WO2022114879A1 - Sheet having closed cell layer - Google Patents

Sheet having closed cell layer Download PDF

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Publication number
WO2022114879A1
WO2022114879A1 PCT/KR2021/017721 KR2021017721W WO2022114879A1 WO 2022114879 A1 WO2022114879 A1 WO 2022114879A1 KR 2021017721 W KR2021017721 W KR 2021017721W WO 2022114879 A1 WO2022114879 A1 WO 2022114879A1
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WO
WIPO (PCT)
Prior art keywords
resin film
sheet
layer
cell layer
film layer
Prior art date
Application number
PCT/KR2021/017721
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French (fr)
Korean (ko)
Inventor
박수미
김근모
Original Assignee
주식회사 동성케미컬
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.)
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Publication date
Priority claimed from KR1020210165529A external-priority patent/KR20220074778A/en
Application filed by 주식회사 동성케미컬 filed Critical 주식회사 동성케미컬
Publication of WO2022114879A1 publication Critical patent/WO2022114879A1/en

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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
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled

Definitions

  • the present invention relates to an eco-friendly sheet having a closed cell layer.
  • bubble plastic material Conventional sheets consist of two layers of plastic sheets laminated together to form a so-called bubble plastic material. These bubble shapes are vacuum formed onto one sheet, which is laminated to a substantially flat sheet to form a sealed bubble between the two layers.
  • the bubble generally has a circular or cylindrical shape, and in addition, hexagonal, diamond-shaped, and partially spherical bubbles are also known.
  • U.S. Patent No. 4,869,939 discloses an air bubble cell sheet including a cell arrangement in which adjacent cells have a fluid structure with each other through an intermediate passage.
  • Japanese Laid-Open Patent Publication No. 2003-2377842 discloses a sheet having air cells connected in groups by an intermediate connecting passage.
  • the above-described sheets are not only unsatisfactory in preventing deformation and/or damage caused by external shocks or harsh external environmental conditions, but are also insufficient in maintaining the shape or durability of the air cell.
  • a general plastic material as a general plastic material is used, it may adversely affect the environment, and there is a limit in terms of discrimination.
  • the technical problem to be achieved by the present invention is that it is possible to improve the durability of the sheet and maintain the shape of the closed cell by preventing deformation or breakage under external impact or harsh external environmental conditions, as well as improving the identification ability by printing a specific image. It is to provide a sheet having a closed cell layer that can have and can exhibit eco-friendliness.
  • the present invention is a first resin film layer; a cell layer formed on one surface of the first resin film layer and including a plurality of closed cells spaced apart from each other at a predetermined interval; and a printing part formed on at least one surface of the first resin film layer and having a predetermined color or pattern, wherein the plurality of closed cells (A) are The total area is greater than the total area of the remaining cell layers (B) excluding the closed cells, to provide a sheet having a closed cell layer.
  • the ratio between the total area of the plurality of closed cells (A) and the total area of the remaining cell layers (B) except for the plurality of closed cells may be 2 to 15:1. .
  • the cell layer may include: a junction in which one surface of the second resin film layer is laminated on one surface of the first resin film layer and fused; and a non-bonding portion in which the first resin film layer and the second resin film layer are not fused to form a closed cell sealed with air therebetween.
  • the cell layer may include a predetermined embossed pattern formed by repeatedly arranging a plurality of closed cells.
  • the horizontal cross-sectional shape of the embossed pattern may be selected from the group consisting of a circle, a semicircle, a sector shape, and a polygon.
  • At least one of the first resin film layer and the cell layer may include a biodegradable polymer.
  • the biodegradable polymer is starch, cellulose, chitin, PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ⁇ -caprolactone), PBAT (Polybutylene adipate terephthalate), PGA (polyglycolacid), It may include at least one selected from the group consisting of aliphatic polyester (AP), 3-hydroxybutyrate-co 3-hydroxy valerate (P (P)), and polybutylene succinate (PBS).
  • AP aliphatic polyester
  • P 3-hydroxybutyrate-co 3-hydroxy valerate
  • PBS polybutylene succinate
  • the printing unit is formed on the other surface of the first resin film layer, is formed on one surface of the first resin film layer in contact with the cell layer, or to be formed on both can
  • the printing unit may be formed by laminating a printing layer in which a predetermined color or pattern is printed on the other surface of the first resin film layer.
  • the printing layer is starch, cellulose, chitin, PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ⁇ -caprolactone), PBAT (Polybutylene adipate terephthalate), PGA (polyglycolacid), AP (aliphaticpolyester), PHBV (3-hydroxybutyrate-co 3-hydroxy valerate)), PBS (Polybutylene Succinate), and may include one or more biodegradable polymers selected from the group consisting of combinations thereof.
  • the sheet having a closed cell layer according to an embodiment of the present invention can prevent deformation or damage from external impact or harsh external environmental conditions, thereby implementing sheet durability and maintaining the shape of the closed cell, as well as By printing an image, it can be distinguished, and it can have an eco-friendly advantage.
  • FIG. 1 is a cross-sectional view of a sheet having a closed cell layer according to an embodiment of the present invention.
  • FIGS. 2 and 3 are schematic plan views showing various embodiments of the bonded portion 130 and the non-bonded portion 140 provided in the sheet having a closed cell layer according to the present invention.
  • FIGS. 4 to 6 are perspective views illustrating various embodiments of the bonded portion 130 and the non-bonded portion 140 provided in the sheet having a closed cell layer according to an embodiment of the present invention.
  • FIG. 7 to 9 are cross-sectional views illustrating various embodiments of a printing unit provided in a sheet having a closed cell layer according to the present invention.
  • first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms.
  • the above terms are used only for the purpose of distinguishing one component from another.
  • a first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.
  • FIG. 1 is a cross-sectional structural diagram schematically showing an embodiment of a sheet having a closed cell layer according to the present invention.
  • the sheet 100 having a closed cell layer includes a first resin film layer 121 ; and a cell layer 120 formed on one surface of the first resin film layer 121 and including a plurality of closed cells 120a spaced apart from each other at predetermined intervals; and a printing unit 150 formed on at least one surface of the first resin film layer 121 and having a predetermined color or pattern.
  • the cell layer 120 includes a plurality of closed cell forming portions (A) and closed cell non-forming portions (B), but by adjusting the area ratio between them to a predetermined range It is differentiated from the conventional sheet in that the durability of the sheet and the shape retention of the closed cell can be improved.
  • the first resin film layer 121 and/or the cell layer 120 may be composed of a biodegradable polymer to represent eco-friendliness, and may include a print unit 150 to increase readability and discrimination.
  • the first resin film layer 121 serves to support and protect the plurality of closed cells 120a.
  • it may be used as a coating substrate or a substrate film for forming the printing part 150 to be described later.
  • the first resin film layer 121 is not particularly limited, and a plastic film commonly known in the art may be used without limitation. In consideration of environmental friendliness, the first resin film layer 121 is preferably composed of a conventional biodegradable polymer known in the art.
  • the biodegradable polymer is a polymer whose chemical structure is remarkably changed under environmental conditions such as light, heat and moisture and whose material change is measured, a biodegradable polymer, a biodegradable polymer, etc. concept that includes Specifically, since biodegradable polymers (or biodegradable plastics) are plastics that are 100% naturally decomposed during landfilling, unlike conventional hydrophobic plastics, there is no environmental load due to landfilling, so it is eco-friendly.
  • the degree of biodegradation of these biodegradable polymers is not particularly limited. As an example, the degree of biodegradation may be 80% or more, specifically, it may be 80 to 100%.
  • the biodegradability may be based on the KS M ISO 14855-1 standard.
  • biodegradable polymers can be classified into natural polymers, synthetic polymers, microorganisms produced polymers, and blends of natural polymers and synthetic polymers.
  • natural polymer-based biodegradable polymers that can be used include starch extracted from grains, chitin obtained from crab or shrimp shells, cellulose, or a combination thereof. .
  • These natural polymer-based biodegradable polymers have lower processability than synthetic biodegradable polymers, but are relatively inexpensive.
  • starch is inexpensive and various denaturation techniques can be used to improve processability.
  • non-limiting examples of synthetic biodegradable polymers by chemical synthesis include PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ⁇ -caprolactone), PBAT (Polybutylene adipate terephthalate), PGA (polyglycolacid), AP (aliphaticpolyester) , PHBV (3-hydroxybutyrate-co 3-hydroxy valerate), PBS (Polybutylene Succinate), or a combination thereof.
  • PLA polylactide
  • PHA polyhydroxyalkanoates
  • PCL poly ⁇ -caprolactone
  • PBAT Polybutylene adipate terephthalate
  • PGA polyglycolacid
  • AP aliphaticpolyester
  • PHBV PHBV (3-hydroxybutyrate-co 3-hydroxy valerate
  • PBS Polybutylene Succinate
  • the above-described natural and synthetic biodegradable polymers can be mixed.
  • starch and PLA, starch and PCL, starch and aliphatic polyester, etc. may be mixed, and the mixing ratio thereof may be appropriately adjusted.
  • PLA polylactide
  • PBAT Polybutylene adipate terephthalate
  • the thickness of the first resin film layer 121 is not particularly limited, and may be appropriately adjusted within a typical thickness range used in the art.
  • the cell layer 120 is formed on one surface of the first resin film layer 121, and includes a plurality of closed cells 120a spaced apart from each other at predetermined intervals. do.
  • the cell layer 120 is a bonding portion 130 formed by laminating at least a portion of one surface of the first resin film layer 121 and at least a portion of one surface of the second resin film layer 122 that are disposed to face each other. (121, 122) includes a non-bonding portion 140 separated by partially non-bonding. More specifically, the bonding portion 130 refers to a flat portion in which one surface of the second resin film layer 122 is laminated on one surface of the first resin film layer 121 and adhered thereto.
  • the non-bonding portion 140 refers to a convex portion in which the first resin film layer 121 and the second resin film layer 122 are partially non-fused, and a predetermined air is filled in an internal space therebetween. A closed cell 120a sealed with a predetermined air is formed in the non-junction portion 140 .
  • a plastic film commonly known in the art may be used without limitation, and specifically the same as the material constituting the first resin film layer 121 described above. Or it is preferable to use a different biodegradable polymer.
  • the second resin film layer 122 is the same as or different from each other, and each independently starch, cellulose, chitin, PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ⁇ -caprolactone), One selected from the group consisting of PBAT (Polybutylene adipate terephthalate), PGA (polyglycolacid), AP (aliphaticpolyester), PHBV (P (3-hydroxybutyrate-co 3-hydroxy valerate)), PBS (Polybutylene Succinate), and combinations thereof may include more than one.
  • PBAT Polybutylene adipate terephthalate
  • PGA polyglycolacid
  • AP aliphaticpolyester
  • PHBV P (3-hydroxybutyrate-co 3-hydroxy valerate)
  • PBS Polybutylene Succinate
  • the second resin film layer 122 is made of a mixture of polylactide (PLA) and polybutylene adipate terephthalate (PBAT), which can improve durability and thermal and mechanical properties while maintaining the biodegradability of the sheet. have an advantage
  • junction part 130 which is a flat part and the non-junction part 140 which is a convex part are alternately and repeatedly arranged, and they may be spaced apart according to a predetermined interval. In this case, it is preferable in terms of being able to continuously maintain the shapes of the junction part 130 and the non-junction part 140 under external impact or severe external environmental conditions.
  • the non-junction portion 140 is sealed with air, and has a closed cell 120a having a predetermined pattern shape.
  • the non-bonding portion 140 may be manufactured according to a conventional method known in the art. For example, when the first resin film layer 121 and the second resin film layer 122 are laminated, some of the contact parts of the two layers 121 and 122 are made non-contact, and then in the space between the non-contact parts. It may be manufactured by injecting air and sealing the contact portion between the first resin film layer 121 and the second resin film layer 122 surrounding the air injection unit through lamination and/or fusion bonding. At this time, the method of sealing the air is not particularly limited. And the density of the air filled inside the closed cell (120a) is not particularly limited, and can be appropriately adjusted within a range known in the art.
  • the total area of the plurality of closed cells (A) is greater than the total area of the remaining cell layers (B) except for the closed cells. It could be a big one. That is, it is preferable that the total area of the joined portions 130 and B on a plane is smaller than the total area of the non-bonded portions 140 and A in terms of improving the durability of the sheet and shape retention of the closed cell layer.
  • the ratio of the total area of the remaining cell layers (B, junction, 130) to the total area of the plurality of closed cells (A, non-junction, 140) except for the plurality of closed cells is 1: 2 to 15 days.
  • 1: 3 to 15, 1: 2.5 to 12, 1: 4.5 to 13, 1: 4.5 to 10, 1: 2.5 to 10, 1: 3 to 10, 1: 3 to 8, 1: 2.5 to 7, 1: 3 to 5, 1: 2.5 to 4 may be carried out according to the area shape and pattern of the non-junction portion 140.
  • the ratio between the area of the cell layer (B, junction, 130) and the area of the plurality of closed cells (A, non-junction, 140) may be 1:2.5 to 10, preferably 1:2.5 to 7, more preferably Preferably, it is 1:2.5 to 4, preferably in terms of maintaining the pattern of the circular closed cell and durability of the closed cell layer.
  • the remaining cell layers (B, junction part, 130) except for the plurality of closed cells may be 1: 3 to 15, preferably 1: 4.5 to 13, more preferably 1: 4.5 to 10. , which is preferable in terms of maintaining the pattern of the rectangular closed cell and durability of the closed cell layer.
  • the effect of preventing deformation or damage of the sheet, and the effect of maintaining the shape of the closed cells can be increased.
  • the plurality of closed cells 120a may be included in the number of 10 to 1000 per 1 m 2 unit area of the flat cross-section of the cell layer 120 , and specifically may be 40 to 500 .
  • the number of such closed cells can be adjusted according to their size and shape, and is not limited to the above-described range.
  • the closed cell 120a provides cushioning of the seat 100 as predetermined air is sealed therein, and as the outer surface is formed to be curved, it is possible to visually feel the cushioning feeling.
  • the plurality of closed cells 120a may include the closed cell layers 120 formed at regular intervals due to the repetitively alternating arrangement of the junctions 130 and the non-junction parts 140 , and these closed cell layers 120 . ) can provide a sheet that can simultaneously implement the effect of preventing deformation or damage from external shocks or harsh external environmental conditions and maintaining the shape of a closed cell.
  • One surface of the cell layer 120 is formed by repeatedly arranging a plurality of closed cells 120a sealed with air.
  • the cell layer 120 includes a plurality of closed cells 121 formed in the non-junction portion 140 region, and a regular embossed region formed by alternating the flat junction portion 130 region in which the closed cells 121 are not formed. have a pattern
  • the embossed pattern may include a pattern width formed along the first direction; a pattern length formed along a second direction crossing the first direction; and a pattern height formed along a direction perpendicular to the first and second directions and perpendicular to the first resin film layer 121 .
  • each pattern width, pattern length, and/or pattern height of the embossed pattern is not particularly limited, and may be appropriately adjusted according to the intended use.
  • the width, length, and/or height of each pattern constituting the embossed pattern may be substantially the same.
  • the horizontal cross-sectional shape of the emboss pattern is not particularly limited, and may be, for example, a circular shape, a semicircle shape, a sector shape, or a polygonal shape of a triangle or more.
  • various pattern shapes known in the art may be applied without limitation.
  • the vertical cross-sectional shape of the embossed pattern formed on one surface of the cell layer 120 is not particularly limited, and may be, for example, a cylindrical shape, a hemispherical shape, or a polyhedral shape having a convex curved surface on at least one surface.
  • a predetermined separation distance is formed between any one of the plurality of closed cells 120a and any one of the other closed cells 120a adjacent thereto.
  • the separation distance is not particularly limited, and for example, may be formed to be equal to or smaller than any one of the above-described pattern width and pattern length.
  • the height of the cell layer 120 is not particularly limited, and for example, may be substantially the same as the pattern height of the plurality of closed cells 120a provided on one surface of the cell layer 120 .
  • the sheet 100 having a closed cell layer according to the present invention includes a printing unit 150 formed on at least one surface of the first resin film layer 121 and having a predetermined color or pattern.
  • the printing unit 150 implements various colors, patterns, and/or patterns, it is possible to increase readability compared to a conventional sheet and exhibit excellent discrimination.
  • the color, pattern, and/or pattern of the printing unit 150 is not particularly limited, and may be appropriately applied according to the intended use or the user's needs.
  • the printing unit 150 may be a colored type containing a conventional pigment in the art, or a type containing a predetermined pattern and color at the same time.
  • a position where the printing unit 150 is formed is not particularly limited.
  • it may be formed on the other surface of the first resin film layer 121 , formed on one surface of the first resin film layer 121 in contact with the cell layer 120 , or formed on both of them. have.
  • the size/area of the printed part 150 to be formed is not particularly limited, and may have substantially the same size/area as the first resin film layer 121 on a plane or smaller than this.
  • the printing unit 150 may be formed on at least one surface of the first resin film layer 121 , for example, on the whole of the other surface in a large area, or may be formed partially on a partial area.
  • the printing unit 150 may form a predetermined color, pattern and/or pattern through direct printing on the first resin film layer 121 and/or the second resin film layer 121, or The color and/or pattern may be formed by separately using the preformed printing layer 160 and laminating it on the first resin film layer 121 .
  • the printing unit 150 when the printing unit 150 is formed by printing directly on the first resin film layer 121 and/or the second resin film layer 121 , a conventional printing method known in the art may be used.
  • printing methods that can be used include Gravure Printing, Transfer Printing, Digital Printing, Offset Printing, Flexographic Printing ), screen printing, RISO Printing, or rotary screen printing.
  • the printing unit 150 may be formed in a large area on at least one surface of the first resin film layer 121 through the above-described printing method, for example, the entire other surface, or may be partially formed in a partial area of the other surface.
  • the printing unit 160 may be formed by laminating a printing layer 160 having a predetermined color and/or pattern formed on at least one surface, specifically, the other surface of the first resin film layer 121 .
  • a conventional adhesive layer known in the art for strengthening the adhesion between them may be further included.
  • the printing unit 150 may be formed using a printing release paper having a transfer pattern.
  • the method for manufacturing the sheet 100 having a closed cell layer according to the present invention is not particularly limited, and may be manufactured using a conventional sheet manufacturing apparatus known in the art.
  • the sheet manufacturing apparatus may use an apparatus including a hopper, an extrusion apparatus and a roller without limitation, wherein the roller is at least one of a forming roller, a pressure roller, a guide roller, and a support roller for manufacturing various shapes. can be provided.
  • temperature and pressure are not particularly limited, and may be appropriately adjusted within the usual ranges known in the art. For example, the temperature may be higher than the softening point of the resin constituting the film.
  • FIGS. 2 and 3 are schematic plan views showing various embodiments of the bonded portion 130 and the non-bonded portion 140 provided on one surface of the sheet 100 having a closed cell layer according to the present invention.
  • the planar shape of the non-junction part 140 may be a circular pattern.
  • the planar shape of the plurality of closed cells 120a formed in the non-junction portion 140 region in FIG. 3 may have a rectangular pattern.
  • the planar shape of the non-bonding portion 140 provided on one surface of the sheet 100 having a closed cell layer is specifically illustrated through FIGS. 2 and 3 .
  • the present invention is not limited thereto, and may be modified to have various shapes and sizes known in the art.
  • FIGS. 4 to 6 are schematic perspective views illustrating various embodiments of the bonded portion 130 and the non-bonded portion 140 provided on one surface of the sheet 100 having a closed cell layer according to the present invention.
  • each of the emboss patterns of 120a may have a cylindrical or hemispherical shape.
  • planar shape of the non-junction part 140 shown in FIG. 6 has a vertical cross-sectional shape of the non-junction part 140, specifically, a plurality of non-junction parts 140 formed in the region, compared to having a rectangular pattern shape as shown in FIG. 3 .
  • the embossed pattern of the closed cell 120a may have a polygonal shape having a convex curved surface.
  • the present invention by variously modifying the pattern shape of the non-junction part 140 and the closed cell 120a formed in the non-junction part 140 region, having a closed cell layer according to the present invention It may have the advantage of being widely applicable according to the purpose and purpose of use of the sheet 100 .
  • the closed cell 120a provided in the sheet 100 according to the present invention is configured due to the regular alternating arrangement of the junction part 130 and the non-junction part 140, and at this time, the shape and ratio of the closed cell 120a
  • the shapes of the joint portions 140 may be the same or different from each other.
  • the bonding portion 140 means a pattern of the bottom surface formed on one surface (eg, the upper portion) of the first resin film layer 121, that is, a planar shape
  • the closed cell 120a is the first resin film layer ( The pattern shape of the closed cell 120a in that one surface (upper part) of 121) and one surface of the second resin film layer 122 are partially bonded to mean a sealed part formed in the internal space between them 121 and 122
  • the planar shape of the non-junction portion 140 may be different from each other.
  • the cross-sectional shape of the closed cell 120a pattern formed in the non-junction portion 140 region is specifically illustrated through FIGS. 4 to 6 .
  • the present invention is not limited thereto, and may be modified to have various shapes and sizes known in the art.
  • FIG. 7 to 9 are cross-sectional views illustrating various embodiments of the printing unit 150 provided in the sheet 100 having a closed cell layer of the present invention.
  • FIG. 7 schematically shows another embodiment of a sheet with a closed cell layer according to the present invention.
  • the first a first printing unit 150 formed on a part of the other surface of the resin film layer 121; and a second printing unit 150 formed on a portion of the surface of the cell layer 120 in which a plurality of closed cells are formed.
  • the method of forming the second printing part 150 on the other surface of the second resin film layer 122 is not particularly limited, and the first printing part 150 is directly applied on the first resin film layer 121 described above. It can be carried out in the same way as the printing method.
  • conventional gravure printing, transfer printing, digital printing, offset printing, flexo printing, screen printing, litho (RISO) printing or rotary screen printing methods known in the art may be used.
  • the second printing unit 150 may be manufactured by laminating the second resin film layer 122 having a predetermined pattern, design, and pattern printed on one side with the first resin film layer 121 through the above-described printing process. Or, after laminating and bonding the non-printed first resin film layer 121 and the second resin film layer 122 to face each other, a portion of the non-bonding portion 140 region, that is, the second resin film layer 122 ) may be directly printed on the other surface (eg, upper outer surface) to form the second printing unit 150 . Considering the form stability and durability of the closed cell 120a, it is preferable to form the second printing part 150 by the former method.
  • FIG. 8 schematically shows another embodiment of a sheet having a closed cell layer according to the present invention.
  • the printing unit 150 Compared to the printing unit 150 shown in FIG. 1 that is formed on a part of the other surface of the first resin film layer 121, another embodiment of the printing unit 150 according to FIG. 8 is described with a closed cell layer ( 120) on one surface of the first resin film layer 121, that is, on one surface (inner side upper part) of the first resin film layer 121 laminated with the second resin film layer 121, the printing unit 150 is can be provided.
  • the printing unit 150 may be formed in a large area on the entire surface of the first resin film layer 121 or may be partially formed in a partial area.
  • the printing unit 150 when the printing unit 150 is formed on the inner surface of the first resin film layer 121 , that is, on the surface in contact with the second resin film layer 122 , printing is performed from external impact or harsh conditions. It is possible to protect the unit 150 , thereby improving the holding power of the printing unit 150 and product competitiveness.
  • a portion of the printed film interposed between the first resin film layer 121 and the second resin film layer 122 may be laminated in a predetermined arrangement to obtain an effect of showing a desired pattern or image.
  • the printing film refers to a film on which a predetermined color, image, and/or pattern is printed by the above-described printing method.
  • a plastic film commonly known in the art may be used without limitation, and specifically, it is preferable to use the same or different biodegradable polymer as the material constituting the first resin film layer 121 described above.
  • the printing film is starch, cellulose, chitin, PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ⁇ -caprolactone), PBAT (Polybutylene adipate terephthalate), PGA (polyglycolacid), AP (aliphaticpolyester) , PHBV (3-hydroxybutyrate-co 3-hydroxy valerate), PBS (Polybutylene Succinate), and may include one or more selected from the group consisting of combinations thereof.
  • the printing film is made of a mixture of PLA (polylactide) and PBAT (Polybutylene adipate terephthalate). It has the advantage of improving durability and thermal and mechanical properties while maintaining the biodegradability of the sheet.
  • FIG. 9 schematically shows another embodiment of a sheet having a closed cell layer according to the present invention.
  • the printing unit 150 includes a printing layer ( 160) may be formed by laminating.
  • the printing unit 150 may be directly formed on the other surface of the first resin film layer 121 through a printing method, or may be formed by laminating a separate printing layer 160 .
  • a predetermined image can be separately printed on the printing layer 160 . Therefore, it is possible to increase the refinement and resolution of the image.
  • the printing layer 160 is additionally stacked, it is possible to prevent sheet damage from external impacts or harsh external environments, and to further increase durability.
  • the printing layer 160 is not particularly limited, and for example, refers to a film or sheet printed with a specific image.
  • a plastic film or sheet commonly known in the art can be used without limitation, and specifically, the same or different biodegradable polymer as the material constituting the above-described first resin film layer 121 is used. it is preferable
  • the printing layer 160 may include starch, cellulose, chitin, PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ⁇ -caprolactone), PBAT (polybutylene adipate terephthalate), PGA (polyglycolacid), AP (aliphaticpolyester), PHBV (3-hydroxybutyrate-co 3-hydroxy valerate)), PBS (Polybutylene Succinate), and may include one or more selected from the group consisting of combinations thereof.
  • the printing layer 160 is made of a mixture of polylactide (PLA) and polybutylene adipate terephthalate (PBAT). .
  • the above-described sheet having a closed cell layer of the present invention and a modification thereof are provided with a plurality of closed cells formed on an eco-friendly resin film, and a printing unit on which a predetermined image is printed, so that under impact from the outside or under severe environmental conditions. It is possible to increase the durability of the sheet and maintain the shape of the closed cell by preventing the resulting deformation or damage, and at the same time, high readability, discrimination, and eco-friendliness can be secured at the same time.
  • the sheet having a closed cell layer according to the present invention can be applied without limitation to all technical fields in which the sheet is used in the art.
  • a conventional sheet manufacturing apparatus having a hopper, an extrusion apparatus, and at least one roller was used, and in this case, a forming roller having a semicircular shape was applied as a roller for forming the closed cell layer.
  • the biodegradable resin constituting the first resin film layer and the second resin film layer 90 wt% of PBAT and 9 wt% of PLA are used, and 0.5 wt% of a lubricant (Montan wax) as an additive, a primary antioxidant (Phenol-based) 0.3% by weight, and a secondary antioxidant (Phosphite-based) 0.2% by weight was mixed to prepare a biodegradable resin raw material.
  • the prepared biodegradable resin raw material was inserted into the hopper of the sheet manufacturing apparatus, and then the first resin film and the second resin film were extruded by a T-die, respectively.
  • the extruded second resin film was compressed on a molding roller having a closed semicircular shape as shown in FIG.
  • the first resin film was compressed on a flat roller without a shape. Thereafter, one surface of the second resin film and one surface of the first resin film were matched to each other to face each other, and then bonded to form a closed cell layer on the first resin film.
  • the forming roller was adjusted so that the area ratio of the joined part (flat part) and the non-bonded part (closed semicircular shape) was 1: 4 based on the unit area of 1 m 2 of the flat cross-section to form a semicircular closed cell layer.
  • the film having the closed cell layer was wound in a roll shape through a transfer roller while cooling to prepare a sheet having a closed cell layer. And a printed part was formed by digitally printing an arbitrary shape on the upper surface of the first resin film layer and the lower surface of the second resin film layer of the prepared sheet having a closed cell layer.
  • the sheet having the closed cell layer of Example 1 prepared as described above had a biodegradability of 98% measured according to KS M ISO 14855-1 standard.
  • a forming roller having a closed square column shape as shown in FIG. 3 is applied instead of a closed semicircular forming roller, and the forming roller is a junction (flat part) and a non-junction part (closed)
  • a sheet having a closed cell layer of Example 2 was prepared in the same manner as in Example 1, except that the area ratio of the rectangular columnar shape) was adjusted to be 1:7 and compressed.
  • the sheet having the closed cell layer of Example 2 prepared as described above had a biodegradability of 98% measured according to the KS M ISO 14855-1 standard.
  • the area ratio of the joined (flat) and non-joined (closed semicircular) parts are adjusted to be 1:17 based on a unit area of 1 m2 of a flat cross-section, except for compression was carried out under the same conditions as in Example 1 to prepare a sheet having a closed cell layer of Comparative Example 1.
  • the area ratio of the joined (flat) and non-joined (closed semicircular) parts are adjusted to be 1: 0.5 based on a unit area of 1 m2 of a flat section, except for compression was carried out under the same conditions as in Example 1 to prepare a sheet having a closed cell layer of Comparative Example 2.
  • the degree of damage was evaluated according to the number of damaged closed cells by visual identification based on an area of 1 m 2 .
  • the criteria for determining the degree of damage are as follows.
  • Example 1 Example 2 Comparative Example 1 Comparative Example 2 closed cell morphology Great Great error Great external shock absorption Great Great error error
  • the sheet having the closed cell layer prepared according to Examples 1 and 2 could obtain the desired effect in the present invention because the closed cell pattern was maintained and the durability was excellent.
  • the closed cell shape was not maintained, so it was fundamentally impossible to manufacture a sheet having a closed cell layer.
  • the sheet according to Comparative Example 2 had less than 10 closed cells formed on the sheet per unit area of 1 m 2 of flat cross-section, so it was substantially similar to a general film to which a double layered resin layer was bonded. .
  • Specimens were prepared using the film fabric (thickness 48 ⁇ m, 2 layers) prepared from the biodegradable resin raw material according to Examples 1 and 2. The physical properties of each specimen were evaluated in the following manner, and the results are shown in Table 2 below.
  • Elongation recovery rate measured according to KS K 0642 8.16.2.D method.
  • Oxygen permeability It was measured according to ASTM D 3985 method, and the test conditions were performed at 23.0 ⁇ 1 °C.
  • the sheets having a closed cell layer prepared in Examples 1 and 2 satisfy the physical property level of the sheet required in the field to which the present invention belongs at an equivalent level or higher, so that the It was found that deformation or damage can be prevented even in harsh external environmental conditions, and shape maintenance of a closed cell can be implemented, and a specific image can be distinguished by printing, and it can have eco-friendly advantages.

