CN211875323U - Novel 5-layer oxygen-blocking pipe for water heating - Google Patents
Novel 5-layer oxygen-blocking pipe for water heating Download PDFInfo
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- CN211875323U CN211875323U CN202020411440.7U CN202020411440U CN211875323U CN 211875323 U CN211875323 U CN 211875323U CN 202020411440 U CN202020411440 U CN 202020411440U CN 211875323 U CN211875323 U CN 211875323U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000010410 layer Substances 0.000 claims abstract description 182
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000001301 oxygen Substances 0.000 claims abstract description 58
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 58
- 239000004677 Nylon Substances 0.000 claims abstract description 54
- 229920001778 nylon Polymers 0.000 claims abstract description 54
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims abstract description 44
- 239000004715 ethylene vinyl alcohol Substances 0.000 claims abstract description 39
- 239000004831 Hot glue Substances 0.000 claims abstract description 38
- 230000000903 blocking effect Effects 0.000 claims abstract description 16
- 229920006015 heat resistant resin Polymers 0.000 claims abstract description 13
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 claims abstract 5
- -1 polybutylene Polymers 0.000 claims description 14
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 8
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 8
- 229920001748 polybutylene Polymers 0.000 claims description 8
- 229920000571 Nylon 11 Polymers 0.000 claims description 6
- 229920000572 Nylon 6/12 Polymers 0.000 claims description 6
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 claims description 5
- 229920000299 Nylon 12 Polymers 0.000 claims description 5
- 229920002292 Nylon 6 Polymers 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 abstract description 33
- 239000000463 material Substances 0.000 abstract description 21
- 239000007789 gas Substances 0.000 abstract description 6
- 241000256602 Isoptera Species 0.000 abstract description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 241000700159 Rattus Species 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 229920000573 polyethylene Polymers 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 7
- 229920000098 polyolefin Polymers 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 229920001179 medium density polyethylene Polymers 0.000 description 2
- 239000004701 medium-density polyethylene Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229920005672 polyolefin resin Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Images
Abstract
The utility model relates to the technical field of oxygen-resisting pipes, in particular to a novel 5-layer oxygen-resisting pipe for water heating, which comprises a heat-resistant resin layer, a first hot-melt adhesive layer, an EVOH oxygen-resisting layer, a second hot-melt adhesive layer and a nylon layer from inside to outside in sequence; the thickness of the tube wall of the oxygen blocking tube is 1.5-5.0 mm; the outer diameter of the oxygen blocking pipe is 10-32 mm. The utility model provides a hinder the relatively poor problem of outer barrier propterty of oxygen pipe among the prior art. The EVOH oxygen barrier layer of the 5-layer oxygen barrier tube is arranged in the middle, so that excessive moisture adsorption caused by direct contact of the EVOH oxygen barrier layer and the atmosphere is avoided, and the gas barrier property of the oxygen barrier tube is greatly reduced; the outermost layer of the oxygen barrier pipe is made of nylon, and the nylon material has higher tensile strength, better crack resistance and better wear resistance, and has the functions of preventing rats from being bitten and preventing termites to a certain degree.
Description
Technical Field
The utility model relates to an hinder oxygen pipe technical field, especially relate to a novel 5 layers hinder oxygen pipe for hot-water heating.
Background
The oxygen-resistant pipe is widely applied to the fields of water heating and bathrooms which need to convey hot water, such as floor heating, radiator heating and the like, and is also applied to the field of conveying other hot fluids.
The three-layer oxygen-blocking type heat-resistant polyethylene pipe is suitable for a low-temperature radiation floor heating system. The three-layer oxygen-barrier heat-resistant polyethylene pipe is made of a medium-density Polyethylene (PE) base material and has enhanced high-temperature resistance. The unique molecular structure provides a non-crosslinked heating pipe with high strength, fatigue resistance and excellent crack stress resistance, and the pipe is in reference to and meets DIN 4726 oxygen permeation standard.
