CN104497329B - Polyamic Acid Film, its salivation equipment and the preparation method that a kind of side thickeies - Google Patents
Polyamic Acid Film, its salivation equipment and the preparation method that a kind of side thickeies Download PDFInfo
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Abstract
Polyamic Acid Film, its salivation equipment and the preparation method thickeied the invention discloses a kind of side, belongs to field of film preparation.Gradually increase with close to outer edge thickness in the range of the wide X of two side parts of this film transverse direction, X=20~200mm, film thickness distribution is symmetrical with film longitudinal centre line.Lip aperture in the range of the long Y of two side parts of molding die lip of this salivation equipment gradually increases with close to outer rim aperture, and lip aperture is symmetrical with lip longitudinal centre line.This preparation method is to adjust molding die lip bolt, to obtain required molding die lip.The enlarged in thickness of two side parts of film of the present invention is allowed to intensity increase, thereafter the thin film strength increase of the origin of force of process clamping device, avoids taking off pincers caused by clipping broken, pulling open or dropout, edge damage, product yield greatly improve；The salivation equipment and preparation method of the present invention is easily achieved, and need to only adjust lip bolt, increases the aperture of lip both sides.
Description
Technical field
The present invention relates to Kapton technology of preparing, is specially Polyamic Acid Film, its stream that a kind of side thickeies
Saliva equipment and preparation method.
Background technology
Kapton is the high score for having the excellent properties such as high intensity, high tenacity, abrasion performance, high temperature resistant, corrosion-resistant
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 preparation process of preceding Kapton is using polyamic acid resin solution as raw material, is salivated on slobbering machine and obtains self-supporting
Polyamic Acid Film, then handle to obtain Kapton by heating stretching, high temperature imidization, cooling and shaping.
As downstream application product is light, thin, short, small and high reliability design requirement, the film thickness rule of the market demand
Lattice tend to be thinned, and the requirement of higher is proposed to its technology of preparing, product quality particularly product yield.
In Kapton preparation process, required for the conventional manufacturing process using drawing and setting or tensioning sizing reaches
Thickness and traditional performance.It is required to grip Kapton semi-finished product polyamic acid when drawing and setting or tensioning sizing
Two sides of film, apply horizontal force, i.e., to thin by the clamping device of film both sides to film under the high temperature conditions
Film carries out cross directional stretch.It is also required to grip film two sides during longitudinal stretching, avoids film from deforming and subtract to central reduction
Small width.
Such as during Kapton production, typically polyamic acid resin is molded by salivating mode on slobbering machine
For Polyamic Acid Film, imidization processing is carried out by high temperature furnace afterwards Kapton is made.Will in imidization
The bilateral of semi-finished product film grips, and film is carried out cross directional stretch or tensioning processing under clamp position, and keep this shape
State completes high temperature imidization, to improve the traditional performance of film.
The clamping device of existing film line both sides be mainly installed in ring-shaped guide rail chain on chain pincers or
Pin is buckled.Vertically and horizontally stretching is intended to carry out film high-temperature process, and the imidization of particularly Polyamic Acid Film needs higher temperature
Processing, maximum processing temperature is up to 500 DEG C.Chain in production line and chain pincers thereon or pin are buckled warm in high temperature environments
Degree also increases, when stretching entry position clamping film easily because high temperature causes film side to clip broken or tear, side
The film of side breakage follow-up stretching, imidization, shape and open folder etc. in technical process easily in chain pincers pincers mouth position or
Pin, which is buckled thorn button bit and put, to be caused de- pincers or dropout and is pulled open, and reduces film stretching quality, or even film can not normally be wound, and be reduced
Film product yield, seriously affects film line yield.
Meanwhile the edge of Polyamic Acid Film upwarps phenomenon due to too thin easily produce, chain pincers makes film side when clamping
It is folded into double-deck side.High temperature is run into double-deck side clamping process so that chain pincers clip position film is easily torn, and again results in production
Product cannot normally be wound, and reduce film product yield.
In actual production line, the pincers of opening of Kapton is closely located to traction wrap-up, and film is drawn when driving pincers
Stretch the comprehensive functions such as stress, drawing tension and winding tension and the rupture of membranes phenomenon such as raw edges, transverse breakage easily occur, thus film without
Method is normally wound, and seriously affects thin film yield, reduces film yield.
