CN104194216A - Double-walled PVC (polyvinyl chloride) corrugated tube and preparation method thereof - Google Patents
Double-walled PVC (polyvinyl chloride) corrugated tube and preparation method thereof Download PDFInfo
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- CN104194216A CN104194216A CN201410420829.7A CN201410420829A CN104194216A CN 104194216 A CN104194216 A CN 104194216A CN 201410420829 A CN201410420829 A CN 201410420829A CN 104194216 A CN104194216 A CN 104194216A
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Abstract
The invention discloses a double-walled PVC corrugated tube and a preparation method thereof. The preparation method comprises the following steps: weighing PVC, DOA, calcium carbonate, triphenyl phosphate, paraffin, DOS, a thermal stabilizer, ABS, titanium dioxide, an antioxidant 1010, a plasticizer, an antioxidant DLTP, polyethylene wax, benzotriazole and ACR in parts by weight, uniformly mixing, extruding and pelletizing; cooling and shaping; drawing; and sawing, wherein the product tensile strength is 26-30MPa, the elongation is 200-300%, the tensile weak modulus is 780-800MPa, the coefficient of linear expansion is 3*10<-4> DEG C<-1>, the bending strength is 28-32MPa, the impact strength is 120-140J/m, the brittleness temperature is <->80 DEG C, the thermal deformation temperature is 90-100 DEG C, the volume resistivity is 1019 ohm.cm, the dielectric constant is 2-3 and the dielectric strength is 400-450kV/cm.
Description
Technical field
The application belongs to corrugated tube preparation technology field, relates in particular to a kind of PVC double-wall corrugated pipe and preparation method thereof.
Background technology
Corrugated tube refers to the tubulose elastic sensing element connecting into along folding retractable direction with collapsible wrinkle sheet.Corrugated tube is widely used in instrument, and main application is the measuring sensor as pressure measuring instruments, converts pressure to displacement or power.Corrugated tube tube wall is thinner, and sensitivity is higher, and useful range is that tens of handkerchiefs are to tens of MPas.Its opening end is fixed, and sealed end is in free state, and utilizes auxiliary whisker or reed to increase elasticity.When work, under the effect of internal pressure, extend along tube length direction, make movable end produce the displacement that becomes certain relation with pressure.Movable end drives pointer to get final product the size of direct indicator pressure.Corrugated tube usually combines and forms the pressure transmitter that is output as electric weight with displacement sensor, sometimes also as isolated component.Because the stretching, extension of corrugated tube requires larger volume-variation, therefore its response speed is lower than Bourdon tube.Corrugated tube is suitable for measuring low pressure.A kind of pressure measurement elastic element in pressure measuring instruments.It is the housing with the cylinder-shaped thin wall wrinkle of multiple transverse waves, and corrugated tube has elasticity, under pressure, axial force, transverse force or Moment, can produce displacement.Corrugated tube is widely used in instrument, and main application is the measuring sensor as pressure measuring instruments, converts pressure to displacement or power.Corrugated tube tube wall is thinner, and sensitivity is higher, and useful range is that tens of handkerchiefs are to tens of MPas.In addition, corrugated tube also can be used as seal isolation element, two media is separated or prevented the measure portion of harmful fluids access arrangement.It can also be used as shim member, utilizes the temperature error of the mutability compensation apparatus of its volume.Sometimes be also used as the resilient connection joint of two parts etc.Corrugated tube can be divided into two kinds of metallic bellows, nonmetal corrugated tubes by constituent material; Can be divided into individual layer and multilayer by structure.Singel-ply bellows (seeing figure) is applied more.Multiply bellows intensity is high, good endurance, and stress is little, is used in important measurement.The material of corrugated tube is generally your alloy of bronze, brass, stainless steel, Monel metal and inconel etc.
