TWI782154B - Manufacturing apparatus and manufacturing method of polymer film - Google Patents

Abstract

To provide a method for continuously and uniformly manufacturing a polymer film with a specific shape without using a soluble polymer for engineering and a special solvent, and a manufacturing device for realizing the manufacturing method. The production method of the polymer film of the present invention is to coat the top surface of the convex portion with a polymer material while conveying the stretchable mold with the top surface of the convex portion having a specific shape and forming concavities and convexities. After the coating material is dried to form a polymer film, the mold is stretched or contracted more than once, the polymer film is peeled from the top surface of the convex part to obtain a polymer film, and the peeled high polymer film with a specific shape is recovered. molecular film.

Description

Apparatus and method for producing polymer film

The present invention relates to a method and a device for manufacturing a polymer film with a specific shape after coating a polymer material on a mold with a specific shape and then performing peeling and recycling.

In terms of the production method of the polymer film having a specific shape, there is a method of coating a polymer material on a mold with a specific shape, transferring it to a water-soluble polymer film different from the polymer material before drying, and then dissolving the water-soluble A method of dissolving a permanent polymer in water to obtain a polymer film with a specific shape.

For example, Patent Document 1 discloses a method for producing a polymer thin film in which the following steps are performed sequentially.

(a) Adsorb the polyfunctional molecule on a region of any shape between the liquid phase and the interface of the matrix.

(b) polymerizing and/or crosslinking the adsorbed polyfunctional molecules to form a polymer film.

(c) The formed thin film is peeled off from the substrate.

Also, Patent Document 2 discloses a method for producing a film-like polymer structure having a functional substance on the surface (A surface) and the back surface (B surface) of the film. More specifically, for example, a method of manufacturing a film-like structure is disclosed, which sequentially performs the following steps.

(a) Adsorb the polyfunctional molecule on a region of any shape between the liquid phase and the interface of the matrix.

(b) polymerizing and/or crosslinking the adsorbed polyfunctional molecules to form a polymer film.

(c) After the functional substance is bonded to the surface A of the formed thin film, a water-soluble polymer film is formed thereon.

(d) peeling the thin film and the soluble water-soluble support film from the substrate.

(e) After bonding the same functional substance as the functional substance bonded to the A surface or a different functional substance to the B surface of the film, the soluble water-soluble polymer film is dissolved with a solvent.

[Prior Art Literature] [Patent Document]

[Patent Document 1] International Publication No. 2006/025592

[Patent Document 2] International Publication No. 2008/050913

However, in the method for producing a polymer film disclosed in Patent Document 1, in order to peel the polymer film from the substrate, it is necessary to soak it in a predetermined solvent or the like. Then, the polymer film in the state peeled off from the substrate must be applied to an object such as a biological tissue while maintaining a state soaked in a solvent, so there is a problem that the handling property (handling) is remarkably low.

In addition, in the method for producing a polymer film described in Patent Document 2, in order to obtain a polymer film of any shape to which functional substances are added on the surface and the back surface, it is necessary to form the polymer film on the surface A after binding the functional substance to the surface. Soluble water-soluble polymer film, and then peeled off from the substrate. Then, it is necessary to bind the functional substance to the B surface, and finally dissolve the water-soluble polymer film with water, so the process is complicated and the productivity is low.

The purpose of the present invention is to provide a method for continuously and uniformly manufacturing a polymer film with a specific shape without using a soluble polymer for engineering or a special solvent, and a manufacturing device for realizing the manufacturing method.

The production device of the polymer film of the present invention is a production device for producing a polymer film with a specific shape, comprising: a stretchable mold, the surface of which is formed with concavities and convexities, and the shape of the top surface of the convex part is the aforementioned specific shape; The mold supply means supplies and conveys the mold; the coating unit coats the top surface of the convex part of the mold conveyed by the mold supply means to coat the surface on which the unevenness is formed. The coating material of the material; the drying unit is located on the downstream side of the conveying direction compared with the aforementioned coating unit, and the coated aforementioned coating material is dried to form a polymer film; the peeling unit is located on the downstream side of the conveying direction than the aforementioned drying unit , by stretching or contracting the mold more than once to obtain the polymer film by peeling the polymer film material from the top surface of the convex part; polymer film.

Also, the production method of the present invention is a production method for producing a polymer film having a specific shape, wherein a stretchable mold is conveyed, and the above-mentioned mold has concavities and convexities formed on the surface, and the shape of the top surface of the convex part is as described above. To specify the shape, a coating material containing a polymer material is applied to the surface on which the unevenness is formed so as to cover the top surface of the convex portion of the conveyed mold, and then the coated polymer material is dried and formed. forming a polymer film, and then stretching or contracting the mold more than once, peeling the dried polymer film from the top surface of the convex portion to obtain a polymer film, and recovering the polymer film peeled from the mold. film.

According to the present invention, the polymer material is directly coated on the stretchable mold, and after the polymer material is given a specific shape, the polymer film can be recovered in a dried state. Because it saves the process of coating a raw material film as a water-soluble polymer film as in the prior art, and then dissolving the water-soluble polymer film to take out the polymer film, it can reduce the cost of polymer film production and improve productivity. In addition, the present invention does not involve the process of dissolving the water-soluble polymer film, and since the polymer film can be recovered in a dried state, it can be treated as fine particles, and the use can be expanded.

10, 70, 80, 90‧‧‧Molecular film manufacturing equipment

11. 11A‧‧‧Moulding

13. 74‧‧‧Coating materials

14‧‧‧polymer film

15‧‧‧convex part

15a‧‧‧top surface

16‧‧‧polymer film

20‧‧‧Mould supply means

21, 210‧‧‧roller out

21a, 22a, 25, 26‧‧‧guide roller

22, 160, 170, 250‧‧‧Take-up roller

23, 24, 34, 91‧‧‧Drive roller

27‧‧‧Controller

28‧‧‧End detection sensor

30, 71‧‧‧coating unit

31, 72, 130‧‧‧slot die

32‧‧‧Support roller

33, 53, 54, 140, 221‧‧‧Pinch roller

40, 75‧‧‧drying unit

50‧‧‧Peeling unit

55, 92‧‧‧tension adjusting roller

60‧‧‧recycling unit

61‧‧‧Suction nozzle

62‧‧‧Negative pressure generating device

63‧‧‧Trapping material

81‧‧‧Substrate unwinding roller for coating

82‧‧‧Substrate take-up roll for coating

83‧‧‧Substrate for coating

100, 200‧‧‧Mold making device

101, 201‧‧‧Mold

102‧‧‧thermosetting resin

103‧‧‧Substrate

104‧‧‧Laminated body of thermosetting resin and substrate

110‧‧‧1st heating roller

120‧‧‧The second heating roller

150, 240‧‧‧Peeling roller

202‧‧‧Film

220‧‧‧Heating roller

230‧‧‧cooling roll

Fig. 1 is a schematic cross-sectional view of an apparatus for producing a polymer thin film according to the present invention.

Fig. 2 is a schematic diagram of an example of a mold applied to the present invention. Fig. 2 (a) is the plastic mold that the top surface of convex portion is circular, and Fig. 2 (b) is the plastic mold that the top surface of convex portion is polygonal.

