CN108102505B - Pipeline inner wall coating, preparation method thereof and application thereof in underground pipe network - Google Patents

Pipeline inner wall coating, preparation method thereof and application thereof in underground pipe network Download PDF

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Publication number
CN108102505B
CN108102505B CN201711268124.8A CN201711268124A CN108102505B CN 108102505 B CN108102505 B CN 108102505B CN 201711268124 A CN201711268124 A CN 201711268124A CN 108102505 B CN108102505 B CN 108102505B
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molecular weight
weight polyethylene
pipeline
ultra
coating
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CN108102505A (en
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徐海香
陈国夫
周引
李卓
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Shanghai Senlang Construction Engineering Co ltd
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Shanghai Senlang Construction Engineering Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
    • C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D123/04—Homopolymers or copolymers of ethene
    • C09D123/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C09D163/04—Epoxynovolacs
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • 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
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
    • 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
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe
    • 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
    • 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
    • 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
    • C08L2207/068—Ultra high molecular weight polyethylene

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Laminated Bodies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The invention relates to the technical field of pipeline engineering, and discloses a pipeline inner wall coating, a preparation method thereof and application thereof in an underground pipe network. The pipeline inner wall coating disclosed by the invention comprises resin, ultrahigh molecular weight polyethylene filled in the resin and a curing agent. Because the ultra-high molecular weight polyethylene has high impact strength, high abrasion resistance and smaller friction coefficient, the coating on the inner wall of the pipeline can greatly improve the lubricity, abrasion resistance, impact resistance and corrosion resistance of the inner wall of the pipeline. In the preparation and use aspects, the coating can be conveniently coated in sewage and rainwater pipelines, and is particularly suitable for pipelines which are easy to impact and wear, such as bent pipes, tee joints, diameter changes and the like. In addition, the compounding of the ultra-high molecular weight polyethylene and the resin is beneficial to coating and use, and can overcome the defect of difficult processing of the ultra-high molecular weight polyethylene.

