TW202202341A - Release film roll, production method therefor, ceramic component sheet, production method therefor, ceramic component, and production method therefor - Google Patents

Abstract

Provided is a production method for a release film roll, said production method comprising a winding step in which a separation film is wound onto a winding roller while pressing a contact roller to the winding roller, wherein during the winding step, the release film is wound while rotationally driving the contact roller. Also provided is a production method for a ceramic component sheet, said production method comprising a step in which a paste that includes a ceramic powder is used to form a ceramic green sheet on a surface of a release layer of the release film, which has been drawn from the release film roll obtained via the abovementioned production method.

Description

Release film roll and its manufacturing method, ceramic parts sheet and its manufacturing method, and ceramic parts and its manufacturing method

The present disclosure relates to a release film roll and its manufacturing method, a ceramic part sheet and its manufacturing method, and a ceramic part and its manufacturing method.

In recent years, with the requirement of miniaturization of electronic machines, electronic components are also gradually miniaturized. One of the electronic parts, namely ceramic parts, has been miniaturized year by year. For example, a multilayer ceramic capacitor, which is one of the ceramic parts, has reduced the thickness of the dielectric layer and the internal electrodes, and has sought to increase the capacitance. A general multilayer ceramic capacitor is manufactured by using a release film as a carrier film, forming a dielectric layer and an internal electrode on the carrier film as a green sheet, peeling off the green sheet, and laminating.

When the thickness of the dielectric layer of the multilayer ceramic capacitor becomes thinner, the withstand voltage performance, which is a problem such as short circuit, tends to decrease. In particular, when the thickness of the dielectric layer is non-uniform, the thinner portion may be a cause of lowering the withstand voltage performance. The multilayer ceramic capacitor having the dielectric layer having such a thin portion has poor withstand voltage, and the yield of the multilayer ceramic capacitor decreases. On the other hand, if the thickness of the dielectric layer is uniform, the withstand voltage performance is good, and the yield of the multilayer ceramic capacitor is improved.

Damage or the like in the release film used as the carrier film for the dielectric layer is a factor for the thickness variation of the dielectric layer. In addition, the smoothness of the surface of the release film affects the thickness uniformity of the dielectric layer. In view of such a situation, for example, in Patent Document 1, a release film roll that can smooth the release film and reduce the thickness unevenness of the dielectric layer is considered. [Prior Art Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open No. 2011-206995

[Problems to be Solved by Invention]

In the manufacturing step of the ceramic part, a ceramic green sheet is formed on the surface of the release layer of the release film drawn from the release film roll. Here, as a measure for improving the productivity of ceramic parts, it is considered to be effective to lengthen the winding length of the release film wound around the release film roll and reduce the frequency of replacement of the release film roll.

On the other hand, when the smoothed release film is wound around the core, there is a tendency that the air between the adjacent release films does not easily escape. If there is unevenness in air escape, eccentricity will occur, and the quality of the wound state of the release film will decrease. In order to improve the quality of the winding state, it is necessary to suppress the occurrence of winding deviation and the like, so it is necessary to increase the tension of the release film during winding. In order to maintain a large tension of the release film during winding, the diameter of the winding roll becomes larger as the winding progresses, and it is necessary to increase the torque of the winding shaft. However, if the torque of the reel is increased and the tension during winding is excessively increased, the protrusions on the surface of the core and the shape of the filler contained in the release film may be transferred to the release film, and the release layer of the release film may be transferred to the release film. The surface (peeling surface) may be uneven and deformed. In order to suppress such shape transfer, the release film needs to be wound with a relatively low tension. In view of such a matter, if the winding length of the release film becomes longer, it becomes difficult to achieve both the quality of the winding state and the reduction of unevenness and deformation of the release film only by the torque control of the reel.

Therefore, the present disclosure provides a release film roll with high quality in a wound state and capable of sufficiently reducing unevenness and deformation on the surface of the release film, and a manufacturing method thereof. Furthermore, the present disclosure provides a ceramic component sheet having excellent reliability by using such a release film roll, and a method for producing the same. Furthermore, the present disclosure provides a ceramic component having excellent reliability by using such a ceramic component sheet, and a manufacturing method thereof. [Technical means to solve problems]

The manufacturing method of the release film roll of the present disclosure includes a winding step in which the release film is wound on the winding roll while pressing the touch roll against the winding roll, and in the winding step, the touch roll is rotated and driven while the roll is wound and peeled off. membrane. A conveyance roller can be used for conveyance of the release film. In addition, the winding roll refers to the film roll in the state in which the film including the release film was wound on the core.

In the above-mentioned production method, in the winding step, the release film is wound around the winding roll while the touch roll is pressed against the winding roll, and the touch roll is rotationally driven. By the pressing and rotational driving of the contact roller, the air escape between the wound release films can be promoted. Thereby, the torque of the winding roll can be reduced, the transfer of the uneven shape in the release film can be suppressed, and the occurrence of winding offset can be suppressed. Therefore, it is possible to manufacture a release film roll with high quality in a wound state and sufficiently reduced unevenness and deformation on the surface of the release film.

In the above-mentioned manufacturing method, in the winding step, the thickness of the release film is F[m], the width of the release film is W[m], and the torque of the reel that rotates and drives the winding roll is T[N] ·m], the value of T/(F·W) can be maintained within the range of 70,000 to 420,000 N/m.

If the value of T/(F·W) is set to the above range, the unevenness due to transfer can be reduced sufficiently, but when the release film is wound, there is a A force acts on the release film wound to the inner side, and the so-called winding offset is shifted in a direction orthogonal to the winding direction. In the said winding process, since a touch roll presses a peeling film and drives it to rotate, even if the value of T/(F·W) is set to the said range, generation|occurrence|production of a winding misalignment can be suppressed. As a result, the transfer of the uneven shape in the release film and the occurrence of winding offset can be further suppressed. Therefore, it is possible to manufacture a roll of the release film which has a sufficiently high quality in the wound state, and further reduces the unevenness and deformation of the surface of the release film.

In the above-mentioned manufacturing method, in the winding step, the maximum value of the torque T[N·m] of the reel for rotationally driving the winding reel is set to T _max [N·m], and the minimum value is set to T _min [N·m] m], and the following formulae (1) and (2) may be satisfied when 1/2 of the sum of the above-mentioned maximum value and the above-mentioned minimum value is set to T _ave [N·m]. T _max ≦1.2×T _ave (1) T _min ≧0.8×T _ave (2)

By satisfying the above equations (1) and (2), the torque fluctuation of the reel can be reduced. Thereby, it can fully suppress that the tension|tensile_strength of the wound release film changes rapidly, the winding position of a winding roll is shifted, and wrinkles generate|occur|produce.

