TWI789717B - Release film roll and manufacturing method thereof, ceramic part sheet and manufacturing method thereof, and ceramic part and manufacturing method thereof - Google Patents

Abstract

This disclosure provides a method of manufacturing a release film roll, which has a winding step of pressing the touch roll on the winding roll and winding the release film with the winding roll, and in the winding step, rotating the touch roll while driving the roll around the release film. The present disclosure provides a method for manufacturing a ceramic component sheet, which has the following steps: on the surface of the release layer of the release film drawn from the release film roll obtained by the above-mentioned manufacturing method, a paste containing ceramic powder is used to form a ceramic green body piece.

Description

Release film roll and manufacturing method thereof, ceramic part sheet and manufacturing method thereof, and ceramic part and manufacturing method thereof

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

In recent years, with the demand for miniaturization of electronic equipment, electronic components have gradually been miniaturized. Ceramic parts, which are one type of electronic parts, are also being miniaturized year by year. For example, multilayer ceramic capacitors, which are one type of ceramic components, are designed to increase capacitance by reducing the thickness of the dielectric layer and internal electrodes. A general multilayer ceramic capacitor is manufactured by using a release film as a carrier film, forming a dielectric layer and internal electrodes on the carrier film as a green sheet, peeling off the green sheet, and laminating them.

When the thickness of the dielectric layer of the laminated ceramic capacitor becomes thinner, the withstand voltage performance indicating the withstand voltage strength, which causes problems such as short circuit, tends to decrease. In particular, when the thickness of the dielectric layer is not uniform, the thinner part will be the cause of the decrease in withstand voltage performance. A multilayer ceramic capacitor having a 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 rate of the laminated ceramic capacitor is improved.

Damage or the like in the release film used as the carrier film of the dielectric layer becomes a factor of variation in the thickness of the dielectric layer. In addition, the smoothness of the release film surface will affect the thickness uniformity of the dielectric layer. In view of such a situation, for example, in Patent Document 1, a release film roll capable of smoothing the release film and reducing thickness unevenness of the dielectric layer has been studied. [Prior Art Literature] [Patent Document]

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

[Problem to be solved by the invention]

In the manufacturing process of ceramic parts, a ceramic green sheet is formed on the surface of the release layer of the release film pulled out from the release film roll. Here, as measures for improving the productivity of ceramic parts, it is considered that it is effective to lengthen the winding length of the release film wound on the release film roll and reduce the replacement frequency of the release film roll.

On the other hand, when the smoothed release film is wound around a core, the air between adjacent release films tends to be difficult to escape. If the air escapes unevenly, the center will be eccentric, and the quality of the peeling film in the wound state will be reduced. In order to improve the quality of the winding state, it is necessary to suppress the occurrence of winding deviation, etc., 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 shape of the protrusions on the surface of the core and 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. There is a risk of unevenness and deformation on the surface (peeling surface). In order to suppress such shape transfer, it is necessary to wind the release film with a relatively low tension. In view of such matters, if the winding length of the release film becomes longer, it will be difficult to balance the quality of the winding state and the reduction of unevenness and deformation of the release film only by torque control of the reel.

Therefore, the present disclosure provides a release film roll with high quality in the rolled state, which can sufficiently reduce unevenness and deformation on the surface of the release film, and a manufacturing method thereof. Also, the present disclosure provides a ceramic component sheet having excellent reliability by using such a release film roll, and a manufacturing method thereof. Also, the present disclosure provides a ceramic part having excellent reliability by using such a ceramic part sheet and a manufacturing method thereof. [Technical means to solve the problem]

The manufacturing method of the peeling film roll disclosed in the present disclosure has a winding step. While pressing the touch roll to the winding roll, the release film is wound on the winding roll. In the winding step, the touch roll is rotated and driven while winding and peeling off. membrane. The transfer of the peeling film can use a transfer roller. In addition, a winding roll means the film roll of the state which wound up the film containing a release film on a core.

In the above manufacturing method, in the winding step, the touch roll is pressed against the winding roll, and the release film is wound up on the winding roll while rotating and driving the touch roll. By pressing and rotating the touch roller, air escape between the rolled release films can be promoted. Thereby, the torque of a winding roll can be reduced, the transfer of the uneven|corrugated shape in a peeling film can be suppressed, and generation|occurrence|production of a winding misalignment can be suppressed. Therefore, it is possible to manufacture a release film roll in which the quality of the rolled state is high and the unevenness and deformation on the surface of the release film are sufficiently reduced.

In the above manufacturing method, in the winding step, the thickness of the peeling film is set to F[m], the width of the peeling film is set to W[m], and the torque of the reel for rotating and driving the winding roll is set to T[N ·m], the value of T/(F·W) can be maintained within the range of 70,000 to 420,000 N/m.

