CN105563789A - PE/PVF (Poly Ethylene/Polyvinyl Fluoride) coextrusion pipe and preparation method thereof - Google Patents
PE/PVF (Poly Ethylene/Polyvinyl Fluoride) coextrusion pipe and preparation method thereof Download PDFInfo
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- CN105563789A CN105563789A CN201510908951.3A CN201510908951A CN105563789A CN 105563789 A CN105563789 A CN 105563789A CN 201510908951 A CN201510908951 A CN 201510908951A CN 105563789 A CN105563789 A CN 105563789A
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- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/918—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling
- B29C48/9185—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling in the direction of the stream of the 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- 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
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/904—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using dry calibration, i.e. no quenching tank, e.g. with water spray for cooling or lubrication
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9115—Cooling of hollow articles
- B29C48/912—Cooling of hollow articles of tubular films
- B29C48/913—Cooling of hollow articles of tubular films externally
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/918—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a PE/PVF (Poly Ethylene/Polyvinyl Fluoride) coextrusion pipe and a preparation method thereof. The PE/PVF coextrusion pip is prepared from the following raw materials in weight ratio: 90 to 98 percent of PE resin, and 2 to 10 percent of PVF resin. A layer of PVF resin layer is added on the inner layer or the outer layer of the PE pipe through a coextrusion method, so that the performances such as shock resistance, pressure resistance, creep deformation resistance and ageing resistance of the PE pipe are greatly improved.
Description
Technical field
The invention belongs to plastic pipe and manufacture field, particularly relate to a kind of PE/PVF coextrusion tubing and preparation method thereof.
Background technology
Polyethylene (PE) is typical thermoplastic, because PE tubing has nontoxic, tasteless, odorless, good cold-resistant, heat resistance and chemical stability, higher rigidity and toughness, and good mechanical property, the plurality of advantages such as easy for installation, be widely used in building give, draining, the fields such as buried drain pipe, appendix and telecommunications engineering.But its weak point is, under creep resistance and low temperature condition, its toughness is poor, and along with temperature reduces, its impact resistance is worse and worse, very easily broken when being hit.In use once will there is the accident of a large amount of leak of liquid because external force extruding occurs to rupture, hard PE tubing compressive resistance in the market all has much room for improvement.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of PE/PVF coextrusion tubing and preparation method thereof is provided, improves the weatherability of PE tubing, resistance to pressure, impact resilience etc.
For achieving the above object, the present invention adopts following technical scheme:
Prepare a method for PE/PVF coextrusion tubing, it is characterized in that comprising the following steps:
(1) double-layer coextrusion: PE resin and PVF resin are dropped into respectively in twin-screw unit coextrusion machine or twin-screw two-shipper coextrusion machine hopper, add hot-extrudable after, shaping and export by double-layer coextrusion composite die, feeding rotating speed 10-40RPM, engine speed 200-300RPM, barrel zone temperature 160-225 DEG C, head temperature is 160-225 DEG C;
(2) cool, draw, cut, obtain PE/PVF coextrusion tubing.
Preferably, be cooled to Vacuum shaping cooling, step is as follows: adopt airless injection water smoke to carry out instantaneous temperature reduction, water temperature divides three sections, first paragraph water temperature is at 60-80 DEG C and spray 2-5min, and second segment water temperature is at 10-30 DEG C and spray 5-10min, and the 3rd section of water temperature is at 5-8 DEG C and spray 5-10min, water can circulating and recovering, and vacuum remains on-0.2-0.1MPa.
The present invention also provides a kind of PE/PVF coextrusion tubing, it is characterized in that, is made up of the raw material of following mass ratio range:
PE resin 90-98%
PVF resin 2-10%.
Preferably, the preparation method of above-mentioned PE/PVF coextrusion tubing, is characterized in that comprising the following steps:
(1) double-layer coextrusion: PE resin and PVF resin are dropped in twin-screw unit coextrusion machine or twin-screw two-shipper coextrusion machine hopper by weight respectively, add hot-extrudable after, shaping and export by double-layer coextrusion composite die, feeding rotating speed 10-40RPM, engine speed 200-300RPM, barrel zone temperature 160-225 DEG C, head temperature is 160-225 DEG C;
(2) Vacuum shaping cooling: adopt airless injection water smoke to carry out instantaneous temperature reduction, water temperature divides three sections, first paragraph water temperature is at 60-80 DEG C and spray 2-5min, second segment water temperature is at 10-30 DEG C and spray 5-10min, 3rd section of water temperature is at 5-8 DEG C and spray 5-10min, water can circulating and recovering, and vacuum remains on-0.2-0.1MPa;
(3) draw, cutting, obtains PE/PVF coextrusion tubing.