The said manufacturing method may include the conveyance process of conveying a release film using a conveyance roll, and the cutting process of cutting|disconnecting a release film in a longitudinal direction. Before cutting the release film, the release film can be pinched by a nip roll and a conveyance roll. A specific tension can be given to the cut release film by pinching the release film between the nip roll and the conveyance roll. Thereby, the cutting step can be performed smoothly, and the shape of the cut portion of the release film can be adjusted with high precision.

The release film roll of one aspect of this disclosure is obtained by any of the above-mentioned manufacturing methods. Since the roll of the release film is obtained by any of the above-mentioned manufacturing methods, the quality of the rolled state is high, and the unevenness and deformation of the surface of the release film are sufficiently reduced.

A method of manufacturing a ceramic part sheet according to an aspect of the present disclosure includes the steps of forming a ceramic green sheet using a paste containing ceramic powder on the surface of the release layer of the release film drawn from any of the above-mentioned release film rolls.

The above-mentioned production method uses the release film drawn from any of the above-mentioned release film rolls. The said release film roll can fully suppress the generation|occurence|production of damage to the surface of a release film by winding deviation, and generation of unevenness|corrugation to the surface of a release film by transcription|transfer. Therefore, a ceramic green sheet with sufficiently reduced thickness variation and pinholes can be formed over a wide area from the front end to the rear end of the release film wound on the release film roll. Therefore, a ceramic component sheet excellent in reliability can be produced. In the present disclosure, the "rear end" of the release film refers to an end on the side that is in contact with the roll core, and the "front end" of the release film refers to an end on the side that appears on the outer peripheral surface of the release film roll.

A method of manufacturing a ceramic part according to one aspect of the present disclosure includes the steps of: obtaining a laminate including a ceramic green sheet using the ceramic part sheet obtained by the above-described manufacturing method; and firing the laminate to obtain a sintered body.

In the above-mentioned production method, a ceramic part is produced using a release film that sufficiently suppresses surface irregularities and thickness fluctuations due to winding offset and transfer. Thereby, a ceramic green sheet with sufficiently reduced thickness variation and pinholes can be formed. Therefore, a ceramic part excellent in reliability can be manufactured.

The ceramic part sheet of one aspect of the present disclosure can be obtained by forming a green sheet including a ceramic green sheet on the surface of the release layer of the release film drawn from any of the above-mentioned release film rolls.

The above-mentioned ceramic component sheet was obtained using the release film drawn out from any of the above-mentioned release film rolls. The release layer of the above-mentioned release film has sufficiently suppressed surface unevenness and deformation due to winding offset and transfer. Therefore, thickness variation and pinholes of the ceramic green sheet can be sufficiently reduced. A ceramic part sheet obtained by forming a green sheet including such a ceramic green sheet has excellent reliability.

A ceramic component of one aspect of the present disclosure includes a sintered body obtained by forming a layered body of ceramic green sheets including the ceramic component sheet, and firing the layered body. The thickness variation and pinholes of the above-mentioned ceramic green sheets have been sufficiently reduced. The above-mentioned ceramic component is excellent in reliability because it includes a sintered body obtained by sintering a layered body including such a ceramic green sheet. [Effect of invention]

According to the present disclosure, even if the winding length of the release film is increased, the quality of the wound state is high, and the unevenness and deformation of the surface of the release film can be sufficiently reduced, and a release film roll and a manufacturing method thereof can be provided. Moreover, by using such a peeling film roll, the ceramic component sheet which has excellent reliability, and its manufacturing method can be provided. Furthermore, by using such a ceramic component sheet, a ceramic component sheet having excellent reliability and a method for producing the same can be provided.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings depending on the circumstances. In each drawing, the same or equivalent elements are marked with the same symbols, and repeated explanations are omitted depending on the situation. However, the following embodiments are examples for explaining the present disclosure, and are not intended to limit the present disclosure to the following contents.

Fig. 1 is a perspective view of a release film roll according to an embodiment. The release film roll 100 of FIG. 1 is provided with the release film 20 which has a base material film and a release layer, and the core 10 with which the release film 20 was wound. The release film 20 is used as a carrier film in, for example, a manufacturing process of ceramic parts including a multilayer ceramic capacitor. In this production step, for example, by coating or printing on a release film, a ceramic green sheet to be a dielectric green sheet and an electrode green sheet to be an internal electrode are formed, and then these are peeled off They are laminated, and the laminated body is fired to produce ceramic parts. The release film 20 is used by being pulled out from the release film roll 100 .

Examples of the material of the core 10 include paper, plastic, metal, and the like. In the manufacture of ceramic parts, since the particles may cause pinholes, it is preferable to include a lightweight plastic that does not generate paper dust. As such a material, ABS resin, phenol resin, fiber-reinforced plastic, etc. are mentioned. Fiber-reinforced plastics can be preferably used because they have flexibility in addition to higher mechanical strength. Examples of fiber-reinforced plastics include fibers reinforced with thermosetting resins. As resin, epoxy resin, unsaturated polyester resin, etc. are mentioned. As fiber, glass fiber, aramid fiber, etc. are mentioned. In consideration of cost and the like, the resin may be an unsaturated polyester resin. From the same viewpoint, the fibers may be glass fibers.

The outer diameter of the core 10 may be 150 mm or less, or 100 mm or less. Thereby, the size of the peeling film roll 100 can be reduced, and the installation space and transportation cost can be reduced.

The winding length of the release film 20 wound around the core 10 may be 4000 m or more, 5000 m or more, or 6000 m or more. Thereby, in the manufacturing steps of ceramic green sheets and ceramic parts, etc., the replacement frequency of the peeling film roll 100 can be reduced, thereby improving the production efficiency of various products. The thickness of the peeling film 20 may be 10-110 μm, or 20-60 μm. The width of the release film 20 may be, for example, 0.1 to 2 m. In addition, in the present disclosure, the direction in which the release film is conveyed when the release film is drawn and wound is referred to as the longitudinal direction, and the direction orthogonal to the longitudinal direction of the release film is referred to as the width direction of the release film.

FIG. 2 is a cross-sectional view showing an example of a release film. The release film 20 has a base film 22 and a release layer 24 on one side thereof. The base film 22 may be a synthetic resin film. Examples of synthetic resins include polyolefin resins such as polyester resins, polypropylene resins, and polyethylene resins, acrylic resins such as polylactic acid resins, polycarbonate resins, and polymethyl methacrylate resins, polystyrene resins, and polyamide resins such as nylon. Amide resin, polyvinyl chloride resin, polyurethane resin, fluorine resin, polyphenylene sulfide resin, etc. Among them, polyester resins are preferred. Among the polyester resins, polyethylene terephthalate (PET) is more preferred from the viewpoints of mechanical properties, transparency, cost, and the like.

