KR20150018277A - Polymer film stretching apparatus - Google Patents

Polymer film stretching apparatus Download PDF

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Publication number
KR20150018277A
KR20150018277A KR1020130094971A KR20130094971A KR20150018277A KR 20150018277 A KR20150018277 A KR 20150018277A KR 1020130094971 A KR1020130094971 A KR 1020130094971A KR 20130094971 A KR20130094971 A KR 20130094971A KR 20150018277 A KR20150018277 A KR 20150018277A
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KR
South Korea
Prior art keywords
polymer film
zone
roll
moving
rolls
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Application number
KR1020130094971A
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Korean (ko)
Inventor
안찬재
최성원
장원석
Original Assignee
삼성전자주식회사
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Application filed by 삼성전자주식회사 filed Critical 삼성전자주식회사
Priority to KR1020130094971A priority Critical patent/KR20150018277A/en
Priority to US14/451,806 priority patent/US20150076719A1/en
Publication of KR20150018277A publication Critical patent/KR20150018277A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/08—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique transverse to the direction of feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C2035/0283—Thermal pretreatment of the plastics material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

A polymer film stretching apparatus according to an embodiment includes a first dryer for attaching a polymer film to a belt, followed by drying and peeling, a method for re-drying a polymer film from the first dryer to reduce a residual amount of a solvent contained in the polymer film 2 dryer, and a stretcher for stretching the polymer film from the second dryer in the width direction of the polymer film.

Description

[0001] POLYMER FILM STRETCHING APPARATUS [0002]

To an apparatus for stretching a polymer film.

With the emergence of flexible display devices, the development of substrates for polymeric materials such as plastics has been actively pursued. Since a substrate must undergo a high temperature process, a polymer material having excellent heat resistance, such as polyimide, is emerging as a strong candidate.

However, since the optical phase retardation is sensitively changed due to external force and deformation due to the external force, it is difficult to keep the retardation value low in the stretching and drying process for producing the film, and the deviation of the retardation value may be relatively large . If the optical phase delay and its deviation are large, the distortion appears in the light, which is not suitable as a substrate for a display device.

And an apparatus for producing a polymer film having a low optical phase delay and a small deviation therefrom.

A polymer film stretching apparatus according to an embodiment includes a first dryer for attaching a polymer film to a belt, followed by drying and peeling, a method for re-drying a polymer film from the first dryer to reduce a residual amount of a solvent contained in the polymer film 2 dryer, and a stretcher for stretching the polymer film from the second dryer in the width direction of the polymer film.

The second dryer may include a first zone including a plurality of first rolls for moving the polymer film, a second zone adjacent to the first zone, and a second zone adjacent to the second zone, And a second zone comprising a plurality of second rolls for the second roll. The polymer film may move in the order of the first zone, the second zone, and the third zone in the second dryer.

The first roll may be arranged in a staggered manner in the first zone and the third roll may be staggered in the third zone.

Wherein the first roll includes a plurality of drive rolls arranged in a vertical direction and rotatable and a plurality of revolving rolls arranged vertically apart from the drive roll in a horizontal direction and staggered in a vertical position with respect to the drive roll, The polymer film may alternately move between the driving roll and the revolving roll and move up and down.

Wherein the driving roll includes a first driving roll and a second driving roll preceding the first driving roll along a moving direction of the polymer film, and the rotational speed of the second driving roll is smaller than that of the first driving roll It may be lower than the rotation speed.

The second zone may comprise a roll movable in the up and down direction and the polymer film may comprise a downwardly extending margin in the second zone and a margin of the polymer film may be provided on the underside of the roll, And can be pressed by the weight of the moving roll, and the moving roll can move up and down according to the length of the spare.

The second zone may further include a sensor for detecting a vertical position of the moving roll.

The minimum distance between the first rolls adjacent to each other in the advancing direction of the polymer film may be 10 cm or less.

The stretching device may further include a third drier for drying the polymer film from the stretching machine to evaporate the solvent.

The stretching apparatus may further include a thickness gauge for measuring a thickness of the polymer film from the stretching machine.

The stretcher may include a tenter.

By doing so, the optical phase delay value and deviation of the polymer film can be reduced.

