CN112680803A - Method for preparing 0.1-5 micron polypropylene fiber by centrifugal blowing - Google Patents
Method for preparing 0.1-5 micron polypropylene fiber by centrifugal blowing Download PDFInfo
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- CN112680803A CN112680803A CN202011532114.2A CN202011532114A CN112680803A CN 112680803 A CN112680803 A CN 112680803A CN 202011532114 A CN202011532114 A CN 202011532114A CN 112680803 A CN112680803 A CN 112680803A
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Abstract
The invention discloses a method for preparing 0.1-5 micron polypropylene fiber by centrifugal blowing, which adopts centrifugal blowing equipment, wherein polypropylene melt is centrifuged into filaments through a high-speed centrifugal die head, and then the filaments are blown off to a filament plate by high-speed directional airflow to prepare the 0.1-5 micron polypropylene fiber. The invention adopts centrifugal blowing equipment to centrifuge polypropylene melt into filaments through a high-speed centrifugal die head, and then the filaments are blown off to a filament plate by high-speed directional airflow to prepare 0.1-5 micron polypropylene fibers, particularly 0.1-1 micron polypropylene fibers can be prepared, and the method has the characteristics of good tensile strength, economy, low energy consumption, high yield and uniform filament diameter.
Description
Technical Field
The invention belongs to the technical field of polypropylene spinning preparation production, and particularly relates to a method for preparing 0.1-5 micron polypropylene fibers by centrifuging a polypropylene melt into filaments through a high-speed centrifugal die head by adopting centrifugal blowing equipment and blowing off the filaments to a filament plate by high-speed directional airflow.
Background
The polypropylene fiber is generally applicable to the fields of textile, medical treatment and health, thermal insulation materials, filtering materials and the like. Ordinary polypropylene fibers are formed into filaments by a melt-blowing method, a spunlace method and the like, the filament diameter is thick (5-20 micrometers), micro-nano scale preparation is difficult to realize, strength of the monofilaments is affected, and application of the polypropylene fibers is affected. At present, the mass production process of polypropylene fiber mainly comprises melt spinning and melt blowing, wherein the diameter of the melt spinning polypropylene fiber is usually between 10 and 20 mu m or even thicker. The electrostatic spinning method (melt spinning) needs high-temperature solution electrospinning or high-temperature melt electrospinning, and has high requirements on devices.
Therefore, the invention prepares 0.1-5 micron polypropylene fiber by centrifugal blowing, utilizes the polypropylene to flow to the high-speed rotating die head, accelerates centrifugal filament formation by virtue of high centrifugal force, realizes the filament diameter of 0.1-5 micron and more uniform filament diameter, and utilizes high-speed directional airflow to rapidly blow the polypropylene to the filament plate for filament deposition, thereby solving the practical problem for the application of the polypropylene in medical materials and micro-nano scale composite materials. The high-speed centrifugal die head is adopted, so that the problem that the polypropylene fiber is uniformly filamentized at the micron level of 0.1-5 is solved; the high-speed directional air flow blowing is adopted to solve the problems of gathering and blowing the filament plate after the centrifugation of the polypropylene fiber.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a method for preparing 0.1-5 micron polypropylene fibers by centrifuging a polypropylene melt into filaments through a high-speed centrifugal die head by adopting centrifugal blowing equipment and blowing off the filaments to a filament-sticking plate by high-speed directional airflow, and the method has the characteristics of economy, low energy consumption, high yield and uniform filament diameter.
The technical scheme of the invention is as follows:
a centrifugal blowing process for preparing 0.1-5 microns polypropylene fibres includes such steps as centrifugal blowing to make polypropylene melt become filaments, and blowing the filaments to filament plate by high-speed directional airflow to obtain 0.1-5 microns polypropylene fibres.
A method for preparing 0.1-5 micron polypropylene fiber by centrifugal blowing comprises the following steps:
step 1: drying and feeding polypropylene into an extruder, wherein the extrusion temperature is 200 ℃ and 280 ℃, and forming a polypropylene melt;
step 2: placing the polypropylene melt in a centrifugal die head of a centrifugal machine to be centrifuged into 0.1-5 micron polypropylene fiber.
Preferably, the method further comprises the step 3: the polypropylene fibers are blown off by a high velocity directional gas stream to a die plate for collection.