Landscapes

  • Laminated Bodies (AREA)

Abstract

The present invention relates to a sheet having a closed cell layer. More specifically, provided is an eco-friendly sheet comprising: a plurality of closed cells formed on an eco-friendly resin film; and a printed part on which a predetermined image is printed. The sheet according to the present invention is prevented from deformation or damage from external impact or harsh external environmental conditions, and thus the durability of the sheet and the shape-retaining properties of the closed cells can be continuously maintained. Moreover, the sheet can be made recognizable by printing a specific image, and can have the advantage of being environmentally friendly.

Description

폐쇄형 셀층을 갖는 시트Sheets with closed cell layers
본 발명은 폐쇄형 셀층을 갖는 친환경 시트에 관한 것이다. The present invention relates to an eco-friendly sheet having a closed cell layer.
종래 시트는 소위 버블(bubble) 플라스틱 재료를 형성하기 위해, 함께 적층된 두 개의 플라스틱 시트층으로 구성된다. 이러한 버블 형상은 하나의 시트 상에 진공 성형되는데, 이는 실질적으로 평평한 시트에 적층되어 두 층 사이에 밀봉된 버블을 형성하게 된다. 상기 버블은 일반적으로 원형, 원통형 형상을 가지게 되며, 그 외에 육각형, 다이아몬드 형상, 부분 구형상의 버블도 알려져 있다.Conventional sheets consist of two layers of plastic sheets laminated together to form a so-called bubble plastic material. These bubble shapes are vacuum formed onto one sheet, which is laminated to a substantially flat sheet to form a sealed bubble between the two layers. The bubble generally has a circular or cylindrical shape, and in addition, hexagonal, diamond-shaped, and partially spherical bubbles are also known.
일례로, 미국등록특허 제4,869,939호는 인접한 셀들이 중간 통로를 통해 서로 유동적인 구조를 갖는 셀 배열을 포함하는 에어버블 셀 시트를 개시하고 있다. 또한 일본공개특허 제2003-2377842호는 중간 연결 통로에 의해 그룹으로 연결된 에어셀을 갖는 시트를 개시하고 있다. For example, U.S. Patent No. 4,869,939 discloses an air bubble cell sheet including a cell arrangement in which adjacent cells have a fluid structure with each other through an intermediate passage. Also, Japanese Laid-Open Patent Publication No. 2003-2377842 discloses a sheet having air cells connected in groups by an intermediate connecting passage.
그러나 전술한 시트들은 외부로부터의 충격이나 가혹한 외부 환경 조건 하에서 초래되는 변형 및/또는 파손 방지 효과가 만족스럽지 못할 뿐만 아니라 에어셀의 형태 유지나 내구성 면에서도 미흡하다. 또한 일반적인 플라스틱 재료를 사용함에 따라 환경에 악영향을 미칠 수 있으며, 식별력 면에서도 한계가 있었다. However, the above-described sheets are not only unsatisfactory in preventing deformation and/or damage caused by external shocks or harsh external environmental conditions, but are also insufficient in maintaining the shape or durability of the air cell. In addition, as a general plastic material is used, it may adversely affect the environment, and there is a limit in terms of discrimination.
본 발명이 이루고자 하는 기술적 과제는, 외부로부터의 충격이나 가혹한 외부 환경 조건하에서 변형이나 파손 등을 방지하여 시트의 내구성 및 폐쇄형 셀의 형태 유지성을 향상시킬 수 있을 뿐만 아니라, 특정 이미지를 인쇄하여 식별력을 가질 수 있고, 친환경성을 발휘할 수 있는 폐쇄형 셀층을 갖는 시트를 제공하는 것이다. The technical problem to be achieved by the present invention is that it is possible to improve the durability of the sheet and maintain the shape of the closed cell by preventing deformation or breakage under external impact or harsh external environmental conditions, as well as improving the identification ability by printing a specific image. It is to provide a sheet having a closed cell layer that can have and can exhibit eco-friendliness.
본 발명의 다른 목적 및 이점은 하기 발명의 상세한 설명 및 청구범위에 의해 보다 명확하게 설명될 수 있다.Other objects and advantages of the present invention may be more clearly explained by the following detailed description and claims.
상기한 기술적 과제를 달성하기 위해, 본 발명은 제1 수지 필름층; 상기 제1 수지 필름층의 일면에 형성되고, 소정 간격으로 이격된 복수의 폐쇄형 셀을 포함하는 셀층; 및 상기 제1 수지 필름층의 적어도 일면에 형성되고, 소정의 색상 또는 무늬를 갖는 인쇄부;를 포함하며, 당해 셀층의 평단면 1㎡ 면적을 기준으로, 상기 복수의 폐쇄형 셀(A)의 총 면적은 상기 폐쇄형 셀을 제외한 나머지 셀층(B)의 총 면적보다 큰 것인, 폐쇄형 셀층을 갖는 시트를 제공한다. In order to achieve the above technical problem, the present invention is a first resin film layer; a cell layer formed on one surface of the first resin film layer and including a plurality of closed cells spaced apart from each other at a predetermined interval; and a printing part formed on at least one surface of the first resin film layer and having a predetermined color or pattern, wherein the plurality of closed cells (A) are The total area is greater than the total area of the remaining cell layers (B) excluding the closed cells, to provide a sheet having a closed cell layer.
본 발명의 일 실시예를 들면, 상기 복수의 폐쇄형 셀(A)의 총 면적과, 상기 복수의 폐쇄형 셀을 제외한 나머지 셀층(B)의 총 면적 간의 비율은 2 내지 15 : 1 일 수 있다. For one embodiment of the present invention, the ratio between the total area of the plurality of closed cells (A) and the total area of the remaining cell layers (B) except for the plurality of closed cells may be 2 to 15:1. .
본 발명의 일 실시예를 들면, 상기 셀층은, 상기 제1 수지 필름층의 일면 상에 제2 수지 필름층의 일면이 합지되어 융착된 접합부; 및 상기 제1 수지 필름층과 상기 제2 수지 필름층이 비융착되어 이들 사이에 공기로 밀봉된 폐쇄형 셀이 형성된 비(非)접합부;를 포함할 수 있다. For one embodiment of the present invention, the cell layer may include: a junction in which one surface of the second resin film layer is laminated on one surface of the first resin film layer and fused; and a non-bonding portion in which the first resin film layer and the second resin film layer are not fused to form a closed cell sealed with air therebetween.
본 발명의 일 실시예를 들면, 상기 셀층은, 복수의 폐쇄형 셀이 반복 배열하여 형성된 소정의 양각 패턴을 포함할 수 있다. For an embodiment of the present invention, the cell layer may include a predetermined embossed pattern formed by repeatedly arranging a plurality of closed cells.
본 발명의 일 실시예를 들면, 상기 양각 패턴의 수평 단면 형상은 원형, 반원형, 부채꼴형 및 다각형으로 이루어진 군에서 선택될 수 있다. For an embodiment of the present invention, the horizontal cross-sectional shape of the embossed pattern may be selected from the group consisting of a circle, a semicircle, a sector shape, and a polygon.
본 발명의 일 실시예를 들면, 상기 제1 수지 필름층 및 셀층 중 적어도 하나는 생분해성 고분자를 포함할 수 있다. In one embodiment of the present invention, at least one of the first resin film layer and the cell layer may include a biodegradable polymer.
본 발명의 일 실시예를 들면, 상기 생분해성 고분자는 전분, 셀룰로오스, 키틴, PLA(polylactide), PHA(polyhydroxyalkanoates), PCL(poly ε-caprolactone), PBAT(Polybutylene adipate terephthalate), PGA(polyglycolacid), AP(aliphaticpolyester), PHBV(P(3-hydroxybutyrate-co 3-hydroxy valerate)), 및 PBS(Polybutylene Succinate)로 이루어진 군에서 선택되는 1종 이상을 포함할 수 있다. In one embodiment of the present invention, the biodegradable polymer is starch, cellulose, chitin, PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ε-caprolactone), PBAT (Polybutylene adipate terephthalate), PGA (polyglycolacid), It may include at least one selected from the group consisting of aliphatic polyester (AP), 3-hydroxybutyrate-co 3-hydroxy valerate (P (P)), and polybutylene succinate (PBS).
본 발명의 일 실시예를 들면, 상기 인쇄부는, 상기 제1 수지 필름층의 타면 상에 형성되거나, 상기 셀층과 접촉하는 상기 제1 수지 필름층의 일면 상에 형성되거나, 또는 이들 모두에 형성될 수 있다. For one embodiment of the present invention, the printing unit is formed on the other surface of the first resin film layer, is formed on one surface of the first resin film layer in contact with the cell layer, or to be formed on both can
본 발명의 일 실시예를 들면, 상기 인쇄부는, 상기 제1 수지 필름층의 타면 상에 소정의 색상 또는 무늬가 인쇄된 프린팅층을 적층하여 형성될 수 있다. For example, the printing unit may be formed by laminating a printing layer in which a predetermined color or pattern is printed on the other surface of the first resin film layer.
본 발명의 일 실시예를 들면, 상기 프린팅층은 전분, 셀룰로오스, 키틴, PLA(polylactide), PHA(polyhydroxyalkanoates), PCL(poly ε-caprolactone), PBAT(Polybutylene adipate terephthalate), PGA(polyglycolacid), AP(aliphaticpolyester), PHBV(P(3-hydroxybutyrate-co 3-hydroxy valerate)), PBS(Polybutylene Succinate) 및 이들의 조합으로 이루어진 군에서 선택되는 1종 이상의 생분해성 고분자를 포함할 수 있다. In one embodiment of the present invention, the printing layer is starch, cellulose, chitin, PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ε-caprolactone), PBAT (Polybutylene adipate terephthalate), PGA (polyglycolacid), AP (aliphaticpolyester), PHBV (3-hydroxybutyrate-co 3-hydroxy valerate)), PBS (Polybutylene Succinate), and may include one or more biodegradable polymers selected from the group consisting of combinations thereof.
본 발명의 일 실시예에 따른 폐쇄형 셀층을 갖는 시트는, 외부로부터의 충격이나 가혹한 외부 환경조건에서 변형이나 파손 등을 방지하여 시트 내구성 및 폐쇄형 셀의 형태 유지성을 구현할 수 있을 뿐만 아니라, 특정 이미지를 인쇄하여 식별력을 가질 수 있고, 친환경적인 장점을 가질 수 있다.The sheet having a closed cell layer according to an embodiment of the present invention can prevent deformation or damage from external impact or harsh external environmental conditions, thereby implementing sheet durability and maintaining the shape of the closed cell, as well as By printing an image, it can be distinguished, and it can have an eco-friendly advantage.
본 발명에 따른 효과는 이상에서 예시된 내용에 의해 제한되지 않으며, 보다 다양한 효과들이 본 명세서 내에 포함되어 있다. Effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.
도 1은 본 발명의 일 실시예에 따른 폐쇄형 셀층을 갖는 시트의 단면도이다.1 is a cross-sectional view of a sheet having a closed cell layer according to an embodiment of the present invention.
도 2 및 도 3은 본 발명에 따른 폐쇄형 셀층을 갖는 시트에 구비되는 접합부(130)와 비접합부(140)의 다양한 실시형태를 나타내는 평면 모식도이다. 2 and 3 are schematic plan views showing various embodiments of the bonded portion 130 and the non-bonded portion 140 provided in the sheet having a closed cell layer according to the present invention.
도 4 내지 도 6은 본 발명의 일 실시예에 따른 폐쇄형 셀층을 갖는 시트에 구비되는 접합부(130)와 비접합부(140)의 다양한 실시형태를 나타내는 사시도이다. 4 to 6 are perspective views illustrating various embodiments of the bonded portion 130 and the non-bonded portion 140 provided in the sheet having a closed cell layer according to an embodiment of the present invention.
도 7 내지 도 9는 본 발명의 폐쇄형 셀층을 갖는 시트에 구비되는 인쇄부의 다양한 실시형태를 나타내는 단면도이다.7 to 9 are cross-sectional views illustrating various embodiments of a printing unit provided in a sheet having a closed cell layer according to the present invention.
<부호의 설명><Explanation of code>
100: 폐쇄형 셀층을 갖는 시트 100: sheet having a closed cell layer
120: 폐쇄형 셀층120: closed cell layer
120a: 폐쇄형 셀120a: closed cell
121: 제1 수지 필름층121: first resin film layer
122: 제2 수지 필름층122: second resin film layer
130: 접합부130: junction
140: 비접합부140: non-junction
150: 인쇄부150: printing unit
160: 프린팅층160: printing layer
이하 첨부한 도면을 참조하여 본 발명의 바람직한 실시예에 대한 구성 및 작용을 상세히 설명하면 다음과 같다.Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
여기서, 각 도면의 구성요소들에 대해 참조부호를 부가함에 있어서 동일한 구성요소들에 한해서는 비록 다른 도면상에 표시되더라도 가능한 한 동일한 부호로 표기되었음에 유의하여야 한다.Here, in adding reference numerals to the components of each drawing, it should be noted that only the same components are marked with the same reference numerals as much as possible even though they are displayed on different drawings.
또한 본문에 개시되어 있는 본 발명의 실시예들에 대해서, 특정한 구조적 내지 기능적 설명들은 단지 본 발명의 실시예를 설명하기 위한 목적으로 예시된 것으로, 본 발명의 실시예들은 다양한 형태로 실시될 수 있으며 본문에 설명된 실시예들에 한정되는 것으로 해석되어서는 아니 된다.In addition, for the embodiments of the present invention disclosed in the text, specific structural or functional descriptions are only exemplified for the purpose of describing the embodiments of the present invention, and the embodiments of the present invention may be implemented in various forms and It should not be construed as being limited to the embodiments described herein.
본 발명은 다양한 변경을 가할 수 있고 여러 가지 형태를 가질 수 있는 바, 특정 실시예들을 도면에 예시하고 본문에 설명하고자 한다. 그러나 이는 본 발명을 특정한 개시 형태에 대해 한정하려는 것이 아니며, 본 발명의 사상 및 기술 범위에 포함되는 모든 변경, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다. 각 도면을 설명하면서 유사한 참조부호를 구성요소에 대해 사용하였다.Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals are used for components.
본 명세서에서, 제1, 제2 등의 용어는 다양한 구성요소들을 설명하는데 사용될 수 있지만, 상기 구성요소들은 상기 용어들에 의해 한정되어서는 안된다. 상기 용어들은 하나의 구성요소를 다른 구성요소로부터 구별하는 목적으로만 사용된다. 예를 들어, 본 발명의 권리 범위로부터 이탈되지 않은 채 제1 구성요소는 제2 구성요소로 명명될 수 있고, 유사하게 제2 구성요소도 제1 구성요소로 명명될 수 있다.In this specification, terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.
또한 명세서 전체에서, 어떤 부분이 어떤 구성요소를 "포함" 한다고 할 때, 이는 특별히 반대되는 기재가 없는 한, 다른 구성요소를 제외하는 것이 아니라 다른 구성요소를 더 포함할 수 있는 것을 의미한다. 또한, 명세서 전체에서, "위에" 또는 "상에"라 함은 대상 부분의 위 또는 아래에 위치하는 경우 뿐만 아니라 그 중간에 또 다른 부분이 있는 경우도 포함함을 의미하는 것이며, 반드시 중력 방향을 기준으로 위쪽에 위치하는 것을 의미하는 것은 아니다. 그리고, 본원 명세서 전체에서, "평면상"이라 할 때, 이는 대상 부분을 위에서 보았을 때를 의미하며, "단면상"이라 할 때, 이는 대상 부분을 수직으로 자른 단면을 옆에서 보았을 때를 의미한다.In addition, throughout the specification, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless specifically stated to the contrary. In addition, throughout the specification, "on" or "on" means that it includes not only the case located above or below the target part, but also the case where there is another part in the middle, and the direction of gravity must be It does not mean that it is positioned above the reference. And, throughout the present specification, when referred to as "planar view", it means when the target portion is viewed from above, and when referred to as "cross-section", it means when viewed from the side when the cross-section of the object portion is vertically cut.
다르게 정의되지 않는 한, 기술적이거나 과학적인 용어를 포함해서 여기서 사용되는 모든 용어들은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 일반적으로 이해되는 것과 동일한 의미를 가지고 있다. 일반적으로 사용되는 사전에 정의되어 있는 것과 같은 용어들은 관련 기술의 문맥 상 가지는 의미와 일치하는 의미를 가지는 것으로 해석되어야 하며, 본 출원에서 명백하게 정의하지 않는 한, 이상적이거나 과도하게 형식적인 의미로 해석되지 않는다.Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not
이하, 첨부한 도면들을 참조하여, 본 발명의 바람직한 실시예를 보다 설명하고자 한다. 도면상의 동일한 구성요소에 대해서는 동일한 참조부호를 사용하고 동일한 구성요소에 대해서 중복된 설명은 생략한다.Hereinafter, preferred embodiments of the present invention will be further described with reference to the accompanying drawings. The same reference numerals are used for the same components in the drawings, and repeated descriptions of the same components are omitted.
도 1은 본 발명에 따른 폐쇄형 셀층을 갖는 시트의 일 실시예를 대략적으로 도시한 단면 구조도이다.1 is a cross-sectional structural diagram schematically showing an embodiment of a sheet having a closed cell layer according to the present invention.
