WO2016032244A1 - 통기성 합지 보온재 - Google Patents
통기성 합지 보온재 Download PDFInfo
- Publication number
- WO2016032244A1 WO2016032244A1 PCT/KR2015/008959 KR2015008959W WO2016032244A1 WO 2016032244 A1 WO2016032244 A1 WO 2016032244A1 KR 2015008959 W KR2015008959 W KR 2015008959W WO 2016032244 A1 WO2016032244 A1 WO 2016032244A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- breathable
- insulation
- nonwoven fabric
- laminated
- Prior art date
Links
- 239000012774 insulation material Substances 0.000 title abstract description 10
- 239000010410 layer Substances 0.000 claims abstract description 121
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 61
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 44
- 229920000098 polyolefin Polymers 0.000 claims abstract description 44
- 239000002131 composite material Substances 0.000 claims abstract description 40
- 239000011247 coating layer Substances 0.000 claims abstract description 36
- 239000010954 inorganic particle Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims description 61
- 238000000034 method Methods 0.000 claims description 29
- 239000011810 insulating material Substances 0.000 claims description 28
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- 229920005672 polyolefin resin Polymers 0.000 claims description 12
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- 229910000906 Bronze Inorganic materials 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims description 2
- 239000010974 bronze Substances 0.000 claims description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000002984 plastic foam Substances 0.000 claims description 2
- 239000002759 woven fabric Substances 0.000 claims description 2
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 12
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- 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
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
- A01G9/1438—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
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- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
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Definitions
- the present invention relates to a breathable laminated insulation. More specifically, by laminating the insulation layer, aluminum coating layer, nonwoven fabric layer and polyolefin composite layer while maintaining breathability, strength is reinforced, and moisture or water droplets do not penetrate, thereby maintaining waterproofness, insulation and moisture permeability of the building. It is about insulation.
- vinyl houses are fabricated in the form of tunnels by bending steel pipes and covered with vinyl films such as vinyl chloride film and polyethylene film.They are mainly used for the cultivation of vegetables, flowers, and fruits.
- vinyl films such as vinyl chloride film and polyethylene film.They are mainly used for the cultivation of vegetables, flowers, and fruits.
- farm-provided vinyl houses designed in consideration of weather disasters such as heavy snow, strong winds and cold waves, so that sizes and materials suitable for each use of the vinyl house are recommended.
- heating is performed by operating a boiler or a hot air fan in a low temperature winter to increase the internal temperature.
- solid fuel coal, briquettes, etc.
- liquid fuel oil, etc.
- it is common to burn by heating buried resources such as gaseous fuels (gas, etc.) to generate heat, or to heat a heater or a hot air fan through electricity.
- the heating as described above since the heat generation is generated only locally, a separate air conditioning facility is required to supply warmth to the entire vinyl house, and it was difficult to raise and maintain the temperature evenly at once.
- Republic of Korea Patent No. 10-0877790 (2009.01.02) in the vinyl house for the vinyl house configured to include a planar heating element of a constant width along the length direction of the coated vinyl used in the production of the vinyl house
- the present invention discloses a technique of manufacturing a vinyl house using the vinyl for the vinyl house, and maintaining a temperature inside the vinyl house by applying power to the planar heating element.
- Republic of Korea Utility Model Publication No. 1990-0002728 (1990.03.31) as a thermal insulation method of a plastic house, laminate a thin heat insulating material made of styrofoam, urethane, etc. between the normal bubble film and on both surfaces, and both sides of the thermal insulation material
- a protective cover for a vinyl house such as bonding a synthetic resin cloth and coating the surface thereof with a synthetic resin film.
- the above method has a problem that requires a labor-intensive work to remove the protective cover in order to receive solar heat during the day and to cover again at night.
- Korean Patent Registration No. 10-0770694 (October 22, 2007) continually circulates hot air in a cross direction between the double vinyls installed in the frame of the vinyl house to maintain the warming effect inside the vinyl house. Provides vinyl house insulation vinyl that can be maximized.
- Korean Patent No. 10-0918608 (2009.09.16) attaches a reinforcing member composed of air pockets to a plurality of layers of vinyl sheets to prevent vinyl from being damaged by an impact such as hail. It is possible to increase the warming effect by using the air layer included in the air pocket, and further includes a reinforcing mesh and a heating device to disclose a technique for strengthening the vinyl structure of the plastic house.
- An object of the present invention is to solve the above problems, by heat-sealing a polyolefin composite layer prepared from a heat insulating material layer, an aluminum coating layer coated with a solution containing aluminum particles, a nonwoven fabric layer and a mixture of polyolefin resin and inorganic particles or When spray-bonding the adhesive, the adhesive provides not only excellent breathability but also a strength-reinforced breathable laminated insulation.
- Another object of the present invention is to provide a breathable laminated insulating material which is excellent in tensile strength and bonding strength and easy to be installed while preventing condensation.
- the present invention breathable breathable layer comprising a polyolefin composite layer prepared from a heat insulating material layer, an aluminum coating layer formed on one or both sides of the heat insulating material layer, a nonwoven fabric layer formed on the aluminum coating layer, a mixture of polyolefin resin and inorganic particles laminated on the nonwoven fabric layer. It is about laminated insulation.
- FIGS. 1 and 2 are more preferred examples of the present invention.
- Figure 1 is an aspect of the present invention, the aluminum coating layer 20 formed on one surface of the insulating material layer 10, the nonwoven fabric layer 30 formed on the aluminum coating layer 20, the nonwoven fabric layer 30 is laminated on the top
- the air-permeable laminated insulation including the polyolefin composite layer 40 is shown.
- the present invention is a heat insulating material layer 10, the aluminum coating layer 20 formed on one or both sides of the heat insulating material layer 10, the non-woven fabric layer 30 formed on the aluminum coating layer 20, the non-woven fabric layer 30 laminated on top It relates to a breathable laminated insulating material comprising a polyolefin composite layer 40 prepared from a mixture of polyolefin resin and inorganic particles.
- the thermal insulation layer 10 may be formed using a thermal insulation material in order to improve heat insulation and thermal insulation.
- the insulating material may be any one or two or more insulating materials selected from the group consisting of, for example, cotton, needle punching nonwoven fabric, plastic foam, melt bronze nonwoven fabric, polyolefin-based nonwoven fabric, polyolefin resin, textile fabrics and woven fabrics.
- the basis weight of the insulation layer 10 is 25 ⁇ 800 g / m2, preferably 100 ⁇ 300 g / m2, more preferably 100 ⁇ 200 g / m2 for the purpose of achieving the thermal insulation and insulation properties of the breathable laminated insulation It is preferable to be, but is not necessarily limited thereto.
- the aluminum coating layer 20 is formed by coating or depositing a solution containing aluminum particles in order to increase the warming effect due to the heat reflection and completely prevent the heat of the room to go out, or to heat-press the aluminum foil with an adhesive By bonding, the aluminum coating layer 20 may be formed.
- the aluminum coating layer 20 is formed by coating or depositing a solution containing aluminum particles on the insulating material layer 10, the insulating laminated material having excellent tensile strength, breaking strength and breathability while increasing the insulating effect It can manufacture.
