CN113175564A - Cross-linked PP-R pipe for cold and hot water and preparation method thereof - Google Patents
Cross-linked PP-R pipe for cold and hot water and preparation method thereof Download PDFInfo
- Publication number
- CN113175564A CN113175564A CN202110460068.8A CN202110460068A CN113175564A CN 113175564 A CN113175564 A CN 113175564A CN 202110460068 A CN202110460068 A CN 202110460068A CN 113175564 A CN113175564 A CN 113175564A
- Authority
- CN
- China
- Prior art keywords
- cross
- temperature
- master batch
- layer pipe
- cold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F16L9/12—Rigid pipes of plastics with or without reinforcement
- F16L9/133—Rigid pipes of plastics with or without reinforcement the walls consisting of two layers
-
- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
-
- 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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a cross-linked PP-R pipe for cold and hot water, which comprises an inner layer pipe and an outer layer pipe, wherein the inner layer pipe comprises the following raw material components: PP-R resin, a cross-linking agent, an antioxidant, chlorinated polyethylene, chlorinated polypropylene, an auxiliary cross-linking auxiliary agent and a first master batch; according to the technical scheme, the formula and the corresponding formula process are improved and innovated, so that the prepared cross-linked PP-R pipe for cold and hot water can improve the low-temperature brittleness of the pipe, improve the high-temperature pressure resistance, prolong the service life and meet the hot-melt connection requirement.
Description
Technical Field
The invention relates to the technical field of pipeline materials, in particular to a cross-linked PP-R pipe for cold and hot water and a preparation method thereof.
Background
The PP-R pipe is superior to light in weight, convenient to install and connect, small in inner wall smooth water flow resistance, corrosion-resistant, long in service life and easy to produce, and is used in mass in the current civil market, but due to the molecular structure, the brittleness is very obvious at 0 ℃, the pipe is careless during winter construction, is easy to damage and form dark injury, the probability of pipe explosion is very high during water supply, particularly, the maintenance of the hidden-coated pipe is very troublesome, if block polypropylene is added, although the toughness is improved, the hydraulic performance of cold and hot water is reduced, and the long-term hydrostatic performance requirement cannot be met, and the development of the pipe with the low-temperature brittleness resistance and the good cold and hot water hydraulic performance is imperative.
Disclosure of Invention
The invention provides a cross-linked PP-R pipe for cold and hot water and a preparation method thereof, which can effectively solve the problems.
The embodiment of the invention is realized by the following technical scheme:
the invention provides a cross-linked PP-R pipe for cold and hot water, which comprises an inner layer pipe and an outer layer pipe;
the inner layer pipe comprises the following raw material components: PP-R resin, a cross-linking agent, an antioxidant, chlorinated polyethylene, chlorinated polypropylene, an auxiliary cross-linking auxiliary agent and a first master batch.
The invention also provides a preparation method of the cross-linked PP-R pipe for cold and hot water, which comprises the following steps:
s1, mixing materials to respectively obtain an outer layer pipe material and an inner layer pipe material;
s2, feeding, namely respectively filling the outer layer pipe material and the inner layer pipe material into a double-screw extruder;
s3, forming, namely extruding and forming the outer layer pipe material and the inner layer pipe material through a co-extrusion die;
and S4, post-processing, including traction and cooling.
The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:
according to the technical scheme, the formula and the corresponding process are improved, so that the prepared cross-linked PP-R pipe for cold and hot water can improve the low-temperature brittleness, the high-temperature pressure resistance and the service life, and can meet the hot-melt connection requirement.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The specific embodiment provides a cross-linked PP-R pipe for cold and hot water, which comprises an inner layer pipe and an outer layer pipe;
the inner layer pipe comprises the following raw material components: PP-R resin, a cross-linking agent, an antioxidant, chlorinated polyethylene, chlorinated polypropylene, an auxiliary cross-linking auxiliary agent and a first master batch.
