CN112477213A - Production process of steel wire mesh framework polyethylene composite pipe and composite pipe prepared by production process - Google Patents

Production process of steel wire mesh framework polyethylene composite pipe and composite pipe prepared by production process Download PDF

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Publication number
CN112477213A
CN112477213A CN202011256371.8A CN202011256371A CN112477213A CN 112477213 A CN112477213 A CN 112477213A CN 202011256371 A CN202011256371 A CN 202011256371A CN 112477213 A CN112477213 A CN 112477213A
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Prior art keywords
layer
steel wire
pipe
parts
wire mesh
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Chinese (zh)
Inventor
李春邦
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Sichuan Wencheng Pipe Industry Co Ltd
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Sichuan Wencheng Pipe Industry Co Ltd
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Priority to CN202011256371.8A priority Critical patent/CN112477213A/en
Publication of CN112477213A publication Critical patent/CN112477213A/en
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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
    • B29D23/001—Pipes; Pipe joints
    • 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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
    • 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
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/10—Silicon-containing compounds
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
    • C09J151/06—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • 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
    • F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
    • 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
    • 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
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE

Abstract

The invention discloses a production process of a steel wire mesh framework polyethylene composite pipe and a composite pipe prepared by the same, and relates to the technical field of urban drainage pipeline materials. A production process of a steel wire mesh framework polyethylene composite pipe comprises the following steps: s1 inner tube plasticizing: plasticizing and extruding the inner layer plasticizing raw material, and shaping to obtain an inner layer pipe; s2 steel wire winding: coating adhesive resin glue on the surface of the first steel wire to prepare a first glue wire; winding a first rubber wire on the surface of the inner-layer pipe, and then crossly winding a second steel wire to obtain a plain wire pipe; s3 sizing: extruding the viscous resin adhesive on the surface of the plain fiber tube to form a second viscous layer on the surface of the plain fiber tube, and preparing an inner layer silk tube; s4 outer layer compounding: plasticizing and extruding the outer layer plasticizing raw material, forming a polyethylene outer layer on the surface of the inner layer wire tube, cooling and shaping to obtain the steel wire mesh framework polyethylene composite tube. The production process has the advantage of being beneficial to prolonging the service life of the product.

Description

Production process of steel wire mesh framework polyethylene composite pipe and composite pipe prepared by production process
Technical Field
The invention relates to the technical field of urban drainage pipeline materials, in particular to a steel wire mesh framework polyethylene composite pipe production process and a composite pipe prepared by the steel wire mesh framework polyethylene composite pipe production process.
Background
The steel wire net skeleton-polyethylene composite pipe is an improved steel skeleton-plastic composite pipe, and is made up by using high-strength over-molded steel wire skeleton and thermoplastic polyethylene as raw material, using polyethylene as base body, using steel wire wound net as skeleton reinforcement body and using modified adhesive resin to connect them together. The steel wire mesh skeleton polyethylene composite pipe has the advantages of excellent impact resistance, creep resistance and the like, and is widely used in the field of urban drainage pipelines.
CN103358559A discloses a manufacturing process of a steel wire mesh framework composite pipe, which adopts bare steel wires to weave a net to form a steel wire mesh framework layer, the steel wire mesh framework layer and a polyethylene base material are fused into a whole by using molten resin in the production process of the composite pipe, and an inner layer polyethylene pipe extruding machine and an outer layer polyethylene pipe extruding machine are integrated with a mould, thereby being beneficial to improving the stability of the product quality.
In view of the above-mentioned related technologies, the inventor believes that, because the expansion coefficient difference between polyethylene and the steel wire mesh framework layer is large, and the contraction coefficients of the two materials are different at different temperatures, cracks are easily generated in the compounding process, which brings certain adverse effects to the mechanical properties of the steel wire mesh framework composite pipe and is not beneficial to prolonging the service life of the product.
Disclosure of Invention
In order to prolong the service life of the steel wire mesh framework polyethylene composite pipe, the application provides a steel wire mesh framework polyethylene composite pipe production process and a composite pipe prepared by the steel wire mesh framework polyethylene composite pipe production process.