Preferably, in the step 2, the diameter of a centrifugal die head of the centrifuge is 5-50cm, and the rotating speed is 2000-.
Or preferably, in the step 3, the polypropylene fibers are blown off to a filament plate by a high-speed centrifugal fan and collected.
More preferably, the outlet wind speed of the high-speed centrifugal fan is 5-50 m/s.
The invention has the technical effects that:
the invention adopts centrifugal blowing equipment to centrifuge polypropylene melt into filaments through a high-speed centrifugal die head, and then the filaments are blown off to a filament plate by high-speed directional airflow to prepare 0.1-5 micron polypropylene fibers, particularly 0.1-1 micron polypropylene fibers can be prepared, and the method has the characteristics of good tensile strength, economy, low energy consumption, high yield and uniform filament diameter.
Drawings
FIG. 1 scanning electron micrograph of polypropylene fiber prepared in example 1;
FIG. 2 scanning electron micrographs of polypropylene fibers prepared in example 2;
FIG. 3 scanning electron micrographs of polypropylene fibers prepared in example 3;
FIG. 4 scanning electron micrographs of polypropylene fibers prepared in example 4.
Detailed Description
The production process of the present invention will be described in further detail with reference to examples.
Example 1
A method for preparing polypropylene fibers by centrifugal blowing comprises the following steps:
step 1: drying and feeding polypropylene into an extruder, wherein the extrusion temperature is 200 ℃ to form a polypropylene melt;
step 2: and (3) placing the polypropylene melt in a centrifugal die head of a centrifugal machine for centrifuging into 2-3 micron polypropylene fibers.
And step 3: the polypropylene fibers are blown off by a high velocity directional gas stream to a die plate for collection.
Wherein the diameter of a centrifugal die head of the centrifugal machine is 10cm, and the rotating speed is 10000 r/min; blowing off the polypropylene fibers to a filament plate through a high-speed centrifugal fan and collecting the polypropylene fibers, wherein the outlet air speed of the high-speed centrifugal fan is 20 m/s;
the tensile strength of the prepared polypropylene fiber is 38.9MPa, and a scanning electron microscope picture is shown in figure 1.
Example 2
A method for preparing polypropylene fibers by centrifugal blowing comprises the following steps:
step 1: drying and feeding polypropylene into an extruder, wherein the extrusion temperature is 260 ℃, and forming a polypropylene melt;
step 2: and (3) placing the polypropylene melt in a centrifugal die head of a centrifugal machine to be centrifuged into polypropylene fibers with the diameter of 1-2 microns.
And step 3: the polypropylene fibers are blown off by a high velocity directional gas stream to a die plate for collection.
Wherein the diameter of a centrifugal die head of the centrifugal machine is 20cm, and the rotating speed is 30000 r/min; blowing off the polypropylene fibers to a filament plate through a high-speed centrifugal fan and collecting the polypropylene fibers, wherein the outlet air speed of the high-speed centrifugal fan is 40 m/s;
the tensile strength of the prepared polypropylene fiber is 30.6MPa, and a scanning electron micrograph is shown in figure 2.
Example 3
A method for preparing polypropylene fibers by centrifugal blowing comprises the following steps:
step 1: drying and feeding polypropylene into an extruder, wherein the extrusion temperature is 280 ℃, and forming a polypropylene melt;
step 2: placing the polypropylene melt in a centrifugal die head of a centrifugal machine to be centrifuged into polypropylene fibers with the diameter of 0.1-1 micron.
And step 3: the polypropylene fibers are blown off by a high velocity directional gas stream to a die plate for collection.
Wherein the diameter of a centrifugal die head of the centrifugal machine is 50m, and the rotating speed is 80000 r/min; blowing off the polypropylene fibers to a filament plate through a high-speed centrifugal fan and collecting the polypropylene fibers, wherein the outlet air speed of the high-speed centrifugal fan is 50 m/s;
the tensile strength of the prepared polypropylene fiber is 27.1MPa, and a scanning electron microscope picture is shown in figure 3.
Example 4
A method for preparing polypropylene fibers by centrifugal blowing comprises the following steps:
step 1: drying and feeding polypropylene into an extruder, wherein the extrusion temperature is 240 ℃, and forming a polypropylene melt;
step 2: and (3) placing the polypropylene melt in a centrifugal die head of a centrifugal machine for centrifuging to obtain 3-5 micron polypropylene fibers.