The PP-R resin is a polypropylene resin of three types, and is prepared by polymerizing PE in molecular chains of PP randomly and uniformly through an advanced gas-phase copolymerization process. The PP-R material is one of the pipe materials with the best comprehensive performance at present.
The Chlorinated Polyethylene (CPE) is a saturated high polymer material, is white powder in appearance, is nontoxic and tasteless, and has excellent weather resistance, ozone resistance, chemical resistance, aging resistance, oil resistance, flame retardance and coloring performance. Good toughness (flexibility at-30 ℃), good compatibility with other high polymer materials, high decomposition temperature, and capability of catalyzing dechlorination reaction of CPE by HCL generated by decomposition.
Wherein, the finished product of the chlorinated polypropylene CPP resin is white or yellowish. Water resistance, acid resistance, alkali resistance, no toxicity, no odor, high transparency, good film forming property and no flammability. Density: 0.93g/mL at 25 ℃ chlorine content (%). 32. + -. 1 viscosity (mpa). s: 200-: fineness of less than or equal to 0.06 (22 +/-1 ℃): <30 μm.
Further, by weight, 100 parts of PP-R resin, 0.05 part to 1.5 parts of cross-linking agent, 0.05 part to 0.5 part of antioxidant, 0.1 part to 10 parts of chlorinated polyethylene, 0.1 part to 5 parts of chlorinated polypropylene, 0.1 part to 30 parts of auxiliary cross-linking assistant and 1 part to 5 parts of first master batch are calculated.
Further, the crosslinking agent includes: dicumyl peroxide, benzoyl peroxide, di-tert-butyl peroxide, trimethylolpropane tris and a silane coupling agent ZQ-172 (vinyl-tris (2-methoxyethoxy) silane).
Further, the antioxidant comprises: one or more of antioxidant 1010, antioxidant 1076, and antioxidant 168.
Wherein the molecular formula of the antioxidant 1010 is as follows: c73H108O12；
The CBnumber of the antioxidant 1010 is as follows: CB 8489584;
the CAS number of antioxidant 1010 is: 6683-19-8.
Wherein, the molecular formula of the antioxidant 1076 is: c35H62O3；
The CBNumber of the antioxidant 1076 is: CB 5110719;
CAS number of antioxidant 1076 is: 2082-79-3.
Wherein the molecular formula of the antioxidant 168 is: c42H63O3P；
The CBnumber of the antioxidant 168 is: CB 5311800;
the CAS number for antioxidant 168 is: 31570-04-4.
Further, the auxiliary crosslinking assistant includes: one or more of ethylene-propylene copolymer, ethylene butene polymer and ethylene-octene copolymer.
Wherein the molecular formula of the ethylene-propylene copolymer is as follows: c15H30X2；
The CBNumber of the ethylene-propylene copolymer is: CB 4228497;
CAS number for ethylene-propylene copolymers is: 9010-79-1.
Wherein the molecular formula of the ethylene-butylene polymer is as follows: c6H12；
The CBNumber of the polymer of ethylene butene is: CB 21212372;
CAS number for polymers of ethylene butene: 9019-29-8.
Wherein, ethylene-octanThe olefin copolymer has the formula C10H20；
The CBNumber of the ethylene-octene copolymer is: CB 9441088;
CAS number for ethylene-octene copolymers is: 26221-73-8.
Further, the first masterbatch is: any one of white master batch, gray master batch, golden master batch, blue master batch and green master batch.
Further, the raw material components of the outer layer pipe comprise: a PP-R resin, an ultraviolet absorber and a second master batch;
wherein, the PP-R resin accounts for 100 weight portions, the ultraviolet absorbent accounts for 0.01 weight portion to 2 weight portions, and the second master batch accounts for 1 weight portion to 5 weight portions.