- the aluminum coating layer 20 is formed by coating or depositing a solution containing aluminum particles as compared to using an aluminum foil, the aluminum coating layer 20 having excellent tensile strength, breaking strength, and breathability while increasing thermal insulation effect ) Can be formed.
- the aluminum coating layer 20 may use a solution obtained by dispersing aluminum powder having a particle size of 8 to 15 ⁇ m in an organic solvent, and using aluminum having a particle size of 8 to 15 ⁇ m to provide moisture permeability and heat. It is preferable for the reason that the reflectance can be simultaneously satisfied.
- the organic solvent is not limited as long as it can disperse the aluminum powder, specifically, in the group consisting of toluene, methylene chloride, chloroform, hexane, benzene, xylene, butyl acetate, methyl acetate, methyl isobutyl ketone, and the like. Any one or two or more mixed solvents selected may be used.
- the coating may be, for example, screen coating or gravure coating
- the basis weight of the aluminum coating layer 20 may be 1 to 80 g / m 2, preferably 1 to 40 g / m 2. It is desirable to completely block the exit and to coat in the above range for high thermal insulation effect.
- the nonwoven fabric layer 30 serves to strengthen the tensile strength, which is a mechanical property, and prevent tearing.
- the nonwoven fabric of the nonwoven fabric layer 30 of the present invention may be any one selected from a nonwoven fabric, a mesh film or a textile fabric made of a spun bond, a spunlace or a needle punch, or the like, but is not necessarily limited thereto.
- nonwoven fabric prepared by laminating a multilayer web on a continuously moving belt such that the basis weight of the nonwoven fabric layer is 10 to 60 g / m 2, and thermally bonding or needle punching, but is not limited thereto.
- the polyolefin composite layer 40 is prepared by adding an inorganic particle to the polyolefin resin to prepare an extruded sheet, then stretched, thereby improving waterproof and breathability.
- the polyolefin resin may be any one or a mixture of two or more selected from, for example, an ethylene- ⁇ -olefin copolymer resin, a low density polyethylene resin, and an ethylene-vinylacetate copolymer resin.
- a density of 0.895 to 0.940 g / cm 3 is used, and a melt index of 0.8 to 5.0 g / 10 min (190 ° C., 2.16 kg) is used.
- the density of the ethylene- ⁇ -olefin copolymer resin may be 0.9 to 0.95 g / cm 3 and a melt index of 2.5 to 7 g / 10 min (190 ° C., 2.16 kg).
- the ethylene-vinylacetate copolymer resin the vinyl acetate content is 5% or more, the density is 0.910 to 0.940 g / cm 3, and the melt index is 1 to 4 g / 10 min (190 ° C., 2.16 kg). It is preferable to use.
- the amount of low density polyethylene is large, the film formability increases, but the physical properties of tensile strength and elongation may be reduced.
- the amount of the ethylene-vinylacetate copolymer resin increases, it helps the dispersibility of the inorganic particles up to a certain amount, but it does not help increase the dispersibility at a higher content, and may cause a decrease in tensile strength and elongation.
- polypropylene low density polyethylene, high density polyethylene, linear low density polyethylene or medium density polyethylene
- the polyolefin resin is not limited as long as it has a molecular weight of the degree to form a film, but in the present invention, using a polyolefin resin in the melt index range of 1 ⁇ 7 g / 10min (190 °C, 2.16 kg) mechanical and breathable It is useful for maintaining moisture permeability.
- the inorganic particles may be used one or two or more selected from the group of calcium carbonate, silica, clay talc, talc, barium sulfate, alumina, zeolite, but is not necessarily limited.
- the average particle diameter of the inorganic particles can be selected and used according to the purpose of the invention, for the moisture permeability, breathability and mechanical strength, the average particle diameter of the inorganic particles is preferably 0.5 to 30 ⁇ m, preferably 0.7 to 5.0 ⁇ m .
- the content is adjusted as necessary, for example, 10 to 200 parts by weight of inorganic particles, preferably 10 to 150 parts by weight, more preferably, based on 100 parts by weight of the polyolefin resin in order to improve bending strength, elasticity and flexibility. It is better to use 30 to 100 parts by weight.
- the polyolefin composite layer 40 is not easily torn, it is preferable that the basis weight is 10 ⁇ 100 g / m2 in order to maintain breathability and moisture permeability.
- the nonwoven fabric layer 30 and the polyolefin composite layer 40 may be thermally bonded by a hot roller, or further comprising a breathable adhesive layer between the nonwoven fabric layer 30 and the polyolefin composite layer 40 to be bonded. Can be.
- the breathable adhesive layer may be formed by applying the adhesive on the nonwoven fabric layer 30 or the polyolefin composite layer 40, the basis weight is preferably 1 ⁇ 10 g / m2 for excellent adhesion and breathability.
- the breathable adhesive layer may be formed by a method of spray coating or gravure roll coating to uniformly coat the adhesive and maintain breathability. By spray coating or gravure roll coating to have a coating and an uncoated portion of the adhesive, it is possible to further improve the breathability.
- the adhesive is not limited, but for example, a hot melt adhesive or a one-component solvent adhesive may be used among the urethane adhesives.
- the hot melt adhesive is specifically, for example, any one or two or more polyolefin coefficient selected from polyethylene, polypropylene, polybutylene, ethylene-propylene copolymer, propylene-butylene copolymer, ethylene-propylene-butylene terpolymer 50 to 55% by weight of petroleum resin, terpene resin, rosin resin or any one selected from 35 to 45% by weight of two or more adhesion enhancers, aromatic oil, naphthenic oil, paraffin oil Or it may be used that is included in 5 to 10% by weight of two or more softening oils, but is not necessarily limited.
- the hot melt adhesive may be coated by spray coating using a spray after heating and melting to 200 °C or more, preferably 250 ⁇ 300 °C, the one-component solvent adhesive is coated with a spray coating method using a spray It may, but is not necessarily limited to this.
- spray coating using the spray small spot-type adhesives are formed on the surface of the nonwoven fabric layer 30 or the polyolefin composite layer 40 to improve adhesion while not impairing breathability.
- the heat insulating material layer 10, the aluminum coating layer 20 formed on one or both surfaces of the heat insulating material layer 10, the nonwoven fabric layer 30 formed on the aluminum coating layer 20, and the nonwoven fabric layer are formed as described above.
- a breathable laminated insulating material comprising a polyolefin composite layer 40 laminated on the top, the moisture or water droplets are not permeable without the process of imparting additional breathability, but has moisture permeability to pass moisture and air, tensile It is a feature to provide a breathable laminated insulation that is enhanced in strength and trapezoidal tear.
- the breathable laminated insulation according to the present invention can produce a breathable laminated insulation having excellent strength as well as excellent breathability.
- Figure 1 shows the structure of a breathable laminated insulation formed on one surface in the present invention.
- Figure 2 illustrates the structure of the breathable laminated insulation formed on both sides in the present invention.
- the strength and elongation at break of the sample were measured in the MD direction and CD direction, respectively.
