CN105291412B - A kind of slit air port plenum chamber film transversal stretching device - Google Patents
A kind of slit air port plenum chamber film transversal stretching device Download PDFInfo
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- CN105291412B CN105291412B CN201510821971.7A CN201510821971A CN105291412B CN 105291412 B CN105291412 B CN 105291412B CN 201510821971 A CN201510821971 A CN 201510821971A CN 105291412 B CN105291412 B CN 105291412B
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Abstract
The present invention is a kind of slit air port plenum chamber film transversal stretching device, respectively there is a slit air port plenum chamber in the baking oven of stretch section 2~7, its air port be above and/or under straight slit air port, slit air port is 20 °~80 ° with the angle [alpha] of film direction of advance, with in each section of reduction of baking oven porch film solvent, angle [alpha] increase.The length in slit air port is the width of L × Sin α >=oriented film.Adjacent slit air port plenum chamber is end to end, and the angle of cut in the two slit air port is 30 °~150 °, and the spacing of adjacent slit air port plenum chamber head and the tail is 0~50mm.Slit air port width is stated for 0.5mm~20mm.The hot blast temperature in slit air port is 130 DEG C~300 DEG C.Lateral cross section each point is stretched successively when film moves ahead in the present apparatus, and slit air port hot blast concentrates on an oblique line, and place's temperature of being heated is uniform and stable, therefore film gauge uniformity is improved to 2.0%；Improve mechanical property and film surface quality.
Description
Technical field
The present invention relates to Kapton manufacturing technology field, specially a kind of slit air port plenum chamber film transverse direction
Stretching device.
Background technology
Kapton is the high score with excellent properties such as high intensity, high tenacity, abrasion performance, high temperature resistant, anticorrosions
Sub- material, is the predominating insulation for making various medium-to-high grade electrotechnical, electronic components, is widely used in electrotechnical, electronic industry.Mesh
The manufacturing process of preceding Kapton is that, with polyamic acid resin solution as raw material, salivation is obtained having and propped up certainly on slobbering machine
The Polyamic Acid Film of support property, then obtain Kapton by heating stretching, imidization, cooling and shaping treatment.
As downstream application product is light, thin, short, small and High Reliability Design requirement, the film thickness specification of the market demand
Tend to slimming, requirement higher is proposed to its thickness evenness.
In film manufacturing processes, the self-supporting Polyamic Acid Film that slobbering machine is sent out will be stretched by longitudinal and transverse two directions
And high temperature furnace imidization treatment forms Kapton.
In cross directional stretch, film need to be heated.Existing self-supporting Polyamic Acid Film enters transverse drawing mill
Baking oven after, its whole lateral cross section is subject to horizontal hot blast treatment simultaneously, under the clamping of two side chain pincers film by cross directional stretch, and
Solvent volatilizees, carries out imidization simultaneously.
The stretch section of current transverse drawing mill is generally divided into multistage baking oven, is 2 or 3 plenum chambers in every section of baking oven.It is conventional
Plenum chamber be wind circulating heater, using air heat exchanger heat wind, upper, lower horizontal to uniform hot-blast outlet simultaneously to thin
The upper and lower surface blowout hot blast of film is heated.It is to allow film to be heated evenly, hot air flow monitoring probe is provided with inside plenum chamber,
Control by the control realization to hot air flow to hot blast wind speed, then realize static pressure by the regulation and control of the adjusting valve of each hot-air mouth
The horizontal homogeneity of hot blast in case, it is desirable to the film lateral surfaces temperature difference≤± 1.0 DEG C/m.
But existing film drawer hot air heating apparatus are difficult to ensure that film surface transverse temperature is uniform.Conventional equipment heat
Wind enters from big pipeline, is sent out by hot-air mouth through each small branch pipe.Due to the rectangular box body structure of plenum chamber, hot blast flows through respectively
Suffered resistance is different during individual different parts, causes wind speed everywhere different, it is impossible to form uniform and stable air-flow, it is easy to occur
Vortex.Even have that some position wind speed are minimum or hot blast is not reached at all in plenum chamber, the film in this position be heated it is few,
Therefore draw ratio is just small, and film solvent evaporation amount herein is also few, imidization low degree.The heat distribution of film surface is not
, cross directional stretch is irregular, causes cross directional stretch rear film in uneven thickness, and it is poor to also result in film film roll flat appearance, shadow
Ring Kapton product quality.
