JP2002144420A - Tenter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To upgrade the thermal efficiency with regard to a tenter internally structuted like a box, with such a function that a sheet-like object in the process of conveyance is grasped from both sides and stretched in the crosswise direction by applying tension sideways. SOLUTION: This tenter comprises an air supply passage 351 for supplying fresh air into a box 30, an air evacuation passage 352 for evacuating the air from the box 30, a heat exchanger 353 equipped with a thermal accumulative matrix 3531 which rotates traversing both air evacuation passage 352 and air supply passage 351 and has a linear air ventilation passage 3531a and a blow-off nozzle 3542 which blows off a compressed fluid to the air ventilation passage 3531a of the thermal accumulative matrix 3531.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tenter which stretches a sheet material in the lateral direction by gripping the sheet material being conveyed from both sides and applying a tension in the lateral direction.

[0002]

2. Description of the Related Art In order to fix the molecular orientation of a sheet stretched in the transverse direction and to anneal the sheet, the sheet is heated in a tenter to a temperature near the softening point of the sheet, and then the sheet is heated in the tenter. Often, rapid cooling is performed in a low temperature part. At this time, if the sheet is a material containing a sublimate such as an oligomer, the sublimate is released from the sheet heated to near the softening point, and the released sublimate is placed in a place with a low temperature. Precipitates.

When the deposited sublimate adheres to the sheet-like material, it causes a product defect. For this reason, conventionally, the air in the tenter from which the sublimate has been released is exhausted to the outside of the tenter and discarded before the portion where the sheet is rapidly cooled, while keeping the air at a high temperature, thereby removing the sublimate.

[0004]

However, exhausting the air, which has once been heated to a high temperature, out of the tenter and discarding it, remarkably deteriorates the heat efficiency of the tenter, increases the energy, and increases the sheet-like material. This hinders manufacturing cost reduction.

[0005] In view of the above circumstances, an object of the present invention is to provide a tenter with good thermal efficiency.

[0006]

A tenter according to the present invention, which achieves the above object, stretches the sheet in the transverse direction by gripping the sheet during transport from both sides and applying tension in the transverse direction. In a tenter having a box inside, an air supply path for supplying air to the box, an exhaust path for exhausting air in the box, and both the exhaust path and the air supply path A heat exchanger having a heat storage matrix having an air flow passage rotating across the heat storage matrix, wherein a compressed fluid is blown into the air flow passage of the heat storage matrix.

The tenter of the present invention has much higher thermal efficiency than the conventional tenter in which the air in the tenter is exhausted out of the tenter at a high temperature and is discarded, since the heat exchanger is provided with the heat exchanger. Moreover, in the tenter of the present invention, even in the case where a sheet made of a thermoplastic resin that releases a sublimate such as an oligomer is stretched in the lateral direction, the heat exchanger includes a heat storage matrix having an air flow passage. It is a so-called rotary heat exchanger provided with a compressed fluid that is blown into the air flow passage of the heat storage matrix. Can be blown out of the exchanger,
Blockage by the sublimate can be prevented, and reliable heat recovery by the heat exchanger can be performed. When the air flow path is straight, the sublimate is more easily blown out to the outside.

In the tenter of the present invention, it is preferable that the box is provided with a catalyst for decomposing and removing sublimates generated from the thermoplastic resin.

In the above aspect, since the sublimate released into the air in the tenter is decomposed and removed by the catalyst, it is possible to reduce the deposition of the sublimate on the heat storage matrix of the heat exchanger. Since the heat exchanger can perform more reliable heat recovery, the heat efficiency of the tenter can be more reliably improved.

[0010] In the tenter according to the present invention provided with the catalyst, the box body includes a plurality of sections arranged in the conveying direction of the sheet-like material, and the air supply path includes a part of the plurality of sections. A mode in which fresh air after passing through the heat exchanger is distributed to a plurality of sections, and the exhaust path is configured to collect air from the plurality of sections and send the air to the heat exchanger. Is preferred.

[0011] Among the plurality of sections of the tenter, the section from which the sheet is heated to near the softening point, that is, the section from which the sublimate is released, that is, the air from which the sublimate is released is problematic. Therefore, it may be a tenter for recovering the heat of the air in all the sections by the heat exchanger.However, such a tenter complicates the piping and leads to an increase in the cost of the apparatus. It is preferable that the heat exchange is performed only in the minimum required part of the plurality of sections.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an entire sheet manufacturing apparatus for manufacturing a sheet made of polyester which is a thermoplastic resin as a support of a photographic film will be described with reference to FIGS. This will be described below with reference to FIG.

