Stretching unit and thin-film manufacturing device

Abstract

To provide a stretching unit and a thin-film manufacturing device, which are excellent in energy efficiency and can be maintained at low cost.SOLUTION: There is provided a stretching unit for stretching a thin-film, in particular a transverse direction orienting device and / or simultaneous stretching unit, including an oven and a heat recovery system (28). The heat recovery system (28) includes a heat exchanger (34) with an exhaust air duct (46) for exhaust air from the oven, a supply air duct (44) for supply air to the oven, a plurality of heat conductors (48), a plurality of heat collectors (50), and a condensate collector (52). The exhaust air duct (46) is open towards the condensate collector (52), the plurality of heat collectors (50) are located in the exhaust air duct (46) with an interstice (68) between the plurality of adjacent heat collectors (50), the plurality of heat conductors (48) are connected thermally to the heat collectors (50), and the interstices (68) are open towards the condensate collector (50). There is also provided a thin-film manufacturing device.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a drawing apparatus and a thin film manufacturing apparatus. [Background technology]

[0002] Thin film manufacturing equipment is known as a machine that usually includes at least one stretching device. The production of thin plastic films in thin film manufacturing equipment requires a high level of energy intensity due to the extremely high temperatures required inside the stretching device's furnace.

[0003] In addition, fresh air must be continuously supplied to the furnace, and at the same time, exhaust air must be discharged from the furnace to replace the supplied air, reducing contamination within the furnace. Various pollutants, especially hydrocarbons, are derived from the thin film passing through the furnace. Furthermore, high heating energy is required for ventilation to heat the fresh air to the appropriate temperature for the furnace.

[0004] It is well known to use thin film manufacturing equipment that uses a heat exchanger for heat recovery. However, when high-temperature air is cooled in the heat exchanger, there is a problem that condensable substances contained in the cooling air in the heating furnace condense on the exhaust side of the surface of the heat exchanger. Therefore, if the heat exchanger is not kept clean, the heat exchange efficiency of the heat exchanger will deteriorate, and cleaning the heat exchanger is a difficult job. Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a drawing apparatus and a thin film manufacturing apparatus that are particularly excellent in energy efficiency and that can be maintained at low cost. [Means for solving the problem]

[0006] The object of the present invention is achieved by a thin film stretching apparatus, particularly a transverse orienter and / or simultaneous stretching apparatus, which includes a heating furnace and a heat recovery device and stretches a thin film. The heat recovery device is provided with an exhaust pipe for discharging exhaust gas from the heating furnace, an air intake pipe for supplying air to the heating furnace, a condensate collector including multiple heat conductors and multiple heat collectors, and a heat exchanger. The air intake pipe and the exhaust pipe are separated from each other by a partition wall, and the heat conductor provided in the exhaust pipe is disposed so as to pass through the partition wall and extend from the exhaust pipe into the air intake pipe, and the exhaust pipe is open to the condensate collector. The collectors are disposed in the exhaust pipe with gaps formed between adjacent collectors, and the heat conductors are heat-conductively connected to the collectors, and the gaps between the collectors are open to the condensate water collector.

[0007] The collectors ensure a high heat exchange efficiency of the heat exchanger. Condensate condensing in the heat exchanger is transported reliably through the condensate collectors, while at the same time leaving the gaps between the collectors open to the condensate collectors. This allows a permanently high efficiency level to be maintained without cleaning or maintenance. For example, each collector is thermally connected to at least one, several or all of the heat conductors. The supply air is in particular fresh air from the environment of the drawing device.

[0008] In this embodiment, the heat radiators function as heat collectors attached to the air intake pipe. The heat exhaust pipe of this embodiment forms the exhaust flow, and the condensate collector is located outside the flow path. In this way, condensate generated in the heat exchanger can be removed along with the exhaust flow.

[0009] A condensate collector is arranged below the exhaust pipe, particularly at least partially below the exhaust flow, to allow for better removal of condensate from the gaps between the collectors. The term "below" within the scope of the present disclosure should be understood to mean corresponding to the assembly position where the heat recovery device is provided. In particular, the term "below" means directly vertically below and does not additionally imply a horizontal offset.

