CN115418040A - HDPE double-wall corrugated pipe and production process thereof - Google Patents
HDPE double-wall corrugated pipe and production process thereof Download PDFInfo
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- 229920001903 high density polyethylene Polymers 0.000 title claims abstract description 33
- 239000004700 high-density polyethylene Substances 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 37
- 239000011256 inorganic filler Substances 0.000 claims abstract description 22
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 22
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 17
- 239000000835 fiber Substances 0.000 claims abstract description 17
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 17
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 229920002545 silicone oil Polymers 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims abstract description 11
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 11
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 11
- 239000002667 nucleating agent Substances 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims description 17
- 239000004595 color masterbatch Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 abstract description 12
- 239000004698 Polyethylene Substances 0.000 abstract description 10
- -1 polyethylene Polymers 0.000 abstract description 9
- 229920000573 polyethylene Polymers 0.000 abstract description 9
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 238000010008 shearing Methods 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 4
- 239000002105 nanoparticle Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
-
- 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
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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Abstract
The invention relates to the technical field of double-wall corrugated pipes, and discloses an HDPE double-wall corrugated pipe and a production process thereof, wherein the HDPE double-wall corrugated pipe comprises the following raw materials in parts by weight: 25-40 parts of TR571 types, 30-60 parts of 5301 types, 50-80 parts of outer wall master batch, 50-80 parts of inner wall master batch, 6-18 parts of amino modified silicone oil, 10-14 parts of polyvinyl alcohol fiber, 1-8 parts of water absorption master batch, 1-3 parts of master batch, 30-50 parts of inorganic filler, 2-4 parts of nano zirconia, 0.5-0.9 part of nucleating agent, 0.8-1.2 parts of silane coupling agent and 1-3 parts of antioxidant. According to the HDPE double-wall corrugated pipe and the production process thereof, the polyvinyl alcohol fiber is added to form a layered structure in the product, so that the anti-cracking performance of the product is favorably improved, the amino modified silicone oil is added, and the amino modified silicone oil and the polyvinyl alcohol fiber are together favorable for improving the compatibility among the polyethylene powder, the inorganic filler powder and the nano zirconia, so that the strength and the hardness of the product are favorably improved, the mechanical performance of the product is favorably improved, and the service life of the product is favorably prolonged.
Description
Technical Field
The invention relates to the technical field of double-wall corrugated pipes, in particular to an HDPE double-wall corrugated pipe and a production process thereof.
Background
A high-density polyethylene (HDPE) double-wall corrugated pipe, referred to as PE corrugated pipe for short, is a novel plastic pipe which is made of HDPE resin as a main raw material by an extrusion molding process, has a smooth and flat inner wall, a trapezoidal (square wave) or arc (circular wave) corrugated outer wall and a hollow space between the inner wall and the outer wall, belongs to a polyolefin structural wall pipe and is mainly used in the field of buried pollution discharge.
The wave crest of the existing corrugated pipe can not be formed when the corrugated pipe is just started, and the problems that the required vacuum degree (more than or equal to 0.06 Mpa) can not be achieved along with the vacuum of the outer layer at the moment are usually solved, and the outer wall of the corrugated pipe has small holes, the pipe is bent, the thickness of the wave crest in the axial direction is inconsistent, the weight of the pipe is unstable, the pipe is large in brittleness after being cooled, the ring stiffness is low and the like are solved.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an HDPE double-wall corrugated pipe and a production process thereof, and the HDPE double-wall corrugated pipe has the advantages of strong external pressure resistance, low engineering cost, convenient construction, small friction coefficient, large flow, good low temperature resistance, impact resistance, long service life, excellent wear resistance, proper flexibility and the like, and solves the problems that the wave crest of the corrugated pipe cannot be formed when the corrugated pipe is just started, the required vacuum degree cannot be achieved along with the vacuum of an outer layer at the moment, in addition, the outer wall of the corrugated pipe has small holes, the pipe is bent, the thickness of the wave crest in the axial direction is inconsistent, the weight of the pipe is unstable, the pipe is large in brittleness after being cooled, and the ring stiffness is not high.
(II) technical scheme
In order to realize the purposes of strong external pressure resistance, low construction cost, convenient construction, small friction coefficient, large flow, good low temperature resistance, impact resistance, long service life, excellent wear resistance and proper flexibility, the invention provides the following technical scheme: an HDPE double-wall corrugated pipe and a production process thereof are as follows: the material comprises the following raw materials in parts by weight: 25-40 parts of TR571 types, 30-60 parts of 5301 types, 50-80 parts of outer wall master batch, 50-80 parts of inner wall master batch, 6-18 parts of amino modified silicone oil, 10-14 parts of polyvinyl alcohol fiber, 1-8 parts of water absorption master batch, 1-3 parts of master batch, 30-50 parts of inorganic filler, 2-4 parts of nano zirconia, 0.5-0.9 part of nucleating agent, 0.8-1.2 parts of silane coupling agent and 1-3 parts of antioxidant.
