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EP2018096A1 - Film composite - Google Patents

Film composite

Info

Publication number
EP2018096A1
EP2018096A1 EP07718425A EP07718425A EP2018096A1 EP 2018096 A1 EP2018096 A1 EP 2018096A1 EP 07718425 A EP07718425 A EP 07718425A EP 07718425 A EP07718425 A EP 07718425A EP 2018096 A1 EP2018096 A1 EP 2018096A1
Authority
EP
European Patent Office
Prior art keywords
film
thermo
composite
threshold temperature
openings
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP07718425A
Other languages
German (de)
English (en)
Inventor
Karl-Heinz Ringl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of EP2018096A1 publication Critical patent/EP2018096A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • A01G13/00—Protection of plants
    • A01G13/30—Ground coverings
    • A01G13/32—Mats; Nets; Sheets or films
    • A01G13/33—Sheets or films
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25—Greenhouse technology, e.g. cooling systems therefor

Definitions

  • the invention relates to a film composite comprising at least one, preferably translucent, film having a plurality of apertures distributed over the surface of the film composite, in particular holes and / or slots.
  • At least partially translucent films for covering plants are known in order to improve the growth conditions for the plants. Such films are for the
  • a disadvantage of such films is that they are always permeable to air and / or water, so for example, even at low ambient temperatures, if the
  • the object of the invention is therefore to provide a composite film of the type mentioned, with which the mentioned disadvantages can be avoided, and which allows cost and without control or monitoring effort a temperature management in a protected temperature-sensitive environment.
  • the film composite at least a first
  • a temperature management in a protected temperature-sensitive environment such as a greenhouse, a film tunnel or about an electrical, electronic and / or electromechanical device can be made possible at low cost and without control or monitoring effort. Due to the different spec. Thermal expansions of the two materials of the film composite can be achieved, that the openings automatically and without the need for targeted external manipulation or intervention at high temperatures, which may be caused by concentrated solar radiation, open and thus allows ventilation or an air exchange and moisture removal ,
  • this comprises a first film, which at least partially comprises the first material, and that this at least partially has a second film which at least partially comprises the second material.
  • first spec. Thermal expansion is smaller than the second spec. Thermal expansion.
  • the openings are arranged in the at least one first film, and that the at least one second film has closed areas which are arranged so that they cover the openings of the first film below the threshold temperature ,
  • a first preferred embodiment of a composite film according to the invention is formed, which is particularly simple in construction.
  • a variant of the invention may be that the at least one second film is designed as a closed surface and / or as a closed strip, which are each larger than the openings of the first film, and which are partially connected in the region of the openings with the first film , so due to the different spec.
  • Thermal expansion of the first film and the second film above the threshold temperature lifts the second film of the first film and so the apertures are permeable to air.
  • a film composite can be formed, which is a particularly simple self-regulating permeability change especially for air and / or water. Due to the larger spec. Thermal expansion of the second film expands at high temperatures stronger than the first film, and is therefore lifted from the opening.
  • this has at least a third material, which has a third spec. Has thermal expansion, and that the third spec. Thermal expansion is smaller than the second spec. Thermal expansion.
  • covers for the openings can be formed, which by the utilization of different spec. Thermal expansions are both particularly tightly covered or closed when the temperature is below the threshold temperature, and which are particularly wide open when the temperature is above the threshold temperature. This allows a particularly good and efficient ventilation through the film composite.
  • the latter has a third film which at least partially comprises the third material, and that preferably the third material is identical to the first material.
  • a particularly advantageous and simply constructed film composite according to the invention can be created.
  • Another possible embodiment may be that, at least in regions, the third film and the second film are joined, in particular laminated, and thus form a thermo-layer film.
  • the ⁇ notikelement be formed, which has similar properties as a bimetallic element, therefore, which bends under the influence of temperature changes.
  • large deflections can be achieved with small lengths of the thermo-layer films, whereby a particularly advantageous opening and closing of the openings can be achieved.
  • the third film is connected to the second film substantially on one side over its entire surface. As a result, a particularly good bending of the thermo-layer film is achieved.
  • thermo-layer film is arranged on at least one side in the region of one of the apertures on the first film, and that one of the second film associated surface of the thermo-layer film is connected to the first film so that the thermo-layer film below the threshold temperature, the respective opening in the Substantially completely obscured, and that the thermolayer film is lifted above the threshold temperature of the opening.