- the amount of water passed in 24 hours per m 2 of the film prepared according to ASTM E-96-96 is expressed in g.
- the moisture absorption of calcium chloride generated by permeation of the moisture-permeable breathable film was measured by exposure for about 2 hours in a constant temperature and humidity chamber with a temperature of 38 ° C. and a relative humidity of 90%.
- the MD direction represents the travel direction and the CD direction represents the width direction perpendicular to the travel direction.
- the insulation layer was formed using a heat insulating material (breathable polyethylene _ UPC, B-UP30, polypropylene nonwoven fabric _ UPC, NAP06003) so as to have a basis weight of 170 g / m2, aluminum powder (IDI Chemical, Silver 2)
- a solution obtained by dispersing the thinner was gravure printed on one surface of the thermal insulation layer so as to have a basis weight of 1.5 g / m 2, and dried at 60 ° C. to form an aluminum coating layer on the thermal insulation layer.
- the nonwoven layer was formed by laminating a polypropylene filament fiber and laminating it with a multilayer web on a belt that was continuously moving so that the basis weight was 30 g / m 2.
- the prepared polyolefin composite layer was laminated on the prepared nonwoven fabric, and then heat-compressed at a pressure of 75 kg / cm 2 at a temperature of 170 ° C. to laminate the polyolefin composite layer on the nonwoven fabric.
- heat-compression breathable laminated insulation material at a temperature of 170 °C and a pressure of 78 kg / cm2 Prepared.
- the insulation layer was formed using a heat insulating material (breathable polyethylene _ UPC, B-UP30, polypropylene nonwoven fabric _ UPC, NAP06003) so as to have a basis weight of 170 g / m2, aluminum powder (IDI Chemical, Silver 2)
- a solution obtained by dispersing the thinner was gravure printed on one surface of the thermal insulation layer so as to have a basis weight of 1.5 g / m 2, and dried at 60 ° C. to form an aluminum coating layer on the thermal insulation layer.
- the nonwoven layer was formed by laminating a polypropylene filament fiber and laminating it with a multilayer web on a belt that was continuously moving so that the basis weight was 30 g / m 2.
- Polyurethane adhesive (Sungdo Chemical, D-9800) was coated on the prepared polyolefin composite layer to have a basis weight of 5 g / m 2 by the gravure roll coating method, and then the nonwoven fabric was laminated thereon and passed through a pressure roller. The polyolefin composite layer was pressed and laminated onto the nonwoven fabric.
- a breathable laminated insulation material was manufactured by heat compression.
- Example 2 Except for spraying a polyurethane adhesive (Sung Do Chemical, D-9800) on the polyolefin composite layer prepared in Example 2 to proceed in the same manner as in Example 2 to prepare a breathable laminated insulation.
- a polyurethane adhesive Sung Do Chemical, D-9800
- the insulation layer was formed using a heat insulating material (breathable polyethylene _ UPC, B-UP30, polypropylene nonwoven fabric _ UPC, NAP06003) so as to have a basis weight of 170 g / m2, aluminum powder (IDI Chemical, Silver 2)
- a solution obtained by dispersing a thinner fine chemical, PE thinner was gravure printed on both sides of the thermal insulation layer so as to have a basis weight of 3 g / m 2, and then dried at 60 ° C. to form an aluminum coating layer on the thermal insulation layer.
- the nonwoven layer was formed by laminating a polypropylene filament fiber and laminating it with a multilayer web on a belt that was continuously moving so that the basis weight was 30 g / m 2.
- Polyurethane adhesive (Sungdo Chemical, D-9800) was coated on the prepared polyolefin composite layer to have a basis weight of 5 g / m 2 by the gravure roll coating method, and the nonwoven fabric was laminated thereon, and then passed through a pressure roller. The polyolefin composite layer was pressed and laminated onto the nonwoven fabric.
- the heat insulating material layer was formed so that basis weight may be 170 g / m ⁇ 2> using a heat insulating agent (breathable polyethylene_UPC, B-UP30, polypropylene nonwoven fabric_UPC, NAP06003).
- a heat insulating agent breathable polyethylene_UPC, B-UP30, polypropylene nonwoven fabric_UPC, NAP06003
- the nonwoven layer was formed by laminating a polypropylene filament fiber and laminating it with a multilayer web on a belt that was continuously moving so that the basis weight was 30 g / m 2.
- the prepared polyolefin composite layer was laminated on the prepared nonwoven fabric layer, and thermally compressed at a pressure of 75 kg / cm 2 at a temperature of 170 ° C. to laminate the polyolefin composite layer on the nonwoven fabric.
- the heat insulating material layer was formed so that basis weight may be 170 g / m ⁇ 2> using the heat insulating material (breathable polyethylene_UPC, B-UP30, polypropylene nonwoven fabric_UPC, NAP06003).
- the nonwoven layer was formed by laminating a polypropylene filament fiber and laminating it with a multilayer web on a belt that was continuously moving so that the basis weight was 30 g / m 2.
- Polyurethane adhesive (Sungdo Chemical, D-9800) was coated on the prepared polyolefin composite layer so as to have a basis weight of 5 g / m 2 by the gravure roll coating method, and then the nonwoven fabric was laminated thereon and passed through a pressure roller. The polyolefin composite layer was pressed onto the nonwoven fabric and laminated.
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Abstract
본 발명은 통기성 합지 보온재에 관한 것이다. 보다 구체적으로는 보온재층(10), 보온재층(10)의 일면 또는 양면에 형성된 알루미늄 코팅층(20), 상기 알루미늄 코팅층(20) 상부에 형성된 부직포층(30), 상기 부직포층(30) 상부에 적층된 폴리올레핀과 무기입자의 혼합물로부터 제조되는 폴리올레핀 복합층(40)을 포함하는 통기성 합지 보온재에 관한 것이다.
Description
본 발명은 통기성 합지 보온재에 관한 것이다. 보다 구체적으로는 보온재층, 알루미늄 코팅층, 부직포층 및 폴리올레핀 복합층을 적층시켜 통기성이 유지되면서도 강도가 보강되고, 수분 또는 물방울은 투과하지 않게 함으로써, 건축물의 방수성, 보온성 및 투습성을 유지하도록 하는 통기성 합지 보온재에 관한 것이다.
일반적으로 비닐하우스는 철제 파이프 등을 밴딩하여 터널 형태의 프레임을 짜고 그 위에 염화비닐 필름, 폴리에틸렌 필름 등의 비닐 필름으로 덮은 것으로, 주로 채소류, 화훼류, 과실류의 재배에 쓰임은 물로, 축산업계에서도 두로 쓰이고 있으며, 특히, 폭설과 강풍 및 한파 등의 기상재해를 고려하여 설계한 농가보급형 비닐하우스의 경우 종류 및 표준규격이 있어, 비닐하우스 사용 용도별로 적합한 크기와 재료를 권장하고 있다.