상기 도 1을 참조하여 설명하면, 본 발명의 일 실시예에 따른 폐쇄형 셀층을 갖는 시트(100)는, 제1 수지 필름층(121); 및 상기 제1 수지 필름층(121)의 일면에 형성되고, 소정 간격으로 이격된 복수의 폐쇄형 셀(120a)을 포함하는 셀층(120); 및 상기 제1 수지 필름층(121)의 적어도 일면에 형성되고, 소정의 색상 또는 무늬를 갖는 인쇄부(150)를 포함한다. Referring to FIG. 1 , the sheet 100 having a closed cell layer according to an embodiment of the present invention includes a first resin film layer 121 ; and a cell layer 120 formed on one surface of the first resin film layer 121 and including a plurality of closed cells 120a spaced apart from each other at predetermined intervals; and a printing unit 150 formed on at least one surface of the first resin film layer 121 and having a predetermined color or pattern.
여기서, 상기 셀층(120)은 복수의 폐쇄형 셀(Closed cell) 형성부(A)와, 폐쇄형 셀 비(非)형성부(B)를 포함하되, 이들 간의 면적 비율을 소정 범위로 조절함으로써 시트의 내구성 및 폐쇄형 셀의 형태 유지성을 향상시킬 수 있다는 점에서, 종래 시트와 차별화된다. Here, the cell layer 120 includes a plurality of closed cell forming portions (A) and closed cell non-forming portions (B), but by adjusting the area ratio between them to a predetermined range It is differentiated from the conventional sheet in that the durability of the sheet and the shape retention of the closed cell can be improved.
또한 제1 수지 필름층(121) 및/또는 셀층(120)은 생분해성 고분자로 구성되어 친환경성을 나타낼 수 있으며, 인쇄부(150)를 포함하여 가독성과 식별력을 높일 수 있다In addition, the first resin film layer 121 and/or the cell layer 120 may be composed of a biodegradable polymer to represent eco-friendliness, and may include a print unit 150 to increase readability and discrimination.
이하, 폐쇄형 셀층을 갖는 시트(100)의 각 구성에 대하여 구체적으로 살펴보면 다음과 같다.Hereinafter, each configuration of the sheet 100 having a closed cell layer will be described in detail as follows.
제1 수지 필름층first resin film layer
본 발명에 따른 폐쇄형 셀층을 갖는 시트(100)에서, 제1 수지 필름층(121)은 복수의 폐쇄형 셀(120a)을 지지하고 보호하는 역할을 한다. 또한 후술되는 인쇄부(150)를 형성하기 위한 코팅 기재 또는 기재 필름으로 사용될 수 있다. In the sheet 100 having a closed cell layer according to the present invention, the first resin film layer 121 serves to support and protect the plurality of closed cells 120a. In addition, it may be used as a coating substrate or a substrate film for forming the printing part 150 to be described later.
상기 제1 수지 필름층(121)은 특별히 제한되지 않으며, 당 분야에서 통상적으로 알려진 플라스틱 필름을 제한 없이 사용할 수 있다. 친환경성을 고려하여, 상기 제1 수지 필름층(121)은 당 분야에 공지된 통상의 생분해성 고분자로 구성되는 것이 바람직하다.The first resin film layer 121 is not particularly limited, and a plastic film commonly known in the art may be used without limitation. In consideration of environmental friendliness, the first resin film layer 121 is preferably composed of a conventional biodegradable polymer known in the art.
본 발명에서, 생분해성 고분자는 빛, 열 및 수분 등의 환경 조건하에서 화학구조가 현저히 변화하고, 그 물질 변화가 측정되는 고분자로서, 생붕괴 고분자(Disintegrable Polymer), 생분해 고분자(Biodegradable Polymer) 등을 포함하는 개념이다. 구체적으로, 생분해성 고분자(또는 생분해성 플라스틱)는 토양 매립시 100%가 자연적으로 분해되는 플라스틱이므로, 종래 소수성 플라스틱과는 달리 토양 매립에 따른 환경부하가 없어 친환경적이다. 이러한 생분해성 고분자의 생분해도는 특별히 제한되지 않는다. 일례로, 생분해도가 80% 이상일 수 있으며, 구체적으로 80 내지 100%일 수 있다. 여기서, 생분해도는 KS M ISO 14855-1 규격을 기준으로 할 수 있다. In the present invention, the biodegradable polymer is a polymer whose chemical structure is remarkably changed under environmental conditions such as light, heat and moisture and whose material change is measured, a biodegradable polymer, a biodegradable polymer, etc. concept that includes Specifically, since biodegradable polymers (or biodegradable plastics) are plastics that are 100% naturally decomposed during landfilling, unlike conventional hydrophobic plastics, there is no environmental load due to landfilling, so it is eco-friendly. The degree of biodegradation of these biodegradable polymers is not particularly limited. As an example, the degree of biodegradation may be 80% or more, specifically, it may be 80 to 100%. Here, the biodegradability may be based on the KS M ISO 14855-1 standard.
일반적으로 생분해성 고분자는 천연 고분자계, 합성 고분자계, 미생물 생산 고분자 및 천연물 고분자와 합성고분자의 블렌드(Blend)로 분류될 수 있다. 사용 가능한 천연 고분자계 생분해성 고분자의 비제한적인 예로는 곡물에서 추출되는 녹말(전분, starch), 게나 새우의 껍질에서 얻을 수 있는 키틴(chitin), 셀룰로오스(Cellulose), 또는 이들의 조합 등이 있다. 이러한 천연 고분자계 생분해성 고분자는 합성계 생분해성 고분자에 비해 가공성은 떨어지지만, 가격이 상대적으로 저렴하다. 특히 전분은 가격이 저렴하고 가공성을 향상시킬 수 있는 다양한 변성 기술을 이용할 수 있다. In general, biodegradable polymers can be classified into natural polymers, synthetic polymers, microorganisms produced polymers, and blends of natural polymers and synthetic polymers. Non-limiting examples of natural polymer-based biodegradable polymers that can be used include starch extracted from grains, chitin obtained from crab or shrimp shells, cellulose, or a combination thereof. . These natural polymer-based biodegradable polymers have lower processability than synthetic biodegradable polymers, but are relatively inexpensive. In particular, starch is inexpensive and various denaturation techniques can be used to improve processability.
또한 화학합성에 의한 합성계 생분해성 고분자의 비제한적인 예로는, PLA(polylactide), PHA(polyhydroxyalkanoates), PCL(poly ε-caprolactone), PBAT(Polybutylene adipate terephthalate), PGA(polyglycolacid), AP(aliphaticpolyester), PHBV(P(3-hydroxybutyrate-co 3-hydroxy valerate)), PBS(Polybutylene Succinate) 또는 이들의 조합 등이 있다. 이러한 합성계 생분해성 고분자는 생산이 비교적 수월하고, 물성 조절이 용이하여 다양한 기능을 부여할 수 있다. In addition, non-limiting examples of synthetic biodegradable polymers by chemical synthesis include PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ε-caprolactone), PBAT (Polybutylene adipate terephthalate), PGA (polyglycolacid), AP (aliphaticpolyester) , PHBV (3-hydroxybutyrate-co 3-hydroxy valerate), PBS (Polybutylene Succinate), or a combination thereof. These synthetic biodegradable polymers are relatively easy to produce and can provide various functions because physical properties can be easily controlled.
그리고 전술한 천연계와 합성계 생분해성 고분자를 혼용할 수 있다. 이 경우 생분해성이 우수한 전분과 합성계 고분자와 블렌딩(blending)하여 생분해도를 향상시키고 비용을 절감할 수 있다. 일례로, 전분과 PLA, 전분과 PCL, 전분과 지방족 폴리에스터 등을 혼용할 수 있으며, 이때 이들의 혼합 비율은 적절히 조절할 수 있다. 일 구체예를 들면, 상기 제1 수지 필름층(121)은 PLA(polylactide) 및 PBAT(Polybutylene adipate terephthalate)의 혼합으로 이루어지는 것이 시트의 생분해성을 유지하면서도 내구성 및 열적 기계적 특성을 향상시킬 수 있는 장점을 가진다.And the above-described natural and synthetic biodegradable polymers can be mixed. In this case, it is possible to improve the biodegradability and reduce the cost by blending with a starch having excellent biodegradability and a synthetic polymer. For example, starch and PLA, starch and PCL, starch and aliphatic polyester, etc. may be mixed, and the mixing ratio thereof may be appropriately adjusted. For example, when the first resin film layer 121 is made of a mixture of PLA (polylactide) and PBAT (Polybutylene adipate terephthalate), durability and thermal and mechanical properties can be improved while maintaining the biodegradability of the sheet. have
상기 제1 수지 필름층(121)의 두께는 특별히 제한되지 않으며, 당 분야에서 사용되는 통상의 두께 범위 내에서 적절히 조절할 수 있다. The thickness of the first resin film layer 121 is not particularly limited, and may be appropriately adjusted within a typical thickness range used in the art.
셀층cell layer
본 발명에 따른 폐쇄형 셀층을 갖는 시트(100)에서, 셀층(120)은 제1 수지 필름층(121)의 일면 상에 형성되며, 소정 간격으로 이격된 복수의 폐쇄형 셀(120a)을 포함한다. In the sheet 100 having a closed cell layer according to the present invention, the cell layer 120 is formed on one surface of the first resin film layer 121, and includes a plurality of closed cells 120a spaced apart from each other at predetermined intervals. do.
일 구체예를 들면, 상기 셀층(120)은 대향 배치되는 제1 수지 필름층(121) 일면의 적어도 일부와 제2 수지 필름층(122) 일면의 적어도 일부가 합지되어 형성된 접합부(130)와 이들(121, 122)이 부분적으로 비접합하여 분리된 비접합부(140)를 포함한다. 보다 구체적으로, 상기 접합부(130)는 제1 수지 필름층(121)의 일면 상에 제2 수지 필름층(122)의 일면이 합지되어 밀착된 평탄부(flat)를 의미한다. 또한 비접합부(140)는 제1 수지 필름층(121)과 제2 수지 필름층(122)이 부분적으로 비(非)융착되어 이들 사이의 내부 공간에 소정의 공기가 충전된 볼록부를 의미한다. 이러한 비접합부(140)에는 소정의 공기로 밀봉된 폐쇄형 셀(120a)이 형성된다. For example, the cell layer 120 is a bonding portion 130 formed by laminating at least a portion of one surface of the first resin film layer 121 and at least a portion of one surface of the second resin film layer 122 that are disposed to face each other. (121, 122) includes a non-bonding portion 140 separated by partially non-bonding. More specifically, the bonding portion 130 refers to a flat portion in which one surface of the second resin film layer 122 is laminated on one surface of the first resin film layer 121 and adhered thereto. In addition, the non-bonding portion 140 refers to a convex portion in which the first resin film layer 121 and the second resin film layer 122 are partially non-fused, and a predetermined air is filled in an internal space therebetween. A closed cell 120a sealed with a predetermined air is formed in the non-junction portion 140 .
상기 셀층(120)을 형성하는 제2 수지 필름층(122)은 당 분야에서 통상적으로 알려진 플라스틱 필름을 제한 없이 사용할 수 있으며, 구체적으로 전술한 제1 수지 필름층(121)을 구성하는 재료와 동일하거나 상이한 생분해성 고분자를 사용하는 것이 바람직하다.For the second resin film layer 122 forming the cell layer 120, a plastic film commonly known in the art may be used without limitation, and specifically the same as the material constituting the first resin film layer 121 described above. Or it is preferable to use a different biodegradable polymer.
일 구체예를 들면, 상기 제2 수지 필름층(122)은 서로 동일하거나 또는 상이하며, 각각 독립적으로 전분, 셀룰로오스, 키틴, PLA(polylactide), PHA(polyhydroxyalkanoates), PCL(poly ε-caprolactone), PBAT(Polybutylene adipate terephthalate), PGA(polyglycolacid), AP(aliphaticpolyester), PHBV(P(3-hydroxybutyrate-co 3-hydroxy valerate)), PBS(Polybutylene Succinate) 및 이들의 조합으로 이루어진 군에서 선택되는 1종 이상을 포함할 수 있다. 바람직한 일 구체예를 들면, 상기 제2 수지 필름층(122)은 PLA(polylactide) 및 PBAT(Polybutylene adipate terephthalate)의 혼합으로 이루어지는 것이 시트의 생분해성을 유지하면서도 내구성 및 열적 기계적 특성을 향상시킬 수 있는 장점을 가진다. For example, the second resin film layer 122 is the same as or different from each other, and each independently starch, cellulose, chitin, PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ε-caprolactone), One selected from the group consisting of PBAT (Polybutylene adipate terephthalate), PGA (polyglycolacid), AP (aliphaticpolyester), PHBV (P (3-hydroxybutyrate-co 3-hydroxy valerate)), PBS (Polybutylene Succinate), and combinations thereof may include more than one. In a preferred embodiment, the second resin film layer 122 is made of a mixture of polylactide (PLA) and polybutylene adipate terephthalate (PBAT), which can improve durability and thermal and mechanical properties while maintaining the biodegradability of the sheet. have an advantage
평탄부인 접합부(130)와 볼록부인 비접합부(140)는 교대로 반복 배열되되, 이들은 일정 간격에 따라 이격 배치될 수 있다. 이 경우, 외부 충격이나 가혹한 외부 환경 조건 하에서 접합부(130)와 비접합부(140)의 형태를 지속적으로 유지할 수 있다는 점에서 바람직하다. The junction part 130 which is a flat part and the non-junction part 140 which is a convex part are alternately and repeatedly arranged, and they may be spaced apart according to a predetermined interval. In this case, it is preferable in terms of being able to continuously maintain the shapes of the junction part 130 and the non-junction part 140 under external impact or severe external environmental conditions.
또한 비접합부(140)는 공기로 밀봉되고, 소정 패턴 형상을 가진 폐쇄형 셀(120a)을 가지게 된다. 이러한 비접합부(140)는 당 분야에 공지된 통상의 방법에 따라 제조될 수 있다. 일례를 들어 설명하면, 제1 수지 필름층(121)과 제2 수지 필름층(122)을 합지할 때 두 층(121, 122)의 접촉부 중 일부를 비접촉하도록 한 후 상기 비접촉부 사이의 공간에 공기를 주입하고, 공기 주입부를 둘러싸는 제1 수지 필름층(121)과 제2 수지 필름층(122)의 접촉부를 합지 및/또는 융착 등을 통해 밀봉시켜 제조될 수 있다. 이때 공기를 밀봉시키는 방법은 특별히 한정되지 않는다. 그리고 폐쇄형 셀(120a) 내부에 충전되는 공기밀도는 특별히 제한되지 않으며, 당 분야에 공지된 범위 내에서 적절히 조절할 수 있다. In addition, the non-junction portion 140 is sealed with air, and has a closed cell 120a having a predetermined pattern shape. The non-bonding portion 140 may be manufactured according to a conventional method known in the art. For example, when the first resin film layer 121 and the second resin film layer 122 are laminated, some of the contact parts of the two layers 121 and 122 are made non-contact, and then in the space between the non-contact parts. It may be manufactured by injecting air and sealing the contact portion between the first resin film layer 121 and the second resin film layer 122 surrounding the air injection unit through lamination and/or fusion bonding. At this time, the method of sealing the air is not particularly limited. And the density of the air filled inside the closed cell (120a) is not particularly limited, and can be appropriately adjusted within a range known in the art.
본 발명에서는 시트의 변형이나 파손 방지 효과, 및 폐쇄형 셀의 형태 유지 효과를 고려하여, 셀층(120)에서 복수의 폐쇄형 셀이 형성되는 셀 형성부(A, 140)와, 폐쇄형 셀 비형성부(B, 130) 간의 면적을 소정 비율로 조절하는 것이 바람직하다. 이때 당해 셀층(120)을 구성하는 전체 영역(예, A+B = 100%) 중에서, 복수의 폐쇄형 셀(Closed cell) 형성부(A)는 전술한 비접합부(140)와 동일한 의미로 정의되며, 복수의 폐쇄형 셀(120a)을 제외한 나머지 셀층, 즉 폐쇄형 셀 비형성부(B)는 전술한 접합부(130)로 정의하여 설명하기로 한다. In the present invention, in consideration of the effect of preventing deformation or damage of the sheet, and the effect of maintaining the shape of the closed cells, the cell forming portions A and 140 in which a plurality of closed cells are formed in the cell layer 120, and the closed cell non-type It is preferable to adjust the area between the voice parts B and 130 in a predetermined ratio. At this time, among the entire area (eg, A+B = 100%) constituting the cell layer 120 , the plurality of closed cell forming portions A have the same meaning as the above-described non-junction portion 140 . And, the remaining cell layers except for the plurality of closed cells 120a, that is, the closed cell non-formed portion B will be defined as the above-described junction portion 130 and will be described.
일 구체예를 들면, 당해 셀층(120)의 평단면 1㎡ 단위면적을 기준으로, 상기 복수의 폐쇄형 셀(A)의 총 면적은 상기 폐쇄형 셀을 제외한 나머지 셀층(B)의 총 면적보다 큰 것일 수 있다. 즉, 평면 상에서 접합부(130, B)의 총 면적은 비접합부(140, A)의 총 면적 보다 작은 것이, 시트의 내구성 및 폐쇄형 셀층의 형태 유지성을 향상시킨다는 점에서 바람직하다. 일례로, 복수의 폐쇄형 셀을 제외한 나머지 셀층(B, 접합부, 130)의 총 면적과, 복수의 폐쇄형 셀(A, 비접합부, 140)의 총 면적의 비율은 1 : 2 내지 15일 수 있으며, 구체적으로 1 : 3 내지 15, 1 : 2.5 내지 12, 1 : 4.5 내지 13, 1 : 4.5 내지 10, 1 : 2.5 내지 10, 1 : 3 내지 10, 1 : 3 내지 8, 1 : 2.5 내지 7, 1 : 3 내지 5, 1 : 2.5 내지 4의 범위 내에서 비접합부(140)의 면적 형태 및 패턴에 따라 실시할 수 있다. For example, based on a unit area of 1 m2 of a flat cross-section of the cell layer 120, the total area of the plurality of closed cells (A) is greater than the total area of the remaining cell layers (B) except for the closed cells. It could be a big one. That is, it is preferable that the total area of the joined portions 130 and B on a plane is smaller than the total area of the non-bonded portions 140 and A in terms of improving the durability of the sheet and shape retention of the closed cell layer. For example, the ratio of the total area of the remaining cell layers (B, junction, 130) to the total area of the plurality of closed cells (A, non-junction, 140) except for the plurality of closed cells is 1: 2 to 15 days. and specifically 1: 3 to 15, 1: 2.5 to 12, 1: 4.5 to 13, 1: 4.5 to 10, 1: 2.5 to 10, 1: 3 to 10, 1: 3 to 8, 1: 2.5 to 7, 1: 3 to 5, 1: 2.5 to 4 may be carried out according to the area shape and pattern of the non-junction portion 140.
