its function.

Further, when a film composed of a single component of a transparent film layer is used, there is a problem in that it is difficult to precisely control the permeability in a manufacturing process.

Korean Patent Publication No. KR 10-2017-0048475 A

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the related art as described above, and it is an object of the present invention to provide an airtight film layer which can precisely control the permeability of oxygen, moisture, Which can be easily and stably separated from a transparent film layer, and a packaging film comprising the same and a process for producing the same.

In order to accomplish the above objects, the present invention provides a transparent film, a packaging film comprising the same, and a method of manufacturing the same, wherein a transparent film for packaging a storage container containing a divergent substance or an absorbent substance, A first PE film layer having a melting point of 120 DEG C or less and permeability, wherein the first PE film layer is made of LLDPE (linear low density polyethylene) and comprises a plurality of coextruded LLDPE film layers, The plurality of LLDPE film layers may comprise an ethylene-octene copolymer containing different densities.

Further, in the embodiment of the present invention of claim 1 wherein the PE film layer, an ethylene-octene polymer has a density 0.908 g / cm 3 The first layer and the LLDPE film is formed, containing a surface active agent to the first and arranged on the upper side of the LLDPE film layer, an ethylene-octene polymer has a density 0.902 g / cm 3 And a second LLDPE film layer disposed on the second LLDPE film layer, wherein the ethylene-octene polymer has a density of 0.92 g / cm < 3 > And a third LLDPE film layer formed on the third LLDPE film layer.

Further, in the embodiment of the present invention, the thickness of the first, second and third LLDPE film layers may be adjusted to control the transmittance.

In an embodiment of the present invention, the molecular weight or degree of crystallization of the plurality of LLDPE film layers may be controlled to adjust the transmittance.

Further, the packaging film of the present invention comprises a first PE film layer composed of the transmissive film, an EVOH film layer having a melting point within a range of 180 to 186 DEG C, and a second PE film layer adhered to the EVOH film layer, Wherein the second sheet of film and the aluminum foil are subjected to a dry lamination treatment to form a first sheet and a second sheet which are formed by coextruding an aluminum foil and a first sheet of paper, The second sheet can be configured to be lapped.

Further, in the embodiment of the present invention, the material of the second PE film layer is LLDPE, and may be formed of a plurality of coextruded LLDPE film layers.

Further, in the embodiment of the present invention of claim 2 wherein the PE film layer may be bonded to the EVOH film layer, an ethylene-octene polymer has a density 0.92 g / cm 3 Is formed, the fourth layer and the LLDPE film and the fourth is arranged on the upper side of the LLDPE film layer of ethylene consisting of 12 ~ 17μm thickness range-octene polymer has a density 0.92 g / cm 3 And a fifth LLDPE film layer having a thickness ranging from 54 to 60 mu m.

Further, in the embodiment of the present invention, a gap layer is formed between the EVOH film layer and the first PE film layer due to the difference between the polar molecular binding property of the EVOH film layer and the non-polar molecular binding property of the first PE film layer Lt; / RTI >

The packaging film manufacturing method of the present invention is a packaging film production method for packaging a storage container containing a divergent substance or an absorbent material, wherein the packaging film comprises a first PE film layer having a permeability at a melting point of 120 ° C or less Wherein the first PE film layer is made of LLDPE and comprises a plurality of LLDPE film layers, wherein the first PE film layers comprise the plurality of LLDPE film layers containing ethylene-octene polymer at different densities And co-extrusion molding.

In an embodiment of the present invention, the thickness of the plurality of LLDPE film layers may be adjusted in the first PE film layer, or the molecular weight or crystallinity of the plurality of LLDPE film layers may be adjusted to control the transmittance.

Further, in the embodiment of the present invention of claim 1 wherein the PE film layer in the pre-process, an ethylene-octene polymer has a density 0.908 g / cm 3 The first layer and the LLDPE film is formed, containing a surface active agent to the first and arranged on the upper side of the LLDPE film layer, an ethylene-octene polymer has a density 0.902 g / cm 3 And a second LLDPE film layer disposed on the second LLDPE film layer, wherein the ethylene-octene polymer has a density of 0.92 g / cm < 3 > A third LLDPE film layer formed by co-extrusion molding.