In the case of winding without using a touch roll as before, if the value of T/(F·W) is set within the above range, the unevenness caused by transfer can be sufficiently reduced, but it is difficult to wind the release film. A force acts on the peeling film wound to the inner side, and the so-called winding deviation is deviated in the direction perpendicular to the winding direction. In the above-mentioned winding step, since the touch roller presses the release film and is rotationally driven, even if the value of T/(F·W) is within the above-mentioned range, occurrence of winding deviation can be suppressed. As a result, the transfer of the uneven shape in the peeling film and the occurrence of winding deviation can be further suppressed. Therefore, it is possible to manufacture a release film roll in which the quality of the rolled state is sufficiently high, and furthermore, unevenness and deformation on the surface of the release film are reduced.

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

By satisfying the above formula (1) and formula (2), the torque variation of the reel can be reduced. Thereby, it can fully suppress that the tension|tensile_strength of the peeling film wound up changes suddenly, the winding position of a winding roll deviates, and a wrinkle arises.

The above-mentioned manufacturing method may include a conveyance step of conveying the release film using a conveyance roller, and a cutting step of cutting the release film in the longitudinal direction. Before cutting the release film, the release film may be sandwiched between a nip roll and a conveyance roll. By pinching the release film between the nip roll and the conveying roll, a specific tension can be given to the cut release film. Thereby, the cutting step can be performed smoothly, and the shape of the cut part of the peeling film can be adjusted with high precision.

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

A method of manufacturing a ceramic component sheet according to an aspect of the present disclosure includes the step of forming a ceramic green sheet using a paste containing ceramic powder on the surface of the peeling layer of the peeling film pulled out from any of the above peeling film rolls.

The above-mentioned production method uses a release film drawn from any one of the above-mentioned release film rolls. The above-mentioned release film roll can sufficiently suppress the generation of damage on the surface of the release film due to winding misalignment, and the generation of unevenness on the surface of the release film due to transfer. Therefore, it is possible to form a ceramic green sheet with sufficiently reduced thickness variations and pinholes 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 manufactured. In this disclosure, the "rear end" of the release film refers to the end on the side in contact with the core, and the "front end" of the release film refers to the end that appears on the outer peripheral surface of the release film roll.

A method of manufacturing a ceramic part according to an aspect of the present disclosure has the following steps: using the ceramic part sheet obtained by the above-mentioned manufacturing method to obtain a laminated body including ceramic green sheets; and firing the laminated body to obtain a sintered body.

In the above manufacturing method, ceramic parts are manufactured using a release film that sufficiently suppresses surface irregularities and thickness variations due to winding misalignment and transfer. Thereby, it is possible to form a ceramic green sheet with sufficiently reduced thickness variations and pinholes. Therefore, ceramic parts excellent in reliability can be manufactured.

A ceramic component sheet according to an aspect of the present disclosure can be obtained by forming a green sheet including a ceramic green sheet on the surface of a release layer of a release film drawn from any of the release film rolls described above.

The above-mentioned ceramic component sheet is obtained using a release film pulled out from any one of the above-mentioned release film rolls. The release layer of the above-mentioned release film has sufficiently suppressed surface unevenness and deformation caused by winding deviation 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 according to an aspect of the present disclosure includes a sintered body obtained by forming a laminate of ceramic green sheets including the above ceramic component sheet and firing the laminate. The thickness variation and pinholes of the above-mentioned ceramic green sheets have been substantially reduced. The above-mentioned ceramic part has excellent reliability because it includes a sintered body obtained by firing a laminate 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 rolled state is high, and the unevenness and deformation of the surface of the release film can be sufficiently reduced and the production method thereof can be provided. In addition, a ceramic component sheet having excellent reliability and a method of manufacturing the same can be provided by using such a release film roll. In addition, it is possible to provide a ceramic component sheet having excellent reliability by using such a ceramic component sheet and a method of manufacturing the same.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings depending on the situation. In each drawing, the same symbol is marked for the same or equivalent elements, 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 of an embodiment. The peeling film roll 100 of FIG. 1 is equipped with the peeling film 20 which has a base film and a peeling layer, and the core 10 by which the peeling film 20 was wound. The release film 20 is used as a carrier film, for example, in the manufacturing process of ceramic parts represented by laminated ceramic capacitors. In this manufacturing step, for example, a ceramic green sheet to be a dielectric green sheet and an electrode green sheet to be an internal electrode are formed by coating or printing on a release film, and then these are peeled off. And laminated, fired laminated body to manufacture ceramic parts. The release film 20 is used after being pulled out from the release film roll 100 .

Examples of the material of the core 10 include paper, plastic, metal, and the like. When manufacturing ceramic parts, since particles can cause pinholes, it is preferable to include light-weight plastics that do not generate paper dust. Examples of such materials include ABS resins, phenolic resins, and fiber-reinforced plastics. Fiber-reinforced plastics are preferred due to their flexibility in addition to their high mechanical strength. Examples of fiber-reinforced plastics include ones in which fibers are reinforced with a thermosetting resin. Examples of the resin include epoxy resins, unsaturated polyester resins, and the like. Examples of the fiber include glass fiber, aramid fiber, and the like. In consideration of cost and the like, the resin may be an unsaturated polyester resin. Based on the same viewpoint, the fibers may be glass fibers.

