CN109250548A - A kind of winding method of polaroid PVA film - Google Patents
A kind of winding method of polaroid PVA film Download PDFInfo
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- CN109250548A CN109250548A CN201811008325.9A CN201811008325A CN109250548A CN 109250548 A CN109250548 A CN 109250548A CN 201811008325 A CN201811008325 A CN 201811008325A CN 109250548 A CN109250548 A CN 109250548A
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- winding
- rolling
- film
- pva film
- thickness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
Abstract
The present invention provides a kind of winding methods of polaroid PVA film, including being wound by rolling-up mechanism by after the rolling pressure roller of PVA film wait wind；In wrapup procedure, control rolling-up mechanism is moved left and right along center in the horizontal direction, also, is controlled rolling-up mechanism and increased with film roll thickness to the movement of winding direction, keeps film surface on rolling-up mechanism constant at a distance from winding roller surface.Winding method provided by the invention carries out transverse shifting by control rolling-up mechanism, it effectively prevents PVA film and forms repeatedly stacking on film site because of difference in thickness, to weaken the accumulation of difference in thickness to a certain extent, and control rolling-up mechanism is whole to the passage of winding direction, guarantee that film and the winding pressure roller on winding roller mechanism are constantly in metastable position, to realize the stable winding of film.The experimental results showed that the entire wrapup procedure of winding method provided by the invention, problem the defects of PVA film surfacing, non-wrinkle, striped, folding line.
Description
Technical field
The present invention relates to PVA film technical fields, are to be related to a kind of winding of polaroid PVA film more specifically
Method.
Background technique
Polaroid is the important component of liquid crystal display (LCD), is mainly used for the optically-active that control penetrates liquid crystal light
Property.Polaroid be usually by by the iodine of dichroism pigment or dichroic dye oriented attachment in polyvinyl alcohol resin film shape
At light polarizing film be made.With the wide cut increaseization of LCD product, lightening, polaroid is also bigger towards size, thinner
Direction is developed.
But with PVA film wide cut increase, thickness it is thinning after, will appear problems a: side in wrapup procedure
Face, PVA film be difficult to ensure in coating process thickness it is absolute it is uniform (at present product thickness difference largely control in ± 1 μ
Within m), the especially transverse gage of film, in wrapup procedure, the difference of film transverse gage can be with the film coated number of plies
Increase and aggravate, lead to the accumulation of difference in thickness, the difference in thickness finally gradually amplified easily causes film take-up item occur
The defects of line, station track, wrinkle, leads to the quality problems of product.On the other hand, since PVA film is flexible and is easily adhered each other,
Wrinkle are easily generated in conventional winding.Also, the above phenomenon becomes apparent in the winding of the PVA film of slim, big wide cut.
Summary of the invention
In view of this, can effectively be dropped the purpose of the present invention is to provide a kind of winding method of polaroid PVA film
Low PVA film winds the defects of striped occurred, station track, wrinkle, and is suitable for the manufacture of the PVA film of slim, big wide cut.
The present invention provides a kind of winding method of polaroid PVA film, including will be to be wound PVA film it is rolling
After pressure roller, wound by rolling-up mechanism；In wrapup procedure, rolling-up mechanism is controlled in the horizontal direction along center or so
It is mobile, also, control rolling-up mechanism and increase with film roll thickness to the movement of winding direction, make film surface on rolling-up mechanism and receive
The distance of crimped roller surface is constant.
Preferably, the wide cut of the PVA film to be wound is 800mm~5000mm, thick with a thickness of 20 μm~100 μm
Uniformity is spent within ± 2 μm.
Preferably, the winding pressure roller is nip rolls；The diameter of the winding pressure roller is 50mm~500mm.
Preferably, the rate of the winding is 0.3m/min~10m/min, and winding tension is 1Nm~50Nm, monovolume
Film take-up length is 1000m~20000m.
Preferably, the rolling-up mechanism is in the horizontal direction 1mm~10mm along the amplitude that center moves left and right.
Preferably, the rolling-up mechanism is linked along the amplitude that center moves left and right by Thickness measuring instrument in the horizontal direction
Control.
