KR20100047714A - Porous film and manufacturing method thereof - Google Patents
Porous film and manufacturing method thereof Download PDFInfo
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- KR20100047714A KR20100047714A KR1020080106730A KR20080106730A KR20100047714A KR 20100047714 A KR20100047714 A KR 20100047714A KR 1020080106730 A KR1020080106730 A KR 1020080106730A KR 20080106730 A KR20080106730 A KR 20080106730A KR 20100047714 A KR20100047714 A KR 20100047714A
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- South Korea
- Prior art keywords
- film
- breathable film
- breathable
- adhesive
- medical
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 239000000853 adhesive Substances 0.000 claims abstract description 49
- 230000001070 adhesive effect Effects 0.000 claims abstract description 49
- 230000035699 permeability Effects 0.000 claims abstract description 39
- 239000000203 mixture Substances 0.000 claims abstract description 25
- 150000001875 compounds Chemical class 0.000 claims abstract description 18
- 238000010030 laminating Methods 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 4
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- 229910003475 inorganic filler Inorganic materials 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 6
- 238000004898 kneading Methods 0.000 claims description 5
- 229920005672 polyolefin resin Polymers 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
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- 235000019634 flavors Nutrition 0.000 claims 1
- 235000013355 food flavoring agent Nutrition 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000003205 fragrance Substances 0.000 description 16
- GXDHCNNESPLIKD-UHFFFAOYSA-N 2-methylhexane Natural products CCCCC(C)C GXDHCNNESPLIKD-UHFFFAOYSA-N 0.000 description 12
- 230000000704 physical effect Effects 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000011148 porous material Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 229920002472 Starch Polymers 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 229920000092 linear low density polyethylene Polymers 0.000 description 4
- 239000004707 linear low-density polyethylene Substances 0.000 description 4
- 229920001684 low density polyethylene Polymers 0.000 description 4
- 239000004702 low-density polyethylene Substances 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 244000178231 Rosmarinus officinalis Species 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000001023 inorganic pigment Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000012860 organic pigment Substances 0.000 description 2
- 239000002304 perfume Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 229920000346 polystyrene-polyisoprene block-polystyrene Polymers 0.000 description 2
- 229920006132 styrene block copolymer Polymers 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 244000178870 Lavandula angustifolia Species 0.000 description 1
- 235000010663 Lavandula angustifolia Nutrition 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 244000131316 Panax pseudoginseng Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 244000269722 Thea sinensis Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000011363 dried mixture Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229920005676 ethylene-propylene block copolymer Polymers 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 235000009569 green tea Nutrition 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000005001 laminate film Substances 0.000 description 1
- 239000001102 lavandula vera Substances 0.000 description 1
- 235000018219 lavender Nutrition 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 229920004889 linear high-density polyethylene Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
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- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001083 polybutene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002742 polystyrene-block-poly(ethylene/propylene) -block-polystyrene Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
- B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F7/00—Heating or cooling appliances for medical or therapeutic treatment of the human body
- A61F7/02—Compresses or poultices for effecting heating or cooling
- A61F2007/0244—Compresses or poultices for effecting heating or cooling with layers
- A61F2007/0258—Compresses or poultices for effecting heating or cooling with layers with a fluid permeable layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0065—Permeability to gases
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
본 발명은 의료용으로 사용되는 통기성 필름 및 이의 제조방법에 관한 것으로, 통기도가 일반 통기성필름에 비해 낮으며, 그 편차가 적은 통기성필름 및 이의 제조방법에 관한 것이다.The present invention relates to a breathable film used for medical purposes and a method for manufacturing the same, and has a lower air permeability than a general breathable film, and less variation in the breathable film and a method for manufacturing the same.
현재 핫팩은 의료용 및 미용용 등 다양한 분야에 사용되고 있으며, 원리는 다음과 같다.Currently, hot packs are used in various fields such as medical and cosmetics, and the principle is as follows.
CaO + H2O -> Ca(OH)2 + △CaO + H 2 O-> Ca (OH) 2 + △
즉, 산화칼슘이 공기 중의 수분과 접촉하게 되면 열이 발생하게 되는데, 접촉되는 공기의 양이 많을수록 더 높은 열이 발생된다. 따라서, 상기 산화칼슘의 발열 정도를 제어하기 위해서 통기성 필름이 사용되고 있다. That is, when calcium oxide comes into contact with moisture in the air, heat is generated. The higher the amount of air contacted, the higher the heat is generated. Therefore, in order to control the exothermic degree of the said calcium oxide, the breathable film is used.
의료용 핫팩의 경우 인체에 직접 닿게 되는 것이므로 과도한 발열은 화상을 줄 수 있으므로 통상의 통기성필름에 비하여 낮은 통기도를 갖는 필름이 요구되며, 그 편차가 적은 통기성 필름이 요구되고 있다. In the case of a medical hot pack, since excessive heat may cause burns because a direct contact with a human body is required, a film having a lower air permeability is required than a conventional breathable film, and a breathable film having less variation is required.
그러나 통상의 통기성 필름 제조 방법은 필름의 전폭이 일정한 통기도를 갖도록 제조하기 어려우며, 연신 후 다시 수축하려는 수지의 성질에 의해 제조된 통기성 필름의 폭에 대해 가운데 부분과 양 끝단 부분의 통기도가 차이가 나게 된다. 따라서 일반적으로 제조된 통기성 필름의 경우 편차가 ±500g/㎡24hr 정도로 매우 크게 되며, 이러한 경우 의료용 핫팩 등에 사용하기에는 어려운 문제점이 있었다.However, the conventional breathable film manufacturing method is difficult to manufacture so that the full width of the film has a constant ventilation, the air permeability of the middle portion and both ends is different with respect to the width of the breathable film produced by the nature of the resin to shrink again after stretching. do. Therefore, in the case of a generally manufactured breathable film, the deviation becomes very large as ± 500g / m 2 24hr, in which case there was a problem that is difficult to use for medical hot packs.