The outer diameter of the winding core 10 may be less than 150 mm, or less than 100 mm. 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 release film roll 100 can be reduced, thereby improving the production efficiency of various products. The thickness of the release film 20 may be 10-110 μm, or 20-60 μm. The width of the release film 20 may be, for example, 0.1-2 m. In addition, in this disclosure, when pulling out and winding a release film, the direction in which the release film is conveyed is referred to as the longitudinal direction, and the direction perpendicular 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 surface 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 polystyrene resins such as nylon. Amide resins, polyvinyl chloride resins, polyurethane resins, fluorine-based resins, and polyphenylene sulfide resins. Among them, polyester resin is preferred. Among the polyester resins, polyethylene terephthalate (PET, polyethylene terephthalate) is more preferable in terms of mechanical properties, transparency, cost, and the like.

The thickness of the base film 22 is preferably 10-100 μm, more preferably 20-50 μm. When the thickness is less than 10 μm, physical properties such as dimensional stability of the release film 20 tend to be impaired. When the thickness exceeds 100 μm, the manufacturing 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 the transparency is not impaired. The release film roll 100 of this embodiment can sufficiently suppress the 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 even if the base film 22 contains the filler. 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, and any method such as reverse coating, gravure coating, bar coating, bar coating, Meyer bar coating, die coating, or spray coating may be used. For drying, hot air drying, infrared drying, natural drying, etc. can be used. In order to suppress moisture condensation during drying, it is preferable to heat, and it can be about 60-120°C.

Examples of the release agent for forming the release layer 24 include silicone-based release agents, long-chain alkyl-based release agents, fluorine-based release agents, and amino alkyd resin-based release agents. Silicone-based release agents include addition reaction-based silicone release agents, condensation-based silicone release agents, and ultraviolet-curable silicone 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 silicone, it can be hardened by heat treatment at 80-130°C for tens of seconds. In the case of an ultraviolet curing system, a mercury lamp, a metal halide lamp, etc. can be used as a light source, and it can be cured by irradiating ultraviolet rays. In the case of radical polymerization by irradiating ultraviolet rays, it is preferable to cure in a nitrogen atmosphere in order to prevent oxygen inhibition. It is better that the variation range of the thickness of the peeling layer 24 is small.

The addition reaction silicone release agent reacts with hydrogen siloxane to harden polydimethylsiloxane with vinyl groups introduced into the terminal and/or side chain. Hardening can use a platinum catalyst. For example, it can be hardened for tens of seconds to several minutes at a hardening temperature of about 100°C. The thickness of the release 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 can also be comprised, for example by the cured product of (meth)acrylate component and (meth)acrylate modified silicone. Since this 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 a filler, the protrusion by a filler can be covered and the surface (release surface) of the peeling layer 24 can be smoothed. In this case, the thickness of the release 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 applied to the base film 22, and then the solvent is dried. In this way, the peeling 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, known ones can be used. For example, X-22-164A, X-22-164B, X-22-174DX, X-22-2445 (all are brand names) etc. manufactured by Shin-Etsu Chemical Co., Ltd. are mentioned.

The surface of the release layer 24 of the release film 20 is preferably smooth. Specifically, the surface roughness (Rp) of the release layer 24 is preferably 100 nm or less, more preferably 50 nm or less. The surface roughness (Rp) of the release layer 24 in this 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 according to one embodiment includes: a conveying step of conveying the peeling film using a conveying roller; a cutting step of cutting the peeling film along the longitudinal direction; and a winding step of pressing the touch roller on one side. A winding roll is used, and the peeling film is wound with a winding roll on one side. The conveying step may be performed either or both before and after the cutting step.

FIG. 3 is a diagram showing an example of a manufacturing apparatus for performing the manufacturing method of the release film roll 100 . In the manufacturing apparatus 300 of FIG. 3, the release film roll 200 is used. The release film roll 200 winds up the release film 20A having a wider width (for example, 1 to 2 m) than the release film 20 around the core 11 . The release film roll 200 is manufactured by winding up the release film 20A around the core 11 by a well-known method. The release layer may be formed by arranging a plurality of them in stripes so as to be parallel to the longitudinal direction of the base film. At this time, the base film side of 20 A of release films may be wound up on the core 11, or may be wound up with the release layer side inside. The winding length of the release film roll 200 may be longer than that of the release film roll 100 . The peeling film roll 200 can also be produced by adding the length of the loss amount accompanying the cutting operation to the length which is an integral multiple of the winding length of the peeling film roll 100 . In this case, in the winding step, after the release film roll 100 is completed, the release film 20A sent out from the release film roll 200 can be cut in the width direction, and the release film roll 200 can be continuously used in other release film rolls 100. manufacture. Thereby, productivity efficiency 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 equipped with the pair of roll 50 which pinches|interposes the release film 20A pulled out from the release film roll 200 in the up-down direction. The manufacturing apparatus 300 is sequentially provided with the cutting part 120 which performs the cutting process, and the winding part 130 which performs the winding process on the downstream side of the pair of rollers 50 which perform the conveying process.