  • a simple and highly effective solution is achieved in which the openings below the threshold temperature are particularly effectively covered by the thermolayer films, and in which the openings above the threshold temperature are particularly wide open.
  • a predetermined plurality of thermo-layer films are provided, which are arranged like a roof tile overlapping. As a result, a film composite is created which has a particularly high breathability above the threshold temperature.
  • thermo-layer film is connected on both sides in the region of one of the apertures to the first film, so that the thermo-layer film substantially completely conceals the respective aperture below the threshold temperature, and that the thermo-layer film lifted above the threshold temperature of the opening.
  • thermo-layer film has at least a first region and a second region, in which the second film is arranged on the side of the third film facing the first film, and has at least one third region, which lies between the first and the second region is arranged, and that in the third region, the second film on the side facing away from the first film and / or the opening side of the third film is arranged.
  • thermo-layer film is connected to the second film substantially on one side over its entire surface, with the third film facing the first film.
  • thermo-layer film is substantially round, and that the round thermo-layer film is connected to the first film at at least two, in particular at least three, radially arranged contact regions.
  • thermo-layer film with the second film facing the first film, is arranged in the central region, that the thermo-layer film covered below the threshold temperature, the circularly arranged apertures, and that the thermolayer film is lifted above the threshold temperature of the opening.
  • the first material and / or the second material and / or the third material comprises a polymer, in particular a plastic. This makes it possible to form a film composite that is particularly easy to produce, lighter, less expensive, more resistant and more durable.
  • the invention further relates to a greenhouse with a roof and / or side walls comprising a film composite according to the invention.
  • greenhouses can be created, which automatically provide additional control measures at a certain, in the formation of the film composite predeterminable threshold temperature, for ventilation and prevent overheating of the greenhouse.
  • the openings or pores close automatically, and heat loss through air exchange with the outside environment is prevented without additional controlling or regulatory measures.
  • the invention further relates to a protective cover for electrical, electronic and / or electromechanical components, with a film composite according to the invention.
  • Fig. 1 shows a first embodiment of a erf ⁇ ndungswashen film composite in
  • Fig. 2 shows a second embodiment of a film composite according to the invention in
  • FIG. 4 shows a third embodiment of a film composite according to the invention in FIG.
  • FIG. 5 shows a film composite with further thermo-layer films according to the embodiment according to FIG.
  • FIG. 6 shows a fourth embodiment of a film composite according to the invention in FIG.
  • FIG. 7 shows a fifth embodiment of a film composite according to the invention in FIG.
  • FIG. 8 shows the embodiment according to FIG. 8 in plan view
  • Fig. 9 is a view according to FIG. 7 below the threshold temperature.
  • FIG. 1 to 8 show a film composite 4 comprising at least one, preferably translucent, film, with a plurality of distributed over the surface of the film composite 4 openings 5, in particular holes and / or slots, wherein the
  • Foil composite 4 comprises at least a first material and a second material, wherein the first material is a first spec. Thermal expansion has, and the second
  • film composites 4 of the invention can be inexpensively and without control or
  • a temperature management in a protected temperature-sensitive environment such as a greenhouse, a film tunnel or about
  • an electrical, electronic and / or electromechanical device are possible. Due to the different spec. Thermal expansions of the two materials of the film composite 4 can be achieved that the openings 5 automatically and without the need for targeted manipulation or intervention at high temperatures, which may be caused by concentrated solar radiation, open and such a ventilation or an air exchange and moisture removal allows. Due to the different spec. Thermal expansions of the first material and the second material is achieved that different areas of the film composite 4 expand differently in temperature changes. It can thereby be achieved that apertures 5 which are suitably arranged open or close without additional intervention in the event of temperature changes, in such a way that apertures 5 open above a threshold temperature and close below the threshold temperature. For materials which have a hysteresis behavior with respect to their temperature-dependent expansion, the threshold temperature may also be a temperature range, therefore the openings 5 open when a first temperature is exceeded and close when a second temperature is undershot.
  • film composites 4 according to the invention is preferably provided for use as a roof and / or side walls in greenhouses, and as a protective cover for electrical, electronic and / or electromechanical components.
