EP3992399A1 - Profil zur herstellung einer lamelle für eine schwimmbeckenabdeckung und verwendung einer kunststoffzusammensetzung in einer schwimmbeckenabdeckung - Google Patents

Profil zur herstellung einer lamelle für eine schwimmbeckenabdeckung und verwendung einer kunststoffzusammensetzung in einer schwimmbeckenabdeckung Download PDF

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Publication number
EP3992399A1
EP3992399A1 EP21196597.5A EP21196597A EP3992399A1 EP 3992399 A1 EP3992399 A1 EP 3992399A1 EP 21196597 A EP21196597 A EP 21196597A EP 3992399 A1 EP3992399 A1 EP 3992399A1
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EP
European Patent Office
Prior art keywords
profile
top wall
plastic
light transmittance
swimming pool
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.)
Pending
Application number
EP21196597.5A
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English (en)
French (fr)
Inventor
Ludo VERVOORT
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.)
Technics & Applications Afgekort T&a BV
Technics & Applications Afgekort T&a Bvpa
Original Assignee
Technics & Applications Afgekort T&a BV
Technics & Applications Afgekort T&a Bvpa
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Filing date
Publication date
Application filed by Technics & Applications Afgekort T&a BV, Technics & Applications Afgekort T&a Bvpa filed Critical Technics & Applications Afgekort T&a BV
Publication of EP3992399A1 publication Critical patent/EP3992399A1/de
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00—Swimming or splash baths or pools
    • E04H4/06—Safety devices; Coverings for baths
    • E04H4/08—Coverings consisting of rigid elements, e.g. coverings composed of separate or connected elements
    • E04H4/082—Coverings consisting of rigid elements, e.g. coverings composed of separate or connected elements composed of flexibly or hingedly-connected slat-like elements, which may or may not be wound-up on a fixed axis
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00—Swimming or splash baths or pools
    • E04H4/06—Safety devices; Coverings for baths