Preferably, the rate that the rolling-up mechanism is moved left and right along center in the horizontal direction be 0.1mm/min~
20mm/min。
Preferably, the rolling-up mechanism increases with film roll thickness to winding direction mobile rate and the film roll
The increased rate of radius is identical.
Preferably, film surface is 1mm~150mm at a distance from winding roller surface on the rolling-up mechanism.
The present invention provides a kind of winding method of polaroid PVA film, including will be to be wound PVA film it is rolling
After pressure roller, wound by rolling-up mechanism；In wrapup procedure, rolling-up mechanism is controlled in the horizontal direction along center or so
It is mobile, also, control rolling-up mechanism and increase with film roll thickness to the movement of winding direction, make film surface on rolling-up mechanism and receive
The distance of crimped roller surface is constant.Compared with prior art, winding method provided by the invention is carried out by control rolling-up mechanism
Transverse shifting effectively prevents PVA film and forms repeatedly stacking on film site because of difference in thickness, thus to a certain degree
The upper accumulation for weakening difference in thickness, and control rolling-up mechanism entirety and elapsed to winding direction, guarantee thin on winding roller mechanism
Film and winding pressure roller are constantly in metastable position, to realize that stablizing for film winds.The experimental results showed that the present invention
The defects of entire wrapup procedure of the winding method of offer, PVA film surfacing, non-wrinkle, striped, folding line problem.
In addition, winding method provided by the invention is suitable for the PVA film of slim, big wide cut, the PVA film wound
Stable uniform can be reached, without bad defect, it is apparently more excellent, and then it is suitable for the manufacture of large-area liquid crystal display.
Detailed description of the invention
Fig. 1 is the PVA film effect picture that the winding method that the embodiment of the present invention 1 provides obtains；
Fig. 2 is the PVA film effect picture that the winding method that the embodiment of the present invention 2 provides obtains；
Fig. 3 is the PVA film effect picture that the winding method that the embodiment of the present invention 3 provides obtains；
Fig. 4 is the PVA film effect picture that the winding method that comparative example 1 provides obtains；
Fig. 5 is the PVA film effect picture that the winding method that comparative example 2 provides obtains.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described, it is clear that institute
The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this hair
The range of bright protection.
The present invention provides a kind of winding method of polaroid PVA film, including will be to be wound PVA film it is rolling
After pressure roller, wound by rolling-up mechanism；In wrapup procedure, rolling-up mechanism is controlled in the horizontal direction along center or so
It is mobile, also, control rolling-up mechanism and increase with film roll thickness to the movement of winding direction, make film surface on rolling-up mechanism and receive
The distance of crimped roller surface is constant.
The present invention is wound after the rolling pressure roller of PVA film wait wind by rolling-up mechanism；The present invention is to described
The equipment of winding is not particularly limited, using PVA coating apparatus well known to those skilled in the art comprising can be realized winding
The rolling-up mechanism of function and winding pressure roller necessary, being arranged in front of the rolling-up mechanism, the present invention do not have special limit to this
System.
In the present invention, the wide cut of the PVA film to be wound is preferably 800mm~5000mm, more preferably
2800mm；The thickness of the PVA film to be wound is preferably 20 μm~100 μm, more preferably 50 μm~70 μm；It is described due-in
The thickness uniformity of the PVA film of volume is preferably within ± 2 μm, and more preferably ± 1 μm.
In the present invention, the winding pressure roller is preferably nip rolls；The nip rolls can guarantee the exhibition of film before winding
Flat effect, it is not specifically limited to this by the present invention.In the present invention, the roller of the winding pressure roller is preferably coat of metal roller
Or rubber-covered drum.In the present invention, the diameter of the winding pressure roller is preferably 50mm~500mm, and more preferably 80mm~
300mm.In the present invention, the diameter of the winding pressure roller is too small, easily forms winding wrinkle.
In the present invention, the rolling-up mechanism is preferably wind-up roll；The rolling-up mechanism can move in the horizontal direction, packet
It includes and carries out transverse shifting (being unable to upper and lower displacement) perpendicular to winding direction, further include being moved along winding direction.