FIG. 1 is a diagram for explaining a first half of a sheet-like material manufacturing apparatus, and FIG. 2 is a diagram for explaining a second half of a sheet-like material manufacturing apparatus.

The sheet-like article manufacturing apparatus 1 cools a molten thermoplastic resin into a sheet while casting it into a sheet, and then stretches the sheet in the longitudinal direction. A casting apparatus 10 for continuously producing a photographic film support by stretching in the machine direction, comprising: a casting apparatus 10 for casting a thermoplastic resin in a molten state into a sheet form; And a tenter 30 for stretching in the horizontal direction, and a winding device 40 for winding the manufactured support into a roll. Further, at the time of starting the apparatus, the sheet-like material manufacturing apparatus 1 gradually adjusts and stabilizes the manufacturing conditions from the upstream apparatus, and finally passes the sheet-like material to the winding device 40. Therefore, at the exit side of each of the casting device 10, the longitudinal stretching device 20, and the tenter 30, unsatisfactory products are collected that are transported until the respective devices are adjusted to the production conditions and stabilized. A recovery device (not shown) for performing the operation is provided. In addition, these recovery devices are operated even when the devices are prepared for some reason and the products are insufficient for some reason after the devices have been adjusted to the manufacturing conditions and moved to the manufacturing stage.

[0015] In the production of the sheet-like material, first, virgin pellets obtained by polymerizing terephthalic acid and ethylene glycol into pellets, and recycled raw materials obtained by recycling the materials recovered by each recovery device are separately dried. After that, the mixture is heated in a state where both are mixed to obtain a thermoplastic resin in a molten state.

The casting apparatus 10 includes a die 11 and a rotating drum 1.
2 is provided. The die 11 has a slit-shaped lip for discharging the molten thermoplastic resin, and is provided above the rotating drum 12. The molten thermoplastic resin obtained by heating the virgin pellets and the recycled material in a mixed state is continuously discharged from the lip portion of the die 11 to the peripheral surface of the rotary drum 12. The thermoplastic resin discharged onto the peripheral surface of the rotary drum 12 is substantially 3 /
Until four rotations are made, the outer peripheral surface of the rotating drum 12 is water-cooled, and the outer peripheral surface of the rotating drum 12 is rapidly cooled by being blown with air from the outer peripheral surface and air-cooled. It becomes an oriented sheet.

FIG. 2 shows a state in which the manufactured support is wound by a winding device 40, and FIG.
In FIG. 2 and FIG. 2, the path from the molten thermoplastic resin discharged from the lip of the die 11 to the winding device 40 serving as a support is indicated by a dashed line, and the path is not in the middle of the path. The path collected by the illustrated collecting device is indicated by a two-dot chain line.

The sheet formed by the casting apparatus 10 is
Next, it is conveyed to the longitudinal stretching device 20 shown in FIG.

The longitudinal stretching device 20 is provided with a plurality of rotating rolls 21 arranged between the entrance and the exit so that the conveyed sheet material is wound around at a predetermined wrap angle. In addition, each of the plurality of rotating rolls 21
Each is adjusted to a predetermined temperature. The conveyed sheet material is conveyed toward the outlet while being heated or cooled by these rotating rolls 21. These rotating rolls 21 include a plurality of preheating rotating rolls 21a for heating the sheet-like material before stretching, and a plurality of stretching rotating rolls 21 for stretching the sheet-like material in the longitudinal direction while heating the sheet-like material.
b and a plurality of cooling rotating rolls 21c for cooling the sheet-like material stretched in the longitudinal direction. The longitudinal stretching of the sheet-like material in the longitudinal stretching device 20 is performed by setting the rotation speed of the rotation stretching roll on the outlet side of the plurality of stretching rotating rolls 21b to be higher than the rotation speed of the rotating stretching roll on the entrance side. This is performed by passing a sheet-like material in a state where the sheet-like material has passed.

The sheet-like material stretched in the longitudinal direction by the longitudinal stretching device 20 is then conveyed to a tenter 30 shown separately in FIGS.