또한, 비닐하우스는 대개 보온을 주목적으로 하므로, 기온이 낮은 겨울철에는 보일러나 온풍기를 가동하여 내부 온도를 높이는 방법으로 난방을 하는데, 이를 위해서 고체 연료(석탄, 연탄 등), 액체 연료(기름 등), 기체 연료(가스 등)와 같은 매설 자원을 태워 열을 발생하여 난방을 하거나, 전기를 통해 히터나 온풍기를 가동하여 난방을 하는 것이 일반적이다.
그러나 상기 경우에는 모두 유지비가 많이 들고, 결국 재배작물에 대한 원가가 높아짐에 따라, 생산품에 대한 가격경쟁력이 낮아지는 문제점이 있을 뿐 아니라, 고체 연료나 액체 연료의 경우에는 연소하면서 발생하는 인체에 해로운 가스를 외부로 배출시키는 추가 시설이 더 필요하고, 전기의 경우에는 관리는 용이하지만, 전기료가 많이 들게 되므로 효율성이 떨어지는 문제점이 있었다.
특히, 상기와 같은 난방은, 그 발열이 국소적으로만 발생하게 되므로, 비닐하우스 전체에 온기를 공급하기 위해서는 별도의 공조 시설이 필요하고, 일시에 골고루 온도를 높이고 유지하기는 어려웠다.
또한, 난방이 필요하지 않은 계절에는 단순히 부직포를 덮는 방식으로 단열을 달성함으로써 냉해를 방지하기도 한다. 그러나 상기 부직포의 경우에는 비닐하우스에 계속 씌워 놓는 것이 아니라, 밤에는 덮었다가 낮에는 일조량을 고려하여 다시 벗기는 과정을 반복해야 하므로, 그 과정이 번거로워 관리에 어려움이 있으며, 비닐하우스 외측에 위치하기 때문에, 시간이 지나면서 외부 환경(비, 눈, 마찰, 외력 등)에 의해 손실되게 되므로 교체에 따른 부담이 있고, 교체 후 발생한 폐기물 처리에도 어려움이 있다.
개선된 비닐하우스 보온 방법으로서, 대한민국 등록특허 제10-0877790호(2009.01.02)에서는 비닐하우스 제작에 사용되는 피복 비닐의 길이 방향을 따라, 일정한 폭의 면상발열체가 포함되도록 구성한 비닐하우스용 비닐을 구성하여, 상기 비닐하우스용 비닐로 비닐하우스를 제작하고, 상기 면상발열체에 전원을 인가하여 비닐하우스 내부의 온도를 유지하는 기술을 개시하고 있다.
또한, 대한민국 실용신안공보 실1990-0002728호(1990.03.31)에서는 비닐하우스의 보온 방법으로서, 통상의 기포 필름의 사이와 양측 표면에 스티로폼이나 우레탄 등으로 된 박판상의 보온재를 층합하고, 보온재의 양면에는 합성수지포를 접합하고, 그 표면을 합성수지 필름으로 코팅하는 와 같은 비닐하우스용 보호 덮개가 공지되었다. 그러나 상기와 같은 방법은 낮에는 태양열을 받기 위해 보호 덮개를 치우고 밤에는 다시 덮는 노동력이 많이 드는 작업이 필요한 문제점이 있었다.
이런 문제점을 개선한 기술로서, 대한민국 등록특허 제10-0770694호(2007.10.22)에서는 비닐하우스 틀에 설치하는 이중비닐 사이로 상호 교차하는 방향으로 뜨거운 공기를 계속적으로 순환시킴으로서 비닐하우스 내부의 보온 효과를 극대화 시킬 수 있는 비닐하우스 보온비닐을 제공한다.
영세 농가에서 많이 사용하는 일반적으로 비닐 한 겹으로만 단열을 하고 있는 비닐하우스의 경우에는, 실내의 열을 쉽게 외부에 뺏기게 되어 상당한 열손실이 발생한다. 열손실을 막기 위해서는 단열재를 씌워야 하지만, 추가되는 단열재 비용과 실내온도를 높이기 위해 사용되는 많은 양의 연료 및 전력으로 인한 비용 때문에, 영세한 농가에서는 복잡한 시공과 시설투자비가 큰 부담으로 작용하는 등 문제점이 발생하게 된다. 또한, 비닐하우스용 비닐지를 여러 겹으로 겹쳐서 사용하기도 하지만, 이는 견고한 비닐하우스 구조를 실현하기 힘들고 보온의 효과도 크지 않다. 그러나 비닐하우스의 구조를 이중으로 설치하면 보온성과 내구성을 높일 수는 있지만, 단열과 보온을 위해 뼈대를 이중으로 설치하고, 비닐도 이중으로 설치해야 하는 문제점이 있다.
이러한 문제를 개선한 것으로서, 대한민국 등록특허 제10-0918608호(2009.09.16)에서는 여러 겹의 비닐시트에 에어포켓이 구성된 보강부재를 부착하여 우박 등의 충격으로 비닐이 파손되는 것을 미연에 방지할 수 있고, 에어포켓에 포함된 공기층을 이용하여 보온 효과를 높이고, 보강 메쉬와 발열장치를 더 포함하여 비닐하우스의 비닐 구조를 견고하게 할 수 있는 기술을 개시한다.
이와 같이, 농업 분야에서 널리 사용되고 있는 비닐하우스에 있어서, 보온성을 높이고 내구성을 개선하기 위한 많은 방법들과 재료들이 개시되었지만, 상기 예로든 종래의 방법들은 모두 비닐하우스 내부의 온도를 유지하려면 계속해서 별도의 전원이나 에너지의 가동을 필요로 하고 구성도 복잡하여, 설치 및 관리가 복잡하고 비용이 많이 든다는 문제는 여전히 남아 있다.
본 발명의 목적은 상기 문제점을 해결하기 위한 것으로, 보온재층, 알루미늄 입자를 포함하는 용액을 코팅한 알루미늄 코팅층, 부직포층 및 폴리올레핀 수지와 무기입자의 혼합물로부터 제조되는 폴리올레핀 복합층을 열접착 시키거나 또는 접착제를 스프레이 도포하여 접착시키는 경우 우수한 통기성 뿐 만 아니라 강도가 보강된 통기성 합지 보온재를 제공하는 것이다.
본 발명의 다른 목적은, 결로현상을 방지하는 한편, 인장강도 및 결합력이 우수하고, 시공이 용이한 통기성 합지 보온재를 제공하는 것이다.
본 발명은 보온재층, 보온재층의 일면 또는 양면에 형성된 알루미늄 코팅층, 상기 알루미늄 코팅층 상부에 형성된 부직포층, 상기 부직포층 상부에 적층된 폴리올레핀 수지와 무기입자의 혼합물로부터 제조되는 폴리올레핀 복합층을 포함하는 통기성 합지 보온재에 관한 것이다.
또한, 본 발명의 더욱 바람직한 예로 도 1 및 도 2를 참고한다.
먼저, 도 1은 본 발명의 일 양태로 보온재층(10)의 일면에 형성된 알루미늄 코팅층(20), 상기 알루미늄 코팅층(20) 상부에 형성된 부직포층(30), 상기 부직포층(30) 상부에 적층된 폴리올레핀 복합층(40)을 포함하는 통기성 합지 보온재를 도시한 것이다.
