WO2005016774A1 - Film presentant des protuberances de hauteurs differentes, procede de realisation et sac sous vide realise a partir de ce film - Google Patents

Film presentant des protuberances de hauteurs differentes, procede de realisation et sac sous vide realise a partir de ce film Download PDF

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Publication number
WO2005016774A1
WO2005016774A1 PCT/KR2003/001861 KR0301861W WO2005016774A1 WO 2005016774 A1 WO2005016774 A1 WO 2005016774A1 KR 0301861 W KR0301861 W KR 0301861W WO 2005016774 A1 WO2005016774 A1 WO 2005016774A1
Authority
WO
WIPO (PCT)
Prior art keywords
protrusions
sealing
heat
resin layer
recesses
Prior art date
Application number
PCT/KR2003/001861
Other languages
English (en)
Inventor
Wan Hyuk Yoon
Original Assignee
Wan Hyuk Yoon
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020030056319A external-priority patent/KR100573738B1/ko
Priority claimed from KR1020030063299A external-priority patent/KR100614463B1/ko
Application filed by Wan Hyuk Yoon filed Critical Wan Hyuk Yoon
Priority to AU2003261641A priority Critical patent/AU2003261641A1/en
Publication of WO2005016774A1 publication Critical patent/WO2005016774A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • 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
    • B32B3/30—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 formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2007—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
    • B65D81/2038—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum with means for establishing or improving vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/002—Flexible containers made from webs by joining superimposed webs, e.g. with separate bottom webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2170/00—Construction of flexible containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2170/00—Construction of flexible containers
    • B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • 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
    • B32B2329/00—Polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals
    • B32B2329/04—Polyvinylalcohol
    • 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
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • 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
    • B32B2377/00—Polyamides
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • B32B2439/46—Bags

