DE29606533U1 - Multi-layer plastic pipe - Google Patents
Multi-layer plastic pipeInfo
- Publication number
- DE29606533U1 DE29606533U1 DE29606533U DE29606533U DE29606533U1 DE 29606533 U1 DE29606533 U1 DE 29606533U1 DE 29606533 U DE29606533 U DE 29606533U DE 29606533 U DE29606533 U DE 29606533U DE 29606533 U1 DE29606533 U1 DE 29606533U1
- Authority
- DE
- Germany
- Prior art keywords
- layer
- barrier layer
- plastic pipe
- diffusion barrier
- adhesion promoter
- 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.)
- Expired - Lifetime
Links
- 229920003023 plastic Polymers 0.000 title claims description 20
- 239000004033 plastic Substances 0.000 title claims description 20
- 239000010410 layer Substances 0.000 claims description 56
- 230000004888 barrier function Effects 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 18
- 239000011241 protective layer Substances 0.000 claims description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 238000009792 diffusion process Methods 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- 239000002318 adhesion promoter Substances 0.000 claims description 15
- 230000007935 neutral effect Effects 0.000 claims description 4
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 4
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 4
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- RZXDTJIXPSCHCI-UHFFFAOYSA-N hexa-1,5-diene-2,5-diol Chemical compound OC(=C)CCC(O)=C RZXDTJIXPSCHCI-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/022—Mechanical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/121—Rigid pipes of plastics with or without reinforcement with three layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7244—Oxygen barrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/08—Dimensions, e.g. volume
- B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
- B32B2309/105—Thickness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Description
Die Erfindung betrifft ein Mehrschicht-Kunststoffrohr insbesondere für Trink-, Brauch- oder Heizungswasser.The invention relates to a multilayer plastic pipe in particular for drinking, service or heating water.
1010
Im Sanitär- und Heizungsbereich werden neben Metallrohren auch Rohre aus Kunststoffen, z.B. Polyethylen (PE), eingesetzt. Die dabei verwendeten Kunststoffe sind für Sauerstoff durchlässig, weshalb sie mit einer (Sauerstoff -) Diffusions-Sperrschicht versehen werden, die im allgemeinen das das Fluid führende Basisrohr von außen umgeben.In the sanitary and heating sector, pipes made of plastics, e.g. polyethylene (PE), are used alongside metal pipes. The plastics used are permeable to oxygen, which is why they are provided with an (oxygen) diffusion barrier layer, which generally surrounds the base pipe carrying the fluid from the outside.
In der Praxis hat sich als Material für die Sperrschicht EVOH {Ethylen-Vinyl-Alkohol) bewährt. Die Diffusionssperrfunktion dieses Materials ist um so besser,In practice, EVOH (ethylene vinyl alcohol) has proven to be a good material for the barrier layer. The diffusion barrier function of this material is even better,
15 je trockener es ist. Nachteiligerweise ist EVOH-Material um so spröder, je trockener es ist. Da mit der zunehmenden Sprödizität aber eine Verringerung der Elastizität einhergeht, besteht die Gefahr der Rißbildung und des Aufbrechens sowie Abbröckeln des Materials15 the drier it is. The disadvantage is that EVOH material is more brittle the drier it is. However, as increasing brittleness is accompanied by a reduction in elasticity, there is a risk of cracking, breaking open and crumbling of the material
20 der Sperrschicht. Diese Gefahr ist insbesondere dann20 of the barrier layer. This danger is particularly
Telefon: (02 21) 9165 20 ■ Telefax: (&Ogr;221)Telephone: (02 21) 9165 20 ■ Fax: (&Ogr;221)
: {G IEJ) (O22J)^12O3O ■ Telegramm: Dompatent Köln: {G IEJ) (O22J)^12O3O ■ Telegram: Cathedral Patent Cologne
gegeben, wenn das Kunststoffrohr Längenveränderungen ausgesetzt ist, was bei Temperaturwechseln des durch in dem Rohr befindlichen Fluids der Fall ist.given when the plastic pipe is exposed to changes in length, which is the case when the temperature of the fluid in the pipe changes.