Description

Pipeline inner wall coating, preparation method thereof and application thereof in underground pipe network
Technical Field
The invention relates to the technical field of pipeline engineering, in particular to a pipeline inner wall coating and application thereof in an underground pipe network.
Background
With the rapid economic development of the country, the laying length and scale of underground pipe networks are continuously increased. In the process of conveying sewage or rainwater, solids such as gravel, glass, tree branches and the like are often accompanied at the same time, so that the phenomena of abrasion, aging, corrosion and the like of the inner wall of the pipeline are caused, and the service life of the pipeline is seriously influenced. These phenomena of abrasion, corrosion, etc. are particularly serious at the locations where the pipe bends, tee joints, pipe connections, and pipe internal diameters become smaller, because the solid-liquid mixture has a more significant scouring effect on the pipe walls due to the increase of the water flow speed or the change of the water flow direction at these locations. Therefore, it is the key to improve the service life of the sewer pipe to enhance the abrasion and impact resistance of the inner wall of the sewer pipe without affecting the sewage or rainwater transport capacity.
To enhance the impact and abrasion resistance of the pipe, inner wall coatings or lining methods are generally used. The inner wall coating in the former method is usually composed of thermosetting resins such as epoxy resin, polyurethane and the like, and has the advantages that spraying and other modes can be adopted, the coating mode is simple, pipelines with various pipe diameters and shapes can be used, and the coating has certain functions of corrosion resistance, abrasion resistance and pipeline drag reduction, but the anti-scouring and abrasion resistance capabilities are still insufficient.
The latter method of adding lining pipe to the inner wall of metal pipeline to form composite pipeline usually adopts "wear-resisting king" ultra-high molecular weight polyethylene pipe, and can obtain better superior performances of wear resistance, impact resistance, lubricity, etc. Then, the excellent characteristics of ultra-high molecular weight polyethylene are derived from its ultra-high molecular weight (generally, the molecular weight is more than 100 ten thousand), which makes the ultra-high molecular weight polyethylene difficult to dissolve or melt, and causes high difficulty in processing. In addition, different molds are required to be used for forming different pipe diameters, and the processing of the tee joint, the bent pipe and the pipe diameter change part is more complicated for connection.
Therefore, those skilled in the art are always seeking underground pipe network maintenance techniques suitable for underground pipe network pipelines, which have better impact resistance and abrasion resistance and are convenient to process and use.
Disclosure of Invention
The invention aims to provide a pipeline inner wall coating which has the advantages of good impact resistance and wear resistance, and the processing and using method is simple and convenient.
The invention also aims to provide a preparation method of the pipeline inner wall coating.
The invention also aims to provide the application of the pipeline inner wall coating in the underground pipe network.
In order to solve the above technical problems, an embodiment of the present invention provides a coating layer for an inner wall of a pipeline, including a resin, an ultra-high molecular weight polyethylene filled in the resin, and a curing agent.
Compared with the prior art, the invention provides that the ultrahigh molecular weight polyethylene is filled in the resin, and the composite material is used as the coating of the inner wall of the pipeline. Because the ultra-high molecular weight polyethylene has high impact strength, high abrasion resistance and smaller friction coefficient, the coating on the inner wall of the pipeline can greatly improve the lubricity, abrasion resistance, impact resistance and corrosion resistance of the inner wall of the pipeline. The coating can be conveniently coated in sewage and rainwater pipelines, and is particularly suitable for pipelines which are easy to impact and wear, such as bent pipes, tee joints, diameter changes and the like. In addition, the compounding of the ultra-high molecular weight polyethylene and the resin is beneficial to coating and use, and can overcome the defect of difficult processing of the ultra-high molecular weight polyethylene.
In the pipe inner wall coating provided by the embodiment of the invention, the ultrahigh molecular weight polyethylene is ultrahigh molecular weight polyethylene particles or ultrahigh molecular weight polyethylene fibers, and because the ultrahigh molecular weight polyethylene is difficult to dissolve or melt, the ultrahigh molecular weight polyethylene particles or fibers are filled in a filler form, and the mass percentage of the ultrahigh molecular weight polyethylene is 10-80%.
In the pipe inner wall coating provided by the embodiment of the invention, the resin is a resin for thermosetting paint.
Further, the resin for thermosetting coating is epoxy resin or polyurethane. The epoxy resin is bisphenol A type epoxy resin, bisphenol F type epoxy resin or phenolic resin type epoxy resin.
In the pipe inner wall coating provided by the embodiment of the invention, the curing agent is an amine curing agent, an anhydride curing agent, a phenol curing agent or a thiol curing agent.
Preferably, in the pipe inner wall coating provided by the embodiment of the invention, the resin is a bisphenol a type epoxy resin, and the curing agent is an amine curing agent. In consideration of the interface problem with the ultra-high molecular weight polyethylene, the lower softening temperature (80 ℃) of the ultra-high molecular weight polyethylene and other factors, the bisphenol A type epoxy resin and the amine curing agent are used as the optimal scheme to ensure that the interface is good, and the curing temperature of the epoxy resin is lower than the softening temperature of the ultra-high molecular weight polyethylene.
In addition, the pipeline inner wall coating provided by the embodiment of the invention also comprises an anti-oxidation auxiliary material or an anti-corrosion auxiliary material. According to the requirement of practical application, after the ultra-high molecular weight polyethylene filler is adopted, a small amount of other traditional fillers for improving oxidation resistance and corrosion resistance can be added, so that the coating has corresponding performance.
The embodiment of the invention also provides a preparation method of the pipeline inner wall coating.
When the ultrahigh molecular weight polyethylene particles are selected, the ultrahigh molecular weight polyethylene particles and resin are uniformly mixed to form a composite liquid coating, and the composite liquid coating is coated on the inner wall of the pipeline and cured. The above method is simple and convenient to operate, but because the density and surface energy of the ultra-high molecular weight polyethylene particles and the resin may be mismatched, the particles are easily aggregated after coating, and thus, the step of uniformly mixing the ultra-high molecular weight polyethylene particles and the resin to form the composite liquid coating material needs to be performed at a pipeline construction site, i.e., the ultra-high molecular weight polyethylene particles and the resin are coated on the inner wall of the pipeline after being mixed at the site.
Another way to avoid the unevenness of the ultra high molecular weight polyethylene particles is: sintering ultrahigh molecular weight polyethylene particles into sheets, pouring the resin into the sheets of ultrahigh molecular weight polyethylene, semi-curing the resin into a film, paving the film on the inner wall of a pipeline, and curing the film. The method has the advantages that: the steps of firstly sintering the ultra-high molecular weight polyethylene particles into sheets, then pouring the resin into the sheets of ultra-high molecular weight polyethylene, and semi-curing into a film are carried out in advance or on the pipeline site. Namely, the semi-cured film can be prepared in advance without field configuration, and can be directly used at the position easy to wear when in use, and the problem of particle aggregation can be avoided.
When the ultrahigh molecular weight polyethylene fibers are selected, the ultrahigh molecular weight polyethylene fibers are woven into fiber cloth, then the resin is poured into the fiber cloth, semi-cured, cut, laid on the inner wall of the pipeline, and then cured. In the cutting step, appropriate semi-cured fiber resin can be cut according to the size and the shape of the pipeline, so that the semi-cured fiber resin is matched with the size and the shape of the inner wall of the pipeline.
In the preparation method of the pipe inner wall coating provided by the embodiment of the present invention, the ultrahigh molecular weight polyethylene particles or the ultrahigh molecular weight polyethylene fibers may be subjected to discharge pretreatment, plasma pretreatment, or acidification pretreatment. Since the polarity of the ultra-high molecular weight polyethylene particles or fibers is weak, when the ultra-high molecular weight polyethylene particles or fibers are added into the resin, problems such as poor interfaces between the particles or fibers and the resin may be caused by high polarity of the resin, mismatch of thermal expansion coefficients, and the like. Therefore, the particles or the fibers can be pretreated by methods such as discharge, plasma treatment, acidification treatment and the like, and an oxide layer with higher polarity is formed on the surface to be better compounded with the resin.
The embodiment of the invention also provides the application of the pipeline inner wall coating in the underground pipe network. The coating is applied to the inner walls of sewage and rainwater pipelines of underground pipe networks, particularly the positions of elbows, tees, joints, diameters and other pipelines which are easy to be impacted and abraded, the preparation and use steps are convenient, and the lubricity, abrasion resistance, impact resistance and corrosion resistance of the inner walls of the pipelines can be greatly improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solutions claimed in the claims of the present invention can be implemented without these technical details and with various changes and modifications based on the following embodiments.