And step 3: the polypropylene fibers are blown off by a high velocity directional gas stream to a die plate for collection.
Wherein the diameter of a centrifugal die head of the centrifugal machine is 5m, and the rotating speed is 2000 r/min; blowing off the polypropylene fibers to a filament plate through a high-speed centrifugal fan and collecting the polypropylene fibers, wherein the outlet air speed of the high-speed centrifugal fan is 50 m/s;
the tensile strength of the prepared polypropylene fiber is 36.7MPa, and a scanning electron microscope picture is shown in figure 4.
Claims (6)
1. A method for preparing 0.1-5 micron polypropylene fiber by centrifugal blowing is characterized in that: the polypropylene melt is centrifugally formed into filaments by a high-speed centrifugal die head by adopting centrifugal blowing equipment, and then blown off to a filament plate by high-speed directional airflow to prepare the 0.1-5 micron polypropylene fiber.
2. The method for preparing 0.1-5 micron polypropylene fiber by centrifugal blowing according to claim 1, wherein: the method comprises the following steps:
step 1: drying and feeding polypropylene into an extruder, wherein the extrusion temperature is 200 ℃ and 280 ℃, and forming a polypropylene melt;
step 2: placing the polypropylene melt in a centrifugal die head of a centrifugal machine to be centrifuged into 0.1-5 micron polypropylene fiber.
3. The method for preparing 0.1-5 micron polypropylene fiber by centrifugal blowing according to claim 2, wherein: further comprising the step 3: the polypropylene fibers are blown off by a high velocity directional gas stream to a die plate for collection.
4. The method for preparing 0.1-5 micron polypropylene fiber by centrifugal blowing according to claim 3, wherein: in the step 2, the diameter of a centrifugal die head of the centrifuge is 5-50cm, and the rotating speed is 2000-.
5. The method for preparing polypropylene fiber with 0.1-5 micron by centrifugal blowing according to claim 4, wherein: in the step 3, the polypropylene fiber is blown off to a filament plate by a high-speed centrifugal fan and collected.
6. The method for preparing 0.1-5 micron polypropylene fiber by centrifugal blowing according to claim 5, wherein: the outlet wind speed of the high-speed centrifugal fan is 5-50 m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011532114.2A CN112680803A (en) | 2020-12-22 | 2020-12-22 | Method for preparing 0.1-5 micron polypropylene fiber by centrifugal blowing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011532114.2A CN112680803A (en) | 2020-12-22 | 2020-12-22 | Method for preparing 0.1-5 micron polypropylene fiber by centrifugal blowing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11958308B1 (en) | 2023-05-31 | 2024-04-16 | G13 Innovation In Production Ltd | Thermal paper, and methods and systems for forming the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900206A (en) * | 1997-11-24 | 1999-05-04 | Owens Corning Fiberglas Technology, Inc. | Method of making a fibrous pack |
| CN104294383A (en) * | 2014-10-31 | 2015-01-21 | 苏州大学 | Airflow rotary table spinning device used for preparing nanofiber |
| CN104674360A (en) * | 2015-03-05 | 2015-06-03 | 北京化工大学 | Device and method for differential centrifugal spinning by using air flow to assist melt |
| CN105648545A (en) * | 2016-04-12 | 2016-06-08 | 烟台森森环保科技有限公司 | Centrifugal spiral spinning device |
-
2020
- 2020-12-22 CN CN202011532114.2A patent/CN112680803A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900206A (en) * | 1997-11-24 | 1999-05-04 | Owens Corning Fiberglas Technology, Inc. | Method of making a fibrous pack |
| CN104294383A (en) * | 2014-10-31 | 2015-01-21 | 苏州大学 | Airflow rotary table spinning device used for preparing nanofiber |
| CN104674360A (en) * | 2015-03-05 | 2015-06-03 | 北京化工大学 | Device and method for differential centrifugal spinning by using air flow to assist melt |
| CN105648545A (en) * | 2016-04-12 | 2016-06-08 | 烟台森森环保科技有限公司 | Centrifugal spiral spinning device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11958308B1 (en) | 2023-05-31 | 2024-04-16 | G13 Innovation In Production Ltd | Thermal paper, and methods and systems for forming the same |
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Application publication date: 20210420 |