Preferably, the formula of the middle wall and the outer wall of the double-wall corrugated pipe comprises the following raw materials in parts by weight: 30 parts of TR571 type, 25 parts of 5301 type, 45 parts of outer wall master batch, 10 parts of amino modified silicone oil, 2 parts of water absorption master batch, 2.5 parts of color master batch, 30 parts of inorganic filler, 2 parts of nano zirconia, 0.5 part of nucleating agent, 0.8-1.2 parts of silane coupling agent and 1-3 parts of antioxidant.
Preferably, the formula of the inner wall of the double-wall corrugated pipe comprises the following raw materials in parts by weight: 5301 55 parts of type, 45 parts of inner wall master batch, 10 parts of polyvinyl alcohol fiber, 1.5 parts of color master batch, 30 parts of inorganic filler, 2 parts of nano zirconia, 0.5 part of nucleating agent, 0.8-1.2 parts of silane coupling agent and 1-3 parts of antioxidant.
An HDPE double-wall corrugated pipe and a production process thereof are characterized in that: the method comprises the following steps:
s1, weighing the raw materials in a weight ratio;
s2, adding TR571 types, 5301 types, outer wall master batch, water absorption master batch, amino modified silicone oil, color master batch and nano zirconia into a reaction kettle, mixing for 40-60 minutes, controlling the temperature below 230 ℃, and stirring for 10 minutes at the rotating speed of 1200r/min to obtain the outer wall of the corrugated pipe;
s3, adding 5301 type, the inner wall master batch, the color master batch, the polyvinyl alcohol fiber, the inorganic filler and the polyethylene glycol terephthalate into a reaction kettle, mixing for 40-60 minutes, controlling the temperature below 230 ℃, and stirring for 10 minutes at the rotation speed of 1200r/min to obtain the inner wall of the corrugated pipe;
and S4, adding the outer wall of the corrugated pipe and the inner wall of the corrugated pipe into an extruder for extrusion, then processing the corrugated pipe by a corrugated pipe forming machine to obtain a formed corrugated pipe, cooling the formed corrugated pipe by a spray water tank, spraying marks on the formed corrugated pipe by an ink-jet printer, and cutting the corrugated pipe into a plurality of HDPE double-wall corrugated pipes.
(III) advantageous effects
Compared with the prior art, the invention provides the HDPE double-wall corrugated pipe and the production process thereof, and the HDPE double-wall corrugated pipe has the following beneficial effects:
1. according to the HDPE double-wall corrugated pipe and the production process thereof, the inorganic filler is added into polyethylene to manufacture the corrugated pipe, so that the strength of the product is improved; the nano zirconia is added, the nano zirconia contains a large amount of nano particles, and the nano particles are uniformly dispersed in the polyethylene powder, so that the hardness of the product is improved; the polyvinyl alcohol fiber is added to form a layered structure in the product, which is beneficial to improving the crack resistance of the product, the amino modified silicone oil is added, and the amino modified silicone oil and the polyvinyl alcohol fiber are beneficial to improving the compatibility among the polyethylene powder, the inorganic filler powder and the nano-zirconia, and is beneficial to uniformly dispersing the inorganic filler powder and the nano-zirconia in the polyethylene powder, so that the strength and the hardness of the product are better improved, the mechanical property of the product is improved, and the service life of the product is prolonged.
2. According to the HDPE double-wall corrugated pipe and the production process thereof, the rotating speed of the screw is one of very important process parameters in the extrusion molding process, the rotating speed is increased, the yield is increased, the shearing rate is increased, the viscosity of materials is reduced, and the plasticization of the materials is facilitated, but the plasticization capacity and the melt pressure range of the extruder need to be considered when the rotating speed is increased, otherwise the materials are pressed into a machine head without being completely plasticized due to excessively high material flow speed, and the product quality is seriously affected, so that the rotating speed of the screw is usually adjusted to be low when the machine is started, the rotating speed is slowly increased after the production is stable, and the current of the extruder, the melt pressure change and the product quality are closely observed.