Wherein the ultraviolet absorber includes: one or more of ultraviolet absorber UV-531, ultraviolet absorber UV-320, ultraviolet absorber UV-327 and ultraviolet absorber UV-328;
wherein, the molecular formula of the ultraviolet absorbent UV-531 is as follows: c21H26O3；
The CBnumber of the ultraviolet absorber UV-531 is: CB 0441308;
ultraviolet absorber UV-531 CAS number: 1843-05-6.
Wherein, the molecular formula of the ultraviolet absorbent UV-320 is as follows: c20H25N3O；
The UV absorber UV-320 has a CBnumber of: CB 4154994;
ultraviolet absorber UV-320 has the CAS number: 3846-71-7.
Wherein, the molecular formula of the ultraviolet absorbent UV-327 is as follows: c20H24ClN3O；
The CBnumber of the ultraviolet absorber UV-327 is: CB 5142606;
the CAS number for the ultraviolet absorber UV-327 is: 3864-99-1.
Wherein, the molecular formula of the ultraviolet absorbent UV-328 is as follows: c22H29N3O；
The UV-328 ultraviolet absorber has a CBnumber of: CB 4460527;
ultraviolet absorber UV-328 has the CAS number: 21615-49-6.
Wherein the second masterbatch is: any one of white master batch, gray master batch, golden master batch, blue master batch and green master batch.
In another aspect, the present invention provides a method for preparing the cross-linked PP-R tubing for cold and hot water, including the following steps:
s1, mixing materials to respectively obtain an outer layer pipe material and an inner layer pipe material;
s2, feeding, namely respectively filling the outer layer pipe material and the inner layer pipe material into a double-screw extruder;
s3, forming, namely extruding and forming the outer layer pipe material and the inner layer pipe material through a co-extrusion die;
and S4, post-processing, including traction and cooling.
Further, in step S1, when the outer layer tube materials are mixed, the materials are weighed according to the formulation, stirred in a low speed stirrer for 4-15 minutes, the stirring temperature is controlled below 80 ℃, and then cooled and bagged for standby.
Further, in step S1, when the inner layer tube material is mixed, the material is weighed according to the formulation, stirred in a low speed stirrer for 4-15 minutes, the stirring temperature is controlled below 80 ℃, cooled and bagged for standby.
Further, in step S2, in the twin-screw extruder, the rotation speed of the inner layer main machine screw is 10-30 rpm, and the rotation speed of the outer layer main machine screw is 8-28 rpm.
Further, in step S2, the twin-screw extruder includes 6 segments of barrels and one segment of connectors, the temperature of the segment of barrel 1 is 120 ℃ to 165 ℃, the temperature of the segment of barrel 2 is 170 ℃ to 195 ℃, the temperature of the segment of barrel 3 is 185 ℃ to 195 ℃, the temperature of the segment of barrel 4 is 190 ℃ to 200 ℃, the temperature of the segment of barrel 5 is 200 ℃ to 210 ℃, the temperature of the segment of barrel 6 is 200 ℃ to 215 ℃, and the temperature of the connectors is 180 ℃ to 190 ℃.
Further, in step S3, the co-extrusion die comprises 3 segments of dies and a segment of die, wherein the temperature of the die 1 segment is 180 ℃ to 205 ℃, the temperature of the die 2 segment is 190 ℃ to 215 ℃, the temperature of the die 3 segment is 195 ℃ to 220 ℃, and the temperature of the die is 200 ℃ to 260 ℃.
Further, in step S4, the drawing speed is 1-30 m/min, and the vacuum degree of the water tank for cooling is 0.02-0.08 MPa.
If the pipe is connected with the pipe fitting, the pipe fitting is connected by adopting a non-welding fast-assembling pipe fitting or a clamping and pressing type pipe fitting, and the outer layer of the pipe can be processed by adopting an inner layer formula.