후술되는 도 2 및 3를 예를 들어 구체적으로 설명하면, 비접합부(140, A)의 밑면 형상, 즉 폐쇄형 셀(120a)의 수평 단면 형상이 원형인 경우, 복수의 폐쇄형 셀을 제외한 나머지 셀층(B, 접합부, 130)의 면적과, 복수의 폐쇄형 셀(A, 비접합부, 140)의 면적 간의 비율은 1 : 2.5 내지 10일 수 있으며, 바람직하게는 1 : 2.5 내지 7, 보다 바람직하게는 1 : 2.5 내지 4인 것이, 원형 폐쇄형 셀의 패턴 유지 및 폐쇄형 셀층의 내구성 면에서 바람직하다. 2 and 3 to be described later, for example, when the bottom surface shape of the non-junction portion 140, A, that is, the horizontal cross-sectional shape of the closed cell 120a is circular, the rest except for the plurality of closed cells The ratio between the area of the cell layer (B, junction, 130) and the area of the plurality of closed cells (A, non-junction, 140) may be 1:2.5 to 10, preferably 1:2.5 to 7, more preferably Preferably, it is 1:2.5 to 4, preferably in terms of maintaining the pattern of the circular closed cell and durability of the closed cell layer.
그리고 도 3에 도시된 바와 같이, 비접합부(140) 밑면 형상, 즉 폐쇄형 셀(120a)의 수평 단면 형상이 직사각형인 경우, 복수의 폐쇄형 셀을 제외한 나머지 셀층(B, 접합부, 130)의 면적과, 복수의 폐쇄형 셀(A, 비접합부, 140)의 면적 간의 비율은 1 : 3 내지 15일 수 있으며, 바람직하게는 1 : 4.5 내지 13, 보다 바람직하게는 1 : 4.5 내지 10인 것이, 직사각형 폐쇄형 셀의 패턴 유지 및 폐쇄형 셀층의 내구성 면에서 바람직하다.And as shown in FIG. 3, when the bottom surface of the non-junction part 140, that is, the horizontal cross-sectional shape of the closed cell 120a is rectangular, the remaining cell layers (B, junction part, 130) except for the plurality of closed cells. The ratio between the area and the area of the plurality of closed cells (A, non-junction portion, 140) may be 1: 3 to 15, preferably 1: 4.5 to 13, more preferably 1: 4.5 to 10. , which is preferable in terms of maintaining the pattern of the rectangular closed cell and durability of the closed cell layer.
또한 본 발명에서는 셀층(120)에 형성되는 복수의 폐쇄형 셀(120a)의 개수를 소정 범위로 조절하여 시트의 변형이나 파손 방지 효과, 및 폐쇄형 셀의 형태 유지 효과를 상승시킬 수 있다. 일례로, 복수의 폐쇄형 셀(120a)은 당해 셀층(120)의 평단면 1㎡ 단위면적 당 10 내지 1000개로 포함될 수 있으며, 구체적으로 40 내지 500개 일 수 있다. 이러한 폐쇄형 셀의 개수는 그 크기 및 형상에 따라 조절 가능하며, 전술한 범위에 한정되지 않는다. In addition, in the present invention, by adjusting the number of the plurality of closed cells 120a formed in the cell layer 120 to a predetermined range, the effect of preventing deformation or damage of the sheet, and the effect of maintaining the shape of the closed cells can be increased. For example, the plurality of closed cells 120a may be included in the number of 10 to 1000 per 1 m 2 unit area of the flat cross-section of the cell layer 120 , and specifically may be 40 to 500 . The number of such closed cells can be adjusted according to their size and shape, and is not limited to the above-described range.
본 발명에 따른 폐쇄형 셀(120a)은 그 내부에 소정의 공기가 밀봉됨에 따라 시트(100)의 쿠션닝을 부여하고, 외부 표면이 굴곡지게 형성됨에 따라 시각적으로도 쿠션감을 느낄 수 있다는 장점을 가진다. 즉, 접합부(130)와 비접합부(140)의 반복적인 교번 배치로 인해 복수의 폐쇄형 셀(120a)이 일정 간격으로 형성된 폐쇄형 셀층(120)을 구비할 수 있고, 이러한 폐쇄형 셀층(120)은 외부로부터의 충격이나 가혹한 외부 환경조건에서 변형이나 파손 등의 방지 효과 및 폐쇄형 셀의 형태 유지 효과를 동시에 구현할 수 있는 시트를 제공할 수 있게 된다. The closed cell 120a according to the present invention provides cushioning of the seat 100 as predetermined air is sealed therein, and as the outer surface is formed to be curved, it is possible to visually feel the cushioning feeling. have That is, the plurality of closed cells 120a may include the closed cell layers 120 formed at regular intervals due to the repetitively alternating arrangement of the junctions 130 and the non-junction parts 140 , and these closed cell layers 120 . ) can provide a sheet that can simultaneously implement the effect of preventing deformation or damage from external shocks or harsh external environmental conditions and maintaining the shape of a closed cell.
상기 셀층(120)의 일면, 구체적으로 제1 수지 필름층(121)과 접하지 않는 셀층(120)의 표면은, 공기로 밀봉되는 복수의 폐쇄형 셀(120a)이 반복적으로 배열하여 형성된 소정의 양각(emboss) 패턴을 포함한다. 구체적으로, 셀층(120)은 비접합부(140) 영역에 형성되는 복수의 폐쇄형 셀(121)과, 상기 폐쇄형 셀(121)이 미형성된 평평한 접합부(130) 영역이 교번하여 이루어진 규칙적인 양각 패턴을 갖는다. 이러한 양각 패턴은, 제1 방향을 따라서 형성되는 패턴 너비; 상기 제1 방향과 교차되는 제2 방향을 따라서 형성되는 패턴 길이; 및 상기 제1 방향 및 상기 제2 방향에 직교하며 상기 제1 수지 필름층(121)에 수직한 방향을 따라서 형성되는 패턴 높이를 갖는다. 이때 상기 양각 패턴의 각 패턴 너비, 패턴 길이 및/또는 패턴 높이는 특별히 제한되지 않으며, 사용하고자 하는 용도에 따라 적절히 조절할 수 있다. 일례로, 양각 패턴을 이루는 각 패턴의 너비, 길이 및/또는 높이는 실질적으로 동일할 수 있다. One surface of the cell layer 120, specifically the surface of the cell layer 120 not in contact with the first resin film layer 121, is formed by repeatedly arranging a plurality of closed cells 120a sealed with air. Includes emboss patterns. Specifically, the cell layer 120 includes a plurality of closed cells 121 formed in the non-junction portion 140 region, and a regular embossed region formed by alternating the flat junction portion 130 region in which the closed cells 121 are not formed. have a pattern The embossed pattern may include a pattern width formed along the first direction; a pattern length formed along a second direction crossing the first direction; and a pattern height formed along a direction perpendicular to the first and second directions and perpendicular to the first resin film layer 121 . In this case, each pattern width, pattern length, and/or pattern height of the embossed pattern is not particularly limited, and may be appropriately adjusted according to the intended use. For example, the width, length, and/or height of each pattern constituting the embossed pattern may be substantially the same.
또한 양각(emboss) 패턴의 수평 단면 형상은 특별히 제한되지 않으며, 일례로 원형, 반원형, 부채꼴형, 삼각형 이상의 다각형일 수 있다. 그 외에도, 당 분야에 공지된 다양한 패턴 형상을 제한 없이 적용할 수 있다. 또한 셀층(120)의 일면에 형성된 양각 패턴의 수직 단면 형상은 특별히 제한되지 않으며, 일례로 원기둥, 반구형, 또는 적어도 일면이 볼록한 곡면을 가진 다면체 형상일 수 있다. In addition, the horizontal cross-sectional shape of the emboss pattern is not particularly limited, and may be, for example, a circular shape, a semicircle shape, a sector shape, or a polygonal shape of a triangle or more. In addition, various pattern shapes known in the art may be applied without limitation. In addition, the vertical cross-sectional shape of the embossed pattern formed on one surface of the cell layer 120 is not particularly limited, and may be, for example, a cylindrical shape, a hemispherical shape, or a polyhedral shape having a convex curved surface on at least one surface.
그리고 복수의 폐쇄형 셀(120a) 중 어느 하나와, 이와 인접하는 다른 폐쇄형 셀(120a) 중 어느 하나 사이에는 소정의 이격 거리가 형성된다. 상기 이격 거리는 특별히 제한되지 않으며, 일례로 전술한 패턴 너비와 패턴 길이 중 어느 하나와 같거나 이보다 작게 형성될 수 있다. 또한 셀층(120)의 높이는 특별히 제한되지 않으며, 일례로 셀층(120)의 일면에 구비되는 복수의 폐쇄형 셀(120a)의 패턴 높이와 실질적으로 동일할 수 있다.And a predetermined separation distance is formed between any one of the plurality of closed cells 120a and any one of the other closed cells 120a adjacent thereto. The separation distance is not particularly limited, and for example, may be formed to be equal to or smaller than any one of the above-described pattern width and pattern length. In addition, the height of the cell layer 120 is not particularly limited, and for example, may be substantially the same as the pattern height of the plurality of closed cells 120a provided on one surface of the cell layer 120 .
인쇄부printing department
본 발명에 따른 폐쇄형 셀층을 갖는 시트(100)는, 상기 제1 수지 필름층(121)의 적어도 일면에 형성되고, 소정의 색상 또는 무늬를 갖는 인쇄부(150)를 포함한다. The sheet 100 having a closed cell layer according to the present invention includes a printing unit 150 formed on at least one surface of the first resin film layer 121 and having a predetermined color or pattern.
이러한 인쇄부(150)는 다양한 색상, 문양, 및/또는 패턴을 구현함에 따라 종래 시트 대비 가독성을 높이고 우수한 식별력을 발휘할 수 있다. 상기 인쇄부(150)의 색상, 무늬 및/또는 패턴은 특별히 제한되지 않으며, 사용하고자 하는 용도 또는 사용자의 니즈(needs)에 맞게 적절히 적용될 수 있다. 일례로, 인쇄부(150)는 당 분야의 통상적인 안료를 함유하는 유색의 형태이거나, 또는 소정의 무늬와 색상을 동시에 포함하는 형태일 수 있다.As the printing unit 150 implements various colors, patterns, and/or patterns, it is possible to increase readability compared to a conventional sheet and exhibit excellent discrimination. The color, pattern, and/or pattern of the printing unit 150 is not particularly limited, and may be appropriately applied according to the intended use or the user's needs. For example, the printing unit 150 may be a colored type containing a conventional pigment in the art, or a type containing a predetermined pattern and color at the same time.
인쇄부(150)가 형성되는 위치는 특별히 제한되지 않는다. 일례로, 상기 제1 수지 필름층(121)의 타면 상에 형성되거나, 상기 셀층(120)과 접촉하는 상기 제1 수지 필름층(121)의 일면 상에 형성되거나, 또는 이들 모두에 형성될 수 있다. 또한 형성되는 인쇄부(150)의 크기/면적은 특별히 제한되지 않으며, 평면 상에서 제1 수지 필름층(121)과 실질적으로 동일한 크기/면적을 갖거나 또는 이보다 작을 수 있다. 구체적으로, 인쇄부(150)는 제1 수지 필름층(121)의 적어도 일면, 예컨대 타면의 전체에 대면적으로 형성될 수 있고, 또는 일부 영역에 부분적으로 형성될 수 있다.A position where the printing unit 150 is formed is not particularly limited. For example, it may be formed on the other surface of the first resin film layer 121 , formed on one surface of the first resin film layer 121 in contact with the cell layer 120 , or formed on both of them. have. Also, the size/area of the printed part 150 to be formed is not particularly limited, and may have substantially the same size/area as the first resin film layer 121 on a plane or smaller than this. Specifically, the printing unit 150 may be formed on at least one surface of the first resin film layer 121 , for example, on the whole of the other surface in a large area, or may be formed partially on a partial area.
그리고 인쇄부(150)는 제1 수지 필름층(121) 및/또는 제2 수지 필름층(121) 상에 직접 인쇄를 통해 소정의 색상, 무늬 및/또는 패턴을 형성할 수 있으며, 혹은 소정의 색상 및/또는 무늬가 기형성된 프린팅층(160)을 별도로 사용하여 제1 수지 필름층(121) 상에 적층시켜 형성될 수도 있다. And the printing unit 150 may form a predetermined color, pattern and/or pattern through direct printing on the first resin film layer 121 and/or the second resin film layer 121, or The color and/or pattern may be formed by separately using the preformed printing layer 160 and laminating it on the first resin film layer 121 .
일례로, 제1 수지 필름층(121) 및/또는 제2 수지 필름층(121) 상에 직접 인쇄하여 인쇄부(150)를 형성할 경우, 당 분야에 알려진 통상적인 인쇄법을 이용할 수 있다. 사용 가능한 인쇄법의 비제한적인 예로는, 그라비아 인쇄법(Gravure Printing), 전사인쇄법(Transfer Printing), 디지털 인쇄법(Digital Printing), 오프셋 인쇄법(Offset Printing), 플랙소 인쇄법(Flexographic Printing), 스크린 인쇄법(Screen Printing), 리소 인쇄법(RISO Printing) 또는 로터리 스크린 인쇄법(Rotary Screen Printing) 등이 있다. 구체적으로, 인쇄부(150)는 전술한 인쇄법을 통해 제1 수지 필름층(121)의 적어도 일면, 예컨대 타면의 전체에 대면적으로 형성될 수 있고, 또는 타면의 일부 영역에 부분적으로 형성될 수 있다. 이와 같이 제1 수지 필름층(121)의 적어도 일면에 특정 이미지를 직접적으로 인쇄할 경우, 식별력을 가질 뿐만 아니라 별도의 인쇄공정에 소요되는 부대비용을 줄여 원가절감이 가능하므로, 제품 경쟁력을 향상시킬 수 있다.For example, when the printing unit 150 is formed by printing directly on the first resin film layer 121 and/or the second resin film layer 121 , a conventional printing method known in the art may be used. Non-limiting examples of printing methods that can be used include Gravure Printing, Transfer Printing, Digital Printing, Offset Printing, Flexographic Printing ), screen printing, RISO Printing, or rotary screen printing. Specifically, the printing unit 150 may be formed in a large area on at least one surface of the first resin film layer 121 through the above-described printing method, for example, the entire other surface, or may be partially formed in a partial area of the other surface. can In this way, when a specific image is directly printed on at least one surface of the first resin film layer 121, it not only has a distinguishing power, but also reduces the incidental cost required for a separate printing process, thereby reducing costs, thereby improving product competitiveness. can
또한 본 발명에서는 제1 수지 필름층(121)의 적어도 일면, 구체적으로 타면 상에 소정의 색상 및/또는 무늬가 형성된 프린팅층(160)을 적층시켜 인쇄부(160)를 형성할 수 있다. 이 경우, 제1 수지 필름층(121)과 전사 무늬를 갖는 인쇄부(150) 간의 접착력 상승을 도모하기 위해서, 이들 간의 접착력을 강화시키는 당 분야에 공지된 통상의 접착제층을 더 포함할 수도 있다. 그 외에, 전사 무늬를 가진 인쇄 이형지를 이용하여 인쇄부(150)을 형성할 수도 있다. Also, in the present invention, the printing unit 160 may be formed by laminating a printing layer 160 having a predetermined color and/or pattern formed on at least one surface, specifically, the other surface of the first resin film layer 121 . In this case, in order to increase the adhesion between the first resin film layer 121 and the printing unit 150 having a transfer pattern, a conventional adhesive layer known in the art for strengthening the adhesion between them may be further included. . In addition, the printing unit 150 may be formed using a printing release paper having a transfer pattern.
한편 본 발명에 따른 폐쇄형 셀층을 갖는 시트(100)를 제조하는 방법은 특별히 제한되지 않으며, 당 분야에 공지된 통상의 시트 제조 장치를 사용하여 제조될 수 있다. Meanwhile, the method for manufacturing the sheet 100 having a closed cell layer according to the present invention is not particularly limited, and may be manufactured using a conventional sheet manufacturing apparatus known in the art.
일례로, 상기 시트 제조 장치는 호퍼, 압출장치 및 롤러를 구비하는 장치를 제한 없이 사용할 수 있으며, 이때 롤러는 다양한 형상을 제조하기 위한 성형롤러, 가압롤러, 가이드 롤러, 및 지지롤러 중 적어도 하나 이상을 구비할 수 있다. 또한 압출 및/또는 성형시, 온도 및 압력은 특별히 제한되지 않으며, 당 분야에 공지된 통상의 범위 내에서 적절히 조절할 수 있다. 일례로, 필름을 구성하는 수지의 연화점 이상의 온도일 수 있다. As an example, the sheet manufacturing apparatus may use an apparatus including a hopper, an extrusion apparatus and a roller without limitation, wherein the roller is at least one of a forming roller, a pressure roller, a guide roller, and a support roller for manufacturing various shapes. can be provided. In addition, during extrusion and/or molding, temperature and pressure are not particularly limited, and may be appropriately adjusted within the usual ranges known in the art. For example, the temperature may be higher than the softening point of the resin constituting the film.