, there is relevant patent Shen in recent years in the problems such as in order to solve edge damage, film breakage in Kapton preparation process
Please, such as Chinese utility model patent " the entering pincers guide device of membrane production equipment ", openly that notification number is CN202245464U
Number for the Chinese invention patent " the chain pincers cooling device of film production machinery " of CN102441987A, Publication No.
In the Chinese invention patent " film line in advance clip opening device " of CN102431161A, Publication No. CN102390112A
State's patent of invention " film drawing and setting or the film clamping device of film for being tensioned modular system ", notification number are in CN203236699U
State's utility model patent " one kind solves film stretching rupture of membranes and thickness homogeneous system ", fills wherein individually disclosing and being guided into pincers
Put, chain pincers cooling device, in advance clip opening device and clamping device etc., although making clamping device cause to clip broken or Tear Film
Some reductions of the problem of side, but fail to that such failure is completely eliminated.And these devices are required to existing production line
Equipment is transformed or replaced, and apparatus structure is complex, also needs higher improvement cost, therefore is difficult to be widely implemented application.
In addition the Chinese invention patent " adhesive tape processing method in film production of slobbering machine " of Publication No. CN102416684A, public affairs
Chinese invention patent " method for adhesive tape treatment in production of thin film by casting machine " that the number of opening is CN102303388A, notification number are
Chinese utility model patent " polyimide film producing device of automatic erasing releasing agent " of CN202147343U etc. is to pass through
Improving manufacturing process processing salivation adhesive tape causes rupture of membranes, film breakage etc. abnormal, and adjusting technological parameter is more, and adjustable range is big, especially
Be introduce such as wiping releasing agent can cause film too it is smooth can not normal use in the side effect of downstream product.
The content of the invention
The Polyamic Acid Film thickeied the purpose of the present invention is designing a kind of side, film one fixed width of horizontal two side parts
Gradually increase with close to outer edge thickness in the range of degree, increase therewith because film both sides are clamped part thickness and increase its intensity, quilt
No longer clipped broken during clamping or the failure of raw edges, ensure that the quality of film, improve thin film yield.
A kind of salivation equipment of the Polyamic Acid Film thickeied it is another object of the present invention to design side, polyamic acid are molten
The side parts aperture of molding die lip certain length gradually increases with close to outer rim aperture used in the salivation of liquid, makes gained poly-
Amic acid salivation liquid film laterally gradually increases in the range of two side parts one fixed widthes with close to outer edge thickness.
Another object of the present invention is the preparation method for the Polyamic Acid Film that a kind of side of design thickeies, in polyamic acid
When solution salivates, salivation molding die lip is adjusted, makes the side parts aperture of molding die lip certain length with outside
Edge aperture gradually increases, and obtains laterally in the range of two side parts one fixed widthes with the polyamide gradually increased close to outer edge thickness
Acid salivation liquid film, obtains the self-supporting Polyamic Acid Film that laterally two side parts thicken, to ensure film after drying processing
No longer clipped broken when clamped or the failure of raw edges.
The Polyamic Acid Film that a kind of side that the present invention designs thickeies, in the range of its horizontal wide X of two side parts
Gradually increase with close to outer edge thickness, the X=20~200mm, preferred range is X=60~120mm.Central film portion thickness is
H, reinforcement thickness are h, and the maximum of h ＞ H, h are (1.2~3) H.A and A ' on the bottom line of Polyamic Acid Film cross section
Point and the distance of bottom line homonymy outer rim be X, some on bottom line on the outside of A is put and the distance of homonymy film outer rim is x, the point it is thin
Film thickness is h, h=a1(X-x)n/109+a2(X-x)n-1/107+a3(X-x)n-2/105+a4(X-x)/103+ H, n be 2~4 it is whole
Number, 1.5 ＞ a10,1.0 ＞ a of ＞2＞ -1.0,1.0 ＞ a3＞ -1.0,0 ＞ a4＞ -1.0.The thickness distribution of Polyamic Acid Film with
Film longitudinal centre line is symmetrical.