3. The HDPE double-wall corrugated pipe and the production process thereof determine the extrusion capacity of an extruder to a great extent through the rotating speed of the screw, but the excessively high rotating speed can cause a barrel part to generate a large amount of shearing heat energy, the material performance is greatly damaged at the same temperature, the service life of the screw can be finished in advance through long-time high-speed operation, and the rotating speed of the screw is preferably controlled to be 75% -85% of the maximum rotating speed. In the normal production process, the highest solid conveying capacity is achieved by using the lower screw rotating speed as far as possible, so that on one hand, the materials can be prevented from thermal degradation under the action of larger shearing force, and on the other hand, the quality of products and the extrusion efficiency can be improved.
4. The HDPE double-wall corrugated pipe and the production process thereof have the advantages that the structure of the double-wall corrugated pipe extrusion die is complex, and the HDPE double-wall corrugated pipe is mainly characterized in that an inner runner and an outer runner are divided in the same die, compressed air is introduced between interlayers of the inner runner and the outer runner to help the outer layer to form corrugations on a forming module, meanwhile, a cooling water pipe of a sizing sleeve also passes through a core rod, and in order to compensate heat loss caused by the passing of cooling water, the inner wall of a machine head is generally required to be heated. When producing large-caliber pipes, because the polyolefin pipes generally adopt a single-screw extruder and the extrusion capacity is much smaller than that of a double-screw extruder, the double-layer co-extrusion technology of two extruders is generally adopted, so that the production can be ensured and the yield can be improved.
Drawings
FIG. 1 is a schematic view of a HDPE double-wall corrugated pipe and a production process thereof according to the present invention;
FIG. 2 is a schematic diagram of a HDPE double-wall corrugated pipe extruder mold structure according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the formula of the middle and outer walls of the double-wall corrugated pipe comprises the following raw materials in parts by weight: 30 parts of TR571 types, 25 parts of 5301 types, 45 parts of outer wall master batch, 10 parts of amino modified silicone oil, 2 parts of water absorption master batch, 2.5 parts of color master batch, 30 parts of inorganic filler, 2 parts of nano zirconia, 0.5 part of nucleating agent, 0.8 part of silane coupling agent and 1 part of antioxidant;
the formula of the inner wall of the double-wall corrugated pipe comprises the following raw materials in parts by weight: 5301 parts of type 55 parts, 45 parts of inner wall master batch, 10 parts of polyvinyl alcohol fiber, 1.5 parts of color master batch, 30 parts of inorganic filler, 2 parts of nano zirconia, 0.5 part of nucleating agent, 0.8 part of silane coupling agent and 1 part of antioxidant.
An HDPE double-wall corrugated pipe and a production process thereof comprise the following steps:
s1, weighing the raw materials in a weight ratio;
s2, adding TR571 types, 5301 types, outer wall master batch, water absorption master batch, amino modified silicone oil, color master batch and nano zirconia into a reaction kettle, mixing for 40 minutes, controlling the temperature at 80 ℃, and stirring for 10 minutes at the rotating speed of 1200r/min to obtain the outer wall of the corrugated pipe;
s3, adding 5301 type, inner wall master batch, color master batch, polyvinyl alcohol fiber, inorganic filler and polyethylene glycol terephthalate into a reaction kettle, mixing for 40 minutes, controlling the temperature at 80 ℃, and stirring for 10 minutes at the rotating speed of 1200r/min to obtain the inner wall of the corrugated pipe;
and S4, adding the outer wall of the corrugated pipe and the inner wall of the corrugated pipe into an extruder for extrusion, then processing the corrugated pipe by a corrugated pipe forming machine to obtain a formed corrugated pipe, cooling the formed corrugated pipe by a spray water tank, spraying marks on the formed corrugated pipe by an ink-jet printer, and cutting the corrugated pipe into a plurality of HDPE double-wall corrugated pipes.
Example two
An HDPE double-wall corrugated pipe and a production process thereof, wherein the formula of the middle and outer walls of the double-wall corrugated pipe comprises the following raw materials in parts by weight: 35 parts of TR571 types, 30 parts of 5301 types, 35 parts of outer wall master batch, 4 parts of water absorption master batch, 15 parts of amino modified silicone oil, 2.5 parts of master batch, 40 parts of inorganic filler, 2 parts of nano zirconia, 0.5 part of nucleating agent, 0.8-1.2 parts of silane coupling agent and 1-3 parts of antioxidant;
the formula of the inner wall of the double-wall corrugated pipe comprises the following raw materials in parts by weight: 5301 55 parts of type, 45 parts of inner wall master batch, 12 parts of polyvinyl alcohol fiber, 1.5 parts of color master batch, 30 parts of inorganic filler, 3 parts of nano zirconia, 0.7 part of nucleating agent, 1 part of silane coupling agent and 2 parts of antioxidant.
