CN115286858A - High-thermal-conductivity heat-resistant polyethylene pipe and processing method thereof - Google Patents
High-thermal-conductivity heat-resistant polyethylene pipe and processing method thereof Download PDFInfo
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- CN115286858A CN115286858A CN202211013277.9A CN202211013277A CN115286858A CN 115286858 A CN115286858 A CN 115286858A CN 202211013277 A CN202211013277 A CN 202211013277A CN 115286858 A CN115286858 A CN 115286858A
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- 239000004698 Polyethylene Substances 0.000 title claims abstract description 53
- -1 polyethylene Polymers 0.000 title claims abstract description 53
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 53
- 238000003672 processing method Methods 0.000 title claims abstract description 9
- 239000000945 filler Substances 0.000 claims abstract description 79
- 238000012546 transfer Methods 0.000 claims abstract description 47
- 239000011159 matrix material Substances 0.000 claims abstract description 17
- 239000011231 conductive filler Substances 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 11
- 229910021389 graphene Inorganic materials 0.000 claims description 11
- 238000004513 sizing Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 25
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 10
- 210000001161 mammalian embryo Anatomy 0.000 description 8
- 230000007717 exclusion Effects 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 241000234295 Musa Species 0.000 description 2
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000007770 graphite material Substances 0.000 description 2
- 230000000877 morphologic effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004033 diameter control Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a high-thermal-conductivity heat-resistant polyethylene pipe and a processing method thereof, belonging to the technical field of heat-resistant polyethylene pipes. It has solved the poor technical problem of effect that current heat-resisting polyethylene pipe heat outwards transmits and disperses. The high-heat-conductivity heat-resistant polyethylene pipe comprises a heat-resistant polyethylene matrix, heat-conducting fillers and intermediate heat-transfer fillers, wherein the heat-conducting fillers are flaky, the intermediate heat-transfer fillers are granular, the intermediate heat-transfer fillers are filled among the flaky heat-conducting fillers, and the heat-conducting fillers at the periphery of the intermediate heat-transfer fillers are arranged in a mutually crossed manner. The high heat conduction heat-resistant polyethylene pipe can realize heat conduction orientation in the axial direction and the radial direction, and has a better heat dissipation effect.
Description
Technical Field
The invention belongs to the technical field of heat-resistant polyethylene pipes, and relates to a high-heat-conductivity heat-resistant polyethylene pipe and a processing method thereof.
Background
The low temperature floor radiant heating technology has been in use in the developed countries of western europe since the thirties of the last century. With the development of science and technology and plastic industry, the appearance of aluminum plastic pipes and various plastic pipes promotes the development of low-temperature floor radiant heating technology. The heat conductivity coefficient is an extremely important technical parameter of the ground heating pipe, and the higher heat conductivity coefficient can improve the heat exchange efficiency and reduce the energy consumption in use. In order to improve the thermal conductivity of the pipe, the mainstream method at present is to add graphene into a heat-resistant polyethylene (PE-RT) matrix.
The self-made banana peel graphene PE-RT super-heat-conduction antiscale floor heating pipe disclosed in the patent with the application publication number of CN112876763A comprises an outer heat conduction layer and an inner antiscale layer, wherein the outer heat conduction layer is prepared from the following raw materials in parts by mass: 100 parts of PE-RT resin and 10-25 parts of self-made banana peel graphene, wherein the inner scale prevention layer is prepared from the following raw materials in parts by mass: 100 parts of PE-RT resin, 1-2 parts of surface modified nano TiO2, 0.3-0.5 part of antibacterial agent and 1 part of color master.
As shown in fig. 1, the heat conduction efficiency of the conventional graphene PE-RT pipe can be greatly improved, but the heat conductive filler 2 in the heat-resistant polyethylene matrix 1 is only distributed along the axial direction, the distribution orientation along the radial direction is low, and the heat conduction effect is general when heat is transferred from inside to outside.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a high-heat-conductivity heat-resistant polyethylene pipe and a processing method thereof, and the technical problems to be solved by the invention are as follows: how to improve the heat conduction effect of the heat-resistant polyethylene pipe.
