CN103144233A - Extruding, casting molding defoamer of polyamide acid amine resin - Google Patents
Extruding, casting molding defoamer of polyamide acid amine resin Download PDFInfo
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- CN103144233A CN103144233A CN2013101038726A CN201310103872A CN103144233A CN 103144233 A CN103144233 A CN 103144233A CN 2013101038726 A CN2013101038726 A CN 2013101038726A CN 201310103872 A CN201310103872 A CN 201310103872A CN 103144233 A CN103144233 A CN 103144233A
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Abstract
The invention discloses an extruding, casting molding defoamer of polyamide acid amine resin. A vacuum chamber is arranged behind a die head; walls of the vacuum chamber are tightly connected; an air inlet is arranged at the bottom part; the front wall of the vacuum chamber is attached to the rear wall of the die head; the distance between the lower edge of the bottom of the vacuum chamber and a steel strip is smaller than or equal to the distance between the die head and the steel strip; a plurality of vacuum tubes at the top of the vacuum box are connected with a fan or a vacuum pump via a vacuum distribution box; the left and right ends of the air inlet are 0-80mm longer than the left and right ends of a lip of the die head; and the vacuum degree is -0.06MPa to -0.04MPa. In order to ensure the effect of the vacuum chamber, an auxiliary vacuum chamber similar with the structure is also arranged at the rear part; the vacuum chamber forms a vacuum environment at the rear part of the lip of the die head; the force for dragging a liquid film backwards is provided in vacuum when the steel strip drags the liquid film to advance; air is prevented from being involved between the liquid film and the steel strip; the liquid film is rapidly attached to the steel strip; two sides of the liquid film are prevented from shrinking; the problems of reduced breadth of a cast film and surface bubble after the vehicle speed is improved are solved; and installation, popularization and application are facilitated.
Description
Technical field
The present invention relates to the polyamide-acid polyimide resin and extrude the salivation forming technique, be specially a kind of polyamide-acid polyimide resin and extrude salivation moulding defoaming device.
Background technology
Kapton is the macromolecular material with excellent properties such as high strength, high tenacity, abrasion performance, high temperature resistant, anticorrosions, is widely used in the electrotechnical, electronic industry, particularly the main insulating materials of various high-grade electrical equipment especially in electrician trade.
At present the production technology of Kapton is take polyamic acid resin solution as raw material, and the salivation moulding obtains self-supporting polyamic acid thick film on slobbering machine, then processes and obtain Kapton through adding hot-stretch, imidization, cooling and shaping.For reducing the weight and volume of downstream application field product, the film thickness specification of the market demand is tending towards slimming.
The film of making the slimming of thickness specification not only needs the quality of polyamide-acid polyimide resin to improve, prevent the flaw of the film that minute impurities in the polyamide-acid polyimide resin and bubble cause, and the time more to make the liquid film gapless fit in ring steel belt in salivation, be involved in the surface quality that air produces aeration salivation sheet between avoiding both.The flaw defective on bubble causes salivation film surface not only affects the apparent of final products film, and flaw defective locations place is easily by high electrical breakdown, and failure of insulation can't use on electric and electronic product.
But existing slobbering machine salivation situation is as follows, and polyamide-acid polyimide resin solution is extruded rear salivation from die head becomes liquid film at steel band, and liquid film is along with ceaselessly operation forward of steel band.When steel belt operating speed strengthens, the impossible Complete Synchronization of liquid film extruded velocity and steel band speed, liquid film can lag behind than steel band under self gravitation and viscous effect, that is to say steel band will be in tow liquid film move forward, when liquid film is towed, both sides can be to internal contraction, the liquid film fabric width diminishes, and causes the both sides of the edge of liquid film to thicken, and is difficult for peeling off the normal production of impact from steel band.Secondly, during towing, liquid film not yet attaches on steel band, there is air both, after liquid film attaches on steel band, will have a large amount of gases because of being involved in air between liquid film and steel band, cause the liquid film surface to contain bubble, when the existence of these bubbles can cause the liquid film moulding, solvent evaporates is inhomogeneous, the final products film of gained salivation film processing apparent with influenced, Quality Down.When the slobbering machine speed of a motor vehicle was increased to more than or equal to 3.0m/min, the problems referred to above were more obvious.
Summary of the invention
The objective of the invention is to design a kind of polyamide-acid polyimide resin and extrude salivation moulding defoaming device, die head rear installation vacuum tank at slobbering machine, the opening of vacuum tank cavity is the steel band on drum before salivation, make liquid film below formation vacuum, reduce the air between liquid film and steel band, prevent that air is involved in liquid film and produces bubble, liquid film smoothly is attached on steel band rapidly.