In a first aspect, the application provides a production process of a steel wire mesh framework polyethylene composite pipe, which adopts the following technical scheme:
a production process of a steel wire mesh framework polyethylene composite pipe comprises the following steps:
s1 inner tube plasticizing: weighing inner layer plasticized raw materials, uniformly mixing, plasticizing and extruding through a plastic extruding machine, shaping by using a mould with a required size, and cooling to obtain an inner layer pipe; the inner layer plasticizing raw material comprises the following raw materials in parts by weight: 100-150 parts of high-density polyethylene, 2-4 parts of color master batch, 2-6 parts of polyvinyl alcohol and 0.3-0.6 part of antioxidant;
s2 steel wire winding: coating adhesive resin glue on the surface of a first steel wire to form a first adhesive layer on the surface of the first steel wire, and preparing a first rubber wire; winding a first rubber wire on the surface of the inner-layer pipe, and then winding a second steel wire in a crossed manner, wherein the first rubber wire and the second steel wire form a steel wire mesh on the surface of the inner-layer pipe, so as to prepare a plain wire pipe;
s3 sizing: extruding the viscous resin adhesive on the surface of the plain fiber tube to form a second viscous layer on the surface of the plain fiber tube, and preparing an inner layer silk tube; the adhesive resin glue comprises the following raw materials in parts by weight: 15-25 parts of maleic anhydride modified HDPE binder and 0.5-2.5 parts of amino modified silicone oil;
s4 outer layer compounding: putting the inner layer wire tube into an outer layer polyethylene tube mould; weighing outer layer plasticized raw materials, uniformly mixing, plasticizing and extruding the mixture into an outer layer polyethylene pipe mold through a plastic extruding machine, forming a polyethylene outer layer on the surface of an inner layer wire pipe, cooling and shaping to obtain a steel wire mesh framework polyethylene composite pipe; the outer layer plasticizing raw material comprises the following raw materials in parts by weight: 100 portions of high-density polyethylene, 150 portions of color master batch, 2 to 4 portions of nano silicon dioxide, 1.5 to 4.5 portions of antioxidant and 0.1 to 0.4 portion of antioxidant.
By adopting the technical scheme, the inner-layer tube is formed by plasticizing and extruding the inner-layer plasticized raw material containing high-density polyethylene and polyvinyl alcohol, then the steel wire mesh is wound on the surface of the inner-layer tube, the viscous resin adhesive containing the amino modified silicone oil and the maleic anhydride modified HDPE binder is extruded to form the viscous layer, then the outer-layer plasticized raw material containing nano silicon dioxide is injected, and the polyethylene outer layer is formed outside the steel wire mesh. The nano silicon dioxide is added into the outer layer plasticizing raw material, so that the thermal expansion coefficient of the polyethylene outer layer is reduced, the volume change is reduced, the stress is reduced, and the cracks are reduced; the amino modified silicone oil is added into the viscous resin adhesive, so that the compatibility among the steel wire mesh, the inner layer plasticized raw material and the outer layer plasticized raw material is improved, and cracks are reduced; polyvinyl alcohol is added into the inner-layer plasticizing raw material, and the polyvinyl alcohol and the amino modified silicone oil are subjected to a cross-linking reaction, so that the bonding strength among the inner-layer pipe, the steel wire mesh and the polyethylene outer layer is improved, cracks are reduced, the mechanical property of the product is improved, and the service life of the product is prolonged.
Preferably, the inner layer plasticizing raw material comprises the following raw materials in parts by weight: 135 parts of high-density polyethylene 115-containing pigment, 2-4 parts of color master, 3.5-4.5 parts of polyvinyl alcohol and 0.3-0.6 part of antioxidant; the adhesive resin comprises the following raw materials in parts by weight: 18-22 parts of maleic anhydride modified HDPE (high-density polyethylene) binder and 1.2-1.8 parts of amino modified silicone oil; the outer layer plasticizing raw material comprises the following raw materials in parts by weight: 135 parts of high-density polyethylene 115-containing pigment, 2-4 parts of color master, 2.8-3.2 parts of nano silicon dioxide and 0.1-0.4 part of antioxidant.