이하에서는 본 발명의 일 실시예에 따라 폐쇄형 셀층을 갖는 시트의 다양한 변형예에 관하여 도 2 내지 도 9를 참조하여 설명하도록 한다.Hereinafter, various modifications of the sheet having a closed cell layer according to an embodiment of the present invention will be described with reference to FIGS. 2 to 9 .
도 2 및 도 3은 본 발명에 따른 폐쇄형 셀층을 갖는 시트(100)의 일면에 구비되는 접합부(130)와 비접합부(140)의 다양한 실시형태를 나타내는 평면 모식도이다. 2 and 3 are schematic plan views showing various embodiments of the bonded portion 130 and the non-bonded portion 140 provided on one surface of the sheet 100 having a closed cell layer according to the present invention.
상기 도 2을 참조하여 설명하면, 비접합부(140)의 평면 형상, 구체적으로 비접합부(140) 영역에 형성되는 복수의 폐쇄형 셀(120a)의 평면 형상은 원형 패턴일 수 있다. 또한 도 3에서 비접합부(140) 영역에 형성된 복수의 폐쇄형 셀(120a)의 평면 형상은 직사각형 패턴을 가질 수 있다. Referring to FIG. 2 , the planar shape of the non-junction part 140, specifically, the planar shape of the plurality of closed cells 120a formed in the non-junction part 140 region may be a circular pattern. In addition, the planar shape of the plurality of closed cells 120a formed in the non-junction portion 140 region in FIG. 3 may have a rectangular pattern.
본 발명에서는 도 2 및 3을 통해 폐쇄형 셀층을 갖는 시트(100)의 일면에 구비된 비접합부(140)의 평면 형상을 구체적으로 예시하였다. 그러나 이에 한정되지 않으며, 당 업계에 공지된 다양한 형태와 크기를 갖도록 변형 가능하다. In the present invention, the planar shape of the non-bonding portion 140 provided on one surface of the sheet 100 having a closed cell layer is specifically illustrated through FIGS. 2 and 3 . However, the present invention is not limited thereto, and may be modified to have various shapes and sizes known in the art.
도 4 내지 도 6은 본 발명에 따른 폐쇄형 셀층을 갖는 시트(100)의 일면에 구비되는 접합부(130)와 비접합부(140)의 다양한 실시형태를 나타내는 개략 사시도이다. 4 to 6 are schematic perspective views illustrating various embodiments of the bonded portion 130 and the non-bonded portion 140 provided on one surface of the sheet 100 having a closed cell layer according to the present invention.
상기 도 4 및 5에 도시된 비접합부(140)의 평면 형상은 모두 원형 패턴을 나타내는 것에 비해, 비접합부(140)의 수직 단면 형상, 구체적으로 비접합부(140) 영역에 형성된 복수의 폐쇄형 셀(120a)의 양각(emboss) 패턴은 각각 원기둥 또는 반구 형상을 가질 수 있다. 4 and 5, all of the planar shapes of the non-junction part 140 show a circular pattern, whereas the vertical cross-sectional shape of the non-junction part 140, specifically, a plurality of closed cells formed in the non-junction part 140 area. Each of the emboss patterns of 120a may have a cylindrical or hemispherical shape.
또한 도 6에 도시된 비접합부(140)의 평면 형상은 도 3과 같이 직사각형 패턴 형상을 갖는 것에 비해, 상기 비접합부(140)의 수직 단면 형상, 구체적으로 비접합부(140) 영역에 형성된 복수의 폐쇄형 셀(120a)의 양각 패턴은 일면이 볼록한 곡면을 가진 다면체(polygon) 형상을 가질 수 있다. In addition, the planar shape of the non-junction part 140 shown in FIG. 6 has a vertical cross-sectional shape of the non-junction part 140, specifically, a plurality of non-junction parts 140 formed in the region, compared to having a rectangular pattern shape as shown in FIG. 3 . The embossed pattern of the closed cell 120a may have a polygonal shape having a convex curved surface.
상술한 바와 같이, 본 발명에서는 비접합부(140)와, 상기 비접합부(140) 영역에 형성되는 폐쇄형 셀(120a)의 패턴 형상을 다양하게 변형 실시함으로써, 본 발명에 따른 폐쇄형 셀층을 갖는 시트(100)의 사용 목적 및 용도에 따라 폭넓게 적용할 수 있는 장점을 가질 수 있다. As described above, in the present invention, by variously modifying the pattern shape of the non-junction part 140 and the closed cell 120a formed in the non-junction part 140 region, having a closed cell layer according to the present invention It may have the advantage of being widely applicable according to the purpose and purpose of use of the sheet 100 .
또한 본 발명에 따른 시트(100)에 구비되는 폐쇄형 셀(120a)은 접합부(130)와 비접합부(140)의 규칙적인 교번 배치로 인하여 구성되며, 이때 폐쇄형 셀(120a)의 형상과 비접합부(140)의 형상은 서로 동일하거나 또는 상이할 수 있다. 구체적으로, 접합부(140)는 제1 수지 필름층(121)의 일면(예, 상부)에 형성되는 밑면의 패턴, 즉 평면 형상을 의미하며, 폐쇄형 셀(120a)은 제1 수지 필름층(121)의 일면(상부)과 제2 수지 필름층(122)의 일면이 부분 접합되어 이들(121, 122) 사이의 내부 공간에 형성된 밀폐부를 의미한다는 점에서, 폐쇄형 셀(120a)의 패턴 형상과 비접합부(140)의 평면 형상은 서로 상이할 수 있다.In addition, the closed cell 120a provided in the sheet 100 according to the present invention is configured due to the regular alternating arrangement of the junction part 130 and the non-junction part 140, and at this time, the shape and ratio of the closed cell 120a The shapes of the joint portions 140 may be the same or different from each other. Specifically, the bonding portion 140 means a pattern of the bottom surface formed on one surface (eg, the upper portion) of the first resin film layer 121, that is, a planar shape, and the closed cell 120a is the first resin film layer ( The pattern shape of the closed cell 120a in that one surface (upper part) of 121) and one surface of the second resin film layer 122 are partially bonded to mean a sealed part formed in the internal space between them 121 and 122 The planar shape of the non-junction portion 140 may be different from each other.
한편 본 발명에서는 도 4 내지 도 6을 통해 비접합부(140) 영역에 형성되는 폐쇄형 셀(120a) 패턴의 단면 형상을 구체적으로 예시하였다. 그러나 이에 한정되지 않으며, 당 업계에 공지된 다양한 형태와 크기를 갖도록 변형 가능하다. Meanwhile, in the present invention, the cross-sectional shape of the closed cell 120a pattern formed in the non-junction portion 140 region is specifically illustrated through FIGS. 4 to 6 . However, the present invention is not limited thereto, and may be modified to have various shapes and sizes known in the art.
도 7 내지 도 9는 본 발명의 폐쇄형 셀층을 갖는 시트(100)에 구비되는 인쇄부(150)의 다양한 실시형태를 나타내는 단면도이다.7 to 9 are cross-sectional views illustrating various embodiments of the printing unit 150 provided in the sheet 100 having a closed cell layer of the present invention.
도 7은 본 발명에 따른 폐쇄형 셀층을 갖는 시트의 다른 일 실시예를 개략적으로 도시한 것이다. 7 schematically shows another embodiment of a sheet with a closed cell layer according to the present invention.
상기 도 7을 참조하면, 본 발명의 다른 일 실시예에 따른 폐쇄형 셀층을 갖는 시트는, 인쇄부(150)가 제1 수지 필름층의 타면 일부에 단독 형성되는 도 1과 비교하여, 제1 수지 필름층(121) 타면의 일부에 형성된 제1 인쇄부(150); 및 복수의 폐쇄형 셀이 형성된 셀층(120) 표면의 일부에 형성된 제2 인쇄부(150)를 모두 포함한다. Referring to FIG. 7 , in the sheet having a closed cell layer according to another embodiment of the present invention, compared with FIG. 1 in which the printing unit 150 is formed alone on a portion of the other surface of the first resin film layer, the first a first printing unit 150 formed on a part of the other surface of the resin film layer 121; and a second printing unit 150 formed on a portion of the surface of the cell layer 120 in which a plurality of closed cells are formed.
특히 복수의 폐쇄형 셀이 형성된 셀층(120) 표면, 즉 제2 수지 필름층(122)의 외측면(타면) 상부에 형성된 제2 인쇄부(150)를 구비하는 시트의 경우, 평면 상에 단독 형성된 인쇄 패턴(예, 제1 인쇄부)을 갖는 것에 비해 입체감을 부여할 수 있고, 시각적으로 특정 인쇄 패턴의 가독성이나 시안성을 높이는 효과를 얻을 수 있다. In particular, in the case of a sheet having a second printing unit 150 formed on the surface of the cell layer 120 on which a plurality of closed cells are formed, that is, the outer surface (the other surface) of the second resin film layer 122, it is only on the plane Compared to having the formed print pattern (eg, the first print unit), a three-dimensional effect can be imparted, and the effect of visually increasing the readability or visibility of a specific print pattern can be obtained.
이때 제2 수지 필름층(122)의 타면에 제2 인쇄부(150)를 형성하는 방법은 특별히 제한되지 않으며, 전술한 제1 수지 필름층(121) 상에 제1 인쇄부(150)를 직접 인쇄하는 방법과 동일하게 실시될 수 있다. 일례로, 당 분야에 공지된 통상의 그라비아(Gravure) 인쇄, 전사인쇄, 디지털 인쇄, 오프셋 인쇄, 플랙소 인쇄, 스크린 인쇄, 리소(RISO) 인쇄 또는 로터리스크린(Rotary Screen) 등의 인쇄법을 사용할 수 있다. At this time, the method of forming the second printing part 150 on the other surface of the second resin film layer 122 is not particularly limited, and the first printing part 150 is directly applied on the first resin film layer 121 described above. It can be carried out in the same way as the printing method. As an example, conventional gravure printing, transfer printing, digital printing, offset printing, flexo printing, screen printing, litho (RISO) printing or rotary screen printing methods known in the art may be used. can
또한 제2 인쇄부(150)는 전술한 인쇄공정을 통해 소정의 문양, 디자인, 패턴이 일면에 인쇄된 제2 수지 필름층(122)을 제1 수지 필름층(121)과 합지시켜 제조될 수 있으며, 또는 인쇄되지 않은 제1 수지 필름층(121)과 제2 수지 필름층(122)을 서로 대향 배치시켜 합지 및 접합한 후 비접합부(140) 영역의 일부, 즉 제2 수지 필름층(122)의 타면(예, 외측면 상부) 상에 직접 인쇄를 실시하여 제2 인쇄부(150)를 형성할 수 있다. 폐쇄형 셀(120a)의 형태 안정성 및 내구성 측면을 고려할 때, 전자의 방법으로 제2 인쇄부(150)를 형성하는 것이 바람직하다. In addition, the second printing unit 150 may be manufactured by laminating the second resin film layer 122 having a predetermined pattern, design, and pattern printed on one side with the first resin film layer 121 through the above-described printing process. Or, after laminating and bonding the non-printed first resin film layer 121 and the second resin film layer 122 to face each other, a portion of the non-bonding portion 140 region, that is, the second resin film layer 122 ) may be directly printed on the other surface (eg, upper outer surface) to form the second printing unit 150 . Considering the form stability and durability of the closed cell 120a, it is preferable to form the second printing part 150 by the former method.
도 8은 본 발명에 따른 폐쇄형 셀층을 갖는 시트의 다른 일 실시예를 대략적으로 도시한 것이다. 8 schematically shows another embodiment of a sheet having a closed cell layer according to the present invention.
도 1에 도시된 인쇄부(150)는 제1 수지 필름층(121)의 타면 일부에 형성되는 것에 비해, 도 8에 따른 인쇄부(150)의 다른 일 실시예를 설명하면, 폐쇄형 셀층(120)과 접촉하는 제1 수지 필름층(121)의 일면, 즉 제2 수지 필름층(121)과 합지되는 제1 수지 필름층(121)의 일면(내측면 상부)에 인쇄부(150)가 마련될 수 있다. 이때 인쇄부(150)는 제1 수지 필름층(121)의 일면 전체에 대면적으로 형성되거나 또는 일부 영역에 부분적으로 형성될 수 있다. Compared to the printing unit 150 shown in FIG. 1 that is formed on a part of the other surface of the first resin film layer 121, another embodiment of the printing unit 150 according to FIG. 8 is described with a closed cell layer ( 120) on one surface of the first resin film layer 121, that is, on one surface (inner side upper part) of the first resin film layer 121 laminated with the second resin film layer 121, the printing unit 150 is can be provided. In this case, the printing unit 150 may be formed in a large area on the entire surface of the first resin film layer 121 or may be partially formed in a partial area.
전술한 바와 같이, 제1 수지 필름층(121)의 내측면, 즉 제2 수지 필름층(122)과 접촉하는 면 상부에 인쇄부(150)를 형성할 경우, 외부의 충격이나 가혹 조건으로부터 인쇄부(150)를 보호할 수 있어, 인쇄부(150)의 유지력 및 제품 경쟁력을 향상시킬 수 있다. 또한, 제1 수지 필름층(121) 및 제2 수지 필름층(122) 사이에 개재(介在)되는 인쇄 필름의 일부를 일정 배열로 적층시켜 목적하는 패턴이나 이미지를 보여주는 효과를 얻을 수도 있다. As described above, when the printing unit 150 is formed on the inner surface of the first resin film layer 121 , that is, on the surface in contact with the second resin film layer 122 , printing is performed from external impact or harsh conditions. It is possible to protect the unit 150 , thereby improving the holding power of the printing unit 150 and product competitiveness. In addition, a portion of the printed film interposed between the first resin film layer 121 and the second resin film layer 122 may be laminated in a predetermined arrangement to obtain an effect of showing a desired pattern or image.
상기 인쇄 필름은 소정의 색상, 이미지, 및/또는 문양 등이 전술한 인쇄방법으로 인쇄된 필름을 의미한다. 이러한 인쇄 필름은 당 분야에서 통상적으로 알려진 플라스틱 필름을 제한 없이 사용할 수 있으며, 구체적으로 전술한 제1 수지 필름층(121)을 구성하는 재료와 동일하거나 상이한 생분해성 고분자를 사용하는 것이 바람직하다.The printing film refers to a film on which a predetermined color, image, and/or pattern is printed by the above-described printing method. As the printing film, a plastic film commonly known in the art may be used without limitation, and specifically, it is preferable to use the same or different biodegradable polymer as the material constituting the first resin film layer 121 described above.
일 구체예를 들면, 상기 인쇄 필름은 전분, 셀룰로오스, 키틴, PLA(polylactide), PHA(polyhydroxyalkanoates), PCL(poly ε-caprolactone), PBAT(Polybutylene adipate terephthalate), PGA(polyglycolacid), AP(aliphaticpolyester), PHBV(P(3-hydroxybutyrate-co 3-hydroxy valerate)), PBS(Polybutylene Succinate) 및 이들의 조합으로 이루어진 군에서 선택되는 1종 이상을 포함할 수 있다. 바람직한 일 구체예를 들면, 상기 인쇄 필름은 PLA(polylactide) 및 PBAT(Polybutylene adipate terephthalate)의 혼합으로 이루어지는 것이 시트의 생분해성을 유지하면서도 내구성 및 열적 기계적 특성을 향상시킬 수 있는 장점을 가진다. In one embodiment, the printing film is starch, cellulose, chitin, PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ε-caprolactone), PBAT (Polybutylene adipate terephthalate), PGA (polyglycolacid), AP (aliphaticpolyester) , PHBV (3-hydroxybutyrate-co 3-hydroxy valerate), PBS (Polybutylene Succinate), and may include one or more selected from the group consisting of combinations thereof. In a preferred embodiment, the printing film is made of a mixture of PLA (polylactide) and PBAT (Polybutylene adipate terephthalate). It has the advantage of improving durability and thermal and mechanical properties while maintaining the biodegradability of the sheet.
도 9는 본 발명에 따른 폐쇄형 셀층을 갖는 시트의 다른 일 실시예를 대략적으로 도시한 것이다. 9 schematically shows another embodiment of a sheet having a closed cell layer according to the present invention.
도 9를 참조하여 본 발명에 따른 인쇄부(150)의 다른 일 실시예를 설명하면, 상기 인쇄부(150)는 제1 수지 필름층(121)의 타면 상에 특정 이미지가 인쇄된 프린팅층(160)을 적층시켜 형성된 것일 수 있다. Another embodiment of the printing unit 150 according to the present invention will be described with reference to FIG. 9 , the printing unit 150 includes a printing layer ( 160) may be formed by laminating.
상기 인쇄부(150)는 제1 수지 필름층(121)의 타면 상에 직접적으로 인쇄법을 통해 형성될 수 있고, 또는 별도의 프린팅층(160)을 적층시켜 형성될 수도 있다. 이때 특정 이미지가 인쇄된 프린팅층(160)을 제1 수지 필름층(121)의 타면 상에 적층시켜 인쇄부(150)를 형성할 경우, 프린팅층(160)에 소정의 이미지를 별도로 인쇄할 수 있어, 이미지의 세밀화 및 해상도를 높일 수 있다. 또한 프린팅층(160)이 추가로 적층됨에 따라, 외부 충격이나 가혹한 외부환경으로부터의 시트 파손 등을 방지하고, 내구성을 보다 높일 수 있다는 장점을 가진다. The printing unit 150 may be directly formed on the other surface of the first resin film layer 121 through a printing method, or may be formed by laminating a separate printing layer 160 . At this time, when the printing layer 160 on which a specific image is printed is laminated on the other surface of the first resin film layer 121 to form the printing unit 150 , a predetermined image can be separately printed on the printing layer 160 . Therefore, it is possible to increase the refinement and resolution of the image. In addition, as the printing layer 160 is additionally stacked, it is possible to prevent sheet damage from external impacts or harsh external environments, and to further increase durability.