In the prior art, polyolefin resin is also adopted as a pipe material of the outer layer of the pipe wall in the oxygen-resisting pipe, and the polyolefin resin has poor protective performance, so that the service life of the oxygen-resisting pipe is short.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcomings of the prior art, an object of the present invention is to provide a novel 5-layer oxygen-blocking pipe for water heating, which is used to solve the problem of poor protection performance of the outer layer of the oxygen-blocking pipe in the prior art. The 5-layer oxygen-resisting pipe of the utility model is sequentially provided with the heat-resisting resin layer, the first hot melt adhesive layer, the EVOH oxygen-resisting layer, the second hot melt adhesive layer and the nylon layer from inside to outside, the EVOH oxygen-resisting layer is arranged in the middle part, and the situation that the EVOH oxygen-resisting layer is in direct contact with the atmosphere to cause excessive moisture adsorption is avoided, so that the barrier property of the oxygen-resisting pipe to gas is greatly reduced; the outermost layer of the 5-layer oxygen barrier pipe is made of nylon, and the nylon material has higher tensile strength, better crack resistance and better wear resistance and has the functions of preventing rat bite and termite bite to a certain degree.
In order to achieve the above objects and other related objects, the present invention provides a novel 5-layer oxygen-blocking pipe for water heating, wherein the 5-layer oxygen-blocking pipe comprises a heat-resistant resin layer, a first hot-melt adhesive layer, an EVOH oxygen-blocking layer, a second hot-melt adhesive layer and a nylon layer from inside to outside; the thickness of the tube wall of the 5 layers of oxygen blocking tubes is 1.5-5.0 mm, and the outer diameter of the 5 layers of oxygen blocking tubes is 10-32 mm.
The 5 layers of oxygen-resisting pipes are sequentially provided with the heat-resistant resin layer, the first hot melt adhesive layer, the EVOH oxygen-resisting layer, the second hot melt adhesive layer and the nylon layer from inside to outside, the EVOH oxygen-resisting layer is arranged in the middle, and the situation that the EVOH oxygen-resisting layer is in direct contact with the atmosphere to cause excessive moisture adsorption is avoided, so that the gas barrier performance of the 5 layers of oxygen-resisting pipes is greatly reduced; the outermost layer of the 5-layer oxygen barrier pipe is made of nylon, and the nylon material has higher tensile strength, better crack resistance and better wear resistance. The nylon material has higher tensile strength, better crack resistance and better wear resistance, is more suitable for being used as the outer layer of the oxygen-resistant pipe and provides better protection for pipelines; especially, under the condition that the ground heating coil needs to be buried in cement mortar, the outer nylon layer is used as a protective layer, and the service life of the pipeline is longer. The nylon material has certain termite and rat bite preventing characteristic and has excellent protection effect on the pipeline in use. The nylon has better temperature resistance and aging resistance, the maximum service temperature is 130 ℃, which is higher than 40 ℃ of HDPE and 95 ℃ of crosslinked polyethylene; when the pipeline is exposed to air for use, the nylon provides better durability and weather resistance; the low-temperature service performance of the nylon is better than that of polyolefin, and the lowest temperature can reach minus 40 ℃. The nylon has better oil resistance and chemical corrosion resistance. The thickness of the 5 layers of oxygen blocking pipes is 1.5-5.0 mm, although the price of nylon is higher than that of polyolefin materials, the thickness of the 5 layers of oxygen blocking pipes is thinner than that of the oxygen blocking pipes adopting polyolefin materials as outer walls, and therefore the cost of the oxygen blocking pipes is not obviously increased on the whole. Therefore, the 5-layer oxygen-blocking pipe improves the tolerance performance of the oxygen-blocking pipe while controlling the cost, thereby widening the application range. The whole wall thickness of the 5-layer oxygen-resisting pipe meets the strength and pressure-bearing capacity required by the national standard GB/T18992 or GB/T16834, and different wall thickness settings respectively correspond to different pressure-bearing grades such as S1, S2, S3, S4 and S5.
The above-mentioned 5 layers hinder oxygen pipe from interior to exterior is heat-resisting resin layer, first hot melt adhesive layer, EVOH hinder oxygen layer, second hot melt adhesive layer and nylon layer in proper order. On the whole, the 5-layer oxygen barrier pipe is a novel oxygen barrier pipe, and nylon is not applied to water heating type oxygen barrier pipes in the prior art. The form of hot melt adhesive, EVOH oxygen barrier layer and hot melt adhesive is maintained in the middle of the pipe wall of the 5-layer oxygen barrier pipe, and the barrier performance of the pipeline to specific substances such as oxygen is kept.