본 발명은 의료용 핫팩 등에 적용이 가능하도록 통기도의 편차가 적은 통기성 필름을 제공하고자 한다. 특히, 본 발명은 제조된 통기성 필름의 통기도 편차가 ±10 ~ 50g/㎡24hr 정도로 매우 작으므로 일정한 통기도를 달성할 수 있는 통기성 필름을 제공하고자 한다.The present invention is to provide a breathable film with less variation in air permeability to be applicable to medical hot packs and the like. In particular, the present invention is to provide a breathable film that can achieve a constant ventilation because the deviation of the prepared breathable film is very small as ± 10 ~ 50g / ㎡ 24hr.
또한 본 발명은 의료용으로 사용하기에 적절하도록 통기도가 일반 통기성 필름에 비해 매우 작으며, 그 편차가 적은 통기성 필름을 제공하고자 한다. 즉, 본 발명은 통기도가 300 ~ 400 g/㎡24hr인 통기성 필름을 제공하고자 한다.In another aspect, the present invention is to provide a breathable film having a very small air-permeability compared to the general breathable film, and less variation so as to be suitable for medical use. That is, the present invention is to provide a breathable film having a breathability of 300 ~ 400 g / ㎡ 24hr.
상기한 바와 같은 목적을 달성하기 위한 본 발명은 통기도 편차를 줄이기 위한 통기성필름용 컴파운드 조성물과 이를 이용한 통기성 필름의 제조방법에 관한 것이다.The present invention for achieving the object as described above relates to a compound composition for breathable film for reducing the air permeability variation and a method for producing a breathable film using the same.
본 발명자는 통상의 방법으로 통기성필름을 제조하는 경우, 필름의 폭에 대해 중간부분과 외측부분의 통기도 편차가 심하게 발생하는 것을 발견하였으며, 중간부분의 경우 통기도는 높으면서 불균일한 기공이 형성되며, 외측부분의 경우 통기도가 낮으면서 균일한 기공이 형성되는 것을 알게 되었다. The present inventors have found that when the breathable film is manufactured by a conventional method, the deviation between the middle and outer portions of the film is severely varied with respect to the width of the film. In the case of partial air permeability was found to form a uniform pore with low.
따라서 본 발명자는 이러한 통기성 필름의 폭을 반으로 자른 후, 이들 두 장의 필름을 중간부분과 외측부분이 교차되도록 적층함에 따라 기공이 보다 균일해지므로 통기도의 편차가 감소되는 필름을 제조할 수 있음을 발견하여 본 발명을 완성 하였다.Therefore, the present inventors can cut the width of the breathable film in half, and by laminating these two sheets so that the middle and outer portions intersect, the pores become more uniform, thereby producing a film having a reduced variation in air permeability. Discovered and completed the present invention.
또한 상기 적층 시 접착제를 일정한 패턴 및 크기를 갖는 갇혀진 형태(개방되지 않은)의 셀이 형성되도록 도포함으로써 셀 내부의 기공의 크기 및 개수가 조절되므로 통기도의 편차를 더욱 감소시킬 수 있음을 발견하였다.In addition, it has been found that by applying the adhesive to form a trapped (unopened) cell having a predetermined pattern and size during the lamination, the size and number of pores inside the cell are controlled to further reduce the variation in aeration. .
또한 상기 통기성 필름 제조 시 무기충전제의 크기를 일정하게 하고, 균일하게 분포하도록 함으로써 통기도의 편차를 더욱 감소시킬 수 있었다.In addition, by making the size of the inorganic filler constant and uniformly distributed during the manufacturing of the breathable film, it was possible to further reduce the deviation of the air permeability.
즉, 본 발명의 통기성 필름의 제조방법은That is, the manufacturing method of the breathable film of this invention
a) 통기성 필름용 컴파운드 조성물을 용융 혼련하는 단계;a) melt kneading the compound composition for breathable film;
b) 상기 혼련된 컴파운드 조성물을 압출하여 필름으로 제조하는 단계;b) extruding the kneaded compound composition to produce a film;
c) 상기 필름을 일축 또는 이축 연신하여 통기성 필름을 제조하는 단계;c) uniaxially or biaxially stretching the film to produce a breathable film;
d) 상기 통기성 필름의 폭에 대해 중간 부분을 절단하여 통기도가 높은 부분과 낮은 부분이 하나의 필름에 형성된 두 장의 통기성 필름을 제조하는 단계;d) cutting the middle portion with respect to the width of the breathable film to produce two breathable films having a portion having a high air permeability and a portion having a low portion in one film;
e) 상기 절단된 제 1통기성필름의 일면 또는 제 1통기성필름과 제 2통기성필름의 일면에 각각 접착제를 도포하는 단계; 및e) applying an adhesive to one surface of the cut first breathable film or one surface of the first breathable film and the second breathable film; And
f) 상기 제 1통기성필름과 제 2통기성필름을 통기도가 높은 부분과 낮은 부분이 겹쳐지도록 적층하여 합지하는 단계;f) laminating and laminating the first breathable film and the second breathable film so that a portion having a high air flow rate and a portion having a low breathability overlap;
를 포함한다.It includes.
이하는 본 발명의 각 단계에 대하여 보다 구체적으로 설명한다.Hereinafter, each step of the present invention will be described in more detail.
본 발명에서 상기 컴파운드 조성물은 폴리올레핀계수지 50 ~ 80 중량%, 평균 입경이 0.2 ~ 10㎛인 무기 충전제 10 ~ 50 중량% 및 첨가제 0.1 ~ 10 중량%를 포함하여 사용한다. 여기에 필요에 따라 안료를 1 ~ 10 중량%를 더 포함하는 것도 가능하다. In the present invention, the compound composition is used, including 50 to 80% by weight of polyolefin resin, 10 to 50% by weight of an inorganic filler having an average particle diameter of 0.2 to 10㎛ and 0.1 to 10% by weight of an additive. It is also possible to further contain 1 to 10 weight% of a pigment as needed here.