By adopting the technical scheme, the better raw material feeding proportion is used, the composite effect among all layers of the product is favorably improved, the phenomenon of quick stress cracking of the product is favorably reduced, and the service life of the product is favorably prolonged.
Preferably, in the step S3, the plain fiber tube is preheated to 90-120 ℃, and the adhesive resin glue is extruded onto the surface of the plain fiber tube while the plain fiber tube is hot, so that a second adhesive layer is formed on the surface of the plain fiber tube, and the inner layer of the plain fiber tube is prepared.
Through adopting above-mentioned technical scheme, preheat the plain silk pipe, reduce the difference in temperature between plain silk pipe and the viscidity resin glue, viscidity resin glue adheres better on plain silk pipe, helps improving the product creep resistance ability, helps prolonging product life, is favorable to product marketing.
Preferably, the temperature of the adhesive resin glue is 120-150 ℃.
By adopting the technical scheme, the proper plasticizing extrusion temperature of the viscous resin adhesive is used, so that the viscous resin adhesive can be favorably adhered to the inner layer pipe and the polyethylene outer layer better, the composite effect is improved, the mechanical property of the product is improved, and the service life of the product is favorably prolonged.
Preferably, the thickness of the first adhesive layer is 40-80 μm, and the thickness of the second adhesive layer is 80-100 μm.
By adopting the technical scheme, the proper thickness of the viscous layer is selected, which is beneficial to improving the composite effect, improving the mechanical property of the product and prolonging the service life of the product.
Preferably, the antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite.
By adopting the technical scheme, the tris (2, 4-di-tert-butylphenyl) phosphite antioxidant is added, which is helpful for improving the oxidation resistance of the product, improving the stability of the product and prolonging the service life of the product.
Preferably, the outer layer plasticizing raw material also comprises 2.5 to 5.5 weight parts of sepiolite fibers.
By adopting the technical scheme, the sepiolite fibers are added into the outer-layer plasticizing raw material, the sepiolite fibers are a layer-chain magnesium silicate salt mineral, and the addition of the sepiolite fibers can reduce the expansion coefficient of the polyethylene outer layer, reduce stress and reduce cracks; on the other hand, the silicon hydroxyl groups on the sepiolite fiber structure react with the amino groups on the amino modified silicone oil, so that the composite effect between the polyethylene outer layer and the steel wire mesh is improved, the mechanical property of the product is improved, and the service life of the product is prolonged.
In a second aspect, the present application provides a composite pipe, which adopts the following technical scheme: a composite pipe is prepared by the production process of the steel wire mesh skeleton polyethylene composite pipe.
By adopting the technical scheme, the steel wire mesh framework polyethylene composite pipe produced by the method disclosed by the application is beneficial to prolonging the service life of the product and is beneficial to market popularization of the product.
In summary, the invention includes at least one of the following beneficial technical effects:
1. plasticizing and extruding an inner layer plasticizing raw material containing high-density polyethylene and polyvinyl alcohol to prepare an inner layer pipe, winding a steel wire mesh on the surface of the inner layer pipe, extruding a viscous resin adhesive containing amino modified silicone oil and maleic anhydride modified HDPE (high-density polyethylene) binder to form a viscous layer, and then injecting an outer layer plasticizing raw material containing nano silicon dioxide to form a polyethylene outer layer on the steel wire mesh; the nano silicon dioxide is added into the outer layer plasticizing raw material, so that the thermal expansion coefficient of the polyethylene outer layer is reduced, and cracks are reduced; the amino modified silicone oil is added into the viscous resin adhesive, so that the compatibility among the steel wire mesh, the inner layer plasticized raw material and the outer layer plasticized raw material is improved, and cracks are reduced; polyvinyl alcohol is added into the inner layer plasticizing raw material, and the polyvinyl alcohol and the amino modified silicone oil are subjected to a cross-linking reaction, so that the bonding strength among the inner layer pipe, the steel wire mesh and the polyethylene outer layer is improved, cracks are reduced, the mechanical property of the product is improved, and the service life of the product is prolonged; the nano silicon dioxide is added, the nano silicon dioxide has certain hardness and viscosity, the nano silicon dioxide, the polyvinyl alcohol and the amino modified silicone oil are beneficial to improving the sensitivity of the viscous resin adhesive to temperature and improving the stability of the viscous resin adhesive, and the product can be suitable for a wider temperature range, is beneficial to expanding the application range of the product and is beneficial to prolonging the service life of the product.
