CN110978704A - High-toughness PPR (polypropylene random copolymer) pipe and preparation method thereof - Google Patents

High-toughness PPR (polypropylene random copolymer) pipe and preparation method thereof Download PDF

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CN110978704A
CN110978704A CN201911279459.9A CN201911279459A CN110978704A CN 110978704 A CN110978704 A CN 110978704A CN 201911279459 A CN201911279459 A CN 201911279459A CN 110978704 A CN110978704 A CN 110978704A
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parts
ppr
resistant layer
pipe
layer
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邓权
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Deng Quan Plastic Technology Hunan Co ltd
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Deng Quan Plastic Technology Hunan Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • 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
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    • C08K7/00—Use of ingredients characterised by shape
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    • 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
    • C08L23/12—Polypropene
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    • 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
    • C08L23/142—Copolymers of propene at least partially crystalline copolymers of propene with other olefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/14—Copolymers of polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/554—Wear resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/712—Weather resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B2323/10—Polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes
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    • C—CHEMISTRY; METALLURGY
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  • Rigid Pipes And Flexible Pipes (AREA)
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Abstract

The invention provides a high-toughness PPR (polypropylene random copolymer) pipe and a preparation method thereof, and relates to the technical field of PPR pipes.

Description

High-toughness PPR (polypropylene random copolymer) pipe and preparation method thereof
Technical Field
The invention relates to the technical field of PPR (polypropylene random copolymer) pipes, in particular to a high-toughness PPR pipe and a preparation method thereof.
Background
The PPR, also called as polypropylene random copolymer, has good toughness, high strength, excellent processing performance and the special advantage of high transparency of polypropylene random copolymer, and can be widely used for producing pipes, sheets, daily necessities, packaging materials, household appliance parts and various films. The pipe made of PPR has the advantages of sanitation, no toxicity, energy conservation, environmental protection, heat resistance, no scaling, no leakage and the like.
However, the PPR pipe is easy to become brittle below 0 ℃, which not only brings great inconvenience to transportation and construction, but also is easy to generate some imperceptible damage, and finally the PPR pipe is likely to burst after being installed and filled with water, thereby limiting the application of the PPR pipe to a certain extent; the PPR material in the current market has lower impact strength, and although the traditional toughening modification method can improve the toughness of the PPR material to a certain extent and enhance the impact strength, other indexes of the PPR material usually do not meet the national standard requirements of the new edition and are difficult to balance. Meanwhile, the existing PPR pipe is not good in wear resistance, the pipe is broken due to inevitable friction generated in long-time outdoor work, the pipe needs to be replaced regularly, the service life of the pipe is shortened, and the maintenance cost of enterprises is increased.
Disclosure of Invention
The invention aims to provide a high-toughness PPR pipe to solve the technical problem.
In order to solve the technical problems, the invention adopts the following technical scheme: a high-toughness PPR pipe comprises a PPR base pipe, wherein a high-toughness layer is arranged on the outer side of the PPR base pipe, a cold-resistant layer is arranged on the outer side of the high-toughness layer, and a wear-resistant layer is arranged on the outer side of the cold-resistant layer;
the PPR base tube is composed of the following raw materials in parts by mass: 130 parts of PPR resin, 3-8 parts of nucleating agent master batch, 15-30 parts of temperature-resistant stiffening master batch, 8-12 parts of glass fiber, 15-22 parts of carbon fiber, 2-8 parts of graphite and 1-3 parts of coupling agent;
the cold-resistant layer comprises, by mass, 20-30 parts of PPR resin, 3-5 parts of β nucleating agent, 3-5 parts of ultra-high molecular weight polyethylene and 5-8 parts of antioxidant;
the wear-resistant layer is composed of the following raw materials in parts by mass: 25-30 parts of polypropylene, 10-15 parts of polyethylene, 2-5 parts of zinc stearate, 1-2 parts of graphene, 5-10 parts of polyolefin resin and 2-5 parts of superfine mica sheets;
the high-toughness layer is composed of the following raw materials in parts by mass: 20-30 parts of PPR resin, 1-3 parts of coupling agent, 1-5 parts of dispersing agent and 3-5 parts of antioxidant.