Preferably, the skin of described PE/PVF coextrusion tubing is PE layer, and internal layer is PVF layer; Or skin is PVF layer, internal layer is PE layer.
Preferably, PVF resin bed is 10-20 μm.
PVF resin is formed by the EVA extruding of fluorine and fluorine carbon molecule.For copolymer that is fluorine-containing or fluorine carbon, than any polymer, there is larger chemical binding force and structural stability.PVF film towards horizontal and vertical stretching, extension, thus forms molecular grating, substantially increases its physical property.The resistance of PVF film counterglow, chemical solvent, acid and alkali corrosion, moisture and oxidation and durability improve significantly.Extruded PVF film smooth surface is fine and smooth, completely without striped, orange peel, micro-wrinkle and so on the defect that surface when roller coating or spraying produces.Adopt the PE/PVF coextrusion tubing that PE-PVF coextrusion is made, the interface of PVF layer and PE layer can be good at fusing and bonding, and can not cause the layering of tubing and come off.
The coextrusion technology adopted in the present invention is the technology that this area is commonly used, as Chinese patent application CN103388712A discloses a kind of composite pipe, it is gone out to form by singe screw double-layer coextrusion by outer anti-aging layer and internal layer refractory layer, in addition, Chinese patent application CN201721024U discloses a kind of compound co-extrusion conical screw extruder, achieve double-layer coextrusion, reduce coextrusion unit host number, save investment and occupation area of equipment.These two parts of files are attached to herein by reference.
The invention has the beneficial effects as follows: the PE/PVF tubing that the present invention produces, adopt the method for coextrusion to the addition of one deck PVF resin bed at the internal layer of PE tubing or skin, substantially increase the shock resistance of tubing, resistance to pressure, resistance to creep, the performance such as anti-aging.
Detailed description of the invention
Embodiment 1
A kind of PE/PVF coextrusion tubing, be made up of following raw material by weight:
PE resin 98%
PVF resin 2%.
A preparation method for PE/PVF coextrusion tubing, comprises the following steps:
(1) double-layer coextrusion: PE resin and PVF resin are discharged in twin-screw unit coextrusion machine hopper by feeder, add hot-extrudable after, shaping and export by double-layer coextrusion composite die, PE is internal layer, and PVF resin is outer, and PVF resin bed is 10 μm, feeding rotating speed 10RPM, engine speed 200RPM, barrel zone temperature 180 DEG C, head temperature is 210 DEG C;
(2) Vacuum shaping cooling: adopt airless injection water smoke to carry out instantaneous temperature reduction, water temperature divides three sections, first paragraph water temperature is at 60 DEG C and spray 2min, second segment water temperature is at 10 DEG C and spray 5min, 3rd section of water temperature is at 5 DEG C and spray 5min, and water can circulating and recovering, and vacuum remains on-0.04MPa;
(3) draw, cutting, obtains PE/PVF coextrusion tubing.
Embodiment 2
A kind of PE/PVF coextrusion tubing, be made up of following raw material by weight:
PE resin 94%
PVF resin 6%.
A preparation method for PE/PVF coextrusion tubing, comprises the following steps:
(1) double-layer coextrusion: PE resin and PVF resin are discharged in twin-screw unit coextrusion machine hopper by feeder, add hot-extrudable after, shaping and export by double-layer coextrusion composite die, PE resin is internal layer, and PVF resin is outer, and PVF resin bed is 15 μm, feeding rotating speed 25RPM, engine speed 250RPM, barrel zone temperature 190 DEG C, head temperature is 210 DEG C;
(2) Vacuum shaping cooling: adopt airless injection water smoke to carry out instantaneous temperature reduction, water temperature divides three sections, first paragraph water temperature is at 70 DEG C and spray 3min, second segment water temperature is at 50 DEG C and spray 7min, 3rd section of water temperature is at 6 DEG C and spray 7min, and water can circulating and recovering, and vacuum remains on-0.04MPa;
(3) draw, cutting, obtains PE/PVF coextrusion tubing.
Embodiment 3
A kind of PE/PVF coextrusion tubing, be made up of following raw material by weight:
PE resin 90%
PVF resin 10%.
A preparation method for PE/PVF coextrusion tubing, comprises the following steps:
(1) double-layer coextrusion: PE resin and PVF resin are discharged in twin-screw unit coextrusion machine hopper by feeder, add hot-extrudable after, shaping and export by double-layer coextrusion composite die, PVF resin is internal layer, and PE resin is outer, and PVF resin bed is 20 μm, feeding rotating speed 40RPM, engine speed 300RPM, barrel zone temperature 185 DEG C, head temperature is 225 DEG C;
(2) Vacuum shaping cooling: adopt airless injection water smoke to carry out instantaneous temperature reduction, water temperature divides three sections, first paragraph water temperature is at 80 DEG C and spray 5min, second segment water temperature is at 30 DEG C and spray 10min, 3rd section of water temperature is at 8 DEG C and spray 10min, water can circulating and recovering, and vacuum remains on-0.05MPa;
(3) draw, cutting, obtains PE/PVF coextrusion tubing.