The thickness of the base film 22 is preferably 10 to 100 μm, more preferably 20 to 50 μm. When the thickness is less than 10 μm, the physical properties such as the dimensional stability of the release film 20 tend to be impaired. When the thickness exceeds 100 μm, the production cost per unit area of the release film 20 tends to increase.

From the viewpoint of sufficiently improving the mechanical strength of the release film 20, the base film 22 may contain a filler (filler) to such an extent that transparency is not impaired. In the release film roll 100 of the present embodiment, even if the base film 22 contains a filler, transfer of the shape of the filler to the release layer 24 of the release film 20 adjacent in the radial direction of the release film roll 100 can be sufficiently suppressed. The filler is not particularly limited, and examples thereof include calcium carbonate, calcium phosphate, silica, kaolin, talc, titanium oxide, fired silica, alumina, and organic particles.

The release layer 24 is formed by coating a solution containing a release agent on one surface of the base film 22, drying and curing it. The coating method is not particularly limited, as long as a reverse coating method, a gravure coating method, a bar coating method, a bar coating method, a Meyer bar coating method, a die coating method, a spray coating method, or the like is used. For drying, hot air drying, infrared drying, natural drying and the like can be used. In order to suppress moisture condensation during drying, heating is preferably performed, and it can be about 60 to 120°C.

As a release agent for forming the release layer 24, a silicone type release agent, a long-chain alkyl type release agent, a fluorine type release agent, and an amino alkyd resin type are mentioned, for example. Silicone-based release agents include addition reaction-based silicone release agents, condensation-type silicone release agents, and UV-curable release agents based on differences in curing reactions.

The curing conditions may be appropriately selected according to the curing system of the release agent. For example, if the release agent is an addition reaction type silicone, it can be hardened by heat treatment at 80-130°C for several tens of seconds. In the case of an ultraviolet curing system, a mercury lamp, a metal halide lamp, or the like can be used as a light source, and ultraviolet rays can be irradiated and cured. In the case of radical polymerization by irradiation with ultraviolet rays, it is preferable to perform curing in a nitrogen atmosphere in order to prevent oxygen inhibition. The thickness variation of the peeling layer 24 is preferably small.

The addition reaction-based silicone release agent reacts with hydrosiloxane to harden the polydimethylsiloxane with vinyl groups introduced into the terminal and/or side chain. Hardening can use platinum catalysts. For example, it can be hardened at a hardening temperature of about 100°C for several tens of seconds to several minutes. The thickness of the peeling layer 24 may also be about 50-300 nm. As the release agent of the addition reaction system, K847, KS847T, KS-776L, KS-776A, KS-841, KS-774, KS-3703T, KS-3601, etc., manufactured by Shin-Etsu Chemical Co., Ltd. (all are Product name).

The peeling layer 24 may be constituted by, for example, a (meth)acrylate component and a cured product of a (meth)acrylate modified silicone. Since such a cured product can be cured by ultraviolet rays, the thickness of the peeling layer 24 can be increased. Therefore, for example, when the base film 22 contains the filler, the protrusions due to the filler can be covered, and the surface (release surface) of the release layer 24 can be smoothed. In this case, the thickness of the peeling layer 24 may be 30 to 3000 nm.

It is also possible to use immiscible (meth)acrylate monomers and (meth)acrylate modified silicone oils. These are mixed with a reaction initiator in a solvent, and after apply|coating to the base film 22, the solvent is dried. In this way, the release layer 24 can also be formed by curing the silicone-modified silicone oil with ultraviolet rays in a state where the silicone-modified silicone oil is localized near the surface. As the (meth)acrylate-modified silicone oil, well-known ones can be used. For example, X-22-164A, X-22-164B, X-22-174DX, X-22-2445 (all are trade names) by Shin-Etsu Chemical Co., Ltd., etc. are mentioned.

The surface of the release layer 24 of the release film 20 is preferably smooth. Specifically, the surface roughness (Rp) of the peeling layer 24 is preferably 100 nm or less, more preferably 50 nm or less. The surface roughness (Rp) of the peeling layer 24 of the present embodiment is the maximum peak value specified in JIS B 0601-2001, and can be measured using a contact surface roughness meter or a scanning white interference microscope.

The manufacturing method of the release film roll 100 of one embodiment includes: a conveying step of conveying the release film using a conveying roller; a cutting step of cutting the release film in the longitudinal direction; and a winding step of pressing the touch roller on one side. A take-up roll, and the release film is wound on one side with a roll-up roll. The conveying step may be performed either or both before and after the cutting step.

3 : is a figure which shows an example of the manufacturing apparatus which performs the manufacturing method of the peeling film roll 100. In the manufacturing apparatus 300 of FIG. 3, the peeling film roll 200 is used. The release film roll 200 winds the release film 20A having a wider width (for example, 1 to 2 m) than the release film 20 on the core 11 . The release film roll 200 is manufactured by winding the release film 20A around the core 11 by a well-known method. The release layer can be formed by arranging a plurality of stripes in parallel to the longitudinal direction of the base film. At this time, the base film side of the release film 20A may be wound on the core 11 as an inner side, or the release layer side may be wound as an inner side. The winding length of the release film roll 200 may be longer than the winding length of the release film roll 100 . The peeling film roll 200 can also be produced by adding the length of the integral multiple of the winding length of the peeling film roll 100 to the length of the loss accompanying the cutting operation. In this case, in the winding step, after the release film roll 100 is completed, the release film 20A fed from the release film roll 200 can be cut in the width direction, and the release film roll 200 can be used for other release film rolls 100. manufacture. Thereby, the efficiency of productivity can be aimed at.

The manufacturing apparatus 300 inserts the core 11 of the peeling film roll 200 into the rotating shaft 202 in the delivery part 110 provided in the upstream, and the rotating shaft 202 supports the peeling film roll 200 rotatably. In addition, the manufacturing apparatus 300 is provided with one pair of rolls 50 which pinches|interposes 20 A of peeling films pulled out from the peeling film roll 200 in an up-down direction. The manufacturing apparatus 300 is provided with the cutting part 120 which performs a cutting process, and the winding part 130 which performs a winding process in this order on the downstream side of the pair of rollers 50 which perform a conveyance process.

The material of the pair of rollers 50 includes metal, plastic, rubber, and the like. The upper roller 50a and the lower roller 50b constituting the pair of rollers 50 may be formed of different materials. For example, from the viewpoint of sufficiently contacting the release film 20A with the upper roll 50a, the upper roll 50a may be a conveying roll whose at least surface is made of rubber. In order to prevent the lower roller 50b from being deformed and the conveying speed becoming unstable, the lower roller 50b may be a metal pinching roller. The configuration of the pair of rollers 50 is not particularly limited, and in a modification, the upper roller 50a may be a nip roller, and the lower roller 50b may be a conveying roller.

