CN112443709A - Multi-element composite pipeline - Google Patents

Multi-element composite pipeline Download PDF

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Publication number
CN112443709A
CN112443709A CN202011418648.2A CN202011418648A CN112443709A CN 112443709 A CN112443709 A CN 112443709A CN 202011418648 A CN202011418648 A CN 202011418648A CN 112443709 A CN112443709 A CN 112443709A
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resin layer
layer
ceramic coating
fiber web
component composite
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Inventor
钱根
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Suzhou Jiyuan Pipe Industry Co ltd
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Suzhou Jiyuan Pipe Industry Co ltd
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Priority to CN202011418648.2A priority Critical patent/CN112443709A/en
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    • 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
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • 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
    • B29D23/001—Pipes; Pipe joints
    • 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
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/14—Coatings characterised by the materials used by ceramic or vitreous materials
    • 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
    • F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

本发明提供了一种多元复合管道，包括树脂层和增强层，所述树脂层包括内层树脂层和外层树脂层，所述树脂层位于增强层的两侧，呈三明治结构，所述增强层为纤维网外侧喷涂陶瓷涂层。本发明提供多元复合管道，利用树脂层外管和陶瓷涂层结合，将陶瓷高硬、不粘、耐蚀的优点与树脂层融合为一体，赋予复合材料制品优异的力学性能。The invention provides a multi-component composite pipe, comprising a resin layer and a reinforcement layer, the resin layer includes an inner resin layer and an outer resin layer, the resin layers are located on both sides of the reinforcement layer, in a sandwich structure, the reinforcement layer The layer is a ceramic coating sprayed on the outside of the fiber web. The invention provides a multi-component composite pipe, which combines the advantages of high hardness, non-stick and corrosion resistance of ceramics with the resin layer by combining the resin layer outer tube and the ceramic coating, and endows the composite material product with excellent mechanical properties.

Description

Multi-element composite pipeline
Technical Field
The invention relates to the field of pipelines, in particular to a multi-element composite pipeline.
Background
With the continuous and rapid development of the economy of China, pipeline transportation plays an increasingly important role in the national economy, the national defense industry and the daily life of people, such as: the transportation of resources such as drinking water, natural gas, heating, petroleum and the like is of great importance to the development of national economy, and pipelines for the transportation of various fluids have also been rapidly developed since the 90 s of the 20 th century. The pipeline can be divided into a metal pipeline and a non-metal pipeline according to the material, the metal pipeline has the advantages of high temperature resistance, high pressure resistance, scratch resistance and the like, but has the defects of heaviness, uneasiness in bending, rough pipe wall, easiness in rusting, easiness in corroding and the like; the non-metal pipeline (such as a plastic pipeline) made of a single material can overcome a plurality of defects of the metal pipeline, but has the problems of low strength, poor scratch resistance, insufficient heat resistance and the like. In order to overcome the respective shortcomings of metal pipelines and plastic pipelines, various composite pipelines are produced. The reinforced thermoplastic composite pipeline with thermoplastic plastics as the inner layer and the outer layer and various reinforced materials as the core layer is a novel pipeline integrating the advantages of various pipelines, and is favored by the market from the beginning to the end because of the remarkable advantages of excellent performance, convenient transportation and installation, low maintenance cost and the like.
Disclosure of Invention
The technical problem to be solved is as follows: the invention aims to provide a multi-element composite pipeline, which combines the outer pipe of a resin layer with a ceramic coating, integrates the advantages of high hardness, non-sticking and corrosion resistance of ceramic with the resin layer, and endows a composite product with excellent mechanical properties.
The technical scheme is as follows: the utility model provides a many first composite pipe, includes resin layer and enhancement layer, the resin layer includes inlayer resin layer and outer resin layer, the resin layer is located the both sides of enhancement layer, is sandwich structure, the enhancement layer is the fibre web outside spraying ceramic coating.