도 2는 본 발명의 또 다른 양태로 보온재층(10)의 양면에 형성된 알루미늄 코팅층(20), 상기 알루미늄 코팅층(20) 상부에 형성된 부직포층(30), 상기 부직포층(30) 상부에 적층된 폴리올레핀 복합층(40)을 포함하는 통기성 합지 보온재를 도시한 것이다.
이하는 본 발명의 통기성 합지 보온재에 대해 보다 구체적으로 설명한다.
본 발명은 보온재층(10), 보온재층(10)의 일면 또는 양면에 형성된 알루미늄 코팅층(20), 상기 알루미늄 코팅층(20) 상부에 형성된 부직포층(30), 상기 부직포층(30) 상부에 적층된 폴리올레핀 수지와 무기입자의 혼합물로부터 제조되는 폴리올레핀 복합층(40)을 포함하는 통기성 합지 보온재에 관한 것이다.
상기 보온재층(10)은 단열성 및 보온성을 향상시키기 위하여 보온재를 사용하여 형성시킬 수 있다. 상기 보온재는 구체적으로 예를 들면, 솜, 니들펀칭 부직포, 플라스틱폼, 멜트브론 부직포, 폴리올레핀계 부직포, 폴리올레핀수지, 섬유직물 및 직조물 등으로 이루어진 군에서 선택되는 어느 하나 또는 둘 이상의 보온재를 사용할 수 있다. 상기 보온재층(10)의 평량은 통기성 합지 보온재의 단열성 및 보온성의 목적달성을 위하여 평량이 25 ~ 800 g/㎡, 바람직하게는 100 ~ 300 g/㎡, 더욱 바람직하게는 100 ~ 200 g/㎡로 되도록 하는 것이 바람직하지만, 반드시 이에 제한되는 것은 아니다.
상기 알루미늄 코팅층(20)은 열 반사로인한 보온효과를 증가시키고, 실내의 열이 외부로 나가는 것을 완전히 차단하기 위하여 알루미늄 입자를 포함하는 용액을 코팅 또는 증착하여 형성하거나, 알루미늄박을 열 가압하거나 접착제로 접착하여 알루미늄 코팅층(20)을 형성할 수 있다. 특히, 상기 보온재층(10)상부에 알루미늄 입자를 포함하는 용액을 코팅 또는 증착하여 알루미늄 코팅층(20)을 형성하는 경우, 보온효과를 증가시키는 동시에 인장강도, 파단강도 및 통기성이 우수한 통기성 합지 보온재를 제조할 수 있다. 또한, 알루미늄박을 사용하는 것 대비 알루미늄 입자를 포함하는 용액을 코팅 또는 증착하여 알루미늄 코팅층(20)을 형성하는 경우, 보온효과를 증가시키는 동시에 인장강도, 파단강도 및 통기성이 더욱 우수한 알루미늄 코팅층(20)을 형성할 수 있다.
상기 알루미늄 코팅층(20)은 보다 구체적으로는, 입자 크기가 8 ~ 15 ㎛인 알루미늄 분말을 유기용매에 분산시킨 용액을 사용할 수 있으며, 입자 크기가 8 ~ 15 ㎛인 알루미늄을 사용하는 것이 투습도와 열 반사율을 동시에 충족시킬 수 있는 이유로 바람직하다.
상기 유기용매는 알루미늄 분말을 분산시킬 수 있는 것이면 제한되지 않으며, 구체적으로 예를 들면, 톨루엔, 염화메틸렌, 클로로포름, 헥산, 벤젠, 크실렌, 부틸아세테이트, 메틸아세테이트 및 메틸 이소부틸 케톤 등으로 이루어진 군에서 선택되는 어느 하나 또는 둘 이상의 혼합용매를 사용할 수 있다.
상기 코팅은 구체적으로 예를 들면, 스크린 코팅 또는 그라비어 코팅을 할 수 있으며, 상기 알루미늄 코팅층(20)의 평량이 1 ~ 80 g/㎡, 바람직하게는 1 ~ 40 g/㎡인 것이 열이 외부로 나가는 것을 완전히 차단하고, 높은 단열효과를 위하여 상기 범위로 코팅하는 것이 바람직하다.
상기 부직포층(30)은 기계적인 물성인 인장강도를 강화시키고, 찢어짐 등이 발생되지 않게 하도록 하는 역할을 한다. 또한, 본 발명의 부직포층(30)의 부직포는 스펀본드, 스펀레이스 또는 니들펀치 등으로 제조하는 부직포나 메쉬필름 또는 섬유직물에서 선택되는 어느 것이라도 사용할 수 있지만, 반드시 이에 제한되지는 않는다. 바람직하게는, 통기성이 우수한 효과를 도달하고, 원하는 강도를 얻으며, 찢어짐을 방지하기 위하여, 폴리에스테르계 또는 폴리올레핀계 필라멘트 섬유를 방사하여 사용하는 것이 좋다. 부직포층의 평량이 10 ~ 60 g/㎡로 되도록 연속 이동하는 벨트 상에 다층 웹으로 적층하여 열접착 시키거나 또는 니들펀칭하여 제조되는 부직포를 사용할 수 있지만 반드시 이에 제한되지는 않는다.
상기 폴리올레핀 복합층(40)은 폴리올레핀수지에 무기입자를 첨가하여 압출시트를 제조한 후, 연신하여 제조함으로써, 방수 및 통기성을 향상시킬 수 있다. 상기 폴리올레핀수지는 구체적으로 예를 들면, 에틸렌-α-올레핀 공중합수지, 저밀도폴리에틸렌 수지 및 에틸렌-비닐아세테이트 공중합수지에서 선택되는 어느 하나 또는 둘 이상의 혼합물을 사용할 수 있다. 에틸렌-α-올레핀 공중합수지를 사용하는 경우, 필름의 유연성을 위하여 밀도가 0.895 ~ 0.940 g/㎤의 범위인 것을 사용하고, 용융지수는 0.8 ~ 5.0 g/10min(190℃, 2.16 ㎏)인 것을 사용할 수 있으며, 또한, 에틸렌-α-올레핀 공중합수지의 α-올레핀으로서는 부텐, 헥센, 옥텐의 군에서 선택되는 어느 하나를 사용할 수 있다. 상기 저밀도폴리에틸렌 수지를 사용하는 경우, 밀도는 0.9 ~ 0.95 g/㎤, 용융지수가 2.5 ~ 7 g/10min(190℃, 2.16 ㎏)인 것을 사용할 수 있다. 또한, 에틸렌-비닐아세테이트 공중합수지를 사용하는 경우, 비닐아세테이트 함량이 5%이상이며, 밀도가 0.910 ~ 0.940 g/㎤이고, 용융지수가 1 ~ 4 g/10min(190℃, 2.16 ㎏)인 것을 사용하는 것이 바람직하다.