Example 1
S1, mixing to obtain an outer layer pipe material and an inner layer pipe material respectively
Aiming at the inner layer pipe material:
the formula comprises 100 parts by weight of PP-R resin, 0.1 part by weight of dicumyl peroxide, 0.3 part by weight of antioxidant 168, 5 parts by weight of chlorinated polyethylene, 3 parts by weight of chlorinated polypropylene, 10 parts by weight of ethylene-propylene copolymer and 2.5 parts by weight of gray master batch;
the inner layer tube material is obtained by weighing and mixing the components according to the formula, stirring the mixture in a stirrer for 8 minutes at the temperature of 70 ℃, uniformly cooling the mixture to 38 ℃ and bagging the mixture.
Aiming at the outer layer pipe material:
the formula comprises 100 parts by weight of PP-R resin, 0.3 part by weight of ultraviolet absorbent UV-531 and 2 parts by weight of white master batch;
the materials are weighed and mixed according to the formula, stirred in a stirrer for 8 minutes at the temperature of 70 ℃, cooled to 38 ℃ after being uniformly stirred, and bagged to obtain the outer-layer tube material.
S2, feeding, namely respectively filling the outer layer pipe material and the inner layer pipe material into a double-screw extruder
In the twin-screw extruder, the rotation speed of the inner layer main machine screw is 20 revolutions per minute, and the rotation speed of the outer layer main machine screw is 20 revolutions per minute.
The double-screw extruder comprises 6 sections of machine barrels and one section of connecting body, wherein the temperature of the section 1 of the machine barrel is 130 ℃, the temperature of the section 2 of the machine barrel is 180 ℃, the temperature of the section 3 of the machine barrel is 190 ℃, the temperature of the section 4 of the machine barrel is 195 ℃, the temperature of the section 5 of the machine barrel is 205 ℃, the temperature of the section 6 of the machine barrel is 210 ℃, and the temperature of the connecting body is 185 ℃.
S3, forming, namely extruding and forming the outer layer pipe material and the inner layer pipe material through a co-extrusion die
The co-extrusion die comprises 3 sections of dies and a section of neck ring die, wherein the temperature of the 1 section of the die is 190 ℃, the temperature of the 2 section of the die is 200 ℃, the temperature of the 3 section of the die is 205 ℃, and the temperature of the neck ring die is 230 ℃.
S4 post-treatment including drawing and cooling
The drawing speed was 10 m/min, and the vacuum degree of the water tank for cooling was 0.05 MPa.
The cross-linked PP-R pipe A1 for cold and hot water with the pipe specification dn 20x2.8mm, the outer layer thickness of 1.2mm and the inner layer thickness of 1.6mm is prepared.
Example 2
S1, mixing to obtain an outer layer pipe material and an inner layer pipe material respectively
Aiming at the inner layer pipe material:
the formula comprises 100 weight parts of PP-R resin, 0.05 weight part of dicumyl peroxide, 0.05 weight part of antioxidant 168, 0.1 weight part of chlorinated polyethylene, 0.1 weight part of chlorinated polypropylene, 0.1 weight part of ethylene-propylene copolymer and 1 weight part of gray master batch;
the inner layer tube material is obtained by weighing and mixing the components according to the formula, stirring the mixture in a stirrer for 8 minutes at the temperature of 70 ℃, uniformly cooling the mixture to 38 ℃ and bagging the mixture.
Aiming at the outer layer pipe material:
the formula comprises 100 parts by weight of PP-R resin, 0.01 part by weight of ultraviolet absorbent UV-531 and 1 part by weight of white master batch;
the materials are weighed and mixed according to the formula, stirred in a stirrer for 4 minutes at the temperature of 70 ℃, cooled to 38 ℃ after being uniformly stirred, and bagged to obtain the outer-layer tube material.
S2, feeding, namely respectively filling the outer layer pipe material and the inner layer pipe material into a double-screw extruder
In the twin-screw extruder, the rotation speed of the inner layer main machine screw is 10 revolutions per minute, and the rotation speed of the outer layer main machine screw is 8 revolutions per minute.