Definitions

  • the present invention relates to a profile for manufacturing a slat for a swimming pool cover, in particular a rollable swimming pool cover, and a swimming pool cover, more particularly a rollable swimming pool cover, that is made from such profiles.
  • the invention also relates to the use of a plastic composition in a swimming pool cover.
  • Such profiles and swimming pool covers are known from, for example, AU-A-21669/95 , FR2761711A1 , DE29604839U1 and FR2719622A1 .
  • the underside of the profiles is black and the upper side is transparent, such that overheating of the upper side is avoided, but sunlight is maximally absorbed by the underside of the profiles, whereby this heat can be released again to the swimming pool water to thereby heat up the swimming pool water. Beause of the black underside this also limits algae growth in the swimming pool and/or this algae growth is not visible.
  • Such profiles are also called 'Solar' profiles.
  • Such profiles and swimming pool covers are known from, for example, DE3044949A1 and DE4101727A1 .
  • top walls and optionally the side wall of the groove are opaque, such that little or no sunlight can enter the groove and algae development is limited and avoided. Also, because of this, contaminations in the grooves, such as leaves and dead insects, are hidden from view.
  • Such profiles and swimming pool covers are known from, for example, DE19646117C1 , DE10103204A1 and EP2295676B1 .
  • these profiles have the disadvantage that, when they are assembled into a swimming pool cover, the upper side of this swimming pool cover does not look homogeneous, but rather striped. This is the case because the top wall of the profile at the location of the groove is black or because at the location of the groove a black wall lies close below a transparent top wall, while at other locations than the groove the black bottom wall is located at a much larger distance from the transparent top wall. This means that the black colour at the location of the groove is much more explicitly visible than in other locations, resulting in a striped, zebra-like pattern.
  • the known profiles with a transparent top wall also have the disadvantage that condensation droplets on the inside of the profiles are clearly visible. Such droplets of condensation water may form on the inside of the profiles due to condensation of water vapor, especially due to cooling at night, and are unattractive.
  • the present invention concerns a profile for manufacturing a slat for a rollable swimming pool cover, wherein the profile is made of plastic, wherein the profile comprises one or more internal hollow channels extending in the profile direction, wherein the profile comprises a first top wall located above the one or more hollow channels, wherein the first top wall has a first relative light transmittance for infrared light and a second relative light transmittance for visible light, wherein the ratio (one minus the second relative light transmittance)/(one minus the first relative light transmittance) is at least 1.10.
  • the values (1 - the first relative light transmittance) and (1 - the second relative light transmittance) indicate which fraction of the light in the respective wavelength range is absorbed or reflected by the first top wall.
  • the first and second relative light transmittance are expressed as fractions.
  • first and second relative light transmittance when expressed as percentage, should first be divided by 100 to obtain the first and second relative light transmittance expressed as fraction.
  • these values are dependent on the composition and thickness of the first top wall, and in particular on the concentration of intentionally added chemical compounds and other products present therein that absorb or reflect visible light better than infrared light. These values are also dependent on other components in the first top wall that can also absorb or reflect light over the entire spectrum or over a portion thereof. This concerns in particular the plastic itself of which the top wall is made.
  • infrared means the wavelength range between 800 nm and 1400 nm, which approximately corresponds to what is called the near infrared band
  • visible light means the wavelength range between 400 nm and 700 nm.
  • the ratio (1 - the second relative light transmittance)/(1 - the first relative light transmittance) is at least 1.4, and more preferably at least 1.8, and even more preferably at least 2.5.
  • the profile direction is the direction in which a cross section of the profile remains the same.
  • first relative light transmittance and the second relative light transmittance concern the same part of the first top wall, in other words the same position on the first top wall.
  • Such a profile has the advantage that the first top wall appears dark, due to its low second relative light transmittance, such that the striped, zebra-like pattern is less noticeable.
  • such a first top wall still transmits a significant portion of the energy in sunlight, namely a relatively large portion of the infrared light supplemented with a smaller, but not necessarily negligible portion of the visible light.
  • the bottom wall of such a profile can still absorb a significant portion of the energy in sunlight and deliver it to the swimming pool water to heat it up.
  • the basis of the invention is the insight that a significant portion of the energy in sunlight is located in the infrared portion of the spectrum, such that the transmittance of the top wall for visible light only determines to a limited extent how much energy from sunlight such a profile can absorb in order to transfer it to the pool water. This in contrast to the already known disclosures in which only the visible portion of the spectrum is considered.
  • the properties of the first top wall in particular the concentration of an additive that selectively blocks visible light but transmits infrared light and the layer thickness of a plastic layer in which it is present, can be chosen such that virtually no visible light is transmitted.
  • the first layer of plastic can be completely black, such that the striped pattern and condensation droplets cannot be seen at all.
  • the degree to which, by means of the invention, the undesired striped pattern is visually suppressed can be selected taking into account other desirable characteristics such as total light transmittance and colour intensity.
  • the profile on a first side is provided with a groove for receiving a coupling member, wherein the groove has a second top wall on its top side, the second top wall having a third relative light transmittance to infrared light and a fourth relative light transmittance for visible light, wherein the ratio (one minus the fourth relative light transmittance) divided by (one minus the third relative light transmittance) is at least 1.10.