An HDPE double-wall corrugated pipe and a production process thereof comprise the following steps:
s1, weighing the raw materials according to the weight ratio;
s2, adding TR571 types, 5301 types, outer wall master batch, water absorption master batch, amino modified silicone oil, color master batch and nano zirconia into a reaction kettle, mixing for 50 minutes, controlling the temperature at 100 ℃, and stirring for 10 minutes at the rotating speed of 1200r/min to obtain the outer wall of the corrugated pipe;
s3, adding 5301 type, inner wall master batch, color master batch, polyvinyl alcohol fiber, inorganic filler and polyethylene glycol terephthalate into a reaction kettle, mixing for 50 minutes, controlling the temperature at 100 ℃, and stirring for 10 minutes at the rotating speed of 1200r/min to obtain the inner wall of the corrugated pipe;
and S4, adding the outer wall of the corrugated pipe and the inner wall of the corrugated pipe into an extruder for extrusion, then processing the corrugated pipe by a corrugated pipe forming machine to obtain a formed corrugated pipe, cooling the formed corrugated pipe by a spray water tank, spraying marks on the formed corrugated pipe by an ink-jet printer, and cutting the corrugated pipe into a plurality of HDPE double-wall corrugated pipes. The raw material utilization requirements are shown in the following chart:
inorganic filler is added into polyethylene to manufacture the corrugated pipe, which is beneficial to improving the strength of the product; the nano zirconia is added, the nano zirconia contains a large number of nano particles, and the nano particles are uniformly dispersed in the polyethylene powder, so that the hardness of the product is improved; the polyvinyl alcohol fiber is added to form a layered structure in the product, which is beneficial to improving the crack resistance of the product, the amino modified silicone oil is added, and the amino modified silicone oil and the polyvinyl alcohol fiber are beneficial to improving the compatibility among the polyethylene powder, the inorganic filler powder and the nano-zirconia, and is beneficial to uniformly dispersing the inorganic filler powder and the nano-zirconia in the polyethylene powder, so that the strength and the hardness of the product are better improved, the mechanical property of the product is improved, and the service life of the product is prolonged.
The rotation speed of the screw is one of very important process parameters in the extrusion molding process, the rotation speed is increased, the yield is increased, the shearing rate is increased, the viscosity of the material is reduced, and the plasticization of the material is facilitated, but the plasticizing capacity and the melt pressure range of the extruder are also considered for the increase of the rotation speed, otherwise, the material is pressed into a machine head without being completely plasticized due to excessively high flow speed of the material, and the product quality is seriously influenced.
The extrusion capacity of the extruder is determined to a great extent by the rotation speed of the screw, but too high rotation speed can cause a large amount of shearing heat energy to be generated in a cylinder part, the performance of the material is greatly damaged at the same temperature, the service life of the screw is also finished in advance by long-time high-speed operation, and the rotation speed of the screw is controlled to be 75% -85% of the maximum rotation speed. In the normal production process, the highest solid conveying capacity is achieved by using the lower screw rotating speed as far as possible, so that on one hand, the materials can be prevented from thermal degradation under the action of larger shearing force, and on the other hand, the quality of products and the extrusion efficiency can be improved.
The double-wall corrugated pipe extrusion die is characterized in that an inner flow channel and an outer flow channel are divided in the same die, compressed air is introduced between interlayer layers of the inner flow channel and the outer flow channel to help the outer layer to form corrugations on a forming module, meanwhile, a cooling water pipe of a sizing sleeve also passes through a core rod, and the inner wall of a machine head is generally heated in order to compensate heat loss caused by the passing of cooling water. When producing large-caliber pipes, because the polyolefin pipes generally adopt a single-screw extruder and the extrusion capacity is much smaller than that of a double-screw extruder, the double-layer co-extrusion technology of two extruders is generally adopted, so that the production can be ensured and the yield can be improved.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. An HDPE double-wall corrugated pipe and a production process thereof are characterized in that: the material comprises the following raw materials in parts by weight: 25-40 parts of TR571 types, 30-60 parts of 5301 types, 50-80 parts of outer wall master batch, 50-80 parts of inner wall master batch, 6-18 parts of amino modified silicone oil, 10-14 parts of polyvinyl alcohol fiber, 1-8 parts of water absorption master batch, 1-3 parts of master batch, 30-50 parts of inorganic filler, 2-4 parts of nano zirconia, 0.5-0.9 part of nucleating agent, 0.8-1.2 parts of silane coupling agent and 1-3 parts of antioxidant.