Fig. 3 is a schematic view of a peeling unit of the polymer thin film production apparatus of the present invention viewed in cross section.

Fig. 4 is a schematic sectional view of an apparatus for producing a polymer thin film according to another aspect of the present invention.

Fig. 5 is a schematic sectional view of an apparatus for producing a polymer thin film according to another aspect of the present invention.

Fig. 6 is a schematic sectional view of an apparatus for producing a polymer thin film according to another aspect of the present invention.

Fig. 7 is a schematic view of an example of an apparatus for producing a mold applied to the production of a polymer film having a specific shape according to the present invention, viewed from the surface.

Fig. 8 is a schematic cross-sectional view of an example of an apparatus for producing a mold applied to the production of a polymer film having a specific shape according to the present invention.

Fig. 9 is a schematic view showing changes in the polymer film and mold used in the peeling unit of the present invention.

Fig. 10 is a photograph of a laminate of a mold and a polymer film obtained in the middle of the production method of the present invention observed with an electron microscope.

FIG. 11 is a photograph of the polymer film with a specific shape manufactured in Example 1 observed with an electron microscope.

FIG. 12 is a photograph of the polymer film with a specific shape manufactured in Example 2 observed by an electron microscope.

The manufacturing apparatus of the polymer thin film having a specific shape of the present invention is a machine or member at least equipped with the following (a) to (f).

(a) A stretchable mold having concavities and convexities formed on the surface and the shape of the top surface of the convex part is the above-mentioned specific shape.

(b) Mold supply means for supplying and transporting the aforementioned molds.

(c) A coating unit for coating a coating material containing a polymer material on the surface on which the unevenness is formed so as to cover the top surface of the convex portion of the mold conveyed by the mold supply means.

(d) A drying unit for drying the coated polymer material to form a polymer film, located on the downstream side of the coating unit in the conveying direction.

(e) Located on the downstream side of the drying unit in the conveying direction, the polymer film is obtained by extending or contracting the mold more than once to peel the polymer film material from the top surface of the convex portion Strip unit.

(f) A recovery unit for recovering the polymer film peeled from the top surface of the protrusion.

Fig. 1 is a schematic cross-sectional view of an example of the production apparatus of the polymer thin film of the present invention. Fig. 2 is a schematic diagram of an example of a mold applied to the present invention. Fig. 2 (a) is that the top surface of the mold is circular, and Fig. 2 (b) is a schematic diagram of the mold with the top surface of the convex part seen from the surface and section. The top surface 15a of the convex portion 15 formed with a concavo-convex structure on the surface of the mold 11 is a shape corresponding to the specific shape of the final polymer film 16 to be obtained. The manufacturing apparatus 10 of the polymer film 16 is to coat the top surface 15a of the convex part 15 of the stretchable mold 11 by coating the coating material 13 containing the polymer material, and drying the coating material 13 to form a polymer film. After 14, the polymer film 16 is obtained by peeling off the polymer film 14 through the expansion and contraction of the stretchable mold 11, and the polymer film 16 having the same shape as the top surface 15a of the convex portion 15 is recovered by the recycling unit 60. film16.

In addition, the coating material 13 containing a polymer material may be one in which the polymer material is dissolved by a solvent, or one in which the polymer material is melted by heating. In consideration of the ease of coating, it is preferable to select a polymer material that dissolves the polymer material in a solvent because it is easy to adjust the viscosity and solid content concentration of the coating material 13 .

As shown in Figure 1, the manufacturing apparatus 10 of the polymer film 16 of the present invention is provided with: the roll-shaped mold 11 of stretchability; The mold supply means 20 that drives conveyance mold 11; The coating unit 30 on the surface of the mold 11; the drying unit 40 for drying the coated coating material 13; the stripping unit 50 for stripping the polymer film 14 from the surface of the mold 11; and the recovery unit 60 for recovering the stripped polymer film 16 . The outline of each composition is as follows.

The roller-shaped flexible mold 11 is formed with concavities and convexities on the surface, and the top surface 15a of the convex part 15 has a specific shape of a circle (refer to FIG. 2(a)) or a polygon (refer to FIG. 2(b)). shape. The mold 11 is preferably made of a material resistant to chemicals such as solvents used in the coating material 13 and has a uniform thickness so that the coating material 13 can be uniformly coated. Here, the so-called drug resistance refers to the volume change rate of the mold 11 soaked in the coating material 13 at room temperature for 72 hours in a test based on JIS-K-6258 (2003 edition). Below 5%. When there is no chemical resistance, because the surface of the mold 11 is swelled by the medicine, the peeling of the polymer film 16 is hindered, and the mold 11 is broken when the mold 11 expands and contracts, so it has chemical resistance. is better.

The mold supply means 20 includes: a roll-out roller 21 for continuously rolling out the roll-shaped mold 11; a take-up roll 22 for winding the rolled-out mold; Driving rollers 23, 24; a driving means for rotating each roller, not shown in the figure, and guide rollers 21a, 25, 26, 22a matching the transport path of the mold. It is preferable that the unwinding roller 21 and the take-up roller 22 can adjust the conveying tension, and it is preferable to control the tension so that the elongation of the mold 11 during conveying with respect to the conveying direction becomes 10% or less. The transfer speed of the mold 11 is adjusted by the drive roller 23 arranged to face the nip roller 53 and the drive roller 24 arranged to face the nip roller 54 .

The coating unit 30 may be any one that can uniformly and continuously coat the coating material 13 in a constant amount in the width direction of the mold 11 . For example, a structure combining a discharger constituted by a slit die 31 as shown in FIG. 1 and a liquid feeding mechanism capable of continuously supplying a fixed amount of coating material may be used. In addition, in order to maintain the gap between the discharge front end surface of the slit die 31 and the mold 11 with high precision, the backup roller 32 may be arranged on the opposite side of the coating surface of the mold 11 . It is also preferable to provide a position adjustment mechanism that can adjust the position of the slit die 31 with high resolution on the left and right.

As the drying unit 40, in order to dry the applied coating material 13 in a short time, it is preferable to include heating means such as hot air and far infrared rays. In addition, a local exhaust device for recovering or exhausting volatilized solvents may also be provided.

The peeling unit 50 is equipped with a nip functioning as a tension cutting mechanism that cuts off the tension applied to the conveyance of the mold 11 in the peeling section belonging to the conveyance path that connects the nip roller 53, the tension adjustment roller 55, and the nip roller 54. Holding roller 53, driving roller 23, nip roller 54, and driving roller 24; and the tension for adjusting the stretching of mold 11 to the elongation required for peeling off polymer film 14 from mold 11 is used as a tension adjusting mechanism. Function of the tension adjustment roller 55. Preferably, the tension generated in the mold supply means 20 is interrupted by pressing the pinch roller 53 and the drive roller 23 and the pinch roller 54 and the drive roller 24 functioning as the tension interrupting mechanism. In terms of the tension adjusting mechanism, it is only necessary to extend the length of the mold 11 by an amount required to peel the polymer film 14 from the mold 11 . Specifically, the mold 11 gripped by the nip roller 53 and the driving roller 23 and the nip roller 54 and the driving roller 24 is applied from the surface opposite to the surface of the mold 11 on which the coating material is applied by using the tension adjustment roller 55 . A mechanism that stretches the mold 11 under tension is preferred. According to the investigation of the inventors, it is preferable to extend the length of the mold 11 to 3 times or more the length of the peeling zone before tension is applied.