Examples of the material of the pair of rollers 50 include metal, plastic, rubber, and the like. The upper roller 50a and the lower roller 50b constituting the pair of rollers 50 may be made of different materials. For example, the top roll 50a may be a conveyance roll made of rubber at least on the surface from the viewpoint of sufficiently contacting the release film 20A with the top roll 50a. In order to prevent the lower roller 50b from deforming itself and causing the conveying speed to become unstable, the lower roller 50b may be a pinch roller made of metal. The configuration of the pair of rollers 50 is not particularly limited, and in a modified example, the upper roller 50a may be used as a nip roller, and the lower roller 50b may be used as a transfer 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. A torque opposite to the traveling direction of the peeling film 20A acts on the rotating shaft 202 of the delivery unit 110 to apply tension to the peeling film 20A. As the reverse torque, friction torque, electromagnetic brake, etc. can be used to apply it. Since the pair of rollers 50 have the function of varying the tension of the release film 20A, the tension control of the release film 20 in the cutting unit 120 and the winding unit 130 can be performed with a high degree of freedom.

The cutting unit 120 has an upper blade roller 60a and a lower blade roller 60b. The upper blade roller 60a may 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 is engageable with the lower blade roller 60b. The release film 20A passing through the pair of rolls 50 is cut along the longitudinal direction between the upper blade roll 60a and the lower blade roll 60b. Thereby, it divides into the peeling film 20 which has a width of 100-500 mm, for example. If a plurality of winding cores 10 are installed on the reel 102, and the cut release film 20 is pressed by the touch roller 70 and wound on the winding core 10, a plurality of release film rolls 100 can be manufactured at one time. As the cutting unit 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 inserted into the winding core 10 of the winding roll 100 a to rotatably support the winding core 10 . The peeling film 20 obtained by cutting by the cutting part 120 is wound up on the core 10 attached to the reel 102 in the winding part 130 . At this time, the reel 102 rotates with a specific torque, and the touch roller 70 presses the wound release film 20 against the core 10 side. That is, the release film 20 is wound up while being pressed by the touch roll 70 . By rotating the reel 102 with a specific winding torque, the winding property of the release film 20 can be improved. In addition, the pressing force of the touch roller 70 on the winding roll 100a can be appropriately adjusted.

In this example, the touch roller 70 and the reel 102 rotate counterclockwise, but the present invention is not limited thereto. The contact roller 70 and the reel 102 can also rotate in the same direction. However, from the standpoint of further improving the quality of the wound state and further reducing unevenness and deformation on the surface of the release film 20 , it is preferable that the touch roller 70 and the reel 102 rotate in opposite directions.

FIG. 4 is a diagram showing another example of a manufacturing apparatus for performing the manufacturing method of the release 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 delivery unit 110 and the cutting unit 120 of the manufacturing device 301 may be the same as those of the manufacturing device 300 . In the winding part 131 of the manufacturing device 301, the peeling film 20 is first in contact with the touch roll 70, and in the state of contact with the touch roll 70, after about half a turn around the touch roll 70, it is sandwiched between the touch roll 70 and the winding roll 100a. between. The release film 20 is pressed between the touch roll 70 and the winding roll 100a, and is wound up by the reel 102 rotating with a specific torque. In this example, the release film 20 is wound up while being pressed by the touch roll 70 . The contact 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 changes in tension applied to the release film 20 wound up on the winding roll 100 a in the winding portions 130 and 131 . The horizontal axis of FIG. 5 is the size of the roll shape of the wound roll 100a, and the vertical axis is the tension applied to the rolled release film 20 . The straight line 1 in FIG. 5 represents the change in tension when the release film 20 is wound at a constant tension and the winding is controlled at a constant tension. 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 The surface of the release layer of the release film has unevenness.

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

Curve 3 in FIG. 5 shows the change in tension when the release film 20 is wound while the torque of the reel 102 is controlled to be constant. In this case, as the winding progresses, the winding diameter becomes larger, and the tension applied to the winding release film 20 can be further reduced compared to curve 2 . Therefore, occurrence 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 a drive unit. As shown in curve 3 of FIG. 5 , even if the release film 20 is wound with a relatively low tension, the touch roll 70 is pressed by the touch roll 70 and rotated to drive the touch roll 70, so the number of release films adjacent in the radial direction of the winding roll 100a can be reduced. 20 rooms of air. Thereby, occurrence of winding misalignment, slipping phenomenon, and excessive winding can be suppressed, and occurrence of irregularities such as wrinkles and scratches on the peeling layer 24 can be suppressed. The rotation speed of the touch roller 70 can be finely adjusted appropriately. When the cutting speed of the cutting unit 120 is constant, the rotational speed of the touch roller 70 may be substantially constant.