Preferably, the coupling agent is selected from at least one of a silane coupling agent, a titanate coupling agent, and a chromium complex coupling agent.
Preferably, the antioxidant is at least one selected from the group consisting of antioxidant 1010, antioxidant 1790, and antioxidant 168.
A preparation method of a high-toughness PPR pipe is characterized by comprising the following steps:
A. manufacturing a PPR base pipe: uniformly stirring PPR resin, nucleating agent master batches and high-temperature-resistant stiffening master batches selected according to the proportion in a stirrer, and drying to obtain a mixture;
B. putting the mixture obtained in the step A into an extruder for extrusion to obtain a PPR base pipe;
C. preparing a high-toughness layer: drying the PPR resin, the coupling agent, the dispersing agent and the antioxidant which are selected according to the proportion, heating and melting, and then hot-pressing and extruding the high-toughness layer;
D. primary pressurization: uniformly hot-pressing and coating the prepared high-toughness layer on the outer surface of the prepared PPR base pipe to obtain a primary pipeline for later use;
E. preparing a cold-resistant layer, namely drying and then extruding and molding PPR resin, β nucleating agent, ultrahigh molecular weight polyethylene and antioxidant which are selected according to the proportion to obtain the cold-resistant layer;
F. secondary pressurization: uniformly hot-pressing and coating the prepared cold-resistant layer on the outer surface of the primary pipeline to obtain a secondary pipeline for later use;
G. preparing a wear-resistant layer: drying polypropylene, polyethylene, zinc stearate, graphene, polyolefin resin and superfine mica sheets, heating and melting, and hot-pressing to extrude out the wear-resistant layer;
H. and (3) pressurizing for three times: and uniformly hot-pressing and coating the prepared wear-resistant layer on the outer surface of the secondary pipeline to obtain the final finished product PPR pipe.
Preferably, the temperature of the barrel of the extruder is controlled to be 160-.
Preferably, the thickness of the cold-resistant layer and the thickness of the wear-resistant layer are both 0.3mm to 0.5mm, and the thickness of the high-toughness layer is 0.8 mm to 1.2 mm.
Preferably, the surface of the wear-resistant layer is sprayed with a paint layer.
The invention has the beneficial effects that:
the PPR pipe has high toughness, low cost and simple preparation process, is convenient for large-scale industrial production, and has high toughness and enhanced cold resistance and wear resistance through the mutual matching of the cold-resistant layer, the wear-resistant layer and the high-toughness layer, so that the performance and quality stability of the PPR pipe can be integrally improved.
Drawings
FIG. 1 is a schematic cross-sectional view of a high tenacity PPR pipe of the present invention;
reference numerals: 1-PPR base tube; 2-a high toughness layer; 3-cold resistant layer; 4-wear resistant layer.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood, the invention is further described below with reference to the specific embodiments and the attached drawings, but the following embodiments are only the preferred embodiments of the invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.
Specific embodiments of the present invention are described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the high-toughness PPR pipe comprises a PPR base pipe 1, wherein a high-toughness layer 2 is arranged on the outer side of the PPR base pipe 1, a cold-resistant layer 3 is arranged on the outer side of the high-toughness layer 2, and a wear-resistant layer 4 is arranged on the outer side of the cold-resistant layer 3;
the PPR base tube 1 is composed of the following raw materials in parts by mass: 100 parts of PPR resin, 3 parts of nucleating agent master batch, 15 parts of temperature-resistant stiffening master batch, 8 parts of glass fiber, 15 parts of carbon fiber, 2 parts of graphite and 1 part of coupling agent;
the cold-resistant layer 3 is composed of the following raw materials, by mass, 20 parts of PPR resin, 3 parts of β nucleating agent, 3 parts of ultra-high molecular weight polyethylene and 5 parts of antioxidant;
the wear-resistant layer 4 is composed of the following raw materials in parts by mass: 25 parts of polypropylene, 10 parts of polyethylene, 2 parts of zinc stearate, 1 part of graphene, 5 parts of polyolefin resin and 2 parts of superfine mica sheets;
the high-toughness layer 2 is composed of the following raw materials in parts by mass: 20 parts of PPR resin, 1 part of coupling agent, 1 part of dispersing agent and 3 parts of antioxidant.