The recovery unit 60 has means for recovering the polymer film 16 peeled from the surface of the mold 11 . In terms of recovery means, it is preferable to use the suction nozzle 61 connected to a negative pressure generating device 62 such as a vacuum pump. Besides, it is also possible to use a recycling method in which the liquid flows on the surface of the mold 11 and the polymer film 16 is dispersed in the liquid. Also, in the case of using any recovery means, in order to collect the polymer film 16 recovered by the recovery means, it is preferable to set a collection material 63 such as a non-woven fabric or a membrane filter (membrane filter) on the polymer film 16 in advance. The thin film 16 continues to flow on the path.

A series of manufacturing operations using the manufacturing apparatus 10 of the polymer thin film 16 is as follows. The stretchable mold 11 is unwound from the unwinding roll 21 , passes through the path of the coating unit 30 , drying unit 40 , peeling unit 50 , and recovery unit 60 , and is wound up by the take-up roll 22 . The mold 11 is given a constant tension necessary for conveyance by the mold supply means 20 , and is conveyed at a predetermined speed by the rotation of the driving roller 23 and the driving roller 24 . Next, the coating material 13 containing a polymer material is coated by the coating unit 30 so as to cover the top surface 15 a of the convex portion 15 of the mold 11 . After coating, the residual solvent in the coating material 13 is volatilized by passing through the drying unit 40 , and the polymer film 14 having a specific shape of the top surface 15 a is formed on the top surface 15 a of the convex portion 15 of the mold 11 . After that, the mold 11 on which the polymer film 14 is formed is in a state where the conveyance tension is cut off because it is pinched by the nip roller 53 and the driving roller 23 and the nip roller 54 and the driving roller 24 of the peeling unit 50, and is further Tension adjustment rollers 55 apply tension. The mold 11 to which tension is applied is stretched according to the tension. At this time, when the mold 11 is stretched beyond the extensible length of the polymer film 14 that is volatilized and dried by the solvent, the polymer film 14 cannot follow its elongation, and the lamination interface between the mold 11 and the polymer film 14, that is, Peeling occurs at the interface between the polymer film 14 and the mold 11 , and the polymer thin film 16 floats from the surface of the mold 11 . According to the examination of the inventors, if the mold 11 is extended by 300% or more, the polymer film 14 can be peeled off from the mold 11 almost surely. Therefore, the surface of the mold 11 using the peeling unit 50 is provided with a suction nozzle 61 controlled to a negative pressure by a negative pressure generating device 62 such as a vacuum pump, so that the polymer film 16 peeled from the surface of the mold 11 is sucked. The one with the lower pressure is captured by the non-woven collecting material 63 provided between the suction nozzle 61 and the negative pressure generating device 62 . The mold 11 from which the polymer film 16 has been recovered from the surface is continuously wound up by the winding roll 22 as it is. The above-mentioned operations are performed continuously.

Through the configuration and operation of the above-mentioned device, the polymer film 16 having a specific shape can be formed. In the state where the elongation of the stretchable mold 11 is 10% or less, by coating the surface of the mold 11 with a coating material 13 containing a polymer material, the top surface 15a of the convex portion 15 of the mold 11 can be covered. The specific shape with high precision is transferred to the polymer material. In addition, since the through-coating unit 30 uses the slit die 31, the polymer material can be coated in an amount necessary to form the polymer thin film 16, so that the material cost can be reduced.

Then, in the peeling unit 50, the mold 11 is stretched and stretched, and the polymer film 14 is peeled off from the mold 11 to form a polymer film 16, and the polymer film 16 is recovered by suction in the recovery unit 60, because the recycled polymer film 16 Since it is in a dried state, it is easy to handle and can expand applications. The mold 11 wound up by the take-up roller 22 may be managed by exchanging the mold 11 at the point of deterioration or when a defect occurs, and the cost related to the mold 11 can be kept low.

Next, the configuration of each part will be described in detail with reference to FIGS. 1 to 6 . The surface of the plastic mold 11 is processed with a fine concave-convex structure, which is flexible and can be wound into a drum shape. The amount of elongation of the mold 11 in a direction parallel to the conveyance direction is preferably 200% or more, but considering the allowable elongation until rupture, the stretching rupture rate is more preferably 300% or more. Here, the so-called expansion and contraction rupture rate refers to the value defined in JIS-C-2151 (2006 edition), which is divided by the length of the mold 11 before the tensile force is applied when the tensile force is applied. The value after the length of the mold 11 at the time when the mold 11 is broken. Regarding the recovery rate indicating the dimensional recovery rate after stretching, the recovery rate after stretching to an elongation rate of 300% is preferably at least 95%, more preferably at least 98%. Due to the high recovery rate after elongation, not only the peeling off of the polymer film 14 and the mold 11 is promoted, but also the mold 11 can be reused. In addition, in terms of the concave-convex structure of the surface, it is suitable that the convex portions 15 are arranged in a close-packed manner. The reason is that the ratio of the area of the top surface 15a of the convex portion 15 to the total area of the mold 11 increases, and when the coating material 13 is coated, not only can more polymer films 16 be obtained, but also the stability of the coating can be increased. . As shown in FIG. 2 , the shape of the top surface 15 a of the convex portion 15 may be, for example, a circle ( FIG. 2( a )) or a polygon ( FIG. 2( b )). The shape of the top surface 15a does not need to be geometrically complete as viewed from the surface on which the unevenness is formed, as long as it can be recognized as being similar to each shape, it may be approximately circular or approximately polygonal. In terms of the shape of the convex portion 15, the top surface 15a is preferably columnar with an area of ^3000-10000 μm and a height of 10-200 μm, and more preferably a top surface 15a with an area of ^5000-8000 μm and a height of 50-100 μm. columnar, and viewed from the surface on which the concavo-convex is formed, it is preferably arranged with the closest packing. The width of the concave portion (interval between adjacent convex portions 15 ) in the closest-packed arrangement is preferably set to the smaller one within the range in which the concave-convex structure can be processed, preferably 50 μm or less, more preferably 20 μm or less. Although the material of the applied mold 11 can be any one of thermosetting resin, thermoplastic resin, and light-curing resin, in addition to high stretchability and recovery rate, it is also easier to impart thermosetting properties to the concave-convex structure. Resin is more suitable. Although, for example, silicone rubber, urethane rubber, nitrile rubber, fluororubber, ethylene propylene rubber, chloroprene rubber, polyurethane, styrene butadiene rubber, etc. can be suitably used, it is considered It is more preferable to select an appropriate material for the resistance to the chemical used for the coating material 13 .

