CN106366502A - Off-line two-way stretched PVC(Polyvinyl Chloride) pipe preparation method and device - Google Patents
Off-line two-way stretched PVC(Polyvinyl Chloride) pipe preparation method and device Download PDFInfo
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- CN106366502A CN106366502A CN201610760905.8A CN201610760905A CN106366502A CN 106366502 A CN106366502 A CN 106366502A CN 201610760905 A CN201610760905 A CN 201610760905A CN 106366502 A CN106366502 A CN 106366502A
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- cylinder
- pvc
- pipe
- polyvinyl chloride
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- 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
-
- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/22—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes
- B29C55/26—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes biaxial
-
- 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
-
- 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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses an off-line two-way stretched PVC(Polyvinyl Chloride) pipe preparation method. The preparation method comprises the following steps: pre-mixing PVC, a heat stabilizing agent, an impact resistant modifier, a lubricating agent, composite packing powder and titanium dioxide to obtain hard PVC premixed powder; adding the premixed powder into an extruding machine, and sizing, cooling, drawing and cutting at the temperature of 160 to 190 DEG C; forming a ventilating combination by arranging a PVC-U pipe on the outer side of a silicone rubber pipe in a sleeving manner, wherein each of the two ends of the silicone rubber pipe is connected with a pressurizing air valve through a clamp-type seal; placing the whole body of the ventilating combination into a cylinder of an air cylinder, and sealing through a cylinder cover with a fixable pull rod to form a blowing device; placing the blowing device in a constant temperature drying oven for 0.1 to 3 hours at 110 to 120 DEG C, taking out the pipe, and pressurizing until the pipe is expanded to adhere the inner wall of the cylinder after the pipe is preheated to reach an expanded state, so that the two-way stretched high-performance PVC pipe is obtained. The performance of the PVC pipe is improved; raw materials are saved; the cost is reduced.
Description
Technical field
The present invention relates to a kind of preparation method of offline polyvinyl chloride pipe stretched in two directions and device, belong to Polymer Processing
Forming field.
Background technology
Biaxial tension polrvinyl chloride (pvc-o) tubing due to possessing excellent performance, significant Social and economic benef@, and
Meet the general orientation of sustainable development, and obtain the attention of global plastic conduit industry, and in Britain, France, Holland, U.S.
State, Australia, South Africa and Japan and other countries start to apply.
At present, online (on-line) technique of the preparation of biaxial tension polyvinyl chloride pipe, is on pipe production line, will
The pvc-u tubing of extrusion molding continues through axial direction, biaxial orientation is realized in radial drawing, and cooling and shaping becomes pvc-o pipe
Material.Patent cn101537712a, cn101670664a all discloses a kind of online biaxial tension pvc tubing continuous production processes,
Its technique is all similar, and processing step is complicated, and then needs a kind of simply offline (off- of cost-effective device structure
Line) technique
Content of the invention
The present invention provides a kind of axial fixed length, the preparation side of the offline polyvinyl chloride pipe stretched in two directions of uniform pressurization expansion
Method, the apparatus structure that the method uses is simple, easy to implement, and after effectively improving pvc tubing drawn, the monolateral of appearance is asked
Topic hence it is evident that lifting pvc pipe performance, save material, reduces cost.
