CN114889228A - Polyethylene blending modified polyvinyl chloride drain pipe and preparation method thereof - Google Patents
Polyethylene blending modified polyvinyl chloride drain pipe and preparation method thereof Download PDFInfo
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- CN114889228A CN114889228A CN202210740344.0A CN202210740344A CN114889228A CN 114889228 A CN114889228 A CN 114889228A CN 202210740344 A CN202210740344 A CN 202210740344A CN 114889228 A CN114889228 A CN 114889228A
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- 239000004800 polyvinyl chloride Substances 0.000 title claims abstract description 64
- 229920000915 polyvinyl chloride Polymers 0.000 title claims abstract description 64
- 238000002156 mixing Methods 0.000 title claims abstract description 53
- -1 Polyethylene Polymers 0.000 title claims abstract description 48
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 48
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 46
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 30
- 239000004709 Chlorinated polyethylene Substances 0.000 claims abstract description 29
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 29
- 239000002131 composite material Substances 0.000 claims abstract description 29
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 15
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical class O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000002270 dispersing agent Substances 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 12
- 239000004609 Impact Modifier Substances 0.000 claims abstract description 11
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims abstract description 11
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 11
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000835 fiber Substances 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 11
- 229920005989 resin Polymers 0.000 claims abstract description 11
- 239000003381 stabilizer Substances 0.000 claims abstract description 11
- 238000013329 compounding Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 230000035939 shock Effects 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 36
- 229920001971 elastomer Polymers 0.000 description 31
- 230000000670 limiting effect Effects 0.000 description 14
- 230000002093 peripheral effect Effects 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
Images
Classifications
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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
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
-
- 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
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- 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
-
- 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
- B32B2597/00—Tubular articles, e.g. hoses, pipes
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the field of polymer composite materials, in particular to a polyethylene blending modified polyvinyl chloride drain pipe and a preparation method thereof. The composite material is formed by compounding an inner layer and an outer layer through hot melting, wherein the outer layer and the inner layer are both made of polyethylene blending modified polyvinyl chloride composite materials; the polyethylene blending modified polyvinyl chloride composite material comprises the following materials in parts by weight: 58-60 parts of PVC resin SG-5, 6-8 parts of CPE chlorinated polyethylene, 3-5 parts of NBR nitrile rubber, 7-9 parts of ACR impact modifier, 10-12 parts of modified nano calcium carbonate, 5-9 parts of modified silicon fiber whisker, 3-5 parts of modified talcum powder, 2-4 parts of organic tin stabilizer, 1-2 parts of EBS dispersant, 0.3-0.5 part of antioxidant 1010 and 0.3-0.5 part of antioxidant 168. The invention improves the ring rigidity, ring flexibility, shock resistance and high and low temperature performance of the drain pipe.
Description
Technical Field
The invention relates to the field of polymer composite materials, in particular to a polyethylene blending modified polyvinyl chloride drain pipe and a preparation method thereof.
Background
Among the numerous plastic buried drain pipes, double-wall corrugated pipes are more material-saving than other plastic pipes, and become the first choice of many investors. When a large-caliber double-wall corrugated pipe is produced by using some common pipe materials, the problems of poor impact resistance, incapability of meeting the requirement of product ring rigidity, PVC double-wall corrugated pipe, obvious low-temperature brittleness in winter, softening and discoloring of the pipe in summer and the like can occur.
Ring stiffness and ring compliance are the most important performance criteria for pipes because in buried drain pipe applications, the pipe does not bear internal pressure or very low pressure, but only external pressure loads (including dynamic and static loads). If the ring stiffness of the pipe is too small, the pipe is greatly deformed and damaged, so that the safe use of the pipe cannot be ensured; if the ring flexibility is too low, the pipe is easy to damage and leak water in the use process. By adding inorganic fillers such as: chopped glass fiber, calcium carbonate, talcum powder, kaolin, wollastonite and the like are used for reducing the material cost and improving the rigidity of the material performance, however, the material performance is generally embrittled after inorganic filling materials are added into plastic materials, the notch impact toughness is reduced, and the service performance of the material is obviously influenced. When the toughness of plastics is increased, products such as plasticizers and the like are usually added in the early stage, but the toughness of plastics is low in modulus and glass transition temperature, so that the toughness of plastics has inherent defects, such as great reduction of rigidity, strength and heat distortion temperature of materials, improvement of cost and the like. The strength increase or impact performance improvement of the polyvinyl chloride composite material always comes at the expense of other properties, so how to keep the balance of the strength and toughness and the high and low temperature resistance of the polyvinyl chloride blending modified composite material is a key problem for preparing the buried pollution discharge polyvinyl chloride drainage pipe.