In addition, in the embodiment of the present invention, the first PE film layer produced in the pre-process, the EVOH film layer having a melting point in the range of 180 to 186 ° C, and the second PE film layer adhered to the EVOH film layer are co- A second step of co-extruding the PET film layer and the aluminum foil to form a second sheet, and a second step of forming the second PE film layer and the aluminum foil by a dry lamination process 3 < / RTI > process.

Further, in the embodiment of the present invention, the material of the second PE film layer is LLDPE and comprises a plurality of LLDPE film layers, wherein the preliminary step is carried out in such a manner that the ethylene-octene polymer has a density of 0.92 g / cm 3 Is formed, the fourth layer and the LLDPE film and the fourth is arranged on the upper side of the LLDPE film layer of ethylene consisting of 12 ~ 17μm thickness range-octene polymer has a density 0.92 g / cm 3 And a fifth LLDPE film layer having a thickness ranging from 54 to 60 mu m is coextruded to form a second PE film layer.

According to the present invention, the first PE film layer corresponding to the permeable film is composed of a plurality of LLDPE film layers and contains an ethylene-octene copolymer having different densities, , And water permeability can be adjusted to a desired value by the user.

Also, through the method of controlling the molecular weight or the degree of crystallization of the first PE film layer, the permeability of the diverging or absorbing material contained in the packaged storage container can be controlled.

Also, by forming the gap layer between the first PE film layer and the EVOH film layer, the user can easily remove the non-adhesive region and only the first PE film layer having permeability can be remained on the receiving container.

Brief Description of the Drawings Fig.
2 is a view showing a state in which a first sheet and a second sheet are joined together in a packaging film according to the present invention.
3 is a view showing a laminated structure of a packaging film according to the present invention.
4A and 4B are views showing a state in which the packaging film of the present invention is separated from a storage container.
5A and 5B are views showing a state in which the packaging film of the present invention is delaminated.

Hereinafter, preferred embodiments of a transparent film, a packaging film including the transparent film, and a manufacturing method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

First, technical terms used in the present invention will be described. The PE film layer refers to a polyethylene film layer, the EVOH film layer refers to an ethylene vinyl alcohol film layer, the PET film layer refers to a polyethylene terephthalate film layer, and the LLDPE The film layer refers to a linear low density polyethylene film layer.

2 is a view showing an interlaminar structure of a packaging film according to the present invention, and FIG. 3 is a view showing a step of dry-lamination and laminating the first and second sheet materials And FIGS. 4A and 4B are views showing a storage container packaged with the packaging film of the present invention, and FIGS. 5A and 5B are side sectional views showing a state of delamination in a storage container using the packing film of the present invention.

Referring to FIGS. 2 to 5B, the permeable film of the present invention includes a first PE film layer, and the material of the first PE film layer 30 may be an LLDPE film. In the embodiment of the present invention, Gt; LLDPE < / RTI > film layer.

Specifically, the first PE film layer 30 is provided so that a divergent material or an absorbent material can be transmitted, and is laminated with three LLDPE film layers.

First, the first LLDPE film layer 31 is formed so that an ethylene-octene copolymer has a density of 0.908 g / cm < 3 > And may be a film layer containing a surfactant. A surfactant is added to make the surface of the film layer lubricious and the storage property of the built-in material is enhanced when the film layer is adhered to the container.

Next claim 2 LLDPE film layer 33 is arranged on the upper side of the LLDPE film of claim 1 layer 31, an ethylene-octene polymer has a density 0.902 g / cm 3 As shown in FIG. The third LLDPE film layer 35 may be disposed on the second LLDPE film layer 33 and the ethylene-octene polymer may be formed to have a density of 0.92 g / cm 3 .

The first PE film layer 30 is composed of three LLDPE film layers and contains ethylene-octene polymers of different densities as described above.

The manufacturer can adjust the transmittance of the first PE film layer 30 by controlling the thickness of each of the first, second, and third LLDPE film layers 31, 33, and 35.