1 is a schematic front view of a polymer film dryer according to an embodiment.
Figs. 2 and 3 are schematic views for explaining the structure and operation of a roll located in the first zone according to the embodiment. Fig.
Figs. 4 to 7 are schematic views for explaining the operation of the moving roll. Fig.
8 is a schematic view of a polymer film stretching apparatus including a polymer film dryer according to one embodiment.
9 is a schematic view of a primary dryer of a polymeric film stretching device according to one embodiment.

The present invention is not limited to these embodiments, and various changes and modifications will be apparent to those skilled in the art. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

First, a polymer film dryer according to one embodiment will be described in detail with reference to FIG.

FIG. 1 is a schematic front view of a polymer film dryer according to an embodiment, FIGS. 2 and 3 are schematic views for explaining the structure and operation of a roll located in a first zone according to an embodiment, And is a schematic view for explaining the operation of the moving roll.

Referring to FIG. 1, a polymeric film dryer 100 according to one embodiment is divided into a first zone 110, a second zone 120, and a third zone 130, which are sequentially arranged. The polymer film 200 enters the first zone 110 and then passes through the second zone 120 and then out through the third zone 130. The polymer film 200 passes through the polymer film 200 while passing through the dryer 100, Most of the solvent contained in the reaction mixture can be evaporated.

According to one embodiment, the temperature of each zone 110, 120, and 130 may gradually increase from the first zone 110 to the third zone 130 along the traveling direction of the polymer film 200. For example, if the temperature of the first zone 110 is T1, the temperature of the second zone 120 is T2, and the temperature of the third zone 130 is T3, T1? T2? T3 (T1 <T3 ) Can be satisfied. However, the temperature relationship may be different.

According to one embodiment, the temperature in each zone 110, 120, 130 may be constant. For example, the temperature T1 of the first zone 110 is between about 100 ° C and about 150 ° C, the temperature T2 of the second zone 120 is between about 120 ° C and about 160 ° C, 130 may be between about 120 &lt; 0 &gt; C and about 160 &lt; 0 &gt; C. However, the temperatures of the zones 110, 120, and 130 may be different.

By setting several zones along the moving direction of the polymer film 200 and increasing the temperature gradually, it is possible to reduce deformation or distortion of the polymer film 200 during the drying process.

A plurality of rolls 112, 114, 122, 124, 126, and 132 are provided in each of the zones 110, 120, and 130 of the polymer film dryer 100. These rolls 112, 114, 122, 124, 126 and 132 are for moving the polymer film 200.

In the first zone 110, a plurality of rolls 112 and 114 are arranged in a zigzag fashion in the vertical direction. According to one embodiment, the plurality of rolls 112 and 114 may be arranged in two rows in the up-and-down direction, one of the two rows includes a plurality of drive rolls 112, and the other row includes a plurality of revolutions Idle rolls 114, as shown in FIG.

The driving roll 112 is disposed on the side closer to the entrance where the polymer film 200 enters, and the revolving roll 114 is disposed on the far side from the inlet. The positions of the driving roll 112 and the revolving rolls 114 in the vertical direction are shifted from each other and the polymer film 200 starts to move downward and alternately passes between the driving roll 112 and the revolving rolls 114 in the upward direction.

As described above, the plurality of rolls 112 and 114 can be staggered to increase the time during which the polymer film 200 stays in the dryer 100. In this case, the temperature change of the polymer film 200 occurs more slowly, and the deformation of the polymer film 200 can be further reduced.

Referring to Figure 2, according to one embodiment, the diameter R of each roll 112, 114 may be between about 10 cm and about 20 cm. According to one embodiment, the minimum distance D between rolls 112 and 114 adjacent to each other in the advancing direction of the polymer film 200, that is, between the adjacent driving rolls 112 and revolving rolls 114, is about 10 cm &Lt; / RTI &gt; By shortening the distance between the rolls 112 and 114 adjacent to each other in this manner, the polymer film 200 is dried on the side surface, thereby reducing defects such as overlapping.

A plurality of rolls 132 including a driving roll and a revolving roll are arranged in the third zone 130 in a vertical or zigzag manner in the same manner as the first zone 110. The structure, arrangement, etc. of the plurality of rolls 132 may be similar to the first zone 110.

The second zone 120 is provided with a pair of fixed rolls 124 and 126 fixed to the upper portion and a dancer roll or a moving roll 122 which can move up and down. The polymer film 200 extending from the first zone 110 passes through the stationary roll 124 near the first zone 110 and is wound around the lower surface of the moving roll 122 and is fixed near the third zone 130 side. Rolls 126 to the third zone 130. As shown in FIG.

