CN104552866A - Process for producing low-odor modified plastic by employing azeotropic method - Google Patents
Process for producing low-odor modified plastic by employing azeotropic method Download PDFInfo
- Publication number
- CN104552866A CN104552866A CN201510047016.2A CN201510047016A CN104552866A CN 104552866 A CN104552866 A CN 104552866A CN 201510047016 A CN201510047016 A CN 201510047016A CN 104552866 A CN104552866 A CN 104552866A
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- section
- compound
- screw extruder
- cylindrical shell
- mixture
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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
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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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
- B29C48/395—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
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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
- B29C48/50—Details of extruders
- B29C48/505—Screws
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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
- B29C48/50—Details of extruders
- B29C48/68—Barrels or cylinders
- B29C48/682—Barrels or cylinders for twin screws
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a process for producing low-odor modified plastic by employing an azeotropic method. The process comprises the following steps: primarily mixing raw materials in a high-speed stirrer to form a mixture; adding the mixture to a machine barrel of a co-rotating screw extruder from the position of a first section of barrel through a weight-loss feeding device of the screw extruder, fusing and extruding; when the fused mixture reaches a fifth section of barrel, adding purified water being over 70 DEG C at a fifth section of barrel through a metering pump, and forming an azeotrope together with the mixture, wherein the adding amount is 5%-10% of total mass of the mixture and the purified water; when water vapor of the mixture and the azeotrope reaches a ninth section and an eleventh section of barrels of the screw extruder, respectively carrying out vacuum supply treatment to discharge the odor and the water vapor in plastic; and plodding through a machine head template, cooling by a water channel and an air knife, dicing and packing. The process has the advantages of good odor removal effect and high production efficiency; and time and labor are saved.
Description
Technical field
The invention belongs to the technology field of producing modified plastics, be specifically related to the technique that a kind of azeotropic method produces low smell modified plastics.
Background technology
Along with improving constantly of people's living standard, the environmental protection consciousness of people is more and more stronger, containing a lot of volatile substances in plastics, is unfavorable for environment and health, and the modified plastics producing low smell becomes the new developing goal in industry.At present, mainly two-step method is adopted in the low smell modified plastics technique of production, common process extruded modified plastics before this, then material is dried for a long time in employing hot air dries method, this method not only wastes time and energy, production efficiency is low, and taste removal weak effect, still containing more volatile substances in the plastics of output.
Summary of the invention
It is a kind of time saving and energy saving to the object of this invention is to provide, and taste removal is effective, and the azeotropic method that production efficiency is high produces the technique of low smell modified plastics.
Technical scheme of the present invention is: a kind of azeotropic method produces the technique of low smell modified plastics, comprise the following steps: raw material are tentatively mixed to form compound in homogenizer, compound is joined in the machine barrel of screw extruder in the same way by the weight-loss type drawing-in device of screw extruder from first segment cylindrical shell position, then melting is carried out, extrude, when the compound after melting arrives Section of five cylindrical shell place, add by measuring pump the pure water that temperature is more than 70 degree at Section of five cylindrical shell place, azeotropic is formed with compound, addition is the 5-10% of the gross mass of compound and pure water, when saving cylindrical shell place for Section nine and the 11 that the water vapour of compound and azeotropic arrives screw extruder, carry out respectively vacuumizing process, peculiar smell in plastics and steam are discharged, then through die template shaping, tank, after air knife cooling, pelletizing is packed, wherein, the negative pressure value reached during application of vacuum is 0.06-0.08MPA.
Further, described screw extruder is the parallel dual-screw extruding machine of 12 joint cylindrical shells, and its draw ratio is 48:1, and screw diameter is 72mm.
Further, the addition of described pure water is the 6-7% of the gross mass of compound and pure water.
Further, the negative pressure at Section nine and the 11 joint place is 0.07MPA.
The invention has the beneficial effects as follows, owing to have employed technique scheme, in Section 5 cylindrical shell, modified plastics reaches molten condition, and pure water adds in the rear short time and reaches boiling; Then with the modified plastics of melting in cylindrical shell through the blended effect of screw rod, when arriving Section 9 cylindrical shell, the part peculiar smell in modified plastics and steam are discharged by negative pressure; And then through the further blended effect of Section 10 cylindrical shell and screw rod, again the part peculiar smell in modified plastics and steam are discharged in Section 11 cylindrical shell negative pressure, thus obtain the very low modified plastics of smell, thus this technique have time saving and energy saving, taste removal is effective, the advantage that production efficiency is high.