The polyamide-acid polyimide resin of the present invention's design is extruded salivation moulding defoaming device, and steel band rouses before salivating, and die head rouses over top before being installed on salivation; This device comprises vacuum tank, vacuum tube, at the die head rear, vacuum tank is installed, the vacuum tank top is connected to vacuum tube, vacuum tank roof, front and rear wall and left and right wall are tightly connected, bottom opening is air inlet, inner chamber consists of vacuum chamber, the vacuum tank antetheca die head rear wall that reclines, the vacuum tank bottom lower along and the distance of steel band be less than or equal to the distance of die head and steel band.Vacuum tube connecting fan or vavuum pump.
During liquid film salivation moulding, vacuum tank is in die head lip rear formation vacuum environment, drum rotates before salivation, when steel band towing liquid film moves ahead, be in vacuum between liquid film and steel band and give liquid film and apply and drag backward the active force that pulls, offset moving ahead of steel band and produce the active force of towing, thereby avoid being involved in of air between liquid film and steel band to eliminate the liquid film blibbing, also prevent simultaneously liquid film both sides contraction, make liquid film be attached at rapidly steel band, improve the salivation film surface quality.
In order to make the inner vacuum environment that produces of vacuum tank vacuum uniformity everywhere along its length, consistent to guarantee that liquid film attaches the steel band each point, the vacuum tank top connects many vacuum tubes along its length, and vacuum tube is 150mm～300mm in the mouth of pipe spacing at defoaming device top.
Each vacuum tube is through vacuum distributor box connecting fan or vavuum pump.The vacuum of each root vacuum tube of vacuum distributor box balance.The vacuum of vacuum tank air inlet is-0.08～-0.02MPa, preferred version is-0.06～-0.04MPa.
In the two ends, left and right of die head lip, guarantee that liquid film both sides are subject to vacuum action for the vacuum action that makes vacuum tank, the left and right end of the air inlet of vacuum tank is than each long 0mm～80mm of two ends, left and right of die head lip.
For the effect to the place ahead liquid film of the vacuum environment that guarantees vacuum tank, at the vacuum tank rear, the assisted vacuum case is installed also, the assisted vacuum case is similar to vacuum box structure, the top of assisted vacuum case is connected to the assisted vacuum pipe, its roof, front and rear wall and left and right wall are tightly connected, and bottom opening is auxiliary air inlet, and inner chamber consists of the assisted vacuum chamber, the assisted vacuum case antetheca vacuum tank rear wall that reclines, assisted vacuum case bottom lower along the distance with steel band equal the vacuum tank bottom lower along with the distance of steel band.The assisted vacuum pipe connects accessory fan or backing vacuum pump.
There are many assisted vacuum distributing pipes the assisted vacuum box top, and each assisted vacuum pipe connects accessory fan or backing vacuum pump through the assisted vacuum distributor box.The vacuum of each root assisted vacuum pipe of assisted vacuum distributor box balance.The vacuum of the auxiliary air inlet of assisted vacuum case is identical with the vacuum of the air inlet of vacuum tank.The assisted vacuum environment that the auxiliary air inlet of assisted vacuum case forms is in the vacuum environment rear of vacuum tank, intercepts external pressure to the impact of vacuum tank.
The height of assisted vacuum case is identical with the height of vacuum tank, and the width of assisted vacuum case is 1/2 to 2/3 of the high width of vacuum tank, and the assisted vacuum pipe diameter of assisted vacuum case is 1/2 to 2/3 of vacuum tank vacuum tube diameter.The assisted vacuum mouth two ends of the left and right end of assisted vacuum case assisted vacuum mouth and vacuum tank are concordant.
Compared with prior art, the advantage that polyamide-acid polyimide resin of the present invention is extruded salivation moulding defoaming device is: after 1, slobbering machine is installed this device, solved salivation film fabric width after the speed of a motor vehicle improves and dwindled problem with blibbing, guaranteed the quality that subsequent thin film is processed; 2, existing slobbering machine need not dismounting and can install this device additional, and is easy to utilize.
Description of drawings
This polyamide-acid of Fig. 1 polyimide resin salivation liquid film adhering device example structure schematic diagram;
Fig. 2 is that the A of Fig. 1 is to view;
Fig. 3 is the vast schematic diagram of M part in Fig. 1.
The figure internal label is: 1, steel band, 2, die head, 3, vacuum tube, 4, vacuum tank, 5, the assisted vacuum pipe, 6, the assisted vacuum case, 7, drum before salivation, 8, liquid film.