The mold supply means 20 is provided with: a roll-out roller 21 that continuously rolls out the mold 11 from the mold 11 rolled into a roll; a take-up roller 22 that takes up the rolled-out mold 11; and conveys the mold at a constant speed. 11 driving rollers 23, 24; driving means for rotating each roller not shown in the figure; and guide rollers 21a, 25, 26, 22a matching the transport path of the mold. As for the driving means for driving the rollers, since the mold 11 has stretchability, it is preferable to adjust the conveying tension applied to the mold 11 in order to prevent the mold 11 from being stretched unnecessarily due to tension. It is better to adjust the conveying tension in the range of 1N~100N with a resolution of 0.1N. As a driving means for determining the conveyance speed of the mold 11, a driving roller 23 and a driving roller 24 are provided. The driving roller 23 and the driving roller 24 are arranged opposite to the pinch roller 53 and the pinch roller 54 respectively, and the driving force is transmitted to the mold 11 by pinching the pinch roller 53 and the pinch roller 54 through the mold 11 , the plastic mold 11 can be transported at a set speed. The driving means of the driving roller 24 is preferably made to be connected to the end of the driving roller 23 by a chain or a belt, so that it can rotate in conjunction with the driving roller 23, or to use a motor that can be synchronized with the speed of the driving roller 23, etc., so that it can be independently spin around. The driving roller 23 is connected to a driving means such as a motor (not shown), and can rotate while controlling the speed. The speed is preferably conveyed in the range of 1 to 30 m/min, and productivity can be improved while coating the coating material 13 containing a polymer material with high precision.

Also, it is preferable to provide a mold meandering correction mechanism because the mold 11 can be transported stably. As shown in FIG. 1 , a preferred form of the mold snaking suppression mechanism is that, in the transport path of the mold 11, the end detection sensor 28 that detects the position of the end of the mold 11 and the detected The controller 27 for controlling the movement of the unwinding roller 21 and the take-up roller 22 to adjust the transfer position of the mold 11 has one or more controllers.

In terms of driving means for the unwinding roller 21 and the winding roller 22 , it is preferable that the position of each roller can be adjusted in a direction perpendicular to the conveyance direction of the mold 11 . Preferably, it is a structure in which the amount of movement is adjusted in the direction to be moved based on the value from the end detection sensor 28 . With the above-mentioned meandering suppression mechanism of the mold 11, the coating position of the coating material 13 can be kept constant, and the polymer film 16 with uniform thickness and shape can be formed.

The coating unit 30 is arranged on the upstream side of the drying unit 40 in the conveyance direction during the conveyance of the mold 11 , and includes a slit die 31 and a coating material supply mechanism connected thereto. The slit dies 31 face each other so that the coating material 13 containing a polymer material can be coated on the surface of the mold 11 on which the uneven surface structure is formed. In order to form a uniform coating film, it is preferable to maintain the gap between the slit die 31 and the mold 11 with high precision and uniformity. As shown in FIG. The surface on the opposite side of the surface supports the mold 11. Here, regarding the distance between the slit die 31 and the mold 11, the distance between the discharge surface of the slit die 31 and the top surface 15a of the convex portion 15 on the surface of the mold 11 can be controlled at an interval of 10 μm to 500 μm. It is better to set the method in advance. In addition, the accuracy of the interval (the distance between the slit die 31 and the top surface 15 a ) in the direction perpendicular to the conveyance direction is preferably 10 μm or less, more preferably 3 μm or less. In addition, in order to realize the accuracy in the present invention, the straightness and rotation deviation of the support roller 32 are preferably 5 μm or less, more preferably 1 μm or less. In addition, although the coating method using the slit die 31 is exemplified here, other coating methods may also be used.

As a coating material supply mechanism, what is necessary is just to be able to continuously and uniformly carry out liquid supply according to the film thickness of a target. Although one can choose, for example, quantitative liquid delivery using a syringe pump, tube pump (tube pump), etc., or constant pressure liquid delivery using compressed air and a pressure regulating mechanism, it can be easily calculated by changing the mold 11. Quantitative delivery of the liquid delivery amount of the coating material 13 at a conveying speed of 100 is preferable.

The peeling unit 50 is arranged on the downstream side of the drying unit 40 in the conveyance direction during the mold conveyance. The peeling unit 50 is composed of a tension cut-off mechanism and a tension adjustment mechanism that adjusts the tension of the mold in the peeling section. 50 is also transmitted by the tension on the downstream side of the conveying direction. The tension cutting mechanism is composed of the pinch roller 53 , the drive roller 23 , the pinch roller 54 and the drive roller 24 . As shown in FIG. 3 a , it is preferable to cut off the conveying tension generated by the mold supply means 20 by pinching the mold 11 between the nip roller 53 and the driving roller 23 and the nip roller 54 and the driving roller 24 . The tension adjustment mechanism is composed of tension adjustment rollers 55 . The tension adjustment roller 55 is preferably a mechanism capable of extending the length of the mold 11 in the peeling zone to three times or more the length of the peeling zone before tension is applied. As shown in FIG. 3( b ), the tension adjustment roller 55 is preferably a mechanism that pushes the mold 11 held by the nip roller 53 and the nip roller 54 from the surface opposite to the coating surface. In terms of the tension adjustment mechanism, specifically, a mechanism in which a freely rotatable tension adjustment roller 55 is connected to the front end of the rod of the air cylinder is preferable. By making the roller freely rotatable, the friction with the mold 11 when tension is applied can be reduced, and the situation of hindering the conveyance can be prevented. Also, by using the air cylinder, since the stroke of the air cylinder can be controlled to control the tension, that is, to control the elongation of the mold, there is no need for a complicated mechanism, and the control mechanism required for tension control becomes easy. As for the cylinder, a double-acting type cylinder is suitably used. In order to effectively peel off the polymer film 14 from the surface of the mold 11, after stretching the mold 11, perform one or multiple stretching actions to shrink below 100% up to more than 300%. Since the air cylinder can repeat the expansion and contraction movement at high speed, it performs extremely efficient peeling.

The material of the tension adjustment roller 55 can be selected from either metal or non-metal, but it is preferable to select a material that reduces friction with the mold 11 . In addition, the surface roughness is preferably one in which the arithmetic average roughness Ra defined in JIS B 0601 (2001 edition) is 1.6 μm or less. When Ra is 1.6 μm or less, there is no fear that the surface shape of the tension adjustment roller 55 may be transferred to the back surface of the mold 11 when tension is applied.

The processing accuracy of the nip rollers 53, 54 and the drive rollers 23, 24 is preferably such that the cylindricity tolerance defined by JIS B 0621 (1984 edition) is 0.03 mm or less, and the circumferential deflection tolerance is 0.03 mm or less. When each is 0.03mm or less, there is no partial gap between the driving rollers 23, 24 and the nip rollers 53, 54 during nip pressing, and the laminated body of the mold 11 and the polymer film 14 can be uniformly formed in the width direction. The force is pressed, and the conveyance and tension control are smooth. In addition, the surface roughness of each roller is preferably one in which the arithmetic mean roughness Ra defined in JIS B 0601 (2001 edition) is 1.6 μm or less. When Ra is 1.6 μm or less, there is no fear that the surface shape of each roller may be transferred to the surface of the polymer film 14 or the back surface of the mold 11 during pressing.