High density polyethylene(HDPE) (HDPE) double-wall corrugated pipe, is a kind of novel tube with ring texture outer wall and smooth internal walls, and first succeed in developing the beginning of the eighties in Germany.Through the development and improvements of more than ten years, by single Cultivar development to complete product line.Very ripe in production technique and operation technique at present.Due to the cost of its excellent performance and relatively economical, great promotion and application are obtained in developed countries such as America and Europes.In China, the promotion and application of HDPE double-wall corrugated pipe are in the rising situation stage, and all technical all reaches use standard.High density polyethylene(HDPE) (HDPE) has the performance of excellent chemical stability, ageing-resistant and resisting environmental stress and cracking.The HDPE double-wall corrugated pipe of being produced for starting material by it belongs to metal hose.It wants performance as follows: critical external compressive resistance ability is strong, construction costs is low, easy construction, the coefficient of friction resistance are little, and flow is large, low-temperature resistant and shock resistant performance, chemical stability are good, long service life, excellent wear resisting property, suitable deflection degree.
Double-wall corrugated pipe: tube wall cross section is bilayer structure, and its inner wall smooth is smooth, the equidistant tubing with trapezoidal hollow structure of arranging of outer wall.Nominal diameter (DN): nominal size of pipe, while dividing internal diameter series and external diameter series two roughly the same, carry out.Structure uniqueness, intensity is high, inner wall smooth, friction resistance is little, and circulation is large, and basis does not need to do concrete foundation, lightweight, and carrying and installation is convenient, quick construction; Rubber ring socket joint connects, and method is reliable, and construction quality easily ensures; Flexible interface.Anti-non-uniform settling ability is strong; Anti-leakage effect is good, erosion that can the medium of resistance to number of chemical; Non-scaling in pipe, need not dredge substantially, and reach more than 50 years buried work-ing life.Pvc double-wall corrugated pipe is taking rigid polyvinyl chloride as main raw material, and pvc double-wall corrugated pipe is extruded by inside and outside respectively, once shaped, inwall is level and smooth, outer wall is trapezoidal corrugated, between inside and outside wall by the hollow plastic pipe of double wall.Polyvinyl chloride, the English PVC (Polyvinyl chloride polymer=PVC molecular structure) that is called for short, is the thermoplastic resin being polymerized under initiator effect by vinylchlorid.It is the homopolymer of vinylchlorid.Ryuron and vinyl chloride copolymer system are referred to as vinyl chloride resin.PVC is the white powder of amorphous structure, and the degree of branching is less.Industrial PVC molecular weight generally, in 50,000～120,000 scopes, has larger polymolecularity, and molecular weight increases with the reduction of polymerization temperature; Without definite melting point, 80～85 DEG C start to soften, and 130 DEG C become viscoelastic state, and 160～180 DEG C start to change into viscous state; There is good mechanical property, tensile strength 60MPa left and right, shock strength 5～10kJ/m
2; There are excellent dielectric properties.But to the poor stability of light and heat, more than 100 DEG C or through long-time exposure in sunshine, will decompose and produce hydrogenchloride, and further autocatalytically is decomposed, cause variable color, physical and mechanical properties also declines rapidly, must add in actual applications stablizer to improve the stability to light and heat.PVC is very hard, and solvability is also very poor, can only be dissolved in the minority solvents such as pimelinketone, ethylene dichloride and tetrahydrofuran (THF), and all stable to organic and mineral acid, alkali, salt, chemical stability reduces with the rising of use temperature.PVC is dissolved in acetone-dithiocarbonic anhydride or Acetone-Benzene mixed solvent, forms fiber for dry-spinning or wet-spinning, claims polyvinyl chloride fibre, has difficult combustion, acid and alkali-resistance, antimicrobial, wear-resisting characteristic and has good heat retention and elasticity.And universal along with humanity concept, and the formation of novel harmonious society, design PVC double-wall corrugated pipe that a kind of tensile strength is high, elongation at break is high, flexural strength is high and shock strength is high and preparation method thereof and be very important.