Embodiment 4
Various embodiments of the present invention PE/PVF coextrusion pipe performance testing result is as shown in the table:
Claims (6)
1. prepare a method for PE/PVF coextrusion tubing, it is characterized in that comprising the following steps:
(1) double-layer coextrusion: PE resin and PVF resin are dropped into respectively in twin-screw unit coextrusion machine or twin-screw two-shipper coextrusion machine hopper, add hot-extrudable after, shaping and export by double-layer coextrusion composite die, feeding rotating speed 10-40RPM, engine speed 200-300RPM, barrel zone temperature 160-225 DEG C, head temperature is 160-225 DEG C;
(2) cool, draw, cut, obtain PE/PVF coextrusion tubing.
2. a kind of method preparing PE/PVF coextrusion tubing according to claim 1, it is characterized in that, described is cooled to Vacuum shaping cooling, step is as follows: adopt airless injection water smoke to carry out instantaneous temperature reduction, water temperature divides three sections, and first paragraph water temperature is at 60-80 DEG C and spray 2-5min, second segment water temperature is at 10-30 DEG C and spray 5-10min, 3rd section of water temperature is at 5-8 DEG C and spray 5-10min, and water can circulating and recovering, and vacuum remains on-0.2-0.1MPa.
3. a PE/PVF coextrusion tubing, is characterized in that, is made up of following raw material by weight:
PE resin 90-98%
PVF resin 2-10%.
4. prepare a method for PE/PVF coextrusion tubing according to claim 3, it is characterized in that comprising the following steps:
(1) double-layer coextrusion: PE resin and PVF resin are dropped in twin-screw unit coextrusion machine or twin-screw two-shipper coextrusion machine hopper by weight respectively, add hot-extrudable after, shaping and export by double-layer coextrusion composite die, feeding rotating speed 10-40RPM, engine speed 200-300RPM, barrel zone temperature 160-225 DEG C, head temperature is 160-225 DEG C;
(2) Vacuum shaping cooling: adopt airless injection water smoke to carry out instantaneous temperature reduction, water temperature divides three sections, first paragraph water temperature is at 60-80 DEG C and spray 2-5min, second segment water temperature is at 10-30 DEG C and spray 5-10min, 3rd section of water temperature is at 5-8 DEG C and spray 5-10min, water can circulating and recovering, and vacuum remains on-0.2-0.1MPa;
(3) draw, cutting, obtains PE/PVF coextrusion tubing.
5. method according to claim 4, is characterized in that, the skin of described PE/PVF coextrusion tubing is PE layer, and internal layer is PVF layer; Or skin is PVF layer, internal layer is PE layer.
6. method according to claim 4, is characterized in that, PVF resin bed is 10-20 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510908951.3A CN105563789A (en) | 2015-12-09 | 2015-12-09 | PE/PVF (Poly Ethylene/Polyvinyl Fluoride) coextrusion pipe and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510908951.3A CN105563789A (en) | 2015-12-09 | 2015-12-09 | PE/PVF (Poly Ethylene/Polyvinyl Fluoride) coextrusion pipe and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN105563789A true CN105563789A (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510908951.3A Pending CN105563789A (en) | 2015-12-09 | 2015-12-09 | PE/PVF (Poly Ethylene/Polyvinyl Fluoride) coextrusion pipe and preparation method thereof |
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| CN (1) | CN105563789A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388712A (en) * | 2013-07-11 | 2013-11-13 | 东台市天龙塑料制品厂 | Composite pipe and preparation method thereof |
| CN104960251A (en) * | 2015-06-10 | 2015-10-07 | 中国石油化工股份有限公司 | High-barrier multilayer composite thermoplastic plastic tube and production method thereof |
| CN104974394A (en) * | 2014-04-11 | 2015-10-14 | 中国石化扬子石油化工有限公司 | Polyethylene resin composition and preparation method thereof |
-
2015
- 2015-12-09 CN CN201510908951.3A patent/CN105563789A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388712A (en) * | 2013-07-11 | 2013-11-13 | 东台市天龙塑料制品厂 | Composite pipe and preparation method thereof |
| CN104974394A (en) * | 2014-04-11 | 2015-10-14 | 中国石化扬子石油化工有限公司 | Polyethylene resin composition and preparation method thereof |
| CN104960251A (en) * | 2015-06-10 | 2015-10-07 | 中国石油化工股份有限公司 | High-barrier multilayer composite thermoplastic plastic tube and production method thereof |
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Application publication date: 20160511 |
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