The tenter 30 has a plurality of sections each adjusted to a predetermined temperature (FIG. 1 shows an upstream section among the plurality of sections, and FIG.
Represents a downstream section of the plurality of sections, and sections in the middle are not shown. ). These sections are arranged in order from the upstream side, a preheating zone, a stretching zone,
A plurality is assigned to each of the heat setting zone, the thermal relaxation zone, and the cooling zone. In addition, clips gripping both sides of the sheet-like object from both sides of the sheet-like object run in each section toward the downstream side. The sheet-like object passes through each section with both sides gripped by the clip. First, in the preheating zone, the sheet-like material being conveyed is heated, and in the stretching zone, the clip is conveyed while applying tension to the sheet-like material in the transverse direction in an atmosphere at a higher temperature than the preheating zone. The sheet is stretched in the transverse direction. In the heat setting zone, the molecular orientation of the sheet is fixed in an atmosphere at a higher temperature than the stretching zone. In the thermal relaxation zone, the sheet is annealed, and in the cooling zone, the sheet is rapidly cooled. The sheet-like material exiting from the last section on the downstream side is a sheet-like material in which both sides held by clips of the tenter are removed according to the path shown by the dotted line in FIG. Is transported toward the winding device 40 as a support to be manufactured by the sheet-like material manufacturing apparatus.

Then, in order to allow the support to be accurately wound on the winding device 40, the support conveyed up to immediately before the winding device 40 is controlled in the horizontal position and the winding device 4 is rotated.
After being adjusted in tension at the time of winding to zero, it is wound up in a roll shape by the winding device 40.

Here, the tenter 30 shown separately in FIGS. 1 and 2 in the sheet manufacturing apparatus shown in FIGS. 1 and 2 corresponds to one embodiment of the tenter of the present invention. Before describing in detail the characteristic parts of the tenter, tenter 3
The tenter 30 will be described in detail with reference to FIG.

FIG. 3 is a perspective view of the tenter.

The tenter 30 is provided on both sides of the entrance 31 into which the sheet is fed, the exit 32 through which the sheet is fed, and both sides of the sheet fed from the entrance.
And a chain 33 provided between the inlet and the outlet as part of the configuration. In FIG. 3, the sheet-like object is represented by a dashed line.

The box 33 is a long rectangular cylindrical body formed by connecting a plurality of sections each adjusted to a predetermined temperature. The plurality of sections are assigned to the preheating zone 30a, the stretching zone 30b, the heat fixing zone 30c, the heat relaxation zone 30d, and the cooling zone 30f in order from the entrance 31 side. Further, although omitted in the description of the tenter in the sheet-like material manufacturing apparatus described above, the tenter 30 is provided with a neutral zone 30e between the heat relaxation zone 30d and the cooling zone 30f. The neutral zone 30e includes a heat relaxation zone 30d and a cooling zone 30d.
Since the temperature difference from f is large, this zone has a function of shutting off heat between both zones.

The two chains 34 circulate in the respective sections between the inlet 31 and the outlet 32 (see arrows in the figure). The interval is the outlet 3 in the preheating zone 30a.
At the end of the stretching zone 30b, three to four times the distance between the two chains 34 at the inlet 31 at the end of the stretching zone 30b. It is arranged so that it spreads to the extent of about. Further, both the chains 34 are in the zone after the heat fixing zone 30c.
The intervals spread from about twice to four times are arranged at slightly narrower intervals. In addition, a number of clips (not shown) are connected to each of the two chains 34. These clips grip both sides of the sheet-like material to be sent in at the inlet section 31 and move toward the outlet section 32 with the circulation of the chain 34 with the both sides held.
The sheet-like object gripped on both sides by these clips passes through each section toward the outlet 32. Therefore, the clips connected to each chain 34 are connected to the entrance 3
From 1 to the end of the stretching zone 30b, they move so as to be apart from each other, and the sheet is stretched to a width of about 3 to 4 times the width in the horizontal direction when fed into the inlet 31. .

In each section, a part of the air in each section is once collected, adjusted to a predetermined temperature, and then blown onto a sheet passing through the temperature-adjusted air.
The sheet is heated from the preheating zone 30a to the heat relaxation zone 30d, and is cooled in the cooling zone 30f. The heat setting zone 30c and the heat relaxation zone 30
In d, the sheet is heated to near the softening point of the sheet.

The sheet-like material exiting the box 33 is sliced on both sides gripped by clips. At the outlet 32, the gripping of the clip holding both sides of the sheet is released, and the central portion of the sheet remaining after the sides are sliced is sent out as a product. Note that the sliced side portions of the sheet-like material are collected by a collecting device (see a path indicated by a dotted line in FIG. 2).

Next, the characteristic portion of the tenter according to the first embodiment of the present invention will be described.

The tenter 30 has a heat exchange device.

FIG. 4 is a schematic view of the tenter according to the first embodiment.