[0010] The exhaust pipe of the present invention may comprise a base having a condensate outlet forming part of at least one condensate collector, so that condensate collecting from the exhaust pipe can be reliably removed from the condensate outlet, e.g., the base may be designed as a condensate level or groove.

[0011] The condensate collector of an embodiment of the present invention reliably collects and specifically disposes of the condensate, allowing the condensate-free receiving shelf to be removed from the condensate collector.

[0012] The heat recovery device includes a condensate drain pipe fluidly connected to a condensate collector via a bent pipe. The heat collector is formed in a plate shape, and the heat conductor has a heat transfer range extended through the heat transfer connected heat collector, thereby further improving the efficiency of the heat exchanger.

[0013] Each heat conductor is connected at right angles via at least one, several, or all of the heat collectors. In an embodiment of the present invention, the heat collectors are arranged parallel to each other and / or to the partition walls to reduce the flow resistance of the exhaust flow in the exhaust pipe. To ensure complete removal of condensate from the condensate collector, the heat conductors can be arranged horizontally or at an angle of 0° to 10°, e.g., 4°, to the horizontal, and the cross section of the heat conductor of the exhaust pipe can be arranged smaller than the cross section of the intake air pipe.

[0014] In an embodiment of the invention, the gap between the collectors has an exhaust flow direction and a condensate flow direction that are parallel to each other, and in particular the exhaust flow direction and the condensate flow direction may be perpendicular or may be offset from the perpendicular at an angle of 0° to 10°. In this way, removal of condensate from the gap between the collectors is assisted by the airflow through the gap.

[0015] The condensate flow direction is, for example, the direction in which the condensate formed on the collector flows unimpeded, excluding the heat conductor. The condensate flow direction is in particular downward. The heat conductor is arranged extending in the region of the collector perpendicular to the air flow direction and / or the condensate flow direction.

[0016] In an embodiment of the present invention, the gap between the collectors has the airflow direction and the condensate flow direction perpendicular to each other, the airflow direction being horizontal, while the condensate flow direction is vertical or offset from the vertical by an angle of 0° to 10°. In this way, the amount of condensate transferred to the environment through the airflow is further reduced. Furthermore, the heat exchange efficiency can be increased by configuring the heat conductor with a heat transfer device, particularly a heat conductor.

[0017] In an embodiment of the invention, the furnace includes an air inlet fluidly connected to the air inlet pipe of the heat exchanger and / or the furnace includes an exhaust port fluidly connected to the exhaust pipe of the heat exchanger, thereby forming a direct and efficient fluid connection circuit between the heat recovery device and the furnace, e.g., the fluid connection is formed by a conduit.

[0018] The heat recovery device may, for example, have a heater blower fluidly connected between an air inlet pipe of the heat exchanger and an air inlet of the furnace, and the heater blower may control the temperature of the air inlet.

[0019] For example, an intake air blower is provided that is arranged between the intake air pipe of the heat exchanger and / or the heating blower and the intake air port of the heating furnace. For example, an exhaust air blower is provided that is arranged downstream of the exhaust pipe of the heat exchanger.

[0020] The object of the present invention is also achieved by a thin film manufacturing apparatus comprising at least one of the above-mentioned stretching devices, one other stretching device, an extrusion device, a casting mill device, a drawing roller device and / or a winding device. The features and advantages described for the stretching device equally apply to the thin film manufacturing apparatus, and vice versa. [Brief explanation of the drawings]

[0021] Other features and advantages of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings, in which: [Figure 1] 1 is a perspective view of a thin film manufacturing apparatus including at least a stretching device according to an embodiment of the present invention; [Figure 2] 2 is an enlarged perspective view of a heat recovery device used in the drawing apparatus of FIG. 1; [Figure 3] 1 is a cross-sectional view of a heat exchanger of a drawing apparatus according to a second embodiment of the present invention; [Figure 4] Side view of the heat exchanger shown in Figure 3; [Figure 5] A perspective view of the heat exchanger shown in Figure 3; [Figure 6] 10 is a diagram showing an airflow in a heat exchanger of a heat recovery device according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] 1 shows a thin film manufacturing system 10 that includes several different thin film stretching and heat recovery devices. The thin film manufacturing system 10 includes an extrusion device 12, a casting mill 14, at least one stretching device 15, such as a machine direction orienter 16 (MDO) or a transverse direction orienter 18 (TDO), a pull-off roller device 20, and a take-up device 22.