Although the materials of the nip rollers 53, 54 and the drive rollers 23, 24 can also be selected from either metal or non-metal, in the case of non-metal, for example, in the case of using rubber, silicone rubber, EPDM (three Ethylene propylene rubber; Ethylene Propylene Diene rubber), neoprene rubber (neoprene rubber), CSM (chlorosulfonated polyethylene rubber), urethane rubber, NBR (nitrile rubber), hard rubber (ebonite), etc. In the case where a higher elastic modulus and hardness are required, a hard pressure-resistant resin (such as polyester resin) with improved toughness can be used. Preferably, the rubber hardness of the elastomer is in the range of 70° to 97° according to ASTM D2240: 2005 (Shore durometer; Shore durometer). When the hardness is above 70°, the deformation of the elastic body will not become too large, because the pressure contact width with the polymer film 14 will not become too large, so excessive friction will not be generated at the polymer film 14. As a result, there is no fear that the polymer film 14 will be peeled off from the mold 11 . When the hardness is 97° or less, conversely, the deformation of the elastic body does not become too small, and moderate friction is generated at a moderate pressure contact width, so tension control and transportation can be performed.

The recovery unit 60 preferably includes one or more suction nozzles 61 connected to a negative pressure generating device 62 such as a vacuum pump. The form of the suction nozzle 61 is not particularly limited, but it is preferable to include a plurality of nozzles with small suction openings in order to efficiently suck the polymer film 16 at a fast flow rate. Furthermore, the path of the suction nozzle 61 and the negative pressure generating device 62 is preferably provided with a trapping material 63 for trapping the recovered polymer film 16 by suction. Although the shape of the collecting material 63 is not particularly limited, the pore diameter is smaller than the specific shape of the polymer film 16. In order to reduce pressure loss, it is preferable to use a collecting material with a high porosity. More specifically, it is preferable to use a membrane filter, a nonwoven filter, or the like.

Fig. 4 is a schematic cross-sectional view of another aspect of the production apparatus of the polymer thin film of the present invention. This polymer thin film manufacturing apparatus 70 further includes another coating unit 71 and a drying unit 75 between the drying unit 40 and the peeling unit 50 . After the polymer film 14 is formed on the mold 11 through the coating unit 30 and the drying unit 40 located on the upstream side of the conveying direction, the coating unit 71 and the drying unit 75 located on the downstream side of the conveying direction can be applied on the polymer film 14. Other polymer films 73 are laminated on top. At this time, the polymer material contained in the coating material 13 coated from the slit die 31 of the coating unit 30 located upstream in the conveying direction is coated with the polymer material contained in the coating material 13 coated from the slit die 72 of the coating unit 71 located downstream in the conveying direction. Different types of polymer materials contained in the coating material 74 can be used to obtain a laminate of polymer thin films made of different polymer materials. A set of coating units and drying units to be added is not particularly limited as long as it is added according to the number of polymer materials to be laminated. In addition, when three or more layers of polymer materials are laminated, the polymer materials of all the layers may be different types of polymer materials, or only the polymer materials of adjacent layers may be of different types. Polymer Materials.

Fig. 5 is a schematic cross-sectional view of yet another aspect of the production apparatus of the polymer thin film of the present invention. As shown in FIG. 5 , as far as the manufacturing device 80 of the polymer film is concerned, the mold 11 is not directly coated, but the coating substrate 83 coated with the coating material 13 is passed through the nip roll 33 and the driving roll 34. Pressing together with the mold 11 , the coating material 13 is transferred and coated on the surface of the mold 11 . That is, the coating unit 30 of the polymer film manufacturing apparatus 80 shown in FIG. , pinch roller 33 and drive roller 34 constitute. The coating substrate 83 unwound by the coating substrate unwinding roller 81 is coated with the coating material 13 by the slit die 31 on the surface opposite to the mold 11, and is driven together with the mold 11 by the nip roller 33. The roller 34 pinches and transfers the coating material 13 to the surface of the mold 11 . The coating substrate 83 after the coating material 13 has been transferred to the mold 11 is taken up by the coating substrate take-up roll 82 . On the top surface 15a of the convex part 15, the mold 11 that has the coating material 13 transferred is passed through the drying unit 40, and the polymer film 14 is peeled off by the peeling unit 50, and the polymer film 16 is recovered by the recycling unit 60, and the polymer film 16 is recovered by the winding unit 40. Roll 22 takes up. In the device shown in FIG. 5 , the coating material 13 can be prevented from flowing into the concave portion other than the top surface 15a of the convex portion 15 of the mold 11, and the polymer film 16 with the shape of the top surface 15a can be well transferred.

Fig. 6 is a schematic sectional view of another embodiment of the production apparatus of the polymer thin film of the present invention. As shown in FIG. 6 , in the production apparatus 90 of the polymer film 16 , the transfer of the mold 11 and the peeling of the polymer film 16 can be performed without applying friction from the nip rolls to the surface of the polymer film 16 . The drive roller 91 and the tension adjustment roller 92 are provided, and the suction roller is used to suck the surface opposite to the coated surface of the mold 11 to enable conveyance. In the peeling unit 50 , the conveying tension in the peeling section is cut off because the mold 11 is attracted by the drive roller 91 and the tension adjustment roller 92 . In terms of the tension adjustment mechanism, the tension adjustment roller 92 is driven and rotated at a rotation speed faster than that of the driving roller 91 driven and rotated by the transfer speed of the mold, so that the mold is held between the driving roller 91 and the tension adjustment roller 92. When tension is applied, the mold 11 expands by an elongation amount corresponding to the speed difference between the drive roller 91 and the tension adjustment roller 92 . In addition, even when the drive roller 91 and the tension adjustment roller 92 are driven and transported at the same speed, the mold 11 can also be extended by extending the distance between the drive roller 91 and the tension adjustment roller 92 during the conveyance of the mold 11. The mold 11 that has recovered the polymer film 16 by the recycling unit 60 passes through the tension adjustment roller 92, receives the conveying tension from the take-up roller 22 again, and is taken up by the take-up roller 22 while following the guide rollers 22a and 22b. Pick. With regard to the device shown in Fig. 6, since conveyance, tension cut-off, and mold expansion and contraction can be carried out without imparting friction to the surface of the polymer film 16, it is possible to prevent the friction caused by friction with the roller when the mold expands and contracts. The damage of the polymer film 16 and the collapse of the shape.

Here, a method for producing the roll-shaped stretchable mold 11 will be described with reference to FIGS. 7 and 8 . In the case where the material of the mold 11 is a thermosetting resin, for example, it can be manufactured by going through the process of the mold manufacturing apparatus 100 shown in FIG. 7 . FIG. 7 is a cross-sectional view showing an example of an apparatus for manufacturing a roller-shaped mold 11 made of thermosetting resin using an endless belt-shaped mold 101 .

In the example shown in FIG. 7 , a coating unit 130 is used to apply a thermosetting resin to the surface of an endless belt-shaped mold 101 that is suspended on the first heating roller 110 and the second heating roller 120 and is conveyed while being heated. 102. The coated thermosetting resin 102 is pinched by the nip roller 140, and is in close contact with the substrate 103 supplied from the coating surface side of the thermosetting resin 102, and the surface is transferred with the uneven surface structure of the mold 101. Reverse construction. After that, it is transported while being kept in close contact with the mold 101, and thermal hardening is accelerated by heating. After the thermosetting resin 102 is completely cured, the laminate 104 of the thermosetting resin 102 and the base material 103 is peeled off from the mold 101 by the peeling roller 150 . By peeling off the laminated body 104 again at the lamination interface, the base material 103 is directed toward the take-up roll 160 and the mold 11 made of thermosetting resin is wound up toward the take-up roll 170 respectively. Through such a process, a roll-shaped mold 11 made of thermosetting resin is obtained.