In an embodiment of the present invention, the thickness of the tube wall of the 5-layer oxygen blocking tube is 1.6-5 mm, and the outer diameter is 15-32 mm. In an embodiment of the utility model, the thickness on heat-resisting resin layer, first hot melt adhesive layer, EVOH hinder oxygen layer, second hot melt adhesive layer and nylon layer is 1.2 ~ 3.5mm, 0.075 ~ 0.15mm, 0.1 ~ 0.3mm, 0.075 ~ 0.15mm, 0.1 ~ 0.5mm in proper order.
In an embodiment of the present invention, the thickness of the heat-resistant resin layer, the first hot-melt adhesive layer, the EVOH oxygen barrier layer, the second hot-melt adhesive layer and the nylon layer is 1.5-3.5 mm, 0.1-0.15 mm, 0.1-0.3 mm, 0.1-0.15 mm, 0.3-0.5 mm in sequence.
In an embodiment of the present invention, the heat-resistant resin layer is made of at least one of cross-linked polyethylene, PERT, and polybutylene.
The inner layer (resin layer) of the pipe wall of the 5-layer oxygen-resisting pipe uses high-temperature-resistant materials such as cross-linked Polyethylene (PEX), PERT and Polybutylene (PB), and the basic properties of the pipeline for water heating and hot fluid conveying are maintained.
Crosslinked polyethylene: the polyethylene is crosslinked to form a net-shaped three-dimensional structure through covalent bonds between polyethylene molecules, so that the performance of the polyethylene resin is rapidly improved, such as: thermal deformation, wear resistance, chemical resistance, stress cracking resistance and other physical and chemical properties.
PERT: is a non-crosslinked heat-resistant polyethylene material. The PE-RT pipe is generally called as PE-RT ground heating pipe, and is a ground heating heat supply pipeline commonly used in the market. PE-RT is a kind of medium density polyethylene produced by special molecular design and synthesis process, and it adopts the method of ethylene and octene copolymerization, and obtains unique molecular structure by controlling the number and distribution of side chains to raise the heat resistance of PE pipe.
Polybutylene: PB is a high-molecular inert polymer, mainly polymerized by butylene. The polybutylene is mainly used for pipe wall materials of pipelines such as tap water pipes, hot water pipes, heating pipes and the like.
The reason why the inner layer of the tube wall of the novel oxygen-resisting tube does not use nylon is as follows: firstly, the nylon has high price and cost, and secondly, the nylon has no hydrolysis resistance when transporting hot water.
In an embodiment of the present invention, the EVOH oxygen barrier layer is made of EVOH (ethylene-vinyl alcohol copolymer).
Ethylene-vinyl alcohol copolymer (EVOH): by combining the processability of the ethylene polymer and the barrier effect of the vinyl alcohol polymer, the ethylene-vinyl alcohol copolymer not only exhibits excellent processability, but also exhibits excellent barrier effect against gases, odors, perfumes, solvents, and the like. Multilayer containers containing EVOH oxygen barrier layers are fully recyclable due to their thermal stability in combination with ethylene.
In an embodiment of the present invention, the nylon layer is made of at least one of nylon 11, nylon 12, nylon 6, and nylon 612.
Nylon 11(PA11) had a density of 1.04g/cm3The melting point is 185 ℃, the water absorption is 0.1-0.4%, the tensile strength is 47-58 MPa, and the composite material has the advantages of low water absorption, good oil resistance, low temperature resistance, easiness in processing and the like.
Nylon 12(PA12) is a linear, semi-crystalline thermoplastic material derived from butadiene. It has similar characteristics to nylon 11, but has a different crystal structure. The density is small, only 1.02g/cm3And is the smallest of the nylon series. The nylon 12 has the advantages of low water absorption, good dimensional stability, excellent low temperature resistance, easy processing and forming, excellent oil resistance, excellent wear resistance and the like.
Nylon 6(PA6) has a low melting point and a wide process temperature range. The nylon 6 has good impact resistance and dissolution resistance.
The nylon 612(PA612) component is polyhexamethylene dodecanedioyl diamine. The PA612 has the characteristics of common PA, and also has the advantages of small relative width, lower water absorption and density, good dimensional stability, and higher tensile strength and impact strength.