Preferably, the resin layer is any one of PVC, PE or PC resin.
Preferably, the fiber net of the reinforcing layer is a nylon fiber net, the reinforcing layer is formed by winding the nylon fiber net, the thickness of the fiber net is controlled to be 0.1mm-1mm, the fiber net is a plain porous fabric, and the cover tightness of the fiber net is 25-35%.
Preferably, the reinforcing layer wraps the outer side of the inner resin layer in integral circles, two adjacent fiber nets form different angles, and the angle between the two adjacent fiber nets is 45-90 degrees.
A preparation method of a multi-element composite pipeline comprises the following steps:
s1, melting and extruding a resin layer inner pipe on an extruder;
s2, winding a fiber net on the inner pipe of the resin layer according to a certain angle, spraying a ceramic coating after winding, and drying and curing the argil coating;
and S3, drying and curing the ceramic coating, performing surface treatment, and then performing co-extrusion coating on the outer pipe of the resin layer to obtain the multi-element pipe. Preferably, the spraying of the ceramic coating in the step S2 includes the following steps:
s1, dissolving ZrOCl.8H2O in an ethanol aqueous solution, mixing and stirring uniformly, gradually dropwise adding an anhydrous ethanol solution of ethyl orthosilicate, finally adding hydrochloric acid, and stirring to react to obtain a colorless silica gel solution;
s2, adding an absolute ethyl alcohol solution of butyl titanate into the silica gel solution, and uniformly stirring to obtain a clear sol;
s3, coating the sol on the outer side of the fiber web in a spin coating mode, and curing at a certain temperature.
Preferably, the curing temperature in the step S3 is 100-150 ℃.
Preferably, the surface processing in step S3 includes the steps of: adding tetraethoxysilane and silane coupling agent into water, stirring uniformly, then adding acid solution, stirring, adding methyl methacrylate and dibenzoyl peroxide, stirring uniformly, and then coating on the outer side of the ceramic coating.
Preferably, the extruder for the outer tube of the resin layer in the step S3 is a single screw extruder, the temperatures of the heating zones of the extruder are 150 ℃, 170 ℃, 190 ℃, and the head temperature is 180 ℃.
Has the advantages that: the invention has the following advantages:
1. the nylon fiber net prepared by the invention replaces the conventional glass fiber or carbon fiber net, and the outer pipe and the inner pipe of the resin layer are reinforced by the combined action of the nylon fiber net and the ceramic coating, so that the pipeline is more economical, lighter and capable of bearing stronger axial stress;
2. the plastic pipe has limited heat resistance, and can not exceed 200 ℃, and the ceramic coating is cured at the low temperature of 100-150 ℃, so that the melting of resin can not occur, and the performance of the pipe is changed;
3. when the outer pipe of the resin layer and the ceramic coating are compounded, the surface of the ceramic coating is firstly compounded to enhance the interface bonding force of the ceramic and the metal, so that the advantages of high hardness, non-sticking and corrosion resistance of the ceramic are integrated with the resin layer, and the composite material product is endowed with excellent mechanical properties.
Detailed Description
Example 1
The utility model provides a many first compound pipelines, its characterized in that, includes resin layer and enhancement layer, the resin layer includes inlayer resin layer and outer resin layer, the resin layer is located the both sides of enhancement layer, is sandwich structure, the enhancement layer is the fibre web outside spraying ceramic coating, the resin layer is the PVC resin.
The reinforcing layer fiber net is a nylon fiber net, the reinforcing layer is formed by winding the nylon fiber net, the fiber net is a plain porous fabric, and the cover tightness of the fiber net is 25%.
Preferably, the reinforcing layer is wrapped 2 layers outside the inner resin layer.
