CN103817897A - Production method for double resistant plastic pipe - Google Patents
Production method for double resistant plastic pipe Download PDFInfo
- Publication number
- CN103817897A CN103817897A CN201410059373.6A CN201410059373A CN103817897A CN 103817897 A CN103817897 A CN 103817897A CN 201410059373 A CN201410059373 A CN 201410059373A CN 103817897 A CN103817897 A CN 103817897A
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- Prior art keywords
- production method
- resin
- plastic pipe
- layer
- dual anti
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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
- B29C48/16—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
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
Abstract
The invention relates to a production method for a double resistant plastic pipe. The production method comprises the following steps of (1) preparing an A layer material containing a resin, a conductive filler and a fire retardant and a B layer material containing a tough resin, sending melts of the two materials into a flow combiner (III) to form an AB bilayer composite; (2) flowing a melt of the AB bilayer composite obtained by the step (1) into a mold head (IV) which has a channel divided into two parts and allows the melt to rotate oppositely from the flow combiner (III) to obtain an ABBA four-layer composite; (3) flowing the ABBA four-layer composite obtained by the step (2) into a laminator (V) with K equally divided channels to prepare an AB(BA)KBA laminated composite melt, K being an integer of 2-6; and (4) sending the AB(BA)KBA laminated composite melt obtained by the step (3) into a pipe shaping mold (VI), the AB(BA)KBA laminated composite melt with rectangular cross section is converged and shaped in a wedge shape to obtain an AB(BA)KBA structure, both the inner surface and the outer surface of the AB(BA)KBA structure having anti-static and flame retardant double resistant plastic pipes, and then sizing, cooling and cutting at constant lengths.
Description
Technical field
The present invention relates to a kind of dual anti-(antistatic, fire-retardant) plastic pipe production method, particularly stacked dual anti-(antistatic, fire-retardant) plastic pipe production method.
Background technology
For a long time, colliery, metallic ore or nonmetallic ore adopt cast-iron pipe to carry out plumbing, ventilation, dust suction and conveying Tailings Slurry always.There is the defects such as perishable, carrying and installation inconvenience, cost of upkeep height due to cast iron pipe itself, therefore replace cast iron pipe in the urgent need to a kind of novel tube, need to improve or with other more preferably material substituted.Reduce mining industry steel consumption, the good approach reducing labor intensity to mould Dai Gang.Engineering plastics light weight, wear-resisting, corrosion-resistant, long service life, have good insulating properties to electricity, heat, is easy to machine-shaping, so the application in colliery is comparatively extensive.But its good insulating properties can make frosting gather a large amount of static, is easy to produce electric spark, under mine, in the methane gas atmosphere of high concentration, running into naked light will set off an explosion.In order to guarantee safety in production, the tubing that these fields are used requires to have well antistatic and fire resistance, with the generation of Accident prevention.
Polyethylene (PE) tubing has good toughness, but often needs to add a large amount of fire retardants and antistatic additive, causes the increase of cost increase and adding ingredient to reduce the physical property of PE tubing.Polyvinyl chloride (PVC) material has price advantage, and PVC-U tubing uses in a large number at mine.Along with the development in pvc pipe road, the shortcoming of PVC-U also comes out, and is mainly manifested in: PVC-U is a kind of fragile material, and rapid crack propagation easily occurs.PVC-U tubing has high-modulus, high strength and lower price advantage, has covered the shortcoming of the low toughness of PVC-U.Toughness deficiency is that fragility is large, and impact property and anti-cracking performance are poor, and brittle break easily occurs in the time being subject to the external world and impacting energetically.In actual application, particularly in the mining area of complex geologic conditions, the stone riprap in stone, the ore deposit of falling easily destroys PVC-U tubing.Therefore, keep the premium properties of the original high strength of PVC-U, high-modulus, improve the shortcoming of its toughness deficiency, improving its impact resilience and splitting resistance is urgent problem.
Summary of the invention
The present invention adopts stacked sandwich construction to prepare tubing, can make plastic pipe functionalization.By being prepared to tubing, the stacked coextrusion of PVC and toughness material can increase toughness and the impact resistance of pvc pipe material, keep the premium properties of the original high strength of PVC, high-modulus, improve the shortcoming of its toughness deficiency, improve its impact resilience and splitting resistance, breaking through PVC-U and use limitation, is also the major technological breakthrough that PVC-U tubing is manufactured field.
For the stacked coextrusion plastic pipe of PE, can significantly reduce the consumption of antistatic additive, fire retardant, reduce costs and can significantly improve the performance of the stacked composite pipe of PE.
Use stacked device can make conductive material and fire retardant carry out the dispersed use amount that can reduce again, can improve molecular chain orientation, improve the mechanical property of tubing simultaneously.Use stacked device can reduce the quantity of extruder, use stacked device can also make the multiple tube number of plies increase, improve dual anti-(antistatic, fire-retardant) performance.