본 발명에서 통기성 합지필름의 통기도를 낮추고, 편차가 작은 필름으로 제조하기 위해서는 상기 무기 충전제의 크기가 균일해야 하며, 상기 컴파운드 조성물 내에 균일하게 분포해야 한다. 따라서 본 발명에서는 평균입경이 0.2 ~ 10㎛이고, 최대입경이 20㎛를 넘지 않도록 한다. In order to reduce the air permeability of the breathable laminated film in the present invention, and to produce a film having a small deviation, the size of the inorganic filler should be uniform and distributed uniformly in the compound composition. Therefore, in the present invention, the average particle diameter is 0.2 to 10 µm and the maximum particle diameter is not to exceed 20 µm.
그러나 상기 무기 충전제의 평균입경이 작으면 컴파운딩 시 고르게 혼련이 되지 않으므로 본 발명은 상기 a)단계에서 용융 혼련하는 단계를 1회 이상, 바람직하게는 2회 반복하여 균일한 컴파운드 조성물이 제조되도록 한다. However, if the average particle diameter of the inorganic filler is small, the compounding is not evenly kneaded during compounding, and the present invention allows the uniform compound composition to be prepared by repeating the melt kneading in step a) one or more times, preferably two times. .
상기 무기충전제는 탄산칼슘, 실리카, 황산바륨, 황산마그네슘, 황산칼슘, 탈크, 카올린, 수산화알루미늄, 수산화마그네슘, 산화아연, 알루미나, 산화티탄, 마이카, 제오라이트, 규조토, 탄산마그네슘, 크레이에서 선택되는 어느 하나 이상이 사용 가능하다. 그 함량은 전체 컴파운드 조성물 함량 중 10 ~ 50 중량%로 사용하는 것이 바람직하며, 10 중량% 미만으로 사용하는 경우 통기성 필름으로 제조가 어려우며, 50 중량%를 초과하는 경우 필름의 물성이 약해지므로 바람직하지 않다.The inorganic filler is any one selected from calcium carbonate, silica, barium sulfate, magnesium sulfate, calcium sulfate, talc, kaolin, aluminum hydroxide, magnesium hydroxide, zinc oxide, alumina, titanium oxide, mica, zeolite, diatomaceous earth, magnesium carbonate, cray One or more can be used. The content is preferably used in 10 to 50% by weight of the total compound composition content, it is difficult to manufacture a breathable film when used less than 10% by weight, it is not preferable because the physical properties of the film is weakened when it exceeds 50% by weight. not.
상기 폴리올레핀계수지는 저밀도 폴리에틸렌, 선형저밀도 폴리에틸렌, 고밀도 폴리에틸렌, 폴리프로필렌으로부터 선택된 1종 또는 2종 이상을 혼합하여 사용할 수 있다. 보다 바람직하게는 저밀도폴리에틸렌과 선형 저밀도폴리에틸렌을 혼합하여 사용하며, 그 혼합비율은 제한되지 않는다. 본 발명에서 상기 폴리올레핀계 수지는 필름에서 요구되는 평량 및 물성에 따라 수지들을 혼합하여 사용할 수 있으며, 구체적으로 전체 컴파운드 조성물 함량 중 50 ~ 80 중량% 범위로 사용한다. 50 중량% 미만으로 사용하는 경우 무기충전제를 비롯한 첨가제의 함량이 증가되어 필름의 강도가 저하될 수 있으며, 80 중량%를 초과하는 경우 통기성 필름 제조 시 통기도를 조절하기가 어렵다.The polyolefin resin may be used by mixing one or two or more selected from low density polyethylene, linear low density polyethylene, high density polyethylene, and polypropylene. More preferably, the low density polyethylene and the linear low density polyethylene are mixed and used, and the mixing ratio is not limited. In the present invention, the polyolefin-based resin may be used by mixing the resins according to the basis weight and physical properties required in the film, specifically, it is used in the range of 50 to 80% by weight of the total compound composition content. If the amount is less than 50% by weight, the content of the additive including the inorganic filler may be increased, and the strength of the film may be lowered. If the content is more than 80% by weight, it is difficult to control the air permeability during the manufacture of the breathable film.
본 발명에서 상기 안료는 통상적으로 필름 분야에서 사용되는 유, 무기 안료라면 제한되지 않고 사용할 수 있으며, 바람직하게는 백색안료인 산화티탄을 사용할 수 있다. 그 함량은 전체 컴파운드 조성물 함량 중 1 ~ 10 중량%로 사용하며, 상기 범위로 사용하는 것이 다른 성분들의 물성에 영향을 주지 않으면서도 색상을 발현할 수 있다.In the present invention, the pigment may be used without limitation as long as it is an oil or inorganic pigment that is commonly used in the film field, and preferably, titanium oxide, which is a white pigment, may be used. The content is used in 1 to 10% by weight of the total compound composition content, the use in the above range can express the color without affecting the properties of the other components.
본 발명에서 상기 첨가제는 통기성 필름의 제조에 사용되는 통상의 첨가제라면 제한되지 않고 사용될 수 있으며, 구체적으로 예를 들면, 상용화제, 활제, 산화방지제, 대전방지제, 가공조제, 자외선흡수제, 광안정제 등이 사용 가능하며, 이들을 단독 또는 둘 이상 혼합하여 사용할 수 있다. 이들 첨가제들의 함량은 전체 컴파운드 조성물 함량 중 0.1 ~ 10 중량%로 사용하는 것이 다른 성분들의 물성에 영향을 주지 않으면서도 고유의 물성을 발현할 수 있으므로 바람직하다.In the present invention, the additive may be used without limitation as long as it is a conventional additive used in the manufacture of a breathable film, and specifically, for example, a compatibilizer, a lubricant, an antioxidant, an antistatic agent, a processing aid, a UV absorber, a light stabilizer, and the like. These can be used and these can be used individually or in mixture of 2 or more. The content of these additives is preferably used in an amount of 0.1 to 10% by weight based on the total compound composition content because it can express inherent physical properties without affecting the properties of other components.