" hot blast for film stretching production line flows the Chinese utility model patent CN203994319 of bulletin in 2014
Device ", scheme is the setting air intake homogenizing plate after air inlet, and at least two panels is set between the return air duct in plenum chamber cavity
The inside homogenizing plate for staggeredly disposing.The steady air current of plenum chamber inside cavity can be made uniform, vortex is not produced.Improve air outlet
Flow out the stable and uniform of hot blast.But this device cannot still solve to exist in plenum chamber cavity the dead angle that hot blast can not reach or
Person's hot blast intersection region, the stabilization of hot blast wind speed and the uniformity of film surface temperature do not obtain substance in plenum chamber cavity
Improve.This kind of current equalizer complex structure, it is relatively costly.
The content of the invention
The purpose of the present invention is a kind of slit air port plenum chamber film transversal stretching device of design, polyamide to be tensioned
Sour film passes sequentially through 2~7 slit air port plenum chambers, the air port of slit air port plenum chamber be above and/or under straight line
Slit air port, slit air port is 20 °~80 ° with the angle of film direction of advance, is distributed on the plenum chamber tank wall of slit air port both sides
There are multiple return air inlets.
A kind of slit air port plenum chamber film transversal stretching device of present invention design, including the track of both sides and in-orbit
The chain pincers component run on road, chain pincers component clamping film two side, stretch section is divided into 2~7 baking ovens, has static pressure in each baking oven
Case, chain pincers clamping film passes sequentially through each plenum chamber, there is hot blast air port in plenum chamber；Film draw ratio≤1.35；The present invention
Have a slit air port plenum chamber in each baking oven, the air port in the plenum chamber of slit air port be above and/or under straight line it is narrow
Seam air port, slit air port is 20 °~80 ° with the angle [alpha] of film direction of advance, and the length in the slit air port of each plenum chamber is L, L
The width of × Sin α >=oriented film.
With the reduction in solvent contained by each stretch section baking oven porch Polyamic Acid Film, each slit air port is quiet
The slit air port of case is pressed to increase with the angle of film direction of advance.
Adjacent baking oven is end to end before and after described, the friendship in the slit air port plenum chamber slit air port in two adjacent baking ovens
Angle is 30 °~150 °, and the spacing of the slit air port plenum chamber head and the tail in the front and rear adjacent baking oven is 0~180mm.
Slit air port width is 0.5mm~20mm, preferably 2mm~12mm.
The hot blast temperature in each plenum chamber slit air port is 130 DEG C~300 DEG C, and preferred version is 160 DEG C~220 DEG C.
Polyamic Acid Film solvent at present apparatus import is 10~60%, and preferred range is 20~42%.This dress
Put film solvent≤18% in exit.
Compared with prior art, a kind of advantage of slit air port plenum chamber film transversal stretching device of the invention is：1、
Because the slit air port of slit plenum chamber is less than 90 degree with the angle of film direction of advance, therefore film normal is in direction of advance
Cross section be not while receive the hot wind action in slit air port, the film being only heated could in the presence of two side chain pincers quilt
Cross directional stretch, therefore as film moves ahead in the present apparatus, film lateral cross section each point is stretched successively, and slit air port hot blast is concentrated on
One oblique line of film surface, place's temperature of being heated is uniform and stabilization, therefore film thickness cross-sectional direction uniformity improve to
2.0%；2nd, multiple plenum chambers can adjust each slit air port and film advance according to the change of solvent in film traveling process
The angle and hot blast temperature in direction, improve the mechanical performance indexs such as Kapton product tensile strength and elongation；
3rd, Kapton product surface quality is improved, film roll flatness, appearance investigation is improved；4th, present apparatus simple structure, operation
It is convenient.