[0023] The thin film manufactured by the thin film manufacturing apparatus 10 is, for example, a biaxially oriented thin film such as biaxially oriented polypropylene thin film (BOPP), biaxially oriented polypropylene capacitor thin film (BOPP-C), biaxially oriented polyethylene terephthalate thin film (BOPET), biaxially oriented polyamide thin film (BOPA), biaxially oriented polyethylene thin film (BOPE), or biaxially oriented polylactic acid thin film (BOPLA).

[0024] To produce a thin resin film, a molten resin is extruded from a starting material such as granular material by an extrusion device 12 into a casting and rolling device 14, and the molten resin is poured onto the cooling roll of the casting and rolling device 14 and produced into a thin resin film.

[0025] The resin film is conveyed from the casting roll apparatus 14 to a machine direction orienter 16 where the resin film is stretched in the machine direction to form a stretched film.

[0026] In the machine direction orienter 16, which includes multiple rollers that heat the film to a desired temperature, the film is heated and stretched by the multiple rollers.

[0027] The film, sandwiched between at least two rollers in machine direction orienter 16, is stretched in the machine or drawing direction to form a stretched film.

[0028] The resulting film passes from the machine direction stretcher 16 to a transverse direction orienter 18 where the film is stretched in the transverse direction. The transverse direction orienter 18 includes a furnace 26 having different zones for processing the film along the draw direction of the film production apparatus 10.

[0029] In the first zone, called the preheat zone, the thin film is heated, and in the second zone (the "stretch zone"), the thin film is stretched laterally so that the width of the thin film increases toward the exit of the transport path, but the thickness of the thin film decreases at the end of the second zone.

[0030] After the stretching step, a third and subsequent zones (called "heat treatment zones," "reheat zones," and / or "anneal zones") are provided, e.g., to expose the film to elevated temperatures to relax or remove internal stresses in the film, followed by an additional zone (the "cooling zone") and a final zone where the film is cooled.

[0031] The additional area, called a neutral area, serves to separate the mutual influences between two adjacent areas. For example, a neutral area is an unventilated, empty area. The area of ​​the lateral director 18 can be divided into different areas and / or designed to have different lengths. For example, fewer or shorter neutral areas can be provided, or additional neutral areas can be placed at other points. Other remaining area variations are also possible.

[0032] After the transverse direction orienter 18, the biaxially stretched film is conveyed by a pull-off roller arrangement 20 and wound onto a winder arrangement 22. Alternatively, for example, in addition to the stretcher 15 or the machine direction orienter 16 and / or the transverse direction orienter 18, the film production apparatus 10 can include a co-stretcher 19 having a furnace 26.

[0033] Within the scope of the present invention, stretching apparatus 15 is described herein as a broad concept including a transverse orienter or a co-stretching apparatus or a combination thereof. Stretching apparatus 15, or more specifically furnace 26, requires continuous ventilation of air, particularly a continuous supply of fresh air to replace contaminated exhaust air, between runs. To utilize the waste heat from the exhaust air, stretching apparatus 15 includes heat recovery system 28.

[0034] 2 shows an enlarged perspective view of an example of multiple heat recovery devices 28 provided in the drawing apparatus 15. The heating furnace 26 includes an air inlet 30 and an air outlet 32, both of which are fluidly connected to the heat recovery devices 28. The heat recovery devices 28 include a heat exchanger 34, an air inlet blower 36, an air outlet blower 38, a heating blower 40, piping 42, and a condensate collector 52.