Also, when the material of the stretchable mold 11 is a thermoplastic film, for example, it can be manufactured through the process of the mold manufacturing apparatus 200 shown in FIG. 8 . FIG. 8 is a cross-sectional view showing an example of an apparatus for manufacturing a roll-shaped mold 11 made of a thermoplastic film using an endless belt-shaped mold 201 .

In the example shown in FIG. 8 , the film 202 is pulled out from the unwinding roll 210 and supplied onto the surface of an endless belt-shaped mold 201 having a surface structure heated by a heating roll 220 . The surface structure of the mold 201 is formed with a concavo-convex structure in which the surface structure of the mold 11 has been reversed. The mold 201 is heated by a heating roller 220 just before contact with the film. The continuously supplied film 202 is pressed against the surface structure of the mold 201 by the nip roll 221 , and the reverse structure of the surface structure of the mold 201 is formed on the film 202 .

Thereafter, the film 202 is conveyed to the outer surface position of the cooling roll 230 in a state of being in close contact with the mold 201 . The film 202 is removed from the mold 201 by the peeling roller 240 after being cooled by the heat transfer through the mold 201 by the cooling roller 230 , and is taken up by the take-up roller 250 serving as the mold 11 . Through such a manufacturing process, a roll-shaped mold 11 made of thermoplastic film is obtained.

Next, the method for manufacturing the polymer film with a specific shape according to the present invention will be described. The method for producing a polymer film with a specific shape according to the present invention is to manufacture a polymer film with a specific shape by the following method, which is characterized by comprising: conveying a stretchable mold, the mold has unevenness on the surface and its The shape of the top surface of the convex portion is the above-mentioned specific shape; the coating material containing the polymer material is applied to the surface on which the aforementioned unevenness is formed in such a manner as to cover the top surface of the aforementioned convex portion of the conveyed mold; The coated polymer material is dried to form a polymer film; secondly, the aforementioned mold is stretched or contracted more than once, and the dried aforementioned polymer film is peeled off from the top surface of the aforementioned convex portion to obtain a polymer film, which is recycled. The aforementioned polymer film having a specific shape peeled from the aforementioned mold.

Next, a method of manufacturing the polymer thin film 16 will be described with reference to FIGS. 1 and 9 . In the preparatory stage, the coating material 13 containing the polymer material is prepared and filled in the groove of the coating material supply means connected to the slit die 31 in advance. Again, the mold 11 is pulled out from the unwinding roller 21, passes through the coating unit 30, the drying unit 40 along the guide roller 21a, passes through the stripping unit 50, the recovery unit 60 along the guide roller 25, and then passes along the guide roller 26, 22a and being wound up by the winding roller 22. At this time, the mold 11 is given a certain tension required for conveyance by the mold supply means 20 . Also, the distance between the discharge front end surface of the slit die 31 and the surface of the mold 11 is set at a predetermined distance, so that the liquid feeding conditions of the coating material 13 and the conditions corresponding to the film thickness are set in advance as the coating material supply means. The drying unit 40 is heated at a constant temperature by heating means not shown.

Next, the driving rollers 23 and 24 are driven, and the nip roller 53 and the driving roller 23 and the nip roller 54 and the driving roller 24 press the mold 11 through the mold 11 to convey the mold 11 at a constant speed. The coating material supply means of the coating unit 30 is activated to start feeding the coating material 13 . The polymer material-containing coating material 13 discharged from the discharge port of the slit die 31 is uniformly applied to the top surface 15 a of the convex portion 15 on the surface of the mold 11 , and then conveyed toward the drying unit 40 . In the process of passing through the drying unit 40, the solvent remaining in the coating material 13 is slowly volatilized, and when the volatilization of the solvent is completed, the polymer material of a specific shape becomes a film laminated on the top surface 15a of the convex portion 15 of the mold 11 state. Next, the mold 11 formed with the polymer film 14 is conveyed toward the peeling unit 50, and enters two sets of roller pairs of the nip roller 53 and the driving roller 23, and the nip roller 54 and the driving roller 24, which belong to the tension cutting mechanism. Separately press the peeling section where the conveying tension has been cut off. Tension is applied to the mold 11 from the opposite side of the coating surface of the mold 11 by the tension adjustment roller 55 which is a tension adjustment mechanism, and the mold 11 is elongated so as to have an elongation rate of 300% or more than that before the tension is applied. Here, the polymer film 14 is laminated on the surface of the mold 11 after the tension is cut off by the tension cut-off mechanism so as to cover the protrusions 15 ( FIG. 9( a )). On the surface of the mold 11 stretched by the tension adjustment roller 55, the polymer film 14 that cannot follow the elongation of the mold 11 floats, and the polymer film 16 is peeled off ( FIG. 9( b )). The polymer film 16 peeled off from the mold 11 is sucked by the suction nozzle 61 of the negative pressure generating device 62 connected to the recovery unit 60, and recovered by the collecting material 63 provided in the suction path. The mold 11 from which the polymer film 16 has been peeled off passes through the nip roller 54 , receives the transport tension from the mold supply means 20 again, and is wound up toward the take-up roller 22 .

烷酮、聚己內酯等之聚酯系樹脂、聚乙二醇等之聚醚系樹脂、聚甲基丙烯酸乙酯、聚甲基丙烯酸甲酯、聚甲基丙烯酸羥乙酯等之聚甲基丙烯酸酯系樹脂、乙酸纖維素、藻酸、幾丁聚糖等之多糖類或多糖類酯、聚乙酸乙烯酯、聚乙烯醇、聚乙烯吡咯啶酮等之聚乙烯系樹脂等的均聚物及/或含有至少含有1種以上的高分子的共聚物之高分子，從經濟性的觀點更佳為聚乳酸、聚乙醇酸、聚二

烷酮、聚己內酯、聚乙二醇、聚甲基丙烯酸甲酯及其共聚物。關於塗料等之產業用的用途，未必需要生物降解性，例如，亦可適當使用聚對酞酸乙二酯、聚2,6-萘二甲酸乙二酯、聚對酞酸丙二酯(Polypropylene terephthalate,PPT)、聚對酞酸丁二酯等之聚酯系樹脂、聚乙烯、聚苯乙烯、聚丙烯、聚異丁烯、聚丁烯、聚甲基戊烯等之聚烯烴系樹脂、聚醯胺系樹脂、聚醯亞胺系樹脂聚醚系樹脂、聚酯醯胺系樹脂、聚醚酯系樹脂、丙烯酸系樹脂、聚碳酸酯系樹脂、或聚氯乙烯系樹脂等。 The polymer material used as the polymer film 16 is not particularly limited, but the polymer film 16 can be peeled off from the mold 11 by utilizing the difference in stretching and breaking rate between the polymer material and the mold 11 . The tensile fracture rate of the polymer material is preferably less than 100%, more preferably less than 50%. Furthermore, as far as the polymer film 16 used in medical products, cosmetics, etc. is concerned, it is preferably a biodegradable one, specifically, it is preferably selected from polylactic acid, polyglycolic acid, poly