The specific embodiment
This polyamide-acid polyimide resin is extruded salivation moulding defoaming device embodiment as illustrated in fig. 1 and 2, and steel band 1 is on the front drum 7 of salivation, and die head 2 is installed on front drum 7 over top of salivation, and die head 2 lips and steel band 1 distance are 0.5～3.0mm; At die head 2 rears, vacuum tank 4 and assisted vacuum case 6 are installed, vacuum tank 4 tops are connected to 6 vacuum tubes 3, and vacuum tube 3 is 200mm in the mouth of pipe spacing on vacuum tank 4 tops.Each vacuum tube 4 connects vavuum pump through the vacuum distributor box.
Assisted vacuum case 6 height equates with the height of vacuum tank 4, and assisted vacuum case 6 width are 2/3 of vacuum tank 4 width, the assisted vacuum pipe of assisted vacuum case 6
5Diameter is the vacuum tank vacuum tube
31/2 of diameter, the top of assisted vacuum case 6 are connected to 6 assisted vacuum pipes 5, and assisted vacuum pipe 5 is 200mm in the mouth of pipe spacing on assisted vacuum case 6 tops.Each assisted vacuum pipe 5 connects backing vacuum pump through the assisted vacuum distributor box.
Assisted vacuum case 6 roofs, front and rear wall and left and right wall are tightly connected, and bottom opening is auxiliary air inlet, assisted vacuum case 6 antethecas vacuum tank 4 rear walls that recline, under assisted vacuum case 6 bottoms along the distance with steel band 1 equal under vacuum tank 4 bottoms along with the distance of steel band 1.The left and right end of assisted vacuum case 6 air inlets and vacuum tank 4 air inlet two ends are concordant.
The vacuum of vacuum tank 4 and assisted vacuum case 6 air inlets is-0.06MPa.
As shown in Figure 3, during liquid film 8 salivation, under the status condition of salivation steel band speed of a motor vehicle 8.0m/min, steel band 1 towing liquid film 8 moves ahead, and forms angle θ between liquid film 8 and steel band 1, and 4 pairs of liquid films 8 of this routine vacuum tank apply direction active force backward, move after making liquid film drop on contact point on steel band, the θ angle increases, and the air capacity between liquid film 8 and steel band 1 reduces greatly, guarantee that namely the air that is involved in liquid film 8 greatly reduces, product salivation film blibbing amount reduces.
During existing slobbering machine liquid film 8 salivation, the salivation steel band speed of a motor vehicle keeps the state of 8.0m/min equally, and when steel band 1 towing liquid film 8 moved ahead, the contact starting point that the liquid film 8 of extruding from lip drops on steel band moved forward, liquid film
8With steel band
1Between the space increase, i.e. liquid film 8 moulding attach to the air capacity that is involved in the process of steel band and increase, product salivation film blibbing amount increases.
The polyamic acid self-supported membrane Contrast on effect data that the conventional slobbering machine salivation of the slobbering machine of this device and Comparative Examples produces are installed as shown in table 1:
Table 1
From the results shown in Table 1, defoaming device of the present invention still can make liquid film contact starting point with steel band near the lip projected position under higher speed of a motor vehicle state, and liquid film attaches to rapidly on steel band, greatly reduce the bubble in resin extruded salivation forming process, also avoided the contracting width.Therefore can improve the surface quality of polyamic acid self-supported membrane, be conducive to the high-quality Kapton of subsequent production.
Above-described embodiment is only the specific case that purpose of the present invention, technical scheme and beneficial effect are further described, and the present invention is defined in this.All any modifications of making, be equal to replacement, improvement etc., within all being included in protection scope of the present invention within scope of disclosure of the present invention.
Claims (10)
1. the polyamide-acid polyimide resin is extruded salivation moulding defoaming device, and steel band (1) rouses on (7) before salivation, drum (7) over top before die head (2) is installed on and salivates; It is characterized in that:
At die head (2) rear, vacuum tank (4) is installed, vacuum tank (4) top is connected to vacuum tube (3), vacuum tank (4) roof, front and rear wall and left and right wall are tightly connected, bottom opening is air inlet, vacuum tank (4) antetheca die head (2) rear wall that reclines, the lower distance that is less than or equal to die head (2) and steel band (1) along the distance with steel band (1) in vacuum tank (4) bottom, vacuum tube (3) connecting fan or vavuum pump.