[0035] The heat exchanger 34, which has separate air inlet and outlet pipes 44 and 46, is connected by the air inlet pipe 44 to the air inlet 30 or air outlet 32 ​​of each furnace 26. The air inlet pipe 44 of the heat exchanger 34 is open to the furnace 26 and the heat recovery unit 28. An optional air filter can be provided in the air inlet pipe 44.

[0036] The intake air pipe 44 of the heat exchanger 34 downstream of the intake air inlet 30 is fluidly connected to the intake air blower 36 and the heating blower 40, which are disposed between the intake air inlet 30 and the intake air pipe 44. For example, the intake air blower 36 may be disposed downstream of the heating blower 40, and the heating blower 40 may be disposed between the heat exchanger 34 and the intake air blower 36.

[0037] The heat exchanger 34 is provided between the exhaust blower 38 and the exhaust port 32 of the heating furnace 26, and the exhaust flow of the exhaust pipe 46 of the heat exchanger 34 can be transported to the downstream exhaust port 32 by the exhaust blower 38 provided upstream of the exhaust pipe 46.

[0038] 3 and 4 are a cross-sectional view (perpendicular to the flow directions) and a side view of the heat exchanger 34 of the heat recovery device 28. In addition to the air intake pipe 44 and the exhaust pipe 46, the heat exchanger 34 includes a partition wall 54, a plurality of heat conductors 48, and a plurality of heat collectors 50.

[0039] To clarify the basic structure and operating principles of the heat recovery device 28, several heat conductors 48 and several heat collectors 50 are shown in Figures 3 and 4, but it will be understood that more heat conductors 48 and / or heat collectors 50 may be provided.

[0040] 3 and 4 show the heat exchanger 34 in its assembled position with associated gravity-operated components. The air inlet pipe 44 and exhaust pipe 46 of the heat exchanger 34 are positioned directly adjacent to each other. The air inlet pipe 44 is separated from the exhaust pipe 46 by a bulkhead 54.

[0041] The exhaust pipe 46 is connected to the exhaust flow S A The air intake pipe 44 forms a flow path of the intake air flow S Z The exhaust flow S of the exhaust pipe 46 is formed. A The direction is the intake air flow S of the intake pipe 44. Z The exhaust flow S of the exhaust pipe 46 is in the opposite direction to the direction of the exhaust pipe 46. A The direction is the intake air flow S of the intake pipe 44. Z are parallel to each other in the direction.

[0042] In the first embodiment of the present invention, the exhaust flow S A direction and the intake air flow S of the intake pipe 44 Z The direction is horizontal. The condensate collector 52 is disposed below the exhaust pipe 46, and the exhaust pipe 46 is open to the condensate collector 52. The condensate collector 52 is disposed outside, particularly in the direction of the exhaust flow S A It is located below the flow path.

[0043] At least a portion or all of the condensate collector 52 may be provided in the channel-shaped base 58 of the exhaust pipe 46, allowing the condensate to fall by gravity vertically down at least a portion or all of the exhaust pipe 46, where it may pass through a condensate outlet 56 of the condensate collector 52.

[0044] Condensate collector 52 may include, for example, a receiving shelf 60 additionally provided below condensate outlet 56. A condensate discharge path 62, shown by a dotted line in FIG. 3, is provided in heat recovery device 28, and condensate captured on receiving shelf 60 is discharged from, for example, receiving shelf 60, a bent pipe 64, and condensate discharge path 62, which are fluidly connected to condensate collector 52 shown in FIG.

[0045] The plurality of thermal conductors 48 are constituted by heat transfer devices such as a plurality of heat conductors. The plurality of thermal conductors 48 are disposed so as to penetrate the partition wall 54 and extend from the exhaust pipe 46 into the air intake pipe 44, and therefore the plurality of thermal conductors 48 are provided as part of the air intake pipe 44 and part of the exhaust pipe 46.