The production method that the object of the invention is to propose a kind of antistatic, good flame retardation effect, mechanical strength is high, production cost is low stacked dual anti-plastic pipe, the method comprises the following steps:
(1) resin raw material and conductive filler are mixed in mixer to then plastifying fusion in extruder I, preparation A layered material with fire retardant; By toughened resin plastifying fusion in extruder II, preparation B layered material, sends into two kinds of melts in junction station III, merges into AB two-layer compound body;
(2) AB two-layer compound melt step (1) being obtained flows into and has the runner of being divided into two from junction station III, and makes the die head IV of melt subtend rotation, obtains four layers of compounding flux of ABBA;
(3) four layers of compounding flux of ABBA step (2) being obtained flow in the stacked device V with K runner such as grade, are prepared into AB (BA)
kbA layer compounding flux, the integer that wherein K is 2-6;
(4) AB (BA) step (3) being obtained
kbA layer compounding flux sent in tubular article formation mould VI, the AB (BA) that cross section is rectangle
kbA layer compounding flux converges moulding with wedge shape and obtains AB (BA)
kbA structure, the dual anti-tubing of anti-electrostatic fire retardant is all had in interior outside, and then the cooling fixed length of sizing cuts.
Further, the A layer of the described tubing exposure in composite pipe all the time.
Further, the quality of described resin raw material and conductive black and fire retardant is 90:10:2.
Further, described conductive filler selects free graphite, carbon black, carbon fiber, CNT, Graphene; Metal dust, metal fragment, metallic fiber; Gold-plated glass fibre, and be coated with one or more the mixture in the group of mica composition of nickel plating, silver, copper, chromium.
Further, described fire retardant is selected from inorganic combustion inhibitor or organic fire-retardant.
Further, described fire retardant is Halogen phosphorus flame retardant.
Further, the toughened resin of described B layered material or with A layered material in the resin-phase that uses with, or the resin of the resin using in A layered material after modification, or with A layered material in the resin that uses there is the resin of close melt index.
Further, the resin in described A, B layer is selected from PVC, PE, PP, CPE.
Further, the resin in described A, B layer is PVC or PE.
Further, in described tubing, total number of plies of A, B layer is 8-70.
The good effect that the present invention has: (1) the inside and outside layer of dual anti-(antistatic, fire-retardant) of the present invention plastic pipe is anti-electrostatic fire retardant layer, remainder layer is alternately to be formed by antistatic, flame-retardant layer and B layer, and the antistatic flame-resistant pipe of this structure has less specific insulation.(2) stacked dual anti-plastic pipe of the present invention only need add a small amount of conductive filler and fire retardant in A layer, in reaching good conductive effect, the addition of conductive filler, fire retardant be common dual anti-tubing half even still less, greatly reduce like this addition of conductive filler, not only saved cost of material but also the Effect on Mechanical Properties of plastic pipe is reduced seldom.(3) in stacked dual anti-plastic pipe of the present invention, can use toughness material as B layer, the composite pipe of preparation has good intensity and toughness, make antistatic pipes of the present invention compared with traditional antistatic pipes, antistatic property excellence has good toughness simultaneously, has reduced tubing cracking defect.
Accompanying drawing explanation
Fig. 1 is the dual anti-tubing preparation flow of the present invention schematic diagram.
Fig. 2 is the dual anti-pipe structure schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in more detail
Stacked dual anti-PVC-U tubing of the present invention is eight layers of structure of ABABBABA.Anti-electrostatic fire retardant layer A is by PVC and conductive black and a small amount of mixing forming of fire retardant.Functional layer B is the PVC by CPE modification, and the specific insulation of the dual anti-PVC-U tubing of the present embodiment is less than 10
6Ω m.
Stacked dual anti-PVC-U tube forming method of the present invention is as follows:
(1) join after PVC is mixed according to the ratio of 90:10:2 with conductive black and fire retardant and in extruder I, carry out fusion plastification, the PVC of CPE modification is joined simultaneously and in extruder II, carry out fusion plastification, melt after plasticizing is good is transported to respectively in junction station III, merges into AB compounding flux.Each section of temperature of extruder I and extruder II is all set as: 140 ℃, a district; Two 150 ℃, districts; Three 165 ℃, districts; Four 170 ℃, districts; Five 175 ℃, districts.The screw speed of extruder I and extruder II is than being 1:1.
(2) above-mentioned AB compounding flux is transported to and has the runner of being divided into two from the outlet of junction station III, and the die head IV of melt subtend rotation, thereby obtain four layers of compounding flux of ABBA, the temperature of die head IV is 180 ℃.
(3) tetra-layers of melt Conveying of ABBA obtained above are divided in four stacked device V to having one, thereby obtain 16 layers of compounding flux of ABBAABBAABBAABBA, the temperature of stacked device V is 180 ℃.
(4) 16 layers of compounding flux obtained above are delivered in tubular article formation mould VI, sizing cooling forming obtains the stacked dual anti-PVC-U tubing of 16 layers.