  • Foil composites 4 according to the invention can have any dimension, wherein it may be preferred and provided with regard to the preferred areas of use that the foil composite 4 be used as a roll or roll.
  • the meter can be provided with widths between Im and about 20m.
  • the perforations 5, in particular designed as slots and / or holes are arranged substantially uniformly distributed over the entire surface of the film composite 4, whereby locally different distribution frequencies can be provided, wherein each predeterminable plurality of openings on a film composite 4 may be provided.
  • the openings 5 can have any dimension, wherein an opening 5 is smaller than the dimensions of the entire composite film 4.
  • inventive film composites 4 can be provided that the openings 5 as a substantially round holes with a Diameter between 0, 01mm and 10mm, especially between 0.1 and 1mm, preferably between 0.3 mm and 0.7 mm are executed, wherein on a film composite 4 also differently configured openings 5 can be provided.
  • a composite film 4 according to the invention provision is made in particular for the latter comprising a first film 1 which at least partially comprises the first material and at least partially has a second film 2 which at least partially comprises the second material. preferably the first spec. Thermal expansion is smaller than the second spec. Thermal expansion.
  • illustrated film composites 4 is provided in each case that the openings 5 are arranged in the at least one first film 1, and that the at least one second film 2 has closed areas 6, which are arranged so that these below the threshold temperature, the apertures 5 of the first film 1 obscure, with the only particularly preferred embodiments shown in the figures, if they show a film composite 4, respectively, except for Fig. 9, a film composite 4 above the threshold temperature show, therefore, the openings 5 are open and an air passage is possible.
  • the at least one second film 2 is designed as a closed surface and / or as a closed strip 7, which is larger than the openings 5 of the first film 1, and which in the region of the openings 5 is partially connected to the first film 1, so that due to the different spec.
  • Thermal expansion of the first film 1 and the second film 2 above the threshold temperature the second film 2 lifts from the first film 1 and so the apertures 5 are permeable to air.
  • the strip-shaped above the opening 5 arranged second film 2 is lifted above the threshold temperature of the first sheet 1 and thus forms a tunnel which is open on at least one side, so that air can penetrate through this.
  • the second film 2 lies completely on the first film 1 and thus closes the aperture 5.
  • this at least a third material 3 which has a third spec. Thermal expansion which is smaller than the second spec. Thermal expansion.
  • the film composite 4 is a third film 3 which at least partially comprises the third material.
  • the third material is identical to the first material.
  • FIGS. 2 to 8 show particularly preferred embodiments of film composites 4 according to the invention, in which the third film 3 and the second film 2 are joined together, in particular laminated, at least in regions, and thus form a thermal film 8.
  • a thermo-layer film 8 operates according to the known principle of the bimetal. Two materials with different spec. Thermal expansions are firmly connected to one another. When the temperature changes, bending or twisting of the thus formed composite material occurs.
  • the first material and / or the second material and / or the third material comprises a polymer, in particular a plastic.
  • any plastic or polymer may be provided which is suitable for processing as a film or for forming a film, and / or for forming thermo-layer films 8.
  • inventive film composites 4 can be provided that the spec. Thermal expansion of the first and second material and the second and third material is very different.
  • the first and / or the third material comprise polytetrafluoroethylene and / or polychlorotrifluoroethylene, which has a low spec.
  • the second material comprises polyethylene, in particular low density, and / or polyvinyl acetate.
  • the second film 2 and the third film 3 are preferably welded and / or glued, wherein the gluing can be provided with an additional adhesive layer, but also the gluing with solvents.
  • the third film 3 is connected to the second film 2 substantially on one side over its entire surface.
  • one, in particular strip-shaped, thermo-layer film 8 is arranged at least on one side in the region of one of the perforations 5 on the first film 1, and that one of the second film 2 associated surface of the thermo-layer film 8 with the first film. 1 is connected, so that the thermo-layer film 8 below the threshold temperature, the respective aperture 5 substantially completely obscured, and that the thermo-layer film 8 is lifted above the threshold temperature of the opening 5.
  • thermo-layer films 8 which are lined up in each case, lie completely on the adjacent thermo-layer film 8 and thus close the openings 5.
  • FIG. 6 shows a fourth particularly preferred embodiment in which the third film 3 is connected to the second film 2 essentially on one side with its entire surface, the third film 3 facing the first film 1.
  • one, in particular strip-shaped, thermo-layer film 8 is connected to the first film 1 on both sides in the area of each of the perforations 5, so that the thermo-layer film 8 substantially completely covers the respective aperture 5 below the threshold temperature, and that the thermo-layer film 8 above the threshold temperature of the opening 5 is lifted.