A preparation method of a multi-element composite pipeline comprises the following steps:
s1, melting and extruding a resin layer inner pipe on an extruder;
s2, winding two adjacent fiber nets on the inner pipe of the resin layer according to an angle of 45 degrees, spraying a ceramic coating after winding, and drying and curing the argil coating, wherein the spraying of the ceramic coating comprises the following steps:
a. ZrOCl.8H2Dissolving O in ethanol water solution, mixing and stirring uniformly, gradually dropwise adding anhydrous ethanol solution of ethyl orthosilicate, finally adding hydrochloric acid, and stirring for reaction to obtain colorless silica gel solution;
b. adding an absolute ethyl alcohol solution of butyl titanate into the silica gel solution, and uniformly stirring to obtain clear sol;
c. the sol is coated on the outer side of the fiber web by means of spin coating and is cured at 100 ℃.
And S3, drying and curing the ceramic coating, and then carrying out surface treatment, namely adding ethyl orthosilicate and a silane coupling agent into water, uniformly stirring, then adding an acid solution, adding methyl methacrylate and dibenzoyl peroxide after stirring, smearing the mixture on the outer side of the ceramic coating after uniformly stirring, and then carrying out co-extrusion coating on the outer pipe of the resin layer to obtain the multi-element pipe.
Example 2
The utility model provides a many first compound pipelines, its characterized in that, includes resin layer and enhancement layer, the resin layer includes inlayer resin layer and outer resin layer, the resin layer is located the both sides of enhancement layer, is sandwich structure, the enhancement layer is the fibre web outside spraying ceramic coating, the resin layer is the PC resin.
The reinforcing layer fiber net is a nylon fiber net, the reinforcing layer is formed by winding the nylon fiber net, the fiber net is a plain porous fabric, and the cover tightness of the fiber net is 35%.
Preferably, the reinforcing layer covers 1 layer outside the inner resin layer.
A preparation method of a multi-element composite pipeline comprises the following steps:
s1, melting and extruding a resin layer inner pipe on an extruder;
s2, winding two adjacent fiber nets on the inner pipe of the resin layer according to an angle of 90 degrees, spraying a ceramic coating after winding, and drying and curing the argil coating, wherein the spraying of the ceramic coating comprises the following steps:
a. ZrOCl.8H2Dissolving O in ethanol water solution, mixing and stirring uniformly, gradually dropwise adding anhydrous ethanol solution of ethyl orthosilicate, finally adding hydrochloric acid, and stirring for reaction to obtain colorless silica gel solution;
b. adding an absolute ethyl alcohol solution of butyl titanate into the silica gel solution, and uniformly stirring to obtain clear sol;
c. the sol was applied to the outside of the web by spin coating and cured at 150 ℃.
And S3, drying and curing the ceramic coating, and then carrying out surface treatment, namely adding ethyl orthosilicate and a silane coupling agent into water, uniformly stirring, then adding an acid solution, adding methyl methacrylate and dibenzoyl peroxide after stirring, smearing the mixture on the outer side of the ceramic coating after uniformly stirring, and then carrying out co-extrusion coating on the outer pipe of the resin layer to obtain the multi-element pipe.
Example 3
The utility model provides a many first compound pipelines, its characterized in that, includes resin layer and enhancement layer, the resin layer includes inlayer resin layer and outer resin layer, the resin layer is located the both sides of enhancement layer, is sandwich structure, the enhancement layer is the fibre web outside spraying ceramic coating, the resin layer is the PVC resin.
The reinforcing layer fiber net is a nylon fiber net, the reinforcing layer is formed by winding the nylon fiber net into a fiber net which is a plain porous fabric, and the covering degree of the fiber net is 30%.
Preferably, the reinforcing layer is coated with 4 layers outside the inner resin layer.