Summary of the invention
The technical problem solving:
The application, for above-mentioned technical problem, provides a kind of PVC double-wall corrugated pipe and preparation method thereof, solves the technical problems such as existing corrugated tube tensile strength, elongation at break, flexural strength and shock strength are low.
Technical scheme:
A kind of PVC double-wall corrugated pipe, the raw materials by weight portion proportioning of described PVC double-wall corrugated pipe is as follows: PVC100 part; DOA15-35 part; Calcium carbonate 10-30 part; Triphenyl phosphite 1-5 part; Paraffin 2-6 part; DOS15-25 part; Thermo-stabilizer 8-18 part; ABS3-7 part; Titanium dioxide 2-8 part; Antioxidant 1010 is 0.3-0.9 part; Softening agent 15-35 part; Anti-oxidant DLTP is 0.2-0.6 part; Polyethylene wax 1-5 part; Benzotriazole 0.5-2.5 part; ACR5-25 part.
As a preferred technical solution of the present invention: the raw materials by weight portion proportioning of described PVC double-wall corrugated pipe is as follows: PVC100 part; DOA20-30 part; Calcium carbonate 15-25 part; Triphenyl phosphite 2-4 part; Paraffin 3-5 part; DOS18-22 part; Thermo-stabilizer 10-16 part; ABS4-6 part; Titanium dioxide 3-7 part; Antioxidant 1010 is 0.4-0.8 part; Softening agent 20-30 part; Anti-oxidant DLTP is 0.3-0.5 part; Polyethylene wax 2-4 part; Benzotriazole 1-2 part; ACR10-20 part.
As a preferred technical solution of the present invention: the raw materials by weight portion proportioning of described PVC double-wall corrugated pipe is as follows: PVC100 part; DOA25 part; 15 parts, calcium carbonate; 3 parts of triphenyl phosphites; 4 parts, paraffin; DOS20 part; 13 parts of thermo-stabilizers; ABS5 part; 5 parts of titanium dioxide; Antioxidant 1010 is 0.6 part; 25 parts, softening agent; Anti-oxidant DLTP is 0.4 part; 3 parts of polyethylene waxs; 1.5 parts of benzotriazoles; ACR15 part.
As a preferred technical solution of the present invention: described thermo-stabilizer adopts tribasic lead sulfate or dibasic lead phosphite.
As a preferred technical solution of the present invention: described softening agent adopts DOP or DBP.
As a preferred technical solution of the present invention: the preparation method of described PVC double-wall corrugated pipe, comprises the steps:
The first step: take PVC, DOA, calcium carbonate, triphenyl phosphite, paraffin, DOS, thermo-stabilizer, ABS, titanium dioxide, antioxidant 1010, softening agent, anti-oxidant DLTP, polyethylene wax, DOP and ACR according to parts by weight proportioning;
Second step: PVC, DOA, calcium carbonate, triphenyl phosphite and paraffin are dropped in reactor and is heated to 70-90 DEG C, stir 5-10min, then add surplus stock, be warming up to 100-120 DEG C, stir 10-30min;
The 3rd step: mixed material is dropped in forcing machine and extruded, 170 DEG C, 175 DEG C, 180 DEG C, 185 DEG C, 170 DEG C, 180 DEG C and 185 DEG C of barrel temperatures, 165 DEG C and 175 DEG C of die temperatures, 65 DEG C of extruder temperatures, engine speed 26-34r/min, sawing after cooling and shaping, traction.
Beneficial effect:
A kind of PVC double-wall corrugated pipe of the present invention and preparation method thereof adopts above technical scheme compared with prior art, has following technique effect: 1, product tensile strength 26-30MPa, and elongation 200%-300%, weak property modulus 780-800MPa stretches; 2, linear expansivity 3 × 10
-4dEG C
-1, flexural strength 28-32MPa, shock strength 120-140J/m; 3, embrittlement temperature-80 DEG C, heat-drawn wire 90-100 DEG C, volume specific resistance 10
19Ω cm; 4, specific inductivity 2-3, dielectric strength 400-450kV/cm, can the not division of history into periods of widespread production replace current material.