Disclosure of Invention
The invention aims to provide a polyethylene blending modified polyvinyl chloride drain pipe and a preparation method thereof aiming at the problems in the background art, and the ring stiffness, ring flexibility, impact resistance and high and low temperature performance of the drain pipe are improved.
On one hand, the invention provides a polyethylene blending modified polyvinyl chloride drain pipe which is formed by compounding an inner layer and an outer layer through hot melting, wherein the outer layer is provided with corrugations in an inverted U-shaped waveform structure, and the outer layer and the inner layer are both made of polyethylene blending modified polyvinyl chloride composite materials;
the polyethylene blending modified polyvinyl chloride composite material comprises the following materials in parts by weight: 58-60 parts of PVC resin SG-5, 6-8 parts of CPE chlorinated polyethylene, 3-5 parts of NBR nitrile rubber, 7-9 parts of ACR impact modifier, 10-12 parts of modified nano calcium carbonate, 5-9 parts of modified silicon fiber whisker, 3-5 parts of modified talcum powder, 2-4 parts of organic tin stabilizer, 1-2 parts of EBS dispersant, 0.3-0.5 part of antioxidant 1010 and 0.3-0.5 part of antioxidant 168.
Preferably, the chlorinated polyethylene of CPE is CPE135A, and the chlorine content is 36-42%; NBR nitrile rubber, AN content 20% -30%; the modified nano calcium carbonate is more than 3000 meshes.
On the other hand, the invention provides a preparation method of the polyethylene blending modified polyvinyl chloride drain pipe, which comprises the steps of respectively adding an inner layer material and an outer layer material into two extruders for extrusion, heating, melting, plasticizing and conveying the materials to a head die through a single screw of the extruders, vacuumizing the inner layer of the pipe through an inner diameter sleeve, cooling and shaping, closely contacting the outer layer of the pipe with a module under the combined action of internal air pressure and external vacuum suction to form, uniformly fusing the inner layer and the outer layer of the pipe together, and extruding the inner layer at each temperature: 130 ℃, 140 ℃, 150 ℃, 150 ℃, 150 ℃, and the temperature of each section of outer layer extrusion: 130 ℃, 140 ℃, 150 ℃, 150 ℃ and 150 ℃.
Preferably, the polyethylene blending modified polyvinyl chloride composite material comprises the following two preparation modes:
the first preparation method comprises the following steps:
s11, preparing the following raw materials in parts by weight: 58-60 parts of PVC resin SG-5, 6-8 parts of CPE chlorinated polyethylene, 3-5 parts of NBR nitrile rubber, 7-9 parts of ACR impact modifier, 10-12 parts of modified nano calcium carbonate, 5-9 parts of modified silicon fiber whisker, 3-5 parts of modified talcum powder, 2-4 parts of organic tin stabilizer, 1-2 parts of EBS dispersant, 0.3-0.5 part of antioxidant 1010 and 0.3-0.5 part of antioxidant 168;
s12, adding the raw materials into a high-speed mixer, mixing for 10-15 minutes to obtain a mixed material, adding the mixed material into a double-stage extruder set, carrying out melting, plasticizing, mixing, extruding and granulating, and finally cooling and granulating to obtain the polyethylene blending modified polyvinyl chloride drain pipe special material, wherein the material cylinder temperature is respectively as follows: 1350 ℃, 1450 ℃, 150 ℃, 150 ℃, 150 ℃ and neck ring mold temperature: 150 ℃;
the second preparation method comprises the following steps:
s21, preparing the following raw materials in parts by weight: 58-60 parts of PVC resin SG-5, 6-8 parts of CPE chlorinated polyethylene, 3-5 parts of NBR nitrile rubber, 7-9 parts of ACR impact modifier, 10-12 parts of modified nano calcium carbonate, 5-9 parts of modified silicon fiber whisker, 3-5 parts of modified talcum powder, 2-4 parts of organic tin stabilizer, 1-2 parts of EBS dispersant, 0.3-0.5 part of antioxidant 1010 and 0.3-0.5 part of antioxidant 168;
and S22, mixing, modifying, melting, plasticizing and mixing by using an internal mixer, extruding and granulating by using an extruder unit, and finally cooling and granulating to obtain the polyethylene blending modified polyvinyl chloride drain pipe special material.