2. The method has the advantages that the raw silk tube is preheated, the thickness of the viscous layer is controlled, the injection molding temperature of the viscous resin adhesive is controlled, the impact resistance of the product is improved, and the service life of the product is prolonged;
3. the sepiolite fibers are added into an outer-layer plasticizing raw material, are layered chain magnesium silicate minerals, and can reduce the expansion coefficient of the polyethylene outer layer, reduce stress and reduce cracks; on the other hand, the reaction between the silicon hydroxyl groups on the sepiolite fiber structure and the amino groups on the amino modified silicone oil is beneficial to improving the composite effect between the polyethylene outer layer and the steel wire mesh, improving the mechanical property of the product, prolonging the service life of the product and being beneficial to the market popularization of the product.
Detailed Description
At present, the commonly used production process of the steel wire mesh framework polyethylene composite pipe is to wind steel wires on the surface of a polyethylene inner layer to form a steel wire mesh, and then to use polyethylene materials for high-temperature plasticizing extrusion to form a polyethylene outer layer outside the steel wire mesh. In view of the above-mentioned related technologies, the inventor believes that, because the difference between the expansion coefficients of polyethylene and the steel wire mesh framework layer is large, and the contraction coefficients of the two materials are different at different temperatures, microcracks are easily generated in the compounding process, which brings certain adverse effects to the mechanical properties of the steel wire mesh framework composite pipe and is not beneficial to prolonging the service life of the product. The method is characterized in that an inner-layer plasticized raw material containing high-density polyethylene and polyvinyl alcohol is plasticized and extruded to form an inner-layer pipe, a steel wire mesh is wound on the surface of the inner-layer pipe, a viscous resin adhesive containing amino modified silicone oil and maleic anhydride modified HDPE (high-density polyethylene) binder is extruded to form a viscous layer, an outer-layer plasticized raw material containing nano silicon dioxide is injected again, and a polyethylene outer layer is formed on the steel wire mesh. The nano silicon dioxide is added into the outer layer plasticizing raw material, so that the thermal expansion coefficient of the polyethylene outer layer is reduced, and cracks are reduced; the amino modified silicone oil is added into the viscous resin adhesive, so that the compatibility among the steel wire mesh, the inner layer plasticized raw material and the outer layer plasticized raw material is improved, and cracks are reduced; polyvinyl alcohol is added into the inner-layer plasticizing raw material, and the polyvinyl alcohol and the amino modified silicone oil are subjected to a cross-linking reaction, so that the bonding strength among the inner-layer pipe, the steel wire mesh and the polyethylene outer layer is improved, cracks are reduced, the mechanical property of the product is improved, and the service life of the product is prolonged. The nano silicon dioxide is added, the nano silicon dioxide has certain hardness and viscosity, the nano silicon dioxide, the polyvinyl alcohol and the amino modified silicone oil are beneficial to improving the sensitivity of the viscous resin adhesive to temperature and improving the stability of the viscous resin adhesive, and the product can be suitable for a wider temperature range, is beneficial to expanding the application range of the product and is beneficial to prolonging the service life of the product.
Examples
The raw materials related to the invention are all commercially available, and the types and sources of part of the raw materials are shown in table 1.
TABLE 1 Specification, type and origin of the raw materials
The steel wire used in the following examples was produced from Sichuan, and the same lot of raw material was used in each example. In actual production, the steel wire mesh framework polyethylene composite pipe is cut into required length according to requirements, and the end part needs to be sealed by a sealing ring after cutting.
Example 1: a production process of a steel wire mesh framework polyethylene composite pipe comprises the following steps:
s1 inner tube plasticizing: weighing 125kg of high-density polyethylene, adding 3kg of color master, 4kg of polyvinyl alcohol and 0.45kg of antioxidant, uniformly mixing, plasticizing at 198 ℃ through a screw extruder, extruding into a mold for shaping, and cooling to 30 ℃ to obtain the inner-layer tube.