Embodiment
Embodiment 1:
Take PVC100 part according to parts by weight proportioning; DOA15 part; 10 parts, calcium carbonate; 1 part of triphenyl phosphite; 2 parts, paraffin; DOS15 part; 8 parts of dibasic lead phosphites; ABS3 part; 2 parts of titanium dioxide; Antioxidant 1010 is 0.3 part; DBP15 part; Anti-oxidant DLTP is 0.2 part; 1 part of polyethylene wax; 0.5 part of benzotriazole; ACR5 part.
PVC, DOA, calcium carbonate, triphenyl phosphite and paraffin are dropped in reactor and is heated to 70 DEG C, stir 5min, then add surplus stock, be warming up to 100 DEG C, stir 10min.
Mixed material is dropped in forcing machine and extruded, 170 DEG C, 175 DEG C, 180 DEG C, 185 DEG C, 170 DEG C, 180 DEG C and 185 DEG C of barrel temperatures, 165 DEG C and 175 DEG C of die temperatures, 65 DEG C of extruder temperatures, engine speed 26r/min, sawing after cooling and shaping, traction.
Product tensile strength 26MPa, elongation 200%, weak property modulus 780MPa stretches; Linear expansivity 3 × 10
-4dEG C
-1, flexural strength 28MPa, shock strength 120J/m; Embrittlement temperature-80 DEG C, 90 DEG C of heat-drawn wires, volume specific resistance 10
19Ω cm; Specific inductivity 2, dielectric strength 400kV/cm.
Embodiment 2:
Take PVC100 part according to parts by weight proportioning; DOA35 part; 30 parts, calcium carbonate; 5 parts of triphenyl phosphites; 6 parts, paraffin; DOS25 part; 18 parts of dibasic lead phosphites; ABS7 part; 8 parts of titanium dioxide; Antioxidant 1010 is 0.9 part; DBP35 part; Anti-oxidant DLTP is 0.6 part; 5 parts of polyethylene waxs; 2.5 parts of benzotriazoles; ACR25 part.
PVC, DOA, calcium carbonate, triphenyl phosphite and paraffin are dropped in reactor and is heated to 90 DEG C, stir 10min, then add surplus stock, be warming up to 120 DEG C, stir 30min.
Mixed material is dropped in forcing machine and extruded, 170 DEG C, 175 DEG C, 180 DEG C, 185 DEG C, 170 DEG C, 180 DEG C and 185 DEG C of barrel temperatures, 165 DEG C and 175 DEG C of die temperatures, 65 DEG C of extruder temperatures, engine speed 34r/min, sawing after cooling and shaping, traction.
Product tensile strength 27MPa, elongation 220%, weak property modulus 785MPa stretches; Linear expansivity 3 × 10
-4dEG C
-1, flexural strength 29MPa, shock strength 125J/m; Embrittlement temperature-80 DEG C, 93 DEG C of heat-drawn wires, volume specific resistance 10
19Ω cm; Specific inductivity 2, dielectric strength 410kV/cm.
Embodiment 3:
Take PVC100 part according to parts by weight proportioning; DOA20 part; 15 parts, calcium carbonate; 2 parts of triphenyl phosphites; 3 parts, paraffin; DOS18 part; 10 parts of tribasic lead sulfates; ABS4 part; 3 parts of titanium dioxide; Antioxidant 1010 is 0.4 part; DOP20 part; Anti-oxidant DLTP is 0.3 part; 2 parts of polyethylene waxs; 1 part of benzotriazole; ACR10 part.
PVC, DOA, calcium carbonate, triphenyl phosphite and paraffin are dropped in reactor and is heated to 70 DEG C, stir 5min, then add surplus stock, be warming up to 100 DEG C, stir 10min.
Mixed material is dropped in forcing machine and extruded, 170 DEG C, 175 DEG C, 180 DEG C, 185 DEG C, 170 DEG C, 180 DEG C and 185 DEG C of barrel temperatures, 165 DEG C and 175 DEG C of die temperatures, 65 DEG C of extruder temperatures, engine speed 34r/min, sawing after cooling and shaping, traction.