Preferably, in step S12, the polyethylene blending modified polyvinyl chloride composite material is prepared by a one-step method, and the materials are first highly mixed by a high-speed mixer with a heating device rotating at 360 degrees, so that the materials can be highly homogenized; and then carrying out modified granulation by a double-stage granulator set to obtain the polyethylene blending modified polyvinyl chloride composite material.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention adopts the polyethylene blending modified polyvinyl chloride and the reinforcement and toughening of the nano and whisker particles to form the multi-element composite material, and adopts the composite material to prepare the polyethylene blending modified polyvinyl chloride drain pipe, so that the ring rigidity, the ring flexibility, the shock resistance, the high and low temperature performance and the like of the prepared polyethylene blending modified polyvinyl chloride drain pipe are obviously improved, and the special environmental performance requirements of the buried drain pipe can be met.
Drawings
FIG. 1 is a schematic view of the connection of corrugated pipes by a sealing connection structure according to the present invention;
FIG. 2 is a cross-sectional view of the structure of FIG. 1;
FIG. 3 is an enlarged view of the structure at A in FIG. 2;
FIG. 4 is a schematic view of the bellows connected by another sealing connection structure according to the present invention;
FIG. 5 is a cross-sectional view of the structure of FIG. 4;
fig. 6 is an enlarged view of the structure at B in fig. 5.
Reference numerals: 1. a bellows; 11. a flared part; 111. a limiting groove; 21. a sealing rubber ring a; 22. a sealing rubber ring b; 3. and a limiting rubber ring.
Detailed Description
As shown in fig. 1-6, two corrugated pipes 1 of the polyethylene blend modified polyvinyl chloride drain pipe, namely the corrugated pipe 1, provided by the invention can be connected by adopting a sealing connection structure, and the sealing connection structure comprises a sealing rubber ring and a limiting rubber ring 3. The corrugated pipe 1 is formed by compounding an inner layer and an outer layer through hot melting, the outer layer is provided with corrugations in an inverted U-shaped wave structure, namely a plurality of wave crest portions are arranged side by side along the axial direction, and wave trough portions are formed between adjacent wave crest portions. One end of the corrugated pipe 1 is a flared part 11, the flared part 11 is provided with a limiting groove 111, the limiting groove 111 is an annular groove, the limiting groove 111 is coaxial with the flared part 11, the limiting rubber ring 3 and the sealing rubber ring are sequentially sleeved at the other end of the corrugated pipe 1 along the direction away from the flared part 11, and the limiting rubber ring 3 is located at the valley part.
The limiting groove 111 is V-shaped in section along the axial direction; the limiting rubber ring 3 comprises an integrally formed clamping portion, a clamping portion and a sleeving portion, the clamping portion and the sleeving portion are of annular structures and are coaxially distributed, the clamping portion is located on one side, away from the sealing rubber ring, of the sleeving portion, the clamping portion is located on the outer peripheral side of the sleeving portion, the clamping portion is matched with the limiting groove 111 in structure, the sleeving portion is sleeved at a wave trough portion, when the two corrugated pipes 1 are connected, the clamping portion is clamped between a wave crest portion of one corrugated pipe 1 and an expanding portion 11 of the other corrugated pipe 1, therefore, the limiting effect and the sealing effect can be further improved on the basis of the clamping portion and the sealing rubber ring, the clamping portion is clamped at the limiting groove 111, accordingly, the limiting and fixing effect can be effectively achieved, the outer peripheral face of the sealing rubber ring is in sealing connection with the inner peripheral face of the expanding portion 11 of the other corrugated pipe 1, and accordingly, the sealing connection state can be maintained. For the first sealing connection structure, the sealing rubber ring is the sealing rubber ring a21, the sealing rubber ring a21 is sleeved at the wave valley part and can be installed firmly, the section of the sealing rubber ring a21 along the axial direction is rectangular, the sealing rubber ring a21 is a conventional sealing rubber ring, and materials are easy to obtain.