Brief description of the drawings
Fig. 1 is this slit air port plenum chamber film transversal stretching device embodiment overall structure diagram.
Fig. 2 is Section A-A schematic diagram in Fig. 1.
In figure marked as：
1st, film, 2, chain pincers, 3, first order slit air port plenum chamber, 31, casing, 32, slit air port, 33, return air inlet,
4th, second level slit air port plenum chamber, 5, third level slit air port plenum chamber.
Specific embodiment
This slit air port plenum chamber film transversal stretching device example structure is as illustrated in fig. 1 and 2.Rail including both sides
Road and the chain pincers component 2 for orbiting, 1 liang of side of the clamping film of chain pincers component 2, at the import of film 1 width be 1050mm,
Exit is 1180mm, and draw ratio is 1.12.This example arranges the first order to three sections of baking ovens of the third level along the direct of travel of film 1, often
One slit air port plenum chamber is installed, the slit air port of each slit air port static pressure box body 31 is right up and down in section baking oven
The straight slit air port 32 of title, the width of slit air port 32 is 5mm.It is distributed respectively on the both sides static pressure box body 31 of slit air port 32
There are multiple return air inlets 33.Polyamic Acid Film solvent is 36% at the import of present apparatus first order slit air port plenum chamber 3,
The slit air port of first order slit air port plenum chamber 3 and the angle α of the direct of travel of film 11=36 °, the length L in slit air port1
=1855mm, air port hot blast temperature is 158 DEG C；Film solvent is 30%, the second level at the baking oven import of the present apparatus second level
The slit air port of slit air port plenum chamber 4 and the angle α of film direct of travel2=52 °, its slit air port and first order slit
The angle of cut in the slit air port of formula air port plenum chamber 3 is β1=92 °, the spacing of the two head and the tail is 120mm.The length L in slit air port2=
1440m, air port hot blast temperature is 186 DEG C；Polyamic Acid Film solvent at the import of present apparatus third level slit air port plenum chamber 5
Content is 24%, the slit air port of third level slit air port plenum chamber 5 and the angle α of film direct of travel3=64 °, its is narrow
Seam air port is β with the angle of cut in the slit air port of second level slit air port plenum chamber 42=64 °, the spacing of the two head and the tail is 90mm.
The length L in slit air port3=1313mm, air port hot blast temperature is 215 DEG C.
Comparative example is hot-air mouth uniform up and down in common transverse stretching machine, plenum chamber, three sections of hot blast temperature difference of plenum chamber
It is 145 DEG C, 170 DEG C, 195 DEG C, processes identical Polyamic Acid Film, width is that 1050mm, exit are at film import
1180mm.The performance of the present embodiment and comparative example gained Kapton is as shown in table 1.
The present embodiment of table 1 and comparative example gained Kapton heat, physical property comparison sheet
From table 1, the present embodiment and comparative example are in the film of porch, and thickness, solvent and imines rate are homogeneous
Together, by after identical draw ratio, the thickness of the two transversal stretching device exit film, solvent and imines rate also phase
Together.But the thickness evenness and shrinkage factor after the present embodiment cross directional stretch through the film product obtained by same imidization treatment have
Significantly improve, modulus, tensile strength and elongation improve.Apparatus of the present invention cross directional stretch gained film quality is obtained
Improve.
Above-described embodiment, only the purpose of the present invention, technical scheme and beneficial effect are further described is specific
Individual example, the present invention is not limited to this.All any modifications made within the scope of disclosure of the invention, equivalent, change
Enter, be all contained within protection scope of the present invention.
Claims (10)
1. a kind of track of slit air port plenum chamber film transversal stretching device, including both sides and the chain pincers for orbiting
Component, chain pincers component clamping film two side, stretch section is divided into 2~7 baking ovens, there is plenum chamber, the clamping of chain pincers in each baking oven
Film passes sequentially through each plenum chamber, there is hot blast air port, film draw ratio≤1.35 in plenum chamber；It is characterized in that：
Have a slit air port plenum chamber in each baking oven, the air port of slit air port plenum chamber be above and/or under straight line
Slit air port, slit air port is 20 °~80 ° with the angle [alpha] of film direction of advance, and the length in slit air port is L, and L × Sin α are big
In or equal to oriented film width.