상기 프린팅층(160)은 특별히 제한되지 않으며, 일례로 특정 이미지로 인쇄된 필름이나 시트를 의미한다. 이러한 프린팅층(160)은 당 분야에서 통상적으로 알려진 플라스틱 필름이나 시트를 제한 없이 사용할 수 있으며, 구체적으로 전술한 제1 수지 필름층(121)을 구성하는 재료와 동일하거나 상이한 생분해성 고분자를 사용하는 것이 바람직하다.The printing layer 160 is not particularly limited, and for example, refers to a film or sheet printed with a specific image. For the printing layer 160, a plastic film or sheet commonly known in the art can be used without limitation, and specifically, the same or different biodegradable polymer as the material constituting the above-described first resin film layer 121 is used. it is preferable
일 구체예를 들면, 상기 프린팅층(160)은 전분, 셀룰로오스, 키틴, PLA(polylactide), PHA(polyhydroxyalkanoates), PCL(poly ε-caprolactone), PBAT(Polybutylene adipate terephthalate), PGA(polyglycolacid), AP(aliphaticpolyester), PHBV(P(3-hydroxybutyrate-co 3-hydroxy valerate)), PBS(Polybutylene Succinate) 및 이들의 조합으로 이루어진 군에서 선택되는 1종 이상을 포함할 수 있다. 바람직한 일 구체예를 들면, 상기 프린팅층(160)은 PLA(polylactide) 및 PBAT(Polybutylene adipate terephthalate)의 혼합으로 이루어지는 것이 시트의 생분해성을 유지하면서도 내구성 및 열적 기계적 특성을 향상시킬 수 있는 장점을 가진다. For example, the printing layer 160 may include starch, cellulose, chitin, PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ε-caprolactone), PBAT (polybutylene adipate terephthalate), PGA (polyglycolacid), AP (aliphaticpolyester), PHBV (3-hydroxybutyrate-co 3-hydroxy valerate)), PBS (Polybutylene Succinate), and may include one or more selected from the group consisting of combinations thereof. In a preferred embodiment, the printing layer 160 is made of a mixture of polylactide (PLA) and polybutylene adipate terephthalate (PBAT). .
상술한 본 발명의 폐쇄형 셀층을 갖는 시트 및 그 변형예는, 친환경 수지 필름 상에 형성된 복수의 폐쇄형 셀, 및 소정의 이미지가 인쇄된 인쇄부를 구비함으로써, 외부로부터의 충격이나 가혹한 환경조건 하에서 초래되는 변형이나 파손 등을 방지하여 시트의 내구성 및 폐쇄형 셀의 형태 유지성을 높일 수 있으며, 이와 동시에 높은 가독성과 식별력, 및 친환경성을 동시에 확보할 수 있다. 이러한 본 발명에 따른 폐쇄형 셀층을 갖는 시트는, 당 분야에서 시트가 사용되는 모든 기술 분야에 제한 없이 적용될 수 있다. The above-described sheet having a closed cell layer of the present invention and a modification thereof are provided with a plurality of closed cells formed on an eco-friendly resin film, and a printing unit on which a predetermined image is printed, so that under impact from the outside or under severe environmental conditions. It is possible to increase the durability of the sheet and maintain the shape of the closed cell by preventing the resulting deformation or damage, and at the same time, high readability, discrimination, and eco-friendliness can be secured at the same time. The sheet having a closed cell layer according to the present invention can be applied without limitation to all technical fields in which the sheet is used in the art.
[실시예 1][Example 1]
본 실시예에서는 호퍼, 압출장치, 및 적어도 하나 이상의 롤러를 구비하는 통상의 시트 제조 장치를 사용하였으며, 이때 폐쇄형 셀층을 형성하기 위한 롤러로서 반원 형상을 가진 성형 롤러를 적용하였다.In this embodiment, a conventional sheet manufacturing apparatus having a hopper, an extrusion apparatus, and at least one roller was used, and in this case, a forming roller having a semicircular shape was applied as a roller for forming the closed cell layer.
구체적으로, 제1 수지 필름층과 제2 수지 필름층을 구성하는 생분해성 수지로서, PBAT 90 중량% 및 PLA 9 중량%를 사용하고, 첨가제로서 윤활제(Montan wax) 0.5 중량%, 1차 산화방지제(Phenol계) 0.3 중량%, 및 2차 산화방지제(Phosphite계) 0.2 중량%를 혼합하여 생분해성 수지 원료를 제조하였다. 제조된 생분해성 수지 원료를 시트 제조 장치의 호퍼에 삽입하였으며, 이후 T 다이에 의해 제1 수지 필름 및 제2 수지 필름을 각각 압출시켰다. 압출된 제2 수지 필름은 하기 도 2와 같은 폐쇄형 반원 형상을 가진 성형롤러에 압착하고, 상기 제1 수지 필름은 형상이 없는 평평한 롤러에 압착하였다. 이후, 제2 수지 필름의 일면과 제1 수지 필름의 일면을 서로 대향시켜 합치한 후 접합시켜 제1 수지 필름 상부에 폐쇄형 셀층을 형성하였다. 이때 성형롤러는 평단면 1㎡ 단위면적을 기준으로, 접합부(평탄부)와 비접합부(폐쇄형 반원 형상)의 면적비가 1 : 4가 되도록 조절하여 반원 형상의 폐쇄형 셀층을 형성하였다. 이후, 폐쇄형 셀층이 형성된 필름은 냉각을 거치면서 이송롤러를 통해 롤 형태로 권취하여 폐쇄형 셀층을 갖는 시트를 제조하였다. 그리고 제조된 폐쇄형 셀층을 갖는 시트의 제1 수지 필름층의 상면 및 제2 수지 필름층의 하면에 디지털 인쇄법으로 임의 형상을 프린팅하여 인쇄부를 형성하였다.Specifically, as the biodegradable resin constituting the first resin film layer and the second resin film layer, 90 wt% of PBAT and 9 wt% of PLA are used, and 0.5 wt% of a lubricant (Montan wax) as an additive, a primary antioxidant (Phenol-based) 0.3% by weight, and a secondary antioxidant (Phosphite-based) 0.2% by weight was mixed to prepare a biodegradable resin raw material. The prepared biodegradable resin raw material was inserted into the hopper of the sheet manufacturing apparatus, and then the first resin film and the second resin film were extruded by a T-die, respectively. The extruded second resin film was compressed on a molding roller having a closed semicircular shape as shown in FIG. 2 , and the first resin film was compressed on a flat roller without a shape. Thereafter, one surface of the second resin film and one surface of the first resin film were matched to each other to face each other, and then bonded to form a closed cell layer on the first resin film. At this time, the forming roller was adjusted so that the area ratio of the joined part (flat part) and the non-bonded part (closed semicircular shape) was 1: 4 based on the unit area of 1 m 2 of the flat cross-section to form a semicircular closed cell layer. Thereafter, the film having the closed cell layer was wound in a roll shape through a transfer roller while cooling to prepare a sheet having a closed cell layer. And a printed part was formed by digitally printing an arbitrary shape on the upper surface of the first resin film layer and the lower surface of the second resin film layer of the prepared sheet having a closed cell layer.
상기와 같이 제조된 실시예 1의 폐쇄형 셀층을 갖는 시트는 KS M ISO 14855-1 규격에 따라 측정된 생분해도가 98%이었다.The sheet having the closed cell layer of Example 1 prepared as described above had a biodegradability of 98% measured according to KS M ISO 14855-1 standard.
[실시예 2][Example 2]
폐쇄형 반원 형상의 성형롤러 대신 하기 도 3과 같은 폐쇄형 사각기둥 형상을 가진 성형롤러를 적용하고, 상기 성형롤러는 평단면 1㎡ 단위면적을 기준으로, 접합부(평탄부)와 비접합부(폐쇄형 사각기둥 형상)의 면적비가 1 : 7이 되도록 조절하여 압착한 것을 제외하고는, 상기 실시예 1과 동일한 방법을 실시하여 실시예 2의 폐쇄형 셀층을 갖는 시트를 제조하였다. A forming roller having a closed square column shape as shown in FIG. 3 is applied instead of a closed semicircular forming roller, and the forming roller is a junction (flat part) and a non-junction part (closed) A sheet having a closed cell layer of Example 2 was prepared in the same manner as in Example 1, except that the area ratio of the rectangular columnar shape) was adjusted to be 1:7 and compressed.
상기와 같이 제조된 실시예 2의 폐쇄형 셀층을 갖는 시트는 KS M ISO 14855-1 규격에 따라 측정된 생분해도가 98%이었다.The sheet having the closed cell layer of Example 2 prepared as described above had a biodegradability of 98% measured according to the KS M ISO 14855-1 standard.
[비교예 1][Comparative Example 1]
성형롤러를 이용하여 폐쇄형 셀층 제조시, 평단면 1㎡ 단위면적을 기준으로, 접합부(평탄부)와 비접합부(폐쇄형 반원 형상)의 면적비가 1 : 17이 되도록 조절하여 압착한 것을 제외하고는, 실시예 1과 동일한 조건으로 실시하여 비교예 1의 폐쇄형 셀층을 갖는 시트를 제조하였다. When manufacturing a closed cell layer using a forming roller, the area ratio of the joined (flat) and non-joined (closed semicircular) parts are adjusted to be 1:17 based on a unit area of 1 m2 of a flat cross-section, except for compression was carried out under the same conditions as in Example 1 to prepare a sheet having a closed cell layer of Comparative Example 1.
[비교예 2][Comparative Example 2]
성형롤러를 이용하여 폐쇄형 셀층 제조시, 평단면 1㎡ 단위면적을 기준으로, 접합부(평탄부)와 비접합부(폐쇄형 반원 형상)의 면적비가 1 : 0.5가 되도록 조절하여 압착한 것을 제외하고는, 상기 실시예 1과 동일한 조건으로 실시하여 비교예 2의 폐쇄형 셀층을 갖는 시트를 제조하였다. When manufacturing a closed cell layer using a forming roller, the area ratio of the joined (flat) and non-joined (closed semicircular) parts are adjusted to be 1: 0.5 based on a unit area of 1 m2 of a flat section, except for compression was carried out under the same conditions as in Example 1 to prepare a sheet having a closed cell layer of Comparative Example 2.
[평가예 1][Evaluation Example 1]
실시예 1 내지 2 및 비교예 1 내지 2에서 제조된 폐쇄형 셀층을 갖는 시트를 시편으로 사용하여 하기 물성을 평가하였으며, 그 결과를 하기 표 1에 나타내었다. The following physical properties were evaluated using the sheets having a closed cell layer prepared in Examples 1 and 2 and Comparative Examples 1 and 2 as specimens, and the results are shown in Table 1 below.
(1) 폐쇄형 셀의 손상 평가(1) Assessment of damage to closed cells
1㎡ 면적 기준으로 육안으로 식별하여 손상된 폐쇄형 셀의 개수에 따라 손상 정도를 평가하였다. 이때 손상 정도의 판정 기준은 하기와 같다. The degree of damage was evaluated according to the number of damaged closed cells by visual identification based on an area of 1 m 2 . In this case, the criteria for determining the degree of damage are as follows.
- 우수: 손상된 폐쇄형 셀의 개수가 없는 경우- Excellent: when there is no number of damaged closed cells
- 양호: 손상된 폐쇄형 셀의 개수가 5개 미만인 경우- Good: when the number of damaged closed cells is less than 5
- 보통: 손상된 폐쇄형 셀의 개수가 5개 이상 10개 미만인 경우 (경미 결함)- Moderate: when the number of damaged closed cells is more than 5 and less than 10 (minor defects)
- 불량: 손상된 폐쇄형 셀의 개수가 10개 이상인 경우 - Bad: When the number of damaged closed cells is more than 10
(2) 외부 충격 흡수 평가(2) Evaluation of external shock absorption
A4 용지 규격을 가진 2㎜ 두께의 유리판 위에 실시예 1 내지 2 및 비교예 1 내지 2에 따라 제조된 시트를 1장 덮은 후, 60㎝ 높이에서 중량 5㎏ 무게의 쇠구슬을 5회 낙하시켜 유리판 상에 파괴 정도를 하기 기준에 따라 평가하였다. After covering one sheet prepared according to Examples 1 and 2 and Comparative Examples 1 and 2 on a 2 mm thick glass plate having an A4 paper size, an iron ball weighing 5 kg in weight was dropped 5 times from a height of 60 cm to a glass plate The degree of destruction of the phase was evaluated according to the following criteria.
- 우수: 유리판 상에 손상된 횟수가 없는 경우- Excellent: When there is no damage on the glass plate
- 양호: 유리판 상에 손상된 횟수가 1~2회인 경우- Good: When the number of times of damage on the glass plate is 1-2 times
- 불량: 유리판 상에 손상된 횟수가 3~5회인 경우- Defective: When the glass plate has been damaged 3 to 5 times
실시예 1Example 1 실시예 2Example 2 비교예 1Comparative Example 1 비교예 2Comparative Example 2
폐쇄형 셀 형태 손상closed cell morphology 우수Great 우수Great 불량error 우수Great
외부 충격 흡수external shock absorption 우수Great 우수Great 불량error 불량error
실시예 1 내지 2에 따라 제조된 폐쇄형 셀층을 갖는 시트는, 폐쇄형 셀의 패턴이 유지되고 내구성이 우수하여 본 발명에서 목적하는 효과를 얻을 수 있음을 알 수 있었다. 이에 비해, 비교예 1에 따른 시트는 폐쇄형 셀 형상이 유지되지 않아 폐쇄형 셀층을 갖는 시트의 제조 자체가 근본적으로 불가하였다. 또한, 비교예 2에 따른 시트는, 당해 시트 상에 형성된 폐쇄형 셀이 평단면 1㎡ 단위면적 당 10개 미만으로 존재하므로, 실질적으로 이중(double layered) 수지층이 접합된 일반 필름과 유사하였다. 또한 폐쇄형 셀이 충분히 존재하지 않아 외부로부터의 충격이나 가혹한 외부 환경조건 하에서 변형이나 파손 등을 방지할 수 없음을 알 수 있었다.It was found that the sheet having the closed cell layer prepared according to Examples 1 and 2 could obtain the desired effect in the present invention because the closed cell pattern was maintained and the durability was excellent. On the other hand, in the sheet according to Comparative Example 1, the closed cell shape was not maintained, so it was fundamentally impossible to manufacture a sheet having a closed cell layer. In addition, the sheet according to Comparative Example 2 had less than 10 closed cells formed on the sheet per unit area of 1 m 2 of flat cross-section, so it was substantially similar to a general film to which a double layered resin layer was bonded. . In addition, it was found that it was not possible to prevent deformation or damage under harsh external environmental conditions or impact from the outside because the closed cell did not exist sufficiently.
[평가예 2][Evaluation Example 2]
실시예 1 및 2에 따른 생분해성 수지 원료로부터 제조된 필름 원단(두께 48㎛, 2 layer)을 사용하여 시편을 제조하였다. 각 시편의 물성을 하기와 같은 방법으로 평가하였으며, 그 결과를 하기 표 2에 나타내었다.Specimens were prepared using the film fabric (thickness 48㎛, 2 layers) prepared from the biodegradable resin raw material according to Examples 1 and 2. The physical properties of each specimen were evaluated in the following manner, and the results are shown in Table 2 below.
(1) 신장회복율: KS K 0642 8.16.2.D 법에 따라 측정하였다.(1) Elongation recovery rate: measured according to KS K 0642 8.16.2.D method.
(2) 동마찰계수: ASTM D 1894-11 법에 따라 측정하였다.(2) Dynamic friction coefficient: measured according to ASTM D 1894-11 method.
(3) 산소투과도: ASTM D 3985 법에 따라 측정하였으며, 시험 조건은 23.0±1 ℃에서 수행하였다.(3) Oxygen permeability: It was measured according to ASTM D 3985 method, and the test conditions were performed at 23.0±1 °C.
(4) 수증기 투과도: ASTM F 1249 법에 따라 측정하였으며, 시험 조건은 37.8±1 ℃, 100% R.H 하에서 수행하였다. (4) Water vapor permeability: It was measured according to ASTM F 1249 method, and the test conditions were 37.8±1° C., 100% R.H.
구분division 신장회복율(%)Elongation recovery rate (%) 동마찰 계수(μ)Dynamic friction coefficient (μ) 산소투과도oxygen permeability 수증기투과도Water vapor permeability
길이방향longitudinal direction 폭 방향width direction 건식deflation 습식wet cc/㎡·daycc/m² day g/㎡·dayg/m2 day
실시예 1Example 1 62.262.2 42.542.5 0.690.69 0.430.43 1041.31041.3 413.8413.8
실시예 2Example 2 63.063.0 43.243.2 0.680.68 0.410.41 1067.51067.5 389.9389.9
전술한 표 1 및 2에서 보는 바와 같이, 실시예 1 및 2에서 제조된 폐쇄형 셀층을 갖는 시트는 본 발명이 속하는 분야에서 요구하는 시트의 물성 수준을 동등 수준 이상으로 만족하여 외부로부터의 충격이나 가혹한 외부 환경조건에서도 변형이나 파손 등이 방지되고, 폐쇄형 셀의 형태 유지성을 구현할 수 있을 뿐만 아니라, 특정 이미지를 인쇄하여 식별력을 가질 수 있고, 친환경적인 장점을 가질 수 있음을 알 수 있었다.As shown in Tables 1 and 2 above, the sheets having a closed cell layer prepared in Examples 1 and 2 satisfy the physical property level of the sheet required in the field to which the present invention belongs at an equivalent level or higher, so that the It was found that deformation or damage can be prevented even in harsh external environmental conditions, and shape maintenance of a closed cell can be implemented, and a specific image can be distinguished by printing, and it can have eco-friendly advantages.
이상에서는 본 발명을 특정의 바람직한 실시예를 들어 도시하고 설명하였으나, 본 발명은 상기한 실시예에 한정되지 않으며 본 발명의 기술사상을 벗어나지 않는 범위 내에서 다양한 변경과 수정이 가능함은 물론이다.In the above, the present invention has been illustrated and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments and various changes and modifications are possible without departing from the technical spirit of the present invention.

