CN104882300A - Polypropylene capacitance film production process control method - Google Patents
Polypropylene capacitance film production process control method Download PDFInfo
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- CN104882300A CN104882300A CN201410067651.2A CN201410067651A CN104882300A CN 104882300 A CN104882300 A CN 104882300A CN 201410067651 A CN201410067651 A CN 201410067651A CN 104882300 A CN104882300 A CN 104882300A
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- ratio control
- stretching
- sizing
- preheating
- production process
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Abstract
The invention discloses a polypropylene capacitance film production process control method. The method sequentially comprises the following steps of (1) extrusion plasticizing; (2) filtering; (3) die head fixing; (4) cooling moulding; (5) vertically preheating, stretching and fixing; (6) horizontally preheating, stretching and fixing; (7) thickness measuring, trimming and corona processing; and (8) rolling. In step 1, pressure control is adopted. In steps 2-3, speed ratio control is adopted. In steps 4-6, the speed ratio control is adopted while auxiliary tension force tests are also used. In steps 7-8, speed ratio control is also adopted. By means of the control method characterized by primary speed ratio control and secondary tension force tests, the product thickness uniformity requirements can be satisfied or even exceeded. Product quality is thus guaranteed. Furthermore, frequency conversion AC motors are adopted for speed ratio control. The speed precision is increased. The control method further achieves higher accuracy and reliability.
Description
Technical field
The present invention relates to a kind of production technology of capactive film, be specifically related to a kind of polypropylene capactive film controlling of production process method.
Background technology
Existing polypropylene capactive film production process, comprise extrusion plasticizing → filtration → die head sizing → cooling forming → longitudinal preheating, stretch, sizing → horizontal preheating, stretch, sizing → thickness measuring, trimming and corona treatment → rolling, in above-mentioned each production craft step, sharp cooling roll cooling forming, the preheating of longitudinal stretching machine, stretch, the preheating of sizing and transverse drawing mill, stretch, sizing is all implement to control by applying tension force, because by sheet material own material temperature, the molecular structure of sheet material, ambient temperature effect, tension force display can be different, speed can fluctuate to some extent, finally cause capactive film thickness fluctuation, quality is unstable.
Summary of the invention
For above-mentioned defect, the present invention improves existing polypropylene capactive film controlling of production process method, provides a kind of controlling of production process method improving capactive film quality stability.
The present invention is achieved through the following technical solutions.
A kind of polypropylene capactive film controlling of production process method, comprises the following steps successively.
1. extrusion plasticizing: by pp material by extruder heat fused, and extrude the viscous state melt forming melting.
2. filter: by step 1. in mechanical impurities in obtained viscous state melt and non-fusant elimination.
3. die head sizing: by step 2. in after obtained filtration melt by die head, form sheet melt.
4. cooling forming: sheet melt step 3. obtained, through sharp cooling roll cooling and shaping, forms the sheet containing required crystallization.
5. longitudinal preheating, stretching, sizing: sheet step 4. obtained carries out preheating, stretching, sizing successively by longitudinal stretching machine.
6. horizontal preheating, stretching, sizing: thick film step 5. obtained carries out horizontal preheating, stretching and sizing successively by transverse drawing mill.
7. thickness measuring, trimming and corona treatment: film step 6. obtained carries out thickness measuring, trimming and corona treatment by hauling machine.
8. rolling.
In above-mentioned steps, 1. step adopts Stress control; 3. 2. step adopt Transmission Ratio Control with step; 4. step arrives step and 6. adopts Transmission Ratio Control, is aided with tension test simultaneously; 8. 7. step adopt Transmission Ratio Control with step.
Further improved technical scheme of the present invention is.
Described Transmission Ratio Control adopts alternating-current variable frequency motor.
The viscous state melt of described melting adopts the measuring pump of pure discharge formula to control.
Controlling of production process method of the present invention is unique reliable, by changing sharp cooling roll cooling forming, the tension control method of the processing step of the preheating of the preheating of longitudinal stretching machine, stretching, sizing and transverse drawing mill, stretching, sizing, become Transmission Ratio Control and tension test and synchronously carry out, meet or exceed product thickness uniformity requirement, guarantee product quality.In addition, Transmission Ratio Control adopts frequency-conversion alternating current motor, improves velocity accuracy, and control method more accurately, reliably.
Embodiment
A kind of polypropylene capactive film controlling of production process method, comprises the following steps successively.