The salivation equipment for the Polyamic Acid Film that side that the present invention designs thickeies, including molding die, carrying salivation into
The circulation steel band and hot-air oven of type polyamic acid liquid film, the lip in the range of the long Y of its two side parts of molding die lip
Aperture gradually increases with close to outer rim aperture, and the horizontal two side parts one fixed widthes of gained salivation polyamic acid liquid film are with outside
Edge thickness increases.Y=20~the 200mm, preferred range are Y=60~120mm.Aperture is W in the middle part of molding die lip,
Molding die lip aperture is w in the range of Y, and the maximum of w ＞ W, w are (1.2~3) W.In the plane immediately ahead of lip with steel
B and B ' points and the distance of homonymy lip outer end on the vertical straight line M in tape travel direction are Y, lip aperture between B, B ' two point
For W, some point and the distance of homonymy lip outer end on straight line M on the outside of B are y, and the lip aperture of the point is w,
W=b1(Y-y)n/109+b2(Y-y)n-1/107+b3(Y-y)n-2/105+b4(Y-y)/103+ W, n are 2~4 integer,
1.5 ＞ b10,1.0 ＞ b of ＞2＞ -1.0,1.0 ＞ b3＞ -1.0,0 ＞ b4＞ -1.0.The lip aperture of molding die is indulged with lip
It is symmetrical to center line.
The preparation method for the Polyamic Acid Film that the side that the present invention designs thickeies, the polyamic acid solution of synthesis is through shaping
Mould salivates on steel band becomes polyamic acid liquid film, is loaded with the steel band of polyamic acid liquid film and becomes certainly by hot-air oven drying
The Polyamic Acid Film of support.When polyamic acid solution salivates, molding die lip bolt is adjusted, makes molding die lip two
Lip aperture in the range of the long Y of side parts gradually increases with close to outer rim aperture, the Y=20~200mm, molding die lip
Aperture is W in the middle part of mouthful, and molding die lip aperture is w in the range of Y, and the maximum of w ＞ W, w are (1.2~3) W.Molding die
Lip aperture it is symmetrical with lip longitudinal centre line.Adjust on molding die lip both ends along bolt, make molding die lip two
Hold and upwarped on the lip of the long Y scopes of side parts along outer end, lower edge is still horizontal linear；Or adjust molding die lip both ends
Upper edge and lower along bolt, makes to upwarp along both ends on molding die lip, lower along curved under both ends.
Intensity in order to allow Polyamic Acid Film two sides further improves, and adjusts in hot-air oven at the top of each plenum chamber
Air outlet, makes the air outlet at the top of the plenum chamber one long Z scopes of side parts for discharging air port with gradual close to side wall, bore
Increase, makes gradually to increase in the range of the side parts one fixed width of plenum chamber transverse direction, with close to static pressure box wall air quantity, static pressure
The hot wind wind pressure of middle part film surface is F in case, and the hot wind wind pressure of the film surface of two side parts is f, the maximum of f ＞ F, f
It is worth for (1.2~3) F.
Because the hot wind wind pressure of two side parts film surfaces in plenum chamber is big compared with middle part, the avris of polyamic acid liquid film transverse direction
Gradually increase in the range of the width X of part, with the evaporation capacity close to outer rim solvent, after saliva oven is handled, obtained self-supporting
It is gradually reduced in the range of the wide X of horizontal two side parts of Polyamic Acid Film, with close to outer rim solvent content, therefore gained self-supporting
The intensity of Polyamic Acid Film both sides edge improves, to be clipped broken when preventing that film is clamped or the failure of raw edges.
The method of Polyamic Acid Film two sides intensity is further improved in addition, in self-supporting Polyamic Acid Film from steel band
After upper stripping, the side parts in the range of film X=20~200mm carry out local heating, the heating of side parts film surface
Temperature is 150~200 DEG C, and heating time is 8 seconds~80 seconds.Film side parts by heating partly evaporate again because of solvent
Content further reduces, amination rate improves, its intensity is strengthened.
Compared with prior art, the Polyamic Acid Film of side thickening of the present invention, its salivation equipment and preparation method is excellent
Put and be：1st, the thickness of two side parts of Polyamic Acid Film is more than interior thickness, and the increasing of thickness is allowed to intensity increase, i.e., herein
The chain pincers of clamping device or the thin film strength increase of fibula origin of force, make caused by clipping broken, pulling open when post-tensioning or tensioning
De- pincers or dropout failure no longer occur, and from the point of view of testing, edge damage, the situation of film breakage almost no longer occur, and film product yield is big
It is big to improve；2nd, the preparation method for the Polyamic Acid Film that both sides of the present invention thicken is easily achieved, and need to only adjust the lip of molding die
Mouth bolt, you can increase the aperture of lip both sides, obtain the polyamic acid salivation liquid film of both sides thickening.