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

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

Let the thickness of the rolled 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 and drives the winding roll 100a be T[N·m] At this time, 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 section of the release film 20 that the reel 102 imparts. By setting the value of T/(F·W) in the winding step within the above-mentioned range, it is possible to suppress the transfer of unevenness between adjacent release films in the radial direction of the release film roll 100, and reduce the air between the release films 20 , so that the peeling films are sufficiently adhered to each other. Based on the same point of view, the value of T/(F·W) in the winding step may be in the range of 70,000-280,000 N/m, or in the range of 100,000-210,000 N/m.

The variation of the torque T of the reel 102 should be 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 to the minimum value T _min is T _ave [N·m], the following formulas (1) and (2) can be satisfied, and the following formulas (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 formulas (3) and 4 (4), the variation range of the torque T of the winding shaft 102 can be reduced. Thereby, it is possible to sufficiently suppress the overtightening of the winding which may occur due to the increase of the torque T. Moreover, if the torque T is made constant in a winding process, the winding tension of the peeling film 20 will become low as the winding diameter r of the winding roll 100a becomes large. In this embodiment, since the release film 20 is pressed by the touch roller 70 and wound up by rotational driving, even if the winding tension becomes low, the amount of air between the release films 20 adjacent in the radial direction can be sufficiently reduced.

The manufacturing apparatus 300 may also have: a torque control part 81b that controls the torque T' of the rotating shaft 72 of the touch roller 70; Shaft 72. The rotational drive unit 83 is rotationally driven so that the torque of the rotary shaft 72 becomes T' based on the torque information from the torque control unit 81b. When the torque T' of the touch roller 70 is increased, the tension of the peeling film 20 to be wound 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. Furthermore, if the torque T' is increased as the winding progresses, the winding diameter r becomes larger, and the torque T' of the contact roller 70 can assist the reduction of the tension of the release film 20 when the torque T is equal to or less than a constant torque. Thereby, the amount of air in the winding roll 100a can be reduced, and the inversion of the peeling film 20 as the tension decreases can be suppressed, and the stability at the time of cutting can be improved.

Sometimes the control device 300 is composed of a pressing control unit 81c that controls the pressing P of the touch roller 70 on the winding roll 100a and a cylinder unit 84 that generates the actual pressing. The cylinder portion 84 is pressed by sending compressed air into the cylinder. The pressing of the touch roller is controlled by adjusting the air pressure of the compressed air.

The pressing P of the touch roller 70 on the winding roll 100a can gradually increase as the roll diameter r increases. When the torque T of the reel 102 is kept constant, the tension of the peeling film 20 becomes smaller as the reel diameter r becomes larger. Therefore, if the pressing force P of the touch roller 70 is increased, the amount of air between the release films 20 adjacent in the radial direction can be sufficiently reduced. The pressure 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 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 touch roller 70 is moved using the cylinder part 84 so as to be separated from the release film roll 100 . Then, the fixing mechanism of the reel 102 is released, and the peeling film roll 100 is unloaded from the reel 102 . In this way, the release film roll 100 can be manufactured.

The peeling film roll 100 manufactured in this way presses the peeling film 20 to the winding roll 100a with the touch roll 70 in a winding process, and winds up the peeling film 20 while rotating and driving this touch roll 70. The contact roller 70 presses the release film 20 wound up on the winding roll 100a toward the winding roll 100a by the pressing force P. As shown in FIG. 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 misalignment can be suppressed. In addition, the torque T of the reel 102 of the winding roll 100a can be reduced, and the transfer of unevenness 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 in which the quality of the rolled state is high and the unevenness and deformation of the surface of the release film 20 are sufficiently reduced.

The control unit 80 has torque control units 81a and 81b and a pressing control unit 81c. The control unit 80 is composed of a common computer system, and the computer system 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 keyboards and mice, output devices such as displays, sending and receiving units for data transmission and reception with various measurement units, and auxiliary memory devices such as hard disks, etc. 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 part 81a, the rotation driving part 82 and the reel 102 do not need to be composed of separate hardware, but can also be composed of one or two hardware. For example, the functions of the torque control unit 81a and the rotation driving unit 82 can also be realized by commercially available torque motors. The torque control method of the torque control part 81 is not specifically limited, For example, a friction shaft can also be used. The torque control part 81b, the rotation driving part 83 and the rotating shaft 72 do not need to be constituted by individual hardware, and may also be constituted by one or two hardware. For example, the functions of the torque control unit 81b and the rotation driving unit 83 can also be realized by a commercially available torque motor. Also, the pressing control part 81c and the cylinder part 84 do not need to be constituted by separate hardware, but may be constituted by one hardware.