The sealing connection structure can improve the connection stability and the sealing effect of the corrugated pipe 1. Before connecting two bellows 1, all overlap in proper order and establish spacing rubber ring 3 and sealing rubber ring on two bellows 1. When connecting two bellows 1, insert the flaring portion 11 place end of another bellows 1 with the sealing rubber ring place end of a bellows 1 for sealing rubber ring sealing connection is on the 11 inner peripheral surfaces of flaring portion of another bellows 1, and 3 joints of spacing rubber ring are in the spacing groove 111 department of another bellows 1, can guarantee the steadiness that two bellows 1 are connected, can avoid sealing rubber ring to appear the gap again, have ensured the leakproofness of bellows connection.
For the second sealing connection structure, the sealing rubber ring is the sealing rubber ring b22, at this time, the wave crest part of the corrugated pipe 1 is coaxially provided with an annular mounting groove, and the sealing rubber ring b22 is sleeved at the mounting groove. The mounting groove profile is the arc, and sealing rubber ring b22 inner peripheral surface and mounting groove laminating have improved the firm nature of cup jointing. The mounting groove of bellows 1 crest portion department can conveniently carry out the dismouting of sealing rubber ring b22, and after spacing rubber ring 3 joint reached spacing groove 111 department, sealing rubber ring b22 can be with 11 inner peripheral surfaces sealing connection of flaring portion, effective guarantee sealed effect.
Example one
The outer layer and the inner layer of the corrugated pipe 1 are both made of polyethylene blending modified polyvinyl chloride composite materials. The polyethylene blending modified polyvinyl chloride composite material comprises the following materials in parts by weight: 58 parts of PVC resin SG-5, 6 parts of CPE chlorinated polyethylene, 3 parts of NBR nitrile rubber, 7 parts of ACR impact modifier, 12 parts of modified nano calcium carbonate, 9 parts of modified silicon fiber whisker, 5 parts of modified talcum powder, 4 parts of organic tin stabilizer, 2 parts of EBS dispersant, 0.5 part of antioxidant 1010 and 0.5 part of antioxidant 168. CPE chlorinated polyethylene adopts CPE135A, the chlorine content is 36% -42%; NBR nitrile rubber, AN content 20% -30%; the modified nano calcium carbonate is more than 3000 meshes.
The preparation method of the polyethylene blending modified polyvinyl chloride drain pipe comprises the following steps: add two extruders respectively with inlayer material and skin material and extrude, the material is carried to the aircraft nose bush through extruder single screw rod heating melting plastify, and the tubular product inlayer is through interior sizing sleeve evacuation recooling design, and the tubular product skin is in the same place with module in close contact with shaping under the combined action of inside air pressure and outside vacuum suction, the inside and outside layer of tubular product fuses uniformly, and each section temperature is extruded to the inlayer: 130 ℃, 140 ℃, 150 ℃, 150 ℃, 150 ℃, and the temperature of each section of outer layer extrusion: 130 ℃, 140 ℃, 150 ℃, 150 ℃ and 150 ℃.