An experimental example of controlling the transmittance through the adjustment of the film layer thickness is explained as follows.


division

OTR (cc / m 2 · day · atm)
WVTR (g / m 2 · day · cm)
The first PE film layer (μm)
standard

Target value of radiation: 6000 ~ 8000
Dissipation target value: 10-20
Allowable thickness: 35 ~ 45

OTR (oxygen transfer rate) means oxygen permeability and WVTR (water vapor transfer rate) means water permeability.

The permeability to a divergent substance such as a vehicle air-freshener that emits a fragrance is set to the divergence target numerical value as shown in Table 1, and the allowable thickness of the first PE film layer 30 is set to the above range. In detail, the thickness of the first PE film layer 30 used in this experiment is 38 탆.

To achieve the target numerical range of OTR and WVTR, the manufacturer sets the thickness of the first PE film layer 30 as shown in Table 2 in this experiment.


division

Density of ethylene-octene polymer (g / cm < 2 >)
Thickness (μm) The third LLDPE film layer 0.92 8 The second LLDPE film layer 0.902 15 The first LLDPE film layer 0.908 15

The manufacturer set the thickness of the first LLDPE film layer 31 to 8 占 퐉, the second LLDPE film layer 33 to 15 占 퐉, and the third LLDPE film layer 35 to 15 占 퐉. The thickness of each film layer was adjusted and set and the divergence values were experimented. The experimental results are shown in Table 3 below.

division OTR (cc / m2dayatm) WVTR (g / m2daycm) One 7153 18 2 6453 17 3 6509 16 4 7614 18 5 6558 15 6 6098 16 7 6097 15

Referring to the experimental data in Table 3, it is confirmed that the transmittance of the first PE film layer 30 is controlled within the range of the divergence target value by controlling the thickness of the first, second and third LLDPE film layers 31, .

That is, the first PE film layer 30 used in the present invention has a higher transmittance than the conventional single-layer transparent packaging film product by controlling the thickness of a plurality of LLDPE film layers containing ethylene-octene polymer at different densities So that it can be precisely adjusted.

If the manufacturer wishes to achieve another divergence target value, the thickness of the first, second and third LLDPE film layers (31, 33, 35) may be adjusted differently.

As a matter of course, it is also possible to control the transmittance by adjusting the molecular weight or crystallinity of each LLDPE film layer in addition to the thickness between the first, second and third LLDPE film layers 31, 33 and 35. This may mean a density change of the ethylene-octene polymer.

The density is defined as the mass per unit volume, and can be a measure for determining the degree of crystallization of the polymer. The lower the density, the more loose the crystal structure, the more flexible, the lower the airtightness, and the higher the permeability. That is, the lower the density, the lower the crystallinity.

Conversely, a high density means that the crystallinity is high.

Here, each of the plurality of LLDPE film layers has non-polar molecular bonding in terms of its component properties, which can be enhanced by co-pressure during co-extrusion molding, and the adhesion between the layers can be improved.

Meanwhile, the packaging film 10 of the present invention may be a packaging film for packaging the storage container 1 in which a divergent substance or an absorbent substance is embedded, and may include a first sheet 20 and a second sheet 70, .

The first sheet 20 has a first PE film layer 30 corresponding to the permeable film and having a melting point of 120 ° C or lower, an EVOH film layer 50 having a melting point in the range of 180 to 186 ° C, The second PE film layer 60 adhered to the first PE film 50 may be coextruded by a compression roller device.

The second sheet 70 may be configured such that the PET film layer 90 and the aluminum foil 80 are co-extruded by a compression roller device.

In the packaging film of the present invention, the second PE film layer 60 and the aluminum foil 80 are subjected to dry lamination to bond the first sheet 20 and the second sheet 70 together .

In the present invention, the first PE film layer 30 becomes a transparent film, and the remaining film layer becomes an airtight film.

Next, the EVOH film layer 50 is disposed on the upper side of the first PE film layer 30 with respect to the storage container 1, and polar molecular bonding is performed due to its component properties.

The first PE film layer 30 and the EVOH film layer 50 are co-extruded while the first PE film layer 30 and the EVOH film layer 50 are co- The gap layer 40 is formed due to the difference in properties between the polar molecules.