In the present invention, the rate of the winding is preferably 0.3m/min~10m/min, more preferably 2m/min~5m/
min；The winding tension of the winding is preferably 1Nm~50Nm, more preferably 14Nm；The monovolume film of the winding is received
Rolling up length is preferably 1000m~20000m, more preferably 20000m.In the preferred embodiment of the invention, in above-mentioned winding
Under power, the tension bounce in wrapup procedure is less than ± 0.5Nm.
In wrapup procedure, control rolling-up mechanism is moved left and right along center the present invention in the horizontal direction, also, is controlled
Rolling-up mechanism increase with film roll thickness it is mobile to winding direction, make film surface and winding roller surface on rolling-up mechanism away from
From constant.
The present invention controls rolling-up mechanism and moves left and right in the horizontal direction along center.In the present invention, the winder
Structure is preferably in the horizontal direction 1mm~10mm along the amplitude that center moves left and right, more preferably 5mm.
In the present invention, the amplitude that the rolling-up mechanism is moved left and right along center in the horizontal direction is by Thickness measuring instrument
Linkage control.The present invention can be reached by the way that the online Thickness measuring instrument device in film line to be used in conjunction with rolling-up mechanism
Line, which is adjusted, controls the mobile purpose of the rolling-up mechanism.
In the present invention, the rolling-up mechanism is preferably in the horizontal direction 0.1mm/ along the rate that center moves left and right
Min~20mm/min, more preferably 10mm/min.In the present invention, the rolling-up mechanism is in the horizontal direction along a center left side
The process moved right can be carried out continuously also gap progress, to guarantee that film roll is on TD (thin-film width) direction on rolling-up mechanism
Not occurring thickness stacking is advisable.
In the present invention, applicants have found that, transverse shifting is carried out by control rolling-up mechanism, can effectively be avoided
PVA film forms repeatedly stacking because of difference in thickness on film site, to weaken the tired of difference in thickness to a certain extent
Product can be effectively reduced the problem of fold occurs for PVA film.
The present invention controls rolling-up mechanism and increases with film roll thickness to the movement of winding direction, makes film surface on rolling-up mechanism
It is constant at a distance from roller surface with winding.In the present invention, on the rolling-up mechanism film surface and winding roller surface away from
From preferably 1mm~150mm, more preferably 5mm~100mm.
In the present invention, the rolling-up mechanism with film roll thickness increase to the mobile rate in winding direction preferably with it is described
The increased rate of the radius of film roll is identical；It is constantly in relatively surely to guarantee to wind the film on roller mechanism and wind pressure roller
Fixed position.
In the present invention, with the increase of film take-up length, the film on rolling-up mechanism and the winding pressure roller before winding
Relative position necessarily change；Applicants have found that when control rolling-up mechanism is with the increase of winding length, it is whole to
When winding direction passage, it ensure that the film on rolling-up mechanism and winding pressure roller are constantly in metastable position, this is to thin
The winding of stablizing of film has facilitation.
The present invention provides a kind of winding method of polaroid PVA film, including will be to be wound PVA film it is rolling
After pressure roller, wound by rolling-up mechanism；In wrapup procedure, rolling-up mechanism is controlled in the horizontal direction along center or so
It is mobile, also, rolling-up mechanism increases with film roll thickness to the movement of winding direction, presses film surface and winding on rolling-up mechanism
The distance of roller surface is constant.Compared with prior art, winding method provided by the invention is carried out laterally by control rolling-up mechanism
It is mobile, it effectively prevents PVA film and forms repeatedly stacking on film site because of difference in thickness, to subtract to a certain extent
The accumulation of weak difference in thickness, and control that rolling-up mechanism is whole to be elapsed to winding direction, guarantee film on winding roller mechanism with
Winding pressure roller is constantly in metastable position, to realize that stablizing for film winds.The experimental results showed that the present invention provides
The entire wrapup procedure of winding method, problem the defects of PVA film surfacing, non-wrinkle, striped, folding line.
In addition, winding method provided by the invention is suitable for the PVA film of slim, big wide cut, the PVA film wound
Stable uniform can be reached, without bad defect, it is apparently more excellent, and then it is suitable for the manufacture of large-area liquid crystal display.