A preparation method of a multi-element composite pipeline comprises the following steps:
s1, melting and extruding a resin layer inner pipe on an extruder;
s2, winding two adjacent layers of fiber nets on an inner pipe of the resin layer according to an angle of 60 degrees, spraying a ceramic coating after winding, and drying and curing the argil coating, wherein the spraying of the ceramic coating comprises the following steps:
a. ZrOCl.8H2Dissolving O in ethanol water solution, mixing and stirring uniformly, gradually dropwise adding anhydrous ethanol solution of ethyl orthosilicate, finally adding hydrochloric acid, and stirring for reaction to obtain colorless silica gel solution;
b. adding an absolute ethyl alcohol solution of butyl titanate into the silica gel solution, and uniformly stirring to obtain clear sol;
c. the sol is coated on the outer side of the fiber web by means of spin coating and is cured at 120 ℃.
And S3, drying and curing the ceramic coating, and then carrying out surface treatment, namely adding ethyl orthosilicate and a silane coupling agent into water, uniformly stirring, then adding an acid solution, adding methyl methacrylate and dibenzoyl peroxide after stirring, smearing the mixture on the outer side of the ceramic coating after uniformly stirring, and then carrying out co-extrusion coating on the outer pipe of the resin layer to obtain the multi-element pipe.
Example 4
The utility model provides a many first compound pipelines, its characterized in that, includes resin layer and enhancement layer, the resin layer includes inlayer resin layer and outer resin layer, the resin layer is located the both sides of enhancement layer, is sandwich structure, the enhancement layer is the fibre web outside spraying ceramic coating, the resin layer is the PVC resin.
The reinforcing layer fiber net is a nylon fiber net, the reinforcing layer is formed by winding the nylon fiber net, the fiber net is a plain porous fabric, and the cover tightness of the fiber net is 25%.
Preferably, the reinforcing layer is coated with 3 layers outside the inner resin layer.
A preparation method of a multi-element composite pipeline comprises the following steps:
s1, melting and extruding a resin layer inner pipe on an extruder;
s2, winding two adjacent fiber nets on the inner pipe of the resin layer according to an angle of 90 degrees, spraying a ceramic coating after winding, and drying and curing the argil coating, wherein the spraying of the ceramic coating comprises the following steps:
a. ZrOCl.8H2Dissolving O in ethanol water solution, mixing and stirring uniformly, gradually dropwise adding anhydrous ethanol solution of ethyl orthosilicate, finally adding hydrochloric acid, and stirring for reaction to obtain colorless silica gel solution;
b. adding an absolute ethyl alcohol solution of butyl titanate into the silica gel solution, and uniformly stirring to obtain clear sol;
c. the sol was applied to the outside of the web by spin coating and cured at 130 ℃.
And S3, drying and curing the ceramic coating, and then carrying out surface treatment, namely adding ethyl orthosilicate and a silane coupling agent into water, uniformly stirring, then adding an acid solution, adding methyl methacrylate and dibenzoyl peroxide after stirring, smearing the mixture on the outer side of the ceramic coating after uniformly stirring, and then carrying out co-extrusion coating on the outer pipe of the resin layer to obtain the multi-element pipe.
Comparative example 1
The utility model provides a many first compound pipelines, its characterized in that, includes resin layer and enhancement layer, the resin layer includes inlayer resin layer and outer resin layer, the resin layer is located the both sides of enhancement layer, is sandwich structure, the enhancement layer is the fibre web outside spraying ceramic coating, the resin layer is the PVC resin.
The fiber net of the reinforced layer is a glass fiber net, the fiber net formed by winding the reinforced layer through the glass fiber net is a plain porous fabric, and the covering degree of the fiber net is 30%.
Preferably, the reinforcing layer is coated with 4 layers outside the inner resin layer.