2. HDPE double-wall corrugated pipe and the production process thereof according to claim 1, characterized in that: the formula of the middle and outer walls of the double-wall corrugated pipe comprises the following raw materials in parts by weight: 30 parts of TR571 types, 25 parts of 5301 types, 45 parts of outer wall master batch, 10 parts of amino modified silicone oil, 2 parts of water absorption master batch, 2.5 parts of color master batch, 30 parts of inorganic filler, 2 parts of nano zirconia, 0.5 part of nucleating agent, 0.8-1.2 parts of silane coupling agent and 1-3 parts of antioxidant.
3. HDPE double-wall corrugated pipe and the production process thereof according to claim 1, characterized in that: the formula of the inner wall of the double-wall corrugated pipe comprises the following raw materials in parts by weight: 5301 55 parts of type, 45 parts of inner wall master batch, 10 parts of polyvinyl alcohol fiber, 1.5 parts of color master batch, 30 parts of inorganic filler, 2 parts of nano zirconia, 0.5 part of nucleating agent, 0.8-1.2 parts of silane coupling agent and 1-3 parts of antioxidant.
4. HDPE double-wall corrugated pipe and the production process thereof according to claim 1, characterized in that: the method comprises the following steps:
s1, weighing the raw materials according to the weight ratio;
s2, adding TR571 types, 5301 types, outer wall master batch, water absorption master batch, amino modified silicone oil, color master batch and nano zirconia into a reaction kettle, mixing for 40-60 minutes, controlling the temperature below 230 ℃, and stirring for 10 minutes at the rotating speed of 1200r/min to obtain the outer wall of the corrugated pipe;
s3, adding 5301 type, inner wall master batch, color master batch, polyvinyl alcohol fiber, inorganic filler and polyethylene glycol terephthalate into a reaction kettle, mixing for 40-60 minutes, controlling the temperature below 230 ℃, and stirring for 10 minutes at the rotating speed of 1200r/min to obtain the inner wall of the corrugated pipe;
and S4, adding the outer wall of the corrugated pipe and the inner wall of the corrugated pipe into an extruder for extrusion, then processing the corrugated pipe by a corrugated pipe forming machine to obtain a formed corrugated pipe, cooling the formed corrugated pipe by a spray water tank, spraying marks on the formed corrugated pipe by an ink-jet printer, and cutting the corrugated pipe into a plurality of HDPE double-wall corrugated pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210913858.1A CN115418040A (en) | 2022-08-01 | 2022-08-01 | HDPE double-wall corrugated pipe and production process thereof |
Applications Claiming Priority (1)
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| CN103360659A (en) * | 2012-04-03 | 2013-10-23 | 李胜春 | High-performance high-density polyethylene (HDPE) pipe fitting |
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| CN104989890A (en) * | 2015-07-17 | 2015-10-21 | 四川省川杭塑胶科技有限公司 | Underground double-layer reinforced and modified polyolefin (DRPO) corrugated pipe for water draining and sewage discharging |
| CN109838628A (en) * | 2019-03-15 | 2019-06-04 | 惠升管业有限公司 | A kind of winter double-wall corrugated pipe and preparation method thereof |
| CN112358685A (en) * | 2020-11-11 | 2021-02-12 | 四川文诚管业有限公司 | Reinforced polypropylene double-wall corrugated pipe and production process thereof |
| CN113402801A (en) * | 2021-06-21 | 2021-09-17 | 福建亚通新材料科技股份有限公司 | UHMWPE composite double-wall corrugated pipe |
| CN114656690A (en) * | 2022-02-28 | 2022-06-24 | 海南联塑科技实业有限公司 | Modified basalt flake material, preparation method thereof and HDPE double-wall corrugated pipe containing modified basalt flake material |
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| CN103360659A (en) * | 2012-04-03 | 2013-10-23 | 李胜春 | High-performance high-density polyethylene (HDPE) pipe fitting |
| CN103786324A (en) * | 2014-01-22 | 2014-05-14 | 安徽大地工程管道有限公司 | Process for producing double-wall corrugated pipe |
| CN104989890A (en) * | 2015-07-17 | 2015-10-21 | 四川省川杭塑胶科技有限公司 | Underground double-layer reinforced and modified polyolefin (DRPO) corrugated pipe for water draining and sewage discharging |
| CN109838628A (en) * | 2019-03-15 | 2019-06-04 | 惠升管业有限公司 | A kind of winter double-wall corrugated pipe and preparation method thereof |
| CN112358685A (en) * | 2020-11-11 | 2021-02-12 | 四川文诚管业有限公司 | Reinforced polypropylene double-wall corrugated pipe and production process thereof |
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Application publication date: 20221202 |