Some embodiments of the present invention provide a coating layer for an inner wall of a pipeline, comprising a resin, an ultra-high molecular weight polyethylene filled in the resin, and a curing agent. Specifically, the resin used in these embodiments is a thermosetting coating resin such as an epoxy resin or a polyurethane, and further, the epoxy resin used may be a bisphenol a type epoxy resin, a bisphenol F type epoxy resin, or a phenol resin type epoxy resin. The used ultra-high molecular weight polyethylene is ultra-high molecular weight polyethylene particles or ultra-high molecular weight polyethylene fibers, and the mass percentage of the ultra-high molecular weight polyethylene is 10-80%. The curing agent is amine curing agent, acid anhydride curing agent, phenol curing agent or thiol curing agent. On the basis, a small amount of other traditional fillers for improving the oxidation resistance and the corrosion resistance can be added.
In some embodiments, the invention also provides a preparation method of the coating on the inner wall of the pipeline and application of the coating in the underground pipe network. When ultrahigh molecular weight polyethylene particles are selected, one of the preparation methods is: uniformly mixing ultrahigh molecular weight polyethylene particles with resin to form a composite liquid coating, coating the composite liquid coating on the inner wall of a pipeline, and curing; in order to avoid the unevenness of the ultra-high molecular weight polyethylene particles, the method needs to be mixed on site and then coated on the inner wall of the pipeline. The other preparation method is as follows: sintering ultrahigh molecular weight polyethylene particles into sheets, pouring the resin into the sheets of ultrahigh molecular weight polyethylene, semi-curing the resin into a film, paving the film on the inner wall of a pipeline, and curing the film. The method does not need on-site configuration, can prepare the semi-cured film in advance, directly uses the semi-cured film at a position easy to wear when in use, and can also avoid the problem of particle aggregation. When the ultrahigh molecular weight polyethylene fibers are selected, the ultrahigh molecular weight polyethylene fibers can be woven into fiber cloth, then the resin is poured into the fiber cloth, semi-cured, cut according to the size and the shape of the pipeline, laid on the inner wall of the pipeline, and then cured.
In addition, in some other embodiments of the present invention, the ultrahigh molecular weight polyethylene particles or the ultrahigh molecular weight polyethylene fibers are further subjected to a discharge pretreatment, a plasma pretreatment, or an acidification pretreatment before the coating layer on the inner wall of the pipe is prepared.
The following are examples of some specific embodiments.
Example 1
A pipeline inner wall coating comprises bisphenol A type epoxy resin, ultra-high molecular weight polyethylene particles filled in the bisphenol A type epoxy resin and an amine curing agent, wherein the mass percentage content of the ultra-high molecular weight polyethylene particles is 30%.
The preparation method comprises the following steps: the method comprises the steps of carrying out pre-discharge treatment on ultra-high molecular weight polyethylene particles, uniformly mixing the ultra-high molecular weight polyethylene particles with bisphenol A epoxy resin on the site of a pipeline to form a composite liquid coating, coating the composite liquid coating on the inner wall of the pipeline, and curing by using an amine curing agent to form a coating without particle aggregation.
The coating is applied to the inner walls of sewage and rainwater pipelines of underground pipe networks, particularly to the positions of bent pipes, tee joints, diameter changes and other pipelines which are easy to be impacted and abraded, and can greatly improve the lubricity, abrasion resistance, impact resistance and corrosion resistance of the inner walls of the pipelines.
Example 2
A pipeline inner wall coating comprises bisphenol A type epoxy resin, ultra-high molecular weight polyethylene particles filled in the bisphenol A type epoxy resin and an amine curing agent, wherein the mass percentage content of the ultra-high molecular weight polyethylene particles is 60%.
The preparation method comprises the following steps: the preparation method comprises the steps of carrying out plasma pretreatment on ultra-high molecular weight polyethylene particles, sintering the ultra-high molecular weight polyethylene particles into sheets, pouring bisphenol A epoxy resin into the sheets of ultra-high molecular weight polyethylene, semi-curing the sheets into a film by using an amine curing agent, paving the film on the inner wall of a pipeline, and curing the film by using the amine curing agent. The method does not need on-site configuration, can prepare the semi-cured film in advance, directly uses the semi-cured film at a position easy to wear when in use, and can also avoid the problem of particle aggregation.
The coating is applied to the inner walls of sewage and rainwater pipelines of underground pipe networks, particularly to the positions of bent pipes, tee joints, diameter changes and other pipelines which are easy to be impacted and abraded, and can greatly improve the lubricity, abrasion resistance, impact resistance and corrosion resistance of the inner walls of the pipelines.
Example 3
A pipeline inner wall coating comprises bisphenol A type epoxy resin, ultrahigh molecular weight polyethylene fibers filled in the bisphenol A type epoxy resin and an amine curing agent, wherein the ultrahigh molecular weight polyethylene fibers account for 70% by mass.
The preparation method comprises the following steps: weaving ultra-high molecular weight polyethylene fibers into fiber cloth, pouring bisphenol A epoxy resin into the fiber cloth, semi-curing by using an amine curing agent, cutting the fiber cloth according to the size and the shape of a pipeline, paving the cut fiber cloth on the inner wall of the pipeline, and curing by using the amine curing agent.
The coating is applied to the inner walls of sewage and rainwater pipelines of underground pipe networks, particularly to the positions of bent pipes, tee joints, diameter changes and other pipelines which are easy to be impacted and abraded, and can greatly improve the lubricity, abrasion resistance, impact resistance and corrosion resistance of the inner walls of the pipelines.
Example 4
A pipeline inner wall coating comprises phenolic resin type epoxy resin, ultra-high molecular weight polyethylene particles filled in the phenolic resin type epoxy resin and a phenol curing agent, wherein the mass percentage content of the ultra-high molecular weight polyethylene particles is 50%.
The preparation method comprises the following steps: the method comprises the steps of uniformly mixing ultrahigh molecular weight polyethylene particles with phenolic resin type epoxy resin on a pipeline site to form a composite liquid coating, coating the composite liquid coating on the inner wall of the pipeline, and curing by using a phenolic curing agent, wherein the formed coating does not have the problem of particle aggregation.
The coating is applied to the inner walls of sewage and rainwater pipelines of underground pipe networks, particularly to the positions of bent pipes, tee joints, diameter changes and other pipelines which are easy to be impacted and abraded, and can greatly improve the lubricity, abrasion resistance, impact resistance and corrosion resistance of the inner walls of the pipelines.
Example 5
The pipeline inner wall coating comprises polyurethane, ultrahigh molecular weight polyethylene particles filled in the polyurethane and an anhydride curing agent, wherein the mass percentage of the ultrahigh molecular weight polyethylene particles is 60%.
The preparation method comprises the following steps: sintering ultrahigh molecular weight polyethylene particles into sheets, pouring polyurethane into the sheets of ultrahigh molecular weight polyethylene, semi-curing the sheets of ultrahigh molecular weight polyethylene into films by using an acid anhydride curing agent, paving the films on the inner walls of pipelines, and curing the films by using the acid anhydride curing agent. The method does not need on-site configuration, can prepare the semi-cured film in advance, directly uses the semi-cured film at a position easy to wear when in use, and can also avoid the problem of particle aggregation.
The coating is applied to the inner walls of sewage and rainwater pipelines of underground pipe networks, particularly to the positions of bent pipes, tee joints, diameter changes and other pipelines which are easy to be impacted and abraded, and can greatly improve the lubricity, abrasion resistance, impact resistance and corrosion resistance of the inner walls of the pipelines.
Example 6
The pipeline inner wall coating comprises bisphenol F type epoxy resin, ultrahigh molecular weight polyethylene fibers filled in the bisphenol F type epoxy resin and a thiol group curing agent, wherein the mass percentage content of the ultrahigh molecular weight polyethylene particles is 45%.
The preparation method comprises the following steps: the method comprises the steps of acidizing and pretreating the ultra-high molecular weight polyethylene fibers, weaving the ultra-high molecular weight polyethylene fibers into fiber cloth, pouring bisphenol F epoxy resin into the fiber cloth, semi-solidifying by using a thiol curing agent, cutting the fiber cloth according to the size and the shape of a pipeline, paving the cut fiber cloth on the inner wall of the pipeline, and solidifying by using the thiol curing agent.
The coating is applied to the inner walls of sewage and rainwater pipelines of underground pipe networks, particularly to the positions of bent pipes, tee joints, diameter changes and other pipelines which are easy to be impacted and abraded, and can greatly improve the lubricity, abrasion resistance, impact resistance and corrosion resistance of the inner walls of the pipelines.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims (6)