Claims (10)
1. a production method for dual anti-plastic pipe, comprises the following steps:
(1) resin raw material and conductive filler are mixed in mixer to then plastifying fusion in extruder I, preparation A layered material with fire retardant; By toughened resin plastifying fusion in extruder II, preparation B layered material, sends into two kinds of melts in junction station III, merges into AB two-layer compound body;
(2) AB two-layer compound melt step (1) being obtained flows into and has the runner of being divided into two from junction station III, and makes the die head IV of melt subtend rotation, obtains four layers of compounding flux of ABBA;
(3) four layers of compounding flux of ABBA step (2) being obtained flow in the stacked device V with K runner such as grade, are prepared into AB (BA)
kbA layer compounding flux, the integer that wherein K is 2-6;
(4) AB (BA) step (3) being obtained
kbA layer compounding flux sent in tubular article formation mould VI, the AB (BA) that cross section is rectangle
kbA layer compounding flux converges moulding with wedge shape and obtains AB (BA)
kbA structure, the dual anti-tubing of anti-electrostatic fire retardant is all had in interior outside, and then the cooling fixed length of sizing cuts.
2. the production method of dual anti-plastic pipe according to claim 1, is characterized in that the A layer of the described tubing exposure in composite pipe all the time.
3. the production method of dual anti-plastic pipe according to claim 1, is characterized in that, the quality of described resin raw material and conductive black and fire retardant is 90:10:2.
4. the production method of dual anti-plastic pipe according to claim 1, is characterized in that, described conductive filler selects free graphite, carbon black, carbon fiber, CNT, Graphene; Metal dust, metal fragment, metallic fiber; Gold-plated glass fibre, and be coated with one or more the mixture in the group of mica composition of nickel plating, silver, copper, chromium.
5. the production method of dual anti-plastic pipe according to claim 1, is characterized in that, described fire retardant is selected from inorganic combustion inhibitor or organic fire-retardant.
6. according to the production method of dual anti-plastic pipe described in claim 1 or 5, it is characterized in that, described fire retardant is Halogen phosphorus flame retardant.
7. the production method of dual anti-plastic pipe according to claim 1, it is characterized in that, the toughened resin of described B layered material or with A layered material in the resin-phase that uses with, or the resin of the resin using in A layered material after modification, or with A layered material in the resin that uses there is the resin of close melt index.
8. the production method of dual anti-plastic pipe according to claim 1, is characterized in that, the resin in described A, B layer is selected from PVC, PE, PP, CPE.
9. according to the production method of dual anti-plastic pipe described in claim 1 or 8, it is characterized in that, the resin in described A, B layer is PVC or PE.
10. the production method of dual anti-plastic pipe according to claim 1, is characterized in that, in described tubing, total number of plies of A, B layer is 8-70.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410059373.6A CN103817897A (en) | 2014-02-21 | 2014-02-21 | Production method for double resistant plastic pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410059373.6A CN103817897A (en) | 2014-02-21 | 2014-02-21 | Production method for double resistant plastic pipe |
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| Publication Number | Publication Date |
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| CN103817897A true CN103817897A (en) | 2014-05-28 |
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| CN201410059373.6A Pending CN103817897A (en) | 2014-02-21 | 2014-02-21 | Production method for double resistant plastic pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106671386A (en) * | 2016-12-27 | 2017-05-17 | 四川大学 | Conductive polymer tube with controllable axial conductivity and radial conductivity, and preparation method thereof |
| CN107477271A (en) * | 2017-09-29 | 2017-12-15 | 江苏瑞腾涂装科技有限公司 | A kind of high-strength corrosion-resisting plastic-coated composite pipe |
| CN111688148A (en) * | 2020-06-28 | 2020-09-22 | 四川大学 | High-strength high-toughness flame-retardant regenerated plastic and preparation method thereof |
-
2014
- 2014-02-21 CN CN201410059373.6A patent/CN103817897A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106671386A (en) * | 2016-12-27 | 2017-05-17 | 四川大学 | Conductive polymer tube with controllable axial conductivity and radial conductivity, and preparation method thereof |
| CN106671386B (en) * | 2016-12-27 | 2020-10-16 | 四川大学 | Shaft-diameter bidirectional conductivity controllable conductive polymer pipe and preparation method thereof |
| CN107477271A (en) * | 2017-09-29 | 2017-12-15 | 江苏瑞腾涂装科技有限公司 | A kind of high-strength corrosion-resisting plastic-coated composite pipe |
| CN111688148A (en) * | 2020-06-28 | 2020-09-22 | 四川大学 | High-strength high-toughness flame-retardant regenerated plastic and preparation method thereof |
| CN111688148B (en) * | 2020-06-28 | 2023-07-21 | 四川大学 | High-strength high-toughness flame-retardant recycled plastic and preparation method thereof |
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Application publication date: 20140528 |
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