2. polyamide-acid polyimide resin according to claim 1 is extruded salivation moulding defoaming device, it is characterized in that:
Described vacuum tank (4) top connects many vacuum tubes (3) along its length.
3. polyamide-acid polyimide resin according to claim 2 is extruded salivation moulding defoaming device, it is characterized in that:
Described each vacuum tube (3) is 150mm～300mm in the mouth of pipe spacing on vacuum tank (4) top.
4. polyamide-acid polyimide resin according to claim 2 is extruded salivation moulding defoaming device, it is characterized in that:
Each vacuum tube (3) is through vacuum distributor box connecting fan or vavuum pump.
5. according to claim 1 to 4, the described polyamide-acid polyimide resin of any one is extruded salivation moulding defoaming device, it is characterized in that:
The air inlet vacuum of described vacuum tank (4) is-0.08～-0.02MPa.
6. according to claim 1 to 4, the described polyamide-acid polyimide resin of any one is extruded salivation moulding defoaming device, it is characterized in that:
The air inlet vacuum of described vacuum tank (4) is-0.06～-0.04MPa.
7. according to claim 1 to 4, the described polyamide-acid polyimide resin of any one is extruded salivation moulding defoaming device, it is characterized in that:
The left and right end of described vacuum tank (4) air inlet is than each long 0mm～80mm of two ends, left and right of die head (2) lip.
8. according to claim 1 to 4, the described polyamide-acid polyimide resin of any one is extruded salivation moulding defoaming device, it is characterized in that:
Described vacuum tank (4) rear also is equipped with assisted vacuum case (6), its top is connected to assisted vacuum pipe (5), the roof of assisted vacuum case (6), front and rear wall and left and right wall are tightly connected, bottom opening is auxiliary air inlet, assisted vacuum case (6) antetheca vacuum tank (4) rear wall that reclines, assisted vacuum case (6) bottom lower along the distance with steel band (1) equal vacuum tank (4) bottom lower along with the distance of steel band (1); Assisted vacuum pipe (5) connects accessory fan or backing vacuum pump.
9. polyamide-acid polyimide resin according to claim 8 is extruded salivation moulding defoaming device, it is characterized in that:
Many assisted vacuum pipes (5) are arranged at described assisted vacuum case (6) top, and each assisted vacuum pipe (5) connects accessory fan or backing vacuum pump through the assisted vacuum distributor box; The air inlet vacuum of described assisted vacuum case (6) is identical with the air inlet vacuum of described vacuum tank (4).
10. polyamide-acid polyimide resin according to claim 8 is extruded salivation moulding defoaming device, it is characterized in that:
The height of described assisted vacuum case (6) is identical with the height of described vacuum tank (4), its width is 1/2 to 2/3 of vacuum tank (4) width, its length and vacuum tank (4) are equal in length, assisted vacuum pipe (5) diameter of assisted vacuum case (6) be vacuum tank (4) vacuum tube (3) diameter 1/2 to 2/3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310103872.6A CN103144233B (en) | 2013-03-28 | 2013-03-28 | Extruding, casting molding defoamer of polyamide acid amine resin |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310103872.6A CN103144233B (en) | 2013-03-28 | 2013-03-28 | Extruding, casting molding defoamer of polyamide acid amine resin |
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| CN103144233A true CN103144233A (en) | 2013-06-12 |
| CN103144233B CN103144233B (en) | 2015-04-15 |
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| CN201310103872.6A Active CN103144233B (en) | 2013-03-28 | 2013-03-28 | Extruding, casting molding defoamer of polyamide acid amine resin |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107030948A (en) * | 2016-12-30 | 2017-08-11 | 桂林电器科学研究院有限公司 | Polyamic acid resin solution based on die head angle attaches lip wall extrusion salivation method |
| CN110236280A (en) * | 2018-03-08 | 2019-09-17 | 南京德朔实业有限公司 | A kind of hair dryer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107030948A (en) * | 2016-12-30 | 2017-08-11 | 桂林电器科学研究院有限公司 | Polyamic acid resin solution based on die head angle attaches lip wall extrusion salivation method |
| CN107030948B (en) * | 2016-12-30 | 2019-03-19 | 桂林电器科学研究院有限公司 | Polyamic acid resin solution based on die head angle attaches lip wall and squeezes out salivation method |
| CN110236280A (en) * | 2018-03-08 | 2019-09-17 | 南京德朔实业有限公司 | A kind of hair dryer |
| CN110236280B (en) * | 2018-03-08 | 2023-12-12 | 南京泉峰科技有限公司 | Hair drier |
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| CN103144233B (en) | 2015-04-15 |
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