Brief description of the drawings
Fig. 1 is the cross-sectional view for the Polyamic Acid Film embodiment that this side thickeies.
The 1 molding die lip of salivation apparatus embodiments for the Polyamic Acid Film that Fig. 2 thickeies for this side faces signal
Figure.
The 2 molding die lip of salivation apparatus embodiments for the Polyamic Acid Film that Fig. 3 thickeies for this side faces signal
Figure.
Figure label is：1st, film, 2, molding die lip.
Embodiment
The Polyamic Acid Film embodiment that side thickeies
The cross section for the Polyamic Acid Film embodiment that this side thickeies is as shown in Figure 1, its two horizontal side parts, width
Gradually increase with close to outer edge thickness in the range of X=100mm, 1 interior thickness H=0.06mm of film, edge thickness is most outside side
Greatly 0.131mm, the distance that the A and A ' of 1 both sides of film are put respectively away from 1 outer rim of homonymy film is X=100mm, some on the outside of A
Point and the distance of 1 outer rim of homonymy film are x, and 1 thickness of film of the point is h, this example n=4,
H=0.073 (X-x)4/109+0.069(X-x)3/107+0.613(X-x)2/105-0.045(X-x)/103+0.06
Outer most edge x=0,
H=0.073 × 108/109+0.069×106/107+0.613×104/105-0.045×102/103+ 0.06=
0.131mm。
The thickness distribution of Polyamic Acid Film 1 is symmetrical with film longitudinal centre line.
Using the film that uniform thickness is D=60 μm as comparative example, with the present embodiment film in the identical drawing of identical temperature
Stretch and cross directional stretch, longitudinal stretching and the following process experiment for being tensioned imidization, the two result such as institute of table 1 are carried out than under the conditions of
Show：
1 the present embodiment of table and comparative example following process situation comparison sheet
From the results shown in Table 1, the Polyamic Acid Film thickeied using the side of the present embodiment is in following process mistake
The edge damage number of horizontal drawing process is only the 1.2% of traditional films in journey.Vertical draw is significantly reduced with edge damage number in imidization process,
Total film breakage number on Production Line for Polyimide Film tends to 0, and product yield is up to 96.0%, and product yield is up to 92.0%.
The salivation apparatus embodiments 1 for the Polyamic Acid Film that side thickeies
The salivation equipment for the Polyamic Acid Film that this example side thickeies, including molding die, carrying polyamic acid liquid film
Steel band and hot-air oven are circulated, the molding die of this example is salivation mouth, its 2 front view of lip is as shown in Fig. 2, the middle part of lip 2 is opened
W=0.262mm is spent, is upwarped on the lip 2 of the 2 long Y=100mm scopes of both ends side parts of salivation lip mouth along outer end, lower edge is still
For horizontal linear, aperture gradually increases with close to outer rim, aperture in the range of 2 both sides 100mm of lip, in 2 both ends aperture of lip most
Greatly 0.574mm, is Y=100mm in B and B ' point and the distance of 2 outer end of homonymy lip of 2 lower edge of lip, B in 2 lower edge of lip
Some point and the distance of 2 outer end of homonymy lip in outside are y, and 2 aperture of lip of the point is w, this example n=4,
W=1.313 (Y-y)4/109+0.838(Y-y)3/107+0.975(Y-y)2/105-0.009(Y-y)/103+
0.262。
2 aperture of lip for salivating mouth is symmetrical with lip longitudinal centre line.