The double-screw extruder comprises 6 sections of machine barrels and one section of connecting body, wherein the temperature of the section 1 of the machine barrel is 120 ℃, the temperature of the section 2 of the machine barrel is 170 ℃, the temperature of the section 3 of the machine barrel is 185 ℃, the temperature of the section 4 of the machine barrel is 190 ℃, the temperature of the section 5 of the machine barrel is 200 ℃, the temperature of the section 6 of the machine barrel is 200 ℃, and the temperature of the connecting body is 180 ℃.
S3, forming, namely extruding and forming the outer layer pipe material and the inner layer pipe material through a co-extrusion die
The co-extrusion die comprises 3 sections of dies and a section of neck ring die, wherein the temperature of the 1 section of the die is 180 ℃, the temperature of the 2 section of the die is 190 ℃, the temperature of the 3 section of the die is 195 ℃, and the temperature of the neck ring die is 200 ℃.
S4 post-treatment including drawing and cooling
The drawing speed was 1 m/min, and the vacuum degree of the water tank for cooling was 0.02 MPa.
The cross-linked PP-R pipe A2 for cold and hot water with the pipe specification dn 20x2.8mm, the outer layer thickness of 1.2mm and the inner layer thickness of 1.6mm is prepared.
Example 3
S1, mixing to obtain an outer layer pipe material and an inner layer pipe material respectively
Aiming at the inner layer pipe material:
the formula comprises 100 parts by weight of PP-R resin, 1.5 parts by weight of dicumyl peroxide, 0.5 part by weight of antioxidant 168, 10 parts by weight of chlorinated polyethylene, 5 parts by weight of chlorinated polypropylene, 30 parts by weight of ethylene-propylene copolymer and 5 parts by weight of gray master batch;
the inner layer tube material is obtained by weighing and mixing the components according to the formula, stirring the mixture in a stirrer for 15 minutes at the temperature of 70 ℃, uniformly cooling the mixture to 38 ℃ and bagging the mixture.
Aiming at the outer layer pipe material:
the formula comprises 100 parts by weight of PP-R resin, 2 parts by weight of ultraviolet absorbent UV-531 and 5 parts by weight of white master batch;
the materials are weighed and mixed according to the formula, stirred in a stirrer for 15 minutes at the temperature of 70 ℃, cooled to 38 ℃ after being uniformly stirred, and bagged to obtain the outer-layer tube material.
S2, feeding, namely respectively filling the outer layer pipe material and the inner layer pipe material into a double-screw extruder
In the twin-screw extruder, the rotation speed of the inner layer main screw was 30 rpm, and the rotation speed of the outer layer main screw was 28 rpm.
The double-screw extruder comprises 6 sections of machine barrels and one section of connecting body, wherein the temperature of the section 1 of the machine barrel is 165 ℃, the temperature of the section 2 of the machine barrel is 195 ℃, the temperature of the section 3 of the machine barrel is 195 ℃, the temperature of the section 4 of the machine barrel is 200 ℃, the temperature of the section 5 of the machine barrel is 210 ℃, the temperature of the section 6 of the machine barrel is 215 ℃, and the temperature of the connecting body is 190 ℃.
S3, forming, namely extruding and forming the outer layer pipe material and the inner layer pipe material through a co-extrusion die
The co-extrusion die comprises a 3-section die and a section of neck ring die, wherein the temperature of the 1-section die is 205 ℃, the temperature of the 2-section die is 215 ℃, the temperature of the 3-section die is 220 ℃, and the temperature of the neck ring die is 260 ℃.
S4 post-treatment including drawing and cooling
The drawing speed was 30 m/min, and the vacuum degree of the water tank for cooling was 0.08 MPa.
The cross-linked PP-R pipe A3 for cold and hot water with the pipe specification dn 20x2.8mm, the outer layer thickness of 1.2mm and the inner layer thickness of 1.6mm is prepared.
Comparative example 1
PP-R pipe, purchased from Sichuan Union pipe Co., Ltd, was used as a commercial control D1 pipe.