For achieving the above object, technical scheme is as follows:
A kind of preparation method of offline polyvinyl chloride pipe stretched in two directions, its step is as follows:
(1) by 100 parts of polrvinyl chloride, 1～5 part of heat stabilizer, 1～6 part of impact modifier, 0.4～1.0 part of lubricant,
4～8 parts of compounded mix and 1.5～3.0 parts of titanium dioxide carry out premix and obtain RPVC premix powders；
Wherein heat stabilizer is one of tribasic lead sulfate, dibasic lead stearate, lead stearate or 2-3 kind
The mixture of arbitrary proportion, impact modifier is esters of acrylic acid, chlorinated polyethylene, acrylic acid, butadiene or styrene copolymerized
One of thing or the mixture of 2-5 kind arbitrary proportion, lubricant is one of paraffin, Tissuemat E or two kinds of arbitrary proportions
Mixture, compounded mix is one or more of precipitated calcium carbonate, ground calcium carbonate, superfine glass beads or Pulvis Talci 2-
The mixture of 4 kinds of arbitrary proportions；
(2) above-mentioned RPVC premix powders are added conical double screw extruder, in 160～190 DEG C of bars of temperature
Pvc-u tubing through accomplished axial tensions of conventional process such as sizing, cooling, traction, cuttings under part；
(3) intercept one section of pvc-u tubing, be enclosed within external diameter and be slightly less than composition ventilation combination outside the silicone rubber tube of pipe internal diameter,
Silicone rubber tube two is terminated with the pressurizeed air valve being tightly connected by clamping hoop type, and it is tube outer diameter that ventilation composite entity is placed in internal diameter
In 1.6～2.0 times of cylinder barrel, by with can the cylinder cap of steady brace be sealed, forming huffing device；
(4) single unit system is placed in 110～120 DEG C of constant temperature oven 0.1～3h, treats in cylinder barrel that tubing preheating reaches soft
Change can be taken out and ventilate, realize tubing Uniform Tension by the expansion of internal layer silicone rubber tube after inflation state, and pressure is 0.40～
0.80mpa, compression rate 0.025mpa/s；
(5) treat that tubing is expanded to after the completion of pressurizeing to fit with inner wall of cylinder, after pressurize cooling, take out biaxial tension pvc pipe
Material, by verification experimental verification, biaxial tension pvc pipe performance has obtained significantly being lifted.
A kind of huffing device, including cylinder barrel, cylinder cap, air valve joint, air valve, silicone rubber tube, steady brace and clip,
Described cylinder barrel two ends are connected with cylinder cap, and cylinder barrel outer wall arranges steady brace, and the two ends of steady brace are threaded
And it is each passed through through hole on the cylinder cap at two ends, the screw thread of steady brace is screwed into nut by cylinder cap and compression cylinder cylinder barrel, gas
Axially disposed concentric silicone rubber tube in cylinder cylinder barrel, silicone rubber tube and air valve joint are attached by clip and in joint
Keep sealing, air valve joint is connected with air valve.
Compared with prior art, the beneficial effect of the application is:
Apparatus structure is simple, easy to implement, it is possible to achieve automated production, and production adaptative ability is strong, adapts to various formula
Pvc tubing realize double drawing effect.The monolateral problem occurring after pvc tubing drawn can effectively be improved is hence it is evident that lifting pvc manages
Material performance, save material, reduces cost, there is obvious economic benefit and social benefit.
Brief description
Fig. 1 is the huffing device schematic diagram realizing pvc-u tubing radial drawing；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is a-a profile in Fig. 2.
In figure: 1 cylinder barrel, 2pvc-u tubing, 3 silicone rubber tubes, 4 steady braces, 5 air valves, 6 clips, 7 air valve joints,
8. cylinder cap.
Specific embodiment
As Figure 1-3, the huffing device used by following examples includes as lower component: cylinder barrel 1, cylinder cap 8, air valve
Joint 7, air valve 5, silicone rubber tube 3, steady brace 4 and clip 6, described cylinder barrel 1 two ends are connected with cylinder cap 8, cylinder cylinder
Cylinder 1 outer wall setting steady brace 4, the two ends of steady brace 4 are threaded and are each passed through the through hole on the cylinder cap 8 at two ends, Gu
Nut is screwed on the screw thread determining pull bar 4 by cylinder cap and compression cylinder cylinder barrel, axially disposed concentric silicone rubber in cylinder barrel
Pipe 3, air valve joint 7 is fixed using concentric circular internal fastening type structure with cylinder cap 8, and silicone rubber tube 3 passes through clip with air valve joint 7
6 are attached and keep sealing in joint, and air valve joint 7 is connected with air valve 5.
Embodiment 1:
A kind of preparation method of offline polyvinyl chloride pipe stretched in two directions, its step is as follows:
By 100 parts of polrvinyl chloride, 3 parts of tribasic lead sulfate, 1.5 parts of acrylic acid, 2 parts of butadiene, 1.0 parts of paraffin, gently
8 parts of matter Calcium Carbonate and 3 parts of titanium dioxide carry out premix and obtain RPVC premix powders；Then RPVC is pre-
Mixed powder adds hypercone double screw extruder, obtains through conventional process such as sizing, cooling, traction, cuttings under the conditions of 160 DEG C of temperature
To the pvc-u tubing realizing axial tension；Intercept one section of tubing, be enclosed within outside silicone rubber tube composition ventilation combination, and by group of ventilating
Conjunction is integrally placed in cylinder barrel, is screwed fixation and the sealing that device realized by pull bar；Through constant temperature oven (temperature 115
± 2 DEG C) heat taking-up after 0.3h, uniformly ventilation is forced into 0.45mpa；Treat after the completion of pressurization that tubing is expanded to and inner wall of cylinder patch
Close, after pressurize cooling, take out biaxial tension pvc tubing, line pipe of going forward side by side material performance verification (result sees attached list 1).