A preparation method of a high-toughness PPR pipe is characterized by comprising the following steps:
A. manufacturing a PPR base pipe 1: uniformly stirring PPR resin, nucleating agent master batches and high-temperature-resistant stiffening master batches selected according to the proportion in a stirrer, and drying to obtain a mixture;
B. putting the mixture obtained in the step A into an extruder for extrusion to obtain a PPR base pipe 1;
C. preparation of high-toughness layer 2: drying the PPR resin, the coupling agent, the dispersing agent and the antioxidant which are selected according to the proportion, heating and melting, and then hot-pressing and extruding the high-toughness layer 2;
D. primary pressurization: the prepared high-toughness layer 2 is uniformly hot-pressed and coated on the outer surface of the prepared PPR base pipe 1 to obtain a primary pipeline for later use;
E. preparing a cold-resistant layer 3, namely drying and then extruding and molding PPR resin, β nucleating agent, ultrahigh molecular weight polyethylene and antioxidant which are selected according to the proportion to obtain the cold-resistant layer 3;
F. secondary pressurization: the prepared cold-resistant layer 3 is uniformly hot-pressed and coated on the outer surface of the primary pipeline to obtain a secondary pipeline for later use;
G. preparing a wear-resistant layer 4: drying and then heating and melting polypropylene, polyethylene, zinc stearate, graphene, polyolefin resin and superfine mica sheets which are selected according to the proportion, and then hot-pressing and extruding the wear-resistant layer 4;
H. and (3) pressurizing for three times: and uniformly hot-pressing and coating the prepared wear-resistant layer 4 on the outer surface of the secondary pipeline to obtain the final finished product PPR pipe.
Example 2
As shown in fig. 1, the high-toughness PPR pipe comprises a PPR base pipe 1, wherein a high-toughness layer 2 is arranged on the outer side of the PPR base pipe 1, a cold-resistant layer 3 is arranged on the outer side of the high-toughness layer 2, and a wear-resistant layer 4 is arranged on the outer side of the cold-resistant layer 3;
the PPR base tube 1 is composed of the following raw materials in parts by mass: 110 parts of PPR resin, 5 parts of nucleating agent master batch, 20 parts of temperature-resistant stiffening master batch, 9 parts of glass fiber, 18 parts of carbon fiber, 4 parts of graphite and 1.5 parts of coupling agent;
the cold-resistant layer 3 is composed of the following raw materials, by mass, 22 parts of PPR resin, 4 parts of β nucleating agent, 4 parts of ultra-high molecular weight polyethylene and 6 parts of antioxidant;
the wear-resistant layer 4 is composed of the following raw materials in parts by mass: 27 parts of polypropylene, 12 parts of polyethylene, 3 parts of zinc stearate, 1.5 parts of graphene, 7 parts of polyolefin resin and 3 parts of superfine mica sheets;
the high-toughness layer 2 is composed of the following raw materials in parts by mass: 23 parts of PPR resin, 2 parts of coupling agent, 2 parts of dispersing agent and 3.5 parts of antioxidant.
A preparation method of a high-toughness PPR pipe is characterized by comprising the following steps:
A. manufacturing a PPR base pipe 1: uniformly stirring PPR resin, nucleating agent master batches and high-temperature-resistant stiffening master batches selected according to the proportion in a stirrer, and drying to obtain a mixture;
B. putting the mixture obtained in the step A into an extruder for extrusion to obtain a PPR base pipe 1;
C. preparation of high-toughness layer 2: drying the PPR resin, the coupling agent, the dispersing agent and the antioxidant which are selected according to the proportion, heating and melting, and then hot-pressing and extruding the high-toughness layer 2;
D. primary pressurization: the prepared high-toughness layer 2 is uniformly hot-pressed and coated on the outer surface of the prepared PPR base pipe 1 to obtain a primary pipeline for later use;
E. preparing a cold-resistant layer 3, namely drying and then extruding and molding PPR resin, β nucleating agent, ultrahigh molecular weight polyethylene and antioxidant which are selected according to the proportion to obtain the cold-resistant layer 3;
F. secondary pressurization: the prepared cold-resistant layer 3 is uniformly hot-pressed and coated on the outer surface of the primary pipeline to obtain a secondary pipeline for later use;
G. preparing a wear-resistant layer 4: drying and then heating and melting polypropylene, polyethylene, zinc stearate, graphene, polyolefin resin and superfine mica sheets which are selected according to the proportion, and then hot-pressing and extruding the wear-resistant layer 4;
H. and (3) pressurizing for three times: and uniformly hot-pressing and coating the prepared wear-resistant layer 4 on the outer surface of the secondary pipeline to obtain the final finished product PPR pipe.