S2 steel wire winding: 20kg of maleic anhydride modified HDPE binder and 1.5kg of amino modified silicone oil are uniformly mixed to prepare viscous resin adhesive, and the viscous resin adhesive is heated to 130 ℃. And (3) uniformly coating adhesive resin glue on the surface of the first steel wire by taking the first steel wire, and forming a first adhesive layer with the thickness of 60 mu m on the surface of the first steel wire to obtain the first rubber wire. And winding the first rubber wire on the surface of the inner-layer pipe, and then winding the second steel wire in a crossed manner, wherein the first rubber wire and the second steel wire form a steel wire mesh on the surface of the inner-layer pipe, so that the plain wire pipe is prepared. The steel wire diameter is 0.5mm, and the equidistant winding of steel wire, the interval of adjacent first steel wire is 8mm, and the interval of adjacent second steel wire is 8 mm.
S3 sizing: heating the plain silk tube to 110 ℃ for preheating for 15min, extruding 130 ℃ adhesive resin glue on the surface of the plain silk tube, and forming a second adhesive layer with the thickness of 90 mu m on the surface of the plain silk tube to obtain the inner layer silk tube.
S4 outer layer compounding: and putting the inner layer wire tube into an outer layer polyethylene tube mould. Weighing 125kg of high-density polyethylene, adding 3kg of color master, 3kg of nano-silica, 0.25kg of antioxidant and 4kg of sepiolite fibers, uniformly mixing, plasticizing and extruding the mixture into an outer-layer polyethylene pipe mold at 198 ℃ through an extruding machine, forming a polyethylene outer layer on the surface of an inner-layer wire pipe, cooling to 30 ℃ and shaping to obtain a plurality of steel wire mesh framework polyethylene composite pipes. The steel wire mesh skeleton polyethylene composite pipe has the nominal outer diameter of 110mm, the wall thickness of 7mm (the thickness of the inner layer and the outer layer is equivalent), the length of 6m and the nominal pressure of 1.6MPa, and the size of the steel wire mesh skeleton polyethylene composite pipe meets the standard of CJ/T189-2004 steel wire mesh skeleton plastic (polyethylene) composite pipes and pipe fittings.
Example 2
Example 2 differs from example 1 in that example 2 does not incorporate sepiolite fibers and otherwise remains the same as example 1.
Example 3
Example 3 is different from example 1 in that the plain fiber tube was not subjected to the preheating treatment in step S3 of example 3, and the others were the same as example 1.
Examples 4 to 11
Examples 4 to 11 differ from example 1 in that the amounts of the respective raw materials of examples 4 to 11 were different from each other and were identical to example 1, and the amounts of the respective raw materials of examples 4 to 11 were as shown in Table 2.
TABLE 2 addition amounts of the respective raw materials of examples 4 to 11
Examples 12 to 15
Examples 12-15 differ from example 1 in that the process parameters for each step of examples 12-15 are different and all of them are identical to example 1, and the process parameters for each step of examples 12-15 are shown in Table 3.
TABLE 3 parameters in the various steps of examples 12-15
Comparative example
Comparative example 1
Comparative example 1 differs from example 1 in that comparative example 1 does not have polyvinyl alcohol, amino-modified silicone oil, nano-silica, and sepiolite fibers added, all of which are consistent with example 1.
Comparative example 2
Comparative example 2 differs from comparative example 1 in that 4kg of polyvinyl alcohol was added to the inner layer plasticizing material of comparative example 2, and the rest was identical to comparative example 1.
Comparative example 3
Comparative example 3 is different from comparative example 1 in that 3kg of nano silica was added to the outer plasticized material of comparative example 3, and the rest was identical to comparative example 1.
Comparative example 4
Comparative example 4 is different from comparative example 1 in that 1.5kg of amino-modified silicone oil was added to the adhesive resin paste of comparative example 4, and the others were in agreement with comparative example 1.
Performance detection
1. Peel strength: the peel strength was measured and calculated in accordance with GB/T2791-1995 test method for T Peel Strength of adhesive to Flexible Material, and the results are shown in Table 4.