The pair of rollers 50 may have a function of making the tension of the release film 20A different between the upstream side and the downstream side thereof. A torque opposite to the traveling direction of the release film 20A acts on the rotating shaft 202 of the feeding portion 110, and applies tension to the release film 20A. As a reverse torque, a friction torque, an electromagnetic brake, etc. can be used to apply it. Since the pair of rollers 50 has the function of making the tension of the release film 20A different, the tension control of the release film 20 in the cutting part 120 and the winding part 130 can be performed with a high degree of freedom.

The cutting part 120 has the upper blade roll 60a and the lower blade roll 60b. The upper blade roller 60a can be provided with a plurality of upper blades at specific intervals along the direction of its rotation axis. The upper blade of the upper blade roller 60a may be engaged with the lower blade roller 60b. The release film 20A passing through the pair of rolls 50 is cut in the longitudinal direction between the upper blade roll 60a and the lower blade roll 60b. Thereby, it is divided|segmented into the release film 20 which has a width|variety of 100-500 mm, for example. When a plurality of cores 10 are attached to the reel 102, and the cut release film 20 is pressed by the touch roll 70 and wound around the core 10, a plurality of release film rolls 100 can be produced at one time. As the cutting part 120, a well-known cutting machine such as a row blade can be used. In addition, the cutting part 120 may not be provided. In this case, one release film roll 100 can be obtained from one release film roll 200 .

The winding unit 130 includes a winding shaft 102 which is inserted into the winding core 10 of the winding roll 100 a and rotatably supports the winding core 10 . The release film 20 cut by the cutting part 120 is wound around the core 10 attached to the reel 102 in the winding part 130 . At this time, the reel 102 rotates with a predetermined torque, and the touch roll 70 presses the wound release film 20 to the core 10 side. That is, the release film 20 is wound while being pressed by the touch roll 70 . By rotating and driving the reel 102 with a specific winding torque, the winding property of the release film 20 can be improved. In addition, the magnitude of the pressing force of the contact roller 70 on the winding roll 100a can be appropriately adjusted.

In this example, the touch roller 70 and the reel 102 rotate in opposite directions, but the present invention is not limited to this. The touch roller 70 and the reel 102 may also rotate in the same direction. However, from the viewpoint of further improving the quality of the winding state and further reducing the unevenness and deformation of the surface of the release film 20, it is preferable that the touch roller 70 and the reel 102 rotate in opposite directions.

4 : is a figure which shows another example of the manufacturing apparatus which performs the manufacturing method of the peeling film roll 100. The manufacturing apparatus 301 of FIG. 4 is different from the manufacturing apparatus 300 of FIG. 3 in that it has the winding part 131 instead of the winding part 130 . The sending part 110 and the cutting part 120 of the manufacturing apparatus 301 may be the same as those of the manufacturing apparatus 300 . In the winding section 131 of the manufacturing apparatus 301, the release film 20 first comes into contact with the touch roll 70, and in the state of being in contact with the touch roll 70, the release film 20 is wound around the touch roll 70 for about half a turn, and then sandwiched between the touch roll 70 and the winding roll 100a. between. The release film 20 is wound by the reel 102 that rotates with a specific torque while being pressed between the touch roll 70 and the winding roll 100a. In this example, the release film 20 is wound while being pressed by the touch roll 70 . The touch roller 70 is driven to rotate, and the reel 102 is also driven to rotate with a specific winding torque, thereby improving the windability of the release film 20 .

FIG. 5 is a diagram schematically showing a change in the tension applied to the release film 20 wound on the winding roll 100 a in the winding sections 130 and 131 . The horizontal axis of FIG. 5 is the size of the roll shape of the winding roll 100a, and the vertical axis is the tension applied to the rolled release film 20. As shown in FIG. The straight line 1 of FIG. 5 shows the tension change when the release film 20 is wound with a constant tension and is wound with a constant tension control. In the case of constant tension control, since the release film is wound with a constant tension from the beginning to the end of the winding, on the inside, the protrusions on the surface of the core and the shape of the filler contained in the release film are transferred to the release film, which is easy to use. The surface of the release layer of the release film has unevenness.

Curve 2 of FIG. 5 shows the change in tension when the release film is wound with tapered tension control. In this case, as the winding progresses, the winding diameter becomes larger, and the tension applied to the wound release film 20 can be reduced as compared with the straight line 1 . Therefore, unevenness can be suppressed from being generated on the surface of the release layer 24 of the release film 20 .

The curve 3 of FIG. 5 shows the tension change when the release film 20 is wound by controlling the torque of the reel 102 to be constant. In this case, as the winding progresses, the roll diameter becomes larger, and the tension applied to the rolled release film 20 can be further reduced compared to the curve 2 . Therefore, the generation of unevenness on the surface of the release layer 24 of the release film 20 can be sufficiently suppressed.

The touch roller 70 is rotationally driven by the drive unit. As shown in the curve 3 of FIG. 5 , even if the release film 20 is wound with a relatively low tension, the touch roller 70 is driven to rotate while being pressed by the touch roller 70 , so that the number of adjacent release films in the radial direction of the wound roll 100 a can be reduced. Air between 20. Thereby, occurrence of winding misalignment, slip phenomenon, and winding tightness can be suppressed, and unevenness such as wrinkles and scratches can be suppressed from occurring in the release layer 24 . The rotation speed of the contact roller 70 can be fine-tuned appropriately. When the cutting speed of the cutting part 120 is constant, the rotation speed of the contact roller 70 may be substantially constant.

The material of the touch roller 70 includes metal, plastic, rubber, and the like. When the release film 20 is easily electrified, the touch roller 70 may be made conductive. The diameter of the contact roller 70 can also be appropriately adjusted according to the material of the contact roller 70 . For example, if it is a hard material, the larger diameter can be used, and if it is a soft material, the smaller diameter can be used.

FIG. 6 is a diagram showing an example of a control method of the winding unit 130 of FIG. 3 . The winding unit 130 may have: a torque control unit 81a that controls a torque T for rotationally driving the reel 102 of the winding reel 100a; and a rotational driving unit 82 that rotates and drives based on the torque information from the torque control unit 81a Reel 102. The rotational driving part 82 is rotationally driven so that the torque (winding torque) of the rotating shaft 102 becomes T based on the torque information from the torque control part 81a. In addition, the winding roll 100a is a release film roll at the time of winding the release film 20, and becomes the release film roll 100 when the winding is completed.