본 발명은 도 1에 도시된 바와 같이, 전술한 통기성 필름용 컴파운드 조성물을 용융 혼련한 후, T-다이를 통하여 필름으로 압출하며, 이 필름을 일축 또는 이축으로 연신함에 따라 조성물 내의 무기충전제와 수지 계면 간의 박리에 의해 통기성 필름으로 제조가 된다.The present invention, as shown in Figure 1, melt kneaded the compound composition for a breathable film described above, and then extruded into a film through a T-die, the inorganic filler and the resin in the composition by stretching the film uniaxially or biaxially It becomes manufacture into a breathable film by peeling between interfaces.
통상적으로 연신 비율을 1.5 ~ 3배로 연신을 시키며, 이렇게 연신된 후에는 통기성필름의 평량 및 연신비율에 따라 차이가 있으나 중심부분과 외측부분의 통기도 편차가 수백g/㎡24hr 정도로 매우 크게 제조된다.Typically, the stretching ratio is stretched by 1.5 to 3 times, and after stretching, there are differences depending on the basis weight and the stretching ratio of the breathable film, but the variation in the air permeability of the central portion and the outer portion is very large, about several hundred g / m 2 24hr.
따라서 본 발명은 연신 후 폭 방향의 중간 부분을 잘라 통기도가 높은 부분(10a, 20a)과 낮은 부분(10b, 20b)이 형성된 두 장의 필름으로 제조한다. Therefore, the present invention cuts the middle portion in the width direction after stretching to produce two sheets of films having high
이때 각각 제조된 두 장의 필름을 서로 다른 권취롤러에 권취하였다가 다음단계에서 서로 통기도사 다른 부분끼리 겹쳐지도록 하여 접착을 하는 것도 가능하며, 도 1에 도시된 바와 같이 권취단계 없이 연속적으로 적층되도록 하는 것도 가능하다.At this time, the two sheets of each film are wound on different winding rollers, and in the next step, it is also possible to bond the other parts of the aerobic yarns to overlap each other in the following step, and to be laminated continuously without a winding step as shown in FIG. 1. It is also possible.
본 발명은 상기 제 1통기성필름(10)의 일면에 접착제를 도포한 후, 제 2통기성필름(20)을 적층하며, 이때 도 2에 도시된 바와 같이, 제 1통기성필름(10)의 통기도가 높은 부분(10a)과 제 2통기성필름(20)의 통기도가 낮은부분(20b)이 서로 겹쳐지도록 적층을 하여 통기도의 편차를 줄인다. According to the present invention, after the adhesive is applied to one surface of the first
접착제는 일정한 크기 및 패턴을 갖는 셀이 형성되도록 도포를 함으로써 통기도를 더욱 균일하게 유지할 수 있었으며, 상기 접착제 도포는 롤코터 방식으로 도포하는 것이 바람직하나 이에 제한되지 않는다. 접착제 도포 과정에서 일정형상의 셀이 형성되는 패턴을 형성하여야 하므로, 롤러 자체에 패턴이 형성되어 있어야 한다. The adhesive could be more uniformly maintained by applying a cell to form a cell having a constant size and pattern, the adhesive application is preferably applied in a roll coater method, but is not limited thereto. Since the pattern to form a cell of a certain shape should be formed in the adhesive coating process, the pattern should be formed on the roller itself.
이에 따라 본 발명자는 그라비아 인쇄에 사용되는 동판을 롤러에 부착시켜 접착제를 도포하는 방법을 착안하였다. 즉, 동판이 부착된 롤러가 회전을 하면서 접착제 수용부를 지나면서 동판의 요홈에 상기 접착제가 들어가 담겨지며, 나머지 잔량은 닥터블레이드에 의해 제거된다. 이때 요홈에 들어있는 접착제는 다시 필름으로 전사가 되면서 접착층이 형성된다.Accordingly, the present inventors conceived a method of applying an adhesive by attaching a copper plate used for gravure printing to a roller. That is, the roller is attached to the grooves of the copper plate while passing through the adhesive receiving portion while the roller is attached, the remaining amount is removed by the doctor blade. At this time, the adhesive in the groove is transferred to the film again to form an adhesive layer.
본 발명에서 상기 접착제 도포는 어느 하나의 필름에 셀 모양이 형성된 동판이 부착된 롤러를 이용하여 접착제를 도포한 후 적층하여 라미네이트하는 것도 가능하나, 각각의 필름에 일정한 패턴이 형성된 동판이 부착된 롤러를 이용하여 접착제를 도포한 후 도포한 후 적층하여 셀 모양이 완성되도록 하는 것도 가능하다. In the present invention, the adhesive coating may be applied by laminating a laminate after applying the adhesive using a roller having a copper plate with a cell shape formed on any one film, and a roller having a copper plate having a predetermined pattern formed on each film. It is also possible to apply the adhesive using and then apply and then laminated to complete the cell shape.