Der Erfindung liegt die Aufgabe zugrunde, ein Mehrschicht-Kunststoffrohr zu schaffen, dessen (Sauerstoff -) Diffusions-Sperrschicht dauerhauft erhalten bleibt, und zwar auch unter mechanischer Beanspruchung des Rohres infolge von Temperaturwechseln und/oder Rohrkrümmungen.The invention is based on the object of creating a multi-layer plastic pipe whose (oxygen) diffusion barrier layer is permanently maintained, even under mechanical stress on the pipe as a result of temperature changes and/or pipe bends.
Zur Lösung dieser Aufgabe wird mit der Erfindung ein Mehrschicht-Kunststoffrohr vorgeschlagen, das versehen ist mit einem Basisrohr und einer das Basisrohr umgebenden Sauerstoffdiffusions-Sperrschicht, die für Sauerstoff undurchlässig ist.To solve this problem, the invention proposes a multilayer plastic pipe which is provided with a base pipe and an oxygen diffusion barrier layer surrounding the base pipe which is impermeable to oxygen.
Nach der Erfindung ist vorgesehen, die Sperrschicht vor direkten Einflüssen (Temperatur, Luftfeuchtigkeit) von 0 außen durch eine Schutzschicht abzudecken. Die Sperrschicht ist damit im wesentlichen gleichbleibenden Bedingungen ausgesetzt, sofern es sich um Veränderungen von äußeren Einwirkungen handelt. Die Schutzschicht verhindert darüber hinaus eine Rißbildung, indem sie die Sperrschicht "zusammenhält". Durch die Schutzschicht ist die Sperrschicht beidseitig eingeschlossen und damit geschützt. Erfindungsgemäß ist die Wandstärke des Basisrohres und die Dicke der Schutzschicht in etwa gleich groß gewählt, so daß sich die Sauerstoffdiffu-0 sions-Sperrschicht in der neutralen Zone befindet. Da sich die Sperrschicht in der sogenannten neutralen Zone des Rohres befindet, d.h. die Stärken der jeweils zu beiden Seiten der Sperrschicht angeordneten Schicht bzw. Schichtenfolge im wesentlichen gleich sind, istAccording to the invention, the barrier layer is covered by a protective layer to protect it from direct influences (temperature, humidity) from the outside. The barrier layer is thus exposed to essentially constant conditions, provided that there are changes due to external influences. The protective layer also prevents cracking by "holding" the barrier layer together. The protective layer encloses the barrier layer on both sides and thus protects it. According to the invention, the wall thickness of the base tube and the thickness of the protective layer are chosen to be approximately the same, so that the oxygen diffusion barrier layer is in the neutral zone. Since the barrier layer is in the so-called neutral zone of the tube, i.e. the thicknesses of the layer or layer sequence arranged on both sides of the barrier layer are essentially the same,
• ··
die Sperrschicht weitestgehend vor Beschädigungen infolge von mechanischen Beanspruchungen in Form von Verbiegungen des Kunststoffrohres geschützt.the barrier layer is largely protected against damage caused by mechanical stress in the form of bending of the plastic pipe.
Der erfindungsgemäße Aufbau eines Kunststoffrohres ist insbesondere von Vorteil, wenn für die Sperrschicht ein sprödes Material wie EVOH eingesetzt wird. Die Schutzschicht sollte dabei vorteilhafterweise aus einem Material bestehen, das im Vergleich zu demjenigen der Sperrschicht eine wesentlich geringere Sprödizität aufweist und insofern als zähflüssig bezeichnet werden kann.The inventive construction of a plastic pipe is particularly advantageous if a brittle material such as EVOH is used for the barrier layer. The protective layer should advantageously consist of a material that has a significantly lower brittleness than that of the barrier layer and can therefore be described as viscous.