Definitions

  • the present invention relates, in general, to sealing films, and manufacturing methods thereof and sealing bags using the same. More specifically, the present invention is directed to a sealing film, a method of manufacturing the same, and a sealing bag using the same, characterized in that two-floor protrusions are formed on the sealing film, whereby a total floor area of the protrusions becomes wider and an output flux of air increases, and, as well, sizes and arrangements of the protrusions are irregularly formed, thus realizing various patterns .
  • a conventional sealing bag 500 including an upper sheet 200 and a lower sheet 300 each having both surfaces made of a plastic material. Further, to form an internal chamber receiving contents to be stored, both side edges and lower edges of the upper sheet 200 and the lower sheet 300 are thermally seamed to form a seamed part S.
  • upper edges of the upper sheet 200 and the lower sheet 300 are open to form an open part 400.
  • the inner surfaces of the sealing bag 500 are made of a thermoplastic resin, such as polyethylene, capable of being melted while being non-toxic to humans, and the outer surfaces of the sealing bag 500 include a multi- layered structure formed of a blockable material, such as nylon, for storage of long periods after the vacuum treatment .
  • the storing contents are received into the sealing bag 500 through the open part 400 of the sealing bag 500, after which air in the bag 500 is ejected by use of an air pump or other vacuum units, whereby the internal chamber of the sealing bag 500 gets to the state of vacuum.
  • the open part 400 is heated to be higher than predetermined temperatures, and compressed and seamed.
  • the bag 500 is sealed by use of the vacuum unit, while air of the upper portion of the bag 500, present near the vacuum unit, is suddenly ejected, the upper sheet 200 and the lower sheet 300 constituting the bag 500 are mutually seamed (this is called ⁇ early collapse' ) .
  • the complete vacuum state of the internal chamber of the bag 500 cannot be achieved due to residual air of the lower portion of the bag 500, and it is difficult to store the contents .
  • technigues for forming an air passage by subjecting the film made of a thermoplastic material to an embossing treatment have been developed.
  • the film having air passages is disclosed in U.S. Patent Nos. 2,778,171, 3,311,517, and RE34,929.
  • the known technigues disclose air passages 26 formed only by protrusions 22 having regular heights, intervals and shapes, as shown in FIG. 2.
  • a vacuum performance becomes inferior, and thus it is difficult to realize various patterns.
  • the vacuum performance depends on the heights, arrangement structures and total floor areas of the protrusions.
  • the protrusions are formed to aid the natural flow of air in the bag, they are preferably arranged so that respective air passages are linearly connected to the open part of the bag. Also, an output flux of air per unit time is proportional to the total floor area of the protrusions. Thus, as the total floor area of the protrusions is wider, the output rate of the internal air becomes faster.
  • an aspect of the present invention is to alleviate the problems encountered in the related art and to provide a sealing film, characterized by having an enlarged total floor area of protrusions, so that an early collapse does not occur upon a vacuum treatment by use of a vacuum unit, thereby improving a vacuum performance.
  • Another aspect of the present invention is to provide a sealing film, characterized by having irregularly arranged protrusions thereon, thereby realizing various patterns, and functioning to increase productivity of a sealing bag according to a variety of needs of the users.
  • a still another aspect of the present invention is to provide a sealing bag using the sealing film.
  • a further aspect of the present invention is to provide a method of manufacturing the sealing film.
  • a sealing film having two- floor protrusions including a base layer, and a heat- sealing resin layer laminated on the base layer and having protrusions on an inner surface of the heat- sealing resin layer to form air passages, wherein the protrusions have firs:; protrusions, and second protrusions having a height higher than that of the first protrusions.
  • the first protrusions and the second protrusions have an irregular arrangement structure which is not oriented in any specific direction, to realize various patterns.
  • the first protrusions and the second protrusions have various sizes.
  • the first protrusions and the second protrusions have irregular shapes.
  • the patterns comprise the shapes of fruits, animals, plants, characters, or diagrams .
  • the first protrusions each are 0.8-1.5 times thicker than a thickness of the heat-sealing resin layer.
  • the second protrusions each are 1.0-2.0 times thicker than a thickness of the heat-sealing resin layer.
  • the sealing film further comprises an adhesive layer between the base layer and the heat-sealing resin layer .
  • the base layer comprises polyamide, polyester, or ethylene vinyl alcohol.
  • the base layer comprises a multi-layered structure including at least one layer.
  • the heat-sealing resin layer comprises polyethylene.
  • a surface of the heat- sealing resin layer comprises a flat part which is not embossed, first protrusions and second protrusions.
  • a surface of the heat- sealing resin layer comprises first protrusions and second protrusions.
  • a sealing bag including an upper sheet and a lower sheet superimposed mutually, in which lower edges and both side edges of the upper sheet and the lower sheet are seamed to form an internal chamber of the sealing bag, and upper edges of the upper sheet and the lower sheet are open to form an open part to receive contents into the sealing bag, and at least one of the upper sheet and the lower sheet includes the sealing film as mentioned above.
  • a method of manufacturing a sealing film including the following steps of melt-extruding a heat-sealing resin layer on a base layer made of an air-impermeable material through a nozzle of a T-die extruder, to prepare a film, and passing the film through a layering unit with a recessed roll having recesses and a cooling roll, wherein the recessed roll of the layering unit has first recesses and second recesses, and thus the heat- sealing resin layer has --.i-r-st protrusions and second protrusions on an inner 'surface thereof, corresponding to each position of the first recesses and the second recesses of the recessed roll, to form air passages.