  • the second top wall also transmits said significant portion of the energy in sunlight such that a larger portion of the energy that irradiates the total surface of a swimming pool cover can be used for heating up the water.
  • the invention concerns: a profile for manufacturing a slat for a rollable swimming pool cover, wherein the profile is made of plastic, wherein the profile on a first side is provided with a groove for receiving a coupling member, wherein the groove has a second top wall at its top side, the second top wall having a third relative light transmittance for infrared light and a fourth relative light transmittance for visible light, wherein the ratio (one minus the fourth relative light transmittance) divided by (one min the third relative light transmittance) is at least 1.10.
  • the ratio (one minus the fourth relative light transmittance) divided by (one minus the third relative light transmittance) is at least 1.4, and more preferably at least 1.8, and even more preferably at least 2.0.
  • the first relative light transmittance is at least 0.40, and preferably at least 0.65.
  • a first relative light transmittance of 0.40 means that 40 % of the infrared light is transmitted and 60 % is not transmitted but is absorbed or reflected. This allows a large portion of the energy-rich infrared light to irradiate through the top wall to heat up the pool water.
  • the second relative light transmittance is a maximum of 0.65, and preferably a maximum of 0.50. This means that a maximum of 65 %, and preferably a maximum of 50 % of the visible light is transmitted, such that the first top wall is sufficiently dark.
  • the profile has a bottom wall below the one or more hollow channels, the bottom wall being opaque to both infrared light and visible light, and preferably black. This allows the sunlight to be well absorbed by the bottom wall of the profile to optimally heat up the pool water.
  • the profile has a groove on a first side for receiving a coupling member, wherein the groove has a second top wall on its top side, wherein the second top wall comprises a first layer of plastic that is opaque.
  • the profile is provided on a second side with a coupling member which is adapted to be inserted into the groove of another identical profile in order to thereby couple two profiles hingedly laterally to each other.
  • the coupling member is preferably opaque and preferably made of the same plastic composition as the bottom wall, such that the possibilities for light to enter the groove are even further limited.
  • the first layer of plastic and the bottom wall have a different colour.
  • the colour of the first plastic layer can be adapted to the apparent colour obtained by the combination of the first top wall and the bottom wall, in order to avoid to an even greater extent a striped zebra-like pattern.
  • the first top wall comprises one or more layers of plastic, wherein said one or more layers of plastic, optionally with a mutually different thickness, are also located above said first layer of plastic of the second top wall, wherein said one or more layers of plastic are located in the second top wall or are located in another wall, said other wall being located above the second top wall.
  • the invention further relates to a swimming pool cover comprising two or more mutually coupled slats, wherein the slats comprise a profile according to the invention.
  • the invention also relates to the use of a plastic composition in a swimming pool cover, wherein the plastic composition is adapted to transmit infrared light better than visible light.
  • the plastic composition has a first specific extinction for infrared light and a second specific extinction for visible light, whereby the ratio between the second specific extinction and the first specific extinction is at least 1.1.
  • the extinction includes both reflection and absorption.
  • I 1 is the emerging light intensity, i.e. the light intensity at the bottom side of the first top wall
  • I 0 the incident light intensity, i.e. the light intensity at the top side of the first top wall
  • ⁇ the extinction coefficient of the light-absorbing compound or compounds
  • c the concentration of the light-absorbing compound or compounds
  • d the thickness of the first top wall
  • the product of c and ⁇ is the specific extinction, and it is a material property of the various layers of the first top wall.
  • the ratio between the second specific extinction and the first specific extinction is at least 1.4, and more preferably at least 1.8.
  • Such a plastic composition is eminently suitable for making a profile according to the invention.
  • the plastic composition is used in a wall, in particular a top wall, of a slat forming part of the swimming pool cover.
  • the slat is made from a profile according to the invention.
  • the profile is an extruded profile that is made of polycarbonate.
  • the groove has an opaque side wall on the side facing the one or more internal hollow channels, such that obliquely incident light is prevented from reaching into the groove via this side wall where it may stimulate algae growth.
  • the top wall is minimally partially transparent in the visible range, but also coloured, and the first colour is chosen such that it does not differ much from the top wall colour, in order to avoid the zebra effect.
  • the invention also relates to a rollable swimming pool cover comprising two or more profiles laterally coupled to each other according to the invention.
  • the profile 1 shown in the Figures 1 to 4 has a total width B of 73 mm and a total height H of 14 mm. The relative dimensions of the various parts of the profile 1 are correctly shown in the figures.
  • the profile 1 extends in a profile direction P.
  • the profile 1 On a side, the profile 1 is provided with a coupling member 2 with a double hook shape. On the opposite side, the profile 1 is provided with a groove 3 which can receive such a coupling member 2, such that such profiles 1 can be laterally mutually coupled to form a swimming pool cover and are then hingedly coupled to each other.
  • the profile 1 comprises a bottom wall 4 and a first top wall 5 and a second top wall 6.
  • the first top wall 5 is connected to the bottom wall 4 by means of four connecting walls 7 which define three closed hollow channels 8 between the bottom wall 4 and the first top wall 5.
  • One of the connecting walls 7, in this example the rightmost connecting wall, also forms the side wall 9 of the groove 3.
  • the second top wall 6 is located above the groove 3 and is the top wall of this groove 3.