The gap layer 40 is a part where delamination occurs, and the first PE film layer 30, which is a permeable film layer, and the remaining airtight film layer are separated.

Next, the second PE film layer 60 is disposed on the upper side of the EVOH film layer 50 with respect to the storage container 1. Here, the second PE film layer 60 is co-extruded with the EVOH film layer 50, but the second PE film layer 60 and the EVOH film layer 50 have a property difference between the non-polar molecular bonding and the polar molecular bonding Therefore, in order to prevent delamination at this site, co-extrusion molding is performed using an adhesive.

Due to the use of such an adhesive, delamination occurs only in the gap layer 40 formed between the first PE film layer 30 and the EVOH film layer 50.

Here, the material of the second PE film layer 60 may be an LLDPE film, and may be made of a plurality of coextruded LLDPE film layers in the embodiment of the present invention.

Specifically, the second PE film layer 60 is laminated with two LLDPE film layers.

First, the fourth LLDPE film layer 61 has a density of 0.92 g / cm < 3 > (ethylene-octene copolymer) And the thickness may be in the range of 12 to 17 mu m.

The fifth LLDPE film layer 63 has a density of 0.92 g / cm < 3 > (ethylene-octene copolymer) And the thickness may be in the range of 54 to 60 mu m.

Since the fourth and fifth LLDPE film layers are bonded to the EVOH film layer 50 and are intended to maintain airtightness, a material formed with the highest density among the LLDPE used for the first, second and third LLDPE film layers is used, And is relatively thick.

The overall interlayer structure of the first sheet 20 used in the embodiment of the present invention is shown in Table 4 below. It should be apparent, however, that the present invention is not limited to the structure shown in Table 4, but may include other structures capable of achieving the objects of the present invention.


The interlayer structure of the first sheet

Material
Thickness (μm)
content(%) The fifth LLDPE film layer LLDPE (d: 0.92) 57 100 The fourth LLDPE film layer LLDPE (d: 0.92) 15 100 glue 5 100 EVOH film layer EVOH 5 100 The third LLDPE film layer LLDPE (d: 0.92) 8 100 The second LLDPE film layer LLDPE (d: 0.902) 15 100 The first LLDPE film layer LLDPE (d: 0.908) + Surfactant 15 98 + 2 Total: 120

Next, the second sheet 70 is an airtight film layer, and the PET film layer 90 and the aluminum foil 80 are co-extruded.

As shown in FIG. 2, the first sheet 20 and the second sheet 70 are joined together. At this time, the second PE film layer 60 and the aluminum foil 80 are subjected to dry lamination and the lamination process proceeds.

By this interlayer structure, the permeable film layer becomes the first PE film layer 30 and the airtight film layer becomes the EVOH film layer 50, the second PE film layer 60 and the second sheet 70 .

4A and 4B are views showing the storage container 1 packaged by the packaging film of the present invention. Figs. 5A and 5B show the interlayer peeling state in the storage container 1 using the packing film of the present invention Fig.

The user removes the packaging film from the storage container 1 shown in FIG. 4A, as shown in FIG. 4B, so that the built-in material exerts its function. Referring to FIGS. 5A and 5B, The interlayer delamination is carried out in the gap layer 40.

The gap layer 40 is formed due to the difference in properties between the EVOH film layer 50 and the first PE film layer 30 even if the coextrusion is molded as described above. When the user lifts the packaging film, 40, and only the portions of the EVOH film layer 50, the second PE film layer 60 and the second sheet material 70 are lifted and the first PE film layer 30 is peeled off from the storage container 1, As shown in FIG.

Since the first PE film layer 30 is a transparent film, the material L contained in the storage container 1 may cause perfume emission such as a fragrance or moisture absorption such as dehydrated powder.

On the other hand, FIG. 1 shows a manufacturing process of a packaging film of the present invention. Referring to FIG. 1, the method of manufacturing a packaging film according to the present invention may be performed in the order of a first step (S1), a first step (S2), a second step (S3), and a third step (S4).