A preparation method of a multi-element composite pipeline comprises the following steps:
s1, melting and extruding a resin layer inner pipe on an extruder;
s2, winding two adjacent layers of fiber nets on an inner pipe of the resin layer according to an angle of 60 degrees, spraying a ceramic coating after winding, and drying and curing the argil coating, wherein the spraying of the ceramic coating comprises the following steps:
a. ZrOCl.8H2Dissolving O in ethanol water solution, mixing and stirring uniformly, gradually dropwise adding anhydrous ethanol solution of ethyl orthosilicate, finally adding hydrochloric acid, and stirring for reaction to obtain colorless silica gel solution;
b. adding an absolute ethyl alcohol solution of butyl titanate into the silica gel solution, and uniformly stirring to obtain clear sol;
c. the sol is coated on the outer side of the fiber web by means of spin coating and is cured at 120 ℃.
And S3, drying and curing the ceramic coating, and then carrying out surface treatment, namely adding ethyl orthosilicate and a silane coupling agent into water, uniformly stirring, then adding an acid solution, adding methyl methacrylate and dibenzoyl peroxide after stirring, smearing the mixture on the outer side of the ceramic coating after uniformly stirring, and then carrying out co-extrusion coating on the outer pipe of the resin layer to obtain the multi-element pipe.
Comparative example 2
The utility model provides a many first compound pipelines, its characterized in that, includes resin layer and enhancement layer, the resin layer includes inlayer resin layer and outer resin layer, the resin layer is located the both sides of enhancement layer, is sandwich structure, the resin layer is the PVC resin.
The reinforcing layer fiber net is a nylon fiber net, the reinforcing layer is formed by winding the nylon fiber net, the fiber net is a plain porous fabric, and the cover tightness of the fiber net is 25%.
Preferably, the reinforcing layer is coated with 3 layers outside the inner resin layer.
A preparation method of a multi-element composite pipeline comprises the following steps:
s1, melting and extruding a resin layer inner pipe on an extruder;
s2, winding two adjacent layers of fiber nets on the inner pipe of the resin layer according to an angle of 90 degrees;
and S3, co-extruding and coating the outer pipe of the resin layer to obtain the multi-element pipe.
The pipes prepared in the examples and comparative examples were tested for their performance according to the national standard, and the specific properties are given in the following table:
Figure BDA0002821224320000061

Claims (9)

1.一种多元复合管道，其特征在于，包括树脂层和增强层，所述树脂层包括内层树脂层和外层树脂层，所述树脂层位于增强层的两侧，呈三明治结构，所述增强层为纤维网外侧喷涂陶瓷涂层。1. A multi-component composite pipeline, characterized in that it comprises a resin layer and a reinforcing layer, the resin layer comprises an inner layer resin layer and an outer layer resin layer, and the resin layer is located on both sides of the reinforcing layer, in a sandwich structure, so The reinforcing layer is a ceramic coating sprayed on the outside of the fiber web. 2.根据权利要求1所述的一种多元复合管道，其特征在于：所述树脂层为PVC，PE或PC树脂中的任一一种。2 . The multi-component composite pipe according to claim 1 , wherein the resin layer is any one of PVC, PE or PC resin. 3 . 3.根据权利要求1所述的一种多元复合管道，其特征在于：所述增强层纤维网为尼龙纤维网，所述增强层通过尼龙纤维网缠绕而成，控制纤维网的厚度为0.1mm-1mm，纤维网为平纹多孔织物，所述纤维网的盖覆紧度为25-35％。