Polyester resins such as alkanone and polycaprolactone, polyether resins such as polyethylene glycol, polymethacrylate such as polyethyl methacrylate, polymethyl methacrylate, and polyhydroxyethyl methacrylate Homopolymerization of acrylate resins, polysaccharides such as cellulose acetate, alginic acid, chitosan, etc. or polysaccharide esters, polyvinyl acetate, polyvinyl alcohol, polyvinylpyrrolidone, etc., polyvinyl resins, etc. Polymers and/or polymers containing at least one polymer copolymer, more preferably polylactic acid, polyglycolic acid, polydiglycolic acid from the economic point of view

Alkanones, polycaprolactones, polyethylene glycols, polymethylmethacrylates and their copolymers. For industrial applications such as coatings, biodegradability is not necessarily required. For example, polyethylene terephthalate, polyethylene 2,6-naphthalate, and polypropylene terephthalate (Polypropylene terephthalate) can also be used appropriately. terephthalate, PPT), polyester resins such as polybutylene terephthalate, polyolefin resins such as polyethylene, polystyrene, polypropylene, polyisobutylene, polybutene, and polymethylpentene, polyamide Amine resin, polyimide resin, polyether resin, polyester amide resin, polyether ester resin, acrylic resin, polycarbonate resin, or polyvinyl chloride resin.

Fig. 10 shows an example of the form of a polymer thin film having a specific shape produced by the production method of the present invention and the like. Fig. 10(a) is a scanning electron microscope photograph after cutting out a region of the laminate of the polymer film 16 and the mold 11. The polymer film 16 is uniformly coated on the top surface 15a of the convex part 15 of the mold 11, and the specific shape of the top surface 15a is accurately transferred. Fig. 10(b) is a scanning electron microscope photograph of a region of the laminate of the polymer film 16 and the mold 11 after the mold 11 has stretched and stretched. The polymer film 16 formed in a specific shape is peeled off from the surface of the mold by the expansion and contraction of the mold 11 .

Although the specific shape of the polymer film 16 of the present invention is not particularly limited, it is preferably any one of a circle, an ellipse, and a polygon in terms of graphics projected on a two-dimensional plane in a manner that maximizes the area of the specific shape. By. In addition, it is not necessary to be geometrically complete, and it is only necessary to be similar to each shape, so any one of a substantially circular shape, a substantially elliptical shape, and a substantially polygonal shape is also preferable. From the viewpoint of the ease of overlapping of the polymer thin films 16, a circular shape, a substantially circular shape, or a polygonal shape, and a substantially polygonal shape are more preferable.

The polymer film 16 with a specific shape obtained by the present invention is usually made into a tiny flat shape called a flake (flake) shape, a disc (disk) shape, etc. When the thin films 16 overlap each other, the adhesive force between the polymer thin films 16 can be strengthened, and the aggregate of the polymer thin films 16 can maintain a stable shape without being damaged when an external force is applied. Furthermore, since each is a thin film, it is also excellent in followability and adhesion to skin, internal organs, and the like.

Because of such effects, the polymer film 16 with a specific shape obtained by the present invention is suitable for use in medical applications such as biodegradable internal wound coverings, external wound coverings, and anti-adhesive materials. Films, skin care products, and cosmetic materials using micro-film shapes, such as skin external materials, require a micron-sized size and a nano-sized thickness.

[Example] [Example 1]

The material of the flexible drum-shaped mold 11 is to use two-component hardened polysiloxane rubber (trade name RBL-9101-05, manufactured by Dow Corning Toray Co., Ltd.), mix the two components and stir Degasser. The formation of the uneven surface structure uses a device that presses a mold against the surface of the thermosetting resin shown in FIG. 7 to form a shape. The concave-convex structure of the surface of the mold 11 is that the specific shape of the top surface 15a of the convex portion 15 is a square with a length of 80 μm on one side, and the columnar protrusions of the convex portion 15 with a height of 50 μm are arranged in the closest packing with the width of the concave portion of 20 μm. way to configure. A roll-shaped mold 11 was produced such that the width of the mold 11 was 300 mm and the length of the mold 11 was 300 m, and the mold 11 was installed so that the produced mold 11 could be transported to the apparatus shown in FIG. 1 .

For the coating material 13, polylactic acid (manufactured by Wako Pure Chemical Co., Ltd.) which is a polymer material is dissolved in ethyl acetate (CAS No. 141-78-6 manufactured by Wako Pure Chemical Co., Ltd.) Furthermore, the concentration of polylactic acid to the entire coating material 13 is adjusted to be 2.5% by mass.

Mold 11 is conveyed with unwinding tension 10N, winding tension 10N and conveying speed 3m/min, in coating unit 30, use discharge width is 290mm, and slit width is the slit die 31 of 100 μ m, with slit die The distance between 31 and the surface of the mold 11 was set to 100 μm, and the coating material 13 was applied at a discharge speed at which the film thickness of the dried polymer film 14 became 150 nm at this conveying speed.

The drying unit 40 utilizes high volatility of ethyl acetate, and uses a drying space whose temperature is adjusted so that it becomes constant at 40°C.

In the peeling unit 50, the mold 11 is pressed against the pressure of 0.2 MPa by the nip roller 53 and the driving roller 23, and the nip roller 54 and the driving roller 24, and the tension applied to the mold 11 in the peeling section is set to Roughly 0N. When the tension applied to the mold 11 becomes approximately 0N, the rotatable tension adjustment roller 55 , which is a tension adjustment mechanism connected to the tip of a rod connected to an air cylinder, is pushed against the surface of the mold 11 opposite to the coating surface. The stroke of the air cylinder was adjusted so that the elongation of the mold in the peeling zone became 300%, and the length of the mold 11 in the peeling zone was extended from 200 mm to 600 mm.

By stretching the mold 11, the polymer film 16 peeled off from the surface of the mold 11 is recovered by the suction nozzle of the recovery unit 60, and the collection material is collected between the suction nozzle 61 and a negative pressure generating device 62 such as a vacuum pump. 63 non-woven fabric filter (trade name FS6200, manufactured by JAPAN VILENE COMPANY, LTD.).

As a result of observing the captured polymer film 16, it was confirmed that the polymer film 16 was formed in substantially the same shape as the top surface 15a of the mold 11. FIG. 11 shows the result of observing the surface of the polymer thin film 16 having a specific shape obtained in Example 1 with a scanning electron microscope.

[Example 2]

The material of the stretchable roll-shaped mold 11 and the coating material 13 are the same as those described in Example 1. The concave-convex structure of the surface of the mold 11 is a regular hexagon with a diagonal length of 100 μm in the specific shape of the top surface 15a of the convex portion 15, and a columnar protrusion with a height of 50 μm in the concave portion. Configure in the way of dense filling configuration. The roll-shaped mold 11 was produced so that the width of the mold 11 would be 300 mm, and the length of the mold 11 would be 300 m. The coating substrate 83 is a 100 μm-thick film made of biaxially stretched polyethylene terephthalate (trade name “Lumirror” (registered trademark), S10, manufactured by Toray Industries, Inc.) with a width of 300 mm. , The length is set to 300m. It is installed so that the mold 11 and the coating base material 83 can be conveyed to the apparatus shown in FIG. 5 .