The purpose of the invention can be realized by the following technical scheme:
the high-heat-conductivity heat-resistant polyethylene pipe comprises a heat-resistant polyethylene matrix and heat-conducting fillers, wherein the heat-conducting fillers are flaky.
The heat-resistant polyethylene is a common base material of the floor heating pipe, and the heat-resistant polyethylene pipe modified by the flaky heat-conducting filler can be distributed along the axial direction, so that the heat-conducting efficiency is improved to a certain extent; the granular intermediate heat transfer filler which can generate a volume exclusion effect with the flaky heat conduction filler in the molten heat-resistant polyethylene base is added into the pipe, the volume exclusion effect means that due to the fact that real macromolecules occupy the volume, repulsive force can be generated between two polymer units which are relatively close to each other, the granular intermediate heat transfer filler is dispersed in the heat-resistant polyethylene base and can generate a more uniform volume exclusion effect on the flaky heat conduction filler on the periphery as the granular filler, so that the flaky heat conduction fillers are extruded in a smaller space between the granular heat conduction fillers, the probability of mutual contact is improved, the mutual cross arrangement is facilitated, a heat conduction network structure can be easily formed between the flaky heat conduction fillers, heat conduction orientation can be realized in the axial direction and the radial direction of the pipe, heat can be smoothly transferred from inside to outside, and the heat conduction effect is improved.
In the above high thermal conductivity heat resistant polyethylene pipe, the granular intermediate heat transfer filler can be simultaneously in contact with the heat conductive fillers arranged crosswise. The granular intermediate heat transfer filler is inserted among the flaky heat conduction fillers, so that gaps among the flaky heat conduction fillers can be filled, the density of a heat conduction network is increased, a hybrid structure similar to a bridge can be formed, the orientation of the pipe diameter direction is enhanced, the heat conduction efficiency is improved, and the energy consumption is reduced.
In the high heat conductivity and heat resistance polyethylene pipe, the intermediate heat transfer filler is graphite particles or alumina particles. The graphite material or the alumina has high heat conduction efficiency and stable chemical property, and is beneficial to realizing the high-efficiency transfer of heat through a hybrid morphological structure.
In the high-thermal-conductivity heat-resistant polyethylene pipe, the thermal conductive filler is a flaky graphene filler. The graphene has excellent heat-conducting property, and the flaky graphene filler can ensure that the heat transfer effect is more excellent.
In the above high thermal conductivity heat resistant polyethylene pipe, the intermediate heat transfer filler and the thermal conductive filler are uniformly distributed in the heat resistant polyethylene base. Therefore, the circumferential heat conduction effect of the pipe is uniform and stable, and the heating effect and experience are ensured.
The processing method of the high-thermal-conductivity heat-resistant polyethylene pipe is characterized by comprising the following steps of:
a. mixing the heat-resistant polyethylene matrix, the heat-conducting filler and the intermediate heat-conducting filler in an extruder to form a molten composite material;
b. the molten composite material is shunted through a spiral flow channel of an extruder and flows through a channel between a horn-shaped neck mold and a cone core rod to be compressed into a blank tube with small outer diameter for extrusion;
c. the blank pipe passes through a neck mold provided with a stretching core rod with the diameter gradually increased, the stretching core rod enables the outer diameter of the blank pipe to be increased to the outer diameter size of the standard pipe, and meanwhile, the thickness of the blank pipe is reduced to realize bidirectional stretching;
d. enabling the billet tube to slide along the surface of the stretching core rod by a tractor and then enter a water ring sizing sleeve, wherein the water ring sizing sleeve is positioned in a vacuum box to enable the billet tube to form primary sizing;
e. and (4) the preliminarily shaped blank pipe enters a spraying box to finish final cooling and shaping.