  • the second film 2 and / or the thermo-layer film 8 is connected to the first film 1 by means of gluing and / or by welding.
  • thermo-layer film 8 is made essentially round, and that the round thermo-layer film 8 is connected to the first film 1 at at least two, in particular at least three, radially arranged contact regions 14. In such an embodiment, the thermo-layer film 8 bulges above the threshold temperature and forms vents.
  • FIG. 7 to 9 show an embodiment of a composite film 4 according to the invention in which a predeterminable plurality of apertures 5 are arranged circularly around a central region 9, and that one, in particular circular, thermo-layer film 8, with the second film 2 facing the first film 1, is arranged in the central region 9, that the thermo-layer film 8 below the threshold temperature covers the circularly arranged perforations 5, and that the thermo-layer film 8 is lifted above the threshold temperature of the opening 5.
  • a large number of apertures 5 can be covered with a small number of thermo-layer foils 8, since, for example, four as shown Openings 5 are covered by a thermo-layer film 8.
  • Fig. 7 shows a sectional view of a film composite 4 above the threshold temperature
  • Fig. 7 shows a sectional view of a film composite 4 above the threshold temperature
  • Fig. 8 shows a plan view of the fifth particularly preferred embodiment, for better illustration of the invention, the invisible lines are shown by dashed lines and provided with reference numerals.
  • thermo-layer film 8 has at least a first region 11 and a second region 12 in which the second film 2 is arranged on the side of the third film 3 facing the first film 1 is, and at least a third region 13 which is arranged between the first and the second region 11, 12, and that in the third region 13, the second film 2 on the first film 1 and / or the opening 5 opposite side of the third Foil 3 is arranged.
  • FIG. 3 shows the strip-shaped thermo-layer film 8 in plan view, with the invisible lines drawn in dashed lines for better illustration of the invention.
  • thermo-layer films 8 Due to the special construction of the thermo-layer films 8 in the second preferred embodiment, a particularly high degree of deformation can be achieved, whereby a particularly high degree of opening and an associated air flow rate can be achieved.
  • films composites 4 which are intended for use in greenhouses, it is provided that they are made substantially translucent.
  • the first sheet 1 is made substantially transparent, whereby this both lets through the necessary light for the plants, but hardly heated itself under the action of light.
  • the second film 2 and / or the thermo-layer film 8 are designed such that they heat more under the action of electromagnetic radiation, in particular sunlight, as the substantially translucent first film 1.
  • the second film 2 and / or the thermo-layer film 8 has a higher spec. sauceaumahmefahtechnik has, as the first film 1.
  • the spec. Heat-absorbing capacity refers to how much a material or a film 1, 2, 3 heats up under the action of an electromagnetic radiation, in particular light, preferably sunlight, with its infrared radiation components.
  • a higher spec. Heat capacity Accordingly, a material or a film means that a first test body heats up to a higher temperature than the second test body with the same type of electromagnetic radiation, ie the same radiation source, same intensity and same exposure time, which surface and mass are identical to the first test body, however a lower spec. Having heat-absorbing capacity.
  • the procurement of the surface can also be a role in this respect, for example, leads a matte surface to a higher spec. Heat-absorbing capacity, and a mirror-smooth or polished surface to a lower spec. réelleaufhahmeschreib. A higher spec. Heat-absorbing capacity can be achieved, for example, by the choice of material and / or in particular by the treatment of the surface, for example by matting, or by the choice of color. It can therefore be provided that the second film 2 and / or the thermo-layer film 8 is dark, in particular red, black and / or green. Further embodiments according to the invention have only a part of the features described, wherein each feature combination, in particular also of various described embodiments, can be provided.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Soil Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne un film composite (4) comprenant au moins un film de préférence transparent avec une pluralité de perforations (5), notamment des trous et/ou des encoches, réparties sur la surface du film composite (4). L'objectif de la présente invention est la gestion économique des températures d'un environnement à protéger et sensible à la température sans dépenses de contrôle ou de surveillance. À cet effet, le film composite (4) comprend au moins un premier matériau et un second matériau, le premier matériau présentant une première dilatation thermique spécifique, et le second matériau présentant une seconde dilatation thermique spécifique différente de la première dilatation thermique spécifique, de sorte que les perforations (5) deviennent perméables à l'air au-dessus d'une température seuil et redeviennent sensiblement imperméables en dessous de la température seuil.
EP07718425A 2006-05-05 2007-05-04 Film composite Withdrawn EP2018096A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA780/2006A AT503527B1 (de) 2006-05-05 2006-05-05 Folienverbund
PCT/AT2007/000211 WO2007128019A1 (fr) 2006-05-05 2007-05-04 Film composite