In order to further illustrate the present invention, it is described in detail below by following embodiment.Following embodiment of the present invention
Equipment used is PVA coating apparatus, including squeezes out feeder apparatus, T-die, mirror surface roller, dry roller group, air-flotation type and dry
Case rolls out rolling-up mechanism etc..
Embodiment 1
By PVA film production line, wide cut is prepared and is 2800mm, is ± 1 with a thickness of 75 μm, film gauge uniformity
μm PVA film；By above-mentioned PVA film after diameter is the winding pressure roller of 250mm, wound by rolling-up mechanism；It is receiving
During volume, rolling-up mechanism transverse shifting (deviating from center or so) within the scope of 5mm is controlled, traversal rate is
10mm/min guarantees the stabilization of winding；Meanwhile windup rate 5m/min, winding tension 14Nm, and rolling-up mechanism with
Film roll moves backward, and the surface of the film on wind-up roll is made to remain at 5mm at a distance from winding roller surface；Film take-up
Overall length 20000m completes the winding of PVA film.
The defects of entire wrapup procedure, PVA film surfacing, non-wrinkle, striped, folding line problem, it is shown in Figure 1.
Embodiment 2
By PVA film production line, wide cut is prepared and is 800mm, is ± 1 μ with a thickness of 20 μm, film gauge uniformity
The PVA film of m；By above-mentioned PVA film after diameter is the winding pressure roller of 50mm, wound by rolling-up mechanism；It is winding
In the process, control rolling-up mechanism transverse shifting (deviating from center or so) within the scope of 5mm, traversal rate is
0.1mm/min guarantees the stabilization of winding；Meanwhile windup rate 2m/min, winding tension 50Nm, and rolling-up mechanism
It is moved backward with film roll, the surface of the film on wind-up roll is made to remain at 50mm at a distance from winding roller surface；Film
Overall length 20000m is wound, the winding of PVA film is completed.
The defects of entire wrapup procedure, PVA film surfacing, non-wrinkle, striped, folding line problem, it is shown in Figure 2.
Embodiment 3
By PVA film production line, be prepared wide cut be 5000mm, be with a thickness of 100 μm, film gauge uniformity ±
2 μm of PVA film；By above-mentioned PVA film after diameter is the winding pressure roller of 500mm, wound by rolling-up mechanism；It is receiving
During volume, rolling-up mechanism transverse shifting (deviating from center or so) within the scope of 10mm is controlled, traversal rate is
20mm/min guarantees the stabilization of winding；Meanwhile windup rate 10m/min, winding tension 1Nm, and rolling-up mechanism with
Film roll moves backward, and the surface of the film on wind-up roll is made to remain at 1mm at a distance from winding roller surface；Film take-up
Overall length 20000m completes the winding of PVA film.
The defects of entire wrapup procedure, PVA film surfacing, non-wrinkle, striped, folding line problem, it is shown in Figure 3.
Comparative example 1
By PVA film production line, wide cut is prepared and is 2800mm, is ± 1 with a thickness of 75 μm, film gauge uniformity
μm PVA film；By above-mentioned PVA film after diameter is the winding pressure roller of 250mm, wound by rolling-up mechanism；It is receiving
During volume, control rolling-up mechanism position immobilizes, and left and right offset does not occur, is wound；Meanwhile windup rate 5m/
Min, winding tension 14Nm, and rolling-up mechanism is moved backward with film roll, makes surface and the winding of the film on wind-up roll
The distance of roller surface remains at 5mm；Film take-up overall length 20000m, completes the winding of PVA film.
Entire wrapup procedure, PVA film early period, winding was stablized, but with the increase of core thickness, and the film in core is thick
Degree difference gradually shows, and the defects of wrinkle occurs in the film eventually led in winding core, shown in Figure 4.
Comparative example 2
By PVA film production line, wide cut is prepared and is 2800mm, is ± 1 with a thickness of 75 μm, film gauge uniformity
μm PVA film；Above-mentioned PVA film is directly passed through rolling-up mechanism to be wound (without winding pressure roller before wind-up roll)；It is winding
In the process, control rolling-up mechanism transverse shifting (deviating from center or so) within the scope of 5mm, traversal rate is
10mm/min guarantees the stabilization of winding；Meanwhile windup rate 5m/min, winding tension 14Nm；Film is directly entered volume
Core winding, film take-up overall length 20000m complete the winding of PVA film.