  • the first top wall 5 and the second top wall 6 together form a slightly curved common top wall without kink or angle at the junction between the first top wall 5 and the second top wall 6.
  • the bottom wall 4 extends in this example under both the hollow channels 8 and under the groove 3.
  • the profile 1 is, in this example, but not necessarily, made of polycarbonate, and is made by means of coextrusion of four plastic compositions.
  • the second top wall 6 consists of three layers of plastic and the first top wall 5 consists of two layers of plastic.
  • the bottom layer of the second top wall 6, hereinafter referred to as the first layer 10 of plastic, is made of opaque polycarbonate with added colorants to obtain the anthracite grey RAL colour 7016-P.
  • This first layer of plastic is opaque, that is to say that it does not transmit light.
  • the bottom wall 4 consists of one layer of plastic, hereinafter referred to as the second layer 11 of plastic, and it is made of polycarbonate with 0.5 % carbon black added thereto.
  • This second layer 11 of plastic is opaque and black.
  • the bottom layer of the first top wall 5, hereinafter referred to as the third layer 12 of plastic, is made of a coloured polycarbonate Makrolon 3113, coloured with colour 450601, supplied by the company Covestro. This coloured polycarbonate is mixed in a ratio of 1 to 4 with transparent Makrolon 3113 to produce the third layer 12.
  • This colour 450601 has been developed to allow infrared light selectively to pass through and to block visible light partially or completely by reflection or absorption.
  • Such dyes are available from a variety of suppliers, wherein the skilled person is able to easily determine the concentration themself depending on the desired visible light transmittance.
  • This third layer of plastic 12 continues into the second top wall 6, wherein said third layer 12 of plastic forms the middle layer of the second top wall 6.
  • This third layer 12 of plastic is tinted dark grey with a slightly purple hue, but is transparent, approximately like sunglasses.
  • the top layer of the first top wall 5, hereinafter referred to as the fourth layer 13 of plastic, is made of transparent polycarbonate with an additive that blocks UV light.
  • the fourth layer 13 of plastic continues into the second top wall 6 and forms the top layer of the second top wall 6.
  • the coupling member 2 is made of the same material as the bottom wall 4.
  • the upper part of the side wall 9 of the groove 3 consists of two layers, more specifically a layer of plastic which is located on the side of the hollow channels 8 and which is made of the same material as the third layer 12 of plastic and which adjoins the third layer 12 plastic, and a layer of plastic which is located on the side of the groove 3 and which has the same composition as the first layer 10 of plastic.
  • the bottom part of the side wall 9 of the groove 3 is made of the same material as the bottom wall 4.
  • the total wall thickness of the first top wall 5, the second top wall 6 and the bottom wall 4 is approximately 0.9 mm.
  • the relative light transmittance of the first top wall 5 is measured with a Cary 500 UV-VS NIR spectrophotometer. The results are shown in Figure 7 , wherein the horizontal axis represents the wavelength in nanometres and the vertical axis the relative light transmittance in %.
  • the first top wall 5 has an average relative light transmittance of 24.1 %, i.e. 0.241.
  • the first top wall 5 has an average relative light transmittance of 87.0 %, i.e. 0.87.
  • first top wall 5 transmits a significant portion of the energy of sunlight, seen over the entire spectrum.
  • the underlying parts of the profile 1 are hardly visible, such that this already largely avoids the creation of a zebra-like pattern of dark lines and light lines if a swimming pool cover is made with these profiles 1.
  • the first layer 10 is designed in a slightly lighter colour than the bottom wall 4, the formation of a striped pattern is suppressed even further.
  • the alternative profile 1 of Figure 5 differs from the profile 1 of Figures 1 to 4 in that the fourth layer of plastic and the first layer of plastic are absent, wherein the third layer 12 of plastic has been designed correspondingly thicker. Furthermore, the composition of the third layer 12 of plastic is different, namely because it is made by mixing the aforementioned coloured polycarbonate Makrolon 3113, coloured with colour 450601, in a ratio of 1 to 1 with transparent Makrolon 3113.
  • first top wall 5 and second top wall 6 have a very dark grey colour.
  • the relative light transmittance of the first top wall 5 and the second top wall 6 was measured with a Cary 500 UV-VS NIR spectrophotometer. The results are shown in Figure 8 , wherein the horizontal axis represents the wavelength in nanometres and the vertical axis the relative light transmittance in %.
  • the first top wall 5 has an average relative light transmittance of 3.4 %, that is 0.034.
  • the first top wall 5 has an average relative light transmittance of 86.0 %, i.e. 0.860.
  • first top wall 5 transmits a significant portion of the energy of sunlight, seen over the entire spectrum, such that still a significant heating will take place.
  • second top wall 6 of the first profile 1 the second top wall 6 also transmits a significant portion of the energy of sunlight. This energy can therefore also be used for heating up the swimming pool water.
  • first top wall 5 and second top wall 6 allow virtually no visible light to pass through, firstly, algae growth in the groove will only occur to a very limited extent, because no visible sunlight can enter the groove 3.
  • a build-up of algae in the groove 3 is avoided. This exchange of water is very limited, but sufficient.
  • the third layer 12 and the fourth layer 13 of plastic are arranged in the second top wall 6, it is also possible that above the groove the top wall of the profile is located at some distance from the top wall of the groove, as is the case, for example, in the profile of Figure 5 of AU-A-21669/95 and Figure 1 of EP2295676B1 , such that in that case the third layer 12 and fourth layer 13 of plastic can also be arranged in a wall above the second top wall, i.e. in the top wall of the profile, which is located above the top wall of the groove.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP21196597.5A 2020-10-27 2021-09-14 Profil zur herstellung einer lamelle für eine schwimmbeckenabdeckung und verwendung einer kunststoffzusammensetzung in einer schwimmbeckenabdeckung Pending EP3992399A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE20205753A BE1028743B1 (nl) 2020-10-27 2020-10-27 Profiel voor het vervaardigen van een lamel voor een zwembadafdekking en gebruik van een kunststofsamenstelling in een zwembadafdekking