The modified plastics smell produced after process modification of the present invention is low, pollute little, excellent performance, is worth promoting.
detailed description of the invention:
Technical scheme of the present invention is further illustrated below in conjunction with specific embodiment.
Embodiment 1:
A kind of azeotropic method produces the technique of low smell modified plastics, comprise the following steps: raw material are tentatively mixed to form compound in homogenizer, compound is joined in the machine barrel of parallel dual-screw extruding machine by the weight-loss type drawing-in device of double screw extruder from first segment cylindrical shell position, then melting is carried out, extrude, when the compound after melting arrives Section of five cylindrical shell place, add by measuring pump the pure water that temperature is more than 70 degree at Section of five cylindrical shell place, azeotropic is formed with compound, addition is 5% of the gross mass of compound and pure water, when saving cylindrical shell place for Section nine and the 11 that the water vapour of compound and azeotropic arrives double screw extruder, carry out respectively vacuumizing process, peculiar smell in plastics and steam are discharged, then through die template shaping, tank, after air knife cooling, pelletizing is packed, wherein, the negative pressure value reached during application of vacuum is 0.06MPA.
Described double screw extruder is preferably the parallel dual-screw extruding machine of 12 joint cylindrical shells, and its draw ratio is 48:1, and screw diameter is 72mm.
Be provided with heater outside double screw extruder machine barrel, heating-up temperature is more than 200 degree, and the compound of raw material enters double screw extruder, and to arrive Section of five cylindrical shell be reached molten condition, and pure water adds in the rear short time and reaches boiling; Then with the compound of melting in cylindrical shell through the blended effect of screw rod, when arriving Section 9 cylindrical shell, the part peculiar smell in compound and steam are discharged by negative pressure; And then through the further blended effect of Section 10 cylindrical shell and screw rod, again part peculiar smell wherein and steam are discharged in Section 11 cylindrical shell negative pressure, thus obtain the very low modified plastics of smell.
Embodiment 2:
A kind of azeotropic method produces the technique of low smell modified plastics, comprise the following steps: raw material are tentatively mixed to form compound in homogenizer, compound is joined in the machine barrel of parallel dual-screw extruding machine by the weight-loss type drawing-in device of double screw extruder from first segment cylindrical shell position, then melting is carried out, extrude, when the compound after melting arrives Section of five cylindrical shell place, add by measuring pump the pure water that temperature is more than 70 degree at Section of five cylindrical shell place, azeotropic is formed with compound, addition is 6.6% of the gross mass of compound and pure water, when saving cylindrical shell place for Section nine and the 11 that the water vapour of compound and azeotropic arrives double screw extruder, carry out respectively vacuumizing process, peculiar smell in plastics and steam are discharged, then through die template shaping, tank, after air knife cooling, pelletizing is packed, wherein, the negative pressure value reached during application of vacuum is 0.07MPA.
Described screw extruder is the parallel dual-screw extruding machine of 12 joint cylindrical shells, and its draw ratio is 48:1, and screw diameter is 72mm.
Embodiment 3: a kind of azeotropic method produces the technique of low smell modified plastics, comprise the following steps: raw material are tentatively mixed to form compound in homogenizer, compound is joined in the machine barrel of parallel dual-screw extruding machine by the weight-loss type drawing-in device of double screw extruder from first segment cylindrical shell position, then melting is carried out, extrude, when the compound after melting arrives Section of five cylindrical shell place, add by measuring pump the pure water that temperature is more than 70 degree at Section of five cylindrical shell place, azeotropic is formed with compound, addition is 10% of the gross mass of compound and pure water, when saving cylindrical shell place for Section nine and the 11 that the water vapour of compound and azeotropic arrives double screw extruder, carry out respectively vacuumizing process, peculiar smell in plastics and steam are discharged, then through die template shaping, tank, after air knife cooling, pelletizing is packed, wherein, the negative pressure value reached during application of vacuum is 0.08MPA.
Described screw extruder is the parallel dual-screw extruding machine of 12 joint cylindrical shells, and its draw ratio is 48:1, and screw diameter is 72mm.
The result of the total carbon content of the test of the modified plastics that above 3 groups of embodiments are produced is respectively: 16.3 μ gC/g, 18.1 μ gC/g, 19.0 μ gC/g.By contrast, the modified plastics of the production of present invention process can reach automotive upholstery odor requirements completely; The modified plastics of this explained hereafter does not need secondary to dry material simultaneously, and solving existing low smell modified plastics wastes time and energy, the problem that production efficiency is low.