Example 3
As shown in fig. 1, the high-toughness PPR pipe comprises a PPR base pipe 1, wherein a high-toughness layer 2 is arranged on the outer side of the PPR base pipe 1, a cold-resistant layer 3 is arranged on the outer side of the high-toughness layer 2, and a wear-resistant layer 4 is arranged on the outer side of the cold-resistant layer 3;
the PPR base tube 1 is composed of the following raw materials in parts by mass: 120 parts of PPR resin, 6.5 parts of nucleating agent master batch, 25 parts of temperature-resistant stiffening master batch, 11 parts of glass fiber, 20 parts of carbon fiber, 6 parts of graphite and 2.5 parts of coupling agent;
the cold-resistant layer 3 is composed of the following raw materials, by mass, 26 parts of PPR resin, 4.5 parts of β nucleating agent, 4.5 parts of ultra-high molecular weight polyethylene and 7 parts of antioxidant;
the wear-resistant layer 4 is composed of the following raw materials in parts by mass: 29 parts of polypropylene, 13.5 parts of polyethylene, 4 parts of zinc stearate, 1.7 parts of graphene, 8 parts of polyolefin resin and 4 parts of superfine mica sheets;
the high-toughness layer 2 is composed of the following raw materials in parts by mass: 26 parts of PPR resin, 2.5 parts of coupling agent, 4 parts of dispersing agent and 4 parts of antioxidant.
A preparation method of a high-toughness PPR pipe is characterized by comprising the following steps:
A. manufacturing a PPR base pipe 1: uniformly stirring PPR resin, nucleating agent master batches and high-temperature-resistant stiffening master batches selected according to the proportion in a stirrer, and drying to obtain a mixture;
B. putting the mixture obtained in the step A into an extruder for extrusion to obtain a PPR base pipe 1;
C. preparation of high-toughness layer 2: drying the PPR resin, the coupling agent, the dispersing agent and the antioxidant which are selected according to the proportion, heating and melting, and then hot-pressing and extruding the high-toughness layer 2;
D. primary pressurization: the prepared high-toughness layer 2 is uniformly hot-pressed and coated on the outer surface of the prepared PPR base pipe 1 to obtain a primary pipeline for later use;
E. preparing a cold-resistant layer 3, namely drying and then extruding and molding PPR resin, β nucleating agent, ultrahigh molecular weight polyethylene and antioxidant which are selected according to the proportion to obtain the cold-resistant layer 3;
F. secondary pressurization: the prepared cold-resistant layer 3 is uniformly hot-pressed and coated on the outer surface of the primary pipeline to obtain a secondary pipeline for later use;
G. preparing a wear-resistant layer 4: drying and then heating and melting polypropylene, polyethylene, zinc stearate, graphene, polyolefin resin and superfine mica sheets which are selected according to the proportion, and then hot-pressing and extruding the wear-resistant layer 4;
H. and (3) pressurizing for three times: and uniformly hot-pressing and coating the prepared wear-resistant layer 4 on the outer surface of the secondary pipeline to obtain the final finished product PPR pipe.