즉, 도 3에 도시된 바와 같이, 어느 하나의 필름에 일정한 크기의 셀이 형성되도록 일정한 패턴의 요홈이 형성된 동판 롤러를 이용하여 접착제(30a)를 도포 한 후, 나머지 접착제가 도포되지 않은 필름의 통기도 부분이 상이하게 교차되도록 적층을 하여 합지하는 것도 가능하며, 도 4에 도시된 바와 같이, 두 필름 모두의 일면에 일정한 패턴의 요홈이 형성된 동판 롤러를 이용하여 접착제(30b)를 도포 하여 통기도 부분이 상이하게 교차되도록 적층을 하여 합지하며, 이때 두 필름이 합지되었을 때 일정한 크기 및 모양을 갖는 셀이 형성되도록 하는 것도 가능하다.That is, as shown in Figure 3, after applying the adhesive (30a) using a copper plate roller having a predetermined pattern of grooves to form a cell of a certain size on any one film, the remaining adhesive of the film is not applied It is also possible to laminate by laminating so that the air-permeable portions intersect differently. As shown in FIG. 4, the air-permeable portion is applied by applying an adhesive 30b using a copper plate roller having a groove having a predetermined pattern formed on one surface of both films. The laminates are laminated so as to cross differently, and it is also possible to form cells having a constant size and shape when the two films are laminated.
본 발명에서 상기 접착제는 제한되지 않으나 용제형 핫멜트 접착제를 사용하는 것이 바람직하며, 상기 용제형 핫멜트 접착제에 안료, 향료 또는 안료와 향료를 모두 혼합하여 사용하는 것도 가능하다.In the present invention, the adhesive is not limited, but it is preferable to use a solvent-type hot melt adhesive, and it is also possible to use a mixture of pigments, perfumes or pigments and perfumes in the solvent-type hot melt adhesive.
상기 용제형 핫멜트 접착제는 고분자 수지가 주성분인 핫멜트 접착제를 용매에 용해시킨 것으로, 상온에서 액상인 것이 바람직하며, 피착제에 도포 후 용제를 증발시켜 접착력 생성하는 것을 의미한다. 상기 고분자 수지로는 제한되지 않으나 예를 들면, 스티렌-부타디엔-스티렌 공중합체(SBS), 스티렌-이소프렌-스티렌 블록공중합체(SIS), 스티렌-에틸렌-부틸렌-스티렌 블록공중합체(SEBS), 스티렌-에틸렌-프로필렌-블록공중합체(SEPS), 스티렌-이소프렌-부틸렌 즐록공중합체(SIBS), 스티렌-부타디엔-부틸렌-스티렌 블록공중합체(SBBS) 등이 사용 가능하다. 이밖에 점착제(Tackifier)로서 수소화 석유수지, 로진 에스테르계수지, 테르펜계수지, 테르펜-페놀릭 수지, 폴리부텐 등이 첨가될 수 있다.The solvent-type hot melt adhesive is a polymer melt is a hot melt adhesive of the main component in a solvent, it is preferable that the liquid at room temperature, it means that the adhesive force is generated by evaporating the solvent after application to the adhesive. The polymer resin is not limited, but for example, styrene-butadiene-styrene copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS), Styrene-ethylene-propylene-block copolymer (SEPS), styrene-isoprene-butylene zlot copolymer (SIBS), styrene-butadiene-butylene-styrene block copolymer (SBBS) and the like can be used. In addition, as a tackifier, hydrogenated petroleum resin, rosin ester resin, terpene resin, terpene-phenolic resin, polybutene, or the like may be added.
이러한 용제형 핫멜트 접착제로는 예를 들면, 합성고무(스티렌-부타디엔-스티렌 공중합체(SBS)), 수소화 석유 수지(Hydrogenated petroleum resin), 파라핀오일(Paraffin oil)을 이소헵탄에 용해시킨 것으로, 고형분이 20 ~ 70 %인 것을 사용하는 것이 바람직하며, 이러한 용제형 핫멜트로는 National Adhesives사에서 생산되는 DT-7803, DT-7820, 36-6174, 36-6178, 36-6180, 36-6184 등이 있다.Such solvent-type hot melt adhesives include, for example, synthetic rubber (styrene-butadiene-styrene copolymer (SBS)), hydrogenated petroleum resin, and paraffin oil dissolved in isoheptane. It is preferable to use 20 to 70% of the solvent, and such solvent-type hot melts include DT-7803, DT-7820, 36-6174, 36-6178, 36-6180, 36-6184, etc. produced by National Adhesives. have.
본 발명에서 상기 접착제에 첨가되는 안료는 인체에 해가 없는 유기, 무기 안료를 사용하는 것이 바람직하며, 특히 용제형 핫멜트 접착제에 사용된 용제에 용해되는 것을 사용하는 것이 좋다. 바람직하게는 FDA승인을 받은 유기계 안료를 사용한다. 이러한 안료의 예로는, C.I. Pigment Red 122, C.I. Pigment Blue 15: 3, C.I. Pigment Green 7 등이 있으며, 이들에 제한되는 것은 아니다. 이때 상기 안료의 함량은 접착제 조성물 전체 중량 중 0.1 ~ 5 중량% 범위로 사용하는 것이 접착제의 물성을 저하시키지 않는 범위 내에서 미려한 색상을 발현할 수 있다.In the present invention, the pigment added to the adhesive is preferably an organic or inorganic pigment that is harmless to the human body, and in particular, it is preferable to use one dissolved in a solvent used in a solvent type hot melt adhesive. Preferably, FDA-approved organic pigments are used. Examples of such pigments include C.I. Pigment Red 122, C.I. Pigment Blue 15: 3, C.I. Pigment Green 7 and the like, but are not limited thereto. At this time, the content of the pigment may express a beautiful color within the range of using 0.1 to 5% by weight of the total weight of the adhesive composition does not lower the physical properties of the adhesive.