In the molten composite material, the granular intermediate heat-transfer filler forms a volume exclusion effect between the heat-resistant polyethylene matrix and the flaky heat-transfer filler, so that the heat-transfer fillers at the flaky periphery of the intermediate heat-transfer filler are in cross contact with each other, then the composite material is compressed through a first opening die to form an embryo tube with a small outer diameter, the embryo tube is axially stretched under the action of a tractor, part of the heat-transfer fillers are axially deflected, the outer diameter is expanded and the thickness is reduced through a second opening die, part of the heat-transfer fillers can be inclined and deflected towards the tube diameter of the embryo body, namely, the embryo tube is axially and radially stretched bidirectionally, and further the heat-transfer fillers in the embryo tube can be deflected in multiple directions in the stretching deformation process, so that the situation that the heat-transfer fillers are only distributed towards the axial direction of the embryo tube is avoided, the anisotropy of the composite material can be eliminated, and the heat-transfer effect is improved.
In the processing method of the high heat conductivity and heat resistance polyethylene pipe, the outer diameter of the extruded blank pipe in the step b is 50% of the outer diameter of the standard pipe. Therefore, the size change of the embryo tube can be controlled within a reasonable range when the embryo tube is stretched in two directions, and the better elimination effect of the anisotropy can be ensured.
Compared with the prior art, the invention has the following advantages:
the high-heat-conductivity heat-resistant polyethylene pipe enables the granular intermediate heat-transfer filler to be dispersed in the pipe matrix, the intermediate heat-transfer filler serving as inert particles can generate a volume removal effect on the flaky heat-transfer filler, the angles of the flaky heat-transfer filler on the periphery of the granular intermediate heat-transfer filler are mutually crossed, the probability of mutual contact between the flaky heat-transfer fillers is increased, a heat-conducting network structure can be formed between the flaky heat-transfer fillers more easily, heat-conducting orientation can be realized in the axial direction and the radial direction of the pipe, heat can be smoothly transferred from inside to outside, and the heat-conducting and heating effect is improved.
Drawings
Fig. 1 is a sectional view of a conventional high thermal conductivity heat resistant polyethylene pipe and a partially enlarged view of the pipe wall.
Fig. 2 is a sectional view of the high thermal conductivity and heat resistant polyethylene pipe in this embodiment and a partially enlarged view of the pipe wall.
In the figure, 1, a heat-resistant polyethylene matrix; 2. a thermally conductive filler; 3. an intermediate heat transfer filler.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
The first embodiment is as follows:
as shown in fig. 2, the high thermal conductivity and heat resistance polyethylene pipe comprises a heat resistance polyethylene matrix 1 and a flaky thermal conductive filler 2, and further comprises a granular intermediate thermal conductive filler 3, wherein the intermediate thermal conductive filler 3 can generate a volume exclusion effect with the peripheral flaky thermal conductive filler 2 when the heat resistance polyethylene matrix 1 is molten, so that the flaky thermal conductive fillers 2 are arranged in a mutually crossed manner. The heat-resistant polyethylene is a common base material of the floor heating pipe, and the heat-resistant polyethylene pipe modified by the flaky heat-conducting filler 2 can be distributed along the axial direction, so that the heat-conducting efficiency is improved to a certain extent; the granular intermediate heat transfer filler 3 which can generate a volume exclusion effect with the flaky heat conduction filler 2 is added into the components of the pipe, the intermediate heat transfer filler 33 is dispersed in the matrix, the intermediate heat transfer filler 3 generates the volume exclusion effect on the flaky heat conduction filler 2, and the angles of the flaky heat conduction fillers 2 at the periphery of the intermediate heat transfer filler 3 are mutually crossed, so that the probability of mutual contact between the flaky heat conduction fillers 2 is increased, a heat conduction network structure can be formed between the flaky heat conduction fillers 2 more easily, further, the heat conduction orientation can be realized in the axial direction and the radial direction of the pipe, the heat can be smoothly transferred from inside to outside, and the heat conduction and heating effect is improved. Specifically, the intermediate heat transfer filler 3 can be filled between the two sheets of the heat conductive filler 2 while being in contact with the two sheets of the heat conductive filler 2. The granular heat-conducting filler is inserted between the flaky heat-conducting fillers 2, so that gaps among the flaky heat-conducting fillers 2 can be filled, the density of a heat-conducting network is increased, a hybrid structure similar to a bridge can be formed, the orientation in the pipe diameter direction is enhanced, the heat-conducting efficiency is improved, and the energy consumption is reduced. Preferably, the intermediate heat transfer filler 3 is a particulate graphite filler. The graphite material has high heat conduction efficiency, is inert particles, can avoid chemical reaction with peripheral materials, and is beneficial to realizing high-efficiency heat transfer through a hybrid morphological structure. The flaky heat conducting filler 2 is flaky graphene filler. The graphene has excellent heat-conducting property, and the flaky graphene filler can ensure that the heat transfer effect is more excellent. The intermediate heat transfer filler 3 and the flaky heat conduction filler 2 are uniformly distributed or approximately uniformly distributed in the pipe. Therefore, the circumferential heat conduction effect of the pipe is uniform and stable, and the heating effect and experience are ensured.