Publications (1)

Publication Number Publication Date
EP2018096A1 true EP2018096A1 (fr) 2009-01-28

Family

ID=38328925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07718425A Withdrawn EP2018096A1 (fr) 2006-05-05 2007-05-04 Film composite

Country Status (3)

Country Link
EP (1) EP2018096A1 (fr)
AT (1) AT503527B1 (fr)
WO (1) WO2007128019A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009144018A1 (fr) * 2008-05-30 2009-12-03 Gebr. Duerrbeck Kunststoffe Gmbh Système de film agricole à propriétés optiques spéciales
ES2975165T3 (es) * 2020-11-27 2024-07-03 Asterios Daios Lámina alargada para cubrir plantas de cultivo agrícola

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3698131A (en) * 1971-03-31 1972-10-17 Gates Rubber Co Plant cover and method
FR2132854B1 (fr) * 1971-04-12 1974-12-13 Mitsubishi Petrochemical Co
DE2714059A1 (de) * 1977-03-30 1978-10-12 Gustav Albrecht Witterungsaktive kunststoff-folienstreifen
EP0017498A1 (fr) * 1979-04-07 1980-10-15 B.S. Dollamore Limited Abri horticole
DE68926789T2 (de) * 1989-10-18 1996-11-14 Toray Industries Verfahren zur herstellung von stoff mit überlappenden lamellen
JP3211447B2 (ja) * 1993-01-25 2001-09-25 ダイキン工業株式会社 通気性シート状材料の積層方法
DE102005038863A1 (de) * 2004-09-06 2006-03-23 Silu Verwaltung Ag Mehrschichtfolie mit einstellbarer Wasserdampfdurchlässigkeit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007128019A1 *

Also Published As

Publication number Publication date
AT503527A1 (de) 2007-11-15
WO2007128019A1 (fr) 2007-11-15
AT503527B1 (de) 2012-06-15

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