The heat exchange device 35 provided in the tenter 30
Is provided with an air supply path 351, an exhaust path 352, a heat exchanger 353, and a cleaning pipe 354 shown in FIG. 5 for blowing air to the exhaust side of the heat exchanger. The heat exchanger 353 and the cleaning pipe 354 will be described later, and the air supply path 351 and the exhaust path 352 will be described here.
As described in the description of the tenter 30 with reference to FIG. 3, since the sheet-like material in the heat fixing zone 30c and the thermal relaxation zone 30d is heated to near the softening point, the sheet-like material made of the thermoplastic resin is not heated. The oligomer is released as a sublimate in each section of the fixed zone 30c and the thermal relaxation zone 30d. Therefore, the exhaust path 352 is connected to the heat fixing zone 3
0c and each section of the heat relaxation zone 30d, collects air in each section of the heat fixing zone 30c and the heat relaxation zone 30d, sends the air to the heat exchanger 353, and sends the air passing through the heat exchanger 353 outside the tenter 30. It exhausts to the side. The air supply path 351 is also connected to each section of the heat fixing zone 30c and the heat relaxation zone 30d. This air supply path 351
Is a heat setting zone 30 obtained from outside the tenter 30.
c and the fresh air having a lower temperature than the air in each section of the heat relaxation zone 30 d is sent to the heat exchanger 353,
After passing through 3, fresh air is distributed to each section.

Next, the heat exchange device 35 will be described in more detail with reference to FIGS.

FIG. 5 is a partially cutaway front view of the heat exchanger provided in the tenter of the first embodiment, and FIG. 6 is a configuration diagram of the heat exchanger. The arrows shown in FIGS. 5 and 6 indicate the flow of the air, and as shown in FIG. 6, the direction of the air flowing in the air supply passage 351 and the exhaust passage 35
The directions of the air flowing inside 2 are opposite to each other.

The heat exchanger 353 includes a heat storage matrix 35.
31; a motor 3532 shown in FIG. 6; and a partition seal 3533 shown in FIG. This heat exchanger 353 is a so-called rotary type,
32 rotates the heat storage matrix 3531 about the rotation axis X. Thermal storage matrix 3531
Is circular and has a plurality of linear air passages 3531a extending in the extending direction of the rotation axis X over the entire surface. Therefore, the straight air flow passage 3
The flow of air passing through 531a is laminar, and oligomers are unlikely to be deposited in air passage 3531a. In addition, the partition seal 3533 divides the rotating circular heat storage matrix 3531 into an exhaust side and an air supply side by just a half circle. In FIG. 5, the semicircle located on the left side of the partition seal 3533 is on the exhaust side, and the semicircle located on the right side is on the air supply side. In FIG. 6, the upper part of the heat storage matrix 3531 is located on the exhaust side,
The lower part is the air supply side. Partition seal 353
Numeral 3 is for preventing air on the exhaust side of the heat storage matrix 3531 from leaking to the air supply side of the heat storage matrix 3531. On the exhaust side of the heat storage matrix 3531, the heat fixing zone 30c and the heat relaxation zone 30d
The heat is recovered from the high-temperature air sent from each section of the heat storage matrix 3531, and the tenter 3 is provided on the air supply side of the heat storage matrix 3531.
The heat recovered on the exhaust side is transmitted to the fresh air obtained from the outside of the air outlet. As shown in FIG. 6, on the downstream side of the heat exchanger 353 in the air supply passage 351, an after heater 91 is provided.
Is provided. The fresh air warmed by the heat storage matrix 3531 is further heated by the after-heater 91 to a temperature suitable for being supplied to each section of the heat fixing zone 30c and the heat relaxation zone 30d.

The cleaning pipe 354 comprises three pipes 3541 shown in FIG. 5, a number of spray nozzles 3542 also shown in FIG. 5, and two pressure sensors 3 shown in FIG.
543 and a control unit 3544 also shown in FIG. The three pipes 3541 are provided on the exhaust side of the heat storage matrix 3531, in the rotation direction of the heat storage matrix 3531, and on the tenter 30 side with respect to the heat storage matrix 3531, and have a predetermined radius of the circular heat storage matrix 3531. Each is extended in a direction parallel to the direction. Each of these three pipes 3541
It is connected to three solenoid valves 93 connected to the air tank shown in FIG. A number of spray nozzles 3542
Each of the three pipes 3541 has a pipe 354.
1 are arranged side by side at equal intervals along the axial direction.
Each of the large number of blowing nozzles 3542 opens toward the heat storage matrix 3531, and compressed air supplied from the air tank is blown out of each of the large number of blowing nozzles 3542. In addition, three pipes 35
41 are arranged so as to be shifted from the adjacent pipe 3541 in the extending direction. For this reason, the compressed air is blown to all the plurality of air flow passages 3531a provided in the portion of the rotating heat storage matrix 3531 that passes through the three pipes 3541, and the side of the heat storage matrix 3531 where the pipe 3541 is provided. Oligomers precipitated on the surface of the air flow passage 3531a,
The air flow passage 3531a passes through the air flow passage 3531a.
Is blown out to the outside. Accordingly, the air oligomer 3531a is prevented from being blocked by the precipitated oligomer, and the heat exchanger 353 can reliably recover heat. Here, the compressed air is preferably heated air from the viewpoint of preventing oligomer precipitation. If the compressed air is moist air, it is difficult to blow out the precipitated oligomers. Therefore, the compressed air is more preferably dry air. As shown in FIG. 6, a filter 92 is provided on the air supply passage 351 downstream of the heat exchanger 353. This filter 9
No. 2 is for removing the oligomer mixed in the fresh air. When there is an oligomer that cannot be removed by the cleaning pipe 354 in the air flow passage 3531a, the air flow passage 3531a to which the remaining oligomer adheres is rotated to the air supply side of the heat storage matrix 3531, and the oligomer is turned into fresh air. The filter 92 is provided in order to more reliably prevent the supply of the fresh air containing the oligomer to prevent the supply of fresh air. In addition, in the vicinity of the heat storage matrix 3531, a suction fan for catching the oligomer blown out of the air flow passage 3531a is provided on the side opposite to the side where the pipe 3541 is provided, and contamination of each member by the blown oligomer is provided. Is preferably prevented. Next, the two pressure sensors 3543 shown in FIG. 6 will be described. Two pressure sensors 3
One of the exhaust passages 543 is provided in a portion of the exhaust path 352 on the upstream side of the heat exchanger 353, and the other
Provided on the downstream side with respect to. The two pressure sensors 3543 both measure the pressure in the exhaust path 352, and the measured pressure is
44. Here, when oligomers accumulate in the air flow passage 3531a, two pressure sensors 3543 are formed.
There is a difference between the measured pressures, and the pressure difference increases as the deposition amount increases. Control unit 35
In 44, a predetermined threshold value for the pressure difference is set. The control unit 3544 obtains the pressure difference, and when the pressure difference exceeds the threshold value, opens the solenoid valve 93, When the pressure difference becomes lower than the threshold value, the electromagnetic valve 93 is closed to control the timing of blowing out the compressed air from the blowing nozzle 3542. Note that a timer mechanism may be provided so that compressed air is blown from the blowing nozzle 3542 every predetermined time.

As described above, since the tenter 30 of the present embodiment is provided with the heat exchanger 353, the tenter 30 has good thermal efficiency and can reliably recover heat. The heat exchanger 353 provided in the tenter 30 is more effective than the heat pipe heat exchanger system in the following points. The air flow passage of the heat pipe heat exchanger is generally non-linear, and the oligomer easily accumulates. Even if the washing pipe 354 of the present embodiment is used, the oligomer accumulated in the air flow passage is subjected to heat exchange. It is difficult to blow out the outside of the vessel 353 because the air flow passage is non-linear. Further, the heat exchanger 353 provided in the tenter 30 of the present embodiment requires a shorter airflow passage than a general heat pipe heat exchanger. Is easy to blow out.

Next, a second embodiment of the present invention will be described. The tenter according to the second embodiment is different from the tenter according to the first embodiment in that a part of the air in each section of the heat fixing zone 30c and the heat relaxation zone 30d is once collected, the temperature is adjusted, and then the temperature is adjusted. The only difference is that a catalyst that decomposes and removes oligomers is placed in the circulation path that blows the adjusted air onto the sheet-like material, and the other configurations are the same.
Here, the circulation route will be described with reference to FIG.

FIG. 7 is a conceptual cross-sectional view of one section of the heat setting zone of the tenter according to the second embodiment in the lateral direction. In addition,
In FIG. 7, the sheet is shown by a dashed line, from which oligomers are released into the compartment. The arrows in FIG. 7 indicate the flow of air.

The circulation path 36 shown in FIG. 7 is provided with two nozzle groups 361 arranged above and below the sheet, an intake fan 362, a heater 363, a catalyst 364, and a filter 365. FIG. 7 shows only the air supply path 351 and the exhaust path 352 of the heat exchange device 35.

In each of the two nozzle groups 361, a plurality of nozzles opening toward the sheet-like object are arranged at equal intervals along the lateral direction of the sheet-like object. The two nozzle groups 361 are also provided with a plurality of openings for sucking air in the section by the rotation of the suction fan 362, and the air blown from each nozzle toward the sheet-like material also passes through the openings. Inhaled immediately. Heater 363
Is a temperature adjusting mechanism for heating the air in the compartment to which the air is sucked to a predetermined temperature. The decomposition and removal of the oligomer in the catalyst 364 of the present embodiment is performed by the combustion treatment of the oligomer, and the air in the compartment is sucked from the opening provided in the nozzle group 361 to supply the catalyst 364 with an air supply path. Oxygen contained in the fresh air supplied from 351 is supplied. By passing the air in the sucked compartment through the catalyst 364, the oligomer mixed in the air is burned. The filter 365 is for removing dust and the like. That is, even if the oligomer is not completely removed even by the oligomer combustion treatment in the catalyst 364, the filter 36
By 5 the remaining oligomers are completely removed. The air that has passed through the filter 365 and has been heated and from which oligomers have been removed is blown toward the sheet from a plurality of nozzles of each of the two nozzle groups 361.

In this embodiment, since the oligomer released into the air in the compartment is decomposed and removed by the catalyst 364, the amount of the oligomer mixed in the air in the compartment is reduced as compared with the first embodiment. The amount of oligomers deposited in the air flow passage 3531a of the heat exchanger 353 is also reduced, and more reliable heat recovery by the heat exchanger 353 can be performed.

In the first and second embodiments, the exhaust passage 352 is connected to each section of the heat fixing zone 30c and the heat relaxation zone 30d. However, the present invention is shown in FIG. The exhaust path 352 is connected to the section of the neutral zone 30e, and the air in each section of the heat fixing zone 30c and the heat mitigation zone 30d is supplied to the neutral zone 30e.
e may be exhausted and heat exchanged.

[0045]

As described above, according to the tenter of the present invention, the thermal efficiency of the tenter can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a first half of a sheet-like material manufacturing apparatus.

FIG. 2 is a view for explaining the latter half of the sheet-like material manufacturing apparatus.

FIG. 3 is a perspective view of a tenter.

FIG. 4 is a schematic view of a tenter according to the first embodiment.

FIG. 5 is a partially cutaway front view of the heat exchanger provided in the tenter of the first embodiment.

FIG. 6 is a configuration diagram of a heat exchange device.

FIG. 7 is a lateral sectional conceptual view of one section of a heat setting zone of a tenter according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet manufacturing apparatus 10 Casting apparatus 11 Die 12 Rotary drum 20 Vertical stretching apparatus 21 Rotating roll 21a Preheating rotating roll 21b Stretching rotating roll 21c Cooling rotating roll 30 Tenter 31 Inlet part 32 Outlet part 33 Box 34 Chain 35 Heat exchange Device 351 Air supply path 3531 Heat storage matrix 3531a Air flow path 3532 Motor 3533 Partition seal 352 Exhaust path 353 Heat exchanger 354 Cleaning pipe 3541 Pipe 3542 Blowing nozzle 3543 Pressure sensor 3544 Control unit 36 Circulation path 361 Nozzle group 362 Heating fan 36 364 Catalyst 365 Filter 40 Winding device 91 Afterheater 92 Filter 93 Solenoid valve

Claims (3)

[Claims] 1. A tenter in which a sheet-like material being conveyed is gripped from both sides and tension is applied in the lateral direction to stretch the sheet-like material in a lateral direction, and the inside of the box-shaped tenter is provided. An air supply path for supplying air to the air, an exhaust path for exhausting air in the box, and a heat storage matrix having an air flow path that rotates so as to cross both the exhaust path and the air supply path. A heat exchanger comprising: a heat exchanger; and a blower for blowing a compressed fluid into an air flow passage of the heat storage matrix. 2. The tenter according to claim 1, wherein a catalyst for decomposing and removing sublimates generated from the thermoplastic resin is provided on the box body. 3. The box body is composed of a plurality of sections arranged in the conveying direction of the sheet-like material, and the air supply path is provided with the heat exchanger in some of the plurality of sections. 3. The tenter according to claim 2, wherein the tenter distributes the wind after passing through, and the exhaust path collects air in the plurality of sections and sends the air to the heat exchanger. .