Product tensile strength 28MPa, elongation 250%, weak property modulus 790MPa stretches; Linear expansivity 3 × 10
-4dEG C
-1, flexural strength 30MPa, shock strength 130J/m; Embrittlement temperature-80 DEG C, 95 DEG C of heat-drawn wires, volume specific resistance 10
19Ω cm; Specific inductivity 3, dielectric strength 420kV/cm.
Embodiment 4:
Take PVC100 part according to parts by weight proportioning; DOA30 part; 25 parts, calcium carbonate; 4 parts of triphenyl phosphites; 5 parts, paraffin; DOS22 part; 16 parts of tribasic lead sulfates; ABS6 part; 7 parts of titanium dioxide; Antioxidant 1010 is 0.8 part; DOP30 part; Anti-oxidant DLTP is 0.5 part; 4 parts of polyethylene waxs; 2 parts of benzotriazoles; ACR20 part.
PVC, DOA, calcium carbonate, triphenyl phosphite and paraffin are dropped in reactor and is heated to 90 DEG C, stir 10min, then add surplus stock, be warming up to 120 DEG C, stir 30min.
Mixed material is dropped in forcing machine and extruded, 170 DEG C, 175 DEG C, 180 DEG C, 185 DEG C, 170 DEG C, 180 DEG C and 185 DEG C of barrel temperatures, 165 DEG C and 175 DEG C of die temperatures, 65 DEG C of extruder temperatures, engine speed 34r/min, sawing after cooling and shaping, traction.
Product tensile strength 29MPa, elongation 280%, weak property modulus 795MPa stretches; Linear expansivity 3 × 10
-4dEG C
-1, flexural strength 31MPa, shock strength 135J/m; Embrittlement temperature-80 DEG C, 98 DEG C of heat-drawn wires, volume specific resistance 10
19Ω cm; Specific inductivity 3, dielectric strength 430kV/cm.
Embodiment 5:
Take PVC100 part according to parts by weight proportioning; DOA25 part; 15 parts, calcium carbonate; 3 parts of triphenyl phosphites; 4 parts, paraffin; DOS20 part; 13 parts of tribasic lead sulfates; ABS5 part; 5 parts of titanium dioxide; Antioxidant 1010 is 0.6 part; DOP25 part; Anti-oxidant DLTP is 0.4 part; 3 parts of polyethylene waxs; 1.5 parts of benzotriazoles; ACR15 part.
PVC, DOA, calcium carbonate, triphenyl phosphite and paraffin are dropped in reactor and is heated to 80 DEG C, stir 8min, then add surplus stock, be warming up to 110 DEG C, stir 20min.
Mixed material is dropped in forcing machine and extruded, 170 DEG C, 175 DEG C, 180 DEG C, 185 DEG C, 170 DEG C, 180 DEG C and 185 DEG C of barrel temperatures, 165 DEG C and 175 DEG C of die temperatures, 65 DEG C of extruder temperatures, engine speed 30r/min, sawing after cooling and shaping, traction.
Product tensile strength 30MPa, elongation 300%, weak property modulus 800MPa stretches; Linear expansivity 3 × 10
-4dEG C
-1, flexural strength 32MPa, shock strength 140J/m; Embrittlement temperature-80 DEG C, 100 DEG C of heat-drawn wires, volume specific resistance 10
19Ω cm; Specific inductivity 3, dielectric strength 450kV/cm.
Composition all components in above embodiment all can business be bought.
Above-described embodiment is just for content of the present invention is set forth, instead of restriction, and therefore any change in implication and the scope suitable with claims of the present invention, all should think to be included in the scope of claims.