1. extrusion plasticizing; 2. filter; 3. die head sizing; 4. cooling forming; 5. longitudinal preheating, stretching, sizing; 6. horizontal preheating, stretching, sizing; 7. thickness measuring, trimming and corona treatment; 8. rolling.
In above-mentioned steps, 1. step adopts Stress control; 3. 2. step adopt Transmission Ratio Control with step; 4. step arrives 6. step and adopts Transmission Ratio Control, be aided with tension test simultaneously, tension test makes reference for during access speed ratio, improve the accuracy that velocity rate is chosen, but tension force no longer participates in control rate, avoid causing speed ratio to fluctuate because of sheet material molecular structure, sheet temperature and variation of ambient temperature; 8. 7. step adopt Transmission Ratio Control with step.
Described Transmission Ratio Control adopts alternating-current variable frequency motor, adopts frequency conversion control technique, improves the accuracy of velocity rate, thus strict control capacitance film thickness, guarantee the stability of product quality.
The viscous state melt of described melting adopts the measuring pump of pure discharge formula to control, and ensures the stability of extrusion capacity.
Claims (3)
1. a polypropylene capactive film controlling of production process method, comprises the following steps: successively
1) extrusion plasticizing: by pp material by extruder heat fused, and extrude the viscous state melt forming melting;
2) filter: by the mechanical impurities in the viscous state melt that obtains in step 1) and non-fusant elimination;
3) die head sizing: by step 2) in after obtained filtration melt by die head, form sheet melt;
4) cooling forming: by sheet melt obtained for step 3) through sharp cooling roll cooling and shaping, form the sheet containing required crystallization;
5) longitudinal preheating, stretching, sizing: the sheet that step 4) is obtained carries out preheating, stretching, sizing successively by longitudinal stretching machine;
6) horizontal preheating, stretching, sizing: the thick film that step 5) is obtained carries out horizontal preheating, stretching and sizing successively by transverse drawing mill;
7) thickness measuring, trimming and corona treatment: the film that step 6) is obtained carries out thickness measuring, trimming and corona treatment by hauling machine;
8) rolling;
It is characterized in that: described step 1) adopts Stress control; Step 2) and step 3) employing Transmission Ratio Control; Step 4) adopts Transmission Ratio Control to step 6), is aided with tension test simultaneously; Step 7) and step 8) adopt Transmission Ratio Control.
2. polypropylene capactive film controlling of production process method according to claim 1, is characterized in that: Transmission Ratio Control adopts alternating-current variable frequency motor.
3. polypropylene capactive film controlling of production process method according to claim 1, is characterized in that: the viscous state melt of melting adopts the measuring pump of pure discharge formula to control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410067651.2A CN104882300A (en) | 2014-02-27 | 2014-02-27 | Polypropylene capacitance film production process control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410067651.2A CN104882300A (en) | 2014-02-27 | 2014-02-27 | Polypropylene capacitance film production process control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104882300A true CN104882300A (en) | 2015-09-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410067651.2A Pending CN104882300A (en) | 2014-02-27 | 2014-02-27 | Polypropylene capacitance film production process control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104882300A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201669891U (en) * | 2010-05-20 | 2010-12-15 | 苏州东福来机电科技有限公司 | Silica gel calendering compound machine |
| CN102509610A (en) * | 2011-12-28 | 2012-06-20 | 宁波绿海电子材料有限公司 | Preparation method for 2.5 mu m polypropylene capacitor thin film |
| CN102751091A (en) * | 2012-07-06 | 2012-10-24 | 江苏中立方实业有限公司 | High-temperature resistant ultrathin polypropylene metalized capacitor film for capacitor |
| CN103112169A (en) * | 2013-01-28 | 2013-05-22 | 宁波绿海电子材料有限公司 | Preparation method of metalized film of induction cooker capacitor |
-
2014
- 2014-02-27 CN CN201410067651.2A patent/CN104882300A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201669891U (en) * | 2010-05-20 | 2010-12-15 | 苏州东福来机电科技有限公司 | Silica gel calendering compound machine |
| CN102509610A (en) * | 2011-12-28 | 2012-06-20 | 宁波绿海电子材料有限公司 | Preparation method for 2.5 mu m polypropylene capacitor thin film |
| CN102751091A (en) * | 2012-07-06 | 2012-10-24 | 江苏中立方实业有限公司 | High-temperature resistant ultrathin polypropylene metalized capacitor film for capacitor |
| CN103112169A (en) * | 2013-01-28 | 2013-05-22 | 宁波绿海电子材料有限公司 | Preparation method of metalized film of induction cooker capacitor |
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Application publication date: 20150902 |