As mentioned above, the utility model discloses a novel 5 layers of hindering oxygen pipe for hot-water heating has following beneficial effect: the 5 layers of oxygen-resisting pipes are sequentially provided with the heat-resistant resin layer, the first hot melt adhesive layer, the EVOH oxygen-resisting layer, the second hot melt adhesive layer and the nylon layer from inside to outside, the EVOH oxygen-resisting layer is arranged in the middle, and the situation that the EVOH oxygen-resisting layer is in direct contact with the atmosphere to cause excessive moisture adsorption is avoided, so that the gas barrier performance of the 5 layers of oxygen-resisting pipes is greatly reduced; the outermost layer of the 5-layer oxygen barrier pipe is made of nylon, and the nylon material has higher tensile strength, better crack resistance and better wear resistance. The nylon material has higher tensile strength, better crack resistance and better wear resistance, is more suitable for being used as the outer layer of the oxygen-resistant pipe and provides better protection for pipelines; especially, under the condition that the ground heating coil needs to be buried in cement mortar, the outer nylon layer is used as a protective layer, and the service life of the pipeline is longer. The nylon material has certain termite and rat bite preventing characteristic and has excellent protection effect on the pipeline in use. The nylon has better temperature resistance and aging resistance, the maximum service temperature is 130 ℃, which is higher than 40 ℃ of HDPE and 95 ℃ of crosslinked polyethylene; when the pipeline is exposed to air for use, the nylon provides better durability and weather resistance; the low-temperature service performance of the nylon is better than that of polyolefin, and the lowest temperature can reach minus 40 ℃. The nylon has better oil resistance and chemical corrosion resistance. The thickness of the 5 layers of oxygen blocking pipes is 1.5-5.0 mm, although the price of nylon is higher than that of polyolefin materials, the thickness of the 5 layers of oxygen blocking pipes is thinner than that of the oxygen blocking pipes adopting polyolefin materials as outer walls, and therefore the cost of the oxygen blocking pipes is not obviously increased on the whole. Therefore, the 5-layer oxygen-blocking pipe improves the tolerance performance of the oxygen-blocking pipe while controlling the cost, thereby widening the application range. The whole wall thickness of the 5-layer oxygen-resisting pipe meets the strength and pressure-bearing capacity required by the national standard GB/T18992 or GB/T16834, and different wall thickness settings respectively correspond to different pressure-bearing grades such as S1, S2, S3, S4 and S5.
Drawings
Fig. 1 is a schematic view of a novel 5-layer oxygen-blocking pipe for water heating according to an embodiment of the present invention.
Description of the element reference numerals
1-a heat-resistant resin layer; 2-a first hot melt adhesive layer; 3-EVOH oxygen barrier layer; 4-a second hot melt adhesive layer; 5-nylon layer.
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to fig. 1. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Example 1
Referring to fig. 1, the utility model provides a novel 5-layer oxygen-blocking pipe for water heating, the 5-layer oxygen-blocking pipe comprises a heat-resistant resin layer 1, a first hot-melt adhesive layer 2, an EVOH oxygen-blocking layer 3, a second hot-melt adhesive layer 4 and a nylon layer 5 from inside to outside in sequence; the outer diameter of the 5-layer oxygen-blocking pipe is 20 mm;
the thicknesses of the heat-resistant resin layer 1, the first hot melt adhesive layer 2, the EVOH oxygen barrier layer 3, the second hot melt adhesive layer 4 and the nylon layer 5 are 2.5mm, 0.10mm, 0.15mm, 0.10mm and 0.3mm in sequence;
the material of the resin layer 1 is crosslinked polyethylene; the EVOH oxygen barrier layer 3 is made of EVOH; the nylon layer 5 is made of nylon 11.
Example 2
Referring to fig. 1, the utility model provides a novel 5-layer oxygen-blocking pipe for water heating, which comprises a resin layer 1, a first hot-melt adhesive layer 2, an EVOH oxygen-blocking layer 3, a second hot-melt adhesive layer 4 and a nylon layer 5 from inside to outside in sequence; the outer diameter of the oxygen-blocking pipe is 32 mm;
the thicknesses of the resin layer 1, the first hot melt adhesive layer 2, the EVOH oxygen barrier layer 3, the second hot melt adhesive layer 4 and the nylon layer 5 are 3.5mm, 0.15mm and 0.5mm in sequence;
the material of the resin layer 1 is PERT; the EVOH oxygen barrier layer 3 is made of ethylene-vinyl alcohol copolymer EVOH; the nylon layer 5 is made of nylon 12.