Claims (6)
1. a PVC double-wall corrugated pipe, is characterized in that the raw materials by weight portion proportioning of described PVC double-wall corrugated pipe is as follows: PVC100 part; DOA15-35 part; Calcium carbonate 10-30 part; Triphenyl phosphite 1-5 part; Paraffin 2-6 part; DOS15-25 part; Thermo-stabilizer 8-18 part; ABS3-7 part; Titanium dioxide 2-8 part; Antioxidant 1010 is 0.3-0.9 part; Softening agent 15-35 part; Anti-oxidant DLTP is 0.2-0.6 part; Polyethylene wax 1-5 part; Benzotriazole 0.5-2.5 part; ACR5-25 part.
2. a kind of PVC double-wall corrugated pipe according to claim 1, is characterized in that described PVC double-wall corrugated pipe raw materials by weight portion proportioning is as follows: PVC100 part; DOA20-30 part; Calcium carbonate 15-25 part; Triphenyl phosphite 2-4 part; Paraffin 3-5 part; DOS18-22 part; Thermo-stabilizer 10-16 part; ABS4-6 part; Titanium dioxide 3-7 part; Antioxidant 1010 is 0.4-0.8 part; Softening agent 20-30 part; Anti-oxidant DLTP is 0.3-0.5 part; Polyethylene wax 2-4 part; Benzotriazole 1-2 part; ACR10-20 part.
3. a kind of PVC double-wall corrugated pipe according to claim 1, is characterized in that the raw materials by weight portion proportioning of described PVC double-wall corrugated pipe is as follows: PVC100 part; DOA25 part; 15 parts, calcium carbonate; 3 parts of triphenyl phosphites; 4 parts, paraffin; DOS20 part; 13 parts of thermo-stabilizers; ABS5 part; 5 parts of titanium dioxide; Antioxidant 1010 is 0.6 part; 25 parts, softening agent; Anti-oxidant DLTP is 0.4 part; 3 parts of polyethylene waxs; 1.5 parts of benzotriazoles; ACR15 part.
4. a kind of PVC double-wall corrugated pipe according to claim 1, is characterized in that: described thermo-stabilizer adopts tribasic lead sulfate or dibasic lead phosphite.
5. a kind of PVC double-wall corrugated pipe according to claim 1, is characterized in that: described softening agent adopts DOP or DBP.
6. a preparation method for PVC double-wall corrugated pipe described in claim 1, is characterized in that, comprises the steps:
The first step: take PVC, DOA, calcium carbonate, triphenyl phosphite, paraffin, DOS, thermo-stabilizer, ABS, titanium dioxide, antioxidant 1010, softening agent, anti-oxidant DLTP, polyethylene wax, DOP and ACR according to parts by weight proportioning;
Second step: PVC, DOA, calcium carbonate, triphenyl phosphite and paraffin are dropped in reactor and is heated to 70-90 DEG C, stir 5-10min, then add surplus stock, be warming up to 100-120 DEG C, stir 10-30min;
The 3rd step: mixed material is dropped in forcing machine and extruded, 170 DEG C, 175 DEG C, 180 DEG C, 185 DEG C, 170 DEG C, 180 DEG C and 185 DEG C of barrel temperatures, 165 DEG C and 175 DEG C of die temperatures, 65 DEG C of extruder temperatures, engine speed 26-34r/min, sawing after cooling and shaping, traction.