3. A multi-component composite pipeline according to claim 1, characterized in that: the reinforcing layer fiber web is a nylon fiber web, the reinforcing layer is formed by winding the nylon fiber web, and the thickness of the control fiber web is 0.1 mm -1mm, the fiber web is a plain weave porous fabric, and the coverage tightness of the fiber web is 25-35%. 4.根据权利要求1所述的一种多元复合管道，其特征在于：所述增强层呈整数圈包覆在内层树脂层外侧，且相邻的两层纤维网呈不同的角度，相邻两层纤维网的角度为45-90°4 . The multi-component composite pipeline according to claim 1 , wherein the reinforcing layer is wrapped around the outer side of the inner resin layer in an integer number of turns, and the adjacent two layers of fiber webs are at different angles, and the adjacent fibrous webs are at different angles. 5 . The angle of the two-layer fiber web is 45-90° 5.一种多元复合管道的制备方法，其特征在于，包括以下步骤：5. a preparation method of multi-component composite pipeline, is characterized in that, comprises the following steps: S1.在挤出机上熔融挤出树脂层内管；S1. Melt and extrude the inner tube of the resin layer on the extruder; S2.将纤维网按一定的角度缠绕于树脂层内管上，缠绕后喷涂陶瓷涂层，将陶土涂层烘干固化；S2. Wind the fiber web on the inner tube of the resin layer at a certain angle, spray the ceramic coating after winding, and dry and solidify the ceramic coating; S3.将陶瓷涂层烘干固化后，进行表面处理，然后树脂层外管共挤包覆，得到多元管材。S3. After the ceramic coating is dried and cured, surface treatment is performed, and then the outer tube of the resin layer is co-extruded and coated to obtain a multi-component tube. 6.根据权利要求5所述一种多元复合管道的制备方法，其特征在于，所述步骤S2中陶瓷涂层的喷涂包括以下步骤：6. the preparation method of a kind of multi-component composite pipeline according to claim 5 is characterized in that, the spraying of ceramic coating in described step S2 comprises the following steps: S1.将ZrOCl·8H2O溶解于乙醇水溶液中，混合搅拌均匀后，逐渐滴加正硅酸乙酯的无水乙醇溶液，最后加入盐酸，搅拌反应得到无色的硅胶溶液；S1. Dissolve ZrOCl 8H2O in an aqueous ethanol solution, after mixing and stirring evenly, gradually add dropwise the absolute ethanol solution of ethyl orthosilicate, finally add hydrochloric acid, and stir to obtain a colorless silica gel solution; S2.在硅胶溶液中加入钛酸丁酯的无水乙醇溶液，搅拌均匀后，得到澄清溶胶；S2. Add the absolute ethanol solution of butyl titanate to the silica gel solution, and after stirring evenly, obtain a clear sol; S3.将溶胶通过旋涂的方式涂抹于纤维网外侧，在通过一定的温度进行固化。S3. Apply the sol to the outside of the fiber web by spin coating, and cure it at a certain temperature. 7.根据权利要求6所述一种多元复合管道的制备方法，其特征在于，所述步骤S3中的固化温度为100-150℃。7 . The method for preparing a multi-component composite pipeline according to claim 6 , wherein the curing temperature in the step S3 is 100-150° C. 8 . 8.根据权利要求5所述一种多元复合管道的制备方法，其特征在于，所述步骤S3中表面处理包括以下步骤：将正硅酸乙酯，硅烷偶联剂加入水中搅拌均匀，然后加入酸溶液，搅拌后加入甲基丙烯酸甲酯和过氧化二苯甲酰，搅拌均匀后涂抹于陶瓷涂层外侧。8 . The preparation method of a multi-component composite pipeline according to claim 5 , wherein the surface treatment in step S3 comprises the following steps: adding ethyl orthosilicate and silane coupling agent into water, stirring evenly, and then adding Acid solution, add methyl methacrylate and dibenzoyl peroxide after stirring, and apply to the outside of the ceramic coating after stirring evenly. 9.根据权利要求5所述一种多元复合管道的制备方法，其特征在于，所述步骤S3中树脂层外管挤出机为单螺杆挤出机，挤出机加热区的温度分别为150℃、150℃、170℃、190℃，机头温度为180℃。9. the preparation method of a kind of multi-component composite pipeline according to claim 5, is characterized in that, in described step S3, resin layer outer tube extruder is single-screw extruder, and the temperature of extruder heating zone is respectively 150 ℃ °C, 150 °C, 170 °C, 190 °C, and the head temperature is 180 °C.
CN202011418648.2A 2020-12-07 2020-12-07 Multi-element composite pipeline Pending CN112443709A (en)

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