The second zone 120 may also be provided with a detector 250 that senses the position of the moving roll 122.

While the polymer film 200 moves from the first zone 110 to the third zone 130 in this manner, it is possible to receive the tension by the rolls, for example, the driving rolls 112, ) Can be elongated to some extent in the traveling direction. The elongation of the polymer film 200 may vary depending on the magnitude of the tension, and one of the factors affecting the magnitude of the tension is the rotational speed of the driving roll 112.

According to one embodiment, the rotational speed of the driving roll 112 in the first zone 110 is different from each other. For example, when viewed from the advancing direction of the polymer film 200, May be lowered. In this way, the tensile force applied to the polymer film 200 can be lowered by the rotation of the driving roll 112.

For example, referring to FIG. 3, the rotation speed v p of the driving roll (hereinafter, referred to as a "preceding driving roll") 112 p positioned at the front in the moving direction of the polymer film 200 is Let's higher than the driven rolls located on the back forward referred to as "trailing (後行) driving roll"] (112f) than the rotational speed (v f). The portion of the polymer film 200 positioned between the preceding driving roll 112p and the following driving roll 112f can be stretched under tension.

Therefore, by reducing the rotational speed v p of the preceding driving roll 112 p to be smaller than the rotational speed v f of the following driving roll 112 f , the tension applied to the polymer film 200 can be reduced, ) Is reduced.

In the case of the third zone 130, a tension due to the roll 132 may also occur. Also, the polymer film 200 stretched in the first zone 110 or the like having a low temperature can be contracted in the third zone 130 having a high temperature, so that the polymer film 200 can be subjected to compressive stress.

The structure and arrangement of the roll 132 in the third zone 130 is similar to that of the first zone 110 so that the polymer film 200 can be reduced.

According to one embodiment, a plurality of tension detectors (not shown) may be installed in the first zone 110 and / or the third zone 130 to detect the tension applied to the polymer film 200. For example, the tensile sensor can measure the traveling speed of the polymer film 200, and the tensile force applied to the polymer film 200 can be determined from the measured speed.

As such, tensile force is generated in the polymer film 200 in the first zone 110 and the third zone 130, respectively. The tension in the first zone 110 and the tension in the third zone 130 may be the same, but may be different. This difference in tension may cause deformation of the polymer film 200, and in severe cases, the polymer film 200 may be torn.

The second zone 120 can reduce the deformation of the polymer film 200 due to the tension deviation between the first zone 110 and the third zone 130.

The second zone 120 is a gap between the stationary roll 124 located on the first zone 110 and the stationary roll 126 located on the third zone 130 and the remaining portion of the polymer film 200 210). Thus, for example, if the tensile force at the third zone 130 suddenly increases and the speed at which the polymer film 200 exits the third zone 130 is faster than the rate at which the polymer film 200 enters the first zone 110 , The length of the extra portion 210 of the polymer film 200 is reduced to absorb this change.

The moving roll 122 not only applies uniform tension in the direction of movement of the polymer film 200 by its own weight but also uniform tension in the direction perpendicular to the advancing direction, The deviation of the tensile force applied to the excess portion 210 of the polymer film 200 is reduced. Also, since the movable roll 122 can move up and down, it can cope with a change in the length of the spare part 210. [

4, if the shape and weight distribution of the moving roll 122 is uniform, the moving roll 122 presses the excess portion 210 of the polymer film 200 downward with its own weight, The pressing force along the center axis direction of the polymer film 122 or the width direction of the polymer film 200 is uniform. Therefore, the moving roll 122 can reduce the tension deviation in the width direction of the polymer film 200.

5, when the tensile forces from the first zone 110 and the third zone 130 are substantially equal, the polymer film 200 traveling from the first zone 110 to the second zone 120, The velocity v12 of the polymer film 200 traveling in the second zone 120 and the velocity v23 of the polymer film 200 traveling in the third zone 130 may be substantially the same. Therefore, in this case, the length of the extra portion 210 of the polymer film 200 is kept substantially constant, and the position of the moving roll 122 is also constant.

At this time, the tensile force F1 applied to the left portion (hereinafter referred to as "left portion") 212 located on the left side of the moving roll 122 in the spare portion 210 of the polymer film 200, The tension F2 applied to the positioned portion (hereinafter referred to as "right portion") 214 can be kept substantially constant by the balance of the forces. For example, assuming that the polymer film 200 is stationary, the tensile forces F1 and F2 applied to the left portion 212 and the right portion 214 of the polymer film 200 spare portion 210, 122) weight (F0).