Let the thickness of the wound release film 20 be F[m], the width of the release film 20 be W[m], and the torque of the reel 102 that rotates the winding roll 100a to be driven to be T[N·m] , the value of T/(F·W) can be maintained in the range of 70,000～420,000 N/m. This value represents the magnitude of the torque per unit cross section imparted to the release film 20 by the reel 102 . By setting the value of T/(F·W) in the winding step to the above-mentioned range, it is possible to suppress the transfer of unevenness between the release films adjacent to each other in the radial direction of the release film roll 100 , and to reduce the air between the release films 20 . , so that the release films are sufficiently close to each other. Based on the same viewpoint, the value of T/(F·W) in the winding step may be in the range of 70,000 to 280,000 N/m, and may also be in the range of 100,000 to 210,000 N/m.

It is better that the variation of the torque T of the reel 102 is small. For example, let the maximum value of the torque T[N·m] of the reel 102 in the winding step be T _max [N·m], the minimum value be T _min [N·m], and the maximum value T _max When 1/2 of the sum with the minimum value T _min is set to _Tave [N·m], the following equations (1) and (2) can be satisfied, and the following equations (3) and (4) can also be satisfied. T _max ≦1.2×T _ave (1) T _min ≧0.8×T _ave (2) T _max ≦1.1×T _ave (3) T _min ≧0.9×T _ave (4)

In the winding step, by satisfying the following (1) and (2) or equations (3) and 4 (4), the variation range of the torque T of the reel 102 can be reduced. Thereby, the possible occurrence of winding tightness due to an increase in the torque T can be sufficiently suppressed. In addition, if the torque T is made constant in a winding process, the winding tension of the release film 20 will become low as the winding diameter r of the winding roll 100a becomes large. In the present embodiment, the release film 20 is wound by rotational driving while being pressed by the touch roller 70, so even if the winding tension is lowered, the amount of air between the release films 20 adjacent in the radial direction can be sufficiently reduced.

The manufacturing apparatus 300 may further include: a torque control unit 81b that controls the torque T' of the rotating shaft 72 of the contact roller 70; and a rotation driving unit 83 that rotationally drives and rotates based on the torque information from the torque control unit 81b Axle 72. Based on the torque information from the torque control unit 81b, the rotary drive unit 83 is driven to rotate so that the torque of the rotary shaft 72 becomes T'. When the torque T' of the touch roller 70 is increased, the tension of the wound release film 20 increases.

For example, when the roll diameter r is small, the torque T' of the touch roller 70 is reduced in order not to apply excessive tension to the release film 20 . Further, if the winding diameter r increases as the winding progresses and the torque T' is increased, the tension of the release film 20 decreases when the torque T' of the contact roller 70 assists the torque T to a constant torque or less. Thereby, the amount of air in the winding roll 100a can be reduced, and the inversion of the release film 20 with the decrease in tension can be suppressed, and the stability at the time of cutting can be improved.

The control device 300 may be composed of a pressing control unit 81c that controls the pressing force P of the contact roller 70 to the winding roll 100a and a cylinder unit 84 that actually presses the cylinder unit 84 . The cylinder portion 84 is pressed by feeding compressed air to the cylinder. The pressing of the contact roller is controlled by adjusting the air pressure of the compressed air.

The pressing force P of the contact roller 70 on the winding roll 100a may gradually increase as the roll diameter r increases. When the torque T of the reel 102 is made constant, the tension of the release film 20 becomes smaller as the reel diameter r becomes larger. Therefore, when the pressing force P of the touch roller 70 is increased, the amount of air between the radially adjacent release films 20 can be sufficiently reduced. The pressing can also be set according to the cutting speed in the cutting step, the width of the release film 20, and the like.

The reel 102 may also have a fixing mechanism for fixing the winding core 10 to the reel 102 . After the winding of the release film 20 is completed and the release film roll 100 is obtained, the cylinder portion 84 is used to move the touch roll 70 so as to be separated from the release film roll 100 . Next, the fixing mechanism of the reel 102 is released, and the release film roll 100 is unloaded from the reel 102 . In this way, the release film roll 100 can be manufactured.

The thus-produced release film roll 100 is wound up while the release film 20 is pressed against the winding roll 100a by the touch roll 70 in the winding step, and the touch roll 70 is driven to rotate. The touch roll 70 presses the release film 20 wound on the winding roll 100a toward the winding roll 100a by the pressing P. Also, the touch roller 70 is rotationally driven with a torque T'. Therefore, the escape of air between the wound release films 20 can be promoted, and the occurrence of winding deviation can be suppressed. In addition, the torque T of the reel 102 of the winding roll 100 a can be reduced, and the transfer of the concavo-convex shape to the surface of the release layer 24 of the release film 20 can be reduced. Therefore, it is possible to manufacture the release film roll 100 which has high quality in a wound state and sufficiently reduces unevenness and deformation on the surface of the release film 20 .

The control unit 80 includes torque control units 81a and 81b and a pressing control unit 81c. The control unit 80 is composed of a common computer system, which includes: CPU (Central Processing Unit: Central Processing Unit), ROM (Read Only Memory: Read Only Memory), and RAM (Ramdom Access Memory: Random Access Memory) Main memory devices, such as input devices such as keyboards and mice, output devices such as monitors, transceivers for sending and receiving data to and from various measurement units, and auxiliary memory devices such as hard disks. The torque control units 81a, 81b and the pressing control unit 81c may be included in one computer system, or may be constituted by separate computer systems.

The torque control unit 81a, the rotary drive unit 82 and the reel 102 do not need to be constituted by separate hardware bodies, and may be constituted by one or two hardware bodies. For example, the functions of the torque control unit 81a and the rotational drive unit 82 can also be realized by a commercially available torque motor. The torque control method of the torque control unit 81 is not particularly limited, and for example, a friction shaft may be used. The torque control unit 81b, the rotational drive unit 83 and the rotating shaft 72 do not need to be constituted by separate hardware bodies, and may be constituted by one or two hardware bodies. For example, the functions of the torque control unit 81b and the rotation drive unit 83 can also be realized by a commercially available torque motor. In addition, the pressing control part 81c and the cylinder part 84 do not need to be constituted by separate hardware bodies, and may be constituted by a single hardware body.

7 is a cross-sectional view of a ceramic component sheet according to an embodiment of the present disclosure. The manufacturing method of the ceramic part sheet 40 of FIG. 7 has the following steps: on the surface 24a of the peeling layer 24 of the peeling film 20 drawn from the peeling film roll 100, a paste containing ceramic powder and an electrode paste are used to form a paste containing ceramic powder and an electrode paste. Green sheet 30 of green sheet 32 and electrode green sheet 34 .