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|---|---|---|---|
| CN201410420829.7A CN104194216A (en) | 2014-08-25 | 2014-08-25 | Double-walled PVC (polyvinyl chloride) corrugated tube and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104479247A (en) * | 2014-12-10 | 2015-04-01 | 安徽国通高新管业股份有限公司 | Modified reinforced high-impact-resistance PVC-M (modified polyvinyl chloride) double-wall corrugated pipe |
| CN106280074A (en) * | 2016-08-03 | 2017-01-04 | 安庆市悦发管业有限公司 | A kind of high-strength anti-flaming corrugated tube and processing method thereof |
| CN106566185A (en) * | 2016-10-31 | 2017-04-19 | 无锡市永兴金属软管有限公司 | Inflaming retarding and weather fastness ABS corrugated pipe |
| CN106566109A (en) * | 2016-10-31 | 2017-04-19 | 无锡市永兴金属软管有限公司 | Preparation method of PVC-U double-wall corrugated pipes |
| CN106566177A (en) * | 2016-10-31 | 2017-04-19 | 无锡市永兴金属软管有限公司 | Preparation method of expandable corrugated pipe material for well drilling |
| CN106566178A (en) * | 2016-10-31 | 2017-04-19 | 无锡市永兴金属软管有限公司 | High-temperature-resistant metal corrugated pipe alloy material preparation method |
| CN106566110A (en) * | 2016-10-31 | 2017-04-19 | 无锡市永兴金属软管有限公司 | Preparation method of outdoor weather-resistant and environment-friendly PVC electric wire corrugated pipe material |
| CN106589489A (en) * | 2016-10-28 | 2017-04-26 | 无锡市永兴金属软管有限公司 | Expansion joint and preparation method thereof |
| CN106589765A (en) * | 2016-10-31 | 2017-04-26 | 无锡市永兴金属软管有限公司 | Weather proof ABS corrugated pipe |
| CN107383689A (en) * | 2017-08-04 | 2017-11-24 | 安徽博泰塑业科技有限公司 | Pvc pipe and its preparation technology |
| CN108638469A (en) * | 2018-04-19 | 2018-10-12 | 广东永高塑业发展有限公司 | A kind of manufacturing method dilating stretching Reinforced PVC-M double-wall corrugated pipes |
| CN113652020A (en) * | 2021-08-03 | 2021-11-16 | 安徽杰蓝特新材料有限公司 | Alloy corrugated pipe and processing technology thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104479247A (en) * | 2014-12-10 | 2015-04-01 | 安徽国通高新管业股份有限公司 | Modified reinforced high-impact-resistance PVC-M (modified polyvinyl chloride) double-wall corrugated pipe |
| CN106280074A (en) * | 2016-08-03 | 2017-01-04 | 安庆市悦发管业有限公司 | A kind of high-strength anti-flaming corrugated tube and processing method thereof |
| CN106589489A (en) * | 2016-10-28 | 2017-04-26 | 无锡市永兴金属软管有限公司 | Expansion joint and preparation method thereof |
| CN106566185A (en) * | 2016-10-31 | 2017-04-19 | 无锡市永兴金属软管有限公司 | Inflaming retarding and weather fastness ABS corrugated pipe |
| CN106566109A (en) * | 2016-10-31 | 2017-04-19 | 无锡市永兴金属软管有限公司 | Preparation method of PVC-U double-wall corrugated pipes |
| CN106566177A (en) * | 2016-10-31 | 2017-04-19 | 无锡市永兴金属软管有限公司 | Preparation method of expandable corrugated pipe material for well drilling |
| CN106566178A (en) * | 2016-10-31 | 2017-04-19 | 无锡市永兴金属软管有限公司 | High-temperature-resistant metal corrugated pipe alloy material preparation method |
| CN106566110A (en) * | 2016-10-31 | 2017-04-19 | 无锡市永兴金属软管有限公司 | Preparation method of outdoor weather-resistant and environment-friendly PVC electric wire corrugated pipe material |
| CN106589765A (en) * | 2016-10-31 | 2017-04-26 | 无锡市永兴金属软管有限公司 | Weather proof ABS corrugated pipe |
| CN107383689A (en) * | 2017-08-04 | 2017-11-24 | 安徽博泰塑业科技有限公司 | Pvc pipe and its preparation technology |
| CN108638469A (en) * | 2018-04-19 | 2018-10-12 | 广东永高塑业发展有限公司 | A kind of manufacturing method dilating stretching Reinforced PVC-M double-wall corrugated pipes |
| CN113652020A (en) * | 2021-08-03 | 2021-11-16 | 安徽杰蓝特新材料有限公司 | Alloy corrugated pipe and processing technology thereof |
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Application publication date: 20141210 |