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 PDFInfo
- 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
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- South Korea
- Prior art keywords
- film layer
- lldpe
- film
- ethylene
- density
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Classifications
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- 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
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- 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
Landscapes
- Wrappers (AREA)
- Laminated Bodies (AREA)
Abstract
Description
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.
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
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
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
Specifically, the first
First, the first
Next claim 2
The first
The manufacturer can adjust the transmittance of the first
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
To achieve the target numerical range of OTR and WVTR, the manufacturer sets the thickness of the first
division
Density of ethylene-octene polymer (g / cm < 2 >)
Thickness (μm)
The manufacturer set the thickness of the first
Referring to the experimental data in Table 3, it is confirmed that the transmittance of the first
That is, the first
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
The
The
In the packaging film of the present invention, the second
In the present invention, the first
Next, the
The first
The
Next, the second
Due to the use of such an adhesive, delamination occurs only in the
Here, the material of the second
Specifically, the second
First, the fourth
The fifth
Since the fourth and fifth LLDPE film layers are bonded to the
The overall interlayer structure of the
The interlayer structure of the first sheet
Material
Thickness (μm)
content(%)
Next, the
As shown in FIG. 2, the
By this interlayer structure, the permeable film layer becomes the first
4A and 4B are views showing the
The user removes the packaging film from the
The
Since the first
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
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
Here, the preliminary step S1 is bonded to the
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
The
Next, the second step (S3) is a step of co-extruding the
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)
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 >
Wherein the thickness of the first, second and third LLDPE film layers is adjusted to control the transmittance.
Wherein the permeability is controlled by adjusting the molecular weight or crystallinity of the plurality of LLDPE film layers.
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.
Wherein the material of the second PE film layer is LLDPE and comprises a plurality of coextruded LLDPE film layers.
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 >
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.
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.
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.
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 >
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.
Priority Applications (1)
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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)
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KR1020170072604A KR101867878B1 (en) | 2017-06-09 | 2017-06-09 | Transmitted film and packaging film having the same and method of manufacturing same |
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Citations (6)
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 |
-
2017
- 2017-06-09 KR KR1020170072604A patent/KR101867878B1/en active IP Right Grant
Patent Citations (6)
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 |
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