Comparative example 2
The remaining characteristics are identical to those of example 1, except that no ethylene-propylene copolymer is added, giving finally a pipe D2.
Comparative example 3
The remaining characteristics were the same as in example 1, except that chlorinated polyethylene and chlorinated polypropylene were not added, and finally a pipe D3 was obtained.
Comparative example 4
The remaining characteristics were the same as in example 1, except that the ethylene-propylene copolymer was added in an amount of 50 parts by weight, and that a pipe D4 was finally obtained.
Comparative example 5
The other characteristics were the same as in example 1 except that the amount of chlorinated polyethylene added was 15 parts by weight and the amount of chlorinated polypropylene added was 10 parts by weight, and finally, a pipe D5 was obtained.
Comparative example 6
The remaining characteristics were identical to those of example 1, except that the barrel of the extruder was not sectioned, the temperature of the barrel was 190 ℃ and finally a tube D6 was obtained.
Comparative example 7
The remaining characteristics were the same as in example 1, except that the coextrusion die was not segmented and the temperature of the coextrusion die was 190 ℃ to finally obtain a tube D7.
Examples of the experiments
The cross-linked PP-R pipes A1-A3 and D1-D7 for cold and hot water were subjected to a plain beam impact test, a drop weight impact test and a hydrostatic test, respectively, and the test results are shown in Table 1.
The method for the impact test of the simply supported beam comprises the following steps: the test is carried out according to the regulation of GB/T18743 impact test method for the thermoplastic plastic pipe for fluid transportation.
The method for the drop hammer impact test comprises the following steps: the test was carried out according to the regulations of GB/T14153 general rules for the drop hammer impact test method of rigid plastics.
The hydrostatic test method comprises the following steps: the test is carried out according to the regulation of GB/T6111 method for measuring the breakage resistance time of the thermoplastic plastic pipe under the constant internal pressure for a long time.
TABLE 1 test results for pipes
As can be seen from Table 1, the cross-linked PP-R pipe material A1-A3 for cold and hot water, which is prepared according to the technical scheme, has good performance in a simple beam impact test, a drop hammer impact test and a hydrostatic test, and shows that the cross-linked PP-R pipe material has excellent low-temperature brittleness and good high-temperature pressure resistance.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A cross-linked PP-R pipe for cold and hot water is characterized by comprising an inner layer pipe and an outer layer pipe;
the inner layer pipe comprises the following raw material components: PP-R resin, a cross-linking agent, an antioxidant, chlorinated polyethylene, chlorinated polypropylene, an auxiliary cross-linking auxiliary agent and a first master batch.
2. The cross-linked PP-R pipe material for cold and hot water as claimed in claim 1, wherein the PP-R resin is 100 parts by weight, the cross-linking agent is 0.05 to 1.5 parts by weight, the antioxidant is 0.05 to 0.5 parts by weight, the chlorinated polyethylene is 0.1 to 10 parts by weight, the chlorinated polypropylene is 0.1 to 5 parts by weight, the auxiliary cross-linking assistant is 0.1 to 30 parts by weight, and the first master batch is 1 to 5 parts by weight.
3. The cross-linked PP-R tubing for hot and cold water according to claim 1, wherein the cross-linking agent comprises: one or more of dicumyl peroxide, benzoyl peroxide, di-tert-butyl peroxide, trimethylolpropane tri and a silane coupling agent ZQ-172.
4. The cross-linked PP-R tubing for cold and hot water according to claim 1, wherein the antioxidant comprises: one or more of antioxidant 1010, antioxidant 1076, and antioxidant 168.
5. The cross-linked PP-R tubing for cold and hot water according to claim 1, wherein the auxiliary cross-linking aid comprises: one or more of ethylene-propylene copolymer, ethylene butylene polymer, ethylene-octene copolymer and block copolymerization polypropylene.