The present invention relates to the technique that a kind of azeotropic method produces low smell modified plastics, raw material are the steps include: tentatively to be mixed to form compound in homogenizer, compound is joined in the machine barrel of screw extruder in the same way by the weight-loss type drawing-in device of screw extruder from first segment cylindrical shell position, then melting is carried out, extrude, when the compound after melting arrives Section of five cylindrical shell place, add by measuring pump the pure water that temperature is more than 70 degree at Section of five cylindrical shell place, azeotropic is formed with compound, addition is the 5-10% of the gross mass of compound and pure water, when saving cylindrical shell place for Section nine and the 11 that the water vapour of compound and azeotropic arrives screw extruder, carry out respectively vacuumizing process, peculiar smell in plastics and steam are discharged, then through die template shaping, tank, after air knife cooling, pelletizing is packed.It is time saving and energy saving that this technique has, and taste removal is effective, the advantage that production efficiency is high.
Claims (4)
1. an azeotropic method produces the technique of low smell modified plastics, it is characterized in that, comprise the following steps: raw material are tentatively mixed to form compound in homogenizer, compound is joined in the machine barrel of screw extruder in the same way by the weight-loss type drawing-in device of screw extruder from first segment cylindrical shell position, then melting is carried out, extrude, when the compound after melting arrives Section of five cylindrical shell place, add by measuring pump the pure water that temperature is more than 70 degree at Section of five cylindrical shell place, azeotropic is formed with compound, addition is the 5-10% of the gross mass of compound and pure water, when saving cylindrical shell place for Section nine and the 11 that the water vapour of compound and azeotropic arrives screw extruder, carry out respectively vacuumizing process, peculiar smell in plastics and steam are discharged, then through die template shaping, tank, after air knife cooling, pelletizing is packed, wherein, the negative pressure value reached during application of vacuum is 0.06-0.08MPA.
2. azeotropic method according to claim 1 produces the technique of low smell modified plastics, it is characterized in that, comprises the following steps: described screw extruder is double screw extruder, totally ten two joint cylindrical shells, and its draw ratio is 48:1, and screw diameter is 72mm.
3. azeotropic method according to claim 1 produces the technique of low smell modified plastics, it is characterized in that, the addition of described pure water is the 6-7% of the gross mass of compound and pure water.
4. azeotropic method according to claim 1 produces the technique of low smell modified plastics, it is characterized in that, the negative pressure at Section nine and the 11 joint place is 0.07MPA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047016.2A CN104552866A (en) | 2015-01-30 | 2015-01-30 | Process for producing low-odor modified plastic by employing azeotropic method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510047016.2A CN104552866A (en) | 2015-01-30 | 2015-01-30 | Process for producing low-odor modified plastic by employing azeotropic method |
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| Publication Number | Publication Date |
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| CN104552866A true CN104552866A (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510047016.2A Pending CN104552866A (en) | 2015-01-30 | 2015-01-30 | Process for producing low-odor modified plastic by employing azeotropic method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359174A (en) * | 2018-02-06 | 2018-08-03 | 金旸（厦门）新材料科技有限公司 | Low bromine anti-flaming polypropylene composite of a kind of low smell and preparation method thereof |
| CN111531839A (en) * | 2020-05-26 | 2020-08-14 | 金发科技股份有限公司 | Method and device for assisting polymer extrusion blending by liquid additive and application |
| WO2020245476A1 (en) | 2019-06-04 | 2020-12-10 | Universidad De Alicante | Method and system for the elimination of odours in recycled plastics |
-
2015
- 2015-01-30 CN CN201510047016.2A patent/CN104552866A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108359174A (en) * | 2018-02-06 | 2018-08-03 | 金旸（厦门）新材料科技有限公司 | Low bromine anti-flaming polypropylene composite of a kind of low smell and preparation method thereof |
| WO2020245476A1 (en) | 2019-06-04 | 2020-12-10 | Universidad De Alicante | Method and system for the elimination of odours in recycled plastics |
| CN111531839A (en) * | 2020-05-26 | 2020-08-14 | 金发科技股份有限公司 | Method and device for assisting polymer extrusion blending by liquid additive and application |
| WO2021237655A1 (en) * | 2020-05-26 | 2021-12-02 | 金发科技股份有限公司 | Liquid additive assisted polymer extrusion and blending method and device and use thereof |
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Application publication date: 20150429 |
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| RJ01 | Rejection of invention patent application after publication |