Claims (10)

  1. 제1 수지 필름층; a first resin film layer;
    상기 제1 수지 필름층의 일면에 형성되고, 소정 간격으로 이격된 복수의 폐쇄형 셀을 포함하는 셀층; 및a cell layer formed on one surface of the first resin film layer and including a plurality of closed cells spaced apart from each other at a predetermined interval; and
    상기 제1 수지 필름층의 적어도 일면에 형성되고, 소정의 색상 또는 무늬를 갖는 인쇄부;를 포함하며,and a printing unit formed on at least one surface of the first resin film layer and having a predetermined color or pattern;
    당해 셀층의 평단면 1㎡ 면적을 기준으로, 상기 복수의 폐쇄형 셀(A)의 총 면적은 상기 폐쇄형 셀을 제외한 나머지 셀층(B)의 총 면적보다 큰 것인, 폐쇄형 셀층을 갖는 시트. A sheet having a closed cell layer, wherein the total area of the plurality of closed cells (A) is larger than the total area of the remaining cell layers (B) excluding the closed cells based on the area of 1 m 2 of the flat cross-section of the cell layer .
  2. 제1항에 있어서, According to claim 1,
    상기 복수의 폐쇄형 셀(A)의 총 면적과, 상기 복수의 폐쇄형 셀을 제외한 나머지 셀층(B)의 총 면적의 비율은 2 내지 15 : 1 인, 폐쇄형 셀층을 갖는 시트. A sheet having a closed cell layer, wherein a ratio of the total area of the plurality of closed cells (A) to the total area of the remaining cell layers (B) excluding the plurality of closed cells is 2 to 15:1.
  3. 제1항에 있어서, The method of claim 1,
    상기 셀층은, The cell layer is
    상기 제1 수지 필름층의 일면 상에 제2 수지 필름층의 일면이 합지되어 융착된 접합부; 및 a bonding portion in which one surface of the second resin film layer is laminated on one surface of the first resin film layer and fused; and
    상기 제1 수지 필름층과 상기 제2 수지 필름층이 비융착되어 이들 사이에 공기로 밀봉된 폐쇄형 셀이 형성된 비(非)접합부;a non-bonding portion in which the first resin film layer and the second resin film layer are not fused to form a closed cell sealed with air therebetween;
    를 포함하는, 폐쇄형 셀층을 갖는 시트.A sheet having a closed cell layer, comprising:
  4. 제1항에 있어서, The method of claim 1,
    상기 셀층은, 복수의 폐쇄형 셀이 반복 배열하여 형성된 소정의 양각 패턴을 포함하는, 폐쇄형 셀층을 갖는 시트.The cell layer includes a predetermined embossed pattern formed by repeatedly arranging a plurality of closed cells, a sheet having a closed cell layer.
  5. 제4항에 있어서, 5. The method of claim 4,
    상기 양각 패턴의 수평 단면 형상은 원형, 반원형, 부채꼴형 및 다각형으로 이루어진 군에서 선택되는 폐쇄형 셀층을 갖는 시트.The horizontal cross-sectional shape of the embossed pattern is a sheet having a closed cell layer selected from the group consisting of a circular shape, a semicircle shape, a sector shape, and a polygonal shape.
  6. 제1항에 있어서, According to claim 1,
    상기 제1 수지 필름층 및 셀층 중 적어도 하나는 생분해성 고분자를 포함하는, 폐쇄형 셀층을 갖는 시트.At least one of the first resin film layer and the cell layer comprises a biodegradable polymer, the sheet having a closed cell layer.
  7. 제6항에 있어서, 7. The method of claim 6,
    상기 생분해성 고분자는 전분, 셀룰로오스, 키틴, PLA(polylactide), PHA(polyhydroxyalkanoates), PCL(poly ε-caprolactone), PBAT(Polybutylene adipate terephthalate), PGA(polyglycolacid), AP(aliphaticpolyester), PHBV(P(3-hydroxybutyrate-co 3-hydroxy valerate)), 및 PBS(Polybutylene Succinate)로 이루어진 군에서 선택되는 1종 이상을 포함하는 폐쇄형 셀층을 갖는 시트. The biodegradable polymer is starch, cellulose, chitin, PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ε-caprolactone), PBAT (Polybutylene adipate terephthalate), PGA (polyglycolacid), AP (aliphatic polyester), PHBV (P (P) A sheet having a closed cell layer comprising at least one selected from the group consisting of 3-hydroxybutyrate-co 3-hydroxy valerate) and PBS (Polybutylene Succinate).
  8. 제1항에 있어서, The method of claim 1,
    상기 인쇄부는, The printing unit,
    상기 제1 수지 필름층의 타면 상에 형성되거나, It is formed on the other surface of the first resin film layer, or
    상기 셀층과 접촉하는 상기 제1 수지 필름층의 일면 상에 형성되거나, 또는 is formed on one surface of the first resin film layer in contact with the cell layer, or
    이들 모두에 형성되는, 폐쇄형 셀층을 갖는 시트. A sheet having a closed cell layer formed on all of them.
  9. 제1항에 있어서, According to claim 1,
    상기 인쇄부는, 상기 제1 수지 필름층의 타면 상에 소정의 색상 또는 무늬가 인쇄된 프린팅층을 적층하여 형성되는, 폐쇄형 셀층을 갖는 시트.The printing unit, the sheet having a closed cell layer is formed by laminating a printing layer printed with a predetermined color or pattern on the other surface of the first resin film layer.
  10. 제9항에 있어서, 10. The method of claim 9,
    상기 프린팅층은 전분, 셀룰로오스, 키틴, PLA(polylactide), PHA(polyhydroxyalkanoates), PCL(poly ε-caprolactone), PBAT(Polybutylene adipate terephthalate), PGA(polyglycolacid), AP(aliphaticpolyester), PHBV(P(3-hydroxybutyrate-co 3-hydroxy valerate)), PBS(Polybutylene Succinate) 및 이들의 조합으로 이루어진 군에서 선택되는 1종 이상의 생분해성 고분자를 포함하는, 폐쇄형 셀층을 갖는 시트.The printing layer is starch, cellulose, chitin, PLA (polylactide), PHA (polyhydroxyalkanoates), PCL (poly ε-caprolactone), PBAT (polybutylene adipate terephthalate), PGA (polyglycolacid), AP (aliphaticpolyester), PHBV (P(3) -hydroxybutyrate-co 3-hydroxy valerate)), PBS (Polybutylene Succinate), and a sheet having a closed cell layer comprising at least one biodegradable polymer selected from the group consisting of combinations thereof.
PCT/KR2021/017721 2020-11-27 2021-11-29 Sheet having closed cell layer WO2022114879A1 (en)