Example 3
Referring to fig. 1, the utility model provides a novel 5-layer oxygen-blocking pipe for water heating, the 5-layer oxygen-blocking pipe comprises a resin layer 1, a first hot melt adhesive layer 2, an EVOH oxygen-blocking layer 3, a second hot melt adhesive layer 4 and a nylon layer 5 from inside to outside in sequence; the outer diameter of the 5-layer oxygen-blocking pipe is 25 mm;
the thicknesses of the resin layer 1, the first hot melt adhesive layer 2, the EVOH oxygen barrier layer 3, the second hot melt adhesive layer 4 and the nylon layer 5 are sequentially 2.5mm, 0.1mm, 0.2-0.3 mm, 0.1-mm and 0.3 mm;
the material of the resin layer 1 is polybutylene; the EVOH oxygen barrier layer 3 is made of ethylene-vinyl alcohol copolymer EVOH; the nylon layer 5 is made of nylon 612.
To sum up, the 5-layer oxygen-resistant pipe of the utility model comprises a heat-resistant resin layer 1, a first hot-melt adhesive layer 2, an EVOH oxygen-resistant layer 3, a second hot-melt adhesive layer 4 and a nylon layer 5 from inside to outside in sequence, wherein the EVOH oxygen-resistant layer 3 is arranged in the middle part, so that the situation that the EVOH oxygen-resistant layer 3 is in direct contact with the atmosphere to cause excessive moisture adsorption is avoided, and the barrier property of the oxygen-resistant pipe to gas is greatly reduced; the outermost layer of the 5-layer oxygen barrier pipe is made of nylon, and the nylon material has higher tensile strength, better crack resistance, better wear resistance and functions of preventing rat bite and termite bite. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (5)
1. The novel 5-layer oxygen-blocking pipe for water heating is characterized in that the 5-layer oxygen-blocking pipe sequentially comprises a heat-resistant resin layer (1), a first hot-melt adhesive layer (2), an EVOH oxygen-blocking layer (3), a second hot-melt adhesive layer (4) and a nylon layer (5) from inside to outside; the thickness of the tube wall of the 5 layers of oxygen blocking tubes is 1.5-5.0 mm; the outer diameter of the 5 layers of oxygen blocking pipes is 10-32 mm.
2. The novel 5-layer oxygen-blocking pipe for water heating according to claim 1, wherein: the thickness of the tube wall of the 5 layers of oxygen blocking tubes is 1.6-5 mm, and the outer diameter is 15-32 mm.
3. The novel 5-layer oxygen-blocking pipe for water heating according to claim 1 or 2, wherein: the thickness of the heat-resistant resin layer (1), the first hot melt adhesive layer (2), the EVOH hinders oxygen layer (3), the second hot melt adhesive layer (4) and the nylon layer (5) is 1.2-3.5 mm, 0.075-0.15 mm, 0.1-0.3 mm, 0.075-0.15 mm and 0.1-0.5 mm in sequence.
4. The novel 5-layer oxygen-blocking pipe for water heating according to claim 1 or 2, wherein: the heat-resistant resin layer (1) is made of at least one of cross-linked polyethylene, PERT and polybutylene.
5. The novel 5-layer oxygen-blocking pipe for water heating according to claim 1 or 2, wherein: the nylon layer (5) is made of at least one of nylon 11, nylon 12, nylon 6 and nylon 612.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020411440.7U CN211875323U (en) | 2020-03-26 | 2020-03-26 | Novel 5-layer oxygen-blocking pipe for water heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020411440.7U CN211875323U (en) | 2020-03-26 | 2020-03-26 | Novel 5-layer oxygen-blocking pipe for water heating |
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| Publication Number | Publication Date |
|---|---|
| CN211875323U true CN211875323U (en) | 2020-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020411440.7U Expired - Fee Related CN211875323U (en) | 2020-03-26 | 2020-03-26 | Novel 5-layer oxygen-blocking pipe for water heating |
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| Country | Link |
|---|---|
| CN (1) | CN211875323U (en) |
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- 2020-03-26 CN CN202020411440.7U patent/CN211875323U/en not_active Expired - Fee Related
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