6. The cross-linked PP-R tubing for cold and hot water according to claim 1, wherein the first masterbatch is: any one of white master batch, gray master batch, golden master batch, blue master batch and green master batch.
7. The cross-linked PP-R pipe material for cold and hot water as claimed in claim 1, wherein the outer layer pipe comprises the following raw material components: a PP-R resin, an ultraviolet absorber and a second master batch;
wherein the ultraviolet absorber includes: one or more of ultraviolet absorber UV-531, ultraviolet absorber UV-320, ultraviolet absorber UV-327 and ultraviolet absorber UV-328;
wherein the second masterbatch is: any one of white master batch, gray master batch, golden master batch, blue master batch and green master batch.
8. A method for manufacturing a cross-linked PP-R tube for cold and hot water according to any of claims 1 to 7, comprising the steps of:
s1, mixing materials to respectively obtain an outer layer pipe material and an inner layer pipe material;
s2, feeding, namely respectively filling the outer layer pipe material and the inner layer pipe material into a double-screw extruder;
s3, forming, namely extruding and forming the outer layer pipe material and the inner layer pipe material through a co-extrusion die;
and S4, post-processing, including traction and cooling.
9. The method of claim 8, wherein the twin-screw extruder comprises 6 barrel sections and a connecting body section, the temperature of barrel section 1 is 120-165 ℃, the temperature of barrel section 2 is 170-195 ℃, the temperature of barrel section 3 is 185-195 ℃, the temperature of barrel section 4 is 190-200 ℃, the temperature of barrel section 5 is 200-210 ℃, the temperature of barrel section 6 is 200-215 ℃, and the temperature of the connecting body section is 180-190 ℃ in step S2.
10. The method of claim 8, wherein the co-extrusion mold comprises a 3-stage mold and a die, the temperature of the mold 1 is 180-205 ℃, the temperature of the mold 2 is 190-215 ℃, the temperature of the mold 3 is 195-220 ℃, and the temperature of the die is 200-260 ℃ in step S3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110460068.8A CN113175564A (en) | 2021-04-27 | 2021-04-27 | Cross-linked PP-R pipe for cold and hot water and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110460068.8A CN113175564A (en) | 2021-04-27 | 2021-04-27 | Cross-linked PP-R pipe for cold and hot water and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113175564A true CN113175564A (en) | 2021-07-27 |
Family
ID=76926684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110460068.8A Pending CN113175564A (en) | 2021-04-27 | 2021-04-27 | Cross-linked PP-R pipe for cold and hot water and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113175564A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576436A (en) * | 2022-04-12 | 2022-06-03 | 公元管道(天津)有限公司 | Impact-resistant PP-R cold and hot water pipe and production method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148530A (en) * | 2007-09-04 | 2008-03-26 | 广州市合诚化学有限公司 | Special-purpose multifunctional modified random polypropylene material for pipe and its preparing process and application |
| CN102966801A (en) * | 2012-11-02 | 2013-03-13 | 宏岳塑胶集团有限公司 | Method for preparing high-strength heat-resistant and cold-resistant modified polypropylene pipe |
| CN104387680A (en) * | 2014-12-04 | 2015-03-04 | 联塑科技发展(贵阳)有限公司 | High-impact-resistance PP-R tubular product and preparation method thereof |
| CN105778296A (en) * | 2016-03-17 | 2016-07-20 | 海南联塑科技实业有限公司 | Cold-resistant PP-R (polypropylene random) pipe and preparation method thereof |
| CN109021405A (en) * | 2018-05-31 | 2018-12-18 | 广东联塑科技实业有限公司 | A kind of PPR pipe and its preparation method and application of high intensity high/low temperature toughness |