Since the tension F1 and F2 applied to the polymer film 200 depend on the weight F0 of the moving roll 122 as described above, the weight F0 of the moving roll 122 is adjusted so that the polymer film 200 It is possible to adjust the applied tension F1 and F2 to a desired value. For example, when the moving roll 122 is heavier, the tensile forces F1 and F2 applied to the polymer film 200 become larger. Conversely, when the moving roll 122 is made lighter, the tensile forces F1 and F2 applied to the polymer film 200, Can be reduced.

It is not easy to change the weight of the moving roll 122 itself. For example, as shown in FIG. 4, tensile forces F1 and F2 of a desired size are obtained by attaching and detaching the weights 123 to both ends of the moving roll 122, Can be obtained. The mass of the weight 123 on both sides of the moving roll 122 may be made different or the weight 123 may be formed on only one side of the moving roll 122 so that the tension deviation in the width direction of the polymer film 200 . A load cell or the like may be attached to both ends of the moving roll 122 to measure the pressing force of the moving roll 122 and to measure the deviation of the tension or the like based thereon.

Referring to FIG. 6, for example, in the third zone 130, the tensile force for pulling the polymer film 200 becomes strong so that the velocity v23 of the polymer film 200 toward the third zone 130 becomes the first zone The length of the excess portion 210 of the polymer film 200 is shortened. Since the movable roll 122 is movable up and down, the movable roll 122 moves upward as the length of the redundant portion 210 is reduced.

If the difference in tension between the first zone 110 and the third zone 130 and the resulting velocity difference v12 and v23 continue, then the excess 210 will continue to be shortened and eventually there will be no excess 210 . Therefore, it is necessary to ensure that the length of the extra portion 210 is equal to or greater than a predetermined minimum value. To this end, it is necessary to eliminate the tension difference in the first region 110 and the third region 130 in a short period of time. One of the major components affecting the tension of the first zone 110 and the third zone 130 is the driving rolls 112 and 132 ), The tension difference can be reduced or eliminated by adjusting the rotation speed.

If the position of the moving roll 122 is sensed by using the detector 250 because the moving roll 122 rises when the length of the excess portion 210 of the polymer film 200 is decreased, the length of the excess portion 210 of the polymer film 200 It is possible to know how much.

Referring to FIG. 7, the movable roll 122 at the reference height Hstd may rise upward when the length of the extra portion 210 becomes short. If the moving roll 122 is higher than the critical height Hth and the length of the excess 210 of the polymer film 200 is too short to cause deformation of the polymer film 200, (Hdet) lower than the threshold value (Hth), the detector (250) can detect the detection height (Hdet).

Referring again to FIG. 6, the detector 250 according to an exemplary embodiment may detect the movement of the moving roll 122 when it reaches the detection height Hdet and generate a corresponding detection signal Sd. The detector 250 may be connected to an external device 300 such as a control device, a display device, or an alarm device so as to transmit a detection signal Sd to the external device 300.

The external device 300 receiving the detection signal Sd may directly control the driving rolls 112 and 132 of the first zone 110 and / or the third zone 130 or may control the situation visually or audibly So as to control the driving rolls 112 and 132.

 Hereinafter, an apparatus for stretching a polymer film including a polymer film dryer according to an embodiment will be described in detail with reference to FIGS. 8 and 9. FIG.

FIG. 8 is a schematic view of a polymer film stretching apparatus including a polymer film dryer according to an embodiment, and FIG. 9 is a schematic diagram of a primary dryer of a polymer film stretching apparatus according to an embodiment.

8, the polymer film stretching apparatus 1 according to an embodiment includes a primary dryer 10, a secondary dryer 20, a stretching machine 30, a thickness meter 40, A car dryer 50 and a winder.

The flexible polymeric film 90 is primarily dried by the primary dryer 10 to maintain the film shape independently and dried by the secondary dryer 20 to largely reduce the amount of the residual solvent, 30, finally dried by the tertiary dryer 50 and wound around the take-up machine 60.

The primary dryer 10 is configured to primarily dry the flexible polymer film to evaporate the solvent to a certain extent to maintain the shape of the film independently. 9, the primary dryer 10 includes a pair of first and second cylindrical pulleys 11 and 12, a belt 13, a film extruder 14, A nozzle 15, a plurality of belt support rolls 16, and a film support roll 17.