1. A preparation method of a pipeline inner wall coating is characterized in that ultra-high molecular weight polyethylene particles are sintered into a sheet shape, resin is poured into the sheet ultra-high molecular weight polyethylene, the sheet ultra-high molecular weight polyethylene is semi-solidified into a film, and the film is laid on the inner wall of a pipeline and solidified;
wherein the weight percentage content of the ultra-high molecular weight polyethylene in the film is 10-80%;
the steps of sintering the ultra-high molecular weight polyethylene particles into sheets, pouring the resin into the sheets of ultra-high molecular weight polyethylene, and semi-curing into a film are performed in advance or on the pipeline site.
2. The method for preparing a pipe inner wall coating according to claim 1, wherein the resin is a thermosetting coating resin.
3. The method for preparing a pipe inner wall coating according to claim 2, wherein the resin for thermosetting paint is epoxy resin or polyurethane.
4. The method for preparing a coating layer on the inner wall of a pipeline according to claim 3, wherein the epoxy resin is bisphenol A type epoxy resin, bisphenol F type epoxy resin or phenolic resin type epoxy resin.
5. The method for preparing a coating layer on an inner wall of a pipe according to claim 1, wherein the ultra-high molecular weight polyethylene particles are subjected to discharge pretreatment, plasma pretreatment or acidification pretreatment.
6. Use of a pipe inner wall coating prepared by the method of any one of claims 1 to 5 in an underground pipe network.
CN201711268124.8A 2017-12-05 2017-12-05 Pipeline inner wall coating, preparation method thereof and application thereof in underground pipe network Active CN108102505B (en)