The polyethylene blending modified polyvinyl chloride composite material comprises the following two preparation methods:
the first preparation method comprises the following steps:
s11, preparing the following raw materials in parts by weight: 58 parts of PVC resin SG-5, 6 parts of CPE chlorinated polyethylene, 3 parts of NBR nitrile rubber, 7 parts of ACR impact modifier, 12 parts of modified nano calcium carbonate, 9 parts of modified silicon fiber whisker, 5 parts of modified talcum powder, 4 parts of organic tin stabilizer, 2 parts of EBS dispersant, 0.5 part of antioxidant 1010 and 0.5 part of antioxidant 168;
s12, adding the raw materials into a high-speed mixer, mixing for 10-15 minutes to obtain a mixed material, adding the mixed material into a double-stage extruder set, carrying out melting, plasticizing, mixing, extruding and granulating, and finally cooling and granulating to obtain the polyethylene blending modified polyvinyl chloride drain pipe special material, wherein the material cylinder temperature is respectively as follows: 1350 ℃, 1450 ℃, 150 ℃, 150 ℃, 150 ℃ and neck ring mold temperature: at 150 ℃. The polyethylene blending modified polyvinyl chloride composite material is prepared by adopting a one-step method, materials are firstly highly mixed by a high-speed mixer which rotates by 360 degrees and is provided with a heating device, so that various materials can be highly homogenized; and then carrying out modified granulation by a double-stage granulator set to obtain the polyethylene blending modified polyvinyl chloride composite material.
The second preparation method comprises the following steps:
s21, preparing the following raw materials in parts by weight: 58 parts of PVC resin SG-5, 6 parts of CPE chlorinated polyethylene, 3 parts of NBR nitrile rubber, 7 parts of ACR impact modifier, 12 parts of modified nano calcium carbonate, 9 parts of modified silicon fiber whisker, 5 parts of modified talcum powder, 4 parts of organic tin stabilizer, 2 parts of EBS dispersant, 0.5 part of antioxidant 1010 and 0.5 part of antioxidant 168;
and S22, mixing, modifying, melting, plasticizing and mixing by using an internal mixer, extruding and granulating by using an extruder unit, and finally cooling and granulating to obtain the polyethylene blending modified polyvinyl chloride drain pipe special material.
In the embodiment, the polyvinyl chloride is modified by the composite modifiers CPE, NBR and ACR, so that the compatibility of the system is improved, and the impact resistance, toughness, weather resistance and the like of the system material are enhanced.
In this embodiment, in order to improve the reinforcing and toughening functions of the inorganic filler, nanoscale inorganic powders and whisker materials with different particle sizes, different mesh numbers and different shapes are distributed in a three-dimensional grid structure, and the inorganic powders are efficiently dispersed by the EBS high dispersant.
Table 1: example one physical and mechanical properties of the polyethylene blend modified polyvinyl chloride Drain pipe
Example two
The present invention provides a polyethylene blending modified polyvinyl chloride drain pipe, which is different from the first embodiment in that, in the present embodiment, the polyethylene blending modified polyvinyl chloride composite material includes the following materials in parts by weight: 60 parts of PVC resin SG-5, 8 parts of CPE chlorinated polyethylene, 5 parts of NBR nitrile rubber, 9 parts of ACR impact modifier, 10 parts of modified nano calcium carbonate, 5 parts of modified silicon fiber whisker, 3 parts of modified talcum powder, 2 parts of organic tin stabilizer, 1 part of EBS dispersant, 0.3 part of antioxidant 1010 and 0.3 part of antioxidant 168. The preparation method of the polyethylene blend modified polyvinyl chloride composite material in the embodiment is the same as that in the first embodiment.
Table 2: physical and mechanical properties of the polyethylene blend modified polyvinyl chloride drain pipe prepared in example two
The invention adopts the polyethylene blending modified polyvinyl chloride and the reinforcement and toughening of the nano and whisker particles to form the multi-element composite material, and adopts the composite material to prepare the polyethylene blending modified polyvinyl chloride drain pipe, so that the ring rigidity, the ring flexibility, the shock resistance, the high and low temperature performance and the like of the prepared polyethylene blending modified polyvinyl chloride drain pipe are obviously improved, and the special environmental performance requirements of the buried drain pipe can be met.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (5)
1. A polyethylene blending modified polyvinyl chloride drain pipe is characterized by being formed by hot-melting and compounding an inner layer and an outer layer, wherein the outer layer is provided with reverse-U-shaped corrugated structure ripples, and the outer layer and the inner layer are both made of polyethylene blending modified polyvinyl chloride composite materials;
the polyethylene blending modified polyvinyl chloride composite material comprises the following materials in parts by weight: 58-60 parts of PVC resin SG-5, 6-8 parts of CPE chlorinated polyethylene, 3-5 parts of NBR nitrile rubber, 7-9 parts of ACR impact modifier, 10-12 parts of modified nano calcium carbonate, 5-9 parts of modified silicon fiber whisker, 3-5 parts of modified talcum powder, 2-4 parts of organic tin stabilizer, 1-2 parts of EBS dispersant, 0.3-0.5 part of antioxidant 1010 and 0.3-0.5 part of antioxidant 168.