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EP3992399A1 true EP3992399A1 (de) 2022-05-04

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EP21196597.5A Pending EP3992399A1 (de) 2020-10-27 2021-09-14 Profil zur herstellung einer lamelle für eine schwimmbeckenabdeckung und verwendung einer kunststoffzusammensetzung in einer schwimmbeckenabdeckung

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BE (1) BE1028743B1 (de)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3044949A1 (de) 1980-11-28 1982-07-01 Georg 8000 München Almer Rolladen zum abdecken von fluessigkeitsbecken
DE4101727A1 (de) 1991-01-22 1992-07-30 Hans Heinz Helge Rolladenprofilstab
FR2719622A1 (fr) 1994-05-09 1995-11-10 Beloou Philippe Installation de couverture immergée de piscine.
AU2166995A (en) 1994-07-05 1996-01-18 Remco Roller Shutters (Aust) Pty Ltd Swimming pool cover and slat end cap arrangement
DE29604839U1 (de) 1996-03-15 1996-06-13 Melichar, Roland, 82549 Königsdorf Profilleiste für Schwimmbadabdeckungen und damit gebildete Schwimmbadabdeckung
DE19646117C1 (de) 1996-11-08 1998-06-10 Helge Hans Heinz Solarrolladen für Schwimmbadeabdeckungen
FR2761711A1 (fr) 1997-04-03 1998-10-09 Daniel Hebert Lame pour tablier de couverture de piscine comportant une levre de recouvrement et tablier obtenu
DE10103204A1 (de) 2001-01-24 2002-07-25 Hans-Heinz Helge Profil zum Separieren eines Raumes und Verfahren zur Herstellung des Profils sowie dessen Verwendung
EP2295676B1 (de) 2009-08-20 2017-11-22 Hans-Heinz Helge Solarprofil für Schwimmbadabdeckungen
EP3418474A1 (de) * 2017-06-19 2018-12-26 Hans-Heinz Helge Transparentes schwimmbadabdeckungsprofil
WO2019086739A1 (es) * 2017-10-30 2019-05-09 Arturo Carrillo Sanchez Lona o cubierta de vidrio celular elástico

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3044949A1 (de) 1980-11-28 1982-07-01 Georg 8000 München Almer Rolladen zum abdecken von fluessigkeitsbecken
DE4101727A1 (de) 1991-01-22 1992-07-30 Hans Heinz Helge Rolladenprofilstab
FR2719622A1 (fr) 1994-05-09 1995-11-10 Beloou Philippe Installation de couverture immergée de piscine.
AU2166995A (en) 1994-07-05 1996-01-18 Remco Roller Shutters (Aust) Pty Ltd Swimming pool cover and slat end cap arrangement
DE29604839U1 (de) 1996-03-15 1996-06-13 Melichar, Roland, 82549 Königsdorf Profilleiste für Schwimmbadabdeckungen und damit gebildete Schwimmbadabdeckung
DE19646117C1 (de) 1996-11-08 1998-06-10 Helge Hans Heinz Solarrolladen für Schwimmbadeabdeckungen
FR2761711A1 (fr) 1997-04-03 1998-10-09 Daniel Hebert Lame pour tablier de couverture de piscine comportant une levre de recouvrement et tablier obtenu
DE10103204A1 (de) 2001-01-24 2002-07-25 Hans-Heinz Helge Profil zum Separieren eines Raumes und Verfahren zur Herstellung des Profils sowie dessen Verwendung
EP2295676B1 (de) 2009-08-20 2017-11-22 Hans-Heinz Helge Solarprofil für Schwimmbadabdeckungen
EP3418474A1 (de) * 2017-06-19 2018-12-26 Hans-Heinz Helge Transparentes schwimmbadabdeckungsprofil
WO2019086739A1 (es) * 2017-10-30 2019-05-09 Arturo Carrillo Sanchez Lona o cubierta de vidrio celular elástico

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BE1028743B1 (nl) 2022-05-23

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