상기 폴리올레핀수지의 둘 이상의 혼합물을 사용하는 경우, 저밀도폴리에틸렌의 양이 많으면 필름 가공성은 증가하나, 인장강도 및 신율의 물성은 저하될 수 있다. 또한, 에틸렌-비닐아세테이트 공중합수지의 양이 많아지게 되면 일정량까지는 무기입자의 분산성에 도움을 주지만, 그 이상의 함량에서는 분산성 증가에 도움을 주지 못하고, 인장강도 및 신율의 물성 저하를 초래할 수 있다.
바람직하게는 폴리프로필렌, 저밀도 폴리에틸렌, 고밀도 폴리에틸렌, 선형 저밀도 폴리에틸렌 또는 중밀도 폴리에틸렌에서 선택되는 것을 사용할 수 있다. 상기 폴리올레핀수지는 필름을 형성하는 정도의 분자량을 가지는 것이라면 제한을 두지 않지만 본 발명에서는 용융지수가 1 ~ 7 g/10min(190℃, 2.16 ㎏) 범위의 폴리올레핀수지를 사용하는 것이 기계적 물성과 통기성 및 투습성을 유지하는 용도로 유용하다.
상기 무기입자는 탄산칼슘, 실리카, 클레이 활석, 탈크, 황산바륨, 알루미나, 제올라이트의 군에서 선택되는 하나 또는 둘 이상을 사용할 수 있지만, 반드시 제한되지는 않는다. 상기 무기입자의 평균입경은 발명의 목적에 따라 선택하여 사용할 수 있으며, 투습도, 통기성 및 기계적 강도를 위하여 무기입자의 평균입경은 0.5 ~ 30 ㎛, 바람직하게는 0.7 ~ 5.0 ㎛인 것을 사용하는 것이 좋다.
그 함량은 필요에 의해 조절한 것으로 예를 들면, 휨강도, 탄성 및 유연성의 향상을 위하여 상기 폴리올레핀수지 100 중량부에 대하여, 무기입자 10 ~ 200 중량부, 바람직하게는 10 ~ 150 중량부, 더욱 바람직하게는 30 ~ 100 중량부를 사용하는 것이 좋다. 상기 폴리올레핀 복합층(40)은 쉽게 찢어지지 않고, 통기성 및 투습성을 유지하기 위하여 평량이 10 ~ 100 g/㎡ 인 것이 바람직하다.
또한, 본 발명에서 상기 부직포층(30)과 폴리올레핀 복합층(40)은 핫 롤러에 의해 열접착 시키거나 또는 부직포층(30)과 폴리올레핀 복합층(40) 사이에 통기성 접착층을 더 포함하여 접착시킬 수 있다.
상기 통기성 접착층은 접착제를 부직포층(30) 상부 또는 폴리올레핀 복합층(40) 상부에 도포하여 형성할 수 있으며, 우수한 접착력 및 통기성을 위하여 평량이 1 ~ 10 g/㎡ 인 것이 바람직하다. 상기 통기성 접착층은 접착제를 균일하게 코팅하고, 통기성을 유지하기 위하여 분무코팅 또는 그라비아 롤 코팅의 방법으로 형성할 수 있다. 상기 분무코팅 또는 그라비아 롤 코팅을 하여 접착제의 코팅부와 비코팅부를 가지도록 함으로써, 통기성을 더욱더 향상시킬 수 있다.
상기 접착제는 제한되지는 않으나 예를 들면, 우레탄 접착제 중에서 핫멜트 접착제 또는 1액형 용제형 접착제를 사용할 수 있다. 상기 핫멜트 접착제는 구체적으로 예를 들면, 폴리에틸렌, 폴리프로필렌, 폴리부틸렌, 에틸렌-프로필렌 공중합체, 프로필렌-부틸렌 공중합체, 에틸렌-프로필렌-부틸렌 삼중합체에서 선택되는 어느 하나 또는 둘 이상의 폴리올레핀계수지가 50 ~ 55 중량% 석유계수지, 테르펜계수지, 로진계수지에서 선택되는 어느 하나 또는 둘 이상의 접착증강제가 35 ~ 45 중량%, 방향족계 오일, 나프텐계 오일, 파라핀계 오일에서 선택되는 어느 하나 또는 둘 이상의 연화 오일이 5 ~ 10 중량%로 포함되는 것을 사용할 수 있지만, 반드시 제한되지는 않는다.
상기 핫멜트 접착제는 200℃이상, 바람직하게는 250 ~ 300℃로 가열하여 용융한 후 스프레이를 이용하여 분무코팅 방법으로 코팅할 수 있으며, 상기 1액형 용제형 접착제는 스프레이를 이용하여 분무코팅 방법으로 코팅할 수 있지만, 반드시 이에 제한되지는 않는다. 상기 스프레이를 이용하여 분무코팅을 하는 경우 작은 스팟 형태의 접착제들이 부직포층(30) 또는 폴리올레핀 복합층(40)의 표면에 형성되어 통기성을 방해하지 않음과 동시에 접착력을 향상시킬 수 있게 된다.
본 발명에 따른 접착제를 분무코팅 방법을 이용하여 부직포층(30) 상부 또는 폴리올레핀 복합층(40) 상부에 스팟 형태로 분산시킴으로써 산소 투과도를 최대한 유지할 수 있으며, 종래 격자형 접착 방식 등에 비하여 접착력을 향상 시킬 수 있다.
본 발명은 상기와 같은 방법에 의해 보온재층(10), 보온재층(10)의 일면 또는 양면에 형성된 알루미늄 코팅층(20), 상기 알루미늄 코팅층(20) 상부에 형성된 부직포층(30), 상기 부직포층(30) 상부에 적층된 폴리올레핀 복합층(40)을 포함하는 통기성 합지 보온재를 제조함으로써, 별도의 통기성을 부여하는 과정이 없이도 수분 또는 물방울은 투과되지 않으나 습기 및 공기를 통과시키는 통기성을 갖고, 인장강도 및 사다리꼴 인열이 강화되는 통기성 합지 보온재를 제공하는 것에 특징이 있다.
본 발명에 따른 통기성 합지 보온재는 우수한 통기성 뿐 만 아니라 강도가 우수한 통기성 합지 보온재를 제조할 수 있다.
또한, 결로현상을 방지하는 한편 습기는 통과시키면서 건축물의 방수성 및 보온성을 유지할 수 있는 통기성 합지 보온재를 제조할 수 있다.
도 1은 본 발명에서 일면에 형성된 통기성 합지 보온재의 구조를 도시한 것이다.
도 2는 본 발명에서 양면에 형성된 통기성 합지 보온재의 구조를 도시한 것이다.
*부호의 설명*
10 : 보온재
20 : 알루미늄 코팅층
30 : 부직포
40 : 폴리올레핀 복합층
이하는 본 발명을 보다 구체적으로 설명하기 위하여, 일예를 들어 설명하는바, 본 발명이 하기 실시예에 한정되는 것은 아니다.
이하 물성은 하기의 방법으로 측정하였다.
1) 인장물성
ASTM D5034에 준하여 시료의 파단 시 강도 및 신도를 MD방향 CD방향에 대해 각각 측정하였다.
2) 사다리꼴 인열
ASTM D5733-95에 준하여 시료의 인열을 MD방향 CD방향에 대해 각각 측정하였다.
