CN1876708A - Super high flowed polypropylene material for smelt-spraying nonwoven fabric - Google Patents
Super high flowed polypropylene material for smelt-spraying nonwoven fabric Download PDFInfo
- Publication number
- CN1876708A CN1876708A CNA2005100437226A CN200510043722A CN1876708A CN 1876708 A CN1876708 A CN 1876708A CN A2005100437226 A CNA2005100437226 A CN A2005100437226A CN 200510043722 A CN200510043722 A CN 200510043722A CN 1876708 A CN1876708 A CN 1876708A
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- CN
- China
- Prior art keywords
- molecular weight
- polypropylene
- screw extruder
- speed
- super high
- 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.)
- Pending
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Classifications
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates the material used for super high flowing polypropylene nonwoven. The method comprises the following steps: 1 putting the polypropylene, lubricating agent, light-stability agent, anti-oxidant into high-speed mixing machine; 2 transferring the raw material into twin-screw extruder by screw feed; 3 putting the molecular weight conditioning agent into twin-screw extruder, making it react with alloying system; 4 drying, cooling, chipping with dicing machine; 5 homogenising, and getting product. The invention has the advantages of high productivity, and narrow molecular weight distribution.
Description
The technical field is as follows: the invention belongs to the technical field of processing of special polypropylene melt-blown non-woven fabrics, and particularly relates to a special ultrahigh-flow material for polypropylene melt-blown non-woven fabrics.
Background art: at present, the domestic method for preparing the polypropylene special material with the ultrahigh melt flow rate is to adopt a method for adjusting the hydrogenation amount in the polymerization process of the propylene monomer, namely a hydrogenation method. The molecular weight of the polymer can only be controlled within a certain range by adopting a hydrogenation method to adjust the melt flow rate, and the molecular weight distribution of the product is too wide, so that the product has great influence on the performance of the product and is not suitable for the production of melt-blown non-woven fabrics.
The invention content is as follows: the invention aims to provide a special polypropylene material with ultrahigh melt flow rate, which can control molecular weight and molecular weight distribution, has stable product performance, can meet the requirement of producing melt-blown non-woven fabrics and is produced by adopting a molecular weight regulator method.
The technical scheme of theinvention is as follows: a polypropylene special material with ultrahigh melt flow rate is characterized by being processed and prepared according to the following procedures that A, accurately metered polypropylene, a lubricant, a light stabilizer and an antioxidant are sequentially added into a high-speed mixer for low-speed and high-speed premixing; B. conveying the uniformly mixed raw materials to a co-rotating double-screw extruder by a feeding screw; C. the molecular weight regulator is respectively pumped into the double-screw extruder from a specific section by a metering pump to perform chemical reaction with the melt blending system; D. cooling and drying the extruded material strips by air cooling drying equipment, and granulating by a granulator; E. and D, homogenizing the granules prepared in the step D through a homogenizing bin to prepare a finished product.
The invention has the following effects: because the molecular weight regulator method is adopted in the technical scheme, the basic principle is as follows: the molecular weight regulator is decomposed under the action of heat initiation to generate free radicals, and the process comprises the following steps:
the free radicals generated by the molecular weight regulator preferentially attack the structure of the polypropylene molecule, resulting in chain scission at carbon atom β.
The polypropylene macromolecular chains are subjected to a fracture reaction to form polypropylene macromolecular chains with lower molecular weight, so that the fluidity of the polymer is increased, and the molecular weight regulator is respectively injected into the double-screw extruder from a specific section through the metering pump, so that the molecular weight distribution is controlled, and the mechanical property of the material is ensured. The technical indexes of the detected product are that the melt flow rate is as follows: 1200. + -. 80g/10min, molecular weight distribution: not more than 4Mw/Mn, ash content: less than or equal to 200ppm, and the content of volatile components: less than or equal to 0.03 percent (wt), and reaches the performance index of 3645G products produced by EXXON company in the United states. Therefore, the method has the obvious advantages of high production efficiency, narrow molecular weight distribution of products and suitability for the production of melt-blown non-woven fabrics.