In the first step S1, the first PE film layer 30 may be manufactured. Specifically, an ethylene-octene copolymer has a density of 0.908 g / cm < 3 > A first LLDPE film layer 31 containing a surfactant and an ethylene-octene copolymer disposed on the first LLDPE film layer 31 at a density of 0.902 g / cm < 3 > Claim 2 LLDPE film layer 33 is formed of a and the second 2 LLDPE is arranged on the upper side of the film layer 33, an ethylene-octene polymer (ethylene-octene copolymer) is first formed at a density 0.92 g / cm 3 3 LLDPE And then the first PE film layer 30 is removed by co-extrusion molding the film layer 35. [

At this time, the manufacturer may adjust the thickness of the plurality of LLDPE film layers, or adjust the molecular weight or crystallinity of the plurality of LLDPE film layers to control the transmittance. The description thereof has been described in detail in the description of the packaging film, and therefore, it will be omitted here.

The second PE film layer 60 is made of LLDPE (linear low density polyethylene), and may be formed of a plurality of LLDPE film layers.

Here, the preliminary step S1 is bonded to the EVOH film layer 50, and the ethylene-octene copolymer has a density of 0.92 g / cm < 3 > A fourth LLDPE film layer 61 having a thickness in the range of 12 to 17 mu m and an ethylene-octene copolymer disposed on the fourth LLDPE film layer 61 at a density of 0.92 g / cm 3 And forming a second PE film layer 60 by co-extrusion molding a fifth LLDPE film layer 63 having a thickness in the range of 54 to 60 mu m.

Next, the first step (S2) is a step of forming a first PE film layer (30) having a melting point of 120 DEG C or lower, an EVOH film layer (50) having a melting point in the range of 180 to 186 DEG C, 2 PE film layer 60 to form the first sheet 20.

The gap layer 40 may be formed between the first PE film layer 30 and the EVOH film layer 50 due to the difference in properties during the first sheet 20 in the first step S2, The interlayer separation takes place in the gap layer 40. A detailed description thereof will be omitted herein.

Next, the second step (S3) is a step of co-extruding the PET film layer 90 and the aluminum foil 80 to form the second sheet 70. The second PE film layer 60 and the aluminum foil 80 are then subjected to dry lamination in order to bond the first sheet 20 and the second sheet 70 together. ).

The packaging film of the present invention is manufactured in the same manner as described above, and produces a packaging film which is easy to peel between layers and can control transmittance precisely.

The above matters are only specific examples of the packaging film and the manufacturing method thereof.

Therefore, it should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. do.

1: storage container
10: Packaging film
20: first sheet
30: first PE film layer
31: First LLDPE film layer
33: Second LLDPE film layer
35: Third LLDPE film layer
40: Clearance layer
50: EVOH film layer
60: Second PE film layer
61: Fourth LLDPE film layer
63: fifth LLDPE film layer
70: second sheet
80: Aluminum foil
90: PET film layer

Claims (13)

A permeable film for packaging a storage container containing a divergent substance or an absorbent substance,
The permeable film includes a first PE film layer having a melting point of 120 ° C or less and permeability, and the first PE film layer is made of LLDPE (linear low density polyethylene), and coextruded into a plurality of LLDPE film layers Lt; / RTI >
Wherein the plurality of LLDPE film layers comprise an ethylene-octene copolymer containing at least one of the ethylene-octene copolymers at different densities, and the density of the ethylene-octene polymer forming the plurality of LLDPE film layers is changed, Regulating,
Wherein the first PE film layer comprises:
A first LLDPE film layer in which an ethylene-octene polymer is formed at a density of 0.908 g / cm < 3 > and contains a surfactant;
A second LLDPE film layer disposed on the first LLDPE film layer and having an ethylene-octene polymer density of 0.902 g / cm 3 ; And
A third LLDPE film layer disposed on the second LLDPE film layer and having an ethylene-octene polymer density of 0.92 g / cm 3 ;
≪ / RTI >
delete The method according to claim 1,
Wherein the thickness of the first, second and third LLDPE film layers is adjusted to control the transmittance.
The method according to claim 1,
Wherein the permeability is controlled by adjusting the molecular weight or crystallinity of the plurality of LLDPE film layers.
A first PE film layer composed of the transmissive film of any one of claims 1, 3, and 4; an EVOH film layer having a melting point in the range of 180 to 186 ° C; and a second PE film A first sheet on which a layer is coextruded; And
And a second sheet formed by co-extruding the PET film layer and the aluminum foil,
Wherein the second PE film layer and the aluminum foil are dry laminated to bond the first sheet and the second sheet together.
6. The method of claim 5,
Wherein the material of the second PE film layer is LLDPE and comprises a plurality of coextruded LLDPE film layers.
The method according to claim 6,
Wherein the second PE film layer comprises:
An ethylene-octene polymer having a density of 0.92 g / cm < 3 > A fourth LLDPE film layer having a thickness in the range of 12 to 17 mu m; And
A fifth LLDPE film layer disposed on the fourth LLDPE film layer and having an ethylene-octene polymer density of 0.92 g / cm < 3 > and a thickness in the range of 54 to 60 mu m;
≪ / RTI >
6. The method of claim 5,
Wherein a gap layer is formed between the EVOH film layer and the first PE film layer by a difference between a polar molecular bonding property of the EVOH film layer and a non-polar molecular bonding property of the first PE film layer.
A packaging film manufacturing method for packaging a storage container containing a divergent substance or an absorbent substance,
Wherein the packaging film comprises a first PE film layer having a melting point of 120 DEG C or lower and permeability, the first PE film layer is made of LLDPE and comprises a plurality of LLDPE film layers,
Wherein the first PE film layer comprises a pre-extrusion molding step of coextruding the plurality of LLDPE film layers containing an ethylene-octene polymer containing at least one of them at different densities,
The density of the ethylene-octene polymer forming the plurality of LLDPE film layers is changed to control the transmittance,
In the pre-processing, the first PE film layer
Ethylene-octene polymer has a density 0.908 g / is formed from a cm 3, claim 1 LLDPE film layer containing a surfactant; is arranged on the upper side of the first 1 LLDPE film layer, an ethylene-octene polymer has a density 0.902 g / cm 3 A second LLDPE film layer formed on the substrate; And the second being arranged on the upper side of the LLDPE film layer, an ethylene-octene LLDPE film layer of claim 3 in which the polymer is formed of a density 0.92 g / cm 3; a method of producing the packaging film characterized in that the configuration is the co-extrusion molding.
10. The method of claim 9,
Wherein the permeability is controlled by controlling the thickness of the plurality of LLDPE film layers in the first PE film layer or adjusting the molecular weight or crystallinity of the plurality of LLDPE film layers.
delete The method of claim 9, wherein
The first PE film layer produced in the pre-process, the EVOH film layer having a melting point in the range of 180 to 186 ° C, and the second PE film layer adhered to the EVOH film layer to form a first sheet 1 process;
A second step of coextruding the PET film layer and the aluminum foil to form a second sheet; And
A third step of laminating the second PE film layer and the aluminum foil by a dry lamination process;
≪ / RTI >
13. The method of claim 12,
Wherein the second PE film layer is made of LLDPE and comprises a plurality of LLDPE film layers,
The pre-
An ethylene-octene polymer having a density of 0.92 g / cm < 3 > A fourth LLDPE film layer having a thickness in the range of 12 to 17 mu m; And an ethylene-octene polymer disposed on the fourth LLDPE film layer at a density of 0.92 g / cm < 3 > And a fifth LLDPE film layer having a thickness in the range of 54 to 60 占 퐉, wherein the second PE film layer is formed by the co-extrusion molding process.








KR1020170072604A 2017-06-09 2017-06-09 Transmitted film and packaging film having the same and method of manufacturing same KR101867878B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020170072604A KR101867878B1 (en) 2017-06-09 2017-06-09 Transmitted film and packaging film having the same and method of manufacturing same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020170072604A KR101867878B1 (en) 2017-06-09 2017-06-09 Transmitted film and packaging film having the same and method of manufacturing same

Publications (1)

Publication Number Publication Date
KR101867878B1 true KR101867878B1 (en) 2018-06-19

Family

ID=62790324

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020170072604A KR101867878B1 (en) 2017-06-09 2017-06-09 Transmitted film and packaging film having the same and method of manufacturing same

Country Status (1)