Grundsätzlich gilt für das erfindungsgemäße Mehrschicht-Kunststoffrohr, daß die Materialien der einzelnen Schichten unter den Gesichtspunkten im wesentlichen gleicher Temperaturausdehnungskoeffizienten und einer guten Haftung untereinander ausgewählt werden. Dies gilt auch für die Materialien von Haftvermittlerschich-0 ten, die sich zweckmäßigerweise zwischen Basisrohr und Diffusionssperre und/oder Diffusionssperre und Schutzschicht befinden. Die vorzugsweise auf die Sperrschicht aufgetragene Haftvermittlerschicht kann als Schutzschicht im weiteren Sinne aufgefaßt werden, die zusammen mit der eigentlichen Schutzschicht die Sperrschicht umgibt und schützt. Davon unberührt ist die Tatsache, daß als Material für die Schutzschicht ein Haftvermittlermaterial verwendet wird, der Haftvermittler also selbst die eigentliche Schutzshicht darstellt.Basically, the multilayer plastic pipe according to the invention is that the materials of the individual layers are selected with the aim of having essentially the same coefficient of thermal expansion and good adhesion to one another. This also applies to the materials of the adhesion promoter layers, which are conveniently located between the base pipe and the diffusion barrier and/or the diffusion barrier and the protective layer. The adhesion promoter layer, which is preferably applied to the barrier layer, can be understood as a protective layer in the broader sense, which, together with the actual protective layer, surrounds and protects the barrier layer. This does not affect the fact that an adhesion promoter material is used as the material for the protective layer, so that the adhesion promoter itself represents the actual protective layer.
Haftvermittlermaterialien sind bei Kunststoffrohren allgemein bekannt, so daß es an dieser Stelle keinerlei weiterer Details bedarf.Adhesion promoter materials are generally known for plastic pipes, so no further details are required at this point.
Nachfolgend wird anhand der Zeichnung ein Ausführungsbeispiel der Erfindung näher erläutert. In der Zeichnung ist ein Querschnitt durch ein Fünf-Schicht-Kunststoffrohr mit in der neutralen Zone angeordneter Sauerstoffdiffusions-Sperrschicht dargestellt.An embodiment of the invention is explained in more detail below with reference to the drawing. The drawing shows a cross section through a five-layer plastic pipe with an oxygen diffusion barrier layer arranged in the neutral zone.
Es sei vorausgeschickt, daß die Schichtdicken des in der Zeichnung im Querschnitt gezeigten Rohres weder relativ zueinander noch absolut maßstabsgerecht gezeichnet sind.It should be noted that the layer thicknesses of the pipe shown in cross-section in the drawing are neither relative to each other nor absolutely to scale.
Die Zeichnung zeigt im Querschnitt ein KunststoffrohrThe drawing shows a cross-section of a plastic pipe
3 0 mit einem bezüglich der Anordnung der Sperrschicht symmetrischen Wandaufbau. Auf die Innenschicht (Basisrohr 32) ist eine Haftvermittlerschicht 34 aufgebracht, die das Basisrohr 32 mit der Sauerstoffdiffusions-Sperrschicht 36 verbindet. Außen auf der Sperrschicht 36 befindet sich eine weitere Haftvermittlerschicht 38. Diese Schicht 38 ist von einer Außenschicht 40 umgeben, 0 die über die Haftvermittlerschicht 38 mit der Sperrschicht 3 6 verbunden ist. Die beiden Schichten 3 8 und3 0 with a wall structure that is symmetrical with respect to the arrangement of the barrier layer. An adhesion promoter layer 34 is applied to the inner layer (base tube 32), which connects the base tube 32 to the oxygen diffusion barrier layer 36. On the outside of the barrier layer 36 there is another adhesion promoter layer 38. This layer 38 is surrounded by an outer layer 40, 0 which is connected to the barrier layer 3 6 via the adhesion promoter layer 38. The two layers 3 8 and
4 0 bilden eine mehrlagige Schutzschicht 42 zum Schutz der Sperrschicht 36.4 0 form a multi-layer protective layer 42 to protect the barrier layer 36.
Die Summe der Dicken d32 und d34 von Basisrohr 32 und Haftvermittlerschicht 34 ist im wesentlichen gleich der Summe der Dicken d38 und d40 von Haftvermittlerschicht 3 8 und Außenschicht 40. Die Teildicken der Wandung des Kunststoffrohres 3 0 zu beiden Seiten der Sperrschicht 36 sind also im wesentlichen gleich.The sum of the thicknesses d 32 and d 34 of the base pipe 32 and the adhesion promoter layer 34 is essentially equal to the sum of the thicknesses d 38 and d 40 of the adhesion promoter layer 3 8 and the outer layer 40. The partial thicknesses of the wall of the plastic pipe 3 0 on both sides of the barrier layer 36 are therefore essentially equal.