본 발명에서 상기 향료는 향을 발산할 수 있는 물질을 의미하는 것으로, 일반 향료, 기능성 향료 원액 또는 원액 함유 혼합용액 등이 사용 가능하며, 용제형 핫멜트 접착제에 사용된 용제에 용해되는 것을 사용하는 것이 좋다. 예를 들면 아로마 향료 등을 사용하거나 해충 퇴치 향료 등의 기능성 향료를 사용할 수 있으며, 이러한 향료의 예로는 한빛향료의 라벤다, 로즈마리, 한방향, 인삼향, 그린티 등이 있다. 이때 상기 향료의 함량은 접착제 조성물 전체 중량 중 0.1 ~ 5 중량% 범위로 사용하는 것이 접착제의 물성을 저하시키지 않는 범위 내에서 은은한 향을 발산할 수 있다. 상기 향료는 접착제와 혼합되어 필름에 도포되는 경우 젖음성 및 분산성으로 인해 필름의 모든 부위에 균일한 향을 얻을 수 있다. In the present invention, the fragrance means a substance capable of emitting fragrance, and general fragrances, functional fragrance stocks or mixed solution containing undiluted solutions can be used, and those used in a solvent used in a solvent-type hot melt adhesive are used. good. For example, aromatic fragrance may be used or functional fragrances such as pest control fragrances. Examples of such fragrances include lavender, rosemary, herbal, ginseng fragrance, and green tea. At this time, the content of the fragrance may emit a subtle fragrance within a range that does not decrease the physical properties of the adhesive is used in the range of 0.1 to 5% by weight of the total weight of the adhesive composition. When the fragrance is mixed with the adhesive and applied to the film, uniform fragrance may be obtained in all parts of the film due to wettability and dispersibility.
본 발명은 상기 접착제 도포 후, 접착제에 남아있는 유기용제를 휘발시키고, 접착제의 접착력을 강화시키기 위하여 10 ~ 50 ℃의 온도로 건조시키는 과정이 더 포함되는 것이 바람직하다.The present invention preferably further includes a step of volatilizing the organic solvent remaining in the adhesive after the adhesive is applied, and drying at a temperature of 10 to 50 ° C. in order to strengthen the adhesive strength of the adhesive.
본 발명에 따른 제조방법으로 제조하는 경우 두 개의 필름이 일정 크기의 셀이 형성된 접착제에 의해 라미네이트 되어 통기도가 일정하게 조절된 형태로 제조가 된다.In the manufacturing method according to the present invention, the two films are laminated by an adhesive in which cells of a predetermined size are formed, and thus the air permeability is uniformly controlled.
보다 구체적으로 본 발명에 따른 통기성필름은 접착제에 의해 형성된 셀에 의해 전체 필름의 통기도 편차가 ± 10 ~ 50 g/㎡24hr으로 제조할 수 있다. More specifically, the breathable film according to the present invention can be produced by the cell formed by the adhesive with a deviation of the air permeability of the entire film ± 10 ~ 50 g / ㎡ 24hr.
또한 본 발명에 따른 통기성 필름은 의료용 핫팩 등의 제조에 사용할 수 있으며, 이때 의료용 핫팩으로 사용하기 위해서는 통기도가 300 ~ 400g/㎡24hr 정도인 것이 바람직하다. 상기 통기도가 300 g/㎡24hr미만인 경우 통기도가 낮아 핫팩에 적용 시 열이 잘 발생하지 않아 미지근하여 온열효과가 미미하고, 400g/㎡24hr을 초과하는 경우는 공기의 통과량이 과도하여 산화칼슘과 급격하게 반응을 하므로 과도하게 발열이 되어 인체에 화상을 입힐 수 있다. 따라서 의료용 핫팩으로 적용하기 위한 본 발명의 통기성필름은 통기도가 300 ~ 400g/㎡24hr 정도이며, 제조되는 필름 전체의 통기도 편차가 ± 10 ~ 50 g/㎡24hr으로 제조되어야 한다.In addition, the breathable film according to the present invention can be used for the manufacture of medical hot packs, etc. At this time, it is preferable that the air permeability of about 300 ~ 400g / ㎡ 24hr to use as a medical hot pack. If the air permeability is less than 300 g / ㎡24hr, the air permeability is low, because the heat does not occur well when applied to the hot pack, because it is lukewarm, the thermal effect is insignificant. Because it reacts excessively, it generates excessive heat and can cause burns to the human body. Therefore, the breathable film of the present invention to be applied as a medical hot pack is about 300 ~ 400g / ㎡24hr breathability, the deviation of the entire film to be produced should be prepared to ± 10 ~ 50 g / ㎡24hr.
또한 본 발명은 필름의 적층 시 평량을 조절함으로써 통기도를 조절할 수 있으며, 보다 구체적으로 15 ~ 50 gsm인 필름을 제조한 후 이를 두 층으로 적층함으로써 30 ~ 110 gsm인 라미네이트 필름으로 제조한다.In addition, the present invention can control the air permeability by adjusting the basis weight during the lamination of the film, and more specifically to produce a laminate film of 30 to 110 gsm by preparing a film of 15 to 50 gsm and then laminated in two layers.
필름의 단면을 관찰해 보면 기공이 형상되는 모양이 불특정하게 여러겹의 층을 이루고 있는데 필름의 평량(두께)이 낮으면 낮을수록 기공의 층이 얇아지게 되며 이럴 경우, 통기도는 점점 높아진다. 이와 반대로 필름의 평량(두께)이 높으면 기공의 다 수의 층을 이루게 되며 기공은 아주 복잡한 미로와 같은 형상을 이루게되므로 통기도가 떨어지게 된다. Observing the cross section of the film, the shape of the pores forms an unspecific layer. The lower the basis weight (thickness) of the film, the thinner the layer of pores, and in this case, the air permeability increases. On the contrary, if the basis weight (thickness) of the film is high, it forms a plurality of layers of pores, and the pores form a very complicated maze-like shape, and thus the air permeability is reduced.
본 발명에 따른 제조방법은 필름 전체의 통기도 편차가 매우 작고, 저투습도를 갖는 통기성 필름을 제조할 수 있다.The manufacturing method according to the present invention can produce a breathable film having a very small variation in the air permeability of the film and having a low moisture permeability.