3) 부직포층과 폴리올레핀 복합층의 PEEL 측정
ASTM D 751에 준하여 시편크기를 가로 × 세로 = 25 × 150 ㎝로 하여 시료의 MD 방향을 인장시험기(INSTRON)를 이용 하여 측정하였다.
4) 투습도
ASTM E-96-96에 준하여 제조된 필름을 1 ㎡당 24시간 동안 통과한 수분의 양을 g으로 나타내었다.
온도가 38℃, 상대습도 90 %의 항온 항습기내에서 약 2시간동안 노출시켜 통기성 필름을 수분이 투과함으로써 발생하는 염화칼슘의 흡습정도를 측정하였다.
5) 내수압
AATCC 127-1998 준하여 일정한 내수 압력 하에서 시료가 액체 상태의 물에 의한 침투를 견디는 저항성을 측정하였다.
본 발명의 물성 측정 중 MD방향은 주행방향을, CD방향은 주행방향에 수직인 폭 방향을 나타낸다.
[실시예 1]
보온재(통기성 폴리에틸렌_(주)UPC, B-UP30, 폴리프로필렌 부직포_(주)UPC, NAP06003)를 이용하여 평량이 170 g/㎡가 되도록 보온재층을 형성한 후, 알루미늄분말(IDI Chemical, 실버 2)을 신너(미성화학, P.E 신너)에 분산시킨 용액을 상기 보온재층 일면에 평량이 1.5 g/㎡가 되도록 그라비아 인쇄한 후, 60℃에서 건조 하여 보온재층 상부에 알루미늄 코팅층을 형성하였다.
다른 공정으로, 저밀도 폴리에틸렌(한화케미칼, HANWHA LDPE 955, 밀도:0.913)100 중량부에 대해 탄산칼슘(야바시코리아, YK1C) 55 중량부 혼화한 후 용융하였다. 필름 압출기에서 T-다이 압출한 후, 연신온도 70℃에서 2.5배로 1축연신하여 평량 30 g/㎡인 폴리올레핀 복합층을 형성하였다.
또 다른 공정으로, 부직포층은 폴리프로필렌 필라멘트 섬유를 방사하여 평량이 30 g/㎡로 되도록 연속 이동하는 벨트 상에 다층 웹으로 적층하여 열접착 시켜 형성하였다. 상기 제조된 부직포 상에 상기 제조된 폴리올레핀 복합층을 적층시킨 후 170℃의 온도에서 75 ㎏/㎠의 압력으로 가열 압착하여 폴리올레핀 복합층을 부직포 상에 압착시켜 합지 시켰다.
상기 합지된 폴리올레핀 복합층과 부직포층의 부직포층면과 상기 보온재층의 상부에 알루미늄 코팅층이 형성된 알루미늄 코팅층면이 대면되도록 한 후, 170℃의 온도 및 78 ㎏/㎠의 압력으로 가열압착 통기성 합지 보온재를 제조하였다.
[실시예 2]
보온재(통기성 폴리에틸렌_(주)UPC, B-UP30, 폴리프로필렌 부직포_(주)UPC, NAP06003)를 이용하여 평량이 170 g/㎡가 되도록 보온재층을 형성한 후, 알루미늄분말(IDI Chemical, 실버 2)을 신너(미성화학, P.E 신너)에 분산시킨 용액을 상기 보온재층 일면에 평량이 1.5 g/㎡가 되도록 그라비아 인쇄한 후, 60℃에서 건조 하여 보온재층 상부에 알루미늄 코팅층을 형성하였다.
다른 공정으로, 저밀도 폴리에틸렌(한화케미칼, HANWHA LDPE 955, 밀도:0.913)100 중량부에 대해 탄산칼슘(야바시 코리아, YK1C)55 중량부 혼화한 후 용융하였다. 필름 압출기에서 T-다이 압출한 후, 연신온도 70℃에서 2.5배로 1축연신하여 평량 30 g/㎡인 폴리올레핀 복합층을 형성하였다.
또 다른 공정으로, 부직포층은 폴리프로필렌 필라멘트 섬유를 방사하여 평량이 30 g/㎡로 되도록 연속 이동하는 벨트 상에 다층 웹으로 적층하여 열접착 시켜 형성하였다. 그라비아 롤 코팅 방법으로 폴리우레탄 접착제(성도케미칼, D-9800)를 상기 제조된 폴리올레핀 복합층 상에 평량이 5 g/㎡가 되도록 코팅한 후, 그 위에 상기 제조된 부직포을 적층시킨 후 가압롤러를 통과시켜 폴리올레핀 복합층을 부직포 상에 압착시켜 합지 시켰다.
상기 합지된 폴리올레핀 복합층과 부직포층의 부직포층면과 상기 보온재층의 상부에 알루미늄 코팅층이 형성된 알루미늄 코팅층면이 대면되도록 한 후, 가열압착하여 통기성 합지 보온재를 제조하였다.
[실시예 3]
상기 실시예 2에서 제조된 폴리올레핀 복합층상에 폴리우레탄 접착제(성도케미칼, D-9800)를 분무하여 코팅하는 것을 제외하고 상기 실시예 2와 동일한 방법으로 진행하여 통기성 합지 보온재를 제조하였다.
[실시예 4]
보온재(통기성 폴리에틸렌_(주)UPC, B-UP30, 폴리프로필렌 부직포_(주)UPC, NAP06003)를 이용하여 평량이 170 g/㎡가 되도록 보온재층을 형성한 후, 알루미늄분말(IDI Chemical, 실버 2)을 신너(미성화학, P.E 신너)에 분산시킨 용액을 상기 보온재층 양면에 평량이 3 g/㎡가 되도록 그라비아 인쇄한 후, 60℃에서 건조 하여 보온재층 상부에 알루미늄 코팅층을 형성하였다.
다른 공정으로, 저밀도 폴리에틸렌(한화케미칼, HANWHA LDPE 955, 밀도:0.913)100 중량부에 대해 탄산칼슘(야바시 코리아, YK1C)55 중량부 혼화한 후 용융하였다. 필름 압출기에서 T-다이 압출한 후, 연신온도 70℃에서 2.5배로 1축연신하여 평량 30 g/㎡인 폴리올레핀 복합층을 형성하였다.
또 다른 공정으로, 부직포층은 폴리프로필렌 필라멘트 섬유를 방사하여 평량이 30 g/㎡로 되도록 연속 이동하는 벨트 상에 다층 웹으로 적층하여 열접착 시켜 형성하였다. 그라비아 롤 코팅 방법으로 폴리우레탄 접착제(성도케미칼, D-9800)를 상기 제조된 폴리올레핀 복합층 상에 평량이 5 g/㎡가 되도록 코팅 한 후, 그 위에 상기 제조된 부직포을 적층시킨 후 가압롤러를 통과시켜 폴리올레핀 복합층을 부직포 상에 압착시켜 합지 시켰다.