Embodiment 2:
A kind of preparation method of offline polyvinyl chloride pipe stretched in two directions, its step is as follows:
By 100 parts of polrvinyl chloride, 2 parts of dibasic lead stearate, 1.2 parts of acrylate, 0.8 part of paraffin, lightweight carbonic acid
6 parts of calcium and 2.0 parts of titanium dioxide carry out premix and obtain RPVC premix powders, then add hypercone double premix powders
Screw extruder, through accomplished axial tensions of conventional process such as sizing, cooling, traction, cuttings under the conditions of 190 DEG C of temperature
Pvc-u tubing；Intercept one section of tubing, be enclosed within composition ventilation combination outside silicone rubber tube, and ventilation composite entity is placed in cylinder cylinder
In cylinder, it is screwed fixation and the sealing that device realized by pull bar；Take after constant temperature oven (115 ± 2 DEG C of temperature) heating 1h
Go out, uniformly ventilation is forced into 0.65mpa；Treat after the completion of pressurization that tubing is expanded to fit with inner wall of cylinder, after pressurize cooling, take out
Biaxial tension pvc tubing, line pipe of going forward side by side material performance verification (result sees attached list 1).
Embodiment 3:
A kind of preparation method of offline polyvinyl chloride pipe stretched in two directions, its step is as follows:
By 100 parts of polrvinyl chloride, 3 parts of lead stearate, 2 parts of acrylate, 0.7 part of Tissuemat E, 5 parts of precipitated calcium carbonate with
And 3.0 parts of titanium dioxide carries out premix and obtains RPVC premix powders, then premix powders addition hypercone twin screw is squeezed
Go out machine, the pvc-u through accomplished axial tensions of conventional process such as sizing, cooling, traction, cuttings under the conditions of 180 DEG C of temperature
Tubing；Intercept one section of tubing, be enclosed within composition ventilation combination outside silicone rubber tube, and ventilation composite entity is placed in cylinder barrel,
It is screwed fixation and the sealing that device realized by pull bar；Take out after constant temperature oven (115 ± 2 DEG C of temperature) heating 1.5h,
Uniformly ventilation is forced into 0.80mpa；Treat after the completion of pressurization that tubing is expanded to fit with inner wall of cylinder, after pressurize cooling, obtaining property
The biaxial tension pvc tubing that can improve.
Other embodiments dispensing is as follows:
The preparation method of embodiment 4,5,6,7,8 is same as Example 1.
Performance test (according to the execution of iso16422:2014 standard) after subordinate list 1 pvc tubing biaxial tension
Claims (6)
1. a kind of preparation method of offline polyvinyl chloride pipe stretched in two directions, its step is as follows:
(1) by 100 parts of polrvinyl chloride, 1 ~ 5 part of heat stabilizer, 1 ~ 6 part of impact modifier, 0.4 ~ 1.0 part of lubricant, compounded mix
4 ~ 8 parts and 1.5 ~ 3.0 parts of titanium dioxide carry out premix and obtain RPVC premix powders；
(2) above-mentioned premix powders are added conical double screw extruder, through shaping, cooling down, lead under the conditions of 160 ~ 190 DEG C of temperature
Draw, cut and obtain axial tension pvc-u tubing；
(3) intercept one section of pvc-u tubing, be enclosed within external diameter and be less than composition ventilation combination, silicon outside the silicone rubber tube of pvc-u pipe internal diameter
Rubber tube terminal is connected to pressurization air valve；Ventilation composite entity is placed in the cylinder cylinder that internal diameter is 1.6 ~ 2.0 times of pvc-u tube outer diameter
In cylinder, sealed by cylinder cap, formed huffing device；
(4) huffing device is placed in 110 ~ 120 DEG C of constant temperature oven 0.1-3h, from calorstat, then takes out huffing device and ventilate
Pressurization, pressure is 0.40 ~ 0.80mpa；Treat after the completion of pressurization that tubing is expanded to fit with cylinder barrel inwall, pressurize 0.1 ~
After 30min cooling, obtain polyvinyl chloride pipe stretched in two directions.