Claims (4)
einer auf die Sauerstoffdiffusions-Sperrschichtan oxygen diffusion barrier layer (36) surrounding the base tube (32) which is impermeable to oxygen, and
one on the oxygen diffusion barrier layer
daß die Wandstärke (d32,d34) des Basisrohrescharacterized ,
that the wall thickness (d 32 ,d 34 ) of the base tube
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29606533U DE29606533U1 (en) | 1995-09-07 | 1996-04-10 | Multi-layer plastic pipe |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29514395 | 1995-09-07 | ||
| DE29606533U DE29606533U1 (en) | 1995-09-07 | 1996-04-10 | Multi-layer plastic pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE29606533U1 true DE29606533U1 (en) | 1996-06-05 |
Family
ID=8012746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE29606533U Expired - Lifetime DE29606533U1 (en) | 1995-09-07 | 1996-04-10 | Multi-layer plastic pipe |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE29606533U1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6279614B1 (en) | 1997-03-29 | 2001-08-28 | Hewing Gmbh | Multi-layer plastic tube |
| DE10111534A1 (en) * | 2001-03-10 | 2002-09-19 | Gabo Systemtech Gmbh | Plastic pipe comprises a thin inner layer of high quality material suitable for drinking water supply systems, and an outer carrier layer consisting of a lower quality material |
| DE10318328B3 (en) * | 2003-04-19 | 2004-07-15 | Uponor Innovation Ab | Bonded plastic-metal tube for heating installation has plastic base tube with oxygen diffusion blocking layer on it and layer of bonding material on that, with metal band on it |
| DE10326410A1 (en) * | 2003-06-12 | 2005-01-05 | Rehau Ag + Co. | Polymer diffusion and wear protection layers for drinking water pipes made of plastic |
| DE202005016213U1 (en) * | 2005-10-13 | 2007-03-01 | Aquatherm Besitzgesellschaft Mbh | Matrix for heating and/or cooling room has extruded rectangular pipes with inner and outer coatings consisting of or containing polypropylene, between which oxygen barrier coating is arranged |
| EP1064487B2 (en) † | 1998-03-23 | 2013-02-13 | Uponor AB | Multilayer plastic pipe and its use |
-
1996
- 1996-04-10 DE DE29606533U patent/DE29606533U1/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6279614B1 (en) | 1997-03-29 | 2001-08-28 | Hewing Gmbh | Multi-layer plastic tube |
| EP1064487B2 (en) † | 1998-03-23 | 2013-02-13 | Uponor AB | Multilayer plastic pipe and its use |
| DE10111534A1 (en) * | 2001-03-10 | 2002-09-19 | Gabo Systemtech Gmbh | Plastic pipe comprises a thin inner layer of high quality material suitable for drinking water supply systems, and an outer carrier layer consisting of a lower quality material |
| DE10318328B3 (en) * | 2003-04-19 | 2004-07-15 | Uponor Innovation Ab | Bonded plastic-metal tube for heating installation has plastic base tube with oxygen diffusion blocking layer on it and layer of bonding material on that, with metal band on it |
| DE10326410A1 (en) * | 2003-06-12 | 2005-01-05 | Rehau Ag + Co. | Polymer diffusion and wear protection layers for drinking water pipes made of plastic |
| DE202005016213U1 (en) * | 2005-10-13 | 2007-03-01 | Aquatherm Besitzgesellschaft Mbh | Matrix for heating and/or cooling room has extruded rectangular pipes with inner and outer coatings consisting of or containing polypropylene, between which oxygen barrier coating is arranged |
| EP1775506A2 (en) | 2005-10-13 | 2007-04-18 | Aquatherm Besitzgesellschaft mbH | Register |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R207 | Utility model specification |
Effective date: 19960718 |
|
| R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 19990830 |
|
| R151 | Utility model maintained after payment of second maintenance fee after six years |
Effective date: 20021002 |
|
| R152 | Utility model maintained after payment of third maintenance fee after eight years |
Effective date: 20040927 |
|
| R071 | Expiry of right |