상기 합지된 통기성접착층과 부직포층의 부직포층면과 상기 보온재층의 상부에 알루미늄 코팅층이 형성된 알루미늄 코팅층면이 대면되도록 한 후, 가열 압착하여 통기성 합지 보온재를 제조하였다.
[비교예 1]
보온제(통기성 폴리에틸렌_(주)UPC, B-UP30, 폴리프로필렌 부직포_(주)UPC, NAP06003)를 이용하여 평량이 170 g/㎡가 되도록 보온재층을 형성하였다.
다른 공정으로, 저밀도 폴리에틸렌(한화케미칼, HANWHA LDPE 955, 밀도:0.913)100 중량부에 대해 탄산칼슘(야바시코리아, YK1C)55 중량부 혼화한 후 용융하였다. 필름 압출기에서 T-다이 압출한 후, 연신온도 70℃에서 2.5배로 1축연신하여 평량 30 g/㎡인 폴리올레핀 복합층을 형성하였다.
또 다른 공정으로, 부직포층은 폴리프로필렌 필라멘트 섬유를 방사하여 평량이 30 g/㎡로 되도록 연속 이동하는 벨트 상에 다층 웹으로 적층하여 열접착 시켜 형성하였다. 상기 제조된 부직포층 상에 상기 제조된 폴리올레핀 복합층을 적층시킨 후 170℃ 온도에서 75 ㎏/㎠의 압력으로 가열 압착하여 폴리올레핀 복합층을 부직포 상에 압착시켜 합지 시켰다.
상기 합지된 폴리올레핀 복합층과 부직포층의 부직포층면과 상기 보온재층면이 대면되도록 한 후, 170℃ 온도에서 75 ㎏/㎠의 압력으로 가열 압착하여 통기성 합지 보온재를 제조하였다.
[비교예 2]
보온재(통기성 폴리에틸렌_(주)UPC, B-UP30, 폴리프로필렌 부직포_(주)UPC, NAP06003)를 이용하여 평량이 170 g/㎡가 되도록 보온재층을 형성하였다.
다른 공정으로, 저밀도 폴리에틸렌(한화케미칼, HANWHA LDPE 955, 밀도:0.913)100 중량부에 대해 탄산칼슘(야바시 코리아, YK1C)55 중량부 혼화한 후 용융하였다. 필름 압출기에서 T-다이 압출한 후, 연신온도 70℃에서 2.5배로 1축연신하여 평량 30 g/㎡인 폴리올레핀 복합층을 형성하였다.
또 다른 공정으로, 부직포층은 폴리프로필렌 필라멘트 섬유를 방사하여 평량이 30 g/㎡로 되도록 연속 이동하는 벨트 상에 다층 웹으로 적층하여 열접착 시켜 형성하였다. 그라비아 롤 코팅 방법으로 폴리우레탄 접착제(성도케미칼, D-9800)를 상기 제조된 폴리올레핀 복합층상에 평량이 5 g/㎡가 되도록 코팅한 후, 그 위에 상기 제조된 부직포을 적층시킨 후 가압롤러를 통과시켜 폴리올레핀 복합층을 부직포 상에 압착시켜 합지 시켰다.
상기 합지된 통기성접착층과 부직포층의 부직포층면과 상기 보온재층면이 대면되도록 한 후, 가170℃ 온도에서 75 ㎏/㎠의 압력으로 가열 압착하여 통기성 합지 보온재를 제조하였다.
상기 표 1로부터, 본 발명의 통기성 합지 보온재에 알루미늄 코팅층이 일면 또는 양면에 포함됨으로써, 투습도는 유지되며, 인장강도, 파단강도, 신율, 사다리꼴 인열 및 물투과저항이 향상되는 것을 확인하였다.
Claims (9)
- 보온재층, 보온재층의 일면 또는 양면에 형성된 알루미늄 코팅층, 상기 알루미늄 코팅층 상부에 형성된 부직포층, 상기 부직포층 상부에 적층된 폴리올레핀수지와 무기입자의 혼합물로부터 제조되는 폴리올레핀 복합층을 포함하는 통기성 합지 보온재.
- 제 1항에 있어서,상기 폴리올레핀 복합층은 폴리올레핀 수지 100 중량부에 대하여, 무기입자 10 ~ 200 중량부 포함하여 압출 시트를 제조한 후, 연신하여 통기성을 부여하는 것인 통기성 합지 보온재.
- 제 1항에 있어서,상기 부직포층 및 폴리올레핀 복합층 사이에 통기성 접착층을 더 포함하는 것인 통기성 합지 보온재.
- 제 3항에 있어서,상기 통기성 접착층은 접착제를 분무코팅하거나 또는 그라비아 롤 코팅하여 접착제의 코팅부와 비코팅부를 가지도록 하여 통기성을 갖도록 하는 통기성 합지 보온재.
- 제 1항에 있어서,상기 알루미늄 코팅층은 알루미늄 입자를 포함하는 용액을 코팅하거나, 증착하여 제조되는 것인 통기성 합지 보온재.
- 제 5항에 있어서,상기 코팅은 스크린 코팅 또는 그라비아 롤 코팅에 의해 코팅하는 것인 통기성 합지 보온재.
- 제 1항에 있어서,상기 보온재층의 보온재는 솜, 니들펀칭 부직포, 플라스틱폼, 멜트브론 부직포, 섬유직물 및 직조물에서 선택되는 하나 또는 둘 이상인 것인 통기성 합지 보온재.
- 제 1항에 있어서,상기 보온재층은 평량이 25 ~ 800 g/㎡, 알루미늄 코팅층 1 ~ 80 g/㎡, 부직포층은 평량이 10 ~ 60 g/㎡, 폴리올레핀 복합층은 평량이 10 ~ 100 g/㎡인 것인 통기성 합지 보온재.
- 제 3항에 있어서,상기 통기성 접착층은 평량이 1 ~ 10 g/㎡인 것인 통기성 합지 보온재.
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CN201580046556.7A CN106604630A (zh) | 2014-08-29 | 2015-08-27 | 透气性贴合保温材料 |
US15/507,224 US20170282511A1 (en) | 2014-08-29 | 2015-08-27 | Air-permeable laminate insulation material |
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KR1020140114003A KR101643540B1 (ko) | 2014-08-29 | 2014-08-29 | 통기성 합지 보온재 |
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US10729080B2 (en) * | 2017-05-05 | 2020-08-04 | Benjamin Jon Staffeldt | Vertical aeroponic growing apparatus |
JP7005938B2 (ja) * | 2017-05-24 | 2022-02-10 | 大日本印刷株式会社 | 農業シート |
KR101890547B1 (ko) * | 2018-02-12 | 2018-08-22 | 이종석 | 농업용 보온덮개 |
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- 2015-08-27 US US15/507,224 patent/US20170282511A1/en not_active Abandoned
- 2015-08-27 CN CN201580046556.7A patent/CN106604630A/zh active Pending
- 2015-08-27 WO PCT/KR2015/008959 patent/WO2016032244A1/ko active Application Filing
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CN106604630A (zh) | 2017-04-26 |
US20170282511A1 (en) | 2017-10-05 |
KR20160026103A (ko) | 2016-03-09 |
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