Gained polyamic acid liquid film interior thickness is 0.262mm, and both sides of the edge maximum gauge is 0.574mm.After drying
The Polyamic Acid Film that the side of above-described embodiment thickeies can be made.The salivation equipment for the Polyamic Acid Film that side thickeies is real
Apply example 2
Molding die is extrusion die in the salivation equipment for the Polyamic Acid Film that the side of this example thickeies, its lip 2 is just
View is lower along curved under both ends, aperture W=0.262mm in the middle part of lip, lip as shown in figure 3, upwarped on extrusion die lip along both ends
2 aperture of lip of mouthful long Y=100mm scopes of 2 both ends side parts, gradually increase with close to outer rim aperture, is opened at 2 both ends of lip
Degree be up to 0.574mm, B and B ' point on 2 positive frontal plane of lip perpendicular to steel band direction of advance, it is equidistant with upper lower edge
On center line, B and B ' points and the distance of homonymy lip outer end be Y=100mm, some point on above-mentioned center line on the outside of B with together
The distance of 2 outer end of lateral lip mouth is y, and 2 aperture of lip at the position is w, this example n=4,
W=1.313 (Y-y)4/109+0.838(Y-y)3/107+0.975(Y-y)2/105-0.009(Y-y)/103+
0.262。
2 aperture of lip of extrusion die is symmetrical with lip longitudinal centre line.
The salivation equipment other parts of this example are identical with above-mentioned salivation apparatus embodiments 1.
The preparation method embodiment 1 for the Polyamic Acid Film that side thickeies
The polyamic acid solution that the preparation method embodiment 1 for the Polyamic Acid Film that this side thickeies synthesizes is through molding die
Into polyamic acid liquid film, be loaded with the steel band of polyamic acid liquid film becomes self-supporting by hot-air oven drying for salivation on steel band
Polyamic Acid Film, the molding die of this example polyamic acid solution salivation is salivation mouth, its 2 front view of lip is as shown in Fig. 2, lip
2 middle part aperture W=0.262mm of mouth, adjust on 2 both ends of salivation lip mouth along bolt, make 2 both ends side parts length of salivation lip mouth
Upwarped on the lip 2 of Y=100mm scopes along outer end, lower edge is still horizontal linear, and aperture is with connecing in the range of 2 both sides 100mm of lip
Nearly outer rim, aperture gradually increase, and are up to 0.574mm in 2 both ends aperture of lip, obtain the Polyamic Acid Film of side thickening
Salivate the salivation mouth of apparatus embodiments 1.
Also the salivation mouth of the curve through especially processing on edge on lip 2 can be selected, upwarped on lip 2 along both ends, lower edge is still
Horizontal linear, the aperture of the long Y=100mm scopes of 2 both ends side parts of lip gradually increase with close to outer rim aperture.Root during salivation
According to the requirement of different film thicknesses, different salivation mouths is selected.
In this example hot-air oven at the top of each plenum chamber the side parts air outlet of the horizontal long 100mm scopes in top with close to side
Wall, bore gradually increase, and make in the range of the side parts 100mm of plenum chamber transverse direction, with gradual close to static pressure box wall air quantity
Increase, the maximum hot wind wind pressure of two side parts film surfaces is the 2 of the hot wind wind pressure of middle part film surface in this example plenum chamber
Times.
After this example self-supporting Polyamic Acid Film is peeled off from steel band, it is provided with above the side parts of film 100mm
Heating tube carries out local heating, and side parts film surface heating-up temperature is 165 DEG C, and heating time is 65 seconds.
Equally using the film that uniform thickness is D=60 μm as comparative example, the film with the present embodiment processing is in identical temperature
Spend under identical draw ratio and carry out cross directional stretch, longitudinal stretching and the following process experiment for being tensioned imidization, the two knot
Fruit is as shown in table 2：
The film and comparative example film following process situation comparison sheet of 2 the present embodiment of table processing
From the results shown in Table 2, the Polyamic Acid Film thickeied using the side of the present embodiment is in following process mistake
The edge damage number of horizontal drawing process is only the 0.2% of traditional films in journey.Vertical draw is significantly reduced with edge damage number in imidization process,
Total film breakage number on Production Line for Polyimide Film tends to 0, and product yield tends to 100.0%, and product yield is up to 98.0%.
The preparation method embodiment 2 for the Polyamic Acid Film that side thickeies
The molding die of this example polyamic acid solution salivation is extrusion die, its 2 front view of lip is as shown in figure 3, adjust
The bolt of edge and lower edge on 2 both ends of extrusion die lip, makes to upwarp along both ends on extrusion die lip 2, lower along curved, lip under both ends
Mouthful 2 middle part aperture W=0.262mm, 2 aperture of lip of the long Y=100mm scopes of 2 both ends side parts of lip, open with close to outer rim
Degree gradually increase, is up to 0.574mm in 2 both ends aperture of lip, obtains the salivation equipment of the Polyamic Acid Film of side thickening
The extrusion die of embodiment 2.