| CN111690206A (en) * | 2020-07-18 | 2020-09-22 | 万华化学（宁波）有限公司 | Polar polypropylene composite material and preparation method thereof |
-
2021
- 2021-04-27 CN CN202110460068.8A patent/CN113175564A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148530A (en) * | 2007-09-04 | 2008-03-26 | 广州市合诚化学有限公司 | Special-purpose multifunctional modified random polypropylene material for pipe and its preparing process and application |
| CN102966801A (en) * | 2012-11-02 | 2013-03-13 | 宏岳塑胶集团有限公司 | Method for preparing high-strength heat-resistant and cold-resistant modified polypropylene pipe |
| CN104387680A (en) * | 2014-12-04 | 2015-03-04 | 联塑科技发展(贵阳)有限公司 | High-impact-resistance PP-R tubular product and preparation method thereof |
| CN105778296A (en) * | 2016-03-17 | 2016-07-20 | 海南联塑科技实业有限公司 | Cold-resistant PP-R (polypropylene random) pipe and preparation method thereof |
| CN109021405A (en) * | 2018-05-31 | 2018-12-18 | 广东联塑科技实业有限公司 | A kind of PPR pipe and its preparation method and application of high intensity high/low temperature toughness |
| CN111690206A (en) * | 2020-07-18 | 2020-09-22 | 万华化学（宁波）有限公司 | Polar polypropylene composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 周祥兴 主编: "《中国塑料制品配方大全》", 31 May 1999, 中国物资出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576436A (en) * | 2022-04-12 | 2022-06-03 | 公元管道(天津)有限公司 | Impact-resistant PP-R cold and hot water pipe and production method thereof |
| CN114576436B (en) * | 2022-04-12 | 2023-09-05 | 公元管道(天津)有限公司 | Impact-resistant PP-R cold and hot water pipe and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8968851B2 (en) | Peroxide crosslinked ethylene polymer pressure pipe and a method for the preparation thereof | |
| CN1068356C (en) | Linear low density polyethylene based compositions with improved optics | |
| AU2001263798B2 (en) | Polymer composition for pipes | |
| EP1753812B1 (en) | Polyethylene pipe fitting resins | |
| US20120148775A1 (en) | Ethylene polymer composition | |
| CN102002191B (en) | PPR/EVOH/POE (Pentatricopeptide Repeats/Ethylene-Vinyl Alcohol/Polyolefin Elastomer) blending high-impact barrier pipe and manufacturing method thereof | |
| CN101374904A (en) | Molded composite material and process for production thereof | |
| SG177446A1 (en) | Ethylenic polymer and its use | |
| CN103980621A (en) | High-performance dynamic vulcanization thermoplastic elastomer and preparation method thereof | |
| SG178222A1 (en) | Ethylenic polymer and its use | |
| AU2007241921A1 (en) | Molded article and method for production thereof | |
| KR20120023107A (en) | Polymer composition for crosslinked pipes | |
| US5643997A (en) | Polyethylenic resin composition | |
| CN106317585A (en) | Heat-resistant polyethylene resin composition and application thereof | |
| CN101824180B (en) | High elasticity polyolefin hose with radiation crosslinking and preparation method thereof | |
| CN113175564A (en) | Cross-linked PP-R pipe for cold and hot water and preparation method thereof | |
| EP2602281B1 (en) | Increased output of a film extrusion process | |
| CN105733023B (en) | High density polyethylene (HDPE) pressure resistant pipe material composite assistant and preparation method thereof and the resin raw material containing the composite assistant | |
| JPH08500385A (en) | Hose composition | |
| CN109679243B (en) | Heat-resistant corrosion-resistant polyvinyl chloride water supply and drainage pipe and preparation method thereof | |
| US20160200909A1 (en) | A Composition, Articles Made Therefrom, and Method of Making the Articles | |
| CN104371174A (en) | Acid-corrosion-resistant medical alloy material and preparation method thereof | |
| EP0495996B1 (en) | Polyethylene resin composition | |
| CN113337026A (en) | Preparation process of corrosion-resistant PE drain pipe | |
| EP0450982B1 (en) | Method of producing modified polyolefin |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210727 |