Example 4
As shown in fig. 1, the high-toughness PPR pipe comprises a PPR base pipe 1, wherein a high-toughness layer 2 is arranged on the outer side of the PPR base pipe 1, a cold-resistant layer 3 is arranged on the outer side of the high-toughness layer 2, and a wear-resistant layer 4 is arranged on the outer side of the cold-resistant layer 3;
the PPR base tube 1 is composed of the following raw materials in parts by mass: 130 parts of PPR resin, 8 parts of nucleating agent master batch, 30 parts of temperature-resistant stiffening master batch, 12 parts of glass fiber, 22 parts of carbon fiber, 8 parts of graphite and 3 parts of coupling agent;
the cold-resistant layer 3 is composed of the following raw materials, by mass, 30 parts of PPR resin, 5 parts of β nucleating agent, 5 parts of ultra-high molecular weight polyethylene and 8 parts of antioxidant;
the wear-resistant layer 4 is composed of the following raw materials in parts by mass: 30 parts of polypropylene, 15 parts of polyethylene, 5 parts of zinc stearate, 2 parts of graphene, 10 parts of polyolefin resin and 5 parts of superfine mica sheets;
the high-toughness layer 2 is composed of the following raw materials in parts by mass: 30 parts of PPR resin, 3 parts of coupling agent, 5 parts of dispersing agent and 5 parts of antioxidant.
A preparation method of a high-toughness PPR pipe is characterized by comprising the following steps:
A. manufacturing a PPR base pipe 1: uniformly stirring PPR resin, nucleating agent master batches and high-temperature-resistant stiffening master batches selected according to the proportion in a stirrer, and drying to obtain a mixture;
B. putting the mixture obtained in the step A into an extruder for extrusion to obtain a PPR base pipe 1;
C. preparation of high-toughness layer 2: drying the PPR resin, the coupling agent, the dispersing agent and the antioxidant which are selected according to the proportion, heating and melting, and then hot-pressing and extruding the high-toughness layer 2;
D. primary pressurization: the prepared high-toughness layer 2 is uniformly hot-pressed and coated on the outer surface of the prepared PPR base pipe 1 to obtain a primary pipeline for later use;
E. preparing a cold-resistant layer 3, namely drying and then extruding and molding PPR resin, β nucleating agent, ultrahigh molecular weight polyethylene and antioxidant which are selected according to the proportion to obtain the cold-resistant layer 3;
F. secondary pressurization: the prepared cold-resistant layer 3 is uniformly hot-pressed and coated on the outer surface of the primary pipeline to obtain a secondary pipeline for later use;
G. preparing a wear-resistant layer 4: drying and then heating and melting polypropylene, polyethylene, zinc stearate, graphene, polyolefin resin and superfine mica sheets which are selected according to the proportion, and then hot-pressing and extruding the wear-resistant layer 4;
H. and (3) pressurizing for three times: and uniformly hot-pressing and coating the prepared wear-resistant layer 4 on the outer surface of the secondary pipeline to obtain the final finished product PPR pipe.
Comparative example 1
The high-toughness PPR pipe and the preparation method thereof provided in comparative example 1 are different from those of example 2 in that the cold-resistant layer 3 is not provided in example 5.
Comparative example 2
The high-toughness PPR pipe and the preparation method thereof provided by the comparative example 2 are different from those of the example 2 in that the wear-resistant layer 4 is not arranged in the example 5.
Comparative example 3
Comparative example 3 provides a high tenacity PPR pipe and method of making the same as example 2, except that example 5 does not have high tenacity layer 2.
The PPR pipes of examples 1-4 and comparative examples 1-3 were subjected to various tests, and the test results are shown in the following table:
Figure DEST_PATH_IMAGE002
note: 1. the weight of the drop hammer of the pipe drop hammer test is 2.5kg, the specification of the hammer head is D20, the height of the drop hammer is 2m, the length of the test pipe is 30cm, and the drop hammer test is required to be completed within 5s after the test pipe is taken out of a refrigerator. The qualified judgment basis of the pipe fittings is as follows: the surface of the pipe fitting is intact, and no crack, breakage or fracture exists; the basis for finally judging the qualification is as follows: at least 15 of the 20 test tubulars passed.