2. according to a kind of offline polyvinyl chloride pipe stretched in two directions described in claim 1 preparation method it is characterised in that: institute
The heat stabilizer stated be one of tribasic lead sulfate, dibasic lead stearate or lead stearate or 2-3 kind arbitrarily than
The mixture of example.
3. according to a kind of offline polyvinyl chloride pipe stretched in two directions described in claim 1 preparation method it is characterised in that: institute
The impact modifier stated is one of esters of acrylic acid, chlorinated polyethylene, acrylic acid, butadiene or styrol copolymer or 2-
The mixture of 5 kinds of arbitrary proportions.
4. according to a kind of offline polyvinyl chloride pipe stretched in two directions described in claim 1 preparation method it is characterised in that: institute
The lubricant stated is the mixture of one of paraffin, Tissuemat E or two kinds of arbitrary proportions.
5. according to a kind of offline polyvinyl chloride pipe stretched in two directions described in claim 1 preparation method it is characterised in that: institute
The compounded mix stated be one of precipitated calcium carbonate, ground calcium carbonate, superfine glass beads or Pulvis Talci or 2-4 kind arbitrarily than
The mixture of example.
6. realize the huffing device of the preparation method described in any one of claim 1-5 it is characterised in that including cylinder barrel
(1), cylinder cap (8), air valve joint (7), air valve (5), silicone rubber tube (3), steady brace (4) and clip (6), described cylinder cylinder
Cylinder (1) two ends are connected with cylinder cap (8), cylinder barrel (1) outer wall setting steady brace (4), the two ends setting spiral shell of steady brace (4)
Stricture of vagina is simultaneously each passed through through hole on the cylinder cap (8) at two ends, the screw thread of steady brace (4) is screwed into nut by cylinder cap and compression cylinder
Cylinder barrel, axially disposed concentric silicone rubber tube (3) in cylinder barrel, silicone rubber tube (3) passes through clip with air valve joint (7)
(6) it is attached and keeps sealing in joint, air valve joint (7) is connected with air valve (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610760905.8A CN106366502B (en) | 2016-08-29 | 2016-08-29 | A kind of preparation method and device of offline polyvinyl chloride pipe stretched in two directions |
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| CN201610760905.8A CN106366502B (en) | 2016-08-29 | 2016-08-29 | A kind of preparation method and device of offline polyvinyl chloride pipe stretched in two directions |
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| CN106366502B CN106366502B (en) | 2018-05-18 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1231632A (en) * | 1996-09-26 | 1999-10-13 | 阿尔法康公司 | Method and installation for treating plastic tubes with bi-axial drawing |
| CN1231634A (en) * | 1996-09-26 | 1999-10-13 | 阿尔法康公司 | Method and installation for making plastic tubes with bi-axial drawing, resulting plastic tube |
| CN101670665A (en) * | 2009-10-19 | 2010-03-17 | 杭州波达塑料科技股份有限公司 | Online biaxial-orienting PVC extrusion molding mould |
| CN103358423A (en) * | 2013-07-19 | 2013-10-23 | 内蒙古亿利塑业有限责任公司 | Method for producing orientation polyvinyl chloride pipe by two steps |
-
2016
- 2016-08-29 CN CN201610760905.8A patent/CN106366502B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1231632A (en) * | 1996-09-26 | 1999-10-13 | 阿尔法康公司 | Method and installation for treating plastic tubes with bi-axial drawing |
| CN1231634A (en) * | 1996-09-26 | 1999-10-13 | 阿尔法康公司 | Method and installation for making plastic tubes with bi-axial drawing, resulting plastic tube |
| CN101670665A (en) * | 2009-10-19 | 2010-03-17 | 杭州波达塑料科技股份有限公司 | Online biaxial-orienting PVC extrusion molding mould |
| CN103358423A (en) * | 2013-07-19 | 2013-10-23 | 内蒙古亿利塑业有限责任公司 | Method for producing orientation polyvinyl chloride pipe by two steps |
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| CN106366502B (en) | 2018-05-18 |
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