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

The ceramic green sheet 32 can be formed by applying a ceramic paste containing ceramic powder and drying it. The electrode green sheet 34 can be formed by coating an 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. Examples of dielectric raw materials include various compounds that become composite oxides or oxides by firing. For example, carbonates, nitrates, hydroxides, organometallic compounds and the like can be appropriately selected and used. The average particle diameter of the dielectric material is less than 4 μm, preferably 0.1-3.0 μm powder.

For example, the electrode paste can be at least one selected from the group consisting of various conductive metals and alloys and other conductive materials, and various oxides, organic metal compounds, resinates, etc., which become conductive materials after firing. Or, mixed with an organic medium and prepared. As the conductor material used for producing the electrode paste, Ni metal, Ni alloy, or a mixture thereof is preferably used. In order 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 binder resins used in organic vehicles include ethyl cellulose, acrylic resins, butyral resins, polyvinyl acetal, polyvinyl alcohol, polyolefins, polyurethanes, polystyrene, and the like. Copolymer etc. Among them, it is preferable to use a butyral-based resin, specifically, a polyvinyl butyral-based resin. By using a butyral resin, the mechanical strength of a 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, static removers, dielectrics, glass powder, and insulators.

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 doctor blade device or the like. And, the coated ceramic paste is dried in a drying device, for example, at a temperature of 50-100° C. for 1-20 minutes to form a ceramic green sheet 32 . The ceramic green sheet 32 shrinks by 5 to 25% compared to before drying.

Thereafter, on the surface 32a of the ceramic green sheet 32, the above-mentioned electrode paste is printed in a predetermined pattern using, for example, a screen printing device. The printed electrode paste is dried in a drying device, for example, at a temperature of 50-100° C. for 1-20 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.

If 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 occurrence of damage and irregularities on the peeling layer 24 due to winding misalignment, sliding phenomena, and the like. Therefore, the ceramic green sheet 32 with 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 ceramic parts produced by using the ceramic part sheet 40 having such a ceramic green sheet have good reliability.

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

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

Fig. 8 is a cross-sectional view showing an example of a multilayer ceramic capacitor manufactured by the above-mentioned manufacturing method. The multilayer ceramic capacitor 90 includes an inner layer portion 92 and an outer layer portion 93 sandwiching the inner layer portion 92 in the stacking direction. Multilayer ceramic capacitor 90 has terminal electrodes 95 on 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 . Ceramic layers 96 and internal electrode layers 94 are laminated alternately. The internal electrode layer 94 is electrically connected to the terminal electrode 95 . The outer layer portion 93 is formed of a ceramic layer. The ceramic layer can also be formed, for example, in the same manner as the ceramic green sheet 32 .

In the lamination step, the release film 20 of the ceramic component sheet 40 shown in FIG. 7 is peeled off to obtain the green sheet 30 . One side 30b of this green sheet 30 is laminated on the outer layer green sheet. Another peeling film 20 is peeled off from another 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 30 b of the other green sheet 30 faces. Thereafter, by repeating this procedure, the green sheets 30 are laminated to obtain a laminate. That is, in this lamination step, the release film 20 is peeled off to obtain the green sheet 30, and the green sheets 30 are sequentially laminated. By repeating this sequence a plurality of times, a laminate is formed. Finally, the green sheet for the outer layer is also laminated.

The number of laminated green sheets of the laminate is not particularly limited, and may be, for example, tens to hundreds of layers. A green sheet for an outer layer having a thickness not to be formed with an electrode layer may also be provided on both end surfaces perpendicular to the lamination direction of the laminate. After forming the laminated body, the laminated 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 carried out at 1100-1300°C in an atmosphere of humidified mixed gas of nitrogen and hydrogen. However, the oxygen partial pressure in the atmosphere during firing is preferably at most 10 ^-2 Pa, more preferably 10 ^-2 to 10 ^-8 Pa. In addition, it is preferable to perform binder removal treatment of the laminate before firing. The binder removal treatment can be carried out under normal conditions. For example, when base metals such as Ni or Ni alloys are used as the dielectric material of the internal electrode layer, it is preferable to carry out at 200 to 600°C.

After firing, heat treatment may be performed in order to re-oxidize the ceramic layer constituting the sintered body. The holding temperature or maximum temperature of the heat treatment is preferably 1000-1100°C. The oxygen partial pressure during heat treatment is preferably higher than that of the reducing atmosphere during firing, more preferably 10 ^-2 Pa to 1 Pa. It is preferable to subject the sintered body thus obtained to end surface 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, and the multilayer ceramic capacitor 90 shown in FIG. 8 can be obtained. In the method of manufacturing the multilayer ceramic capacitor 90, the release film roll 100 having a release layer that sufficiently reduces damage due to unevenness and winding misalignment of the release film 20 is used. Therefore, thickness unevenness and pinholes of the ceramic layer 96 and the internal electrode layer 94 can be sufficiently reduced. Therefore, the decrease in withstand voltage is suppressed, and the reliability is excellent.