  • a method of manufacturing a sealing film including the following steps of passing a heat-sealing resin layer through a protrusion-forming unit with a recessed roll having recesses and a flat roll, to form protrusions on an inner surface of the heat-sealing resin layer, and passing a base layer made of an air-impermeable material and the heat-sealing resin layer with protrusions through a layering unit with two layering rolls, wherein the recessed roll of the protrusion- forming unit has first recesses and second recesses, whereby the heat-sealing re ⁇ in layer passed through the protrusion-forming unit has first protrusions and second protrusions on an inner surface of the heat- sealing resin layer, corresponding to each position of the first recesses and the second recesses of the recessed roll, to form air passages.
  • the first recesses and the second recesses of the recessed roll have an irregular arrangement structure which is not oriented in any specific direction, to realize various patterns on the inner surface of the heat-sealing resin layer.
  • the first recesses and the second recesses of the recessed roll have various sizes .
  • the first recesses and the second recesses of the recessed roll have irregular shapes .
  • FIG. 1 is a perspective view of a conventional sealing bag
  • FIG. 2 is a perspective view of another conventional sealing bag
  • FIG. 3 is a perspective view of a sealing bag using a sealing film of the present invention
  • FIG. 4 is a perspective view of a sealing film, according to a first embodiment of the present invention
  • FIG. 5 is an exploded view of a part of the sealing film shown in FIG. 4
  • FIG. 6 is a perspective view of a sealing film, according to a second embodiment of the present invention
  • FIG. 7 is an exploded view of a part of the sealing film shown in FIG.. 6
  • FIG. 8a to 8q are bottom views of various patterns formed on an inner surface of the sealing film of the present invention.
  • FIG. 9 is a view to show a process of manufacturing the sealing film, according to an embodiment of the present invention.
  • FIG. 10 is a view to show a process of manufacturing the sealing film, according to another embodiment of the present invention.
  • FIG. 3 there is a perspective view of a sealing bag using a sealing film of the present invention.
  • the sealing bag 500 includes an upper sheet 200, and a lower sheet 300 having a size corresponding to that of the upper sheet 200.
  • lower edges and both side edges of the upper sheet 200 and the lower sheet 300 are seamed to form an internal chamber of the sealing bag 500, and upper edges of the upper sheet 200 and the lower sheet 300 are open to form an open part 400, which is used to receive contents into the sealing bag 500.
  • the lower sheet 300 of the sealing bag 500 includes two or more layers, and preferably, five layers, of polyamide and polyethylene layered alternately.
  • the lower sheet 300 having five layers has a thickness of 60-100 ⁇ m, in which polyamide for use in blocking gas is 15-20 ⁇ m thick, and polyethylene is 40- 50 ⁇ m thick.
  • FIG. 4 is a perspective view of a sealing film
  • FIG. 5 is an exploded view of a part of the sealing film shown in FIG. 4.
  • a plurality of the first protrusions 22a being 60 ⁇ m high with a cylindrical shape are formed.
  • 9 second protrusions 22b being 80 ⁇ m high are bundled at a central portion of the first protrusions, to form a total pattern shape resembling that of human eyes.
  • the upper sheet 200 of the sealing bag 500 includes a base layer 10 and a heat-sealing resin layer 20 laminated on the base layer 10.
  • the upper sheet 200 is layered by means of a dry- laminating process or a T-die process. According to the dry-laminating process, an adhesive layer is inserted into the base layer 10 and the heat-sealing resin layer' 20.
  • the adhesive layer is preferably made of polyethylene .
  • the upper sheet 200 includes two layers, which are a base layer 10 and a heat-sealing resin layer 20 .laminated on the base layer 10.
  • the base layer 10 is 20 ⁇ m thick, and the heat- sealing resin layer 20 is 40-60 ⁇ m thick.
  • the upper sheet 200 having the thickness not less than 60 ⁇ m can be manufactured.
  • the base layer 10 is preferably made of polyamide, polyester, or ethylene vinyl alcohol (EVOH) . More preferably, the base layer 10 is made of polyamide.
  • the heat-sealing resin layer 20 is made of polyethylene. This is because the protrusions 22 can be easily formed on the inner surface of the resin layer 20 made of polyethylene as a thermoplastic resin.
  • the protrusions 22 are formed only on the upper sheet 200. However, the protrusions 22 may be formed on an inner surface of the lower sheet 300.
  • the surface of the heat-sealing resin layer 20 includes the flat part 24 without embossments, the first protrusions 22a and the second protrusions 22b, the shape of the mouth or eyes of the smiling face shown in FIG. 4 or 5 is not distinctly viewed. However, a total floor area of the protrusions 22 is enlarged, thus improving the vacuum speed and vacuum performance.
  • FIG. 6 is a perspective view of a sealing film, according to a second embodiment of the present invention, in which a surface of a heat-sealing resin layer 20 of the sealing film includes only first protrusions 22a and second protrusions 22b.
  • the shapes of smiling faces of humans is formed on the surface of the heat-sealing resin layer 20.
  • the second protrusions 22b are responsible for the total shapes of smiling faces of humans, and the first protrusions 22a are formed on the portions of the eye and mouth and the portion outside the smiling face at heights lower than those of the second protrusions 22b. Thereby, the shape of the smiling face is realized.
  • FIG. 7 is an exploded view of a part of the sealing film shown in FIG. 6.
  • a plurality of first protrusions 22a are formed as 50 ⁇ m high cylinders, and a plurality of second protrusions 22b being 80 ⁇ m high are formed.
  • the portion formed with the second protrusions 22b is shown as embossments, and the portion formed with the first protrusions 22a is relatively shown as depressions.
  • first protrusions 22a and the second protrusions 22b have an irregular arrangement structure which is not oriented in any specific direction, whereby a whole pattern is variously formed.
  • conventional protrusions have a regular pattern and various patterns cannot be reliably formed on an upper sheet
  • the protrusions 22 are irregularly arranged in the present invention, thereby realizing various designs.
  • FIGS. 8a to 8m shov. various patterns by two-floor protrusions formed on the upper sheet 200, in which the two-floor protrusions have an irregular arrangement structure.
  • FIG. 8a shows the shape of clovers patterned on an inner surface of a heat-scaling resin layer of the upper sheet, and FIG.
  • FIG. 8b shows the shape of conchs patterned on an inner surface of a heat-sealing resin layer of the upper sheet.
  • FIG. 8c shows the shape of ships patterned on an inner surface of a heat-sealing resin layer of the upper sheet, and