Example two:
the processing method of the high-heat-conductivity heat-resistant polyethylene pipe comprises the following steps:
a. extruding the composite material of the heat-resistant polyethylene matrix 1, the granular intermediate heat-transfer filler 3 and the flaky heat-conduction filler 2 by an extruder;
b. the molten composite material is shunted through a spiral flow channel of an extruder and flows through a channel between a horn-shaped neck mold and a cone core rod to be compressed into a blank tube with the external diameter size of 50 percent of that of a standard tube and extruded;
c. the blank tube passes through a neck ring die provided with a stretching core rod with the diameter gradually increased, the stretching core rod enables the outer diameter of the blank tube to be increased to the outer diameter size of the standard tube, and meanwhile, the thickness of the blank tube is reduced to realize bidirectional stretching;
d. enabling the blank tube to slide along the surface of the stretching core rod by a tractor and then enter a water ring sizing sleeve, wherein the water ring sizing sleeve is positioned in a vacuum box to enable the blank tube to form primary sizing;
e. and (5) the preliminarily shaped blank pipe enters a spraying box to finish final cooling and shaping.
The molten composite material is compressed by a first neck mold of an extruder to form a blank pipe with a small outer diameter, and then is subjected to bidirectional stretching by a second neck mold to realize outer diameter expansion and thickness reduction, so that the anisotropy of the composite material can be eliminated, and the heat conduction effect is improved. The outer diameter control is half of the outer diameter of the standard pipe when the blank pipe is preliminarily compressed, so that the size change can be controlled within a reasonable range when the blank pipe is subjected to biaxial tension, and the better removal effect of anisotropy can be ensured. The couplant is added during melting, the affinity of the granular heat-conducting filler 3 and the heat-resistant polyethylene matrix 1 is improved, and the extruder, the tractor, the water ring sizing sleeve, the vacuum box, the spraying box and the like in the embodiment are all existing equipment.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (7)
1. The high-heat-conductivity heat-resistant polyethylene pipe comprises a heat-resistant polyethylene matrix (1) and heat-conductive fillers (2) distributed in the heat-resistant polyethylene matrix (1), wherein the heat-conductive fillers (2) are flaky, and the high-heat-conductivity heat-resistant polyethylene pipe is characterized by further comprising intermediate heat-transfer fillers (3), wherein the intermediate heat-transfer fillers (3) are granular, the intermediate heat-transfer fillers (3) are filled among the flaky heat-conductive fillers (2), and the heat-conductive fillers (2) on the periphery of the intermediate heat-transfer fillers (3) are arranged in a mutually crossed manner.
2. The high thermal conductivity heat resistant polyethylene pipe according to claim 1, wherein the intermediate heat transfer filler (3) can be simultaneously contacted with the heat conductive fillers (2) arranged crosswise.
3. The high thermal conductivity and heat resistance polyethylene pipe according to claim 1 or 2, wherein the intermediate heat transfer filler (3) is graphite particles or alumina particles.