The ceramic green sheet 32 can be formed by coating and drying a ceramic paste containing ceramic powder. The electrode green sheet 34 can be formed by coating electrode paste on the ceramic green sheet 32 and drying it.

For example, in the case of a multilayer ceramic capacitor, a ceramic paste can be prepared by kneading a dielectric raw material (ceramic powder) and an organic vehicle. As a dielectric raw material, various compounds which become composite oxides or oxides by firing are exemplified. For example, carbonates, nitrates, hydroxides, organometallic compounds and the like can be appropriately selected and used. The average particle size of the dielectric raw material is 4 μm or less, preferably 0.1-3.0 μm powder.

The electrode paste can be, for example, at least one selected from the group consisting of conductive materials such as various conductive metals and alloys, and various oxides, organometallic compounds, and resinates that become conductive materials after firing. It is prepared by mixing with organic media. As the conductor material used in the production of the electrode paste, Ni metal, Ni alloy, or a mixture thereof is preferably used. To improve adhesion, the electrode paste may also contain a plasticizer. Examples of the plasticizer include phthalates such as butyl benzyl phthalate (BBP, Butyl Benzyl Phthalate), adipic acid, phosphoric acid esters, glycols, and the like.

The organic vehicle contained in the ceramic paste and the electrode paste is prepared by dissolving a binder resin in an organic solvent. Examples of the binder resin used for the organic vehicle include ethyl cellulose, acrylic resin, butyral resin, polyvinyl acetal, polyvinyl alcohol, polyolefin, polyurethane, polystyrene, and the like. Copolymers, etc. Among them, butyral-based resins, specifically polyvinyl butyral-based resins, are preferably used. By using the butyral-based resin, the mechanical strength of the ceramic green sheet can be improved. One or both of the ceramic paste and the electrode paste may optionally contain at least one additive selected from the group consisting of various dispersants, plasticizers, antistatic agents, dielectrics, glass frit, insulators, and the like.

The above-mentioned ceramic paste is applied to the surface 24a of the release layer 24 of the release film 20 using, for example, a squeegee device. Then, the applied ceramic paste is dried in a drying apparatus, for example, at a temperature of 50 to 100° C. for 1 to 20 minutes to form a ceramic green sheet 32 . The ceramic green sheet 32 shrinks by 5 to 25% compared to before drying.

Then, on the surface 32a of the ceramic green sheet 32, the above-mentioned electrode paste is printed in a specific pattern using, for example, a screen printing apparatus. The printed electrode paste is dried in a drying device, for example, at a temperature of 50 to 100° C. for 1 to 20 minutes to form an electrode green sheet 34 . In this way, the ceramic component sheet 40 in which the ceramic green sheet 32 and the electrode green sheet 34 are sequentially laminated on the release layer 24 of the release film 20 can be obtained.

When the unevenness or thickness variation of the release film 20 of the release film roll 100 becomes larger, the thickness variation range of the ceramic green sheet 32 becomes larger. The peeling film 20 pulled out from the peeling film roll 100 has sufficiently reduced the generation of damage and unevenness of the peeling layer 24 due to winding deviation and sliding phenomenon. Therefore, the ceramic green sheet 32 of thickness variation and pinholes can be sufficiently suppressed over a wide area from the front end to the rear end of the release film 20 wound on the release film roll 100 . The reliability of a ceramic part produced using the ceramic part sheet 40 having such a ceramic green sheet is good.

The thickness of the ceramic green sheet 32 and the electrode green sheet 34 may be 1.0 μm or less, respectively. Even if the thickness is so small, thickness variation is suppressed, so that a ceramic part with high reliability can be obtained. The ceramic component sheet of the present disclosure is not limited to that shown in FIG. 7 , and may be constituted only by the ceramic green sheet 32 without, for example, an electrode green sheet.

A method of manufacturing a ceramic part according to an embodiment of the present disclosure includes: a lamination step of preparing a plurality of ceramic part sheets, laminating green sheets of the plurality of ceramic part sheets to obtain a laminated body; and a firing step of firing the laminated body body to obtain a sintered body; and an electrode formation step of forming terminal electrodes on the sintered body to obtain a multilayer ceramic capacitor.

FIG. 8 is a cross-sectional view showing an example of a multilayer ceramic capacitor manufactured by the above-described manufacturing method. The multilayer ceramic capacitor 90 includes an inner layer portion 92 and an outer layer portion 93 sandwiching one of the inner layer portions 92 in the stacking direction. The multilayer ceramic capacitor 90 has terminal electrodes 95 on the side surfaces.

The inner layer portion 92 has a plurality of layers (13 layers in this example) of ceramic layers 96 (dielectric layers) and a plurality of layers (12 layers in this example) of internal electrode layers 94 . The ceramic layers 96 and the internal electrode layers 94 are alternately laminated. The internal electrode layer 94 is electrically connected to the terminal electrode 95 . The outer layer portion 93 is formed of a ceramic layer. This ceramic layer may be formed in the same manner as the ceramic green sheet 32, for example.

In the lamination step, the release film 20 of the ceramic component sheet 40 shown in FIG. 7 is peeled off to obtain a green sheet 30 . One surface 30b of the green sheet 30 is laminated on the green sheet for outer layers. The other peeling film 20 is peeled off from the other ceramic component sheet 40 to obtain another green sheet 30, and the electrode green sheet 34 of the first peeled green sheet is laminated so that one side 30b of the other green sheet 30 faces. Then, by repeating this procedure, the green sheets 30 are laminated to obtain a laminated body. That is, in this lamination step, the release film 20 is peeled off to obtain a green sheet 30, and the green sheets 30 are sequentially laminated. By repeating this sequence a plurality of times, a layered body is formed. Finally, lamination of green sheets for outer layers is also performed.

The number of laminated sheets of the green sheets of the laminated body is not particularly limited, and may be, for example, tens to hundreds of layers. A green sheet for an outer layer having a thickness where no electrode layer is formed may be provided on both end surfaces orthogonal to the lamination direction of the laminate. After forming the layered body, the layered body may be cut and used as a green sheet.

In the firing step, the layered body (green sheet) obtained in the layering step is fired to obtain a sintered body. The firing conditions are preferably 1100 to 1300°C in an atmosphere such as a humidified mixed gas of nitrogen and hydrogen. However, the oxygen partial pressure in the atmosphere during firing is preferably 10 ^-2 Pa or less, more preferably 10 ^-2 to 10 ^-8 Pa. In addition, it is preferable to perform the debindering process of a laminated body before baking. The debinder treatment can be carried out under normal conditions. For example, when a base metal such as Ni or a Ni alloy is used as the dielectric material of the internal electrode layer, it is preferably performed at 200 to 600°C.