Each pulley 11, 12 is substantially cylindrical and rotatable about a rotational axis substantially parallel to the horizontal plane. The two pulleys 11 and 12 are separated from each other, and their rotational axes are substantially parallel to each other. The diameters of the two pulleys 11 and 12 may be substantially equal to each other.

The two pulleys 11 and 12 are coupled by a belt 13 and the belt 13 is movable in accordance with the rotation of the pulleys 11 and 12. [ The portion of the belt 13 located between the two pulleys 11, 12 can be substantially horizontal. The material of the belt 13 may be, for example, stainless steel.

The film extruder 14 can be positioned on the belt 13 near the first pulley 11 and can be extruded on the polymer film 90 and attached on the belt 13. [ An example of the film extruder 14 is a T-die.

The branch nozzles 15 are arranged above and below the belt 13 along the belt 13 and can discharge hot air.

The belt support roll 16 supports the belt 13 so that the belt 13 is not deformed such as sagging.

The film support roll 17 supports the polymer film 90.

The area from the first drier 10 to the second pulley 12 can be divided into three zones Z1, Z2 and Z3 having different temperatures. The temperatures of the zones Z1, Z2 and Z3 can be made higher toward the second pulley 12 from the first pulley 11. That is, the temperature of the first zone Z1 closest to the first pulley 11 is the lowest, the third zone Z3 including the second pulley 12 is the highest, and the temperature of the zone Z2 is It can be in the middle. For example, the temperature of the first zone Z1 is about 50 ° C to about 100 ° C, the temperature of the second zone Z2 is about 70 ° C to about 120 ° C, the temperature of the third zone Z3 is about Lt; 0 &gt; C to about 200 &lt; 0 &gt; C.

The branch nozzles 15 and the belt support roll 16 may be located in these first through third zones Z1, Z2, Z3.

The temperature outside the first to third zones Z1, Z2, Z3 may be approximately room temperature.

The operation of the primary dryer 10 is as follows.

The belt 13 is moved as the first and second pulleys 11 and 12 rotate and the film extruder 14 located in the vicinity of the first pulley 11 moves the flexible polymer film 90 ). Since the polymer film 90 contains a large amount of solvent, it may be difficult to support itself while maintaining the shape of the film.

The polymer film 90 enters the first zone Z1 on the belt 13 and passes through the second zone Z2 and reaches the third zone Z3. In the third zone Z3, the polymer film 90 is turned around the belt 13 along the outer peripheral surface of the second pulley 12 and turned downward. The inverted polymer film 90 starts from the third zone Z3 and then returns to the first zone Z1 through the second zone Z2.

The polymer film 90 is exposed to the hot air sprayed by the branch nozzles 15 arranged above and below the belt 13 while passing through the first to third zones Z1, Z2 and Z3. Then, the polymer film 90 may self-support while the solvent contained in the polymer film 90 evaporates.

The polymer film 90 out of the first zone Z1 moves along the belt 13 along the outer circumferential surface of the first pulley 11. In this process, the polymer film 90 is peeled from the belt 13 and directed toward the film supporting roll 17. The polymer film 90 then goes out of the primary dryer 10 and goes to the secondary dryer 20.

It is difficult to peel off the polymer film 200 from the belt 13 when the solvent of the polymer film 90 is excessively evaporated in the primary dryer 10 and the residual solvent amount is low so that the amount of the residual solvent needs to be maintained at a certain level or more . Therefore, in the primary dryer 10, the polymer film 90 can be dried so that the polymer film 90 maintains the self-supporting property, but the amount of the residual solvent is such that it can be peeled off.

Referring again to FIG. 8, the secondary dryer 20 may have substantially the same structure as that shown in FIG. 1 and may evaporate most of the solvent remaining in the polymer film 90.

The stretching machine 30 can stretch the polymer film 90 in the width direction, and a tenter is an example thereof. The stretching machine 30 can be divided into a plurality of zones having different temperatures.

In the case where the polymer film 90 contains a large amount of solvent when the stretching machine 30 stretches the polymer film 90, the stretching is much increased and the deviation becomes large even when the same force is applied as compared with the case where the solvent is small The in-plane retardation and deviation of the polymer film 90 can be increased. Therefore, in the secondary dryer 20 positioned between the primary dryer 10 and the stretching machine 30, the solvent contained in the polymer film 90 may have a predetermined value, for example, about 10 wt% or less, or about 5 wt% Or less of the solvent. The secondary drier 20 according to the present embodiment can reduce the deformation of the polymer film 90 that may occur during the process while reducing the residual solvent amount by increasing the evaporation amount of the solvent, Can be kept low.