Also the extrusion die of the curve through especially processing on 2 upper and lower edge of lip can be selected, upwarped on lip 2 along both ends, lower edge
Curved under both ends, the aperture of the long Y=100mm scopes of 2 both ends side parts of lip gradually increases with close to outer rim aperture.Root during salivation
According to the requirement of different film thicknesses, different extrusion dies is selected.
The preparation method of this example is other identical with above-mentioned preparation method embodiment 1.
Above-described embodiment, is only further described the purpose of the present invention, technical solution and beneficial effect specific
A example, the present invention are not limited to this.All any modifications made within the scope of disclosure of the invention, equivalent substitution, change
Into etc., it is all contained within protection scope of the present invention.
Claims (5)
1. a kind of salivation equipment for the Polyamic Acid Film that side thickeies, including molding die, carrying salivation shaping polyamic acid
The circulation steel band and hot-air oven of liquid film；The lip aperture of the long Y scopes of two side parts of molding die lip is with close
Outer rim aperture gradually increases, the Y=20~200mm, and aperture is W in the middle part of molding die lip, the molding die lip in the range of Y
Mouth aperture is w, and the maximum of w ＞ W, w are (1.2~3) W, it is characterised in that：
B and B ' points and homonymy lip outer end in plane immediately ahead of the lip on the straight line M vertical with steel band direction of advance
Distance be Y, B and B ' between lip aperture be W, some point and the distance of homonymy lip outer end on lip center line on the outside of B
For y, the lip aperture of the point is w,
W=b1(Y-y)n/109+b2(Y-y)n-1/107+b3(Y-y)n-2/105+b4(Y-y)/103+ W, n be 2~4 integer, 1.5
＞ b10,1.0 ＞ b of ＞2＞ -1.0,1.0 ＞ b3＞ -1.0,0 ＞ b4＞ -1.0, lip aperture are symmetrical with lip longitudinal centre line.
2. the salivation equipment for the Polyamic Acid Film that side according to claim 1 thickeies, it is characterised in that：
Y=60~the 120mm.
3. a kind of preparation method for the Polyamic Acid Film that side thickeies, the polyamic acid solution of synthesis is through molding die in steel band
Upper salivation is shaped to polyamic acid liquid film, is loaded with the steel band of polyamic acid liquid film and becomes the poly- of self-supporting by hot-air oven drying
Amic acid film；When polyamic acid solution salivates, molding die lip bolt is adjusted, makes two avris of molding die lip
The lip aperture of the long Y scopes in part gradually increases with close to outer rim aperture, the Y=20~200mm, in the middle part of molding die lip
Aperture is W, and molding die lip aperture is w in the range of Y, and the maximum of w ＞ W, w is (1.2~3) W, the lip of molding die
Aperture is symmetrical with lip longitudinal centre line, it is characterised in that：
Adjust on molding die lip both ends along bolt, make edge on the lip of the long Y scopes of molding die lip both ends side parts
Outer end upwarps, and lower edge is still horizontal linear；Or edge and lower along bolt is adjusted on molding die lip both ends, make molding die lip
Upwarped on mouthful along both ends, it is lower along curved under both ends；
The air outlet at the top of each plenum chamber in hot-air oven is adjusted, makes the side parts of the horizontal long Z scopes at the top of plenum chamber
Air outlet gradually increases with close to side wall, bore, in the range of the side parts one fixed width of plenum chamber transverse direction, with close to plenum chamber
Madial wall air quantity gradually increases, and the hot wind wind pressure of middle part film surface is F in plenum chamber, the hot wind of two side parts film surfaces
Wind pressure is f, and the maximum of f ＞ F, f are (1.2~3) F.
4. the preparation method for the Polyamic Acid Film that side according to claim 3 thickeies, it is characterised in that：
After self-supporting Polyamic Acid Film is peeled off from steel band, the side parts carry out office in the range of film X=20~200mm
Portion is heated, and side parts film surface heating-up temperature is 150~200 DEG C, and heating time is 8 seconds~80 seconds.
5. the preparation method for the Polyamic Acid Film that side according to claim 3 thickeies, it is characterised in that：
The Z=100mm.
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| CN104497329A (en) | 2015-04-08 |
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