After firing, in order to reoxidize the ceramic layer constituting the sintered body, heat treatment may be performed. The holding temperature or the maximum temperature of the heat treatment is preferably 1000 to 1100°C. The oxygen partial pressure during heat treatment is preferably higher than the oxygen partial pressure of the reducing atmosphere during firing, more preferably 10 ^-2 Pa to 1 Pa. The sintered body thus obtained is preferably subjected to face grinding by, for example, barrel grinding, sandblasting, or the like.

In the electrode forming step, the terminal electrode 95 is formed by firing the terminal electrode paste on the side surface of the sintered body, whereby the multilayer ceramic capacitor 90 shown in FIG. 8 can be obtained. In the manufacturing method of this multilayer ceramic capacitor 90, the peeling film roll 100 which has the peeling layer which fully reduces the damage by the unevenness|corrugation of the peeling film 20, winding offset, etc. is used. Therefore, thickness unevenness and pinholes of the ceramic layer 96 and the internal electrode layer 94 can be sufficiently reduced. Therefore, the breakdown of the withstand voltage is suppressed, and the reliability is excellent.

Although some embodiments have been described above, the present disclosure is not limited to the above-mentioned embodiments. For example, although the example of forming a multilayer ceramic capacitor as a ceramic component has been described, the ceramic component of the present disclosure is not limited to a multilayer ceramic capacitor, and may be other ceramic components, for example. The ceramic part can also be, for example, a varistor or a multilayer inductor. [Example]

Although the content of the present disclosure will be described in more detail with reference to Examples and Comparative Examples, the present disclosure is not limited to the following Examples.

(Example 1) <Production of peeling film roll> In order to prepare a release film, a release agent solution was prepared according to the following procedure. For 100 parts by mass of nonanediol diacrylate, prepare 0.25 parts by mass of acrylate-modified silicone oil (trade name: X-22-2445, manufactured by Shin-Etsu Chemical Co., Ltd.), and 100 parts by mass of methyl ethyl acetate ketone, and 100 parts by mass of toluene. These were put into a metal container, stirred and mixed to obtain a colorless and transparent solution.

2.5 parts by mass of a reaction initiator (trade name: Omnirad127, manufactured by IGM Rasins B.V.) was added to the above solution to prepare a coating liquid. The coating liquid was extruded from the gap of the coating device, and coated on one side of a biaxially stretched polyethylene terephthalate film (PET film, thickness: 30 μm) with a width of 1100 mm, and heated at a temperature of 80°C. The air was blown for 30 seconds to evaporate methyl ethyl ketone and toluene. In this way, a coating layer is formed on the PET film.

Next, ultraviolet rays are irradiated in a nitrogen atmosphere with an oxygen concentration of 100 ppm to harden the coating layer to form a peeling layer with a peeling function. In this way, a release film (before cutting) having a release layer on one surface of the PET film was obtained. Using a scanning white interference microscope (device name: VS1540, manufactured by Hitachi Hightech Co., Ltd.), the surface roughness (Rp) of the release layer of the release film was measured. As a result, the surface roughness (Rp) of the peeling layer was 30 nm. The thickness of the peeling layer was 1 μm. Such a release film was wound around a core to obtain a release film roll (before cutting). In addition, the total length of the produced release film was 7000 m.

Using the manufacturing apparatus shown in FIG. 3, the said peeling film roll 200 (before cutting) was attached to the rotating shaft 202. The peeling film pulled out from the peeling film roll 200 (before cutting) was cut into five rolls along the long side by the cutting unit 120, and the size was set to a width of 200 mm. As shown in FIG. 3 , five rolls of the release film (after cutting) were each wound around the core 10 made of FRP having an outer diameter of 88.2 mm so that the release layer 24 became the outside. At the time of winding, the touch roll 70 is pressed against the winding roll 100a, and the release film is wound around the core 10 while the reel 102 and the touch roll 70 are rotationally driven. A friction shaft is used as the reel 102 .

The torque T of the reel 102 is fixed at 0.868 N·m. That is, the maximum value T _max and the minimum value T _min are both 0.868 N/m. The value of T/(F·W) was 140,000 N/m. The winding length of the obtained 5 release film rolls was all 6000 m.

<Quality evaluation of winding state> The winding state of the release film roll was visually evaluated. Among the side surfaces, the case where the side end portions of the release films were arranged neatly without winding offset was evaluated as "A", and the case with winding offset was evaluated as "B". The results are shown in Table 1.

<Formation and Evaluation of Dielectric Green Sheet> Using the produced release film roll, a dielectric green sheet was formed as a ceramic component sheet in the following procedure. BaTiO3 _- based powder was prepared as a ceramic powder, polyvinyl butyral (PVB) as an organic binder, and methanol as a solvent, respectively. Next, with respect to 100 parts by mass of the ceramic powder, 10 parts by mass of the organic binder and 165 parts by mass of the solvent were prepared, and kneaded with a ball mill to obtain a dielectric slurry.

The release film roll is installed on the coating machine, and the dielectric slurry is coated on the release layer side of the release film pulled out from the release film roll to form a dielectric green sheet on the surface of the release layer of the release film. The thickness of the dielectric green sheet was set at 0.9 μm. The thickness variation of the dielectric green sheet was measured by using a transmission-type X-ray film thickness gauge (trade name: AccureX, manufactured by Hutec Co., Ltd.) installed in-line. Determination. The thickness variation range is obtained from the average value, maximum value and minimum value of the thickness. That is, the larger value of the absolute value of the maximum value and the average value and the absolute value of the minimum value and the average value is used as the thickness variation width. In addition, the release film within a length of 100 m from the rear end of the release film roll wound on the core was not formed into a dielectric green sheet due to restrictions on the coater device.

For the dielectric green sheets on the produced release films, the pinholes and the thickness variation of the dielectric green sheets were investigated. As long as the thickness of the dielectric green sheet is in the range of 0.855 μm to 0.945 μm, that is, the thickness variation is 0.045 μm (±5% of the set thickness), it is considered a good product. The thickness fluctuation range is 0.03 μm, which is a good product. Also, no pinhole was detected.

(Examples 2 to 7) A release film roll was produced in the same manner as in Example 1, except that the torque T of the reel 102 was changed as shown in Table 1 by changing the friction shaft used as the reel 102 . In the same manner as in Example 1, the quality evaluation of the wound state and the formation and evaluation of the dielectric green sheets were performed. The results are shown in Table 1.