[0046] The plurality of thermal conductors 48 are arranged at an angle α of 0° to 10°, for example, 4°, with respect to the horizontal H or the horizontal shown in Fig. 3. Since the plurality of thermal conductors 48 in Fig. 3 are arranged at an upward incline with respect to the air intake pipe 44, the cross section of each thermal conductor 48 in the exhaust pipe 46 is arranged at a lower position than the cross section of the same thermal conductor 48 in the air intake pipe 44.

[0047] In the illustrated embodiment, a plurality of plate-shaped heat collectors 50 are arranged in the exhaust pipe 46. The plurality of heat collectors 50 are arranged parallel to one another, for example, through the partition walls 54. The plurality of heat collectors 50 are arranged not only in the vertical direction V but also in the direction of the exhaust flow S. A The direction or the vertical V is arranged at an angle β between 0° and 10° (Fig. 3).

[0048] The multiple heat collectors 50 are arranged perpendicular to the thermal conductors 48, but the multiple heat collectors 50 are thermally conductively connected to one, multiple, or all of the thermal conductors 48. One, multiple, or all of the thermal conductors 48 are thermally conductively connected, for example, through one heat collector 50. Similarly, each thermal conductor 48 is thermally conductively connected to one, multiple, or all of the thermal collectors 50.

[0049] Like the heat collector 50, only one of the multiple heating elements 66 provided on the air supply pipe 44 is shown in Figure 3 for clarity. The multiple gaps 68 formed between the multiple adjacent heat collectors 50 arranged parallel to each other are arranged in the same direction as the heat collectors 50.

[0050] To accommodate the plurality of heat collectors 50, the plurality of gaps 68 are provided to accommodate the exhaust flow S A The direction of the exhaust flow into the gap 68 is determined by the assigned gap 68. Similarly, the gaps 68 open downward toward the condensate collector 52.

[0051] The gaps 68 provide a flow direction F for condensate solidifying from exhaust air contacting the heat collectors 50. The flow direction F of the condensate is, for example, downward and has a downward falling component mainly due to gravity. The gaps 68 are formed in the vertical direction V or at an angle β to the vertical direction V, similar to the heat collectors 50. In the example of FIG. 3 , the thermal conductor 48 is arranged perpendicular or perpendicular to the flow direction F of the condensate.

[0052] In the embodiment shown in FIG. 3, the flow direction F of the condensate is parallel to the exhaust flow S A The direction is perpendicular to the direction of the exhaust pipe 46. During operation of the thin-film production apparatus 10, the stretching device 15, and the heat recovery device 28, hot air is transported by the exhaust fan 38 from the heating furnace 26 through the exhaust pipe 46 to the exhaust port 32. For example, hydrocarbons that rapidly condense when the hot air passing through the exhaust pipe 46 is cooled are contained in the exhaust gas passing through the exhaust pipe 46.

[0053] The warm exhaust gas flows through the exhaust pipe 46 of the heat exchanger 34 to the exhaust flow S A The exhaust air flows in the direction of the exhaust pipe 46 and contacts the heat collector 50 and the thermal conductor 48. Therefore, the exhaust air flowing through the exhaust pipe 46 transfers heat to the heat collector 50, which is cooler than the exhaust air flow and the thermal conductor 48, and the exhaust air flowing through the exhaust pipe 46 heats the environment of the drawing apparatus 15 through the exhaust blower 38.

[0054] Therefore, the heat of the exhaust air flow is transferred to the air intake pipe 44 through the heat collector 50 and the thermal conductor 48. The intake air, particularly fresh air, delivered by the intake air blower 36 flows through the air intake pipe 44 into the furnace 26.

[0055] The intake air flow in the intake pipe 44 is heated by contact with the thermal conductor 48 and the heating element 66, which are at a higher temperature than the intake air flow, so that the intake air flow passing through the heated blower 40 is heated to the temperature required for the furnace 26 before flowing into the furnace 26 through the intake air port 30 and the intake pipe 44. As described above, the exhaust air flow in the exhaust pipe 46 is cooled by the heat collector 50. Hydrocarbons in the air condensate generated by cooling the exhaust air flow by the heat collector 50 come into contact with the heat collector 50 and the thermal conductor 48 and condense into liquid.