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KR20200163015 2020-11-27
KR10-2020-0163015 2020-11-27
KR1020210165529A KR20220074778A (en) 2020-11-27 2021-11-26 Sheet having closed cell layer
KR10-2021-0165529 2021-11-26

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3111029U (en) * 2004-11-29 2005-07-07 充 石垣 Plastic foam sheet
JP2011025979A (en) * 2009-07-28 2011-02-10 Ube Film Kk Cellular cushioning sheet
KR20160001991A (en) * 2014-06-30 2016-01-07 주식회사 가람브이엔씨 Air-Cap Packing Sheet and, Apparatus and Method for making thereof
KR20180003979A (en) * 2016-07-01 2018-01-10 씨제이제일제당 (주) A bio plastic film, air cap and an air cap product using therefrom
KR20190025337A (en) * 2017-09-01 2019-03-11 주식회사 휴비스 Sound Blocking Material For Vehicle Containing Polyester Foam Sheet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3111029U (en) * 2004-11-29 2005-07-07 充 石垣 Plastic foam sheet
JP2011025979A (en) * 2009-07-28 2011-02-10 Ube Film Kk Cellular cushioning sheet
KR20160001991A (en) * 2014-06-30 2016-01-07 주식회사 가람브이엔씨 Air-Cap Packing Sheet and, Apparatus and Method for making thereof
KR20180003979A (en) * 2016-07-01 2018-01-10 씨제이제일제당 (주) A bio plastic film, air cap and an air cap product using therefrom
KR20190025337A (en) * 2017-09-01 2019-03-11 주식회사 휴비스 Sound Blocking Material For Vehicle Containing Polyester Foam Sheet

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