(Comparative Example 1) The same friction shaft as in Example 7 was used. The release film is wound without using a touch roll. When the quality evaluation of the winding state of the obtained release film roll was performed, the cut surface (end surface) of the release film was uneven on the side surface of the release film roll. Moreover, when the peeling film roll is unloaded from the reel after the winding is completed, the peeling film on the inner side slides, and the peeling film roll is deformed like a bamboo shoot. The reason for this is considered to be that the contact roll was not used although the tension of the wound release film decreased as the roll diameter became larger. In this state, the dielectric paste could not be applied by the coating device, so the evaluation was ended at this point. In addition, when unwinding the release film roll and observing the release film, deformation such as folding of the release film can be seen in the area within about 3 cm from the side end to the inner side.

(Comparative Example 2) Adjust the torque of the reel of the winding roll, and wind the release film in such a way that the tension applied to the wound release film is constant (constant tension control). In the same manner as in Example 1, the quality evaluation of the winding state of the obtained release film roll, and the formation and evaluation of the dielectric green sheet were performed. The results are shown in Table 1.

Air was observed to be entrapped by the release film roll. In addition, the part close to the core of the release film roll, specifically, in the release film with a length in the range of 100 m to 500 m from the rear end of the release film roll wound on the core, as the inner dielectric is changed. The thickness variation of the green sheets deteriorated, and the thickness variation of the dielectric green sheets was 0.06 μm. In this way, there is a portion where the thickness fluctuation range exceeds the range of ±5% of the set thickness, which is a defect. In addition, in the release film whose length from the rear end of the release film roll wound around the core was in the range of 100 m to 250 m, the thinned part of the dielectric green sheet in the form of a pinhole was observed.

[Table 1] Torque T of the reel [N m] T/(F·W) [N/m] Quality of the coiled state Thickness fluctuation range [μm] Example 1 0.868 140,000 A 0.03 Example 2 0.434 70,000 A 0.03 Example 3 0.651 105,000 A 0.03 Example 4 1.302 210,000 A 0.03 Example 5 1.736 280,000 A 0.035 Example 6 2.170 350,000 A 0.04 Example 7 2.604 420,000 A 0.045 Comparative Example 1 2.604 420,000 B - Comparative Example 2 Tension constant control A ~0.06

[Industrial Availability] According to the present disclosure, even if the winding length of the release film is increased, the quality of the wound state is high, and the unevenness and deformation of the surface of the release film can be sufficiently reduced, and a release film roll and a manufacturing method thereof can be provided. Moreover, by using such a peeling film roll, the ceramic component sheet which has excellent reliability, and its manufacturing method can be provided. Furthermore, by using such a ceramic component sheet, a ceramic component having excellent reliability and a manufacturing method thereof can be provided.

10: roll core 11: roll core 20: peel off film 20A: Release film 22: substrate film 24: Peel layer 24a: Surface 30: Green Sheet 30b: one side 32: Ceramic green sheet 32a: Surface 34: electrode green sheet 40: Ceramic parts sheet 50: Roller 50a: top roll 50b: Lower roll 60a: Upper edge roller 60b: Lower edge roller 70: Contact Roller 72: Rotary axis 80: Control Department 81a: Torque control section 81b: Torque control section 81c: Press the control part 82: Rotary drive part 83: Rotary drive part 84: Cylinder block 90: MLCC 92: inner layer 93: Outer Department 94: Internal electrode layer 95: Terminal electrode 96: Ceramic layer 100: peel off film roll 100a: winding roll 102: Scroll 110: Delivery Department 120: Cutting part 130: winding part 131: Winding Department 200: Peel film roll 202: Rotary axis 300: Manufacturing Device 301: Manufacturing Device P: press r: roll diameter T: torque T': torque

Fig. 1 is a perspective view of a release film roll according to an embodiment. FIG. 2 is a cross-sectional view showing an example of a release film. FIG. 3 is a view showing an example of a manufacturing apparatus of a peeling film roll. FIG. 4 is a view showing another example of the manufacturing apparatus of the peeling film roll. FIG. 5 is a diagram schematically showing a change in the tension of the release film wound around the winding roll in the winding section. FIG. 6 is a diagram showing an example of a control method of the winding unit. Fig. 7 is a cross-sectional view of a ceramic component sheet according to an embodiment. FIG. 8 is a cross-sectional view showing a ceramic part according to an embodiment.

10: roll core

11: roll core

20: peel off film

20A: Release film

50: Roller

50a: top roll

50b: Lower roll

60a: Upper edge roller

60b: Lower edge roller

70: Contact Roller

100: peel off film roll

100a: winding roll

102: Scroll

110: Delivery Department

120: Cutting part

130: winding part

200: Peel film roll

202: Rotary axis

300: Manufacturing Device

Claims (9)

A method for producing a release film roll, which has a winding step of rolling a release film around the above-mentioned winding roll while pressing a touch roll to the winding roll, In the above-mentioned winding step, the above-mentioned release film is wound up while the above-mentioned touch roll is rotationally driven. The method for producing a release film roll according to claim 1, wherein in the above-mentioned winding step, When the thickness of the release film is set to F [m], the width of the release film is set to W [m], and the torque for rotationally driving the reel of the winding roll is set to T [N·m], T The value of /(F·W) is maintained within the range of 70,000 to 420,000 N/m. The method for producing a release film roll according to claim 1 or 2, wherein in the above-mentioned winding step, the maximum value of the torque T [N·m] for rotating the reel for driving the above-mentioned winding roll is set to T _max [N·m ], when the minimum value is set to T _min [N·m], and 1/2 of the sum of the above-mentioned maximum value and the above-mentioned minimum value is set to T _ave [N·m], the following equations (1) and ( 2), T _max ≦1.2×T _ave (1) T _min ≧0.8×T _ave (2). The method for producing a release film roll according to any one of claims 1 to 3, comprising: a conveying step of conveying the release film using a conveying roller; and a cutting step, which cuts the above-mentioned release film along the longitudinal direction; and Before cutting the said release film, the said release film was pinched by the nip roll and the said conveyance roll. A release film roll obtained by the manufacturing method as in any one of claims 1 to 4. A method for producing a ceramic part sheet, comprising the steps of: using a surface of a release layer of the above-mentioned release film drawn out from a release film roll obtained by the production method according to any one of claims 1 to 4, using a ceramic material comprising ceramic A paste of powder to form a ceramic green sheet. A method for producing a ceramic part having a sintered body, comprising the steps of: using the above-mentioned ceramic part sheet obtained by the production method as claimed in claim 6, to obtain a layered body comprising the above-mentioned ceramic green sheet; and The above-mentioned layered body is fired to obtain the above-mentioned sintered body. A ceramic part sheet, which forms a green sheet comprising a ceramic green sheet on the surface of the release layer of the above-mentioned release film drawn from the release film roll obtained by the manufacturing method of any one of claims 1 to 4 and obtained. A ceramic part provided with a sintered body, the sintering system forming a layered body of ceramic green sheets including the ceramic part sheet according to claim 8, and obtained by firing the layered body.

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