2. plenum chamber film transversal stretching device in slit air port according to claim 1, it is characterised in that：
With the reduction in solvent contained by each section of plenum chamber porch Polyamic Acid Film, each slit air port static pressure
The slit air port of case increases with the angle [alpha] of film direction of advance.
3. plenum chamber film transversal stretching device in slit air port according to claim 1, it is characterised in that：
Slit air port width is 0.5mm~20mm.
4. plenum chamber film transversal stretching device in slit air port according to claim 1, it is characterised in that：
Slit air port width is 2mm~12mm.
5. plenum chamber film transversal stretching device in slit air port according to claim 1, it is characterised in that：
The hot blast temperature in each plenum chamber slit air port is 130 DEG C~300 DEG C.
6. plenum chamber film transversal stretching device in slit air port according to claim 1, it is characterised in that：
Each plenum chamber slit air port hot blast temperature is 160 DEG C~220 DEG C.
7. plenum chamber film transversal stretching device in slit air port according to claim 1, it is characterised in that：
The front and rear adjacent baking oven is end to end, and the angle of cut in the slit air port plenum chamber slit air port in two adjacent baking ovens is
30 °~150 °.
8. plenum chamber film transversal stretching device in slit air port according to claim 7, it is characterised in that：
The spacing of the slit air port plenum chamber head and the tail in the front and rear adjacent baking oven is 0~180mm.
9. plenum chamber film transversal stretching device in slit air port according to claim 1, it is characterised in that：
Polyamic Acid Film solvent at present apparatus import is 10~60%, the Kapton solvent in exit
≤ 18%.
10. plenum chamber film transversal stretching device in slit air port according to claim 1, it is characterised in that：
Polyamic Acid Film solvent at present apparatus import is 20~42%, the Kapton solvent in exit
≤ 18%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510821971.7A CN105291412B (en) | 2015-11-24 | 2015-11-24 | A kind of slit air port plenum chamber film transversal stretching device |
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| CN201510821971.7A CN105291412B (en) | 2015-11-24 | 2015-11-24 | A kind of slit air port plenum chamber film transversal stretching device |
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| CN105291412A CN105291412A (en) | 2016-02-03 |
| CN105291412B true CN105291412B (en) | 2017-06-16 |
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| CN112497696B (en) * | 2020-12-01 | 2022-11-15 | 深圳市英诺美达科技有限公司 | Production process of nano material modified polyolefin resin film |
| CN112936832B (en) * | 2021-01-27 | 2022-10-04 | 山东森荣新材料股份有限公司 | PTFE electronic film production expander |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101801644A (en) * | 2007-09-21 | 2010-08-11 | 住友化学株式会社 | Process for producing phase difference film of thermoplastic resin |
| CN102441987A (en) * | 2011-09-19 | 2012-05-09 | 桂林电器科学研究院 | Chain clip cooling device for film producing machine |
| CN205185295U (en) * | 2015-11-24 | 2016-04-27 | 桂林电器科学研究院有限公司 | Slit formula wind gap static pressure case film lateral stretching device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5332234B2 (en) * | 2007-03-29 | 2013-11-06 | 東洋紡株式会社 | Polyethylene terephthalate resin film roll and method for producing the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101801644A (en) * | 2007-09-21 | 2010-08-11 | 住友化学株式会社 | Process for producing phase difference film of thermoplastic resin |
| CN102441987A (en) * | 2011-09-19 | 2012-05-09 | 桂林电器科学研究院 | Chain clip cooling device for film producing machine |
| CN205185295U (en) * | 2015-11-24 | 2016-04-27 | 桂林电器科学研究院有限公司 | Slit formula wind gap static pressure case film lateral stretching device |
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