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CN109385197A (en) * 2018-10-22 2019-02-26 安徽青润精密科技有限公司 A kind of preparation method of corrosion-resistant drainage pipeline

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JP3710355B2 (en) * 2000-03-30 2005-10-26 株式会社栗本鐵工所 Pipe end anti-corrosion structure for pipe joints
JP3913028B2 (en) * 2001-10-19 2007-05-09 日東電工株式会社 Film for printing and method for producing the same
CN101503593A (en) * 2009-02-27 2009-08-12 天津开发区欣特涂层技术有限公司 Anti-corrosive anti-abrasion coating powder for metal pipeline
CN103831960A (en) * 2012-11-22 2014-06-04 山东东方管业有限公司 High-pressure-resistant ultrahigh-molecular-weight polyethylene composite bend and manufacturing method thereof
CN103737938B (en) * 2013-12-05 2016-08-17 江苏金波新材料科技有限公司 A kind of preparation method of novel anticorrosion composite pressure pipe material
CN204141083U (en) * 2014-03-18 2015-02-04 天津市昊航复合管业有限公司 A kind of plastic coated composite steel pipe
CN104479194A (en) * 2014-11-19 2015-04-01 广东联塑科技实业有限公司 Wear-resistant PE (polyethylene) composition as well as preparation method and application thereof

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