  • FIG. &d shows the shape of leaves patterned on an inner surface of a heat-sealing resin layer of the upper sheet.
  • FIG. 8e shows the shape of flowers patterned on an inner surface of a heat-sealing resin layer of the upper sheet, and
  • FIG. 8f shows the shape of cosmos patterned on an inner surface of a heat-sealing resin Layer of the upper sheet.
  • FIG. 8c shows the shape of ships patterned on an inner surface of a heat-sealing resin layer of the upper sheet
  • FIG. &d shows the shape of leaves patterned on an inner surface of a heat-sealing resin layer of the upper sheet.
  • FIG. 8e shows the shape of flowers patterned on an inner surface of
  • FIG. 8g shows the shape of Christmas trees patterned on an inner surface of a heat-sealing resin layer of the upper sheet
  • FIG. 8h shows the shape of orchids patterned on an inner surface of a heat-sealing resin layer of the upper sheet
  • FIG. 8i shows the shape of petals patterned on an inner surface of a heat-sealing resin layer of the upper sheet
  • FIG. 8j shows the shape of turf patterned on an inner surface of a heat-sealing resin layer of the upper sheet
  • FIG. 8k shows the shape of fish and marine plants patterned on an inner surface of a heat-sealing resin layer of the upper sheet
  • FIGS. 8a to 8m show the shape of autumnal leaves patterned on an inner surface of a heat-sealing resin layer of the upper sheet.
  • FIGS. 8a to 8m various patterns may be realized by the flat part which is not subjected to an embossing treatment, the first protrusions and the second protrusions.
  • FIG. 8n shows the shape of bamboo patterned on an inner surface of a heat-sealing resin layer of the upper sheet
  • FIG. 8o shows the shape of ancient characters patterned on an inner surface of a heat-sealing resin layer of the upper sheet.
  • a sealing film 100 of the present invention is manufactured according to a dry-laminating process or a T-die process.
  • FIG. 9 shows the dry-laminating process of manufacturing the sealing film 100.
  • a heat- sealing resin layer 20 having first protrusions and second protrusions on an inner surface thereof is previously prepared as follows.
  • the heat-sealing resin layer 20 made of polyethylene is passed through a protrusion-forming unit 600 including a recessed roll 610 with recesses and a flat roll 620, protrusions 22 are formed on the inner surface of the heat-sealing resin layer 20.
  • the recessed roll 610 of the protrusion-forming unit 600 has first recesses and second recesses.
  • the resin layer 20 is passed through the protrusion-forming unit 600, whereby first protrusions and second protrusions are formed on the inner surface of the resin layer 20, corresponding to each position of the first recesses and the second recesses of the recessed roll 610. Further, air passages are formed.
  • the first recesses and the second recesses of the recessed roll 610 have an irregular arrangement structure which is not oriented in any specific direction. Therefore, various patterns can be wholly formed on the inner surface of the heat-sealing resin layer 20.
  • the first recesses and the second recesses of the recessed roll 610 have various sizes, and, as well, irregular shapes.
  • a base layer 10 made of an air- impermeable material is passed through a layering unit 700 with two layering rolls.
  • an adhesive 32 is introduced into the base layer 10 and the heat-sealing resin layer 20.
  • the base layer 10 is adhered to the heat-sealing resin layer with the two-floor protrusions, and an adhesive layer is intercalated into the base layer 10 and the heat-sealing resin layer 20.
  • the thickness of the base layer 10 and the heat-sealing resin layer 20 is not limited, and thus the sealing film 100 having various thicknesses can be manufactured.
  • FIG. 10 shows the T-die process for use in the preparation of the sealing film.
  • a heat-sealing resin layer 20 is melt-extruded on a base layer 10 made of an air-impermeable material through a nozzle 832 of a T-die extruder 830, and then passed through a layering unit 800 with a recessed roll 810 having recesses and a cooling roll 820, thereby obtaining a desired sealing film.
  • the recessed roll 810 of the layering unit 800 has first and second recesses-.
  • the heat-sealing resin layer 20 has first and second protrusions on the inner surface thereof, corresponding to each position of the first and second recesses of the recessed roll 810.
  • air passages are formed. It is preferred thai- the first and second recesses of the recessed roll 810 have various sizes and irregular shapes.
  • the present invention provides a sealing film, a manuf cturing method thereof and a sealing bag using the same, which is advantageous in that two-floor protrusions are formed on the sealing film, whereby a total floor area of the protrusions becomes wider and an output flux of air increases.
  • an internal chamber of the sealing bag can be easily made to the state of vacuum. Further, arrangements, sizes and shapes of the protrusions are irregularly formed, thereby realizing various patterns. Therefore, productivity of end products is increased according to a variety of needs of the users.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne un film hermétique présentant des protubérances à deux étages, un procédé pour le réaliser, et un sac hermétique réalisé à partir de ce film. Le film hermétique comprend une couche de base et une couche de résine étanche à la chaleur, laminée sur la couche de base et présentant des protubérances sur sa face intérieure de façon à constituer des passages d'air. Selon l'invention, les protubérances comprennent de premières protubérances et de secondes protubérances qui ont une hauteur supérieure à celle des premières protubérances. De plus, les premières et les secondes protubérances ont une structure irrégulière qui n'est orientée dans aucune direction spécifique, ce qui permet d'obtenir différents motifs. En ce qui concerne le film hermétique, les protubérances sont disposées sur deux étages et ont une surface d'étage totale accrue, ce qui permet d'augmenter le flux de sortie d'air, et de constituer de manière simple un compartiment interne de sac hermétique sous vide. De plus, la taille et la disposition des protubérances sont irrégulières, ce qui permet la formation de différents motifs et l'augmentation de la productivité de produits finis correspondant aux besoins des utilisateurs.
PCT/KR2003/001861 2003-08-14 2003-09-15 Film presentant des protuberances de hauteurs differentes, procede de realisation et sac sous vide realise a partir de ce film WO2005016774A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003261641A AU2003261641A1 (en) 2003-08-14 2003-09-15 Film with different heght of protuberances, manufacturing method and vacuum bag using thereof