[0056] Without any obstruction except for the lateral heat conductor 48, the condensate flows downward in the flow direction F due to the heat collector 50 and the gap 68. When the condensate reaches the lower end of the heat collector 50, it drains or flows out of the heat collector 50 and is collected by the condensate collector 52, so that the condensate is discharged through the condensation passage 62.

[0057] Since condensate can be reliably discharged from the exhaust pipe 46, particularly the gap 68, without remaining inside, clogging of the heat recovery device 28 with condensate does not occur. Also, the heat exchanger 34 has the advantage of having extremely good heat exchange efficiency and not requiring additional, complicated maintenance equipment. The heat recovery device 28 operates at extremely high efficiency while at the same time requiring low maintenance costs.

[0058] 5 and 6 show a second embodiment of the heat recovery device 28, the stretching device 15, and the thin-film manufacturing apparatus 10. Since the second embodiment substantially corresponds to the first embodiment, in the second embodiment, the same parts as those in the first embodiment are given the same reference numerals, and only the different parts will be described. FIG. 5 shows a perspective view of the second embodiment of the heat exchanger 34.

[0059] The receiving shelf 60 of the condensate collector 52 of the second embodiment can be removed from below the exhaust pipe 46. In this case, if there is no need to provide a dedicated condensation path 62, the receiving shelf 60 can be removed immediately.

[0060] 5 is provided in the base 58 of the exhaust pipe 46. For example, the condensate outlet 56 is provided at the downstream edge of the base 58 of the exhaust pipe 46, so that the exhaust flow S AThe condensate accumulating in the base is transported to a condensate outlet 56. Figure 6 shows a third embodiment of the heat recovery device 28.

[0061] In the third embodiment, the exhaust flow S A or intake air flow S Z The direction of the exhaust flow S is not horizontal, but vertical toward the heat collector 50 and the heat conductor 48. Below the heat collector 50 and the heat conductor 48, the exhaust pipe 46 is horizontally disposed and / or offset relative to the heat exchanger 34, so that the exhaust flow S A and intake air flow S Z The direction of the beam is also deflected (as shown by the arrow in FIG. 6).

[0062] Below the side of the flow path that is deflected is a condensate collector 52. The condensate collector 52 of the type described in the embodiment of Figure 3 can be used in the third embodiment of Figure 6b.

[0063] The structure of the heat collector 50 and the heat conductor 48 of the air intake pipe 44 corresponds to that of the first embodiment, so that the gap 68 is open to the condensate collector 52. In this embodiment, the exhaust flow S A and the direction of condensate flow F are parallel to each other within the area of ​​the heat collector 50.

[0064] Exhaust flow S A The direction of the exhaust gas flow S and the flow direction F of the condensate are perpendicular to the vertical V or have an angle β of 0° to 10° as shown in the figure with respect to the vertical V. In this embodiment, the exhaust gas flow S A The direction of the flow of condensate F is parallel to the direction of the flow of condensate from the gap 68, improving the removal of condensate from the gap 68.

[0065] The present invention allows for different features of the various embodiments to be combined with one another, particularly the use of removable receiving shelves 60 and condensate drains 62 and / or the location of condensate outlet 56 on base 58.

Claims

1. A thin film stretching apparatus including a heating furnace (26) and a heat recovery device (28), The heat recovery system (28) includes a condensate collector (52), a heat exchanger (34) having an exhaust pipe (46) for discharging air from the furnace (26), an air supply pipe (44) for supplying air to the furnace (26), a plurality of heat conductors (48), and a plurality of heat collectors (50); The air intake pipe (44) and the exhaust pipe (46) are separated from each other by a partition wall (54), and a plurality of heat conductors (48) disposed in the exhaust pipe (46) are disposed so as to extend from the exhaust pipe (46) into the air intake pipe (44) through the partition wall (54); The exhaust pipe (46) opens into a condensate collector (52); A thin film stretching apparatus, characterized in that a plurality of adjacent heat collectors (50) are disposed within an exhaust pipe (46), the exhaust pipe (46) having gaps (68) formed between the adjacent heat collectors (50), a heat conductor (48) is heat conductively connected to the heat collectors (50), and the gaps (68) formed between the heat collectors (50) are open to a condensate collector (52).