2. Thermal stability: a thermal stability test is carried out according to GB/T17391-1998 test method for thermal stability of polyethylene pipes and pipe fittings, the oxidation induction period under the oxygen atmosphere at 200 ℃ is recorded, and the test results are shown in Table 4.
Table 4 comparison table of product performance test results of polyethylene composite pipes with different steel wire mesh frameworks
Sample numbering Oxidation induction period (min) Peel strength (N/cm)
Example 1 53 342
Example 2 52 176
Example 3 55 265
Example 4 51 313
Example 5 49 309
Example 6 52 315
Example 7 55 307
Example 8 53 331
Example 9 51 326
Example 10 54 335
Example 11 52 328
Example 12 49 339
Example 13 50 343
Example 14 53 346
Example 15 54 341
Comparative example 1 24 123
Comparative example 2 26 132
Comparative example 3 27 145
Comparative example 4 31 138
Comparative example 1 does not add polyvinyl alcohol, amino modified silicone oil, nano silicon dioxide and sepiolite fiber, and the prepared steel wire mesh skeleton polyethylene composite pipe product has poor thermal stability, low peel strength and poor mechanical property, is not beneficial to prolonging the service life of the product and is not beneficial to market popularization of the product. Comparative example 2 on the basis of comparative example 1, polyvinyl alcohol is added to the inner layer plasticizing raw material, and amino modified silicone oil, nano silicon dioxide and sepiolite fibers are not added, so that the prepared steel wire mesh skeleton polyethylene composite pipe product is poor in thermal stability, peeling strength and mechanical property, and is not beneficial to prolonging the service life of the product. Comparative example 3 on the basis of comparative example 1, nano silicon dioxide is added into the outer-layer plasticizing raw material, and amino modified silicone oil, polyvinyl alcohol and sepiolite fibers are not added, so that the prepared steel wire mesh skeleton polyethylene composite pipe product is poor in thermal stability, peeling strength and mechanical property, and is not beneficial to prolonging the service life of the product. Comparative example 4 on the basis of comparative example 1, amino modified silicone oil is added into the viscous resin adhesive, and nano silicon dioxide, polyvinyl alcohol and sepiolite fibers are not added, so that the prepared steel wire mesh skeleton polyethylene composite pipe product is poor in thermal stability, peeling strength and mechanical property, is not beneficial to prolonging the service life of the product and is not beneficial to market popularization of the product.
Comparing the experimental results of the example 1 and the comparative examples 1 to 4, it can be seen that, in the process of preparing the steel wire mesh framework polyethylene composite pipe, polyvinyl alcohol is added into the inner layer plasticized raw material, amino modified silicone oil is added into the viscous resin adhesive, and nano silicon dioxide and sepiolite fibers are added into the outer layer plasticized raw material, so that the prepared steel wire mesh framework polyethylene composite pipe product has excellent thermal stability, high peel strength and good mechanical properties, is beneficial to prolonging the service life of the product, and is beneficial to market popularization of the product.
Comparing the experimental results of the example 1 and the example 2, the sepiolite fiber is not added in the example 2, and the mechanical property of the prepared steel wire mesh skeleton polyethylene composite pipe product is reduced, which is not beneficial to the market popularization of the product. Comparing the experimental results of example 1 and example 3, the plain fiber tube in step S3 of example 3 is not subjected to preheating treatment, and the mechanical properties of the prepared steel wire mesh skeleton polyethylene composite tube product are reduced, which is not favorable for prolonging the service life of the product and is not favorable for market promotion of the product.