또한 본 발명에 따른 제조방법으로 제조된 통기성필름은 의료용 핫팩 등 인체에 직접 닿는 발열기구의 통기도를 일정하게 유지시켜 줌으로써 안전하게 사용할 수 있다.In addition, the breathable film produced by the manufacturing method according to the present invention can be safely used by maintaining a constant ventilation of the heating device directly in contact with the human body, such as medical hot packs.
이하는 본 발명의 구체적인 설명을 위하여 일예를 들어 설명하는 바, 본 발명이 하기 실시예에 한정되는 것은 아니다.Hereinafter, the present invention will be described by way of example for specific description of the present invention, but the present invention is not limited to the following examples.
이하 실시예에서 통기도는 ASTM E 96-80(g/㎡24hr) 방법으로 측정을 하였다. In the following examples, the air permeability was measured by ASTM E 96-80 (g / m 2 24hr) method.
[실시예 1]Example 1
저밀도폴리에틸렌(LDPE, 용융지수가 5.3g/10min(190℃/2.16kg)이고, 밀도가 0.919g/㎤(23℃), 한화석유화학, 제품명 : 960) 10중량%, 선형저밀도폴리에틸렌(LLDPE, 용융지수가 3.2g/10min(190℃/2.16kg)이고, 밀도가 0.923g/㎤(23℃), 한화석유화학, 제품명 : HS 1700) 40 중량%, 평균입경이 1㎛인 탄산칼슘 45 중량% 및 안료(산화티탄, Kerr-Mcgee Chemical, 제품명 : TRONOX titanium dioxide) 3 중량% 및 활제(A/O.1 , A/O)2 중량%를 배합기에서 혼합한 후 건조시켜 수분 함량이 1.0% 이하가 되도록 하였다. Low Density Polyethylene (LDPE, Melt Index 5.3g / 10min (190 ℃ / 2.16kg), Density 0.919g / cm3 (23 ℃), Hanwha Chemical, 960) 10% by weight, Linear Low Density Polyethylene (LLDPE, Calcium carbonate with 3.2g / 10min (190 ℃ / 2.16kg), density 0.923g / cm3 (23 ℃), Hanwha Chemical, product name: HS 1700) 40% by weight, average particle diameter of 1㎛ 45 %, and pigment (titanium, Kerr-M c gee Chemical, product name oxide: TRONOX titanium dioxide) 3% by weight, and a lubricant (a / O.1, a / O ) and dried to a moisture content after mixing 2% by weight in the mixer It was made to be 1.0% or less.
이렇게 건조된 혼합물을 트윈익스트루더(twin Extruder, 75mm, L/D 48)에서 230℃의 온도로 용융 혼련하였다. 이때 상기 용융 혼련 과정을 2회 반복하여 균일하게 혼화된 컴파운드 조성물을 제조한 후, 티-다이를 통하여 압출하여 평량이 40gsm인 필름으로 제조하였다.The dried mixture was melt kneaded at a temperature of 230 ° C. in a twin extruder (75 mm, L / D 48). At this time, the melt kneading process was repeated twice to prepare a compound compound that was mixed uniformly, and then extruded through a tee-die to prepare a film having a basis weight of 40 gsm.
이렇게 제조된 필름을 기계방향으로 2 배 연신하여 평량이 20gsm인 통기성 필름을 제조하였다.The film thus prepared was stretched twice in the machine direction to prepare a breathable film having a basis weight of 20 gsm.
이렇게 제조된 통기성필름의 정중앙부분과 외측 부분의 통기도를 측정한 결과, 정중앙부분은 600 g/㎡24hr이고, 최외측 부분은 200 g/㎡24hr이었다. As a result of measuring the air permeability of the center portion and the outer portion of the breathable film thus produced, the center portion was 600 g / ㎡ 24hr, the outermost portion was 200 g / ㎡ 24hr.
제조된 통기성 필름의 폭에 대해 중간을 절단하여 두 장의 통기성 필름으로 제조한 후, 도 3과 같이 제 1통기성필름의 일면에 격자무늬 패턴이 형성된 동판이 접착된 롤코터를 이용하여 접착제(용제형 핫멜트 접착제로 내쇼날스타치사의 DT7803를 이소헵탄에 6:4 중량비로 용해하여 사용)를 도포한 후, 제 2통기성필름을 상기 접착제가 도포된 면에 라미네이트하여 합지하였다. 이때 제 1통기성필름의 통기도가 낮은 부분과 제 2통기성필름의 통기도가 높은 부분이 서로 겹쳐서 적층되도록 하였다.After cutting the middle of the width of the prepared breathable film to produce two sheets of breathable film, as shown in Figure 3 using an adhesive (solvent type) using a roll coater is a copper plate formed with a grid pattern formed on one side of the first breathable film After using a hot melt adhesive, DT7803 from National Starch was dissolved in isoheptane in a 6: 4 weight ratio), and then a second breathable film was laminated and laminated on the surface to which the adhesive was applied. At this time, the portion of the low air permeability of the first breathable film and the portion of the high air permeability of the second breathable film were laminated so as to overlap each other.
이렇게 합지된 통기성필름의 물성을 측정한 결과, 평량이 42 gsm이었으며, 통기도가 350g/㎡24hr이고, 편차가 40 g/㎡24hr으로 매우 균일한 통기도를 갖는 필름이 제조된 것을 알 수 있었다.As a result of measuring the physical properties of the laminated breathable film, the basis weight was 42 gsm, it was found that the film having a very uniform air permeability of 350g / ㎡24hr, the deviation is 40 g / ㎡24hr.