4. The high thermal conductivity heat resistant polyethylene pipe according to claim 1 or 2, wherein the thermal conductive filler (2) is a graphene flake filler.
5. The high thermal conductivity and heat resistance polyethylene pipe according to claim 1 or 2, wherein the intermediate heat transfer filler (3) and the thermal conductive filler (2) are uniformly distributed in the heat resistance polyethylene matrix (1).
6. The processing method of the high-thermal-conductivity heat-resistant polyethylene pipe is characterized by comprising the following steps of:
a. the heat-resistant polyethylene matrix (1), the intermediate heat transfer filler (3) and the heat-conducting filler (2) are mixed in an extruder to form a molten composite material;
b. the molten composite material is shunted through a spiral flow channel of an extruder and flows through a channel between a horn-shaped neck mold and a cone core rod to be compressed into a blank tube with small outer diameter for extrusion;
c. the blank tube passes through a neck ring die provided with a stretching core rod with the diameter gradually increased, the stretching core rod enables the outer diameter of the blank tube to be increased to the outer diameter size of the standard tube, and meanwhile, the thickness of the blank tube is reduced to realize bidirectional stretching;
d. enabling the billet tube to slide along the surface of the stretching core rod by a tractor and then enter a water ring sizing sleeve, wherein the water ring sizing sleeve is positioned in a vacuum box to enable the billet tube to form primary sizing;
e. and (4) the preliminarily shaped blank pipe enters a spraying box to finish final cooling and shaping.
7. The method for processing the high thermal conductivity and heat resistant polyethylene pipe as claimed in claim 6, wherein the external diameter of the extruded green pipe in step b is 50% of the external diameter of the standard pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211013277.9A CN115286858A (en) | 2022-08-23 | 2022-08-23 | High-thermal-conductivity heat-resistant polyethylene pipe and processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211013277.9A CN115286858A (en) | 2022-08-23 | 2022-08-23 | High-thermal-conductivity heat-resistant polyethylene pipe and processing method thereof |
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| CN115286858A true CN115286858A (en) | 2022-11-04 |
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| CN202211013277.9A Pending CN115286858A (en) | 2022-08-23 | 2022-08-23 | High-thermal-conductivity heat-resistant polyethylene pipe and processing method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202114906U (en) * | 2011-06-08 | 2012-01-18 | 新疆天业（集团）有限公司 | Bidirectional tube drawing head |
| CN102408610A (en) * | 2011-11-14 | 2012-04-11 | 联塑市政管道（河北）有限公司 | Functional polyethylene pipe and preparation method thereof |
| CN111378226A (en) * | 2020-03-09 | 2020-07-07 | 泰烯新材料科技(浙江)有限公司 | High-thermal-conductivity graphene composite material and preparation method thereof |
| WO2020229962A1 (en) * | 2019-05-15 | 2020-11-19 | 3M Innovative Properties Company | (co)polymer matrix composites comprising thermally-conductive particles and a nonvolatile diluent and methods of making the same |
| US20200385624A1 (en) * | 2019-06-07 | 2020-12-10 | Eaton Intelligent Power Limited | Thermally conductive polymers |
-
2022
- 2022-08-23 CN CN202211013277.9A patent/CN115286858A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202114906U (en) * | 2011-06-08 | 2012-01-18 | 新疆天业（集团）有限公司 | Bidirectional tube drawing head |
| CN102408610A (en) * | 2011-11-14 | 2012-04-11 | 联塑市政管道（河北）有限公司 | Functional polyethylene pipe and preparation method thereof |
| WO2020229962A1 (en) * | 2019-05-15 | 2020-11-19 | 3M Innovative Properties Company | (co)polymer matrix composites comprising thermally-conductive particles and a nonvolatile diluent and methods of making the same |
| US20200385624A1 (en) * | 2019-06-07 | 2020-12-10 | Eaton Intelligent Power Limited | Thermally conductive polymers |
| CN111378226A (en) * | 2020-03-09 | 2020-07-07 | 泰烯新材料科技(浙江)有限公司 | High-thermal-conductivity graphene composite material and preparation method thereof |
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