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2003-0056319 2003-08-14
KR1020030056319A KR100573738B1 (ko) 2003-08-14 2003-08-14 2중 돌기가 형성된 진공포장용 필름의 제조방법
KR10-2003-0063299 2003-09-09
KR1020030063299A KR100614463B1 (ko) 2003-09-09 2003-09-09 다층돌기가 형성된 진공포장용 필름, 이 필름을 이용한진공포장용 백

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Publication Number Publication Date
WO2005016774A1 true WO2005016774A1 (fr) 2005-02-24

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7438473B2 (en) 2004-06-29 2008-10-21 The Glad Products Company Flexible storage bag
US7597479B2 (en) 2005-01-20 2009-10-06 The Glad Products Company Storage bag with fluid separator
US7857514B2 (en) 2006-12-12 2010-12-28 Reynolds Foil Inc. Resealable closures, polymeric packages and systems and methods relating thereto
US8397958B2 (en) 2010-08-05 2013-03-19 Ds Smith Plastics Limited Closure valve assembly for a container
US8419279B2 (en) 2004-06-29 2013-04-16 The Glad Products Company Flexible storage bag

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5549944A (en) * 1993-10-13 1996-08-27 Abate; Luigi F. Tubular element for the formation of bags for the vacuum-packing of products
US20030136798A1 (en) * 2001-11-09 2003-07-24 Michael Wilford Flexible plastic container
US20030155269A1 (en) * 2001-02-21 2003-08-21 Kyul-Joo Lee Method for preparing air channel-equipped film for use in vacuum package

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5549944A (en) * 1993-10-13 1996-08-27 Abate; Luigi F. Tubular element for the formation of bags for the vacuum-packing of products
US20030155269A1 (en) * 2001-02-21 2003-08-21 Kyul-Joo Lee Method for preparing air channel-equipped film for use in vacuum package
US20030136798A1 (en) * 2001-11-09 2003-07-24 Michael Wilford Flexible plastic container

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7438473B2 (en) 2004-06-29 2008-10-21 The Glad Products Company Flexible storage bag
US7726880B2 (en) 2004-06-29 2010-06-01 The Glad Products Company Flexible storage bag
US7798714B2 (en) 2004-06-29 2010-09-21 The Clorox Company Flexible storage bag
US8061899B2 (en) 2004-06-29 2011-11-22 The Glad Products Company Storage bag
US8419279B2 (en) 2004-06-29 2013-04-16 The Glad Products Company Flexible storage bag
US7597479B2 (en) 2005-01-20 2009-10-06 The Glad Products Company Storage bag with fluid separator
US7857514B2 (en) 2006-12-12 2010-12-28 Reynolds Foil Inc. Resealable closures, polymeric packages and systems and methods relating thereto
US8397958B2 (en) 2010-08-05 2013-03-19 Ds Smith Plastics Limited Closure valve assembly for a container
US8820591B2 (en) 2010-08-05 2014-09-02 Ds Smith Plastics Limited Closure valve assembly for a container
US8973789B2 (en) 2010-08-05 2015-03-10 Ds Smith Plastics Limited Closure valve assembly for a container

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