Entire wrapup procedure is unstable, striped wrinkle easily occurs and introduces film roll, leads to the destruction of product properties, referring to figure
Shown in 5.
The above description of the disclosed embodiments, enables those skilled in the art to implement or use the present invention.It is right
A variety of modifications of these embodiments will be readily apparent to those skilled in the art, and as defined herein one
As principle can realize in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention will
It will not be intended to be limited to the embodiments shown herein, and be to fit to consistent with the principles and novel features disclosed herein
Widest scope.
Claims (9)
1. a kind of winding method of polaroid PVA film, including passing through receipts for after the rolling pressure roller of PVA film wait wind
Volume mechanism is wound；It is characterized in that, control rolling-up mechanism is moved along center or so in the horizontal direction in wrapup procedure
It is dynamic, also, control rolling-up mechanism and increase with film roll thickness to the movement of winding direction, make film surface and winding on rolling-up mechanism
The distance of roller surface is constant.
2. winding method according to claim 1, which is characterized in that the wide cut of the PVA film to be wound is 800mm
~5000mm, with a thickness of 20 μm~100 μm, the thickness uniformity is within ± 2 μm.
3. winding method according to claim 1, which is characterized in that the winding pressure roller is nip rolls；The winding pressure
The diameter of roller is 50mm~500mm.
4. winding method according to claim 1, which is characterized in that the rate of the winding is 0.3m/min~10m/
Min, winding tension are 1Nm~50Nm, and monovolume film take-up length is 1000m~20000m.
5. winding method according to claim 1, which is characterized in that the rolling-up mechanism is in the horizontal direction along center
The amplitude moved left and right is 1mm~10mm.
6. winding method according to claim 4, which is characterized in that the rolling-up mechanism is in the horizontal direction along center
The amplitude moved left and right is by Thickness measuring instrument linkage control.
7. winding method according to claim 1, which is characterized in that the rolling-up mechanism is in the horizontal direction along center
The rate moved left and right is 0.1mm/min~20mm/min.
8. winding method according to claim 1, which is characterized in that the rolling-up mechanism increases with film roll thickness to receipts
It is identical as the increased rate of the radius of the film roll to roll up the mobile rate in direction.
9. winding method according to claim 1, which is characterized in that film surface and winding pressure roller on the rolling-up mechanism
The distance on surface is 1mm~150mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811008325.9A CN109250548B (en) | 2018-08-31 | 2018-08-31 | Method for rolling PVA film for polaroid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811008325.9A CN109250548B (en) | 2018-08-31 | 2018-08-31 | Method for rolling PVA film for polaroid |
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| Publication Number | Publication Date |
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| CN109250548A true CN109250548A (en) | 2019-01-22 |
| CN109250548B CN109250548B (en) | 2021-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811008325.9A Active CN109250548B (en) | 2018-08-31 | 2018-08-31 | Method for rolling PVA film for polaroid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777376A (en) * | 2021-01-19 | 2021-05-11 | 江苏厚生新能源科技有限公司 | Method for reducing rolling deformation of base film main line |
| CN112777375A (en) * | 2021-01-19 | 2021-05-11 | 江苏厚生新能源科技有限公司 | Secondary slitting method for reducing rolling wavy edges |
| CN112794165A (en) * | 2021-01-19 | 2021-05-14 | 江苏厚生新能源科技有限公司 | Method for reducing rolling deformation of main line base film |
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| CN112777376A (en) * | 2021-01-19 | 2021-05-11 | 江苏厚生新能源科技有限公司 | Method for reducing rolling deformation of base film main line |
| CN112777375A (en) * | 2021-01-19 | 2021-05-11 | 江苏厚生新能源科技有限公司 | Secondary slitting method for reducing rolling wavy edges |
| CN112794165A (en) * | 2021-01-19 | 2021-05-14 | 江苏厚生新能源科技有限公司 | Method for reducing rolling deformation of main line base film |
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| Publication number | Publication date |
|---|---|
| CN109250548B (en) | 2021-03-23 |
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