As mentioned above, although some embodiment was described, this indication is not limited to the said embodiment. For example, an example of forming a laminated ceramic capacitor as a ceramic component has been described, but the ceramic component of the present disclosure is not limited to the laminated ceramic capacitor, and may be other ceramic components, for example. The ceramic component can also be, for example, a varistor or a multilayer inductor. [Example]

Although the contents 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) ＜Making of peeling film roll＞ In order to prepare a release film, a release agent solution was prepared in 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.), 100 parts by mass of methyl ethyl alcohol Ketone, and 100 parts by mass of toluene. These were put into a metal container and stirred and mixed to obtain a colorless transparent solution.

2.5 parts by mass of a reaction initiator (trade name: Omnirad 127, manufactured by IGM Rasins B.V.) was added to the above solution to prepare a coating solution. Extrude the coating liquid from the gap of the coating device, and coat it on one side of a biaxially stretched polyethylene terephthalate film (PET film, thickness: 30 μm) with a width of 1100 mm. The wind blows for 30 seconds to evaporate methyl ethyl ketone and toluene. In this way, a coating layer was formed on the PET film.

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

The above-mentioned release film roll 200 (before cutting) is attached to the rotating shaft 202 using the manufacturing apparatus shown in FIG. 3 . The release film pulled out from the release film roll 200 (before cutting) was cut into five rolls along the long side by the cutting unit 120, and was set to a size of 200 mm in width. As shown in FIG. 3 , five rolls of the release film (after cutting) were wound up on FRP cores 10 each having an outer diameter of 88.2 mm so that the release layer 24 was on the outside. At the time of winding, the touch roll 70 is pressed against the winding roll 100a, and the release film is wound up on the core 10 while rotating the winding shaft 102 and the touch roll 70 . 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, both the maximum value T _max and the minimum value T _min are 0.868 N/m. The value of T/(F·W) was 140,000 N/m. The winding lengths of the obtained five release film rolls were all 6000 m.

＜Quality evaluation of winding state＞ The winding state of the release film roll was evaluated visually. Among the side faces, the case where the side ends of the release film were aligned neatly without winding deviation was evaluated as "A", and the case with winding deviation was evaluated as "B". The results are shown in Table 1.

<Formation and Evaluation of Dielectric Green Sheets> Using the produced release film roll, dielectric green sheets were formed as ceramic component sheets in the following procedure. Prepare BaTiO ₃ series powder as ceramic powder, polyvinyl butyral (PVB, Polyvinyl butyral) as organic binder, and methanol as solvent. Next, for 100 parts by mass of the ceramic powder, 10 parts by mass of an organic binder and 165 parts by mass of a solvent were prepared and kneaded with a ball mill to obtain a dielectric slurry.

The release film roll is installed in a coater, and the dielectric slurry is coated on the release layer side of the release film drawn from the release film roll to form a dielectric green sheet on the release layer surface of the release film. The thickness setting value of the dielectric green sheet is 0.9 μm. The variation range of the thickness of the dielectric green sheet is to use a transmission type X-ray film thickness gauge (trade name: AccureX, manufactured by Hutec Co., Ltd.) installed in a row, one side crosses the width direction of the release film and the other side continues along the long side direction Determination. The thickness variation range is obtained from the average value, maximum value and minimum value of the thickness. That is, the greater value of the absolute value of the maximum value-average value and the absolute value of the minimum value-average value is set as the width of thickness variation. 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 coating machine.

For the dielectric green sheet on the produced release film, the pinholes and the thickness variation range of the dielectric green sheet were investigated. As long as the thickness of the dielectric green sheet is within the range of 0.855 μm to 0.945 μm, that is, the thickness variation range is 0.045 μm (±5% of the set thickness), it is a good product. The variation range of thickness is 0.03 μm, which is a good product. Also, pinholes were not detected.

(Embodiments 2-7) 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 . Quality evaluation of the wound state, formation and evaluation of the dielectric green sheet were performed in the same manner as in Example 1. The results are shown in Table 1.

(comparative example 1) The same friction shaft as in Example 7 was used. Winding of the release film was performed 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 irregular on the side surface of the release film roll. Also, after the winding is completed, if the release film roll is removed from the reel, the release film on the inner side will slide, and the release film roll will deform like a bamboo shoot. The reason for this is considered to be that the touch roll was not used although the tension of the peeling film wound up decreased as the roll diameter became larger. In this state, the dielectric slurry could not be coated with the coating device, so the evaluation was terminated at this point. In addition, when the release film roll is unrolled and the release film is observed, the folded deformation of the release film can be seen in the area within about 3 cm from the side end to the inside.

(comparative example 2) The torque of the winding shaft is adjusted so that the tension applied to the wound release film is constant, and the release film is wound (tension constant control). Quality evaluation of the winding state of the obtained release film roll, formation and evaluation of a dielectric green sheet were performed similarly to Example 1. The results are shown in Table 1.