2. In the friction test, the test pipe has a length of 30cm and slides 100m while being dragged on the surface of the rough cement floor. The judgment basis is as follows: the surface of the pipe fitting is intact and has no damage; the pipe surface is obviously scratched and slightly cracked; the pipe surface is scratched seriously, and the inside is also affected, and the damage is serious.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. A high tenacity PPR pipe comprising a PPR based pipe (1), characterized in that:
the outer side of the PPR base pipe (1) is provided with a high-toughness layer (2), the outer side of the high-toughness layer (2) is provided with a cold-resistant layer (3), and the outer side of the cold-resistant layer (3) is provided with a wear-resistant layer (4);
the PPR base pipe (1) is composed of the following raw materials in parts by mass: 130 parts of PPR resin, 3-8 parts of nucleating agent master batch, 15-30 parts of temperature-resistant stiffening master batch, 8-12 parts of glass fiber, 15-22 parts of carbon fiber, 2-8 parts of graphite and 1-3 parts of coupling agent;
the cold-resistant layer (3) is composed of the following raw materials, by mass, 20-30 parts of PPR resin, 3-5 parts of β nucleating agent, 3-5 parts of ultra-high molecular weight polyethylene and 5-8 parts of antioxidant;
the wear-resistant layer (4) is composed of the following raw materials in parts by mass: 25-30 parts of polypropylene, 10-15 parts of polyethylene, 2-5 parts of zinc stearate, 1-2 parts of graphene, 5-10 parts of polyolefin resin and 2-5 parts of superfine mica sheets;
the high-toughness layer (2) is composed of the following raw materials in parts by mass: 20-30 parts of PPR resin, 1-3 parts of coupling agent, 1-5 parts of dispersing agent and 3-5 parts of antioxidant.
2. A high tenacity PPR pipe material according to claim 1 wherein: the coupling agent is selected from at least one of silane coupling agent, titanate coupling agent and chromium complex coupling agent.
3. A high tenacity PPR pipe material according to claim 1 wherein: the antioxidant is at least one selected from antioxidant 1010, antioxidant 1790 and antioxidant 168.
4. A process for the preparation of a high tenacity PPR pipe as claimed in claim 1, comprising the steps of:
A. manufacturing a PPR base pipe: uniformly stirring PPR resin, nucleating agent master batches and high-temperature-resistant stiffening master batches selected according to the proportion in a stirrer, and drying to obtain a mixture;
B. putting the mixture obtained in the step A into an extruder for extrusion to obtain a PPR base pipe;
C. preparing a high-toughness layer: drying the PPR resin, the coupling agent, the dispersing agent and the antioxidant which are selected according to the proportion, heating and melting, and then hot-pressing and extruding the high-toughness layer;
D. primary pressurization: uniformly hot-pressing and coating the prepared high-toughness layer on the outer surface of the prepared PPR base pipe to obtain a primary pipeline for later use;
E. preparing a cold-resistant layer, namely drying and then extruding and molding PPR resin, β nucleating agent, ultrahigh molecular weight polyethylene and antioxidant which are selected according to the proportion to obtain the cold-resistant layer;
F. secondary pressurization: uniformly hot-pressing and coating the prepared cold-resistant layer on the outer surface of the primary pipeline to obtain a secondary pipeline for later use;
G. preparing a wear-resistant layer: drying polypropylene, polyethylene, zinc stearate, graphene, polyolefin resin and superfine mica sheets, heating and melting, and hot-pressing to extrude out the wear-resistant layer;
H. and (3) pressurizing for three times: and uniformly hot-pressing and coating the prepared wear-resistant layer on the outer surface of the secondary pipeline to obtain the final finished product PPR pipe.
5. The process of making a high tenacity PPR pipe as claimed in claim 4, wherein: the temperature of the material barrel of the extruder is controlled to be 160-190 ℃, the temperature of the die body of the die in the extruder is controlled to be 180-210 ℃, and the temperature of the die body of the die is controlled to be 190-230 ℃.
6. A high tenacity PPR pipe material according to claim 1 wherein: the thickness of the cold-resistant layer and the wear-resistant layer is 0.3mm-0.5mm, and the thickness of the high-toughness layer is 0.8-1.2 mm.
7. A high tenacity PPR pipe material according to claim 1 wherein: and a paint layer is sprayed on the surface of the wear-resistant layer.
CN201911279459.9A 2019-12-13 2019-12-13 High-toughness PPR (polypropylene random copolymer) pipe and preparation method thereof Pending CN110978704A (en)

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