2. The exhaust pipe (46) is A ), and the condensate collector (52) is configured to receive the exhaust gas flow (S A 2. The thin film stretching apparatus according to claim 1, wherein the thin film stretching apparatus is disposed outside the apparatus.

3. 2. The thin film drawing apparatus of claim 1, wherein a condensate collector (52) is provided in at least a portion of the exhaust pipe (46).

4. The condensate collector (52) is configured to collect the exhaust gas (S A 2. The thin film stretching apparatus according to claim 1, wherein the thin film stretching apparatus is provided in at least a part of the first and second stretching units.

5. 2. The thin film drawing apparatus of claim 1, wherein the exhaust pipe (46) has a condensate outlet (56) that forms part of the condensate collector (52).

6. 2. The thin film drawing apparatus of claim 1, wherein the condensate collector (52) comprises a receiving shelf (60).

7. 2. The thin film drawing apparatus of claim 1, wherein the heat recovery system (28) comprises a condensate drain (62) fluidly connected to the condensate collector (52).

8. 2. The thin film stretching apparatus according to claim 1, wherein the heat collector (50) through which the heat conductor (48) passes is formed in a plate shape.

9. 2. The thin film stretching apparatus according to claim 1, wherein the plurality of heat collectors (50) are arranged parallel to each other and / or parallel to the partitions (54).

10. 2. A thin film drawing apparatus according to claim 1, wherein the heat conductor (48) is arranged horizontally (H) or at an angle (α) between 0° and 10° to the horizontal (H).

11. 11. The thin film stretching apparatus according to claim 10, wherein the cross-sectional position of the heat conductor (48) of the exhaust pipe (46) is located at a lower position than the cross-sectional position of the air intake pipe (44).

12. The gaps (68) formed between the collectors (50) allow the exhaust gas flow (S A ) direction and exhaust flow (S A 2. The thin film stretching apparatus according to claim 1, wherein the direction of flow of the condensate (F) is parallel to the direction of the condensate (A) and the direction of the condensate (B).

13. Exhaust flow (S A 13. The thin film stretching apparatus according to claim 12, wherein the direction of the flow (F) of the condensate is perpendicular (V) or forms an angle between 0° and 10° with respect to the perpendicular (V).

14. The gaps (68) formed between the adjacent collectors (50) allow the exhaust gas flow (S A ) direction and exhaust flow (S A 2. The thin film drawing apparatus according to claim 1, wherein the condensate flows in a direction perpendicular to the direction of the condensate flow.

15. Exhaust flow (S A 15. The thin film stretching apparatus according to claim 14, wherein the direction of the flow of the condensate (F) is horizontal and the direction of the flow of the condensate (F) is vertical (V) or at an angle (β) between 0° and 10° with respect to the vertical (V).

16. 2. The thin film drawing apparatus of claim 1, wherein the thermal conductor (48) is a heat transfer device.

17. 2. The thin film stretching apparatus of claim 1, wherein the furnace comprises an air inlet port (30) fluidly connected to the air inlet pipe (44) of the heat exchanger (34) and / or the furnace comprises an exhaust port (32) fluidly connected to the exhaust pipe (46) of the heat exchanger (34).

18. 2. The thin film drawing apparatus of claim 1, wherein the heat recovery device (28) comprises a heated air blower (40).

19. 20. The thin film drawing apparatus of claim 18, wherein the heated air blower (40) is fluidly connected between the supply air pipe (44) of the heat exchanger (34) and the air inlet (30) of the furnace (26).

20. 10. A thin film manufacturing apparatus comprising at least one thin film stretching device (15) according to claim 1, characterized in that in addition to the thin film stretching device (15), the apparatus further comprises an extrusion device (12), a casting rolling device (14), a drawing roller device (20) and / or a winder (22).

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