Country Link
KR (1) KR101867878B1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040096622A (en) * 2002-02-28 2004-11-16 다우 글로벌 테크놀로지스 인크. Film suitable for food packaging
JP2013111961A (en) * 2011-12-01 2013-06-10 Konishi Co Ltd Laminated film
KR101473330B1 (en) * 2013-11-25 2014-12-16 주식회사 동서 Inter-layer Easy peel multi-layer film and the manufacture method
KR20160091073A (en) * 2015-01-23 2016-08-02 김경호 Packaging method of cooking food and packaged cooking food
JP2016527102A (en) * 2013-06-18 2016-09-08 サウディ ベーシック インダストリーズ コーポレイション Oxygen barrier film for pipes
KR20170048475A (en) 2014-10-03 2017-05-08 미쓰이 가가쿠 토세로 가부시키가이샤 Laminate film, outer packaging bag for transfusion bag, and transfusion bag packaging body

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040096622A (en) * 2002-02-28 2004-11-16 다우 글로벌 테크놀로지스 인크. Film suitable for food packaging
JP2013111961A (en) * 2011-12-01 2013-06-10 Konishi Co Ltd Laminated film
JP2016527102A (en) * 2013-06-18 2016-09-08 サウディ ベーシック インダストリーズ コーポレイション Oxygen barrier film for pipes
KR101473330B1 (en) * 2013-11-25 2014-12-16 주식회사 동서 Inter-layer Easy peel multi-layer film and the manufacture method
KR20170048475A (en) 2014-10-03 2017-05-08 미쓰이 가가쿠 토세로 가부시키가이샤 Laminate film, outer packaging bag for transfusion bag, and transfusion bag packaging body
KR20160091073A (en) * 2015-01-23 2016-08-02 김경호 Packaging method of cooking food and packaged cooking food

Similar Documents

Publication Publication Date Title
JP6684718B2 (en) Blister pack laminate, blister pack using the same, blister pack package, and method for producing the laminate
JP5560520B2 (en) Laminated material for paper containers and liquid paper container
RU2018117665A (en) LAMINATED BARRIER FILM AND COVERING EDGE STRIP FOR PACKAGING
RU2014115719A (en) MULTILAYERED BARRIER FILM, LAYERED PACKAGING MATERIAL, INCLUDING FILM, PACKAGING CONTAINER, MADE OF LAYERED PACKING MATERIAL, AND METHOD FOR MANUFACTURING THE FILM
JP6255712B2 (en) Hygroscopic film and package
WO2010009245A3 (en) Polyamide structures for the packaging of moisture containing products
MXPA05002607A (en) Packaging films containing coextruded polyester and nylon layers.
KR102075089B1 (en) Laminates for blister packs and blister packs using the same
JP6516840B2 (en) Blister pack laminate and blister pack using the same
JP6035737B2 (en) Lid and sealed container using the lid
WO2015186640A1 (en) Laminate for use in blister pack, blister pack using same, and blister pack packaging
KR20150088807A (en) Low-adsorptivity-laminate multilayer film, composite film using same, and packaging material
JP2006193196A (en) Packaging material, and outer packaging bag for infusion solution bag using packaging material
JP2017012975A (en) Film for moisture absorption and gas adsorption
JP2007001225A (en) Layered product
KR101867878B1 (en) Transmitted film and packaging film having the same and method of manufacturing same
KR101867877B1 (en) Packaging film and method for manufacturing the same
JP2010149389A (en) Laminated body
KR102161562B1 (en) Antifogging multilayer film, laminate using same, and packaging material
JP2014068770A (en) Medicine wrapping sheet, medicine packaging blister pack and medicine package
JP2017193120A (en) Laminate and stick-shaped packaging bag using the same
JP6933282B2 (en) Sealant film, and packaging materials and packaging bags using it
JPS6225101B2 (en)
JP6572529B2 (en) BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a foam laminate having a thick foam layer and exhibiting excellent heat insulation properties with high production efficiency.
JP2015229296A (en) Laminate and pouch

Legal Events

Date Code Title Description
AMND Amendment
AMND Amendment
X701 Decision to grant (after re-examination)
N231 Notification of change of applicant
GRNT Written decision to grant