The thickness measuring device 40 can measure the thickness of the polymer film 90 coming from the stretching machine 30. The thickness measuring device 40 can be omitted.

The tertiary dryer 50 includes a plurality of rolls 55, and the stretched polymer film 90 can be finally dried by annealing the polymer film 90 using infrared rays or the like. The annealing temperature may be from about 100 캜 to about 400 캜.

The winder (60) makes the completely dried polymer film (90) in the form of a roll.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

1: Film stretching device
10: Primary dryer
11, 12: pulley
13: Belt
14: extruder
15: branch nozzle
16, 17: Support roll
20: Secondary dryer
30: stretching machine
40: Thickness meter
50: Third Dryer
55: roll
60: Winder
90: polymer film
100: dryer
110, 120, 130: a section of the dryer
112, 114, 122, 124, 126, 132: roll
123: Weights
200: polymer film
210, 212, 214: spare part of polymer film
250: Detector

Claims (11)

A first dryer for attaching the polymer film to the belt, followed by drying and peeling,
A second drier for re-drying the polymer film from the first drier to lower the residual amount of the solvent contained in the polymer film, and
And a stretching machine for stretching the polymer film from the second dryer in the width direction of the polymer film
The polymer film stretching device comprising: The method of claim 1,
The second drier comprises:
A first zone comprising a plurality of first rolls for moving the polymeric film,
A second zone adjacent to the first zone, and
A first zone adjacent to the second zone and including a plurality of second rolls for moving the polymer film,
/ RTI &gt;
The polymer film is moved in the order of the first zone, the second zone, and the third zone in the second dryer
Polymer film stretching device. 3. The method of claim 2,
Wherein the first rolls are arranged in a staggered manner in the first zone,
The third roll is zigzag arranged in the third zone
Polymer film stretching device. 4. The method of claim 3,
Wherein the first roll includes:
A plurality of drive rolls arranged in the vertical direction and rotatable, and
A plurality of revolving rolls arranged vertically apart from the drive roll in the horizontal direction and staggered in vertical positions relative to the drive rolls;
/ RTI &gt;
The polymer film may alternately move between the driving roll and the revolving roll and move in the vertical direction
Polymer film stretching device. 5. The method of claim 4,
The drive roll
A first drive roll, and
And a second driving roll that precedes the first driving roll along a moving direction of the polymer film,
/ RTI &gt;
The rotational speed of the second driving roll is lower than the rotational speed of the first driving roll
Polymer film stretching device. The method according to any one of claims 2 to 5,
Said second zone comprising a moving roll movable in an up and down direction,
Wherein the polymer film includes a margin portion that is drawn down in the second zone,
The excess of the polymer film is pressed by the weight of the moving roll in contact with the underside of the moving roll,
Wherein the moving roll is movable up and down according to the length of the spare portion
Polymer film stretching device. The method of claim 6,
Wherein the second zone further comprises a sensor for sensing a vertical position of the moving roll. The method according to any one of claims 2 to 5,
Wherein a minimum distance between the first rolls adjacent to each other in a moving direction of the polymer film is 10 cm or less. The method according to any one of claims 2 to 5,
And a third dryer for drying the polymer film from the stretching machine to evaporate the solvent. 6. The method according to any one of claims 1 to 5,
And a thickness measuring device for measuring a thickness of the polymer film from the stretching machine. 6. The method according to any one of claims 1 to 5,
Wherein the stretcher comprises a tenter.
KR1020130094971A 2013-08-09 2013-08-09 Polymer film stretching apparatus KR20150018277A (en)

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KR1020130094971A KR20150018277A (en) 2013-08-09 2013-08-09 Polymer film stretching apparatus
US14/451,806 US20150076719A1 (en) 2013-08-09 2014-08-05 Method of manufacturing polymer film and polymer film stretching apparatus therefor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102180608B1 (en) * 2020-05-07 2020-11-18 주식회사 구심이엔지 Apparatus for heat bonding film to lead tab of secondary battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102180608B1 (en) * 2020-05-07 2020-11-18 주식회사 구심이엔지 Apparatus for heat bonding film to lead tab of secondary battery

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