Description of the drawings: the technical solution of the present invention is further explained with reference to the accompanying drawings and the specific embodiments. The attached drawing is a process flow chart of the invention.
The specific implementation mode is as follows: referring to the attached drawing, the special polypropylene material with ultrahigh melt flow rate is prepared by the following steps of A, 100kg of accurately metered polypropylene, 0.3kg of lubricant, 0.4kg of light stabilizer and 0.4kg of antioxidant are sequentially added into a high-speed mixer for low-speed and high-speed premixing for 3 minutes; B. conveying the uniformly mixed raw materials to a co-rotating double-screw extruder by a feeding screw; C. taking 400ml of molecular weight regulator, respectively pumping the molecular weight regulator into the double-screw extruder from liquid injection holes on the second section and the third section of the double-screw extruder by a metering pump, and carrying out chemical reaction with the melt blending system; D. extruding material strips, cooling and drying by air cooling drying equipment, and granulating by a granulator; E. and D, homogenizing the granules prepared in the step D through a homogenizing bin to prepare a finished product.
Claims (1)
1. A polypropylene special material with ultrahigh melt flow rate is characterized by being processed and prepared according to the following procedures that A, accurately metered polypropylene, a lubricant, a light stabilizer and an antioxidant are sequentially added into a high-speed mixer for low-speed and high-speed premixing; B. conveying the uniformly mixed raw materials to a co-rotating double-screw extruder by a feeding screw; C. the molecular weight regulator is respectively pumped into the double-screw extruder from a specific section by a metering pump to perform chemical reaction with the melt blending system; D. cooling and drying the extruded material strips by air cooling drying equipment, and granulating by a granulator; E. and D, homogenizing the granules prepared in the step D through a homogenizing bin to prepare a finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100437226A CN1876708A (en) | 2005-06-09 | 2005-06-09 | Super high flowed polypropylene material for smelt-spraying nonwoven fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100437226A CN1876708A (en) | 2005-06-09 | 2005-06-09 | Super high flowed polypropylene material for smelt-spraying nonwoven fabric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1876708A true CN1876708A (en) | 2006-12-13 |
Family
ID=37509281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100437226A Pending CN1876708A (en) | 2005-06-09 | 2005-06-09 | Super high flowed polypropylene material for smelt-spraying nonwoven fabric |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1876708A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102675731A (en) * | 2011-03-10 | 2012-09-19 | 北京伊士通新材料发展有限公司 | Thermal ageing-resistant polypropylene mixture, preparation method and application thereof |
| CN111206295A (en) * | 2020-02-03 | 2020-05-29 | 深圳市沃尔核材股份有限公司 | Special material for sterilization mask, sterilization net, sterilization mask and preparation method of sterilization mask |
| CN111304829A (en) * | 2020-04-28 | 2020-06-19 | 辽宁东铄新材料科技有限公司 | Preparation method of odorless melt-blown fabric |
| CN111645220A (en) * | 2020-05-20 | 2020-09-11 | 湖南盛锦新材料有限公司 | High-quality high-yield melt-blown material production equipment and process |
-
2005
- 2005-06-09 CN CNA2005100437226A patent/CN1876708A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102675731A (en) * | 2011-03-10 | 2012-09-19 | 北京伊士通新材料发展有限公司 | Thermal ageing-resistant polypropylene mixture, preparation method and application thereof |
| CN111206295A (en) * | 2020-02-03 | 2020-05-29 | 深圳市沃尔核材股份有限公司 | Special material for sterilization mask, sterilization net, sterilization mask and preparation method of sterilization mask |
| CN111304829A (en) * | 2020-04-28 | 2020-06-19 | 辽宁东铄新材料科技有限公司 | Preparation method of odorless melt-blown fabric |
| CN111645220A (en) * | 2020-05-20 | 2020-09-11 | 湖南盛锦新材料有限公司 | High-quality high-yield melt-blown material production equipment and process |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |