KR101709968B1 - Low shrinkage film producting apparatus and method of manufacturing the same - Google Patents

Abstract

The present invention relates to an apparatus for producing a low heat-shrinkable film, which comprises a film supply chamber maintained in a vacuum state, a film recovery chamber, an electromagnetism heat treatment chamber disposed between the film supply chamber and the film recovery chamber, A film feed roller for feeding the film to the non-tension heat treatment chamber, a pair of non-tension control rollers provided in the non-tension heat treatment chamber for feeding the film in a non-tension state, A film collecting roller disposed in the film collecting chamber for collecting a heat-treated film, a film collecting roller disposed in the film collecting chamber for collecting the heat-treated film, Between the heat treatment chambers and between the non-thermal heat treatment chamber and the film recovery roller, and between the film supply roller and the film recovery roller A plurality of direction adjusting rollers provided above each of the plurality of direction adjusting rollers for guiding the supply of the film and the recovery of the film from above each of the film supply roller and the film recovery roller, A tension regulating roller for keeping the tension of the film constant while being moved down; Wherein the heater unit is divided into a plurality of temperature zones along a transport path of the film and is divided into a plurality of temperature zones along a width direction of the film, Wherein the control unit drives the driving speed of the tension control roller on the film feed roller side faster than the driving speed of the tension control roller on the film recovery roller side among the pair of tension control rollers driven at the same speed, And the film is transported in a non-tension state by driving the pair of non-tension control rollers at the same speed, and the direction regulating roller is driven by the film feed roller and the non- A first direction adjusting roller provided between the thermal blocking chambers, and a second direction adjusting roller provided between the muffler heat treatment chamber and the film recovery roller Wherein the tension adjusting roller comprises a first tension adjusting roller disposed between the first direction adjusting rollers and a second tension adjusting roller disposed between the second direction adjusting rollers, The film feed chamber, the film recovery chamber, and the non-reactive portion of the film on the film feed roller and the film recovery roller while the film is being fed or recovered while being moved upward or downward, The heat treatment chamber includes respective vacuum pumps, and the control unit controls whether the respective vacuum pumps are driven to differently control the degree of vacuum of the film supply chamber, the film recovery chamber, and the non-thermal heat treatment chamber.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a low-heat-shrinkable film production apparatus,

The present invention relates to an apparatus for manufacturing a low heat-shrinkable film and a method of manufacturing the same, and more particularly, to a device for manufacturing a low heat-shrinkable film and a method of manufacturing the same, which can stabilize dry heat treatment characteristics and improve characteristics of the low heat-shrinkable film.

When a flexible printed circuit board is manufactured using a polyimide film as a base film, a metal foil such as copper is directly laminated on the film via an adhesive, or the metal is directly attached to the film by vacuum deposition, sputtering or the like. However, during such a process, considerable heat is applied to the film, and the film is contracted or deformed by heat.

Thus, the film is heat-treated in advance and then cooled to improve heat shrinkability. In connection with the production of such low heat-shrinkable films, WO2007091090 has been disclosed in "Process for the production of polyester films exhibiting low heat shrinkage ".

FIG. 1 is a schematic view schematically showing a process of a conventional film heat treatment apparatus 10. As shown in the figure, in the conventional low heat shrinkable film production apparatus 10, the film F is moved between the unwinding roll 11 and the winding roll 13 by a predetermined tension. A heat source 15 is disposed on the supply path of the film F to heat-treat the film F.

In the conventional low heat-shrinkable film production apparatus 10, the film F is moved in the atmosphere and is heat-treated by ultraviolet rays and hot air. In this case, tensile force is applied to the film F which is heat-treated by driving the pair of rollers 11 and 13, so that deformation or curling may occur unintentionally. That is, since the shrinkage characteristics of the film can not be stabilized, the film is dried in the width direction and in the longitudinal direction, thereby affecting subsequent processes and operations, and causing defective products.

An object of the present invention is to solve the above problems and provide a low heat-shrinkable film production apparatus capable of producing a low heat-shrinkable film by stabilizing the shrinkage characteristics by self-weight annealing heat treatment in a vacuum state.

Another object of the present invention is to provide a low heat-shrinkable film production apparatus capable of stabilizing the shrinkage characteristics by controlling the temperature interval applied to the film in consideration of the type, thickness and width of the film.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

The object of the present invention can be achieved by an apparatus for producing a low heat shrinkable film. An apparatus for producing a low heat-shrinkable film according to the present invention includes a film supply chamber maintained in a vacuum state, a film recovery chamber, an electromagnetism heat treatment chamber disposed between the film supply chamber and the film recovery chamber, A pair of non-tension control rollers provided in the non-tension thermal processing chamber for feeding the film in an unstressed state, and a pair of tension control rollers disposed along the film feed path between the pair of tension control rollers, A film collecting roller provided in the film collecting chamber for collecting a heat-treated film, a film collecting roller provided in the film collecting chamber, for collecting the film, the film collecting roller being disposed in the film collecting chamber, And between the film heat recovery chamber and the film recovery roller, and is provided above each of the film feed roller and the film recovery roller A plurality of direction adjustment rollers for guiding the supply of the film and the recovery of the film from above each of the film supply roller and the film recovery roller, A tension adjusting roller for keeping tension of the film constant; Wherein the heater unit is divided into a plurality of temperature zones along a transport path of the film and is divided into a plurality of temperature zones along a width direction of the film, Wherein the control unit drives the driving speed of the tension control roller on the film feed roller side faster than the driving speed of the tension control roller on the film recovery roller side among the pair of tension control rollers driven at the same speed, And the film is transported in a non-tension state by driving the pair of non-tension control rollers at the same speed, and the direction regulating roller is driven by the film feed roller and the non- A first direction adjusting roller provided between the thermal blocking chambers, and a second direction adjusting roller provided between the muffler heat treatment chamber and the film recovery roller Wherein the tension adjusting roller comprises a first tension adjusting roller disposed between the first direction adjusting rollers and a second tension adjusting roller disposed between the second direction adjusting rollers, The film feed chamber, the film recovery chamber, and the non-reactive portion of the film on the film feed roller and the film recovery roller while the film is being fed or recovered while being moved upward or downward, The heat treatment chamber includes respective vacuum pumps, and the control unit controls whether the respective vacuum pumps are driven to differently control the degree of vacuum of the film supply chamber, the film recovery chamber, and the non-thermal heat treatment chamber.

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According to one embodiment, the film may be formed of any one of PI, PET, PP, PES, and OPP.

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According to one embodiment, the tension control roller is driven at a speed of 1 to 4 m / min, and the heater part heat-treats the film in a temperature range of 50 to 210 ° C.

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The apparatus for manufacturing a low heat-shrinkable film according to the present invention is characterized in that the film is heat-treated in its natural deflection state by its own weight so that the film can be kept in an unarmed state in an annealing chamber maintained in a vacuum state, To produce a low shrinkable film.

Accordingly, when the heat treatment is proceeded in the state where the conventional tensile force is applied when the shrinkage ratio is verified, 0.3% or less is required. However, the apparatus for producing a low heat shrinkable film according to the present invention can satisfy the shrinkage ratio within 0.1%.

In the apparatus for manufacturing a low heat shrinkable film according to the present invention, the heater is divided into a plurality of temperature control sections along the width direction and the longitudinal direction, and the heat treatment is performed so that the difference in heat transfer and tension between the left and right ends It is possible to prevent the phenomenon of bending due to contraction unevenness caused by the shrinkage.

1 is a schematic view schematically showing a heat treatment process of a conventional film heat treatment apparatus,
FIG. 2 is a schematic view schematically showing a configuration of an apparatus for manufacturing a low heat-shrinkable film according to the present invention,
3 is a view illustrating an operation of controlling an electroless roller of an apparatus for manufacturing a low heat shrinkable film according to the present invention.
4 is a view illustrating an example of a heat treatment section of the apparatus for manufacturing a low heat shrinkable film according to the present invention.
5 is an exemplary view showing a temperature interval of a heater of the low heat-shrinkable film production apparatus according to the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

2 is a schematic view schematically showing a configuration of an apparatus 100 for manufacturing a low heat-shrinkable film according to the present invention.

As shown in the figure, the low heat shrinkable film production apparatus 100 includes a film supply chamber 110 for supplying a film F, a film recovery chamber 120 for recovering a heat treated film F, And a heating unit 140 provided in the non-thermal processing chamber 130 to apply heat to the film F. The heating unit 140 is disposed in the chamber 130 for heating the film F, A control unit 160 for controlling the respective components so that the film F is heat-treated at a high speed in an emissive state in the non-thermal processing chamber 130, a cooling unit 150 for cooling the heat- .

Both the film supply chamber 110 and the film recovery chamber 120 and the non-thermal heat treatment chamber 130 are kept in a vacuum state. To this end, the film supply chamber 110, the film recovery chamber 120, and the non-thermal processing chamber 130 are kept in an airtight state, and vacuum pumps 113, 123 and 131 are separately provided, respectively. The degree of vacuum of the film supply chamber 110, the film recovery chamber 120, and the non-thermal heat treatment chamber 130 can be adjusted differently under the control of the controller 160.

A first partition 111 is provided between the film supply chamber 110 and the non-thermal processing chamber 130 and a second partition 121 is provided between the non-thermal processing chamber 130 and the film recovery chamber 120. The first barrier ribs 111 and the second barrier ribs 121 are provided to be openable and closable. Thereby, the operator can replace the film (F).

Here, the film (F) used in the present invention may be formed of one of PI, PET, PP, PES and OPP.

A film supply roller 115 is provided in the film supply chamber 110. The film feed roller 115 rotates under the control of the controller 160 to adjust the tension of the film F and feed the film F to the non-tension heat treatment chamber 130 side.

A first direction adjusting roller 118 is provided between the film feed roller 115 and the tensionless heat treatment chamber 130. A plurality of first direction adjustment rollers 118 may be provided along the movement path between the film supply roller 115 and the first bank 111.

A first tension adjusting roller 117 for adjusting the tension of the film F may be provided between the first direction adjusting rollers 118. The first tension adjusting roller 117 is moved up and down so that the tension of the film F is kept constant.

In the film recovery chamber 120, a film recovery roller 125 is provided. The film recovery roller 125 rotates under the control of the controller 160 and recovers the film F that has been subjected to the heat treatment. A second direction adjusting roller 128 for adjusting the feeding direction of the film F and a second tension adjusting roller 127 for adjusting the tension of the film F may be provided in the film recovery chamber 120 . The second tension adjusting roller 127 is moved up and down under the control of the controller 160 to loosely or tightly transport the film F and adjust the strength of the tension.

The annealing heat treatment chamber 130 applies heat in a vacuum state to the film F supplied from the film supply chamber 110 so as to improve shrinkage characteristics. The non-tension thermal processing chamber 130 includes a first non-tension control roller 133 that receives the film F from the film supply chamber 110 and a second non-tension control roller 134 that is spaced apart from the first non- 135). A first film guide (not shown) is disposed between the first partition wall 111 and the first tension control roller 133 to adjust the tension of the film F to supply the film F to the first tension control roller 133, A second film guide roller 139 arranged between the second tension control roller 135 and the second partition wall 121 to align the film F after the heat treatment and transferring the tensioned film by adjusting the tension, .

The first tension control roller 133 and the second tension control roller 135 cause the film F to be transported by the load under the control of the controller 160 in an unarmed state. 3 is an exemplary view showing a process in which the first tension control roller 133 and the second tension control roller 135 transfer the film F in the non-tension state.

Immediately after the film F is replaced as shown in FIG. 3A, the first and second non-tension control rollers 133 and 135 rotate at the same speed (a). At this time, a certain tension is applied to the film (F).

Thereafter, as shown in Fig. 3 (b), the speed c of the second tension control roller 135 is lowered and the speed b of the first tension control roller 133 is increased (b> c) , The film F is sagged downward by the load after passing through the first tension control roller 133. [ And is conveyed to the side of the second force control roller 135 after falling down by the load of the film F.

3 (c), when the speed d of the first and second tension control rollers 133 and 135 is adjusted to be the same, the film F is in the non-tension state It is transported by load.

A film supporting roller 136 for guiding the film F struck by the load is provided between the first and second non-tension control rollers 133 and 135. The film support roller 136 aligns the film F stuck and guides it to the second tension control roller 135 side.

The control unit 160 controls the speeds of the first and second force control rollers 133 and 135 as shown in FIG. 3 so that the film F is delivered in the non-tension state. The control unit 160 controls the driving of the first and second force control rollers 133 and 135 so that the film F is fed at a speed of 1 to 4 m / min. As a result, the film F is moved at high speed in the non-tension state, and the heat treatment is performed in contact with the heater 140.

The heater unit 140 is disposed on the transport path of the film F between the first tension control roller 133 and the second tension control roller 135. [ The heater unit 140 may be implemented by various methods such as a heater, ultraviolet rays, and hot wind. The heater unit 140 according to the present invention is provided such that the temperature thereof varies in multiple stages along the transport path of the film F. [

The heater 140 sequentially regulates the temperature from 50 ° C to 210 ° C. 4, the heater 140 may be divided into five sections T1, T2, T3, T4 and T5 along the path along which the film F is transported, as shown in FIG. . In this case, the T1 interval is divided into 50 to 80 ° C, the T2 interval is 80 to 120 ° C, the T3 interval is 120 to 150 ° C, the T4 interval is 150 to 180 ° C, and the T5 interval is 180 to 210 ° C.

The temperature range can be divided into 5 to 7 steps and the temperature range and the temperature range of each section can be controlled differently depending on the type of the film (F) and the thickness of the film (F). At this time, the length of the temperature section is also differently controlled according to the thickness of the film (F), and the temperature influence on the surface of the film (F) is controlled differently.

The reason why the temperature section of the heater unit 140 is provided in multiple stages is that if the temperature condition is set to the same value and the film F is exposed to a high temperature, the damage to the film F is large, Because.

5, the heater unit 140 may control the temperature condition not only in the longitudinal direction but also in the width direction of the film F as shown in FIG. That is, the heater unit 140 can control the widthwise heat treatment temperature of the film F by dividing the temperature control region into three to five in the width direction of the film F.

The temperature in the width direction of the film F is controlled to be different from that in the case where heat is applied by the heater 140, so that heat can not be uniformly transferred to the entire region of the film F.

Accordingly, as shown in FIG. 5, the temperature Tb of the middle region in the width direction of the film F can be set lower than the temperatures Ta and Tc on both sides. For example, when the temperature range of T1 is 50 to 80 占 폚, the temperature Tb in the center region is set to 70 占 폚, and the temperatures Ta and Tc on both sides can be set to 80 占 폚.

The heater 140 can divide the film F into a plurality of regions in the longitudinal direction L and the widthwise direction W and adjust the temperature ranges to be different from each other to minimize the shrinking deformation of the film F .

The cooling unit 150 is in contact with the heat-treated film F via the heater unit 140 and cools the film F in a short time.

The manufacturing process of the apparatus 100 for manufacturing a low heat-shrinkable film according to the present invention having such a configuration will be described with reference to FIGS. 2 to 5. FIG.

The operator opens the first bank 111 and the second bank 121 and replaces the film F. [ The film supply chamber 110, the film recovery chamber 120, and the non-thermal heat treatment chamber 130 are evacuated by driving the first vacuum pump 113, the second vacuum pump 123 and the third vacuum pump 131, .

When the film feed roller 115 and the film collecting roller 125 are driven under the control of the controller 160, the film F is supplied to the first force control roller 133. As shown in FIG. 3, the first and second force control rollers 133 and 135 are controlled to have different driving speeds, so that the first and second force control rollers 133 and 135, The film F is transported in a state in which it is naturally stuck downward by a load. The film F is conveyed at a high speed in the state of no force, and is contacted with the heater 140 and heat treatment proceeds.

At this time, the heater 140 is provided to have a different temperature interval in the longitudinal direction and the width direction of the film F, and the film F is in contact with the high temperature in order. This makes it possible to prevent the film (F) from being shrunk by making contact with high temperature heat at one time.

The heat-treated film F is cooled after being brought into contact with the cooling section 150 and recovered to the film collection roller 125.

As described above, in the apparatus for manufacturing a low heat-shrinkable film according to the present invention, the film is heat-treated in a natural deflection state by its own weight so that the film can be maintained in an emissive state within the heat- Shrinkage can be stably carried out, and a low shrinking film can be produced.

Accordingly, when the heat treatment is proceeded in the state where the conventional tensile force is applied when the shrinkage ratio is verified, 0.3% or less is required. However, the apparatus for producing a low heat shrinkable film according to the present invention can satisfy the shrinkage ratio within 0.1%.

In the apparatus for manufacturing a low heat shrinkable film according to the present invention, the heater is divided into a plurality of temperature control sections along the width direction and the longitudinal direction, and the heat treatment is performed so that the difference in heat transfer and tension between the left and right ends It is possible to prevent the phenomenon of bending due to contraction unevenness caused by the shrinkage.

The embodiments of the apparatus for manufacturing a low heat shrinkable film of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. You will know very well. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

100: low heat-shrinkable film production apparatus 110: film supply chamber
111: first partition 113: first vacuum pump
115: Film feed roller 117: First tension adjusting roller
118: first direction regulating roller 120: film recovery chamber
121: second partition 123: second vacuum pump
125: film collecting roller 127: second tension adjusting roller
128: second direction regulating roller 130: non-tension heat treatment chamber
131: third vacuum pump 133: first muffler control roller
135: second non-tension control roller 136: film supporting roller
137: first film guide roller 139: second film guide roller
140: heater part 150: cooling part
160:

Claims (7)

A film supply chamber maintained in a vacuum state, a film recovery chamber, and an electromagnetism heat treatment chamber disposed between the film supply chamber and the film recovery chamber;
A film supply roller provided in the film supply chamber and supplying the film to the non-thermal heat treatment chamber;
A pair of electromagnetism control rollers provided in the electromagnetism heat treatment chamber for transferring the film to the electromagnetism state;
A heater disposed between the pair of non-tension control rollers along a transport path of the film to heat-treat the film;
A cooling unit for cooling the film passed through the heater unit;
A film collecting roller provided in the film collecting chamber for collecting the heat-treated film;
The film feed rollers and the film collecting rollers are disposed between the film feed rollers and the non-thermal heat treatment chambers, and between the non-thermal heat treatment chambers and the film collecting rollers, A plurality of direction adjusting rollers guiding each of them from above;
A tension regulating roller provided below the plurality of direction regulating rollers and moving upward and downward toward the direction regulating roller so as to maintain the tension of the film constant;
And a controller for controlling a driving speed of the electromagnetism control roller,
The heater section is divided into a plurality of temperature sections along the transport path of the film, the temperature is divided by a plurality of temperature sections along the width direction of the film,
Wherein,
The driving speed of the non-tension control roller on the film feed roller side of the pair of non-tension control rollers driven at the same speed is faster than the driving speed of the tension control roller on the film recovery roller side, And the film is transported in a non-tension state by driving the pair of tension control rollers at the same speed again,
Wherein the direction adjusting roller comprises a first direction adjusting roller provided between the film supply roller and the non-thermal thermal blocking chamber, and a second direction adjusting roller provided between the non-thermal thermal processing chamber and the film collecting roller,
Wherein the tension adjusting roller comprises:
A first tension adjusting roller provided between the first direction adjusting rollers and a second tension adjusting roller provided between the second direction adjusting rollers,
The film is loosened or stretched in the process of feeding or collecting the film while being moved up and down by the control unit to prevent the film from being biased on the film feed roller and the film collecting roller,
Wherein the film supply chamber, the film recovery chamber, and the non-thermal heat treatment chamber each have a vacuum pump,
Wherein the control unit controls whether the respective vacuum pumps are driven to control different degrees of vacuum of the film supply chamber, the film recovery chamber, and the non-thermal heat treatment chamber.
delete The method according to claim 1,
Wherein the film is formed of one of PI, PET, PP, PES, and OPP.
delete The method according to claim 1 or 3,
Wherein the tension control roller is driven at a speed of 1 to 4 m / min, and the heater unit performs the heat treatment of the film in a temperature range of 50 to 210 ° C.
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