2. The polyethylene blend modified polyvinyl chloride drainage pipe according to claim 1, wherein the chlorinated polyethylene of CPE is CPE135A, and the chlorine content is 36% -42%; NBR nitrile rubber, the AN content is 20 percent to 30 percent; the modified nano calcium carbonate is more than 3000 meshes.
3. The preparation method of the polyethylene blend modified polyvinyl chloride drain pipe according to claim 1, wherein the inner layer material and the outer layer material are respectively added into two extruders for extrusion, the materials are heated, melted, plasticized and conveyed to a head die through a single screw of the extruders, the inner layer of the pipe is vacuumized and cooled and shaped through an inner diameter sleeve, the outer layer of the pipe is closely contacted with a module for molding under the combined action of internal air pressure and external vacuum suction, the inner layer and the outer layer of the pipe are uniformly fused together, and the inner layer is extruded at each temperature: 130 ℃, 140 ℃, 150 ℃, 150 ℃, 150 ℃, and the temperature of each section of outer layer extrusion: 130 ℃, 140 ℃, 150 ℃, 150 ℃ and 150 ℃.
4. The method for preparing the polyethylene blending modified polyvinyl chloride drain pipe according to claim 3, wherein the polyethylene blending modified polyvinyl chloride composite material comprises the following two preparation methods:
the first preparation method comprises the following steps:
s11, preparing the following raw materials in parts by weight: 58-60 parts of PVC resin SG-5, 6-8 parts of CPE chlorinated polyethylene, 3-5 parts of NBR nitrile rubber, 7-9 parts of ACR impact modifier, 10-12 parts of modified nano calcium carbonate, 5-9 parts of modified silicon fiber whisker, 3-5 parts of modified talcum powder, 2-4 parts of organic tin stabilizer, 1-2 parts of EBS dispersant, 0.3-0.5 part of antioxidant 1010 and 0.3-0.5 part of antioxidant 168;
s12, adding the raw materials into a high-speed mixer, mixing for 10-15 minutes to obtain a mixed material, adding the mixed material into a double-stage extruder set, carrying out melting, plasticizing, mixing, extruding and granulating, and finally cooling and granulating to obtain the polyethylene blending modified polyvinyl chloride drain pipe special material, wherein the material cylinder temperature is respectively as follows: 1350 ℃, 1450 ℃, 150 ℃, 150 ℃, 150 ℃ and neck mold temperature: 150 ℃;
the second preparation method comprises the following steps:
s21, preparing the following raw materials in parts by weight: 58-60 parts of PVC resin SG-5, 6-8 parts of CPE chlorinated polyethylene, 3-5 parts of NBR nitrile rubber, 7-9 parts of ACR impact modifier, 10-12 parts of modified nano calcium carbonate, 5-9 parts of modified silicon fiber whisker, 3-5 parts of modified talcum powder, 2-4 parts of organic tin stabilizer, 1-2 parts of EBS dispersant, 0.3-0.5 part of antioxidant 1010 and 0.3-0.5 part of antioxidant 168;
and S22, mixing, modifying, melting, plasticizing and mixing by using an internal mixer, extruding and granulating by using an extruder unit, and finally cooling and granulating to obtain the polyethylene blending modified polyvinyl chloride drain pipe special material.
5. The method for preparing a drain pipe of polyethylene blend modified polyvinyl chloride according to claim 4, wherein in step S12, the polyethylene blend modified polyvinyl chloride composite material is prepared by a one-step method, and the materials are highly mixed by a high-speed mixer with a heating device rotating at 360 degrees, so that the materials can be highly homogenized; and then carrying out modified granulation by a double-stage granulator set to obtain the polyethylene blending modified polyvinyl chloride composite material.
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