Compared with the embodiment 1, the addition amounts of the raw materials in the embodiments 4 to 11 are different, the process parameters in the steps of the embodiments 12 to 15 are different, and the prepared steel wire mesh skeleton polyethylene composite pipe product is excellent in thermal stability, high in peel strength and good in mechanical property, is beneficial to prolonging the service life of the product, and is beneficial to market popularization of the product.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (8)

1. A production process of a steel wire mesh framework polyethylene composite pipe is characterized by comprising the following steps:
s1 inner tube plasticizing: weighing inner layer plasticized raw materials, uniformly mixing, plasticizing and extruding through a plastic extruding machine, shaping by using a mould with a required size, and cooling to obtain an inner layer pipe; the inner layer plasticizing raw material comprises the following raw materials in parts by weight: 100-150 parts of high-density polyethylene, 2-4 parts of color master batch, 2-6 parts of polyvinyl alcohol and 0.3-0.6 part of antioxidant;
s2 steel wire winding: coating adhesive resin glue on the surface of a first steel wire to form a first adhesive layer on the surface of the first steel wire, and preparing a first rubber wire; winding a first rubber wire on the surface of the inner-layer pipe, and then winding a second steel wire in a crossed manner, wherein the first rubber wire and the second steel wire form a steel wire mesh on the surface of the inner-layer pipe, so as to prepare a plain wire pipe;
s3 sizing: extruding the viscous resin adhesive on the surface of the plain fiber tube to form a second viscous layer on the surface of the plain fiber tube, and preparing an inner layer silk tube; the adhesive resin glue comprises the following raw materials in parts by weight: 15-25 parts of maleic anhydride modified HDPE binder and 0.5-2.5 parts of amino modified silicone oil;
s4 outer layer compounding: putting the inner layer wire tube into an outer layer polyethylene tube mould; weighing outer layer plasticized raw materials, uniformly mixing, plasticizing and extruding the mixture into an outer layer polyethylene pipe mold through a plastic extruding machine, forming a polyethylene outer layer on the surface of an inner layer wire pipe, cooling and shaping to obtain a steel wire mesh framework polyethylene composite pipe; the outer layer plasticizing raw material comprises the following raw materials in parts by weight: 100 portions of high-density polyethylene, 150 portions of color master batch, 2 to 4 portions of nano silicon dioxide, 1.5 to 4.5 portions of antioxidant and 0.1 to 0.4 portion of antioxidant.
2. The production process of the steel wire mesh framework polyethylene composite pipe as claimed in claim 1, wherein the inner layer plasticizing raw material comprises the following raw materials in parts by weight: 135 parts of high-density polyethylene 115-containing pigment, 2-4 parts of color master, 3.5-4.5 parts of polyvinyl alcohol and 0.3-0.6 part of antioxidant; the adhesive resin comprises the following raw materials in parts by weight: 18-22 parts of maleic anhydride modified HDPE (high-density polyethylene) binder and 1.2-1.8 parts of amino modified silicone oil; the outer layer plasticizing raw material comprises the following raw materials in parts by weight: 135 parts of high-density polyethylene 115-containing pigment, 2-4 parts of color master, 2.8-3.2 parts of nano silicon dioxide and 0.1-0.4 part of antioxidant.
3. The process for producing a steel wire mesh skeleton polyethylene composite pipe according to claim 1, wherein the step S3 is to preheat the plain fiber pipe to 90-120 ℃, and to extrude the adhesive resin glue onto the surface of the plain fiber pipe while the pipe is hot, so as to form a second adhesive layer on the surface of the plain fiber pipe, thereby obtaining the inner layer wire pipe.
4. The production process of the steel wire mesh skeleton polyethylene composite pipe according to claim 3, characterized in that: the temperature of the adhesive resin glue is 120-150 ℃.
5. The production process of the steel wire mesh skeleton polyethylene composite pipe according to claim 1, characterized in that: the thickness of the first adhesive layer is 40-80 μm, and the thickness of the second adhesive layer is 80-100 μm.
6. The production process of the steel wire mesh skeleton polyethylene composite pipe according to claim 1, characterized in that: the antioxidant is tris (2, 4-di-tert-butylphenyl) phosphite.
7. The production process of the steel wire mesh skeleton polyethylene composite pipe according to claim 1, characterized in that: the outer layer plasticizing raw material also comprises 2.5 to 5.5 weight parts of sepiolite fiber.
8. A composite pipe, characterized in that, the composite pipe is made by the production process of the steel wire mesh skeleton polyethylene composite pipe of any one of claims 1-7.
CN202011256371.8A 2020-11-11 2020-11-11 Production process of steel wire mesh framework polyethylene composite pipe and composite pipe prepared by production process Pending CN112477213A (en)

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