Air was observed to be entrapped in the release film roll. Also, the part close to the core of the release film roll, specifically, in the release film whose length is in the range of 100 m to 500 m from the rear end of the release film roll wound on the core, becomes the inner dielectric The thickness variation range of the green sheet deteriorated, and the thickness variation range of the dielectric green sheet was 0.06 μm. In this way, if there is a part whose thickness variation range exceeds ±5% of the set thickness, it is considered bad. Also, in the release film whose length was in the range of 100 m to 250 m from the rear end of the release film roll wound on the core, a portion of the dielectric green sheet that was thinned in a pinhole-like form was observed.

[Table 1] Reel Torque T [N·m] T/(F·W) [N/m] The quality of winding state Thickness variation [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 constant tension control A ~0.06

[Industrial availability] According to this disclosure, even if the winding length of the release film is increased, the quality of the rolled state is high, and the release film surface has sufficiently reduced irregularities and deformations, and a method for manufacturing the same can be provided. In addition, a ceramic component sheet having excellent reliability and a method of manufacturing the same can be provided by using such a release film roll. In addition, a ceramic part having excellent reliability and a method of manufacturing the same can be provided by using such a ceramic part sheet.

10: Core 11: Core 20: Peel off film 20A: Peel-off film 22: Substrate film 24: peeling layer 24a: surface 30: green sheet 30b: one side 32: ceramic green sheet 32a: surface 34: electrode green sheet 40: ceramic parts sheet 50: roll 50a: Upper roller 50b: Lower roller 60a: Upper blade roller 60b: Lower blade roller 70: contact roller 72: axis of rotation 80: Control Department 81a: Torque control unit 81b: Torque control unit 81c: Press the control part 82:Rotary drive unit 83:Rotary drive unit 84: Cylinder body 90:Laminated Ceramic Capacitors 92: inner part 93: outer part 94: Internal electrode layer 95: terminal electrode 96: ceramic layer 100: peel film roll 100a: winding roll 102: scroll 110: sending department 120: cutting part 130: winding department 131: Winding department 200: peel film roll 202: Rotation axis 300: Manufacturing device 301: Manufacturing device P: press r: volume diameter T: Torque T': Torque

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

10: Core

11: Core

20: Peel off film

20A: Peel-off film

50: roll

50a: Upper roller

50b: Lower roller

60a: Upper blade roller

60b: Lower blade roller

70: contact roller

100: peel film roll

100a: winding roll

102: scroll

110: sending department

120: cutting part

130: winding department

200: peel film roll

202: Rotation axis

300: Manufacturing device

Claims (8)

A method of manufacturing a peeling film roll, which has a winding step. On one side, the touch roll is pressed on the winding roll, and on the other hand, the peeling film having a base film and a release layer is wound on the winding roll. In the winding step , while rotating and driving the above-mentioned contact roller, while controlling the torque of the reel shaft of the above-mentioned winding roll to wind the above-mentioned peeling roll in such a way that the tension applied to the above-mentioned release film is reduced as the roll diameter of the above-mentioned winding roll becomes larger. membrane. The manufacturing method of the peeling film roll according to claim 1, wherein in the above-mentioned winding step, the thickness of the above-mentioned peeling film is set as F [m], the width of the above-mentioned release film is set as W [m], and the above-mentioned roll is driven by rotation The torque of the winding reel is set to T[N. m], keep the value of T/(F.W) within the range of 70,000~420,000N/m. The manufacturing method of the peeling film roll according to claim 1 or 2, wherein in the above-mentioned winding step, the torque T [N. The maximum value of m] is set to T _max [N. m], set the minimum value to T _min [N. m], and set T _ave [N. m], the following formulas (1) and (2) are satisfied, T _max ≦1.2×T _ave (1) T _min ≧0.8×T _ave (2). The method of manufacturing a release film roll according to claim 1 or 2, comprising: a conveying step of conveying the peeling film using a conveying roller; and a cutting step of cutting the peeling film in the longitudinal direction; and Before cutting the said peeling film, the said peeling film is pinched by the nip roll and the said conveyance roll. A method for manufacturing a ceramic component sheet, comprising the following steps: on the surface of the peeling layer of the above-mentioned peeling film pulled out from the peeling film roll obtained by the manufacturing method according to any one of claims 1 to 4, use a ceramic Paste of powder to form ceramic green sheet. A method of manufacturing a ceramic part having a sintered body, comprising the steps of: using the above-mentioned ceramic part sheet obtained by the manufacturing method according to claim 5, to obtain a laminate comprising the above-mentioned ceramic green sheet; and firing the above-mentioned laminate , to obtain the above sintered body. A ceramic part sheet, which is formed on the surface of the peeling layer of the above-mentioned peeling film drawn from the peeling film roll obtained by the manufacturing method in any one of claims 1 to 4, and forms a green sheet comprising a ceramic green sheet And get. A ceramic part, which has a sintered body, the sintered system forms a laminated body of ceramic green sheets including the ceramic part sheet according to claim 7, and the laminated body is obtained by firing the laminated body.

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