Mold 11 is transported with unwinding tension 10N, coiling tension 10N and transport speed 3m/min, and coating substrate 83 is transported with unwinding tension 30N, coiling tension 30N and transport speed 3m/min. As for the coating unit 30, a slit die 31 with a discharge width of 290 mm and a slit width of 100 μm was used, and the distance between the slit die 31 and the surface of the coating substrate 83 was set to 100 μm. The coating material was coated at a discharge rate of 150 nm with a film thickness of the molecular material.

The driving roller 34 and the nip roller 33 were pinched at a pressure of 0.2 MPa so that the top surface 15a of the convex portion 15 of the mold 11 was in contact with the coating surface of the coating material 13 of the coating substrate 83 .

The drying unit 40 utilizes high volatility of ethyl acetate, and uses a drying space whose temperature is adjusted so that it becomes constant at 40°C.

In the peeling unit 50, the mold 11 is pressed against the pressure of 0.2 MPa by the nip roller 53 and the driving roller 23, and the nip roller 54 and the driving roller 24, and the tension applied to the mold 11 in the peeling section is set to Roughly 0N. When the tension applied to the mold 11 becomes approximately 0N, the rotatable tension adjustment roller 55 , which is a tension adjustment mechanism connected to the tip of a rod connected to an air cylinder, is pushed against the surface of the mold 11 opposite to the coating surface. The stroke of the air cylinder was adjusted so that the elongation of the mold in the peeling zone became 300%, and the length of the mold 11 in the peeling zone was extended from 200 mm to 600 mm.

As the mold 11 is extended, the polymer film 16 peeled off from the surface of the mold 11 is recovered by the suction nozzle 61 of the recovery unit 60, and the suction nozzle 61 and the negative pressure generating device 62 such as a vacuum pump are used. A non-woven fabric filter (trade name FS6200, manufactured by JAPAN VILENE COMPANY, LTD.) of 63 aggregates was used for collection.

As a result of observation of the captured polymer film 16, it was confirmed that the polymer film 16 was formed in substantially the same shape as the top surface 15a of the mold 11. FIG. 12 shows the result of observing the surface of the polymer thin film 16 having a specific shape obtained in Example 2 with a scanning electron microscope.

[Industrial availability]

The polymer film obtained by the manufacturing device and manufacturing method of the polymer film having a specific shape of the present invention exhibits high followability to the adherend and accumulates by overlapping each other, and can form a polymer film showing high adhesion and stability. sex film. For example, it is most suitable for hemostasis during surgery, wound dressing materials, anti-adhesion materials, cosmetic materials, percutaneous absorption materials, and the like. Moreover, it can also be used as a coating agent etc. by disperse|distributing in an aqueous medium.

10‧‧‧Production equipment of polymer film

11‧‧‧Moulding

13‧‧‧Coating materials

14‧‧‧polymer film

16‧‧‧polymer film

20‧‧‧Mould supply means

21‧‧‧Unwinding roller

21a, 22a, 25, 26‧‧‧guide roller

22‧‧‧Take-up roller

23, 24‧‧‧Drive roller

27‧‧‧Controller

28‧‧‧End detection sensor

30‧‧‧coating unit

31‧‧‧Slot die

32‧‧‧Support roller

40‧‧‧drying unit

50‧‧‧Peeling unit

53, 54‧‧‧Pinch roller

55‧‧‧Tension adjustment roller

60‧‧‧recycling unit

61‧‧‧Suction nozzle

62‧‧‧Negative pressure generating device

63‧‧‧Trapping materials

Claims (9)

A polymer film manufacturing device is a manufacturing device for manufacturing a polymer film with a specific shape, comprising: a stretchable mold, the surface of which is formed with concavities and convexities, and the shape of the top surface of the convex part is the aforementioned specific shape; The supply means supplies and conveys the mold; the coating unit coats the surface on which the unevenness is formed with a polymer material in such a manner as to cover the top surfaces of the plurality of protrusions of the mold conveyed by the mold supply means. The coating material; the drying unit is located on the downstream side of the conveying direction than the coating unit, and the coated coating material is dried to form an outer shape on each of the top surfaces of the plurality of protrusions. The polymer film of a specific shape; the peeling unit is located on the downstream side of the drying unit in the conveying direction, and the polymer film is peeled from the top surface of the convex part by extending or contracting the mold more than once. To obtain a plurality of polymer films whose external shape has a specific shape of the top surface of the convex part; and a recovery unit that recovers a plurality of the specific shape of the external shape that has the top surface of the convex part peeled off from the top surface of the convex part. The aforementioned polymer film. The apparatus for producing a polymer film according to claim 1, wherein the peeling unit is configured so as not to contact the polymer film attached to the top surface of the protrusion of the mold. The manufacturing device of the polymer film as claimed in item 1, wherein The expansion and rupture rate of the above-mentioned mold is more than 300%. The polymer film manufacturing device according to claim 1, wherein the recovery rate of the mold after being stretched to an elongation rate of 300% is more than 95%. The apparatus for producing a polymer film according to claim 1, wherein the shape of the top surface of the aforementioned convex part of the mold is circular or polygonal, and when viewed from the surface on which the aforementioned unevenness is formed, the shape of the aforementioned circular or the aforementioned The aforementioned unevenness is formed in such a manner that the polygons are formed in a closest-packed arrangement. The polymer film manufacturing apparatus as claimed in claim 1, wherein between the aforementioned drying unit and the aforementioned peeling unit, there is further a combination of at least one coating unit and drying unit, and each combined coating unit is used in the conveying direction A coating material containing a polymer material different from that of the polymer film is coated on the polymer film formed by the drying unit on the upstream side. The polymer film manufacturing apparatus according to any one of claims 1 to 6, wherein the peeling unit includes a tension adjustment mechanism for stretching and contracting the mold. A method of manufacturing a polymer film, which is a method of manufacturing a polymer film having a specific shape, wherein a stretchable mold is conveyed, the mold has concavities and convexities formed on the surface, and the shape of the top surface of the convex portion is the specified shape. shape, to cover one of the top surfaces of the plurality of convex parts of the conveyed mold The polymer material is coated on the surface on which the above-mentioned unevenness is formed, and then the coated polymer material is dried to form an outer shape on each of the top surfaces of the aforementioned plurality of convex parts. The shape has the specific characteristics of the top surface. The shape of the polymer film, secondly, the above-mentioned mold is stretched or contracted more than once, and the dried above-mentioned polymer film is peeled off from the top surface of the aforementioned convex part to obtain the shape of the outer shape having a specific shape of the top surface of the convex part The plurality of polymer films, the plurality of polymer films peeled from the mold and having a specific shape of the top surface of the convex part are recovered. The method for producing a polymer film according to claim 8, wherein the polymer film is peeled off from the top surface of the protrusion without being in contact with the polymer film attached to the top surface of the protrusion of the mold. .

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