[실시예 2][Example 2]
상기 실시예 1과 동일하게 연신과정을 거쳐 통기성 필름을 제조한 후 절단하여 통기도가 높은 부분과 낮은 부분이 혼합된 두 장의 통기성 필름으로 제조한 후, 도 4에 도시된 바와 같이, 제 1통기성필름의 일면에는 가로줄 형태의 패턴이 형성된 동판이 부착된 롤코터를 이용하여 접착제(용제형 핫멜트 접착제로 내쇼날스타치사의 DT7803를 이소헵탄에 6:4 중량비로 용해하여 사용)를 도포하고, 제 2통기성필름에는 세로줄 형태의 패턴이 형성된 동판이 접착된 롤코터를 이용하여 접착제(용제형 핫멜트 접착제로 내쇼날스타치사의 DT7803를 이소헵탄에 6:4 중량비로 용해하여 사용)를 도포하였다. After manufacturing the breathable film through the stretching process in the same manner as in Example 1, and cut into two pieces of breathable film mixed with a high and low air permeability, as shown in Figure 4, the first breathable film On one side, a roll coated coater with a horizontal stripe pattern was used to apply an adhesive (using a solvent-type hot melt adhesive in which DT7803 from National Starch was dissolved in isoheptane in a 6: 4 weight ratio), and second breathable. The film was coated with an adhesive (using a solvent-type hot melt adhesive in which DT7803 from National Starch was dissolved in isoheptane in a 6: 4 weight ratio) using a roll coater to which a copper plate having a vertical pattern was formed.
상기 제 1통기성필름과 제 2통기성필름의 접착제가 도포된 면이 마주보도록 라미네이트하여 합지한 결과 상기 실시예 1과 같이 격자 형의 셀이 형성된 것을 확인할 수 있었다.As a result of laminating and laminating the adhesive-coated surfaces of the first breathable film and the second breathable film to face each other, it was confirmed that a lattice cell was formed as in Example 1.
이렇게 합지된 통기성필름의 물성을 측정한 결과, 평량이 42gsm이었으며, 통기도가 350g/㎡24hr이고, 편차가 40 g/㎡24hr으로 매우 균일한 통기도를 갖는 필름이 제조된 것을 알 수 있었다.As a result of measuring the physical properties of the laminated breathable film, the basis weight was 42gsm, it was found that the film having a very uniform air permeability of 350g / ㎡24hr, the deviation is 40 g / ㎡24hr.
[실시예 3]Example 3
상기 실시예 1에서 접착제 도포 시, 접착제로서 내쇼날스타치사의 DT7803를 이소헵탄에 6:4 중량비로 용해한 용제형 핫멜트 접착제 100 중량부 당, 안료(C. I. Pigment Red 122)를 0.3 중량부로 혼합하여 점도가 20 cps/25℃인 접착제 조성물을 제조하여 사용하였다.When applying the adhesive in Example 1, 0.3 parts by weight of pigment (CI Pigment Red 122) was mixed per 100 parts by weight of a solvent-type hot melt adhesive in which DT7803 of National Starch Co., Ltd. was dissolved in isoheptane in an isoheptane as an adhesive. An adhesive composition of 20 cps / 25 ° C. was prepared and used.
합지된 통기성필름의 물성을 측정한 결과, 평량이 42gsm이었으며, 통기도가 350g/㎡24hr이고, 편차가 40 g/㎡24hr으로 매우 균일한 통기도를 갖는 필름이 제조된 것을 알 수 있었다. As a result of measuring the physical properties of the laminated breathable film, the basis weight was 42gsm, it was found that the film having a very uniform air permeability of 350g / ㎡24hr, the deviation is 40 g / ㎡24hr.
[실시예 4]Example 4
상기 실시예 3의 접착제에 한빛향료의 로즈마리 향료를 (평균입경이 10㎛인 다공성 실리카에 5(향료):1(실리카)의 비율로 함침시킨 물질을) 2.25중량부를 더 추가하여 점도가 20 cps/25℃인 접착제 조성물을 제조하여 사용한 것을 제외하고는 실시예 3과 동일한 방법으로 제조하였다.The viscosity of 20 cps was further added to the adhesive of Example 3 by adding 2.25 parts by weight of rosemary fragrance of Hanbita fragrance (material impregnated with porous silica having an average particle diameter of 10 μm at a ratio of 5 (fragrance): 1 (silica)). It was prepared in the same manner as in Example 3 except that the adhesive composition was prepared and used at / 25 ° C.
합지된 통기성필름의 물성을 측정한 결과, 평량이 42gsm이었으며, 통기도가 350g/㎡24hr이고, 편차가 40 g/㎡24hr으로 매우 균일한 통기도를 갖는 필름이 제조된 것을 알 수 있었다. 또한 상기 접착층이 색상뿐만 아니라 향기가 발산되는 것을 알 수 있었다. As a result of measuring the physical properties of the laminated breathable film, the basis weight was 42gsm, it was found that the film having a very uniform air permeability of 350g / ㎡24hr, the deviation is 40 g / ㎡24hr. In addition, the adhesive layer was found to emit not only color but also aroma.
도 1은 본 발명의 통기성 필름의 제조단계를 나타낸 공정도이다.1 is a process chart showing the manufacturing step of the breathable film of the present invention.
도 2는 본 발명에 따른 통기성 필름의 적층상태를 나타낸 것이다.Figure 2 shows the laminated state of the breathable film according to the present invention.
도 3은 본 발명에 따른 접착제 도포 시 일 양태를 나타낸 것이다.Figure 3 shows one embodiment when applying the adhesive according to the present invention.
도 4는 본 발명에 따른 접착제 도포 시 또 다른 양태를 나타낸 것이다.Figure 4 shows another embodiment when applying the adhesive according to the present invention.
- 도면의 주요 부분에 대한 설명 -Description of the main parts of the drawing-
10 : 제 1통기성필름 20 : 제 2통기성필름10: first breathable film 20: second breathable film
30a, 30b : 접착제30a, 30b: adhesive
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