CN102424707A - Method for preparing insulating material for cable - Google Patents
Method for preparing insulating material for cable Download PDFInfo
- Publication number
- CN102424707A CN102424707A CN2011103782647A CN201110378264A CN102424707A CN 102424707 A CN102424707 A CN 102424707A CN 2011103782647 A CN2011103782647 A CN 2011103782647A CN 201110378264 A CN201110378264 A CN 201110378264A CN 102424707 A CN102424707 A CN 102424707A
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- China
- Prior art keywords
- lldpe
- cable
- molecular weight
- insulating material
- preparing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B29C48/03—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
- B29C48/04—Particle-shaped
Abstract
The invention discloses a method for preparing an insulating material for a cable. An average molecular weight with medium degree is selected, polyethylene with symmetrical distribution width of the molecular weight with medium degree and molecular weight distribution is used for high-speed extrusion, and through blending, modifying, adding processing aid and the like, the molecular structural parameter of LLDPE (Linear low Density Polyethylene) can be adjusted, and the rheological property of the LLDPE is improved.
Description
Technical field
The present invention relates to a kind of method for preparing cable with Insulation Material, be specifically related to a kind of resin dedicated preparation method of high speed polyethylene extrusion cable insulating material.
Background technology
Because the resin dedicated localization rate of parts and components of polyethylene cable insulating material is relatively low, industry development needs at present in addition, and raw material relies on import in a large number.Also there are a lot of problems in physics, the mechanical electric performance of the base resin that occurs in the market simultaneously.Be in particular in that melt index is less, molten stream is bigger, and MWD is inhomogeneous, and it is relatively poor just to cause extruding processing characteristics at a high speed thus.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, a kind of method for preparing cable with Insulation Material is provided, it is characterized in that: provide melt index 2.6 ± 0.2 (g/10mins), molten stream than the LLDPEB and the LLDPEA blend that are 30.
Its characteristic is that also above-mentioned blend also comprises the interpolation auxiliary agent, the organic silicon acrylic ester multipolymer.
Its characteristic is that also above-mentioned auxiliary agent is particulate state, and consumption is 1% of LLDPE.
Description of drawings
Fig. 1 process flow diagram
Embodiment
Under identical extrusion condition, homemade LLDPE moment of torsion is big, and head pressure is high, and surface quality is good not as the import material, and the molecular structural parameter of two kinds of DPE of this explanation is different.Processibility for the high speed extruded stock.Can remove consider molecular weight, outside two factors of MWD, the symmetry of considered MWD more.Through test, we think: extrude MWD and symmetric MWD that thin layer insulation Vilaterm material should have intermediate molecular weight and medium-width at a high speed.Blending and modifying improves the processing characteristics of LLDPE in order to adjust the molecular structural parameter of LLDPEA, has selected melt index the LLDPE B and the LI.DPE A blend of big (2.6 scholar 0.2), molten stream smaller (30).Modification LLDPE A extrudes through XSS one 300 type torque rheometers.It extrudes processing characteristics has certain improvement.Add and hold the rheological property that kind of processing aid can improve LLDPE, LLDPE contains regular short-chain branch, and narrow molecular weight distribution, its rheological characteristics demonstrate higher shear viscosity under given shearing rate.Blending and modifying has improved the flowability of LLDPE A; But still exist viscosity big when extruding at a high speed, power consumption of polymer processing is high, problems such as extrudate surface quality difference; The particulate state organosilicon series additive that the modifying plastics that is made through graft polymerization by reactive organopolysiloxane and thermoplastics is used; To the thermoplastics of polyethylene kind, as long as one of adding percentage just can improve the moulding processability of the sliding of moulded products, anti-cry of surprise property, release property and resin itself etc. greatly, along with the increase of processing aid content; Moment of torsion and head pressure value reduce gradually, the extrudate surface quality be improved significantly.When processing rib agent consumption was 1%, the extrusion performance of modification LLDPE A reached ideal LLDPE level.Through overtesting, confirm the prescription and the processing parameter of high speed polyethylene extrusion insulation resin material, and at MDK, the E46-7 CABLE MATERIALS continuous mixing extruding pelletization production line introduced, technical process is as shown in Figure 1.For the screw speed that relates in the expressing technique, moment of torsion, head pressure, fuselage/machine barrel/head temperature is not done at this and to be given unnecessary details all in the reasonable category of routine.
In sum; The LLDPE that adopts the present invention to obtain has excellent physics, mechanical property, electric property; Select the moderate average mark amount of giving for use, moderate MWD width and the symmetric Vilaterm of MWD are used for extruding at a high speed and through blending and modifying, adding the molecular structural parameter of adjustable LLDPE such as processing aid; Improve the rheological property of LLDPE, make homemade LLDPE satisfy the requirement of telecommunication cable high speed polyethylene extrusion Insulation Material.
Claims (3)
1. a method for preparing cable with Insulation Material is characterized in that: provide melt index 2.6 ± 0.2 (g/10mins), molten stream than the LLDPE B and the LLDPEA blend that are 30.
2. a kind of method for preparing cable with Insulation Material according to claim 1 is characterized in that: said blend comprises that also organic Si acrylate copolymer is as adding auxiliary agent.
3. a kind of method for preparing cable with Insulation Material according to claim 2, it is characterized in that: said auxiliary agent is particulate state, and consumption is 1% of LLDPE A and a LLDPE B total amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103782647A CN102424707A (en) | 2011-11-24 | 2011-11-24 | Method for preparing insulating material for cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103782647A CN102424707A (en) | 2011-11-24 | 2011-11-24 | Method for preparing insulating material for cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102424707A true CN102424707A (en) | 2012-04-25 |
Family
ID=45958738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103782647A Pending CN102424707A (en) | 2011-11-24 | 2011-11-24 | Method for preparing insulating material for cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102424707A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464006A (en) * | 2002-06-21 | 2003-12-31 | 中国石化集团齐鲁石油化工公司 | Polyethylene foam insulation composition for telecommunication cable and process for preparing the same |
| CN101265344A (en) * | 2008-05-04 | 2008-09-17 | 江苏东南电缆有限公司 | Flame-proof crosslinked polyethylene and preparation method thereof |
-
2011
- 2011-11-24 CN CN2011103782647A patent/CN102424707A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464006A (en) * | 2002-06-21 | 2003-12-31 | 中国石化集团齐鲁石油化工公司 | Polyethylene foam insulation composition for telecommunication cable and process for preparing the same |
| CN101265344A (en) * | 2008-05-04 | 2008-09-17 | 江苏东南电缆有限公司 | Flame-proof crosslinked polyethylene and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘秉志等: "《改性LLDPE高速挤出绝缘料的研制》", 《塑料工业》, no. 6, 28 November 1995 (1995-11-28), pages 41 - 42 * |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120425 |